From marc.wyburn at googlemail.com  Tue Nov  7 09:27:28 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 7 Nov 2006 06:27:28 -0800
Subject: sound processing modules in python - anyone?
In-Reply-To: <mailman.1820.1162850780.11739.python-list@python.org>
References: <mailman.4783.1162830903.11738.python-list@python.org>
	<mailman.1820.1162850780.11739.python-list@python.org>
Message-ID: <1162909648.042525.172190@i42g2000cwa.googlegroups.com>

I've had a brief look at this and there isn't a sound orientated
library as such.  You can however use numpy to do stuff like FFTs and
there are there is a wave module in python that will allow you to
create wavs, you can google for importing wav's into numpy arrays.
This seemed like a good idea to me as I think Numpy is written in C or
C++ (or maybe it was fortran).  There seem to be a lot of people using
numpy in a similar way to matlab so there is a fair ammount of the
standard DSP routines have already been written.


sittner at lkb.ens.fr wrote:
> Hi everyone,
> I'm looking for a module for sound processing (manipulating sound objets,
> filters, ffts etc.).
> I tried Snack, but when i downloaded the package that was supposed to be
> for python, there was only the Tk/Tcl stuff (where's the .py ?).
> could anyone help me with that (or with any other sound module for python)?
> thanks in advance,
> g



From fredrik at pythonware.com  Sat Nov 11 18:14:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 00:14:37 +0100
Subject: reduce to be removed?
In-Reply-To: <1163285443.536672.289940@m73g2000cwd.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
Message-ID: <ej5lgv$f4e$1@sea.gmane.org>

Dustan wrote:

> It's always nice to know there are such good-natured people ready to
> help on this group.

any special reason why you keep pretending that some random wikipedia 
editor knows more about a future Python release than the people that 
develops Python ?

> Anyway, I figured out a way to get the builtin
> function 'sum' to work as I need:
> sum([[1,2,3],[4,5,6],[7,8,9]],  [])

sum() is designed for adding numbers, not sequences.  abusing it
for sequences leads to inefficient code, and extremely bad worst-
case behaviour, since you end up copying the same data over and
over and over again -- the function even checks for strings for
this very reason:

 >>> sum(["123", "456", "789"], "")
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: sum() can't sum strings [use ''.join(seq) instead]

(maybe it should check for other well-known containers as well?)

if you care about writing robust code, why not just use a for-loop,
and the list extend method?

</F>



From cameron.walsh at gmail.com  Wed Nov  8 21:37:04 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 09 Nov 2006 10:37:04 +0800
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <mailman.1952.1163038156.11739.python-list@python.org>
References: <B57127370.889.19118.1@mxextra>	<9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>	<7d2580610611081618g69db3e25k6d21cd6d1f15d8a7@mail.gmail.com>
	<mailman.1952.1163038156.11739.python-list@python.org>
Message-ID: <eiu46k$hte$2@enyo.uwa.edu.au>

Gabriel Genellina wrote:
> At Wednesday 8/11/2006 21:18, Nicolas G wrote:
> 
>> > How can I use python to get the real IP address of my DSL router (when
>> > my PC is part of the local home LAN) ?
>>
>> <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994
>>
>>
>> import
>>  win32api raise the error "module not exsit"

http://sourceforge.net/projects/pywin32/

>> and
>> socket.gethostbyname(name)the router doesn't have a hostname.

use the hostname you create on noip.com or dyndns.com etc.


Cameron.


From erinhouston at gmail.com  Sun Nov  5 02:40:10 2006
From: erinhouston at gmail.com (ina)
Date: 4 Nov 2006 23:40:10 -0800
Subject: WebScraping
In-Reply-To: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
References: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <1162712409.970901.159970@b28g2000cwb.googlegroups.com>

This might be of help to you.
http://phlik.ishpeck.net/index.php?P=a1141076600phlik

http://phlik.ishpeck.net/index.php?P=b1134168973phlik

Graham Feeley wrote:
> Can someone steer me to scripts / modules etc on webscraping please???
> Ultimately I would like someone to write a script for me.
> However i am still searching for documentation on this subject
> Thanks Graham



From michael at stroeder.com  Mon Nov  6 18:47:32 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Tue, 07 Nov 2006 00:47:32 +0100
Subject: python-ldap/win32 or python/ldap/win32
In-Reply-To: <1162852448.012799.208740@b28g2000cwb.googlegroups.com>
References: <1162852448.012799.208740@b28g2000cwb.googlegroups.com>
Message-ID: <k5u424-foa.ln1@nb2.stroeder.com>

rcmn wrote:
> i'm running around in circle trying to to use python/ldap/ on
> win32(WinXP).

Maybe this message sent to the python-ldap-dev mailing list helps.
You're welcome to follow up on this list.

Ciao, Michael.

-------- Original Message --------
Subject: Experimental 2.2.0 Windows Build
Date: Mon, 4 Sep 2006 22:58:26 -0300
From: Sidnei da Silva <dreamcatcher at users.sf.net>
To: python-ldap-dev at lists.sourceforge.net

Hello there,

I've managed to put together an experimental 2.2.0 build for Windows,
which can be found here:

  http://awkly.org/files/python-ldap-2.2.0.win32-py2.4.exe

I'm admittedly not an expert in compiling stuff, so if anyone with
more expertise can double-check what I've did:

  http://awkly.org/archive/compiling-python-extensions-on-mingw/


... specially the change from '-shared' to '-mdll -static' on the
arguments to 'ld', I would really *really* appreciate.

For the brave folks willing to try out the installer itself, you're at
your own risk, but please report back any issues.

If the build turns out to work fine and people are willing to bless
this as the official Windows build and upload it to sourceforge I
would be more than glad.

It was built with mingw against:

  openldap-2.2.29
  openssl-0.9.8b

-- 
Sidnei da Silva


From p.lavarre at ieee.org  Fri Nov 10 10:17:55 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 07:17:55 -0800
Subject: to Doctest as SystemExit is to Python
References: <1163136324.202924.165630@k70g2000cwa.googlegroups.com>
	<ej1drr$64p$00$1@news.t-online.com>
Message-ID: <1163171875.151236.226850@i42g2000cwa.googlegroups.com>

(((I thought I had sent this reply already, Google says No.)))

> > Can I somehow tell doctest that it's time to quit?
> > ... doctest redefines ... SystemExit ...
>
> Hit Ctrl-C. Or raise a KeyboardInterrupt:

Yes!  Thank you!!!  I see now,

Doctest exactly reverses the python -i experience:

        doctest exits quietly if I raise KeyboardInterrupt.
        doctest catches SystemExit and prints the traceback.

        python -i exits quietly if I raise SystemExit.
        python -i catches KeyboardInterrupt and prints the traceback.

Of course, to make the doctest work as sketched, I had to strip the
trailing blanks that my browser introduced and I had to expect
tracebacks for raise Exception and raise SystemExit, e.g.:

>>> import sys
>>> sys.exit()
Traceback (most recent call last):
  ...
SystemExit
>>>



From DustanGroups at gmail.com  Sat Nov 11 20:42:32 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 17:42:32 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2122.1163291415.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
Message-ID: <1163295752.701124.322620@h54g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> Dustan wrote:
>
> >>  > Because I'm embedding this expression in a list comprehension
> >>
> >> because?
>  >
> > Because I thought I would be able to get an answer without revealing
> > the exact details of what I am doing.
>
> alright, let's try again: why do you need a self-contained reduce
> replacement that can be embedded inside a list comprehension ?
>
> </F>


>>> foo =\
[[[1,2,3],[4,5,6],[7,8,9]],
 [[3,2,1],[6,5,4],[9,8,7]]]

Here, foo appears to be a 3-dimensional list - except it's supposed to
be 2-dimensional. The inner-list-of-lists is a result of how I'm
producing the data, and now I want to do a mass-concatenation (or
extending) of the inner-list-of-lists, and come up with this result:

>>> foo == [[1,2,3,4,5,6,7,8,9],[3,2,1,6,5,4,9,8,7]]
True

What's the best way to accomplish this?

It's not quite this simple, but let's just see what you can come up
with the information at hand, and I'll see if I can adapt it to my
needs.



From Leo.Kislov at gmail.com  Fri Nov 17 05:30:35 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 17 Nov 2006 02:30:35 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<455CED78.1060604@v.loewis.de>
	<bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>
	<455CF4BA.1050608@v.loewis.de>
Message-ID: <1163759435.551233.76030@j44g2000cwa.googlegroups.com>


Martin v. L?wis wrote:
> gabor schrieb:
> >> All this code will typically work just fine with the current behavior,
> >> so people typically don't see any problem.
> >>
> >
> > i am sorry, but it will not work. actually this is exactly what i did,
> > and it did not work. it dies in the os.path.join call, where file_name
> > is converted into unicode. and python uses 'ascii' as the charset in
> > such cases. but, because listdir already failed to decode the file_name
> > with the filesystem-encoding, it usually also fails when tried with
> > 'ascii'.
>
> Ah, right. So yes, it will typically fail immediately - just as you
> wanted it to do, anyway; the advantage with this failure is that you
> can also find out what specific file name is causing the problem
> (whereas when listdir failed completely, you could not easily find
>  out the cause of the failure).
>
> How would you propose listdir should behave?

How about returning two lists, first list contains unicode names, the
second list contains undecodable names:

files, troublesome = os.listdir(separate_errors=True)

and make separate_errors=True by default in python 3.0 ?

  -- Leo



From vdicarlo at gmail.com  Fri Nov 10 10:05:03 2006
From: vdicarlo at gmail.com (vdicarlo)
Date: 10 Nov 2006 07:05:03 -0800
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
Message-ID: <1163171103.549085.108610@m7g2000cwm.googlegroups.com>

> I highly recommend wxPython. It's very mature, full-featured, and
> portable, and fairly easy to learn as well.

I am also a Python beginner thinking about what GUI toolkit to use, and
the availability of a free video screencast series on installing and
using wxpython at showmedo.com is making me want to go that way. I
viewed their introduction to Python resources and wished I had found it
first.

The wxpython series is at http://tinyurl.com/yggean

Vincent



From jmdeschamps at gmail.com  Thu Nov  9 03:29:46 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 9 Nov 2006 00:29:46 -0800
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <n2t924-frs.ln1@eskimo.tundraware.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
	<n2t924-frs.ln1@eskimo.tundraware.com>
Message-ID: <1163060986.314142.22060@k70g2000cwa.googlegroups.com>


Tim Daneliuk wrote:
> Sefyroth wrote:
> > Thanks,
> >
> > but I get this error when I try this.
> >
> > UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
> > position 12: ordinal not in range(128)
> >
> >  I had encountered it with the askdirectory method as well. Is there an
> > easy way to bypass this?
> >
> > Thanks again
>
> I believe you are running into a directory or file name that has
> non-ascii characters in it.  Python as shipped is set up to
> deal with ascii as its native encoding format.  You can change
> this by editing the "site.py" file - look in the Lib directory
> in your python installation.  Look for this code:
>
> -------------------------------
> def setencoding():
>      """Set the string encoding used by the Unicode implementation.  The
>      default is 'ascii', but if you're willing to experiment, you can
>      change this."""
>      encoding = "ascii" # Default value set by _PyUnicode_Init()
>      if 0:
>          # Enable to support locale aware default string encodings.
>          import locale
>          loc = locale.getdefaultlocale()
>          if loc[1]:
>              encoding = loc[1]
> -------------------------------
>
>
>
> Change the "if 0:" to "if 1:" and see if that doesn't fix the problem.
>
>
>
> --
> ----------------------------------------------------------------------------
> Tim Daneliuk     tundra at tundraware.com
> PGP Key:         http://www.tundraware.com/PGP/

you could also use encode("iso-8859-1") to nterpret just the printed
name such as:
print myfilename.encode("iso-8859-1")

and by the way if you wanted the file NAME you could have used
openfilename() instead of openfile()    ;-)

jean-marc



From sjmachin at lexicon.net  Mon Nov  6 18:07:57 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 15:07:57 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
Message-ID: <1162854476.903789.5550@b28g2000cwb.googlegroups.com>


Andrea Griffini wrote:
> John Machin wrote:
>
> > The fact that C3 and C2 are both present, plus the fact that one
> > non-ASCII byte has morphoploded into 4 bytes indicate a double whammy.
>
> Indeed...
>
>  >>> x = u"f?dselsdag"
>  >>> x.encode('utf-8').decode('iso-8859-1').encode('utf-8')
> 'f\xc3\x83\xc2\xb8dselsdag'
>

Indeed yourself. Have you ever considered reading posts in
chronological order, or reading all posts in a thread? It might help
you avoid writing posts with non-zero information content.

Cheers,
John



From rupole at hotmail.com  Wed Nov  8 08:42:55 2006
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 8 Nov 2006 08:42:55 -0500
Subject: More elegant way to obtain ACLs / permissions for windows
	directories than using "cacls" dos command?
References: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>
	<1162952479_41619@sp6iad.superfeed.net>
	<1162988020.060319.124030@b28g2000cwb.googlegroups.com>
	<1162988715.639810.125270@f16g2000cwb.googlegroups.com>
Message-ID: <1162993589_43917@sp6iad.superfeed.net>


dananrg at yahoo.com wrote:
> Could you give an example for listing security descriptors using the
> win32security module? I looked at the documentation but found it
> confusing. Thanks.

There are some examples of using the security descriptor objects in
\Lib\site-packages\win32\Demos\security.
Also, searching the Python-win32 mailing list should turn up some
more code.

            Roger




----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From antoine at vo.lu  Tue Nov  7 12:38:17 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 07 Nov 2006 18:38:17 +0100
Subject: shutil: permission denied errors on windows
In-Reply-To: <1162919896.527769.38750@m73g2000cwd.googlegroups.com>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
	<1162858987.931532.61530@h48g2000cwc.googlegroups.com>
	<af162$45505aea$544abc47$10376@news.hispeed.ch>
	<1162919896.527769.38750@m73g2000cwd.googlegroups.com>
Message-ID: <3931e$4550c48b$544abc47$5625@news.hispeed.ch>

Yes, that's exactly what was the case... But see my other post, that 
straightens things up...

Thanks!
antoine


John Henry wrote:
> Okay, it's always good that strange things are repeatable and happens
> with simple scripts.
> 
> Are you saying "a" is a folder?  So, the failure is only with copying
> folder?  Not individual file?
> 
> 
> 
> Antoine De Groote wrote:
>> Yes it's strange, I never had the problem before, either. It seems now
>> to be only the case for folders. A very simple
>>
>> shutil.copy('a', 'b')
>>
>> already fails with the error message.
>>
>> I reinstalled Python, but that didn't change anything...
>>
>> Regards,
>> antoine
>>
>> John Henry wrote:
>>> I use the copy function a lot and never have problem.  I suggest that
>>> you write a no brainer standalone test code and if it still fails
>>> there, then you have a problem with your installation.
>>>
>>> Antoine De Groote wrote:
>>>> Google tells quite some things about it, but none of them are satisfactory.
>>>>
>>>> I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13]
>>>> Permission denied all the time, for the source files. It seems that this
>>>> is the case for all my files. But what I don't understand is that
>>>> yesterday it still worked. I didn't change anything on my system though
>>>> (at least not that I am aware of). I restarted the computer several
>>>> times to see if that helped, but it didn't. Also I can't find a process
>>>> that would be using the files...
>>>>
>>>> Has anybody experienced this problem before, or have a solution?
>>>>
>>>> Kind regards,
>>>> antoine
>>>>
>>>> Here's the code that throws the errors
>>>>
>>>> [...]
>>>> for l in files:
>>>>              from_file = os.path.join(dir, l)
>>>>              to_file = from_file.replace(tree_top, backup_dir)
>>>>              try:
>>>>                  if not os.path.exists(to_file):
>>>>                      log('Copying new      %s' % from_file)
>>>>                      counter_new += 1
>>>>                      shutil.copy2(from_file, to_file)
>>>>                  elif int(os.path.getmtime(from_file)) >
>>>> int(os.path.getmtime(to_file)):
>>>>                      log('Copying modified %s' % from_file)
>>>>                      counter_mod += 1
>>>>                      shutil.copy2(from_file, to_file)
>>>>                  elif os.path.getsize(from_file) > os.path.getsize(to_file):
>>>>                      log('Sizes differ, but not rest: Copying %s' %
>>>> from_file)
>>>>                      counter_special += 1
>>>>                      shutil.copy2(from_file, to_file)
>>>>                  elif os.path.getsize(from_file) < os.path.getsize(to_file):
>>>>                      log('Orig file smaller than backup file: Copying
>>>> %s' % from_file)
>>>>                      counter_special += 1
>>>>                      shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
>>>>                      shutil.copy2(from_file, to_file)
>>>>                  else:
>>>>                      #log('not treated: %s' % l)
>>>>                      pass
>>>>
>>>>              except (OSError, IOError), e:
>>>>                  not_accessible += 1
>>>>                  print e
>>>> [...]
> 


From icebergwtf at yahoo.com.cn  Wed Nov  1 23:47:48 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Thu, 2 Nov 2006 12:47:48 +0800 (CST)
Subject: Make all files extension lower by a given directory name
Message-ID: <20061102044749.57630.qmail@web15006.mail.cnb.yahoo.com>

Fredrik Lundh wrote:
> that's not how splitext works, though:
>
> >>> os.path.splitext("FOO.BAR")
> ('FOO', '.BAR')
>
> can you post an example of a filename that misbehaves on your machine?
>
> </F>

To Fredrik Lundh and Tim Chase:

My task was read all tga file names and generate a config xml file,
then pass this xml file to a utility, but this utillity only read files with
extension 'tga' than 'TGA'.

I tried name + ext first but I got two dots between them, so I wrote
code that way (the strip thing), and it worked.
Today it does not work (the strip code cut last character from file name, like you said :) ),
and I changed it back, now everything is OK. I really don't know what
happened yesterday.

Thanks.

PS. I have python24, python25, python.NET and IronPython installed on my machine,
and .py file associate to python24.


		
___________________________________________________________ 
????????-3.5G???20M??? 
http://cn.mail.yahoo.com


From noah.rawlins at comcast.net  Thu Nov 30 21:25:57 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Thu, 30 Nov 2006 21:25:57 -0500
Subject: best way to align words?
In-Reply-To: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
Message-ID: <zY6dnXp7Fa0uD_LYnZ2dnUVZ_oGdnZ2d@comcast.com>

Robert R. wrote:
> Hello,
> 
> i would like to write a piece of code to help me to align some sequence
> of words and suggest me the ordered common subwords of them
> 
> s0 = "this is an example of a thing i would like to have".split()
> s1 = "another example of something else i would like to have".split()
> s2 = 'and this is another " example " but of something ; now i would
> still like to have'.split()
> ...
> alist = (s0, s1, s2)
> 
> result should be : ('example', 'of', 'i', 'would', 'like', 'to', 'have'
> 
> but i do not know how should i start, may be have you a helpful
> suggestion?
> a trouble i have if when having many different strings my results tend
> to be nothing while i still would like to have one of the, or maybe,
> all the best matches.
> 
> best.
> 

Your requirements are a little vague... how are these three strings handled?

s1 = "hello there dudes"
s2 = "dudes hello there"
s3 = "there dudes hello"

they all share the 3 words, but what order do you want them back?

here is a simplistic approach using sets that results in a list of words 
that are in all strings ordered arbitrarily by their order in the first 
string ( it also doesn't worry about matches (or lack of) due to 
punctuation and case and crap like that)

 >>> strList = []
 >>> strList.append('this is an example of a thing i would like to have')
 >>> strList.append('another example of something else i would like to 
have')
 >>> strList.append('and this is another " example " but of something ; 
now i would still like to have')
 >>> [word for word in strList[0].split() if word in reduce(lambda x, y: 
x.intersection(y), [set(str.split()) for str in strList])]
['example', 'of', 'i', 'would', 'like', 'to', 'have']

but you still have issues with mutiple matches and how they are handled 
etc...

noah


From DustanGroups at gmail.com  Sat Nov  4 11:08:27 2006
From: DustanGroups at gmail.com (Dustan)
Date: 4 Nov 2006 08:08:27 -0800
Subject: disabledforeground or similar for Entry (in Tkinter)
In-Reply-To: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
References: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
Message-ID: <1162656507.768215.60630@f16g2000cwb.googlegroups.com>


Dustan wrote:
> Back in this post, I attempted to make a label look like a button:
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/a83195d3970a6851/2053cbaec1bc1f19?auth=DQAAAHkAAAAMDAWnhNnzpuKlwOKZUwAGUTtT2Ay-EAB7rCY6SnwfnDzZ98M37bZDW2Is0LrBVrr8XEgPfcuOkiUE-CrSsKbBSX-67voDUXfbATBd0eYNMClezby4EXT2fuLm6f0llJ_xMO8BfkjVho_7CZvlf_9tNGnJixTbq8zr21ODZBhouQ
>
> Alright, I've learned my lesson - don't use a new widget; modify the
> old one.
>
> Except the Entry widget doesn't have a disabledforeground option.
> Neither does the Text widget, but IDLE seems to accomplish making a
> disabled Text look the same as an enabled Text in the IDLE Help
> section.
>
> No, foreground (fg) and background (bg) don't make a difference; it
> still changes the color of the Entry widget upon disabling.
>

> There must be something I'm missing here...

Yes there is! I assumed that
http://www.pythonware.com/library/tkinter/introduction/x4447-options.htm
was telling the truth, in that it's not listed there.



From scott.daniels at acm.org  Thu Nov  2 23:19:31 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 02 Nov 2006 20:19:31 -0800
Subject: Style for modules with lots of constants
In-Reply-To: <XU32h.436$lx6.417@tornado.texas.rr.com>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
Message-ID: <454aba90$1@nntp0.pdx.net>

Paul McGuire wrote:
> class Constants(object):
>     pass
> 
> Then I defined the context for my LEFT and RIGHT constants, which are being 
> created to specify operator associativity, and then my constant fields as 
> attributes of that object:
> 
> opAssoc = Constants(object)
> opAssoc.RIGHT = 0
> opAssoc.LEFT = 1

I like something like:

     class Constants(object):
         def __init__(self, **kw):
             for name, val in kw.iteritems():
                 setattr(self, name, val)
Then:
     opAssoc = Constants(RIGHT=0, LEFT=1)

> In your example, this would look something like:
> 
> fileusage = Constants()
> fileusage.Transcript = 1
> fileusage.TextMode = 2

     fileusage = Constants(Transcript=1, TextMode=2)
     filemode = Constants(Read=1, Write=2, Append=4)
     filemode.WriteAppend = filemode.Write | filemode.Append

class Constants then becomes a nice place to define methods
to convert values to associated names for debugging and such.

--Scott David Daniels
scott.daniels at acm.org


From no-spam at no-spam-no-spam.invalid  Mon Nov  6 09:18:29 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 06 Nov 2006 15:18:29 +0100
Subject: Erronous "unsupported locale setting" ?
In-Reply-To: <1162820153.697175.18190@h54g2000cwb.googlegroups.com>
References: <ein814$ml1$1@news.albasani.net>
	<1162820153.697175.18190@h54g2000cwb.googlegroups.com>
Message-ID: <eing7n$2be$1@news.albasani.net>

Leo Kislov wrote:
> robert wrote:
>> Why can the default locale not be set by its true name? but only by '' ? :
> 
> Probably it is just not implemented. But since locale names are system
> specific (For example windows accepts 'ch' as Chinese in Taiwan, where
> as IANA <http://www.iana.org/assignments/language-subtag-registry>
> considers it Chamorro) setlocale should probably grow an additional
> keyword parameter: setlocale(LC_ALL, iana='de-DE')

that'd be another fat database to blow up the python core(s).

I just wonder why locale.setlocale(locale.LC_ALL,"de_DE") doesn't accept the name, which 
>>> locale.getlocale() / getdefaultlocale()
('de_DE', 'cp1252') 
already deliver ?

but only this works 

>>> locale.setlocale(locale.LC_ALL,'German_Germany.1252')
'German_Germany.1252'


But 'German_Germany.1252' you cannot get/guess from any locale.getxxxx function I think ... 


-robert


From __peter__ at web.de  Thu Nov 16 03:34:11 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Nov 2006 09:34:11 +0100
Subject: More puzzling behavior while subclassing datetime
References: <1163659104.321150.322650@e3g2000cwe.googlegroups.com>
Message-ID: <ejh7pa$7ih$00$1@news.t-online.com>

insyte at gmail.com wrote:

> With assistance from Gabriel and Frederik (and a few old threads in
> c.l.p.) I've been making headway on my specialized datetime class.  Now
> I'm puzzled by behavior I didn't expect while attempting to use some of
> the alternate datetime constructors.  Specifically, it appears if I
> call GeneralizedTime.now() it calls the __new__ method of my class but
> treats keyword arguments as if they were positional.
> 
> My class:
> 
> class GeneralizedTime(datetime):
>     def __new__(cls, time=None, *args, **kwargs):
>         print time, args, kwargs
>         if isinstance(time, str):
>             timeValues, tzOffset = cls.stringToTimeTuple(time)
>             return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
> **timeValues)
>         elif isinstance(time, datetime):
>             timeValues = time.timetuple()[:6]
>             tzOffset = time.utcoffset()
>             return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
> *timeValues)
>         elif time is None:
>             print "Still gotta figure out now to do this one..."
>         else:
>             raise Invalidtime(time)
>     @staticmethod
>     def stringToTimeTuple(timeString):
>          ... regex that parses timeString ...
> 
>>>> GeneralizedTime.today()
> 2006 (11, 16, 0, 35, 18, 747275, None) {}
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "gentime.py", line 106, in __new__
>      raise InvalidTime(time)
> gentime.InvalidTime: 2006
> 
> So it appears the time tuple is being passed to
> GeneralizedTime.__new__, but the first value is being assigned to the
> "time" argument.
> 
> Is this a side effect of how datetime is implemented?  

Yes. Consider:

>>> def today(time=None, *args):
...     print "time = ", time, "args = ", args
...
>>> today(2006, 11, 16)
time =  2006 args =  (11, 16)

To fix the issue you'll probably have to remove the time=None parameter from
GeneralizedTime.__new__() and instead extract it from args or kwargs.

Peter



From hakonrk at fys.uio.no  Sat Nov 11 18:43:33 2006
From: hakonrk at fys.uio.no (Haakon Riiser)
Date: Sat, 11 Nov 2006 23:43:33 +0000 (UTC)
Subject: httplib continuation packets
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>
	<mailman.2112.1163284210.11739.python-list@python.org>
	<slrnelck6n.lf8.hakonrk@fox.venod.com>
	<mailman.2113.1163286222.11739.python-list@python.org>
Message-ID: <slrnelco15.m2m.hakonrk@fox.venod.com>

[Fredrik Lundh]

> Haakon Riiser wrote:
>
>> Yes, and it doesn't help.
>
> then the server is mostly likely broken beyond repair.

It's not in my power to upgrade the server, unfortunately.
Guess I'll have to use Perl.

> to see if this really is the problem, you could try moving the call to 
> self._send_output() from the end of the endheaders() method to the end 
> of the _send_request() method (around line 870 in httplib.py, at least 
> in 2.5).

Tried this, but the tcpdump still looks the same (two packets: one
with the headers, one with the body), and now it fails with

urllib2.HTTPError: HTTP Error 501: Not Implemented

Nevertheless, I'm fairly sure that the packet fragmentation is
the culprit.  It works perfectly with Perl, even when I make
no effort at all to spoof the browser (no user-agent, referer,
cookies, etc.).

-- 
 Haakon


From hg at nospam.com  Wed Nov 22 13:54:28 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 12:54:28 -0600
Subject: utf - string translation
In-Reply-To: <O319h.1989$%_2.110@newsfe19.lga>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
Message-ID: <T419h.1990$%_2.1483@newsfe19.lga>

hg wrote:
> Fredrik Lundh wrote:
>> hg wrote:
>>
>>> We noticed that len('?') != len('a')
>> sounds odd.
>>
>>>>> len('?') == len('a')
>> True
>>
>> are you perhaps using an UTF-8 editor?
>>
>> to keep your sanity, no matter what editor you're using, I recommend
>> adding a coding directive to the source file, and using *only* Unicode
>> string literals for non-ASCII text.
>>
>> or in other words, put this at the top of your file (where "utf-8" is
>> whatever your editor/system is using):
>>
>>    # -*- coding: utf-8 -*-
>>
>> and use
>>
>>    u'<text>'
>>
>> for all non-ASCII literals.
>>
>> </F>
>>
> 
> Hi,
> 
> The problem is that:
> 
> # -*- coding: utf-8 -*-
> import string
> print len('a')
> print len('?')
> 
> returns 1 then 2
> 
> and string.maketrans(str1, str2) requires that len(str1) == len(str2)
> 
> hg
> 
> 
> 
> 
> 
PS: I'm running this under Idle


From shejo284 at gmail.com  Tue Nov  7 14:37:32 2006
From: shejo284 at gmail.com (Sheldon)
Date: 7 Nov 2006 11:37:32 -0800
Subject: C wrapper
Message-ID: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>

Hi,

Can anyone give me some idea as to what this error means?

"ImportError: dynamic module does not define init function "

I am new at this and there is still a lot to learn.

Any help is appreciated,

/Sheldon



From inq1ltd at verizon.net  Fri Nov  3 10:21:05 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 03 Nov 2006 10:21:05 -0500
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <454A4E1D.8030106@vtxmail.ch>
References: <4549FA01.4090706@vtxmail.ch>
	<200611021020.31599.inq1ltd@verizon.net> <454A4E1D.8030106@vtxmail.ch>
Message-ID: <200611031021.05186.inq1ltd@verizon.net>

On Thursday 02 November 2006 14:59, Frederic 
Rentsch wrote:
> jim-on-linux wrote:
> > Frederic,
> >
> > I've been trying to get back into my package
> > in the Cheese Shop for over a year. The phone
> > company changed my e:mail address and to make
> > a long and frustrating story short I can't
> > get back into the Cheese Shop to make changes
> > to my file.
> >
> > Time is money.  At some time you have to
> > consider if it is worth it.  At least you
> > have the name of your program listed.
> >
> > I wish I could be more helpfull. I'll watch
> > the responses you get from others.
> >
> > Good Luck,
> > jim-on-linux
> >
> > http://www.inqvista.com
> >
> > On Thursday 02 November 2006 09:00, you wrote:
> >> Some time ago I had managed to upload a
> >> small package to the Cheese Shop using the
> >> data entry template. Uploading is in two
> >> steps: first the text then the package file.
> >> When I had a new version it went like this:
> >> The new text made a new page, but the new
> >> file went to the old
> >
> > snip
>
> Thanks for letting me know that I am not alone.
> Do you know of an alternative to the Cheese
> Shop?
>
> Frederic

Python registering alternatives?

Part of the mission of the Cheese Shop is to 
safeguard the name of your software. Once 
registered, no one else can use that name. That's 
been done, unless you spelled the package name 
wrong.

I read the following, and I'm not sure if you have 
tried it.

The quote below is from: 
http//:www.python.org/doc/current/dist/package-index.htm 
item #7 Registering with the Package Index.  
(11-15-2004)


"By default PyPi will list all versions of a given 
package.  To hide certain versions, the hidden 
property should be set to yes.  This must be 
edited through the web interface."

Sounds to me that you can hide what is on the site 
and submit a new version, if you set "Hidden 
property" to "yes". 

I don't know of any other place to register a 
python package with the python organization.

Good Luck,

jim-on-linux

http://www.inqvista.com









































From jstroud at mbi.ucla.edu  Wed Nov  1 04:34:17 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 01 Nov 2006 09:34:17 GMT
Subject: High level csv reader
In-Reply-To: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
Message-ID: <tSZ1h.1212$m54.534@newssvr14.news.prodigy.com>

George Sakkis wrote:
> It occured to me that most times I read a csv file, I'm often doing
> from scratch things like assigning labels to columns, mapping fields to
> the appropriate type, ignoring some fields, changing their order, etc.
> Before I go on and reinvent the wheel, is there a generic high level
> wrapper around csv.reader that does all this ?
> 
> Thanks,
> George
> 

There is a csv in the standard library. Though many of us don't mind 
answering questions like this, you can get a lot of answers quicker by 
(1) looking to see what's in the standard library and (2) using google.

http://docs.python.org/lib/module-csv.html

James


From daniel.dittmar at sap.com  Thu Nov  9 12:36:13 2006
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Thu, 09 Nov 2006 18:36:13 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.1984.1163090531.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
Message-ID: <eivoud$lpf$1@news.sap-ag.de>

Michael Hobbs wrote:
> But if the BDFL insists that it remains, why not 
> take the converse approach? That is, assume that the expression ends at 
> the colon, not at the newline. That would make this type of statement 
> possible:

I suggested something like this a while back. The answer then was that 
error messages in case of a forgotten colon would be misleading, at the 
wrong position, or both.

Today:

if a or b
     print x

File "colontest.py", line 2
     if a or b
             ^
SyntaxError: invalid syntax

Daniel


From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 22 05:18:00 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 22 Nov 2006 21:18:00 +1100
Subject: Is there a list comprehension for this?
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>
	<1164171602.525542.56750@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.22.10.17.59.870599@REMOVE.THIS.cybersource.com.au>

On Tue, 21 Nov 2006 21:00:02 -0800, John Machin wrote:

> Steven D'Aprano wrote:
> 
> [snip]
> 
>> def running_sum(dw):
>>     """Return a list of the running sums of sequence dw"""
>>     rs = [0]*len(dw)
>>     for i in range(len(dw)):
>>         rs[i] = dw[i] + rs[i-1]
> 
> Please explain to the newbies why there is no exception raised when
> rs[i-1] is executed for i == 0, and state whether you consider this is
> a Good Idea or a Filthy Trick or a Fortunate Accident.

Because rs[0-1] is just rs[-1], which fetches the LAST item of the list. I
cunningly initialised the list to all zeroes, so adding zero to the first
term doesn't change the result value.

It is a variation of the sentinel technique, where you add an extra value
to the beginning or end of a list so that you don't need to treat the
first or last item differently. In this specific case, I think it is a
combination of Good Idea and Fortunate Accident, but since the
meaning of list[-1] is both deliberate and well-documented, it is
certainly not a Filthy Trick. 


-- 
Steven.



From jm.suresh at gmail.com  Tue Nov 14 01:20:03 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 13 Nov 2006 22:20:03 -0800
Subject: to  setattr or def setProp()
Message-ID: <1163485203.560900.286430@b28g2000cwb.googlegroups.com>

I have a class for rectangle and it has two points in its __slots__ .
However, we can derive a number of properties like width, height,
centerPoint etc from these two points. Now, I want to be able to set
and get these properties directly from the instances. I can either def
__setattr__ , __getattr__  or I can define function for each property
like setWidth(), setHeight() . Which one would be faster? I would
prefer doing through __setattr__, __getattr__ because it makes the code
more readable.
However, speed is a concern I would have to do these operations in few
thousand iterations for about 50-100 rectangles.

--
Suresh



From dale at riverhall.nospam.co.uk  Wed Nov  1 16:11:08 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Wed, 01 Nov 2006 21:11:08 +0000
Subject: Providing full interaction with the run time
References: <QK%0h.135918$xA6.96534@fe16.usenetserver.com>
	<mailman.1434.1162122346.11739.python-list@python.org>
Message-ID: <M382h.49088$Yd6.6293@fe33.usenetserver.com>

Thanks for the info. I didn't know about that module. I'll take a look.

Fredrik Lundh wrote:

> Dale Strickland-Clark wrote:
> 
>> We have a system we're developing which runs as a server. It has an
>> xml-rpc interface which I've extended to provide some debugging
>> facilities. This has already proved very useful and will continue to be
>> so as the system is prepared for live deployment.
>> 
>> The debugging interface attempts to emulate the Python interactive shell.
>> You type expressions, you get an answer. You type statements, they get
>> executed.
>> 
>> The problem is these two types of input are handled differently by
>> Python. You don't seem to be able to pass statements (which includes
>> assignments) and expressions through the same calls.
>> 
>> There are three keywords that support this type of function: EXEC, EVAL
>> and COMPILE. We can ignore EXEC for this because it doesn't support
>> saving and restoring a local environment and EVAL can do it better.
> 
> huh?  both exec and eval take optional execution contexts:
> 
>      http://effbot.org/pyref/eval.htm
>      http://effbot.org/pyref/exec.htm
> 
>> Or am I going about this all wrong?
> 
> yes, you're trying to reinvent the "code" module (and badly, it seems
> ;-).  see the library reference to details, this page for some examples:
> 
>      http://www.effbot.org/librarybook/code.htm
> 
> </F>

-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk



From mail at microcorp.co.za  Sat Nov 11 01:27:49 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 11 Nov 2006 08:27:49 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net><4rk5giFrerjfU1@mid.individual.net>
	<ej2nrk$qea$2@sea.gmane.org>
Message-ID: <022001c7055a$b24c7860$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:

8<---------------------------------------------------
>  >>> color = "blue"
>  >>> if color == "red" or "green" or "yellow":
> ...     print color, "is red or green or yellow"
> ...
> blue is red or green or yellow

*grin* - this can be construed as a weakness in Python -

Even COBOL compilers in the sixties would "add in" the implied
"if color = " after each 'or', instead of bloody - mindedly thinking:

ok the first condition is not true
the second "condition" 's string is not empty,
so take the true path...

BUT -  the other way leads naturally to abominations like:

if color not equal to 'red' or 'green' or 'yellow'....

where 'green' and 'yellow' takes the "wrong" path,
as neither is equal to red, when what you wanted was:

if color not equal to 'red' and 'green' and 'yellow'...

Long live de Morgan!

In this Python simply requires you to be specific in what you want,
which is in a sense a GoodThing, seen as a BadThing by lazy programmers.

And as for the colon :   colon schmolon - its irrelevant either way,
but if the interpreter requires it, you have no choice but to type it...

Programming is basically about guessing what was in the mind of the compiler
writer.

- Hendrik




From nejucomo at gmail.com  Tue Nov 14 01:58:07 2006
From: nejucomo at gmail.com (nejucomo at gmail.com)
Date: 13 Nov 2006 22:58:07 -0800
Subject: A memory leak involving builtin/pure-python inheritance.
Message-ID: <1163487487.217023.133530@h48g2000cwc.googlegroups.com>

Hi folks,


Quick Synopsis:

A test script demonstrates a memory leak when I use pythonic extensions
of my builtin types, but if I use the builtin types themselves there is
no memory leak.

If you are interested in how builtin/pure-python inheritance interacts
with the gc, maybe you can help me fix my memory leak.


Background:

I'm creating an extension module (see [1]) which implements the LADSPA
host interface (see [2]).  A similar project appears to do the same
using pyrex (see [3]), but I have not investigated it yet.

I've discovered a memory leak and I'm fairly certain of the where
the culprit reference cycle is.  The problem is I am not sure how
to instruct the gc to handle it, even after reading about supporting
builtin containers (see [4]).


My question:

How do I correctly implement a builtin type and its pythonic extension
type such that reference cycles are detected and collected?


Details:

There are three relevant LADSPA types:

A "handle" is an audio processing module which operates on input and
output streams.

A "descriptor" describes the interface to a handle such as the types
in the I/O streams, and their names and descriptions.  A handle is the
instantiation of a particular descriptor.

A "plugin" is a container providing zero or more descriptors which can
be dynamically loaded.  (Typically a shared object library that the
LADSPA host loads at runtime.)


The python-ladspa package is designed as follows:

There is a low-level builtin extension module, called "_ladspa", and a
high-level interface module, called "ladspa".

For each of the three LADSPA types, there is an extension type in the
"_ladpsa" module, for example: "_ladspa.Descriptor".

For each extension type there is a high-level subtype in the "ladspa"
module.  So "ladspa.Handle" inherits from "_ladspa.Handle".


The reference structure of the "_ladspa" module is tree-like with
no cycles.  This is because a handle has a single reference to its
descriptor, and a descriptor has a single reference to its plugin.

However, the high-level interface introduces a reference cycle because
this makes the interface more natural, IMO.


I've created a diagram which attempts to represent the inheritance
relationships as well as the reference structure of this wrapper (see
[5]).  Let me know if you find it clarifies things or needs
improvement.


There is a test script, "memleak.py", which tests either module by
repeatedly instantiating and discarding references to handles (see
[6]).
When configured to use the "_ladspa" module, there appears to be no
memory usage growth, but if using the "ladspa" module, memory grows
linearly with the number of iterations.

If I comment out the "Descriptors" list in the "ladspa.Plugin" class
(which removes the reference cycle) then "memleak.py" runs with no
apparent memory leak.

The leak persists even if I implement traverse and clear methods for
all three builtin types, unless I've done this incorrectly.


Of course one solution is to do away with the reference cycle.  After
all
the _ladspa extension does not have the cycle and is usable.  However I
care more about a user-friendly interface (which I believe the
reference
cycle provides) and also I'm just curious.


Thanks for any help,
Nejucomo


References:
[1] http://sourceforge.net/projects/python-ladspa/
[2] http://www.ladspa.org/
[3] http://sourceforge.net/projects/dsptools/
[4] http://www.python.org/doc/2.3.5/ext/node24.html
[5]
http://python-ladspa.svn.sourceforge.net/viewvc/python-ladspa/doc/refgraph.png?revision=41&view=markup
[6]
http://python-ladspa.svn.sourceforge.net/viewvc/python-ladspa/test/memleak.py?revision=37&view=markup



From DustanGroups at gmail.com  Sat Nov  4 11:03:34 2006
From: DustanGroups at gmail.com (Dustan)
Date: 4 Nov 2006 08:03:34 -0800
Subject: disabledforeground or similar for Entry (in Tkinter)
Message-ID: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>

Back in this post, I attempted to make a label look like a button:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/a83195d3970a6851/2053cbaec1bc1f19?auth=DQAAAHkAAAAMDAWnhNnzpuKlwOKZUwAGUTtT2Ay-EAB7rCY6SnwfnDzZ98M37bZDW2Is0LrBVrr8XEgPfcuOkiUE-CrSsKbBSX-67voDUXfbATBd0eYNMClezby4EXT2fuLm6f0llJ_xMO8BfkjVho_7CZvlf_9tNGnJixTbq8zr21ODZBhouQ

Alright, I've learned my lesson - don't use a new widget; modify the
old one.

Except the Entry widget doesn't have a disabledforeground option.
Neither does the Text widget, but IDLE seems to accomplish making a
disabled Text look the same as an enabled Text in the IDLE Help
section.

No, foreground (fg) and background (bg) don't make a difference; it
still changes the color of the Entry widget upon disabling.

There must be something I'm missing here...



From rpdooling at gmail.com  Tue Nov  7 16:37:28 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 7 Nov 2006 13:37:28 -0800
Subject: sqlite query not working
In-Reply-To: <4550fa9f$0$17710$c3e8da3@news.astraweb.com>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>
	<mailman.1854.1162933832.11739.python-list@python.org>
	<4550f7a5$0$14445$c3e8da3@news.astraweb.com>
	<mailman.1855.1162934802.11739.python-list@python.org>
	<4550fa9f$0$17710$c3e8da3@news.astraweb.com>
Message-ID: <1162935448.060121.258780@m7g2000cwm.googlegroups.com>


John Salerno wrote:

>> Ah well, I'm sure there was *something* different

Are you sure that it's not you were doing SELECT before, as opposed to
INSERT?

rd



From roman.yakovenko at gmail.com  Wed Nov 29 15:14:02 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Wed, 29 Nov 2006 22:14:02 +0200
Subject: libboost, python, and dijkstra shortest path
In-Reply-To: <1164828952.285225.193680@j72g2000cwa.googlegroups.com>
References: <1164822664.826189.28760@80g2000cwy.googlegroups.com>
	<1164828952.285225.193680@j72g2000cwa.googlegroups.com>
Message-ID: <7465b6170611291214r623c7845n66a9ac33b91ad488@mail.gmail.com>

On 29 Nov 2006 11:35:52 -0800, Bytter <bytter at gmail.com> wrote:
> Ok, found the solution here: http://www.osl.iu.edu/~dgregor/bgl-python/
>
> But still cannot make anything that works... Anyone who has experience
> in this area can help me with the following code:
>
> import boost as bgl
>
> graph = bgl.Graph()
> a = graph.add_vertex()
> b = graph.add_vertex()
> e = graph.add_edge(a, b)
>
> weights = graph.edge_property_map('integer')
> weights[e] = 5
> graph.edge_properties['weight'] = weights
>
> boost.dijkstra_shortest_paths(graph, a)

You'd better ask the question on boost.python or boost-users mailing lists:
http://boost.org/more/mailing_lists.htm

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From robert.kern at gmail.com  Fri Nov 10 11:00:06 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 10 Nov 2006 10:00:06 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <17748.35935.368749.950252@montanaro.dyndns.org>
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>	<mailman.1999.1163105404.11739.python-list@python.org>	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
	<17748.35935.368749.950252@montanaro.dyndns.org>
Message-ID: <ej27mh$u05$1@sea.gmane.org>

skip at pobox.com wrote:
> P.S.  I felt I just had to tie this into the thread on profanity somehow.
> But notice that I didn't mention nazis or Hitler. ;-)

You did it just now!

-- 
Robert Kern

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



From monica.medina at ngc.com  Fri Nov  3 16:49:12 2006
From: monica.medina at ngc.com (matey)
Date: 3 Nov 2006 13:49:12 -0800
Subject: Python and SSL enabled
In-Reply-To: <6sKdnXGZ2clC-NTYnZ2dnUVZ_oKdnZ2d@comcast.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
	<bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
	<1162328451.004606.194700@m7g2000cwm.googlegroups.com>
	<IpydneCVwuGYqdXYnZ2dnUVZ_sCdnZ2d@comcast.com>
	<1162421799.262364.100190@e3g2000cwe.googlegroups.com>
	<6sKdnXGZ2clC-NTYnZ2dnUVZ_oKdnZ2d@comcast.com>
Message-ID: <1162590552.461754.276380@m7g2000cwm.googlegroups.com>

It appears my __m2crypto.so didn't get built correctly.
================================================
cengsu01:/home/mmedina/crypt/m2kcrypto/m2crypto-0.16 >python setup.py
build
/usr/local/lib/python2.3/distutils/extension.py:128: UserWarning:
Unknown Extension options: 'swig_opts'
  warnings.warn(msg)
running build
running build_py
running build_ext
building '__m2crypto' extension
swig -python -ISWIG -I/home/mmedina/crypt/openssl/openssl-0.9.8/include
-o SWIG/_m2crypto.c SWIG/_m2crypto.i
gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
-fPIC -I/home/mmedina/crypt/m2kcrypto/m2crypto-0.16/SWIG
-I/home/mmedina/crypt/openssl/openssl-0.9.8/include
-I/usr/local/include/python2.3 -c SWIG/_m2crypto.c -o
build/temp.solaris-2.9-sun4u-2.3/SWIG/_m2crypto.o -DTHREADING
In file included from /usr/local/include/python2.3/stringobject.h:10,
                 from /usr/local/include/python2.3/Python.h:83,
                 from SWIG/_m2crypto.c:13:
/opt/sfw/lib/gcc-lib/sparc-sun-solaris2.9/2.95.3/include/stdarg.h:170:
warning: redefinition of `va_list'
/usr/include/stdio.h:120: warning: `va_list' previously declared here
SWIG/_m2crypto.c:3502: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:3666: warning: function declaration isn't a prototype
SWIG/_m2crypto.c: In function `make_stack_from_der_sequence':
SWIG/_m2crypto.c:3763: warning: function declaration isn't a prototype
SWIG/_m2crypto.c: At top level:
SWIG/_m2crypto.c:4897: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:5589: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:6556: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:7689: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:8111: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:8912: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:10924: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:13654: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:15281: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:13654: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:15281: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:15302: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:15895: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:16086: warning: function declaration isn't a prototype
SWIG/_m2crypto.c:559: warning: `SWIG_Python_ConvertPacked' defined but
not used
warning: no library file corresponding to '/home/mmedina/lib' found
(skipping)
gcc -shared build/temp.solaris-2.9-sun4u-2.3/SWIG/_m2crypto.o
-L/home/mmedina/crypt/openssl/openssl-0.9.8/lib -lssl -lcrypto -o
build/lib.solaris-2.9-sun4u-2.3/M2Crypto/__m2crypto.so
Text relocation remains                         referenced
    against symbol                  offset      in file
<unknown>                           0x5c0
/home/mmedina/lib/libssl.a(s3_lib.o)
<unknown>                           0x5c4
/home/mmedina/lib/libssl.a(s3_lib.o)
<unknown>                           0x5c8
/home/mmedina/lib/libssl.a(s3_lib.o)
<unknown>                           0x5cc       /home/mmedina/li
========================================================

Not sure what is going on here.  Can it not find my libraries?

Heikki Toivonen wrote:
> matey wrote:
> > I tried to run the following simple program....
> >
> > #!/usr/local/bin/python
> >
> > import M2Crypto
> >
> > u = M2Crypto.m2urllib.URLopener()
> > u.open('http://www.yahoo.com')
> >
> > However I got the following errror:
> >
> > Traceback (most recent call last):
> >   File "test.py", line 3, in ?
> >     import M2Crypto
> >   File "/home/mmedina/python2.3/site-packages/M2Crypto/__init__.py",
> > line 14, in ?
> >     import __m2crypto
> > ImportError: ld.so.1: python: fatal: relocation error: file
> > /home/mmedina/python2.3/site-packages/M2Crypto/__m2crypto.so: symbol
> > d2i_SSL_SESSION: referenced symbol not found
> > cengsu01:/home/mmedina/scripts/python >
>
> Sorry, no idea why you are getting this.
>
> Btw, I think even the M2Crypto m2urllib is unsafe, you'd be better of
> using some of the other convenience libs libs httpslib or something.
>
> > However, I went back to INSTALL instructions for m2crytpo.  I saw I
> > forgot to run alltests.py
> >
> > I ran the alltests.py and received the following:
> >
> > Traceback (most recent call last):
> > ImportError: No module named __m2crypto
>
> Currently you need to install M2Crypto before you can run the tests.
> Next version of M2Crypto will have an option to run tests without
> installing. I'd assume if copied the sources to your own site-packages
> dir and set the PYTHONPATH environment variable this would have worked.
> Notice that you'd need to copy the *built* M2Crypto dir, not the source
> M2Crypto dir which does not include the .so file.
> 
> -- 
>   Heikki Toivonen



From fredrik at pythonware.com  Fri Nov 17 03:43:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 09:43:39 +0100
Subject: Secure Python
In-Reply-To: <ejjs53$m2b$1@kohl.informatik.uni-bremen.de>
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>	<mailman.319.1163751579.32031.python-list@python.org>
	<ejjs53$m2b$1@kohl.informatik.uni-bremen.de>
Message-ID: <ejjsnr$b2v$1@sea.gmane.org>

Stephan Kuhagen wrote:

> Never heard about it, maybe it's worth a look for the OP.

$ more Misc/HISTORY

   ...

   What's New in Python 2.3 alpha 2?
   =================================

   *Release date: 19-Feb-2003*

   ...

   - Bastion.py and rexec.py are disabled.  These modules are not safe in
     Python 2.2 or 2.3.

historical references:

http://effbot.org/librarybook/rexec.htm
http://effbot.org/librarybook/bastion.htm

</F>



From david at boddie.org.uk  Mon Nov  6 11:58:57 2006
From: david at boddie.org.uk (David Boddie)
Date: 6 Nov 2006 08:58:57 -0800
Subject: Really strange behavior
References: <pan.2006.11.04.12.02.26.532144@yahoo.it>
	<Naj*BA9ur@news.chiark.greenend.org.uk>
Message-ID: <1162832336.928797.235190@h48g2000cwc.googlegroups.com>

Sion Arrowsmith wrote:

> I don't know if this is the problem or not (knowing neither Qt nor
> Twisted), but creWin() creates a window (or two) then throws it
> (them?) away on returning to main() (I assume you've chopped
> off the bit where main() is actually called). So it's not too
> surprising your window doesn't show: by the time you get to
> running anything, you don't have a window object to show.

It seems to me that your analysis is correct. The first example
works as expected because MainWindow is still in scope when
the reactor is run.

def main():
     app = QtGui.QApplication(sys.argv)
     qt4reactor.install(app)
     MainWindow = QtGui.QMainWindow()
     win = Window(MainWindow)
     MainWindow.show()
     from twisted.internet import reactor
     reactor.run()

However, in the second example, MainWindow is created as a local
variable inside creWin() and is deleted when that function returns.

def creWin():
     MainWindow = QtGui.QMainWindow()
     win = Window(MainWindow)
     MainWindow.show()
 def main():
     app = creApp()
     creWin()
     from twisted.internet import reactor
     reactor.run()

By the time the reactor runs, there's no window (open or otherwise)
so the application will never exit the Qt event loop (or whatever
actually runs when Twisted is involved).

> (Unless a Qt application object is a discoverable global and
> windows inject a reference to themselves into it.)

Well, you can access the application's instance, once it's been set
up, via the qApp global variable in the PyQt4.QtGui module. However,
you can't take advantage of Qt's parent-based object ownership
mechanism to get round this issue with local variables because
widgets need to be given QWidget parents, and QApplication is not a
QWidget subclass.

The original poster should either use a global MainWindow variable or
encapsulate the functions in a class.

David



From DustanGroups at gmail.com  Sat Nov 11 21:19:36 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 18:19:36 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2126.1163296784.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2126.1163296784.11739.python-list@python.org>
Message-ID: <1163297976.786873.124350@m73g2000cwd.googlegroups.com>


Robert Kern wrote:
> Dustan wrote:
> > Fredrik Lundh wrote:
>
> >> if you care about writing robust code, why not just use a for-loop,
> >> and the list extend method?
> >
> > Because I'm embedding this expression in a list comprehension (as I
> > stated in my original post), and last time I checked, it's not possible
> > to treat a for-loop as an expression (which is what a list
> > comprehension requires).
>
> As with all such things, you stick the implementation in a well-named function
> and simply call the function everywhere. The implementation never needs to be a
> one-liner expression.

It's already in a function, but in order to convert the reduce function
into a for-loop that I can use as an expression, I would have to create
another independent function, which would make that code more cluttered
than it already is.

Unless you're saying to perform the list comprehension manually. That
would be two for-loops I use in the list comprehension, plus another
one to take place of the reduce function. Sure, that spreads out each
individual step a little more, but it also makes it more difficult to
understand what the overall goal of the code is (I'm going for
readability as well as easy maintenance here).

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



From DustanGroups at gmail.com  Sat Nov 11 17:50:43 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 14:50:43 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2111.1163283905.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
Message-ID: <1163285443.536672.289940@m73g2000cwd.googlegroups.com>

Fredrik Lundh wrote:
> Dustan wrote:
>
> > What's an accumulation loop, and how would I convert this code so it's
> > compatible with the future 3.0
>
> the release of Python 3.0 is far away, and nobody knows how it's going
> to look.  trying to be future-compatible at this time is a major waste
> of time and (not quite as wasteful as reopening yet another old "let's
> make some pointless change to the language" thread, but almost).
>
> surely you must have something better to do with your time ?
>
> </F>

It's always nice to know there are such good-natured people ready to
help on this group. Anyway, I figured out a way to get the builtin
function 'sum' to work as I need:
sum([[1,2,3],[4,5,6],[7,8,9]],  [])

On an unrelated note, can anyone explain this unpredictable behavior on
IDLE? I swear I never hit ctrl-c...
==============================
>>> help(sum)
Help on built-in function sum in module __builtin__:

sum(...)
    sum(sequence, start=0) -> value

    Returns the sum of a sequence of numbers (NOT strings) plus the
value
    of parameter 'start'.  When the sequence is empty, returns start.
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    help(sum)
  File "C:\Python25\lib\site.py", line 346, in __call__
    return pydoc.help(*args, **kwds)
  File "C:\Python25\lib\pydoc.py", line 1642, in __call__
    self.help(request)
  File "C:\Python25\lib\pydoc.py", line 1687, in help
    self.output.write('\n')
  File "C:\Python25\lib\idlelib\PyShell.py", line 1246, in write
    self.shell.write(s, self.tags)
  File "C:\Python25\lib\idlelib\PyShell.py", line 1235, in write
    raise KeyboardInterrupt
KeyboardInterrupt
==============================



From tim at tdw.net  Thu Nov 23 10:04:20 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 23 Nov 2006 15:04:20 +0000
Subject: "10, 20, 30" to [10, 20, 30]
In-Reply-To: <G58389881.350.1535.1@mxextra>
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
	<G58379679.47.1334.1@mxextra>
	<9afea2ac0611230335r7c987fcdw9918ef55746afe96@mail.gmail.com>
	<G58389881.350.1535.1@mxextra>
Message-ID: <9afea2ac0611230704t536e7631w80a27ee30bc7a2d@mail.gmail.com>

On 23/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Tim Williams wrote:
> >>>>
>
> and the use of a list comprehension is pretty silly to, given that you want
> to apply the same *function* to all items, and don't really need to look
> it up for every item:
>
>     map(int,  s.split(','))

Haha, thanks Frederic,  I wondered how long it would take for a reply
from you :)

"Silly" though ??

Tim :)


From antonioskatsikadamos at yahoo.com  Wed Nov  8 09:26:17 2006
From: antonioskatsikadamos at yahoo.com (Antonios Katsikadamos)
Date: Wed, 8 Nov 2006 06:26:17 -0800 (PST)
Subject: python Error: IndentationError: expected an indented block
Message-ID: <20061108142618.77660.qmail@web58114.mail.re3.yahoo.com>

hi all. I am using python 2.4. I have to run an older python code and when i run it i get the following message

IndentationError: expected an indented block.

1)what does this mean?
2)how can i overcome this problem


Thanks for any advice.

kind regards,

Antonios
 
---------------------------------
Sponsored Link

Free Uniden 5.8GHz Phone System with Packet8 Internet Phone Service
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From dlenski at gmail.com  Wed Nov 15 19:46:14 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 15 Nov 2006 16:46:14 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <1163637974.453889.17100@h54g2000cwb.googlegroups.com>

walterbyrd wrote:
> Some think it will.
>
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
>
> IMO: it won't make much difference. But I don't really know.

I don't think so.  Java and Python don't really belong to the same
"class" of programming languages:

C++, Java: strongly typed, statically typed object-oriented programming
languages... minimal runtime means that these languages can be compiled
to native executables easily (yes, Java can now with things like GCJ
and appropriate libraries)

Python, Perl, Ruby: dynamically typed object-oriented programming
languages... lots of runtime intelligence allows you to do things like
create a new class or function at runtime, or look up a symbol based on
a string of its name, or execute a string containing source code (these
things make the language more flexible but pretty hard to compile to
native code without embedding an interpreter)

The "mindset" required to program effectively in C++ or Java is very
different from that required to program effectively in Python or Perl,
in a way that's quite separate from the syntactical distinctions
between these languages... I think most programmers settle comfortably
into one mindset that fits best with the tasks they do, and try not to
move outside of it.

The ranks of C++ programmers have already been diminished by many of
them jumping to Java, since it offers less complex syntax and better
cross-platform support.  I expect that GPL'ed Java will accelerate the
decline of C++.  But I don't see Java competing directly with Python...

Dan



From paul.keating at nibc.com  Fri Nov 10 10:13:33 2006
From: paul.keating at nibc.com (paul.keating at nibc.com)
Date: 10 Nov 2006 07:13:33 -0800
Subject: newbee I have an object how to check what's his class?
In-Reply-To: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
Message-ID: <1163171613.040825.78290@m73g2000cwd.googlegroups.com>

This doesn't answer your whole post because it asked a lot of
questions. But as to finding out whether something is an instance of a
class:

class X(object):
      # ... defined as in your post

>>> x = X('Fred')
>>> x
class X contains:
>>> type(x) is X
True
>>> isinstance(x,X)
True
>>> x.__class__.__name__
'X'

Now for subclasses:

class Y(X):
    extrastuffinY = 1

>>> y = Y('Joe')
>>> type(y) is X
False
>>> isinstance(y,X)
True


consternation:

> I can't find  neither in tutorial nor with google It's all about
> isinstance,  or  __class__.
> How to test that an object is an instance of my X class??



From deets at nospam.web.de  Thu Nov  2 06:27:54 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Nov 2006 12:27:54 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <4qu31oFobjovU1@uni-berlin.de>

Sybren Stuvel schrieb:
> elderic enlightened us with:
>> are there other ways than the ones below to check for <type
>> 'function'> in a python script?
> 
> First of all, why would you want to? If you want to call the object
> as a function, just do so. Handle the exception that is raised when
> it's raised.

That's an advice I've heard a few times to often.

I'm totally buying duck-typing. Yet the advice of simply calling a 
function to determine that it is one isn't sound in a lot of cases where 
you want to use it as callback later on.

E.g. the turbogears DataGrid can get either a string or a callable 
passed as column-data-provider. But which of these two options is used 
must be known at construction time, not at later calling time.

Diez


From jeremy+complangpython at jeremysanders.net  Tue Nov  7 05:34:23 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 07 Nov 2006 10:34:23 +0000
Subject: Plot pkg - Multiple Y axes?
References: <1162836527.115500.46420@i42g2000cwa.googlegroups.com>
Message-ID: <eipnff$2l2$1@gemini.csx.cam.ac.uk>

monkeyboy wrote:

> I'm searching for a plotting package that will allow multiple y axes of
> different scales. For example I'd like to overlay 4 or 5 time series
> with each series having a separate axis. Does anyone know of such a
> package?

My package veusz allows that... 

http://home.gna.org/veusz/

You can have any number of y-axes, see

http://home.gna.org/veusz/screenshots/screenshot1.png

The PyQt4 version is coming along nicely too...

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From robert.kern at gmail.com  Thu Nov  2 14:36:12 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 02 Nov 2006 11:36:12 -0800
Subject: problem with svd in numpy
In-Reply-To: <A67B3032D1498942AFF8CEAF1ADE29E3F84F6F@EX02.asurite.ad.asu.edu>
References: <A67B3032D1498942AFF8CEAF1ADE29E3F84F6F@EX02.asurite.ad.asu.edu>
Message-ID: <eidhbc$9km$1@sea.gmane.org>

Zeynep Gerek wrote:
> Hello,
> 
> I am having weird problem with svd routine in python.

numpy questions are best asked on the numpy list.

   http://www.scipy.org/Mailing_Lists

> I am comparing 
> eigenvector values from python and matlab. And they are giving different 
> values. Actually, they are same but python gives negative values of 
> these numbers.
> 
> This is my test program (I am dealing with 100x100 matrices) with the 
> array I used in matlab.

> I am not sure if svd in numpy has a problem or not. When I test this 
> matrix in matlab, eigenvector values are different, Any idea why I am 
> not getting exact results from both program?

You didn't show what code you executed in Matlab. Did you also do an SVD there, 
or did you do an eigenvalue decomposition? The two are not the same thing. Which 
did you intend to do?

In any case, it looks as if numpy_u == -matlab_u. How do numpy_vt and matlab_vt 
compare? Do they also have flipped signs? If so, then there is no problem. (u, 
vt) can be replaced with (-u, -vt). The SVD is not unique. Which one you get 
depends on the precise operations of the implementation.

-- 
Robert Kern

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



From john106henry at hotmail.com  Thu Nov 30 13:58:45 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 10:58:45 -0800
Subject: Is there an easier way to express this list slicing?
Message-ID: <1164913125.509492.54060@79g2000cws.googlegroups.com>

If I have a list of say, 10 elements and I need to slice it into
irregular size list, I would have to create a bunch of temporary
variables and then regroup them afterwords, like:

# Just for illustration. Alist can be any existing 10 element list
a_list=("",)*10
(a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
alist=(a,)
blist=(b,)
clist=(c1,c2,c3)
dlist=(d2,d3,d4,d5)

That obviously work but do I *really* have to do that?

BTW: I know you can do:
alist=a_list[0]
blist=a_list[1]
clist=a_list[2:5]
dlist=a_list[5:]

but I don't see that it's any better.

Can I say something to the effect of:

(a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work

??

I am asking this because I have a section of code that contains *lots*
of things like this.  It makes the code very unreadable.

Thanks,



From bdesth.quelquechose at free.quelquepart.fr  Thu Nov  2 15:54:48 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Nov 2006 21:54:48 +0100
Subject: scared about refrences...
In-Reply-To: <1162412436.595926.66940@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
Message-ID: <454a5672$0$3721$426a74cc@news.free.fr>

SpreadTooThin a ?crit :
> Bruno Desthuilliers wrote:
> 
>>Nick Vatamaniuc a ?crit :
>>(snip)
>>
>>>In  Python all the primitives are copied and all other entities are
>>>references.
>>
>>Plain wrong. There's no "primitives" (ie : primitive data types) in
>>Python, only objects. And they all get passed the same way.
> 
> 
> so..
> def fn(x):
>    x = x + 1
>    print x
> 
> a = 2
> fn(a)
> fn(2)
> 
> Wouldn't you say that this is being passed by value rather than by
> refrence?

It's not passed by value. when in fn(), the *local* name 'x' is bound to 
(IOW:references) the exact same object you passed to fn(). Then you 
rebind this (local) name to *another* object.

def fn((x):
   print id(x)
   x = x + 1
   print id(x)

n = 1256
print id(n)
fn(n)

def fn2(alist):
    print id(alist)
   alist.append(42)

mylist = []
print id(mylist)
fn2(mylist)
print mylist
print id(mylist)


There's nothing like "pass by value" or "pass by reference" in Python 
(and you'll notice I didn't claimed anything about this - just that the 
'argument passing scheme' was the same for all objects).

What we call "variables" in Python are name=>object bindings. When 
passing a "variable" to a function, the reference to the objet is bound 
to the name of the argument in the function's namespace. So the *name* 
is local to the function (hence rebinding the name to another objet 
doesn't impact the name=>object binding in the caller's namespace), but 
this name really refers to the same object (Python doesn't copy anything 
unless explicitely told to do so).

HTH


From jonas.esp at googlemail.com  Thu Nov 23 16:19:47 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 23 Nov 2006 13:19:47 -0800
Subject: Access to variable from external imported module
Message-ID: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>

How to access to a variable (that value is not returned) from a module
imported?
And the variable is set at the module-level.

That module is external to my program, it's from another project so I
wann't modifying it.



From john106henry at hotmail.com  Wed Nov  8 15:36:30 2006
From: john106henry at hotmail.com (John Henry)
Date: 8 Nov 2006 12:36:30 -0800
Subject: decorators
Message-ID: <1163018190.510373.123020@h54g2000cwb.googlegroups.com>

I must be very thick.  I keep reading about what decorators are and I
still don't have a good feel about it.  See, for example:

http://alex.dojotoolkit.org/?p=564

What exactly do I use decorators for?



From kloro2006 at gmail.com  Tue Nov  7 14:15:41 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Tue, 07 Nov 2006 11:15:41 -0800
Subject: object data member dumper?
Message-ID: <4550cddd$0$12104$88260bb3@free.teranews.com>

does anyone know of a utility to do a recursive dump of object data members?


-- 
Posted via a free Usenet account from http://www.teranews.com



From fredrik at pythonware.com  Sat Nov 11 02:48:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 08:48:10 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4554D010.4080408@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2gp9$1qc$1@sea.gmane.org>
	<4554D010.4080408@hobbshouse.org>
Message-ID: <ej3v7t$r81$1@sea.gmane.org>

Michael Hobbs wrote:

> Yeah, okay, I didn't read through the details of the PEP. I picked a bad 
> example to illustrate a point that is still true. The FAQ also tries to 
> argue that it's a Good Thing that join() is a string method, not a list 
> method. It also tries to argue that there's a good reason that lists are 
> different than tuples. I don't think it would surprising that many 
> Python developers don't really buy those arguments either.

nice try, troll boy.

</F>



From powernews at libero.it  Mon Nov 27 08:01:03 2006
From: powernews at libero.it (halex2000)
Date: Mon, 27 Nov 2006 13:01:03 GMT
Subject: working with files and directories
References: <7IAah.58105$uv5.416763@twister1.libero.it>
	<mailman.766.1164631069.32031.python-list@python.org>
Message-ID: <jkBah.58160$uv5.417213@twister1.libero.it>


"Thomas Ploch" <Thomas.Ploch at gmx.net> ha scritto nel messaggio 
news:mailman.766.1164631069.32031.python-list at python.org...
> Have you actually even tried to find some "documentation"?
> Have you placed a google search "python directories rename files"?
> Thomas

Actually I did it on the documentation file provided with the windows 
distribution. I took a look at 11 ("File and Directory Access") but the 
listed functions doesn't appear to be what I need. 14.1.4 should do the job, 
but was not as intuitive to find as the previous one. 




From fredrik at pythonware.com  Sat Nov 11 19:00:53 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 01:00:53 +0100
Subject: explicit self revisited
In-Reply-To: <1163288444.893136.42030@h54g2000cwb.googlegroups.com>
References: <ej5fuv$a4a$1@online.de><ej5i3k$6l3$1@sea.gmane.org>	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
Message-ID: <ej5o7i$ljb$1@sea.gmane.org>

Doug (Holton?) wrote:

>> and before anyone complains; please note that they're working through
>>
>>      http://www.effbot.org/pyfaq/design-index.htm
> 
> That site is a bunch of FUD -

the official FAQ is a bunch of FUD?  are you sure you know what FUD means?

</F>



From bumtool at gmail.com  Thu Nov 23 07:35:28 2006
From: bumtool at gmail.com (kilnhead)
Date: 23 Nov 2006 04:35:28 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
Message-ID: <1164285328.330478.95620@l12g2000cwl.googlegroups.com>

I for one like the pdf format. Nothing irks me more than help files in
multipage HTML. I want a document I can easily download and save.
Thanks for your efforts.


tleeuwenburg at gmail.com wrote:
> Greetings all,
>
> Some of you may have noticed the launch of the Python Journal a while
> back. Due to artistic differences, the journal has now been re-launched
> as The Python Papers. It is available under a Creative Commons License,
> something we felt was appropriate given its nature. Many here commented
> that this was important to them, and it is important to us also.
>
> For a fuller description of what we hope the journal to be, I re-create
> my inaugural blog posting at the end of this email, or it can be found
> online here: http://pythonpapers.cgpublisher.com/diary
>
> Some of you had a number of specific points to raise, which I can now
> answer properly since launching under our own banner.
>
> 1.) It takes too many clicks to download.
> A) We know, but it's like that to save our server. We will be
> publishing to a number of online archives, back-issues may be
> back-linkable from those.
>
> 2.) Is it free?
> A) Yes, as in beer and as in freedom. Creative Commons 2.5
> Noncommercial, attribution, share-alike.
>
> 3.) Can I have an HTML version?
> A) No, we like it pretty.
>
> 4.) Why not try (insert favourite thing here)
> A) We will. Thanks for the fish.
>
> " Volume 1, Edition 1 makes history
>
> Welcome to The Python Papers. This journal, small though it is,
> represents the careful efforts of a small group of Python enthusiasts
> who are keen to form a better community in which developers may work.
>
> As Editor-In-Chief, my role is manifold, but my goals are to improve
> the level of connectedness of Python developers, and in so doing
> improve my own developer experience.
>
> The entire editorial board has put time into making this publication
> something which will hopefully lead to a buildup of momentum, fuelled
> by the enthusiastic involvement of others who find Python as exciting
> as we do.
>
> The current issue contains one academic, peer-reviewed article, one
> industry article, and a list of events coming up in Melbourne,
> Australia. We would like to expand this list significantly. We offer
> our services in organising, collating and reviewing submitted content
> such that Python developers around the world may participate in the
> creation of something bigger than all of us, for the benefit of all of
> us. It may be a small journal, a little thing really, but all are
> welcome, and we look forward to getting to know our readers through the
> written word.
>
> Please download the first edition, and consider both what it is and
> what it might be.
>
> For those of you looking to publish an academic paper as a part of
> coursework or for interest's sake alone, we can offer a formal review
> process which will meet those guidelines while preserving the goals of
> freedom of information and community spirit.
>
> Those who are using Python in their work may like to consider using the
> journal as a means of expressing successes or frustrations with either
> the language itself or specific applications. We may be able to offer
> code reviews and style guides, and would be happy to hear about and
> help propagate news of what is happening so that everyone can take an
> interest.
>
> For those who would like a reliable source of information, The Python
> Papers presents a unique and current view into the state of Python at
> large.
> 
> To all of you, welcome!
> Cheers,
> -Tennessee (Editor-In-Chief)"



From roy at panix.com  Wed Nov  1 23:14:56 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 01 Nov 2006 23:14:56 -0500
Subject: Regular Expression for a string
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
Message-ID: <roy-D7B2EF.23145601112006@reader2.panix.com>

In article <1162440285.962155.325540 at f16g2000cwb.googlegroups.com>,
 "Teja" <tejovathi.p at gmail.com> wrote:

> HI all,
> 
> I need to write a regular experssion for a string which satisfies the
> following a criteria :
> 
> 1) it should start with an alphabet

I assume you mean, "It should start with a letter"?

> 2) it can contain alphabets/digits/_ from second character
> 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional

How about:  ^[a-zA-Z][a-zA-Z0-9_]*[a-z0-9]?$

Probably many variations on that theme will also work.


From steve at holdenweb.com  Tue Nov 14 05:55:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Nov 2006 10:55:24 +0000
Subject: Is python for me?
In-Reply-To: <pan.2006.11.14.09.55.42.130942@internode.on.net>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<pan.2006.11.14.09.55.42.130942@internode.on.net>
Message-ID: <ejc791$lu6$1@sea.gmane.org>

Mark Woodward wrote:
> On Mon, 13 Nov 2006 09:11:13 -0800, lennart wrote:
> 
>> Hi,
>>
>> I'm planning to learn a language for 'client' software. Until now, i
>> 'speak' only some web based languages, like php. As a kid i programmed
>> in Basic (CP/M, good old days :'-) ) Now i want to start to learn a
>> (for me) new computer language.
>>
>> I like Python. Its free, easy to learn and some favorite programs of my
>> are written in Python / can understand Python (like OpenOffice) etc.
>>
>> But I'm not a full-time programmer. I know, that I've only time &
>> possibility to learn one (= 1) language good. So i ask myself is python
>> the language I'm looking for?
> ....
> 
> I've been hesitant to write this in the past but seems like a good time.
> 
> I'm at the same stage, but (and this is NOT a troll) I'm tossing up
> between Python and Ruby. I know this has been discussed numerous times but
> I'd like to come at it from a different angle. 
> 
> I've been 'playing' with both languages and to be honest it's a case of 6
> of one, half a dozen of the other. If I'm using python I 'think' python
> and if I'm using Ruby I 'think' ruby (if that makes sense). Ie I don't
> find I'm more productive in one over the other to any great extent (pretty
> unproductive in both ATM to be honest ;-)) .
> 
> In the foreseeable future I suspect I'll stick with one and just use it
> for things I personally will use/need. But (and here's where I finally get
> to a question) I use Linux, I love the whole idea of open source and
> contributing in some way. So if I ever get to the stage where I can give
> something back is one preferred over the other? I would have thought no
> but I read on the Ubuntu site somewhere that they prefer contributions
> written in Python/ pyGTK?? Is this just a 'preference' or because python
> is installed by default? (whereas Ruby isn't)? Is it just Ubuntu or Linux
> distros in general?
> 
> I hope you can see where I'm coming from here. I don't want to start a
> Python/Ruby flame war. That's not the question. The question is "is one
> preferred over the other when contributing software and is this just a
> particular distros preference"?
> 
Ubuntu is pretty much a Python-oriented distribution. A lot of people 
like it because you always get a fairly up-to-date Python with lots of 
extras available.

I don't know that much about Ruby, but the best approach to software 
development has always been to choose the best language for solving the 
problem, so you seem to be doing OK.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From timothy at open-networks.net  Thu Nov 16 07:07:41 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 16 Nov 2006 22:07:41 +1000
Subject: Secure Python
In-Reply-To: <mailman.248.1163677812.32031.python-list@python.org>
References: <mailman.219.1163646863.32031.python-list@python.org>	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>	<455c1665@quokka.wn.com.au>	<mailman.228.1163664606.32031.python-list@python.org>	<455c4d07@quokka.wn.com.au>
	<mailman.248.1163677812.32031.python-list@python.org>
Message-ID: <455c5410@quokka.wn.com.au>

Fredrik Lundh wrote:
> timmy wrote:
> 
>> maybe you should google "linux kernel limit" and you can prevent any 
>> user/process maxing out your system
> 
> 
> one would have thought that the phrase "apart from OS-specific stuff" 
> might have meant that the OP wasn't asking for Linux-specific solutions.
> 
> </F>
> 

sorry i didn't see that.
cpu and memory limiting aren't specific to linux though, any NT system 
can also do it.
the only effective way to prevent someone with  access to a compiler 
from performing a local dos on your system is use each os's resource 
controls. there's no cross platform way to do this, since every system 
has vastly different methods of memory and cpu time handling.
This looks like a case where he will just have to accept this as a trade 
off (security is always a trade off)


From ronrsr at gmail.com  Tue Nov 28 00:34:42 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 21:34:42 -0800
Subject: splitting a long string into a list
Message-ID: <1164692082.272978.66720@14g2000cws.googlegroups.com>

I have a single long string - I'd like to split it into a list of
unique keywords. Sadly, the database wasn't designed to do this, so I
must do this in Python - I'm having some trouble using the .split()
function, it doesn't seem to do what I want it to - any ideas?

thanks very much for your help.

r-sr-


longstring = 'Agricultural subsidies; Foreign aidAgriculture;
Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
Childhood Development, Birth Defects; Toxic ChemicalsAntibiotics,
AnimalsAgricultural Subsidies, Global TradeAgricultural
SubsidiesBiodiversityCitizen ActivismCommunity
GardensCooperativesDietingAgriculture, CottonAgriculture, Global
TradePesticides, MonsantoAgriculture, SeedCoffee, HungerPollution,
Water, FeedlotsFood PricesAgriculture, WorkersAnimal Feed, Corn,
PesticidesAquacultureChemical
WarfareCompostDebtConsumerismFearPesticides, US, Childhood Development,
Birth DefectsCorporate Reform,  Personhood (Dem. Book)Corporate Reform,
 Personhood, Farming (Dem. Book)Crime Rates, Legislation,
EducationDebt, Credit CardsDemocracyPopulation, WorldIncomeDemocracy,
Corporate Personhood, Porter Township (Dem. Book)Disaster
ReliefDwellings, SlumsEconomics, MexicoEconomy, LocalEducation,
ProtestsEndangered Habitat, RainforestEndangered SpeciesEndangered
Species, Extinctionantibiotics, livestockAgricultural subsidies;
Foreign aid;Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals;Antibiotics, Animals;Agricultural Subsidies, Global
Trade;Agricultural Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agriculture, Cotton;Agriculture, Global
Trade;Pesticides, Monsanto;Agriculture, Seed;Coffee, Hunger;Pollution,
Water, Feedlots;Food Prices;Agriculture, Workers;Animal Feed, Corn,
Pesticides;Aquaculture;Chemical
Warfare;Compost;Debt;Consumerism;Fear;Pesticides, US, Childhood
Development, Birth Defects;Corporate Reform,  Personhood (Dem.
Book);Corporate Reform,  Personhood, Farming (Dem. Book);Crime Rates,
Legislation, Education;Debt, Credit Cards;Democracy;Population,
World;Income;Democracy, Corporate Personhood, Porter Township (Dem.
Book);Disaster Relief;Dwellings, Slums;Economics, Mexico;Economy,
Local;Education, Protests;Endangered Habitat, Rainforest;Endangered
Species;Endangered Species, Extinction;antibiotics,
livestock;Pesticides, Water;Environment, Environmentalist;Food, Hunger,
Agriculture, Aid, World, Development;Agriculture, Cotton
Trade;Agriculture, Cotton, Africa;Environment, Energy;Fair Trade (Dem.
Book);Farmland, Sprawl;Fast Food, Globalization, Mapping;depression,
mental illness, mood disorders;Economic Democracy, Corporate
Personhood;Brazil, citizen activism, hope, inspiration, labor
issues;citizen activism, advice, hope;Pharmaceuticals, Medicine,
Drugs;Community Investing;Environment, Consumer Waste Reduction,
Consumer Behavior and Taxes;Hunger, US, Poverty;FERTILITY,
Women;Agricultural subsidies; Foreign aid;Agriculture; Sustainable
Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
Development, Birth Defects; Toxic Chemicals;Antibiotics,
Animals;Agricultural Subsidies, Global Trade;Agricultural
Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agricultural subsidies; Foreign
aid;Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals;Antibiotics, Animals;Agricultural Subsidies, Global
Trade;Agricultural Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agriculture, Cotton;Agriculture, Global
Trade;Pesticides, Monsanto;Agriculture, Seed;Coffee, Hunger;Pollution,
Water, Feedlots;Food Prices;Agriculture, Workers;Animal Feed, Corn,
Pesticides;Aquaculture;Chemical
Warfare;Compost;Debt;Consumerism;Fear;Pesticides, US, Childhood
Development, Birth Defects;Corporate Reform,  Personhood (Dem.
Book);Corporate Reform,  Personhood, Farming (Dem. Book);Crime Rates,
Legislation, Education;Debt, Credit Cards;'



From walterbyrd at iname.com  Wed Nov 15 10:58:05 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 07:58:05 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.182.1163566134.32031.python-list@python.org>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<mailman.182.1163566134.32031.python-list@python.org>
Message-ID: <1163606284.985813.294550@f16g2000cwb.googlegroups.com>


Michael Torrie wrote:

> Absolutely false.  Most of my standalone, command-line scripts for
> manipulating my unix users in LDAP are written in PHP, although we're
> rewriting them in python.
>

I would say that you are one of very few who use PHP for sys-admin
tasks - and even you have switched to Python. In general, it does not
seem to me that PHP has caught on as a sys-admin language.

However, as sys-admin scripting langanges go, I would also say that
Python is far less popular than butt-ugly Perl. Again - just based on
what I've seen.



From daniel.dittmar at sap.com  Fri Nov  3 12:34:57 2006
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Fri, 03 Nov 2006 18:34:57 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eiftcg$968$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net> <eifmgv$r37$1@news.sap-ag.de>
	<eiftcg$968$1@news.albasani.net>
Message-ID: <eifuk1$2ks$1@news.sap-ag.de>

robert wrote:
> (IPython is only a special "python network terminal" as already said.)

Sorry, I thought of IronPython, the .NET variant.

> Does Jython really eliminate the GIL? What happens when different 

Yes.

> threads alter/read a dict concurrently - the basic operation in python, 
> which is usually not protected by locks. Does Jython use a dict data 
> type (and other collection types) which lock during _each_ access? in 
> case - that may be very expensive.

True, though Java synchronization has gotten better and better. Still, 
Sun introduced non locking hash tables, so it was a problem. It'd be 
interesting to know which kind of dict is used in Jython for attribute 
access.
> 
> garbage is collected earliest, when the refcount went to 0. If it ever 
> went to 0, no one will ever use such object again. Thus GC should not be 
> different at all.

Since Python 2.?, there's a mark-and-sweep garbage collection in 
addition to the reference counting scheme. This was put into Python to 
be able to reclaim object cycles.


Daniel


From robert.kern at gmail.com  Mon Nov 13 22:36:51 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 13 Nov 2006 21:36:51 -0600
Subject: Test-driven development of random algorithms
In-Reply-To: <pan.2006.11.14.03.25.53.274332@REMOVEME.cybersource.com.au>
References: <pan.2006.11.14.03.25.53.274332@REMOVEME.cybersource.com.au>
Message-ID: <ejbdkv$ftl$1@sea.gmane.org>

Steven D'Aprano wrote:
> I'm working on some functions that, essentially, return randomly generated
> strings. Here's a basic example:
> 
> def rstr():
>     """Return a random string based on a pseudo 
>     normally-distributed random number.
>     """
>     x = 0.0
>     for i in range(12):
>         x += random.random()
>     return str(int(x)+6))
> 
> I want to do test-driven development. What should I do? Generally, any
> test I do of the form
> 
> assert rst() == '1'
> 
> will fail more often than not (about 85% of the time, by my estimate). An
> easy work around would be to do this:
> 
> assert rstr() in [str(n) for n in range(-6, 6)]
> 
> but (1) that doesn't scale very well (what if rstr() could return one of
> a billion different strings?) and (2) there could be bugs which only show
> up probabilistically, e.g. if I've got the algorithm wrong, rstr() might
> return '6' once in a while.
> 
> Does anyone have generic advice for the testing and development of this
> sort of function?

"Design for Testability". In library code, never call the functions in the
random module. Always take as an argument a random.Random instance. When
testing, you can seed your own Random instance and all of your numbers will be
the same for every test run.

This kind of design is A Good Thing(TM) outside of unit tests, too. They aren't
the only places where one might want to have full control over the sequence of
random numbers.

-- 
Robert Kern

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



From sjmachin at lexicon.net  Sun Nov 26 19:07:50 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 16:07:50 -0800
Subject: Generating header information using ElementTree
In-Reply-To: <1164583078.233238.227010@45g2000cws.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
	<4suidqF10rlh1U1@mid.uni-berlin.de>
	<1164583078.233238.227010@45g2000cws.googlegroups.com>
Message-ID: <1164586070.655741.256800@h54g2000cwb.googlegroups.com>


Craig wrote:

> Great.  Got that sorted.  The problem I have now is that some of the
> XML data is not copied across to the file when I have the text
> information included.  The number of characters that is lost is equal
> to the number of characters that is in the block of text I entered
> before.  The code I am using is:
>
> def WriteXMLRecord ( record, XMLFileBaseName, root):
> RecordName = SubElement(root, "Log")
>     #iterate through all the fields in the record
>     for key in record:
>         # write the key and its data
>         test = SubElement(RecordName, key)
>         test.text = str(record[key])
>     tree = ElementTree(root)
>     tree.write(XMLFileBaseName)

I'm guessing, based on reading the docs for the write method, that you
should be using the file handle, rather than the file name, if the file
is already opened. So (1) change the name of the 2nd arg to
XMLFileHandle or somesuch, and in the caller, use outFile (the handle)
instead of "record.xml".

>
> def main():
>     outFile = open("record.xml", 'w')
>     outFile.write("""<?xml version=\"1.0\"?>
> <?xml-stylesheet type=\"text/xsl\" href=\"test.xsl\"?>
> <!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n\n""")
>
>     root = Element("Log")
>     WriteXMLRecord(data1, "record.xml", root)
>     WriteXMLRecord(data2, "record.xml", root)
>     WriteXMLRecord(data3, "record.xml", root)
>     outFile.close()
> 
HTH,
John



From svein at seldal dot com  Thu Nov  9 08:44:25 2006
From: svein at seldal dot com (Svein Seldal)
Date: Thu, 09 Nov 2006 14:44:25 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <eiva35$v3m$1@news.albasani.net>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
Message-ID: <7vCdnSqE260grc7YRVnzvQ@telenor.com>

robert wrote:
> PyGILState_Ensure/Release guarantees to establish the GIL - even if it 
> was already held (useful if you deal with complex call 
> ordering/dependencies)

I understand this to mean that I dont need to explicitly lock the GIL 
(with PyEval_AcquireLock() or PyEval_AcquireThread()).

Well I cant figure out the PyGILState_Ensure() because if I only use 
this function to establish the GIL, when calling python, python will 
shortly after crash with "Fatal Python error: ceval: tstate mix-up". 
This happens consistently when the main app and the extra thread has 
called python and both are busy executing python code.

> PyObject_CallObject(...)     calls Python code. Thus the interpreter 
> will switch and do as usuall during that.

BTW What do you mean by switch?

> In your/C/system... code  you are responsible to release the GIL or not 
> to enable other Python threads (and prevent from deadlocks) Usually 
> you'd do this * if you do time consuming C/system stuff
> * or if the code can possibly renter Python through the system (e.g. 
> when you call a Windows function which itself can create Windows 
> messages to be routed back into Python message handlers)

The main problem is that not done this way, it's the other way around. 
My main C app will call a python function which will be a lengthy time 
consuming process.

The main C app will call python and it will never return from 
PyObject_CallObject(...), while the extra thread should call a py 
function to deliver occational messages into C.


Svein


From paul at boddie.org.uk  Tue Nov  7 05:57:15 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 7 Nov 2006 02:57:15 -0800
Subject: Unicode/ascii encoding nightmare
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
	<1162853677.881233.76940@m7g2000cwm.googlegroups.com>
Message-ID: <1162897035.238736.129220@k70g2000cwa.googlegroups.com>

Thomas W wrote:
> Ok, I've cleaned up my code abit and it seems as if I've
> encoded/decoded myself into a corner ;-).

Yes, you may encounter situations where you have some string, you
"decode" it (ie. convert it to Unicode) using one character encoding,
but then you later "encode" it (ie. convert it back to a plain string)
using a different character encoding. This isn't a problem on its own,
but if you then take that plain string and attempt to convert it to
Unicode again, using the same input encoding as before, you'll be
misinterpreting the contents of the string.

This "round tripping" of character data is typical of Web applications:
you emit a Web page in one encoding, the fields in the forms are
represented in that encoding, and upon form submission you receive this
data. If you then process the form data using a different encoding,
you're misinterpreting what you previously emitted, and when you emit
this data again, you compound the error.

> My understanding of unicode has room for improvement, that's for sure. I got some pointers
> and initial code-cleanup seem to have removed some of the strange results I got, which
> several of you also pointed out.

Converting to Unicode for processing is a "best practice" that you seem
to have adopted, but it's vital that you use character encodings
consistently. One trick, that can be used to mitigate situations where
you have less control over the encoding of data given to you, is to
attempt to convert to Unicode using an encoding that is "conservative"
with regard to acceptable combinations of byte sequences, such as
UTF-8; if such a conversion fails, it's quite possible that another
encoding applies, such as ISO-8859-1, and you can try that. Since
ISO-8859-1 is a "liberal"  encoding, in the sense that any byte value
or combination of byte values is acceptable, it should only be used as
a last resort.

However, it's best to have a high level of control over character
encodings rather than using tricks to avoid considering representation
issues carefully.

Paul



From johnjsal at NOSPAMgmail.com  Thu Nov  2 22:07:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 02 Nov 2006 22:07:10 -0500
Subject: creating new objects with references to them
In-Reply-To: <GTq2h.1345$0r.1218@newsread1.news.pas.earthlink.net>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
	<1162486298.863881.261790@h54g2000cwb.googlegroups.com>
	<GTq2h.1345$0r.1218@newsread1.news.pas.earthlink.net>
Message-ID: <454ab276$0$17722$c3e8da3@news.astraweb.com>

Dennis Lee Bieber wrote:

> 	I'd keep it -- since the operations to load/save from the database
> should probably be methods of that class -- or, at least, the mapping
> from instance attributes to the SQL might be...

Well, I'm sort of working on a method that just involves a bunch of 
functions doing all the work. Maybe not ideal. I think I need to take 
your advice about stepping back and looking at it again.


From p.lavarre at ieee.org  Fri Nov 10 09:14:43 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 06:14:43 -0800
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
Message-ID: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>

> Subject: announce: FAQs suggested ...
> http://effbot.org/pyfaq/suggest.htm has new FAQ's ...
> FAQ: How do I calculate what quoted strings and numbers mean?
>
> A: eval(source, {'builtins': {}}) works, without also accidentally
> accepting OS commands as input.
>
> Note: Eval might surprise you if you mistype this idiom as: eval(source, {}).
>
> Note: This idiom makes sense of ordinary Python literals (such as 010, 0x8,
> 8.125e+0, and "\x45ight"). This idiom also correctly interprets simple
> literal expressions, such as 64**0.5.

That suggested FAQ is misleadingly incorrect as stated - we need help
rewording it.

/F correctly commented:
"eval" is never a good choice if you cannot trust the source; it's
trivial to do various denial-of-service attacks. See
http://effbot.org/zone/librarybook-core-eval.htm

Correspondingly, newbie me, I actually did copy the eval(source,
{'builtins': {}}) idiom into some code from that page without noticing
the comments re the cost of evaluating literal expressions like 'a' *
(10**9) , abuses of __subclass__ and mro(), etc.

But those objections miss the point.  Having had those troubles
explained to me now, I'm still leaving my code unchanged - it still
does what I mean.  That is,

eval(source, {'builtins': {}}) works enough like an evaluator of
literals to let you duck the work of writing that evaluator until you
need it.  Yagni.

That's useful, and likely an FAQ.  Anybody out there able to say
concisely what we really mean to say here?

Thanks in advance, Pat LaVarre



From e0427417 at student.tuwien.ac.at  Mon Nov 20 10:43:08 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 16:43:08 +0100
Subject: a few extensions for the itertools
In-Reply-To: <Xns98815B738B64Cduncanbooth@127.0.0.1>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
	<Xns98815B738B64Cduncanbooth@127.0.0.1>
Message-ID: <4561ccac$0$11610$3b214f66@tunews.univie.ac.at>

Duncan Booth wrote:
> Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> wrote:
> 
>> No, because the builtin sum want's a list. This can also handle any
>> kind of iterable, so this would work:
>>
>> isum(i**2 for i in xrange(100))
>>
>> sum would need firs the whole list to be generated:
>>
>> sum([i**2 for i in xrange(100)])
> 
> Really?
> 
>>>> sum(i**2 for i in xrange(20000000))
> 2666666466666670000000L
> 
> seems to work fine, and judging by the memory usage it pretty obviously 
> doesn't create an intermediate list.

Very strange. I must have made some strange error. I tried that (more than once) and it failed. 
Don't know why. But now it works here, too. What did I write, when it failed?


From dananrg at yahoo.com  Wed Nov  8 07:25:15 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 8 Nov 2006 04:25:15 -0800
Subject: More elegant way to obtain ACLs / permissions for windows
	directories than using "cacls" dos command?
In-Reply-To: <1162988020.060319.124030@b28g2000cwb.googlegroups.com>
References: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>
	<1162952479_41619@sp6iad.superfeed.net>
	<1162988020.060319.124030@b28g2000cwb.googlegroups.com>
Message-ID: <1162988715.639810.125270@f16g2000cwb.googlegroups.com>

Could you give an example for listing security descriptors using the
win32security module? I looked at the documentation but found it
confusing. Thanks.



From fredrik at pythonware.com  Sat Nov 11 10:26:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 16:26:54 +0100
Subject: import parser does not import parser.py in same dir on win
In-Reply-To: <ej4c0j$3qe$1@news.lysator.liu.se>
References: <ej4c0j$3qe$1@news.lysator.liu.se>
Message-ID: <ej4q40$1mp$1@sea.gmane.org>

Joel Hedlund wrote:

> It turns out that on Windows, the builtin parser module is imported 
> instead. Why?

the table of built-in modules are checked before searching the path.

> Why is there a difference? What other names are "taken"?

depends on how the interpreter is built; there's a sys variable that 
contains a list of all built-ins:

     http://effbot.org/pyref/sys.builtin_module_names

</F>



From grante at visi.com  Fri Nov  3 16:01:51 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 03 Nov 2006 21:01:51 -0000
Subject: py2exe questions
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
Message-ID: <12knbhvnnaksh68@corp.supernews.com>

On 2006-11-03, Doug Stell <celiadoug at mchsi.com> wrote:
> I have 2 questions about py2exe or any similar utility.
>
> 1. Is it possible to create a single Windows executable that does not
>    blow out to a folder full of files and can be called from scripts
>    using command line arguments?

The default operation of py2exe already meets requirement 1b:
an executable that can be called from scripts using command
line arguments.

-- 
Grant Edwards                   grante             Yow!  Now I'm concentrating
                                  at               on a specific tank battle
                               visi.com            toward the end of World
                                                   War II!


From chrispearl at gmail.com  Thu Nov  2 00:55:45 2006
From: chrispearl at gmail.com (Chris Pearl)
Date: Thu, 2 Nov 2006 07:55:45 +0200
Subject: Python tools for managing static websites?
In-Reply-To: <1162331694.836988.322220@m73g2000cwd.googlegroups.com>
References: <mailman.1542.1162296580.11739.python-list@python.org>
	<1162331694.836988.322220@m73g2000cwd.googlegroups.com>
Message-ID: <d6e943400611012155gedf9d3m53557400d2d4b6e6@mail.gmail.com>

Thanks to everyone who have contributed to this thread. Several of the
posted suggestions definitely warrant a closer look. I'm going to
review those and publish my final choice - including the reasons for
it - if anyone's interested.

-Chris


From gagsl-py at yahoo.com.ar  Fri Nov 10 18:45:14 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 20:45:14 -0300
Subject: urlretrieve get file name
In-Reply-To: <1163188701.981923.18960@h48g2000cwc.googlegroups.com>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
	<mailman.2004.1163115558.11739.python-list@python.org>
	<1163116359.787681.31490@m73g2000cwd.googlegroups.com>
	<mailman.2008.1163118450.11739.python-list@python.org>
	<1163188701.981923.18960@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061110204024.0470c078@yahoo.com.ar>

At Friday 10/11/2006 16:58, Sven wrote:

>Yes the browser suggests a file name, but I did a little research using
>http://web-sniffer.net/. The Response Header contains roughly this:
>
>HTTP Status Code: HTTP/1.1 302 Found
>Location: http://page.com/filename.zip
>Content-Length: 0
>Connection: close
>Content-Type: text/html
>
>The status code 302 tells the browser where to find the file. The funny
>thing is that calling the info() function, on the file-like response
>object, in Python doesn't return the same header. I'm so stuck. :-)
>Thanks for your help.

Because urlopen is smart enough to detect the redirection and do a 
second request.
You can use the geturl() method to obtain the true URL used (that 
would be http://page.com/filename.zip) and then rename the file.
Or, you can install your own URLOpener (I think a FancyURLOpener with 
retries=0 would be OK) and process the Location header yourself. See 
the urllib documentation.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From horpner at yahoo.com  Wed Nov 15 09:20:35 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 15 Nov 2006 15:20:35 +0100
Subject: refactoring so that multiple changes can be made with one
	variable?
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
	<pan.2006.11.15.07.57.38.519433@REMOVEME.cybersource.com.au>
	<G_A6h.7572$ig4.5917@newsread2.news.pas.earthlink.net>
Message-ID: <slrnelm8j3.k4.horpner@FIAD06.norwich.edu>

On 2006-11-15, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Wed, 15 Nov 2006 18:57:39 +1100, Steven D'Aprano
><steve at REMOVEME.cybersource.com.au> declaimed the following in
> comp.lang.python:
>> And last but most certainly not least, you can separate the
>> adjustment values into (say) an INI file, read them in at
>> run-time and pass those values to the factory function above.
>> Then write another function which walks through the INI file,
>> adjusting the values in place as needed. This is obviously
>> going to take the most work, so I strongly suggest you don't
>> go down this path unless you really have to.
>
> Nice to see I wasn't the only one to consider extending to an
> INI file for this <G>

Coincidentally, I'm just reading "The Pragmattic Programmer" for
the first time. One of guidelines is to pry the details ut of the
code if they might change. The above advice seems like a perfect
example.

-- 
Neil Cerutti
For those of you who have children and don't know it, we have a
nursery downstairs. --Church Bulletin Blooper


From george.sakkis at gmail.com  Mon Nov 13 10:00:16 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 13 Nov 2006 07:00:16 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<mailman.38.1163402844.32031.python-list@python.org>
	<1163408380.747399.18750@h54g2000cwb.googlegroups.com>
	<1163417909.768399.199650@h54g2000cwb.googlegroups.com>
Message-ID: <1163430016.542861.130100@b28g2000cwb.googlegroups.com>

Carl Banks wrote:

> George Sakkis wrote:
> > Fredrik Lundh wrote:
> >
> > > George Sakkis wrote:
> > >
> > > > The base object class would be one candidate, similarly to the way
> > > > __nonzero__ is defined to use __len__, or __contains__ to use __iter__.
> > > >
> > > > Alternatively, iter() could be a wrapper type (or perhaps mixin)
> > > > instead of a function, something like:
> > >
> > > so you're proposing to either make *all* objects respond to "+", or
> > > introduce limited *iterator* algebra.
> >
> > If by 'respond to "+"' is implied that you can get a "TypeError:
> > iterable argument required", as you get now for attempting "x in y" for
> > non-iterable y, why not ?
>
> Bad idea on many, many levels.  Don't go there.

Do you also find the way "in" works today a bad idea ?

> > Although I like the iterator algebra idea
> > better.
> >
> > > not sure how that matches the OP's wish for "mostly backwards
> > > compatible" support for *iterable* algebra, really...
> >
> > Given the subject of the thread, backwards compatibility is not the
> > main prerequisite. Besides, it's an *extension* idea; allow operations
> > that were not allowed before, not the other way around or modifying
> > existing semantics.
>
> You missed the important word (in spite of Fredrick's emphasis):
> iterable.  Your iter class solution only works for *iterators* (and not
> even all iterators); the OP wanted it to work for any *iterable*.

I didn't miss the important word, I know the distinction between
iterables and iterators; that's why I said I like the iterator algebra
idea better (compared to extending the object class so that effectively
creates an iterable algebra).

> "Iterator" and "iterable" are protocols.  The only way to implement
> what the OP wanted is to change iterable protocol, which means changing
> the documentation to say that iterable objects must implement __add__
> and that it must chain the iterables, and updating all iterable types
> to do this.  Besides the large amount of work that this will need,
> there are other problems.
>
> 1. It increases the burden on third party iterable developers.
> Protocols should be kept as simple as possible for this reason.
> 2. Many iterable types already implement __add__ (list, tuple, string),
> so this new requirement would complicate these guys a lot.

If __add__ was ever to be part of the *iterable* protocol, it would be
silly to implement it for every new iterable type; the implementation
would always be the same (i.e. chain(self,other)), so it should be put
in  a base class all iterables extend from. That would be either a
mixin class, or object. This is parallel to how __contains__ is part of
the sequence protocol, but if you (the 3rd party sequence developer)
don't define one, a default __contains__ that relies on __getitem__ is
created for you.

> > Of course, programs that attempt forbidden
> > expressions on purpose so that they can catch and handle the exception
> > would break when suddenly no exception is raised, but I doubt there are
> > many of those...
>
> 3. While not breaking backwards compatibility in the strictest sense,
> the adverse effect on incorrect code shouldn't be brushed aside.  It
> would be a bad thing if this incorrect code:
>
> a = ["hello"]
> b = "world"
> a+b
>
> suddenly started failing silently instead of raising an exception.

That's a good example for why I prefer an iterator rather than an
iterable algebra; the latter is too implicit as "a + b" doesn't call
only __add__,  but __iter__ as well. On the other hand, with a concrete
iterator type "iter(a) + iter(b)" is not any more error-prone than
'int(3) + int("2")' or 'str(3) + str("2")'.

What's the objection to an *iterator* base type and the algebra it
introduces explicitly ?

George



From jeremy+complangpython at jeremysanders.net  Tue Nov 14 09:08:50 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 14 Nov 2006 14:08:50 +0000
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejcili$pf6$1@gemini.csx.cam.ac.uk>

erikcw wrote:

> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.
> 
...
> 
> How do I sort through this data and pull out these points of
> significance?

Get a book on statistics. One idea is as follows. If you expect the points
to be centred around a single value, you can calculate the median or mean
of the points, calculate their standard deviation (aka spread), and remove
points which are more than N-times the standard deviation from the median.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From steve at holdenweb.com  Thu Nov  2 17:46:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 22:46:22 +0000
Subject: scared about refrences...
In-Reply-To: <1162506227.070059.230550@h54g2000cwb.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>	<4547d0d7$0$7246$426a34cc@news.free.fr>	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>	<454a5672$0$3721$426a74cc@news.free.fr>
	<1162506227.070059.230550@h54g2000cwb.googlegroups.com>
Message-ID: <eidsdq$ktf$1@sea.gmane.org>

SpreadTooThin wrote:
> Bruno Desthuilliers wrote:
> 
>>SpreadTooThin a ?crit :
>>
>>>Bruno Desthuilliers wrote:
>>>
>>>
>>>>Nick Vatamaniuc a ?crit :
>>>>(snip)
>>>>
>>>>
>>>>>In  Python all the primitives are copied and all other entities are
>>>>>references.
>>>>
>>>>Plain wrong. There's no "primitives" (ie : primitive data types) in
>>>>Python, only objects. And they all get passed the same way.
>>>
>>>
>>>so..
>>>def fn(x):
>>>   x = x + 1
>>>   print x
>>>
>>>a = 2
>>>fn(a)
>>>fn(2)
>>>
>>>Wouldn't you say that this is being passed by value rather than by
>>>refrence?
>>
>>It's not passed by value. when in fn(), the *local* name 'x' is bound to
>>(IOW:references) the exact same object you passed to fn(). Then you
>>rebind this (local) name to *another* object.
>>
>>def fn((x):
>>   print id(x)
>>   x = x + 1
>>   print id(x)
>>
>>n = 1256
>>print id(n)
>>fn(n)
>>
>>def fn2(alist):
>>    print id(alist)
>>   alist.append(42)
>>
>>mylist = []
>>print id(mylist)
>>fn2(mylist)
>>print mylist
>>print id(mylist)
>>
>>
>>There's nothing like "pass by value" or "pass by reference" in Python
>>(and you'll notice I didn't claimed anything about this - just that the
>>'argument passing scheme' was the same for all objects).
>>
>>What we call "variables" in Python are name=>object bindings. When
>>passing a "variable" to a function, the reference to the objet is bound
>>to the name of the argument in the function's namespace. So the *name*
>>is local to the function (hence rebinding the name to another objet
>>doesn't impact the name=>object binding in the caller's namespace), but
>>this name really refers to the same object (Python doesn't copy anything
>>unless explicitely told to do so).
>>
>>HTH
> 
> 
> 
> I realize I may be beating a dead horse here... but...
> 
You are!

> a = 2
> fn(a)
> 
>>>>3
> 
> print a
> 
>>>>2
> 
> 
> So in some cases the it is safe to assume that your variables to
> function will not
> change in other cases it is not.. but they are all the same...
> 
Mutable values can be mutated. Immutable ones can't.

Please stop worrying and start enjoying Python. Once you have started 
cutting code you will wonder why you ever bothered to spend so much time 
on this issue.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From hg at nospam.com  Wed Nov 22 09:58:50 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 08:58:50 -0600
Subject: Python visual IDE
In-Reply-To: <1164206609.276356.165670@m73g2000cwd.googlegroups.com>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
	<1164205868.349589.217040@k70g2000cwa.googlegroups.com>
	<1164206609.276356.165670@m73g2000cwd.googlegroups.com>
Message-ID: <_DZ8h.3237$pM.2926@newsfe13.lga>

king kikapu wrote:
> I have already downloaded and seen the trial of Komodo Professional.
> Indeed it has a simple Gui Builder but one can only use TKinter on it.
> No wxWidgets support and far from truly RAD, but it is the only
> "integrated"
> GUI builder in these IDEs...
> 
> 
> On Nov 22, 4:31 pm, "Steve" <s... at ferg.org> wrote:
>> I haven't used it but Komodo (Professional version) says it has:
>>
>> ActiveState GUI Builder (Komodo Professional only)
>>
>> Enhance your applications with GUI dialogs: Simple, Tk-based dialog
>> builder with seamless round-trip integration, for Perl, Python, Ruby,
>> and Tcl.
> 

I do a lot of GUI programming with wxPython.

I find that switching from desktop 1 (Eclipse/PyDev) to desktop 2
(wxDesigner) becomes a reflex quite quickly ... even under Windows
thanks to virtuawin (http://virtuawin.sourceforge.net) - both packages
also are smart enough to notice when an open file has been modified
elsewhere.

I also program in Visual-Studio and overall do not find the RAD/IDE
integration that much more convenient.


Also, I generally get the job done in wxDesigner at the beginning of the
project, and seldom have to get back into it to twick the interface.

hg




From _karlo_ at _mosor.net_  Sun Nov  5 19:56:26 2006
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Mon, 6 Nov 2006 00:56:26 +0000 (UTC)
Subject: wing ide vs. komodo?
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1162690929.501897.258360@b28g2000cwb.googlegroups.com>
	<1162708898.962171.161120@e3g2000cwe.googlegroups.com>
Message-ID: <Xns987313BC43084mosornet@161.53.160.64>

"vj" <vinjvinj at gmail.com> wrote in news:1162708898.962171.161120
@e3g2000cwe.googlegroups.com:

> The embedded python shell is also a useful feature.

Yes, but Debug Probe and Stack Data absolutely rock! Can't live without 
them anymore. Just set a breakpoint, run your code end then you can 
inspect all of the structures via Stack Data, and you can play with those 
structures using Debug Probe. Huge productivity boost...

-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From no-spam at no-spam-no-spam.invalid  Thu Nov 23 17:34:37 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 23 Nov 2006 23:34:37 +0100
Subject: Access to variable from external imported module
In-Reply-To: <1164319761.451409.196660@j44g2000cwa.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
Message-ID: <ek57lv$5cd$1@news.albasani.net>

GinTon wrote:
> Sorry, I mean access to local variable from a method
> 
> import module
> method(value)
> 
> I would to access to values that are created locally in that method

after the method has executed? usually the return value?
or you want to get all local variables, then make a func/method

def f(a=1):
    b=2
    c=3
    return locals()  #X/Object(locals())


--------


d=module.f()
print d['c']         # d.c
   




Robert


From fd0man at gmail.com  Fri Nov 17 15:10:51 2006
From: fd0man at gmail.com (Michael B. Trausch)
Date: Fri, 17 Nov 2006 15:10:51 -0500
Subject: Decimal() instead of float?
In-Reply-To: <ejeuqb$ldd$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper> <4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org>
Message-ID: <1163794251.5107.151.camel@pepper>

On Wed, 2006-11-15 at 12:48 +0100, Fredrik Lundh wrote:

> Steve Holden wrote:
> 
> >> It /would/ be nice to see Decimal() become the default.  I cannot 
> >> imagine why in an otherwise "human enough" language, math wouldn't be 
> >> included in that without going out of one's way to do it.  :-)
> >>
> > Speed has a lot to do with it. Have you timed some decimal operations 
> > against their floating-point counterparts? It might be possible to build 
> > a version of Python that used decimal instead of floating-point but it 
> > certainly wouldn't be trivial: consider the use of C language libraries 
> > that know nothing of Python's decimal representation.
> 
> judging from the various decimal FAQ:s, I think it's a bit naive to 
> think that using Decimal instead of float would somehow make everything 
> "just work":
> 
> http://www2.hursley.ibm.com/decimal/decifaq.html
> http://effbot.org/pylib/decimal.htm#decimal-faq
> 
> (btw, the OP mentioned in private mail that he wanted to store 
> geographical coordinates in decimal because floats kept messing things 
> up, but given that a 64-bit float can hold enough decimal digits to 
> represent a geographical coordinate with sub-millimeter precision on a 
> global scale, I'm not sure I buy that argument.  I suspect he was just 
> tricked by the usual repr(1.15) != "1.15" issue.  and seriously, under-
> standing the various aspects of floats and decimals is utterly trivial 
> compared to all the nearly-magical things you need to understand to be 
> able to do geographical calculations at a sub-millimeter scale.  heck, 
> even sub-kilometer stuff is pretty hard to get right ;-)


I don't have (so far as I know) a 64-bit float available to me.

Some of the lat/long pairs that I have used seem to come out fine, but
some do not.  Because the mathmatics used with them involve complex
equations when determining distance and the like, any error gets
massively compounded before a final result is evident.  Thus, the
numbers must be exact.  That's why I originally asked if Decimal() can
be used instead.  Since it cannot, that's fine, I will just use
Decimal(), assuming that it supports everything that I will need to do
with the numbers.  If not, then I guess I will have to look at something
that uses GMP.

    -- Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
   Jabber IM: fd0man at livejournal.com

Demand Freedom!  Use open and free protocols, standards, and software!
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From python.list at tim.thechases.com  Wed Nov 22 15:03:25 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 22 Nov 2006 14:03:25 -0600
Subject: regex problem
In-Reply-To: <f4cc03640611221141j51f2bcb1wa06d7a05db42a46c@mail.gmail.com>
References: <f4cc03640611221141j51f2bcb1wa06d7a05db42a46c@mail.gmail.com>
Message-ID: <4564AD0D.80806@tim.thechases.com>

> line is am trying to match is
> 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra    29.9    0.00011   1
> 
> regex i have written is
> re.compile
> (r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)')
> 
> I am trying to extract 0.0011 value from the above line.
> why doesnt it match the group(4) item of the match ?
> 
> any idea whats wrong  with it ?

Well, your ".{25}\s{3}" portion only gets you to one space short 
of your 29.9, so your "(\d+..." fails to match " 29.9" because 
there's an extra space there.  My guess (from only one datum, so 
this could be /way/ off base) would be that you mean "\s{4}" or 
possibly "\s{3,4}"

It seems like a very overconstrained regexp, but it might be just 
what you need to isolate the single line (or class of line) 
amongst the chaff of thousand others of similar form.

-tkc







From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Nov 19 07:18:39 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Nov 2006 13:18:39 +0100
Subject: tempfile.NamedTemporaryFile wont work
References: <456049ca$0$4692$426a74cc@news.free.fr>
Message-ID: <4sb0cvFurjq2U1@mid.individual.net>

Imbaud Pierre wrote:

>              tf = tempfile.NamedTemporaryFile()
>              tfName = tf.name
> [...]
>              print >> sys.stderr, '%s: %s' % (tfName, ['no',
> 'yes'][os.path.exists(tfName)])
>              subprocess.Popen(['strings', tfName])

Just out of curiosity: Why did you assign tf.name to tfname?

Hypothetically, if tf.name changed, tfname wouldn't follow since
strings are immutable.

Regards,


Bj?rn

-- 
BOFH excuse #149:

Dew on the telephone lines.



From st at tobiah.org  Fri Nov  3 16:09:49 2006
From: st at tobiah.org (tobiah)
Date: Fri, 03 Nov 2006 13:09:49 -0800
Subject: WSDL?
Message-ID: <454ba334$0$12110$88260bb3@free.teranews.com>

Is WSDL the right answer for in house communication
between programs written in different languages, or
is it more for publishing interfaces for use by parties
outside your own company?

What else is available for sharing complex structures
with processes running programs that were written in
other languages?

Thanks,

Toby

-- 
Posted via a free Usenet account from http://www.teranews.com



From gheorghe.postelnicu at gmail.com  Thu Nov 30 10:37:40 2006
From: gheorghe.postelnicu at gmail.com (Gheorghe Postelnicu)
Date: Thu, 30 Nov 2006 10:37:40 -0500
Subject: Threading
Message-ID: <8094b1b60611300737n36a51b47n40ab5ed4b770bc78@mail.gmail.com>

Hi,

I have a very simple Python script that performs some batch processing
as follows: a list of system commands is set up in an automated way
and then each of the processes is launched separately using threads -
a basic producer-consumer thing.

I found a recipe on ASPN on how to intercept keyboard interrupts and
that is useful if I need to brutally kill the launching process.

However, my question regards killing the actual children threads -
they are spending lots of time in system calls, so I cannot insert
some while loop in a derived Thread class.

Any suggestions would be apreciated.

Thanks,
-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School


From Roberto.Bonvallet at cern.ch  Wed Nov  1 08:47:49 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 1 Nov 2006 13:47:49 +0000 (UTC)
Subject: Why can't you assign to a list in a loop without enumerate?
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
	<mailman.1563.1162321248.11739.python-list@python.org>
	<4qrln8Fo2ollU1@individual.net>
Message-ID: <eia8i5$91m$1@cernne03.cern.ch>

Bjoern Schliessmann wrote:
> Fredrik Lundh wrote:
> 
>> what's wrong with using enumerate?  or a list comprehension?  or
>> some other of the many different ways you can use to build a list
>> from a set of values?
> 
> Shouldn't there be one -- and preferably only one -- obvious way to
> do it? 8)

The obvious one is to use enumerate.
TOOWTDI allows less obvious ways to exist.

-- 
Roberto Bonvallet


From theller at ctypes.org  Thu Nov 23 11:25:52 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 23 Nov 2006 17:25:52 +0100
Subject: select() on WinXP
In-Reply-To: <1164298634.189031.282560@h54g2000cwb.googlegroups.com>
References: <1164296300.268074.250230@j44g2000cwa.googlegroups.com>	<mailman.646.1164296840.32031.python-list@python.org>
	<1164298634.189031.282560@h54g2000cwb.googlegroups.com>
Message-ID: <4565CB90.7060602@ctypes.org>

grebekel at gmail.com schrieb:
> I'm using it for sockets, it works on linux but not on Windows. The
> actual code is something like (server side):
> 
> r, w, e = select.select(self.clients, [], self.clients, 5)
> 
> where self.clients is a list of accepted sockets.
> 
The docs for select.select say:

Empty sequences are allowed, but acceptance of three empty sequences is platform-dependent.
(It is known to work on Unix but not on Windows.) 

Thomas



From fredrik at pythonware.com  Wed Nov  1 01:24:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 07:24:50 +0100
Subject: 3d programming without opengl
In-Reply-To: <4547cc58$0$11970$afc38c87@news.optusnet.com.au>
References: <mailman.1526.1162280594.11739.python-list@python.org>	<12kf7gishr60ta3@corp.supernews.com>	<mailman.1566.1162322123.11739.python-list@python.org>
	<4547cc58$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <ei9ejh$ool$1@sea.gmane.org>

Richard Jones wrote:

>> Pure Python doesn't necessarily imply "no graphics drawing code written
>> in some other language", though.  You can get pretty far by using a 2D
>> library for simple 3D rendering.
> 
> Someone wrote a 3D demo for the pygame.draw challenge*. It worked but
> unfortunately he didn't end up finishing and submitting it. It had severe
> performance limitations :)

someone just posted this to reddit:

     http://www.uselesspickles.com/triangles/demo.html

which I'd say qualifies as simple 3D with pretty decent performance 
given what it does and what platform it runs on...

</F>



From podi.ex at gmail.com  Wed Nov 22 19:27:57 2006
From: podi.ex at gmail.com (Podi)
Date: 22 Nov 2006 16:27:57 -0800
Subject: windows background process
Message-ID: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>

Hi,

I am using Python 2.4.4 on Windows XP SP2.

I am trying to start a process (infinite loop application) in the
background and I've tried several options and none of them seem to
work.

Any help would be much appreciated.

Thanks,
P

1.
# This works on PythonWin interactive window, but the python.exe
process hangs until mycmd.exe process dies
>>> os.popen("mycmd.exe myargs")  # works

if __name__ == '__main__':
    os.popen("mycmd.exe myargs")  # hangs

2.

>>> os.system("mycmd.exe myargs")  # hangs, as expected

3.
os.spawnl(os.P_NOWAIT, 'mycmd.exe', 'myargs') # mycmd.exe not started
os.spawnv(os.P_NOWAIT, 'mycmd.exe', tuple('myargs')) # mycmd.exe not
started

4.
# Works, but not portable. My code is expected to run on *nix later on
os.system('start /B "dummy title" "mycmd.exe" myargs')



From steve at REMOVE.THIS.cybersource.com.au  Tue Nov  7 09:44:31 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 08 Nov 2006 01:44:31 +1100
Subject: create global variables?-the full story
References: <1162275890.4546ec32cd351@www2.helsinki.fi>
	<ei732n$2hg$1@sea.gmane.org> <45471B66.9060702@helsinki.fi>
	<ei76rh$f4p$1@sea.gmane.org>
	<mailman.1537.1162294403.11739.python-list@python.org>
	<eid0jn$phb$1@web.aioe.org>
	<mailman.1834.1162896826.11739.python-list@python.org>
Message-ID: <pan.2006.11.07.14.44.31.797624@REMOVE.THIS.cybersource.com.au>

On Tue, 07 Nov 2006 12:54:36 +0200, Alistair King wrote:

> Does anyone knows of a simple way of
> determining how much processer time it takes to do these calculations?


See the timeit module.

-- 
Steven.



From Anthon.van.der.Neut at googlemail.com  Tue Nov 14 07:08:57 2006
From: Anthon.van.der.Neut at googlemail.com (Anthon)
Date: 14 Nov 2006 04:08:57 -0800
Subject: Python 2.5 Core Dump on Solaris 8
In-Reply-To: <mailman.2071.1163195374.11739.python-list@python.org>
References: <mailman.2071.1163195374.11739.python-list@python.org>
Message-ID: <1163506137.477368.111160@h48g2000cwc.googlegroups.com>

Hi Melissa,

I run into similar problems after compiling python-ldap 2.2.0 for
Python 2.5 on SuSE Linux 9.3
and running a small commandline application
*** glibc detected *** double free or corruption (out): 0x40180788 ***
I realy suspect the _ldap.so file. I have not found a solution yet, but
will let you know if I do.

Did you compile python-ldap yourself for Python 2.5?
Which version of python-ldap? Which compiler?

Regards
Anthon

Melissa Evans wrote:
> Hi.  I'm new to Python. :)
>
> I've modified grappy.py,
> http://www.stacken.kth.se/~mattiasa/projects/grappy/, a postfix policy
> daemon for greylisting. to use LDAP as a backend instead of SQL (with
> python-ldap.)  The daemon runs fine when testing but when I put it under
> load it core dumps quickly.  What little analysis I know how to do shows
> similar information every time.  Any advice on where to go from here?
> 
> Thanks!
> Melissa
>



From gagsl-py at yahoo.com.ar  Wed Nov  8 14:23:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 16:23:23 -0300
Subject: please help with optimisation of this code - update of
	given table according to another table
In-Reply-To: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>
References: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108161834.05a83d18@yahoo.com.ar>

At Wednesday 8/11/2006 07:18, Farraige wrote:

>         for row_t1 in t1:
>             for  row_t2 in t2:
>                 if [row_t1[i] for i in keyColumns] == [row_t2[j] for j
>in keyColumns]:
>                     # the keys are the same
>                     for colName in columnsToBeUpdated:
>                         row_t1[colName] = row_t2[colName]
>
>                     # go outside the inner loop - we found a row with
>                     # the same key in the table
>                     break
>
>In my algorithm I have 2 for loops and I have no idea how to optimise
>it (maybe with map? )
>I call this method for very large data and the performance is a
>critical issue for me :(

def getkey(row):
   return tuple([row[i] for i in keyColumns])

Sort both tables using .sort(key=getkey); then traverse both in 
paralell like in classic merge; in 1 pass you get the job done (not 
counting the two initial sorts)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sandysj at juno.com  Thu Nov 16 11:04:02 2006
From: sandysj at juno.com (Jeff Sandys)
Date: 16 Nov 2006 08:04:02 -0800
Subject: matplotlib real time grap.
In-Reply-To: <1163664130.657647.260620@e3g2000cwe.googlegroups.com>
References: <1163664130.657647.260620@e3g2000cwe.googlegroups.com>
Message-ID: <1163693042.604213.235510@m73g2000cwd.googlegroups.com>

It sounds like you need a stripchart like:
http://jstripchart.sourceforge.net/
written in Python of course.

On Nov 16, 12:02 am, "luca72" <lucabe... at libero.it> wrote:
...
>
> with this i have the grap on the screen but i have to update every time
> that i receive others data coming from two instruments (10 seconds),
> how i can update the grap?
> 
> Regards
> 
> Luca



From outstretchedarm at hotmail.com  Fri Nov  3 16:10:08 2006
From: outstretchedarm at hotmail.com (Omar)
Date: 3 Nov 2006 13:10:08 -0800
Subject: Programming Language that is Spreadsheet/Table Based
Message-ID: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>

I'm looking for a programming language or module that sorta looks and
feels like MS Excel (I love and think in tables), yet has the power and
open-endedness of python or javascript.  I'm still pretty new to
python.

any ideas?  i've been having some fun with VBA in excel, but I want
something I can save as en exe and call my own creation, y'know?



From Thomas.Ploch at gmx.net  Thu Nov 30 15:07:10 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 21:07:10 +0100
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164913125.509492.54060@79g2000cws.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
Message-ID: <456F39EE.90206@gmx.net>

John Henry schrieb:
> If I have a list of say, 10 elements and I need to slice it into
> irregular size list, I would have to create a bunch of temporary
> variables and then regroup them afterwords, like:
> 
> # Just for illustration. Alist can be any existing 10 element list
> a_list=("",)*10
> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> alist=(a,)
> blist=(b,)
> clist=(c1,c2,c3)
> dlist=(d2,d3,d4,d5)
> 
> That obviously work but do I *really* have to do that?
> 
> BTW: I know you can do:
> alist=a_list[0]
> blist=a_list[1]
> clist=a_list[2:5]
> dlist=a_list[5:]
> 
> but I don't see that it's any better.
> 
> Can I say something to the effect of:
> 
> (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work
> 
> ??
> 
> I am asking this because I have a section of code that contains *lots*
> of things like this.  It makes the code very unreadable.
> 
> Thanks,
> 

I had a little bit of fun while writing this:

itemList = (a,b,c1,c2,c3,d1,d2,d3,d4,d5) and
itemList2 = (a1,a2,a3,b,c,d1,d2,d3,d4,d5) the next time.

def getSlices(aCount, bCount, cCount, dCount, items):
    a,b,c,d = (items[0:aCount],
                items[aCount:aCount+bCount],
                items[aCount+bCount:aCount+bCount+cCount],
		item[aCount+bCount+cCount:aCount+bCount+cCount+dCount])
    return list(a),list(b),list(c),list(d)

>>>a,b,c,d = getSlices(1,1,3,5,itemList)
>>>print a,b,c,d
['a'] ['b'] ['c1', 'c2', 'c3'] ['d1', 'd2', 'd3', 'd4', 'd5']

>>>a,b,c,d = getSlices(3,1,1,0,itemList2)
>>>print a,b,c,d
['a1', 'a2', 'a3'] ['b'] ['c'] []

%-)

Thomas


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Nov  1 10:20:47 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 01 Nov 2006 16:20:47 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>	<mailman.1563.1162321248.11739.python-list@python.org>
	<4qrln8Fo2ollU1@individual.net>
	<mailman.1593.1162387930.11739.python-list@python.org>
Message-ID: <4qrsafFo961qU1@individual.net>

Fredrik Lundh wrote:

> define "it".

Sorry! I mean iterating over a list and having the list index
available in the loop. Like:

for i, thing in enumerate(things):
    pass

Regards,


Bj?rn

-- 
BOFH excuse #254:

Interference from lunar radiation



From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 17:51:00 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 22:51:00 GMT
Subject: forwarding *arg parameter
In-Reply-To: <U6s3h.3309$ig4.2795@newsread2.news.pas.earthlink.net>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi>
	<U6s3h.3309$ig4.2795@newsread2.news.pas.earthlink.net>
Message-ID: <oVt3h.336$7b6.109@read3.inet.fi>

Dennis Lee Bieber wrote:
> On Sun, 05 Nov 2006 17:42:30 GMT, Tuomas <tuomas.vesterinen at pp.inet.fi>
> declaimed the following in comp.lang.python:
> 
> 
> 
>>I am looking a shorter way to do the above in the case:
>>
>>def g(*arg):
>>     return arg
>>
>>def f(*arg):
>>     return g(arg)
>>
>>How can g know if it is called directly with (('foo', 'bar'),) or via f 
> 
> 
> 	Typically, the responsibility should be on the CALLER, not the
> CALLED..
> 
> 
>>>>def g(*arg):
> 
> ... 	return arg
> ... 
> 
>>>>def f(*arg):
> 
> ... 	return g(*arg)	#<<<<<<<< unpack tuple on call
> ... 
> 
>>>>f("a", 1, 2)
> 
> ('a', 1, 2)
> 
> 
> 	Note how f() is calling g() using an * -- Since f() "knows" that its
> arguments were "packed" it calls g() with an unpack marker. Then g()
> gets the arguments via whatever scheme it was coded to use.
> 
> 
>>>>def f(*arg):
> 
> ... 	return g(arg)	#<<<<<<<<<< no tuple unpack
> ... 
> 
>>>>f("a", 1, 2)
> 
> (('a', 1, 2),)
> 
>  
I fylly agree with tis: "Typically, the responsibility should be on the 
CALLER, not the CALLED..". I just don't know how to unpack *arg for 
calling g. I can get the len(arg), but how to formulate an unpacked call 
g(arg[0], arg[1], ..). Building a string for eval("g(arg[0], arg[1], 
..)") seems glumsy to me.

TV


From privat at christianhahn.de  Fri Nov 10 05:40:10 2006
From: privat at christianhahn.de (ChristianHahn)
Date: 10 Nov 2006 02:40:10 -0800
Subject: pythoncom and dialog
Message-ID: <1163155210.314431.134980@i42g2000cwa.googlegroups.com>

Hi,

I inherited a piece of code, that doesn't work anymore. It's a
COM-object.
One interface method opens a modal dialog ( OpenDialog() ), with the
other methods one can set the values for a ComboBox or query the input
of the user.

This COM-module is istantiated(?) via
st=win32com.client.Dispatch(..)
within a windows application (btw it's called Prime Front Arena). The
scripting language for this application is Python.

The COM module works fine, when I call it from Excel via VBA or from
python directly.
When I call it from the mentioned application, sometime (not always)
the python statement st.OpenDialog() never returns and the application
is not responding anymore.
In the previous release of this appication this piece of code worked.
In the new release the app now using two threads, one thread for a
log-windows and one thread for all other windows.

I don't know if this a problem with pythoncom or a windows problem (two
threads, modal dialog), but when I debug it seems to me that it get
stuck somewhere in the pythoncom.dll

So

1) Does anyone have any hints for. I'm completly in the dark.
2) How can I compile a debug version of the pythoncom.dll by myself? I
downloaded the Zip-File, but when I try to open an *.dsp file, i get
asked for password (SafeSource)? What's that.

You see my windows skill are limited (but increased dramatically the
last days).

Thanks in advance
Christian



From rNOSPAMon at flownet.com  Thu Nov 30 20:00:38 2006
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Thu, 30 Nov 2006 17:00:38 -0800
Subject: Is there a reason not to do this?
References: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>
	<4t96ujF134nv7U1@mid.uni-berlin.de>
Message-ID: <rNOSPAMon-D8A387.17003830112006@news.gha.chartermi.net>

In article <4t96ujF134nv7U1 at mid.uni-berlin.de>,
 "Diez B. Roggisch" <deets at nospam.web.de> wrote:

> Ron Garret schrieb:
> > One of the things I find annoying about Python is that when you make a 
> > change to a method definition that change is not reflected in existing 
> > instances of a class (because you're really defining a new class when 
> > you reload a class definition, not actually redefining it).  So I came 
> > up with this programming style:
> > 
> > def defmethod(cls):
> >   return lambda (func): type.__setattr__(cls, func.func_name, func)
> > 
> > class c1(object): pass
> > 
> > @defmethod(c1)
> > def m1(self, x): ...
> > 
> > 
> > Now if you redefine m1, existing instances of c1 will see the change.
> > 
> > My question is: is there a reason not to do this?  Does it screw 
> > something up behind the scenes?  Is it unpythonic?  Why isn't this 
> > standard operating procedure?
> 
> What are you doing that needs this permanent redefinition? I like the 
> repl, yet usually - especially when dealing with classes - I write a 
> text file containing code. So, i just run that on a command line again, 
> if I made some changes, recreating whatever objects I want again.
> 
> Even if I'd not do that, but used a long-running interpreter inside an 
> IDE (which is what I presume you are doing) - why do you _care_ about 
> the old objects the first place? I mean, you obviously changed the 
> classes for a reason. So, you are not being productive here, but still 
> programming. Which means that you don't _have_ to care about old, 
> unchanged objects too much.
> 
> But in the end - it's your code. It will run slower, it looks kinda 
> weird as someone who's reading it has to know what it is for, but if it 
> suits your needs - do it.
> 
> Diez

I have two motivations.

First, I'm dealing with some classes whose instances take a long time to 
construct, which makes for a long debug cycle if I have to reconstruct 
them after every code change.

Second, the design just naturally seems to break down that way.  I have 
a library that adds functionality (persistence) to a set of existing 
classes.  The persistence code stores the objects in a relational DB, so 
it's pretty hairy code, and it has nothing to do with the functionality 
that the classes actually provide.  The original classes are useful even 
with the persistence code, and I'm trying to keep things lightweight.

If there's a better way to accomplish all this I'm all ears.

rg


From david at boddie.org.uk  Mon Nov  6 11:39:06 2006
From: david at boddie.org.uk (David Boddie)
Date: 6 Nov 2006 08:39:06 -0800
Subject: ANN: PyQt v4.1 Released
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
Message-ID: <1162831146.195927.296110@e3g2000cwe.googlegroups.com>

Tool69 wrote:

> I followed the docs to build qscintilla2, all is going well with no
> errors, but when I launched the PyQt Syntax Highlighter Example,
> nothing is highlighted but the first line of text, whereas the C++
> sample works well in the demo.

Do you mean the example from the PyQt4 distribution? That uses a port
of an old syntax highlighting example from Qt 4.0. Someone needs to
"port" the C++ example from Qt 4.2 to PyQt4.

The example itself doesn't actually use QScintilla2 - there used to
be a demo from Qt that was converted to use QScintilla. Maybe that's
been ported to PyQt as well.

David



From brian at rkspeed-rugby.dk  Fri Nov  3 02:03:52 2006
From: brian at rkspeed-rugby.dk (Brian Elmegaard)
Date: Fri, 03 Nov 2006 06:03:52 -0100
Subject: emacs shell hangs on W32 with python
References: <1162508249.399337.233170@m73g2000cwd.googlegroups.com>
Message-ID: <uu01hko4n.fsf@rkspeed-rugby.dk>

emin.shopper at gmail.com writes:

> Is there any way to run python through emacs or xemacs without having
> it hang or is shell support broken?

Doing it from eshell gives the same problem :-(
-- 
Brian (remove the sport for mail)
http://www.et.web.mek.dtu.dk/Staff/be/be.html
Rugbyklubben Speed Scandinavian Open 7s Rugby http://www.rkspeed.dk


From sjmachin at lexicon.net  Wed Nov 22 17:40:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 14:40:59 -0800
Subject: utf - string translation
In-Reply-To: <4564dd7b$0$1349$834e42db@reader.greatnowhere.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<4564dd7b$0$1349$834e42db@reader.greatnowhere.com>
Message-ID: <1164235259.737620.323260@m73g2000cwd.googlegroups.com>


David H Wild wrote:
> In article <1164232741.215312.322990 at k70g2000cwa.googlegroups.com>,
>    John Machin <sjmachin at lexicon.net> wrote:
> > So why do you want to strip off accents? The history of communication
> > has several examples of significant difference in meaning caused by
> > minute differences in punctuation or accents including one of which you
> > may have heard: a will that could be read (in part) as either "a chacun
> > d'eux million francs" or "a chacun deux million francs" with the
> > remainder to a 3rd party.
>
> The difference there, though, is a punctuation character, not an accent.
>

I did say "differences in punctuation or accents". Yes, the only
example I could recall OTTOMH was a difference in punctuation --
according to legend, a fly-spot IIRC :-)



From amitsoni.1984 at gmail.com  Wed Nov  8 07:35:13 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 8 Nov 2006 04:35:13 -0800
Subject: assigning a sequence to an array
In-Reply-To: <mailman.1883.1162973116.11739.python-list@python.org>
References: <1162971378.536088.35590@m73g2000cwd.googlegroups.com>
	<mailman.1883.1162973116.11739.python-list@python.org>
Message-ID: <1162989312.966486.272140@m7g2000cwm.googlegroups.com>

actually what i want to do is this:
i have a file with following format:
1 2
3 9
2 3
4 4

I want to read it and then store the values into two matrices, s.t.
A=[1 2;3 9]
B=[2 3;4 4]

any easier way of doing this?
thanks
Amit

Robert Kern wrote:
> amitsoni.1984 at gmail.com wrote:
> > Hi,
> > I am using  "A[a,:]=row" in python, where A is a matrix and row is a
> > sequence. But it gives following error:
> > -------- error------
> >     A[a,:]=row
> > ValueError: setting an array element with a sequence.
> >
> > Is there a way to change type of sequence to array so that this
> > situation could be handled
>
> You don't say what array package you are using. I presume numpy. In any case,
> the place to ask those questions (even for the older numarray and Numeric
> packages) is the numpy list.
>
>   http://www.scipy.org/Mailing_Lists
>
> We will need some more information from you when you come to the numpy list.
> Please reduce your problematic code to the smallest, self-contained script that
> demonstrates the problem, and post it and the exact output that you get.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco



From fredrik at pythonware.com  Sat Nov 11 18:57:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 00:57:23 +0100
Subject: reduce to be removed?
In-Reply-To: <1163288885.884417.218270@f16g2000cwb.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
Message-ID: <ej5o10$kqu$1@sea.gmane.org>

Dustan wrote:

 > Because I'm embedding this expression in a list comprehension

because?

</F>



From elderic at ish.de  Thu Nov  2 09:40:31 2006
From: elderic at ish.de (elderic)
Date: 2 Nov 2006 06:40:31 -0800
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>
Message-ID: <1162478431.624590.29290@m7g2000cwm.googlegroups.com>

> What's the problem with this?
>
> from types import FunctionType
> if isinstance(f, FunctionType):
>     ...
>
> Bye,
> bearophile

Well... it's discouraged by the docs =)

At least the use of module types.
I was just wondering if there were some alternatives.
Never thought I would start off a thread this long =)

That was basically my reason for asking about something similar like
the functions list(), dict(), int(), etc... when called without (),
they return <type 'sometype'>.
I just wanted to know if there was a keyword for functions, too.

Then u could've done: type(f) is function
quite similar to: type(x) is int

Didn't intent to be a Documentation-Nazi *G*

-elderic

Excuse my large paste from the Python 2.5 Documentation:
---------------------------------------------------------------------------------------
5.15 types -- Names for built-in types

<snip!>

Typical use is for functions that do different things depending on
their argument types, like the following:

from types import *
def delete(mylist, item):
    if type(item) is IntType:
       del mylist[item]
    else:
       mylist.remove(item)

Starting in Python 2.2, built-in factory functions such as int() and
str() are also names for the corresponding types. This is now the
preferred way to access the type instead of using the types module.
Accordingly, the example above should be written as follows:

def delete(mylist, item):
    if isinstance(item, int):
       del mylist[item]
    else:
       mylist.remove(item)
---------------------------------------------------------------------------------------



From fsenkel at lynx.neu.edu  Mon Nov  6 13:08:47 2006
From: fsenkel at lynx.neu.edu (monkeyboy)
Date: 6 Nov 2006 10:08:47 -0800
Subject: Plot pkg - Multiple Y axes?
Message-ID: <1162836527.115500.46420@i42g2000cwa.googlegroups.com>

Hello,

I'm searching for a plotting package that will allow multiple y axes of
different scales. For example I'd like to overlay 4 or 5 time series
with each series having a separate axis. Does anyone know of such a
package?

Thank you,

Frank



From kw at codebykevin.com  Sun Nov 26 15:50:43 2006
From: kw at codebykevin.com (Kevin Walzer)
Date: Sun, 26 Nov 2006 15:50:43 -0500
Subject: Several entries on Tile and TableList at the Tkinter wiki
Message-ID: <942ad$4569fe23$4275d90a$25231@FUSE.NET>

I'm not sure how often members of this list visit the Tkinter wiki at
http://tkinter.unpythonic.net/wiki/FrontPage;  this wiki seems to have
less traffic in general than the Tcl/Tk wiki at http://wiki.tcl.tk.
Given that, I hope it's not out of line for me to call attention to
several pages that I've posted about integrating Tile
(http://tktable.sourceforge.net/tile) and TableList
(http://www.nemethi.de, http://wiki.tcl.tk/5527) into Tkinter
applications. I've noted a serious lack of resources/documentation about
these two powerful Tk components. In addition to some documentation,
screenshots, and sample applications, I've posted updated versions of
the original TableList and Tile wrappers by Martin Franklin.

I should take this moment to thank Mr. Franklin for his work on these
wrappers; whatever I added to them was pretty minimal compared to the
heavy lifting he did. He originally posted them on the Internet last
year, but the site that hosted them has gone dark. Anyway, Mr. Franklin,
if you are reading this, thank you for your hard work; it has been
enormously helpful. I hope my own efforts extend your work and make it
even more useful for other Tkinter developers.

Here are the links:

http://tkinter.unpythonic.net/wiki/UsingTile
http://tkinter.unpythonic.net/wiki/TileWrapper
http://tkinter.unpythonic.net/wiki/TableListWrapper
http://tkinter.unpythonic.net/wiki/TableListTileWrapper
http://tkinter.unpythonic.net/wiki/PyLocateTile
http://tkinter.unpythonic.net/wiki/PyLocate

Hope these prove useful to others, as starting points for your own work
if nothing else. Corrections and improvements are of course invited;
it's a wiki!


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


From nateastle at gmail.com  Sat Nov 18 11:50:56 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 18 Nov 2006 08:50:56 -0800
Subject: basic python questions
In-Reply-To: <pan.2006.11.18.09.33.16.488148@gmx.net>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
Message-ID: <1163868656.416276.277310@m7g2000cwm.googlegroups.com>

I have taken the coments and think I have implemented most. My only
question is how to use the enumerator. Here is what I did, I have tried
a couple of things but was unable to figure out how to get the line
number.

def Xref(filename):
    try:
        fp = open(filename, "r")
    except:
        raise "Couldn't read input file \"%s\"" % filename
    dict = {}
    line_num=0
    for words in iter(fp.readline,""):
        words = set(words.split())
        line_num = line_num+1
        for word in words:
            word = word.strip(".,!?:;")
            if not dict.has_key(word):
                dict[word] = []
            dict[word].append(line_num)
    fp.close()
    keys = sorted(dict);
    for key in keys:
        print key," : ", dict[key]
    return dict

Marc 'BlackJack' Rintsch wrote:
> In <1163829271.660193.70450 at j44g2000cwa.googlegroups.com>,
> nateastle at gmail.com wrote:
>
> > def Xref(filename):
> >     try:
> >         fp = open(filename, "r")
> >         lines = fp.readlines()
> >         fp.close()
> >     except:
> >         raise "Couldn't read input file \"%s\"" % filename
> >     dict = {}
> >     for line_num in xrange(len(lines)):
>
> Instead of reading the file completely into a list you can iterate over
> the (open) file object and the `enumerate()` function can be used to get
> an index number for each line.
>
> >         if lines[line_num] == "":  continue
>
> Take a look at the lines you've read and you'll see why the ``continue``
> is never executed.
>
> >         words = lines[line_num].split()
> >         for word in words:
> >             if not dict.has_key(word):
> >                 dict[word] = []
> >             if line_num+1 not in dict[word]:
> >                 dict[word].append(line_num+1)
>
> Instead of dealing with words that appear more than once in a line you may
> use a `set()` to remove duplicates before entering the loop.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch



From sjmachin at lexicon.net  Mon Nov 20 14:23:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 11:23:45 -0800
Subject: Help!!! New to Python and getting an error I can't figure out
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <1164050624.217296.267630@k70g2000cwa.googlegroups.com>

Tom Mountney wrote:
> Any help is greatly appreciated!!!
>
> I'm learning python and from a book I tried this program: (all the
> indentation is there just doen't appear in this EMail)

Some books have websites from which you can download the source of
examples so you don't have to type them in carefully yourself; is this
one not so?

> ----------------------------------------------------------
>

[snip]

>  def findfiles(self, pattern):
>   "Accepts pattern, returns filenames that contain pattern"
>   return[x for x in self.files if x.find(pattern) != -1

You are missing a bracket ("]") off the end of this line. Python allows
automatic statement continuation while there are excess left
parentheses brackets & braces, so you don't get told about the error
until the next line.

BTW, most modern text editors and IDEs have some sort of assistance
with ()[]{}

>
> #test
> if __name__ == "__main__":
>  (g = dirGrep("c:\\winnt"))
>  files = g.findFiles(".py")
>  print g.findLines("java", files)
>
> When I try to run the program - python grep.py - I get the following error:
>
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax
> 
> What am I doing wrong?
> Thanks for any help

HTH,
John



From acatejr at gmail.com  Tue Nov 21 00:59:49 2006
From: acatejr at gmail.com (acatejr at gmail.com)
Date: 20 Nov 2006 21:59:49 -0800
Subject: Parsing/Splitting Line
Message-ID: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>

I have a text file and each line is a list of values.  The values are
not delimited, but every four characters is a value.  How do I get
python to split this kind of data?  Thanks.



From rjtucke at gmail.com  Wed Nov 29 23:40:22 2006
From: rjtucke at gmail.com (rjtucke)
Date: 29 Nov 2006 20:40:22 -0800
Subject: a quickie: range - x
In-Reply-To: <1164858136.495250.180790@14g2000cws.googlegroups.com>
References: <1164858136.495250.180790@14g2000cws.googlegroups.com>
Message-ID: <1164861622.129857.176190@h54g2000cwb.googlegroups.com>

Thanks, all- that helped.
Ross



From no-spam at no-spam-no-spam.com  Thu Nov  2 13:10:42 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 02 Nov 2006 19:10:42 +0100
Subject: Python in sci/tech applications
In-Reply-To: <1162489638.013433.102180@h48g2000cwc.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
Message-ID: <eidcb3$op2$1@news.albasani.net>

bearophileHUGS at lycos.com wrote:
> mattf:
>> 3) -There's a problem with development under Windows.
> 
> It's possibile to compile Python with MinGW, and to create extensions
> with it. So some site can host a single zip file that contains both
> MinGW and Python compiled with it, all ready and set. A person not much
> expert can then create compiled small extensions in a short time
> without too much complexities. (Or maybe the D language can be packed
> into that, instead of MinGW, to do similar things. D can be a good
> language used with Python) But then probably PIL, scipy, etc have to be
> compiled again for such alternative official or semi-official Python
> distribution.
> 

Is it really not possible to create extension libs with older MSVC or Mingw, which work with regular Python binaries version 2.4 and 2.5 ?
Maybe with some special import libraries?

(another option is to stay with Python2.3, which has a small memory footprint and compiles with crtl4.2 libs (VC6, ...) )

-robert


From cliff at develix.com  Wed Nov  8 15:00:28 2006
From: cliff at develix.com (Cliff Wells)
Date: Wed, 08 Nov 2006 12:00:28 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <eitahh$nov$1@panix3.panix.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
	<eitahh$nov$1@panix3.panix.com>
Message-ID: <1163016028.3371.60.camel@localhost.localdomain>

On Wed, 2006-11-08 at 11:18 -0800, Aahz wrote:
> In article <mailman.1907.1163003856.11739.python-list at python.org>,
>  <skip at pobox.com> wrote:
> >
> >I'm with Beliavsky on this one.  I can't see any particular reason to curse
> >in a forum such as c.l.py.  It just coarsens the discussion with no obvious
> >positive benefit as far as I can see.
> 
> Actually, I do agree that profanity "should" be avoided on c.l.py; what
> I disagree with rather vociferously is having language police like
> Beliavsky.  I consider Beliavsky's offense far worse than the original
> post.

I think this sums up my point of view as well (although I would have
used around 3215 more words to say it). 

Cliff




From uche.ogbuji at gmail.com  Sun Nov 19 08:03:41 2006
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: 19 Nov 2006 05:03:41 -0800
Subject: lxml/ElementTree and .tail
In-Reply-To: <mailman.408.1163844581.32031.python-list@python.org>
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
	<mailman.251.1163679925.32031.python-list@python.org>
	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>
	<mailman.408.1163844581.32031.python-list@python.org>
Message-ID: <1163941421.235619.150260@f16g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> Uche Ogbuji wrote:
>
> > I certainly have never liked the aspects of the ElementTree API under
> > present discussion.  But that's not as important as the fact that I
> > think the above statement is misleading.  There has always been a
> > battle in XML between the people who think the serialization is
> > preeminent, and those who believe some data model is preeminent, but
> > the reality is that XML 1.0 (an 1.1) is a spec *defined* by its
> > serialization.
>
> sure, the computing world is and has always been full of people who want
> the simplest thing to look a lot harder than it actually is.  after all,
> *they* spent lots of time reading all the specifications, they've bought
> all the books, and went to all the seminars, so it's simply not fair
> when others are cheating.

You sound bitter about something.  Don't worry, it's really not all
that serious.

> in reality, *all* interchange formats are easier to understand and use
> if you focus on a (complete or intentionally simplified) data model of
> the things being interchanged, and treat various artifacts of the
> byte-stream used by the wire format as artifacts, historical accidents
> based on what specification happened to be written before the other, or
> what some guy did or did not do in the seventies, as accidents, and
> esoteric arcana disseminated on limited-distribution mailing lists as
> about as relevant for your customer as last week's episode of American Idol.

The fact that the XML Infoset is hardly used outside W3C XML Schema,
and that the XPath data model is far more common, and that focus on the
serialization is even more common than that is a matter of everyday
practicality.

And oh by the way, this thread is all about *your* customer's
complaining.  And your response is to give them your philosophical take
on XML.  Doesn't that contradict what you're saying above?

Oh never mind.  You posted something misleading, and I posted another
point of view.  I know you're incapable of any disagreement that
doesn't devolve into a full-scale flame-war.  Sometimes I have time for
that sort of thing.  This is not one fo those times, so this is
probably where I get off.

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From steve at holdenweb.com  Fri Nov 10 15:42:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 14:42:29 -0600
Subject: Modules, Packages and Developer Confusion. Oh My!
In-Reply-To: <1163190657.792705.55030@m73g2000cwd.googlegroups.com>
References: <1163190657.792705.55030@m73g2000cwd.googlegroups.com>
Message-ID: <ej2o5d$rr6$1@sea.gmane.org>

dhable at gmail.com wrote:
> I think I'm still missing something in how python is handling packages
> and it's mixing me up. I have a package with three files (modules?)
> like so:
> 
> OPS:\
>   __init__.py
>   model.py
>   search.py
> 
> To hide more details of the package structure, I import model and
> search inside of __init__. It also seemed like a good idea to define a
> global function that creates a database connection and I added it to
> __init__.py. Thus, I have:
> 
> 
> from model import *
> from search import *
> 
> def create_connection():
>   # details are unimportant for this example
> 
> 
> When I try to use the create_connection function in model, I get errors
> when I use it as a global function ( just create_connection()). The
> only way to resolve the error was to import OPS inside of model and use
> OPS.create_connection(). This doesn't seem natural. If model is part of
> OPS, why do I need to tell python to import OPS and use this function
> from OPS? I can see doing that from the outside world, but inside?
> 
> Any clarification would be greatly appreciated.
> 
The def statement binds the name create_connection in the model module's 
namespace to the function it defines. So you write EITHER

import model # puts model in the current namespace
conn = model.create_connection( ... )

OR

from model import * # copies model's namespace into current
conn = create_connection( ... )

Hope this helps.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jstroud at mbi.ucla.edu  Fri Nov  3 23:50:22 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Nov 2006 04:50:22 GMT
Subject: Python Classes and dynamic class members
In-Reply-To: <1162597703.632080.75970@i42g2000cwa.googlegroups.com>
References: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>
	<xkQ2h.21568$TV3.20249@newssvr21.news.prodigy.com>
	<1162597703.632080.75970@i42g2000cwa.googlegroups.com>
Message-ID: <i_U2h.915$7F3.906@newssvr14.news.prodigy.com>

acatejr at gmail.com wrote:
> James Stroud wrote:
> 
>>acatejr at gmail.com wrote:
>>
>>>I have a text file that I am parsing.  Each line is of the form:
>>>
>>>max_time  0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
>>>
>>>The first item is the field name and the next twelve items are values
>>>for each month in the year.  There are multiple lines each for some
>>>different variable.  I am able to parse this data easily enough, but
>>>what I'd like to do is have a class that stores all this infomormation
>>>using dynamic member attributes/fields and the resulting list of
>>>values.  For example, if the class WeatherData was instantiated and I
>>>parsed the line above as so:
>>>
>>>field_name = "max_time;
>>>values = [0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
>>>
>>>how could I get weather data to store values in an attribute called
>>>"max_time"?  Ultimately, something like this would be possible:
>>>
>>>
>>>
>>>>>>WeatherData.max_time
>>>>>>[0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
>>>
>>>
>>>Any help would be appreciated.
>>>
>>
>>setattr(Weatherdata, "max_time", max_time)
>>
> Thanks a lot!!
> 
> I did find that creating and calling the following method works too:
> 
> def setAt(self, field, data):
>     expression = "self." + field + " = data"
>     exec(expression)
> 
> I just don't know which one would be more efficient, but I like setattr
> better.
> 

You have good taste. You probably want to steer away from exec() if you 
ever have the inclination. Python usually has an "approved", or 
pythonic, way of solving problems you may want to address with exec().

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From bdesth.quelquechose at free.quelquepart.fr  Thu Nov  2 16:07:49 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 02 Nov 2006 22:07:49 +0100
Subject: is mod_python borked?
In-Reply-To: <mailman.1672.1162489551.11739.python-list@python.org>
References: <mailman.1672.1162489551.11739.python-list@python.org>
Message-ID: <454a597f$0$3721$426a74cc@news.free.fr>

Michael S a ?crit :
> I used it for various projects. It's alright.
> The only problem I had, was that I was unable to get
> mod_python and pysqlite to work together.

Seems there's a strange bug with pysqlite when you have both 
mod_python/pysqlite and php5...


From antroy at gmail.com  Sat Nov 25 14:48:45 2006
From: antroy at gmail.com (Ant)
Date: 25 Nov 2006 11:48:45 -0800
Subject: Invoking Python from Cygwin problem.
In-Reply-To: <1164473686_17679@sp6iad.superfeed.net>
References: <1164385876.755749.139020@l39g2000cwd.googlegroups.com>
	<1164473686_17679@sp6iad.superfeed.net>
Message-ID: <1164484125.600450.236090@14g2000cws.googlegroups.com>


Cousin Stanley wrote:
...
>   Using Cygwin and Python 2.4 under Win2K the following version
>   of your code seems to work OK here with no extraneous CR ....

Hmm. Just tried it here at home (Python 2.5) and it works fine as
well... Cygwin was pre-installed on my machine when I started work at
the new job a couple of weeks ago. I wonder if it's an old version they
had installed. I'll try updating Cygwin at work and see what happens...



From sjdevnull at yahoo.com  Thu Nov  9 16:00:27 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 9 Nov 2006 13:00:27 -0800
Subject: [OT] Py3K idea: why not drop the colon?
In-Reply-To: <mailman.1989.1163097045.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1985.1163092232.11739.python-list@python.org>
	<1163092617.499298.326930@f16g2000cwb.googlegroups.com>
	<mailman.1989.1163097045.11739.python-list@python.org>
Message-ID: <1163106027.285495.135550@i42g2000cwa.googlegroups.com>

Steve Holden wrote:
> Paul Boddie wrote:
> > Steve Holden wrote:
> >> Paul Boddie wrote:
> >>> http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements
> >>>
> >> I suppose it would be even better if that hyperlink actually took you to
> >>   section 1.4.27 rather than 1.4.14 ...
> >
> > I'd suggest a browser upgrade: even the old version of Konqueror I'm
> > using here manages to scroll to the right place. And it isn't a Web
> > site maintenance problem, either, although I did have my suspicions.
> >
> YTes, IE copes with it but Firefox doesn't. Having heard a number of
> complaints about Firefox 2 I'm tempted to stick with 1.5.0.8 just a
> little longer.

FWIW, Firefox 2.0 and 1.5.0.7 both work properly on this link (as does
Epiphany 1.2.10).  Linux 2.6-based system.



From larry.bates at websafe.com  Mon Nov  6 17:03:31 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 06 Nov 2006 16:03:31 -0600
Subject: auto indent
In-Reply-To: <mailman.1816.1162844560.11739.python-list@python.org>
References: <mailman.1816.1162844560.11739.python-list@python.org>
Message-ID: <454FB133.5020708@websafe.com>

M.N.Smadi wrote:
> Hi there;
> 
> i have a script that is not indented properly. Is there a way that i can
> have it auto indented.
> 
> thanks
> moe smadi

Not really.  Indention in python conveys blocks so there is no way
anything automatic could determine where blocks end.  Its just like
asking if you could have something automatically insert parenthesis
everywhere they are needed.

-Larry



From johnjsal at NOSPAMgmail.com  Tue Nov  7 09:45:40 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 09:45:40 -0500
Subject: sqlite error?
In-Reply-To: <1162876815.281902.70620@e3g2000cwe.googlegroups.com>
References: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
	<1162849478.092439.297160@i42g2000cwa.googlegroups.com>
	<454faf0a$0$12993$c3e8da3@news.astraweb.com>
	<1162876815.281902.70620@e3g2000cwe.googlegroups.com>
Message-ID: <45509c05$0$26457$c3e8da3@news.astraweb.com>

Frank Millman wrote:

> Definitely not. You could have a sql command like this -
> 
> cur.execute("UPDATE table SET col1 = ?, col2 = ? WHERE col3 = ? AND
> col4 = ?",(1,2,3,4))
> 
> The parameters could be scattered throughout the command. Therefore the
> substitution is one-for-one from left to right using the values in the
> tuple.
>

Thanks! The example I was looking at in the docs didn't use parentheses, 
but I also didn't connect that with the fact that it was only using a 
one-tuple! :)


From carsten at uniqsys.com  Mon Nov 27 14:41:24 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 27 Nov 2006 14:41:24 -0500
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <Xns9888724C01B78OKB@199.45.49.11>
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr> <ekecd9$e8c$1@sea.gmane.org>
	<mailman.768.1164637881.32031.python-list@python.org>
	<Xns988896361B9C5duncanbooth@127.0.0.1>
	<Xns9888724C01B78OKB@199.45.49.11>
Message-ID: <1164656484.3361.15.camel@dot.uniqsys.com>

On Mon, 2006-11-27 at 19:14 +0000, OKB (not okblacke) wrote:
> Duncan Booth wrote:
> 
> >> And is there a mechanism in Python that will allow me to override
> >> the operators of a class, for all its occurrences, even the ones
> >> implemented on C built-in objects? 
> > 
> > No.
> 
>     	For what it's worth, which is undoubtedly nothing,

Correct.

>  this is 
> something that I think needs to change.  All this talk about new-style 
> classes and class-type unification is empty words if you can't override 
> anything on any type without having to know whether it's written in C or 
> Python.

Duncan's "No" response was not referring to overriding in general, it
was referring to the OP's original question which amounted to "Can I
affect the behavior of method Z by overriding methods X and Y".

The inability to influence a method by overriding completely different
methods has nothing to do with whether that method is implemented in C
or Python; it has to with whether the method in question calls the
overridden methods, and in general it won't.

You can change the behavior of a list's sort method by overriding sort.
You can't change the behavior of sort by overriding __getitem__ and
__setitem__, because sort does not call __getitem__ or __setitem__.

Hope this helps,

Carsten.




From chris.van.bael at gmail.com  Wed Nov  8 06:24:33 2006
From: chris.van.bael at gmail.com (Chris_147)
Date: 8 Nov 2006 03:24:33 -0800
Subject: Python deployment options.
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
Message-ID: <1162985073.163257.110180@m73g2000cwd.googlegroups.com>

king kikapu wrote:
> Hi to all folks here,
>
> i just bought a book and started reading about this language.
> I want to ask what options do we have to deploy a python program to
> users that do not have the labguage installed ??
>
> I mean, can i make an executable file, or something that contains the
> runtime and the modules that the program only use or am i forced to
> download the language to the user machine so the .py  files can be run
> ??
>
> Thanks in advance,
>
> king kikapu

Well, on Windows you have to look for the Py2Exe package
(www.py2exe.org)
On Mac OS X you can use Py2App
(http://undefined.org/python/py2app.html)

Mind you, on Windows there is one big potentional problem: Python is
compiled with Visual Studio 2003 and needs msvcr71.dll.  So Py2Exe
wants to distribute that dll also, but if you don't have a valid Visual
Studio license, you are not allowed to.
It is explained further in this thread:
http://groups.google.com/group/comp.lang.python/browse_frm/thread/bccb45b7dae7ddd5/dacec12e300a74d4#dacec12e300a74d4

I doubt Microsoft will unleash their lawyers on you, but it is a
problem.



From NikitaTheSpider at gmail.com  Wed Nov 29 15:55:57 2006
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Wed, 29 Nov 2006 20:55:57 GMT
Subject: Good script editor for Python on Mac OS 10.3
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
	<pecora-F96D92.15371029112006@ra.nrl.navy.mil>
Message-ID: <NikitaTheSpider-1CAAF2.15555629112006@news-rdr-02-ge0-1.southeast.rr.com>

In article <pecora-F96D92.15371029112006 at ra.nrl.navy.mil>,
 Lou Pecora <pecora at anvil.nrl.navy.mil> wrote:

> In article <1164830360.213197.182560 at l12g2000cwl.googlegroups.com>,
>  "Scott_Davies" <cloudrider9 at gmail.com> wrote:
> 
> > Hi,
> > 
> > I have an old Mac with OS X Panther installed.  I also have the Python
> > language download file, but I haven't got a text/script editor to use
> > for it.  Does anyone have a recommendation for a good Python text
> > editor in OS 10.3?
> > 
> > Thanks,
> > 
> > Scott D.
> > 
> 
> Try TextWrangler.  It's free.  I use it's big brother BBEdit and like it.

I second that recommendation.

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


From steve at rueb.com  Wed Nov 29 18:35:39 2006
From: steve at rueb.com (Steve Bergman)
Date: 29 Nov 2006 15:35:39 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <456e08ba$0$1505$db0fefd9@news.zen.co.uk>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e08ba$0$1505$db0fefd9@news.zen.co.uk>
Message-ID: <1164843339.129776.110420@j72g2000cwa.googlegroups.com>


Will McGugan wrote:

> Some trivial optimizations. Give this a whirl.


I retimed and got 9.7 average for 3 runs on my version.

Yours got it down to 9.2.

5% improvement. Not bad.

(Inserting '2' at the beginning doesn't seem to impact performance
much.;-) )

BTW, strictly speaking, shouldn't I be adding something to the floating
point sqrt result, before converting to int, to allow for rounding
error?  If it is supposed to be 367 but comes in at 366.99999999, don't
I potentially classify a composite as a prime?

How much needs to be added?



From fredrik at pythonware.com  Wed Nov 22 13:45:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 19:45:41 +0100
Subject: KeyboardInterrupt from syscalls
In-Reply-To: <1164220772.5961.53.camel@pc7.dolda2000.com>
References: <1164220772.5961.53.camel@pc7.dolda2000.com>
Message-ID: <ek25sl$4rl$1@sea.gmane.org>

Fredrik Tolf wrote:

> So how does it work? Does my code get to return Py_FALSE, and the
> interpreter ignores it, seeing that an exception is set? Is a non-local
> exit performed right over my call stack (in which case my next question
> would be how to clean up resources being used from my C code)? Or does
> something completely else happen?

the signal handler adds an entry to a "pending calls" queue, which is 
checked by the interpreter at regular intervals.

</F>



From no-spam at no-spam-no-spam.invalid  Sun Nov  5 08:43:47 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 05 Nov 2006 14:43:47 +0100
Subject: Trouble compiling win32all on Windows
In-Reply-To: <1162687975.665327.107030@m7g2000cwm.googlegroups.com>
References: <eiih1o$1jd$1@news.albasani.net>
	<1162687975.665327.107030@m7g2000cwm.googlegroups.com>
Message-ID: <eikpqj$7i0$1@news.albasani.net>

Ross Ridge wrote:
> robert wrote:
>> I've trouble compiling win32all. VC98 and latest SDK installed
>> (otherwise with original SDK it won't even compile).
>> It tells that uuid.lib(cguid_i.obj) : fatal error LNK1103: debug info
>> is destroyed.
> 
> The library isn't compatable with the compiler you're using.  You'll
> need to use an older version of the Platform SDK that supports your
> compiler.

thanks. the last Windows SDK supporting VC6 (Py2.3) is February 2003 Edition. 

If someone seeks here:

MS' front pages tell you need to get it via CD. 
Yet this SDK exists (well hidden) on the net here:

http://www.microsoft.com/msdownload/platformsdk/sdkupdate/psdk-full.htm

wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.1.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.2.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.3.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.4.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.5.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.6.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.7.cab

wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.8.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.9.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.10.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.11.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.12.cab
wget http://download.microsoft.com/download/platformsdk/sdk/update/win98mexp/en-us/3790.0/FULL/PSDK-FULL.13.cab


one needs to set IE as default browser during installation. otherwise setup.exe will fail.

robert


From richardjones at optushome.com.au  Thu Nov  9 22:03:14 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Fri, 10 Nov 2006 14:03:14 +1100
Subject: Registrations are open for tutorials at OSDC 2006
Message-ID: <200611101403.14997.richardjones@optushome.com.au>

Time is running out to register for tutorials at the Open Source
Developers' Conference 2006 tutorial program:

        http://www.osdc.com.au/registration/index.html

The tutorials run on the 5th December, followed by the technical program on
the 6th - 8th December.  Most tutorials include printed reference material.
Our tutorial program is included below:

                Room 1                             Room 2

 9:00am Cascading Style Sheets             Open Source Python GIS Hacks
12:30pm         Lunch                              Lunch
 1:30pm Test Web Apps with Perl            Drupal Tutorial
 3:00pm      Afternoon tea                      Afternoon tea
 3:30pm Intro to Perl Template::Toolkit    Large Scale Web Apps

A morning tea break will occur roughly half way through the the 9am -
12:30pm tutorials.

For more information on what each tutorial covers, please visit:

        http://www.osdc.com.au/papers/tutorials.html

Prices and information on how to register can be found at:

        http://www.osdc.com.au/registration/index.html

You can help us make this conference be the best developers' conference
this year just by turning up and participating!  We look forward to sharing
this great conference with you.

If your business would like to benefit from exposure to many of Australia's
best open source developers then perhaps you should consider sponsorship.
We have a wide range of sponsorship options, to find out more information
please visit: http://www.osdc.com.au/sponsors/index.html

        Richard Jones
        OSDC Program Chair


From claird at lairds.us  Wed Nov 15 21:41:34 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 16 Nov 2006 02:41:34 +0000
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
Message-ID: <unvs24-8fi.ln1@lairds.us>

In article <1163559359.010787.185840 at m73g2000cwd.googlegroups.com>,
Luis M. Gonz?lez <luismgz at gmail.com> wrote:
			.
			.
			.
>Then look no further. Learn python and go kick php developers asses in
>the market place.
>There are thousands of php developers out there. Do you want to be just
>one more?
>I'd rather learn something newer, and much more powerful.
			.
		[more Python 
		cheerleading]
			.
			.
Perhaps it's timely to clarify the "newer" above:  Guido 
made Python public in '89-90, and Rasmus showed PHP to 
others in '94-95.


From fredrik at pythonware.com  Thu Nov 16 08:08:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 14:08:27 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163681949.338244.323390@k70g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
Message-ID: <ejhnsa$k3u$1@sea.gmane.org>

Luis M. Gonz?lez wrote:

> But as a web development language, it's olnly when people started to
> look for the "rails killer" and many python alternatives started to
> come up (although Django has been in development for a long time before
> all this hype).

nah, people have built web stuff on Python for as long as we've had a web.

</F>



From craigtw.online at gmail.com  Thu Nov 30 22:14:56 2006
From: craigtw.online at gmail.com (Craig)
Date: 30 Nov 2006 19:14:56 -0800
Subject: Open 16-bit/24-bit windows bitmap using PIL
Message-ID: <1164942896.485414.192320@16g2000cwy.googlegroups.com>

Hi there,

I'm trying to open a 256-colour windows BMP and a 24-bit windows BMP
with PIL usiing the following command:

Image.open("image.bmp")

When I try and open the 24-bit BMP the error I get is:

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    im = Image.open("lightbulb.bmp")
  File "C:\Python25\lib\site-packages\PIL\Image.py", line 1730, in open
    return factory(fp, filename)
  File "C:\Python25\lib\site-packages\PIL\ImageFile.py", line 82, in
__init__
    self._open()
  File "C:\Python25\lib\site-packages\PIL\BmpImagePlugin.py", line 164,
in _open
    self._bitmap(offset=offset)
  File "C:\Python25\lib\site-packages\PIL\BmpImagePlugin.py", line 96,
in _bitmap
    raise IOError("Unsupported BMP header type (%d)" % len(s))
IOError: Unsupported BMP header type (108)

When I try and open the 256-colour BMP the error I get is:

Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    im = Image.open("lightbulb2.bmp")
  File "C:\Python25\lib\site-packages\PIL\Image.py", line 1730, in open
    return factory(fp, filename)
  File "C:\Python25\lib\site-packages\PIL\ImageFile.py", line 82, in
__init__
    self._open()
  File "C:\Python25\lib\site-packages\PIL\BmpImagePlugin.py", line 164,
in _open
    self._bitmap(offset=offset)
  File "C:\Python25\lib\site-packages\PIL\BmpImagePlugin.py", line 120,
in _bitmap
    raise IOError("Unsupported BMP compression (%d)" % compression)
IOError: Unsupported BMP compression (1)

I can open a windows monochrome bitmap fine using PIL but the colour
options are more desirable.  I am using Windows 2000 if that is any
help and I am saving the different BMP's using Microsoft Paint.  If you
could help that would be great.


Craig



From bignose+hates-spam at benfinney.id.au  Thu Nov  2 20:14:09 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 03 Nov 2006 12:14:09 +1100
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>
	<1162478431.624590.29290@m7g2000cwm.googlegroups.com>
	<mailman.1667.1162483361.11739.python-list@python.org>
	<1162484302.234145.245320@e3g2000cwe.googlegroups.com>
	<mailman.1670.1162486194.11739.python-list@python.org>
	<1162515037.427613.279250@i42g2000cwa.googlegroups.com>
Message-ID: <873b9149i6.fsf@benfinney.id.au>

"eduardo.padoan at gmail.com" <eduardo.padoan at gmail.com> writes:

> Python should have a TypeError subclass: "NotCallableError", to
> enforce BAFP.

Bureau of Alcohol, Firearms, and Programmers?

(Perhaps you meant "EAFP")

-- 
 \       "If you go flying back through time and you see somebody else |
  `\   flying forward into the future, it's probably best to avoid eye |
_o__)                                        contact."  -- Jack Handey |
Ben Finney



From john at castleamber.com  Thu Nov 16 15:04:22 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 20:04:22 GMT
Subject: Python v PHP: fair comparison?
References: <mailman.282.1163702532.32031.python-list@python.org>
Message-ID: <Xns987D8F275B953castleamber@130.133.1.4>

"Demel, Jeff" <Jeff.Demel at JavelinDirect.com> wrote:

> What kind of hosting does one get for $10 a *year*?  And I'm not just
> talking Python here, but any hosting at all.

I pay $12/year (see other posts, I am not going to name them again) for 
hosting a phpBB board and wiki, with 100+ members and currently close to 
20,000 posts. Minor issues were fixed within about one hour after emailing 
the hosting provider. When I had problems with data storage (my fault, I 
used too much) my 100 MB was extended to 500 MB without additional costs. 

Haven't seen major issues the one year and half the board is up, 
everything goes smooth. No idea how a heavy traffic site would go with 
them though, my personal page with 14k visitors is hosted somewhere else, 
and I pay much more (maybe even too much atm., I am probably going to move 
to VPS anyway).

But for a message board for friends, paying less then 20 USD/year, is fine 
with me. One friend has her own board & blog with them, and since hosting 
comes with cpanel, she didn't need much of my help :-).

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From __peter__ at web.de  Thu Nov  2 09:52:25 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 02 Nov 2006 15:52:25 +0100
Subject: __div__ not recognized automatically
References: <eicmj4$sak$1@gwdu112.gwdg.de>
Message-ID: <eid0n3$5ko$03$1@news.t-online.com>

Anton81 wrote:

> Hello!
> 
> I wrote a class
> 
> class NumX:
>   ...
>   def __add__(self,other):
>     ...
>   def __div__(self,other):
>     if not isinstance(other,NumX): other=NumX(other)
>     ...
> 
> Somewhere else I use
> 
> a=(b+c)/2
> 
> where all variables are of NumX Type. When I execute the program it
> complains that it can't find an operator "/" for "instance" and "integer".
> However if I use pdb the same command works when started on the prompt.
> Also the manual execution
> 
> a=(b+c).__div__(2)
> 
> works. Any suggestions what goes wrong?

If you have the

from __future__ import division

statement, you need to override __truediv__(), not __div__()

Peter


From tzong at sigma-rt.com  Wed Nov 29 20:03:18 2006
From: tzong at sigma-rt.com (Tommy Zong)
Date: Thu, 30 Nov 2006 09:03:18 +0800
Subject: [help] Is it true to call obj.__str__() while executing "print obj"?
Message-ID: <20061130011050.228691E4003@bag.python.org>

Hi,

 

I am learning metaclass by reading "Metaclass programming in Python, Part
2". I have a question as following and had tried to search from internet and
also have read the article "Unifying types and classes in Python 2.2" but
failed to get satisfied answer. Could you please give me any comments to
enlighten me? Thank you very much.

 

{{{

#

#         inheritance         inheritance

# object -------------> type -------------> Printable(Printable.__str__)

#   |                                           .

#   |                                           . instantiation

#   |                                           .

#   |                                           v

#    ----------------------------------------> C(?)

#                                               .

#                                               . instantiation

#                                               .

#                                               v

#                                              c(?)

#

>>> class Printable(type):

...   def __str__(cls):

...     return "This is class %s" % cls.__name__

...

>>> class C(object):

...   __metaclass__ = Printable

...

>>> print C                                       # equivalent to print
Printable.__str__(C)

This is class C

>>> c = C()

>>> print c                                       # equivalent to print
C.__str__(c)

<__main__.C object at 0x1870dacc>

 

>>> C.__str__

<slot wrapper '__str__' of 'object' objects>

>>> print C

This is class C

}}}

 

The question is why Printable.__str__ is invoked while executing "print C"
but "C.__str__" shows it is resolved as "objct.__str__"? 

 

Wish I can get reply from you. Really thanks.

 

Best Regards,


Tommy Zong
Chengdu Jiehua Technologies Co, Ltd.
Tel: 86-28-85148500-654
Mail:  <mailto:tzong at sigma-rt.com> tzong at sigma-rt.com
MSN:  <mailto:metalzong at 163.com> metalzong at 163.com

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From gagsl-py at yahoo.com.ar  Mon Nov  6 17:21:04 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 06 Nov 2006 19:21:04 -0300
Subject: Projecting MUD maps
In-Reply-To: <740c3aec0611051432v4bb92f2gc7fa7a933954f64f@mail.gmail.com
 >
References: <740c3aec0611051432v4bb92f2gc7fa7a933954f64f@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061106191847.0493e930@yahoo.com.ar>

At Sunday 5/11/2006 19:32, BJ?rn Lindqvist wrote:

>Hello, I'm looking for an algorithm to project "MUD maps" such as the
>following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg
>
>MUD:s consists of rooms, each rooms has up to four orthogonal edges
>(north, east, west and south) that connects it to another room. So it
>is very easy to model a MUD as a directed graph. But projecting the

You could use dot www.graphviz.org
I think there is a python wrapper -pydot maybe?- 
but anyway the dot file format is very easy to write.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From gagsl-py at yahoo.com.ar  Thu Nov  2 18:34:16 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Nov 2006 20:34:16 -0300
Subject: scared about refrences...
In-Reply-To: <1162506227.070059.230550@h54g2000cwb.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
	<454a5672$0$3721$426a74cc@news.free.fr>
	<1162506227.070059.230550@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061102193336.05c2dd88@yahoo.com.ar>

At Thursday 2/11/2006 19:23, SpreadTooThin wrote:

>I realize I may be beating a dead horse here... but...
>
>def fn(x):
>    x = x + 1
>    print x
>a = 2
>fn(a)
> >>> 3
>print a
> >>> 2
>
>So in some cases the it is safe to assume that your variables to
>function will not
>change in other cases it is not.. but they are all the same...

Forget about variables!
In Python you have objects. Objects don't have a name, but you may 
use a name to refer to them.
In the code above, `a` is not a variable, neither an object; it's 
just a name referring to an object (a name bound to an object); such 
object is  an instance of type int, with value 2, to be precise. 
fn(a) calls function fn [in fact, "the object bound to the name fn"] 
passing an object -the object referenced by the name `a`- as its only argument.
Inside function fn, it gets a single argument bound to the name x. 
You do some math and bind the resulting object to the local name `x`. 
Now x refers to another instance of type int, with value 3. The 
original int object is not modified - and never could have been, 
since int's are immutable, you cant change them (a 2 will always be a 
2: if you get a 3, it's ANOTHER object).
After function fn finishes, execution continues with the `print a` 
statement. Nobody has changed the object pointed by the name `a`, so 
it's still the int with value 2, and that's what you get.

All objects have identity. You can test identity using the `is` 
operator: `a is b` returns True iff both objects are identical (both 
are "the same object" just being referred by another name). The 
function id() returns the object identity.

Some objects (by example, containers like lists and dicts) are 
mutable. That means that you can change it's value, but the remain 
being the same object. By example:

--- begin test.py ---
def g(x):
   print 'x[1], in:', x[1]
   x[1] = 10
   print 'x[1], out:', x[1]

a1=1
a2=2
a3=3
foo=[a1,a2,a3]
print "before, foo=",foo,"id(foo)=",id(foo)
print "a2=",a2,"id(a2)=",id(a2)
g(foo)
print "after, foo=",foo,"id(foo)=",id(foo)
print "a2=",a2,"id(a2)=",id(a2)
--- end test.py ---
Output:

before, foo= [1, 2, 3] id(foo)= 12350728
a2= 2 id(a2)= 11163404
x[1], in: 2
x[1], out: 10
after, foo= [1, 10, 3] id(foo)= 12350728
a2= 2 id(a2)= 11163404

Function g modifies the second "slot" in the list - it does not 
modify the object already in that place, it just makes the second 
item in the list to refer to another object (the int 10). The 
previous reference (the int 2) is lost.
Anyway, the list remains "the same" (look at id(foo)).
The name a2 still refers to the int 2 (because nobody changed that).

It's really easy once you get it - and then, just enjoy writing Python code!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From no-spam at no-spam-no-spam.invalid  Sat Nov  4 07:44:09 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 04 Nov 2006 13:44:09 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <454bd36c$0$2364$9b622d9e@news.freenet.de>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
Message-ID: <eii1ur$a60$1@news.albasani.net>

Martin v. L?wis wrote:
> robert schrieb:
>> in combination with some simple locking (anyway necessary) I don't see a
>> problem in ref-counting.
> 
> In the current implementation, simple locking isn't necessary.
> The refcounter can be modified freely since the code modifying
> it will always hold the GIL.

( meant: a lock to prevent multiple Interpreters accessing concurrently the hot shared/tunneled objects )

>> ---- Question Besides:  do concurrent INC/DEC machine OP-commands
>> execute atomically on Multi-Cores as they do in Single-Core threads?
> 
> Not necessarily, no. On x86, you need to prefix the instruction
> with the LOCK prefix for it to become atomic. Otherwise, the
> two necessary read/write cycles to main memory may interleave
> with the memory operations of another processor.
> 
> On other processors, INC <mem> might not exist at all as an
> instruction; when you only have register add, then implementing
> an atomic increment is a challenge. That's why the Windows API
> provides you with an atomic increment function as part of the
> operating system API.

Thanks for that info. That is interesting.
Thus even on x86 currently this LOCK is not used  (just	(op)->ob_refcnt++) )

Reading this I got pinched: 
In win32ui there are infact Py_INC/DECREF's outside of the GIL !
And I have a severe crash problem with threaded apps - the problem is only only on dual cores !
That pointer probably will end a long search...


robert


PS: Besides: what are speed costs of LOCK INC <mem> ?


From john106henry at hotmail.com  Thu Nov  9 15:06:47 2006
From: john106henry at hotmail.com (John Henry)
Date: 9 Nov 2006 12:06:47 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163092380.301382.113470@m7g2000cwm.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
Message-ID: <1163102807.741768.195310@m73g2000cwd.googlegroups.com>


Dan Lenski wrote:
>
> John H.: thanks for pointing out pythoncard.  This looks like it might
> be an excellent substitute for LabView-like GUIs, which all my
> coworkers like.  I personally refuse to read or write LabView code, on
> the grounds that its syntax causes severe brain damage and is
> completely unportable.  But that's a flame for another thread, so to
> speak...
>
> Thanks,
> Dan

I assume you meant that the example programs looks LabView-like GUIs?
PythonCard itself has nothing in common with LabView.   It's more like
HyperCard.



From nirnimesh at gmail.com  Thu Nov  2 07:52:05 2006
From: nirnimesh at gmail.com (Nirnimesh)
Date: 2 Nov 2006 04:52:05 -0800
Subject: urllib2: HTTP Version not supported
Message-ID: <1162471925.780264.315870@f16g2000cwb.googlegroups.com>

I'm using urllib2 module to fetch a URL from a server which understands
HTTP/1.1 only (no HTTP/1.0).

urllib2.urlopen() results in "urllib2.HTTPError: HTTP Error 505: HTTP
Version not supported".

How do I force urllib2 to use HTTP v1.1?

Regards,
Nirnimesh



From breakfastea at gmail.com  Thu Nov  9 09:37:55 2006
From: breakfastea at gmail.com (Camellia)
Date: 9 Nov 2006 06:37:55 -0800
Subject: UnboundLocalError
Message-ID: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>

hi all

why it generates an "UnboundLocalError" when I do the following:

<code>
...
def main():
    number = number()
    number_user = user_guess()
    while number_user != number:
        check_number(number = number, number_user = number_user)
        number_user = user_guess()

UnboundLocalError: local variable 'number' referenced before assignment
</code>

I found when I changed the number() to num() or whatever the issue
solved
but doesn't every function has its own namespace?
Can anyone please explain it to me?

Peace



From skip at pobox.com  Thu Nov  2 10:43:41 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 2 Nov 2006 09:43:41 -0600
Subject: string formatter for tuple
In-Reply-To: <454A126F.6040402@tim.thechases.com>
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
	<454A126F.6040402@tim.thechases.com>
Message-ID: <17738.4653.362067.524738@montanaro.dyndns.org>

>>>>> "Tim" == Tim Chase <python.list at tim.thechases.com> writes:

    >> How can I print a tuple with a single string format?

    Tim>        print "a = %s" % str(a)
    Tim> or
    Tim>        print "a = %s" % repr(a)

Or wrap the tuple in a tuple:

    print "a = %s" % (a,)

Skip


From phil_nospam_schmidt at yahoo.com  Sun Nov 26 00:23:30 2006
From: phil_nospam_schmidt at yahoo.com (Phil Schmidt)
Date: 25 Nov 2006 21:23:30 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
	<1164504562.834005.197830@l39g2000cwd.googlegroups.com>
Message-ID: <1164518610.895461.252690@45g2000cws.googlegroups.com>

sturlamolden wrote:

> Using Python just for the sake of using Python is silly.

Well, that kind of gets right to my point. Does the "added" effort with
Python to interface with data acquisition hardware really result in
less productivity? I am very familiar with Matlab, Labview, and Python,
and frankly, Python is the most productive and powerful programming
language of the three. But it's the hardware compatibility thing that
concerns me with Python.

It seems the answers are hard to come by on this issue. I sure would be
willing to give it a try, except that I'm getting paid to get a job
done, not to tinker around with Python and DAQ hardware. But if
tinkering around could save my project money on commercial software,
and still get it done on schedule, it would be a big win. I just don't
have confidence that it would.

Phil



From p.lavarre at ieee.org  Thu Nov  9 19:54:44 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 16:54:44 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
	<1163115840.190634.5800@m73g2000cwd.googlegroups.com>
Message-ID: <1163120084.037904.250990@h48g2000cwc.googlegroups.com>

> Help, what did you mean by the question?

How does Python express the idea:

i) Produce the six bytes '\x08' '\x01\x23\x45' '\x80' '\0' at run-time
when given the tuple (0x08, 0x12345, 0x80, 0).

ii) Produce the six bytes '\x12' '\0\0\0' '\x24' '\0' when given the
tuple (0x12, 0, 0x24, 0).

iii) And so on.

So far, everything I write is ugly.  Help?

> Looks like you ignored ...

I guess you're asking me to leave the mystery of my question alone long
enough to show more plainly that indeed I am trying to make sense of
every word of every answer.

I guess I should do that in separate replies, cc'ed back into this same
thread.  Please stay tuned.

Thanks in advance, Pat LaVarre



From larsnostdal at gmail.com  Thu Nov  2 00:58:43 2006
From: larsnostdal at gmail.com (=?iso-8859-1?q?Lars_Rune_N=F8stdal?=)
Date: Thu, 02 Nov 2006 06:58:43 +0100
Subject: logo design
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
	<1162432978.995731.291980@f16g2000cwb.googlegroups.com>
	<oWd2h.120$Rj2.118@newsfe10.lga>
	<1162442892.041281.321270@i42g2000cwa.googlegroups.com>
	<pan.2006.11.02.05.07.58.393443@gmail.com>
Message-ID: <pan.2006.11.02.05.58.42.556405@gmail.com>

On Thu, 02 Nov 2006 06:08:00 +0100, Lars Rune N?stdal wrote:

> On Wed, 01 Nov 2006 20:48:12 -0800, Geoffrey Summerhayes wrote:
> 
>> Picture this: Hey, I'm switching to COBOL because its new
>> logo looks great on t-shirts and mugs.
> 
> Maybe the extra funding would improve "COBOL" and its libraries faster by
> letting a developer work more often on it.

(and you'd switch to "COBOL" later down the road because of this)

> 
> I'm not totally serious; but maybe some way of donating money to further
> improvement of SBCL/Slime/something-cool-and-universally-needed-here would
> be OK or something.
> 
> ..I need a new t-shirt anyways; the Ubuntu t-shirt has gone missing.. :(
-- 
Lars Rune N?stdal
http://lars.nostdal.org/



From steve at holdenweb.com  Thu Nov  9 08:36:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 07:36:17 -0600
Subject: assigning values in __init__
In-Reply-To: <pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>	<4550daa6$0$26446$c3e8da3@news.astraweb.com>	<mailman.1865.1162939573.11739.python-list@python.org>	<4551fe01$0$7047$c3e8da3@news.astraweb.com>	<mailman.1948.1163035654.11739.python-list@python.org>
	<pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>
Message-ID: <eivaq8$799$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Thu, 09 Nov 2006 12:27:12 +1100, Ben Finney wrote:
> 
>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>>
>>> Ben Finney wrote:
>>>> If you pass a *mapping* of the
>>>> "I-might-want-to-add-more-in-the-future" values, then you get both
>>>> explicit *and* expandable, without an arbitrary unneeded sequence.
>>> Do you mean by using the **kwargs parameter?
>> No. 
> 
> Well, that'll teach me to put words in your mouth.
> 
> [snip]
>> If you have a group of named, semantically-related, unsequenced values,
>> pass them into the function as a mapping object (a dict object).
> 
> Still, if you are doing this:
> 
> mapping_object = {"strength": roll_dice(10),
>     "intelligence":roll_dice(10),
>     "dexterity":roll_dice(10)}
> my_character = Character(mapping_object)
> 
> then there is little benefit to building the dict just for the purposes of
> passing it to Character(), never to use it again, not when you can do this:
> 
> my_character = Character(strength: roll_dice(10), 
>     intelligence:roll_dice(10), dexterity:roll_dice(10))
> 
Except, of course, that you *can't* do that: I think you meant to use 
equals signs instead of colons?

> If you happen to already have collected your character attributes in a
> mapping object for some other reason, then well and good, pass it into the
> function. Otherwise, well, I believe the correct container for
> character attributes is a Character, not a dict.
> 
regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fdjcomp at yahoo.com  Wed Nov  1 23:07:32 2006
From: fdjcomp at yahoo.com (frederik aa de jonge)
Date: Thu, 02 Nov 2006 04:07:32 +0000
Subject: module for calculations involving radioactive decay?
Message-ID: <45496e67$0$10073$a729d347@news.telepac.pt>

does anybody know of a package/module which will facilitate/simplify
calculations with radioactive samples?
as a minimum spec:
- user definable list of radionuclides + names + halflives (expressable in
time units like sec min etc as appropriate)
- choice of units (Bq or Ci, with appropriate modifiers kGM etc
- initial activity at given time (sample calibration)
- activity calculation at other times, taking into account timezones
- operators: add, subtract to simulate adding or removing activity
(needs an "history" mechanism, so that activity at time T is always
correctly calculated)

any help kindly appreciated
Frederik 







From antroy at gmail.com  Thu Nov  9 07:02:05 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 04:02:05 -0800
Subject: Exception Handling in TCPServer (was;
	Problem exiting application in Windows Console.)
In-Reply-To: <mailman.1920.1163012508.11739.python-list@python.org>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
	<1163001245.707034.310900@f16g2000cwb.googlegroups.com>
	<1163007018.221972.93580@b28g2000cwb.googlegroups.com>
	<mailman.1920.1163012508.11739.python-list@python.org>
Message-ID: <1163073725.471882.225700@h48g2000cwc.googlegroups.com>

Steve Holden wrote:
...
> First of all, five hour response time is a high expectation, you must be
> a Platinum customer :-)

I'm in the last week of my current job - start a new one on Monday, and
so I haven't got a great deal to do at the moment. Five hours is a
lifetime when you're staring at a newsgroup waiting for it to change
;-)

> Secondly, while a try/except catching all exceptions *is* unusual it's
> justifiable in a server context (though some logging and/or analysis
> certainly wouldn't go amiss).

True. And I'd expected that the exception ought to be passed to the
handle_error method so that something could be done with it there. This
morning however I discovered that Guido's been in his time machine
since yesterday and provided the very useful sys.exc_info() function
for this very purpose!

> Thirdly your "ugly hack" *could* be replaced by something cleaner with
> more analysis of the trace structure, but given how infrequently this
> code is going to run and the low probability that anything else will
> trigger the hook I'd be happy with it as it is. But that's just me ...

The sys.exc_info()  was what I was looking for it turns out, I can get
the exception type from that instead of trying to parse the stack
trace.

However:

Gabriel Genellina wrote:
...
> Replace serve_forever with your own loop checking an exit flag, and
> set the flag in your "quit.html" handler instead of sys.exit(0)

This is the approach I decided to go for. I found that RequestHandler
objects have a reference to its server that I can use to control the
server.

Thanks for the input chaps!



From tleeuwenburg at gmail.com  Tue Nov 28 21:55:38 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 28 Nov 2006 18:55:38 -0800
Subject: HTML Table-of-Content Extraction Script
In-Reply-To: <mailman.806.1164731186.32031.python-list@python.org>
References: <ekh4bn$782$1@news.albasani.net>
	<mailman.806.1164731186.32031.python-list@python.org>
Message-ID: <1164768938.421866.158160@14g2000cws.googlegroups.com>


Fredrik Lundh wrote:
> robert wrote:
>
> > I'm looking for a function which extracts a table of contents
>  > of HTML file(s) from <Hx....><a name=...></a>...</Hx>
>  > and possibly auto-creates the ancors.
> > Maybe something already exists?
>
> that's the kind of stuff you'll write in approximately two minutes using
> BeautifulSoup (or if you prefer the ElementTree API, ElementSoup).
>
> start here:
>
>      http://www.crummy.com/software/BeautifulSoup/
> 
> </F>

splity does that, but it's not Python.

Cheers,
-T



From steve at holdenweb.com  Thu Nov  9 16:01:46 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 15:01:46 -0600
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163103151.772022.300950@k70g2000cwa.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>	<1163102807.741768.195310@m73g2000cwd.googlegroups.com>
	<1163103151.772022.300950@k70g2000cwa.googlegroups.com>
Message-ID: <ej04ti$fm1$1@sea.gmane.org>

Dan Lenski wrote:
> John Henry wrote:
>> I assume you meant that the example programs looks LabView-like GUIs?
>> PythonCard itself has nothing in common with LabView.   It's more like
>> HyperCard.
> 
> That's right, I'm saying the GUIs *produced* by PythonCard look like
> those produced by LabView.  Believe me, if the PythonCard programming
> style had anything to do with LabView, I'd avoid it like the plague =)
> 
> In any case, I think I'm gonna give PythonCard a shot before trying
> full-fledged wxPython.  It looks ideal for my needs.
> 
You may find that it starts out fine, but becomes less satisfactory as 
the sophistication of your interfaces increases. Then the problem will 
be that migration to another platform demands a substantial rewrite of 
your application (I have done this for a fairly small app).

I don't think PythonCard gets much maintenance nowadays.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From nicolasg at gmail.com  Wed Nov  8 18:35:31 2006
From: nicolasg at gmail.com (NicolasG)
Date: 8 Nov 2006 15:35:31 -0800
Subject: Python to tell what is the IP of my PC .
Message-ID: <1163028931.055027.170040@h48g2000cwc.googlegroups.com>

How can I use python to get the real IP address of my DSL router (when
my PC is part of the local home LAN) ?



From istvan.albert at gmail.com  Thu Nov 30 11:20:16 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 30 Nov 2006 08:20:16 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164874749.914101.32410@16g2000cwy.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164874749.914101.32410@16g2000cwy.googlegroups.com>
Message-ID: <1164903616.527678.15410@f1g2000cwa.googlegroups.com>

gavino wrote:

> I want to learn to program and I can't seem to pick a direction.  A

Learning how to program and learning a programming language are
completely different things.

The former far more difficult then the latter. There is nothing better
than Python to learn how to program because it is simple and lets you
focus on modeling the problem.

> experience sees only java people making money.. aggkk!!

Nonsense, learning languages is easy, going from Python to Java is easy
(but annoying of course)
Worry about learning how to program, later you can pick any language
you think migh make you rich.

i.



From fredrik at pythonware.com  Sun Nov 26 06:37:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 12:37:38 +0100
Subject: Dynamic function execution
In-Reply-To: <8t1n34-qsv.ln1@lairds.us>
References: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>	<mailman.718.1164469686.32031.python-list@python.org>
	<8t1n34-qsv.ln1@lairds.us>
Message-ID: <ekbua2$6ct$1@sea.gmane.org>

Cameron Laird wrote:

> ?  Or am I missing the point that a better example of what 
> Mr. Wu really wants is
> 
>   def func(seconds = None, minutes = None, hours = None):
>       print seconds
>       print minutes
>       print hours
> 
>   dimension = "minutes"
>   func(**{dimension: 30})

I assumed that the OP was looking for a mechanism that allowed him to 
use strings for parameter names, not that he wasn't able to replace a
literal with a variable once he knew what mechanism to use...

</F>



From ogbash at gmail.com  Thu Nov 30 18:28:24 2006
From: ogbash at gmail.com (Oleg Batrashev)
Date: 30 Nov 2006 15:28:24 -0800
Subject: best way to align words?
In-Reply-To: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
Message-ID: <1164929304.896328.24560@79g2000cws.googlegroups.com>


> i would like to write a piece of code to help me to align some sequence
> of words and suggest me the ordered common subwords of them
Im not sure what you want, but in case you are guy who knows how
quicksort and Djikstra algorithms work :) and wants to find out more.

There are many algorithms out there, discovered on "Text algorithms"
univesity course. The first one does not directly solve your problem -
"edit distance" (Levenshtein distance)
http://en.wikipedia.org/wiki/Levenshtein_distance
I mention it here only because it is simple and shows basic idea of
Dynamic Programming
http://en.wikipedia.org/wiki/Dynamic_programming

If you scroll down you'll see "Longest common subsequence problem" with
implementation in Python for 2 sequences. If you dont understand how it
works just look into "edit distance" idea and see it is exactly the
same algorithm with changed rules.

Oleg



From steve at holdenweb.com  Fri Nov 10 13:25:02 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 12:25:02 -0600
Subject: comparing Unicode and string
In-Reply-To: <slrnel8v1a.1r8.horpner@FIAD06.norwich.edu>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>	<mailman.830.1161338118.11739.python-list@python.org>	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>	<pan.2006.10.23.10.15.24.383843@gmx.net>	<1163120577.369133.279080@h48g2000cwc.googlegroups.com>
	<slrnel8v1a.1r8.horpner@FIAD06.norwich.edu>
Message-ID: <ej2g3l$vb6$1@sea.gmane.org>

Neil Cerutti wrote:
> On 2006-11-10, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
>> Marc 'BlackJack' Rintsch wrote:
>>> Why?  Python strings are *byte strings* and bytes have values in the range
>>> 0..255.  Why would you restrict them to ASCII only?
>> Because getting an exception when comparing a string with a unicode
>> string is irritating.
>>
>> But I don't insist on my PEP. The example just shows just
>> another pitfall with Unicode and why I'll advise to any
>> beginner: Never write text constants that contain non-ascii
>> chars as simple strings, always make them Unicode strings by
>> prepending the "u".
> 
> That doesn't do any good if you aren't writing them in unicode
> code points, though.
> 
You tell the interpreter what encoding your source code is in. It then 
knows precisely how to decode your string literals into Unicode. How do 
you write things in "Unicode code points"?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From powernews at libero.it  Mon Nov 27 08:01:03 2006
From: powernews at libero.it (halex2000)
Date: Mon, 27 Nov 2006 13:01:03 GMT
Subject: working with files and directories
References: <7IAah.58105$uv5.416763@twister1.libero.it>
	<2YAah.18835$Sw1.13785@newssvr13.news.prodigy.com>
Message-ID: <jkBah.58161$uv5.417283@twister1.libero.it>


"Bryan Olson" <fakeaddress at nowhere.org> ha scritto nel messaggio 
news:2YAah.18835$Sw1.13785 at newssvr13.news.prodigy.com...
> halex2000 wrote:
>> Hi all, I'm new with Python, and I thought to use it to automatically 
>> rename some files in a directory, but I don't know where should I search 
>> the functions: to get all the files of a directory, to rename the files 
>> and so on.
>
> Python programmers are constantly looking at:
>
>     http://docs.python.org/lib/lib.html
>
> In this case, see 14.1.4, 11.1, and 11.10.
>
> Happy hacking.
>
> -- 
> --Bryan
>
Thank you very much :-) 




From martin at v.loewis.de  Sun Nov 19 18:07:26 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Mon, 20 Nov 2006 00:07:26 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
Message-ID: <4560E3AE.5030307@v.loewis.de>

gabor schrieb:
> 1. simply fix the documentation, and state that if the file-name cannot
> be decoded into unicode, then it's returned as byte-string. 

For 2.5, this should be done. Contributions are welcome.

[...then]
> [os.path.join(path,n) for n in os.listdir(path)]
> 
> will not work.
> 
> 2. add support for some unicode-decoding flags, like i wrote before

I may have missed something, but did you present a solution that would
make the case above work?

> 3. some solution.

One approach I had been considering is to always make the decoding
succeed, by using the private-use-area of Unicode to represent bytes
that don't decode correctly.

Regards,
Martin


From jseigh_01 at xemaps.com  Tue Nov  7 09:06:59 2006
From: jseigh_01 at xemaps.com (Joe Seigh)
Date: Tue, 07 Nov 2006 09:06:59 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7xk62ct5pf.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
Message-ID: <G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>

Paul Rubin wrote:
> robert <no-spam at no-spam-no-spam.invalid> writes:
> 
>>>I don't want to discourage you but what about reference
>>>counting/memory
>>>management for shared objects? Doesn't seem fun for me.
>>
>>in combination with some simple locking (anyway necessary) I don't
>>see a problem in ref-counting.
>>If at least any interpreter branch has a pointer to the (root)
>>object in question the ref-count is >0. ----
>>Question Besides: do concurrent INC/DEC machine OP-commands execute
>>atomically on Multi-Cores as they do in Single-Core threads?
> 
> 
> Generally speaking, no, the inc/dec instructions are not atomic.  You
> can do an atomic increment on the x86 using LOCK XCHG (or maybe LOCK
> INC is possible).  The thing is that the locking protocol that
> guarantees atomicity is very expensive, like 100x as expensive as an
> unlocked instruction on a big multiprocessor.  So yes, of course you
> could accomplish reference counting through locks around the ref
> counts, but performance suffers terribly.  The solution is to get rid
> of the ref counts and manage the entire heap using garbage collection.

Atomic increment and decrement instructions are not by themselves
sufficient to make reference counting safe.  It's what Boost::shared_ptr
uses to make itself internally thread-safe but it's not safe to copy
a shared_ptr without "owning" it. Not like Java where you can safely
copy a reference (Java pointer) no matter what.

Basically there's a race condition where an object containing the
refcount can be deleted between the time you load a pointer to
the object and the time you increment what used to be a refcount
and is possibly something else but definitely undefined.

I have an experimental refcounting implementation at
http://atomic-ptr-plus.sourceforge.net/


> 
> For stuff like dictionary access, there are protocols (again based on
> LOCK XCHG) that don't require locking for lookups.  Only updates
> require locking.  Simon Peyton-Jones has a good paper about how it's
> done in Concurrent Haskell:
> 
>   http://research.microsoft.com/~simonpj/papers/stm/stm.pdf
> 
> This is really cool stuff and has found its way into Perl 6.  I'd like
> to see Python get something like it.

That seems to be about STM (Software Transactional Memory).  What you're
describing seems to be read lock-free using what I call PDR
(PCOW (Partial Copy On Write) Deferred Reclaimation).  Examples of PDR
are RCU (used in Linux kernel),  Maged Michael's SMR hazard pointers,
and thread-safe GC (used in Java's concurrent collections java.util.concurrent).

You can also use PDR to manage safe refcounting ,e.g. RCU based refcounting, rcuref,
in the Linux kernel.

-- 
Joe Seigh

When you get lemons, you make lemonade.
When you get hardware, you make software. 


From p.lavarre at ieee.org  Thu Nov  9 20:09:04 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 17:09:04 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
Message-ID: <1163120944.551169.293230@h48g2000cwc.googlegroups.com>

Speaking as the OP, perhaps I should mention:

> > [-3:] to [1:] is a minor cosmetic improvement

To my eye, that's Not an improvement.

'\x08' '\x01\x23\x45' '\x80' '\0' is the correct pack of (0x08,
0x12345, 0x80, 0) because '\x01\x23\x45' are the significant low three
bytes of a big-endian x12345, thus [-3:].

The [1:] fact that we can keep the 3 significant bytes by tossing
exactly 1 byte away after rounding the bit length of that digital
number up to the nearest power of two which happens to be 4 = 3 + 1 is
merely incidental - not of central significance.



From 12.nitro at gmail.com  Thu Nov  9 05:38:33 2006
From: 12.nitro at gmail.com ([12]Nitro)
Date: 9 Nov 2006 02:38:33 -0800
Subject: cx_Oracle and NCLOBs
Message-ID: <1163068713.669375.308900@b28g2000cwb.googlegroups.com>

Greetings,

I'm currently working in a Python project to create a multi-platform
database replication tool, and cx_Oracle was the chosen provider to
handle the Oracle connections. So far the results have been very
interesting, but I've been experiencing some problems when inserting
CLOB objects through executemany (meaning, using a pre-prepared
statement and a dynamic list of parameters). Namely, somehow the
provider seems to be converting the data to LONG rather than to CLOB,
even though the statement explicitly calls out the TO_NCLOB function;
therefore, we get ORA-01461 errors.
Now, this may possibly not be an error, but instead a misusage (not
many examples available, anyways). Any help/suggestion you can provide?

Best regards,
Nitro



From fredrik at pythonware.com  Thu Nov 16 05:41:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:41:24 +0100
Subject: ANN: pyfaq 1.0b1 is now available
In-Reply-To: <1163630914.818184.210590@e3g2000cwe.googlegroups.com>
References: <mailman.212.1163628519.32031.python-list@python.org>
	<1163630914.818184.210590@e3g2000cwe.googlegroups.com>
Message-ID: <ejhf8k$ml2$1@sea.gmane.org>

John Machin wrote:

> P.S. Great job on the wiki, and yes a search facility a tad smarter
> than browser Ctrl-F would be a very good idea!

the "effbot.org" version of the PyFAQ is basically just an editing and 
staging area; when everyone involved gets enough spare cycles, the plan 
is (or at least was) that it's going to be republished here:

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

and thus be covered by python.org's search engine, like everything else 
on that site.

(but maybe one could use google's new community search, or whatever it's 
called, to set up a local search engine for the pyfaq/pyref/pytut zones. 
hmm. that's one more thing on my todo list...)

</F>



From tdelaney at avaya.com  Sun Nov 19 19:39:05 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 20 Nov 2006 11:39:05 +1100
Subject: syntax error in sum(). Please explicate.
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EBB7@au3010avexu1.global.avaya.com>

John Machin wrote:

> Michael Press wrote:
>> I have not written python codes nor run any. I saw this
>> code posted and decided to try it. It fails. I read the
>> tutorial and the entry for the built in function sum,
>> but still do not see the problem. The code was cut and
>> paste.
> 
> I doubt it -- "none" should be "None"

Not necessarily. He said he cut-and-pasted - I interpreted that to be
from *his* editor. But since he was getting a SyntaxError, he would not
have hit the NameError yet ...

All-in-all, this actually felt like a post from someone who *had* read:
http://www.catb.org/~esr/faqs/smart-questions.html

Tim Delaney


From hg at nospam.com  Wed Nov 22 14:21:57 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 13:21:57 -0600
Subject: utf - string translation
In-Reply-To: <mailman.606.1164223141.32031.python-list@python.org>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>	<mf19h.1992$%_2.1833@newsfe19.lga>
	<mailman.606.1164223141.32031.python-list@python.org>
Message-ID: <Fu19h.1996$%_2.357@newsfe19.lga>

Fredrik Lundh wrote:
> hg wrote:
> 
>> How would you handle the string.maketrans then ?
> 
> maketrans works on bytes, not characters.  what makes you think that you
> can use maketrans if you haven't gotten the slightest idea what's in the
> string?
> 
> if you want to get rid of accents in a Unicode string, you can do the
> approaches described here
> 
>     http://www.peterbe.com/plog/unicode-to-ascii
> 
> or here
> 
>     http://effbot.org/zone/unicode-convert.htm
> 
> which both works on any Unicode string.
> 
> </F>
> 
Thanks


From cliff at develix.com  Tue Nov  7 17:16:04 2006
From: cliff at develix.com (Cliff Wells)
Date: Tue, 07 Nov 2006 14:16:04 -0800
Subject: Pyro stability
In-Reply-To: <1162866001.849724.245510@b28g2000cwb.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
Message-ID: <1162937764.3199.25.camel@localhost.localdomain>

On Mon, 2006-11-06 at 18:20 -0800, Beliavsky wrote:
> Carl J. Van Arsdall wrote:
> 
> <snip>
> 
> > Pyro is fucking amazing and has been a great help to a couple of our projects.
> 
> You should watch your language in a forum with thousands of readers.

The LA Times had a story that claimed that 64% of U.S. citizens use the
word "fuck" and that 74% of us have heard it in public (I'll assume the
remainder are your fellow AOL users).  I expect extrapolating these
results worldwide wouldn't be far off the mark (the Brits were quite
successful at spreading this versatile word).

I think the gap between what people actually find offensive and what
people are afraid others will find offensive is pretty wide indeed.  

Regards,
Cliff




From bignose+hates-spam at benfinney.id.au  Fri Nov 10 03:29:36 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 10 Nov 2006 19:29:36 +1100
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<ej0se4$jt9$1@sea.gmane.org> <87k624j622.fsf@benfinney.id.au>
	<ej1bge$on6$1@sea.gmane.org>
Message-ID: <878xijk8lr.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Ben Finney wrote:
> > Steve Holden <steve at holdenweb.com> writes:
> >> Java is horrible, Oython is not.
> > Is that the predecessor to Python, the one that could only be
> > expressed in vowel noises?
> > 
> You're taking the oiss, right?

Oardon. I never meant to ooke fun at your tyoing imoediment.

-- 
 \      "For mad scientists who keeo brains in jars, here's a tio: why |
  `\    not add a slice of lemon to each jar, for freshness?"  -- Jack |
_o__)                                                           Handey |
Ben Finney



From ajikoe at gmail.com  Wed Nov 15 01:07:57 2006
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 14 Nov 2006 22:07:57 -0800
Subject: reading csv problem
Message-ID: <1163570877.075189.174670@m73g2000cwd.googlegroups.com>

Hello,

I use csv to take information from file.
import csv
reader = csv.reader(open('t.csv'))

for row in reader:
    print row # it is perfectly OK

---------------------------------------------------------------------
But If I use this code I have problem
import csv
reader = csv.reader(open('t.csv'))

for row in reader:
    print row # it is perfectly OK
for row in reader:
    print row # it is not printed on the monitor???

Why does only the first print row work here?

TIA,
ajikoe



From tim at tdw.net  Fri Nov 10 11:25:26 2006
From: tim at tdw.net (Tim Williams)
Date: Fri, 10 Nov 2006 16:25:26 +0000
Subject: Getting externally-facing IP address?
In-Reply-To: <G57273422.245.22988.3@mxextra>
References: <G57273422.245.22988.3@mxextra>
Message-ID: <9afea2ac0611100825o1115c188uc89ee1fbe0434717@mail.gmail.com>

On 10/11/06, Michael B. Trausch <fd0man at gmail.com> wrote:
>
>
>
> Every programming example that I have seen thus far shows simple server
> code and how to bind to a socket--however, every example binds to the
> localhost address.  What I am wondering is this:  Is there a clean way to
> get the networked IP address of the machine the code is running on?  For
> example, my laptop's IP address is 192.168.0.101, and I want to bind a
> server to that address.  Is there a clean way of doing so that will work,
> for example, when I move the code to my server (which obviously doesn't have
> the same IP address)?
>
>
Try  using 0.0.0.0  as the IP address,  or possibly giving IP address at
all.

HTH :)
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From steve at REMOVE.THIS.cybersource.com.au  Thu Nov  2 08:28:05 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 03 Nov 2006 00:28:05 +1100
Subject: __div__ not recognized automatically
References: <eicmj4$sak$1@gwdu112.gwdg.de>
Message-ID: <pan.2006.11.02.13.28.05.579187@REMOVE.THIS.cybersource.com.au>

On Thu, 02 Nov 2006 12:59:32 +0100, Anton81 wrote:

> When I execute the program it
> complains that it can't find an operator "/" for "instance" and "integer".

How about if you post the actual traceback you get, rather than
paraphrasing? That way, we don't have to guess.


-- 
Steven.



From inq1ltd at verizon.net  Fri Nov 17 14:27:09 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 17 Nov 2006 14:27:09 -0500
Subject: Press button to load data
In-Reply-To: <lYd7h.7605$l25.3001@newsread4.news.pas.earthlink.net>
References: <1163650825.563379.38550@b28g2000cwb.googlegroups.com>
	<mailman.305.1163740182.32031.python-list@python.org>
	<lYd7h.7605$l25.3001@newsread4.news.pas.earthlink.net>
Message-ID: <200611171427.09452.inq1ltd@verizon.net>

On Friday 17 November 2006 02:58, you wrote:
> On Fri, 17 Nov 2006 00:25:39 -0500,
> jim-on-linux <inq1ltd at verizon.net>
>
> declaimed the following in comp.lang.python:
> > Without being able to run the code my
> > question is where is the  id  in the lambda
> > defined?
>
> 	Please take into account that I've not
> actually used lambdas, so might have some
> mistakes in the syntax...
>
> > >     for bill in shelvename:
> > >         global funcs
> > >         bill1 = Button(None, text=
> > > shelvename[bill].name,
> > > font=('bold',10),command=(lambda x = id:
> > > fetchRecord(x)))
>
> 	"id" would be something that "identifies" the
> button... In this case, maybe you can use
> "bill":
>

Think about relating a Tkinter variable to each 
button then the button is related to a unique 
variable. ( Tkinter StingVar or IntVar or some 
others.) Then you will have to keep the variables 
in a list or dictionary for recalling. 


jim-on-linux
http://www.inqvista.com





> 	... command=(lambda x = bill: fetchRecord(x))
> ...
>
> As I understand the lambda syntax, what this
> does is create a "function" (which is the
> command that gets run when the button is
> pushed), and this function will call
> fetchRecord passing it the value that "x" had
> at the time of definition (hence the x=...)
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support
> Staff:		web-asst at bestiaria.com)
> HTTP://www.bestiaria.com/


From ironpythonster at gmail.com  Mon Nov  6 04:11:58 2006
From: ironpythonster at gmail.com (ironpythonster at gmail.com)
Date: 6 Nov 2006 01:11:58 -0800
Subject: Is there any python lib for calling CVS api?
Message-ID: <1162804318.492725.245410@f16g2000cwb.googlegroups.com>

  Hi everyone, this should be a quick question.  I'm writing some
scripts
to take some file and move them into a CVS repository, but it's pretty
slow, because it uses system calls to execute the CVS commands.

 Has anyone ever made a python to CVS interface library that I could
use?
Some one sugestion me use the cvsgui lib,but it look like that the lib
could
not use fro Python2.4.I've been trying to google around for something,
but predictably I get
a zillion sourceforge repository hits, and it isn't really helping.  So

anyway, if anyone knows of a useful module, I'd love to hear about it.
Thanks!



From xi at gamma.dn.ua  Sun Nov 19 08:58:19 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sun, 19 Nov 2006 15:58:19 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <i53421v27yla$.rrj9sefsk84d.dlg@40tude.net>
References: <mailman.430.1163877551.32031.python-list@python.org>
	<i53421v27yla$.rrj9sefsk84d.dlg@40tude.net>
Message-ID: <20061119135818.GA12399@58sirius016.dc.ukrtel.net>

On Sun, Nov 19, 2006 at 12:33:39PM +0100, Alan Franzoni wrote:
> Kirill Simonov  si ? divertito a scrivere:
> 
> > Unfortunately, most IDEs I tried failed miserably in this respect.  My
> > test was simple: I've run the code
> >     name = raw_input("What's your name? ")  # written in Russian
> >     print "Hello, %s!" % name               # in Russian as well
> > both from the shell and as a standalone script. This either caused a
> > UnicodeError or just printed invalid characters.
> 
> I highly dislike asking stupid questions, and this might be stupid
> indeed... but did you write
> 
> # -*- coding: iso-8859-5 -*-
> 
> or
> 
> # -*- coding: koi8_r -*-
> 
> (they both seem suited to the Russian language, but I don't know the
> difference)

They are different encodings for the same character set. The latter is
mostly used under Unices, and the former is not used anywhere as far as
I know. There are two more cyrillic encodings: cp866 and cp1251 - for
DOS and Windows correspondingly.
 
> as the first line in your .py file?

No, I would prefer the editor to save the .py files with non-ASCII
characters in UTF-8 encoding adding the BOM at the beginning of the
file. This will allow the interpreted to detect the file encoding
correctly and would save a teacher from explaining what an encoding is
and why it is needed.

> Personally, I use Eclipse+Pydev (a bit steep to learn at the beginning, and
> quite memory and cpu hogging since it's a java-based ide; don't use it on
> old/slow computers with less than 512MB RAM, and don't use version < 3.2
> either) and it uses that very line to recognize the actual character set
> employed. You may check with other encodings as well.

Unfortunately, the Eclipse CPU/memory requirements are extremely high
for a high school, so I haven't even tried it.


-- 
xi


From python.list at tim.thechases.com  Tue Nov 21 11:26:26 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 21 Nov 2006 10:26:26 -0600
Subject: Software Compatable with other versions?
In-Reply-To: <ejv7p3$egg$1@upsn250.cri.u-psud.fr>
References: <mailman.534.1164111713.32031.python-list@python.org>	<1164113768.450227.161750@m73g2000cwd.googlegroups.com>
	<ejv7p3$egg$1@upsn250.cri.u-psud.fr>
Message-ID: <456328B2.3080303@tim.thechases.com>

>>> I have been told that the .pyc are not compatable. Is it 
>>> possible, to convert a 2.4.x .pyc to a 2.5 .pyc?
> 
> The magic code.
> 
> Just rm -rf *.pyc from your own scripts directories, they will
> be rebuilt.

Just take care in the event that you have files that were 
distributed in bytecode format (.pyc) rather than source 
form...if you don't have any such .pyc files, then Laurent's 
solution is fast and easy.  If you do, you may have to protect 
them before trying such a stunt.

-tkc





From mike at hobbshouse.org  Thu Nov  9 11:16:53 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Thu, 09 Nov 2006 10:16:53 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <slrnel6dec.360.nick@irishsea.home.craig-wood.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
Message-ID: <45535475.9090207@hobbshouse.org>

Can anyone find a flaw with this change in syntax?

Instead of dividing a compound statement with a colon, why not divide it 
on a newline? For example, the colon could be dropped from this statement:
    if self.hungry:
        self.eat()
to
    if self.hungry
        self.eat()

Python is already sensitive to whitespace and the newline anyway, so why 
not put it to good use? For example, Python rejects this statement 
because of the newline present:
    if self.hungry or
      self.depressed:
        self.eat()
You need to use the backslash to continue the expression on the next line:
    if self.hungry or \
      self.depressed:
        self.eat()
The colon that divides the statement therefore seems redundant. The 
colon could continue to be used for single-line statements:
    if self.hungry: self.eat()

I think the colon could be omitted from every type of compound 
statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?

Thanks,
- Mike



From fredrik at pythonware.com  Sat Nov 11 02:50:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 08:50:05 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <022001c7055a$b24c7860$03000080@hendrik>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net><4rk5giFrerjfU1@mid.individual.net>	<ej2nrk$qea$2@sea.gmane.org>
	<022001c7055a$b24c7860$03000080@hendrik>
Message-ID: <ej3vbg$r81$2@sea.gmane.org>

Hendrik van Rooyen wrote:

>> blue is red or green or yellow
> 
> *grin* - this can be construed as a weakness in Python -

it's boolean logic, and it's incompatible with human use of the same 
terms in all contexts, not just Python.

</F>



From fredrik at pythonware.com  Tue Nov 28 03:20:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 09:20:15 +0100
Subject: Error when installing the Python Imaging Library
In-Reply-To: <1164700897.128779.180580@j44g2000cwa.googlegroups.com>
References: <1164700897.128779.180580@j44g2000cwa.googlegroups.com>
Message-ID: <ekgrg2$d6$1@sea.gmane.org>

Tim Adler wrote:

> I'm quite new to Python. I'm working on a webproject with Django and
> need to install the Python Imaging Library. It worked fine under Mac OS
> but when I try it on my Linux server. It gives me this error:
> 
> PasteBin Link: http://phpfi.com/179314
 >
> I don't really know what is wrong. Can somebody point me directions. I
> really need the PIL to work.

the important line is

_imagingtk.c:20:16: tk.h: No such file or directory

which indicates that you don't have complete Tcl/Tk development 
libraries on your machine (but you obviously have enough pieces of
them for PIL to think that you have them).

look for tcl-devel and tk-devel or similar packages in your Linux 
provider's package repository.

</F>



From mail at microcorp.co.za  Thu Nov 16 00:40:12 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 16 Nov 2006 07:40:12 +0200
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper><ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper><4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org>
Message-ID: <017c01c7094b$8539bfa0$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> ......  and seriously, under-
> standing the various aspects of floats and decimals is utterly trivial 
> compared to all the nearly-magical things you need to understand to be 
> able to do geographical calculations at a sub-millimeter scale.  heck, 
> even sub-kilometer stuff is pretty hard to get right ;-)

This is true - have you looked at that thing they call a geode? - horrible...

I can never understand why people grab for floats at the first opportunity.
To my simple mind, it seems better to work with a sub unit, and to stick to
integer arithmetic - if, as Steve said, there is a speed penalty for changing 
from floats to decimal. then you can make even a cripple processor look 
good by sticking to integers - unless you run out of precision...

- Hendrik



From fredrik at pythonware.com  Tue Nov 14 06:35:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:35:15 +0100
Subject: PyFAQ: anyone seen aahz' thread tutorial ?
In-Reply-To: <1163503688.391377.191690@e3g2000cwe.googlegroups.com>
References: <mailman.128.1163502991.32031.python-list@python.org>
	<1163503688.391377.191690@e3g2000cwe.googlegroups.com>
Message-ID: <ejc9lh$u7n$2@sea.gmane.org>

Paul Boddie wrote:

>> they have disappeared from the starship?  any ideas where to look for them ?
> 
> The Internet Archive (the rewind button of the Internet):
> 
> http://web.archive.org/web/20050729075144/http://starship.python.net/crew/aahz/OSCON2001/

but of course.  I didn't even bother to look there, because I was sure 
they didn't cache PDF files.  oh well, you learn something every day ;-)

thanks /F



From larry.bates at websafe.com  Mon Nov  6 13:14:29 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 06 Nov 2006 12:14:29 -0600
Subject: how do I pass values between classes?
In-Reply-To: <1162796443.570347.91760@e3g2000cwe.googlegroups.com>
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
	<454C9ECF.5020806@websafe.com>
	<1162796443.570347.91760@e3g2000cwe.googlegroups.com>
Message-ID: <rsqdnadvMbYP5tLYnZ2dnUVZ_tudnZ2d@comcast.com>

kath wrote:
> hi, Larry Bates .... thanks for the reply...
> 
>> You might consider doing it the same way wx passes things around.
>> When you instantiate the subclass pass the parent class' instance
>> as first argument to __init__ method.
> 
> Yes thats absolutely right..
> 
>> That way the subclass can
>> easily pass values back to the parent by using that pointer.
> 
> Could you please explain me this.. more clearly. I think it is much
> close to the solution.
> 
> 
> Thank you.
> regards, sudhir
> 
Just something like:

class foo:
    self.__init__(self, parent):
        self.parent=parent

class bar:
    self.__init__(self, parent):
        self.parent=parent
        self.foo=foo(self)


class myclass:
    self.__init__(self, parent):
        self.parent=parent
        self.bar=bar(self)

Now in foo I can reference things from myclass easily
self.parent.parent.  Or setattr(self.parent.parent, value).

Hope this helps.

-Larry


From fredrik at pythonware.com  Thu Nov  2 05:21:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 11:21:31 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
Message-ID: <eicgra$bom$1@sea.gmane.org>

elderic wrote:

> are there other ways than the ones below to check for <type 'function'>
> in a python script?

callable(f)

</F>



From sjmachin at lexicon.net  Wed Nov 29 18:08:05 2006
From: sjmachin at lexicon.net (John Machin)
Date: 29 Nov 2006 15:08:05 -0800
Subject: utf - string translation
In-Reply-To: <mailman.856.1164838370.32031.python-list@python.org>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>
	<mailman.832.1164798594.32031.python-list@python.org>
	<1164829990.146305.92750@l39g2000cwd.googlegroups.com>
	<mailman.850.1164831380.32031.python-list@python.org>
	<1164837136.303079.312060@j44g2000cwa.googlegroups.com>
	<mailman.856.1164838370.32031.python-list@python.org>
Message-ID: <1164841685.745779.268920@l12g2000cwl.googlegroups.com>


Fredrik Lundh wrote:
> John Machin wrote:
>
> > Another point: there are many non-latin1 characters that could be
> > mapped to ASCII. For example:
> >     u"\u0141ukasziewicz".translate(unaccented_map())
> > doesn't work unless an entry is added to the no-decomposition table:
> >     0x0141: u"L", # LATIN CAPITAL LETTER L WITH STROKE
> >
> > It looks like generating extra entries like that could be done, with
> > the aid of unicodedata.name():
> >
> > LATIN CAPITAL LETTER X WITH blahblah -> "X"
> > LATIN SMALL LETTER X WITH blahblah -> "X".lower()
> >
> > This would require a fair bit of care -- obviously there are special
> > cases like LATIN CAPITAL LETTER O WITH STROKE. Eyeballing by regional
> > experts is probably required.
>
> see the comments over at
>
>      http://effbot.org/zone/unicode-convert.htm

Don't rush me, I was getting to that next :-)

>
> for an extended table, eyeballed by a regional expert (and since he
> makes the same point about OE vs Oe as you do, I'll probably have to
> change the code ;-)
>

Slightly extended. My point is that there is a large number of LATIN
(CAPITAL|SMALL) LETTER X WITH twiddly-bits that don't have a
decomposition; the table entries could be generated automatically

As well as regional experts, Google can be handy: googling for Thord,
Thordh, Thordsson and Thordhsson and noting the number of hits for each
tends to indicate that you and I are right about the treatment of
"eth"; Marcin's "dh" might better indicate how it's pronounced, but "d"
is AFAICT the standard transcription.

Cheers,
John



From http  Fri Nov  3 16:59:39 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 13:59:39 -0800
Subject: Sorted and reversed on huge dict ?
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
Message-ID: <7xirhwi438.fsf@ruckus.brouhaha.com>

vd12005 at yahoo.fr writes:
> but maybe if keys of dicts are not duplicated in memory it can be done
> (as all dicts will have the same keys, with different (count) values)?

There will still be a pointer for each key, the strings themselves
won't be duplicated.  

> memory is 4Gb of ram, 

That sounds like enough ram to hold all your stuff easily.

> is there a good way to know how much ram is used
> directly from python  (or should i rely on 'top' and other unix
> command? 

I think try resource.getrusage()

> by now around 220mb is used for around 200.000 words handled in 15
> dicts)

That sounds very manageable given a 4gb machine.  Otherwise, since
it sounds like you're trying to scan some big text corpus and figure
out word frequencies, you could do it the old fashioned way.  Write
the words one per line into a big file, then sort the file with the
Unix sort utility (which is an external sort), then read the sorted
file (or pipe it through "uniq -c") to figure out the counts.


From mm2ps at yahoo.co.uk  Sun Nov  5 14:19:40 2006
From: mm2ps at yahoo.co.uk (dug)
Date: 5 Nov 2006 11:19:40 -0800
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
Message-ID: <1162754380.463019.295120@i42g2000cwa.googlegroups.com>


I think that Gnumeric lets you do some python stuff.

Douglas

Omar wrote:
> I'm looking for a programming language or module that sorta looks and
> feels like MS Excel (I love and think in tables), yet has the power and
> open-endedness of python or javascript.  I'm still pretty new to
> python.
>
> any ideas?  i've been having some fun with VBA in excel, but I want
> something I can save as en exe and call my own creation, y'know?



From deets at nospam.web.de  Sun Nov 26 10:07:43 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Nov 2006 16:07:43 +0100
Subject: Installation problem
In-Reply-To: <mailman.738.1164548535.32031.python-list@python.org>
References: <mailman.738.1164548535.32031.python-list@python.org>
Message-ID: <4stotvF10vmqhU1@mid.uni-berlin.de>

Tommy Grav schrieb:
> Trying to update my ActivePython installation I mistakenly downloaded
> the Intel Mac version (rather than the PPC version) and tried to install 
> it.
> The version did install but did not run of course. However, now trying
> to install the PPC version of Activepython or even the 2.5 version of
> macpython fails (actually macpython installs, but the installation program
> tells me there is an error at the end). Anyone know how to completely
> remove all previous python installations and all config files so that I can
> install it from scratch? Is there also a log of the dmg-installation so 
> that
> I can see what fails with the installation?

The custom installed pythons should live under

/Library/Frameworks/Python.framework

You should be able to move them somewhere else and try again.

However, I wouldn't touch

/System/Library/Frameworks/Python

as that is the OSX shipped one, don't tinker with it.


There actually is a program to see what gets installed by a package, 
where to, and you can even suppress certain parts. But unfortunately, I 
don't have it installed and don't remember its name.

Diez



From rtw at freenet.co.uk  Thu Nov  9 15:32:42 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Thu, 09 Nov 2006 14:32:42 -0600
Subject: UnboundLocalError
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
Message-ID: <Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>

Terry Reedy wrote in
news:mailman.1994.1163100168.11739.python-list at python.org in
comp.lang.python: 

>> def main():
>>    number = number()
> 
> Within a function, a given name can be either global or local, but not
> both.
> Here you are expecting the compiler to interpret the first occurance
> of 'number' as local and the second as global.  Humans can often
> resolve such ambiguities correctly, but not necessarily always.  So
> this is too much to ask of a program and hence it is not allowed.
> 

".. asked too much of the programme", sounds like a BOFH excuse to 
me ;-).

Seriously I'd bet (if I were a gambling man) that this is by design,
not either of "too much work for the interpreter" or "nobody's 
submitted a patch".

IOW: Why should the intepreter do more work just so the user 
can find new and interesting ways to shoot them selves in the foot.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From ardsrk at gmail.com  Sat Nov  4 05:17:59 2006
From: ardsrk at gmail.com (ArdPy)
Date: 4 Nov 2006 02:17:59 -0800
Subject: small python cgi webserver
In-Reply-To: <mailman.1760.1162630079.11739.python-list@python.org>
References: <mailman.1760.1162630079.11739.python-list@python.org>
Message-ID: <1162635479.491109.15640@h54g2000cwb.googlegroups.com>


Fabian Braennstroem wrote:
> Hi,
>
> I am looking for a small python script, which starts a small
> web server with python cgi support on a linux machine.
>
> I tried:
>
>
>   #!/usr/bin/env python
>   import sys
>   from CGIHTTPServer import CGIHTTPRequestHandler
>   import BaseHTTPServer
>
>   class MyRequestHandler(CGIHTTPRequestHandler):
>       # In diesem Verzeichnis sollten die CGI-Programme stehen:
>       cgi_directories=["/home/fab/Desktop/cgi-bin"]
>
>
>   def run():
>       # 8000=Port-Nummer
>       #   --> http://localhost:8000/
>       # Fuer http://localhost/
>       #   Port-Nummer auf 80 setzen
>       httpd=BaseHTTPServer.HTTPServer(('', 8000), MyRequestHandler)
>       httpd.serve_forever()
>
>   if __name__=="__main__":
>       print "Starting Server"
>       run()
>
> but when I want to test a small python cgi test file:
>
>
>   #!/usr/bin/python
>   # -*- coding: UTF-8 -*-
>
>   # Debugging f?r CGI-Skripte 'einschalten'
>   import cgitb; cgitb.enable()
>
>   print "Content-Type: text/html;charset=utf-8\n"
>   print "Hello World!"
>
> I just get the text and not the html output. The file's mode
> is 755.
>
> Is there anything wrong with the webserver script or do I do
> something completely wrong? Maybe, you have a different
> webserver script?
>
> Greetings!
>  Fabian

Probably the server is not executing your CGI script. If it is the
Apache web server that you are using then just ensure the following
settings in your /etc/httpd/conf/httpd.conf file is exactly like
following:

<Directory "/var/www/cgi-bin">
    AllowOverride None
    Options ExecCGI
    Order allow,deny
    Allow from all
</Directory>



From theller at ctypes.org  Sat Nov  4 12:13:22 2006
From: theller at ctypes.org (Thomas Heller)
Date: Sat, 04 Nov 2006 18:13:22 +0100
Subject: py2exe questions
In-Reply-To: <pan.2006.11.04.13.55.26.286283@gmx.net>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>	<454BB574.9030607@websafe.com>	<mailman.1742.1162594159.11739.python-list@python.org>	<eii0i8$82i$1@news.albasani.net>	<1162646535.744282.95290@m7g2000cwm.googlegroups.com>
	<pan.2006.11.04.13.55.26.286283@gmx.net>
Message-ID: <454CCA32.7060406@ctypes.org>

Marc 'BlackJack' Rintsch schrieb:
> In <1162646535.744282.95290 at m7g2000cwm.googlegroups.com>, Jerry wrote:
> 
>> Despite what everyone is saying though, I believe that any and all
>> solutions will require that the byte-code be extracted to some
>> directory before being run.
> 
> It's not Python bytecode.  The problem is native libraries which are hard
> to run from memory without a real file backing it on some platforms.  A
> pure Python program/package should be possible without temporary files.

py2exe even achives this on Windows.  See http://www.py2exe.org/old/ ,
and look at the section named "The bundle option".  py2exe is able to
load Python extensions (.pyd and .dll) from the zip-archive *without*
extracting them to the file system at all.  It doesn't work for the C
runtime library msvcr71.dll though.

Thomas



From gagsl-py at yahoo.com.ar  Tue Nov  7 15:43:13 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 17:43:13 -0300
Subject: C wrapper
In-Reply-To: <1162931220.448328.108160@e3g2000cwe.googlegroups.com>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
	<mailman.1848.1162930804.11739.python-list@python.org>
	<1162931220.448328.108160@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107173909.05568188@yahoo.com.ar>

At Tuesday 7/11/2006 17:27, Sheldon wrote:

>Here is the file/module name: _msgpps_functions.c
>Here is the initfunction:
>
>PyMODINIT_FUNC init_msgpps_functions(void) {
>   PyObject* m;
>   m=Py_InitModule("_msgpps_functions",_msgpps_functionsMethods);
>   ErrorObject = PyString_FromString("_msgpps_functions.error");
>   if(ErrorObject == NULL ||                                             \
>      PyDict_SetItemString(PyModule_GetDict(m),"error",ErrorObject)!=0)
>{
>     Py_FatalError("Can't define _msgpps_functions.error");
>     import_array();
>   }     /*  access to Numeric PyArray functions */
>}
>
>
>I have not main() function in the file. Instead the main function is
>called the same name:
>
>static PyObject* _msgpps_functions(PyObject* self, PyObject* args)
>
>Now I am new at this and I have been reading anything I can find. The
>only thing that is out of place is the part which I didn't include:
>
>     /* Initialize the Python interpreter.  Required. */
>     Py_Initialize();
>
>     /* Add a static module */
>     initspam();
>because I still don't understand this part.

Are you *extending* Python with a new module written in C (you should 
be using the first part),
or *embedding* python inside your application, mainly written in C 
(you would use something like the last code).


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From gagsl-py at yahoo.com.ar  Thu Nov  9 18:39:08 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 20:39:08 -0300
Subject: urlretrieve get file name
In-Reply-To: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109202123.03d18800@yahoo.com.ar>

At Thursday 9/11/2006 19:11, Sven wrote:

>I'm wrestling with the urlretrieve function in the urllib module. I
>want to download a file from a web server and save it locally with the
>same name. The problem is the URL - it's on the form
>http://www.page.com/?download=12345. It doesn't reveal the file name.
>Some hints to point me in the right direction are greatly appreciated.

The file name *may* come in the Content-Disposition header (ex: 
Content-Disposition: attachment; filename="budget.xls")
Use urlopen to obtain a file-like object; its info() method gives you 
those headers.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From mauriceling at acm.org  Thu Nov 16 16:28:57 2006
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 16 Nov 2006 21:28:57 GMT
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163711259.597170.116020@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
	<455cc9ae$1@news.unimelb.edu.au>
	<1163711259.597170.116020@e3g2000cwe.googlegroups.com>
Message-ID: <455cd815$1@news.unimelb.edu.au>

Stephen Eilert wrote:

> Maurice LING escreveu:
> 
> 
>>>I once wrote a partial JVM in Modula-3 (strictly a researchware
>>>effort), so I can imagine it being done technically.  But why?
>>>
>>>The big problem with Java-and-Python is not the VMs underneath.  It is
>>>the fact that Java has layers upon layers upon layers of idiosyncratic
>>>libraries and idioms.  When you write bindings to that world (even if
>>>the bindings are generated automagically), you have to *think* in
>>>those same layers.  The Python-oriented developer suddenly has to use
>>>a dozen imports in order to do things already done better in
>>>Pythonesque libraries.
>>>
>>
>>The main use I can see is to be able to incorporate Java applications
>>into Python. For example, I am using Cytoscape (www.cytoscape.org) which
>>is in Java. I do hope that I can control Cytoscape from Python and
>>manipulate its objects from Python.
>>
>>Say given cytoscape.jar, I'll like to be able to do this:
>>
>> >>> from cytoscape javaimport cytoscape
>> >>> c = cytoscape()
>>
>>And the tighest way I see that this can be done is for Python VM to
>>execute Java bytecodes like Python bytecodes. That is, Python VM
>>executes Java bytecodes directly and not through object mapping which I
>>think is that JPyPe is doing.
>>
>>I must say that this is part of even a fluffier dream that one day, I
>>can take any applications and play around with it in Python. Currently,
>>my collaborators wrote in Perl and Java, so it is not easy for me to use
>>their work in my work.
>>
>>ML
> 
> 
> What is wrong with the other way around and Jython?
> 
Nothing wrong with the other way round - JVM executing *Python bytecodes*.

Cytoscape has a plugin with enables one to bring up Jython interpreter 
but it is way too slow - make sure you start to load it up before lunch 
if you want to execute a few lines of codes after lunch.

ML


From attn.steven.kuo at gmail.com  Thu Nov  9 15:27:10 2006
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 9 Nov 2006 12:27:10 -0800
Subject: Lists of lists and tuples, and finding things within them
References: <1163079978.5053.32.camel@pepper>
	<mailman.1986.1163095615.11739.python-list@python.org>
Message-ID: <1163104030.342251.108060@f16g2000cwb.googlegroups.com>

Daniel Nogradi wrote:
> > I have a program that keeps some of its data in a list of tuples.
> > Sometimes, I want to be able to find that data out of the list.  Here is
> > the list in question:
> >
> > [('password01', 'unk'), ('host', 'dragonstone.org'), ('port', '1234'),
> > ('character01', 'Thessalus')]
> >
> > For a regular list, I could do something like x.index('host') and find
> > the index of it, but I don't know how to do this for a tuple where the
> > data item isn't known in advance.  For example, I want to get the "host"
> > entry from the list above; but I can only retrieve it if I know what it
> > contains (e.g., x.index(('host', 'dragonstone.org'))).
> >
> > Is there a better way to do this than a construct similar the following?
> >
> > for key, value in x:
> >     if key == 'host':
> >         print value
> >
>
> If I were you I would use a dictionary for such a thing:
>

(snipped)


The sequence of tuples may have repeated "keys"; if
that's the case, then you may use a filter/iterator instead.
Using a dictionary would otherwise cause you to lose
"values":

import itertools

mytuple = (('foo', 'bar'), ('foo', 'foobar'), ('baz', 'qux'))

it = itertools.ifilter(lambda t : t[0] == 'foo', mytuple)
 
for t in it:
    print t


-- 
Hope this helps,
Steven



From chris at kateandchris.net  Wed Nov  8 10:25:40 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Wed, 8 Nov 2006 10:25:40 -0500
Subject: Help with installing soappy module on Python 2.4.3 (windows
	machine)
In-Reply-To: <1162913449.381411.261040@k70g2000cwa.googlegroups.com>
References: <1162913449.381411.261040@k70g2000cwa.googlegroups.com>
Message-ID: <20061108152539.GA32043@kateandchris.net>

On Tue, Nov 07, 2006 at 07:30:49AM -0800, ajkadri at googlemail.com wrote:
> Hi Folks,
> 
> 
> I want to install the SOAPpy module on my windows box. I have python
> 2.4.3
> 
> Can you help me with the steps and the URL from where can I get the
> download..??

http://pywebsvcs.sourceforge.net/

> 
> TIA.
> 
> Regards,
> Asrarahmed
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From fredrik at pythonware.com  Sat Nov 11 19:23:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 01:23:59 +0100
Subject: py2exe console removing
In-Reply-To: <1163270591.454295.315750@f16g2000cwb.googlegroups.com>
References: <1163270591.454295.315750@f16g2000cwb.googlegroups.com>
Message-ID: <ej5pit$oe9$1@sea.gmane.org>

Croteam wrote:

> Can somebody tell me how to I remove console at script installing?

what does "installing" mean in this context?  if the problem is that you 
get a console window when you run the program without a console (e.g. if 
you start it from the explorer), use "windows=" instead of "console=" in 
your setup.py script.

</F>



From wiggly at wiggly.org  Tue Nov 14 10:13:49 2006
From: wiggly at wiggly.org (Nigel Rantor)
Date: Tue, 14 Nov 2006 15:13:49 +0000
Subject: modules and generated code
In-Reply-To: <ejckue$ns2$01$1@news.t-online.com>
References: <mailman.146.1163514956.32031.python-list@python.org>
	<ejckue$ns2$01$1@news.t-online.com>
Message-ID: <4559DD2D.6040509@wiggly.org>

Peter Otten wrote:
> Nigel Rantor wrote:
> 
>> So, if I have a tool that generates python code for me (in my case,
>> CORBA stubs/skels) in a particular package is there a way of placing my
>> own code under the same package hierarchy without all the code living in
>> the same directory structure.
> 
> http://docs.python.org/lib/module-pkgutil.html

Ooh, thanks for that.

Yep, looks like that should work, but it doesn't. :-/

Do you have any idea whether other __init__.py scripts from the same 
logical module will still be run in this case?

The generated code uses its init script to pull in other code.

Off, to tinker some more with this.

   n




From mensanator at aol.com  Thu Nov 23 01:37:59 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 22 Nov 2006 22:37:59 -0800
Subject: Abelson and Python
In-Reply-To: <1164258788.650158.118150@h54g2000cwb.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164258788.650158.118150@h54g2000cwb.googlegroups.com>
Message-ID: <1164263879.301641.246820@e3g2000cwe.googlegroups.com>


Paddy wrote:
> bearophileHUGS at lycos.com wrote:
>
> > While studying the SICP video lectures I have to twist my mind some to
> > completely understand the lessons. I implement the programs shown there
> > in both Python and Scheme, and I find the Python implementations
> > simpler to write (but it's not a fair comparison because I know very
> > little Scheme still).
> >
> > Now some things are changing:
> > http://lambda-the-ultimate.org/node/1840
> >
> > >The MIT is going to change its curriculum structure that was famous for teaching Scheme in introductory courses. One force behind the reform is no one else than Harold Abelson, famous for his marvelous Scheme opus SICP.<
> > >The first four weeks of C1 will be a lot like the first four weeks of 6.001, Abelson said. The difference is that programming will be done in Python and not Scheme.<
> >
> >
> > Someone is translating the SIPC programs in Python too:
> > http://www.codepoetics.com/wiki/index.php?title=Topics:SICP_in_other_languages#Python
> >
> > With slides and code from lectures:
> > http://courses.csail.mit.edu/6.01/
> > http://courses.csail.mit.edu/6.01/fall06/calendar.html
> >
> > I like Scheme a bit too, but I consider this is a small victory for
> > Python :-)
> >
> > Bye,
> > bearophile
>
> Hi Bearophile.
> (Is your name pronounced Beer-owe-file, or Bear-oh-fi-lee, just
> wondered :-) ?
>
> I too have heard about the MIT course changing to Python elsewhere and
> wanted to know why it was talked about so much?

Scheme was invented at MIT. If Scheme is as fabulous as its adherents
claim, why would the institution that invented it drop it?

To me, the answer is obvious, but probably not to the press.

> I'm from England, I
> know that MIT is a very prestigious university, but if Cambridge
> changed a course, or better still, The Open University changed a
> similar course to Python, I think I'd be hard pressed to hear about it.
> Is the MIT course syndicated to Universities around America or
> something?
> 
> Cheers,  Paddy.



From mc_anjo at tamu.edu  Fri Nov  3 19:04:05 2006
From: mc_anjo at tamu.edu (Chris Smith)
Date: Fri, 03 Nov 2006 18:04:05 -0600
Subject: numpy help
In-Reply-To: <eiggdj$4fg$1@news.albasani.net>
References: <mailman.1741.1162592618.11739.python-list@python.org>
	<eiggdj$4fg$1@news.albasani.net>
Message-ID: <eigldo$66j$1@sea.gmane.org>

robert wrote:
> Chris Smith wrote:
> 
>>Howdy,
>>
>>I'm a college student and for one of we are writing programs to
>>numerically compute the parameters of antenna arrays. I decided to use
>>Python to code up my programs. Up to now I haven't had a problem,
>>however we have a problem set where we are creating a large matrix and
>>finding it's inverse to solve the problem. To invert the matrix I've
>>tried using numpy.numarray.linear_algebra.inverse and
>>numpy.oldnumeric.linear_algebra.inverse which both give me the same
>>error ( I was hoping they called different routines but I think they
>>call the same one ).
>>
> 
> 
> try scipy.linalg.inv etc. 
> 
> (you are using outdated old NumPy modules with recent array type which sometimes creates type conflicts. 
> 
> robert
> 

I tried that one also, and it didn't work.

Chris



From steve at REMOVEME.cybersource.com.au  Tue Nov 21 23:33:02 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 22 Nov 2006 15:33:02 +1100
Subject: Is there a list comprehension for this?
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>

On Tue, 21 Nov 2006 13:19:04 -0800, liam_herron wrote:

> 
> Given:
> dw = [ 1, -1.1, +1.2 ]
> 
> Suppose I want to create a list 'w' that is defined as
> 
> w[0] = dw[0],
> w[1] = w[0] + dw[1],
> w[2] = w[1] + dw[2]
> 
> Is there a list comprehension or map expression to do it in one or 2
> lines.

This isn't a list comp and it doesn't need map, but if you
absolutely have to have a one-liner:

w = [dw[0], dw[0] + dw[1], dw[0] + dw[1] + dw[2]]

Obviously that doesn't scale at all to larger lists, but it gives you a
better idea: replace the manual additions with sum().

w = [sum(dw[0:i]) for i in range(1, len(dw))]

but if your dw list is huge, you're spending a lot of time slicing
dw and adding up the same numbers over and over again. (This doesn't
matter if dw is small, but could become expensive if dw is huge.)

Which leads to the next version:

def running_sum(dw):
    """Return a list of the running sums of sequence dw"""
    rs = [0]*len(dw)
    for i in range(len(dw)):
        rs[i] = dw[i] + rs[i-1]
    return rs

It isn't a one-liner, but it is clear, the name is self-documenting, it
has a doc-string, you don't have to copy-and-paste code every time you
want to use it, and now that you've defined it once, you can use it as a
one-liner as many times as you like.

>>> running_sum(range(5)):
[0, 1, 3, 6, 10]



-- 
Steven D'Aprano 



From sjmachin at lexicon.net  Mon Nov  6 19:46:46 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 16:46:46 -0800
Subject: auto indent
References: <mailman.1816.1162844560.11739.python-list@python.org>
Message-ID: <1162860406.301935.127110@m7g2000cwm.googlegroups.com>

M.N.Smadi wrote:
> Hi there;
>
> i have a script that is not indented properly. Is there a way that i can
> have it auto indented.

It depends on what you mean by "not indented properly". Indentation is
part of the Python grammar.

If the script compiles OK, and works as expected, but you have (say)
4-space indent in parts, and 3-space in other parts, or a mixture of
tabs and spaces, you could use the supplied reindent script. It's
C:\Python25\Tools\Scripts\reindent.py on my machine. Do read the
documentation at the start of the script before you run it.

If you mean that the indentation is just plain wrong, such that the
script will not compile without error, or incorrect indentation of one
or more lines is causing incorrect results, then you will have to fix
it manually. There is no "artificial intelligence" that can work out
what the indentation should be.

HTH,
John



From steve at holdenweb.com  Mon Nov 13 03:25:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 02:25:04 -0600
Subject: MemoryError
In-Reply-To: <5a00f6240611121010i63c16d95tf9fc743edcb58ebf@mail.gmail.com>
References: <5a00f6240611121010i63c16d95tf9fc743edcb58ebf@mail.gmail.com>
Message-ID: <ej9a2m$vae$1@sea.gmane.org>

Bugra Cakir wrote:
> Hi,
> 
> Within a Python program how can we avoid getting "MemoryError" problem ?
> 
Well that depends why you are getting it in the first place.

If you can post the traceback your program prints out then you might get 
some specific advice for the current case. The usual advice might be 
"don't use too much memory", but that alone probably won't be helpful.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jack at abc.net  Sat Nov 18 17:23:42 2006
From: jack at abc.net (Michael Press)
Date: Sat, 18 Nov 2006 22:23:42 GMT
Subject: syntax error in sum(). Please explicate.
Message-ID: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>

I have not written python codes nor run any. I saw this
code posted and decided to try it. It fails. I read the
tutorial and the entry for the built in function sum,
but still do not see the problem. The code was cut and
paste. Please help. Thanks.

_________________________BEGIN_CODE_________________________
#!/usr/bin/python

ps = [none, 2,3,5,7,11,13,17,19,23,29]

def phi(x, a):
    return x - sum(phi(x // ps[i+1], i) for i in range(a))

def pi(n):
    from math import sqrt
    if n <= 1:
        return 0
    a = pi(int(sqrt(n)))
    return phi(n, a) + a - 1
__________________________END_CODE__________________________

Here is the result of running it:

  File "/Users/mdp/source/prime_counter_python", line 6
    return x - sum(phi(x // ps[i+1], i) for i in range(a))
                                          ^
SyntaxError: invalid syntax

Here are some lines from python -v:

Python 2.3 (#1, Sep 13 2003, 00:49:11) 
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information

-- 
Michael Press


From jimvtess at gmail.com  Sat Nov  4 12:18:11 2006
From: jimvtess at gmail.com (Jim)
Date: 4 Nov 2006 09:18:11 -0800
Subject: win32file.DeviceIoControl(FSCTL_GET_RETRIEVAL_POINTERS)
Message-ID: <1162660691.829676.85990@h48g2000cwc.googlegroups.com>

I'm not sure how to perform this operation in Python. The difficulty is
in knowing the size of the output buffer: if it is too small, I get an
"insufficient buffer" exception; too large, and I get an "end of file"
exception. In neither case is any partial data available.

I'd rather not resort to a binary seach...



From gregpinero at gmail.com  Wed Nov  8 14:56:14 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 8 Nov 2006 14:56:14 -0500
Subject: PIL - Pixel Level Image Manipulation?
In-Reply-To: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>
References: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>
Message-ID: <312cfe2b0611081156v619bd82eu782b068bfd2cf558@mail.gmail.com>

On 11/8/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> I want to be able to randomly change pixels in an image and view the
> results.  I can use whatever format of image makes this easiest, e.g.,
> gray scale, bit tonal, etc.
>
> Ideally I'd like to keep the pixels in an intermediate format like a
> list of (integers?) or an array and convert that to an image as
> needed.
>
> I'm hoping someone has some experience on this and could offer some
> advice or code.  I thought it would be easy in PIL  but I'm not sure.

I did find these functions after more searching:
http://mail.python.org/pipermail/image-sig/2002-July/001914.html

Perhaps I'll try those out tonight if I don't hear of anything better
in the meantime.

-Greg


From tleeuwenburg at gmail.com  Wed Nov  1 23:43:31 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 1 Nov 2006 20:43:31 -0800
Subject: The Python Journal
Message-ID: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>

To whom it may concern,

I have been involved in putting together a new Python journal, called
(oh so originally) The Python Journal. This isn't related to a previous
project also called The Python Journal although we have the approval of
the group that put it together in using their name.

http://pyjournal.cgpublisher.com is the journal URL, and it has a
number
of news feeds -- blog entries, new products (i.e. articles and volumes)
and product reviews (not used currently).

We'd love it if you could have a look at our first issue, and let us
know what you think!

Cheers,
-T (editor-in-chief)



From walterbyrd at iname.com  Thu Nov  2 10:08:31 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 2 Nov 2006 07:08:31 -0800
Subject: is mod_python borked?
Message-ID: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>

I am considering python, instead of php, for web-application
development. I often see mod_python.criticisized as being borked,
broken, or just plain sucking.

Any truth to any of that?



From mike at hobbshouse.org  Fri Nov 10 16:18:55 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Fri, 10 Nov 2006 15:18:55 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej2pa2$vpq$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>
	<ej2pa2$vpq$1@sea.gmane.org>
Message-ID: <4554ECBF.7040603@hobbshouse.org>

Ron Adam wrote:
> It is also an outline form that frequently used in written languages.  Something 
> python tries to do, is to be readable as if it were written in plain language 
> where it is practical to do so.  So the colon/outline form makes a certain sense 
> in that case as well.
>   
That is perhaps the most convincing argument that I've heard so far. 
Indeed, I often find myself writing out colons when writing pseudo-code 
out on paper. The reason, however, is usually because my indents don't 
quite line up as perfectly on paper as they do in an editor. The colons 
provide a form of backup separation for when my columns start to get 
sloppy. (Natural language is actually filled with such redundancies in 
order to compensate for sloppy handwriting.) This backup function 
obviously isn't needed when a computer is taking care of the layout.

My final argument against the colons is to simply try programming in 
Ruby for a while and then come back to Python. I think you'll find that 
programming without the colons just simply feels more "natural".

- Mike




From email at christoph-haas.de  Thu Nov 23 09:20:44 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Thu, 23 Nov 2006 15:20:44 +0100
Subject: Email headers and non-ASCII characters
In-Reply-To: <200611231512.33779.email@christoph-haas.de>
References: <200611231512.33779.email@christoph-haas.de>
Message-ID: <200611231520.44611.email@christoph-haas.de>

On Thursday 23 November 2006 15:12, I wrote:
> My example code:
>
> =================================
> def sendmail(sender, recipient, body, subject):
>    message = MIMEText(body)
>    message['Subject'] = Header(subject, 'iso-8859-1')
>    message['From'] = Header(sender, 'iso-8859-1')
>    message['To'] = Header(recipient, 'iso-8859-1')
>
>    s = smtplib.SMTP()
>    s.connect()
>    s.sendmail(sender, recipient, message.as_string())
>    s.close()
> =================================

Just for completeness - of course I imported the Header methods from here:

from email.MIMEText import MIMEText
from email.Header import Header

 Christoph


From ptmcg at austin.rr._bogus_.com  Mon Nov 27 13:41:23 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 27 Nov 2006 18:41:23 GMT
Subject: can't get cgi values
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
Message-ID: <njGah.4178$_H5.2036@tornado.texas.rr.com>

form("citation").value

Is form some form of dict?  If so, then this should be something like:

form["citation"]

If not, then maybe value is a function, requiring ()'s to actually invoke 
it.

-- Paul 




From jorge.vargas at gmail.com  Wed Nov  8 00:51:03 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Wed, 8 Nov 2006 01:51:03 -0400
Subject: Python memory usage
In-Reply-To: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
Message-ID: <32822fe60611072151s6b1bf5f1u42a77e938f97462d@mail.gmail.com>

On 7 Nov 2006 21:42:31 -0800, placid <Bulkan at gmail.com> wrote:
> Hi All,
>
> Just wondering when i run the following code;
>
> for i in range(1000000):
>      print i
>
the problem of that is that all the memory is used by the list
returned by range which wont be freed until the for loop exits

try this

>>> import itertools
>>> for i in itertools.count(1000000):
...     print i

that uses an iterator which I believe will bring down the memory usage
but will kill your CPU :)

> the memory usage of Python spikes and when the range(..) block finishes
> execution the memory usage does not drop down. Is there a way of
> freeing this memory that range(..) allocated?
>
> I found this document but the fix seems too complicated.
>
> http://www.python.org/pycon/2005/papers/79/python-memory.pdf
>
> Cheers
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Sebastien.Boisgerault at gmail.com  Fri Nov 17 14:38:02 2006
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 17 Nov 2006 11:38:02 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163713573.147702.229320@k70g2000cwa.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163713573.147702.229320@k70g2000cwa.googlegroups.com>
Message-ID: <1163792282.802768.216630@m73g2000cwd.googlegroups.com>



On Nov 16, 10:46 pm, "John Henry" <john106he... at hotmail.com> wrote:
> Bill Gates will have you jailed! :-)
>
> On a more serious note, is there any alternative to Simulink though?

Ptolemy II. Java stuff in the core but components may be written in
Python

http://ptolemy.eecs.berkeley.edu/ptolemyII/
http://ptolemy.eecs.berkeley.edu/ptolemyii/ptII5.0/ptII/doc/codeDoc/ptolemy/actor/lib/python/PythonScript.htm

> sturlamolden wrote:
> >and is infinitely
> > more expensive.
>
> > Does anyone wonder why I am not paying for Matlab maintenance anymore?
>
> > Sorry Mathworks, I have used your product for years, but you cannot
> > compete with NumPy.
> 
> > Cheers,
> > Sturla Molden



From samantha7395 at hotmail.com  Thu Nov 16 19:39:48 2006
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 16 Nov 2006 16:39:48 -0800
Subject: Writing to Registry
References: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
	<mailman.295.1163723213.32031.python-list@python.org>
Message-ID: <kKKdnZ2xUaRSmcDYnZ2dnUVZ_oOdnZ2d@adelphia.com>

Thanks for the link.
S
"Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote in message 
news:mailman.295.1163723213.32031.python-list at python.org...
> At Thursday 16/11/2006 20:48, Samantha wrote:
>
>>I am working with this recipes:
>>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66011
>>
>>The problem I am having is setting a hex value.
>>This line ---   SetValueEx(aKey,"MyNewKey",0, REG_SZ,
>>r"c:\winnt\explorer.exe")
>>I want something Like --   SetValueEx(aKey,"MyNewSize",0, REG_SZ, 120 or
>>some value)
>
> Usually when you don't know how to use a certain function, you begin by 
> reading the documentation for it:
> http://docs.python.org/lib/module--winreg.html#l2h-5827
>
>
> -- 
> Gabriel Genellina
> Softlab SRL
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis! ?Abr? tu 
> cuenta ya! - http://correo.yahoo.com.ar 




From bearophileHUGS at lycos.com  Thu Nov 23 14:56:46 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 23 Nov 2006 11:56:46 -0800
Subject: python gaining popularity according to a study
In-Reply-To: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
Message-ID: <1164311806.482272.303410@e3g2000cwe.googlegroups.com>

ccdetail at gmail.com:
> Python is the 7th most commonly used language, up from 8th.
> The only one gaining ground besides VB in the top 10.

It also shows that Ruby is gaining even more, and D is (gladly) growing
too.

Bye,
bearophile



From fredrik at pythonware.com  Tue Nov 28 06:30:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 12:30:07 +0100
Subject: "fork and exit" needed?
In-Reply-To: <slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
Message-ID: <ekh6k0$3um$1@sea.gmane.org>

Nick Craig-Wood wrote:

> If you run this
> 
>   import os,sys,time
>   print os.getpid()
>   sys.stdout = open(os.devnull, 'w')
>   time.sleep(60)
> 
> It prints its pid.

and not only that, if you run

	print "world",
	print "hello"

it prints "hello world" in the wrong order!

</F>



From Anthon.van.der.Neut at googlemail.com  Tue Nov 14 07:31:52 2006
From: Anthon.van.der.Neut at googlemail.com (Anthon)
Date: 14 Nov 2006 04:31:52 -0800
Subject: Python 2.5 Core Dump on Solaris 8
In-Reply-To: <1163506137.477368.111160@h48g2000cwc.googlegroups.com>
References: <mailman.2071.1163195374.11739.python-list@python.org>
	<1163506137.477368.111160@h48g2000cwc.googlegroups.com>
Message-ID: <1163507512.678945.246560@m7g2000cwm.googlegroups.com>

You can set an environment variable MALLOC_CHECK_ to influence the
behaviour of glibc
0 -> no error message program continues
1 -> error message, program continues
2 -> no error message, kills program
3 -> error message, kills program

Since the message only occured with my two programs at exit time, I set
the environment var to 0

HTH
Anthon



From gregpinero at gmail.com  Wed Nov  8 11:53:22 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 8 Nov 2006 11:53:22 -0500
Subject: PIL - Pixel Level Image Manipulation?
Message-ID: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>

I want to be able to randomly change pixels in an image and view the
results.  I can use whatever format of image makes this easiest, e.g.,
gray scale, bit tonal, etc.

Ideally I'd like to keep the pixels in an intermediate format like a
list of (integers?) or an array and convert that to an image as
needed.

I'm hoping someone has some experience on this and could offer some
advice or code.  I thought it would be easy in PIL  but I'm not sure.

Much Appreciated,

-- 
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From tim.peters at gmail.com  Fri Nov 17 19:50:43 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 17 Nov 2006 19:50:43 -0500
Subject: Decimal() instead of float?
In-Reply-To: <ejlgb0$33s$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper> <4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org> <1163794251.5107.151.camel@pepper>
	<ejl5s5$334$1@sea.gmane.org> <1163800304.5107.179.camel@pepper>
	<ejlgb0$33s$1@sea.gmane.org>
Message-ID: <1f7befae0611171650h2ae00970g2f5a5d10ea2b73c3@mail.gmail.com>

[Michael B. Trausch]
>> Let's say that I want to work with the latitude 33.6907570.  In Python,
>> that number > can not be stored exactly without the aid of
>> decimal.Decimal().
>>
>> >>> 33.6907570
>> 33.690756999999998
>> >>>
>>
>> As you can see, it loses accuracy after the 6th decimal place.

[Terry Reedy]
> No, it loses accuracy in the 15th decimal place, which is the 17th digit.
> This is far more accurate than any measured latitude could be.
> If the above is a measurement, it represents anything from 33.69075695
> to 33.69075705.  The conversion error would have to be multiplied by some
> number of millions before it would be visible in the 7th decimal place
> (your last).
>
> Any trigonometric calculations will use an *approximate* value of pi and
> polynomial *approximations* of the theoretical functions.

The trend in "modern" math libraries is actually that sin(), cos() and
tan() return a result strictly less than 1 ULP off from the true
mathematical result (including "acting as if" they used an infinitely
precise value for pi).  It remains unclear what actual benefit there
is in, e.g., treating a sloppy argument like 2.31e273 "as if" it were
infinitely precise and reducing it by an infinitely precise value of
pi, /except/ that it allows making precise statements about the
accuracy of functions doing so.  In effect, this way all the blame
gets pinned on the user if they don't like the results ;-)

> Perhaps you have been given impossible conditions to fulfill.

I'm sure it's inconceivable to any programmer that management would
have an unreasonable expectation.


From gagsl-py at yahoo.com.ar  Thu Nov  9 21:01:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 23:01:25 -0300
Subject: pack a three byte int
In-Reply-To: <1163121855.884088.12970@h48g2000cwc.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<1163121855.884088.12970@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109225427.0595fe40@yahoo.com.ar>

At Thursday 9/11/2006 22:24, p.lavarre at ieee.org wrote:

>Perhaps Python can't concisely say three-byte int ...
>
>But Python can say six-nybble hex:
>
> >>> import binascii
> >>> cdb = binascii.unhexlify('%02X%06X%02X%02X' % (0x08, 0x12345, 0x80, 0))
> >>> binascii.hexlify(cdb)
>'080123458000'

The only problem I can see is that this code is endianness-dependent; 
the suggested versions using pack(">...") not. But this may not be of 
concern to you.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From rtw at freenet.co.uk  Fri Nov  3 11:52:32 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Fri, 03 Nov 2006 10:52:32 -0600
Subject: Tools for Java/Python scripting
References: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>
	<mailman.1722.1162571941.11739.python-list@python.org>
Message-ID: <Xns9870AB71855B6rtwfreenetREMOVEcouk@216.196.109.145>

 wrote in news:mailman.1722.1162571941.11739.python-list at python.org in 
comp.lang.python:

> 
>     steve> http://wiki.python.org/moin/Java_Scripting
> 
> Renamed to "JavaScripting".
> 
> Skip

So nobody around here has heared of that other language 
called JavaScript then ?

Perhaps "Scripting_Java" might be better.

Pythoning-ly yr's Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From stanc at al.com.au  Thu Nov 16 23:48:24 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Nov 2006 15:48:24 +1100
Subject: popen(1-4) as a seperate process
Message-ID: <455D3F18.40902@al.com.au>

Hi,
Im trying to popen (or more specifically os.popen4() ) from wxPython. 
I've read the documentation on popen and it says I can do a popen as a 
seperate process or popen not as a child process but it doesnt say how.
Can anyone help?
Thanks


From aspmanualator_1234567890 at yahoo.com  Mon Nov 27 02:07:34 2006
From: aspmanualator_1234567890 at yahoo.com (Asper Faner)
Date: 26 Nov 2006 23:07:34 -0800
Subject: I am looking xml-python processor
Message-ID: <1164611254.056063.23110@l39g2000cwd.googlegroups.com>

Is there any newer version of topic map processor I can use ? Thanks



From bignose+hates-spam at benfinney.id.au  Wed Nov  8 20:17:15 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Nov 2006 12:17:15 +1100
Subject: python Error: IndentationError: expected an indented block
References: <20061108142618.77660.qmail@web58114.mail.re3.yahoo.com>
Message-ID: <87bqnhmnac.fsf@benfinney.id.au>

Please don't post HTML message bodies to a public forum.

Antonios Katsikadamos <antonioskatsikadamos at yahoo.com> writes:

> hi all. I am using python 2.4. I have to run an older python code
> and when i run it i get the following message
> IndentationError: expected an indented block.
> 1)what does this mean?

It's self-explanatory. There's an error in the indentation; Python was
expecting an indented block, but didn't get one.

> 2)how can i overcome this problem

Fix the indentation. As you probably know, in Python, indentation is
syntactically significant information to both the programmer and to
the interpreter. If that information is lost, Python can't know what
was meant, and refuses to guess.

Probably something has mangled the white-space in the program
file. Either fix it manually, or go back to a more canonical form of
the file and see if it's been altered.

-- 
 \      "I have a large seashell collection, which I keep scattered on |
  `\        the beaches all over the world. Maybe you've seen it."  -- |
_o__)                                                    Steven Wright |
Ben Finney



From rpdooling at gmail.com  Wed Nov  8 10:49:44 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 8 Nov 2006 07:49:44 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <4551FA0F.4000202@hotmail.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>
Message-ID: <1163000984.575289.87230@i42g2000cwa.googlegroups.com>

Chaz Ginger wrote:

>> it is supposed to be about PYTHON. Get it?

I agree. And Python is an extremely serious matter calling for decorum
and propriety.

Don't say fuck, ni, peng, or ni-wom.

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

rd



From ptmcg at austin.rr._bogus_.com  Sun Nov 26 12:59:39 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 26 Nov 2006 17:59:39 GMT
Subject: RuPy Ruby & Python Conference 2007
References: <1164558164.421675.302290@14g2000cws.googlegroups.com>
Message-ID: <fCkah.3282$_H5.1682@tornado.texas.rr.com>

"Katarzyna Bylec" <katarzyna.bylec at gmail.com> wrote in message 
news:1164558164.421675.302290 at 14g2000cws.googlegroups.com...
> Hello,
>
> we would like to invite you to one of the biggest Ruby and Python
> events in
> central-eastern Europe next year. RuPy Conference dedicated to Ruby and
> Python programming languages will take place in April 14-15, 2007 in
> Poznan,
> Poland and the idea behind it is to put together experts with young
> programmers and to support a good communication channel for East-West
> exchange of prospective ideas.
>
Isn't this the week after the:
Oil and Water Conference
Gasoline and Dynamite Conference
Hatfield and McCoy Symposium

-- Paul




From olakh at walla.co.il  Sat Nov 25 16:39:55 2006
From: olakh at walla.co.il (Ola K)
Date: 25 Nov 2006 13:39:55 -0800
Subject: a -very- case sensitive search
Message-ID: <1164490795.866046.133230@45g2000cws.googlegroups.com>

Hi,
I am pretty new to Python and I want to make a script that will search
for the following options:
1) words made of uppercase characters -only- (like "YES")
2) words made of lowercase character -only- (like "yes")
3) and words with only the first letter capitalized (like "Yes")
* and I need to do all these considering the fact that not all letters
are indeed English letters.

I went through different documention section but couldn't find a right
condition, function or method for it.
Suggestions will be very much appriciated...
--Ola



From fredrik at pythonware.com  Mon Nov 13 05:03:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 11:03:09 +0100
Subject: Data structure for ordered sequence
In-Reply-To: <1163411468.025376.171210@k70g2000cwa.googlegroups.com>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
	<1163411468.025376.171210@k70g2000cwa.googlegroups.com>
Message-ID: <ej9fsq$i3l$1@sea.gmane.org>

Eric_Dexter at msn.com wrote:

 > unless this is homework because the pil people will not let
> you distribute pils.

I'm not sure I can parse this sentence fragment.  What do you mean?

</F>



From fuzzyman at gmail.com  Mon Nov 27 15:55:41 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 27 Nov 2006 12:55:41 -0800
Subject: Calling a thread asynchronously with a callback
In-Reply-To: <4t0nr6F110supU1@mid.uni-berlin.de>
References: <mailman.774.1164649819.32031.python-list@python.org>
	<4t0nr6F110supU1@mid.uni-berlin.de>
Message-ID: <1164660941.428985.262350@l12g2000cwl.googlegroups.com>


Diez B. Roggisch wrote:
> Edwin Gomez wrote:
>
> > I'm a C# developer and I'm new to Python.  I would like to know if the
> > concept of Asynchronous call-backs exists in Python.  Basically what I
> > mean is that I dispatch a thread and when the thread completes it invokes
> > a method from the calling thread.  Sort event driven concept with threads.
>
> Counter question: does such a thing exist in C#, and if, is it bound to some
> existing event loop?
>
> I'm really curious, because having code being interrupted at any time by a
> asynchronous callback strikes me as dangerous. But then maybe I'm just a
> whimp :)
>

I've used them with Windows Forms,. The callback puts a message in the
event loop. It doesn't actually interrupt the code.

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

> Diez



From aisaac at american.edu  Sat Nov 11 16:11:38 2006
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 11 Nov 2006 21:11:38 GMT
Subject: handling many default values
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<pan.2006.11.11.14.04.33.220606@REMOVE.THIS.cybersource.com.au>
Message-ID: <e0r5h.165$5F2.28@trnddc04>

"Steven D'Aprano" wrote
> (1) If there really is no alternative to a class with many arguments;
> (2) and instances can vary those arguments unpredictably;
> then this approach seems reasonable to me. But I really suggest you
> rethink your class design.

Thanks to all who replied and to George for his specific example.
Steve's comments seem to summarize the overall sentiment:
there is no *general* objection, but I should make sure my
specific implementation really profits from a parameter holding class
(rather than, e.g., a super class in which appropriate defaults are set).
I believe this is the case, since the many parameters can vary
arbitrarily and do not fall into neat groupings.

Also, as an aside, no one objected to using
    self.__dict__.update(kwargs)
in the __init__ function of the parameter holding class.

Thanks,
Alan




From larry.bates at websafe.com  Fri Nov  3 16:32:36 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Nov 2006 15:32:36 -0600
Subject: py2exe questions
In-Reply-To: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
Message-ID: <454BB574.9030607@websafe.com>

Doug Stell wrote:
> I have 2 questions about py2exe or any similar utility.
> 
> 1. Is it possible to create a single Windows executable that does not
> blow out to a folder full of files and can be called from scripts
> using command line arguments?
> 
> 2. If the above can be done, it is possible to hide parts of the
> Python source code from users? These users are software developers,
> but we don't want them to see how the code does what it does.
> 
> thanks, doug

py2exe reduce the number of files you need to distribute down to 4:

msvcr71.dll
w9xpopen.exe  (Windows/98 support)
library.zip (all .pyo, .pyd, and .dll files)
applcation.exe


I does not however go to great lengths to "hide" the code from
someone with time/expertise that wants to get to your code
(but then just about anything can be disassembled).  The compiled
.pyo files are just placed in library.zip.  At least it doesn't
send your .py files along.

-Larry


From insyte at gmail.com  Tue Nov 14 11:41:11 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 14 Nov 2006 08:41:11 -0800
Subject: __cmp__ between dissimilar objects
In-Reply-To: <mailman.112.1163471381.32031.python-list@python.org>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<mailman.112.1163471381.32031.python-list@python.org>
Message-ID: <1163522471.707278.178600@e3g2000cwe.googlegroups.com>


> When the rich comparison methods raise NotImplementedError, the
> comparison logic inside the interpreter tries reversing the operands.

Can you point me to a description of this algorithm?  It doesn't seem
to be described in the documentation for the rich comparison or __cmp__
methods...

-Ben



From adrian.casey at internode.on.net  Tue Nov 14 04:30:16 2006
From: adrian.casey at internode.on.net (Adrian Casey)
Date: Tue, 14 Nov 2006 19:00:16 +0930
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>
Message-ID: <12lj35aqa9drd8a@corp.supernews.com>

Nick Craig-Wood wrote:

> Adrian Casey <adrian.casey at internode.on.net> wrote:
>>  I have a multi-threaded python application which uses pexpect to connect
>>  to
>>  multiple systems concurrently.  Each thread within my application is a
>>  connection to a remote system.  The problem is when one of the child
>>  threads runs a command which generates an unlimited amount of output. 
>>  The
>>  classic example of this is the "yes" command.  If you
>>  execute "pexpect.run('yes')", your cpu will sit at 100% forever.
>> 
>>  Here is a simple multi-threaded program using pexpect which demonstrates
>>  the
>>  problem.  The command 'yes' is run in a thread.  The parent says that
>>  when
>>  the alarm goes off, run the handler function.  The thread sets the alarm
>>  to trigger after 5 seconds.
> 
> 1) Don't ever mix threads and signals - you are heading for trouble!
> 
> 2) pexpect has a timeout parameter exactly for this case
> 
> import os, pexpect, threading
> 
> def runyes():
>         print "Running yes command..."
>         pexpect.run('yes', timeout=5)
> 
> t = threading.Thread(target=runyes)
> t.start()
> t.join()
> 
The timeout parameter will not work in this case.  If you run the sample
code above, it will run forever.  The 'yes' command presents a class of
command which can not be easily be handled by pexpect.  As far as I know,
mixing threads and signals is OK provided the parent creates the alarm.

Adrian.


From jan.danielsson at gmail.com  Thu Nov 30 23:32:26 2006
From: jan.danielsson at gmail.com (Jan Danielsson)
Date: Fri, 01 Dec 2006 05:32:26 +0100
Subject: UTF8 & HTMLParser
Message-ID: <456faf5e$1@griseus.its.uu.se>

Hello all,

   I'm writing a python script which fetches a HTML-page (using wget),
and then parses the retrieved page using a custom htmllib HTMLParser.

   The page I fetch is encoded in utf8, and my text-handler currently
looks like this:

   def handle_data(self, text):
      if self.inOption:
         self.currentName = text

   However, I would like to convert the "text" (which is utf8) to
latin-1. How do I do that? I've been trying to figure it out for some
time now, and I'm just getting frustrated. :-(

-- 
Kind Regards,
Jan Danielsson
Te audire non possum. Musa sapientum fixa est in aure.


From sjmachin at lexicon.net  Mon Nov  6 15:56:04 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 12:56:04 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <mailman.1818.1162845307.11739.python-list@python.org>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
Message-ID: <1162846564.782883.259110@h54g2000cwb.googlegroups.com>


Robert Kern wrote:

> However, I don't know of an encoding that takes u"f?dselsdag" to
> 'f\xc3\x83\xc2\xb8dselsdag'.

There isn't one.

C3 and C2 hint at UTF-8.
The fact that C3 and C2 are both present, plus the fact that one
non-ASCII byte has morphoploded into 4 bytes indicate a double whammy.

Cheers,
John



From johnjsal at NOSPAMgmail.com  Wed Nov  8 16:42:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 16:42:50 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <eitajt$bsk$03$1@news.t-online.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
Message-ID: <45524f40$0$32365$c3e8da3@news.astraweb.com>

Peter Otten wrote:

> You may need a no-op implementation of fix_attributes() in the Character
> class.

What does that mean? Is that in case I use Character directly to create 
an object? Would that just be a 'pass' statement?


From rridge at csclub.uwaterloo.ca  Sun Nov 19 22:13:30 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 19 Nov 2006 19:13:30 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
Message-ID: <1163992410.229236.60830@e3g2000cwe.googlegroups.com>

Martin v. L?wis wrote:
> One approach I had been considering is to always make the decoding
> succeed, by using the private-use-area of Unicode to represent bytes
> that don't decode correctly.

That would conflict with private use characters appearing in file
names.

Personally, I think os.listdir() should return the file names only in
Unicode if they're actually stored that way in the underlying file
system (eg. NTFS), otherwise return them as byte strings.  I doubt
anyone in this thread would like that, though.

                                      Ross Ridge



From beliavsky at aol.com  Tue Nov 14 10:07:53 2006
From: beliavsky at aol.com (Beliavsky)
Date: 14 Nov 2006 07:07:53 -0800
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <1163516873.105244.80870@e3g2000cwe.googlegroups.com>


erikcw wrote:
> Hi all,
>
> I have a collection of ordered numerical data in a list.

Called a "time series" in statistics.

> The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.
>
> Here is some sample data:
> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> 0.10]
>
> In this data, some of the significant points include:
> data[0]
> data[2]
> data[4]
> data[6]
> data[8]
> data[9]
> data[13]
> data[14]
> ....
>
> How do I sort through this data and pull out these points of
> significance?

The best place to ask about an algorithm for this is not
comp.lang.python -- maybe sci.stat.math would be better. Once you have
an algorithm, coding it in Python should not be difficult. I'd suggest
using the NumPy array rather than the native Python list, which is not
designed for crunching numbers.



From python.list at tim.thechases.com  Fri Nov  3 13:50:07 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 03 Nov 2006 12:50:07 -0600
Subject: ANN: SE 2.3. Available now
In-Reply-To: <454B8B8D.8010406@vtxmail.ch>
References: <454B3B49.6070702@vtxmail.ch>
	<454B6FEC.20709@islandtraining.com>	<eifrs9$gb0$1@sea.gmane.org>
	<454B8B8D.8010406@vtxmail.ch>
Message-ID: <454B8F5F.5050907@tim.thechases.com>

> nah, if you've spent more than five minutes on c.l.python lately, you'd 
> noticed that it's the Solution to Everything (up there with pyparsing, I 
> think).

SE would be the Solution to Everything.

pyparsing Provides Your Perfect Alternative where Regexp Syntax 
Is No Good.

The "re" module is just Routinely Expected to solve all problems.

:)

-tkc





From bj_666 at gmx.net  Thu Nov  9 11:32:27 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 09 Nov 2006 17:32:27 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
Message-ID: <pan.2006.11.09.16.32.26.351984@gmx.net>

In <mailman.1983.1163089419.11739.python-list at python.org>, Michael Hobbs
wrote:

> Python is already sensitive to whitespace and the newline anyway, so why 
> not put it to good use? For example, Python rejects this statement 
> because of the newline present:
>     if self.hungry or
>       self.depressed:
>         self.eat()
> You need to use the backslash to continue the expression on the next line:
>     if self.hungry or \
>       self.depressed:
>         self.eat()

You don't need the backslash if you use parenthesis:

  if (self.hungry
      or self.depressed):
      self.eat()

> I think the colon could be omitted from every type of compound 
> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?

I would miss auto-indenting in my editor to which the colon at the line
end is an important clue.

Ciao,
	Marc 'BlackJack' Rintsch


From laurent.pointal at limsi.fr  Tue Nov 21 10:56:18 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 21 Nov 2006 16:56:18 +0100
Subject: Software Compatable with other versions?
In-Reply-To: <1164113768.450227.161750@m73g2000cwd.googlegroups.com>
References: <mailman.534.1164111713.32031.python-list@python.org>
	<1164113768.450227.161750@m73g2000cwd.googlegroups.com>
Message-ID: <ejv7p3$egg$1@upsn250.cri.u-psud.fr>

georgeryoung at gmail.com a ?crit :
> On Nov 21, 7:24 am, "Michael Yanowitz" <m.yanow... at kearfott.com> wrote:
>>   I am still using Python 2.4.3, I haven't upgraded yet.
>> However, I would like to know if my 2.4.3 programs will run
>> in 2.5 without modification.
>>   Is there any way to test that my software is compatable
>> with 2.5 (or any other version), without actually installing
>> that version?:
> You need to install 2.5.  If you're on linux or similar OS, get the
> source and
> do
>   ./configure
>   make altinstall
> This installs almost everything, but does not overwrite your link to
> 2.4.3.
> 
> Then you can test your code using
>    python2.5 myfile.py
> 
> When you're all set, just change the link "python" to point to the new
> python2.5.

Hum, IMHO it's a bad idea to change the python link to another Python
version (other than de distro default).

Can put the Python version in script header (and make it executable)
#!/bin/env python2.5

Can write a small script shell starting the Python script with the
ad-hoc Python version.

>>   I have been told that the .pyc are not compatable. Is it
>> possible, to convert a 2.4.x .pyc to a 2.5 .pyc?

The magic code.

Just rm -rf *.pyc from your own scripts directories, they will be rebuilt.

A+

Laurent.


From phil at riverbankcomputing.co.uk  Sun Nov  5 08:11:21 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 5 Nov 2006 13:11:21 +0000
Subject: ANN: SIP v4.5 Released
Message-ID: <200611051311.21536.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of SIP v4.5 available 
from http://www.riverbankcomputing.co.uk/sip/.

SIP is a tool for generating Python modules that wrap C or C++ libraries.  It 
is similar to SWIG.  It is used to generate PyQt and PyKDE.  Full 
documentation is available at 
http://www.riverbankcomputing.com/Docs/sip4/sipref.html.

SIP is licensed under the Python License and runs on Windows, UNIX, Linux and 
MacOS/X.  SIP requires Python v2.3 or later.

The main focus of this release is support for Python v2.5.

Other features of SIP include:

- extension modules are implemented as a single binary .pyd or .so file (no
  Python stubs)
- support for Python new-style classes
- generated modules are quick to import, even for large libraries
- support for Qt's signal/slot mechanism
- thread support
- the ability to re-implement C++ abstract and virtual methods in Python
- the ability to define Python classes that derive from abstract C++ classes
- the ability to spread a class hierarchy across multiple Python modules
- support for C++ namespaces
- support for C++ exceptions
- support for C++ operators
- an extensible build system written in Python that supports over 50
  platform/compiler combinations
- the generation of API files for IDEs that support autocompletion and call
  tips.

Phil


From st911 at rock.com  Thu Nov 30 11:44:23 2006
From: st911 at rock.com (st911 at rock.com)
Date: 30 Nov 2006 08:44:23 -0800
Subject: *** Rogue OFFICIAL Bastards DEFAME the NAME of UNITED STATES of
	AMERICA ***
Message-ID: <1164905063.492726.115630@f1g2000cwa.googlegroups.com>

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

He and his family later sued the U.S. government for damages.

"We lived in 1984," Mayfield told reporters Wednesday. "I'm talking
about the George Orwell, frightening brave new world in which Big
Brother is constantly watching you." (Watch Mayfield discuss the case
Video)

"I, myself, have dark memories of stifling paranoia, of being
monitored, followed, watched, tracked," he said, choking back emotion.

"I've been surveilled, followed, targeted primarily because I've been
an outspoken critic of this administration and doing my job to defend
others who can't defend themselves, to give them their day in court,
and mostly for being a Muslim."

The government refused, he said, to tell him where they put their
cameras and surveillance devices, leaving his family wondering if their
private conversations and intimate moments were on display.

"The days and weeks and months following my arrest were some of the
hardest and darkest that myself and my family have ever had to endure,"
he said.

"And all because of this government's ill-conceived war on terror. ...
What I really want is for this not to happen to anyone else."

Wednesday's settlement includes not only a $2 million payment and an
apology, but also an agreement by the government to destroy
communications intercepts conducted by the FBI against Mayfield's home
and office during the investigation.

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

A Justice Department statement released Wednesday said Mayfield was not
targeted because of his Muslim faith and that the FBI had taken steps
to improve its fingerprint identification process "to ensure that what
happened to Mr. Mayfield does not happen again."

"Mr. Mayfield and his family felt it was in their best interest to get
on with their lives," said Mayfield's attorney, Elden Rosenthal.

"No amount of money can compensate Mr. Mayfield for being held as a
prisoner and being told he faced the death penalty [for the Madrid
bombings]."

Mayfield said his suit was not about money.

"It's about regaining our civil rights, our freedom and most important,
our privacy," he said.

He and his attorneys said the settlement will allow him to continue the
portion of his lawsuit challenging the constitutionality of the Patriot
Act.

Mayfield contends that his home was searched under provisions of the
Patriot Act.

====================================================================

Criminal, Rogue and RACIST elements have penetrated all the branches of
USA and world governments. We know that on 911 FBI bastards ran all
over in the neighborhood of Pentagon trying to  confiscate EVIDENCE of
the 911 crime that no Boeing Passenger Airliner hit Pentagon. They have
stil not released the evidence. 911 was inside job.

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, Mossad, PENTAGON AND THE WHITE HOUSE. Dont
forget that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, PENTAGON AND THE WHITE HOUSE. Dont forget
that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

THE ONLY ONLY REASON FBI DID THIS IS BECAUSE THEIR CRIME WAS
UNCONCEALABLE. UNDER THE PRETEXT OF SELF-DEFENSE, MANY OF THESE AGENCY
OFFICIALS HAVE COVERED THEIR CRIMES AND DESTROYED EVIDENCE OF THEIR
CRIMES.

FBI COVERED UP A CHILD PEDOPHILIA RING THAT WAS LINED TO REAGAN AND
HERBERT WALKER BUSH. There is a VIDEO on google of the investigation.



From emin.shopper at gmail.com  Fri Nov  3 14:54:47 2006
From: emin.shopper at gmail.com (emin.shopper at gmail.com)
Date: 3 Nov 2006 11:54:47 -0800
Subject: emacs shell hangs on W32 with python
References: <1162508249.399337.233170@m73g2000cwd.googlegroups.com>
	<uu01hko4n.fsf@rkspeed-rugby.dk>
	<1162563579.312620.247480@b28g2000cwb.googlegroups.com>
	<mailman.94.1162565107.2155.help-gnu-emacs@gnu.org>
	<1162567058.729292.316730@h54g2000cwb.googlegroups.com>
	<mailman.98.1162569138.2155.help-gnu-emacs@gnu.org>
Message-ID: <1162583687.764788.77440@h54g2000cwb.googlegroups.com>

Lennart Borgman wrote:
> Could you then please post a bug report? Just choose "Help - Send bug
> report" from the menus.

I sent a bug-report to the emacs list as requested and got an email
reply saying the message is being held for a moderator to look at.
Since the bug seems to be in the interaction of emacs with python, I'm
also cross-posting this to comp.lang.python in case anyone there can
help. (Note this bug shows up in all the versions of emacs that I have
tried including Xemacs and GNU Emacs 21).

The body of the bug-report is below:

I started emacs with -q did ESC-x shell and entered the following

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

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

h:\projects\arcp_db\trunk\src\gui>c:\python25\python.exe -i
c:\python25\python.exe -i
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
>>> t = Tkinter.Tk()
>>> 2

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

Note that after the call to Tkinter.Tk() my python window freezes and
no longer works. Killing the Tk window does not help. I realize that
this may seem like a bug in python and not emacs except that if I do
exactly the same thing through a dos shell I have no problems (i.e.,
python keeps accepting input). Consequently, it seems like emacs is
doing something funky when running the shell that interferes with
python in a way that running the shell without emacs would not do.


Sincerely,
-Emin Martinian


In GNU Emacs 23.0.0.1 (i386-mingw-nt5.1.2600)
 of 2006-10-16 on DTOP
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.1) --cflags  -O2 -g0
-march=i386 -mtune=i686 -pipe -IC:/gnuwin32/include_emacs
-IC:/gnuwin32/lib -IC:/gnuwin32/src --ldflags  -s '

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu>
<report-emacs-bug>

Recent messages:
(c:\Program Files\emacs-23\ntemacs23\bin\emacs.exe -q)
Loading encoded-kb...done
For information about the GNU Project and its goals, type C-h C-p. [2
times]
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done



From gagsl-py at yahoo.com.ar  Sat Nov 18 00:23:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 18 Nov 2006 02:23:40 -0300
Subject: How can I speed this function up?
In-Reply-To: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <7.0.1.0.0.20061118014221.01d63440@yahoo.com.ar>

At Friday 17/11/2006 23:40, Chris wrote:

>This is just some dummy code to mimic what's being done in the real
>code. The actual code is python which is used as a scripting language in
>a third party app. The data structure returned by the app is more or
>less like the "data" list in the code below. The test for "ELEMENT" is
>necessary ... it just evaluates to true every time in this test code. In
>the real app perhaps 90% of tests will also be true.
>
>So my question is how can I speed up what's happening inside the
>function write_data()? Only allowed to use vanilla python (no psycho or
>other libraries outside of a vanilla python install).
>
>I have a vested interest in showing a colleague that a python app can
>yield results in a time comparable to his C-app, which he feels is mch
>faster. I'd like to know what I can do within the constraints of the
>python language to get the best speed possible. Hope someone can help.

If you can assume that all items have 6 numbers, it appears best to 
unroll the inner iteration. Below is my best attempt with ideas from 
other replies too, including some alternatives. The timing is only 
approximate and had a wide dispersion; median of three. But it's 
clear that the main gain comes from calling out.write only once:

Notice that you can't, in general, use i[0] is 'ELEMENT' unless you 
can guarantee that i[0] is an interned string (and if it comes from 
another process, chances are it isn't). Using intern(i[0]) is 
'ELEMENT' would work, but slows down your program.

# initial: 11.66s
def write_data1(out, data):
      write = out.write
      for i in data:
          if i[0] == 'ELEMENT': # sorry but can't guarantee identity

# 6.21s
              write("ELEMENT %06d %s\n" % (i[1], "%d %d %d %d %d %d " % i[2]))

# 6.92s
#             write("ELEMENT %06d %s \n" % (i[1], " ".join(map(str,i[2]))))

# 8.30s [i]
#             i2 = i[2]
#             write("ELEMENT %06d %d %d %d %d %d %d \n" % (i[1], 
i2[0], i2[1], i2[2], i2[3], i2[4], i2[5]))

# 7.04s __getitem__
#            i2 = i[2].__getitem__
#            write("ELEMENT %06d %d %d %d %d %d %d \n" % (i[1], 
i2(0), i2(1), i2(2), i2(3), i2(4), i2(5)))



-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From p.lavarre at ieee.org  Fri Nov 10 09:11:24 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 06:11:24 -0800
Subject: announce: FAQs suggested
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>
	<ej20b4$rjj$02$1@news.t-online.com>
Message-ID: <1163167884.303515.257820@k70g2000cwa.googlegroups.com>

> > > http://effbot.org/pyfaq/suggest.htm
> > FAQ: How do I say returns void in ctypes?
> That's in the ctypes documentation, where it belongs.

Thank you, before I never had found "Use None for void a function not
returning anything" at:
http://starship.python.net/crew/theller/ctypes/reference.html

Now I see, that find corresponds to:
http://docs.python.org/dev/lib/ctypes-foreign-functions.html

I think this remains an FAQ, because I see void is missing from much
more prominent places:
http://docs.python.org/dev/lib/node452.html "Fundamental data types"
http://docs.python.org/dev/lib/ctypes-return-types.html

Finding a way to suggest improving those docs would help more than
suggesting an FAQ, I agree.

> > > > http://effbot.org/pyfaq/suggest.htm
> > FAQ: How do I say unsigned char in ctypes?
> That's in the ctypes documentation, where it belongs.

Yes and no.  The whole FAQ suggested was:

FAQ: How do I say unsigned char in ctypes?
A: ctypes.c_ubyte
ctypes doesn't define c_uchar. This actually is doc'ed, it's just
annoying.

Per your kind correction above re void, I see we could also say:

FAQ: How do I say returns void in ctypes?
A: restype = None
ctypes doesn't define c_void. This actually is doc'ed obscurely, it's
just irregular.



From horpner at yahoo.com  Tue Nov  7 09:47:29 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 7 Nov 2006 15:47:29 +0100
Subject: Simple Tkinter problem
References: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>
Message-ID: <slrnel1763.1mk.horpner@FIAD06.norwich.edu>

On 2006-11-07, gmarkowsky at gmail.com <gmarkowsky at gmail.com> wrote:
> I'm trying to write a GUI that will put up multiple widgets in
> succession. My problem is that each widget also contains the
> previous widgets when they pop up. How do I reinitialize the
> widget each time so that it doesn't contain earlier ones?

Show your code.

> Actually, another question I have is, is there a way to set
> python so that it will assume any undefined variable is 0 or
> ''? That is, I have several statements like "If k > 0 then so
> and so" and I would like it to assume k=0 unless I tell it
> otherwise. I've just been defining k=0 at the start of the
> program but it seems there should be a better way.

The best way to do it is to never use undefined names.

-- 
Neil Cerutti
If only faces could talk. --Pat Summerall


From johnjsal at NOSPAMgmail.com  Wed Nov  8 16:36:02 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 16:36:02 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <45524d03$0$32427$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45523133$0$14421$c3e8da3@news.astraweb.com>
	<eith0g$t7e$02$1@news.t-online.com>
	<45524d03$0$32427$c3e8da3@news.astraweb.com>
Message-ID: <45524da8$0$32427$c3e8da3@news.astraweb.com>

John Salerno wrote:
> Peter Otten wrote:
> 
>> Try it: Fighter(...) will implicitly call Character.__init__(...).
> 
> Ok, I'm confused! :) I thought you had to explicity call a base class's 
> __init__ method? How is it doing this?

Wait, I just might be an idiot. Is it not even necessary for me to call 
Character's __init__ method? Fighter will inherit it automatically and 
call it when a Fighter object is created, right?

If that's the case, then I don't know what I was thinking! I guess I was 
thinking more along the lines of how in wxPython, when you subclass a 
Frame, you have to call Frame.__init__, but maybe that's only because 
you then do your own stuff in a custom __init__ class, which would have 
otherwise overridden the Frame.__init__.

In this case, I need Character.__init__ and nothing else, right? Now 
your other method is making sense to me too! :)


From robert.kern at gmail.com  Sat Nov  4 01:35:01 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Nov 2006 00:35:01 -0600
Subject: Python in sci/tech applications
In-Reply-To: <1162590264.209704.316800@b28g2000cwb.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162590264.209704.316800@b28g2000cwb.googlegroups.com>
Message-ID: <eihcas$l4i$1@sea.gmane.org>

Thomas Nelson wrote:
> How hard would it be to have numpy/ scipy part of the python standard
> library?

scipy will never, ever be part of the standard library. Some subset of numpy may
eventually make it into the standard library, but not any time soon.

-- 
Robert Kern

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



From michele.simionato at gmail.com  Tue Nov 14 03:26:16 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 14 Nov 2006 00:26:16 -0800
Subject: handling many default values
In-Reply-To: <mailman.85.1163445959.32031.python-list@python.org>
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<pan.2006.11.11.14.04.33.220606@REMOVE.THIS.cybersource.com.au>
	<e0r5h.165$5F2.28@trnddc04>
	<1163435611.128470.146660@f16g2000cwb.googlegroups.com>
	<mailman.85.1163445959.32031.python-list@python.org>
Message-ID: <1163492776.381839.261030@e3g2000cwe.googlegroups.com>

Gabriel Genellina wrote:
> At Monday 13/11/2006 13:33, Michele Simionato wrote:
>
> >Alan Isaac wrote:
> > > Also, as an aside, no one objected to using
> > >     self.__dict__.update(kwargs)
> > > in the __init__ function of the parameter holding class.
> >
> >It is a common trick, also shown in the Python cookbook, IIRC. If you
> >are anal about
> >double underscores, you can also use
> >
> >vars(self).update(kwargs)
>
> Not good - that relies on vars() returning the actual __dict__.
>  From <http://docs.python.org/lib/built-in-funcs.html>:
> "The returned dictionary should not be modified: the effects on the
> corresponding symbol table are undefined."

I believe the issue is with classes, where vars(klass) returns a
dictproxy which is read only.
In the case of instances (i.e. the OP' case) vars(self) returns the
instance dictionary and
my suggestion is correct. However you was right to point out this
subtility, it is always
worth to know.

           Michele Simionato



From piet at cs.uu.nl  Fri Nov 24 16:30:46 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Fri, 24 Nov 2006 22:30:46 +0100
Subject: How good is CORBA?
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
	<45634A59.5080501@wiggly.org>
	<mailman.547.1164135389.32031.python-list@python.org>
Message-ID: <m2zmagwn09.fsf@ordesa.lan>

>>>>> "Chris Mellon" <arkanes at gmail.com> (CM) wrote:

>CM> FYI: Ice is available under the GPL, so if by "pay" you mean "pay
>CM> money" that's not your only option. You can also get a commercial
>CM> license, similiar to Qt.

>CM> I like Ice a lot, it's got hardly any of the ramp up time and learning
>CM> curve that CORBA does, and it's extremely efficent. If GPL or cash are
>CM> acceptable licensing options to you, then I encourage you to use it
>CM> before you head to CORBA.

OmniORB's author did some benchmarking and it appeared that omniORB was
faster than Ice.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From tomas at fancy.org  Tue Nov 21 20:47:02 2006
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 21 Nov 2006 17:47:02 -0800
Subject: wx.Process.Kill on Win32
Message-ID: <1oa7m2h7k1fn4ifnp2t4u0ds3nnlv5ctp6@4ax.com>

Google indicates that wx.Process.Kill hadn't been implemented some
time ago in wxPython for Win32.  Is that still the case?  It's kind of
a drag since several sources (including wxPython wiki) strongly advise
(by my reading and intended use) using wxProcess over the built-in
stuff, but it's not entirely useful if I can't kill long-running
processes from an external driver.

To tie into my previous question about mocking in Python, I've got a
bunch of scripts that do a bunch of things, and there's one 'master'
script which can serialize these things (connecting to databases,
downloading lots of data, and applying transforms to that data).  I
realized that the GUI part could essentially just be a command line
generator for the serializer script, and trivially launch the other
activities as a separate process.  I/O works pretty well and I was
happy with it all until I tried to implement the 'Cancel' button.

Any more info, now several years after those threads I turned up?

thx,
-tom!


From soring at gmail.com  Sat Nov  4 00:58:38 2006
From: soring at gmail.com (soring at gmail.com)
Date: 3 Nov 2006 21:58:38 -0800
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<1162590557.043667.20130@m73g2000cwd.googlegroups.com>
	<454baf57$0$12123$88260bb3@free.teranews.com>
Message-ID: <1162619918.120539.154960@m7g2000cwm.googlegroups.com>

WSDL is a way to describe a webservice (using a XML dialect) in terms
of: operations (that have input and output messages) and endpoints (the
actual URL to access the webservice).

When you accessed your other guy's URL, the "XML API description" you
got back was the actual WSDL. So it wasnt' that the URL he gave you was
the WSDL, but the actual XML.

SOAP is another XML dialect: one sends SOAP messages to the enpoints
defined in a WSDL to access a webservice. Usually, the messages defined
in a WSDL are the same as the SOAP body part.

So WSDL is a very strict way to define webservice APIs, and it covers a
lot of aspects of webservices (it has extensions for transactions,
security, reliable messaging, etc).

By contrast, XMLRPC is a much more loose standard to send data around
the web in XML format - it doesn't attempt to regulate too many aspects
of webservices, so it's easier to understand and use to start with.

To answer your first question as well: to use WSDL for in-house
communication sounds like a lot of overkill to me - but on the other
hand, if you ever plan to externalize that data (say your company
decides to publish some internal module X as a webservice), than it's
good to use WSDL to start with.

This is the theory :-) Before deciding what standard to use, make sure
that your programming language/framework supports it well, otherwise
it's no fun.

Sorin


tobiah wrote:
> I recently wrote a SOAP client(?) to read what the guy from
> the other company called a WSDL, which was just a URL that
> served an XML API description.  Is that the same as XMLRPC
> (I ask because you mention SOAP).
>
> Thanks,
>
> Toby
>
> WakeBdr wrote:
> > XMLRPC and SOAP are the two I'm working with right now.
> >
> >
> > tobiah wrote:
> >> Is WSDL the right answer for in house communication
> >> between programs written in different languages, or
> >> is it more for publishing interfaces for use by parties
> >> outside your own company?
> >>
> >> What else is available for sharing complex structures
> >> with processes running programs that were written in
> >> other languages?
> >>
> >> Thanks,
> >>
> >> Toby
> >>
> >> --
> >> Posted via a free Usenet account from http://www.teranews.com
> >
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com



From fredrik at pythonware.com  Sat Nov 18 09:03:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 15:03:30 +0100
Subject: Having trouble converting popen2 to subprocess
In-Reply-To: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>
References: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>
Message-ID: <ejn3rm$iht$1@sea.gmane.org>

Daniel Klein wrote:

> Now here is my attempt to use the 'subprocess' module :
> 
> from subprocess import *
> p = Popen(r'c:\home\hw.exe', bufsize=-1, stdin=PIPE, stdout=PIPE,
> universal_newlines=True)
> fin = p.stdin

p.stdin is the *other* process' stdin.  if you want to read things it 
prints, read from p.stdout instead.

> print fin.readline()
> fin.close()

</F>



From johnjsal at NOSPAMgmail.com  Mon Nov  6 16:11:01 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 06 Nov 2006 16:11:01 -0500
Subject: sqlite error?
Message-ID: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>

Am I using the ? placeholder wrong in this example?


t = ('hi', 'bye')

self.connection.execute("INSERT INTO Personal (firstName, lastName) 
VALUES ?", t)



Traceback (most recent call last):
   File "C:\Python25\myscripts\labdb\dbapp.py", line 93, in OnSaveRecord
     self.save_to_database(textfield_values)
   File "C:\Python25\myscripts\labdb\dbapp.py", line 97, in save_to_database
     self.connection.execute("INSERT INTO Personal (firstName, lastName) 
VALUES ?", t)
sqlite3.OperationalError: near "?": syntax error


From horpner at yahoo.com  Thu Nov 30 13:33:05 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Nov 2006 19:33:05 +0100
Subject: Automatic increment
References: <8094b1b60611301008n36969305p48bec2c8a0e10ec1@mail.gmail.com>
	<mailman.888.1164911307.32031.python-list@python.org>
Message-ID: <slrnemu91f.4k.horpner@FIAD06.norwich.edu>

On 2006-11-30, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:
> Gheorghe Postelnicu schrieb:
>> Hi,
>> 
>> I have a situation of the following type:
>> 
>> for line in lineList:
>>     for item in line.split()
>>         myArray[counter, itemCounter]
>>         itemCounter = itemCounter + 1
>>     counter = counter +1
>> 
>> Is there a way to get rid of the manual incrementation of the 2 counters?
>> 
>> Thanks,
>
> for counter in xrange(len(lineList)):
> 	for itemCounter in xrange(len(lineList[counter].split()))
> 		myArray[counter, itemCounter]

I was going to suggest replacing the whole loop with nothing as
the best way of removing the manual counters.

-- 
Neil Cerutti


From rNOSPAMon at flownet.com  Thu Nov 30 14:58:52 2006
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Thu, 30 Nov 2006 11:58:52 -0800
Subject: Is there a reason not to do this?
Message-ID: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>


One of the things I find annoying about Python is that when you make a 
change to a method definition that change is not reflected in existing 
instances of a class (because you're really defining a new class when 
you reload a class definition, not actually redefining it).  So I came 
up with this programming style:

def defmethod(cls):
  return lambda (func): type.__setattr__(cls, func.func_name, func)

class c1(object): pass

@defmethod(c1)
def m1(self, x): ...


Now if you redefine m1, existing instances of c1 will see the change.

My question is: is there a reason not to do this?  Does it screw 
something up behind the scenes?  Is it unpythonic?  Why isn't this 
standard operating procedure?

rg


From python at hope.cz  Tue Nov 21 14:15:47 2006
From: python at hope.cz (Lad)
Date: 21 Nov 2006 11:15:47 -0800
Subject: How to sort list
Message-ID: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>

I have a list of emails and I would like to sorted that list by domains
E.g.
If the list is

Emails=['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com',....]

after sorting I would like to have
Emails=['a at hotmail.com','b at hotmail.com','a at yahoo.com','c at yahoo.com',....]

What is the best/easiest way?

Thank you for help
L.



From no-spam at no-spam-no-spam.invalid  Fri Nov  3 17:38:42 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 23:38:42 +0100
Subject: numpy help
In-Reply-To: <mailman.1741.1162592618.11739.python-list@python.org>
References: <mailman.1741.1162592618.11739.python-list@python.org>
Message-ID: <eiggdj$4fg$1@news.albasani.net>

Chris Smith wrote:
> Howdy,
> 
> I'm a college student and for one of we are writing programs to
> numerically compute the parameters of antenna arrays. I decided to use
> Python to code up my programs. Up to now I haven't had a problem,
> however we have a problem set where we are creating a large matrix and
> finding it's inverse to solve the problem. To invert the matrix I've
> tried using numpy.numarray.linear_algebra.inverse and
> numpy.oldnumeric.linear_algebra.inverse which both give me the same
> error ( I was hoping they called different routines but I think they
> call the same one ).
> 

try scipy.linalg.inv etc. 

(you are using outdated old NumPy modules with recent array type which sometimes creates type conflicts. 

robert



From bobjohnson11 at gmail.com  Fri Nov  3 17:36:39 2006
From: bobjohnson11 at gmail.com (RobJ)
Date: 3 Nov 2006 14:36:39 -0800
Subject: PySchool - Online Python Web Framework Workshop.
Message-ID: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>

Hi! My Name is Rob Johnson and I am a graduate student at The Richard
Stockton College of NJ. To make a long story short, I'm working on my
Masters project in the MAIT program (Masters of Arts in Instructional
Technology). I have written a proposal to put together a free on-line
Python web framework workshop. The workshop will be geared to help
people new to Python web frameworks. I am asking for the community's
assistance to help me get this project off the ground. As part of my
project, I am conducting a survey for people who are interested in
learning more about python web frameworks.  The survey is located at
http://killersurvey.com/answer_survey.php?id=479. I have also started a
blog about this experience in order to let people know what I'm doing
(http://pyschool.blogspot.com/). If you have a few minutes, please take
a couple of minutes to take the quick survey. The survey is anonymous
and the information will be used for statistics for my project. Also,
any constructive feedback or suggestions that you can give me would be
gladly appreciated.  

Thanks

Rob J



From fredrik at pythonware.com  Wed Nov 29 11:32:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 17:32:43 +0100
Subject: trouble writing results to files
In-Reply-To: <1164817139.688429.120410@14g2000cws.googlegroups.com>
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>	<ekk8kh$4lo$2@cernne03.cern.ch>
	<1164817139.688429.120410@14g2000cws.googlegroups.com>
Message-ID: <ekkcnb$euo$1@sea.gmane.org>

lisa.engblom at gmail.com wrote:

> I can try that.  Is using range(len(a)) a bad solution in the sense
> that its likely to create an unexpected error? Or because there is a
> more efficient way to accomplish the same thing?

for-in uses an internal index counter to fetch items from the sequence, so

     for item in seq:
         function(item)

is simply a shorter and more efficient way to write

     for item in range(len(seq)):
         function(seq[item])

also see this article:

     http://online.effbot.org/2006_11_01_archive.htm#for

</F>



From sxn02 at yahoo.com  Tue Nov  7 14:06:01 2006
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Tue, 7 Nov 2006 11:06:01 -0800 (PST)
Subject: But it was yesterday here!
Message-ID: <20061107190601.59004.qmail@web56013.mail.re3.yahoo.com>

> I bet you have an email.py somewhere in your sources... 

You won the bet. I owe you one :-)

Thanks,
Sorin



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From breakfastea at gmail.com  Sat Nov 11 00:35:55 2006
From: breakfastea at gmail.com (Camellia)
Date: 10 Nov 2006 21:35:55 -0800
Subject: UnboundLocalError
In-Reply-To: <Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1163223355.190176.127030@h48g2000cwc.googlegroups.com>

Thank you all so much for all the replies:)

But sorry I'm so dumb I can't say I really understand,
what do I actually do when I define a function with its name "number"?
why does a name of a function has something to do with a variable?

Oh wait can I do this in Python?:
<code>
def a():
    def b()
</code>

so the b() will appear to be a local function which is the possible
cause of my little own error because the compiler will interpret the
number() as a local function but a global one?



On Nov 10, 7:32 am, Rob Williscroft <r... at freenet.co.uk> wrote:
> Terry Reedy wrote innews:mailman.1994.1163100168.11739.python-list at python.orgin
> comp.lang.python:
>
> >> def main():
> >>    number = number()
>
> > Within a function, a given name can be either global or local, but not
> > both.
> > Here you are expecting the compiler to interpret the first occurance
> > of 'number' as local and the second as global.  Humans can often
> > resolve such ambiguities correctly, but not necessarily always.  So
> > this is too much to ask of a program and hence it is not allowed.".. asked too much of the programme", sounds like a BOFH excuse to
> me ;-).
>
> Seriously I'd bet (if I were a gambling man) that this is by design,
> not either of "too much work for the interpreter" or "nobody's
> submitted a patch".
>
> IOW: Why should the intepreter do more work just so the user
> can find new and interesting ways to shoot them selves in the foot.
> 
> Rob.
> --http://www.victim-prime.dsl.pipex.com/



From Leo.Kislov at gmail.com  Fri Nov 17 03:54:02 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 17 Nov 2006 00:54:02 -0800
Subject: how to print pdf with python on a inkjet printer.
References: <mailman.277.1163700699.32031.python-list@python.org>
Message-ID: <1163753642.836452.294300@h54g2000cwb.googlegroups.com>


krishnakant Mane wrote:
> hello all.
> I am developing an ncurses based python application that will require
> to create pdf reports for printing.
> I am not using py--qt or wx python.
> it is a consol based ui application and I need to make a pdf report
> and also send it to a lazer or ink jet printer.
> is it possible to do so with python?
> or is it that I will have to use the wxpython library asuming that
> there is a print dialog which can open up the list of printers?
> if wx python and gui is the only way then it is ok but I will like to
> keep this application on the ncurses side.

Assuming you are on a UNIX-like system, you really need to setup CUPS
<http://www.cups.org/> (or may be your system already provides CUPS).
PDF seems to be the future intermediate format for UNIX printing
<http://www.linux.com/article.pl?sid=06/04/18/2114252> and CUPS already
supports printing PDF files, just run "lp your_file.pdf" to print a
file. CUPS only have command line interface:
<http://www.cups.org/documentation.php/options.html>

  -- Leo



From sjmachin at lexicon.net  Wed Nov 22 05:28:04 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 02:28:04 -0800
Subject: Is there a list comprehension for this?
In-Reply-To: <pan.2006.11.22.10.17.59.870599@REMOVE.THIS.cybersource.com.au>
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>
	<1164171602.525542.56750@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.10.17.59.870599@REMOVE.THIS.cybersource.com.au>
Message-ID: <1164191284.251308.316810@f16g2000cwb.googlegroups.com>


Steven D'Aprano wrote:
> On Tue, 21 Nov 2006 21:00:02 -0800, John Machin wrote:
>
> > Steven D'Aprano wrote:
> >
> > [snip]
> >
> >> def running_sum(dw):
> >>     """Return a list of the running sums of sequence dw"""
> >>     rs = [0]*len(dw)
> >>     for i in range(len(dw)):
> >>         rs[i] = dw[i] + rs[i-1]
> >
> > Please explain to the newbies why there is no exception raised when
> > rs[i-1] is executed for i == 0, and state whether you consider this is
> > a Good Idea or a Filthy Trick or a Fortunate Accident.
>
> Because rs[0-1] is just rs[-1], which fetches the LAST item of the list. I
> cunningly initialised the list to all zeroes, so adding zero to the first
> term doesn't change the result value.
>
> It is a variation of the sentinel technique, where you add an extra value
> to the beginning or end of a list so that you don't need to treat the
> first or last item differently. In this specific case, I think it is a
> combination of Good Idea and Fortunate Accident, but since the
> meaning of list[-1] is both deliberate and well-documented, it is
> certainly not a Filthy Trick.
>

Fair enough. But it does make the concerned reader go back a couple of
lines to see why it doesn't run amok. Here's my attempt at a
no-reader-backtracking solution:

def running_sum_2(dw):
    rs = dw[:1]
    for i in xrange(1, len(dw)):
        rs.append(dw[i] + rs[-1])
    return rs

Comments invited.

Cheers,
John



From john at castleamber.com  Thu Nov 16 13:37:41 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 18:37:41 GMT
Subject: Python v PHP: fair comparison?
References: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>
	<mailman.276.1163700314.32031.python-list@python.org>
Message-ID: <Xns987D8074C6846castleamber@130.133.1.4>

Tim Chase <python.list at tim.thechases.com> wrote:

> Demel, Jeff wrote:
>> Walterbyrd wrote:
>>> Okay, where can I get Python and Apache 2.X for $10 a year?
>> 
>> Webfaction.com
> 
> Um, I think you're off by an order of magnitude.  Walterbyrd 
> asked about $10/*year* and webfaction.com charges $7.50/*month*. 
>     Well, I suppose if one only needed one and a third months of 
> hosting during the course of the year, it might do for ya. ;-)
> 
> I can't say I've come across any hosting places that serve up PHP 
> for $10/yr either...the closest I've found is about $3.50/mo 
> (which also provides Python CGI).

hostingforabuck.com, $12/year and I am sure that Python CGI is no problem 
at all.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From john106henry at hotmail.com  Mon Nov  6 19:23:08 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Nov 2006 16:23:08 -0800
Subject: shutil: permission denied errors on windows
In-Reply-To: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
Message-ID: <1162858987.931532.61530@h48g2000cwc.googlegroups.com>

I use the copy function a lot and never have problem.  I suggest that
you write a no brainer standalone test code and if it still fails
there, then you have a problem with your installation.

Antoine De Groote wrote:
> Google tells quite some things about it, but none of them are satisfactory.
>
> I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13]
> Permission denied all the time, for the source files. It seems that this
> is the case for all my files. But what I don't understand is that
> yesterday it still worked. I didn't change anything on my system though
> (at least not that I am aware of). I restarted the computer several
> times to see if that helped, but it didn't. Also I can't find a process
> that would be using the files...
>
> Has anybody experienced this problem before, or have a solution?
>
> Kind regards,
> antoine
>
> Here's the code that throws the errors
>
> [...]
> for l in files:
>              from_file = os.path.join(dir, l)
>              to_file = from_file.replace(tree_top, backup_dir)
>              try:
>                  if not os.path.exists(to_file):
>                      log('Copying new      %s' % from_file)
>                      counter_new += 1
>                      shutil.copy2(from_file, to_file)
>                  elif int(os.path.getmtime(from_file)) >
> int(os.path.getmtime(to_file)):
>                      log('Copying modified %s' % from_file)
>                      counter_mod += 1
>                      shutil.copy2(from_file, to_file)
>                  elif os.path.getsize(from_file) > os.path.getsize(to_file):
>                      log('Sizes differ, but not rest: Copying %s' %
> from_file)
>                      counter_special += 1
>                      shutil.copy2(from_file, to_file)
>                  elif os.path.getsize(from_file) < os.path.getsize(to_file):
>                      log('Orig file smaller than backup file: Copying
> %s' % from_file)
>                      counter_special += 1
>                      shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
>                      shutil.copy2(from_file, to_file)
>                  else:
>                      #log('not treated: %s' % l)
>                      pass
>
>              except (OSError, IOError), e:
>                  not_accessible += 1
>                  print e
> [...]



From rrr at ronadam.com  Wed Nov  1 17:19:13 2006
From: rrr at ronadam.com (Ron Adam)
Date: Wed, 01 Nov 2006 16:19:13 -0600
Subject: Style for modules with lots of constants
In-Reply-To: <slrnekhjt8.1ok.horpner@FIAD06.norwich.edu>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>	<1162398506.919161.145290@m7g2000cwm.googlegroups.com>
	<slrnekhjt8.1ok.horpner@FIAD06.norwich.edu>
Message-ID: <eib6nv$vj4$1@sea.gmane.org>

Neil Cerutti wrote:
> On 2006-11-01, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
>> Neil Cerutti:
>>> scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
>>>    'WriteAppend', 0)
>> That "+" sign seems useless. A space looks enough to me. The
>> functions can accept case-agnostic strings and ignore spaces
>> inside them. Example:
>> ('transcript textmode ', 'writeappend', 0)
> 
> That's pretty cool. Not as pretty, but easier for users,
> possibly.
> 
>>> Parsing the combinable bitfield contants might be slowish,
>>> though.
>> I think you have to test if this is true for your situation.
>> Management of interned strings is probably fast enough
>> (compared to the rest of things done by the Python interpreter)
>> for many purposes.
> 
> Agreed. I meant I'd have to later test if it's were fast enough.

I've found using plain strings as flags has several advantages.

The value 'textmode' is always 'textmode', there is no dependency on a module or 
class being imported or initialized.

It avoids having to type namespace prefixes such as thismod.textmode, or 
myclass.textmode or importing a bunch of values into global name space.

Strings comparisons in python are very fast.

The disadvantage is an invalid flag may pass silently unless you do some sort of 
validation which may slow things down a bit.

Ron





From rtw at freenet.co.uk  Sat Nov 25 19:10:12 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sat, 25 Nov 2006 18:10:12 -0600
Subject: case insensitive dictionary
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
Message-ID: <Xns98871D10FED3rtwfreenetREMOVEcouk@216.196.109.145>

John Henry wrote in news:1164494606.514366.124810
@l39g2000cwd.googlegroups.com in comp.lang.python:

> I believe the standard dictionary should be amened to allow the use of
> case insensitive keys - as an option.  

class idict( dict ):

  class __istr( str ):

    def __eq__( self, other ):
      return self.lower() == other.lower()    

    def __hash__( self ):
      return self.lower().__hash__()

  def __setitem__( self, k, v ):
    dict.__setitem__( self, idict.__istr( k ), v )

d = idict( a = 1, b = 2 )
d['A'] = 3

print d

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From johnjsal at NOSPAMgmail.com  Wed Nov  8 14:33:01 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 14:33:01 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <eitajt$bsk$03$1@news.t-online.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
Message-ID: <45523133$0$14421$c3e8da3@news.astraweb.com>

Peter Otten wrote:

> One way to avoid the repetition:
> 
> class Character(object):
>     def __init__(self, name, strength, dexterity, intelligence):
>         self.name = name
>         self.health = 10
>         self.strength = strength
>         self.dexterity = dexterity
>         self.intelligence = intelligence
>         self.fix_attributes()
> 
> class Fighter(Character):
>     def fix_attributes(self):
>         self.health += 2
>         self.strength += 1
> 
> You may need a no-op implementation of fix_attributes() in the Character
> class.
> 
> Peter

But how does this take care of the initialization of the stats? I won't 
be able to use Fighter to create a character without doing everything in 
Character, right?


From bignose+hates-spam at benfinney.id.au  Fri Nov  3 03:00:09 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 03 Nov 2006 19:00:09 +1100
Subject: Javascript is turning into Python?!
References: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
Message-ID: <87u01h2c52.fsf@benfinney.id.au>

Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

> I hadn't seen this before.  New Javascript 1.7 features:
> - Generators
> - Iterators
> - Array comprehensions
> - Destructuring assignment
>
> Sounds like another language we know.

The current developers of Javascript have been quite open during
development of 1.7 that they have been inspired by Python for many of
the new features. (Tried to find a URL, but my search-fu is weak
today.)

-- 
 \     "Try to become not a man of success, but try rather to become a |
  `\                                man of value."  -- Albert Einstein |
_o__)                                                                  |
Ben Finney



From Roberto.Bonvallet at cern.ch  Thu Nov 30 04:52:35 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 30 Nov 2006 09:52:35 +0000 (UTC)
Subject: for i in range() anti-pattern [was Re: trouble writing results to
	files]
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
Message-ID: <ekm9l3$u2h$1@cernne03.cern.ch>

Steven D'Aprano wrote:
> On Wed, 29 Nov 2006 17:00:30 +0100, Fredrik Lundh wrote:
> 
>> Neil Cerutti wrote:
>> 
>>>> BTW, iterating over range(len(a)) is an anti-pattern in Python.
>>> 
>>> Unless you're modifying elements of a, surely?
>> 
>> and needs to run on a Python version that doesn't support enumerate.
> 
> This isn't meant as an argument against using enumerate in the common
> case, but there are circumstances where iterating with an index variable
> is the right thing to do. "Anti-pattern" tends to imply that it is always
> wrong.

Right, I should have said:  "iterating over range(len(a)) just to obtain the
elements of a is not the pythonic way to do it".

Cheers,
-- 
Roberto Bonvallet


From fredrik at pythonware.com  Sat Nov 11 17:16:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 23:16:23 +0100
Subject: explicit self revisited
In-Reply-To: <ej5fuv$a4a$1@online.de>
References: <ej5fuv$a4a$1@online.de>
Message-ID: <ej5i3k$6l3$1@sea.gmane.org>

Peter Maas wrote:

> What do you think?

cannot all you clueless trolls who cannot think of a single useful thing 
to contribute to Python start your own newsgroup?

</F>



From gagsl-py at yahoo.com.ar  Wed Nov  8 14:15:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 16:15:41 -0300
Subject: Cactching Stdout
In-Reply-To: <1162976981.747479.226680@m7g2000cwm.googlegroups.com>
References: <1162976981.747479.226680@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108153118.05a81150@yahoo.com.ar>

At Wednesday 8/11/2006 06:09, Massi wrote:

>Hi everyone! I'm writing a python script which uses a C-written dll. I
>call the functions in the dll using ctypes, but I don't know how to
>catch the output of the "printf" which the C functions use. In fact I
>don't even know if it is possible! I've heard something about PIPE and
>popen...is this what I need? How can I use them? It is very important
>for me that I could take the output in real-time.

Since you are calling a function the same process, popen&co won't help.
This is just an idea; printf is writting to STDOUT; you could replace 
STDOUT with the write end of a pipe, and read from the other end.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Mon Nov 13 04:52:20 2006
From: sjmachin at lexicon.net (John Machin)
Date: 13 Nov 2006 01:52:20 -0800
Subject: Jython compile errors ...
In-Reply-To: <1163410573.124074.127560@k70g2000cwa.googlegroups.com>
References: <1163406931.241442.243390@e3g2000cwe.googlegroups.com>
	<1163410573.124074.127560@k70g2000cwa.googlegroups.com>
Message-ID: <1163411540.429639.100250@i42g2000cwa.googlegroups.com>


Eric_Dexter at msn.com wrote:
> If you are looking for an example of jython there is one in embeded in
> csound blue.  available from the csounds.com website I believe.  I have
> used it under the new java framework.  I am not far enough along to
> know if you are missing brackets {} exc and () and one ; but you can
> try getting the python part to work under python 2.3
>
>
> https://sourceforge.net/project/showfiles.php?group_id=156455
>
> donkeyboy wrote:
> > All,
> >
> > I've tried the jythonc compiler to try and create an applet to see how
> > it works, but I get a number of Java compile errors that are way above
> > my knowledge. Does anyone know what any of the following means? I'm
> > using JDK 1.5.0_09, under Win XP SP2.
> >
> > Runnnig the file " jython FILENAME" works, so I don't know what's
> > happening. Any thoughts?
[snip]

I was about to nominate somebody else for the monthly Most Astonishing
Result of Misreading a Post award, but the above just blew it away :-)



From cemerick at snowtide.com  Wed Nov 15 14:33:33 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Wed, 15 Nov 2006 14:33:33 -0500
Subject: lxml/ElementTree and .tail
Message-ID: <963FC6E3-F9E2-402E-B8E7-1FB1C8B36295@snowtide.com>

I looked around for an ElementTree-specific mailing list, but found  
none -- my apologies if this is too broad a forum for this question.

I've been using the lxml variant of the ElementTree API, which I  
understand works in much the same way (with some significant  
additions).  In particular, it shares the use of a .tail attribute.   
I ran headlong into this aspect of the API while doing some DOM  
manipulations, and it's got me pretty confused.

Example:

 >>> from lxml import etree as ET
 >>> frag = ET.XML('<a>head<b>inside</b>tail</a>')
 >>> b = frag.xpath('//b')[0]
 >>> b
<Element b at 71cbe8>
 >>> b.text
'inside'
 >>> b.tail
'tail'
 >>> frag.remove(b)
 >>> ET.tostring(frag)
'<a>head</a>'

As you can see, the .tail text is removed as part of the <b> element  
-- but it IS NOT part of the <b> element.  I understand the use of  
the .tail attribute given the desire to simplify the API by avoiding  
pure text nodes, but it seems entirely inappropriate for the tail  
text to disappear into the ether when what is technically a sibling  
node is removed.

Performing the same operations with the Java DOM api (crimson, in  
this case it turns out) yields what I would expect (here I'm using  
JPype to access a v1.4.2 JVM through python -- which makes things  
somewhat less painful):

 >>> from jpype import *
 >>> startJVM(getDefaultJVMPath())
 >>> builder = javax.xml.parsers.DocumentBuilderFactory.newInstance 
().newDocumentBuilder()
 >>> xml = java.io.ByteArrayInputStream(java.lang.String 
('<a>head<b>inside</b>tail</a>').getBytes())
 >>> doc = builder.parse(xml)
 >>> a = doc.documentElement
 >>> a.toString()
u'<a>head<b>inside</b>tail</a>'
 >>> b = a.getElementsByTagName('b').item(0)
 >>> a.removeChild(b)
 >>> a.toString()
u'<a>headtail</a>'

(Sorry for the Java comparison, but that's where I first cut my teeth  
on XML, and that's where my expectations were formed.)

That's a pretty significant mismatch in functionality.  I certainly  
understand the motivations of Mr. Lundh to make the ET API as  
pythonic as possible, but ET's behaviour in this specific context is  
flatly wrong as far as I can see.  I would have expected that a  
removal operation would have appended <b>'s tail text to the text of  
<a> (or perhaps to the tail text of <b>'s closest preceding sibling)  
-- something that I think I'm going to have to do in order to  
continue using lxml / ElementTree.

I ran this issue past a few people I know who've worked with and  
written about ElementTree, and their response to this apparent  
divergence between the ET DOM API and "standard" DOM APIs was  
roughly: "that's just the way it is".

Comments, thoughts?

Chas Emerick
Founder, Snowtide Informatics Systems
Enterprise-class PDF content extraction

cemerick at snowtide.com
http://snowtide.com | +1 413.519.6365




From rrr at ronadam.com  Sun Nov 12 01:23:20 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 12 Nov 2006 00:23:20 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <17750.22816.636590.485360@montanaro.dyndns.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>	<mailman.2105.1163279202.11739.python-list@python.org>	<ej5e69$j1q$1@news.albasani.net>
	<ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
Message-ID: <ej6erq$vkh$1@sea.gmane.org>

skip at pobox.com wrote:
>     >>>>> I'm not sure why '\'s are required to do multi-line before the colon.
>     >>>> Special cases aren't special enough to break the rules.
>     >>>> 
>     >>>> Georg
>     >>> A bit of a circular answer.
>     >>> 
>     >>> Why the rule? -> So not to break the rule?
>     >> 
>     >> You proposed to allow leaving off line continuation '\' only in the
>     >> "if", "for" and "while" headers. This is a special case in my eyes.
> 
>     Ron> I wasn't that specific and it was related to Michael's suggestion
>     Ron> the colon wasn't needed. If the need for '\' was dropped in
>     Ron> multi-line block headers, then the colon would be required for an
>     Ron> obvious reason.
> 
> But \ is used to continue all sorts of statements/expressions, e.g.:
> 
>     x = a + \
>           b
> 
> not just conditionals.
> 
> Skip

Of course, and your point is?

How about if it be ok to continue to use '\' in headers, but it also be ok to 
not to?  That would be the backward compatible way to change it.

This doesn't answer the question I was asking, are there any situation where it 
would cause problems?  And if so, that reason would be a good and explicit 
reason for not making such a change.

Ron




From Roberto.Bonvallet at cern.ch  Thu Nov 30 10:09:43 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 30 Nov 2006 15:09:43 +0000 (UTC)
Subject: PythonTidy
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
	<mailman.882.1164897465.32031.python-list@python.org>
Message-ID: <ekms7n$78a$1@cernne03.cern.ch>

Chuck Rhode wrote:
[...]
> Thanks, too, for trying *PythonTidy*.

No, thanks you for writing such a tool!

> [...] nevertheless, most [options] are declared near the beginning where
> they sit just begging for end-user involvement.  See: CODING_SPEC and
> SHEBANG.

The fact that I immediately noticed them and came up with an example to
raise both issues is a indicator of how easy it would be to customize the
script :)

Cheers!
-- 
Roberto Bonvallet


From skip at pobox.com  Tue Nov  7 15:28:00 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 7 Nov 2006 14:28:00 -0600
Subject: Tired of spam, unrelated email?
In-Reply-To: <000601c7029a$7b0a7310$6400a8c0@genesis>
References: <000601c7029a$7b0a7310$6400a8c0@genesis>
Message-ID: <17744.60496.665376.34698@montanaro.dyndns.org>


    Tired of spam, unrelated email?

You mean, like your message?

Skip


From bignose+hates-spam at benfinney.id.au  Thu Nov 23 20:00:06 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 24 Nov 2006 12:00:06 +1100
Subject: Text markup conventions (was: sys.stderr.write and sys.exit)
References: <1164278785.075748.220690@j44g2000cwa.googlegroups.com>
	<mailman.657.1164321569.32031.python-list@python.org>
	<INq9h.2470$sf5.237@newsread4.news.pas.earthlink.net>
Message-ID: <874pspveuh.fsf_-_@benfinney.id.au>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> Ben Finney wrote:
> > (Note: The underscore '_' is a valid character in Python code, so
> > I was quite confused by what you wrote and had to read it several
> > times to see that you were intending the underscores not to be
> > part of the code. Better to show a line of code on its own line in
> > your message.)
>
> Old "rich text" email format effectors... *word* => bolded, /word/
> => italic, _word_ => underscored.

Yes, I use those (or similar) myself, but only in natural language
where the context makes it clear that the punctuation characters are
not intended to be part of the content. When showing program code,
it's a poor choice to use punctuation characters for such markup,
since it's not clear which ones are part of the code.

-- 
 \          "It's a good thing we have gravity or else when birds died |
  `\             they'd just stay right up there. Hunters would be all |
_o__)                                     confused."  -- Steven Wright |
Ben Finney



From tundra at tundraware.com  Wed Nov  8 14:48:00 2006
From: tundra at tundraware.com (Tim Daneliuk)
Date: Wed, 08 Nov 2006 13:48:00 -0600
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
Message-ID: <dso924-t7r.ln1@eskimo.tundraware.com>

cdroulers at hotmail.com wrote:
> Hello,
> I am working on a school project that requires me to get the path of a
> filename for future treatment.
> I've tried getting a file with tkFileDialog.askopenfile.
> 
> 
> ********************************************
> import tkFileDialog
> file = tkFileDialog.askopenfile()
> print file
> ********************************************
> 
> 
> It prints the opened files stuff, but I just can not find how to get
> that path as a string. I've searched around google and the present
> group, and found no documentation on the file class used with
> tkFileDialog. Does someone have a solution for that?
> 
> Thank you
> 
> Christian
> 

How about:

print file.name



-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From anthra.norell at vtxmail.ch  Mon Nov  6 04:22:31 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Mon, 06 Nov 2006 10:22:31 +0100
Subject: string to list of numbers conversion
In-Reply-To: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <454EFED7.6000207@vtxmail.ch>

jm.suresh at no.spam.gmail.com wrote:
> Hi,
>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>   Is there any alternative way?
>
> Thanks.
> Suresh
>
>   
s = '((1,2), (3,4))'
separators = re.compile ('\(\s*\(|\)\s*,\s*\(|\)\s*\)')
tuple ([(float (n[0]), float (n[1])) for n in [pair.split (',') for pair 
in separators.split (s) if pair]])
((1.0, 2.0), (3.0, 4.0))

Frederic




From bmichel at gmail.com  Wed Nov 22 08:31:03 2006
From: bmichel at gmail.com (bmichel at gmail.com)
Date: 22 Nov 2006 05:31:03 -0800
Subject: XML Validation in Python using XSV
In-Reply-To: <45644E9A.3030209@web.de>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
	<45644E9A.3030209@web.de>
Message-ID: <1164202262.974495.289490@f16g2000cwb.googlegroups.com>

No particular reason for XSV
I just want to validate XML files against an XML schema through Python.
If you can suggest any other package for debian, I'll be glad to try
it.

Michel

Stefan Behnel wrote:
> bmichel at gmail.com wrote:
> > I'd like to use XSV for validating an XML file in Python.
> > I am working on Linux Debian platform.
> > I'm not sure how to install XSV and how to configure it. My goal is to
> > be able to import the XSV library in Python and be able to use it's
> > functions.
>
> You can use "dpkg" to install the .deb. Read "man dpkg".
>
> BTW: any reason you need to use XSV? There are some other libraries out there
> that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
> much more powerful than XSV.
> 
> Stefan



From no-spam at no-spam-no-spam.invalid  Mon Nov  6 06:58:26 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 06 Nov 2006 12:58:26 +0100
Subject: Erronous "unsupported locale setting" ?
Message-ID: <ein814$ml1$1@news.albasani.net>

Why can the default locale not be set by its true name? but only by '' ? :


PythonWin 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32.
>>> import locale
>>> locale.getlocale()
(None, None)
>>> locale.setlocale(locale.LC_ALL,"de_DE")
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python25\lib\locale.py", line 476, in setlocale
    return _setlocale(category, locale)
Error: unsupported locale setting
>>> locale.getdefaultlocale()
('de_DE', 'cp1252')
>>> locale.setlocale(locale.LC_ALL,locale.getdefaultlocale())
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python25\lib\locale.py", line 476, in setlocale
    return _setlocale(category, locale)
Error: unsupported locale setting
>>> locale.setlocale(locale.LC_ALL)
'C'
>>> locale.setlocale(locale.LC_ALL,'')
'German_Germany.1252'
>>> locale.getlocale()
('de_DE', 'cp1252')
>>> 


From fakeaddress at nowhere.org  Mon Nov 27 07:35:10 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 27 Nov 2006 12:35:10 GMT
Subject: working with files and directories
In-Reply-To: <7IAah.58105$uv5.416763@twister1.libero.it>
References: <7IAah.58105$uv5.416763@twister1.libero.it>
Message-ID: <2YAah.18835$Sw1.13785@newssvr13.news.prodigy.com>

halex2000 wrote:
> Hi all, I'm new with Python, and I thought to use it to automatically rename 
> some files in a directory, but I don't know where should I search the 
> functions: to get all the files of a directory, to rename the files and so 
> on.

Python programmers are constantly looking at:

     http://docs.python.org/lib/lib.html

In this case, see 14.1.4, 11.1, and 11.10.

Happy hacking.

-- 
--Bryan



From maxerickson at gmail.com  Mon Nov  6 10:35:22 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 6 Nov 2006 15:35:22 +0000 (UTC)
Subject: how do I pass values between classes?
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
	<454C9ECF.5020806@websafe.com>
	<1162796443.570347.91760@e3g2000cwe.googlegroups.com>
Message-ID: <Xns98736BB389B75maxericksongmailcom@80.91.229.5>

"kath" <nitte.sudhir at gmail.com> wrote:

> hi, Larry Bates .... thanks for the reply...
> 
>> You might consider doing it the same way wx passes things around.
>> When you instantiate the subclass pass the parent class' instance
>> as first argument to __init__ method.
> 
> Yes thats absolutely right..
> 
>> That way the subclass can
>> easily pass values back to the parent by using that pointer.
> 
> Could you please explain me this.. more clearly. I think it is much
> close to the solution.
> 
> 
> Thank you.
> regards, sudhir
> 

Somewhere in the child class:

self.parent.do_something(something_to_do_it_with)



From bobjohnson11 at gmail.com  Sat Nov  4 09:43:19 2006
From: bobjohnson11 at gmail.com (RobJ)
Date: 4 Nov 2006 06:43:19 -0800
Subject: PySchool - Online Python Web Framework Workshop.
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
	<agZ2h.4143$9v5.1633@newssvr29.news.prodigy.net>
Message-ID: <1162651399.648891.31580@i42g2000cwa.googlegroups.com>


Thanks James and Steve for the feedback I have made the appropriate
changes and republished the survey at the following URL:

http://killersurvey.com/answer_survey.php?id=490

Rob J



James Stroud wrote:
> RobJ wrote:
> > Hi! My Name is Rob Johnson and I am a graduate student at The Richard
> > Stockton College of NJ. To make a long story short, I'm working on my
> > Masters project in the MAIT program (Masters of Arts in Instructional
> > Technology). I have written a proposal to put together a free on-line
> > Python web framework workshop. The workshop will be geared to help
> > people new to Python web frameworks. I am asking for the community's
> > assistance to help me get this project off the ground. As part of my
> > project, I am conducting a survey for people who are interested in
> > learning more about python web frameworks.  The survey is located at
> > http://killersurvey.com/answer_survey.php?id=479. I have also started a
> > blog about this experience in order to let people know what I'm doing
> > (http://pyschool.blogspot.com/). If you have a few minutes, please take
> > a couple of minutes to take the quick survey. The survey is anonymous
> > and the information will be used for statistics for my project. Also,
> > any constructive feedback or suggestions that you can give me would be
> > gladly appreciated.
> >
> > Thanks
> >
> > Rob J
> >
> Q9 should be "check all that apply" or otherwise qualified with "primarily".
>
> Q10 is missing other types of broadband such as what one might find at
> school, and also have the option of multiple selections.



From kelong_2000 at yahoo.com  Wed Nov  8 10:11:34 2006
From: kelong_2000 at yahoo.com (Kenneth Long)
Date: Wed, 8 Nov 2006 07:11:34 -0800 (PST)
Subject: ANN: wxPython 2.7.2.0
In-Reply-To: <45518E52.4010306@alldunn.com>
Message-ID: <20061108151134.73765.qmail@web51113.mail.yahoo.com>

Is there a new version of Demo Docs released also?

I get this error from Sourceforge after clicking on
the  link at wxPython page.

Could not read file.

Go back.
/home/ftp/pub/sourceforge//w/wx/wxpython/wxPython2.7-win32-docs-demos-2.7.2.0.exe
Nov 08, 2006 07:10


--- Robin Dunn <robin at alldunn.com> wrote:

> Announcing
> ----------
> 
> The 2.7.2.0 release of wxPython is now available for
> download at
> http://wxpython.org/download.php.  This is expected
> to be the last
> stepping stone in the path to the next stable
> release series,
> 2.8.x. We're pushing full speed ahead in order to
> get 2.8.0 included
> with OSX 10.5, and so far we are very close to being
> on schedule. This
> release has some house-keeping style changes, as
> well as some
> user-contributed patches and also the usual crop of
> bug fixes.  Source
> and binaries are available for both Python 2.4 and
> 2.5 for Windows and
> Mac, as well some pacakges for varous Linux
> distributions.  A summary
> of changes is listed below and also at
> http://wxpython.org/recentchanges.php.
> 
> 
> What is wxPython?
> -----------------
> 
> wxPython is a GUI toolkit for the Python programming
> language. It
> allows Python programmers to create programs with a
> robust, highly
> functional graphical user interface, simply and
> easily. It is
> implemented as a Python extension module that wraps
> the GUI components
> of the popular wxWidgets cross platform library,
> which is written in
> C++.
> 
> wxPython is a cross-platform toolkit. This means
> that the same program
> will usually run on multiple platforms without
> modifications.
> Currently supported platforms are 32-bit Microsoft
> Windows, most Linux
> or other Unix-like systems using GTK2, and Mac OS X
> 10.3+, in most
> cases the native widgets are used on each platform.
> 
> 
> Changes in 2.7.2.0
> ------------------
> 
> Patch [ 1583183 ] Fixes printing/print preview
> inconsistencies
> 
> Add events API to wxHtmlWindow (patch #1504493 by
> Francesco Montorsi)
> 
> Added wxTB_RIGHT style for right-aligned toolbars
> (Igor Korot)
> 
> Added New Zealand NZST and NZDT timezone support to
> wx.DateTime.
> 
> wx.Window.GetAdjustedBestSize is deprecated.  In
> every conceivable
> scenario GetEffectiveMinSize is probably what you
> want to use instead.
> 
> wx.Image: Gained support for TGA image file format.
> 
> wx.aui: The classes in the wx.aui module have been
> renamed to be more
> consistent with each other, and make it easier to
> recognize in the
> docs and etc. that they belong together.
> 
>      FrameManager -->       AuiManager
>      FrameManagerEvent -->  AuiManagerEvent
>      PaneInfo -->           AuiPaneInfo
>      FloatingPane -->       AuiFloatingPane
>      DockArt -->            AuiDockArt
>      TabArt -->             AuiTabArt
>      AuiMultiNotebook -->   AuiNotebook
>      AuiNotebookEvent -->   AuiNotebookEvent
> 
> wx.lib.customtreectrl: A patch from Frame Niessink
> which adds an
> additional style (TR_AUTO_CHECK_PARENT) that
> (un)checks a parent when
> all children are (un)checked.
> 
> wx.animate.AnimationCtrl fixed to display inactive
> bitmap at start
> (patch 1590192)
> 
> Patch from Dj Gilcrease adding the
> FNB_HIDE_ON_SINGLE_TAB style flag
> for wx.lib.flatnotebook.
> 
> wx.Window.GetBestFittingSize has been renamed to
> GetEffectiveMinSize.
> SetBestFittingSize has been renamed to
> SetInitialSize, since it is
> most often used only to set the initial (and
> minimal) size of a
> widget.
> 
> The QuickTime backend for wx.media.MediaCtrl on MS
> Windows works
> again.  Just pass
> szBackend=wx.media.MEDIABACKEND_QUICKTIME to the
> constructor to use it instead of the default
> ActiveMovie backend,
> (assuming the quicktime DLLs are available on the
> system.)
> 
> -- 
> Robin Dunn
> Software Craftsman
> http://wxPython.org  Java give you jitters?  Relax
> with wxPython!
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


hello



 
____________________________________________________________________________________
Sponsored Link

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From rtw at freenet.co.uk  Wed Nov  1 15:55:16 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 14:55:16 -0600
Subject: Where do nested functions live?
References: <4548DDFC.9020409@vtxmail.ch>
	<mailman.1615.1162411287.11739.python-list@python.org>
Message-ID: <Xns986ED4EEF74EArtwfreenetREMOVEcouk@216.196.109.145>

Steve Holden wrote in
news:mailman.1615.1162411287.11739.python-list at python.org in
comp.lang.python: 

> Since we have a class that goes out of scope 
>> when the function returns, and we don't need more than one instance,
>> why bother to make an instance? Why not use the class object itself?
>> 
>> def whatever( new_ms ):
>> 
>>   class scope ( object ):
>> 
>>   def inner():
>>     scope.mseconds = new_ms - s * 1000       
>>     m, scope.seconds = divmod (s, 60)
>>     h, scope.minutes = divmod (m, 60)
>>     d, scope.hours = divmod (h, 24)
>>     scope.weeks, scope.days = divmod (d, 7)     
>> 
> That will need to be
> 
>    class scope(object): pass
> 
> to avoid syntax errors, I suspect. There doesn't seem to be any reason
> why you couldn't use a class instead of an instance. And, of course, 
> either might give you problems in the case of a recursive inner
> function. 

What problems would it have that a recursive global function 
that modified a global object, or a recursive method that 
modified its instance doesn't have ?

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From __peter__ at web.de  Fri Nov  3 04:14:55 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 03 Nov 2006 10:14:55 +0100
Subject: __doc__ in compiled script
References: <mailman.1686.1162499924.11739.python-list@python.org>
Message-ID: <eif1a8$cil$02$1@news.t-online.com>

Gabriel Genellina wrote:

> I have a script starting with a docstring. After compiling it with
> compile(), is there any way I could get the docstring? __doc__ on the
> code object doesn't work.


The lazy coder's approach:

>>> compiler.parse("""
... 'the docstring'
... print 42
... """).doc
'the docstring'

Peter


From sjmachin at lexicon.net  Fri Nov 10 15:16:05 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Nov 2006 12:16:05 -0800
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <1163179622.691812.96170@h48g2000cwc.googlegroups.com>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>
	<1163178581.231837.18120@h48g2000cwc.googlegroups.com>
	<ej2ce8$vsc$1@cernne03.cern.ch>
	<1163179622.691812.96170@h48g2000cwc.googlegroups.com>
Message-ID: <1163189765.282387.287880@h54g2000cwb.googlegroups.com>


ronrsr wrote:
> the exact code that is triggering the error message is:
>
> zc = zsql.connect()

Don't give us one line; give us the whole of the imported module plus
the calling script (at least up to the place where it gets the error).
That way we can see what is really going on, and someone with mysqldb
installed could try to reproduce your problem.

>
> exact error message:  SyntaxError:  Invalid Syntax

Inexact! The message would have been
SyntaxError: invalid syntax

Please *DON'T* type in what you think you remember you think you saw on
the screen; *COPY/PASTE* the traceback and the error message.

>
>
> but any statement that follows the import statement will trigger it.
>
> bests,
>
> r-sr-
>
>
>
>
> Roberto Bonvallet wrote:
> > ronrsr wrote:
> > > thanks for the speedy answer.  what i meant was:
> > >
>
> > Could you please copy and paste the exact code that is triggering the
> > error, and the exact error message?
> >
> > (BTW, in Python you don't need to end your statements with a semi-colon)
> > --



From jrpfinch at gmail.com  Fri Nov 24 06:31:52 2006
From: jrpfinch at gmail.com (jrpfinch)
Date: 24 Nov 2006 03:31:52 -0800
Subject: Simple threading
In-Reply-To: <l%n9h.2616$ql2.351@newsread3.news.pas.earthlink.net>
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
	<l%n9h.2616$ql2.351@newsread3.news.pas.earthlink.net>
Message-ID: <1164367912.345480.35420@m7g2000cwm.googlegroups.com>

Thank you for your help - the application is proceeding well.



From aisaac at american.edu  Wed Nov 29 11:52:07 2006
From: aisaac at american.edu (Alan Isaac)
Date: Wed, 29 Nov 2006 11:52:07 -0500
Subject: How to refer to Python?
References: <9e2f512b0611281348q566dd475xd2f18cf7999180a4@mail.gmail.com>
	<mailman.815.1164750798.32031.python-list@python.org>
Message-ID: <op.tjseg5goui531b@supernews.american.edu>

On Tue, 28 Nov 2006 16:51:10 -0500, Fredrik Lundh <fredrik at pythonware.com>  
wrote:
> http://effbot.org/pyfaq/are-there-any-published-articles-about-python-that-i-can-reference.htm

Maybe:
<URI:http://www.amazon.com/Introduction-Python-Guido-Van-Rossum/dp/0954161769/sr=8-1/qid=1164818994/ref=sr_1_1/102-2818366-5466542?ie=UTF8&s=books>

Alan Isaac


From antroy at gmail.com  Wed Nov 22 03:26:49 2006
From: antroy at gmail.com (Ant)
Date: 22 Nov 2006 00:26:49 -0800
Subject: re.match -- not greedy?
References: <mailman.476.1163979600.32031.python-list@python.org>
Message-ID: <1164184009.099556.205690@m73g2000cwd.googlegroups.com>


EXI-Andrews, Jack wrote:

> the '*' and '+' don't seem to be greedy.. they will consume less in
> order to match a string:
>
> >>> import re;re.match('(a+)(ab)','aaab').groups()
> ('aa', 'ab')
>
> this is the sort of behaviour i'd expect from
>    '(a+?)(ab)'
>
> a+ should greedily consume a's at the expense of the string not matching

They are greedy - they consume as much as possible *without*
sacrificing the match.

You are thinking I think of possessive quantifiers, such as found in
Java, which *will* match as much as possible even if doing so causes
the match to fail. This would be written:

re.match('(a++)(ab)','aaab')

Python doesn't support these possessive quantifiers.



From gagsl-py at yahoo.com.ar  Tue Nov 14 21:10:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 14 Nov 2006 23:10:36 -0300
Subject: jython's future
In-Reply-To: <12lkpd83jpjol3f@corp.supernews.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>
	<4rrjenFspqicU2@mid.uni-berlin.de> <4558ACAC.1030001@web.de>
	<1163440390.3434.45.camel@dot.uniqsys.com>
	<ejac9n$21u$1@sea.gmane.org>
	<mailman.80.1163442992.32031.python-list@python.org>
	<12lkpd83jpjol3f@corp.supernews.com>
Message-ID: <7.0.1.0.0.20061114224426.01ecae80@yahoo.com.ar>

At Tuesday 14/11/2006 21:56, Ed Jensen wrote:


>??ukasz Langa <lukasz.langa at gmail.com> wrote:
> > Java was at 1.2 (and compiling Hello World took over 5 minutes)
>
>Bullshit.  Complete and utter bullshit.

That's the plain truth. Python 1.5.2 final release is of 13 April 
1999 <http://www.python.org/download/releases/1.5/>
JDK 1.2.2 came Friday, July 9, 1999 <http://www.cafeaulait.org/1999july.html>

By the time, Oracle8 installer was a Java application, and required 
*several* minutes just to load and start running. That's an example 
of java "speed" at that time.

We used to call Java "Ya va!", which in spanish means something like 
"Wait, I'm coming!" :)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From http  Sat Nov  4 02:10:24 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 23:10:24 -0800
Subject: Javascript is turning into Python?!
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
	<1162596267.518634.164170@h54g2000cwb.googlegroups.com>
	<7xr6wkt6a3.fsf@ruckus.brouhaha.com>
	<mailman.1748.1162612506.11739.python-list@python.org>
Message-ID: <7x7iybadr3.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:

> Wouldn't that be
> 
>      with f() as x, g() as y:
>          blah(x, y)

Probably.  I haven't started using 2.5 yet.


From fredrik at pythonware.com  Wed Nov  1 15:47:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 21:47:18 +0100
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <eib0la$86i$1@newslocal.mitre.org>
References: <eib0la$86i$1@newslocal.mitre.org>
Message-ID: <eib14m$aib$2@sea.gmane.org>

Jeff Blaine wrote:

> It's been a year or so since I written Python code, so maybe
> I am just doing something really dumb, but...
> 
> Documentation
> =============
> 
> 	class DictReader(csvfile[,fieldnames=None,
>               [,restkey=None[, restval=None[, dialect='excel'
>               [, *args, **kwds]]]]])
> 
> 
> 	Create an object which operates like a regular reader
> 	but maps the information read into a dict whose keys
> 	are given by the optional fieldnames parameter. If the
> 	fieldnames parameter is omitted, the values in the
> 	first row of the csvfile will be used as the fieldnames.
> 
> Code
> ====
> 
> 	import csv
> 
> 	r = csv.DictReader('C:\Temp\Book1.csv')
> 	print r.next()
> 	# EOF

here's the documentation for the regular reader, from Python 2.5:

     reader(...)
         csv_reader = reader(iterable [, dialect='excel']
                                 [optional keyword args])
             for row in csv_reader:
                 process(row)

         The "iterable" argument can be any object that returns a line
         of input for each iteration, such as a file object or a list.
         ...

so the reader is simply looping over the characters in your filename.  try

     r = csv.DictReader(open('C:\Temp\Book1.csv'))

instead.

</F>



From no-spam at no-spam-no-spam.invalid  Fri Nov  3 12:39:13 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 18:39:13 +0100
Subject: Is there a way to define a true global across modules?
In-Reply-To: <mailman.1718.1162569941.11739.python-list@python.org>
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik>
	<mailman.1718.1162569941.11739.python-list@python.org>
Message-ID: <eifus3$b9o$1@news.albasani.net>

Fredrik Lundh wrote:
> Hendrik van Rooyen wrote:
> 
>> I am struggling with this - I want to define a "system-wide" flag for 
>> use as a
>> semaphore.
> 
> http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm 
> 

Or worse style - if you are too lazy to create a extra global variables module (ab)use the __main__ module als "global":


import __main__

__main__.mysemphore += 1



-robert


From amk at amk.ca  Tue Nov  7 10:02:05 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Tue, 07 Nov 2006 09:02:05 -0600
Subject: Barry Warsaw giving Python talk at NASA
Message-ID: <_O6dnUlIw7lwAs3YnZ2dnUVZ_q-dnZ2d@speakeasy.net>

This is at the Goddard campus:
<http://isandtcolloq.gsfc.nasa.gov/fall2006/speaker/warsaw.html>

--amk


From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 19 09:02:11 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 20 Nov 2006 01:02:11 +1100
Subject: tempfile.NamedTemporaryFile wont work
References: <456049ca$0$4692$426a74cc@news.free.fr>
	<4sb0cvFurjq2U1@mid.individual.net>
Message-ID: <pan.2006.11.19.14.02.10.804394@REMOVE.THIS.cybersource.com.au>

On Sun, 19 Nov 2006 13:18:39 +0100, Bjoern Schliessmann wrote:

> Imbaud Pierre wrote:
> 
>>              tf = tempfile.NamedTemporaryFile()
>>              tfName = tf.name
>> [...]
>>              print >> sys.stderr, '%s: %s' % (tfName, ['no',
>> 'yes'][os.path.exists(tfName)])
>>              subprocess.Popen(['strings', tfName])
> 
> Just out of curiosity: Why did you assign tf.name to tfname?
> 
> Hypothetically, if tf.name changed, tfname wouldn't follow since
> strings are immutable.

Well, yes, but if tf.name changed, that won't change the file name on disk
either:

>>> tf = tempfile.NamedTemporaryFile()
>>> tf.name
'/tmp/tmpYVV1Ij'
>>> os.path.exists(tf.name)
True
>>> oldname = tf.name
>>> tf.name = "/tmp/something"
>>> os.path.exists(tf.name)
False
>>> os.path.exists(oldname)
True


I'm guessing that binding tf.name to tfName is a micro-optimization. In a
very tight loop, name lookups can take considerable time, and one
optimization can be to reduce the number of lookups:

method = something.method
while 1:
    something.method # needs at least two lookups
    method # needs a single lookup


-- 
Steve.



From deets at nospam.web.de  Sun Nov  5 10:41:22 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Nov 2006 16:41:22 +0100
Subject: forwarding *arg parameter
In-Reply-To: <6pn3h.125$7b6.98@read3.inet.fi>
References: <6pn3h.125$7b6.98@read3.inet.fi>
Message-ID: <4r6f10Fq3lvfU1@uni-berlin.de>

Tuomas schrieb:
>  >>> def g(*arg):
> ...     return arg
> ...
>  >>> g('foo', 'bar')
> ('foo', 'bar')
>  >>> # seems reasonable
> ...
>  >>> g(g('foo', 'bar'))
> (('foo', 'bar'),)
>  >>> # not so good, what g should return to get rid of the outer tuple

g(*g('foo', 'bar'))


* and **  are the symetric - they capture ellipsis arguments, and they 
make iterables/dicts passed as positional/named arguments.

Diez


From fredrik at pythonware.com  Wed Nov  1 05:58:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 11:58:02 +0100
Subject: Make all files extension lower by a given directory name
In-Reply-To: <20061101103519.23154.qmail@web15015.mail.cnb.yahoo.com>
References: <20061101103519.23154.qmail@web15015.mail.cnb.yahoo.com>
Message-ID: <ei9ujp$6ct$1@sea.gmane.org>

Tiefeng Wu wrote:

> I need make all files extension to lower by a given directory.
> Here is my solution:
> 
> import os
> 
> def make_all_file_ext_lower(root):
>     for path, subdirs, files in os.walk(root):
>         for file in files:
>             (name, ext) = os.path.splitext(file)

the parens around the target variables are not necessary.

>             fullname = name[:len(name) - 1] + ext.lower()

are you sure you want to strip off the last character in the actual 
filename?  should "FOO.BAR" really be turned into "FO.bar" ?

name[:len(name) - 1] can be written name[:-1], btw.

>             os.rename(os.path.join(path, file), os.path.join(path, fullname))
> 
> I know this code is lame

except for the potential bug, and possibly the lack of error handling 
for the os.rename call, I'm not sure why you think that.

</F>



From george.sakkis at gmail.com  Tue Nov  7 21:42:47 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Nov 2006 18:42:47 -0800
Subject: object data member dumper?
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
	<4550fbfc$0$12098$88260bb3@free.teranews.com>
Message-ID: <1162953767.343243.258420@h54g2000cwb.googlegroups.com>

tom arnall wrote:

> Bruno Desthuilliers wrote:
>
> > tom arnall a ?crit :
> >> does anyone know of a utility to do a recursive dump of object data
> >> members?
> >>
> >
> > What are "object data members" ? (hint: in Python, everything is an
> > object - even functions and methods).
> >
> > What is your real use case ?
>
> something like:
>
>    class A:
>       def __init__(self, p1):
>          self.p1 = p1
>
>    class B:
>       def __init__(self,p1, p2):
>          self.a = A(p1)
>          self.p2 = p2
>          self.v1 = '3'
>
>    class C:
>       def __init__(self):
>          self.b = B(3,4)
>          self.p3 = 5
>
>    class D:
>       def __init__(self):
>          self.v2=2
>          self.o1 = C()
>          self.o2 = B(11,12)
>
>
>    d = D()
>    objectDataDumper(d)
>
>
> would produce something like:
>
>    object of class D with:
>    o1(C)->b(B)->a(A)->p1=3
>    o1(C)->b(B)->p2=4
>    o1(C)->b(B)->v1=3
>    o1(C)->p3=5
>    o2(B)->a(A)->p1=11
>    o2(B)->p2=12
>    o2(B)->v1=3
>    v2=2
>
>
> tom arnall
> north spit, ca
> usa

At first I thought pickle would be what you're looking for, because
that's exactly what it does; it dumps arbitrary objects, without
choking on recursive references. Only problem is, it's not human
readable (even in its ascii form).If you want it to be human readable,
you may check the gnosis.xml.pickle module
(http://cheeseshop.python.org/pypi/Gnosis_Utils/1.2.1-a). That's the
output of gnosis.xml.pickle.XML_Pickler(d).dumps() on your example:

<?xml version="1.0"?>
<!DOCTYPE PyObject SYSTEM "PyObjects.dtd">
<PyObject module="__main__" class="D" id="-1210610740">
<attr name="v2" type="numeric" value="2" />
<attr name="o2" type="PyObject" id="-1211043316" module="__main__"
class="B">
  <attr name="a" type="PyObject" id="-1211043220" module="__main__"
class="A">
    <attr name="p1" type="numeric" value="11" />
  </attr>
  <attr name="p2" type="numeric" value="12" />
  <attr name="v1" type="string" value="3" />
</attr>
<attr name="o1" type="PyObject" id="-1211199412" module="__main__"
class="C">
  <attr name="p3" type="numeric" value="5" />
  <attr name="b" type="PyObject" id="-1211082644" module="__main__"
class="B">
    <attr name="a" type="PyObject" id="-1211067156" module="__main__"
class="A">
     <attr name="p1" type="numeric" value="3" />
    </attr>
    <attr name="p2" type="numeric" value="4" />
    <attr name="v1" type="string" value="3" />
  </attr>
</attr>
</PyObject>


I've also written a similar but less verbose xml dumper. The gnosis.xml
package provides a bidirectional mapping between objects and xml
(objects -> xml and xml->object) and therefore has to be precise; mine
simply generates a nice xml dump of the object which isn't necessarily
reversible. Here's the output for your example:

<root type="__main__.D">
  <o1 type="__main__.C">
    <b type="__main__.B">
      <a type="__main__.A">
	<p1 type="int">3</p1>
      </a>
      <p2 type="int">4</p2>
      <v1 type="str">3</v1>
    </b>
    <p3 type="int">5</p3>
  </o1>
  <o2 type="__main__.B">
    <a type="__main__.A">
      <p1 type="int">11</p1>
    </a>
    <p2 type="int">12</p2>
    <v1 type="str">3</v1>
  </o2>
  <v2 type="int">2</v2>
</root>


If you find it suits you better, I'll try to make it available
somewhere (probably in the cookbook).

George



From mensanator at aol.com  Wed Nov 22 19:10:49 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 22 Nov 2006 16:10:49 -0800
Subject: Abelson and Python
In-Reply-To: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
Message-ID: <1164240649.628193.65300@f16g2000cwb.googlegroups.com>


bearophileHUGS at lycos.com wrote:
> While studying the SICP video lectures I have to twist my mind some to
> completely understand the lessons. I implement the programs shown there
> in both Python and Scheme, and I find the Python implementations
> simpler to write (but it's not a fair comparison because I know very
> little Scheme still).
>
> Now some things are changing:
> http://lambda-the-ultimate.org/node/1840
>
> >The MIT is going to change its curriculum structure that was famous for teaching Scheme in introductory courses. One force behind the reform is no one else than Harold Abelson, famous for his marvelous Scheme opus SICP.<
> >The first four weeks of C1 will be a lot like the first four weeks of 6.001, Abelson said. The difference is that programming will be done in Python and not Scheme.<
>
>
> Someone is translating the SIPC programs in Python too:
> http://www.codepoetics.com/wiki/index.php?title=Topics:SICP_in_other_languages#Python
>
> With slides and code from lectures:
> http://courses.csail.mit.edu/6.01/
> http://courses.csail.mit.edu/6.01/fall06/calendar.html
>
> I like Scheme a bit too, but I consider this is a small victory for
> Python :-)

No surprise to anyone who's ever tried to use MIT Scheme.

> 
> Bye,
> bearophile



From xi at gamma.dn.ua  Sat Nov 18 16:37:43 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 23:37:43 +0200
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <200611190249.43660.glebus@asd.iao.ru>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<200611190249.43660.glebus@asd.iao.ru>
Message-ID: <20061118213743.GA15906@58sirius016.dc.ukrtel.net>


On Sun, Nov 19, 2006 at 02:49:43AM +0600, Gleb Kulikov wrote:
> ? ????????? ?? ??????????? 19 ?????? 2006 01:01 Kirill Simonov ???????:
> 
> > first programming language to high school students?  It is necessary
>
> > Unfortunately, most IDEs I tried failed miserably in this respect.  My
>
> > For the record, I've checked IDLE, PythonWin, Eric, DrPython, SPE, and
> 
> Pardon, eric (eric-3.9.0-alt1 is in use), "speak" Russian quite well.
> We are trying to teach schoolers with a Python in an advanced elementary 
> school (9th - 11th). Yes, there is a problem with Cyrillic in eric's built-in 
> interpreter window (KOI8 locale is used) and *only* in the built-in 
> interpreter window, but there is short workaround for it: if avoid "# -*- 
> coding..." declaration, Cyrillic is painted well.

Hmm... Perhaps, you are right.  I remember quite well seeing
UnicodeDecodeError in eric, but now I couldn't reproduce it.
Still it would be good if eric could automatically add the BOM mark to
files containing non-ASCII characters (for UTF-8). That way the
deprecation warning about PEP 263 would be avoided.

There is a bigger problem though: it is difficult (if possible) to
install it under Windows.


Thanks,
Kirill


From gagsl-py at yahoo.com.ar  Wed Nov  8 16:04:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 18:04:58 -0300
Subject: Strange re problem on OSX but Not Linux
In-Reply-To: <1163008904.817018.186000@h54g2000cwb.googlegroups.com>
References: <1163008904.817018.186000@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108175432.05a4b260@yahoo.com.ar>

At Wednesday 8/11/2006 15:01, Brian wrote:

>I have a very small script:
>
>import re
>
>text = open('eq.txt','r').read()
>regex = '[^A-Z][A-Z]{3}([a-z])[A-Z]{3}[^A-Z]'
>pattern = re.compile(regex)
>match = pattern.findall(text)
>
>print ''.join(match)
>
>-------------------------------------------------------------------------------
>Here is the error outside of Komodo:
>
>Traceback (most recent call last):
>   File "reg1.py", line 1, in <module>
>     import re
>   File
>"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/re.py",
>line 5, in <module>
>     #
>AttributeError: 'module' object has no attribute 'compile'
>------------------------------------------------------------------------------
>
>This is running 2.5 on my OSX box.  If I run it (again with 2.5) on my
>SUSE machine, I get no errors.
>
>I am sure that I have overlooked something trivial here - so please be
>gentle if it is on the stupid side of things.

Dont use regex as a name. Also, do you have any script called "re.py" 
hidding that library module? or regex.py?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From nick at craig-wood.com  Thu Nov  2 08:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 02 Nov 2006 07:30:03 -0600
Subject: __div__ not recognized automatically
References: <eicmj4$sak$1@gwdu112.gwdg.de>
Message-ID: <slrnekjqcl.c3f.nick@irishsea.home.craig-wood.com>

Anton81 <usenet1 at anton.e4ward.com> wrote:
>  class NumX:
>    ...
>    def __add__(self,other):
>      ...
>    def __div__(self,other):
>      if not isinstance(other,NumX): other=NumX(other)
>      ...
> 
>  Somewhere else I use
> 
>  a=(b+c)/2
> 
>  where all variables are of NumX Type. When I execute the program it
>  complains that it can't find an operator "/" for "instance" and "integer".
>  However if I use pdb the same command works when started on the prompt. Also
>  the manual execution
> 
>  a=(b+c).__div__(2)
> 
>  works. Any suggestions what goes wrong?

Post some code which actually demonstrates the problem.

Eg, change this code until it does demonstrate the problem

------------------------------------------------------------
class NumX(object):
    def __init__(self, value):
        self.value = long(value)

    def __add__(self,other):
        if not isinstance(other,NumX): other=NumX(other)
        return NumX(self.value + other.value)

    def __div__(self,other):
        if not isinstance(other,NumX): other=NumX(other)
        return NumX(self.value / other.value)

    def __str__(self):
        return "%s(%s)" % (self.__class__.__name__, self.value)

a = NumX(4)
b = NumX(2)

print a,b
print a+b
print (a+b)/2
------------------------------------------------------------

This prints

------------------------------------------------------------
NumX(4) NumX(2)
NumX(6)
NumX(3)
------------------------------------------------------------

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


From tjreedy at udel.edu  Wed Nov 29 23:47:25 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 29 Nov 2006 23:47:25 -0500
Subject: Why are slice indices the way they are in python?
References: <1164860915.349821.309920@14g2000cws.googlegroups.com>
Message-ID: <eklnor$n5o$1@sea.gmane.org>


"Steve Bergman" <steve at rueb.com> wrote in message 
news:1164860915.349821.309920 at 14g2000cws.googlegroups.com...
>A couple of off the wall questions.
>
> It seems to me that there is usually a solid *reason* for things in
> Python and I'm wondering about the rationale for the way slicing works

Yes, see below.

> my_string[2:5]
>
> gets you the 3rd through the 3rd through the 5th character of the
> string because indexing starts at 0 and you get everything up to, but
> not including the second index.
>
> Why?

len(s[2:5])== 5-2
s[2:5] + s[5:7] == s[2:7]


> Another thing that I've been puzzling over is the pow() function.
>
> pow(x,y) gives x**y.  Fine.
>
> But pow(x,y,z) gives (x**y) % c

you obvious meant (x**y) % z

>
> I'm curious to know what the pressing reason for such a feature was.

Such exponential remainders are used in cryptography work, for instance, 
with fairly large values, and can be efficiently computed, especially in C, 
*without* computing a humongous x**y intermediate value.

Since this is an int function, it does not really belong in the floating 
point math module.

Terry Jan Reedy





From tjreedy at udel.edu  Sun Nov  5 15:01:16 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 5 Nov 2006 15:01:16 -0500
Subject: Awesome Python Information
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
Message-ID: <eilfuc$9c$1@sea.gmane.org>


"Brandon" <Lion623 at mail.com> wrote in message 
news:1162753631.297470.315570 at m7g2000cwm.googlegroups.com...
> Check out: www.ChezBrandon.com

for awesome megalomania having nothing to do with Python. 





From bearophileHUGS at lycos.com  Wed Nov 22 18:51:57 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 15:51:57 -0800
Subject: Abelson and Python
Message-ID: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>

While studying the SICP video lectures I have to twist my mind some to
completely understand the lessons. I implement the programs shown there
in both Python and Scheme, and I find the Python implementations
simpler to write (but it's not a fair comparison because I know very
little Scheme still).

Now some things are changing:
http://lambda-the-ultimate.org/node/1840

>The MIT is going to change its curriculum structure that was famous for teaching Scheme in introductory courses. One force behind the reform is no one else than Harold Abelson, famous for his marvelous Scheme opus SICP.<
>The first four weeks of C1 will be a lot like the first four weeks of 6.001, Abelson said. The difference is that programming will be done in Python and not Scheme.<


Someone is translating the SIPC programs in Python too:
http://www.codepoetics.com/wiki/index.php?title=Topics:SICP_in_other_languages#Python

With slides and code from lectures:
http://courses.csail.mit.edu/6.01/
http://courses.csail.mit.edu/6.01/fall06/calendar.html

I like Scheme a bit too, but I consider this is a small victory for
Python :-)

Bye,
bearophile



From Jeff.Demel at JavelinDirect.com  Tue Nov 21 16:44:18 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Tue, 21 Nov 2006 15:44:18 -0600
Subject: Psycopg2 | collapse row to string
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734C001@DMSP-MSG-EVS01.mail.pvt>

resultfile.write(delimiter.join([str(elt) for elt in row]))

Worked like a charm.  Thanks, Skip.

-Jeff



-----Original Message-----
From: skip at pobox.com [mailto:skip at pobox.com] 
Sent: Tuesday, November 21, 2006 3:19 PM
To: Demel, Jeff
Cc: python-list at python.org
Subject: Re: Psycopg2 | collapse row to string


    Jeff> Is there an easy want to create a delimited string from this,
for
    Jeff> example:

    Jeff> for row in rows:
    Jeff>     if checksomething == 100:
    Jeff>         newline = row[].combine("delimiter of some kind")
    Jeff>         resultfile.write(newline)

By "delimited string" do you mean something that can handle fields in
which your delimiter appears?  If so, you should look at the csv.writer
class.  If you're absolutely certain your delimiter won't occur in your
output, you can just stringify the values and join them:

    delimiter = ","
    for row in rows:
        if checksomething == 100:
            resultfile.write(delimiter.join([str(elt) for elt in row]))

If you know all your row values are already strings it's even easier:

    delimiter = ","
    for row in rows:
        if checksomething == 100:
            resultfile.write(delimiter.join(row))

Skip
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From xi at gamma.dn.ua  Sat Nov 18 14:54:39 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 21:54:39 +0200
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <455F5D11.8030104@t0mb.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru> <455F5D11.8030104@t0mb.net>
Message-ID: <20061118195439.GA3393@58sirius016.dc.ukrtel.net>

On Sat, Nov 18, 2006 at 07:20:49PM +0000, tom wrote:
> Oleg Broytmann wrote:
> > On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
> >   
> >> Could anyone suggest me a simple IDE suitable for teaching Python as a
> >> first programming language to high school students
> >>     
> which operating system would this concern?  IDLE which you might find 

MS Windows is a must, but having Linux support would be nice too.

Unfortunately, IDLE does not work well with non-ASCII input/output.

> I personally use pida (http://pida.berlios.de).  It is perhaps not a 

Thanks for the suggestion, I'll check it.


Thanks,
Kirill


From sjmachin at lexicon.net  Thu Nov  2 15:55:10 2006
From: sjmachin at lexicon.net (John Machin)
Date: 2 Nov 2006 12:55:10 -0800
Subject: Converting a .dbf file to a CSV file
References: <mailman.1671.1162488795.11739.python-list@python.org>
Message-ID: <1162500910.631386.221620@h54g2000cwb.googlegroups.com>

Johanna Pfalz wrote:
> Is there a module/method in python to convert a file from .DBF format to
> .CSV format?
>
>

Hi Johanna, the best start at the moment is the Python Cookbook recipe
that others have quoted. Steps:

(1) Input: as per recipe. Note that the recipe handles only the
earliest simplest form of dbf files; you may have data types other than
C, N, D and L. Note that there are myriads of third-party dbf writing
codes out there, and some of them are a little idiosyncratic. I am in
the pre-alpha stage of producing a module whose intent is to read just
about everything it is given, with lots of assertions, error checks,
and warnings. This includes M (memo) fields which are stored in a
separate file in 1 of at least 3 formats. If your file causes the
recipe to crashes or produce incorrect results, there is a good chance
that I may be able to help you.
(2) [optional] derive output file headings from names of fields.
(3) Convert data values to str, if str(input_value) is not appropriate
(4) Write values to csv file. For this I strongly suggest that you use
the Python csv module, rather than attempting to reinvent the wheel
(and the often-forgotten axle). If, as I guess from your name, that you
want the delimiter to be ";" instead of ",", then that can be handled
easily with ..., delimiter=";" in the call to csv.writer.

HTH,
John



From ratchetgrid at googlemail.com  Sat Nov 25 18:34:11 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sat, 25 Nov 2006 23:34:11 +0000
Subject: Graph Data Structures
In-Reply-To: <1164495892.406863.10090@m7g2000cwm.googlegroups.com>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
	<1164495892.406863.10090@m7g2000cwm.googlegroups.com>
Message-ID: <676224240611251534s6fc57ddfje9b0ab3fc838861a@mail.gmail.com>

Hi,

The idea is that I m going to use it to build graphs for sequence
alignment (at the moment), I read a discussion on the corebio
(reimplementation of biopython) group about using intervals to
represent sequence slices. The idea being that, my graph may contain
millions of alignments and storing the sequence (the actual ATGC) is
not required.

class Node(object):
     pass

class Interval(Node):
    _id = "gene1"
     _start = 50
    _end = 200
    _strand = 1

class Sequence(object):
    _sequence = "atgtcgtgagagagagttgtgag................."

So one interval on one sequence would align to another interval from
another sequence, but I want changes I make to the interval to be
reflected in the representation later. If I reverse complement it i
want the interval to store this information but the Sequence only
shows this later on when I call use it calling repr or str.

Do you get what I mean.
Many Thanks

Nathan


From steve at holdenweb.com  Wed Nov  8 08:16:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 07:16:32 -0600
Subject: MODULE mx.DateTime
In-Reply-To: <20061108103133.46775.qmail@web58104.mail.re3.yahoo.com>
References: <20061108103133.46775.qmail@web58104.mail.re3.yahoo.com>
Message-ID: <eisl96$6bi$1@sea.gmane.org>

Antonios Katsikadamos wrote:
> Hi all. I am using python2.4 on suse linux 10.1 and i want to import the 
> mx.DateTime module. does anyone know where i can find this module and 
> how i can install it on linux?
> 
> I would appreciate any help.
> 
Look on www.egenix.com

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From cfbolz at gmx.de  Wed Nov  8 10:03:53 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 08 Nov 2006 16:03:53 +0100
Subject: Summer of PyPy Call for Proposals
Message-ID: <eisrl3$t90$1@sea.gmane.org>

Last chance to join the Summer of PyPy!
=======================================

Hopefully by now you have heard of the "Summer of PyPy", our program for
funding the expenses of attending a sprint for students.  If not, you've
just read the essence of the idea :-)

However, the PyPy EU funding period is drawing to an end and there is
now only one sprint left where we can sponsor the travel costs of
interested students within our program. This sprint will probably take
place in Leysin, Switzerland from 8th-14th of January 2007.

So, as explained in more detail at:

    http://codespeak.net/pypy/dist/pypy/doc/summer-of-pypy.html

we would encourage any interested students to submit a proposal in the
next month or so.  If you're stuck for ideas, you can find some at

    http://codespeak.net/pypy/dist/pypy/doc/project-ideas.html

but please do not feel limited in any way by this list!

Cheers,

Carl Friedrich Bolz and the PyPy team



From elderic at ish.de  Thu Nov  2 11:18:22 2006
From: elderic at ish.de (elderic)
Date: 2 Nov 2006 08:18:22 -0800
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>
	<1162478431.624590.29290@m7g2000cwm.googlegroups.com>
	<mailman.1667.1162483361.11739.python-list@python.org>
Message-ID: <1162484302.234145.245320@e3g2000cwe.googlegroups.com>

> > I just wanted to know if there was a keyword for functions, too.
> >
> > Then u could've done: type(f) is function
> > quite similar to: type(x) is int
>
> but why do you think you need that, when you have callable() ?  unless
> you're doing specialized stuff, there's really no reason to distinguish
> between function objects and other callables.
>
> </F>

I never said that I need anything - I merely asked for alternatives. =)
I'm pretty happy with the types-module or the callable() test.

Basically it's just for wrapping the creation of Tk-Buttons, etc.
They need a callback and in my process to learn I wanted to know about
the
possible options to test for that.

peace of mind. =)
elderic



From steve at holdenweb.com  Thu Nov  2 10:39:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 15:39:09 +0000
Subject: string formatter for tuple
In-Reply-To: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
Message-ID: <eid3cn$ft7$2@sea.gmane.org>

jeremito wrote:
> I have the following in my code
> 
> a = (1,2,3)
> print "a = %s" %a
> 
> But when I run this, I get:
> 
> TypeError: not all arguments converted during string formatting
> 
> Now I realize why this happens, a is actually 3 elements when the print
> statement is only expecting to print one value.  I tried
> 
> print "a = %s" %(a)
> 
> but I got the same error.
> 
> How can I print a tuple with a single string format?
> Thanks,
> Jeremy
> 

Try

   print "a = %s" % (a, )

The exception to the "a single object can be formatted as a single 
argument rather than a tuple" rule is when that single object is itself 
a tuple!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From dakman at gmail.com  Mon Nov 13 13:18:47 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 13 Nov 2006 10:18:47 -0800
Subject: tab compleation input
In-Reply-To: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>
References: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>
Message-ID: <1163441927.046482.218330@e3g2000cwe.googlegroups.com>

On a gui on this would be a little bit easier but it's a completley
diffrent realm when doing it in the console. It makes it a little more
difficult when using stdin.readline() because you can only read line by
line. Here is my implmentation.

import sys

validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]
while True:
    sys.stdout.write("Answer the Question: ")
    answer = sys.stdin.readline().rstrip()
    for valid in validanswers:
        if valid.startswith(answer.strip("\t")):
            answer = valid
    else:
        print "Invalid Answer: Please enter a valid answer"
        continue
    break
print "You have answered, ", answer

I'm at school and wasn't able to test it, but it looks like it should
work.

Eli Criffield wrote:
> Here is what i want to do. I have a question in my program, and i want
> to do tab completion for the valid answers.
>
> Say i have :
> --snip--
> validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]
>
> #and i ask
>
> sys.stdout.write("Answer the Question: ")
> answer = sys.stdin.readline().rstrip()
> if answer not in valid answers:
>   print "Wrong!"
> --snip--
>
> But what i want is when i enter the answer i can hit tab and it'll
> complete one of the validanswers
> I know i can do tab complete with readline and 'raw_input('> ')' but
> that's only to execute python commands right?
> 
> Eli



From no at spam.com  Thu Nov  9 12:32:17 2006
From: no at spam.com (Farshid Lashkari)
Date: Thu, 09 Nov 2006 09:32:17 -0800
Subject: Multithreaded C API Python questions
In-Reply-To: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
Message-ID: <CCJ4h.98780$or7.87509@newsfe08.phx>

Svein Seldal wrote:
> I'm unable to get access to python as long as another python call is 
> executing. The PyEval_AcquireThread() call blocks until the first call 
> returns. I was hoping that the python system itself would release the 
> GIL after some execution, but it itsnt.
> 
> I am dependent upon the ability to have to threads executing in python 
> land at the same time. How can this be done?

Are you creating your threads through python or through C code? If you 
are only creating it through C code, then make sure you initialize the 
GIL with the following call at the beginning of your application:

PyEval_InitThreads()

 From my experience, calling PyGILState_Ensure() was enough. I didn't 
need to call any extra threading functions. But make sure that every 
call to PyGILState_Ensure() is matched with a call to PyGILState_Release()

-Farshid


From gagsl-py at yahoo.com.ar  Thu Nov  2 15:38:35 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Nov 2006 17:38:35 -0300
Subject: __doc__ in compiled script
Message-ID: <7.0.1.0.0.20061102172803.05831948@softlab.com.ar>

Hello

I have a script starting with a docstring. After compiling it with 
compile(), is there any way I could get the docstring? __doc__ on the 
code object doesn't work.
I can't use __import__ because the script has top-level statements 
that have to be executed only once (it's not supposed to be used as a module).

--- begin test.py ---
body = """
"This is a docstring"

x=0
some(code).toBeExecuted("later")
"""

co = compile(body,'<string>','exec')
print co.__doc__

# what can I use for "something" below: ?
assert something(co)=="This is a docstring"
--- end test.py ---


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From gagsl-py at yahoo.com.ar  Tue Nov  7 15:22:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 17:22:25 -0300
Subject: Character encoding
In-Reply-To: <1162930201.211625.77050@m73g2000cwd.googlegroups.com>
References: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
	<1162928387.620610.31290@h48g2000cwc.googlegroups.com>
	<1162930201.211625.77050@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107172202.0554d618@yahoo.com.ar>

At Tuesday 7/11/2006 17:10, mp wrote:

>I'd prefer a more generalized solution which takes care of all possible
>ampersand characters. I assume that there is code already written which
>does this.

Try the htmlentitydefs module


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From cameron.walsh at gmail.com  Wed Nov 29 03:03:38 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Wed, 29 Nov 2006 16:03:38 +0800
Subject: PIL throws exception when reading bitmap/pnm data
Message-ID: <ekjes3$2gp$1@enyo.uwa.edu.au>

Hi all,

I'm trying to extract the data from a bitmap or .pnm file using the
following code:

import Image
img = Image.open("test.bmp","r")
data=img.getdata()

Unfortunately I get the following exception on Linux, but not on Windows:

>>> data=img.getdata()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.5/site-packages/PIL/Image.py", line 796,
in getdata
    self.load()
  File "/usr/local/lib/python2.5/site-packages/PIL/ImageFile.py", line
147, in load
    self.map = mmap.mmap(file.fileno(), size)
EnvironmentError: [Errno 19] No such device


At this time, I cannot provide the full bitmap for copyright reasons,
but I can provide some information about the bitmap:

cameron at cameron-laptop:~$ file test.bmp
test.bmp: PC bitmap data, Windows 3.x format, 1000 x 1000 x 8

The same code works for .ppm images in the same folder:

cameron at cameron-laptop:~$ convert test.bmp test.ppm
cameron at cameron-laptop:~$ python
import Image
img=Image.open("test.ppm")
data=img.getdata()

But does not work for .pnm images in the same folder:

cameron at cameron-laptop:~$ convert test.bmp test.pnm
cameron at cameron-laptop:~$ python
import Image
img=Image.open("test.pnm")
data=img.getdata()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.5/site-packages/PIL/Image.py", line 796,
in getdata
    self.load()
  File "/usr/local/lib/python2.5/site-packages/PIL/ImageFile.py", line
147, in load
    self.map = mmap.mmap(file.fileno(), size)
EnvironmentError: [Errno 19] No such device




PIL Version on Linux and Windows:

$Id: Image.py 2337 2005-03-25 07:50:30Z fredrik $


How can I avoid this error without converting each image into a
different format?


Thanks and regards,

Cameron.


From amitsoni.1984 at gmail.com  Tue Nov  7 07:09:02 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 7 Nov 2006 04:09:02 -0800
Subject: using split function
In-Reply-To: <mailman.1833.1162882250.11739.python-list@python.org>
References: <1162874036.351559.263280@i42g2000cwa.googlegroups.com>
	<1162874295.593635.273260@i42g2000cwa.googlegroups.com>
	<mailman.1833.1162882250.11739.python-list@python.org>
Message-ID: <1162901342.522694.37470@b28g2000cwb.googlegroups.com>

Thanks a lot, I am done with that part. But now I am facing another
problem. I am using the code given below where A is a matrix and row is
a sequence. But it gives following error:

-------- error------
    A[a,:]=row
ValueError: setting an array element with a sequence.

--------------code----------------
#!/usr/bin/python
import numpy
file1 = open('matrix.txt', 'r')

count =  0
a=0
b=0
c=0
d=0
e=0
A = numpy.zeros([4,4])
while 1:
    lineStr = file1.readline()
    if not(lineStr):
        break

    count = count + 1
    row=lineStr.split()
    if count<=4:
        A[a,:]=row
        a=a+1
    elif count<=8:
        B[b,:]=row
        b=b+1
    elif count<=12:
        C[c,:]=row
        c=c+1
    elif count<=16:
        D[d,:]=row
        d=d+1
    elif count<=20:
        E[e,:]=row
        e=e+1

file1.close()
---------end of code-------------

is there any way to change a sequence to array?
thank you
Amit

Gabriel Genellina wrote:
> > > I have to write a code in python to read a matrix from a text file and
> > > for that i am using following code. But it gives an error saying
> > > "NameError: name 'split' is not defined". Can anyone help me with this.
>
> A few hints:
> - don't use "file" as a name - it shadows the builtin "file" type
> - matrix.close() won't work, perhaps you meant file.close()?
>
> > > -----------------------------------------------------
> > > Also, i want to initialize the matrix A by zeros, but using A=zeros([4,
> > > 4]) was giving a similar error "NameError: name 'zeros' is not
> > > defined".
>
> Oh, so *that's* why you build it using standard_normal and then
> overwrite the contents!
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar



From robert.kern at gmail.com  Tue Nov 21 20:31:47 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Nov 2006 19:31:47 -0600
Subject: Trying to understand Python objects
In-Reply-To: <87fyccwacn.fsf@benfinney.id.au>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<87fyccwacn.fsf@benfinney.id.au>
Message-ID: <ek09ah$6vi$1@sea.gmane.org>

Ben Finney wrote:
> Or, the attributes are added to a specific instance (often in the
> initialisation method) so that each instance has a separate attribute
> with the same name::
> 
>     class Point(object):
>         spam = 4
>         def __init__(self):
>             eggs = 2

There's a typo there. For the sake of not confusing the OP, this is correct:

class Point(object):
    spam = 4
    def __init__(self):
        self.eggs = 2


-- 
Robert Kern

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



From stephen.ayotte at gmail.com  Mon Nov 20 10:33:49 2006
From: stephen.ayotte at gmail.com (stephen.ayotte at gmail.com)
Date: 20 Nov 2006 07:33:49 -0800
Subject: os x make install dies when compiling zipfile.py on 2.5 and 2.4.4
In-Reply-To: <1164033984.637054.21800@h48g2000cwc.googlegroups.com>
References: <1162848039.627681.22980@m7g2000cwm.googlegroups.com>
	<1164033984.637054.21800@h48g2000cwc.googlegroups.com>
Message-ID: <1164036829.496489.227360@h48g2000cwc.googlegroups.com>

Sorry about the top-post earlier.

I just tested installing 2.4.4 on the same machine that built it--- it
ran without a complaint. The line that follows the "Compiling
zipfile.py" line (possibly the one that is failing for us) is as
follows:

Compiling /Home/admin/sayotte/python-test/lib/python2.4/zipfile.py ...
PYTHONPATH=/Home/admin/sayotte/python-test/lib/python2.4   \
        ./python -Wi -t
/Home/admin/sayotte/python-test/lib/python2.4/compileall.py \
        -d /Home/admin/sayotte/python-test/lib/python2.4/site-packages
-f \
        -x badsyntax
/Home/admin/sayotte/python-test/lib/python2.4/site-packages
Listing /Home/admin/sayotte/python-test/lib/python2.4/site-packages ...

Were you by chance also executing the build and install steps on
different platforms?



From sjmachin at lexicon.net  Wed Nov  1 13:39:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 02 Nov 2006 05:39:12 +1100
Subject: report progress from C function
In-Reply-To: <20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>
References: <20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>
Message-ID: <4548E9D0.1040007@lexicon.net>

On 2/11/2006 12:53 AM, Michael S wrote:
> I downloaded Pyrex and ran it through their own
> example. The code looks quite messy, and I even saw a
> few "goto"s. 
> I think I will stick with my own code for now.
> Thanks in any case.

If your own code is doing the right amount of reference counting, error 
handling and clean-up on module exit, it will look messy and have gotos 
as well. The advantage of Pyrex is that you write in a high-level 
language, and it writes the mess.

HTH,
John


From p.m.deandraderodrigues at gmail.com  Wed Nov  8 08:31:22 2006
From: p.m.deandraderodrigues at gmail.com (Pedro Rodrigues)
Date: Wed, 8 Nov 2006 14:31:22 +0100
Subject: Help solving Python 2.5 crash: The instruction "0x7c168f1d"
	referenced memory at "0x00000001c" ...
Message-ID: <26195e840611080531w5c50e0f3l2fd2c2785877ec34@mail.gmail.com>

Hi everyone,

recently, I have installed Python 2.5 in a Windows XP (SP2) system, along
with the numarray, PIL, and PyWin packages. Since then, I've been getting
the following error message whenever I run one of my simulations within
PyWin:

The instruction "0x7c168f1d" referenced memory at "0x00000001c". The memory
could not be "read".


If I run the same simulation from the python interactive shell, it still
crashes but with a different error message:

This application has requested runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


The simulation demands a lot of memory but this shouldn't be the problem as
it run in Windows XP before I switched to version 2.5. I've already tried to
remove version 2.5 and install version 2.4.3 (the one I had before), but the
I get the same problem :(

Has anyone every experienced such a thing? Suggestions on how to solve this?


greetings,
pedro rodrigues
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From gagsl-py at yahoo.com.ar  Fri Nov 24 21:47:35 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 23:47:35 -0300
Subject: combining the path and fileinput modules
In-Reply-To: <4565BC89.9060901@mac.com>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
Message-ID: <7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>

At Thursday 23/11/2006 12:21, wo_shi_big_stomach wrote:

> >> dir = path(/home/wsbs/Maildir)
> >> for f in dir.walkfiles('*'):
> >>      #
> >>      # test:
> >>      # print f
> >
> > Are you absolutely sure that f list doesn't contain
> > any path to directory, not file?
> > Add this:
> >
> >         f = filter(os.path.isfile, f)
> >
> > and try one more time.
>
>Sorry, no joy. Printing f then produces:
>
>rppp
>rppppp
>rppppp

The filter should be applied to walkfiles. Something like this:

dir = path(/home/wsbs/Maildir)
for f in filter(os.path.isfile, dir.walkfiles('*')):
         #
         # test:
         # print f


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From robert.kern at gmail.com  Wed Nov 15 03:02:21 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 15 Nov 2006 02:02:21 -0600
Subject: reduce to be removed?
In-Reply-To: <slrnellheq.r7i.apardon@rcpc42.vub.ac.be>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>	<mailman.2122.1163291415.11739.python-list@python.org>	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>	<mailman.2127.1163297289.11739.python-list@python.org>	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>	<mailman.0.1163325764.32031.python-list@python.org>	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>	<1163378573.018479.261660@b28g2000cwb.googlegroups.com>	<1163559479.415682.138010@k70g2000cwa.googlegroups.com>	<mailman.179.1163560927.32031.python-list@python.org>
	<slrnellheq.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <ejehiq$8jo$1@sea.gmane.org>

Antoon Pardon wrote:
> On 2006-11-15, Robert Kern <robert.kern at gmail.com> wrote:
>> Dustan wrote:
>>
>>> 2. While I haven't taken a good look at NumPy, my intuition tells me it
>>> won't work with complex data types, which wouldn't work for me at all.
>>>
>>> Am I correct on that second one?
>> No. numpy can make arrays of Python objects in addition to arrays of double,
>> unsigned int, etc.
> 
> Does numpy still gain you much if you have arrays of Python objects?

It depends on what you want out of it. You won't get fast math, but you will get
convenient multidimensional indexing, slicing, stacking, reshaping, and
transposition.

-- 
Robert Kern

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



From lorenlightng at gmail.com  Thu Nov 30 18:08:46 2006
From: lorenlightng at gmail.com (g4rlik)
Date: Thu, 30 Nov 2006 15:08:46 -0800 (PST)
Subject: v2.3, 2.4, and 2.5's GUI is slow for me
Message-ID: <7630074.post@talk.nabble.com>


I've been asking all over the place, namely different forums.  I even
e-mailed help at python.org about my problem, but they couldn't assist me too
much.

My problem is..the GUI for versions 2.3, 2.4, and 2.5 of Python run very
sluggishly.  When I type in them or move them around my desktop, it's very
slow.  I have figured out that this is because of the subprocesses running.  

To cope with this problem, I created an idle.txt file, and added this to the
first line of it:

c:\python25\python c:\python25\Lib\idlelib\idle.py -n

After that I saved the extension to .bat and now when I run that file, the
Python GUI opens without any subprocesses running and I have no problem. 
However, I'd still really like to know how I could fix this problem even
more.  I honestly don't understand why the GUI is so sluggish for me.  The
GUIs for Python version 2.2 and below run fine for me.  My system specs are
as follows:

Windows XP Home Edition
AMD Athlon XP 2800
nVidia 6800GT
1 gig of RAM

If anyone else could help, that would be great.
-- 
View this message in context: http://www.nabble.com/v2.3%2C-2.4%2C-and-2.5%27s-GUI-is-slow-for-me-tf2735011.html#a7630074
Sent from the Python - python-list mailing list archive at Nabble.com.



From wo_shi_big_stomach at mac.com  Wed Nov 22 23:30:40 2006
From: wo_shi_big_stomach at mac.com (wo_shi_big_stomach)
Date: Wed, 22 Nov 2006 20:30:40 -0800
Subject: combining the path and fileinput modules
Message-ID: <456523F0.9050803@mac.com>

Newbie to python writing a script to recurse a directory tree and delete
the first line of a file if it contains a given string. I get the same
error on a Mac running OS X 10.4.8 and FreeBSD 6.1.

Here's the script:

# start of program

# p.pl - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with "From "
# for each match, program deletes line

import fileinput
import os
import re
import string
import sys
from path import path

# recurse dirs
dir = path(/home/wsbs/Maildir)
for f in dir.walkfiles('*'):
 	#
	# test:
	# print f
	#
	# open file, search, change if necessary, write backup
 	for line in fileinput.input(f, inplace=1, backup='.bak'):
		# check first line only
		if fileinput.isfirstline():
 			if not re.search('^From ',line):
 				print line.rstrip('\n')
 		# just print all other lines
 		if not fileinput.isfirstline():
 			print line.rstrip('\n')
 	fileinput.close()
# end of program

The script produces this error:

Traceback (most recent call last):
  File "./p", line 22, in ?
    for line in fileinput.input(f, inplace=1, backup='.bak'):
  File "/sw/lib/python2.4/fileinput.py", line 231, in next
    line = self.readline()
  File "/sw/lib/python2.4/fileinput.py", line 300, in readline
    os.rename(self._filename, self._backupfilename)
OSError: [Errno 21] Is a directory

If I uncomment that test routine, and comment out the fileinput stuff,
the program DOES print the full pathname/filename for the variable f.

Many thanks for clues as to why fileinput.input doesn't like f.



From fabianosidler at gmail.com  Fri Nov  3 16:26:00 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Fri, 3 Nov 2006 21:26:00 +0000
Subject: getattrfunc vs. tp_methods
Message-ID: <200611032126.00171.fabianosidler@gmail.com>

Hello list!

Writing a C extension module, which way is better to implement attribute
retrieval, by a getattr function in the PyTypeObject struct or by an entry
tp_methods? I don't need any black magic being executed on attribute access,
so I would tend towards the tp_methods entry. Any argument against it?

Greetings,
Fips


From bronger at physik.rwth-aachen.de  Tue Nov  7 04:13:55 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 07 Nov 2006 10:13:55 +0100
Subject: PIL: match for ImageMagick's display -ping
Message-ID: <87ac33obzg.fsf@wilson.homeunix.com>

Hall?chen!

I have to extract the dimensions of many bitmap files.  An old Bash
script did it with ImageMagick's "display -ping ...".  "-ping" means
that it extracts the image dimensions efficiently.  I suspect it
simply doesn't read the image itself.

Now the Bash script has been transformed into Python+PIL.  Is there
a way to get the dimensions equally efficient here, or does the PIL
even do this optimisation implicitly since I never access the image
bitmap itself?

Thank you!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                                    ICQ 264-296-646
                   (See http://ime.webhop.org for Jabber, MSN, etc.)


From ronrsr at gmail.com  Fri Nov 10 12:01:39 2006
From: ronrsr at gmail.com (ronrsr)
Date: 10 Nov 2006 09:01:39 -0800
Subject: SyntaxError: Invalid Syntax.
Message-ID: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>

no matter where I place this imported file,the statement after it in
the main program gets a syntax error, regardless of the syntax.

I think I may have changed something in this file, but I'm stuck.  Can
anyone help?

#!/usr/local/bin/python
# Copyright 2004 by Stephen Masterman

#Change the db connection details here.


import MySQLdb




def connect():


   return =  MySQLdb.connect (host = "db91x.xxxx.com",
                           user = "xxxx",
                            passwd = "xxxxx",
			db = "homebase_zingers"
                           );



From fredrik at pythonware.com  Mon Nov  6 09:10:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 06 Nov 2006 15:10:06 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <eiklvo$5uj$1@hefestos.uned.es>
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <einfnu$arh$1@sea.gmane.org>

Ernesto Garc?a Garc?a wrote:

> it's very common that I have a list and I want to print it with commas 
> in between. How do I do this in an easy manner, whithout having the 
> annoying comma in the end?

I've collected a bunch of list pydioms and other notes here:

    http://effbot.org/zone/python-list.htm

For formatting issues, see:

    http://effbot.org/zone/python-list.htm#printing

</F>



From rw at smsnet.pl  Thu Nov 23 09:15:36 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: 23 Nov 2006 06:15:36 -0800
Subject: combining the path and fileinput modules
In-Reply-To: <mailman.617.1164256248.32031.python-list@python.org>
References: <mailman.617.1164256248.32031.python-list@python.org>
Message-ID: <1164291336.523872.131610@h54g2000cwb.googlegroups.com>


wo_shi_big_stomach wrote:
> Newbie to python writing a script to recurse a directory tree and delete
> the first line of a file if it contains a given string. I get the same
> error on a Mac running OS X 10.4.8 and FreeBSD 6.1.
>
> Here's the script:
>
> # start of program
>
> # p.pl - fix broken SMTP headers in email files
> #
> # recurses from dir and searches all subdirs
> # for each file, evaluates whether 1st line starts with "From "
> # for each match, program deletes line
>
> import fileinput
> import os
> import re
> import string
> import sys
> from path import path
>
> # recurse dirs
> dir = path(/home/wsbs/Maildir)
> for f in dir.walkfiles('*'):
>  	#
> 	# test:
> 	# print f

Are you absolutely sure that f list doesn't contain
any path to directory, not file?
Add this:

        f = filter(os.path.isfile, f)

and try one more time.

> 	#
> 	# open file, search, change if necessary, write backup
>  	for line in fileinput.input(f, inplace=1, backup='.bak'):
> 		# check first line only
> 		if fileinput.isfirstline():
>  			if not re.search('^From ',line):
>  				print line.rstrip('\n')
>  		# just print all other lines
>  		if not fileinput.isfirstline():
>  			print line.rstrip('\n')
>  	fileinput.close()
> # end of program

-- 
HTH,
Rob



From apardon at forel.vub.ac.be  Wed Nov  8 08:24:30 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Nov 2006 13:24:30 GMT
Subject: please help with optimisation of this code - update of given
	table according to another table
References: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>
Message-ID: <slrnel3mkd.8b8.apardon@rcpc42.vub.ac.be>

On 2006-11-08, Farraige <farraige at go2.pl> wrote:
>
> ...
>
> The main part of my algorithm now looks something like ...
>
> merge(t1, t2, keyColumns, columnsToBeUpdated)
>
> .......
>
>         for row_t1 in t1:
>             for  row_t2 in t2:
>                 if [row_t1[i] for i in keyColumns] == [row_t2[j] for j
> in keyColumns]:
>                     # the keys are the same
>                     for colName in columnsToBeUpdated:
>                         row_t1[colName] = row_t2[colName]
>
>                     # go outside the inner loop - we found a row with
>                     # the same key in the table
>                     break
>
> In my algorithm I have 2 for loops and I have no idea how to optimise
> it (maybe with map? )
> I call this method for very large data and the performance is a
> critical issue for me :(
>
> I will be grateful for any ideas

One idea would be to precompute the list comprehensions in the if test.

    p2 = [[row_t2[i] for i in keyColums] for row_t2 in t2]
    for row_t1 in t1:
        proj1 = [row_t1[i] for i in keyColumns]
        for row_t1, proj2 in izip(t2, p2):
	    if proj1 == proj2:
	       ...


-- 
Antoon Pardon


From john106henry at hotmail.com  Fri Nov 17 13:44:02 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 10:44:02 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <slrnelrkrt.7ok.apardon@rcpc42.vub.ac.be>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
	<1163746781.666937.63970@h48g2000cwc.googlegroups.com>
	<slrnelrkrt.7ok.apardon@rcpc42.vub.ac.be>
Message-ID: <1163789041.970477.13550@h48g2000cwc.googlegroups.com>

I suppose you are right.  I guess I ended up with an odd case.

I was thinking that:

To change "HIDE*S*ST1" to "HIDE*D*ST1", all you do is remove the "*S*"
from the source and the "*D*" from the target.

In order to change "HIDE*SC*T1" to "HIDE*DS*T1", I thought you have to
remove 2 characters *SC* from the source.   Then I realize that it's
not true.  If you remove the "C" from the source, and the "D" from the
*DS* of the destination, it's a match (!)

So, yes, they have the same distance!


Antoon Pardon wrote:
> On 2006-11-17, John Henry <john106henry at hotmail.com> wrote:
> > I encountered a case where I am trying to match "HIDESST1" and
> > "HIDESCT1" against ["HIDEDST1", "HIDEDCT1", "HIDEDCT2", "HIDEDCT3"]
> >
> > Well, they both hit "HIDEDST1" as the first match which is not exactly
> > the result I was looking for.  I don't understand why "HIDESCT1" would
> > not hit "HIDEDCT1" as a first choice.
>
>     H I D E D S T 1     H I D E D C T 1
>
>  H  .                   .
>  I    .                   .
>  D      .                   .
>  E        .                   .
>  S            .
>  C                                .
>  T              .                   .
>  1                .                   .
>
> As far as I can see the distance of HIDEDCT1 to HIDESCT1 is
> the same as the distance of HIDEDCT1 to HIDEDST1. In both
> cases you have to remove one character from the target as well
> as one character from the candidate in order to get the
> same substring.
> 
> -- 
> Antoon Pardon



From timothy at open-networks.net  Tue Nov 14 03:58:28 2006
From: timothy at open-networks.net (timmy)
Date: Tue, 14 Nov 2006 18:58:28 +1000
Subject: deleteing item from a copy of a list
Message-ID: <455984b5@quokka.wn.com.au>

i make a copy of a list, and delete an item from it and it deletes it 
from the orginal as well, what the hell is going on?!?!?!

#create the staff copy of the roster
	Roster2 = []
	for ShiftLine in Roster:
		#delete phone number from staff copy
		Roster2.append(ShiftLine)
		del Roster2[len(Roster2)-1][1]

Roster2 should have nothing to do with Roster, right??? doing a print of 
both lists confirms that the phone number has been removed from both


From fredrik at pythonware.com  Thu Nov 16 05:11:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:11:35 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <1163671192.876928.35960@f16g2000cwb.googlegroups.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
Message-ID: <ejhdgm$gve$1@sea.gmane.org>

Paul Boddie wrote:

>> Yes, it is. Just look at the API. It's an attribute of an Element, isn't it?
>> What other API do you know where removing an element from a data structure
>> leaves part of the element behind?
> 
> I guess it depends on what you regard an element to be...

Stefan said "Element", not "element".

"Element" is a class in the "ElementTree" module, which can be used to 
*represent* an XML element in an XML infoset, including all the data 
*inside* the XML element, and any data *between* that XML element and 
the next one (which is always character data, of course).

It's not very difficult, really; especially if you, as Stefan said, 
think in infoset terms rather "a sequence of little piggies" terms.

</F>



From dickinsm at gmail.com  Wed Nov 29 18:33:05 2006
From: dickinsm at gmail.com (dickinsm at gmail.com)
Date: 29 Nov 2006 15:33:05 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
Message-ID: <1164843185.361082.146740@16g2000cwy.googlegroups.com>

> BTW, can this code be made any more efficient?

I'm not sure, but the following code takes around 6 seconds on my
1.2Ghz iBook. How does it run on your machine?

def smallPrimes(n):
    """Given an integer n, compute a list of the primes < n"""

    if n <= 2:
        return []

    sieve = range(3, n, 2)
    top = len(sieve)
    for si in sieve:
        if si:
            bottom = (si*si - 3)//2
            if bottom >= top:
                break
            sieve[bottom::si] = [0] * -((bottom-top)//si)

    return [2]+filter(None, sieve)

smallPrimes(10**7)




>
> ============
>
> #!/usr/bin/python -OO
> import math
> import sys
> import psyco
>
> psyco.full()
>
> def primes():
>     primes=[3]
>     for x in xrange(5,10000000,2):
>         maxfact = int(math.sqrt(x))
>         flag=True
>         for y in primes:
>             if y > maxfact:
>                 break
>             if x%y == 0:
>                 flag=False
>                 break
>         if flag == True:
>             primes.append(x)
> primes()



From sjmachin at lexicon.net  Thu Nov  9 12:07:27 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 09:07:27 -0800
Subject: pack a three byte int
In-Reply-To: <dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
Message-ID: <1163092047.577688.140400@m73g2000cwd.googlegroups.com>


Dave Opstad wrote:
> Sorry, that should have been:
>
> cdb += struct.pack(">L", skip)[1:]
>

">L" and ">I" produce exactly the same 4-byte result. The change from
[-3:] to [1:] is a minor cosmetic improvement, but obscures the
underlying ... a bit like putting mascara on a pig. I got the
impression that the OP was interested in more radical improvement.

Cheers,
John



From apardon at forel.vub.ac.be  Wed Nov 29 08:08:31 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 29 Nov 2006 13:08:31 GMT
Subject: Problem with imaplib (weird result if mailbox contains a %)
References: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>
	<1164727244.400677.36150@l12g2000cwl.googlegroups.com>
	<slrnemqfhg.al8.apardon@rcpc42.vub.ac.be>
	<1164803590.454993.141050@j72g2000cwa.googlegroups.com>
Message-ID: <slrnemr1if.1ra.apardon@rcpc42.vub.ac.be>

On 2006-11-29, Leo Kislov <Leo.Kislov at gmail.com> wrote:
> Antoon Pardon wrote:
>> On 2006-11-28, Leo Kislov <Leo.Kislov at gmail.com> wrote:
>> >
>> Are there more docs than at http://www.python.org/doc/. I don't find
>> those very helpfull in explaining this.
>>
>> I also took a look at rfc 2060 and to be honest I don't find anything
>> there to explain this difference. I only took a closer look at section
>> 7.2.2. So maybe I should look somewehere else but after reading section
>> 7.2.2. I don't understand why the list method returned a tuple for this
>> mailbox instead of the following string:
>>
>>    '(\\HasNoChildren) "/" "user/cpapen/newsletters %"'
>
> This is described in section 4.3. imaplib is too close to the protocol.
> It should interpret response for each command separately. For example
> list method could return list of tuples like:
>
> ("\\HasNoChildren", "/", "user/cpapen/newsletters %")
>
> Without this abstraction level in imaplib you have to build it
> yourself.

Ah yes, I'm beginning to understand now, what is going on.

I also did a imap session by hand using telnet. That helped.

>> >> If it is, is it fixed in later versions?
>> >
>> > Why don't you try to pull imaplib.py from later versions? I don't think
>> > it changed that much so it should be compatible with python 2.3
>>
>> I could take my hands on a 2.4 version and the result was the same.
>
> I was talking only about empty string response. Is it still there?
> Anyway, this issue requires investigation. That could also be a bug in
> the server.

The empty line is still there using 2.4.
This is part of the session I did by hand. It doesn't seem to be a
server problem.

$ telnet machine.domain imap
Trying xxx.xxx.xxx.xxx...
Connected to machine.domain
Escape character is '^]'.
* OK maxi Cyrus IMAP4 v2.2.13 server ready
0001 LOGIN ... ....
0001 OK User logged in
0002 LIST "" user/cpapen/*
* LIST (\HasNoChildren) "/" "user/cpapen/Out"
...
* LIST (\HasNoChildren) "/" "user/cpapen/music &- beats"
* LIST (\HasNoChildren) "/" {25}
user/cpapen/newsletters %
* LIST (\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"
* LIST (\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"
...


Many thanks for your contribution.

-- 
Antoon Pardon


From steve at holdenweb.com  Tue Nov  7 13:55:46 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 13:55:46 -0500
Subject: [DLC] ChiPy Monthly Meeting, Thursday 7:00 pm.
In-Reply-To: <1162921007.26531.275231865@webmail.messagingengine.com>
References: <1162921007.26531.275231865@webmail.messagingengine.com>
Message-ID: <eiqkpa$23c$1@sea.gmane.org>

I don't suppose there's any chance that someone might be passing 
Schaumberg on their way to this meeting? I'm teaching there, and a ride 
would avoid me having to rent a car (and hence increase the probability 
I'd make it).

regards
  Steve

bray at sent.com wrote:
> Thursday November 9 2006. 7:00 pm.
> 
> This may be our best meeting yet. This is our regular Thurs. meeting. In
> addition stay tuned for a special meeting to welcome Ed Leafe 
> http://chipy.org/EdOnDabo.
> 
> Please ping the list to tell us what you want to address in your
> lightning talk. Lets try to get one talk from each brave soul for about
> 5 minutes
> a piece.
> 
> Topics
> ------
> 
> - Python Mock Library - fawad
> - Web log generation and parsing
> - lightning talks
> 
> Location
> --------
> 
> Daisychain - 2159 W 21st Pl, Chicago il 60608 http://www.dai5ychain.net/
> map - http://tinyurl.com/ybdcxb
> 
> About ChiPy
> -----------
> 
> ChiPy is a group of Chicago Python Programmers, l33t, and n00bs.
> Meetings are held monthly at various locations around Chicago.
> Also, ChiPy is a proud sponsor of many Open Source and Educational
> efforts in Chicago. Stay tuned to the mailing list for more info.
> 
> ChiPy website: <http://chipy.org>
> ChiPy Mailing List: <http://mail.python.org/mailman/listinfo/chicago>
> Python website: <http://python.org>
> 
> ---
> 
> 
> _______________________________________________
> DLC mailing list
> DLC at mailman.depaul.edu
> http://mailman.depaul.edu/mailman/listinfo/dlc
> http://linux.depaul.edu/
> 


-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From meyer at acm.org  Fri Nov  3 06:30:04 2006
From: meyer at acm.org (Andre Meyer)
Date: Fri, 3 Nov 2006 12:30:04 +0100
Subject: Feature Request: Py_NewInterpreter to create separate GIL (branch)
In-Reply-To: <eif6qp$7l5$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net> <eif219$bat$1@news.sap-ag.de>
	<eif6qp$7l5$1@news.albasani.net>
Message-ID: <7008329d0611030330r3975076ctcbd341dc9e962318@mail.gmail.com>

Hi all

Strange enough, there does not even seem to be interest in removing the GIL
in Python 3000.

For some interesting answers on this topic you may read through the thread
"Kill GIL" on the py3k mailing list archives:
<http://mail.python.org/pipermail/python-3000/2006-September/thread.html>.

kind regards
Andr?


On 11/3/06, robert <no-spam at no-spam-no-spam.invalid> wrote:
>
> Feature Request: Py_NewInterpreter to create separate GIL (branch)
>
> Daniel Dittmar wrote:
> > robert wrote:
> >> I'd like to use multiple CPU cores for selected time consuming Python
> >> computations (incl. numpy/scipy) in a frictionless manner.
> >>
> >> Interprocess communication is tedious and out of question, so I
> >> thought about simply using a more Python interpreter instances
> >> (Py_NewInterpreter) with extra GIL in the same process.
> >
> > If I understand Python/ceval.c, the GIL is really global, not specific
> > to an interpreter instance:
> > static PyThread_type_lock interpreter_lock = 0; /* This is the GIL */
> >
>
> Thats the show stopper as of now.
> There are only a handfull funcs in ceval.c to use that very global lock.
> The rest uses that funcs around thread states.
>
> Would it be a possibilty in next Python to have the lock separate for each
> Interpreter instance.
> Thus: have *interpreter_lock separate in each PyThreadState instance and
> only threads of same Interpreter have same GIL?
> Separation between Interpreters seems to be enough. The Interpreter runs
> mainly on the stack. Possibly only very few global C-level resources would
> require individual extra locks.
>
> Sooner or later Python will have to answer the multi-processor question.
> A per-interpreter GIL and a nice module for tunneling Python-Objects
> directly between Interpreters inside one process might be the answer at the
> right border-line ? Existing extension code base would remain compatible, as
> far as there is already decent locking on module globals, which is the the
> usual case.
>
> Robert
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Dr. Andre P. Meyer                        http://python.openspace.nl/meyer
TNO Defence, Security and Safety          http://www.tno.nl/
Delft Cooperation on Intelligent Systems  http://www.decis.nl/

Ah, this is obviously some strange usage of the word 'safe' that I wasn't
previously aware of. - Douglas Adams
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From fredrik at pythonware.com  Sat Nov 11 19:55:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 01:55:35 +0100
Subject: explicit self revisited
In-Reply-To: <Bot5h.5910$ig4.165@newsread2.news.pas.earthlink.net>
References: <ej5fuv$a4a$1@online.de>
	<ej5i3k$6l3$1@sea.gmane.org>	<mailman.2110.1163283825.11739.python-list@python.org>
	<Bot5h.5910$ig4.165@newsread2.news.pas.earthlink.net>
Message-ID: <ej5re5$s2j$1@sea.gmane.org>

Dennis Lee Bieber wrote:

>> one article at a time.  who's going to be the first one to argue that 
>> Python needs a goto statement ?
>>
> 	Especially since there is a comefrom <G>

ah, good point.  I've updated the FAQ.

</F>



From sturlamolden at yahoo.no  Wed Nov  8 15:16:24 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 8 Nov 2006 12:16:24 -0800
Subject: Python deployment options.
In-Reply-To: <1162995465.419376.229440@f16g2000cwb.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162995465.419376.229440@f16g2000cwb.googlegroups.com>
Message-ID: <1163016983.930850.50610@h54g2000cwb.googlegroups.com>

Fuzzyman wrote:

> I think that is an incorrect reading of the thread.
>
> The *Python* developers need a valid Visual Studio license to
> redistribute msvcr71.dll.
>
> When you build an app with py2exe you are just bundling Python with
> your application and so don't need the license.


Here is a summary of my understanding of the "problem", mind you that I
am not a lawayer:

The Python.org developers use a properly licensed VC7 to build Python.
Under the EULA they can redistribute msvcr71.dll along with Python.
Anyone can distribute Python from Python.org, and msvcr71.dll is a part
of this software. Thus, it is at least legally to distribute a Python
MSI installer from Python.org. If you make a Python program, you can
distribute Python along with the program. I.e. you don't need a VC7
license to sell software that someone else has made and includes
msvcr71.dll.

For Py2Exe things are a bit more complicated. It rips
Python.Runtime.dll from the Python directory, and renames it
Python24.dll. Python24.dll then depends on msvcr71.dll. It's not
obvious that one can still legally distribute msvcr71.dll along with
Python24.dll, even if  Python.Runtime.dll was built with a legally
licensed VC7. It is possible that Python24.dll or  msvcr71.dll in the
process looses it status as licensee software from Python.org's VC7.The
Python.org team don't care about the issue, it seems. If they did care,
they could settle the issue by putting up a zip-file with Python24.dll
and msvcr71.dll for download. I don't think they quite understand how
important Py2Exe is on Windows.

Buying a VC7 license is cheaper than paying a lawyer that understands
the problem. However, even with a VC7 license you can only redistribute
msvcr71.dll with software you build your self - so you need to build
Python your self and not use a Python24.dll ripped from Python.org's
Python distro. But then ... who cares?

Microsoft wants you to make software for their OS. They even have their
own version of Python for free download (aka IronPython). A MS lawyer
harassing you for legal details regarding msvcr71.dll is beyond
unlikely, although you never know. You can play nice and ask Microsoft
for permission to put msvcr71.dll inside your Py2Exe'd Python app.
Whether they will respond or grant permission I don't know.

Finally, patent issues are more important when making software for a
living. Are you sure nobody has a broad patent covering parts of your
software? These are often held by parasitic companies that use broad
software patents as spider webs to catch prey. They will suck blood
from you if they can, and give you less than nothing in return,
something Microsoft probably will not do. Microsoft makes and sells
software, including the Windows operating system, patent sharks just
thrive off their patents. Being sued by one of those are far more
likely.



From bearophileHUGS at lycos.com  Wed Nov 22 15:46:22 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 12:46:22 -0800
Subject: regex problem
In-Reply-To: <mailman.610.1164226191.32031.python-list@python.org>
References: <f4cc03640611221141j51f2bcb1wa06d7a05db42a46c@mail.gmail.com>
	<mailman.610.1164226191.32031.python-list@python.org>
Message-ID: <1164228382.661892.169220@j44g2000cwa.googlegroups.com>

> > line is am trying to match is
> > 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra    29.9    0.00011   1
> >
> > regex i have written is
> > re.compile
> > (r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)')
> >
> > I am trying to extract 0.0011 value from the above line.
> > why doesnt it match the group(4) item of the match ?
> >
> > any idea whats wrong  with it ?

I am not expert about REs yet, but I suggest you to use the re.VERBOSE
and split your RE in parts, like this:

example = re.compile(r"""^  \s*         # must start at the beginning +
optional whitespaces
                         ( [\[\(] )     # Group 1: opening bracket
                         \s*            # optional whitespaces
                         ( [-+]? \d+ )  # Group 2: first number
                         \s* , \s*      # optional space + comma +
optional whitespaces
                         ( [-+]? \d+ )  # Group 3: second number
                         \s*            # optional whitespaces
                         ( [\)\]] )     # Group 4: closing bracket
                         \s*  $         # optional whitespaces + must
end at the end
                      """, flags=re.VERBOSE)

This way you can debug and mantain it much better.

Bye,
bearophile



From rridge at csclub.uwaterloo.ca  Tue Nov 21 01:28:41 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 20 Nov 2006 22:28:41 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
	<4561515B.4060106@v.loewis.de>
	<1164046257.736569.267090@j44g2000cwa.googlegroups.com>
	<45623696.90504@v.loewis.de>
Message-ID: <1164090521.578144.245440@m73g2000cwd.googlegroups.com>


Martin v. L?wis wrote:
> Then I would use U+E000 for escaping. Each PUA character in the
> listed file name would get escaped with U+E000 in the Python
> string; when the file name is converted back to the system, it
> gets unescaped.

How would you tell an escaped file name containing these private use
characters obtain from os.listdir() from an unescaped file name
containing these characters obtained from some other source?

> Notice that I think this is a really unrealistic case - I expect
> that all file names containing PUA characters were deliberately
> crafted to investigate using PUA characters in file names.

I suspect a more common case is file names containing end-user defined
characters.

> What Far-East multi-byte encoding uses PUA characters,
> and for what characters?

Pretty much all of them near as I can tell.  See the following WWW page
for a discusion of this issue:

   http://www.opengroup.or.jp/jvc/cde/ucs-conv-e.html

> On no operating system I'm aware of can you pass "Unicode strings" to
> open() or stat().

*sigh*  I was refering to the Python functions "open() and stat() etc."
just as you had in paragraph I copied those exact words from.

> > On Windows you can use GetVolumeInformation()...
>
> On Windows, the entire issue doesn't exist:

On Windows, I think you should use GetVolumeInformation() to decide
whether or not os.listdir() returns Unicode or byte strings, rather
than the type of the argument.

>> ... but then the Python docs suggests this
> > os.listdir() Unicode feature doesn't work on Macintosh systems anyways.
>
> Either the docs are wrong, or you are misinterpreting them. It works
> just fine in practice.

As the original poster in this thread wrote, the docs say:

   On Windows NT/2k/XP and Unix, if path is a Unicode
   object, the result will be a list of Unicode objects

The implication being that Macintosh systems don't support this
feature.

> > That's the problem here, there's no
> > encoding associated Unix filenames, they're just byte strings.
>
> Can you please quote chapter and verse of the POSIX spec that says
> so?

I said Unix, not POSIX.  In practice, Unix systems don't associate an
encoding with filenames, and any byte value other than '/' or '\0' is
permitted in a filename.  Not that it really matters, Python byte
strings are also the natural way to respresent file names stored in a
unspecified encoding.

                                            Ross Ridge



From python at rcn.com  Tue Nov 14 15:16:09 2006
From: python at rcn.com (Raymond Hettinger)
Date: 14 Nov 2006 12:16:09 -0800
Subject: multi split function taking delimiter list
In-Reply-To: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
Message-ID: <1163535369.374279.15350@f16g2000cwb.googlegroups.com>


martinskou at gmail.com wrote:
> Hi, I'm looking for something like:
>
> multi_split( 'a:=b+c' , [':=','+'] )
>
> returning:
> ['a', ':=', 'b', '+', 'c']
>
> whats the python way to achieve this, preferably without regexp?

I think regexps are likely the right way to do this kind of
tokenization.

The string split() method doesn't return the split value so that is
less than helpful for your application:   'a=b'.split()  -->  ['a',
'b']

The new str.partition() method will return the split value and is
suitable for successive applications:  'a:=b+c'.partition(':=')  -->
('a', ':=', 'b+c')

FWIW, when someone actually does want something that behaves like
str.split() but with multiple split values, one approach is to replace
each of the possible splitters with a single splitter:

def multi_split(s, splitters):
    first = splitters[0]
    for splitter in splitters:
        s = s.replace(splitter, first)
    return s.split(first)

print multi_split( 'a:=b+c' , [':=','+'] ) 


Raymond



From XX.XmcX at XX.XmclaveauX.com  Fri Nov  3 14:47:08 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 03 Nov 2006 20:47:08 +0100
Subject: Javascript is turning into Python?!
References: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
	<1162540289.138892.206990@b28g2000cwb.googlegroups.com>
Message-ID: <mn.1cdf7d6b885f2023.46195@XX.XmclaveauX.com>

Hi!

> (ECMAscript), then, well I haven't seen any progress there.

1) in IE-7, the last release (of JScript) has few evolutions (more 
important, a new garbage collector)

2) in Windows, with Active-Scripting, it's possible to integrate 
JScript in Python, call JScript's functions from Python's code, call 
Python's functions from JScript's code, etc.

-- 
@-salutations

Michel Claveau




From jgodoy at gmail.com  Mon Nov  6 05:29:49 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 06 Nov 2006 08:29:49 -0200
Subject: Python Distilled
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<pan.2006.11.06.10.11.35.335058@gmx.net>
Message-ID: <87vels3m1u.fsf@gmail.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:

> In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
> wrote:
>
>> I'd also like to remove any deprecated or stuff which is left in for
>> backwards functionality (eg Classic classes).
>
> Classic classes are still needed for exceptions:
>
>>>> class E(object):
> ...    pass
> ...
>>>> raise E
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: exceptions must be classes, instances, or strings (deprecated),
> not type

On the other hand...

>>> import exceptions
>>> class E(exceptions.Exception):
...     pass
... 
>>> raise E
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
__main__.E
>>> 


This also has the advantage to let it explicit in the code that E is an
exception. 


-- 
Jorge Godoy      <jgodoy at gmail.com>


From bearophileHUGS at lycos.com  Sat Nov  4 03:43:57 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 4 Nov 2006 00:43:57 -0800
Subject: Defaultdict and speed
In-Reply-To: <1162616241.354248.70220@f16g2000cwb.googlegroups.com>
References: <1162542563.386682.3090@b28g2000cwb.googlegroups.com>
	<1162616241.354248.70220@f16g2000cwb.googlegroups.com>
Message-ID: <1162629837.024248.94910@h54g2000cwb.googlegroups.com>

Klaas wrote:
> Benchmarks?

There is one (fixed in a succesive post) in the original thread I was
referring to:
http://groups.google.com/group/it.comp.lang.python/browse_thread/thread/aff60c644969f9b/
If you want I can give more of them (and a bit less silly, with strings
too, etc).

def ddict(n):
    t = clock()
    d = defaultdict(int)
    for i in xrange(n):
        d[i] += 1
    print round(clock()-t, 2)

def ndict(n):
    t = clock()
    d = {}
    for i in xrange(n):
        if i in d:
            d[i] += 1
        else:
            d[i] = 1
    print round(clock()-t, 2)

ddict(300000)
ndict(300000)


> (and slowing down other uses of the class)

All it has to do is to cheek if the default_factory is an int, it's
just an "if" done only once, so I don't think it slows down the other
cases significantly.


> especially when the faster alternative is so easy to code.

The faster alternative is easy to create, but the best faster
alternative can't be coded, because if you code it in Python you need
two hash accesses, while the defaultdict can require only one of them:

if n in d:
    d[n] += 1
else:
    d[n] = 1


>If that performance difference matters,

With Python it's usually difficult to tell if some performance
difference matters. Probably in some programs it may matter, but in
most other programs it doesn't matter. This is probably true for all
the performance tweaks I may invent in the future too.


> you would likely find more fruitful
> gains in coding it in c, using PyDict_SET

I've just started creating a C lib for related purposes, I'd like to
show it to you all on c.l.p, but first I have to find a place to put it
on :-) (It's not easy to find a suitable place, it's a python + c +
pyd, and it's mostly an exercise).

Bye,
bearophile



From guettli.usenet at thomas-guettler.de  Mon Nov 20 11:34:30 2006
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 20 Nov 2006 16:34:30 GMT
Subject: OODB vs RDBMS
Message-ID: <4se3omFv6reaU1@mid.individual.net>

Hi,

most of the time I use ZODB/Durus to store my data. 

I like it, but I know that it has some weaknesses:
- only accesible from python
- I need to code your indexes for fast searching yourself.

I think about using a RDBMS for the next project. What I don't like
about RDBMS: If you need a list of values you need to create a new
table. Example: If you want to store several email addresses of one
customer, you need to create a new table.

Since the namespace if tablenames is flat, you soon have so many
tables, that it is hard to browse them.

Postgres has extensions which allows you to store arrays in a column. Is
this supported by the python binding? Are there other databases which
support this?

Are there OR-mappers (object relational mappers) which support lists in
a column?

How is the unicode support of the python bindings to RDBMSs? I don't
want to convert the results of a query to unicode myself.
Can you insert unicode strings into a SELECT statement?

Which database supports fulltext searches with a customized word
normalization? (All should be the same: str. str stra?e, strasse)

Which OR-mapper do you suggest?
Are there OR-mappers which support this: Subobjects are
fetched automatically while you access the object tree?
Example: One customer has N TroubleTicketItems:
customerobj=get_customer(...)  # First SELECT
for ticket in customerobj.tickets:  # (*)
    ...

(*) Second SELECT gets executed only if needed.

I now this message is vague, but maybe we can discuss the
pros/cons of "OODB vs RDBMS"

 Thomas


-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From samgurung at gmail.com  Tue Nov 28 04:32:34 2006
From: samgurung at gmail.com (linuxfreak)
Date: 28 Nov 2006 01:32:34 -0800
Subject: Libgmail
In-Reply-To: <kaTah.74$TE1.10@read3.inet.fi>
References: <1164703460.303062.58620@80g2000cwy.googlegroups.com>
	<kaTah.74$TE1.10@read3.inet.fi>
Message-ID: <1164706353.955200.128330@l39g2000cwd.googlegroups.com>

Funny enough I find the same "Google" in my browser too. and if my
memory serves me correct I did the same search which you allude to. It
is only after series of exhaustive searches rummaging through websites
with incomplete (or non existent ) docs  that i posed the question
here.... :) thanks for the suggestion anyway....


Jussi Salmela wrote:
> linuxfreak wrote:
> > hi guys,
> >
> > just starting out on python and libgmail... any documentation for
> > libgmail outthere... basically what i want to do is develop an
> > application to use gmail like and ftp server... should be able to
> > upload files and download them as well....
> >
> > thanks
> >
>
> My browser has this amazing thing called Google installed. It's a kind
> of search facility with which I can search through Internet to find
> information.
>
> By searching for libgmail it gives me about 158000 places to read
> through but if I were you I'd start at the top which is
> 	libgmail.sourceforge.net
> 
> HTH,
> Jussi



From vito.detullio at gmail.com  Mon Nov 13 15:11:24 2006
From: vito.detullio at gmail.com (ZeD)
Date: Mon, 13 Nov 2006 20:11:24 GMT
Subject: tab compleation input
References: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>
Message-ID: <Mj46h.41488$Fk1.81270@twister2.libero.it>

Eli Criffield wrote:

> Here is what i want to do. I have a question in my program, and i want
> to do tab completion for the valid answers.

I think you may "play" width curses library: readline() read... while you
input a "newline", but you need to catch single keys (the "TAB" key,
foremost)

-- 
Under construction


From gagsl-py at yahoo.com.ar  Wed Nov 29 05:31:38 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 07:31:38 -0300
Subject: Small prog question from a newbie: abt variables in a
	function definition
In-Reply-To: <d54274f20611290148w1e3e805fwf618049a6411bfc4@mail.gmail.co
 m>
References: <d54274f20611290148w1e3e805fwf618049a6411bfc4@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061129071220.053c7d90@yahoo.com.ar>

At Wednesday 29/11/2006 06:48, B Shyam Sundar wrote:

>I am a newbie as far as python is concerned ... I am trying to write 
>a code for playing bridge in obj oriented manner ..
>
>Well ... i have this small problem:
>
>class hand:
>     def __init__(self,set_of_cards=[]):
>         self.set_of_cards=set_of_cards
>     card_played_flag =0
>     def play(played_card):
>         for i in self.set_of_cards:
>             if self.set_of_cards[i] == played_card:
>                 self.set_of_cards.remove (played_card)
>      def sort_hand():
>         for i in self.set_of_cards:
>             for j in self.set_of_cards:
>                 if self.set_of_cards[j].face<self.set_of_cards[i].face
>                 self.set_of_cards 
> [j],self.set_of_cards[i]=self.set_of_cards[i],self.set_of_cards[j]
>          for i in self.set_of_cards:
>             for j in self.set_of_cards:
>                 if self.set_of_cards[j].suit<self.set_of_cards[i].suit
> 
>self.set_of_cards[j],self.set_of_cards[i]=self.set_of_cards[i],self.set_of_cards[j]
>
>I have created card as a class with the attributes of suit face so 
>.. card(suit,face)
>
>So my question is this ---
>
>The compiler doesnt recognise that there is self.set_of_cards[j] can 
>be a card. It gives a syntax error.
>Also I have not created any instance of the class (Can that be a problem)

(The compiler knows very few about your cards... Python is a very 
dynamic language, a lot of things happens at runtime)

Without compiling your example, I can see these syntax errors:
1) In Python indentation matters. sort_hand must have the same 
indentation as play (and the other methods).
2) Syntax for the if statement - you need a final ":"
if condition: something
if condition:
     do something
     and do other thing
     and do another thing

>So how do i fix this?
>Also can I specify that the list set_of_cards has only card objects? 
>IF yes how?

Short answer: don't bother. (Yes, you *could* inherit from list and 
restrict the contained items, but it's seldom used).

You don't have to sort manually, this should work: 
set_of_cards.sort(key=lambda card: (card.suit,card.face))

And don't use a mutable initializer in __init__: either use an empty 
tuple () or use None and check for it in the method body:
def __init__(self, set_of_cards=None):
     if set_of_cards is None: set_of_cards=[]
     self.set_of_cards = set_of_cards


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From mike.klaas at gmail.com  Fri Nov 17 00:55:23 2006
From: mike.klaas at gmail.com (Klaas)
Date: 16 Nov 2006 21:55:23 -0800
Subject: dict.reserve and other tricks
In-Reply-To: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>
References: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>
Message-ID: <1163742923.680092.264030@j44g2000cwa.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> I have started doing practice creating C extensions for CPython, so
> here are two ideas I have had, possibly useless.
>
> If you keep adding elements to a CPython dict/set, it periodically
> rebuilds itself. So maybe dict.reserve(n) and a set.reserve(n) methods
> may help, reserving enough (empty) memory for about n *distinct* keys
> the programmer wants to add to the dict/set in a short future. I have
> seen that the the C API of the dicts doesn't allow this, and I don't
> know if this can be implemented modifying the dicts a bit. Do you think
> this may be useful?

It has been proposed before and rejected.  How often is dict creation a
bottleneck in python apps?  I'd guess not often.  Do you know of any
examples

Optimize space use also isn't terribly compelling, as a "tight" dict
can be created from a "loose" dict d using dict(d).

<>
> Most of the times such functions are good enough, but sometimes the
> dicts are big, so to reduce memory used I remove keys in place:
>
> def filterdict(pred, indict):
>   todel = [k for k,v in indict.iteritems() if not pred(k,v)]
>   for key in todel:
>     del indict[key]

<>
> But doing the same thing while iterating on the dict may be faster and
> use even less memory.

Well, you can reduce the memory usage to virtually nothing by using a
generator expression rather than list comprehension.

> This iteration&deletion capability is probably not safe enough to be
> used inside Python programs, but a compiled C module with a function
> that works like that filterdict (and deletes while iterating) may be
> created, and its use is safe from Python programs.

<>

> >The dictionary p should not be mutated during iteration. It is safe (since Python 2.1) to modify the values of the keys as you iterate over the dictionary, but only so long as the set of keys does not change.<
>
> Do you think it may be useful to create to create such C filterdict
> function that deletes while iterating? (To create such function it
> probably has to bypass the CPython dict API).

Such a beast would be fiendish to write, I think.  Remember, arbitrary
python code can be executed by __hash__ and deleting (DECREF) python
objects.

-Mike



From filipwasilewski at gmail.com  Fri Nov  3 06:38:43 2006
From: filipwasilewski at gmail.com (Filip Wasilewski)
Date: 3 Nov 2006 03:38:43 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <1162553923.574732.305190@i42g2000cwa.googlegroups.com>

robert wrote:
> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
>
> Interprocess communication is tedious and out of question, so I thought about simply using a more Python interpreter instances (Py_NewInterpreter) with extra GIL in the same process.
> I expect to be able to directly push around Python Object-Trees between the 2 (or more) interpreters by doing some careful locking.

I don't want to discourage you but what about reference counting/memory
management for shared objects? Doesn't seem fun for me.


Take a look at IPython1 and it's parallel computing capabilities [1,
2]. It is designed to run on multiple systems or a single system with
multiple CPU/multi-core. It's worker interpreters (engines) are loosely
coupled and can utilize several MPI modules, so there is no low-level
messing with GIL. Although it is work in progress it already looks
quite awesome.

[1] http://ipython.scipy.org/moin/Parallel_Computing
[2] http://ipython.scipy.org/moin/Parallel_Computing/Tutorial

fw



From lorenzo at diespammerhethurmans.com  Sun Nov  5 15:49:27 2006
From: lorenzo at diespammerhethurmans.com (Lorenzo Thurman)
Date: Sun, 05 Nov 2006 14:49:27 -0600
Subject: NEWBIE: Script help needed
In-Reply-To: <1162716143.747535.109270@h48g2000cwc.googlegroups.com>
References: <lorenzo-A4D904.14582904112006@hedley.internal.thethurmans.com>
	<1162716143.747535.109270@h48g2000cwc.googlegroups.com>
Message-ID: <obv124-gc8.ln1@Hedley.internal.thethurmans.com>

Thanks for the reply, but I know there is something wrong with the 
command, I'm just not sure how to troubleshoot it. Anyway, I can execute 
all of the commands from the command line, but only 3 fails when run 
from within the script. I'll take a look at the link.


Nick Vatamaniuc wrote:
> If the other commands work but 3) doesn't, it means there is something
> different (wrong?) with the command.
> 
> So try running 3) ,  then one of the other ones and see the difference.
> 
> 
> The getCommandOutput() , I suspect,  just waits for the data from the
> actual command and the command is not returning anything. It could be
> because it just takes way too long (I am not familiar with Gentoo, so
> not sure if emerge world takes 1 second or 24 hours...) or perhaps the
> "emerge -uvp world" stops at some point and is waiting for input (a
> command prompt like "are you sure you want to do this [Y/n]?"
> 
> For more in depth on subprocesses in Python take a look at the
> subprocess module:
> http://docs.python.org/lib/module-subprocess.html
> 
> Hope this helps,
> Nick V.
> 
> 
> 
> Lorenzo wrote:
>> I have this script that I want to use weekly to send me email with
>> information regarding disk space and available upgrades for my system.
>> This script is actually a learning tool for me as I learn Python. The
>> problem I've run into has me stumped and I need some help. What happens
>> is when the script runs it does these things, parses the result and
>> appends that to an html string:
>>
>> 1) checks disk space by using df -t reiserfs
>> 2) runs time emerge --sync
>> 3) runs emerge -uvp world
>> 4) runs emerge -uv --fetchonly world
>>
>> The 'emerge' command is a Gentoo specific one. If I remove step 3),
>> everything else runs just fine, the email is sent and I receive what I
>> expect. But when step 3) is allowed to run, even if its the only command
>> that runs, it hangs somewhere in the function getCommandOutput. If I try
>> and debug the command, it appears to hang on this line:
>> err = child.wait()
>>
>> I suspect a race condition, but I'm not sure how to proceed, can someone
>> lend me a hand. Here is the script I wrote, I got the command
>> getCommandOutput from this site:
>> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52296
>> TIA
>>
>> [code]
>> #!/usr/bin/python
>>
>> ################################
>> ### NEED TO RUN THIS AS ROOT ###
>> ### EMERGE SYNC REQUIRES THIS ###
>> ################################
>> import os, re, smtplib, MimeWriter, mimetools, cStringIO, popen2, fcntl,
>> select, pdb
>>
>> cmd = 'df -t reiserfs'
>> finalList = []
>> theOutput = []
>>
>> text = "This realy should be in HTML"
>>
>>
>> html = "<html>\
>> <head>\
>> <meta http-equiv=\"Content-Type\" content=\"text/html;
>> charset=iso-8859-1\">\
>> </head>\
>> <BODY><BR><font color='green'><em>Disk Utilization on
>> Hedley:</em></font><BR>"
>>
>> out = cStringIO.StringIO()
>> writer = MimeWriter.MimeWriter(out)
>> txtin = cStringIO.StringIO(text)
>>
>>
>> def createhtmlmail (html, text, subject):
>>          """Create a mime-message that will render HTML in popular
>>       MUAs, text in better ones"""
>>    import MimeWriter
>>    import mimetools
>>    import cStringIO
>>
>>    out = cStringIO.StringIO() # output buffer for our message
>>    htmlin = cStringIO.StringIO(html)
>>    txtin = cStringIO.StringIO(text)
>>
>>    writer = MimeWriter.MimeWriter(out)
>>    #
>>    # set up some basic headers... we put subject here
>>    # because smtplib.sendmail expects it to be in the
>>    # message body
>>    #
>>    writer.addheader("Subject", subject)
>>    writer.addheader("MIME-Version", "1.0")
>>
>>    writer.addheader("From", "Hedley at myserver.com")
>>       writer.addheader("To", "lorenzo at myserver.com")
>>    #
>>    # start the multipart section of the message
>>    # multipart/alternative seems to work better
>>    # on some MUAs than multipart/mixed
>>    #
>>    writer.startmultipartbody("alternative")
>>    writer.flushheaders()
>>    #
>>    # the plain text section
>>    #
>>    subpart = writer.nextpart()
>>    subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
>>    pout = subpart.startbody("text/plain", [("charset", 'us-ascii')])
>>    mimetools.encode(txtin, pout, 'quoted-printable')
>>    txtin.close()
>>    #
>>    # start the html subpart of the message
>>    #
>>    subpart = writer.nextpart()
>>    subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
>>    #
>>    # returns us a file-ish object we can write to
>>    #
>>    pout = subpart.startbody("text/html", [("charset", 'us-ascii')])
>>    mimetools.encode(htmlin, pout, 'quoted-printable')
>>    htmlin.close()
>>    #
>>    # Now that we're done, close our writer and
>>    # return the message body
>>    #
>>    writer.lastpart()
>>    msg = out.getvalue()
>>    out.close()
>>    print msg
>>    return msg
>>
>> def makeNonBlocking(fd):
>>     fl = fcntl.fcntl(fd, fcntl.F_GETFL)
>>     try:
>>    fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NDELAY)
>>     except AttributeError:
>>    fcntl.fcntl(fd, fcntl.F_SETFL, fl | fcntl.FNDELAY)
>>
>>
>> def getCommandOutput(command):
>>     theOutput = []
>>     child = popen2.Popen3(command, 1) # capture stdout and stderr from
>> command
>>     child.tochild.close()             # don't need to talk to child
>>     outfile = child.fromchild
>>     outfd = outfile.fileno()
>>     errfile = child.childerr
>>     errfd = errfile.fileno()
>>     makeNonBlocking(outfd)            # don't deadlock!
>>     makeNonBlocking(errfd)
>>     outdata = errdata = ''
>>     outeof = erreof = 0
>>     while 1:
>>    ready = select.select([outfd,errfd],[],[]) # wait for input
>>    if outfd in ready[0]:
>>        outchunk = outfile.read()
>>        if outchunk == '': outeof = 1
>>        outdata = outdata + outchunk
>>    if errfd in ready[0]:
>>        errchunk = errfile.read()
>>        if errchunk == '': erreof = 1
>>        errdata = errdata + errchunk
>>    if outeof and erreof: break
>>    select.select([],[],[],.1) # give a little time for buffers to fill
>>    err = child.wait()
>>     if err != 0:
>>    raise RuntimeError, '%s failed w/ exit code %d\n%s' % (command, err,
>> errdata)
>>     theOutput.append(outdata)
>>     theOutput.append(errdata)
>>     return theOutput
>>
>>
>> #Run df and get the disk info
>> output =  os.popen(cmd)
>>
>> # match two or more spaces, the header line has a sngle
>> # space between the 'Mouted on' field
>> # We need to keep those together
>> # The other spaces are the separation in the field headers
>> # To get the output from df down to just the field headers
>> # and the data, we need to match 2 or more spaces
>> # -1 eliminates the \n at the end of output.
>> # We'll get it back when we write each line to the
>> # mail message, I suspect
>>
>> html += "<font color='blue'>"
>>
>> for lines in output.readlines():
>>
>>    p = re.compile('\ +')
>>    formattedText = p.subn('      ', lines[:-1], 5)
>>    html += formattedText[0] + '<BR>'
>>
>> html += "</font>"
>>
>> mydata = getCommandOutput("time emerge --sync")
>>
>>
>> p = re.compile('\ +')
>> p.subn(' ', mydata[1])[0]
>> p = re.compile('\n')
>> string = (p.subn('<BR>', mydata[1]))[0]
>>
>> html += "<BR><BR><em><font color='green'>Sync Time: " + "<BR>" +
>> "</font></em>" + "<font color='blue'>" + string + "</font>"
>>
>>
>> mydata = ""
>> mydata =  getCommandOutput("emerge -uvp world")
>>
>> p = re.compile('\ +')
>> (p.subn(' ', mydata[0]))[0]
>> p = re.compile('\n')
>> html += "<font color='blue'>" + (p.subn('<BR>', mydata[0]))[0] +
>> "</font>"
>>
>>
>>
>> try:
>>    getCommandOutput('emerge -uv --fetchonly world')
>>    html += "<font color='Green'><em><BR>Fetch completed
>> successfuly!</em></font>"
>> except RuntimeError:
>>       html += "< font color='Red'><BR>******Fetch did not complete
>> successfully!*********</font>"
>>
>> html+= '</BODY> </HTML>'
>>
>> out = cStringIO.StringIO()
>> writer = MimeWriter.MimeWriter(out)
>> txtin = cStringIO.StringIO("This should be in HTML")
>> subject = "Emerge info and disk utilization on Hedley"
>> message = createhtmlmail(html, text, subject)
>> server = smtplib.SMTP("hedley")
>> server.sendmail('Hedley at myserver.com', 'lorenzo at myserver.com', message)
>> server.quit()
>> [/code]
>>
>> --
>> "My Break-Dancing days are over, but there's always the Funky Chicken"
>> --The Full Monty
> 


From python.list at tim.thechases.com  Tue Nov 21 16:45:42 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 21 Nov 2006 15:45:42 -0600
Subject: Is there a list comprehension for this?
In-Reply-To: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
Message-ID: <45637386.3030503@tim.thechases.com>

> dw = [ 1, -1.1, +1.2 ]
> 
> Suppose I want to create a list 'w' that is defined as
> 
> w[0] = dw[0],
> w[1] = w[0] + dw[1],
> w[2] = w[1] + dw[2]
> 
> Is there a list comprehension or map expression to do it in one or 2
> lines.

Well, while it's not terribly efficient, you can do something like

	w = [sum(dw[:i]) for i in xrange(1,len(dw)+1)]

Or, if you need the efficiencies for larger len(dw) values, you 
could do something like

 >>> def f(x):
...     i = 0
...     for item in x:
...             i += item
...             yield i
...
 >>> list(i for i in f(dw))
[1, -0.10000000000000009, 1.0999999999999999]

Just a few ideas,

-tkc





From Laundro at gmail.com  Mon Nov 27 04:12:43 2006
From: Laundro at gmail.com (LaundroMat)
Date: 27 Nov 2006 01:12:43 -0800
Subject: reading id3 tags with python
In-Reply-To: <1164386522.229372.116120@l12g2000cwl.googlegroups.com>
References: <1164328566.089711.89870@l12g2000cwl.googlegroups.com>
	<o9s9h.2927$tM1.1672@newsread1.news.pas.earthlink.net>
	<1164354948.000349.52170@m7g2000cwm.googlegroups.com>
	<1164386522.229372.116120@l12g2000cwl.googlegroups.com>
Message-ID: <1164618762.975659.241520@j72g2000cwa.googlegroups.com>

On Nov 24, 5:42 pm, "jeff" <jeffrey.ayleswo... at gmail.com> wrote:
[snip]
> and what do you mean by 'id3reader' cant do directories?
> my for loop just does each file in the dirextory

It's just a friendly warning that you shouldn't suppose that all that
is scanned are indeed files, and not directories.



From boney.dalwani at gmail.com  Tue Nov 14 05:25:37 2006
From: boney.dalwani at gmail.com (boney)
Date: 14 Nov 2006 02:25:37 -0800
Subject: mod_python installation problem ..severity High
Message-ID: <1163499937.692984.101720@h48g2000cwc.googlegroups.com>

hello All,

I am totally unknown to python language..

i need to install mod_python to embed python interpreter with the
Apache server, in order to use Trac with Apache Web Server

i am using :

Python 2.4.3,
apache 2.0.50 for windows,
mod_python-3.2.10.win32-py2.4-apache2.0 (windows installer)

after installing the packages i added the following lines to the
httpd.conf file :

  LoadModule python_module modules/mod_python.so

in order to test mod_python installation i added to following line to
the httpd.conf file

  <Directory "C:/Program Files/Apache Group/Apache2/htdocs/test">
        AddHandler mod_python .py
        PythonHandler mptest
        PythonDebug On
 </Directory>

 within the htdocs/test folder there is mptest.py file with the
following contents

   from mod_python import apache

    def handler(req):
        req.content_type = 'text/plain'
        req.write("Hello World!")
        return apache.OK


On doing this and duly following the installation and testing
instructions at www.modpython.org and then pointing the url as
http://localhost/test/mptest.py, i get the following error on the
server log file:

[Tue Nov 14 15:17:47 2006] [error] make_obcallback: could not import
mod_python.apache.\n
[Tue Nov 14 15:17:47 2006] [error] make_obcallback: Python path being
used "['C:\\\\Program Files\\\\Apache
Group\\\\Apache2\\\\bin\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
'.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk', 'C:\\\\Program
Files\\\\Apache Group\\\\Apache2\\\\bin']".
[Tue Nov 14 15:17:47 2006] [error] python_handler: no interpreter
callback found.
[Tue Nov 14 15:17:47 2006] [error] [client 127.0.0.1] python_handler:
Can't get/create interpreter.

On one of the forum i got the following feedback regarding this error:-

This one seems to occur on all platforms with similar frequency, and is
usually related
to having python multiple versions on the same system.The solution is
to adjust that PATH apache uses so it finds the correct python version.

But i donot have multiple versions of python installed.

Can anybody give some insight to what can be the problem and hw to
reach to the solution ??

Thanks in Advance

Boney



From pecora at anvil.nrl.navy.mil  Wed Nov 29 15:37:10 2006
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Wed, 29 Nov 2006 15:37:10 -0500
Subject: Good script editor for Python on Mac OS 10.3
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
Message-ID: <pecora-F96D92.15371029112006@ra.nrl.navy.mil>

In article <1164830360.213197.182560 at l12g2000cwl.googlegroups.com>,
 "Scott_Davies" <cloudrider9 at gmail.com> wrote:

> Hi,
> 
> I have an old Mac with OS X Panther installed.  I also have the Python
> language download file, but I haven't got a text/script editor to use
> for it.  Does anyone have a recommendation for a good Python text
> editor in OS 10.3?
> 
> Thanks,
> 
> Scott D.
> 

Try TextWrangler.  It's free.  I use it's big brother BBEdit and like it.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From stefan.behnel-n05pAM at web.de  Thu Nov 23 08:35:42 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 23 Nov 2006 14:35:42 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <Xns9884782092A96toreriknpolarno@129.242.5.222>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <4565A3AE.4030301@web.de>

Tor Erik Soenvisen wrote:
> (len(['']) is 1) == (len(['']) == 1) => True

   >>> len([''])
   1
   >>> len(['']) is 1
   True
   >>> len(['']) == 1
   True
   >>> True == True
   True
   >>> (len(['']) is 1) == (len(['']) == 1)
   True


What did you expect?

Stefan


From __peter__ at web.de  Sun Nov  5 11:50:13 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 05 Nov 2006 17:50:13 +0100
Subject: string to list of numbers conversion
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
	<eikn9p$bbq$01$1@news.t-online.com>
	<1162733359.612568.149870@f16g2000cwb.googlegroups.com>
Message-ID: <eil4nr$d6d$00$1@news.t-online.com>

jm.suresh at no.spam.gmail.com wrote:

> This recipe fails when negative numbers are used.
> 
> safe_eval('(12, -12)')
> *** Unsafe_Source_Error: Line 1.  Unsupported source construct:
> compiler.ast.UnarySub
> 
> But, I think it could  be easily fixed for somebody who understands the
> script. 

I think that somebody could be you.

> Can somebody help. 

Start with

class SafeEval(object):
    # ...
    def visitUnarySub(self, node, **kw):
        return -node.expr.value

and then add some error handling.

Peter



From nszabolcs at gmail.com  Wed Nov 22 04:54:41 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 22 Nov 2006 01:54:41 -0800
Subject: gopherlib deprecated in 2.5
Message-ID: <1164189280.934651.290790@m7g2000cwm.googlegroups.com>

I've just seen that gopherlib is deprecated in python 2.5
http://docs.python.org/lib/module-gopherlib.html

we still use this protocol (though there are only few working gopher
servers are left on the net)

My friend just wrote a standard compliant gopher server (pygopherd had
some problems oslt) and it's much better for hierarchycal content
sharing than the http (which is overrated and misused in this respect).

So i don't really understand why would one remove it from python. It's
a friendly, tiny, simple, standard protocol.

what is the opinion of the comp.lang.python crowd?



From chrispatton at gmail.com  Wed Nov  1 02:03:50 2006
From: chrispatton at gmail.com (Chris)
Date: 31 Oct 2006 23:03:50 -0800
Subject: .pyc's
In-Reply-To: <1162355223.200685.308760@m73g2000cwd.googlegroups.com>
References: <1162354879.039642.195690@k70g2000cwa.googlegroups.com>
	<1162355223.200685.308760@m73g2000cwd.googlegroups.com>
Message-ID: <1162364630.841356.10200@e3g2000cwe.googlegroups.com>

thanks

marijuanated at gmail.com wrote:
> You can try decompyle
>
> http://packages.debian.org/unstable/python/decompyle
> 
> It works only until python version 2.3 though



From timr at probo.com  Fri Nov  3 01:53:26 2006
From: timr at probo.com (Tim Roberts)
Date: Fri, 03 Nov 2006 06:53:26 GMT
Subject: urllib2: HTTP Version not supported
References: <1162471925.780264.315870@f16g2000cwb.googlegroups.com>
Message-ID: <ipplk29d55i9gh0lb7scr23rnm069j1pe9@4ax.com>

"Nirnimesh" <nirnimesh at gmail.com> wrote:
>
>I'm using urllib2 module to fetch a URL from a server which understands
>HTTP/1.1 only (no HTTP/1.0).
>
>urllib2.urlopen() results in "urllib2.HTTPError: HTTP Error 505: HTTP
>Version not supported".
>
>How do I force urllib2 to use HTTP v1.1?

Are you passing httplib.HTTPConnection as the connection handler?  If you
use httplib.HTTP instead, it should create a 1.0 request.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From luismg at gmx.net  Wed Nov 15 00:30:20 2006
From: luismg at gmx.net (=?iso-8859-1?Q?Luis_M._Gonz=E1lez?=)
Date: Wed, 15 Nov 2006 02:30:20 -0300
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163566115.10270.5.camel@enterprise.local.lan>
Message-ID: <001701c70877$27a0f9a0$6e00a8c0@averatecdda041>

>> Yes, php is only for web.
>
> Absolutely false.  Most of my standalone, command-line scripts for
> manipulating my unix users in LDAP are written in PHP, although we're
> rewriting them in python.
>
> Although I can't think of a single app written in php that's not web-
> based (other than standalone scripts I have written), there are up-to-
> date php bindings for GTK: http://gtk.php.net/
>
> Michael

Fair enough, this has been possible due to the enormous popularity of php.
You can also hit a nail with your shoe instead of using a hammer, and if you 
try hard you may even succeed. You can also digg a a grave with a spoon 
instead of a shovel, and after a couple of days you'll be finished.
You may be able to use php to create a stand alone app, but php was created 
with the solely purpose of being a tool for creating dynamic web sites.
And you have to admit that using php for a non-web app is like trying to fit 
a a square into a round hole.
Php is no more than a simplified C-ish language, dynamically typed with a 
lot of functions aimed at web tasks. Without these built-in functions, 
there's little you can do with it in your web apps.
On the otehr hand, you don't need a thousand built-in functions in python 
for achieving every single task on a web site. You just write them, often 
with just a couple of lines, because the language is that flexible an 
consice.
You don't have to remember each and every function for every task, this is 
ridiculuous.

I think that even as a general purpose language, python is still much more 
adecuate, fast, fun and flexible than php for building web apps.

Luis







From ptmcg at austin.rr._bogus_.com  Thu Nov 30 09:27:05 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 30 Nov 2006 14:27:05 GMT
Subject: More elegant to get a name: o.__class__.__name__
References: <z7mdnTF4I_wfefPYnZ2dnUVZ_rCdnZ2d@comcast.com>
Message-ID: <ZSBbh.5960$_H5.3656@tornado.texas.rr.com>

"alf" <ask at me> wrote in message 
news:z7mdnTF4I_wfefPYnZ2dnUVZ_rCdnZ2d at comcast.com...
> Hi,
> is there a more elegant way to get o.__class__.__name__. For instance I 
> would imagine name(o).
>
> -- 
> alf

>>> name = lambda o : o.__class__.__name__
>>> name(1)
'int'

Go for it!

-- Paul 




From draghuram at gmail.com  Fri Nov 10 10:20:24 2006
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 10 Nov 2006 07:20:24 -0800
Subject: Newb: installing Jython on Windows XP ...
References: <1163095323.668867.58320@i42g2000cwa.googlegroups.com>
Message-ID: <1163172024.453732.227340@k70g2000cwa.googlegroups.com>


I haven't installed on cygwin or windows XP myself but you should be
using "java jython-21". Note that there are two class files
"jython-21.class" and "jython_21.class". Also make sure that the
CLASSPATH includes the directory that has these two class files.

Raghu.

donkeyboy wrote:
> All,
>
> I'm having issues installing Jython on Windows XP. I've looked on the
> web and this newsgroup but to no avail. Any suggestions? The shell
> listing is below:
>
> NB I've got Cygwin installed, hence the Unix 'ls' on a Windows box
>
> C:\>cd Jython
>
> C:\Jython>ls
> jython_21.class
>
> C:\Jython>ls "c:\Program Files\Java\jdk1.5.0_09\bin\java.exe"
> c:\Program Files\Java\jdk1.5.0_09\bin\java.exe
>
> C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython_21
> Exception in thread "main" java.lang.NoClassDefFoundError: jython_21
>
> C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython-21
> Exception in thread "main" java.lang.NoClassDefFoundError: jython-21
> 
> Any help would be of great use!!!



From daigno at gmail.com  Tue Nov 14 23:03:22 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Tue, 14 Nov 2006 23:03:22 -0500
Subject: Python development time is faster.
Message-ID: <455A918A.1090208@gmail.com>

"Chris Brat" <chrisBrat at gmail.com> writes:


> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
> 
> Does anyone have any comments on that statement from personal
> experience?

Well ... Asking this question here is kinna like asking a car dealer if the pontiac in the parking is any good ... :-P

> How is this comparison measured?

This is hard to measure objectively as there are a LOT of factors to take into account. 

>From personal experience I found a palpable difference in development speed in favor of Python.  My previous experiences were with C++, Java, C and some other specialized languages such as SQL and the occasional Brainfuck to show students that readability can be a useful concept in a language.

Other than a few irritants that knowledge and enlightenment quickly iron out the hardest part was to rid myself of the blinkers and shackles that years of Java-C++ enslavement brought on me.

Also...

>Harry George wrote :
>   a) Once you get the hang of the language (a weekend?), you can
>   write without reference to the manuals.  

Tho a printed quick reference card nearby is a major time saver.
I found this one to be useful
http://www.limsi.fr/Individu/pointal/python/pqrc/

>Harry George wrote :
>   Or if you do reference, it
>   is a quick lookup.  No struggling to figure out how to code
>   something.  Or to decypher what a line of code actually does.

This is generally true but see below...

>Harry George wrote :   
>c) Peer code reviews are easy -- both you and the reviewers can
>   understand the code's intent at a glance.

Python is completely open and dynamic in nature, this leaves you, the programmer, a *lot* of space for creativity.  However this much space in the wrong hands will picasso listings that can be very cryptic and could be very hard to maintain.

This being said....  after a bit of experience in programming, design patterns and other marvels of the modern brains, doing bad code in python requires a conscious effort to do.  The bright side is that it gives all the justification to reviewers to smack the offenders on the head with a hardcover copy of the GoF.


Anyways, 

my 2 cents

?ric :D.
----

With great power comes great responsibility...





From chris.cavalaria at free.fr  Thu Nov  9 12:33:18 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 09 Nov 2006 18:33:18 +0100
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163092380.301382.113470@m7g2000cwm.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
Message-ID: <45536639$0$23587$426a34cc@news.free.fr>

Dan Lenski a ?crit :
> Nick and John S., thank you for the tip on wxPython!  I'll look into it
> for my next project.  I too would avoid Qt, not because of the GPL but
> simply because I don't use KDE under Linux and because Qt is not well
> supported under Cygwin or on native Windows.
Qt is very well supported under Windows! Avoid spreading lies please ;)


( and I must admit one of the reasons I avoid wx if possible, is because 
I don't use Gnome under Linux and the look and feel of wx applications 
is really horrible under KDE )


From humitos at gmail.com  Tue Nov 21 10:17:30 2006
From: humitos at gmail.com (Manuel Kaufmann)
Date: Tue, 21 Nov 2006 12:17:30 -0300
Subject: Parsing/Splitting Line
In-Reply-To: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
Message-ID: <200611211217.30894.humitos@gmail.com>

El Martes, 21 de Noviembre de 2006 02:59, acatejr at gmail.com escribi?:
> I have a text file and each line is a list of values.  The values are
> not delimited, but every four characters is a value.  How do I get
> python to split this kind of data?  Thanks.

You can define a function very easy to make it. For example you can do:

# split-line in 'n' characters
import sys

def splitLine(line, n):
    """split line in 'n' characters"""
    x = 0
    y = 0
    while line >= n:
    	y = x + n
        if line[x:y] == '':
            break
        yield line[x:y]
        x += n

if __name__ == '__main__':
    # i get the line-split from the command line
    # but you can get it from a file
    for x in splitLine(sys.argv[1], int(sys.argv[2])):
        print x



-- 
Kaufmann Manuel


From odalrick at hotmail.com  Thu Nov  2 07:11:36 2006
From: odalrick at hotmail.com (Odalrick)
Date: 2 Nov 2006 04:11:36 -0800
Subject: Image creation
Message-ID: <1162469496.224218.127540@k70g2000cwa.googlegroups.com>

I need to generate wx.Bitmap with a hole in them, i.e. the whole bitmap
is one colour, greyish with alpha = 255*.6, except for one rectangle
that has alpha = 0 .

Currently I'm doing this with PIL, thus:

	def _init_mask( self ):
		mask = Image.new( 'RGBA', self.size, color=options['mask_colour'] )
		draw = ImageDraw.Draw( mask )
		draw.rectangle( self.clip_area.box, fill=( 255, 255, 255, 0) )
		self._mask = pilToBitmap( mask, alpha=True )

Obviously this is inefficient, but I couldn't find any way to give
alpha values with wxPython's image objects and premature optimization
etcetera... Well, now the program works, but is a bit sluggish so I'm
asking if anyone can give me some pointers to speeding this up.

/Odalrick



From rrr at ronadam.com  Fri Nov 10 14:01:06 2006
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 10 Nov 2006 13:01:06 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4554AAB4.10002@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
Message-ID: <ej2igj$826$1@sea.gmane.org>

Michael Hobbs wrote:

> The same problem that is solved by not having to type parens around the 
> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
> typing to no good advantage, IMHO. I was coding in Ruby for several 
> months and got very comfortable with just typing the if conditional and 
> hitting return, without any extra syntax. When I came back to Python, I 
> found that I felt annoyed every time I typed the colon, since it 
> obviously isn't required. The FAQ says that the colon increases 
> readability, but I'm skeptical. The indentation seems to provide more 
> than enough of a visual clue as to where the if conditional ends.

I'm not sure why '\'s are required to do multi-line before the colon.  Possibly 
because if multi-line conditional expressions are the norm, dropping a colon 
could result in valid (but incorrect) code instead of an error?

The faq also pointed out a technical reason for requiring the colon.  It makes 
the underlying parser much easier to write and maintain.  This shouldn't be 
taken to lightly in my opinion, because a simpler easer to maintain and more 
reliable python parser means development time can be spent improving the 
language in other areas instead of fixing parsing problems every time a new 
feature is added that might be used in a conditional expression.

Cheers,
    Ron












From Norbert.Klamann at projecthome.de  Thu Nov 30 11:26:22 2006
From: Norbert.Klamann at projecthome.de (Norbert)
Date: 30 Nov 2006 08:26:22 -0800
Subject: EasyInstall under Windows - strange behaviour
Message-ID: <1164903982.201944.46380@l39g2000cwd.googlegroups.com>

Hello all,
i try to install ZSI under python 2.5 and windows 2000.
I Downloaded the egg and tried the following

c:\Python25\Scripts>easy_install.exe c:\download\ZSI-2.0_rc3-py2.5.egg

The result is that pythonwin pops up and shows the file :
c:\Python25\Scripts\easy_install-script.py :
----------------------------
!C:\Python25\Lib\site-packages\pythonwin\Pythonwin.exe
# EASY-INSTALL-ENTRY-SCRIPT:
'setuptools==0.6c3','console_scripts','easy_install'
__requires__ = 'setuptools==0.6c3'
import sys
from pkg_resources import load_entry_point

sys.exit(
   load_entry_point('setuptools==0.6c3', 'console_scripts',
'easy_install')()
)
----------------------------

What is going on here ?
I presume that there are some trivial things I don't understand, can
someone provide apointer or hint ?

Thank you for your time !

Norbert



From hg at nospam.com  Fri Nov 24 12:26:59 2006
From: hg at nospam.com (hg)
Date: Fri, 24 Nov 2006 11:26:59 -0600
Subject: Active State and Komodo...
In-Reply-To: <pan.2006.11.24.15.56.30.157992@creativewebnet.com>
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
	<1164380976.218515.107780@m7g2000cwm.googlegroups.com>
	<pan.2006.11.24.15.56.30.157992@creativewebnet.com>
Message-ID: <d0G9h.2110$6g5.1020@newsfe22.lga>

Steve Thompson wrote:
> On Fri, 24 Nov 2006 07:09:36 -0800, BartlebyScrivener wrote:
> 
>> Steve Thompson wrote:
>>> I was wondering the differnced there were betwee Active State's python and
>>> the open source version of python.
>> The biggest difference at the moment is that ActiveState is still using
>> Python 2.4.3 in their distribution. They should be coming out with 2.5
>> soon.
>>
>> Sounds like you are running Suse?  So you already have some version of
>> Python, right? You can search this group at comp.lang.python on Google
>> Groups--try "python versions linux"--or something like that--but the
>> issue you need to watch out for is running two different versions on
>> Linux.
>>
>> Long and short, you don't want to uninstall the version of Python that
>> came with your Suse, because other programs on your machine probably
>> use that particular version. It's easy to install an ADDITIONAL
>> distribution of Python and run it separately, but again. Search the
>> list
>> for how to do that, and how to run them separately once you do.
>>
>> I'm just moving to Linux myself, so can't provide the expertise. Unless
>> there is some killer feature of 2.5 you need, I would just use the
>> Python that came with your Suse.
>>
>> rd
> 
> Thanks BartlebyScrivener, but are there any other IDE's that are better,
> in your opinion, than Eric version 3. I'm using gnome and eric is built
> for KDE. I don't care it there open source or Id I have tp puchase one.
> 
> Thanks again,
> 
> Steve
I like Eclipse/Pydev better

hg


From deets at nospam.web.de  Wed Nov  1 10:45:13 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 01 Nov 2006 16:45:13 +0100
Subject: Remote Objects via CGI?
References: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>
Message-ID: <4qrto9FnvnaqU1@uni-berlin.de>

kpd wrote:

> Three are lots of good looking remote-object implementations for Python
> such as Pyro, Rpyc, and PyInvoke.    All of these require a deamon
> running to serve the remote objects.
> 
> Has anyone seen a method of doing this using CGI or FastCGI instead of
> a deamon?   I'm not worried about performance for this application, but
> I do have constraints on long-running processes.

This is pretty much a contradiction to what pyro (the others I don't know,
but I bet they are similar) does: serve requests from in-memory living
stateful objects.

CGI on the other hand will spawn a new process for each request, discarding
quite a few aspects. You'd have to re-instantiate the serving objects for
each request, if you want to keep the statefulness, you have to persist
state between requests and ensure there is some session state communicated.

All in all, it can't be done so easily as by only adapting an existing
RPC-solution, but you rather should roll out your own. Or stick with what
is available, like XMLRPC

Diez


From mail at microcorp.co.za  Fri Nov 17 08:57:04 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 15:57:04 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <001501c70a50$440b4840$03000080@hendrik>

"Stephan Kuhagen" <nospam at domain.tld> wrote:


> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. All those limits are managed by the interpreter for script code
> and hence can be limited for untrusted code by the interpreter. This also
> does not really make DoS impossible (what about C extensions? - maybe
> restricting "import"?). - As I said before in this thread, making a sandbox
> really secure is a hard job, and may need some serious changes in the
> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
> to have.

I seem to recall previous discussion on this group about a thing called the
bastion module,
and that it was deprecated.  Not sure if it has any relevance.

- Hendrik





From notejam at sbcglobal.net  Thu Nov 23 14:36:16 2006
From: notejam at sbcglobal.net (notejam)
Date: 23 Nov 2006 11:36:16 -0800
Subject: Python 2.5 idle and print command  How do I suppress a line feed?
Message-ID: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>

Hi,
I am having a problem with print statements always cause a line feed.
I need to print a line of text, then the next print statement will
start printing where the last one stopped rather than drop down a line.

In basic we can do this with print "texst";   followed by next command
print "text2"
So how do I do that in python?



From steve at REMOVE.THIS.cybersource.com.au  Mon Nov  6 06:00:28 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 06 Nov 2006 22:00:28 +1100
Subject: forwarding *arg parameter
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
	<eilc3m$301a$1@ulysses.news.tiscali.de>
	<y2r3h.244$7b6.238@read3.inet.fi>
Message-ID: <pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>

On Sun, 05 Nov 2006 19:35:58 +0000, Tuomas wrote:

> Thanks. My solution became:
> 
>  >>> def flattern(arg):
> ...     result = []
> ...     for item in arg:
> ...         if isinstance(item, (list, tuple)):
> ...             result.extend(flattern(item))
> ...         else:
> ...             result.append(item)
> ...     return tuple(result)
> ...
>  >>> def g(*arg):
> ...     arg = flattern(arg)
> ...     return arg
> ...
>  >>> def f(*arg):
> ...     return g(arg)
> ...
>  >>> f('foo', 'bar')
> ('foo', 'bar')


That's the most complicated do-nothing function I've ever seen. Here is a
shorter version:

def shortf(*args):
    return args


>>> f('foo', 'bar')
('foo', 'bar')
>>> shortf('foo', 'bar')
('foo', 'bar')

>>> f(1,2,3,4)
(1, 2, 3, 4)
>>> shortf(1,2,3,4)
(1, 2, 3, 4)

>>> f({}, None, 1, -1.2, "hello world")
({}, None, 1, -1.2, 'hello world')
>>> shortf({}, None, 1, -1.2, "hello world")
({}, None, 1, -1.2, 'hello world')

Actually, they aren't *quite* identical: your function rips lists apart,
which is probably not a good idea.

>>> f("foo", [1,2,3], None) # three arguments turns into five
('foo', 1, 2, 3, None)
>>> shortf("foo", [1,2,3], None) # three arguments stays three
('foo', [1, 2, 3], None)



I still don't understand why you are doing this. Can we have an example of
why you think you need to do this?



-- 
Steven.



From deets at nospam.web.de  Thu Nov 30 18:14:22 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 01 Dec 2006 00:14:22 +0100
Subject: Is there a reason not to do this?
In-Reply-To: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>
References: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>
Message-ID: <4t96ujF134nv7U1@mid.uni-berlin.de>

Ron Garret schrieb:
> One of the things I find annoying about Python is that when you make a 
> change to a method definition that change is not reflected in existing 
> instances of a class (because you're really defining a new class when 
> you reload a class definition, not actually redefining it).  So I came 
> up with this programming style:
> 
> def defmethod(cls):
>   return lambda (func): type.__setattr__(cls, func.func_name, func)
> 
> class c1(object): pass
> 
> @defmethod(c1)
> def m1(self, x): ...
> 
> 
> Now if you redefine m1, existing instances of c1 will see the change.
> 
> My question is: is there a reason not to do this?  Does it screw 
> something up behind the scenes?  Is it unpythonic?  Why isn't this 
> standard operating procedure?

What are you doing that needs this permanent redefinition? I like the 
repl, yet usually - especially when dealing with classes - I write a 
text file containing code. So, i just run that on a command line again, 
if I made some changes, recreating whatever objects I want again.

Even if I'd not do that, but used a long-running interpreter inside an 
IDE (which is what I presume you are doing) - why do you _care_ about 
the old objects the first place? I mean, you obviously changed the 
classes for a reason. So, you are not being productive here, but still 
programming. Which means that you don't _have_ to care about old, 
unchanged objects too much.

But in the end - it's your code. It will run slower, it looks kinda 
weird as someone who's reading it has to know what it is for, but if it 
suits your needs - do it.

Diez


From paddy3118 at netscape.net  Sun Nov 19 01:50:35 2006
From: paddy3118 at netscape.net (Paddy)
Date: 18 Nov 2006 22:50:35 -0800
Subject: basic python questions
In-Reply-To: <1163918698.063535.209970@k70g2000cwa.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<1163917049.387309.150740@e3g2000cwe.googlegroups.com>
	<1163918698.063535.209970@k70g2000cwa.googlegroups.com>
Message-ID: <1163919035.448029.242580@b28g2000cwb.googlegroups.com>


John Machin wrote:


> [Aside] How are you going to explain all this to your instructor, who
> may be reading all this right now?
>

The instructor should be proud!
He has managed to do his very first post to a this newsgroup, about a
homework question, and do it in the right way. that is no mean feat.

- Paddy.



From robert.kern at gmail.com  Mon Nov  6 15:25:54 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 06 Nov 2006 14:25:54 -0600
Subject: building python with utf-8 default encoding?
In-Reply-To: <1162841363.747050.79790@b28g2000cwb.googlegroups.com>
References: <1162841363.747050.79790@b28g2000cwb.googlegroups.com>
Message-ID: <eio5oq$45e$1@sea.gmane.org>

metaperl.etc at gmail.com wrote:
> I am playing around with OpenSwarm and was shocked to see that I cannot
> build Python with default encoding of utf-8 by passing a flag to
> configure... did I miss the option for doing so?

No. The default encoding (the return value of sys.getdefaultencoding()) should
alway be 'ascii'. Otherwise, programs written on one machine will not run on
other machines.

-- 
Robert Kern

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



From bjobrien62 at gmail.com  Wed Nov  1 15:20:36 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 1 Nov 2006 12:20:36 -0800
Subject: scared about refrences...
In-Reply-To: <4547d0d7$0$7246$426a34cc@news.free.fr>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
Message-ID: <1162412436.595926.66940@i42g2000cwa.googlegroups.com>


Bruno Desthuilliers wrote:
> Nick Vatamaniuc a ?crit :
> (snip)
> > In  Python all the primitives are copied and all other entities are
> > references.
>
> Plain wrong. There's no "primitives" (ie : primitive data types) in
> Python, only objects. And they all get passed the same way.

so..
def fn(x):
   x = x + 1
   print x

a = 2
fn(a)
fn(2)

Wouldn't you say that this is being passed by value rather than by
refrence?



From python at greyskies.org  Fri Nov 10 16:31:54 2006
From: python at greyskies.org (Melissa Evans)
Date: Fri, 10 Nov 2006 16:31:54 -0500 (EST)
Subject: Python 2.5 Core Dump on Solaris 8
Message-ID: <20061110162513.T47830@everseek.com>


Hi.  I'm new to Python. :)

I've modified grappy.py, 
http://www.stacken.kth.se/~mattiasa/projects/grappy/, a postfix policy 
daemon for greylisting. to use LDAP as a backend instead of SQL (with 
python-ldap.)  The daemon runs fine when testing but when I put it under 
load it core dumps quickly.  What little analysis I know how to do shows 
similar information every time.  Any advice on where to go from here?

Thanks!
Melissa


Python 2.5 on Solaris 8:

truss:

   write(1, " g r e y l i s t e d :  ".., 82)      = 82
   Action:defer_if_permit Temporary failure
   write(1, " A c t i o n : d e f e r".., 41)      = 41
       Incurred fault #5, FLTACCESS  %pc = 0xFF142794
         siginfo: SIGBUS BUS_ADRALN addr=0x0000000F
       Received signal #10, SIGBUS [default]
         siginfo: SIGBUS BUS_ADRALN addr=0x0000000F
           *** process killed ***

pflags:

core './core' of 12227: python grappy-ldap.py
         data model = _ILP32  flags = PR_RLC
   flttrace = 0xfffffbff
   sigtrace = 0xfffffeff 0xffffffff
   entryset = 0x00000401 0x04000000 0x00000000 0x00000028
              0x80000000 0x00000000 0x00000000 0x00000000
   exitset  = 0xfffffffe 0xffffffff 0xffffffff 0xffffffd7
              0x7fffffff 0xffffffff 0xffffffff 0xffffffff
   /16:  flags = PR_PCINVAL
   sigmask = 0xffffbefc,0x00001fff  cursig = SIGBUS
   /17:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /18:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /19:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /20:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /21:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /1:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /2:   flags = PR_STOPPED|PR_ASLWP
   why = PR_SUSPENDED
   sigmask = 0xffbffeff,0x00001fff
   /3:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /4:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /5:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /6:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /7:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /8:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /9:   flags = PR_STOPPED
   why = PR_SUSPENDED
   /10:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /11:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /12:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /13:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /14:  flags = PR_STOPPED
   why = PR_SUSPENDED
   /15:  flags = PR_STOPPED
   why = PR_SUSPENDED

pstack for the suspicious thread:

core './core' of 12227: python grappy-ldap.py
-----------------  lwp# 16 / thread# 13  --------------------
  ff142794 t_delete (ffffffff, 15df78, fffffffd, 1590f0, 3c4cf0, 4e80) + 
c
  ff14240c realfree (ffffffff, ff1c2858, ff1bc008, 1590f0, 4e83, 1590f8) 
+ d0
  ff142cb0 cleanfree (0, ff1bc008, ff1c27cc, ff1c284c, ff1c281c, 0) + 58
  ff141de4 _malloc_unlocked (10, 0, ff1bc008, 10, 1, 0) + f0
  ff141fec realloc  (ff1c0608, 10, ff1bc008, 4cd80, 10, 0) + 5c
  00040278 app1     (26c788, 264610, 1292ec, 0, 25ddd0, 25dddc) + a4
  00044324 listappend (26c788, 264610, 1291c4, 8, ff1bfc78, 106418) + 8
  0008f1f8 call_function (fe1086a0, 1, 8cc30, 4cd80, 6, 15c45c) + 594
  0008cc38 PyEval_EvalFrameEx (2c9668, 1, 0, 2c9668, 1, 1b00f0) + 2be0
  0008f73c fast_function (1daaf0, 3d7240, 2, 2c9668, 1b00f0, 2639c0) + c4
  0008f5ec call_function (fe108868, 2, 8cc30, 4cd80, 5, 21191c) + 988
  0008cc38 PyEval_EvalFrameEx (3d70e8, 1, 0, 3d70e8, 1, 1b00f0) + 2be0
  0008f73c fast_function (268c30, 2c8dc4, 1, 3d70e8, 1b00f0, 1b00f0) + c4
  0008f5ec call_function (fe108a30, 1, 8cc30, 0, 4, 156ac4) + 988
  0008cc38 PyEval_EvalFrameEx (2c8c78, 0, 0, 2c8c78, 1, 1b00f0) + 2be0
  0008e03c PyEval_EvalCodeEx (1d4a88, 1cc4b0, 0, 2639cc, 4, 0) + 838
  000e2010 function_call (1e0130, 2639c0, 0, e1ed0, 146a98, 14c8e4) + 140
  00025c28 PyObject_Call (1e0130, 2639c0, 0, 2639dc, 3, 2639c0) + 20
  0002e2ac instancemethod_call (1e0130, 2639c0, 0, 2e09c, 1249f8, 26a9ad) 
+ 210
  00025c28 PyObject_Call (26c3a0, 269a58, 0, e2730, 2, 156a5c) + 20
  0008ec2c PyEval_CallObjectWithKeywords (26c3a0, 269a58, 0, 332420, 1, 
1b00f0) + f4
  000290a4 PyInstance_New (269580, 269a58, 0, 28f88, 12462c, 14c8e4) + 
11c
  00025c28 PyObject_Call (2632d0, 269a58, 0, 0, 269a58, 269a64) + 20
  00091ba0 do_call  (2632d0, fe1091a0, ffffffff, 0, 26976c, 269760) + 94
  0008f604 call_function (fe1091a0, 3, 8cc30, 4, 3, 265754) + 9a0
  0008cc38 PyEval_EvalFrameEx (330f98, 3, 0, 330f98, 1, 1b00f0) + 2be0
  0008f73c fast_function (1da1b0, 332570, 3, 330f98, 1b00f0, 332108) + c4
  0008f5ec call_function (fe109368, 3, 8cc30, 0, 2, 156a5c) + 988
  0008cc38 PyEval_EvalFrameEx (332420, 2, 0, 332420, 1, 1b00f0) + 2be0
  0008e03c PyEval_EvalCodeEx (1d4728, 1cc4b0, 0, 26976c, 3, 2c0510) + 838
  000e2010 function_call (1e00b0, 269760, 26ddb0, e1ed0, 146a98, 14c8e4) 
+ 140
  00025c28 PyObject_Call (1e00b0, 269760, 26ddb0, 0, 26976c, 269760) + 20
  0008fe8c ext_do_call (1e00b0, fe109604, 3, ffffffff, 0, 23d4b4) + 3ec
  0008cd30 PyEval_EvalFrameEx (3, 3323d4, 0, 332298, 1, 1b00f0) + 2cd8
  0008f73c fast_function (242f30, 3cd2d4, 1, 332298, 1b00f0, 0) + c4
  0008f5ec call_function (fe1097d0, 1, 8cc30, 0, 0, 2a79f4) + 988
  0008cc38 PyEval_EvalFrameEx (3cd188, 0, 0, 3cd188, 1, 1b00f0) + 2be0
  0008e03c PyEval_EvalCodeEx (23bba8, 2398a0, 0, 25dffc, 1, 0) + 838
  000e2010 function_call (242f70, 25dff0, 0, e1ed0, 146a98, 14c8e4) + 140
  00025c28 PyObject_Call (242f70, 25dff0, 0, ff1c284c, 0, 25dff0) + 20
  0002e2ac instancemethod_call (242f70, 25dff0, 0, 2e09c, 1249f8, 0) + 
210
  00025c28 PyObject_Call (37da08, 150030, 0, 0, 0, 0) + 20
  0008ec2c PyEval_CallObjectWithKeywords (37da08, 150030, 0, 0, 0, 0) + 
f4
  000bdcc0 t_bootstrap (2c08e0, ff09d658, 1, 1, ff09c000, 0) + 1c
  ff08b01c _thread_start (2c08e0, 0, 0, 0, 0, 0) + 40


From dopey483 at gmail.com  Thu Nov  2 09:42:06 2006
From: dopey483 at gmail.com (dopey483 at gmail.com)
Date: 2 Nov 2006 06:42:06 -0800
Subject: Sanity check on use of dictionaries
Message-ID: <1162478526.063884.155320@b28g2000cwb.googlegroups.com>

I am manipulating lots of log files (about 500,000 files and about 30Gb
in total) to get them into a little SQL db. Part of this process is
"normalisation" and creating tables of common data. I am creating
dictionaries for these in a simple {value,key} form.

In terms of memory and performance what are the reasonable limits for a
dictionary with a key and a 16 character string? eg; if I read in one
of my tables from disk into a dictionary, what sizing is comfortable?
100,000 entries? 1,000,000 entries? Lookup times and memory
requirements are my main worries.

(Running Python 2.3.4 on RH Ent, dual-Xeon with 2GB memory)



From grflanagan at yahoo.co.uk  Sun Nov  5 08:05:50 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 5 Nov 2006 05:05:50 -0800
Subject: finding the list of the matched strings
In-Reply-To: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
References: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
Message-ID: <1162731950.686216.84460@m73g2000cwd.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Hi, I have a list of strings. And I want to find the subset which
> matches a particular regular expression.
>
> import re
> ll = ('a', 'b', 's1', 's2', '3s')
> p = re.compile('^s.*')
> newList = filter(lambda s: p.match(s), ll)
>
> I suppose there should be simple function to do this in re module. Is
> there any?
>

#>>> s = ('a', 'b', 's1', 's2', 'c')
#>>> import re
#>>> regexp = re.compile('^s.*')
#>>> filter( regexp.match, s)
#('s1', 's2')
#>>>

Gerard



From no-spam at no-spam-no-spam.invalid  Fri Nov  3 17:31:53 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 23:31:53 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eifuk1$2ks$1@news.sap-ag.de>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net> <eifmgv$r37$1@news.sap-ag.de>
	<eiftcg$968$1@news.albasani.net> <eifuk1$2ks$1@news.sap-ag.de>
Message-ID: <eigg0r$3u7$2@news.albasani.net>

Daniel Dittmar wrote:
> robert wrote:
>> (IPython is only a special "python network terminal" as already said.)
> 
> Sorry, I thought of IronPython, the .NET variant.
> 
>> Does Jython really eliminate the GIL? What happens when different 
> 
> Yes.
> 
>> threads alter/read a dict concurrently - the basic operation in 
>> python, which is usually not protected by locks. Does Jython use a 
>> dict data type (and other collection types) which lock during _each_ 
>> access? in case - that may be very expensive.
> 
> True, though Java synchronization has gotten better and better. Still, 
> Sun introduced non locking hash tables, so it was a problem. It'd be 
> interesting to know which kind of dict is used in Jython for attribute 
> access.

I hate Jave :-) , but to come to concerns of this thread, the speed.
Found not much about.
http://mail.zope.org/pipermail/zpt/2002-March/002884.html
says Jython to be at least 9x slower. Is this still the gap (and constant locking a big factor in this).

IronPython seems to be surprisingly faster than CPython (sometimes): http://www.python.org/pycon/dc2004/papers/9/
But I cannot imagine, that this includes GIL free locking dicts an all ... !?

Is numpy/scipy available for Iron/Jython ?


>> garbage is collected earliest, when the refcount went to 0. If it ever 
>> went to 0, no one will ever use such object again. Thus GC should not 
>> be different at all.
> 
> Since Python 2.?, there's a mark-and-sweep garbage collection in 
> addition to the reference counting scheme. This was put into Python to 
> be able to reclaim object cycles.

still that only walks on objects which have already zero refcount. Cannot imagine any additional problems with the GIL.

robert


From pydecker at gmail.com  Wed Nov  1 09:31:27 2006
From: pydecker at gmail.com (Peter Decker)
Date: Wed, 1 Nov 2006 09:31:27 -0500
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <1162385672.853549.19620@h48g2000cwc.googlegroups.com>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
	<2yt1h.206$1n3.4433@news.tufts.edu>
	<1162242161.009063.65140@e64g2000cwd.googlegroups.com>
	<ZSJ1h.211$1n3.4629@news.tufts.edu>
	<mailman.1573.1162339030.11739.python-list@python.org>
	<1162385672.853549.19620@h48g2000cwc.googlegroups.com>
Message-ID: <ca55a9900611010631m51c97eedq2529023f9d7bb673@mail.gmail.com>

On 1 Nov 2006 04:54:32 -0800, abcd <codecraig at gmail.com> wrote:
> thanks for the feedback, I am watching the screencasts, which are
> helping already.  I think I will try out the Dabo GUI tool since it
> uses wxPython...and see if I can get the code I need from it.

I think you'll be very impressed. Those guys are creating an excellent
tool, and I've found that I can create pretty complicated UIs in a
very, very short time with the Class Designer.

-- 

# p.d.


From ptmcg at austin.rr._bogus_.com  Sun Nov  5 16:39:47 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 05 Nov 2006 21:39:47 GMT
Subject: Awesome Python Information
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
Message-ID: <DSs3h.5716$lx6.4779@tornado.texas.rr.com>

"Brandon" <Lion623 at mail.com> wrote in message 
news:1162753631.297470.315570 at m7g2000cwm.googlegroups.com...
> Check out: www.ChezBrandon.com
>
By which he means, "do NOT waste your time checking out this ridiculous 
website with absolutely no Python whatever anywhere."
(This is the idiot who claims he saved the Congress from some Mossad poison 
gas attack, or whatever.)

-- Paul




From bearophileHUGS at lycos.com  Tue Nov 21 12:17:41 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Nov 2006 09:17:41 -0800
Subject: interleaving dictionary values
In-Reply-To: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
References: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
Message-ID: <1164129461.808479.300060@b28g2000cwb.googlegroups.com>

d = {"a": [1, 2, 3], "b": [4, 5], "c": [7, 8, 9]}

# Simple solution:
result = []
for l in d.itervalues():
    result.extend(l)
print result

# Alternative:
from itertools import chain
print list( chain(*d.itervalues()) )

I don't know what's the faster solution, the first one seem more
readable and it's probably fast enough.

Bye,
bearophile



From fredrik at pythonware.com  Fri Nov 10 15:36:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 21:36:03 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4rk5giFrerjfU1@mid.individual.net>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
Message-ID: <ej2nrk$qea$2@sea.gmane.org>

Bjoern Schliessmann wrote:

> Marc 'BlackJack' Rintsch wrote:
> 
>> No it doesn't -- look again at the example given above.  It's
>> legal syntax in Python but doesn't have the semantics implied by
>> the example.
> 
> Sorry, I don't understand -- what is the difference between the
> example as it is and the implied semantics of it?

 >>> color = "blue"
 >>> if color == "red" or "green" or "yellow":
...     print color, "is red or green or yellow"
...
blue is red or green or yellow

</F>



From sjmachin at lexicon.net  Wed Nov  1 04:51:31 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Nov 2006 01:51:31 -0800
Subject: High level csv reader
In-Reply-To: <tSZ1h.1212$m54.534@newssvr14.news.prodigy.com>
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
	<tSZ1h.1212$m54.534@newssvr14.news.prodigy.com>
Message-ID: <1162374690.950645.246650@b28g2000cwb.googlegroups.com>


James Stroud wrote:
> George Sakkis wrote:
> > It occured to me that most times I read a csv file, I'm often doing
> > from scratch things like assigning labels to columns, mapping fields to
> > the appropriate type, ignoring some fields, changing their order, etc.
> > Before I go on and reinvent the wheel, is there a generic high level
> > wrapper around csv.reader that does all this ?
> >
> > Thanks,
> > George
> >
>
> There is a csv in the standard library. Though many of us don't mind
> answering questions like this, you can get a lot of answers quicker by
> (1) looking to see what's in the standard library and (2) using google.
>
> http://docs.python.org/lib/module-csv.html
>
> James

The OP mentioned "csv.reader".  This indicates to me that he *has* read
the csv docs (have you?), and is *already* using the csv module. The
tasks he says he does often are *not* covered by the standard library.
He appears to be asking if there is a higher-level wrapper around the
standard library.

Please consider reading his question carefully.



From jstroud at mbi.ucla.edu  Sun Nov  5 08:04:19 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 05 Nov 2006 13:04:19 GMT
Subject: Is there a commas-in-between idiom?
In-Reply-To: <eiklvo$5uj$1@hefestos.uned.es>
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <obl3h.22543$TV3.14886@newssvr21.news.prodigy.com>

Ernesto Garc?a Garc?a wrote:
> Hi experts,
> 
> it's very common that I have a list and I want to print it with commas 
> in between. How do I do this in an easy manner, whithout having the 
> annoying comma in the end?
> 
> <code>
> 
> list = [1,2,3,4,5,6]
> 
> # the easy way
> for element in list:
>   print element, ',',
> 
> print
> 
> 
> # this is what I really want. is there some way better?
> if (len(list) > 0):
>   print list[0],
>   for element in list[1:]:
>     print ',', element,
> 
> </code>
> 
> Thx,
> Ernesto

print ",".joint(some_list)

Where what you have named "list" is now called "some_list" because it is 
terribly ill-advised to reassign the name of a built-in type.

James


From gabor at nekomancer.net  Thu Nov 16 19:26:08 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 01:26:08 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <mailman.294.1163721712.32031.python-list@python.org>
References: <mailman.294.1163721712.32031.python-list@python.org>
Message-ID: <18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>

Jean-Paul Calderone wrote:
> On Fri, 17 Nov 2006 00:31:06 +0100, "\"Martin v. L?wis\"" 
> <martin at v.loewis.de> wrote:
>> gabor schrieb:
>>>> All this code will typically work just fine with the current behavior,
>>>> so people typically don't see any problem.
>>>>
>>>
>>> i am sorry, but it will not work. actually this is exactly what i did,
>>> and it did not work. it dies in the os.path.join call, where file_name
>>> is converted into unicode. and python uses 'ascii' as the charset in
>>> such cases. but, because listdir already failed to decode the file_name
>>> with the filesystem-encoding, it usually also fails when tried with
>>> 'ascii'.
>>
>> Ah, right. So yes, it will typically fail immediately - just as you
>> wanted it to do, anyway; the advantage with this failure is that you
>> can also find out what specific file name is causing the problem
>> (whereas when listdir failed completely, you could not easily find
>> out the cause of the failure).
>>
>> How would you propose listdir should behave?
> 
> Umm, just a wild guess, but how about raising an exception which includes
> the name of the file which could not be decoded?
> 

i also recommend this approach.

also, raising an exception goes well with the principle of the least 
surprise imho.

gabor


From fredrik at pythonware.com  Fri Nov 10 15:33:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 21:33:41 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <45538b0d$0$26485$c3e8da3@news.astraweb.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
Message-ID: <ej2nn6$qea$1@sea.gmane.org>

John Salerno wrote:

>> Anyway, the FAQ answer seems to be a 
>> weak argument to me.
> 
> I agree. I was expecting something more technical to justify the colon, 
> not just that it looks better.

yeah, the whole idea of treating programming languages as an interface 
between people and computers is really lame.  no wonder nobody's using 
Python for anything.

</F>



From michael at doubleserver.com  Fri Nov 24 22:01:01 2006
From: michael at doubleserver.com (J. Michael Caine)
Date: Fri, 24 Nov 2006 19:01:01 -0800
Subject: namespace curiosity
In-Reply-To: <7fN9h.3178$tM1.367@newsread1.news.pas.earthlink.net>
References: <mailman.694.1164415771.32031.python-list@python.org>
	<7fN9h.3178$tM1.367@newsread1.news.pas.earthlink.net>
Message-ID: <200611241901.01883.michael@doubleserver.com>

On Friday 24 November 2006 17:45, Dennis Lee Bieber wrote:
> About once a week... It's a FAQ entry!
Wonderful!  Missed that.  Thanks for humoring me.
Very satisfying explanation, too... but what else is one to expect from 
Python? :)


From fredrik at pythonware.com  Mon Nov 13 14:48:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 20:48:49 +0100
Subject: Printing database output in tabular form
In-Reply-To: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
References: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
Message-ID: <ejai70$peg$2@sea.gmane.org>

ronrsr wrote:

> when I try to print a web table containing output from a database, I am
> getting more info than I want- -
> 
> I would like this to print w'o the array('c',

arrays instead of strings?  what database is this, and how is that 
column defined ?

</F>



From sjmachin at lexicon.net  Mon Nov  6 15:49:13 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 12:49:13 -0800
Subject: Unicode/ascii encoding nightmare
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
Message-ID: <1162846153.137536.116970@b28g2000cwb.googlegroups.com>

Thomas W wrote:
> I'm getting really annoyed with python in regards to
> unicode/ascii-encoding problems.
>
> The string below is the encoding of the norwegian word "f?dselsdag".
>
> >>> s = 'f\xc3\x83\xc2\xb8dselsdag'

There is no such thing as "*the* encoding" of any given string.

>
> I stored the string as "f?dselsdag" but somewhere in my code it got
> translated into the mess above and I cannot get the original string
> back.

Somewhere in your code??? Can't you track through your code to see
where it is being changed? Failing that, can't you show us your code so
that we can help you?

I have guessed *what* you got, but *how* you got it boggles the mind:

The effect is the same as (decode from latin1 to Unicode, encode as
utf8) *TWICE*. That's how you change one byte in the original to *FOUR*
bytes in the "mess":

| >>> orig = 'f\xf8dselsdag'
| >>> orig.decode('latin1').encode('utf8')
| 'f\xc3\xb8dselsdag'
| >>>
orig.decode('latin1').encode('utf8').decode('latin1').encode('utf8')
| 'f\xc3\x83\xc2\xb8dselsdag'
| >>>

> It cannot be printed in the console or written a plain text-file.

Incorrect. *Any* string can be printed on the console or written to a
file. What you mean is that when you look at the output, it is not what
you want.

> I've tried to convert it using
>
> >>> s.encode('iso-8859-1')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)

encode is an attribute of unicode objects. If applied to a str object,
the str object is converted to unicode first using the default codec
(typically ascii).

s.encode('iso-8859-1') is effectively
s.decode('ascii').encode('iso-8859-1'), and s.decode('ascii') fails for
the (obvious(?)) reason given.

>
> >>> s.encode('utf-8')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)

Same story as for 'iso-8859-1'

>
> And nothing helps. I cannot remember hacing these problems in earlier
> versions of python

I would be very surprised if you couldn't reproduce your problem on any
2.n version of Python.

> and it's really annoying, even if it's my own fault
> somehow, handling of normal characters like this shouldn't cause this
> much hassle. Searching google for "codec can't decode byte" and
> UnicodeDecodeError etc. produces a bunch of hits so it's obvious I'm
> not alone.
>
> Any hints?

1. Read the Unicode howto: http://www.amk.ca/python/howto/unicode
2. Read the Python documentation on .decode() and .encode() carefully.
3. Show us your code so that we can help you avoid the double
conversion to utf8. Tell us what IDE you are using.
4. Tell us what you are trying to achieve. Note that if all you are
trying to do is read and write text in Norwegian (or any other language
that's representable in iso-8859-1 aka latin1), then you don't have to
do anything special at all in your code-- this is the good old "legacy"
way of doing things universally in vogue before Unicode was invented!

HTH,
John



From john106henry at hotmail.com  Sat Nov 11 15:32:48 2006
From: john106henry at hotmail.com (John Henry)
Date: 11 Nov 2006 12:32:48 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <43hal2p6ep7vds2nl55uqil7v7i3guncl2@4ax.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
	<1163139352.206221.213180@m73g2000cwd.googlegroups.com>
	<1163141290.868726.11330@h48g2000cwc.googlegroups.com>
	<43hal2p6ep7vds2nl55uqil7v7i3guncl2@4ax.com>
Message-ID: <1163277168.079436.65120@e3g2000cwe.googlegroups.com>

BTW: I did a search and found the testnotebook example from:

http://prdownloads.sourceforge.net/pythoncard/testNotebook.zip?download

and tried it out.  There is one error in the widget.py that I have to
get around.  Changed from:

        canvas.setFillColor('gray')

to:

        try:
            canvas.setFillColor('gray')
        except:
            pass

and then ran it.   Works!

So, yes, you can do Notebook in Python.  I believe what they are saying
is that Notebook isn't supported fully (yet) in the resourceeditor.


Bill Maxwell wrote:
> On 9 Nov 2006 22:48:10 -0800, "John Henry" <john106henry at hotmail.com>
> wrote:
>
> >Upon closer look, the walkthrough did say:
> >
> >***************************
> >from PythonCard import model
> >
> >Change that so it says:
> >
> >from PythonCard import dialog, model
> >
> >Save the code.
> >***************************
> >
> >So, it works.
>
>
> Thanks for looking into it.  It sounds like either it has been fixed in
> the newer version -- or I didn't do something correctly.  It's been a
> long time, and I was just going by the notes I made back then.
>
>
>
>
>
>
>
>
>
> >
> >
> >
> >John Henry wrote:
> >> Bill Maxwell wrote:
> >> > On 8 Nov 2006 11:49:07 -0800, "John Henry" <john106henry at hotmail.com>
> >> > wrote:
> >> >
> >> > >
> >> > >John Salerno wrote:
> >> > >> Dan Lenski wrote:
> >> > >>
> >> > >> > So, is there another toolkit I should be looking at?
> >> > >>
> >> > >> I highly recommend wxPython. It's very mature, full-featured, and
> >> > >> portable, and fairly easy to learn as well. I can't really compare it to
> >> > >> other toolkits (not having used any of them, except Tkinter), but it's
> >> > >> definitely one of the most popular and well-supported ones out there.
> >> > >>
> >> > >> http://www.wxpython.org/
> >> > >
> >> > >I highly recommend that you try PythonCard (which sits on top of
> >> > >wxPython).  You can get productive very very quickly.  Take a look at:
> >> > >
> >> > >http://pythoncard.sourceforge.net/walkthrough1.html
> >> >
> >> >
> >> > I took a brief look at PythonCard almost a year ago and got discouraged
> >> > by what I found, so I stopped looking at it.  I've inserted my notes
> >> > from back then, below.  Does anybody know if these things have been
> >> > fixed in the latest release?
> >> >
> >> > Bill
> >> >
> >> >
> >> > =====================================================================
> >> > My notes from Fri Dec-23-2005:
> >> >
> >> > This is a list of gripes I have while trying to learn about PythonCard.
> >> > I'm trying to investigate various GUI builders for Python, and
> >> > PythonCard looks promising, but a lot of things are getting in the way.
> >> >
> >> > I installed yesterday, using this installer:
> >> > PythonCard-0.8.1.FIXED.win32.exe
> >> >
> >> > A)  The very first example in the tutorial is wrong!
> >> >
> >> > 	On this page:  http://pythoncard.sourceforge.net/documentation.html
> >> > 	When you follow this link to try something for the very first time:
> >> >
> >> > 		Getting Started in PythonCard by Dan Shafer:
> >> > 			http://pythoncard.sourceforge.net/walkthrough1.html
> >> >
> >> > 	You quickly see that the minimal.py example doesn't even contain
> >> > this line, even though the tutorial refers to it:
> >> >
> >>
> >> I am not sure which one you are referring to but in the
> >> PythonCard\samples\minimal, you will find a minimal.py that says:
> >>
> >> #!/usr/bin/python
> >>
> >> """
> >> __version__ = "$Revision: 1.8 $"
> >> __date__ = "$Date: 2005/12/17 15:20:02 $"
> >> """
> >>
> >> from PythonCard import model
> >>
> >>
> >> class Minimal(model.Background):
> >>     def on_menuFileAbout_select(self, event):
> >>         pass
> >>
> >> if __name__ == '__main__':
> >>     app = model.Application(Minimal)
> >>     app.MainLoop()
> >>
> >>
> >>
> >> > 		def on_menuFileAbout_select(self, event):
> >> >
> >> > 	And, of course, if you replace the word "pass" with this, as
> >> > instructed:
> >> >
> >> > 		result = dialog.alertDialog(self, 'It works!', 'Showing Off')
> >> >
> >> > 	it won't run, because the existing "pass" line isn't inside a def
> >> > inside of a class.
> >> >
> >>
> >> No, it didn't work because the author forgot to mention that you have
> >> to do a:
> >>
> >> from PythonCard import model, dialog
> >>
> >> instead of just:
> >>
> >> from PythonCard import model
> >>
> >> I just tried it and it works.
> >>
> >> >
> >> > B)  Is the Notebook widget really supported?
> >> >
> >> > 	In the installed file "changelog.txt" (gets installed as part of
> >> > PythonCard installation), it says:
> >> >
> >> > 		"added Notebook component, PageBackground, and testNotebook
> >> >  		sample"
> >> >
> >> > 	But, the testNotebook sample is nowhere to be found.
> >> >
> >>
> >> I haven't come across a need to use Notebook and so I can not say for
> >> sure.  Looking at notebook.py, it appears to be just a simple wrapper
> >> on top of the wxWindow notebook.  I would encourage you to post a
> >> message to the mailing list and ask there.
> >>
> >>
> >> > 	I looked lots of places, including the main SourceForge web site,
> >> > and on the wiki, here:
> >> >
> >> > 		http://wiki.wxpython.org/index.cgi/PythonCard
> >> >
> >> > 	Both the main website and the wiki seem way out of date, and the
> >> > latest dates I could find on both of them are sometime in 2004.
> >> >
> >>
> >> Yes, sometime around 2004, the website updating stopped.   Fortunately,
> >> development didn't.  There are quite a number of new things since then:
> >> new resource editor (now call layout Editor, standalone exe creator,
> >> and so forth).  I even learn that a new sizer handler is in the work.
> >>
> >> Not saying that there are 10 programmers working 7/24 on it.  It *is*
> >> an Open Source project nevertheless.   Nobody gets paid for doing it.
> >>  But there are development work going on.
> >>
> >>
> >> > 	Finally, by following the mailing list archive link on the main
> >> > website, I managed to find a reference to the notebook component on the
> >> > ASPN site, where some guy named Brian wonders about the same thing as
> >> > me, concerning the availability of the notebook component:
> >> >
> >> > 		http://aspn.activestate.com/ASPN/Mail/Message/pythoncard/2536825
> >> >
> >> > 	and, that message led me here:
> >> >
> >> > 		http://article.gmane.org/gmane.comp.python.pythoncard/1060
> >> >
> >> > 	where Kevin Altis admits that he forgot to include it in the 0.8.1
> >> > release!  At least he provides a way to download it separately.  But,
> >> > gheesh, this is pretty poor for a new user.  I was interested in using
> >> > the notebook component right away, because I looked at the wxGlade
> >> > tutorial before looking at PythonPage, and they use the notebook
> >> > component in their example (and I decided I really want to use the
> >> > component).
> >> >
> >> > 	To add insult to injury, after you download the zip file with the
> >> > testNotebook stuff, the readme file says this:
> >> >
> >> > 		"Until we have a Notebook integrated into some of the other
> >> > samples or tools this will serve as a basic test app, but I don't expect
> >> > to include it in releases."
> >> >
> >>
> >>
> >> As with all Open Source projects, your mileage differs.   PythonCard
> >> does what *I* need to get done - and allowed me to get it done in a
> >> *hurry*.  May be you really need Notebook and may be it's true that
> >> Notebook really doesn't work, I don't know.   But if you managed to get
> >> it working, write it up and get it included.  That's what Open Source
> >> Projects are all about.
> >>
> >>
> >> > C)  Are the websites being maintained?
> >>
> >>
> >> It appears that the maintainer of the web site stopped updating it
> >> since late 2004.  I don't know why.   May be he's been busy.  May be he
> >> got mad.  I don't know.   All I know is that I have been very
> >> productive with what I need to get done (and earned a happy living with
> >> the code I created) and I am very grateful to the people that worked on
> >> it - past and present.
> >>
> >> I am not a "professional programmer" and so I probably can't contribute
> >> to the development effort itself.   However, I've gotten pretty good in
> >> using most of the package (other then Notebook, I admit).  So, if you
> >> have any specific questions, please post it to the PythonCard list and
> >> I'll try to help if I can.
> >> 
> >> Cheers.



From jfabiani at yolo.com  Wed Nov 22 11:19:42 2006
From: jfabiani at yolo.com (johnf)
Date: Wed, 22 Nov 2006 08:19:42 -0800
Subject: Python visual IDE
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
Message-ID: <TE_8h.14$b32.7@newsfe02.lga>

king kikapu wrote:

> 
> Hi to all,
> 
> i am not sure if this question really belongs here but anyway, here it
> goes: I have seen a lot of IDEs for Python, a lot of good stuff but
> actually none of them has what, for example, Visual Studio has: a
> Visual Editor (with the  ability to place controls on forms etc etc),
> or RAD
> 
> I know that there is Glade but does anybody knows of some product, or
> an ongoing effort to this direction so i can have a look at ?
> 
> Coming from Windows and vs.net world, i think the only missing point
> here is the integration of the Pyrthon with a RAD IDE...
> 
> Thanks a lot and i apologize if this isn't the correct place for this
> question...
> 
> 
> Kikapu

You might want to check out "dabo" www.dabodev.com. It's only at .7 but it
has a GUI designer (uses wxPython). Has a 3 tier design and able to use
MySQL, Postgres, FireBird, and soon MSSQL. The project has a ways to go but
it's goal is to be similar to windows IDEs such as VFP, VB6 and VS.

John  


From fuzzyman at gmail.com  Tue Nov 21 05:51:09 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Nov 2006 02:51:09 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
Message-ID: <1164106267.882164.124670@h48g2000cwc.googlegroups.com>


tleeuwenburg at gmail.com wrote:
> Greetings all,
>
> Some of you may have noticed the launch of the Python Journal a while
> back. Due to artistic differences, the journal has now been re-launched
> as The Python Papers. It is available under a Creative Commons License,
> something we felt was appropriate given its nature. Many here commented
> that this was important to them, and it is important to us also.
>
> For a fuller description of what we hope the journal to be, I re-create
> my inaugural blog posting at the end of this email, or it can be found
> online here: http://pythonpapers.cgpublisher.com/diary
>
> Some of you had a number of specific points to raise, which I can now
> answer properly since launching under our own banner.
> [snip..]
>
> 3.) Can I have an HTML version?
> A) No, we like it pretty.
>

Congratulations - it looks very professional.

*But*, PDF is an abhorrent format unless you expect people to print it.

Your download system almost certainly guarantees that the content won't
be indexed by search  engines and so is much less likely t obe found by
people who will find it interesting and useful.

:-)

Make sure annnouncements make their way onto PlanetPython (if they're
not already..).

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From timothy at open-networks.net  Sat Nov  4 18:12:32 2006
From: timothy at open-networks.net (timmy)
Date: Sun, 05 Nov 2006 09:12:32 +1000
Subject: py2exe questions
In-Reply-To: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
Message-ID: <454d1dee$1@quokka.wn.com.au>

Doug Stell wrote:
> I have 2 questions about py2exe or any similar utility.
> 
> 1. Is it possible to create a single Windows executable that does not
> blow out to a folder full of files and can be called from scripts
> using command line arguments?
py2exe can most certainly do this.
> 
> 2. If the above can be done, it is possible to hide parts of the
> Python source code from users? These users are software developers,
> but we don't want them to see how the code does what it does.
> 
> thanks, doug
you can make a single exe in py2exe which would make it harder to 
disassemble, but there's no such thing in the software world that makes 
it impossible.



From sjmachin at lexicon.net  Thu Nov 16 06:26:51 2006
From: sjmachin at lexicon.net (John Machin)
Date: 16 Nov 2006 03:26:51 -0800
Subject: split CSV fields
In-Reply-To: <mailman.247.1163676164.32031.python-list@python.org>
References: <ejhduq$l5l$1@news.albasani.net>
	<mailman.238.1163673019.32031.python-list@python.org>
	<1163674830.440318.246920@f16g2000cwb.googlegroups.com>
	<1163675506.590469.251910@h48g2000cwc.googlegroups.com>
	<mailman.247.1163676164.32031.python-list@python.org>
Message-ID: <1163676411.121177.302160@h48g2000cwc.googlegroups.com>


Fredrik Lundh wrote:
> John Machin wrote:
>
> > Given Peter Otten's post, looks like
> > (1) there's a bug in the "fmtparam" mechanism -- it's ignoring the
> > escapechar in my first twiddle, which should give the same result as
> > Peter's.
> > (2)
> > | >>> csv.excel.doublequote
> > True
> > According to my reading of the docs:
> > """
> > doublequote
> > Controls how instances of quotechar appearing inside a field should be
> > themselves be quoted. When True, the character is doubled. When False,
> > the escapechar is used as a prefix to the quotechar. It defaults to
> > True.
> > """
> > Peter's example should not have worked.
>
> the documentation also mentions a "quoting" parameter that "controls
> when quotes should be generated by the writer and recognised by the
> reader.".  not sure how that changes things.

Hi Fredrik, I read that carefully -- "quoting" appears to have no
effect in this situation.

>
> anyway, it's either unclear documentation or a bug in the code.  better
> submit a bug report so someone can fix one of them.

Tomorrow :-)
Cheers,
John



From cdroulers at hotmail.com  Wed Nov  8 22:29:22 2006
From: cdroulers at hotmail.com (Sefyroth)
Date: 8 Nov 2006 19:29:22 -0800
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <n2t924-frs.ln1@eskimo.tundraware.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
	<n2t924-frs.ln1@eskimo.tundraware.com>
Message-ID: <1163042962.854488.296190@b28g2000cwb.googlegroups.com>

Thank you!!! I have had problems with other stuff because of this
(mainly py2exe!)

It did the job! I thank you a lot.

Just wondering though,

D:/Travaux/5?me session/B51 - Dev. de
Syst?mes/Workspace/LMAOSoft/Controleur.py
That's my filepath, what is not ASCII in there? ?????

Just checked and it's 138 in ascii... Anyway, thanks a lot

Christian


Tim Daneliuk wrote:
> Sefyroth wrote:
> > Thanks,
> >
> > but I get this error when I try this.
> >
> > UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
> > position 12: ordinal not in range(128)
> >
> >  I had encountered it with the askdirectory method as well. Is there an
> > easy way to bypass this?
> >
> > Thanks again
>
> I believe you are running into a directory or file name that has
> non-ascii characters in it.  Python as shipped is set up to
> deal with ascii as its native encoding format.  You can change
> this by editing the "site.py" file - look in the Lib directory
> in your python installation.  Look for this code:
>
> -------------------------------
> def setencoding():
>      """Set the string encoding used by the Unicode implementation.  The
>      default is 'ascii', but if you're willing to experiment, you can
>      change this."""
>      encoding = "ascii" # Default value set by _PyUnicode_Init()
>      if 0:
>          # Enable to support locale aware default string encodings.
>          import locale
>          loc = locale.getdefaultlocale()
>          if loc[1]:
>              encoding = loc[1]
> -------------------------------
>
>
>
> Change the "if 0:" to "if 1:" and see if that doesn't fix the problem.
>
>
>
> --
> ----------------------------------------------------------------------------
> Tim Daneliuk     tundra at tundraware.com
> PGP Key:         http://www.tundraware.com/PGP/



From bignose+hates-spam at benfinney.id.au  Wed Nov  1 09:44:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Nov 2006 01:44:25 +1100
Subject: best way to check if a file exists?
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
	<mailman.1597.1162389697.11739.python-list@python.org>
	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>
Message-ID: <8764dz5ira.fsf@benfinney.id.au>

"wittempj at hotmail.com" <martin.witte at gmail.com> writes:

> Ben Finney wrote:
> > "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
> > > You could try to read the file, if that fails it doesn't exist:
> >
> > Except that there are other conditions than "File doesn't exist"
> > that can cause an 'open' to fail.
>
> Ok, true. You can test explicit on non existence as follows, and then
> decide to open the file

Or you can simply use 'os.path.exists', as has been suggested several
times in this thread.

-- 
 \      "The way to build large Python applications is to componentize |
  `\          and loosely-couple the hell out of everything."  -- Aahz |
_o__)                                                                  |
Ben Finney



From claird at lairds.us  Thu Nov 30 18:28:25 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 30 Nov 2006 23:28:25 +0000
Subject: Ruby/Python/REXX as a MUCK scripting language
References: <2006112418112116807-zobeid@techiecom>
	<4sr3neF111j0gU1@mid.individual.net>
	<ekel45$351$1@upsn250.cri.u-psud.fr>
Message-ID: <p16444-9js.ln1@lairds.us>

In article <ekel45$351$1 at upsn250.cri.u-psud.fr>,
Laurent Pointal  <laurent.pointal at limsi.fr> wrote:
>Fred Bayer a ?crit :
>> 
>> Tony Belding wrote:
>>> I'm interested in using an off-the-shelf interpreted language as a
>>> user-accessible scripting language for a MUCK.  I'm just not sure if I
			.
			.
			.
>>> there's the security issue that really worries me. . .  I have to be
>>> able to limit what the interpreter can execute.  I can't have my users
>>> running scripts that access the console, access the filesystem or
>>> sockets directly, or call libraries or other binaries outside the MUCK.
>>>
>>> Is this practical?  I'm thinking of Ruby or Python for this, if they
>>> can meet the requirements.
>>>
>> 
>> Don't forget Lua: www.lua.org
>> It fulfills your requirements and is easily embedable.
>> 
>
>I Agree with F.Bayer, when reading OP post, I immediatly think about Lua.
>
>
>

Does Lua have an appropriate security model--a sandbox or such?
Fond though I am of Lua, such would be news to me.


From __peter__ at web.de  Wed Nov  8 14:19:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Nov 2006 20:19:39 +0100
Subject: is this the right way to do subclasses?
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
Message-ID: <eitajt$bsk$03$1@news.t-online.com>

John Salerno wrote:

> Ok, back to my so-called "game." I'm just curious if I've implemented
> the subclasses properly, because it seems like an awful lot of
> repetition with the parameters. And again, if I want to add a new
> attribute later, I'd have to change a lot of things. I can't help but
> get the feeling that I'm doing something very inefficiently.

> class Character(object):
> 
>      def __init__(self, name, strength, dexterity, intelligence):
>          self.name = name
>          self.health = 10
>          self.strength = strength
>          self.dexterity = dexterity
>          self.intelligence = intelligence
> 
> 
> class Fighter(Character):
> 
>      def __init__(self, name, strength, dexterity, intelligence):
>          Character.__init__(self, name, strength, dexterity, intelligence)
>          self.health += 2
>          self.strength += 1

One way to avoid the repetition:

class Character(object):
    def __init__(self, name, strength, dexterity, intelligence):
        self.name = name
        self.health = 10
        self.strength = strength
        self.dexterity = dexterity
        self.intelligence = intelligence
        self.fix_attributes()

class Fighter(Character):
    def fix_attributes(self):
        self.health += 2
        self.strength += 1

You may need a no-op implementation of fix_attributes() in the Character
class.

Peter



From http  Sat Nov 25 04:39:45 2006
From: http (Paul Rubin)
Date: 25 Nov 2006 01:39:45 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
Message-ID: <7xbqmvn9um.fsf@ruckus.brouhaha.com>

"tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
> Your email indicates a possible concern that we are doing something
> untoward -- this was not at all intended, nor is it true.

Although you might not have intended it, I feel it is still true.  You
are misappropriating terminology ("free as in freedom") from the free
software movement that means a work is licensed in a way that meets
some specific criteria, that the license you're using does not meet.


From gabrielg_laburando at yahoo.com.ar  Thu Nov 30 02:19:01 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Thu, 30 Nov 2006 04:19:01 -0300
Subject: Python Question About Compiling.
In-Reply-To: <5b0fce7a0611292240k7c393468u48ffed455ec0feaa@mail.gmail.co
 m>
References: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
	<5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.com>
	<7.0.1.0.0.20061130033226.01fe7b98@yahoo.com.ar>
	<5b0fce7a0611292240k7c393468u48ffed455ec0feaa@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061130041705.04082e68@yahoo.com.ar>

At Thursday 30/11/2006 03:40, Scheol Service wrote:

>i know this. Is there better directions on how to use it?

Have you tried it? What's your actual problem? See http://www.py2exe.org/


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From 2huggie at gmail.com  Sun Nov 26 04:17:51 2006
From: 2huggie at gmail.com (Timothy Wu)
Date: Sun, 26 Nov 2006 17:17:51 +0800
Subject: Generator question
Message-ID: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>

Hi,

Using generator recursively is not doing what I expect:

def test_gen(x):
    yield x
    x = x - 1
    if x != 0:
        test_gen(x)

for item in test_gen(3):
    print item


This gives me a single number 3 and not printing 2 and 1 as I would expect.

What is wrong??

Timothy
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From nick at craig-wood.com  Thu Nov 16 01:32:55 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 16 Nov 2006 00:32:55 -0600
Subject: Python-2.5.exe?
References: <v8H6h.15$895.11@newsfe04.lga>
	<mailman.198.1163608644.32031.python-list@python.org>
Message-ID: <slrnelmujt.1f1.nick@irishsea.home.craig-wood.com>

Fredrik Lundh <fredrik at pythonware.com> wrote:
>  Andrew Burton wrote:
> 
> > What Python is best for installing to a USB Drive?  I've actually got 
> > 2.5 on a drive, but I forget which installation package I used.  It 
> > seems to me that it was an EXE file, but I cannot seem to find one of 
> > those today.
> > 
> > Can the Python-2.5.msi installation files from python.org be installed 
> > so as not to touch the registry, to make them portable?
> 
>  python doesn't depend on the registry settings for normal use, so
>  you can simply install python as usual, copy python25.dll from 
>  c:\windows\system32 to c:\python25, and then copy (or move) the
>  entire c:\python25 tree to your USB drive.

As well as the above, I find a little .bat file like this to set some
paths and start python or your application is helpful, eg

@echo off
set DEMOHOME=%CD%
set PYTHONHOME=%DEMOHOME%\Python24
set PYTHONPATH=%PYTHONHOME%;%DEMOHOME%\Demo\Python
set PYTHON=%PYTHONHOME%\python.exe
set PYTHONW=%PYTHONHOME%\pythonw.exe
set PATH=%PYTHONHOME%;%PATH%
start "Demo" "%PYTHONW%" "demo.pyw"

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


From george.sakkis at gmail.com  Sat Nov 11 15:04:21 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 11 Nov 2006 12:04:21 -0800
Subject: handling many default values
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<mailman.2074.1163201795.11739.python-list@python.org>
	<yZj5h.119$tb2.36@trnddc08>
	<mailman.2103.1163272955.11739.python-list@python.org>
Message-ID: <1163275461.313876.224480@m7g2000cwm.googlegroups.com>

Ben Finney wrote:

> "Alan Isaac" <aisaac at american.edu> writes:
>
> > There are *many* parameters, and the list can change, so I want to
> > avoid listing them all in the Param class's __init__ function, using
> > the strategy above.
> >
> > Q1: Is this approach reasonable?
> >     (This is a newbie question about unforseen hazards.)
> > Q2: Is it horrible design to isolate the parameters in a separate class?
> >     (Comment: currently several classes may rely on (parts of) the same
> > parameter set.)
>
> It's a bad design smell to have functions that accept large numbers of
> parameters, many of them optional. Such an interface is difficult to
> document, maintain and test.
>
> You should certainly be examining such code and seeing how much of it
> can be implemented instead as functions with small, well-defined
> parameter lists. This may mean writing more functions, or more layers
> of functions, or more classes, or whatever; but having a result that
> uses small, well-defined interfaces is a valuable property.

So I guess you prefer the (os.system, os.spawn*, os.popen*, popen2.*,
commands.*) kitchen sink than the single versatile subprocess.Popen
class, right ? I respectfully disagree, and I'm all for
one-class-does-it-all, as long as most parameters are optional and the
default values address the most typical/reasonable case.

To answer to OP's question, your approach is totally reasonable and
well-known; the csv.Dialect class for example is exactly this, a
parameter-holding class.

George



From carsten at uniqsys.com  Fri Nov 17 17:20:49 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Nov 2006 17:20:49 -0500
Subject: Decimal() instead of float?
In-Reply-To: <1163800304.5107.179.camel@pepper>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper> <4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org> <1163794251.5107.151.camel@pepper>
	<ejl5s5$334$1@sea.gmane.org>  <1163800304.5107.179.camel@pepper>
Message-ID: <1163802049.3358.43.camel@dot.uniqsys.com>

On Fri, 2006-11-17 at 16:51 -0500, Michael B. Trausch wrote:
> On Fri, 2006-11-17 at 21:25 +0100, Fredrik Lundh wrote: 
> > > Some of the lat/long pairs that I have used seem to come out fine, but 
> > > some do not.  Because the mathmatics used with them involve complex 
> > > equations when determining distance and the like, any error gets 
> > > massively compounded before a final result is evident.
> > 
> > sorry, but I don't think you have the slightest idea what you're doing, 
> > really.
> > 
> 
> Sure, I do.  Let's say that I want to work with the latitude
> 33.6907570.  In Python, that number can not be stored exactly without
> the aid of decimal.Decimal().
> 
> >>> 33.6907570
> 33.690756999999998
> >>> 
> 
> As you can see, it loses accuracy after the 6th decimal place.  That's
> not good enough:  I have 8 numbers that need to be exact, and I am
> only getting six.

Really?

>>> x = 33.6907570
>>> for i in range(7,16): print "%.*f" % (i,x)
... 
33.6907570
33.69075700
33.690757000
33.6907570000
33.69075700000
33.690757000000
33.6907570000000
33.69075700000000
33.690756999999998

Looks to me like you're getting, uh, 14 decimal digits, for a total of
16 significant digits. What kinds of operations are you performing that
compound this error by seven orders of magnitude?

-Carsten




From Eric_Dexter at msn.com  Wed Nov 22 22:37:14 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 22 Nov 2006 19:37:14 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164244166.988532.261370@l39g2000cwd.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164244166.988532.261370@l39g2000cwd.googlegroups.com>
Message-ID: <1164253034.295391.56720@j44g2000cwa.googlegroups.com>

The adobe people have online conversion

http://www.adobe.com/products/acrobat/access_onlinetools.html

google seems to convert them when they end up in the engines

http://www.google.com/search?hl=en&q=pdf+to+html

has a list of converters

http://www.dexrow.com


garylinux at gmail.com wrote:
> Tell us about it again when it is available as html. We will be glad to
> read it. I am sorry but I almost never find a pdf worth the bother of
> clicking on it.
> Sorry



From mgi820 at motorola.com  Tue Nov 21 14:37:06 2006
From: mgi820 at motorola.com (Gary Duzan)
Date: Tue, 21 Nov 2006 19:37:06 +0000 (UTC)
Subject: How good is CORBA?
References: <mailman.544.1164134192.32031.python-list@python.org>
Message-ID: <ejvkh2$7fh$1@engnntp2.cig.mot.com>

In article <mailman.544.1164134192.32031.python-list at python.org>,
Sai Krishna M <saikrishbe at gmail.com> wrote:
>Hi everybody,
>
>i have been developing web based applications using python+cheetah.
>
>The numbers are increasing. The applications have many common parts of
>code. Though these applications are separate from each other they are
>run in the same server.
>
>I heard about CORBA... but also heard that it has some flaws...like
>the programming being very complicated.
>Also heard that CORBA is no more used these days...

   CORBA is good for what it is good for. It does take some time
to get up to speed on it, but eventually most of it makes sense.
Some of the language mappings, especially C++, can be hard to use
safely, but the Python mapping is much easier to use.

   If you need good performance, multiple language support, multiple
OS/hardware platform support, and preferably control both ends of
the communication, CORBA may be for you. Check out omniORB for C++
and Python (http://omniorb.sourceforge.net/), and JacORB for Java
(http://www.jacorb.org/).

   Good luck.

					Gary Duzan
					Motorola CHS




From ronrsr at gmail.com  Mon Nov 20 02:36:17 2006
From: ronrsr at gmail.com (ronrsr)
Date: 19 Nov 2006 23:36:17 -0800
Subject: Not enough arguments for format string
In-Reply-To: <jY88h.892$Gk5.84@tornado.texas.rr.com>
References: <1163991320.262638.154950@j44g2000cwa.googlegroups.com>
	<jY88h.892$Gk5.84@tornado.texas.rr.com>
Message-ID: <1164008177.514993.283390@j44g2000cwa.googlegroups.com>

thanks.  solution 1 worked like a charm.


Paul McGuire wrote:
> "ronrsr" <ronrsr at gmail.com> wrote in message
> news:1163991320.262638.154950 at j44g2000cwa.googlegroups.com...
> > is the error message I'm getting here, on the long formatted print
> >



From l.m.aangeenbrug at gmail.com  Mon Nov 13 14:49:06 2006
From: l.m.aangeenbrug at gmail.com (lennart)
Date: 13 Nov 2006 11:49:06 -0800
Subject: Is python for me?
In-Reply-To: <mailman.78.1163442868.32031.python-list@python.org>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
	<mailman.78.1163442868.32031.python-list@python.org>
Message-ID: <1163447345.986774.289950@h54g2000cwb.googlegroups.com>


Carsten Haese schreef:

> On Mon, 2006-11-13 at 10:14 -0800, Dan Lenski wrote:
> > lennart wrote:
> > > So i ask myself is python the language I'm looking for?
> >
> > Yep!  Python is very much a jack-of-all-trades language.
>
> I'll run the risk of being nitpicky, but the full phrase is "Jack of all
> trades, master of none," which doesn't do Python justice. Python is a
> master of all trades!
>
> But I agree with Dan's sentiment, Python is definitely the language
> you're looking for.
>
> -Carsten.

Tnx everyone for your response! It's just for me a big step to learn a
new language. Not because of the difficulty, but because of the time
and so.

Later, i remembered that Gimp can also work with python (scripts). So,
even for my second wish, there will be somewhere, somehow a way to do
it.

At least: i use the dutch portal http://python.startpagina.nl/ to start
with. Can you advice me a good Python interpreter, or a good startpage
(as in Python for dummys)?

Lennart



From rthorpe at realworldtech.com  Fri Nov  3 05:33:24 2006
From: rthorpe at realworldtech.com (Robert Thorpe)
Date: 3 Nov 2006 02:33:24 -0800
Subject: Javascript is turning into Python?!
In-Reply-To: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1162550003.984693.208120@f16g2000cwb.googlegroups.com>

Paul Rubin wrote:
> I hadn't seem this before.  New Javascript 1.7 features:
>
> - Generators
> - Iterators
> - Array comprehensions
> - Destructuring assignment
>
> Sounds like another language we know.
>
> http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7

Indeed, this is a consequence of Greenspun's tenth rule, and it's good.
It doesn't have much to do with GNU Emacs though.



From mike$#at^&nospam!%trauschus  Fri Nov  3 21:19:27 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 03 Nov 2006 21:19:27 -0500
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <1162568409.144421.262160@e3g2000cwe.googlegroups.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
	<1162568409.144421.262160@e3g2000cwe.googlegroups.com>
Message-ID: <0cednc5i_d0yZdbYnZ2dnUVZ_sGdnZ2d@comcast.com>

GISDude wrote:
> Mike,
> I totally forgot that MS Works was out there. Haven't used that one in
> about 6 or 7 years. Honestly, your best bet is to convert to .csv or
> some delimited .txt file. Once that is done, all your rows/columns will
> be "nice and neat" .
> Once that is done, (and since your client doesn't have ACCESS, try
> MYSQL or POSTGRESQL(they are open source). They can handle A LOT OF
> DATA, so however big your orginal DB is, you can import it to one of
> these more than capable OS freebie Databases.
> 
> Good luck
>

Yeah; the only thing is that I am going to have to write a solution to
give them "easy" access to their data.  Sometimes, they just want to
look up a row of data, but they don't want to put their data in a
database server -- they want it on their machine so that it is "private"
(FSVO private--it's a Windows box).

	-- Mike


From kibleur.christophe at gmail.com  Sun Nov  5 14:19:34 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 5 Nov 2006 11:19:34 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1162749608.733730.321970@k70g2000cwa.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
Message-ID: <1162754374.637359.322990@m73g2000cwd.googlegroups.com>

Thanks Phil,
Can you put some hints about how to build QScintilla2 on Windows please
?



From __peter__ at web.de  Tue Nov 14 09:48:05 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 15:48:05 +0100
Subject: modules and generated code
References: <mailman.146.1163514956.32031.python-list@python.org>
Message-ID: <ejckue$ns2$01$1@news.t-online.com>

Nigel Rantor wrote:

> So, if I have a tool that generates python code for me (in my case,
> CORBA stubs/skels) in a particular package is there a way of placing my
> own code under the same package hierarchy without all the code living in
> the same directory structure.

http://docs.python.org/lib/module-pkgutil.html

Peter 



From grflanagan at yahoo.co.uk  Sat Nov  4 02:44:20 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 3 Nov 2006 23:44:20 -0800
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
	<k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>
Message-ID: <1162626260.236167.157920@m73g2000cwd.googlegroups.com>


James Stroud wrote:
> I have spent a lot of time making a "Table"
> class over about the last year and a half, but I'm not sure what might
> be an intuitive interface for most people. First, I think it should work
> like a "sorted" dictionary of lists, but, at the same time, a list of
> sorted dictionaries. I also want *shorthand* for selection.
>
> For example, does the output below look like an intuitive interface? Or,
> more likely, how many people get squeamish when they see this interface?
> Do these squeamish people have any better ideas? This is a taste of how
> my Table class currently behaves:
>
> py> print t     # dependent on its property t.format
>      Last      First      Age
>      Barker    Bob        204
>      Burnet    Carol      64
>      Danson    Ted        54
>      Cooper    Alice      78
> py> t.headings()
> ("Last", "First", "Age")
> py> t.get_row(1)
> ['Burnet', 'Carol', 64]
> py> t[1]
> ['Burnet', 'Carol', 64]
> py> t.get_column('Last')
> ['Barker', 'Burnet', 'Danson', 'Cooper']

+1 from me up to here

> py> # the following is probably the trickiest, should it return a Table
> py> # should it be illegal?
> py> # should t['Last'] be the way to take the "slice" and get the col?
> py> t[None, 'Last']     # 1d slice returns list (2nd dim. explicit)
> ['Barker', 'Burnet', 'Danson', 'Cooper']

I can imagine manipulating columns at the Table creation stage -
insert, append, delete column - but after that I think you would be
dealing with rows more often. Personally, if I needed columns I would
be happier with a list comprehension:

    [ (row['Last'], row['Age']) for row in t ] etc.

eg. like:

    http://buzhug.sourceforge.net/

> py> t2 = t[1:3, ('First', 'Age')]  # 2d slice returns a new Table
> py> t3 = t[1:3,'First':'Age']  # shorthand to take a swath of columns
> py> t3 = t[1:3, 0:2]  # if we know what column numbers we want instead

t[1:3][0:2] and so on would be more intuitive to me, possibly
t[1:3]['First':'Age']

> Please don't criticize unless you have a better idea
> about the API of a Table. I want to hear genuine and concrete ideas and
> not abstruse pontification about programming or design! Statements of "I
> wouldn't do this thing here" should be immediately followed by
> "--rather, I would do this other thing for which I've created a concrete
> example below."

chill...

Gerard



From bdesth.quelquechose at free.quelquepart.fr  Tue Nov  7 16:22:17 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 07 Nov 2006 22:22:17 +0100
Subject: object data member dumper?
In-Reply-To: <4550cddd$0$12104$88260bb3@free.teranews.com>
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
Message-ID: <4550f442$0$20337$426a34cc@news.free.fr>

tom arnall a ?crit :
> does anyone know of a utility to do a recursive dump of object data members? 
> 

What are "object data members" ? (hint: in Python, everything is an 
object - even functions and methods).

What is your real use case ?


From lycka at carmen.se  Thu Nov  2 06:41:58 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Nov 2006 12:41:58 +0100
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <ehr80e$25cv$1@ulysses.news.tiscali.de>
References: <mailman.1291.1161888414.11739.python-list@python.org>
	<ehr6vs$258l$1@ulysses.news.tiscali.de>
	<Sf90h.172$1n3.4082@news.tufts.edu>
	<ehr80e$25cv$1@ulysses.news.tiscali.de>
Message-ID: <eicli6$bcp$1@wake.carmen.se>

robert wrote:
> John Salerno wrote:
>> You want Python 2.3 for Windows?
> 
> yes.
> (I know no other big libs which already stops support of py2.3-win)

The general policy for Python is to support version 2.n-1 when 2.n is
the current version, but not older versions than that.

There was recently a 2.3.6 release with a security fix, but this is
really an exception. Since Python 2.5 was released, Python 2.4 is the
oldest supported Python version.

I was about to give a reference to the appropriate PEP, but right now
I can't for my life figure out where I read this... I'm just a bit more
brain dead than usual today, due to some virus.



From julvar at gmail.com  Mon Nov  6 01:24:11 2006
From: julvar at gmail.com (Julian)
Date: 5 Nov 2006 22:24:11 -0800
Subject: adding python scripting to my application
Message-ID: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>

Hi, first of all, I have to say I am new to Python. I have been working
with a finite element analysis program written in c++. now, I am trying
to 'rebuild' this code (possibly a full re-write) with scripting
capability. I did some reading on the web, and found that there are two
ways to do this : extending and embedding. and I still haven't figured
out what I should be using. I guess the first thing is to figure out
what I am to do with the scripting capability - at the very least, I
would like to run parametric analyses - run multiple analysis models by
changing certain parameters using for loops.
i found that the commercial fea package - abaqus uses python as well -
I don't know whether they embedded or extended ? is there any way to
find out?
another fea application called OOF2
(http://www.ctcms.nist.gov/oof/oof2/#features) says "OOF2 is completely
scriptable in Python". and I don't really understand what that means...
maybe I haven't grasped the full potential of what python scripting
could do for an fea program.

can you tell me how to decide what path I should take - embed or extend
? or maybe some one could point me to some document/webpage that talks
about this.

thanks a lot,
Julian.

PS, my fea program uses its own script to read the analysis model
information using the c++ iostream and our own parsing functions - but
I don't have to stick to those function when I am writing the new code.



From emin.shopper at gmail.com  Thu Nov  2 17:57:29 2006
From: emin.shopper at gmail.com (emin.shopper at gmail.com)
Date: 2 Nov 2006 14:57:29 -0800
Subject: emacs shell hangs on W32 with python
Message-ID: <1162508249.399337.233170@m73g2000cwd.googlegroups.com>

Emacs seems to freeze when doing certain shell commands on Microsoft
Windows. The following is a simple example with Xemacs:

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

[Xemacs version 21.4.19; January 2006]

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

h:\>c:\python25\python.exe -i
c:\python25\python.exe -i
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
>>>
>>>
>>> t = Tkinter.Tk()
>>> 2
2
2

-------------------------------------------
At this point, python no longer accepts input. This example works fine
when starting python through dos instead of emacs. Note, I am not using
python-mode.el so that is not the problem. I also reproduced the
problem with GNU Emacs (version "GNU Emacs 21.3.1
(i386-mingw-nt5.1.2600)
 of 2004-03-10 on NYAUMO")


Is there any way to run python through emacs or xemacs without having
it hang or is shell support broken?

Thanks in advance,
-Emin



From peter.mosley at talk21.com  Fri Nov 10 03:56:24 2006
From: peter.mosley at talk21.com (peter)
Date: 10 Nov 2006 00:56:24 -0800
Subject: Tkinter check box behaviour - Windows / Linux discrepancy
References: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
	<mailman.2007.1163118021.11739.python-list@python.org>
Message-ID: <1163148984.394092.200530@m7g2000cwm.googlegroups.com>

Thank you for those suggestions

I've tried it on Windows and it seems fine (with the minor change to
command=self.chkTest_click).  I'm currently at work, with no access to
Linux, so can't test it there until this evening.  

Muchas gracias!



From lycka at carmen.se  Mon Nov 13 11:47:30 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Nov 2006 17:47:30 +0100
Subject: Python component model
In-Reply-To: <1163349593.903843.167510@b28g2000cwb.googlegroups.com>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
	<1163349593.903843.167510@b28g2000cwb.googlegroups.com>
Message-ID: <eja7j2$k7c$1@wake.carmen.se>

sturlamolden wrote:
> There is a whole generation of computer users out there scared stiff of
> using the keyboard. Soon, computers will not have a keyboard at all.
> The trend is perhaps more pronounced among managers not writing code
> themselves, but "taking decisions" about which tools to use.

Is it just me, or does someone else feel that this is like
using magnetic letters on a refrigerator door instead of
a pen and paper. My two year old son thinks those magnetic
letters are fun, but then he can't write at all. My seven
year old has certainly switched to pen and paper (or computer)
for 99% of his writing. Sure, they have their use--it might be
more effective to write TENNIS with colorful letters across
the fridge door in some situation, but most of the time, pen
and paper is much more useful. You never run out of letters,
and it's easy to draw lines or arrows, complement the text
with a little picture etc. The cost for learning the skill
to write readable letters is well compensated for...

We recently released a toolkit for interfacing our systems
with legacy systems, and very soon, people started using it
in way we had never expected. I suppose that could be possible
with a "visual" tool too, but it seems to me that those tools
are typically fairly limited, just as computer based role-playing
games are much more limited than the ones played around a table
with a good flesh-and-blood game master who can respond to any
idea you come up with at the spur of the moment.



From vedran at v-programs.com  Thu Nov  9 12:22:50 2006
From: vedran at v-programs.com (vedran at v-programs.com)
Date: 9 Nov 2006 09:22:50 -0800
Subject: directpython application bug
Message-ID: <1163092970.356233.184700@b28g2000cwb.googlegroups.com>

Hello,
I using directpython for making 3d miniature applications,but I have
one problem about directpython.
This is my code for example:

import d3d
import d3dc
import d3dx



device=d3d.createDevice()
groundtexture=d3d.Font(u'my program',30)

...and when I run this code, directpython just open window and after
few minutes close the window


          What to I do?


                                           Thanks!!!



From theller at ctypes.org  Thu Nov  9 07:27:30 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 09 Nov 2006 13:27:30 +0100
Subject: [Ann] ctypes wiki
Message-ID: <45531EB2.1000104@ctypes.org>

I have installed a wiki which could / should be used to document the ctypes package and
ctypes related packages (like comtypes, for example).

ctypes is a foreign function library for Python:

    http://starship.python.net/crew/theller/ctypes/

I hope the wiki will evolve over time into a useful resource.

Currently there is no actual contents - so please contribute by adding tips, tricks,
and whatever you have to share about ctypes.

The wiki URL is:

  http://starship.python.net/crew/theller/wiki

Thomas


From heikki at osafoundation.org  Wed Nov  1 00:43:31 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Tue, 31 Oct 2006 21:43:31 -0800
Subject: Python and SSL enabled
In-Reply-To: <1162328451.004606.194700@m7g2000cwm.googlegroups.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
	<bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
	<1162328451.004606.194700@m7g2000cwm.googlegroups.com>
Message-ID: <IpydneCVwuGYqdXYnZ2dnUVZ_sCdnZ2d@comcast.com>

matey wrote:
> However, when I use the following command: python setup.py install
> I get the following error:
> 
> creating /usr/local/lib/python2.3/site-packages/M2Crypto
> error: could not create
> '/usr/local/lib/python2.3/site-packages/M2Crypto': Permission denied

Ok, it looks like you M2Crypto built ok, but now you face this
permission problem which is not specific to M2Crypto. You'd run into
this with any 3rd party python module.

> Since I don't have root privleges can I install the M2Crypto somewhere
> else?

You could manually copy the built M2Crypto directory somewhere in your
home directory, for example:

/home/mmedina/python2.3/site-packages/M2Crypto

Then, you'd edit (or create) PYTHONPATH environment variable so that it
contained /home/mmedina/python2.3/site-packages. After that you should
be able to import M2Crypto in your scripts. In the future if you needed
more 3rd party libs you could just place them as siblings of M2Crypto in
your personal site-packages dir we created above.

An alternative is to copy M2Crypto and any other 3rd party libs into the
same dir where your python script is so that when you do an import, the
3rd party libs are found in the same dir.

-- 
  Heikki Toivonen


From cping at dso.org.sg  Fri Nov 24 02:59:12 2006
From: cping at dso.org.sg (Jeremy)
Date: Fri, 24 Nov 2006 15:59:12 +0800
Subject: Newbie Developing a Python Extension
Message-ID: <ek68nq$2bj$1@nobel.pacific.net.sg>

Hi,

I have been working on Linux 2.6.9 to adapt a C++ module to work as a Python
extension with the following setup.py file:

from distutils.core import setup, Extension

sm=Extension(
 'tdma',
 define_macros=[('__USE_POSIX199309','1')],
 include_dirs=['/usr/include','/usr/include/python2.3'],
 library_dirs=['/usr/lib'],
 sources=['Bitstrea.cpp','bytequeu.cpp','debug.cpp','dlist.cpp',
  'GrPort.cpp','IoPort.cpp','LMEmu.cpp','LMEmuPdu.cpp',
  'MacPyIf.cpp','per_os_clk.cpp','timer.cpp'])

setup(name='MySm',
 version='0.1.0',
 description='TDMA MAC',
 ext_modules=[sm])

The extension uses the POSIX call clock_gettime() and things seem fine when
generating the tdma.so file. However, when running the Python program, at a 
line 'from tdma import init,txdn,txup,...', I get an error message saying 
'ImportError: /home/.../tdma.so: undefined symbol: clock_gettime'.

What is wrong here? Is the from-import statement right?

Why is it, when I use 'import sm' or 'from sm import...', I get the message 
'ImportError: No module named sm'?

Thanks,
Jeremy 




From michele.simionato at gmail.com  Fri Nov 10 03:12:37 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 10 Nov 2006 00:12:37 -0800
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163146357.902342.80730@f16g2000cwb.googlegroups.com>


gavino wrote:
> both are interpreted oo langauges......

Notice that gavino has a long history of asking trollish questions in
Lisp and Scheme
newsgroups and  he displays the typical behavior of a troll.

    Michele Simionato



From pyscripter at gmail.com  Mon Nov 20 08:50:50 2006
From: pyscripter at gmail.com (PyScripter)
Date: 20 Nov 2006 05:50:50 -0800
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <mailman.465.1163949088.32031.python-list@python.org>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
	<NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
	<mailman.436.1163881833.32031.python-list@python.org>
	<1163902308.672892.268320@k70g2000cwa.googlegroups.com>
	<mailman.465.1163949088.32031.python-list@python.org>
Message-ID: <1164030650.091271.160910@j44g2000cwa.googlegroups.com>


Kirill Simonov wrote:
> On Sat, Nov 18, 2006 at 06:11:48PM -0800, PyScripter wrote:
> > Kirill Simonov wrote:

> In PyScripter,
>     >>> print "...some cyrillic characters..."
> produces output as if an UTF-8 string is displayed in latin1.
> On the other hand,
>     >>> print u"...some cyrillic characters..."
> works correctly in PyScripter.  Both above examples works correctly in a
> real console when sys.stdout.encoding is set to 'utf-8'.

This is a problem with Python's compile function, which does not take
an encoding parameter  (same issue with IDLE).  This issue has been
discussed earlier in the Python newsgroups.  However PyScripter offers
an IDE option (Tools, Options, IDE options) "Use utf-8 in the
interpreter".  If this option is checked print u"...some cyrillic
characters..." works, otherwise print "...some cyrillic characters..."
works assuming you have the correct sys.getdefaultencoding().  So you
have a choice!

Unfortunately you cannot make both versions to work in the interactive
interpreter at the same time.  The "real" console takes the input from
streams the encoding of which can be specified.  Although this is
possible in PyScripter, it is a bit of a hassle to implement, but I may
do it in a future version.  Please note that when you run scripts both
versions will work with the right source encoding comment.


> raw_input() doesn't work at all with non-ASCII characters in PyScripter.
>     >>> raw_input("...some cyrillic characters...")
> displays the label in latin1 while
>     >>> raw_input(u"...some cyrillic characters...")
> produces UnicodeDecodeError.
>

raw_input is fixed and now accepts unicode in version 1.7.2.5.
Download from http://pyscripter.googlepages.com/PyScripterv1.7.2.5.zip.



From gagsl-py at yahoo.com.ar  Fri Nov 10 18:36:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 20:36:27 -0300
Subject: handling many default values
In-Reply-To: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
Message-ID: <7.0.1.0.0.20061110202730.04741d18@yahoo.com.ar>

At Friday 10/11/2006 14:11, Alan G Isaac wrote:

>My class MyClass reuses many default parameters
>with a small number of changes in each instance.
>For various reasons I decided to put all the
>parameters in a separate Params class, instances
>of which reset the default values based on keyword
>arguments, like this:
>
>class Params:
>      def __init__(self,**kwargs):
>          #set lots of default values
>          ...
>          #set the deviations from defaults
>          self.__dict__.update(kwargs)
>
>Is this a reasonable approach overall?
>(Including the last line.)

I'm not sure what you want to do exactly, but a class attribute acts 
as a default instance attribute.

class A(object):
     x = 0
     y = 20
     def __init__(self, x=None, y=None):
                 if x is not None: self.x = x
                 if y is not None: self.y = y

class B(A):
     z = 3
     def __init__(self, x=None, y=None, z=None):
                 A.__init__(self, x, y)
                 if z is not None: self.z = z

a = A(1)
print "a.x=",a.x
print "a.y=",a.y

b = B(z=8)
print "b.x=",b.x
print "b.y=",b.y
print "b.z=",b.z

output:

a.x= 1
a.y= 20
b.x= 0
b.y= 20
b.z= 8


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ptmcg at austin.rr._bogus_.com  Wed Nov  8 17:51:45 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 08 Nov 2006 22:51:45 GMT
Subject: decorators
References: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
	<mailman.1938.1163022175.11739.python-list@python.org>
Message-ID: <5ct4h.685$mR4.482@tornado.texas.rr.com>

"Carsten Haese" <carsten at uniqsys.com> wrote in message 
news:mailman.1938.1163022175.11739.python-list at python.org...
> If none of the examples make you say
> "wow, I could use this" and if you don't find yourself writing
> repetitive setup/teardown/housekeeping code, you can probably live quite
> comfortably without using decorators.
>

Amen!  Don't force yourself to learn decorators if you don't need them at 
the moment.  Wait until you start repeating the same code (lock/unlock, 
dbready/dbcommit, logstart/logend, etc.) around multiple functions, then go 
back and try applying a decorator to simplify the job.  Having a real use 
for them will make it much easier to "get".

I will say, though, that I found the memoizing decorator to be especially 
intriguing and eye-opening, and didn't realize I needed it until I saw it 
laid out in front of me.

-- Paul




From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 22 06:41:25 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 22 Nov 2006 22:41:25 +1100
Subject: Is there a list comprehension for this?
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>
	<1164171602.525542.56750@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.10.17.59.870599@REMOVE.THIS.cybersource.com.au>
	<1164191284.251308.316810@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.22.11.41.24.555150@REMOVE.THIS.cybersource.com.au>

On Wed, 22 Nov 2006 02:28:04 -0800, John Machin wrote:

> 
> Steven D'Aprano wrote:
>> On Tue, 21 Nov 2006 21:00:02 -0800, John Machin wrote:
>>
>> > Steven D'Aprano wrote:
>> >
>> > [snip]
>> >
>> >> def running_sum(dw):
>> >>     """Return a list of the running sums of sequence dw"""
>> >>     rs = [0]*len(dw)
>> >>     for i in range(len(dw)):
>> >>         rs[i] = dw[i] + rs[i-1]
>> >
>> > Please explain to the newbies why there is no exception raised when
>> > rs[i-1] is executed for i == 0, and state whether you consider this is
>> > a Good Idea or a Filthy Trick or a Fortunate Accident.
>>
>> Because rs[0-1] is just rs[-1], which fetches the LAST item of the list. I
>> cunningly initialised the list to all zeroes, so adding zero to the first
>> term doesn't change the result value.
>>
>> It is a variation of the sentinel technique, where you add an extra value
>> to the beginning or end of a list so that you don't need to treat the
>> first or last item differently. In this specific case, I think it is a
>> combination of Good Idea and Fortunate Accident, but since the
>> meaning of list[-1] is both deliberate and well-documented, it is
>> certainly not a Filthy Trick.
>>
> 
> Fair enough. But it does make the concerned reader go back a couple of
> lines to see why it doesn't run amok.

Nobody said that every piece of code should be instantly comprehensible
just at a glance. Sometimes you do actually have to think about code to
understand it, even in Python :)

> Here's my attempt at a
> no-reader-backtracking solution:
> 
> def running_sum_2(dw):
>     rs = dw[:1]
>     for i in xrange(1, len(dw)):
>         rs.append(dw[i] + rs[-1])
>     return rs
> 
> Comments invited.

Even with xrange() instead of range, it is a little slower than my version
for largish input lists because you are repeatedly appending to a list.

>>> timeit.Timer("running_sum(L)", 
... "from __main__ import running_sum; L = range(500)").timeit(1000)
0.56354999542236328
>>> timeit.Timer("running_sum_2(L)", 
... "from __main__ import running_sum_2; L = range(500)").timeit(1000)
0.68534302711486816

Although the speed difference disappears (or even reverses) for small
enough lists. Either way, it isn't really a major speed difference --
Python's resizing of lists is very smart.

But why build a list of all the running sums when you probably only need
them one at a time? Here's a generator version that can take any iterable,
not just a sequence:

def running_sum_3(iterable):
    sum_ = 0
    for x in iterable:
        sum_ += x
        yield sum_

And it is considerably faster than either of the list-only versions:

>>> timeit.Timer("list(running_sum_3(L))", 
... "from __main__ import running_sum_3; L = range(500)").timeit(1000)
0.33915305137634277



-- 
Steve.



From e0427417 at student.tuwien.ac.at  Mon Nov 20 03:56:20 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 09:56:20 +0100
Subject: a few extensions for the itertools
In-Reply-To: <1163982188.673884.255770@b28g2000cwb.googlegroups.com>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<u548h.601$Gk5.399@tornado.texas.rr.com>
	<1163982188.673884.255770@b28g2000cwb.googlegroups.com>
Message-ID: <45616d56$0$10578$3b214f66@tunews.univie.ac.at>

Carl Banks wrote:
> Paul McGuire wrote:
>> "Mathias Panzenboeck" <e0427417 at student.tuwien.ac.at> wrote in message
>> news:4560bfb0$0$10578$3b214f66 at tunews.univie.ac.at...
>>> I wrote a few functions which IMHO are missing in python(s itertools).
>>>
>>> You can download them here:
>>> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>>>
>>> A short description to all the functions:
>>>
>> Just a couple of questions:
>>
>>> iproduct(iterable, start=0) -> value
>>> Returns the product of the elements of a iterable
>>> times the value of parameter 'start'.  When the
>>> iterable is empty, returns start.
>>>
>> Wouldn't 1 be a better default value for start?
> 
> I concur; start should default to 1.
> 

Bug in the documentation, not in the function. ;)


From jeremy+complangpython at jeremysanders.net  Thu Nov  9 12:34:10 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Thu, 09 Nov 2006 17:34:10 +0000
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
Message-ID: <eivoqi$2jp$1@scorpius.csx.cam.ac.uk>

Dan Lenski wrote:

> Nick and John S., thank you for the tip on wxPython!  I'll look into it
> for my next project.  I too would avoid Qt, not because of the GPL but
> simply because I don't use KDE under Linux and because Qt is not well
> supported under Cygwin or on native Windows.  I too like to learn from
> actual printed books, so I'll check this one out.  O'Reilly should do a
> book on Python GUI stuff!

PyQt is well supported under native Windows. Qt-4 is now GPLd for Windows
too. I'd highly recommend it.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From mfein2 at earthlink.net  Thu Nov  2 09:54:04 2006
From: mfein2 at earthlink.net (mattf)
Date: 2 Nov 2006 06:54:04 -0800
Subject: Python in sci/tech applications
Message-ID: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>

I've discovered Python and have been trying it out lately as a possible
replacement for computations that would ordinarily be done with a
commercial package like Matlab or IDL. I'd like to mention a few things
I've run across that have either surprised me or kept me from doing
things the way I'd like to.

1) -There's a large and active sci/tech Python community out there.-
This was something of a surprise. If you look at the python.org site
and click down a couple of levels past the front page, there's a rather
brief mention of scientific and numeric applications-- but I don't
think this does justice to the current levels of activity and
accomplishment.

2) -There's a very impressive set of libraries out there-
NumPy, SciPy, Enthought. It's really kind of stunning how mature these
libraries are and how much I had to poke around to figure that out.

3) -There's a problem with development under Windows.
A typical task will entail writing a 'pure python' prototype to get the
'data in, data out' part of a problem straightened out, then writing a
module in C to get adequate performance in production runs. But the C
compiler that my employer provides (the current version of MSVS)
doesn't produce libraries that work with the current version of Python.
Ooops. This, in the real world, is a big problem. I -love- Python. And
I think I could convince other people to use it. But I've got to have a
way to produce compiled modules painlessly, i.e., without installing a
new operating system.



From spe.stani.be at gmail.com  Mon Nov  6 18:45:22 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 6 Nov 2006 15:45:22 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <Z9b3h.2827$IJ1.2467@newsfe15.lga>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
	<Z9b3h.2827$IJ1.2467@newsfe15.lga>
Message-ID: <1162856722.569478.68120@f16g2000cwb.googlegroups.com>

gblais at cox.net schreef:

> I have both, but the IDE I use every day is SPE, which is shareware.  I'm
> not savvy enough to enumerate a feature comparison, but I do find SPE
> extremely friendly and intuitive.
>
> Gerry

SPE is not shareware. It is open-source, gpl-licensed freeware.
Donations however never hurt.

Stani

--
http://pythonide.stani.be



From fredrik at pythonware.com  Wed Nov 22 13:51:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 19:51:39 +0100
Subject: utf - string translation
In-Reply-To: <yR09h.1987$%_2.506@newsfe19.lga>
References: <yR09h.1987$%_2.506@newsfe19.lga>
Message-ID: <ek267q$6qf$1@sea.gmane.org>

hg wrote:

> We noticed that len('?') != len('a')

sounds odd.

 >>> len('?') == len('a')
True

are you perhaps using an UTF-8 editor?

to keep your sanity, no matter what editor you're using, I recommend 
adding a coding directive to the source file, and using *only* Unicode 
string literals for non-ASCII text.

or in other words, put this at the top of your file (where "utf-8" is 
whatever your editor/system is using):

    # -*- coding: utf-8 -*-

and use

    u'<text>'

for all non-ASCII literals.

</F>



From dhwild at talktalk.net  Wed Nov 22 17:16:41 2006
From: dhwild at talktalk.net (David H Wild)
Date: Wed, 22 Nov 2006 22:16:41 +0000 (GMT)
Subject: utf - string translation
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
Message-ID: <4564dd7b$0$1349$834e42db@reader.greatnowhere.com>

In article <1164232741.215312.322990 at k70g2000cwa.googlegroups.com>,
   John Machin <sjmachin at lexicon.net> wrote:
> So why do you want to strip off accents? The history of communication
> has several examples of significant difference in meaning caused by
> minute differences in punctuation or accents including one of which you
> may have heard: a will that could be read (in part) as either "a chacun
> d'eux million francs" or "a chacun deux million francs" with the
> remainder to a 3rd party.

The difference there, though, is a punctuation character, not an accent.

-- 
David Wild using RISC OS on broadband


From breakfastea at gmail.com  Sat Nov 11 04:57:14 2006
From: breakfastea at gmail.com (Camellia)
Date: 11 Nov 2006 01:57:14 -0800
Subject: UnboundLocalError
In-Reply-To: <mailman.2091.1163233165.11739.python-list@python.org>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
	<1163223355.190176.127030@h48g2000cwc.googlegroups.com>
	<mailman.2085.1163229531.11739.python-list@python.org>
	<1163232187.747318.132260@m73g2000cwd.googlegroups.com>
	<mailman.2091.1163233165.11739.python-list@python.org>
Message-ID: <1163239034.138715.189970@b28g2000cwb.googlegroups.com>

Oh thank you for pointing that out Fredrik, you made the case more
clear:)

On Nov 11, 7:19 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> Camellia wrote:
> > Oh how can I thank you enough, you make my day:)
> > According to what you said I finally figure it out, it is the same as:
>
> > <code>
> > b = 1
> > def a():
> >     b = b #no good:)
> > </code>if you really want to modify a variable that lives outside the function,
> you can use the "global" directive:
>
> http://effbot.org/pyfaq/how-do-you-set-a-global-variable-in-a-functio...
>
>  > So in every day programming I should avoid using the same name for
>  > different types of objects because they will step on each other,
>  > right?
>
> if you want to distinguish between things, giving them distinct names is
> always a good idea.
> 
> </F>



From rrs at researchut.com  Sat Nov 25 18:27:26 2006
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: 25 Nov 2006 15:27:26 -0800
Subject: screen output problem
Message-ID: <1164497246.626735.254050@h54g2000cwb.googlegroups.com>

Hi,

I have, for very long, been trying to find a consistent solution (which
could work across major python platforms - Linux, Windows, Mac OS X)
for the following problem.

I have a function which downloads files from the web. I've made the
function threaded. I'm trying to implement a progress bar for it which
could work across all the platforms.

The problem is that when the progress bar is displayed, all the threads
overwrite the progress bar.

I've thought of using curses but AFAIK curses is not available for
Windows.

Is there a generic way to accomplish the following:

progress = "[===================]\n[=======================]"
for x in range(5):
    sys.stdout.write(progress + "\r")

Basically, I want a way through which I want to display data on two
lines and make sure that "\r" overwrites the two lines without putting
a newline making sure that whatever library it uses is available across
all major Python platforms.

Thanks,
Ritesh



From jseigh_01 at xemaps.com  Tue Nov  7 16:13:33 2006
From: jseigh_01 at xemaps.com (Joe Seigh)
Date: Tue, 07 Nov 2006 16:13:33 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <4550F2AE.1010205@v.loewis.de>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
Message-ID: <v_WdnZltc-QUa83YnZ2dnUVZ_tednZ2d@comcast.com>

Martin v. L?wis wrote:
> You still didn't say what you would suggest to make it thread-safe
> again; most likely, you proposal would be to add locking. If I
> understand Joe's approach correctly, he has a solution that does
> not involve locking (although I don't understand how it works).
> 
Sun had applied for a patent on it.  You can go to the
uspto search page here http://www.uspto.gov/patft/index.html
and look for

20060218561 Code preparation technique employing lock-free pointer operations
20060037026 Lightweight reference counting using single-target synchronization

Click on the images link on the patent application where the illustrations
are which show the concepts probably better than the text.

The first one above is actually a continuation patent on three different
techniques.  One using double wide compare and swap, one using ROP (Repeat
Offender Problem), a form of PDR, and one using DCAS (compare and swap
of two separate locations) which only exists on MC68020 and MC68030
processors.

-- 
Joe Seigh

When you get lemons, you make lemonade.
When you get hardware, you make software. 


From __peter__ at web.de  Tue Nov 28 07:46:50 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 13:46:50 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>	<ekgt97$31p$00$2@news.t-online.com>	<ekgto0$khn$02$1@news.t-online.com>	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>	<ekh0nm$9sh$00$1@news.t-online.com>	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
	<mailman.801.1164715357.32031.python-list@python.org>
Message-ID: <ekhb2e$b1q$03$1@news.t-online.com>

Fredrik Lundh wrote:

> John Machin wrote:
> 
>> I'm extremely agnostic about the spelling :-) IOW I'd be very glad of
>> any way [pure Python; e.g. maintaining my own version of the array
>> module doesn't qualify] to simply and rapidly create an array.array
>> instance with typecode t and number of elements n with each element
>> initialised to value v (default to be the zero appropriate to the
>> typecode).
> 
>      array(t, [v])*n

Of course Leo was already there before I messed it up again. 

$ python2.5 -m timeit -s'from array import array; s = "abc"' 'a = array("c",
s); a*1000000'
10 loops, best of 3: 53.5 msec per loop

$ python2.5 -m timeit -s'from array import array; s = "abc"' 'a = array("c",
s); s*1000000'
100 loops, best of 3: 7.63 msec per loop

So str * N is significantly faster than array * N even if the same amount of
data is copied.

Peter



From cameron.walsh at gmail.com  Tue Nov 28 02:53:11 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 28 Nov 2006 15:53:11 +0800
Subject: splitting a long string into a list
In-Reply-To: <1164698637.721659.169240@n67g2000cwd.googlegroups.com>
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
	<mailman.788.1164693655.32031.python-list@python.org>
	<1164698637.721659.169240@n67g2000cwd.googlegroups.com>
Message-ID: <ekgpr1$e94$1@enyo.uwa.edu.au>

ronrsr wrote:
> still having a heckuva time with this.
> 
> here's where it stand - the split function doesn't seem to work the way
> i expect it to.
> 
> 
> longkw1,type(longkw):   Agricultural subsidies; Foreign
> aid;Agriculture; Sustainable Agriculture - Support; Organic
> Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> <type 'list'> 1
> 
> longkw.replace(',',';')
> 
> Agricultural subsidies; Foreign aid;Agriculture; Sustainable
> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> Development

Here you have discovered that string.replace() returns a string and does
NOT modify the original string.  Try this for clarification:

>>> a="DAWWIJFWA,dwadw;djwkajdw"
>>> a
'DAWWIJFWA,,,,,,dwadw;djwkajdw'
>>> a.replace(",",";")
'DAWWIJFWA;;;;;;dwadw;djwkajdw'
>>> a
'DAWWIJFWA,,,,,,dwadw;djwkajdw'
>>> b = a.replace(',',';')
>>> b
'DAWWIJFWA;;;;;;dwadw;djwkajdw'



> 
> 
>  kw = longkw.split("; ,")    #kw is now a list of len 1

Yes, because it is trying to split longkw wherever it finds the whole
string "; '" and NOT wherever it finds ";" or " " or ",".  This has been
stated before by NickV, Duncan Booth, Fredrik Lundh and Paul McGuire
amongst others. You will need to do either:

a.)

# First split on every semicolon
a = longkw.split(";")
b = []
# Then split those results on whitespace
#(the default action for string.split())
for item in a:
  b.append(item.split())
# Then split on commas
kw = []
for item in b:
kw.append(item.split(","))

or b.)

# First replace commas with spaces
longkw = longkw.replace(",", " ")
# Then replace semicolons with spaces
longkw = longkw.replace(";", " ")
# Then split on white space, (default args)
kw = longkw.split()


Note that we did:
longkw = longkw.replace(",", " ")
and not just:
longkw.replace(",", " ")


You will find that method A may give empty strings as some elements of
kw.  If so, use method b.


Finally, if you have further problems, please please do the following:

1.)  Provide your input data clearly, exactly as you have it.
2.)  Show exactly what you want the output to be, including any special
cases.
3.)  If something doesn't work the way you expect it to, tell us how you
expect it to work so we know what you mean by "doesn't work how I expect
it to"
4.)  Read all the replies carefully and if you don't understand the
reply, ask for clarification.
5.)  Read the help functions carefully - what the input parameters have
to be and what the return value will be, and whether or not it changes
the parameters or original object.  Strings are usually NOT mutable so
any functions that operate on strings tend to return the result as a new
string and leave the original string intact.

I really hope this helps,

Cameron.


From fredrik at pythonware.com  Sat Nov 11 21:08:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 03:08:02 +0100
Subject: reduce to be removed?
In-Reply-To: <1163295752.701124.322620@h54g2000cwb.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
Message-ID: <ej5vlv$4ok$1@sea.gmane.org>

Dustan wrote:

>>>> foo =\
> [[[1,2,3],[4,5,6],[7,8,9]],
>  [[3,2,1],[6,5,4],[9,8,7]]]
> 
> Here, foo appears to be a 3-dimensional list - except it's supposed to
> be 2-dimensional. The inner-list-of-lists is a result of how I'm
> producing the data, and now I want to do a mass-concatenation (or
> extending) of the inner-list-of-lists, and come up with this result:
> 
>>>> foo == [[1,2,3,4,5,6,7,8,9],[3,2,1,6,5,4,9,8,7]]
> True

that still doesn't explain your "the expression must be used in a list 
comprehension" requirement, though.  assuming that the sizes are 
varying, and at least sometimes a lot larger than 3x3, I'd probably 
write the above as

     for index, item in enumerate(foo):
         this = []
         for i in item:
             this.extend(i)
         foo[index] = this

which should be pretty efficient, since it avoids unnecessary function 
calls, and is amortized linear time instead of O(N**2).

or, if I was in a hurry, and didn't really care if the inner sequences 
were lists or tuples:

	foo = map(Tkinter._flatten, foo)

</F>



From __peter__ at web.de  Thu Nov  2 15:44:06 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 02 Nov 2006 21:44:06 +0100
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
Message-ID: <eidlah$v0m$01$1@news.t-online.com>

JohnJSal wrote:

> Can someone explain to me why the first version of this method works,
> but the second one doesn't? All I've changed (I think) is how the
> information is nested. The error I'm getting is that the call to
> xrc.XRCCTRL is not working in the second example. Instead of getting
> the appropriate widget, it's returning None. Is this a result of the
> nesting, or the for loops perhaps?
> 
> Thanks.
> 
> 
>     def OnSaveRecord(self, event):
>         textfield_values = []
>         for tab in self.notebook.GetCurrentPage().GetChildren():
>             for table in self.get_textfield_ids():
>                 table_values = []
>                 for textfield_id in table:
Put in a 
                      print textfield_id

here. You'll see an 'n'

before the exception occurs, because...

>                     table_values.append(xrc.XRCCTRL(tab,
> textfield_id).GetValue())
>                 textfield_values.append(table_values)
>         self.save_to_database(textfield_values)
> 
>     def get_textfield_ids(self):
>         return (('firstName', 'middleName', 'lastName', 'birthMonth',
>                 'birthDay', 'birthYear', 'country', 'state', 'city'),
>                 ('jobTitle', 'salary', 'labBuilding', 'labRoom',
> 'labPhone'),
>                 ('localAddress', 'foreignAddress', 'emailAddress',
> 'homePhone',
>                 'foreignPhone', 'cellPhone'), ('university1',
> 'yearStart1',
>                 'yearEnd1', 'degree1', 'university2', 'yearStart2',
> 'yearEnd2',
>                 'degree2', 'university3', 'yearStart3', 'yearEnd3',
> 'degree3',
>                 'university4', 'yearStart4', 'yearEnd4', 'degree4'),
> ('notes'))

...the above is not a 1-tuple, but an ordinary string. You forgot the
trailing comma: 

('notes',)

Peter



From horpner at yahoo.com  Wed Nov  1 11:46:17 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 1 Nov 2006 17:46:17 +0100
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<1162398506.919161.145290@m7g2000cwm.googlegroups.com>
Message-ID: <slrnekhjt8.1ok.horpner@FIAD06.norwich.edu>

On 2006-11-01, bearophileHUGS at lycos.com <bearophileHUGS at lycos.com> wrote:
> Neil Cerutti:
>> scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
>>    'WriteAppend', 0)
>
> That "+" sign seems useless. A space looks enough to me. The
> functions can accept case-agnostic strings and ignore spaces
> inside them. Example:
> ('transcript textmode ', 'writeappend', 0)

That's pretty cool. Not as pretty, but easier for users,
possibly.

>> Parsing the combinable bitfield contants might be slowish,
>> though.
>
> I think you have to test if this is true for your situation.
> Management of interned strings is probably fast enough
> (compared to the rest of things done by the Python interpreter)
> for many purposes.

Agreed. I meant I'd have to later test if it's were fast enough.

-- 
Neil Cerutti


From johnjsal at NOSPAMgmail.com  Mon Nov  6 16:57:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 06 Nov 2006 16:57:58 -0500
Subject: assigning values in __init__
Message-ID: <454faf57$0$12993$c3e8da3@news.astraweb.com>

Let's say I'm making a game and I have this base class:

class Character(object):

     def __init__(self, name, stats):
         self.name = name
         self.strength = stats[0]
         self.dexterity = stats[1]
         self.intelligence = stats[2]
         self.luck = stats[3]

Is this a good way to assign the values to the different attributes? 
Should 'stats' be a list/tuple (like this), or should I do *stats instead?

I'm trying to think ahead to when I might want to add new attributes, 
and I want to make sure this doesn't get crazy with individual 
parameters instead of just the one list.

Or maybe there's some way to loop through two lists (the stats and the 
attributes) and assign them that way? I was thinking of a nested for 
statement but that didn't seem to work.


From python.list at tim.thechases.com  Wed Nov  1 15:28:01 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 01 Nov 2006 14:28:01 -0600
Subject: Style for modules with lots of constants
In-Reply-To: <Xns986EC9B236E30rtwfreenetREMOVEcouk@216.196.109.145>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>	<XU32h.436$lx6.417@tornado.texas.rr.com>	<Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>	<KN42h.561$Qn2.495@tornado.texas.rr.com>
	<Xns986EC9B236E30rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <45490351.7090508@tim.thechases.com>

>> The reason I used instances instead of just the Constants
>> class was so that I could define a little more descriptive
>> context for the constants,
> 
> Sorry I don't know what you mean here, could I have an example


It helps in the recognition if you have separation between 
something like

	turnDirection.LEFT

and

	alignment.LEFT

They may be the same or different value for LEFT, but by grouping 
them in a "descriptive context", it's easy to catch mistakes such as

	paragraph.align(turnDirection.LEFT)

when what you want is

	paragraph.align(alignment.LEFT)

and, as an added bonus, prevents name clashes such as

	turnDirection.LEFT = 2
	alignment.LEFT = 0

With the grab-bag o' constants, you have to use old-school 
C-style in your modern name-space'd Python:

	gboc.TURN_LEFT = 2
	gboc.ALIGN_LEFT = 0

or even worse, you'd end up with cruftage where you have

	gboc.LEFT = 2
	gboc.ALIGN_LEFT = 0 #created a month later as needed

and then accidentally call

	paragraph.align(gboc.LEFT)

when you mean

	paragraph.align(gboc.ALIGN_LEFT)

This is what I understand the grandparent's post to be referring 
to by "descriptive context".

-tkc





From ginstrom at tree.odn.ne.jp  Mon Nov  6 04:39:37 2006
From: ginstrom at tree.odn.ne.jp (Ryan Ginstrom)
Date: Mon, 6 Nov 2006 18:39:37 +0900
Subject: Classes referencing each other
In-Reply-To: <op.te6xmbem58416w@merkur.intern.prolink.de>
Message-ID: <20061106094002729.HSQQ.203523.t-mta2.odn.ne.jp@mta2.odn.ne.jp>

> Behalf Of Manuel Bleichner
> In a module I have a huge number of classes of the form:
> 
> class A(object):
>    connected_to = [B, C]
>    <other attributes...>
> 
> class B(object)
>    connected_to = [C]
>    <other attributes...>
> 
> class C(object)
>    connected_to = [A]
>    <other attributes...>
> 
> As you see, classes A and B reference classes that are not 
> yet defined when the class is being defined.
> It will raise a NameError: 'B'.

How about a connection broker?

Simple example:

#############################
connections = {}

def Register( obj ):
	try:
		connections[obj.name]['obj'] = obj
	except KeyError:
		connections[obj.name] = { 'obj' : obj, 'connected_to' : [] }

def ConnectTo( objname, obj ):
	try:
		connections[objname]['connected_to'].append( obj )
	except KeyError:
		connections[objname] = { 'obj' : None, 'connected_to' :
[obj] }

class ConnectionObject:
	def __str__(self):
		return self.name

class A(ConnectionObject):
    def __init__(self):
        self.name = 'A'
        Register( self )
        ConnectTo( 'B', self )


class B(ConnectionObject):
    def __init__(self):
        self.name = 'B'
        Register( self )
        ConnectTo( 'A', self )
        ConnectTo( 'C', self )


class C(ConnectionObject):
    def __init__(self):
        self.name = 'C'
        Register( self )
        ConnectTo( 'A', self )


a = A()
b = B()
c = C()


for (key, val) in connections.iteritems():
    print 'object: %s (%s)' % ( key, val['obj'] )
    str_vals = []
    for obj in val['connected_to']:
        str_vals.append( str( obj ) )
    print '\tconnections from:', str_vals

#############################
Output:

object: A (A)
	connections from: ['B', 'C']
object: C (C)
	connections from: ['B']
object: B (B)
	connections from: ['A']
object: D (None)
	connections from: ['C']

Regards,
Ryan Ginstrom



From walterbyrd at iname.com  Fri Nov 17 20:56:43 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 17 Nov 2006 17:56:43 -0800
Subject: What do I look for in a shared Python host?
Message-ID: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>

For example:

- If I want to use Django, I need either FastCGI or Apache
2.X/mod_python 3.x

- if I want to use TurboGears, I need Python 2.4: not 2.3 and not 2.5

- I have just learned that some hosters have T&Cs that forbid long
running processes. I am not sure exactly what that means. Except I
understand it can be a problem if using Cherrypy/TurboGears

- I have read that mod_python before 3.x can be difficult

What other "gotchas" would I look for?



From horpner at yahoo.com  Tue Nov 21 10:35:12 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 21 Nov 2006 16:35:12 +0100
Subject: interleaving dictionary values
References: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
Message-ID: <slrnem678i.1b4.horpner@FIAD06.norwich.edu>

On 2006-11-21, j1o1h1n at gmail.com <j1o1h1n at gmail.com> wrote:
> I had in mind something like this:
>
>>>> interleave([1, 2, 3], [4,5], [7, 8, 9])
> [1, 4, 7, 2, 5, 8, 3, 9]
>
> [...] before giving up and going back to trusty old map(), long
> celebrated for making code hard to read:
>
>>>> map(None, [1, 2, 3], [4,5], [7, 8, 9])
> [(1, 4, 7), (2, 5, 8), (3, None, 9)]
>
> This is basically it.  It then becomes:
>
>>>> filter(None, flatten(map(None, [1, 2, 3], [4,5], [7, 8, 9])))
> [1, 4, 7, 2, 5, 8, 3, 9]

You can use itertools.chain instead of flatten:

>>> from itertools import chain
>>> filter(None, chain(*map(None, [1, 2, 3], [4, 5], [7, 8, 9])))
[1, 4, 7, 2, 5, 8, 3, 9]

> Trouble is then getting map() to play with the result of dict.values().
>  I only worked this out while writing this post, of course.
>
> Given a dictionary like d = { "a" : [1, 2, 3], "b" : [4, 5], "c" : [7,
> 8, 9]} - I was hoping to do this:
>
>   map(None, d.values())

You need the * to "unpack" the list. It has generally taken the
place of apply.

>>> map(None, *d.values())
[(1, 7, 4), (2, 8, 5), (3, 9, None)]

> So... my bit of code becomes:

>>> filter(None, chain(*map(None, *d.values())))
[1, 7, 4, 2, 8, 5, 3, 9]

I don't think that the specific ordering that's achieved has any
valuable significance. You might be just as happy with the
simpler:

>>> list(chain(*d.values()))
[1, 2, 3, 7, 8, 9, 4, 5]

-- 
Neil Cerutti
Weight Watchers will meet at 7 p.m. Please use large double door at the side
entrance. --Church Bulletin Blooper


From vania.cIlli at gmail.com  Thu Nov 23 07:32:45 2006
From: vania.cIlli at gmail.com (Vania)
Date: 23 Nov 2006 04:32:45 -0800
Subject: socket.error connection refused
In-Reply-To: <mailman.635.1164284752.32031.python-list@python.org>
References: <B58381932.818.38963.1@mxextra>
	<mailman.635.1164284752.32031.python-list@python.org>
Message-ID: <1164285165.811809.175040@j72g2000cwa.googlegroups.com>

Hi, the reason I mentioned the socket is because that is
where the error eventually occurs.

the code I tried manually (with different urls including a local one)
is the following:

import urllib
fo=urllib.urlopen("http://www.google.com")

the error I get is:

  File "<stdin>", line 1, in ?
  File "C:\Python24\lib\urllib.py", line 82, in urlopen
    return opener.open(url)
  File "C:\Python24\lib\urllib.py", line 190, in open
    return getattr(self, name)(url)
  File "C:\Python24\lib\urllib.py", line 313, in open_http
    h.endheaders()
  File "C:\Python24\lib\httplib.py", line 798, in endheaders
    self._send_output()
  File "C:\Python24\lib\httplib.py", line 679, in _send_outp
    self.send(msg)
  File "C:\Python24\lib\httplib.py", line 646, in send
    self.connect()
  File "C:\Python24\lib\httplib.py", line 630, in connect
    raise socket.error, msg
IOError: [Errno socket error] (10061, 'Connection refused')


Tim Williams ha scritto:

> On 23 Nov 2006 04:09:18 -0800, Vania <vania.cIlli at gmail.com> wrote:
> > Hi, I'm not sure this is the proper forum but I try nevertheless.
> > The problem I'am facing is that the socket library always fail to
> > connect to an URL. The net effect is that I can not use setuptools.
> > I'm using Python2.4 on a windows XPPRO Sp2 machine.
> > The firewall is disabled.
> > There is no NLTM proxy.
> > I connect to the internet through a NAT server (and it works).
> > Other than with easy_install I tried to connect to a number of external
> > urls
> > (all of them running) and even to localhost,
> > directly in script using urllib
> > and the error is always the same errno:  10061 connection refused.
> > Any ideas?
>
> A socket can't connect to a URL, a URL is an absolute location of an
> internet resource, eg hostname + (virtual) location on a server + page
> name.  A socket can connect to an IP address or hostname - which is
> the first part of the URL after the "http://"  (or ftp:// etc)
> 
> You need to post a code snippet and the errors you are getting.



From martin at v.loewis.de  Tue Nov  7 13:11:47 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Nov 2006 19:11:47 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162922230.992249.52430@f16g2000cwb.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
Message-ID: <4550cc64$0$3462$9b622d9e@news.freenet.de>

Ross Ridge schrieb:
> The thread that shares it increments the reference count before passing
> its address to directly another thread or indirectly through a shared
> container.

To make a specific example, consider this fragment from
Objects/fileobject.c:

static PyObject *
file_repr(PyFileObject *f)
{
        if (PyUnicode_Check(f->f_name)) {
...

Now, assume there wasn't a GIL protecting this all, and also
assume f_name was a mutable member (which it currently isn't).

Then, this access wouldn't be thread-safe: This code roughly
translates to

    reg_x = f->f_name
    push reg_x
    call PyUnicode_Check (assuming this was a function and
    not a macro)

Meanwhile, another process might perform

    old = f->f_name;
    f->f_name = new;
    Py_DECREF(old);

i.e. change the file name. Now, it might be that they
interleave this way:

    reg_x = f->f_name
    old = f->f_name
    f->f_name = new
    Py_DECREF_old
    push reg_x
    call PyUnicode_Check

which would now operate on a deallocated object.

To fix this, one might think that we need

   Py_INCREF(f->f_name)
   if(Py_UnicodeCheck(f->f_name))
   ...
   Py_DECREF(f->f_name)

However, this would not help, because the
first incref translates to

   reg_x = f->f_name
   LOCK INC f->ob_refcnt

which again leaves a race condition where the
INCREF operation comes "too late".

How would you propose to fix file_repr to prevent such
a race condition?

Regards,
Martin


From fredrik at pythonware.com  Thu Nov  2 11:49:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 17:49:19 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162484302.234145.245320@e3g2000cwe.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>	<1162478431.624590.29290@m7g2000cwm.googlegroups.com>	<mailman.1667.1162483361.11739.python-list@python.org>
	<1162484302.234145.245320@e3g2000cwe.googlegroups.com>
Message-ID: <eid7ic$2og$1@sea.gmane.org>

elderic wrote:

> I never said that I need anything - I merely asked for alternatives. =)
> I'm pretty happy with the types-module or the callable() test.
> 
> Basically it's just for wrapping the creation of Tk-Buttons, etc.
> They need a callback and in my process to learn I wanted to know about
> the possible options to test for that.

the more reason not to even think about using anything but "callable". 
many things in Python are callable; an explicit function test would 
disallow several interesting alternatives:

 >>> def foo():
...     pass
...
 >>> class fum:
...     def bar(self):
...             pass
...     def __call__(self):
...             pass
...
 >>> type(foo) is type(fum)
False
 >>> f = fum()
 >>> type(foo) is type(f)
False
 >>> type(foo) is type(f.bar)
False

etc.

(and I really shouldn't ask why you cannot just use Tkinter, and spend 
your time and energy on something more worthwhile ?  if not else, there 
are plenty of Tk extensions that could need nice wrappers...)

</F>



From steve at holdenweb.com  Thu Nov 16 05:40:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 10:40:48 +0000
Subject: Python v PHP: fair comparison?
In-Reply-To: <1a2e01c7090d$f074cdc0$0301a8c0@tmesa.com>
References: <455ba1a9$0$4218$426a74cc@news.free.fr>
	<1a2e01c7090d$f074cdc0$0301a8c0@tmesa.com>
Message-ID: <ejhf54$lna$2@sea.gmane.org>

bruce wrote:
> ummm bruno...
> 
> you don't 'need' apache to run php.
> 
> in fact, although i'm from the old hard c/c++ world.... way before web apps,
> i haven't really found much for most general apps (not ui/not threaded
> stuff) that php can't do..

You simply haven't been looking hard enough.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From johnjsal at NOSPAMgmail.com  Thu Nov  9 15:10:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 09 Nov 2006 15:10:07 -0500
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.1984.1163090531.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
Message-ID: <45538b0d$0$26485$c3e8da3@news.astraweb.com>

Michael Hobbs wrote:

> Anyway, the FAQ answer seems to be a 
> weak argument to me.

I agree. I was expecting something more technical to justify the colon, 
not just that it looks better.


From sjmachin at lexicon.net  Wed Nov  1 16:07:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Nov 2006 13:07:12 -0800
Subject: CSV module, DictReader problem (bug?)
References: <eib0la$86i$1@newslocal.mitre.org>
Message-ID: <1162415232.190913.163240@m73g2000cwd.googlegroups.com>

Jeff Blaine wrote:
> It's been a year or so since I written Python code, so maybe
> I am just doing something really dumb, but...
>
> Documentation
> =============
>
> 	class DictReader(csvfile[,fieldnames=None,
>               [,restkey=None[, restval=None[, dialect='excel'
>               [, *args, **kwds]]]]])
>
>
> 	Create an object which operates like a regular reader
> 	but maps the information read into a dict whose keys
> 	are given by the optional fieldnames parameter. If the
> 	fieldnames parameter is omitted, the values in the
> 	first row of the csvfile will be used as the fieldnames.
>
> Code
> ====
>
> 	import csv
>
> 	r = csv.DictReader('C:\Temp\Book1.csv')

Problem 1:

"""csvfile can be any object which supports the iterator protocol and
returns a string each time its next method is called -- file objects
and list objects are both suitable. If csvfile is a file object, it
must be opened with the 'b' flag on platforms where that makes a
difference."""

So, open the file, so that the next() method returns the next chunk of
content, not the next byte in the name of the file.

Note that the arg is called "csvfile", not "csvfilename".

Problem 2: [OK in this instance, but that's like saying you have taken
one step in a minefield and are still alive] backslashes and Windows
file names:

If you were to write 'c:\temp\book1.csv', it would blow up ... because
\t -> tab and \b -> backspace. Get into the habit of *always* using raw
strings r'C:\Temp\Book1.csv' for Windows file names (and re patterns).
You could use double backslashing 'C:\\Temp\\Book1.csv' but it's
uglier.

> 	print r.next()
> 	# EOF
> 
> Output
> ======
> 
> 	{'C': ':'}

HTH,
John



From egbert.bouwman at hccnet.nl  Wed Nov 29 17:21:21 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Wed, 29 Nov 2006 23:21:21 +0100
Subject: SPE refuses.
In-Reply-To: <1164828687.755193.4900@l39g2000cwd.googlegroups.com>
References: <mailman.846.1164826327.32031.python-list@python.org>
	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>
Message-ID: <20061129222121.GA24634@hccnet.nl>

On Wed, Nov 29, 2006 at 11:31:27AM -0800, SPE - Stani's Python Editor wrote:
> If wxPython is rightly installed, which means that "import wx" works
> fine and "wx.VERSION" gives the right version, you can ignore the
> wxPython warning.
> 
In a Python shell the commands 'import wx' and 'wx.VERSION' give:
    (2,6,3,2,'')

> Please cd do your site-packages directory and do "python SPE.py
> --debug" and see the error message.

In gnome-terminal  /usr/lib/python2.4/site-packages/_spe
the command: 'python SPE.py --debug' produces the same error:
    You need to install at least wxPython v2.5.4.1 to run SPE.
    Get it from http://www.python.org

Well, I got it from the debian repositories.

e.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From clodoaldo.pinto at gmail.com  Wed Nov 15 07:17:01 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 15 Nov 2006 04:17:01 -0800
Subject: Problem reading with bz2.BZ2File(). Bug?
In-Reply-To: <mailman.191.1163592523.32031.python-list@python.org>
References: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>
	<mailman.191.1163592523.32031.python-list@python.org>
Message-ID: <1163593020.979114.73260@i42g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Clodoaldo Pinto Neto wrote:
>
> > The offending file is 5.5 MB. Sorry, i could not reproduce this problem
> > with a smaller file.
>
> but surely you can post the repr() of the last two lines?

This is the output:

$ python bzp.py
line number: 588317
'\x07'
''

Clodoaldo



From spe.stani.be at gmail.com  Wed Nov  1 10:31:26 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 1 Nov 2006 07:31:26 -0800
Subject: ANN: SPE 0.8.3.c Python IDE editor
In-Reply-To: <1162234468.199971.134690@m7g2000cwm.googlegroups.com>
References: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>
	<1162213852.270705.275740@b28g2000cwb.googlegroups.com>
	<1162234468.199971.134690@m7g2000cwm.googlegroups.com>
Message-ID: <1162395086.009206.45020@f16g2000cwb.googlegroups.com>

I checked the berlios site and it seems to be working. Or do you have
another problem?
Stani

Chris Seymour schreef:

> Hi Stani,
> Not able to reach Berlios.  The SourceForge page does not have the
> Windows installer.  Any ideas when it will be available?
>
> Thanks.
>
> Chris
> Bernard wrote:
> > thanks Stani!
> >
> > SPE - Stani's Python Editor wrote:
> > > This is a maintenance release (mostly bug fixing) to prove that SPE is
> > > alive and well! In case you are using wxPython2.7 you'll need to
> > > upgrade to this release. Submitted patches will be reviewed and
> > > included if approved for next release. Thanks for all your patient
> > > support and continuing donations.
> > >
> > > The SPE 0.8.2.a release got downloaded 110550 times on berlios and
> > > sourceforge together. Not bad. This means SPE has not seen an update
> > > for a while or is getting very popular. Maybe both ;-)
> > >
> > > Installers are available for python 2.3, 2.4 and 2.5 for Windows and as
> > > a rpm including wxPython. Other operating systems can choose the
> > > no-setup.zip or targ.gz archives. A .deb archive is being prepared for
> > > Debian Linux systems such as Ubuntu.
> > >
> > > wxGlade is unfortunately not compatible with wxPython2.7. So if you
> > > want to use, you'll need wxPython2.6.
> > >
> > > :**Fixes**:
> > >
> > > - output is now done with a fixed font
> > > - uml.py is now again a stand alone demo
> > > - upgraded and fixed wxGlade
> > > - fixed for wxPython2.7 (and still backwards compatible with
> > > wxPython2.6)
> > > - updated NotebookCtrl
> > >
> > > :**Contributors**:
> > >
> > > - Andrea Gavana (NoteBookCtrl)
> > > - Alberto Griggio (wxGlade)
> > > - Michael Foord (python 2.3 + 2.5 releases for windows)
> > >
> > > :**Donations**:
> > >
> > > The development of SPE is driven by donations. Each of these donors
> > > receives the pdf manual in thanks for their support of SPE.
> > >
> > > - James Carroll (60 euro)
> > > - John DeRosa (50 euro)
> > > - Fumph LLC (50 euro)
> > > - Ronald Britton (40 euro)
> > > - David Downes (40 euro)
> > > - Jorge Carrillo (40 euro)
> > > - Nicolas Berney (40 euro)
> > > - Francois Schnell (30 euro)
> > > - Olivier Cortes (30 euro)
> > > - Ayrshire Business Consulting Limited (30 euro)
> > > - Chris White (25 euro)
> > > - Thomas Wengerek (20 euro)
> > > - John Rudolph (20 euro)
> > > - Michael O'Keefe (20 euro)
> > > - Michael Brickenstein (20 euro)
> > > - Richard Walkington (20 euro)
> > > - Oliver Tomic (20 euro)
> > > - Jose Maria Cortes Arnal (20 euro)
> > > - Jeffrey Emminger (20 euro)
> > > - Eric Pederson (20 $)
> > > - Charles Bosson (15 euro)
> > > - Angelo Caruso (15 euro)
> > > - Chris Hengge (15 $)
> > > - Lo&#239;c Allys (15 euro)
> > > - Marcin Chojnowski (15 euro)
> > > - Boris Krasnoiarov (15 euro)
> > > - Paul Furber (15 euro)
> > > - Gary Robson (15 euro)
> > > - Ralf Wieseler (15 euro)
> > > - Samuel Schulenburg (10 euro)
> > > - Leland Hulbert II (10 euro)
> > > - Javier De La Mata Viader (10 euro)
> > > - Dorman Musical Instruments (10 euro)
> > > - Jaroslaw Sliwinski (10 euro)
> > > - Alessandro Patelli (10 euro)
> > > - James Pretorius (10 euro)
> > > - Richard Wayne Garganta (10 euro)
> > > - Maurizio Bracchitta (10 euro)
> > > - Larry Lynch (10 euro)
> > > - Kay Fricke (10 euro)
> > > - Henrik Binggl (10 euro)
> > > - Jerol Harrington (10 euro)
> > > - Victor Adan (10 euro)
> > > - James Fuqua (10 euro)
> > > - Christian Seberino (5 euro)
> > > - Serge Smeesters (5 euro)
> > > - Jarek Libert (5 euro)
> > > - Robin Friedrich (5 euro)
> > > - Udo Rabe (5 euro)
> > > - Roch Leduc (4 euro)
> > > - Rha Diseno y Desarrollo (2 euro)
> > >
> > > :**Installation**:
> > >
> > > - See http://pythonide.stani.be/manual/html/manual2.html
> > >
> > > :**Development**:
> > >
> > > - http://developer.berlios.de/mail/?group_id=4161
> > >
> > > About SPE:
> > > SPE is a python IDE with auto-indentation, auto completion, call tips,
> > > syntax coloring, uml viewer, syntax highlighting, class explorer,
> > > source index, auto todo list, sticky notes, integrated pycrust shell,
> > > python file browser, recent file browser, drag&drop, context help, ...
> > > Special is its blender support with a blender 3d object browser and its
> > > ability to run interactively inside blender. Spe integrates with XRCed
> > > (gui
> > > designer) and ships with wxGlade (gui designer), PyChecker (source
> > > code doctor), Kiki (regular expression console) and WinPdb (remote,
> > > multi-threaded debugger).
> > >
> > > The development of SPE is driven by its donations. Anyone who donates
> > > can ask for an nice pdf version of the manual without ads (74 pages).



From claureal81 at yahoo.it  Sat Nov 18 06:22:13 2006
From: claureal81 at yahoo.it (Ciad)
Date: 18 Nov 2006 03:22:13 -0800
Subject: MAKE GOOD MONEY BY INTERNET
Message-ID: <1163848933.731124.307470@e3g2000cwe.googlegroups.com>

You may have read these letters asking you to send $1 to 6
different addresses. Putting your home address on the internet can be
risky, but through PayPal all you have to provide is your email
address. Its safe and easy. Just go to use the link below and set up
your account! I am not a gullible person and have never trusted things
like this, but I gave it a try, hey its only $6, I figured at least 6
people would respond out of the millions of people that use the
internet. Go to Paypal now and sign up for a free PREMIER or BUSINESS
account, its easy to do (don't set up the PERSONAL ACCOUNT, with this
one you can't receive more then 200$) .
https://www.paypal.com/uk/mrb/pal=Q3WPRUS8V9LLE
How it Works--
HOW TO TURN $6 INTO $6,000+!!! THIS REALLY CAN MAKE YOU EASY MONEY!!
IT WORKS!!!
BUT YOU HAVE TO FOLLOW IT TO THE LETTER FOR IT TO WORK!!!!
A little while back, I was browsing through newsgroups, just like you
are
now and came across an article similar to this that said you could make

thousands dollars within weeks with only an initial investment of
$6.00! So I thought, "Yeah, right, this must be a scam," but like
most
of us, I was curious, so I kept reading. Anyway, it said that you send
$1.00 through Paypal to each of the emails stated in the article.
Then you place your own email address at the bottom of the list at #6.
After that send the article to all
your friends and relatives and post it in at least 200 news
groups(There are thousand). No
catch that was it. So after thinking it over, and talking to few people

first, I thought about trying it. I figured what have I got to lose
except $6.00, right? Like most of us I was a little skeptical and a
little worried about the legal aspects of it: It follows the same
regulations as the mailed "chain letters", which according to the U.S.
Post Office (1-800-725-2161) is indeed legal! Then I invested the
measly $6.00. Well GUESS WHAT!!?. Within 7 days, I started getting
money in my paypal account! I was shocked! I figured it would end soon,

but the money just kept coming in. In my first week, I made about
$20.00. By the end second week I had made a total over $1,200.00! In
the third week I had over $10,000.00 and it's still growing. This is
now my fourth week and I have made a total of just over $36,000.00 and
it's still coming in rapidly. It's certainly worth $6.00. Let me tell
you how this works
and most importantly, why it works? Also, make sure you print a copy of

this article NOW, so you can refer to it as you need to. REQUIREMENTS:
You must have a verified Premium or Business Paypal account. If you do
not have an account
you can use the link below and follow the instructions to set up a free

account. In order to place the initial $6 into your account, you will
have to verify your bank account with Paypal (which may take a few
days). Paypal is 100% secure and is used by millions of people world
wide.
https://www.paypal.com/uk/mrb/pal=Q3WPRUS8V9LLE
Directions
STEP 1: Send, through Paypal, $1.00 to each email on the list below.
Make the subject of the payment "Email List" and in the comments, write

"PLEASE PUT ME ON YOUR EMAIL LIST."(Ensure in this
page the 6 email addresses are completely shown because sometime some
web provider hide part of these against the spammers. Usually you have
just to click on the mail address for show it  ). What you are doing is
creating a
service by this and best of all you are not giving your address to
anyone you do not know. THIS IS ABSOLUTELY LEGAL!
The email list:
1) scarlett85us at yahoo.com
2) jrmlcb at yahoo.com
3) rogerrd34 at aol.com
4) notesfordeb at hotmail.com
5) claureal81 at yahoo.it
6) pmlbianchi at yahoo.com
STEP 2: Now take the #1 email off the list that you see above, move the

other addresses up (6 becomes 5, 5 becomes 4, etc.) and add YOUR email
address (the one used on the Paypal account) as number 6 on the list.
STEP 3: Change anything you need to, but try to keep this article as
close to original as possible. Now, send your amended article to all
email address you have and post it
in at
least 200 newsgroups message board, Chat Rooms, Etc. (I think there are

close to 32,000 groups) All you need is 200, but remember, the more you

post, the more money you make - as well as everyone else on the list!
DIRECTIONS--HOW TO POST TO NEWSGROUPS, MESSAGE BOARD
Step 1: You do not need to re-type this entire letter to do your own
posting. Simply select the text by putting your cursor at the top the
document and dragging it to the bottom. Then you select copy from the
edit menu.
Step 2: Open a blank 'notepad' (or any word processor program) file and

place your cursor at the top of the blank page. From the 'edit' menu
select 'paste'. This will paste a copy of the letter into notepad so
that you can add your name to the list.
Step 3: Save your new notepad file as a .txt file. If you want to do
your postings in different sittings, you'll always have this file to go

back to.
Step 4: Log on to your favorite search engine and search any of the
following : on-line forums, message boards, chat sites, discussions.
Just for example here are some search engines: yahoo.com, google.com,
altavista.com, excite.com. You then search with the following subjects:

millionaire message board, money making message board, employment
message board, money making discussions, money making forum, business
message board etc. You will find thousand & thousand message boards.
Click one by one then you will find the option to post a new message.
Step 5: Visit these message boards and post this article as a new
message by highlighting the text of this letter and selecting paste
from the edit menu. Fill in the Subject, this will be the header that
everyone sees as they scroll through the list of postings in a
particular group. Give your header a catchy phrase. Then click the post

message button. You're done with your first one!. Congratulations!
THAT'S IT! All you have to do is jump to different newsgroups and post
away, after you get the hang of it, it will only take about 30 seconds
for each newsgroup!
REMEMBER, THE MORE NEWSGROUPS OR MESSAGE BOARDS YOU POST IN, THE MORE
EMAILS YOU SEND, THE MORE
MONEY YOU WILL MAKE!! BUT YOU HAVE TO POST A MINIMUM OF 200. That's it!

You will begin receiving money within days! JUST MAKE SURE THE EMAIL
YOU SUPPY IS EXACTLY AS IT APPEARS ON PAYPAL.
Now the WHY part: Out of 200 postings, say I receive only 5 replies (a
very low example). So then I Made $5.00 with my name at #6 on the
letter. Now, each of the 5 persons who just sent me $1.00 make the
MINIMUM 200 postings, each with my name at #5 and only 5 persons
respond to each of the original 5, that is another $25.00 for me, now
those 25 each make 200 MINIMUM posts with my name at #4 and only 5
replies each, I will bring in an additional: $125.00! Now, those 125
persons turn around and post the MINIMUM 200 with my name at #3 and
only receive 5 replies each, I will make an additional $625.00! OK, now

here is the fun part: Each of those 625 persons post a MINIMUM 200
posts with my name at #2 and they only receive 5 replies that just
made me $3,125.00!!! Those 3,125 persons will all deliver this message
to 200 newsgroups with my name at #1 and if still 5 persons per 200
newsgroups react I will receive $15,625.00! With an original investment

of only $6.00! AMAZING!
When your name is no longer on the list, you just take the latest
posting in the newsgroups, and send out another $6.00 to names on the
list, putting your name at number 6 again. And start posting again. The

thing to remember is, do you realize that thousands of people all over
the world are joining the internet and reading these articles everyday,

JUST LIKE YOU are now!! So can you afford $6. And see if it really
works?? I think so? People have said, 'What if the plan is played out
and no one sends you: the money? So what are the chances of that
happening when there are tons of new honest users and new honest people

who are joining the internet and newsgroups everyday and are willing to

give it a try? Estimates are at 20,000 to 50,000 new users, every day,
with thousands of those joining the actual Internet. Remember, if
everyone plays FAIRLY and HONESTLY this will work.
Sincerely, 
J. R. M. L. C. R.



From amichail at gmail.com  Wed Nov  8 01:25:10 2006
From: amichail at gmail.com (Amir  Michail)
Date: 7 Nov 2006 22:25:10 -0800
Subject: unpickling Set as set
Message-ID: <1162967110.642248.54400@m7g2000cwm.googlegroups.com>

Hi,

Is there an easy way to unpickle the older Set as the newer set behind
the scenes when using shelve?

Amir



From mail at microcorp.co.za  Thu Nov  2 02:23:56 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 2 Nov 2006 09:23:56 +0200
Subject: report progress from C function
References: <1162336313.895048.202440@k70g2000cwa.googlegroups.com><20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>
	<eia90r$d4d$1@sea.gmane.org>
Message-ID: <024201c6fe5f$dc0fa980$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> Michael S wrote:
> 
> > I downloaded Pyrex and ran it through their own
> > example. The code looks quite messy, and I even saw a
> > few "goto"s. 
> 
> looked at the assembler output from your C compiler lately?
> 
> </F>

 LOL! -  is it even possible to code an if else without conditional jumps?

- Hendrik



From fredrik at pythonware.com  Sat Nov 11 03:05:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 09:05:45 +0100
Subject: Tkinter: How do I change the actual width of a widget?
In-Reply-To: <1163201725.520487.176030@i42g2000cwa.googlegroups.com>
References: <1163201725.520487.176030@i42g2000cwa.googlegroups.com>
Message-ID: <ej408s$srd$1@sea.gmane.org>

Mudcat wrote:

> I am trying to change the width of a widget based on pixel size and not
> on characters. I can't figure out how to do this.
> 
> Normally to change to the size of a widget it looks like:
> 
> widget.configure(width = x)
> 
> However that is in characters, not in pixels. To retrieve the actual
> size of a widget, I believe it is done with:
> 
> x = widget.winfo_width()
> 
> Obviously that value can not be used in the configure statement. Is
> there a way to dynamically change the width (and height) of a widget
> using the winfo data?

look for "pack_propagate" on this page for one way to do it:

     http://effbot.org/tkinterbook/button.htm

</F>



From Roberto.Bonvallet at cern.ch  Fri Nov 10 12:21:12 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Fri, 10 Nov 2006 17:21:12 +0000 (UTC)
Subject: SyntaxError: Invalid Syntax.
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>
	<1163178581.231837.18120@h48g2000cwc.googlegroups.com>
Message-ID: <ej2ce8$vsc$1@cernne03.cern.ch>

ronrsr wrote:
> thanks for the speedy answer.  what i meant was:
> 
> return   MySQLdb.connect (host = "db91b.pair.com",
>                           user = "homebase",
>                            passwd = "Newspaper2",
>                        db = "homebase_zingers"
>                           );
> 
> 
> but even when I have that, I still get the same error.

Could you please copy and paste the exact code that is triggering the
error, and the exact error message?

(BTW, in Python you don't need to end your statements with a semi-colon)
-- 
Roberto Bonvallet


From anthra.norell at vtxmail.ch  Thu Nov  2 07:17:47 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 02 Nov 2006 13:17:47 +0100
Subject: unescape HTML entities
In-Reply-To: <eibea7$m77$1@sea.gmane.org>
References: <ei0add$man$1@sea.gmane.org> <45449EAC.4070103@vtxmail.ch>
	<eibea7$m77$1@sea.gmane.org>
Message-ID: <4549E1EB.1030205@vtxmail.ch>

Rares Vernica wrote:
> Hi,
>
> Nice module!
>
> I downloaded 2.3 and I started to play with it. The file names have 
> funny names, they are all caps, including extension.
>
> For example the main module file is "SE.PY". Is you try "import SE" it 
> will not work as Python expects the file extension to be "py".
>
> Thanks,
> Ray
>
> Frederic Rentsch wrote:
>   
>> Rares Vernica wrote:
>>     
>>> Hi,
>>>
>>> How can I unescape HTML entities like "&nbsp;"?
>>>
>>> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
>>> "&lt;", and "&gt;".
>>>
>>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>>> dictionary is the opposite of what I need, it does not have "&nbsp;".
>>>
>>> It has to be in python 2.4.
>>>
>>> Thanks a lot,
>>> Ray
>>>
>>>       
>> One way is this:
>>
>>  >>> import SE                                                      # 
>> Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
>>  >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
>> HTM2ISO.se is included
>> 'output_file_name'
>>
>> For repeated translations the SE object would be assigned to a variable:
>>
>>  >>> HTM_Decoder = SE.SE ('HTM2ISO.se')
>>
>> SE objects take and return strings as well as file names which is useful 
>> for translating string variables, doing line-by-line translations and 
>> for interactive development or verification. A simple way to check a 
>> substitution set is to use its definitions as test data. The following 
>> is a section of the definition file HTM2ISO.se:
>>
>> test_string = '''
>> &oslash;=(xf8)   #  248  f8
>> &ugrave;=(xf9)   #  249  f9
>> &uacute;=(xfa)   #  250  fa
>> &ucirc;=(xfb)    #  251  fb
>> &uuml;=(xfc)     #  252  fc
>> &yacute;=(xfd)   #  253  fd
>> &thorn;=(xfe)    #  254  fe
>> &#233;=(xe9)
>> &#234;=(xea)
>> &#235;=(xeb)
>> &#236;=(xec)
>> &#237;=(xed)
>> &#238;=(xee)
>> &#239;=(xef)
>> '''
>>
>>  >>> print HTM_Decoder (test_string)
>>
>> ?=(xf8)   #  248  f8
>> ?=(xf9)   #  249  f9
>> ?=(xfa)   #  250  fa
>> ?=(xfb)    #  251  fb
>> ?=(xfc)     #  252  fc
>> ?=(xfd)   #  253  fd
>> ?=(xfe)    #  254  fe
>> ?=(xe9)
>> ?=(xea)
>> ?=(xeb)
>> ?=(xec)
>> ?=(xed)
>> ?=(xee)
>> ?=(xef)
>>
>> Another feature of SE is modularity.
>>
>>  >>> strip_tags = '''
>>    ~<(.|\x0a)*?>~=(9)               # one tag to one tab
>>    ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
>> |                                   # run
>>    "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
>>    ~\t+~=(32)                       # one or more tabs to one space
>>    ~\x20\t+~=(32)                   # one space and one or more tabs to 
>> one space
>>    ~\t+\x20~=(32)                   # one or more tab and one space to 
>> one space
>> '''
>>
>>  >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
>> Order doesn't matter
>>
>> If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
>> together with HTM2ISO.se:
>>
>>  >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
>> Order doesn't matter
>>
>> Or, if you have two SE objects, one for stripping tags and one for 
>> decoding the ampersands, you can nest them like this:
>>
>>  >>> test_string = "<p class=MsoNormal 
>> style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
>> para&icirc;t plus &acirc;g&eacute;. </p>"
>>
>>  >>> print Tag_Stripper (HTM_Decoder (test_string))
>>   Ren? est un gar?on qui para?t plus ?g?.
>>
>> Nesting works with file names too, because file names are returned:
>>
>>  >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
>> 'output_file_name'
>>
>>
>> Frederic
>>
>>
>>
>>     
>
>   
Arrrgh!

Did it again capitalizing extensions. We had solved this problem and 
here we have it again. I am so sorry. Fortunately it isn't hard to 
solve, renaming the files once one identifies the problem, which you 
did. I shall change the upload within the next sixty seconds.

Frederic

I'm glad you find it useful.




From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 08:39:44 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 00:39:44 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
	<pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>
	<mailman.2084.1163229430.11739.python-list@python.org>
Message-ID: <pan.2006.11.11.13.39.39.253916@REMOVE.THIS.cybersource.com.au>

On Sat, 11 Nov 2006 01:13:03 -0600, Ron Adam wrote:

> Steven D'Aprano wrote:
>> On Fri, 10 Nov 2006 21:24:50 +0100, Bjoern Schliessmann wrote:
>> 
>>> Marc 'BlackJack' Rintsch wrote:
>>>
>>>> No it doesn't -- look again at the example given above.  It's
>>>> legal syntax in Python but doesn't have the semantics implied by
>>>> the example.
>>> Sorry, I don't understand -- what is the difference between the
>>> example as it is and the implied semantics of it?
>> 
>> Inform 6 "x == blue or red or yellow" is equivalent to the Python
>>  
>> x == blue or x == red or x == yellow
> 
> Maybe it should have been expressed as:
> 
>      x == (blue or red or yellow)


But that has very different semantics still -- since parentheses have the
highest priority, it means "evaluate (blue or red or yellow), then test if
x is equal to the result".

It might be useful on occasion to have a construct for "x equals blue or
red or yellow" in the sense used by normal English or Inform 6. And,
funnily enough, Python has such a construct. You just have to write "in"
instead of ==, and use a tuple for the terms:

x in (blue, red, yellow)

Not hard to remember, and unambiguous.


-- 
Steven.



From jeremit0 at gmail.com  Thu Nov  2 10:32:37 2006
From: jeremit0 at gmail.com (jeremito)
Date: 2 Nov 2006 07:32:37 -0800
Subject: string formatter for tuple
Message-ID: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>

I have the following in my code

a = (1,2,3)
print "a = %s" %a

But when I run this, I get:

TypeError: not all arguments converted during string formatting

Now I realize why this happens, a is actually 3 elements when the print
statement is only expecting to print one value.  I tried

print "a = %s" %(a)

but I got the same error.

How can I print a tuple with a single string format?
Thanks,
Jeremy



From p.lavarre at ieee.org  Fri Nov 10 00:25:24 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 21:25:24 -0800
Subject: to Doctest as SystemExit is to Python
Message-ID: <1163136324.202924.165630@k70g2000cwa.googlegroups.com>

> From: http://docs.python.org/lib/doctest-soapbox.html ...
> Regression testing is best confined to dedicated objects or files ...

Can I somehow tell doctest that it's time to quit?

I ask because not all doctest examples are created equal.  Some
failures are catastrophic, making all subsequent failures at least
uninteresting, and maybe painfully slow.  Other failures are
negligible, making the print of any subsequent failure valuable.

So sys.exit() doesn't do what I mean: it raises SystemExit, but doctest
redefines the SystemExit exception to mean print a traceback, rather
than meaning to exit quietly after a noisily catastrophic failure,
exiting almost as if the doctest had passed.

And doctest.REPORT_ONLY_FIRST_FAILURE doesn't do what I mean: it prints
only the first failure, always, never the valuable subsequent failures.

Can doctest somehow be persuaded to do the right thing?  That is, to
exit after a catastrophic failure, but not after a negligible failure,
and not after an independent failure?

In the last Python I shipped, to get the effect of exit after
catastrophe, I actually faked a run of doctest:

print 'Expected:'
print "    '...'"
print 'Got:'
print "    " + repr(result)
print '***Test Failed***'
sys.exit(-1)

Surely that's wrong?  Somehow not idiomatic Python?

Surely I can somehow tell doctest that my code has just realised,
sorry, it is time to quit?

Thanks in advance, Pat LaVarre



From soring at gmail.com  Sat Nov  4 20:30:42 2006
From: soring at gmail.com (soring at gmail.com)
Date: 4 Nov 2006 17:30:42 -0800
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
	<pan.2006.11.04.13.50.50.713078@gmx.net>
	<32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
	<mailman.1767.1162650166.11739.python-list@python.org>
Message-ID: <1162690242.646530.23220@h54g2000cwb.googlegroups.com>

CORBA may work fine in an intranet environment, where you can control
the server and the client, but it clearly failed to be a popular choice
on the internet: have you seen any company offering webservices with a
CORBA interface??
The main 2 choices that companies offering webservices seem to have are
REST (Yahoo, Amazon, Google) and SOAP (Amazon, Google).

And no, SOAP is not a Microsoft thing anymore: it's a standard
supported by a lot of large companies (and neither Amazon nor Google
are Microsoft shops, as far as I know).
The reason SOAP moved away from the pure RPC model is because it needed
to support the more modern and flexible distributed computing paradigm
which is "message based", not "RPC based".

But yeah, I fully agree that SOAP is very complicated, and the support
for it is pretty poor.

Sorin

Steve Holden wrote:
> Jorge Vargas wrote:
> > On 11/4/06, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> >
> >>In <mailman.1762.1162647487.11739.python-list at python.org>, Jorge Vargas
> >>wrote:
> >>
> >>
> >>>and please please don't go to corba we need to kill that.
> >>
> >>Have you real reasons or is this a religious thing?  As I see it Corba is
> >>much better supported by Python libs than SOAP is.
> >>
> >
> > I see ZSI as a very good engine for SOAP as for xmlrpc it's "better"
> > since you can interact with a browser and then you can even have json
> > rpc.
> >
> > but yes ur right is mostly because of religious reasons :)
> >
> When SOAP can do everything that Corba can do, and as efficiently, it
> might stand a chance of displacing it. I see SOAP as essentially an ugly
> bloated NIH response of the Microsoft camp to an open specification that
> achieved all its goals in an elegant way. And all to allow inappropriate
> remote-method execution through port 80 to avoid the corporate firewall.
> Which ultimately just made firewalling port 80 that much more difficult.
>
> Microsoft is a poor church, and very uncaring of its adherents. So take
> your religious reasons and leave Corba alone until SOAP is an effective
> competitor ;-)
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From vincent.arnoux at rfo.atmel.com  Wed Nov 29 11:26:15 2006
From: vincent.arnoux at rfo.atmel.com (Vincent Arnoux)
Date: Wed, 29 Nov 2006 17:26:15 +0100
Subject: Reading GDSII layouts
In-Reply-To: <1164735963.999050.300530@45g2000cws.googlegroups.com>
References: <mailman.796.1164712312.32031.python-list@python.org>
	<1164735963.999050.300530@45g2000cws.googlegroups.com>
Message-ID: <200611291726.15940.vincent.arnoux@rfo.atmel.com>

Le mardi 28 novembre 2006 18:46, Jacob Rael a ?crit?:
> Funny, I started writing one this past weekend as a learning exercise
> (handling large files and start to use classes). If ipkiss does not
> work out, let me know specifically what you need and maybe my hack will
> work.
>
> jr

Well, if you know how to extract cell names and references from a GDSII 
layout, that would be usefull. Perhaps can you send me your code if you don't 
mind and I will try to do something from it ?

Vincent




From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 14:35:58 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 19:35:58 GMT
Subject: forwarding *arg parameter
In-Reply-To: <eilc3m$301a$1@ulysses.news.tiscali.de>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
	<eilc3m$301a$1@ulysses.news.tiscali.de>
Message-ID: <y2r3h.244$7b6.238@read3.inet.fi>

Stargaming wrote:
> Either you take one of the snippets here:
> http://aspn.activestate.com/ASPN/search?query=flatten&section=PYTHONCKBK&type=Subsection 
> 
> or just use arg[0] clever (as mentioned a few times in this thread).

Thanks. My solution became:

 >>> def flattern(arg):
...     result = []
...     for item in arg:
...         if isinstance(item, (list, tuple)):
...             result.extend(flattern(item))
...         else:
...             result.append(item)
...     return tuple(result)
...
 >>> def g(*arg):
...     arg = flattern(arg)
...     return arg
...
 >>> def f(*arg):
...     return g(arg)
...
 >>> f('foo', 'bar')
('foo', 'bar')

TV


From rw at smsnet.pl  Wed Nov 29 10:22:51 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: 29 Nov 2006 07:22:51 -0800
Subject: Detecting recursion loops
In-Reply-To: <ekk6qu$po0$1@news.albasani.net>
References: <ekk6qu$po0$1@news.albasani.net>
Message-ID: <1164813771.171053.93190@j44g2000cwa.googlegroups.com>


robert wrote:
> My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
> What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?

What about `sys.setrecursionlimit`?

http://docs.python.org/lib/module-sys.html

-- 
HTH,
Rob



From larry.bates at websafe.com  Mon Nov  6 17:10:20 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 06 Nov 2006 16:10:20 -0600
Subject: assigning values in __init__
In-Reply-To: <454faf57$0$12993$c3e8da3@news.astraweb.com>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <Tq6dnYTmJdBaL9LYnZ2dnUVZ_tydnZ2d@comcast.com>

John Salerno wrote:
> Let's say I'm making a game and I have this base class:
> 
> class Character(object):
> 
>     def __init__(self, name, stats):
>         self.name = name
>         self.strength = stats[0]
>         self.dexterity = stats[1]
>         self.intelligence = stats[2]
>         self.luck = stats[3]
> 
> Is this a good way to assign the values to the different attributes?
> Should 'stats' be a list/tuple (like this), or should I do *stats instead?
> 
> I'm trying to think ahead to when I might want to add new attributes,
> and I want to make sure this doesn't get crazy with individual
> parameters instead of just the one list.
> 
> Or maybe there's some way to loop through two lists (the stats and the
> attributes) and assign them that way? I was thinking of a nested for
> statement but that didn't seem to work.

Sounds like what you should be doing is something like keyword arguments
instead.

class Character(object):
    def __init__(self, name, **kwargs):
        self.name=name
        for key, value in kwargs.items():
            setattr(self, key, value)


z=Character('name', strength=10, dexterity=5, intelligence=3, luck=0)

Now you can easily introduce new keyword arguments.

-Larry


From gagsl-py at yahoo.com.ar  Wed Nov 15 20:53:18 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 22:53:18 -0300
Subject: Python v PHP: fair comparison?
In-Reply-To: <1a6e01c7091c$34212470$0301a8c0@tmesa.com>
References: <455bad51$0$26230$426a74cc@news.free.fr>
	<1a6e01c7091c$34212470$0301a8c0@tmesa.com>
Message-ID: <7.0.1.0.0.20061115224716.06181e58@yahoo.com.ar>

At Wednesday 15/11/2006 22:11, bruce wrote:

>interesting ongoing thread...
>
>i've seen a number of these over the years.. my language is better than your
>language!!
>
>i'm sure this question on the php list would have findings/results that are
>essentially opposite of what is being discussed here!

Sure. But after you realize that a language is just a tool to 
complete a task, most of the discussions are meaningless. The 
original post didn't say "python is better than php", and I think the 
comparison is rather fair.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From assaflavie at gmail.com  Wed Nov  1 08:28:20 2006
From: assaflavie at gmail.com (Assaf Lavie)
Date: 1 Nov 2006 05:28:20 -0800
Subject: authenticated https post
In-Reply-To: <mailman.1592.1162386154.11739.python-list@python.org>
References: <1162385421.870142.8680@h48g2000cwc.googlegroups.com>
	<mailman.1592.1162386154.11739.python-list@python.org>
Message-ID: <1162387700.222826.249960@f16g2000cwb.googlegroups.com>

I think that library is obsolete. It uses http, instead of https.

On Nov 1, 3:00 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> assaf wrote:
> > I'm trying to use Python to work with del.icio.us's API.
> > Basically, I need to be able to do a simple https post, with
> > username/password authentication.
> > (For those interested, the del.icio.us API is here:
> >http://del.icio.us/help/api/)
>
> > I can't for the life of me find a simple https example code that
> > works... I'm working on Windows, btw, if that makes any difference.tried  http://code.google.com/p/pydelicious/?
>
> (it's linked from the "useful things that other people have made"
> section on del.icio.us' help page, just above the "developers" section
> where you found that api link).
> 
> </F>



From agriff at tin.it  Tue Nov  7 03:06:24 2006
From: agriff at tin.it (Andrea Griffini)
Date: Tue, 07 Nov 2006 09:06:24 +0100
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162854476.903789.5550@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
	<1162854476.903789.5550@b28g2000cwb.googlegroups.com>
Message-ID: <45503dab$0$13758$4fafbaef@reader3.news.tin.it>

John Machin wrote:

> Indeed yourself.

What does the above mean ?

> Have you ever considered reading posts in
> chronological order, or reading all posts in a thread?

I do no think people read posts in chronological order;
it simply doesn't make sense. I also don't think many
do read threads completely, but only until the issue is
clear or boredom kicks in.

Your nice "double whammy" post was enough to clarify
what happened to the OP, I just wanted to make a bit
more explicit what you meant; my poor english also
made me understand that you were just "suspecting"
such an error, so I verified and posted the result.

That your "suspect" was a sarcastic remark could be
clear only when reading the timewise "former" reply
that however happened to be lower in the thread tree
in my newsreader; fact that pushed it into the "not
worth reading" area.

> It might help
> you avoid writing posts with non-zero information content.

Why should I *avoid* writing posts with *non-zero*
information content ? Double whammy on negation or
still my poor english kicking in ? :-)

Suppose you didn't post the double whammy message,
and suppose someone else made it seven minutes later
than your other post. I suppose that in this case
the message would be a zero content noise (and not
the precious pearl of wisdom it is because it
comes from you).

> Cheers,
> John

Andrea


From fredrik at pythonware.com  Sat Nov 18 05:37:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 11:37:49 +0100
Subject: How can I speed this function up?
In-Reply-To: <1163845246.702167.16380@h48g2000cwc.googlegroups.com>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<1163845246.702167.16380@h48g2000cwc.googlegroups.com>
Message-ID: <ejmnpt$ku5$1@sea.gmane.org>

nnorwitz at gmail.com wrote:

> Generally, don't create objects, don't perform repeated operations.  In
> this case, batch up I/O.
> 
>> def write_data1(out, data):
>>      for i in data:
>>          if i[0] is 'ELEMENT':
>>              out.write("%s %06d " % (i[0], i[1]))
>>              for j in i[2]:
>>                  out.write("%d " % (j))
>>              out.write("\n")
> 
> def write_data1(out, data, map=map, str=str):
>      SPACE_JOIN = ' '.join
>      lines = [("ELEMENT %06d " % i1) + SPACE_JOIN(map(str, i2))
>               for i0, i1, i2 in data if i0 == 'ELEMENT']
>      out.write('\n'.join(lines))
> 
> While perhaps a bit obfuscated, it's a bit faster than the original.
> Part of what makes this hard to read is the crappy variable names.  I
> didn't know what to call them.  This version assumes that data will
> always be a sequence of 3-element items.
> 
> The original version took about 11.5 seconds, the version above takes
> just over 5 seconds.

footnote: your version doesn't print the final "\n".  here's a variant 
that do, and leaves the batching to the I/O subsystem:

def write_data3(out, data, map=map, str=str):
      SPACE_JOIN = ' '.join
      out.writelines(
	 "ELEMENT %06d %s\n" % (i1, SPACE_JOIN(map(str, i2)))
               for i0, i1, i2 in data if i0 == 'ELEMENT'
	 )

this runs exactly as fast as your example on my machine, but uses less 
memory.  and if you, for benchmarking purposes, pass in a "sink" file 
object that ignores the data you pass it, it runs in no time at all ;-)

</F>



From no-spam at no-spam-no-spam.invalid  Fri Nov 24 09:45:53 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 15:45:53 +0100
Subject: fast listdir & stat
Message-ID: <ek70j3$nqp$1@news.albasani.net>

I want to get the files and sizes and times etc. stats of a dir fast.
os.listdir & iterating with os.stat seems not to run at optimal speed for network folders. Is there a faster possibility? (both for Win & *nix ; best platform independent)


Robert


From jstroud at mbi.ucla.edu  Tue Nov 21 19:33:00 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 22 Nov 2006 00:33:00 GMT
Subject: Trying to understand Python objects
In-Reply-To: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <0VM8h.17686$B31.14012@newssvr27.news.prodigy.net>

walterbyrd wrote:
> Reading "Think Like a Computer Scientist" I am not sure I understand
> the way it describes the way objects work with Python.
> 
> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?

Not all objects behave this way. For example, incidences of the object 
class:

py> j = object()
py> j.att = 2
------------------------------------------------------------
Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
<type 'exceptions.AttributeError'>: 'object' object has no attribute 'att'

Strangely enough, the exact rule is difficult to infer from the behavior 
of cPython:

py> def doit():
...   pass
...
py> doit.att = 2
py> doit.att
2
py> type(j)
<type 'object'>
py> type(doit)
<type 'function'>

Instances of your own classes and the classes you define yourself behave 
as you describe, though:

py> class C: pass
...
py> C.classatt = 2
py> C.classatt
2
py> c = C()
py> c.instat = 5
py> c.instat
5


> 2) Are classes typically created like this:
> 
> class Point:
>   pass

Its better for classes to descend from object, actually:

py> class Point(object): pass
...
py> type(Point)
<type 'type'>
py> type(C)
<type 'classobj'>

'type' type classes behave correctly with certain language features, 
such as properties. Last I checked 'classobj' classes do not. So 
new-style ('type' type) classes are preferred.

> Then attributes are added at some other time?

Yes. This goes for old (clasobj) and new style classes.

> 3) What is with the __underscores__ ??

They are hard to look at, but they are meant to signify implementation 
specific attributes of objects and not interface specific attributes. 
But, in my opinion, a lot of python code, especially "higher-level" code 
blurs the distinction, so it becomes a little underscore heavy.

> 4) Are parameters passed to an class definition?
> 
> class Whatever(params):
>    pass

No.

This is done under the implementation specific method called "__init__".

py> class D(object):
...   def __init__(self, param1, param2):
...     self.a = param1
...     self.b = param2
...
py> d = D(2,5)
py> d.a
2
py> d.b
5

> I sort-of understand the way objects work with PHP. With PHP, the
> classes are defined in one place - sort of like a function. To me, that
> makes more sense.

The difference (and I don't know PHP) is that many of the objects you 
create (classes and instances of those classes) are "mutable". Which 
means, of course that you can change them. I've found that good 
programming practice requires less of this mutability in general (i.e. 
adding attributes on the fly), but it is there if you need it. I think 
this flexibility is part the python philosophy, but I am not a python 
philosopher (nor was I meant to be).

James


-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From deets at nospam.web.de  Mon Nov 13 11:05:43 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Nov 2006 17:05:43 +0100
Subject: Python development time is faster.
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>
Message-ID: <4rrjenFspqicU2@mid.uni-berlin.de>

> Oh, the memories... I went down the same road about two years ago,
> though I didn't know about PyLucene at the time and wrapped in jython
> the parts of Lucene I used... never bothered to deal with java's
> verbosity after that. It's a pity that jython resembles abandon-ware
> these days, when jRuby showed up pretty recently and is gaining in
> penetration with the java crowd. It will be a non-trivial loss for
> python if it is left behind in the JVM world (at least if the latter is
> not swallowed by the .NET dark forces, which doesn't seem to happen any
> time soon ;-).

I wouldn't consider jython abandonware. It is under active development, and
I'm using a 2.2 alpha successful for quite a while now - which usually
serves my needs.

The problem is/was that new-style classes were a major hurdle to take, and
this now seems to be conquered. So lets hope (or contribute code....:P)
that jython will see a 2.4 version ASAP.

diez


From p.m.deandraderodrigues at gmail.com  Wed Nov  8 10:38:03 2006
From: p.m.deandraderodrigues at gmail.com (Pedro Rodrigues)
Date: Wed, 8 Nov 2006 16:38:03 +0100
Subject: Help solving Python 2.5 crash: The instruction "0x7c168f1d"
	referenced memory at "0x00000001c
In-Reply-To: <5a00f6240611080650i78ee03eawf716e358ca221bab@mail.gmail.com>
References: <5a00f6240611080650i78ee03eawf716e358ca221bab@mail.gmail.com>
Message-ID: <26195e840611080738q17af56afn4a41a7a4940359db@mail.gmail.com>

Hi Bugra,

thanks for your reply. I did try the same code on a Windows 2000 system
where I also installed and later removed Python 2.5. There, I obtained the
same problem :( That's why I think it has to do with software. I've also
searched on the internet and this problem seems to come up also with other
sorts of applications. This lead me to think that there might be some
inconsistency in the Registry of Windows or some files that have been left
behind after uninstall. I've tried to address these two possibilities but so
far I did not succeed :(

pedro


On 11/8/06, Bugra Cakir <bugracakir at gmail.com> wrote:
>
> Hi,
>
> I have came across this like problem in my simulations also. But the case
> is not for the program structure or
> python version, the case is hardware :) . If you have time to try it on
> some other machine than the current and
> if the problem arises then there is something different!
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
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From E.Doxtator at gmail.com  Wed Nov 15 18:08:10 2006
From: E.Doxtator at gmail.com (E.Doxtator at gmail.com)
Date: 15 Nov 2006 15:08:10 -0800
Subject: pyRTF and Footers
Message-ID: <1163632090.351315.19480@h48g2000cwc.googlegroups.com>

Hi All

I've been using the pyRTF module to generate some documents that I need
for work.  In general, the module is good, and pretty simple to use.
However, I am running into a problem with footers that doesn't quite
make sense to me.

My question is this:  Is it possible to change the text of a footer
throughout an RTF document?

The data that I am using to produce my document is organized in a
simple header/detail relationship.  The document I want to produce
looks roughly like this:

---------------------------
USER001

detail data line 1
detail data line 2
detail data line 3

page footer that says "USER001, plus some other information"

**page break**

USER002

detail data line 1
detail data line 2
detail data line 3

page footer that says "USER002, plus some other information"

**page break**

USERnnn

detail data line 1
detail data line 2
detail data line 3

page footer that says "USERnnn, plus some other information"

END OF DOCUMENT

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

I've gotten everything the way I want, except for the footer.  The
footer appears on the first page, but not on any other page.

The code that generates the footer is (apologies in advance for poor
style):

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

def MakeFooter(self, facilitatir, startDate, endDate, tuID):
   section = Section()

   self.doc.Sections.append( section )

   p = Paragraph(  "%s - %s (%s - %s)" % ( facilitator, tuID,
startDate, endDate ), LINE )
   p.append( 'Page', PAGE_NUMBER, ' of ', TOTAL_PAGES )
   section.Footer.append( p )

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

The logic that calls MakeFooter is:

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

   tuDoc = MakeTUDoc()
   DR = Renderer()

   for i in range( start, end + 1 ):
      key = "Traininguser%03d" % ( i )
      tuDoc.MakeFooter( facilitator, startDate, endDate, key )
      tuDoc.MakeHeader( key, module )
      < code to populate the document with detail data >

   DR.Write( tuDoc.doc, tuDoc.OpenFile( 'JUNK' ) )

   print( 'DONE!' )

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

(Note:  the MakeHeader() method doesn't put an actual RTF header in the
document-- it just puts text in a Heading1 format into a section at the
top of the page, before the detail data.)

I had a look at the RTF 1.5 specification
(http://www.biblioscope.com/rtf15_spec.htm), and regarding headers and
footers and it's pretty thin.  I didn't see anything in the
specification regarding support for changing footer text throughout the
document.  Nothing in there that said I could do it, either.

Any ideas, anyone?

Thanks in advance.  This is an extremely helpful discussion group.

-Doc



From gagsl-py at yahoo.com.ar  Fri Nov 24 21:11:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 23:11:07 -0300
Subject: windows background process
In-Reply-To: <1164243932.585949.202250@b28g2000cwb.googlegroups.com>
References: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
	<1164243932.585949.202250@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061124230841.03446c88@yahoo.com.ar>

At Wednesday 22/11/2006 22:05, Podi wrote:

>Some update...
>
>I just found out that the following seems to work,
>
>import subprocess
>subprocess.Popen(' myargs', executable='mycmd.exe')
>
>However, it does not work with "my path\\mycmd.exe"
>
>subprocess.Popen(' myargs', executable='"my path\\mycmd.exe"') # error

Same as before, executable should be the first argument, so it's seldom used.
Try subprocess.Popen((full_path_to_mycmd, full_path_to_mycmd, arg1, arg2))


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From Jack.Andrews at boeing.com  Wed Nov 22 01:18:13 2006
From: Jack.Andrews at boeing.com (EXI-Andrews, Jack)
Date: Wed, 22 Nov 2006 16:18:13 +1000
Subject: re.match -- not greedy?
Message-ID: <750FA239330A7E4CA15D456F37DFF8AE02500B0C@XCH-AU-01.au.nos.boeing.com>

>> I wrote:
>>
>>>>>> import re;re.match('(a+)(ab)','aaab').groups()
>>> ('aa', 'ab')
>>> 
>>> this is the sort of behaviour i'd expect from 
>>>    '(a+?)(ab)'
>>> 
>>> a+ should greedily consume a's at the expense of the string
>>> not matching
>
> Fredrick wrote:
> that's a misunderstanding of what a regular expression is, though: 
> conceptually, a RE describes a set of strings, and the RE engine is 
> designed to answer the question "does this string belong to this
> set".

if that's so, what is the point of +? and *?   (?)

seems to me it's a bit more pragmatic than pure set membership



jack


From wescpy at gmail.com  Thu Nov  9 04:28:52 2006
From: wescpy at gmail.com (wesley chun)
Date: Thu, 9 Nov 2006 01:28:52 -0800
Subject: ANN: BayPIGgies, Thu Nov 9 @ 7:30p, Air Traffic Control
Message-ID: <78b3a9580611090128m2fb0279ai554c54a32d51a6a9@mail.gmail.com>

the silicon valley-san francisco bay area python users group meets at
the Googleplex once a month in mountain view, CA.
more info and directions available at http://baypiggies.net


---------- Forwarded message ----------
From: Dennis Reinhardt
Date: Nov 2, 2006 9:03 PM
To: Python <baypiggies at python.org>

Thursday Nov. 9, 2006

7:30-8:50 p.m.   Technical Program
------------------------------------
Title          Python for Prototyping in Air Traffic Control
Presenter      Russ Paielli (NASA Ames Research)
About the talk The talk will start with a high-level overview of the US air
traffic control system, then it will focus on tactical (i.e., short range)
conflict alerting and describe the prototype software that we are
developing to replace the legacy software that currently performs that
function. Examples of actual "operational errors" will be presented, and
the alerting performance of our system will be tested and compared with the
legacy system. The rationale for using Python for the prototype and its
testing will be briefly discussed.

8:50 p.m-...    Mapping and Random Access
------------------------------------------
Mapping Moderator  Dennis Reinhardt (DAIR Computer Systems)
Mapping is a rapid-fire audience announcement open to all of topic headings
(one speaker at a time). Random Access session (everyone breaks up into
self-organized small-group discussion) follows immediately after Mapping.


From __peter__ at web.de  Sun Nov  5 08:05:54 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 05 Nov 2006 14:05:54 +0100
Subject: finding the list of the matched strings
References: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
Message-ID: <eiknj8$bbq$01$3@news.t-online.com>

jm.suresh at no.spam.gmail.com wrote:

> Hi, I have a list of strings. And I want to find the subset which
> matches a particular regular expression.
> 
> import re
> ll = ('a', 'b', 's1', 's2', '3s')
> p = re.compile('^s.*')
> newList = filter(lambda s: p.match(s), ll)

or

newList = [s for s in ll if p.match(s)]

> I suppose there should be simple function to do this in re module. Is
> there any?

No.

Peter


From irmen.NOSPAM at xs4all.nl  Mon Nov  6 20:05:07 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 07 Nov 2006 02:05:07 +0100
Subject: Pyro stability
In-Reply-To: <1162783631.291535.221530@f16g2000cwb.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
Message-ID: <454fdbc5$0$335$e4fe514c@news.xs4all.nl>

writeson wrote:
> Irmen,
> 
> Thanks, you're very good about answering Pyro related questions!

Well, I do have an advantage here, being Pyro's author... :)

--Irmen


From gagsl-py at yahoo.com.ar  Thu Nov  9 22:48:35 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 00:48:35 -0300
Subject: pack a three byte int
In-Reply-To: <1163128122.036554.163610@f16g2000cwb.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<1163121855.884088.12970@h48g2000cwc.googlegroups.com>
	<mailman.2015.1163124094.11739.python-list@python.org>
	<1163128122.036554.163610@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061110003949.0597b988@yahoo.com.ar>

At Friday 10/11/2006 00:08, p.lavarre at ieee.org wrote:

> > > >>> import binascii
> > > >>> cdb = binascii.unhexlify('%02X%06X%02X%02X' % (0x08, 
> 0x12345, 0x80, 0))
> > > >>> binascii.hexlify(cdb)
> > >'080123458000'
> >
> > The only problem I can see is that this code is endianness-dependent;
> > the suggested versions using pack(">...") not. But this may not be of
> > concern to you.
>
>Thanks for cautioning us.  I suspect we agree:
>
>i) pack('>...') can't say three byte int.
>ii) binascii.hexlify evals bytes in the order printed.
>iii) %X prints the bytes of an int in big-endian order.
>iv) struct.unpack '>' of struct.pack '<' flips the bytes of an int
>v) struct.unpack '<' of struct.pack '>' flips the bytes of an int
>vi) [::-1] flips a string of bytes.

Yes to all.

>In practice, all my lil-endian structs live by the C/Python-struct-pack
>law requiring the byte size of a field to be a power of two, so I can
>use Python-struct-pack to express them concisely.  Only my big-endian
>structs are old enough to violate that recently (since ~1972)
>popularised convention, so only those do I construct with
>binascii.unhexlify.

So you would have no problems. I stand corrected: the code above will 
always generate big-endian numbers.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ppgoogle at tberg.net  Sun Nov 26 08:32:01 2006
From: ppgoogle at tberg.net (i)
Date: 26 Nov 2006 05:32:01 -0800
Subject: Ruby/Python/REXX as a MUCK scripting language
In-Reply-To: <2006112418112116807-zobeid@techiecom>
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <1164547921.815762.114940@f16g2000cwb.googlegroups.com>

Tony Belding skrev:

> I'm interested in using an off-the-shelf interpreted language as a
> user-accessible scripting language for a MUCK.  I'm just not sure if I
> can find one that does everything I need.  The MUCK must be able to
> call the interpreter and execute scripts with it, but the interpreter
> must also be able to call functions in the MUCK code.  And then there's
> the security issue that really worries me. . .  I have to be able to
> limit what the interpreter can execute.  I can't have my users running
> scripts that access the console, access the filesystem or sockets
> directly, or call libraries or other binaries outside the MUCK.
>
> Is this practical?  I'm thinking of Ruby or Python for this, if they
> can meet the requirements.
>
> I might even consider REXX. . .  I remember ARexx from my Amiga days,
> and how great it was for string manipulation and application scripting.
>  However. . .  My immediate target platform, Mac OS X, comes with Ruby
> and Python but not REXX, so that's a disadvantage.
>
> My final option would be to create my own language interpeter where I
> have control over everything that happens.  That is what MUCKs have
> always done in the past.  But the result was always quirky, limited
> languages like MUF (Multi-User Forth) which really turn off a lot of
> coders.  Furthermore, I've never created a language before, and it
> would be a lot of extra work for me.
>
> --
> Tony Belding, Hamilton Texas

Regina REXX har a "restricted mode", but it doesn't allow external
calls so this is probably not a solution for You.  Nevertheless, here
is an excerpt from the manual about that mode:

"2.6.3Regina Restricted Mode
Many language interpreters provide a mechanism where code executed
within that interpreter is
limited to affecting the environment of the interpreter and cannot
change the external environment
in which the interpreter runs.
Restricted mode is used in situations where you need to guarantee that
the author of a Rexx
program is unable to affect the user's environment.
Situations where a restricted mode is applicable include, using Regina
as a database procedural
language, or as a language plug-in for a Web browser.
Features of Regina that are disabled in restricted mode are:
?  LINEOUT, CHAROUT, POPEN, RXFUNCADD BIFs
?  "OPEN WRITE", "OPEN BOTH" subcommands of STREAM BIF
?  The "built-in" environments eg. SYSTEM, CMD or PATH of ADDRESS
command
?  Setting the value of a variable in the external environment with
VALUE BIF.
?  Calling external functions
To run Regina in restricted mode, you can start the Regina interpreter
from the command line with
the '-r' switch, or when using the Rexx SAA API, or-ing RXRESTRICTED to
the CallType
parameter of RexxStart() function."

Thomas Berg



From fredrik at pythonware.com  Thu Nov 16 02:50:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 08:50:52 +0100
Subject: Yield
In-Reply-To: <1163659530.752607.120880@m73g2000cwd.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
Message-ID: <ejh58v$muu$1@sea.gmane.org>

olive wrote:

>> http://docs.python.org/ref/yield.html
> 
> This is a perfect example that demonstrate how the actual python is bad
> and most of the time useless (at least for me).

there's a place for (relatively) formal reference documentation, but 
it's hardly ever the right place to learn why things are there, or how 
they are supposed to be used.

> We really need mor example !
> 
> I would like to thanks Fredrik for his contribution to improve that.

thanks!

(for the curious, my current plan is to use

     http://effbot.org/zone/idea-seealso.htm

files to link from the official documentation to tutorials, example 
collections, and blog articles.  I encourage content producers to start 
looking into generating such files for their document collections.)

</F>



From bearophileHUGS at lycos.com  Sat Nov 25 14:45:39 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Nov 2006 11:45:39 -0800
Subject: Graph Data Structures
In-Reply-To: <1164465588.399198.173830@f16g2000cwb.googlegroups.com>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
Message-ID: <1164483939.464327.143450@f16g2000cwb.googlegroups.com>

Szabolcs Nagy:
> i haven't read your code, but there are many graph implementations in
> python.
> in case you haven't found these yet:
> http://wiki.python.org/moin/PythonGraphApi
>
> if you only want to do some analysis i think you need this one (as it's
> pretty complete and simple):
> https://networkx.lanl.gov/
>
> i also recommend Guido's essay to read:
> http://www.python.org/doc/essays/graphs.html

I can also suggest my one:
http://sourceforge.net/projects/pynetwork/

And boost graph bindings for Python, quite fast:
http://www.osl.iu.edu/~dgregor/bgl-python/

Bye,
bearophile



From darran at edmstudio.com  Sat Nov 18 19:13:30 2006
From: darran at edmstudio.com (darran)
Date: 18 Nov 2006 16:13:30 -0800
Subject: Finding skilled pythonistas for micro-jobs?
Message-ID: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>

I'm a partner in a design and technology studio that creates
large-scale interactive exhibits for museums.  We are agile - by
choice.   For big 6-12 month projects, we try and secure exceptional
python talent on contract.  The python job board addresses this need.

Every few weeks though I run up against a bite-sized programming
problem begging to be farmed out by our small company.  The tasks
themselves span the gamut from data wrangling (format conversions) to
SWIG wrappers to Twisted to pyOpenGL.  Often the task is 1 or 2 days of
work.  Not really big enough to warrant a job search, a contract, or
even someone's full-time attention.  The type of problem that is
perfectly suited to a CS student or daytime programmer looking to make
some extra money.  Presently, when one of these jobs pops up, I just
add 8-16 hours to my work week - much to the dismay of my 3-year old
daughter who'd rather I pay someone and go to the park.  The nice thing
though about our bite-sized jobs is that the goals are perfectly clear
because we are religious in our use of unit testing and test-driven
development.

Any suggestions then for locating skilled Python/C++ programmers for
these small (micro) jobs?  

Cheers,
Darran.



From nogradi at gmail.com  Wed Nov 22 06:37:59 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 22 Nov 2006 12:37:59 +0100
Subject: text file parsing (awk -> python)
Message-ID: <5f56302b0611220337j5aeef3afy59d34919d7e9064a@mail.gmail.com>

Hi list,

I have an awk program that parses a text file which I would like to
rewrite in python. The text file has multi-line records separated by
empty lines and each single-line field has two subfields:

node 10
x -1
y 1

node 11
x -2
y 1

node 12
x -3
y 1

and this I would like to parse into a list of dictionaries like so:

mydict[0] = { 'node':10, 'x':-1, 'y':1 }
mydict[1] = { 'node':11, 'x':-2, 'y':1 }
mydict[2] = { 'node':12, 'x':-3', 'y':1 }

But the names of the fields (node, x, y) keeps changing from file to
file, even their number is not fixed, sometimes it is (node, x, y, z).

What would be the simples way to do this?


From bignose+hates-spam at benfinney.id.au  Wed Nov 22 18:12:22 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 23 Nov 2006 10:12:22 +1100
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<45643a6f$0$7761$426a74cc@news.free.fr>
	<1164206156.302934.183510@b28g2000cwb.googlegroups.com>
Message-ID: <87y7q3uld5.fsf@benfinney.id.au>

"walterbyrd" <walterbyrd at iname.com> writes:

> Is there some book, or other reference, that explains of this? I was
> thinking about "Python for Dummies." The "Think like a Computer
> Scientist" book, and "Dive into Python" book don't seem to explain
> Python's object model clearly enough for me.

The canonical introduction is the Python tutorial::

    <URL:http://docs.python.org/tut/>

To get benefit from this, you should *work through* this document, not
merely read it. Do each exercise and don't go on until you believe you
understand what it's doing.

-- 
 \     "When I turned two I was really anxious, because I'd doubled my |
  `\   age in a year. I thought, if this keeps up, by the time I'm six |
_o__)                               I'll be ninety."  -- Steven Wright |
Ben Finney



From gagsl-py at yahoo.com.ar  Tue Nov 21 19:28:00 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 21:28:00 -0300
Subject: Trying to understand Python objects
In-Reply-To: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061121205307.058bd8f8@yahoo.com.ar>

At Tuesday 21/11/2006 20:03, walterbyrd wrote:

>1) Can attributes can added just anywhere? I create an object called
>point, then I can add attributes any time, and at any place in the
>program?

For "normal" python objects, yes, you can add/delete any attribute, 
anytime, anywhere. There are hooks where you can actively deny 
attribute creation, or "freeze" the attribute list, but these are 
considered advanced usage.

>2) Are classes typically created like this:
>
>class Point:
>   pass
>
>Then attributes are added at some other time?

Not "typically"! Although you *can* do that, doesn't mean that you 
*must* do things that way.
A 2D point might say:

class Point2D(object):
   def __init__(self, x, y):
     self.x = x
     self.y = y

   def distance(self, other):
     return math.hypot(other.x-self.x, other.y-self.y)

p0 = Point2D(3, 2)
p1 = Point2D(0, 6)
p0.distance(p1) # gives 5

>3) What is with the __underscores__ ??

Names that begin and end in __ are used by Python itself and have 
some "magic" attached sometimes. The most common is __init__ (used to 
initialize a new instance). __str__ by example, is used to get an 
object's textual representation suitable for printing. If you execute
 >>> print p0
using the example above, you'll get something like <Point2D instance 
at 0x12345678>. Add the following to the Point2D class and you get a nice pair:

   def __str__(self):
     return '(%f, %f)' % (self.x, self.y)

>4) Are parameters passed to an class definition?
>
>class Whatever(params):
>    pass

If you see something like that, "params" are not parameters, but base 
classes. The Whatever class inherits all attributes and methods known 
to its bases, and may provide its own.

>I sort-of understand the way objects work with PHP. With PHP, the
>classes are defined in one place - sort of like a function. To me, that
>makes more sense.

Usually in Python you also define a class in only one place - you 
*can* modify it later, and that's a powerful feature, but certainly 
you don't have to!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From jorge.vargas at gmail.com  Sat Nov  4 10:36:44 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sat, 4 Nov 2006 15:36:44 +0000
Subject: WSDL?
In-Reply-To: <eii7mt$mvm$1@sea.gmane.org>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
	<pan.2006.11.04.13.50.50.713078@gmx.net>
	<32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
	<eii7mt$mvm$1@sea.gmane.org>
Message-ID: <32822fe60611040736w501c03c0n2d9ee09966a0316c@mail.gmail.com>

On 11/4/06, Steve Holden <steve at holdenweb.com> wrote:
> Jorge Vargas wrote:
> > On 11/4/06, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> >
> >>In <mailman.1762.1162647487.11739.python-list at python.org>, Jorge Vargas
> >>wrote:
> >>
> >>
> >>>and please please don't go to corba we need to kill that.
> >>
> >>Have you real reasons or is this a religious thing?  As I see it Corba is
> >>much better supported by Python libs than SOAP is.
> >>
> >
> > I see ZSI as a very good engine for SOAP as for xmlrpc it's "better"
> > since you can interact with a browser and then you can even have json
> > rpc.
> >
> > but yes ur right is mostly because of religious reasons :)
> >
> When SOAP can do everything that Corba can do, and as efficiently, it
> might stand a chance of displacing it. I see SOAP as essentially an ugly
> bloated NIH response of the Microsoft camp to an open specification that
> achieved all its goals in an elegant way. And all to allow inappropriate
> remote-method execution through port 80 to avoid the corporate firewall.
> Which ultimately just made firewalling port 80 that much more difficult.
>
I have to disagree WSDL is a great standard and SOAP is great for
transfering data from point a to point b. and it's very usefull for
giving an interface for people to use like all those web2.0 api's out
there.

I agree on setting a server on port 80 to be a problem but that's a
deployment issue I have never set a SOAP server on port 80 myself.

> Microsoft is a poor church, and very uncaring of its adherents. So take
> your religious reasons and leave Corba alone until SOAP is an effective
> competitor ;-)
>
I'm sorry it's probably that I have seen some many bad Corba
implementations at work that I just hate them. I recently found out
that gnome applets are implemented on top of Corba and I'm very
impress.

> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From ptmcg at austin.rr._bogus_.com  Thu Nov  9 02:14:34 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 09 Nov 2006 07:14:34 GMT
Subject: Question regarding lists and regex
References: <mailman.1959.1163053812.11739.python-list@python.org>
Message-ID: <uzA4h.2674$rG.2599@tornado.texas.rr.com>

"Prabhu Gurumurthy" <pgurumur at gmail.com> wrote in message 
news:mailman.1959.1163053812.11739.python-list at python.org...
> Here is a simple program, which queries /var/log/daemon on my OpenBSD box 
> and gets the list of valid ntp peers.
>
> Questions:
> what is the easiest way for me to create lists on the fly, by that I mean 
> like perl
>
> push my @foo, something_from_say_stderr. The reason is as you can ip = 
> [""] statement before the for loop, I want to avoid that and use list 
> within the second ip loop, where I extract the ip address. Am I confusing?
>

Typically, one initializes a list to be empty, that is [], not [""].  Python 
will not read your mind at append time and think "oh! we're appending to a 
list and we forgot to create one in the first place, let's make one now."  I 
guess Perl allows this, but the clarity of including the initialization 
statement overrules the convenience of leaving it out.

> regex: I presume this is rather a dumb question, anyways here it comes! as 
> you can see from my program, pattIp = r\d{1,3}\.... etc, is there any 
> other easy way to group the reptitions, instead of typing the same regex 4 
> times.
>

Here's one way, tested at the Python command line:
>>> print r'\.'.join( [r'\d{1,3}']*4 )
\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}

This avoids the pattern duplication, but I think using join is much less 
easily recognized as a pattern for an IP address.

> TIA
> Prabhu
>

Some other comments/free advice:
1. I was curious about this line:
    pid = int(re.sub(r'\[|\]', "", pidMatch.group()))
You already know pidMatch.group() is going to start with a '[', followed by 
an integer string, and end with a ']', otherwise it wouldn't have matched 
pidPatt.  Instead of whacking this with another re-type call, how about just 
some simple string slicing:
    pid = pidMatch.group()[1:-1]

2. No real need to keep count of the found ip's, just use len(ip) to tell 
you how many entries there are in the list (especially once you convert to 
intializing with an empty list).

3. Similarly, you'll be able to remove the 'if len(x)' test when printing 
out the contents of the ip list if you init with [] instead of [""].  Also, 
the Python idiom for testing if x is the empty string is usually just 'if 
x', not 'if len(x)'.

-- Paul




From hannibal.holm at gmail.com  Fri Nov  3 10:23:05 2006
From: hannibal.holm at gmail.com (hannibal.holm at gmail.com)
Date: 3 Nov 2006 07:23:05 -0800
Subject: refcounting errors???
In-Reply-To: <mailman.1710.1162553943.11739.python-list@python.org>
References: <1162491997.320068.243850@h48g2000cwc.googlegroups.com>
	<mailman.1710.1162553943.11739.python-list@python.org>
Message-ID: <1162567385.273737.271200@k70g2000cwa.googlegroups.com>

Bingo, that works.

Thanks!

Fredrik Lundh wrote:
> hannibal.holm at gmail.com wrote:
>
>
> > The invokation of the foo-function goes somewhere in the line of:
> >
> >            PyObject *up = PyBool_FromLong(1L);
> >            if (! up) PyErr_Print();
> >
> >            PyObject *res = PyObject_CallFunction(action.u.button.u.s,
> > "(NIH)",
> 
> what happens if you use "(OIH)" instead ?
> 
> </F>



From laurent.pointal at wanadoo.fr  Wed Nov 15 15:22:55 2006
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Wed, 15 Nov 2006 21:22:55 +0100
Subject: Python-2.5.exe?
References: <v8H6h.15$895.11@newsfe04.lga>
Message-ID: <455b76ef$0$27377$ba4acef3@news.orange.fr>

Andrew Burton wrote:

> What Python is best for installing to a USB Drive?  I've actually got
> 2.5 on a drive, but I forget which installation package I used. 

Maybe this one ? http://www.voidspace.org.uk/python/movpy/

> It 
> seems to me that it was an EXE file, but I cannot seem to find one of
> those today.
> 
> Can the Python-2.5.msi installation files from python.org be installed
> so as not to touch the registry, to make them portable?

It seems movpy can install Python2.5 on an USB Key.

A+

Laurent.



From nick at craig-wood.com  Tue Nov 28 09:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 28 Nov 2006 08:30:03 -0600
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
	<EpUah.4144$ql2.4140@newsread3.news.pas.earthlink.net>
Message-ID: <slrnemohfg.4d8.nick@irishsea.home.craig-wood.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>  On Tue, 28 Nov 2006 04:30:09 -0600, Nick Craig-Wood
> <nick at craig-wood.com> declaimed the following in comp.lang.python:
> 
> > 
> > If you run this
> > 
> >   import os,sys,time
> >   print os.getpid()
> >   sys.stdout = open(os.devnull, 'w')
> >   time.sleep(60)
> > 
> > It prints its pid.
> >
>  	I would hope so, as you performed the print BEFORE reassigning
>  stdout...

That is what I intended.  I wanted the pid to look in /proc/<pid>/fd
to see what file descriptors were really open.

>  import os,sys,time
>  print "pre:", os.getpid()
>  sys.stdout = open(os.devnull, 'w')
>  print "post:", os.getpid()
>  time.sleep(60)
> 
>  (Granted, I'm on WinXP; I also suspect the original stdout is still open
>  in the background, maybe dualled with stderr?)

Yes that is the point - the original stdout is still open.

I don't think this discussion is relevant to windows though - windows
has its own way of making daemons.

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


From fredrik at pythonware.com  Thu Nov 16 10:55:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 16:55:37 +0100
Subject: Will subprocess eventually deprecate popen2 ?
References: <uk1pl2tese9uuoelkmoj18bc438amplo6b@4ax.com>
Message-ID: <eji1lp$5d2$1@sea.gmane.org>

Daniel Klein wrote:

>I have a few Python programs that use popen2, and they work quite
> nicely and dependably, so I don't really have any reason to change
> them to use the new subprocess module...unless of course there any
> future plans to deprecate popen2.

definitely not in the 2.X series.  as for 3.X, nobody knows -- but chances
are that even if the low-level support for popen2 disapperas, Python will
ship with a popen2 implementation that delegates to subprocess.

or you can write such an adapter yourself, the day you'll find that you want
to upgrade to a fancy new Python version that doesn't have it.  it'll take you
30 seconds:

    http://docs.python.org/lib/node539.html

</F> 





From paul at boddie.org.uk  Thu Nov 30 06:50:01 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 30 Nov 2006 03:50:01 -0800
Subject: why would anyone use python when java is there?
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164818505.696250.264070@h54g2000cwb.googlegroups.com>
	<mailman.877.1164885636.32031.python-list@python.org>
Message-ID: <1164887401.610800.190370@f1g2000cwa.googlegroups.com>

Richie Hindle wrote:
> [Adam]
> > For the life of me I can't understand why he would troll
> > comp.lang.python when comp.lang.lisp is there.
>
> +1 QOTW!

Overruled! ;-)

Mostly because comp.lang.lisp seems to have become a much better place
to get quotes of the week about Python than comp.lang.python itself. If
there was a meta-QOTW or something like that then perhaps a +1 would be
deserved. :-)

Paul



From gabor at nekomancer.net  Thu Nov 16 16:05:19 2006
From: gabor at nekomancer.net (gabor)
Date: Thu, 16 Nov 2006 22:05:19 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
Message-ID: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>

hi,

from the documentation (http://docs.python.org/lib/os-file-dir.html) for 
os.listdir:

"On Windows NT/2k/XP and Unix, if path is a Unicode object, the result 
will be a list of Unicode objects."

i'm on Unix. (linux, ubuntu edgy)

so it seems that it does not always return unicode filenames.

it seems that it tries to interpret the filenames using the filesystem's 
encoding, and if that fails, it simply returns the filename as byte-string.

so you get back let's say an array of 21 filenames, from which 3 are 
byte-strings, and the rest unicode strings.

after digging around, i found this in the source code:

> #ifdef Py_USING_UNICODE
>                 if (arg_is_unicode) {
>                         PyObject *w;
> 
>                         w = PyUnicode_FromEncodedObject(v,
>                                         Py_FileSystemDefaultEncoding,
>                                         "strict");
>                         if (w != NULL) {
>                                 Py_DECREF(v);
>                                 v = w;
>                         }
>                         else {
>                                 /* fall back to the original byte string, as
>                                    discussed in patch #683592 */
>                                 PyErr_Clear();
>                         }
>                 }
> #endif

so if the to-unicode-conversion fails, it falls back to the original 
byte-string. i went and have read the patch-discussion.

and now i'm not sure what to do.
i know that:

1. the documentation is completely wrong. it does not always return 
unicode filenames
2. it's true that the documentation does not specify what happens if the 
filename is not in the filesystem-encoding, but i simply expected that i 
get an Unicode-exception, as everywhere else. you see, exceptions are 
ok, i can deal with them. but this is just plain wrong. from now on, 
EVERYWHERE where i use os.listdir, i will have to go through all the 
filenames in it, and check if they are unicode-strings or not.

so basically i'd like to ask here: am i reading something incorrectly? 
or am i using os.listdir the "wrong way"? how do other people deal with 
this?

p.s: one additional note. if you code expects os.listdir to return 
unicode, that usually means that all your code uses unicode strings. 
which in turn means, that those filenames will somehow later interact 
with unicode strings. which means that that byte-string-filename will 
probably get auto-converted to unicode at a later point, and that 
auto-conversion will VERY probably fail, because the auto-convert only 
happens using 'ascii' as the encoding, and if it was not possible to 
decode the filename inside listdir, it's quite probable that it also 
will not work using 'ascii' as the charset.


gabor


From sjdevnull at yahoo.com  Wed Nov  1 09:59:23 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 1 Nov 2006 06:59:23 -0800
Subject: best way to check if a file exists?
In-Reply-To: <mailman.1606.1162392331.11739.python-list@python.org>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
	<mailman.1597.1162389697.11739.python-list@python.org>
	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>
	<mailman.1606.1162392331.11739.python-list@python.org>
Message-ID: <1162393163.497688.89240@m7g2000cwm.googlegroups.com>

Ben Finney wrote:
> "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
>
> > Ben Finney wrote:
> > > "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
> > > > You could try to read the file, if that fails it doesn't exist:
> > >
> > > Except that there are other conditions than "File doesn't exist"
> > > that can cause an 'open' to fail.
> >
> > Ok, true. You can test explicit on non existence as follows, and then
> > decide to open the file
>
> Or you can simply use 'os.path.exists', as has been suggested several
> times in this thread.

The O_CREAT|O_EXCL method pointed out elsethread is preferrable,
checking with "exists" and then creating if it returns false is racey.



From sven.dahlstrand at gmail.com  Thu Nov  9 17:11:53 2006
From: sven.dahlstrand at gmail.com (Sven)
Date: 9 Nov 2006 14:11:53 -0800
Subject: urlretrieve get file name
Message-ID: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>

Hi guys and gals,

I'm wrestling with the urlretrieve function in the urllib module. I
want to download a file from a web server and save it locally with the
same name. The problem is the URL - it's on the form
http://www.page.com/?download=12345. It doesn't reveal the file name.
Some hints to point me in the right direction are greatly appreciated.

Sven



From robert.kern at gmail.com  Sat Nov 11 21:55:00 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 11 Nov 2006 20:55:00 -0600
Subject: reduce to be removed?
In-Reply-To: <1163297976.786873.124350@m73g2000cwd.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2126.1163296784.11739.python-list@python.org>
	<1163297976.786873.124350@m73g2000cwd.googlegroups.com>
Message-ID: <ej62ej$9iq$1@sea.gmane.org>

Dustan wrote:
> Robert Kern wrote:
>> Dustan wrote:
>>> Fredrik Lundh wrote:
>>>> if you care about writing robust code, why not just use a for-loop,
>>>> and the list extend method?
>>> Because I'm embedding this expression in a list comprehension (as I
>>> stated in my original post), and last time I checked, it's not possible
>>> to treat a for-loop as an expression (which is what a list
>>> comprehension requires).
>> As with all such things, you stick the implementation in a well-named function
>> and simply call the function everywhere. The implementation never needs to be a
>> one-liner expression.
> 
> It's already in a function, but in order to convert the reduce function
> into a for-loop that I can use as an expression, I would have to create
> another independent function, which would make that code more cluttered
> than it already is.
> 
> Unless you're saying to perform the list comprehension manually. That
> would be two for-loops I use in the list comprehension, plus another
> one to take place of the reduce function. Sure, that spreads out each
> individual step a little more, but it also makes it more difficult to
> understand what the overall goal of the code is (I'm going for
> readability as well as easy maintenance here).

Let's just say that we disagree entirely on what constitutes readability and
maintainability.

-- 
Robert Kern

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



From e0427417 at student.tuwien.ac.at  Tue Nov 21 16:39:09 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Tue, 21 Nov 2006 22:39:09 +0100
Subject: Note about getattr and '.'
In-Reply-To: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
References: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
Message-ID: <45637197$0$12642$3b214f66@tunews.univie.ac.at>

szport at gmail.com wrote:
> There is an interesting skewness in python:
> 
> class A(object): pass
> 
>>>> a=A()
>>>> setattr(a, '$foo', 17)
>>>> getattr(a, '$foo')
> 17
> 
> But I can't write 
>>>> a.'$foo'
> 

Yes, this is known. I think IronPython uses a specialized dictionary for members, which prohibits 
malformed names. I don't know if there will be such a dictionary in any future CPython version. 
(Would be good.)

	panzi


From arkanes at gmail.com  Thu Nov 30 14:19:59 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Nov 2006 13:19:59 -0600
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <456F2C1D.8070803@gmx.net>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<456F2C1D.8070803@gmx.net>
Message-ID: <4866bea60611301119q76bd314cla30ade83bb414f9@mail.gmail.com>

On 11/30/06, Thomas Ploch <Thomas.Ploch at gmx.net> wrote:
> John Henry schrieb:
> > If I have a list of say, 10 elements and I need to slice it into
> > irregular size list, I would have to create a bunch of temporary
> > variables and then regroup them afterwords, like:
> >
> > # Just for illustration. Alist can be any existing 10 element list
> > a_list=("",)*10
> > (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> > alist=(a,)
> > blist=(b,)
> > clist=(c1,c2,c3)
> > dlist=(d2,d3,d4,d5)
> >
> > That obviously work but do I *really* have to do that?
> >
> > BTW: I know you can do:
> > alist=a_list[0]
> > blist=a_list[1]
> > clist=a_list[2:5]
> > dlist=a_list[5:]
> >
> > but I don't see that it's any better.
> >
> > Can I say something to the effect of:
> >
> > (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work
> >
> > ??
> >
> > I am asking this because I have a section of code that contains *lots*
> > of things like this.  It makes the code very unreadable.
> >
> > Thanks,
> >
>
> Nothing in your code actually __is__ a list. they are all tuples...
> A list is:
> aList = [a,b,c1,c2,c3,d1,d2,d3,d4,d5]
>

True but not relevant, really, he should have said "sequence". But
more importantly,
you don't show what you do with alist, blist,clist,dlist. Without
knowing what the end result is, nobody is going to be able to help you
eliminate the middle steps.

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


From john106henry at hotmail.com  Fri Nov 17 14:47:12 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 11:47:12 -0800
Subject: remove a list from a list
In-Reply-To: <mailman.369.1163792062.32031.python-list@python.org>
References: <ejkv1u$ajf$1@sea.gmane.org><455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org> <455E0A20.9000509@tim.thechases.com>
	<mailman.369.1163792062.32031.python-list@python.org>
Message-ID: <1163792832.404528.187950@k70g2000cwa.googlegroups.com>

from sets import Set as set   # Python 2.3

b = list( set([i.upper() for i in b) - set([i.upper() for i in a] ) )


Rares Vernica wrote:
> Yeah, I ended up doing a similar kind of loop. That is pretty messy.
>
> Is there any other way?
>
> Thanks,
> Ray
>
> Tim Chase wrote:
> >> That is a nice solution.
> >>
> >> But, how about modifying the list in place?
> >>
> >> That is, l would become ['c', 'D'].
> >>
> >>>  >>> e = ['a', 'b', 'e']
> >>>  >>> l = ['A', 'a', 'c', 'D', 'E']
> >>>  >>> s = set(e)
> >>>  >>> [x for x in l if x.lower() not in s]
> >>> ['c', 'D']
> >
> >
> > Well...changing the requirements midstream, eh? ;-)
> >
> > You can just change that last item to be a reassignment if "l" is
> > all you care about:
> >
> >  >>> l = [x for x in l ...]
> >
> > Things get a bit hairier if you *must* do it in-place.  You'd
> > have to do something like this (untested)
> >
> > for i in xrange(len(l), 0, -1):
> > 	if l[i-1].lower() in s:
> > 		del l[i-1]
> > 
> > 
> > which should do the job.
> > 
> > -tkc
> > 
> > 
> >



From m_tayseer82 at yahoo.com  Wed Nov  8 15:15:52 2006
From: m_tayseer82 at yahoo.com (Mohammad Tayseer)
Date: Wed, 8 Nov 2006 12:15:52 -0800 (PST)
Subject: tkFileDialog
In-Reply-To: <8094b1b60611081154g12d3d26et2eb59137226d56e2@mail.gmail.com>
Message-ID: <1754.3926.qm@web31113.mail.mud.yahoo.com>

use askopenfilename() instead of askopenfile()


> ********************************************
> import tkFileDialog
> file = tkFileDialog.askopenfile()
> print file
> ********************************************


 
---------------------------------
Access over 1 million songs - Yahoo! Music Unlimited.
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From noah.rawlins at comcast.net  Mon Nov 13 20:42:24 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Mon, 13 Nov 2006 20:42:24 -0500
Subject: Unpacking sequences and keywords in one function call
In-Reply-To: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
References: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
Message-ID: <nNmdnervt49hg8TYnZ2dnUVZ_rOdnZ2d@comcast.com>

ram wrote:
> Stupid question #983098403:
> 
> I can't seem to pass an unpacked sequence and keyword arguments to a
> function at the same time. What am I doing wrong?
> 
> def f(*args, **kw):
>     for a in args:
>         print 'arg:', a
>     for (k,v) in kw.iteritems():
>         print k, '=', v
> 
>>>> f(1,2)
> arg: 1
> arg: 2
> 
>>>> f(*[1,2])
> arg: 1
> arg: 2
> 
>>>> f(1,2, a=1)
> arg: 1
> arg: 2
> a = 1
> 
>>>> f(*[1,2], a=1)
>     File "<stdin>", line 1
>       f(*[1,2], a=1)
>                   ^
>     SyntaxError: invalid syntax 
> 
> Thanks,
> Rick
> 

I don't know if it's because there's some potential ambiguity (that I'm 
not seeing), but yeah, you just can't do that.  This should work though...

 >>> f(*[1, 2], **{'a':1})

noah


From rrr at ronadam.com  Fri Nov 10 15:57:04 2006
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 10 Nov 2006 14:57:04 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4554D416.70408@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>
	<4554D416.70408@hobbshouse.org>
Message-ID: <ej2pa2$vpq$1@sea.gmane.org>

Michael Hobbs wrote:
> Ron Adam wrote:
>> The faq also pointed out a technical reason for requiring the colon.  It makes 
>> the underlying parser much easier to write and maintain.  This shouldn't be 
>> taken to lightly in my opinion, because a simpler easer to maintain and more 
>> reliable python parser means development time can be spent improving the 
>> language in other areas instead of fixing parsing problems every time a new 
>> feature is added that might be used in a conditional expression.
>>   
> Not to be too picky about it, but the FAQ was referring to editor 
> parsers, not the parser used by Python itself. The Python parser could 
> easily change its grammar to make the colon optional.

Yes, hmm. I seem to remember (possibly falsely) of someone saying it did make 
pythons parser simpler. Oh well.  Making it easier for third party tools and 
parser to parse is still worth while in my opinion.

> I find the editor parsing excuse to be weak since most editors tend to 
> get hung up on Python code anyway, regardless of the colons. (Except for 
> the ones that are specifically written to support Python, or are 
> insanely programmable, like emacs.) In fact, I find that my editor 
> usually gets confused when it comes across colons in dictionary literals 
> or lambda expressions. If it just stuck to looking at the indentation, 
> instead of trying to play off syntax tricks, it would behave much better.

My editor (GVIM) has the most trouble with long triple quoted strings.  I could 
probably modify the script a bit and fix that though.  I've never run into 
problems with colons.

In another post on this thread you use an example of consistancy as a reason for 
not having the colon.  But maybe sometimes there can be too much consistency, 
like when you want to differentiate something because they have different 
contextual meaning.

    xxx xxx:
       yyy yyy
       yyy yyy

Here the colon indicates a difference or change in context.  A test vs a 
procedure, or a grouping vs attributes, etc.  I suppose you could also interpret 
it as meaning 'related to'.  In a way this is carried over to dictionaries where 
a key is related to it's value.  A range is related to the loop body,  a test is 
related to the if body, etc...

It is also an outline form that frequently used in written languages.  Something 
python tries to do, is to be readable as if it were written in plain language 
where it is practical to do so.  So the colon/outline form makes a certain sense 
in that case as well.

Cheers,
    Ron




















From spe.stani.be at gmail.com  Mon Nov  6 18:41:08 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 6 Nov 2006 15:41:08 -0800
Subject: SPE editor slow?
In-Reply-To: <454fb79c$1@quokka.wn.com.au>
References: <454e6f35@quokka.wn.com.au>
	<1162827834.032589.109470@b28g2000cwb.googlegroups.com>
	<454fb79c$1@quokka.wn.com.au>
Message-ID: <1162856468.914437.124260@b28g2000cwb.googlegroups.com>

timmy schreef:

> SPE - Stani's Python Editor wrote:
> > timmy schreef:
> >
> >
> >>hello i've been using the SPE editor on a moderately large project and
> >>it's constantly pausing during editing, like it's attempting to check
> >>something as i edit.
> >>as you can imagine a 4 second pause every few characters is EXTREMELY
> >>annoying when you just want to get some work done. i really like SPE's
> >>layout and features but if it's going to be dogshit slow all the time
> >>i'll have to change. please help!
> >
> >
> > SPE does error syntax checking which works fine for normal sized python
> > files. With these settings you can speed up SPE for larger projects:
> > 1. Edit>Preferences>Editor: Check realtime with "none" (default value:
> > compiler)
> > 2. Edit>Preferences>Editor: Update sidebar "when clicked"
> >
> > You can first try step 1, if you want SPE faster, use step 2 as well.
> >
> > Stani
> >
>
> thanks stani i actually had an incling that 2. was the real problem.
> i've got probably 200 or so clases in my project and it was pausing
> mainly when it came to names of things or a .
> i changed it to on clicked and it's fine now.
>
> it still does something else though that i'm at a loss to fix. when i
> open a file or run a script is throws up errors saying "Failed to
> display HTML document in ISO-8859-1 encoding"
>
> i guess thats a problem with those bottom info windows?

The bottom info window is indeed a wxhtml window. Please check if this
problem also occurs in the wxpython demo. If yes, report this on the
wxpython-user mailing list, otherwise report to my gmail address.

Stani

Stani



From paddy3118 at netscape.net  Mon Nov 13 09:10:55 2006
From: paddy3118 at netscape.net (Paddy)
Date: 13 Nov 2006 06:10:55 -0800
Subject: Python development time is faster.
In-Reply-To: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <1163427055.506643.126100@e3g2000cwe.googlegroups.com>


Chris Brat wrote:

> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
>
> Does anyone have any comments on that statement from personal
> experience?
> How is this comparison measured?
>
>
> Thanks
> Chris
Here's a start:
  http://www.tcl.tk/doc/scripting.html

Go Googling. There's a paper out their that compares error rates and
time to program, lines of code, for several languages and is often
cited in defence of scripting languages. (Scripting languages have
however moved on and now like to be called dynamic languages).

- Pad.



From vd12005 at yahoo.fr  Fri Nov  3 14:02:14 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 3 Nov 2006 11:02:14 -0800
Subject: Sorted and reversed on huge dict ?
Message-ID: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>

Hello,

i would like to sort(ed) and reverse(d) the result of many huge
dictionaries (a single dictionary will contain ~ 150000 entries). Keys
are words, values are count (integer).

i'm wondering if i can have a 10s of these in memory, or if i should
proceed one after the other.

but moreover i'm interested in saving theses as values, keys sorted and
reversed (ie most frequent first), i can do it with sort from unix
command but i wonder how i should do it with python to be memory
friendly.

can it be done by using :

from itertools import izip
pairs = izip(d.itervalues(), d.iterkeys())
for v, k in reversed(sorted(pairs)):
    print k, v

or will it be the same as building the whole list ?



From mohan.us2010 at gmail.com  Mon Nov  6 10:19:31 2006
From: mohan.us2010 at gmail.com (mohan)
Date: 6 Nov 2006 07:19:31 -0800
Subject: Learning Python
In-Reply-To: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
Message-ID: <1162826371.841769.283770@f16g2000cwb.googlegroups.com>


Hi Kaushal,

Other than "Core Python" by Chun, also try  "Python: How To Program" by
Dietel & Dietel. It is one of the good books for bigginers.

Good Luck,
Mohan.


On Nov 6, 10:00 am, "kaushal" <kaushalshri... at gmail.com> wrote:
> Hi
>
> How do i start Learning Python,is there any reference material which I
> can refer since I dont have
> any programming experience
> 
> Thanks and Regards
> 
> Kaushal



From martin.witte at gmail.com  Wed Nov  1 07:15:48 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 1 Nov 2006 04:15:48 -0800
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <1162383348.925961.231160@h48g2000cwc.googlegroups.com>


John Salerno wrote:
> What is the best way to check if a file already exists in the current
> directory? I saw os.path.isfile(), but I'm not sure if that does more
> than what I need.
>
> I just want to check if a file of a certain name exists before the user
> creates a new file of that name.
>
> Thanks.

You could try to read the file, if that fails it doesn't exist:

try:
    f = open('xxx')
except IOError:
    f = open('xxx', 'w')
    print "file doesn't exist"
print f



From billjosephson at hotmail.com  Thu Nov  9 10:23:41 2006
From: billjosephson at hotmail.com (BillJosephson)
Date: 9 Nov 2006 07:23:41 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163078175.600579.22930@h54g2000cwb.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
Message-ID: <1163085821.558812.321220@b28g2000cwb.googlegroups.com>


Ant wrote:
> > Vim, it can handle all the things.http://www.vim.org/
>
> I'm not convinced of that quite yet. jEdit's syntax highlighting seems
> more robust (see SocketServer.py in the standard library for an example
> - vim gets the highlighting of the first doc-comment wrong). I've also
> not found anything like jEdit's Console plugin for vim. It's
> interactive. You can run the current buffer in the console window. The
> console interacts with an error reporting pane which allows you to
> click on the error and it will take you to the appropriate line in the
> code that the stack trace indicates.
>
> The only thing I have found for vim (and it is specific to running
> Python code) is the runscript.vim plugin, which merely allows you to
> view the stdout from the script in a different buffer. It doesn't allow
> you to interact (say you are writing a console based interactive
> application for example)  nor does it have all of those other features
> I mentioned.
>
> I'm very interested in other people's vim setup for Python coding
> however, as I do use vim more than Python these days, mainly because I
> have to use it a great deal on headless servers (jEdit would be no good
> here of course) and I got fed up with adding artefacts such as
> extraneous i's, o's and :w's into my code when working with jEdit ;-)
> And it starts faster of course.


Ant: 


Great. Can you help me get it?

Thanks.



From johnjsal at NOSPAMgmail.com  Wed Nov  8 10:53:21 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 10:53:21 -0500
Subject: sqlite query not working
In-Reply-To: <pwd4h.4228$ig4.3654@newsread2.news.pas.earthlink.net>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>	<mailman.1854.1162933832.11739.python-list@python.org>	<4550f7a5$0$14445$c3e8da3@news.astraweb.com>
	<mailman.1855.1162934802.11739.python-list@python.org>
	<4550fa9f$0$17710$c3e8da3@news.astraweb.com>
	<pwd4h.4228$ig4.3654@newsread2.news.pas.earthlink.net>
Message-ID: <4551fd65$0$7047$c3e8da3@news.astraweb.com>

Dennis Lee Bieber wrote:

> 	The other thing to consider is that, if you were testing using a
> single cursor, and single session, the database would have shown you
> uncommitted changes. It wouldn't have been until you closed the
> cursor/connection without a commit that the DBMS would have tossed them
> -- a select would still retrieve your uncommited changes during that
> transaction.

Good point, and I wouldn't be surprised if I had done that too! Working 
with databases in Python (as opposed to direct command line queries) is 
fairly new to me, so who knows what crazy things I tried to do. :)


From spe.stani.be at gmail.com  Mon Nov  6 10:43:54 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 6 Nov 2006 07:43:54 -0800
Subject: SPE editor slow?
In-Reply-To: <454e6f35@quokka.wn.com.au>
References: <454e6f35@quokka.wn.com.au>
Message-ID: <1162827834.032589.109470@b28g2000cwb.googlegroups.com>

timmy schreef:

> hello i've been using the SPE editor on a moderately large project and
> it's constantly pausing during editing, like it's attempting to check
> something as i edit.
> as you can imagine a 4 second pause every few characters is EXTREMELY
> annoying when you just want to get some work done. i really like SPE's
> layout and features but if it's going to be dogshit slow all the time
> i'll have to change. please help!

SPE does error syntax checking which works fine for normal sized python
files. With these settings you can speed up SPE for larger projects:
1. Edit>Preferences>Editor: Check realtime with "none" (default value:
compiler)
2. Edit>Preferences>Editor: Update sidebar "when clicked"

You can first try step 1, if you want SPE faster, use step 2 as well.

Stani



From levub137 at wi.rr.com  Sun Nov 19 12:50:25 2006
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sun, 19 Nov 2006 17:50:25 GMT
Subject: [ANN] rpncalc-2.5  RPN Calculator for Python
Message-ID: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>

The rpncalc package adds an interactive Reverse Polish Notation (RPN)
interpreter to Python.  This interpreter allows the use of Python as
an RPN calculator.  You can easily switch between the RPN interpreter
and the standard Python interpreter.

Home page:  http://calcrpnpy.sourceforge.net/

Changes in 2.5

* Update the included clnum package.

* Added ratapx and unique_roots commands.


From pierre at saiph.com  Sun Nov 19 13:14:54 2006
From: pierre at saiph.com (Imbaud Pierre)
Date: Sun, 19 Nov 2006 19:14:54 +0100
Subject: tempfile.NamedTemporaryFile wont work
In-Reply-To: <ejppfj$bb4$01$1@news.t-online.com>
References: <456049ca$0$4692$426a74cc@news.free.fr>
	<pan.2006.11.19.13.49.28.701463@REMOVE.THIS.cybersource.com.au>
	<ejppfj$bb4$01$1@news.t-online.com>
Message-ID: <45609f0a$0$11670$426a74cc@news.free.fr>

Peter Otten a ?crit :
> Steven D'Aprano wrote:
> 
> 
>>On Sun, 19 Nov 2006 13:11:13 +0100, Imbaud Pierre wrote:
>>
>>
>>>On suse 9.3, tempfile.NamedTemporaryFile() doesnt work as expected.
>>
>>[snip]
>>
>>
>>>Symptom: the file does not always exist, after the call to
>>>NamedTemporaryFile(). Or at least its not seen by the strings command,
>>>or by os.path.exists.
>>>
>>>I guess the bug is pretty much os dependent, or even filesystem
>>>dependent (Im on reiserfs). Maybe the os is buggy, maybe, somehow, the
>>>python interface. Or did I miss something?
>>>Shame, I didnt even try to check for a python bug tracker.
>>
>>I can verify this problem occurs on Fedora Core 5 too:
>>
>>import os
>>import sys
>>import tempfile
>>import subprocess
>>def test(n):
>>chunk = ': +++ abcd +++'
>>for i in xrange(n):
>>tf = tempfile.NamedTemporaryFile()
>>tfName = tf.name
>>tf.seek(0)
>>tf.write(str(i) + chunk)
>>                tf.flush()
>>if not os.path.exists(tfName):
>>print 'pre-check: %s not there' % tfName
>>subprocess.Popen(['strings', tfName])
>>if not os.path.exists(tfName):
>>print 'post-check: %s not there' % tfName
>>
>>
>>And here is a typical run, with the boring bits removed for ease of
>>reading:
>>
>>
>>>>>test(30)
>>
>>0: +++ abcd +++
>>1: +++ abcd +++
>>    [ more of the same ]
>>14: +++ abcd +++
>>strings: '/tmp/tmpOALbx9': No such file
>>16: +++ abcd +++
>>17: +++ abcd +++
>>18: +++ abcd +++
>>    [ more of the same ]
>>27: +++ abcd +++
>>strings: /tmp/tmpdc52Nz: No such file or directory
>>29: +++ abcd +++
>>
>>
>>Curiouser and curiouser... not only does os.path.exist always report the
>>temp file as existing (at least in my tests), even when strings can't find
>>it, but strings returns different error messages.
>>
>>Is it possible this is a bug in strings?
> 
> 
> What /you/ are seeing is not a bug, I think. Popen() is asynchronous,
> therefore you may enter the second iteration -- which implicitly closes the
> temporary file -- before strings actually tries to access it. Use call()
> and everything should be fine.
Thanks A LOT, works fine, I feel kind of silly; your diagnostic is
pretty obvious, afterward... I felt uneasy not closing the Popen, but
it worked, so why bother? Its so easy to make ugly code!



From frank at chagford.com  Sat Nov 11 03:25:46 2006
From: frank at chagford.com (Frank Millman)
Date: 11 Nov 2006 00:25:46 -0800
Subject: Inheritance Question
In-Reply-To: <mailman.2087.1163231227.11739.python-list@python.org>
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
	<1163226712.585220.53550@f16g2000cwb.googlegroups.com>
	<mailman.2087.1163231227.11739.python-list@python.org>
Message-ID: <1163233546.838226.187290@m73g2000cwd.googlegroups.com>


Gabriel Genellina wrote:
> At Saturday 11/11/2006 03:31, Frank Millman wrote:
>
> >Continuing your analogy of animals, assume a class A with a 'walk'
> >method and an 'eat' method.
> >
> >Most animals walk the same way, but a few don't, so I create a subclass
> >AW and override the walk method.
> >
> >Most animals eat the same way, but a few don't, so I create a subclass
> >AE and override the eat method.
> >
> >How do I create an instance of an animal that both walks and eats
> >differently?
> >

[snip]

> Answer 1) Move *both* ways of walk, and *both* ways of eating, to
> another base class. Best when this is pure behavior - no new
> attributes are involved.
>

[snip details]

>
> Answer 2) Use an instance of another class to define how to walk and
> how to eat. Advantage: it can later be modified at runtime (strategy pattern).
>

[snip details]

Many thanks for this, Gabriel.

I have seen explanations like this before, but my eyes usually glaze
over before I have finished, and I end up more confused than when I
started.

With a combination of my subconscious slowly getting an understanding
of this, and your clear explanation, I think I have finally got it.

Obviously my real world situation is quite a bit more complex than this
simple example, but with the help you have given me I can now
experiment with different ideas and decide on the best strategy.

Thanks again

Frank



From seymour.morris at gmail.com  Sat Nov 18 20:57:29 2006
From: seymour.morris at gmail.com (Seymour)
Date: 18 Nov 2006 17:57:29 -0800
Subject: Reloading after from adder import *   ????
Message-ID: <1163901449.418534.251060@b28g2000cwb.googlegroups.com>

I created a module with the DictAdder subclass as follows:

class DictAdder(Adder):
    def add(self, x, y):
        new={}
        for k in x.keys(): new[k]=x[k]
        for k in y.keys(): new[k]=y[k]
        return new

At the interactive prompt I then said: from Adder import *

After defining an instance of DictAdder as x=DictAdder() and trying to
add two dictionaries, I notice a typo in DictAdder.  If I then go back
and make a change to the DictAdder subclass I have to go through many
steps to add two dictionaries (get the revision into active memory):
1. import Adder
2. Reload(Adder)
3. from Adder import *
4. x=DictAdder()

Question: Is there an easier and quicker way to get DictAdder into
active memory?????


Thanks,
Seymour



From antroy at gmail.com  Wed Nov  8 12:30:18 2006
From: antroy at gmail.com (Ant)
Date: 8 Nov 2006 09:30:18 -0800
Subject: Exception Handling in TCPServer (was;
	Problem exiting application in Windows Console.)
In-Reply-To: <1163001245.707034.310900@f16g2000cwb.googlegroups.com>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
	<1163001245.707034.310900@f16g2000cwb.googlegroups.com>
Message-ID: <1163007018.221972.93580@b28g2000cwb.googlegroups.com>


Ant wrote:
...
> OK, I've narrowed the problem back to the way HTTPServer (actually its
> TCPServer parent) handles exceptions thrown by the process_request
> method by catching them all, and then calling a handle_error method.
> There doesn't seem to be a way of getting at the exception thrown
> however - does anyone know how I can get this information?

Hmm. Lonely topic ;-)

I've found a way to solve the problem, by creating a subclass of
HTTPServer which overrides the handle_error method:

class HelpServer(HTTPServer):
    def handle_error(self, request, client_address):
        exception_line = inspect.trace()[-1][-2][0]
        if "sys.exit" in exception_line:
            print "Trying to exit again!"
            sys.exit(0)
        else:
            HTTPServer.handle_error(self, request, client_address)

This seems a really nasty hack though - any ideas for a cleaner way to
do it?



From aisaac at american.edu  Fri Nov 10 12:11:24 2006
From: aisaac at american.edu (Alan G Isaac)
Date: Fri, 10 Nov 2006 17:11:24 GMT
Subject: handling many default values
Message-ID: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>

My class MyClass reuses many default parameters
with a small number of changes in each instance.
For various reasons I decided to put all the
parameters in a separate Params class, instances
of which reset the default values based on keyword
arguments, like this:

class Params:
     def __init__(self,**kwargs):
         #set lots of default values
         ...
         #set the deviations from defaults
         self.__dict__.update(kwargs)

Is this a reasonable approach overall?
(Including the last line.)

Thanks,
Alan Isaac


From robert.kern at gmail.com  Thu Nov 16 16:36:01 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 16 Nov 2006 15:36:01 -0600
Subject: accessing fortran modules from python
In-Reply-To: <1163696370.036741.274000@b28g2000cwb.googlegroups.com>
References: <1163696370.036741.274000@b28g2000cwb.googlegroups.com>
Message-ID: <ejilke$14e$1@sea.gmane.org>

sam wrote:
> hello all,
> 
> i am currently in the process of planning a piece of software to model
> polymerisation kinetics, and intend to use python for all the
> high-level stuff. the number-crunching is something i would prefer to
> do in fortran (which i have never used, but will learn), but i have no
> experience of accessing non-python code from python. i am also fairly
> new to programming period, and am therefore tackling a fairly serious
> issue reletive to my experience.
> 
> how easy is it to get fortran modules running from python? if c is
> easier to use in this respect, i could go in that direction instead.
> 
> i realize there is a lot of material on this subject already available,
> but i am finding it difficult to make sense of, it's like trying to
> take a drink from a fire hose.
> 
> any advice would be gratefully received. i will almost certainly be
> coding this on windows, for what it's worth.
> 
> thank you,
> 
> sam
> 
> PS if numpy is adequate for this, i would be quite happy to use it. i
> got the impression it was more for matrix algebra. i will be
> programming a monte carlo simulation, which will need to perform a lot
> (a lot!) of simple operations over and over...

numpy isn't for matrix algebra, specifically. It is primarily designed for
operations on arrays. If your simple operations can be "vectorized," then numpy
will benefit you. If you can describe your needs in more detail, we'll be happy
to give you suggestions on the numpy-discussion list.

  http://www.scipy.org/Mailing_Lists

Of course, since the major player in wrapping Fortran libraries for Python is
f2py, a component of numpy, you're probably going to end up installing numpy
anyways.

  http://numpy.scipy.org

All of the f2py documentation is currently in the source, so start here:

  http://projects.scipy.org/scipy/numpy/browser/trunk/numpy/f2py/docs/README.txt

Using f2py to wrap Fortran subroutines is actually a fair bit simpler than
wrapping C code, mostly because typical Fortran uses a limited set of simple types.

-- 
Robert Kern

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



From bj_666 at gmx.net  Fri Nov 10 12:14:02 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 10 Nov 2006 18:14:02 +0100
Subject: newbee I have an object how to check what's his class?
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
	<1163171613.040825.78290@m73g2000cwd.googlegroups.com>
	<ej2b34$9nk$1@ultra60.mat.uni.torun.pl>
Message-ID: <pan.2006.11.10.17.13.58.663930@gmx.net>

In <ej2b34$9nk$1 at ultra60.mat.uni.torun.pl>, consternation wrote:

> Thank You for reply but ....
> I found solution suggested by You in a tutorial yesterday. For some reason
> it doesn't work in my case.
> 
> code:
> #mem-dictionary in Y class for storing objects
> #Y doesn't inherit from X
>       for (i,v) in self.mem.items(): 
>       print " isinstance(x,X)"
>       print  isinstance(v,X)
>       print "type(x) is X"
>       print type(v) is X
>       print v.__class__.__name__
>       print v.__class__
> 
> result:
> isinstance(x,X)
> False
> type(x) is X
> False
> <type 'list'>
> list

Define "doesn't work".  Obviously lists are not instances of your `X`
class.  So where's the problem?  What did you expect and why?

Ciao,
	Marc 'BlackJack' Rintsch


From Eric_Dexter at msn.com  Wed Nov  1 20:37:57 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 1 Nov 2006 17:37:57 -0800
Subject: trying to call main function with execfile with two arguments
Message-ID: <1162431477.292694.201900@h54g2000cwb.googlegroups.com>

I was trying to find out what my value for filename is but it will not
print.  The file I am calling csoundgrid2.main seems to work fine when
I call it directly from spe with two values and I have used this file
dialog to load other files the error I am getting is.  thanks for any
help in advance

 File "C:\Python24\Lib\site-packages\boa-constructor\test of
snake\csoundgrid2.py", line 35, in loadFile
infile = open(sys.argv[1], 'r') #The first argument passed in is the
file name
IndexError: list index out of range

def sco_editor(self):
         "Pick a sco file and load it into a sco editor"
         dlg = wx.FileDialog(self,"load sco file", ".", "", "*.sco",
wx.OPEN)
         try:
             if dlg.ShowModal() == wx.ID_OK:
                 filename = dlg.GetPath()
                 # Your code
                 print filename
                 csoundgrid2.main(filename, """;<sco_header>""")
                 #("csoundgrid2.py", filename ,""";<sco_header>""",
shell=True)
                 #os.startfile('csoundgrid2.py', filename,
""";<sco_header>""")
         finally:
            dlg.Destroy()

https://sourceforge.net/project/showfiles.php?group_id=156455
http://www.dexrow.com



From john106henry at hotmail.com  Thu Nov 16 16:46:13 2006
From: john106henry at hotmail.com (John Henry)
Date: 16 Nov 2006 13:46:13 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163711343.870829.110030@h48g2000cwc.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <1163713573.147702.229320@k70g2000cwa.googlegroups.com>

Bill Gates will have you jailed! :-)

On a more serious note, is there any alternative to Simulink though?

sturlamolden wrote:
>and is infinitely
> more expensive.
>
> Does anyone wonder why I am not paying for Matlab maintenance anymore?
>
> Sorry Mathworks, I have used your product for years, but you cannot
> compete with NumPy.
> 
> 
> Cheers,
> Sturla Molden



From nospam at domain.tld  Thu Nov  9 00:37:59 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 09 Nov 2006 06:37:59 +0100
Subject: Cactching Stdout
References: <1162976981.747479.226680@m7g2000cwm.googlegroups.com>
	<bAv4h.4066$L6.3834@newsread3.news.pas.earthlink.net>
Message-ID: <eiuern$t1k$1@kohl.informatik.uni-bremen.de>

Dennis Lee Bieber wrote:

>> popen...is this what I need? How can I use them? It is very important
>> for me that I could take the output in real-time.
>> Thanks for the help!
>> Massi
> 
> That's going to be difficult... popen and pipes work when one
> process starts another INDEPENDENT process.

I'm not sure, if it fits the problem, but just a few days ago I had the
problem to catch the stdout and stderr of a module to process it before
writing it to the console. What I did was basically this:

---
import sys
import StringIO

# save the original streams
_stdout_ = sys.stdout
_stderr_ = sys.stderr

# create StringIO string buffers to replace streams
sys.stdout = StringIO.StringIO()
sys.stderr = StringIO.StringIO()

# Now print something, this goes to the string buffers instead of console
print "Hello World to stdout"
sys.stderr.write("Hello World to stderr\n")

# Now process the contents of the buffers...
...
# ...and print them to the real console afterwards
_stdout_.write(sys.stdout)
_stderr_.write(sys.stderr)

# Clean up the string buffers for the next IO
sys.stdout.truncate(0)
sys.stderr.truncate(0)
---

Of course you should put all that into defs and create own write/print
functions to encapsulate the whole buffering/processing/cleanup.

This works great for scripting, but I'm pretty sure, that it does not work
for C Libraries in Python. But I do not know, how Python handles its
streams internally, so it might be worth a try.

Regards
Stephan


From no-spam at no-spam-no-spam.invalid  Fri Nov  3 09:11:30 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 15:11:30 +0100
Subject: Keyboard interrupts, Idle vs. SciTE
In-Reply-To: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
References: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
Message-ID: <eifiml$ogp$1@news.albasani.net>

John Ladasky wrote:
> Hi there.
> 
> The following minimal code in Python 2.3.4 works under Idle v. 1.0.3,
> but not under SciTE v. 1.66:
> 
> from time import sleep
> try:
>     while True:
>         sleep(0.25)
>         print ".",
> except KeyboardInterrupt:
>     print "\nKeyboard interrupt received.  Exiting program.\n\n"
> 
> 
> Under SciTE, I do not get my "exiting program" message.  Instead, I get
> the standard SciTE abort message:
> 
> 
>> Process failed to respond; forcing abrupt termination...
>> Exit code: 1
> 
> 
> I much prefer the SciTE environment to Idle.  Is there any way that I
> can rewrite my program to restore the keyboard interrupt function under
> SciTE?  Alternately, is there some setting that I can change in SciTE
> to accomplish the same effect?

Use PythonWin on Windows. It is based on the same Scintilla editor, but provides real interaction and inline script execution capabs, debugging ...
SciTE catches only stdout ( sometimes :-) ) etc. 

robert


From apardon at forel.vub.ac.be  Fri Nov 10 14:07:04 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 10 Nov 2006 19:07:04 GMT
Subject: range syntax
References: <mailman.2036.1163170257.11739.python-list@python.org>
	<ej2969$uee$1@cernne03.cern.ch>
Message-ID: <slrnel9jeo.93u.apardon@rcpc42.vub.ac.be>

On 2006-11-10, Roberto Bonvallet <Roberto.Bonvallet at cern.ch> wrote:
> Colin J. Williams wrote:
>> One of the little irritants of Python is that the range syntax is rather 
>> long-winded:
>> [Dbg]>>> range(3, 20, 6)
>> [3, 9, 15]
>> [Dbg]>>>
>> It would be nice if one could have something like 3:20:6.
>
> In that case, how would the parser know which colon terminates the
> 'for' in the following example:
>
>     for i in 2:3:4:
> 	...

By the programmer using parenthesis. Like

  for i in (2:3):
     ...


Just as you are supposed to use parthesis if you
want a tuple as a function argument although normally
a comma is enough to form a tuple.

-- 
Antoon Pardon


From john106henry at hotmail.com  Fri Nov 10 01:48:10 2006
From: john106henry at hotmail.com (John Henry)
Date: 9 Nov 2006 22:48:10 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163139352.206221.213180@m73g2000cwd.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
	<1163139352.206221.213180@m73g2000cwd.googlegroups.com>
Message-ID: <1163141290.868726.11330@h48g2000cwc.googlegroups.com>

Upon closer look, the walkthrough did say:

***************************
from PythonCard import model

Change that so it says:

from PythonCard import dialog, model

Save the code.
***************************

So, it works.



John Henry wrote:
> Bill Maxwell wrote:
> > On 8 Nov 2006 11:49:07 -0800, "John Henry" <john106henry at hotmail.com>
> > wrote:
> >
> > >
> > >John Salerno wrote:
> > >> Dan Lenski wrote:
> > >>
> > >> > So, is there another toolkit I should be looking at?
> > >>
> > >> I highly recommend wxPython. It's very mature, full-featured, and
> > >> portable, and fairly easy to learn as well. I can't really compare it to
> > >> other toolkits (not having used any of them, except Tkinter), but it's
> > >> definitely one of the most popular and well-supported ones out there.
> > >>
> > >> http://www.wxpython.org/
> > >
> > >I highly recommend that you try PythonCard (which sits on top of
> > >wxPython).  You can get productive very very quickly.  Take a look at:
> > >
> > >http://pythoncard.sourceforge.net/walkthrough1.html
> >
> >
> > I took a brief look at PythonCard almost a year ago and got discouraged
> > by what I found, so I stopped looking at it.  I've inserted my notes
> > from back then, below.  Does anybody know if these things have been
> > fixed in the latest release?
> >
> > Bill
> >
> >
> > =====================================================================
> > My notes from Fri Dec-23-2005:
> >
> > This is a list of gripes I have while trying to learn about PythonCard.
> > I'm trying to investigate various GUI builders for Python, and
> > PythonCard looks promising, but a lot of things are getting in the way.
> >
> > I installed yesterday, using this installer:
> > PythonCard-0.8.1.FIXED.win32.exe
> >
> > A)  The very first example in the tutorial is wrong!
> >
> > 	On this page:  http://pythoncard.sourceforge.net/documentation.html
> > 	When you follow this link to try something for the very first time:
> >
> > 		Getting Started in PythonCard by Dan Shafer:
> > 			http://pythoncard.sourceforge.net/walkthrough1.html
> >
> > 	You quickly see that the minimal.py example doesn't even contain
> > this line, even though the tutorial refers to it:
> >
>
> I am not sure which one you are referring to but in the
> PythonCard\samples\minimal, you will find a minimal.py that says:
>
> #!/usr/bin/python
>
> """
> __version__ = "$Revision: 1.8 $"
> __date__ = "$Date: 2005/12/17 15:20:02 $"
> """
>
> from PythonCard import model
>
>
> class Minimal(model.Background):
>     def on_menuFileAbout_select(self, event):
>         pass
>
> if __name__ == '__main__':
>     app = model.Application(Minimal)
>     app.MainLoop()
>
>
>
> > 		def on_menuFileAbout_select(self, event):
> >
> > 	And, of course, if you replace the word "pass" with this, as
> > instructed:
> >
> > 		result = dialog.alertDialog(self, 'It works!', 'Showing Off')
> >
> > 	it won't run, because the existing "pass" line isn't inside a def
> > inside of a class.
> >
>
> No, it didn't work because the author forgot to mention that you have
> to do a:
>
> from PythonCard import model, dialog
>
> instead of just:
>
> from PythonCard import model
>
> I just tried it and it works.
>
> >
> > B)  Is the Notebook widget really supported?
> >
> > 	In the installed file "changelog.txt" (gets installed as part of
> > PythonCard installation), it says:
> >
> > 		"added Notebook component, PageBackground, and testNotebook
> >  		sample"
> >
> > 	But, the testNotebook sample is nowhere to be found.
> >
>
> I haven't come across a need to use Notebook and so I can not say for
> sure.  Looking at notebook.py, it appears to be just a simple wrapper
> on top of the wxWindow notebook.  I would encourage you to post a
> message to the mailing list and ask there.
>
>
> > 	I looked lots of places, including the main SourceForge web site,
> > and on the wiki, here:
> >
> > 		http://wiki.wxpython.org/index.cgi/PythonCard
> >
> > 	Both the main website and the wiki seem way out of date, and the
> > latest dates I could find on both of them are sometime in 2004.
> >
>
> Yes, sometime around 2004, the website updating stopped.   Fortunately,
> development didn't.  There are quite a number of new things since then:
> new resource editor (now call layout Editor, standalone exe creator,
> and so forth).  I even learn that a new sizer handler is in the work.
>
> Not saying that there are 10 programmers working 7/24 on it.  It *is*
> an Open Source project nevertheless.   Nobody gets paid for doing it.
>  But there are development work going on.
>
>
> > 	Finally, by following the mailing list archive link on the main
> > website, I managed to find a reference to the notebook component on the
> > ASPN site, where some guy named Brian wonders about the same thing as
> > me, concerning the availability of the notebook component:
> >
> > 		http://aspn.activestate.com/ASPN/Mail/Message/pythoncard/2536825
> >
> > 	and, that message led me here:
> >
> > 		http://article.gmane.org/gmane.comp.python.pythoncard/1060
> >
> > 	where Kevin Altis admits that he forgot to include it in the 0.8.1
> > release!  At least he provides a way to download it separately.  But,
> > gheesh, this is pretty poor for a new user.  I was interested in using
> > the notebook component right away, because I looked at the wxGlade
> > tutorial before looking at PythonPage, and they use the notebook
> > component in their example (and I decided I really want to use the
> > component).
> >
> > 	To add insult to injury, after you download the zip file with the
> > testNotebook stuff, the readme file says this:
> >
> > 		"Until we have a Notebook integrated into some of the other
> > samples or tools this will serve as a basic test app, but I don't expect
> > to include it in releases."
> >
>
>
> As with all Open Source projects, your mileage differs.   PythonCard
> does what *I* need to get done - and allowed me to get it done in a
> *hurry*.  May be you really need Notebook and may be it's true that
> Notebook really doesn't work, I don't know.   But if you managed to get
> it working, write it up and get it included.  That's what Open Source
> Projects are all about.
>
>
> > C)  Are the websites being maintained?
>
>
> It appears that the maintainer of the web site stopped updating it
> since late 2004.  I don't know why.   May be he's been busy.  May be he
> got mad.  I don't know.   All I know is that I have been very
> productive with what I need to get done (and earned a happy living with
> the code I created) and I am very grateful to the people that worked on
> it - past and present.
>
> I am not a "professional programmer" and so I probably can't contribute
> to the development effort itself.   However, I've gotten pretty good in
> using most of the package (other then Notebook, I admit).  So, if you
> have any specific questions, please post it to the PythonCard list and
> I'll try to help if I can.
> 
> Cheers.



From steve at holdenweb.com  Thu Nov  2 21:36:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Nov 2006 02:36:08 +0000
Subject: is mod_python borked?
In-Reply-To: <1162509979.221261.192440@m7g2000cwm.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
	<1162509979.221261.192440@m7g2000cwm.googlegroups.com>
Message-ID: <454AAB18.1@holdenweb.com>

grahamd at dscpl.com.au wrote:
> walterbyrd wrote:
> 
>>I am considering python, instead of php, for web-application
>>development. I often see mod_python.criticisized as being borked,
>>broken, or just plain sucking.
>>
>>Any truth to any of that?
> 
> 
> I replied to you over on the mod_python mailing list when you reposted
> the question there, but I'll copy to here my response for the benefit
> of others.
> 
> In answer to your question of whether mod_python is borked, the answer
> is yes and no.
> 
Nice summary. To be fair to Walter, it was me who reposted his question. 
But I think it's great that the whole of c.l.py is now up to speed on 
mod_python, so thanks!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From robert.kern at gmail.com  Thu Nov  2 16:44:44 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 02 Nov 2006 13:44:44 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162502997.175322.171730@e3g2000cwe.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<mailman.1677.1162490601.11739.python-list@python.org>	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>	<eideec$tk8$1@sea.gmane.org>
	<eidlpc$qfi$1@sea.gmane.org>	<mailman.1690.1162501294.11739.python-list@python.org>
	<1162502997.175322.171730@e3g2000cwe.googlegroups.com>
Message-ID: <eidosb$7dd$1@sea.gmane.org>

John Coleman wrote:
> Maybe I don't know what I'm looking for, but I downloaded Enthought a
> few days ago and don't seem to find MinGW on my system. There are 2
> relatively small (totalling about 13 kb IIRC) *python* files deeply
> buried in the distribution with mingw in their filename but nothing
> like a gcc compiler. I've mostly used visual studio or code warrior for
> C compiling, so again - maybe I don't know what I am looking for.

It is in c:\Python24\Enthought\mingw32\, IIRC (I don't have it in front of me). 
Add c:\Python24\Enthought\mingw32\bin\ to your PATH environment variable, and 
gcc.exe should be executable.

-- 
Robert Kern

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



From walterbyrd at iname.com  Sat Nov 18 11:44:54 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 18 Nov 2006 08:44:54 -0800
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163810800.915170.48580@e3g2000cwe.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
	<1163810800.915170.48580@e3g2000cwe.googlegroups.com>
Message-ID: <1163868294.131526.308080@e3g2000cwe.googlegroups.com>


sandra.eloff at gmail.com wrote:

>
> Python is much better suited to writing and mainting large web
> applications though.
>

I have to ask: why is that? Because Python is more readable? Because
Python runs faster? Is Python more stable for large scale applications?
Does this apply when using Python with CGI, FastCGI, mod_python, or
what?



From rookswood at suburbian.com.au  Sat Nov  4 22:03:44 2006
From: rookswood at suburbian.com.au (John Savage)
Date: Sun, 05 Nov 2006 03:03:44 GMT
Subject: To remove some lines from a file
References: <1161782402.343992.152080@k70g2000cwa.googlegroups.com>
	<ehnsht$ic1$1@news.lrz-muenchen.de>
	<mailman.1186.1161793835.11739.python-list@python.org>
	<ehpkqk$hs8$1@news.lrz-muenchen.de> <umz7j4jdu.fsf@sbcglobal.net>
	<ehptv2$n5r$1@news.lrz-muenchen.de>
Message-ID: <061105000015310.05Nov06$rookswood@suburbian.com>

Sebastian Busch <sebastian_busch at gmx.net> writes:
>The task is:
>
>"Remove the first two lines that don't begin with "@" from a file."
>
>How would you do it with sed?

Why a sed solution in a python group?

sed '/^@/!{G;/\n\n\n/{P;d;};s/[^\n]*//;h;d;}' data
-- 
John Savage                   (my news address is not valid for email)


From bugs at almad.net  Sat Nov  4 09:40:36 2006
From: bugs at almad.net (Almad)
Date: 4 Nov 2006 06:40:36 -0800
Subject: Python crushing on kinterbasdb connect @ FreeBSD
Message-ID: <1162651236.607722.23800@i42g2000cwa.googlegroups.com>

Hi,

I uploaded my application on our production server running FreeBSD and
I found it crashing at startup.

Problem is in connecting to my Firebird database:
kinterbasdb.connect(with either good or wrong arguments) is resolving
in:

python in free(): error: junk pointer, too high to make sense
Abort trap (core dumped)

I installed kinterbasdb manually while I need 3.2 version for DBClass
and latest in ports is 3.1; could this be the problem? (rest of system
is from ports)

Thank You for any advice,

Almad



From gagsl-py at yahoo.com.ar  Wed Nov 15 12:51:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 14:51:58 -0300
Subject: modules and generated code
In-Reply-To: <455B4F66.9000408@wiggly.org>
References: <mailman.146.1163514956.32031.python-list@python.org>
	<ejckue$ns2$01$1@news.t-online.com>
	<mailman.150.1163517249.32031.python-list@python.org>
	<ejcq59$920$00$1@news.t-online.com>
	<mailman.163.1163526017.32031.python-list@python.org>
	<ejfhqf$189$1@aioe.server.aioe.org> <455B4F66.9000408@wiggly.org>
Message-ID: <7.0.1.0.0.20061115145032.038b61e0@yahoo.com.ar>

At Wednesday 15/11/2006 14:33, Nigel Rantor wrote:

>I have an IDL file that is used to generate a set of stub and skeleton
>code that is not human-modifiable.
>
>Eventually I would like to have my IDL in source control and have a
>setup script able to generate my stubs and skels and install them for me.
>
>At the same time I want to produce code that uses this code but in the
>same package.
>
>[...]
>Basically, I want the same top-level package to have bits of code in
>different directories, but because Python requires the __init__.py file
>it only picks up the first one in PYTHONPATH.

Put both directories in the same package. But this is the obvious 
thing, so maybe I'm missing something.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From john106henry at hotmail.com  Sun Nov 19 20:22:34 2006
From: john106henry at hotmail.com (John Henry)
Date: 19 Nov 2006 17:22:34 -0800
Subject: Looking for a graph (as in network, nodes) package
Message-ID: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>

I am looking for a ready made simple graph package.  I found an
extensive one in the piana package but when  I try to use just the
graph portion, it fails to load because of the line:

class Graph(object):
 ...

It seems that their Graph is subclassed from "object" but I couldn't
find a "object" class anywhere.  So, I abandoned using that one.

Before I reinvent the wheel and start writing one myself, can somebody
point me to a ready made one?  I am afraid Googling "Python Graph"
wouldn't be much help (millions and trillions of hits).

Thanks,



From titogarcia_nospamplease_ at gmail.com  Sun Nov  5 10:46:13 2006
From: titogarcia_nospamplease_ at gmail.com (=?ISO-8859-1?Q?Ernesto_Garc=EDa_Garc=EDa?=)
Date: Sun, 05 Nov 2006 16:46:13 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <mailman.1781.1162733232.11739.python-list@python.org>
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1781.1162733232.11739.python-list@python.org>
Message-ID: <eil109$e32$1@hefestos.uned.es>

Tim Peters wrote:

> More idiomatic as
> 
>    if len(list) > 0:
> 
> and even more so as plain
> 
>    if list:
> 
>>    print list[0],
>>    for element in list[1:]:
>>      print ',', element,
> 
> 
> Do you really want a space before and after each inter-element comma?

No, but it was only an example. I usually go for string concatenation.

> An often-overlooked alternative to playing with ",".join() is:
> 
>    print str(list)[1:-1]

That's funny! Not that I like it more that the join solution, but funny 
nevertheless.

Thank you,
Ernesto


From ptmcg at austin.rr._bogus_.com  Sat Nov 18 06:29:01 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 18 Nov 2006 11:29:01 GMT
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
Message-ID: <18C7h.72$_H5.25@tornado.texas.rr.com>

<nateastle at gmail.com> wrote in message 
news:1163829271.660193.70450 at j44g2000cwa.googlegroups.com...
>I have a simple assignment for school but am unsure where to go. The
> assignment is to read in a text file, split out the words and say which
> line each word appears in alphabetical order. I have the basic outline
> of the program done which is:
>

And in general, this is one of the best "can anyone help me with my 
homework?" posts I've ever seen.
A. You told us up front that it was your homework.
B. You made an honest stab at the solution before posting, and posted the 
actual code.
C. You ended with some specific questions on things that didn't work or that 
you wanted to improve.

Your current program looks like at least A- material.  Add use of sorted and 
enumerate, and handle that exception a little better, and you're getting 
into A+ territory.

Out of curiosity, what school are you attending that is teaching Python, and 
under what course of study?

-- Paul




From steve at holdenweb.com  Mon Nov  6 14:43:47 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Nov 2006 14:43:47 -0500
Subject: getchar [was: Re: Python-list Digest, Vol 38, Issue 72]
In-Reply-To: <caa940d20611060458j7c5ae681l83a33c465810b165@mail.gmail.com>
References: <mailman.4743.1162810804.11738.python-list@python.org>
	<caa940d20611060458j7c5ae681l83a33c465810b165@mail.gmail.com>
Message-ID: <454F9073.8050803@holdenweb.com>

Santosh Chikkerur wrote:
> Hi Friends,
> 
> How to use getchar( ) in python. I want to see the output of the program 
> ,step by step.
> I have given print statements in between for the results..
> Hence i would like to print the output everytime there is 
> getchar().which is the
> similar fn in python
> 
[... several hundred lines of irrelevant digest omitted ...]
In future please don't quote the whole of a digest just to ask a simple 
question! Instead send an email to python-list at python.org. Also, it 
helps if you can give a subject line that indicates what you are asking 
about.

Python has getch() in Windows only, there is no getchar(). If you want 
your program to be portable to Linux/Unix as well then getch() won't do. 
I have seen a portable recipe, but my google-fu is low today so I'll 
have to let someone else point that out if you need it.

However, if the Enter key will do then just try inserting

raw_input("Hit Enter to continue: ")

That'll work on any platform.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From larry.bates at websafe.com  Mon Nov 20 12:54:54 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 20 Nov 2006 11:54:54 -0600
Subject: How to make a python file to a DLL or COM object?
In-Reply-To: <1163989866.823548.87430@m73g2000cwd.googlegroups.com>
References: <1163989866.823548.87430@m73g2000cwd.googlegroups.com>
Message-ID: <4561EBEE.9060805@websafe.com>

many_years_after wrote:
> Hi:
> 
>   some one said we can make a python file to an COM object through
> py2exe , but I  haven't got the method. Could any one who knows tell me
> how to do?
> 
> Thanks
> 

You may want to take a look here.  See COM servers section.

http://www.py2exe.org/old/

COM servers
COM servers are built by passing a com_server keyword argument to the setup
function, again the value must be a list of Python module names containing one
or more COM server classes (identified by their _reg_progid_ attribute):

# setup.py
from distutils.core import setup
import py2exe

setup(com_server=["win32com.server.interp"])

-Larry


From rowen at cesmail.net  Fri Nov  3 14:52:52 2006
From: rowen at cesmail.net (Russell E. Owen)
Date: Fri, 03 Nov 2006 11:52:52 -0800
Subject: setting up wxPython on a Mac
References: <mailman.1719.1162571053.11739.python-list@python.org>
	<454B6DB4.4040107@kevin-walzer.com>
	<mailman.1724.1162574966.11739.python-list@python.org>
	<454B8837.9060103@kevin-walzer.com>
Message-ID: <rowen-62C3D5.11525203112006@gnus01.u.washington.edu>

In article <454B8837.9060103 at kevin-walzer.com>,
 Kevin Walzer <kw at kevin-walzer.com> wrote:

>Brian Blais wrote:
>I'm not sure about numpy/scipy/matplotlib. I don't think there are
>pre-built packages for them; you may have to build them from source. You
>could also post to the MacPython mailing list, someone there has
>probably looked at this already.

There are prebuilt extension for these for Python 2.4.x available from 
<http://pythonmac.org/packages/>. Packages for 2.5 will show up 
eventually, but meanwhile if you want prebuilt then use python 2.4.4.

For python itself, I recommend using the Mac installer available from 
the standard python web site (rather than the package available from 
<http://pythonmac.org/packages/>).

-- Russell


From fredrik at pythonware.com  Sat Nov 11 11:16:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 17:16:33 +0100
Subject: newbie: minidom
In-Reply-To: <4555F394.80802@redlinepy.com>
References: <if25h.664$mZ5.553@tornado.fastwebnet.it>	<mailman.2053.1163184761.11739.python-list@python.org>
	<4555F394.80802@redlinepy.com>
Message-ID: <ej4t0v$ado$1@sea.gmane.org>

Paul Watson wrote:

>> why?  the documents are equivalent, and any XML application that 
>> requires an explicit UTF-8 encoding declaration is broken.
> 
> Explicit is better than implicit.

inventing your own XML standard is no way better than using the existing 
one.

</F>



From fredrik at pythonware.com  Thu Nov 30 02:01:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 30 Nov 2006 08:01:48 +0100
Subject: Python Question About Compiling.
In-Reply-To: <5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.com>
References: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
	<5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.com>
Message-ID: <eklvks$7a6$1@sea.gmane.org>

Scheol Service wrote:

> Im just unsure on how to compile python code into .exe executionable
> files.  Is there a simple way to do this?

typing "compile python code" into google gives you

     http://effbot.org/zone/python-compile.htm

which gives you some background, and links to a bunch of bundling tools.

</F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Nov 27 13:11:56 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 27 Nov 2006 19:11:56 +0100
Subject: Calling a thread asynchronously with a callback
References: <mailman.774.1164649819.32031.python-list@python.org>
Message-ID: <4t0o3cF11o4u1U1@mid.individual.net>

Edwin Gomez wrote:

> I'm a C# developer and I'm new to Python.  I would like to know if
> the concept of Asynchronous call-backs exists in Python.

Sure. Either with this:

http://twistedmatrix.com/projects/core/documentation/howto/async.html

Or manually using select().

> Basically what I mean is that I dispatch a thread and when the
> thread completes it invokes a method from the calling thread. 
> Sort event driven concept with threads.

What you describe here isn't the only way to do asynchronous
callbacks. See above for a simpler way.

Regards,


Bj?rn

-- 
BOFH excuse #233:

TCP/IP UDP alarm threshold is set too low.



From george.sakkis at gmail.com  Tue Nov 21 14:04:23 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Nov 2006 11:04:23 -0800
Subject: Why is class decorator on method loosing self?
References: <mailman.535.1164117922.32031.python-list@python.org>
Message-ID: <1164135863.270437.80340@b28g2000cwb.googlegroups.com>

c james wrote:

> I want to use the LRU decorator posted at
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498110
> on a class method.  However, it complains about missing arguments. The
> missing argument is `self`.  I could use @classmethod but what I really
> need is an instance method.  I don't see how and was hoping someone else
> might know the way.
>
> Here is an example with taking that recipe as lru.py
>
> import lru
>
> class Foo(object):
>      def banner(self):
>          print "Testing method"
>
>      @memoize(3)
>      def min_max(self, sequence):
>          self.banner()
>          return min(sequence), max(sequence)
>
> foo = Foo()
> print foo.min_max([9,7,5,3,1])
>
>
> Traceback (most recent call last):
> ...
>    File "lru.py", line 48, in __call__
>      value = self.func(*args, **kwargs)
> TypeError: min_max() takes exactly 2 arguments (1 given)


I don't think you can make it work without resorting to metaclass
magic. At the point of decoration min_max is still a function, not a
method, because class Foo has not been created yet. Here's a way to do
it with a custom metaclass; whether you really want to do it is a
different matter:

First off, remove the decoratorargs class and have memoize inherit from
object:

class memoize(object):
    # class body stays the same

Then add the following:


# this is general enough to be moved to a separate module
class CustomizeMeta(type):
    def __init__(cls, name, bases,dict):
        for attr,val in dict.iteritems():
            if hasattr(val, '__customize'):
                setattr(cls, attr, getattr(val,'__customize')(cls))


def memoizefunction(*args, **kwds):
    return lambda func: memoize(func, *args, **kwds)


def memoizemethod(*args, **kwds):
    from types import MethodType
    def wrapper(func):
        func.__customize = lambda cls: \
                    MethodType(memoize(func,*args,**kwds), None, cls)
        return func
    return wrapper

#==== examples =============================================

@memoizefunction(3)
def fib(n):
    return (n > 1) and (fib(n - 1) + fib(n - 2)) or 1


class Foo(object):
    __metaclass__ = CustomizeMeta

    def __init__(self, i): self._i = i

    def banner(self):
        print "Testing method"

    @memoizemethod(3)
    def min_max(self, sequence):
        self.banner()
        return min(sequence), max(sequence)

foo = Foo()
print foo.min_max([9,7,5,3,1])


George



From metaperl at gmail.com  Mon Nov 27 15:03:00 2006
From: metaperl at gmail.com (metaperl)
Date: 27 Nov 2006 12:03:00 -0800
Subject: Generating header information using ElementTree
In-Reply-To: <1164587885.050983.282680@l39g2000cwd.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
	<4suidqF10rlh1U1@mid.uni-berlin.de>
	<1164583078.233238.227010@45g2000cws.googlegroups.com>
	<1164586070.655741.256800@h54g2000cwb.googlegroups.com>
	<1164587885.050983.282680@l39g2000cwd.googlegroups.com>
Message-ID: <1164657780.012257.146870@h54g2000cwb.googlegroups.com>

And dont forget that you can use triple quotes to get rid of all the
quote-escaping you are using:

$ python
>>> """
... <elem attr="hi">
... ho
... </elem>
... """
'\n<elem attr="hi">\nho\n</elem>\n'
>>>


Craig wrote:
> John Machin wrote:
>
> > Craig wrote:
> >
> > > Great.  Got that sorted.  The problem I have now is that some of the
> > > XML data is not copied across to the file when I have the text
> > > information included.  The number of characters that is lost is equal
> > > to the number of characters that is in the block of text I entered
> > > before.  The code I am using is:
> > >
> > > def WriteXMLRecord ( record, XMLFileBaseName, root):
> > > RecordName = SubElement(root, "Log")
> > >     #iterate through all the fields in the record
> > >     for key in record:
> > >         # write the key and its data
> > >         test = SubElement(RecordName, key)
> > >         test.text = str(record[key])
> > >     tree = ElementTree(root)
> > >     tree.write(XMLFileBaseName)
> >
> > I'm guessing, based on reading the docs for the write method, that you
> > should be using the file handle, rather than the file name, if the file
> > is already opened. So (1) change the name of the 2nd arg to
> > XMLFileHandle or somesuch, and in the caller, use outFile (the handle)
> > instead of "record.xml".
> >
> > >
> > > def main():
> > >     outFile = open("record.xml", 'w')
> > >     outFile.write("""<?xml version=\"1.0\"?>
> > > <?xml-stylesheet type=\"text/xsl\" href=\"test.xsl\"?>
> > > <!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n\n""")
> > >
> > >     root = Element("Log")
> > >     WriteXMLRecord(data1, "record.xml", root)
> > >     WriteXMLRecord(data2, "record.xml", root)
> > >     WriteXMLRecord(data3, "record.xml", root)
> > >     outFile.close()
> > >
> > HTH,
> > John
> 
> Great.  Got it.  Thanks so much for all your help.
> 
> 
> Craig



From f.braennstroem at gmx.de  Sat Nov  4 09:29:00 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 4 Nov 2006 15:29:00 +0100
Subject: small python cgi webserver
References: <mailman.1760.1162630079.11739.python-list@python.org>
	<1162635479.491109.15640@h54g2000cwb.googlegroups.com>
	<mailman.1761.1162636919.11739.python-list@python.org>
	<eii08d$8ki$1@online.de>
Message-ID: <eii83a$mek$1@sea.gmane.org>

Hi Norbert,

* Norbert Kaufmann <norbert at akumakun.de> wrote:
> Fabian Braennstroem wrote:
> [...]
>> 
>> Maybe, I understood something wrong, but I thought that the
>> above 'webserver' script would replace apache in my case; at
>> least I hoped!?
>> 
>
> It does. The 'ServerRoot' and 'DocumentRoot' directories are the
> directories you are starting your webserver in.
> Create a 'cgi' directory inside this and consider that you have to name
> it in the serverscript in relation to the serverroot!
>
> <quote>
> cgi_directories=["/home/fab/Desktop/cgi-bin"]
> </quote>
>
> This means you have to start your server inside directory '/'.

I tried this, but it does not help ... a wait, the leading
'/' is the problem. Thanks!
>
> If you start your server in your home dir '/home/fab' then you have to
> name your cgi_directories ['/Desktop/cgi-bin'].
>
> In your response (cgi-script) you have to divide the header from the
> content '\r\n\r\n'.

I am not sure, what that means!?  ... but it works :-)

Greetings!
 Fabian



From inq1ltd at verizon.net  Sat Nov  4 19:52:07 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sat, 04 Nov 2006 19:52:07 -0500
Subject: disabledforeground or similar for Entry (in Tkinter)
In-Reply-To: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
References: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
Message-ID: <200611041952.07546.inq1ltd@verizon.net>

On Saturday 04 November 2006 11:03, Dustan wrote:
> Back in this post, I attempted to make a label
> look like a button:
> http://groups.google.com/group/comp.lang.python
>/browse_thread/thread/a83195d3970a6851/2053cbaec
>1bc1f19?auth=DQAAAHkAAAAMDAWnhNnzpuKlwOKZUwAGUTt
>T2Ay-EAB7rCY6SnwfnDzZ98M37bZDW2Is0LrBVrr8XEgPfcu
>OkiUE-CrSsKbBSX-67voDUXfbATBd0eYNMClezby4EXT2fuL
>m6f0llJ_xMO8BfkjVho_7CZvlf_9tNGnJixTbq8zr21ODZBh
>ouQ
>
> Alright, I've learned my lesson - don't use a
> new widget; modify the old one.
>
> Except the Entry widget doesn't have a
> disabledforeground option. Neither does the
> Text widget, but IDLE seems to accomplish
> making a disabled Text look the same as an
> enabled Text in the IDLE Help section.
>
> No, foreground (fg) and background (bg) don't
> make a difference; it still changes the color
> of the Entry widget upon disabling.
>
> There must be something I'm missing here...

My previous post was hasty and we all know,  
"Haste makes waste."

Try this;

If you use wiget-01.pack_forget() or 
wiget-01.grid_forget(),  you can now build 
wiget-02 using wiget-02.pack or grid() for the 
same location. 

You can reinstall uninstalled wigets by using 
pack() or grid() again for those hidden wigets. 
However only after uninstalling for the wigets in 
those locations. 



root = Tk()

test1 = Button(root, text='Test No.1 button', bg = 
'yellow', width = 15, height = 10)
test1.grid(row=0, column=0)
test1.grid_forget()


test2 = Button(root, text='Test #2 button', bg = 
'green', width = 15, height = 10)
test2.grid(row=0, column=0)

mainloop()


jim-on-linux

http://www.inqvista.com











From ronrsr at gmail.com  Fri Nov 10 12:30:27 2006
From: ronrsr at gmail.com (ronrsr)
Date: 10 Nov 2006 09:30:27 -0800
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <1163179622.691812.96170@h48g2000cwc.googlegroups.com>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>
	<1163178581.231837.18120@h48g2000cwc.googlegroups.com>
	<ej2ce8$vsc$1@cernne03.cern.ch>
	<1163179622.691812.96170@h48g2000cwc.googlegroups.com>
Message-ID: <1163179827.707089.48920@m73g2000cwd.googlegroups.com>

the syntax error comes in the main program, in any line that follows
the import statement.


ronrsr wrote:
> the exact code that is triggering the error message is:
>
> zc = zsql.connect()
>
>
> exact error message:  SyntaxError:  Invalid Syntax
>
>
> but any statement that follows the import statement will trigger it.
>
> bests,
>
> r-sr-
>
>
>
>
> Roberto Bonvallet wrote:
> > ronrsr wrote:
> > > thanks for the speedy answer.  what i meant was:
> > >
>
> > Could you please copy and paste the exact code that is triggering the
> > error, and the exact error message?
> >
> > (BTW, in Python you don't need to end your statements with a semi-colon)
> > -- 
> > Roberto Bonvallet



From cemerick at snowtide.com  Sat Nov 18 10:34:15 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Sat, 18 Nov 2006 10:34:15 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejmm4d$guk$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>
	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>
	<ejmm4d$guk$1@sea.gmane.org>
Message-ID: <894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>


On Nov 18, 2006, at 5:09 AM, Fredrik Lundh wrote:

> Uche Ogbuji wrote:
>
>> I certainly have never liked the aspects of the ElementTree API under
>> present discussion.  But that's not as important as the fact that I
>> think the above statement is misleading.  There has always been a
>> battle in XML between the people who think the serialization is
>> preeminent, and those who believe some data model is preeminent, but
>> the reality is that XML 1.0 (an 1.1) is a spec *defined* by its
>> serialization.
>
> sure, the computing world is and has always been full of people who  
> want
> the simplest thing to look a lot harder than it actually is.  after  
> all,
> *they* spent lots of time reading all the specifications, they've  
> bought
> all the books, and went to all the seminars, so it's simply not fair
> when others are cheating.

[snip]

> and keep patting our-
> selves on the back, while the rest of the world is busy routing around
> us, switching to well-understood XML subsets or other serialization
> formats, simpler and more flexible data models, simpler API:s, and
> more robust code.  and Python ;-)

That's flatly unrealistic.  If you'll remember, I'm not one of "those  
people" that are specification-driven -- I hadn't even *heard* of  
Infoset until earlier this week!  However, I am driven to ensure that  
the code I (and we) write works *as others expect* when confronted by  
any of the billions of XML documents out there.  Simpler is better,  
and better is better (thus why I am in python-land), unless that  
simplicity makes it difficult to play nicely with others.  Shrugging  
off the way everyone else does things reminds me of various CSS  
fanatics I know of that simply won't use tables or IE CSS  
compatibility hacks, even if that's what's needed to get things to work.

I've never been involved in any "XML battles", but to Uche's point, I  
would speculate (only on the basis of personal interactions and  
anecdotes) that some overwhelming majority of the developers out  
there care for nothing but the serialization, simply because that's  
how one plays nicely with others.  I would count myself in that group  
as well, although I do recognize that there is a worthy academic  
exercise in exploring the data-model-centric XML worldview.

OT: Uche, 4suite XML is tops!  Thank you very much for that.

- Chas


From farraige at go2.pl  Wed Nov  8 05:18:14 2006
From: farraige at go2.pl (Farraige)
Date: 8 Nov 2006 02:18:14 -0800
Subject: please help with optimisation of this code - update of given table
	according to another table
Message-ID: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>

Hi I need your help...
I am implementing the method that updates given table (table is
represented as list of lists of strings) according to other table (some
kind of merging)...

This method takes following arguments:
t1                               - table we would like to update
t2                               - table we would like to take data
from
keyColumns                - list of key indexes e.g. [0,1]
columnsToBeUpdated -  list of column indexes we would like to update in
our table T1 e.g [2,4]

Let's say we have a table T1:

A B C D E
---------------
1 4  5  7 7
3 4  0  0 0

and we call a method mergeTable(T1, T2, [0,1], [2,4])

It means that we would like to update columns C and E of table T1 with
data from table T2 but only in case the key columns A and B are equal
in both tables.... I grant that the given key is unique in both tables
so if I find a row with the same key in table T2 I do merging, stop and
go to next row in table T1...

Let's say T2 looks following:

A B C D E
---------------
2 2  8 8 8
1 4  9 9 9

So after execution of our   mergeTable method, the table T1 should look
like :

A B C D E
1 4  9  7 9
3 4  0 0  0

The 2nd row ['3', '4',  '0' ,'0',  '0'] didn't change because there was
no row in table T2 with key = 3 ,4

The main part of my algorithm now looks something like ...

merge(t1, t2, keyColumns, columnsToBeUpdated)

.......

        for row_t1 in t1:
            for  row_t2 in t2:
                if [row_t1[i] for i in keyColumns] == [row_t2[j] for j
in keyColumns]:
                    # the keys are the same
                    for colName in columnsToBeUpdated:
                        row_t1[colName] = row_t2[colName]

                    # go outside the inner loop - we found a row with
                    # the same key in the table
                    break

In my algorithm I have 2 for loops and I have no idea how to optimise
it (maybe with map? )
I call this method for very large data and the performance is a
critical issue for me :(

I will be grateful for any ideas
Thanks in advance!



From fredrik at pythonware.com  Mon Nov 13 10:41:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 16:41:23 +0100
Subject: httplib.InvalidURL: nonnumeric port: For
	charactersintheproxypassword in URL
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com><1163424914.967174.302610@e3g2000cwe.googlegroups.com><mailman.59.1163426414.32031.python-list@python.org>
	<1163431557.397172.175850@f16g2000cwb.googlegroups.com>
Message-ID: <eja3n1$sgk$1@sea.gmane.org>

"Phoe6" wrote:

> proxy_password = urllib.quote(proxy_password_orig)

make that:

    proxy_password = urllib.quote(proxy_password_orig, "")

</F> 





From DustanGroups at gmail.com  Sun Nov 12 11:10:35 2006
From: DustanGroups at gmail.com (Dustan)
Date: 12 Nov 2006 08:10:35 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.0.1163325764.32031.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
	<mailman.0.1163325764.32031.python-list@python.org>
Message-ID: <1163347835.815187.216180@e3g2000cwe.googlegroups.com>

Alright, I can see I'm a bit outvoted here. I tried your suggestions
and it worked fine.

I'll also try to consider in the future that part of the problem might
be lack of information conveyed on my part.



From hakonrk at fys.uio.no  Sat Nov 11 15:37:35 2006
From: hakonrk at fys.uio.no (Haakon Riiser)
Date: Sat, 11 Nov 2006 20:37:35 +0000 (UTC)
Subject: httplib continuation packets
Message-ID: <slrnelcd4f.jtl.hakonrk@fox.venod.com>

After a long debugging session while scripting my webmail,
I believe I have traced the problem to the way httplib sends
POST requests.

I have compared tcpdump listings from Python 2.4.3 and 2.5.0's
httplib (via urllib/urllib2), Perl's LWP::UserAgent 2.033 and
Firefox 2.0.  Only Python sends the request in such a way that
the mailserver closes the connection before I get any data from
the POST request (immediate FIN packet after the POST request).

httplib always sends the urlencoded POST data in a separate packet
from the HTTP headers, and this seems to cause problems with
the web interface in Ipswitch-IMail/8.05 (the software running on
Doteasy's webmail).

Firefox 2.0 has most of the headers in a single packet, but unlike
httplib, it always places a couple of headers in the continuation
packet as well (usually the content-length and content-type
headers).

LWP::UserAgent 2.033 doesn't use continuation at all, and sends
everything in a single packet.

Is this a bug in httplib or the web server?  Is there a
workaround, or should I use Perl for this?

-- 
 Haakon


From gagsl-py at yahoo.com.ar  Thu Nov  9 15:36:38 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 17:36:38 -0300
Subject: cross connecting
In-Reply-To: <f4cc03640611091217o77d966f6y2e8082bae09a2590@mail.gmail.co
 m>
References: <f4cc03640611091217o77d966f6y2e8082bae09a2590@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061109173013.03fd1890@yahoo.com.ar>

At Thursday 9/11/2006 17:17, km wrote:

>I have a c executable in machine A which cannot execute on B.
>I am on machine B and i need python program to connect to A via 
>telnet  and run the program with arguments passed from program on 
>B  and at the end fetch back  results to machine B.
>i would like to know , which set of modules are suitable for this 
>sort of a work ?

Using rsh (linux) or psexec (windows; www.sysinternals.com) you can 
execute *any* program remotely (of course certain security constraints apply).
 From the python point of view, you're executing a command and 
capturing its output; use the subprocess module.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From andymac at bullseye.apana.org.au  Thu Nov  9 16:57:48 2006
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Fri, 10 Nov 2006 07:57:48 +1000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <45533D9F.5020002@chamonix.reportlab.co.uk>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>
	<45533D9F.5020002@chamonix.reportlab.co.uk>
Message-ID: <4553A45B.6080603@bullseye.andymac.org>

Robin Becker wrote:

> I think it uses sysv semaphores and although freeBSD 6 has them perhaps there's 
> something I need to do to allow them to work.

IIRC, you need to explicitly configure loading the kernel module, or
compile the kernel with the necessary option in the config file.

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


From paddy3118 at netscape.net  Thu Nov 23 00:13:08 2006
From: paddy3118 at netscape.net (Paddy)
Date: 22 Nov 2006 21:13:08 -0800
Subject: Abelson and Python
In-Reply-To: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
Message-ID: <1164258788.650158.118150@h54g2000cwb.googlegroups.com>


bearophileHUGS at lycos.com wrote:

> While studying the SICP video lectures I have to twist my mind some to
> completely understand the lessons. I implement the programs shown there
> in both Python and Scheme, and I find the Python implementations
> simpler to write (but it's not a fair comparison because I know very
> little Scheme still).
>
> Now some things are changing:
> http://lambda-the-ultimate.org/node/1840
>
> >The MIT is going to change its curriculum structure that was famous for teaching Scheme in introductory courses. One force behind the reform is no one else than Harold Abelson, famous for his marvelous Scheme opus SICP.<
> >The first four weeks of C1 will be a lot like the first four weeks of 6.001, Abelson said. The difference is that programming will be done in Python and not Scheme.<
>
>
> Someone is translating the SIPC programs in Python too:
> http://www.codepoetics.com/wiki/index.php?title=Topics:SICP_in_other_languages#Python
>
> With slides and code from lectures:
> http://courses.csail.mit.edu/6.01/
> http://courses.csail.mit.edu/6.01/fall06/calendar.html
>
> I like Scheme a bit too, but I consider this is a small victory for
> Python :-)
>
> Bye,
> bearophile

Hi Bearophile.
(Is your name pronounced Beer-owe-file, or Bear-oh-fi-lee, just
wondered :-) ?

I too have heard about the MIT course changing to Python elsewhere and
wanted to know why it was talked about so much? I'm from England, I
know that MIT is a very prestigious university, but if Cambridge
changed a course, or better still, The Open University changed a
similar course to Python, I think I'd be hard pressed to hear about it.
Is the MIT course syndicated to Universities around America or
something?

Cheers,  Paddy.



From stefan.behnel-n05pAM at web.de  Thu Nov 16 08:35:12 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 16 Nov 2006 14:35:12 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <mailman.229.1163664623.32031.python-list@python.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>
	<mailman.229.1163664623.32031.python-list@python.org>
Message-ID: <455C6910.9010209@web.de>

Fredrik Lundh wrote:
> Stefan Behnel wrote:
> 
>> If you want to copy part of of removed element back into the tree,
>> feel free to do so.
> 
> and that can of course be done with a short helper function.

Oh, and obviously with a custom Element class in lxml that does this
automatically for you behind the scenes.

http://codespeak.net/lxml/element_classes.html
http://codespeak.net/lxml/element_classes.html#default-class-lookup

Stefan


From utabintarbo at gmail.com  Wed Nov  8 07:47:09 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 8 Nov 2006 04:47:09 -0800
Subject: Searching for a module to generate GUI events
In-Reply-To: <eis853$92c$1@kohl.informatik.uni-bremen.de>
References: <eis853$92c$1@kohl.informatik.uni-bremen.de>
Message-ID: <1162990029.409193.246830@b28g2000cwb.googlegroups.com>


Stephan Kuhagen wrote:
> Hello
>
> I'm searching for a Python Module which is able to generate GUI events on
> different platforms (at least X11 and Windows, MacOSX would be nice), but
> without being a GUI toolkit itself. So PyTk is not a choice, because I need
> to use it, to control GUIs of other Programs. I want to generate Mouse
> events (move, click etc.) and keyboard events and inject them directly into
> the event-queue of the underlying window system.
>
> Does somebody know such a module or do I have to utilize platform specific
> tools from within Python?
>
> Regards and Thanks
> Stephan

http://pywinauto.pbwiki.com/ for Win32



From fredrik at pythonware.com  Thu Nov 23 04:56:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 10:56:32 +0100
Subject: Finding the carret position in a regular expression
In-Reply-To: <1164274616.881372.276400@l39g2000cwd.googlegroups.com>
References: <1164274616.881372.276400@l39g2000cwd.googlegroups.com>
Message-ID: <ek3r8h$se2$1@sea.gmane.org>

Tool69 wrote:

> supposed I've got the following text :
> 
> mytext = "for <myvar> in <somelist>:"
> 
> with the following simple pattern : pattern = "<[a-z]+>"
> 
> I use re.findall(pattern, mytext) wich returns :
> ['<myvar>','<somelist>']
> 
> Now, I want my prog to return the positions of the returned list
> elements, ie :
> <myvar> was found at position 5 in mytext
> <somelist> was found at position 16 in mytext

"findall" doesn't return that information; use "finditer" instead, and 
use the "span" or "start" method on the returned match object to get the 
position:

     for m in re.finditer(pattern, mytext):
         print m.span()

</F>



From dimitri.pater at gmail.com  Sat Nov 18 18:25:44 2006
From: dimitri.pater at gmail.com (dimitri pater)
Date: Sun, 19 Nov 2006 00:25:44 +0100
Subject: What do I look for in a shared Python host?
In-Reply-To: <1163877328.071239.191260@f16g2000cwb.googlegroups.com>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
	<1163877328.071239.191260@f16g2000cwb.googlegroups.com>
Message-ID: <e75321bd0611181525k51fd8830pdc9fca7f3d9e690d@mail.gmail.com>

Hi,
is there any reason for you wanting to use a shared host? Just asking..
Maybe you could use a VPS as this is not too expensive these days. Of
course, it would require more work to set things up. But it's not too
hard... (eg using apt-get,webmin,some basic Linux skills using the command
line)
regards,
Dimitri
(I use a VPS at rimuhostig ($20/month), but there are many, many more)

On 18 Nov 2006 11:15:28 -0800, Fuzzyman <fuzzyman at gmail.com> wrote:
>
>
> walterbyrd wrote:
> > For example:
> >
> > - If I want to use Django, I need either FastCGI or Apache
> > 2.X/mod_python 3.x
> >
> > - if I want to use TurboGears, I need Python 2.4: not 2.3 and not 2.5
> >
> > - I have just learned that some hosters have T&Cs that forbid long
> > running processes. I am not sure exactly what that means. Except I
> > understand it can be a problem if using Cherrypy/TurboGears
> >
> > - I have read that mod_python before 3.x can be difficult
> >
> > What other "gotchas" would I look for?
>
> The best host for Python (including Django and Turbogears), try
> webfaction. They used to be known as Python-hosting.com and offer great
> support for Python.
>
> Fuzzyman
> http://www.voidspace.org.uk/index2.shtml
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
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From i80and at gmail.com  Thu Nov  9 22:50:57 2006
From: i80and at gmail.com (i80and)
Date: 9 Nov 2006 19:50:57 -0800
Subject: Having problems with urlparser concatenation
In-Reply-To: <mailman.2005.1163116441.11739.python-list@python.org>
References: <1163114626.595813.286260@b28g2000cwb.googlegroups.com>
	<mailman.2005.1163116441.11739.python-list@python.org>
Message-ID: <1163130657.069453.278140@m7g2000cwm.googlegroups.com>

Thank you!  Fixed my problem perfectly!
Gabriel Genellina wrote:
> At Thursday 9/11/2006 20:23, i80and wrote:
>
> >I'm working on a basic web spider, and I'm having problems with the
> >urlparser.
> >[...]
> >             SpliceStart = Website.find('<a href="', (i+1))
> >             SpliceEnd = (Website.find('">', SpliceStart))
> >
> >             ParsedURL =
> >urlparse((Website[SpliceStart+9:(SpliceEnd+1)]))
> >             robotparser.set_url(ParsedURL.hostname + '/' +
> >'robots.txt')
> >-----
> >Traceback (most recent call last):
> >   File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
> >line 120, in <module>
> >     FindLinks(Website)
> >   File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
> >line 84, in FindLinks
> >     robotparser.read()
> >   File "C:\Program Files\Python25\lib\robotparser.py", line 61, in read
> >     f = opener.open(self.url)
> >   File "C:\Program Files\Python25\lib\urllib.py", line 190, in open
> >     return getattr(self, name)(url)
> >   File "C:\Program Files\Python25\lib\urllib.py", line 451, in
> >open_file
> >     return self.open_local_file(url)
> >   File "C:\Program Files\Python25\lib\urllib.py", line 465, in
> >open_local_file
> >     raise IOError(e.errno, e.strerror, e.filename)
> >IOError: [Errno 2] The system cannot find the path specified:
> >'en.wikipedia.org\\robots.txt'
> >
> >Note the last line 'en.wikipedia.org\\robots.txt'.  I want
> >'en.wikipedia.org/robots.txt'!  What am I doing wrong?
>
> No, you don't want 'en.wikipedia.org/robots.txt'; you want
> 'http://en.wikipedia.org/robots.txt'
> urllib treats the former as a file: request, here the \\ in the
> normalized path.
> You are parsing the link and then building a new URI using ONLY the
> hostname part; that's wrong. Use urljoin(ParsedURL, '/robots.txt') instead.
>
> You may try Beautiful Soup for a better HTML parsing.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar



From kw at kevin-walzer.com  Fri Nov  3 13:19:35 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Fri, 03 Nov 2006 13:19:35 -0500
Subject: setting up wxPython on a Mac
In-Reply-To: <mailman.1724.1162574966.11739.python-list@python.org>
References: <mailman.1719.1162571053.11739.python-list@python.org>	<454B6DB4.4040107@kevin-walzer.com>
	<mailman.1724.1162574966.11739.python-list@python.org>
Message-ID: <454B8837.9060103@kevin-walzer.com>

Brian Blais wrote:
> Kevin Walzer wrote:
>> Brian Blais wrote:
>>> Hello,
>>>
>>> I have a wxPython program that I would like to give to a friend of mine
>>> who has a Mac.  Is there a resource out there that can tell me what
>>> steps I need to follow to do this?
>> Install Python from the Python website--a Python 2.5 installer is
>> available for the Mac.
>>
>> Install wxPython from the wxPython website--an installer for the latest
>> version of wxPython for the Mac is also available.
>>
>> That should do it.
>>
> 
> sounds easy.  If I need the numpy/scipy/matplotlib combo, is it that
> straightforward?  On windows it is, on Linux is definitely is not.
> 
> thanks,
> 
>         bb
> 
> 
I'm not sure about numpy/scipy/matplotlib. I don't think there are
pre-built packages for them; you may have to build them from source. You
could also post to the MacPython mailing list, someone there has
probably looked at this already.

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


From bignose+hates-spam at benfinney.id.au  Tue Nov 21 20:31:14 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 22 Nov 2006 12:31:14 +1100
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
	<7.0.1.0.0.20061121213222.041021c8@yahoo.com.ar>
Message-ID: <873b8cw9lp.fsf@benfinney.id.au>

Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:

> The only thing Python can guarantee, is that the left expression is
> evaluated before the right one (5.13 Evaluation order, Language
> Reference).

Thanks, that answers my question asked elsewhere.

-- 
 \          "One thing vampire children have to be taught early on is, |
  `\                   don't run with a wooden stake."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From nick at craig-wood.com  Wed Nov 29 07:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 29 Nov 2006 06:30:03 -0600
Subject: Wrapping A Shell
References: <mailman.811.1164742722.32031.python-list@python.org>
Message-ID: <slrnemqsus.hje.nick@irishsea.home.craig-wood.com>

Jeremy Moles <jeremy at emperorlinux.com> wrote:
>  I'm not sure if this is really the right place to ask this question, but
>  since the implementation is in Python, I figured I'd give it a shot.
> 
>  I want to "wrap" a shell process using popen inside of python program
>  rather than creating a new shell process for each line I process in the
>  app. For example, the code might look like:
> 
> 
>  	std = stdin, stdout, stderr = os.popen3("bash")
> 
>  	print >> stdin, "ls"
> 
>  	print stdout.readline()
> 
>  However, it appears my understanding of popen (or perhaps buffered IO)
>  is off somewhere, because this certainly doesn't work anything like I
>  expect it to (it hangs on stdout.readline).
> 
>  Obviously the example above is very contrived, but eventually I'll be
>  using this in an OpenGL "terminal" widget. Am I approaching this the
>  wrong way?

Short answer: use pexpect

  http://pexpect.sourceforge.net/

Long answer:

Firstly modern pythonistas use subprocess instead of os.popen*.

Secondly, buffering is going to cause you trouble and possible
deadlocks.

There are two ways to rid yourself of deadlock.

1) read and write from seperate threads / processes.  This is the
traditional unix way

2) use non blocking IO

Here is a possible way to solve the problems with subprocess (unix
only) and non blocking IO.

However I suspect you really want to use pexpect for this job...

from os import O_NONBLOCK
from errno import EAGAIN
from subprocess import Popen, PIPE
from fcntl import fcntl, F_SETFL, F_GETFL
from time import time

p = Popen(["/bin/bash", "-i"], shell=False, bufsize=0, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)

# Make output streams non blocking (unix only)
for fd in (p.stdout.fileno(), p.stderr.fileno()):
    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK)

def read_output(p, timeout=1.0):
    """Read the output from the subprocess, with timeout"""
    end_time = time() + timeout
    output = ""
    while time() < end_time:
        try:
            output += p.stdout.read(1024)
        except IOError, e:
            if e.errno != EAGAIN:
                raise
    return output

p.stdin.write("ls\n")
print read_output(p)
p.stdin.write("uname -a\n")
print read_output(p)

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


From robin at alldunn.com  Wed Nov  8 10:47:38 2006
From: robin at alldunn.com (Robin Dunn)
Date: Wed, 08 Nov 2006 07:47:38 -0800
Subject: ANN: wxPython 2.7.2.0
In-Reply-To: <20061108151134.73765.qmail@web51113.mail.yahoo.com>
References: <20061108151134.73765.qmail@web51113.mail.yahoo.com>
Message-ID: <4551FC1A.9090606@alldunn.com>

Kenneth Long wrote:
> Is there a new version of Demo Docs released also?
> 
> I get this error from Sourceforge after clicking on
> the  link at wxPython page.
> 
> Could not read file.
> 
> Go back.
> /home/ftp/pub/sourceforge//w/wx/wxpython/wxPython2.7-win32-docs-demos-2.7.2.0.exe

Looks like there was an error when building that installer file.  I'll 
get it fixed and upload it again soon.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From deets at nospam.web.de  Thu Nov 16 04:07:56 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Nov 2006 10:07:56 +0100
Subject: How to make a python file to a DLL?
In-Reply-To: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
References: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
Message-ID: <4s2o3aFtt1umU1@mid.uni-berlin.de>

many_years_after schrieb:
> Any solution?

http://wiki.python.org/moin/elmer



From bytter at gmail.com  Wed Nov 29 12:51:04 2006
From: bytter at gmail.com (Bytter)
Date: 29 Nov 2006 09:51:04 -0800
Subject: libboost, python, and dijkstra shortest path
Message-ID: <1164822664.826189.28760@80g2000cwy.googlegroups.com>

Hi everyone,

I need to implement a very quick (performance-wise) Dijkstra shortest
path in python, and found that libboost already has such thing. Problem
is: I cannot find the installation package for my Python 2.4 under
windows. Can someone please provide me instructions for installing
libboost for python?

In alternative, if someone can point out to a fast Dijkstra shortest
path in python (the network is over 1 million vertexes), I would
appreciate.

Thanks in advance,

Hugo Ferreira



From bdesth.quelquechose at free.quelquepart.fr  Wed Nov  8 17:54:04 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 08 Nov 2006 23:54:04 +0100
Subject: is this the right way to do subclasses?
In-Reply-To: <45524f40$0$32365$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45524f40$0$32365$c3e8da3@news.astraweb.com>
Message-ID: <45525b3e$0$32029$426a34cc@news.free.fr>

John Salerno a ?crit :
> Peter Otten wrote:
> 
>> You may need a no-op implementation of fix_attributes() in the Character
>> class.
> 
> 
> What does that mean? Is that in case I use Character directly to create 
> an object?

Most propbably it can be useful for other character classes that don't 
need too fix attributes.

> Would that just be a 'pass' statement?

Yes.


From podi.ex at gmail.com  Thu Nov  9 21:56:51 2006
From: podi.ex at gmail.com (Podi)
Date: 9 Nov 2006 18:56:51 -0800
Subject: urllib en https
In-Reply-To: <87r6yby5d8.fsf@pobox.com>
References: <4508649d$0$4521$e4fe514c@news.xs4all.nl>
	<4508720c$0$4520$e4fe514c@news.xs4all.nl>
	<2C6Og.1077$UG4.342@newsread2.news.pas.earthlink.net>
	<87r6yby5d8.fsf@pobox.com>
Message-ID: <1163127410.938230.180740@h54g2000cwb.googlegroups.com>


> > 	As I recall, ActiveState doesn't distribute the SSL package that the
> > python.org package contains. But... It is possible to copy the SSL
> > related files from a python.org package into the ActiveState
> > installation.
>

Are there any instructions on doing this? My Python installation from
cygwin seems to have SSL but not the ActiveState. However, I really
like the ActiveState PythonWin UI.

I would be much appreciated if anyone can provide pointer to get the
SSL in AS Python to work.

Thanks in advance.
P



From Roberto.Bonvallet at cern.ch  Thu Nov 30 08:21:55 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 30 Nov 2006 13:21:55 +0000 (UTC)
Subject: PythonTidy
References: <mailman.865.1164854694.32031.python-list@python.org>
Message-ID: <ekmltj$36d$1@cernne03.cern.ch>

Chuck Rhode wrote:
> I couldn't find a routine to clean up, regularize, and reformat Python
> code, so I wrote one:
> 
>  http://www.lacusveris.com/PythonTidy/PythonTidy.python
> 
> Now, I'm looking for beta-testers.  Compensation is a bit on the low
> side.  In fact it's limited to the satisfaction of helping out.

$ cat test.py
#!/usr/bin/env python2.5
# vim: set fileencoding=utf-8 :

for i in xrange ( 3) :
  print   i

$ python2.5 PythonTidy.python < test.py
#!/usr/bin/python
# -*- coding: utf-8 -*-

for i in xrange(3):
    print i

About changing the shebang line:  I'll take it as a bug.
About changing the encoding declaration from vim-style to emacs-style:
I'll take it as an insult :)

Both are comments, and should be left that way.  Besides, there is no
officially preferred way for each of them.  BTW, in a recent thread on
this newsgroup, most people said they preferred #!/usr/bin/env python over
#!/usb/bin/python for the shebang line. See http://tinyurl.com/yngmfr .

Best regards.
-- 
Roberto Bonvallet


From gabor at nekomancer.net  Fri Nov 17 05:35:47 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 11:35:47 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <mailman.309.1163746512.32031.python-list@python.org>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<mailman.309.1163746512.32031.python-list@python.org>
Message-ID: <e12a5$455d9084$59ad1aca$4315@news.flashnewsgroups.com>

Fredrik Lundh wrote:
> gabor wrote:
> 
>> get an Unicode-exception, as everywhere else. you see, exceptions are 
>> ok, i can deal with them.
> 
>> p.s: one additional note. if you code expects os.listdir to return 
>> unicode, that usually means that all your code uses unicode strings. 
>> which in turn means, that those filenames will somehow later interact 
>> with unicode strings. which means that that byte-string-filename will 
>> probably get auto-converted to unicode at a later point, and that 
>> auto-conversion will VERY probably fail
> 
> it will raise an exception, most likely.  didn't you just say that 
> exceptions were ok?

yes, but it's raised at the wrong place imho :)

(just to clarify: simply pointing out this behavior in the documentation 
is also one of the possible solutions)

for me the current behavior seems as if file-reading would work like this:

a = open('foo.txt')
data = a.read()
a.close()

print data
 >>> TheFileFromWhichYouHaveReadDidNotExistException


gabor


From inq1ltd at verizon.net  Thu Nov 16 01:28:57 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 16 Nov 2006 01:28:57 -0500
Subject: Press button to load data
In-Reply-To: <1163650825.563379.38550@b28g2000cwb.googlegroups.com>
References: <1163650825.563379.38550@b28g2000cwb.googlegroups.com>
Message-ID: <200611160128.57425.inq1ltd@verizon.net>


Just from a glance my thoughts are to 
start with one file and build on it. Make 
a class of it so you can loop it to use 
it over for each record.


You wrote that the info was in a file on 
the hd. If it is in a file on the hd, use the 
open() 
function, read from the file, only one record
and write the data to a list. 
   
You can incorporate the 
button option, 

"command = CallSomeFunction",

to call a function that builds a window,  
and loads the data into labels or
entry boxes.
If you are going to modify 
the data, entry boxes allow you to  
modify it and save it back to a 
file.

Also, when using the open() function,
close it after you get the data you need. 
otherwise you may experience 
unexpected problems.

client = open('client', 'r')
client.read() (readline()) (readlines())
client.close()

jim-on-linux

http//:www.inqvista.com





On Wednesday 15 November 2006 23:20, 
gilbert3b2g at msn.com wrote:
> I'm new to Python, and programming in general.
> What I'm trying to do here is to load a list of
> accounts from a file on my harddrive into a
> string of Buttons in Tkinter, and when I press
> one of the Buttons, which has one of my account
> name, it will load that account into a new
> window. But I don't understand how to code the
> proccess that would tell the program what
> account is selected. Any help with this would
> be very appreciated. Thanks in advance.
>
> from Tkinter import *
> import shelve
> from tkMessageBox import showerror
>
> shelvename = shelve.open('class-shelve2')
> cat = (' Name ', ' Account # ', ' Amount Due ',
> ' Date Due ')
>
> def NameFields(top):
>     name1 = Label(None, text=cat[0],
> relief=RIDGE, width=20, fg='blue', bg='white',
> font=('bold',15))
>     name2 = Label(None, text=cat[1],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name3 = Label(None, text=cat[2],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name4 = Label(None, text=cat[3],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name1.grid(row=0, column=0, sticky=NSEW)
>     name2.grid(row=0, column=1, sticky=NSEW)
>     name3.grid(row=0, column=2, sticky=NSEW)
>     name4.grid(row=0, column=3, sticky=NSEW)
>     top.columnconfigure(0, weight=1)
>     top.columnconfigure(1, weight=1)
>     top.columnconfigure(2, weight=1)
>     top.columnconfigure(3, weight=1)
>
>
> def DisplayBills(top):
>     c=0
>     for bill in shelvename:
>         bill1 = Button(None, text=
> shelvename[bill].name, font=('bold',10),
> command=fetchRecord) bill2 = Label(None, text=
> shelvename[bill].account, relief=RIDGE,
> font=('bold',10))
>         bill3 = Label(None, text=
> shelvename[bill].paymentDue, relief=RIDGE,
> font=('bold',10), fg='red') bill4 = Label(None,
> text= shelvename[bill].dateDue, relief=RIDGE,
> font=('bold',10))
>         bill1.grid(row=c, column=0,
> sticky=NSEW) bill2.grid(row=c,column=1,
> sticky=NSEW) bill3.grid(row=c,column=2,
> sticky=NSEW) bill4.grid(row=c,column=3,
> sticky=NSEW) c = c + 1
>
> def fetchRecord():
>
> top = Tk()
>
> DisplayBills(top), NameFields(top)
>
> mainloop()


From inq1ltd at verizon.net  Mon Nov 20 18:31:26 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 20 Nov 2006 18:31:26 -0500
Subject: OODB vs RDBMS
In-Reply-To: <45621a57$0$10443$426a74cc@news.free.fr>
References: <4se3omFv6reaU1@mid.individual.net>
	<45621a57$0$10443$426a74cc@news.free.fr>
Message-ID: <200611201831.26629.inq1ltd@verizon.net>

On Monday 20 November 2006 16:34, Bruno 
Desthuilliers wrote:
> Thomas Guettler a ?crit :
> > Hi,
>
> (snip lot of questions about OR mappers)
>
> http://www.sqlalchemy.org/

Thanks,
Verry interesting.

jim-on-linux
http://www.inqvista.com


From userprogoogle-139 at yahoo.co.uk  Wed Nov 15 04:24:43 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 15 Nov 2006 01:24:43 -0800
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
	<op.tiyra9e4rqur0o@eb.pragmadev>
	<1163506422.556251.12250@h54g2000cwb.googlegroups.com>
	<op.ti0fw9nlrqur0o@eb.pragmadev>
Message-ID: <1163582683.646470.67850@k70g2000cwa.googlegroups.com>

Thanks the fix you provided me with workds perfectly. 

Best,

rod



From dale at riverhall.nospam.co.uk  Wed Nov 22 09:20:16 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Wed, 22 Nov 2006 14:20:16 +0000
Subject: What's going on here?
Message-ID: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>

Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
[GCC 4.1.0 (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = object()
>>> a
<object object at 0xb7bbd438>
>>> a.spam = 1
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'object' object has no attribute 'spam'
>>> class b(object):
...    pass
...
>>> a = b()
>>> a
<__main__.b object at 0xb7b4dcac>
>>> a.spam = 1
>>>

What is subclassing adding to the class here? Why can't I assign to
attributes of an instance of object?
-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk



From walterbyrd at iname.com  Fri Nov 17 12:07:27 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 17 Nov 2006 09:07:27 -0800
Subject: Python v PHP for web, and restarting Apache?
Message-ID: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>

I think I have read somewhere that using Python to develop
web-applications requires some restarting of the Apache server, whereas
PHP does not.

Also, I seem to remember reading something about PHP being able to
recover from Apache restarting  more easily than Python.

I am not trying to suggest anything here. I'm just asking.



From thunderfoot at gmail.com  Fri Nov 17 10:02:00 2006
From: thunderfoot at gmail.com (thunderfoot at gmail.com)
Date: 17 Nov 2006 07:02:00 -0800
Subject: How to pass an argument to a python program open in IDLE?
References: <ZMG6h.110$nx.65@lon04-news-philips>
	<1163611493.817940.299130@f16g2000cwb.googlegroups.com>
	<1163772388.931433.129480@f16g2000cwb.googlegroups.com>
Message-ID: <1163775720.534373.116330@j44g2000cwa.googlegroups.com>


TonyHa wrote:
> Hello Josh,
>
> Thanks for the reply. But I am not sure I understand your reply, may be
> I need to explain my problem a bit more. I have a Python script which
> needs an input argument to run.
> e.g. python myscript.py xilinx. which run fine.
>
> My problem is this: When I start IDLE GUI, then I open my script with
> the edit window. (i.e.
> File -> open). I run my script under the edit window using run -> run
> module or F5. But IDLE does not allow me to input the argument to my
> script, i.e. IDLE runs without prompting for the argument, then my
> script fails. I wonder how can I pass the argument to my script under
> IDLE?
>
> Tony Ha.
>

Just check the number of arguments and prompt if the argument is
missing:

import sys

if __name__ == '__main__':
    numArgs = len(sys.argv)
    if numArgs == 1:
        myArg = raw_input('please supply missing argument: ')
    else:
        myArg = sys.argv[1]

    print 'argument : %s' % myArg



From 120psi at gmail.com  Fri Nov 24 10:25:42 2006
From: 120psi at gmail.com (120psi at gmail.com)
Date: 24 Nov 2006 07:25:42 -0800
Subject: Local variables persist in functions?
In-Reply-To: <Xns988554943C60Bduncanbooth@127.0.0.1>
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
	<Xns988554943C60Bduncanbooth@127.0.0.1>
Message-ID: <1164381942.446901.166860@j72g2000cwa.googlegroups.com>


> http://www.python.org/doc/faq/general.html#why-are-default-values-shared-between-objects

Thanks for the link.  I think I'll stick to None as the default value,
as that's a good way to keep the usability and make my code work ;)



From george.sakkis at gmail.com  Tue Nov 21 15:03:11 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Nov 2006 12:03:11 -0800
Subject: Why is class decorator on method loosing self?
References: <mailman.535.1164117922.32031.python-list@python.org>
	<1164135863.270437.80340@b28g2000cwb.googlegroups.com>
	<1164138933.778974.42620@f16g2000cwb.googlegroups.com>
Message-ID: <1164139391.883659.144770@m7g2000cwm.googlegroups.com>

George Sakkis wrote:

> Now you don't need memoizefunction and memoizemethod, but you still
> need the customized metaclass (changed __customize to _customize; name
> turns to a PITA sooner or later):

There was supposed to be a "mangling" after "name" (see, it's hard to
even spell it out correctly, let alone use it <wink>).

George



From steve at REMOVE.THIS.cybersource.com.au  Mon Nov  6 20:21:27 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 07 Nov 2006 12:21:27 +1100
Subject: forwarding *arg parameter
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
	<eilc3m$301a$1@ulysses.news.tiscali.de>
	<y2r3h.244$7b6.238@read3.inet.fi>
	<pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>
	<%oG3h.107$8a7.65@read3.inet.fi>
Message-ID: <pan.2006.11.07.01.21.17.654906@REMOVE.THIS.cybersource.com.au>

On Mon, 06 Nov 2006 13:03:55 +0000, Tuomas wrote:

> If you read the whole chain you find out what we were talking of.

I had already read the whole thread, and I've read it again in case I
missed something the first time, and I still have no idea why you think
you need to do this. You explain *what* you want to do, but not *why* you
want to do it.


-- 
Steven.



From g.brandl-nospam at gmx.net  Mon Nov  6 16:06:53 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 06 Nov 2006 22:06:53 +0100
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
Message-ID: <eio85e$5ad$1@news.albasani.net>

Thomas W wrote:
> I'm getting really annoyed with python in regards to
> unicode/ascii-encoding problems.
> 
> The string below is the encoding of the norwegian word "f?dselsdag".
> 
>>>> s = 'f\xc3\x83\xc2\xb8dselsdag'

Which encoding is this?

> I stored the string as "f?dselsdag" but somewhere in my code it got

You stored it where?

> translated into the mess above and I cannot get the original string
> back. It cannot be printed in the console or written a plain text-file.
> I've tried to convert it using
> 
>>>> s.encode('iso-8859-1')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)

Note that "encode" on a string object is often an indication for an error.
The encoding direction (for "normal" encodings, not special things like
the "zlib" codec) is as follows:

encode: from Unicode
decode: to Unicode

(the encode method of strings first DEcodes the string with the default
encoding, which is normally ascii, then ENcodes it with the given encoding)

>>>> s.encode('utf-8')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)
> 
> And nothing helps. I cannot remember hacing these problems in earlier
> versions of python and it's really annoying, even if it's my own fault
> somehow, handling of normal characters like this shouldn't cause this
> much hassle. Searching google for "codec can't decode byte" and
> UnicodeDecodeError etc. produces a bunch of hits so it's obvious I'm
> not alone.

Unicode causes many problems if not used properly. If you want to use Unicode
strings, use them everywhere in your Python application, decode input as early
as possible, and encode output only before writing it to a file or another
program.

Georg


From bignose+hates-spam at benfinney.id.au  Sat Nov 11 14:22:02 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 12 Nov 2006 06:22:02 +1100
Subject: handling many default values
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<mailman.2074.1163201795.11739.python-list@python.org>
	<yZj5h.119$tb2.36@trnddc08>
Message-ID: <87mz6xiyat.fsf@benfinney.id.au>

"Alan Isaac" <aisaac at american.edu> writes:

> There are *many* parameters, and the list can change, so I want to
> avoid listing them all in the Param class's __init__ function, using
> the strategy above.
>
> Q1: Is this approach reasonable?
>     (This is a newbie question about unforseen hazards.)
> Q2: Is it horrible design to isolate the parameters in a separate class?
>     (Comment: currently several classes may rely on (parts of) the same
> parameter set.)

It's a bad design smell to have functions that accept large numbers of
parameters, many of them optional. Such an interface is difficult to
document, maintain and test.

You should certainly be examining such code and seeing how much of it
can be implemented instead as functions with small, well-defined
parameter lists. This may mean writing more functions, or more layers
of functions, or more classes, or whatever; but having a result that
uses small, well-defined interfaces is a valuable property.

-- 
 \        "The number of UNIX installations has grown to 10, with more |
  `\     expected."  -- Unix Programmer's Manual, 2nd Ed., 12-Jun-1972 |
_o__)                                                                  |
Ben Finney



From orsenthil at gmail.com  Mon Nov 13 07:00:32 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 04:00:32 -0800
Subject: httplib.InvalidURL: nonnumeric port: For characters in the proxy
	password in URL
In-Reply-To: <mailman.40.1163409170.32031.python-list@python.org>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<mailman.40.1163409170.32031.python-list@python.org>
Message-ID: <1163419232.632721.192360@i42g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> Phoe6 wrote:
> > Hi,
> >      The following piece of code works properly when my proxy password
> > contains characters[a-zA-Z0-9] etc. But when my proxy password
> > contained something like '|\/|' , the httplib incorrectly indentified
> > it as separator.
>
> if you want to prevent the URI parser from treating something as part of
> the URI, you need to quote it:
>
>     pwd = urllib.quote(pwd, "")

Tried this and did not work out. It ended up confusing urllib and
urllib2 objects.
I dont want to import urllib, with the urllib2 itself wanted to work
around this piece of code.

<code>
proxy_user = r'senthil_or'
proxy_password='|\/|pr0c'
#proxy_password = r'|\/|pr0c'

# Setup the Proxy with urllib2

proxy_url = r'http://' + proxy_user + ':' + proxy_password + '@' +
PROXY_IP

proxy_support = urllib2.ProxyHandler({"http":proxy_url})
opener = urllib2.build_opener(proxy_support,urllib2.HTTPHandler)
urllib2.install_opener(opener)
</code>

Thanks,
Senthil



From gagsl-py at yahoo.com.ar  Tue Nov  7 01:50:44 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 03:50:44 -0300
Subject: using split function
In-Reply-To: <1162874295.593635.273260@i42g2000cwa.googlegroups.com>
References: <1162874036.351559.263280@i42g2000cwa.googlegroups.com>
	<1162874295.593635.273260@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107033952.04980410@yahoo.com.ar>


> > I have to write a code in python to read a matrix from a text file and
> > for that i am using following code. But it gives an error saying
> > "NameError: name 'split' is not defined". Can anyone help me with this.

A few hints:
- don't use "file" as a name - it shadows the builtin "file" type
- matrix.close() won't work, perhaps you meant file.close()?

> > -----------------------------------------------------
> > Also, i want to initialize the matrix A by zeros, but using A=zeros([4,
> > 4]) was giving a similar error "NameError: name 'zeros' is not
> > defined".

Oh, so *that's* why you build it using standard_normal and then 
overwrite the contents!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From mike.klaas at gmail.com  Sat Nov  4 19:38:07 2006
From: mike.klaas at gmail.com (Klaas)
Date: 4 Nov 2006 16:38:07 -0800
Subject: Defaultdict and speed
In-Reply-To: <1162629837.024248.94910@h54g2000cwb.googlegroups.com>
References: <1162542563.386682.3090@b28g2000cwb.googlegroups.com>
	<1162616241.354248.70220@f16g2000cwb.googlegroups.com>
	<1162629837.024248.94910@h54g2000cwb.googlegroups.com>
Message-ID: <1162687087.882739.198890@e3g2000cwe.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> Klaas wrote:
> > Benchmarks?
>
> There is one (fixed in a succesive post) in the original thread I was
> referring to:
> http://groups.google.com/group/it.comp.lang.python/browse_thread/thread/aff60c644969f9b/
> If you want I can give more of them (and a bit less silly, with strings
> too, etc).
<>

Sorry, I didn't see any numbers.  I ran it myself and found the
defaultdict version to be approximately twice as slow.  This, as you
suggest, is the worst case, as you are using integers as hash keys
(essentially no hashing cost) and are accessing each key exactly once.

>
> > (and slowing down other uses of the class)
>
> All it has to do is to cheek if the default_factory is an int, it's
> just an "if" done only once, so I don't think it slows down the other
> cases significantly.

Once it makes that check, surely it must check a flag or some such
every time it is about to invoke the key constructor function?

> > especially when the faster alternative is so easy to code.
>
> The faster alternative is easy to create, but the best faster
> alternative can't be coded, because if you code it in Python you need
> two hash accesses, while the defaultdict can require only one of them:
>
> if n in d:
>     d[n] += 1
> else:
>     d[n] = 1

How do you think that defaultdict is implemented?  It must perform the
dictionary access to determine that the value is missing.  It must then
go through the method dispatch machinery to look for the __missing__
method, and execute it.  If you _really_ want to make this fast, you
should write a custom distionary subclass which accepts an object (not
function) as default value, and assigns it directly.

> >If that performance difference matters,
>
> With Python it's usually difficult to tell if some performance
> difference matters. Probably in some programs it may matter, but in
> most other programs it doesn't matter. This is probably true for all
> the performance tweaks I may invent in the future too.

In general, I agree, but in this case it is quite clear.  The only
possible speed up is for defaultdict(int).  The re-write using regular
dicts is trivial, hence, for given piece of code is it quite clear
whether the performance gain is important.  This is not an
interpreter-wide change, after all.

Consider also that the performance gains would be relatively
unsubstantial when more complicated keys and a more realistic data
distribution is used.  Consider further that the __missing__ machinery
would still be called.  Would the resulting construct be faster than
the use of a vanilla dict?  I doubt it.

But you can prove me wrong by implementing it and benchmarking it.

> > you would likely find more fruitful
> > gains in coding it in c, using PyDict_SET
>
> I've just started creating a C lib for related purposes, I'd like to
> show it to you all on c.l.p, but first I have to find a place to put it
> on :-) (It's not easy to find a suitable place, it's a python + c +
> pyd, and it's mostly an exercise).

Would suggesting a webpage be too trite?

-Mike



From maxime_phan at hotmail.com  Mon Nov 20 11:15:47 2006
From: maxime_phan at hotmail.com (maxime_phan at hotmail.com)
Date: 20 Nov 2006 08:15:47 -0800
Subject: sending image pil 1.1.5 by network
Message-ID: <1164039347.784574.294770@h54g2000cwb.googlegroups.com>

Hello everyone, I'm trying to make a webcam software with python, pil
library and enet (networking)
Now I have in the client my pil image get from webcam, ready to be send
by network.

I do that:

self.peer.send(0, image.tostring(), enet.FLAG_RELIABLE)

and I have this error:
TypeError: argument 2 must be string without null bytes, not str

does someone know what kind of convertion I should do to make it work?

in tostring() function the default encoder is "raw", perhaps there is
one ok?
Thanks in advance



From wojciech_mula at poczta.null.onet.pl.invalid  Thu Nov  9 14:21:03 2006
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Thu, 9 Nov 2006 19:21:03 +0000 (UTC)
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
Message-ID: <slrnel6vs2.17k.wojciech_mula@cat.tac>

Nick Craig-Wood wrote:
>>  It's very mature, full-featured, and portable, and fairly easy to
>>  learn as well.
>
> ...with native look and feel on each platform unlike GTK / TK

AFAIK Tk 8 uses platform's native widgets.

w.


From salvatore.didio at wanadoo.fr  Thu Nov  2 14:10:16 2006
From: salvatore.didio at wanadoo.fr (Salvatore)
Date: 2 Nov 2006 11:10:16 -0800
Subject: Forum written in Python?
In-Reply-To: <eideui$9di$1@sage.ukr.net>
References: <Xns986FB78516025mosornet@161.53.160.64>
	<eideui$9di$1@sage.ukr.net>
Message-ID: <1162494616.220423.39070@m73g2000cwd.googlegroups.com>

Hello,

Look at Karrigell, it includes the base of a forum and a blog in is
demo
Karrigell is a wonderfull pythonic framework.
It's simple and efficient.
Thanks his author

Regards




slav0nic a ?crit :

> Karlo Lozovina ?????:
> > Are there any forum or bulletin board systems written entirely in Python?
> > I got sick of PhpBB, mostly because I can't tweak and fiddle with the
> > code, since I really don't like PHP and don't know it that well.
> >
> > I thought of writting my own simple forum software, but if there are
> > existing projects out there, I wouldn't mind contributing. So far I found
> > out about Pocoo, but it seems to immature right now, I was looking for
> > something comparable to PhpBB or IPB?
> >
> >
> Django-based:
> http://wiki.woodpecker.org.cn/moin/UliPad
> http://zyons.com
> 
> -----------
> http://python.com.ua



From sturlamolden at yahoo.no  Sat Nov 18 14:45:27 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Nov 2006 11:45:27 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163876220.121691.166740@h54g2000cwb.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163791069.178490.198740@j44g2000cwa.googlegroups.com>
	<1163876220.121691.166740@h54g2000cwb.googlegroups.com>
Message-ID: <1163879127.582231.268420@b28g2000cwb.googlegroups.com>


sturlamolden wrote:

> God grief. I followed the implementation in Ingrid Daubechies' and Wim
> Sweldens' original wavelet lifting paper  (J. Fourier Anal. Appl., 4:
> 247-269, 1998). If you look at the factorized polyphase matrix for D4
> (which gives the inverse transform), their implementation of the
> lifting steps the original paper is incorrect. That is scary.
>
> A free PDF or PS of the paper is available here:
>
> http://cm.bell-labs.com/who/wim/papers/factor/index.html


Actually its more complicated than that. The PS and the PDF files are
different, and only the PS-file is confused. Here is the correct
explanation:

The factorization of the polyphase matrix is not unique. There are
several valid factorizations. Our implementations corresponds to
different factorizations of the analysis and synthesis poyphase
matrices, and both are in a sence correct, although numerically
different.



From g.brandl-nospam at gmx.net  Tue Nov 21 11:09:09 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Tue, 21 Nov 2006 17:09:09 +0100
Subject: Software Compatable with other versions?
In-Reply-To: <mailman.534.1164111713.32031.python-list@python.org>
References: <mailman.534.1164111713.32031.python-list@python.org>
Message-ID: <ejv8b5$1df$1@news.albasani.net>

Michael Yanowitz schrieb:
> Hello:
> 
>   I am still using Python 2.4.3, I haven't upgraded yet.
> However, I would like to know if my 2.4.3 programs will run
> in 2.5 without modification.
>   Is there any way to test that my software is compatable
> with 2.5 (or any other version), without actually installing
> that version?:
> 
>   I have been told that the .pyc are not compatable. Is it
> possible, to convert a 2.4.x .pyc to a 2.5 .pyc?

No. Why should there if there's such an easy way to build it
from scratch?

Georg


From jaap at nospaml.com  Sun Nov  5 06:00:07 2006
From: jaap at nospaml.com (Jaap)
Date: Sun, 05 Nov 2006 12:00:07 +0100
Subject: tips requested for a log-processing script
Message-ID: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>

Python ers,
As a relatively new user of Python I would like to ask your advice on 
the following script I want to create.

I have a logfile which contains records. All records have the same 
layout, and are stored in a CSV-format. Each record is (non-uniquely) 
identified by a date and a itemID. Each itemID can occur 0 or more times 
per month. The item contains a figure/amount which I need to sum per 
month and per itemID. I have already managed to separate the individual 
parts of each logfile-record by using the csv-module from Python 2.5. 
very simple indeed.

Apart from this I have a configuration file, which contains the list of 
itemID's i need to focus on per month. Not all itemID's are relevant for 
each month, but for example only every second or third month. All 
records in the logfile with other itemID's can be ignored. I have yet to 
define the format of this configuration file, but am thinking about a 0 
or 1 for each month, and then the itemID, like:
"1 0 0 1 0 0 1 0 0 1 0 0 123456" for a itemID 123456 which only needs 
consideration at first month of each quarter.

My question to this forum is: which data structure would you propose? 
The logfile is not very big (about 200k max, average 200k) so I assume I 
can store in internal memory/list?

How would you propose I tackle the filtering of relevant/non-relevant 
items from logfile? Would you propose I use a filter(func, list) for 
this task or is another thing better?

In the end I want to mail the outcome of my process, but this seems 
straitforward from the documentation I have found, although I must 
connect to an external SMTP-server.

Any tips, views, advice is highly appreciated!


Jaap

PS: when I load the logfile in a spreadsheet I can create a pivot table 
which does about the same ;-] but that is not what I want; the 
processing must be automated in the end with a periodic script which 
e-mails the summary of the keyfigure every month.


From ptmcg at austin.rr._bogus_.com  Mon Nov  6 06:06:35 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 06 Nov 2006 11:06:35 GMT
Subject: string to list of numbers conversion
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <%GE3h.5945$lx6.583@tornado.texas.rr.com>

"jm.suresh at no.spam.gmail.com" <jm.suresh at gmail.com> wrote in message 
news:1162730071.953080.284980 at i42g2000cwa.googlegroups.com...
> Hi,
>  I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>  Is there any alternative way?
>
> Thanks.
> Suresh
>

Pyparsing comes with an example that parses strings representing lists. 
Here's that example, converted to parsing only tuples of numbers.  Note that 
this does not presume that tuples are only pairs, but can be any number of 
numeric values, nested to any depth, and with arbitrary whitespace, etc. 
This grammar also includes converters by type, so that ints come out as 
ints, and floats as floats.  (This grammar doesn't handle empty tuples, but 
it does handle tuples that include an extra ',' after the last tuple 
element.)

-- Paul
Download pyparsing at http://sourceforge.net/projects/pyparsing/ .


from pyparsing import *

integer = (Word(nums)|Word('-+',nums)).setName("integer")
real = Combine(integer + "." + Optional(Word(nums))).setName("real")
tupleStr = Forward().setName("tuple")
tupleItem = real | integer | tupleStr
tupleStr << ( Suppress("(") + delimitedList(tupleItem) +
                       Optional(Suppress(",")) + Suppress(")") )

# add parse actions to do conversion during parsing
integer.setParseAction( lambda toks: int(toks[0]) )
real.setParseAction( lambda toks: float(toks[0]) )
tupleStr.setParseAction( lambda toks: tuple(toks) )

s = '((1,2), (3,4), (-5,9.2),)'
print tupleStr.parseString(s)[0]

Gives:
((1, 2), (3, 4), (-5, 9.1999999999999993))




From bdesth.quelquechose at free.quelquepart.fr  Wed Nov  8 17:51:17 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 08 Nov 2006 23:51:17 +0100
Subject: is this the right way to do subclasses?
In-Reply-To: <45522074$0$17101$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
Message-ID: <45525a98$0$32029$426a34cc@news.free.fr>

John Salerno a ?crit :
> Ok, back to my so-called "game." I'm just curious if I've implemented 
> the subclasses properly, because it seems like an awful lot of 
> repetition with the parameters. And again, if I want to add a new 
> attribute later, I'd have to change a lot of things. I can't help but 
> get the feeling that I'm doing something very inefficiently.
> 
> Thanks!
> 
> 
> 
> class Character(object):
> 
>     def __init__(self, name, strength, dexterity, intelligence):
>         self.name = name
>         self.health = 10
>         self.strength = strength
>         self.dexterity = dexterity
>         self.intelligence = intelligence
> 
> 
> class Fighter(Character):
> 
>     def __init__(self, name, strength, dexterity, intelligence):
>         Character.__init__(self, name, strength, dexterity, intelligence)
>         self.health += 2
>         self.strength += 1
> 
> 
> class Thief(Character):
> 
>     def __init__(self, name, strength, dexterity, intelligence):
>         Character.__init__(self, name, strength, dexterity, intelligence)
>         self.health += 1
>         self.dexterity += 1
> 
> 
> class Mage(Character):
> 
>     def __init__(self, name, strength, dexterity, intelligence):
>         Character.__init__(self, name, strength, dexterity, intelligence)
>         self.intelligence += 1

This is correct, and a good first start. Now there's effectively some 
boilerplate that we could get rid of using the template method pattern:

class Character(object):
     def __init__(self, name, strength, dexterity, intelligence):
         self.name = name
         self.health = 10
         self.strength = strength
         self.dexterity = dexterity
         self.intelligence = intelligence
	self._post_init()

     def _post_init(self):
         pass

class Fighter(Character):
     def _post_init(self):
         self.health += 2
         self.strength += 1


class Thief(Character):
     def _post_init(self):
         self.health += 1
         self.dexterity += 1


class Mage(Character):
     def _post_init(self):
         self.intelligence += 1

HTH


From gagsl-py at yahoo.com.ar  Fri Nov 10 17:18:10 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 19:18:10 -0300
Subject: service windows avec py2exe
In-Reply-To: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
References: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061110191059.00fd09d0@yahoo.com.ar>

At Friday 10/11/2006 08:15, DarkPearl wrote:

>apres avoir cr?er un service windows avec py2exe,
>j'ai ce probleme quand je lance le service :
>
>voici ce que je trouve dans le journal d'evenement :
>
>The instance's SvcRun() method failed
><Error getting traceback - traceback.print_tb() failed
><class 'pywintypes.com_error'>: (-2147221020, 'Syntaxe incorrecte',
>None, None)

Try with a small sample application then adding 
more functions, to see where it fails.
(Pardonnez moi, je ne sais pas assez pour r?pondre en fran?aise)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Wed Nov  1 04:42:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 10:42:56 +0100
Subject: High level csv reader
In-Reply-To: <tSZ1h.1212$m54.534@newssvr14.news.prodigy.com>
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
	<tSZ1h.1212$m54.534@newssvr14.news.prodigy.com>
Message-ID: <ei9q74$n7q$1@sea.gmane.org>

James Stroud wrote:

>> Before I go on and reinvent the wheel, is there a generic high level
>> wrapper around csv.reader that does all this ?
 >
> There is a csv in the standard library.

I'm not sure the "csv" module qualifies as a high-level wrapper around 
itself, though.

</F>



From thunderfoot at gmail.com  Thu Nov 30 13:21:51 2006
From: thunderfoot at gmail.com (thunderfoot at gmail.com)
Date: 30 Nov 2006 10:21:51 -0800
Subject: Automatic increment
In-Reply-To: <mailman.887.1164910099.32031.python-list@python.org>
References: <mailman.887.1164910099.32031.python-list@python.org>
Message-ID: <1164910911.554681.158220@h54g2000cwb.googlegroups.com>


Gheorghe Postelnicu wrote:
> Hi,
>
> I have a situation of the following type:
>
> for line in lineList:
>     for item in line.split()
>         myArray[counter, itemCounter]
>         itemCounter = itemCounter + 1
>     counter = counter +1
>
> Is there a way to get rid of the manual incrementation of the 2 counters?
>

for counter, line in enumerate(lineList):
    for itemCounter, item in enumerate(line.split()):
        myArray[counter, itemCounter]

hth,
Don



From mail at microcorp.co.za  Mon Nov 20 09:57:34 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 16:57:34 +0200
Subject: rpncalc-2.5 RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com><mailman.491.1164004338.32031.python-list@python.org><1164009539.310173.248620@m7g2000cwm.googlegroups.com><1164010575.812704.120600@f16g2000cwb.googlegroups.com>
	<1164021728.545537.170920@m7g2000cwm.googlegroups.com>
Message-ID: <000301c70d24$b24fb3a0$03000080@hendrik>

"Rob Wolfe" <rw at smsnet.pl> wrote:
> 
> Ant wrote:
> > > name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
> >
> > Lukershavik IIRC. At least that's how I was told it was pronounced (I
> > had to say the damn name many times in presentations whilst using his
> > algebras to model three-valued logic. Don't know if there were many
> > Poles there to criticise mind ;-) )
> 
> I wasn't there but you certainly deserved the criticism. ;-)
> "Lukershavik" sounds horrible. I'm Polish so I know what I'm saying.
> But don't worry, I know it's difficult. :)
> Closer would be I think:
> 
> Woo  as in wood
> cu     as in cup
> sh    as in ship
> e      as in bed
> vi       as in victim
> tch    as in catch
> 
> Woocushevitch

Thanks - Hendrik




From nospam at domain.tld  Thu Nov 16 04:54:36 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 16 Nov 2006 10:54:36 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
Message-ID: <ejhcgt$11j$1@kohl.informatik.uni-bremen.de>

Fredrik Tolf wrote:

> If this doesn't work, might there be some other way to run untrusted
> code that I haven't thought of (apart from using O/S-specific stuff like
> SECCOMD, of course).

There was a module called rexec which tries to give you a restricted
environment for executing code. But it seems, that it is not maintained
anymore, because there were too much problems with it. It seems, that it is
very complicated to get a restricted execution environment without losing
too much of Pythons functionality. 

One question is, what you want to achieve. As another posting in this thread
mentioned, you can't get around of denial of service attacks, even in
restricted or trusted environments. So I assume, that what you want is
something like a sandbox, where specific file actions (deleting files,
access to specific part of the FS at all) and some other things can be
restricted or forbidden. I think, this should be possible, even for some
DOS-Attacks (e.g. restricting the amount of memory that can be used by the
script, or the max stack size, depth of recursion limits etc.), but it is a
hard job to find all places, where code can break out of your sandbox. For
a full load of bad examples, simply have a look at JavaScript... 

For a IMHO really good implementation of the sandbox idea, have a look at
the "safe interp" in Tcl. A short description (and by no mean complete) of
the safe interp is to run a second and completely independent interpreter
with all possibly dangerous commands completely removed and a
one-way-channel to inject commands and scripts into its evaluation loop
from the trusted interpreter. Depending on how much faith you have into the
untrusted script, you can selectively allow additional commands in the safe
interp or map common commands to other restricted or monitored versions of
them, which you implemented yourself inside your trusted environment. I do
not know, how complex it would be to do this in Python (since Tcl may look
a little old fashioned to some people but has some unique features that
helps especially with this kind of problem, such as having no keywords,
which makes it possible to change the semantics of even the most basic
constructs in the language from the scripting level), but I think it would
be a really useful feature for Python to have a sandbox mechanism to run
untrusted code.

Regards
Stephan 


From klaus at seistrup.dk  Wed Nov  1 00:08:13 2006
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Wed, 1 Nov 2006 05:08:13 +0000 (UTC)
Subject: Unescape HTML entities
References: <mailman.1412.1162068610.11739.python-list@python.org>
	<ei0inl$et9$1@minji.szn.dk>
	<mailman.1580.1162356379.11739.python-list@python.org>
Message-ID: <ei9a3t$3ql$1@minji.szn.dk>

Rares Vernica wrote:

> How does your code deal with &#039; like entities?

It doesn't, it deals with named entities only.  But take a look 
at Fredrik's example.

Cheers, 

-- 
Klaus Alexander Seistrup
K?benhavn, Danmark, EU
http://klaus.seistrup.dk/


From kai.kuehne at gmail.com  Sat Nov 18 17:06:32 2006
From: kai.kuehne at gmail.com (Kai Kuehne)
Date: Sat, 18 Nov 2006 23:06:32 +0100
Subject: Overwrite only one function with property()
Message-ID: <fd5005b00611181406i1e562858q3058ee1c6ce58d88@mail.gmail.com>

Hi list!
It is possible to overwrite only one function with the property-function?

x = property(getx, setx, delx, 'doc')

I just want to overwrite setx, but when I set the others to None,
I can't read and del the member. Any ideas or is this not possible?

Thank you!
Kai


From fredrik at pythonware.com  Thu Nov 23 10:47:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 16:47:00 +0100
Subject: select() on WinXP
References: <1164296300.268074.250230@j44g2000cwa.googlegroups.com>
Message-ID: <ek4fpk$2b2$1@sea.gmane.org>

grebekel at gmail.com wrote:

> I'm running Python 2.5 on Windows XP. When I try to do this:
>
> [code]
> import select
> select.select([], [], [])
> [/code]
>
> I get this:
>
> [output]
> Traceback (most recent call last):
>  File "C:/Documents and Settings/Grebekel/Desktop/s.py", line 2, in
> <module>
>    select.select([],[],[])
> error: (10022, 'An invalid argument was supplied')
> [/output]
>
> Is there anything I should be aware of to get select() working under
> Windows?

like, say, only calling select if you actually have something you want to select on?

(if you want to sleep, use time.sleep())

</F> 





From no-spam at no-spam-no-spam.invalid  Sat Nov  4 07:20:23 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 04 Nov 2006 13:20:23 +0100
Subject: py2exe questions
In-Reply-To: <mailman.1742.1162594159.11739.python-list@python.org>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>	<454BB574.9030607@websafe.com>
	<mailman.1742.1162594159.11739.python-list@python.org>
Message-ID: <eii0i8$82i$1@news.albasani.net>

Thomas Heller wrote:
> Larry Bates schrieb:
>> Doug Stell wrote:
>>> I have 2 questions about py2exe or any similar utility.
>>>
>>> 1. Is it possible to create a single Windows executable that does not
>>> blow out to a folder full of files and can be called from scripts
>>> using command line arguments?
>>>
>>> 2. If the above can be done, it is possible to hide parts of the
>>> Python source code from users? These users are software developers,
>>> but we don't want them to see how the code does what it does.
>>>
>>> thanks, doug
>> py2exe reduce the number of files you need to distribute down to 4:
>>
>> msvcr71.dll
>> w9xpopen.exe  (Windows/98 support)
>> library.zip (all .pyo, .pyd, and .dll files)
>> applcation.exe
> 
> It can easily be reduced to 2 files by 'embedding' the libray.zip
> into the exe (use the zipfile=None option), and deleting the w9xpopen.exe
> if you don't need win98 support.

and finally you can use Python2.3 to avoid msvcr71.dll

-robert


From antroy at gmail.com  Thu Nov  2 10:52:40 2006
From: antroy at gmail.com (Ant)
Date: 2 Nov 2006 07:52:40 -0800
Subject: creating new objects with references to them
In-Reply-To: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
Message-ID: <1162482760.424782.244760@h48g2000cwc.googlegroups.com>



On Nov 2, 3:15 pm, "JohnJSal" <johnj... at gmail.com> wrote:
> It seems like what I want to do is something that programmers deal with
> everyday, but I just can't think of a way to do it. Basically, I am
> writing a DB front-end and I want a new "Researcher" object to be
> created whenever the user presses the "New Record" button. He can open
> as many new records at a time as he wants and fill in the information.
>
> What I don't know how to do is handle this arbitrary number of objects.
> When it comes time to save the data to the DB, how do I access each
> object (to get the text fields associated with each)? Won't I have to
> have given each instance some name?

It all depends on what UI you are using (Web frontend? GUI such as
Tkinter?) and what your use case is.

What is it exactly that you want to do? Create a bunch of Researcher
objects and then save them in a single hit? Create a list of
Researchers and then choose which to save to the db? Populate a list of
researchers from the db, and have the option of editing or adding new
ones? Should the new Researcher objects be committed to the db as soon
as they are saved?

Anyway, a simple list of Researchers should suffice for any of these
purposes, and assuming you want to commit them all in one hit, you have
a list of objects ready to iterate over.



From 120psi at gmail.com  Fri Nov 24 11:12:08 2006
From: 120psi at gmail.com (120psi at gmail.com)
Date: 24 Nov 2006 08:12:08 -0800
Subject: synching with os.walk()
References: <mailman.679.1164383825.32031.python-list@python.org>
Message-ID: <1164384728.336225.59840@l39g2000cwd.googlegroups.com>

> os.walk() is a nice generator for performing actions on all files in a
> directory and subdirectories. However, how can one use os.walk() for walking
> through two hierarchies at once? I want to synchronise two directories (just
> backup for now), but cannot see how I can traverse a second one. I do this
> now with os.listdir() recursively, which works fine, but I am afraid that
> recursion can become inefficient for large hierarchies.

I've run into wanting to work with parallel directory structures
before, and what I generally do is something like:

for root, dirs, files in os.walk( dir1 ):
  dir2_root = dir2 + root[len(dir1):]
  for f in files:
    dir1_path = os.path.join( root, f )
    dir2_path = os.path.join( dir2_root, f )

Does this work for your needs?
-- Nils



From sjmachin at lexicon.net  Thu Nov  9 02:49:23 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Nov 2006 23:49:23 -0800
Subject: which is a good imaging lib in python??
In-Reply-To: <1163057897.010765.46780@h48g2000cwc.googlegroups.com>
References: <1163057897.010765.46780@h48g2000cwc.googlegroups.com>
Message-ID: <1163058562.951043.167910@i42g2000cwa.googlegroups.com>


srj wrote:
> hi
> can any1 tell me which is a good imaging lib in python and where i can
> get it (2 dwnld) from??
>
> regds

The straight answer to your question is "Yes".

If you were to do a google search for "python imaging library", you
would then be in a position to tell yourself.



From mnations at gmail.com  Sat Nov  4 11:23:40 2006
From: mnations at gmail.com (Mudcat)
Date: 4 Nov 2006 08:23:40 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <453E3370.9060008@kevin-walzer.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
Message-ID: <1162657420.655675.185930@e3g2000cwe.googlegroups.com>

I have been using Tkinter for several years now. Recently I have been
thinking about switching to something else that may have a sharper
appearance. However I'm not sure what that may be, and if that
something else is *that* much better than what I'm already using.

Does everyone agree that wxPython looks best on Windows? I've also read
in a couple of places where Dabo looks pretty good as well.

So if someone were to pick a UI that gave the best appearance, what
would they choose?



Kevin Walzer wrote:
> jiang.haiyun at gmail.com wrote:
> > Now i began to learn GUI programming. There are so many
> > choices of GUI in the python world, wxPython, pyGTK, PyQT,
> > Tkinter, .etc, it's difficult for a novice to decide, however.
> > Can you draw a comparison among them on easy coding, pythonish design,
> > beautiful and generous looking, powerful development toolkit, and
> > sufficient documentation, .etc.
> > It's helpful for a GUI beginner.
> > Thank you.
> >
> >
> > :)Sorry for my poor english.
> >
>
> Tkinter:
> Pro: Default GUI library for Python; stable; well-supported
> Con: Needs extension for complex/rich GUI's; core widgets are dated in
> look and feel; many modern extensions in Tcl/Tk have not made it into
> Tkinter or are not widely used (Tile, Tablelist)
>
> wxPython:
> Pro: Popular, actively developed, wraps native widgets, looks great on
> Windows, commercial-friendly license
> Con: Based on C++ toolkit; docs assume knowledge of C++; some think
> coding style is too much like C++; complex to build and deploy on Linux
>  (wraps Gtk)
>
> PyQt:
> Pro: Powerful, cross-platform, sophisticated GUI's
> Con: Based on C++ toolkit; docs assume knowledge of C++; commercial
> deployment is expensive; free deployment must be GPL; smaller
> development and user community than wxPython
>
> PyGtk:
> Pro: Sophisticated GUI's, cross-platform (Linux and Win32); very popular
> on some platforms; active development community
> Con: Not native on OS X
>
>
>
> 
> 
> -- 
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com



From acatejr at gmail.com  Fri Nov  3 18:30:14 2006
From: acatejr at gmail.com (acatejr at gmail.com)
Date: 3 Nov 2006 15:30:14 -0800
Subject: Python Classes and dynamic class members
Message-ID: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>

I have a text file that I am parsing.  Each line is of the form:

max_time  0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12

The first item is the field name and the next twelve items are values
for each month in the year.  There are multiple lines each for some
different variable.  I am able to parse this data easily enough, but
what I'd like to do is have a class that stores all this infomormation
using dynamic member attributes/fields and the resulting list of
values.  For example, if the class WeatherData was instantiated and I
parsed the line above as so:

field_name = "max_time;
values = [0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]

how could I get weather data to store values in an attribute called
"max_time"?  Ultimately, something like this would be possible:

>>>WeatherData.max_time
>>>[0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]

Any help would be appreciated.



From fredrik at pythonware.com  Tue Nov 14 06:10:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:10:35 +0100
Subject: PyFAQ: help wanted with thread article
Message-ID: <ejc87d$ptr$1@sea.gmane.org>

this FAQ item talks about using sleep to make sure that threads run
properly:

http://effbot.org/pyfaq/none-of-my-threads-seem-to-run-why.htm

I suspect it was originally written for the "thread" module, but as
far as I know, the "threading" module takes care of the issues described 
here all by itself.

so, should this item be removed?

or can anyone suggest a rewrite that's more relevant for "threading" 
users.  feel free to post suggestions (or better, an updated text) to 
this thread, or over at the PyFAQ staging site.

</F>



From johnjsal at NOSPAMgmail.com  Mon Nov  6 16:56:41 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 06 Nov 2006 16:56:41 -0500
Subject: sqlite error?
In-Reply-To: <1162849478.092439.297160@i42g2000cwa.googlegroups.com>
References: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
	<1162849478.092439.297160@i42g2000cwa.googlegroups.com>
Message-ID: <454faf0a$0$12993$c3e8da3@news.astraweb.com>

thunderfoot at gmail.com wrote:
> John Salerno wrote:
>> Am I using the ? placeholder wrong in this example?
>>
>>
>> t = ('hi', 'bye')
>>
>> self.connection.execute("INSERT INTO Personal (firstName, lastName)
>> VALUES ?", t)
>>
>>
>>
>> Traceback (most recent call last):
>>    File "C:\Python25\myscripts\labdb\dbapp.py", line 93, in OnSaveRecord
>>      self.save_to_database(textfield_values)
>>    File "C:\Python25\myscripts\labdb\dbapp.py", line 97, in save_to_database
>>      self.connection.execute("INSERT INTO Personal (firstName, lastName)
>> VALUES ?", t)
>> sqlite3.OperationalError: near "?": syntax error
> 
> I believe you're missing the parens around your VALUES to insert. Also,
> you need 1 placeholder per argument inserted, not just one for the
> entire argument list. Try:
> 
> self.connection.execute("INSERT INTO Personal (firstName, lastName)
> VALUES (?, ?)", t)
> 
> HTH
> 

Thanks guys. I'll try this. I thought the ? stood for the whole tuple.


From ynaddaf at riptown.com  Tue Nov  7 17:16:53 2006
From: ynaddaf at riptown.com (deLenn)
Date: 7 Nov 2006 14:16:53 -0800
Subject: Finding Nonzero Elements in a Sparse Matrix
Message-ID: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>

Hi,

Does scipy have an equivalent to Matlab's 'find' function, to list the
indices of all nonzero elements in a sparse matrix?

Cheers.



From st911 at rock.com  Thu Nov 30 19:49:12 2006
From: st911 at rock.com (st911 at rock.com)
Date: 30 Nov 2006 16:49:12 -0800
Subject: *** 911 WAS AN INSIDE JOB. YOU WILL GET ALL SCIENTIFIC EVIDENCE ON
	st911.org ***
Message-ID: <1164934152.400086.196120@n67g2000cwd.googlegroups.com>

911 WAS AN INSIDE JOB. YOU WILL GET ALL SCIENTIFIC EVIDENCE ON
st911.org


The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

He and his family later sued the U.S. government for damages.

"We lived in 1984," Mayfield told reporters Wednesday. "I'm talking
about the George Orwell, frightening brave new world in which Big
Brother is constantly watching you." (Watch Mayfield discuss the case
Video)

"I, myself, have dark memories of stifling paranoia, of being
monitored, followed, watched, tracked," he said, choking back emotion.

"I've been surveilled, followed, targeted primarily because I've been
an outspoken critic of this administration and doing my job to defend
others who can't defend themselves, to give them their day in court,
and mostly for being a Muslim."

The government refused, he said, to tell him where they put their
cameras and surveillance devices, leaving his family wondering if their
private conversations and intimate moments were on display.

"The days and weeks and months following my arrest were some of the
hardest and darkest that myself and my family have ever had to endure,"
he said.

"And all because of this government's ill-conceived war on terror. ...
What I really want is for this not to happen to anyone else."

Wednesday's settlement includes not only a $2 million payment and an
apology, but also an agreement by the government to destroy
communications intercepts conducted by the FBI against Mayfield's home
and office during the investigation.

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

A Justice Department statement released Wednesday said Mayfield was not
targeted because of his Muslim faith and that the FBI had taken steps
to improve its fingerprint identification process "to ensure that what
happened to Mr. Mayfield does not happen again."

"Mr. Mayfield and his family felt it was in their best interest to get
on with their lives," said Mayfield's attorney, Elden Rosenthal.

"No amount of money can compensate Mr. Mayfield for being held as a
prisoner and being told he faced the death penalty [for the Madrid
bombings]."

Mayfield said his suit was not about money.

"It's about regaining our civil rights, our freedom and most important,
our privacy," he said.

He and his attorneys said the settlement will allow him to continue the
portion of his lawsuit challenging the constitutionality of the Patriot
Act.

Mayfield contends that his home was searched under provisions of the
Patriot Act.

====================================================================

Criminal, Rogue and RACIST elements have penetrated all the branches of
USA and world governments. We know that on 911 FBI bastards ran all
over in the neighborhood of Pentagon trying to  confiscate EVIDENCE of
the 911 crime that no Boeing Passenger Airliner hit Pentagon. They have
stil not released the evidence. 911 was inside job.

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, Mossad, PENTAGON AND THE WHITE HOUSE. Dont
forget that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, PENTAGON AND THE WHITE HOUSE. Dont forget
that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

THE ONLY ONLY REASON FBI DID THIS IS BECAUSE THEIR CRIME WAS
UNCONCEALABLE. UNDER THE PRETEXT OF SELF-DEFENSE, MANY OF THESE AGENCY
OFFICIALS HAVE COVERED THEIR CRIMES AND DESTROYED EVIDENCE OF THEIR
CRIMES.

FBI COVERED UP A CHILD PEDOPHILIA RING THAT WAS LINED TO REAGAN AND
HERBERT WALKER BUSH. There is a VIDEO on google of the investigation.


===========================

www.nkusa.org
Name:

www.nkusa.org

Nickname:

www.st911.org

Location:

WTC Building 7

Title:

Pentagon Videos

Industry:

Non-Profit

Email address:

s... at rock.com
Website or Blog:

www.infowars.com www.prisonplanet.org www.counterpunch.org

Quote:

On 911, the only buildings that were demolished were the ones that
belonged to Larry Silverstein. Building 7 Committed suicide even though
no plane had hit it. Within minutes, FBI bastards were running around
confiscating the pentagon videos to coverup the fact that there was no
plane that hit the pentagon. Every bastard in the plot spoke in passive
language: Rudy Guiliani said ... we were told ... WHO TOLD YOU!!! The
physics shows that the building were demolished by synchronized
explosions. Residue of Thermate = Thermite + Sulfur have been found in
the molten metal pools. The time of fall is equal to free fall,
debunking the pancake theory. Uncontrolled burning of Jet fuel does not
create molten metal pools. View the videos with your own eyeballs. On
the next day the uncivilized mad dogs of europe stood up and barked
that an attack on one country is on all of them, becoming infact the
most effective enablers of the actual criminals of 911. Instead of a
dispassionate investigation they barked for war. This led to invasion
of Afghanistan, the false cooked evidence of WMDs on Iraq. The use of
white phosphorus, war crime. The naked human towers. The mad dogs of
europe in the govt are all quiet on this. Only humane civilians of
europe are vocal and making their efforts at individual levels.



From fredrik at pythonware.com  Tue Nov 28 02:22:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 08:22:54 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <Xns9888CD96B985AOKB@199.45.49.11>
References: <200611261804.54669.mgiann@beta-cae.gr>	<200611271133.48359.mgiann@beta-cae.gr>	<ekecd9$e8c$1@sea.gmane.org>	<mailman.768.1164637881.32031.python-list@python.org>	<Xns988896361B9C5duncanbooth@127.0.0.1>	<Xns9888724C01B78OKB@199.45.49.11>	<mailman.779.1164656450.32031.python-list@python.org>
	<Xns9888CD96B985AOKB@199.45.49.11>
Message-ID: <ekgo4f$nep$1@sea.gmane.org>

OKB (not okblacke) wrote:

 > Why doesn't it?

because whoever wrote the class didn't do things that way, mostly for 
efficiency reasons.  there's nothing in Python that keeps you from using 
template methods if you want, but that's a costly approach, so it's not 
very common.

I suggest reading up on OO design patterns.

</F>



From vatamane at gmail.com  Sun Nov  5 03:42:23 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 5 Nov 2006 00:42:23 -0800
Subject: NEWBIE: Script help needed
References: <lorenzo-A4D904.14582904112006@hedley.internal.thethurmans.com>
Message-ID: <1162716143.747535.109270@h48g2000cwc.googlegroups.com>

If the other commands work but 3) doesn't, it means there is something
different (wrong?) with the command.

So try running 3) ,  then one of the other ones and see the difference.


The getCommandOutput() , I suspect,  just waits for the data from the
actual command and the command is not returning anything. It could be
because it just takes way too long (I am not familiar with Gentoo, so
not sure if emerge world takes 1 second or 24 hours...) or perhaps the
"emerge -uvp world" stops at some point and is waiting for input (a
command prompt like "are you sure you want to do this [Y/n]?"

For more in depth on subprocesses in Python take a look at the
subprocess module:
http://docs.python.org/lib/module-subprocess.html

Hope this helps,
Nick V.



Lorenzo wrote:
> I have this script that I want to use weekly to send me email with
> information regarding disk space and available upgrades for my system.
> This script is actually a learning tool for me as I learn Python. The
> problem I've run into has me stumped and I need some help. What happens
> is when the script runs it does these things, parses the result and
> appends that to an html string:
>
> 1) checks disk space by using df -t reiserfs
> 2) runs time emerge --sync
> 3) runs emerge -uvp world
> 4) runs emerge -uv --fetchonly world
>
> The 'emerge' command is a Gentoo specific one. If I remove step 3),
> everything else runs just fine, the email is sent and I receive what I
> expect. But when step 3) is allowed to run, even if its the only command
> that runs, it hangs somewhere in the function getCommandOutput. If I try
> and debug the command, it appears to hang on this line:
> err = child.wait()
>
> I suspect a race condition, but I'm not sure how to proceed, can someone
> lend me a hand. Here is the script I wrote, I got the command
> getCommandOutput from this site:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52296
> TIA
>
> [code]
> #!/usr/bin/python
>
> ################################
> ### NEED TO RUN THIS AS ROOT ###
> ### EMERGE SYNC REQUIRES THIS ###
> ################################
> import os, re, smtplib, MimeWriter, mimetools, cStringIO, popen2, fcntl,
> select, pdb
>
> cmd = 'df -t reiserfs'
> finalList = []
> theOutput = []
>
> text = "This realy should be in HTML"
>
>
> html = "<html>\
> <head>\
> <meta http-equiv=\"Content-Type\" content=\"text/html;
> charset=iso-8859-1\">\
> </head>\
> <BODY><BR><font color='green'><em>Disk Utilization on
> Hedley:</em></font><BR>"
>
> out = cStringIO.StringIO()
> writer = MimeWriter.MimeWriter(out)
> txtin = cStringIO.StringIO(text)
>
>
> def createhtmlmail (html, text, subject):
>          """Create a mime-message that will render HTML in popular
>       MUAs, text in better ones"""
>    import MimeWriter
>    import mimetools
>    import cStringIO
>
>    out = cStringIO.StringIO() # output buffer for our message
>    htmlin = cStringIO.StringIO(html)
>    txtin = cStringIO.StringIO(text)
>
>    writer = MimeWriter.MimeWriter(out)
>    #
>    # set up some basic headers... we put subject here
>    # because smtplib.sendmail expects it to be in the
>    # message body
>    #
>    writer.addheader("Subject", subject)
>    writer.addheader("MIME-Version", "1.0")
>
>    writer.addheader("From", "Hedley at myserver.com")
>       writer.addheader("To", "lorenzo at myserver.com")
>    #
>    # start the multipart section of the message
>    # multipart/alternative seems to work better
>    # on some MUAs than multipart/mixed
>    #
>    writer.startmultipartbody("alternative")
>    writer.flushheaders()
>    #
>    # the plain text section
>    #
>    subpart = writer.nextpart()
>    subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
>    pout = subpart.startbody("text/plain", [("charset", 'us-ascii')])
>    mimetools.encode(txtin, pout, 'quoted-printable')
>    txtin.close()
>    #
>    # start the html subpart of the message
>    #
>    subpart = writer.nextpart()
>    subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
>    #
>    # returns us a file-ish object we can write to
>    #
>    pout = subpart.startbody("text/html", [("charset", 'us-ascii')])
>    mimetools.encode(htmlin, pout, 'quoted-printable')
>    htmlin.close()
>    #
>    # Now that we're done, close our writer and
>    # return the message body
>    #
>    writer.lastpart()
>    msg = out.getvalue()
>    out.close()
>    print msg
>    return msg
>
> def makeNonBlocking(fd):
>     fl = fcntl.fcntl(fd, fcntl.F_GETFL)
>     try:
>    fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NDELAY)
>     except AttributeError:
>    fcntl.fcntl(fd, fcntl.F_SETFL, fl | fcntl.FNDELAY)
>
>
> def getCommandOutput(command):
>     theOutput = []
>     child = popen2.Popen3(command, 1) # capture stdout and stderr from
> command
>     child.tochild.close()             # don't need to talk to child
>     outfile = child.fromchild
>     outfd = outfile.fileno()
>     errfile = child.childerr
>     errfd = errfile.fileno()
>     makeNonBlocking(outfd)            # don't deadlock!
>     makeNonBlocking(errfd)
>     outdata = errdata = ''
>     outeof = erreof = 0
>     while 1:
>    ready = select.select([outfd,errfd],[],[]) # wait for input
>    if outfd in ready[0]:
>        outchunk = outfile.read()
>        if outchunk == '': outeof = 1
>        outdata = outdata + outchunk
>    if errfd in ready[0]:
>        errchunk = errfile.read()
>        if errchunk == '': erreof = 1
>        errdata = errdata + errchunk
>    if outeof and erreof: break
>    select.select([],[],[],.1) # give a little time for buffers to fill
>    err = child.wait()
>     if err != 0:
>    raise RuntimeError, '%s failed w/ exit code %d\n%s' % (command, err,
> errdata)
>     theOutput.append(outdata)
>     theOutput.append(errdata)
>     return theOutput
>
>
> #Run df and get the disk info
> output =  os.popen(cmd)
>
> # match two or more spaces, the header line has a sngle
> # space between the 'Mouted on' field
> # We need to keep those together
> # The other spaces are the separation in the field headers
> # To get the output from df down to just the field headers
> # and the data, we need to match 2 or more spaces
> # -1 eliminates the \n at the end of output.
> # We'll get it back when we write each line to the
> # mail message, I suspect
>
> html += "<font color='blue'>"
>
> for lines in output.readlines():
>
>    p = re.compile('\ +')
>    formattedText = p.subn('      ', lines[:-1], 5)
>    html += formattedText[0] + '<BR>'
>
> html += "</font>"
>
> mydata = getCommandOutput("time emerge --sync")
>
>
> p = re.compile('\ +')
> p.subn(' ', mydata[1])[0]
> p = re.compile('\n')
> string = (p.subn('<BR>', mydata[1]))[0]
>
> html += "<BR><BR><em><font color='green'>Sync Time: " + "<BR>" +
> "</font></em>" + "<font color='blue'>" + string + "</font>"
>
>
> mydata = ""
> mydata =  getCommandOutput("emerge -uvp world")
>
> p = re.compile('\ +')
> (p.subn(' ', mydata[0]))[0]
> p = re.compile('\n')
> html += "<font color='blue'>" + (p.subn('<BR>', mydata[0]))[0] +
> "</font>"
>
>
>
> try:
>    getCommandOutput('emerge -uv --fetchonly world')
>    html += "<font color='Green'><em><BR>Fetch completed
> successfuly!</em></font>"
> except RuntimeError:
>       html += "< font color='Red'><BR>******Fetch did not complete
> successfully!*********</font>"
>
> html+= '</BODY> </HTML>'
>
> out = cStringIO.StringIO()
> writer = MimeWriter.MimeWriter(out)
> txtin = cStringIO.StringIO("This should be in HTML")
> subject = "Emerge info and disk utilization on Hedley"
> message = createhtmlmail(html, text, subject)
> server = smtplib.SMTP("hedley")
> server.sendmail('Hedley at myserver.com', 'lorenzo at myserver.com', message)
> server.quit()
> [/code]
>
> --
> "My Break-Dancing days are over, but there's always the Funky Chicken"
> --The Full Monty



From sjmachin at lexicon.net  Thu Nov 30 13:33:36 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 10:33:36 -0800
Subject: extremely slow array indexing?
References: <1164907021.765969.129280@80g2000cwy.googlegroups.com>
	<1164908923.363433.43770@l39g2000cwd.googlegroups.com>
Message-ID: <1164911616.009985.210320@h54g2000cwb.googlegroups.com>

Will McGugan wrote:
> Grace Fang wrote:
>
> > Hi,
> >
> > I am writing code to sort the columns according to the sum of each
> > column. The dataset is huge (50k rows x 300k cols), so i need to read
> > line by line and do the summation to avoid the out-of-memory problem.
> > But I don't know why it runs very slow, and part of the code is as
> > follows. I suspect it's because of array index, but not sure. Can
> > anyone
> > point out what needs to be modified to make it run fast? thanks in
> > advance!
>
> Array indexing is unlikely to be the culprit. Could it not just be
> slow, because you are processing a lot of data? With numbers those big
> I would expect to have enough time to go make a coffee, then drink it.
>
> If you think it is slower than it could be, post more code for
> optimization advice...
>
> Will McGugan

Hi Grace,
What Will McGugan said, plus:
1. Post *much* more of your code e.g. all relevant parts :-)
2. Explain  "featureDict" and "componentdict1"; note that you seem to
be doing more dictionary accessing than array indexing.
3. Tell us what is "row" (not mentioned elsewhere) in the last line of
your code snippet. Should it be "currRow"? For your sake and ours,
copy/paste your code; don't re-type it.
4. Tell us what version of Python [why are you using dict.has_key??],
what platform, how much memory.
5. Tell us what "very slow" means e.g. how many rows per second.

HTH,
John



From codecraig at gmail.com  Wed Nov  1 07:54:32 2006
From: codecraig at gmail.com (abcd)
Date: 1 Nov 2006 04:54:32 -0800
Subject: wxPython TextCtrl - weird scrolling behavior
In-Reply-To: <mailman.1573.1162339030.11739.python-list@python.org>
References: <1162237089.308746.70370@e3g2000cwe.googlegroups.com>
	<PJs1h.204$1n3.4348@news.tufts.edu>
	<1162238656.661097.75180@f16g2000cwb.googlegroups.com>
	<N6t1h.205$1n3.4487@news.tufts.edu>
	<1162240822.260735.316040@e64g2000cwd.googlegroups.com>
	<2yt1h.206$1n3.4433@news.tufts.edu>
	<1162242161.009063.65140@e64g2000cwd.googlegroups.com>
	<ZSJ1h.211$1n3.4629@news.tufts.edu>
	<mailman.1573.1162339030.11739.python-list@python.org>
Message-ID: <1162385672.853549.19620@h48g2000cwc.googlegroups.com>

thanks for the feedback, I am watching the screencasts, which are
helping already.  I think I will try out the Dabo GUI tool since it
uses wxPython...and see if I can get the code I need from it.

thanks



From anthra.norell at vtxmail.ch  Wed Nov  8 10:24:54 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 08 Nov 2006 16:24:54 +0100
Subject: Character encoding
In-Reply-To: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
References: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
Message-ID: <4551F6C6.70704@vtxmail.ch>

mp wrote:
> I have html document titles with characters like &gt;, &nbsp;, and
> &#135. How do I decode a string with these values in Python?
>
> Thanks
>
>   
This is definitely the most FAQ. It comes up about once a week.

The stream-editing way is like this:

 >>> import SE
 >>> HTM_Decoder = SE.SE ('htm2iso.se') # Include path

>>> test_string = '''I have html document titles with characters like &gt;, &nbsp;, and
&#135;. How do I decode a string with these values in Python?'''
>>> print HTM_Decoder (test_string)
I have html document titles with characters like >,  , and
?. How do I decode a string with these values in Python?

An SE object does files too.

>>> HTM_Decoder ('with_codes.txt', 'translated_codes.txt')  # Include path

You could download SE from -> http://cheeseshop.python.org/pypi/SE/2.3. The translation definitions file "htm2iso.se" is included. If you open it in your editor, you can see how to write your own definition files for other translation tasks you may have some other time.

Regards

Frederic





From python at hope.cz  Thu Nov  9 04:58:13 2006
From: python at hope.cz (Lad)
Date: 9 Nov 2006 01:58:13 -0800
Subject: Sorted list - how to change it
In-Reply-To: <eiutv1$jvh$1@ork-un.noris.net>
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
	<eiutv1$jvh$1@ork-un.noris.net>
Message-ID: <1163066293.423953.292460@m7g2000cwm.googlegroups.com>


Wolfram Kraus wrote:
> On 09.11.2006 10:52, Lad wrote:
> > I have a sorted list for example [1,2,3,4,5] and I would like to change
> > it in a random way
> > e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
> > ordered.
> > What is the best/easiest
> >  way how to do it?
> >
> > Thank you for help
> > L.
> >
> use random.shuffel:
>
> >>> import random
> >>> x = [1,2,3,4,5]
> >>> random.shuffle(x)
> >>> x
> [1, 4, 2, 3, 5]
> >>> random.shuffle(x)
> >>> x
> [4, 2, 1, 3, 5]
>
> see: http://docs.python.org/lib/module-random.html
 Wolfram,
Thanks a lot for help
L.



From sven.dahlstrand at gmail.com  Fri Nov 10 14:58:22 2006
From: sven.dahlstrand at gmail.com (Sven)
Date: 10 Nov 2006 11:58:22 -0800
Subject: urlretrieve get file name
In-Reply-To: <mailman.2008.1163118450.11739.python-list@python.org>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
	<mailman.2004.1163115558.11739.python-list@python.org>
	<1163116359.787681.31490@m73g2000cwd.googlegroups.com>
	<mailman.2008.1163118450.11739.python-list@python.org>
Message-ID: <1163188701.981923.18960@h48g2000cwc.googlegroups.com>

Yes the browser suggests a file name, but I did a little research using
http://web-sniffer.net/. The Response Header contains roughly this:

HTTP Status Code: HTTP/1.1 302 Found
Location: http://page.com/filename.zip
Content-Length: 0
Connection: close
Content-Type: text/html

The status code 302 tells the browser where to find the file. The funny
thing is that calling the info() function, on the file-like response
object, in Python doesn't return the same header. I'm so stuck. :-)
Thanks for your help.

On 10 Nov, 01:27, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Thursday 9/11/2006 20:52, Sven wrote:
>
> >Thanks for your help, but I'm a guy with no luck. :-) I can't get the
> >file name from response header...Try using a browser and "Save as..."; if it suggests a file name, it
> *must* be in the headers - so look again carefully.
> If it does not suggests a filen ame, the server is not providing one
> (there is no obligation to do so).
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! -http://correo.yahoo.com.ar



From bignose+hates-spam at benfinney.id.au  Sun Nov 12 23:11:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 13 Nov 2006 15:11:31 +1100
Subject: how do i map this?
References: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
Message-ID: <87zmawgf4c.fsf@benfinney.id.au>

"ronrsr" <ronrsr at gmail.com> writes:

> #row is a dictionary with keys: zid, keywords, citation, quotation
> def print_row(row):
>    print """<tr>
>       <td class="pad">%(keywords)s
>       </td>
>       <td class="pad">%(quotation)s
>       </td>
>       <td class="pad">%(citation)s
>       </td>
>       <td class="pad" align="center"><form action="update.py"
> name="updateform" enctype="application/x-www-form-urlencoded"
> method="GET"><input type="hidden" name="zid" value="%(zid)d"><input
> type="submit" value="Edit"></form>
>       </td>
>       </tr>
>       """

You're printing a string, and never using that 'row' parameter.

Perhaps this will help illustrate:

    >>> print "spam %(foo)s eggs"
    spam %(foo)s eggs
    >>> print "spam %(foo)s eggs" % {'foo': "Wortle"}
    spam Wortle eggs

The 'print' statement doesn't care about the format specifiers; it
just wants a string expression. It's the formatting operator, '%',
that looks for them.

    <URL:http://docs.python.org/lib/typesseq-strings.html>

-- 
 \       "When I was little, my grandfather used to make me stand in a |
  `\   closet for five minutes without moving. He said it was elevator |
_o__)                                     practice."  -- Steven Wright |
Ben Finney



From martin at v.loewis.de  Fri Nov 10 19:02:55 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 11 Nov 2006 01:02:55 +0100
Subject: Python 2.5 Core Dump on Solaris 8
In-Reply-To: <mailman.2071.1163195374.11739.python-list@python.org>
References: <mailman.2071.1163195374.11739.python-list@python.org>
Message-ID: <4555132f$0$3586$9b622d9e@news.freenet.de>

Melissa Evans schrieb:
> I've modified grappy.py,
> http://www.stacken.kth.se/~mattiasa/projects/grappy/, a postfix policy
> daemon for greylisting. to use LDAP as a backend instead of SQL (with
> python-ldap.)  The daemon runs fine when testing but when I put it under
> load it core dumps quickly.  What little analysis I know how to do shows
> similar information every time.  Any advice on where to go from here?

It looks like a memory allocation bug, e.g. caused by a double free,
or possibly a buffer overrun. It's unlikely that the Python interpreter
itself has such a bug, so it's likely rather caused in an extension
module (e.g. the ldap module).

Analysing such a problem is tedious. You should create a debug build
of Python (which already has some memory checks) and see whether it
reports anything. Then, you could try a debug malloc next (such
as dmalloc.com). If you have a license, you can use Purify, if not,
try Valgrind (not sure whether it runs on Solaris, though). Another
such library is ElectricFence.

Good luck,
Martin


From erinhouston at gmail.com  Mon Nov  6 23:38:15 2006
From: erinhouston at gmail.com (ina)
Date: 6 Nov 2006 20:38:15 -0800
Subject: using split function
In-Reply-To: <1162874036.351559.263280@i42g2000cwa.googlegroups.com>
References: <1162874036.351559.263280@i42g2000cwa.googlegroups.com>
Message-ID: <1162874295.593635.273260@i42g2000cwa.googlegroups.com>


amitsoni.1984 at gmail.com wrote:
> Hi,
>
> I have to write a code in python to read a matrix from a text file and
> for that i am using following code. But it gives an error saying
> "NameError: name 'split' is not defined". Can anyone help me with this.
> -------------------------------------------------
> #!/usr/bin/python
> import numpy
> file = open('matrix.txt', 'r')
>
> count =  0
> ra = numpy.random
> A = ra.standard_normal((4,4))
> while 1:
>     lineStr = file.readline()
>     if not(lineStr):
>         break
>
>     count = count + 1
>     row=split(lineStr)
>     A[count,:]=row
>
> matrix.close()
> -----------------------------------------------------
> Also, i want to initialize the matrix A by zeros, but using A=zeros([4,
> 4]) was giving a similar error "NameError: name 'zeros' is not
> defined".
>
> Thank you
> Amit
This is how I would do it.
for lineStr in file:
...row = lineStr.split()

you could also use str.split(lineStr) but the other way is cleaner



From rajani.vemula at gmail.com  Thu Nov  9 07:06:53 2006
From: rajani.vemula at gmail.com (Raj)
Date: 9 Nov 2006 04:06:53 -0800
Subject: Post data using the libcurl
Message-ID: <1163074013.616584.281450@b28g2000cwb.googlegroups.com>

Hi,
I am newbie to programming with libcurl. the problem is i want to send
my gmail username and password outside the browser and get access to my
mail. this i am doing with LibCurl. Though i dont get any errors, i am
nt able to get the o/p Can anyone kindly help. i will attach the
program here
#include <curl/curl.h>
 #include <curl/types.h>
 #include <curl/easy.h>

 int main(int argc, char *argv[])
 {
   CURL *curl;
   CURLcode res;

   struct curl_httppost *formpost=NULL;
   struct curl_httppost *lastptr=NULL;
   struct curl_slist *headerlist=NULL;
   char buf[] = "Expect:";

   curl_global_init(CURL_GLOBAL_ALL);

   /* Fill in the file upload field */
   curl_formadd(&formpost,
              &lastptr,
                CURLFORM_COPYNAME, "rajani.vemula",
                CURLFORM_END);

   /* Fill in the filename field */
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "xxxxx",
                CURLFORM_END);
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "null",
                CURLFORM_COPYCONTENTS, "Sign in",
                CURLFORM_END);




   curl = curl_easy_init();
   /* initalize custom header list (stating that Expect: 100-continue
is
 not
      wanted */
   headerlist = curl_slist_append(headerlist, buf);
   if(curl) {
     /* what URL that receives this POST */
     curl_easy_setopt(curl, CURLOPT_URL,"
http://mail.google.com/mail");
     curl_easy_setopt(curl, CURLOPT_PROXY, "proxyname");
   curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "User:Password)";
       /* only disable 100-continue header if explicitly requested */
       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
     res = curl_easy_perform(curl);

     /* always cleanup */
     curl_easy_cleanup(curl);

     /* then cleanup the formpost chain */
     curl_formfree(formpost);
      curl_slist_free_all(headerlist
  }
   return 0;
 }

Thanks



From junk.rubbish at alma-services.abel.co.uk  Sat Nov 11 17:46:38 2006
From: junk.rubbish at alma-services.abel.co.uk (Sandy)
Date: Sat, 11 Nov 2006 22:46:38 +0000
Subject: Python Parallel Paradigm
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<4556246a$0$326$e4fe514c@news.xs4all.nl>
	<1163276885.609160.163090@h54g2000cwb.googlegroups.com>
Message-ID: <vCJIsbAOLlVFNwjs@alma-services.abel.co.uk>

In article <1163276885.609160.163090 at h54g2000cwb.googlegroups.com>,
Mythmon at gmail.com wrote

>Well, I tried that, and it did something. It made it so the space bar
>switched the clock once, but not a second time. And it still crashed,
>but not always at the same time, sometimes it would do it the second
>time I hit the space bar, sometimes before I hit it the first time, but
>always when i did something that would generate a Console event (moving
>the mouse or something). So, I thought it had something to do with
>Console not working well with threads, so I took it completely out of
>threads and had just the event checking loop run by itself, and it
>still crashed. So apparently I am using the Console events wrong. I am
>going to try and find some examples online on how to watch for events
>with it, but if worse comes to worse I can try and use keyboard hooks,
>I've looked at those before, and they might work better.

Dear Pythonauts,

    I usually lurk on the comp.lang.python newsgroup.  I'm not an expert
in the slightest, but I have had a growing feeling that there's
something definitely lacking in the concurrency aspects of Python.  It
is the same problem with Java.  Forgive me if I don't know the right
vocabulary, but Python concurrency seems to be exposed at too "low a
level".  It's like assembler:  it's all _possible_ to implement, but in
practise it's very complicated and fragile, glitchy, and really
difficult to extend.  Like programming in Dartmouth BASIC with just
conditionals and "goto" instructions, before structured programming.

    A higher-level system of concurrency, not based on monitors and
locks and great programmer discipline, will ultimately require making
"Python 3000" a reality.  

    In the meantime, is there anywhere, or any thing, that discusses the
various concurrency options related to Python?  There's Stackless Python
(which I can't make head or tail of; I have been unable to find any
lucid overview, or genuine explanation of the purpose of the design.)  I
know that there's a package for an Erlang system for Python, somewhere
("Parnassus" probably).  There's probably a Py-CSP somewhere too.  Lots
of trees, but where's the Wood?

    Where are concurrency/distributed models compared and discussed?

With kind regards,    

Sandy
-- 
Alexander Anderson <junk.rubbish at alma-services.abel.co.uk>
(Yorkshire, England)

       Where there is no vision, the people perish.


From CRhode at LacusVeris.com  Wed Nov 29 21:45:09 2006
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Wed, 29 Nov 2006 20:45:09 -0600
Subject: PythonTidy
Message-ID: <20061130024509.GA8961@loki>

I couldn't find a routine to clean up, regularize, and reformat Python
code, so I wrote one:

  http://www.lacusveris.com/PythonTidy/PythonTidy.python

Now, I'm looking for beta-testers.  Compensation is a bit on the low
side.  In fact it's limited to the satisfaction of helping out.
Thanks.

-- 
.. Chuck Rhode, Sheboygan, WI, USA


From nitte.sudhir at gmail.com  Mon Nov 13 13:37:32 2006
From: nitte.sudhir at gmail.com (kath)
Date: 13 Nov 2006 10:37:32 -0800
Subject: A question on Encoding and Decoding.
Message-ID: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>

Hi all,

Platform:            winxp
Version:             Python 2.3

I have a task of reading files in a folder and creating an one excel
file with sheets, one sheet per file, with sheet named as filename. I
am facing problem in handling special characters. I am using XLRD and
XLW package to read/write  from/to file. But facing problem in handling
special characters. I am getting encode error.

UnicodeDecodeError 'ascii' codec can't encode character u'\xdf' in
position 19: ordinal not in range(128)
row:  76

the cell value at rowx = 76, colx = 0  is
'Activest-Aktien-Gro?britannien'

I used Latin-1 encoding, but after the file is created I get an error
'Unable to read the file'.

When I get the exception I want to format the string so that I can use
it to write to a file and also query database.

Can anybody guide how to solve this problem. what encoding I should
use, and after wring to file I should the same special character.

Also python IDLE is able to output the same character corretly when I
say print and why not I?


Any suggestions would be greatly appreciated.

thanks.
regards,
kath.



From ronrsr at gmail.com  Fri Nov 10 12:27:02 2006
From: ronrsr at gmail.com (ronrsr)
Date: 10 Nov 2006 09:27:02 -0800
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <ej2ce8$vsc$1@cernne03.cern.ch>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>
	<1163178581.231837.18120@h48g2000cwc.googlegroups.com>
	<ej2ce8$vsc$1@cernne03.cern.ch>
Message-ID: <1163179622.691812.96170@h48g2000cwc.googlegroups.com>

the exact code that is triggering the error message is:

zc = zsql.connect()


exact error message:  SyntaxError:  Invalid Syntax


but any statement that follows the import statement will trigger it.

bests,

r-sr-




Roberto Bonvallet wrote:
> ronrsr wrote:
> > thanks for the speedy answer.  what i meant was:
> >

> Could you please copy and paste the exact code that is triggering the
> error, and the exact error message?
>
> (BTW, in Python you don't need to end your statements with a semi-colon)
> -- 
> Roberto Bonvallet



From ardsrk at gmail.com  Sat Nov  4 07:31:29 2006
From: ardsrk at gmail.com (ArdPy)
Date: 4 Nov 2006 04:31:29 -0800
Subject: small python cgi webserver
In-Reply-To: <mailman.1761.1162636919.11739.python-list@python.org>
References: <mailman.1760.1162630079.11739.python-list@python.org>
	<1162635479.491109.15640@h54g2000cwb.googlegroups.com>
	<mailman.1761.1162636919.11739.python-list@python.org>
Message-ID: <1162643489.722245.262290@m7g2000cwm.googlegroups.com>


Fabian Braennstroem wrote:
> Hi,
>
> * ArdPy <ardsrk at gmail.com> wrote:
> >
> > Fabian Braennstroem wrote:
> >> Hi,
> >>
> >> I am looking for a small python script, which starts a small
> >> web server with python cgi support on a linux machine.
> >>
> >> I tried:
> >>
> >>
> >>   #!/usr/bin/env python
> >>   import sys
> >>   from CGIHTTPServer import CGIHTTPRequestHandler
> >>   import BaseHTTPServer
> >>
> >>   class MyRequestHandler(CGIHTTPRequestHandler):
> >>       # In diesem Verzeichnis sollten die CGI-Programme stehen:
> >>       cgi_directories=["/home/fab/Desktop/cgi-bin"]
> >>
> >>
> >>   def run():
> >>       # 8000=Port-Nummer
> >>       #   --> http://localhost:8000/
> >>       # Fuer http://localhost/
> >>       #   Port-Nummer auf 80 setzen
> >>       httpd=BaseHTTPServer.HTTPServer(('', 8000), MyRequestHandler)
> >>       httpd.serve_forever()
> >>
> >>   if __name__=="__main__":
> >>       print "Starting Server"
> >>       run()
> >>
> >> but when I want to test a small python cgi test file:
> >>
> >>
> >>   #!/usr/bin/python
> >>   # -*- coding: UTF-8 -*-
> >>
> >>   # Debugging f?r CGI-Skripte 'einschalten'
> >>   import cgitb; cgitb.enable()
> >>
> >>   print "Content-Type: text/html;charset=utf-8\n"
> >>   print "Hello World!"
> >>
> >> I just get the text and not the html output. The file's mode
> >> is 755.
> >>
> >> Is there anything wrong with the webserver script or do I do
> >> something completely wrong? Maybe, you have a different
> >> webserver script?
> >>
> >> Greetings!
> >>  Fabian
> >
> > Probably the server is not executing your CGI script. If it is the
> > Apache web server that you are using then just ensure the following
> > settings in your /etc/httpd/conf/httpd.conf file is exactly like
> > following:
> >
> > <Directory "/var/www/cgi-bin">
> >     AllowOverride None
> >     Options ExecCGI
> >     Order allow,deny
> >     Allow from all
> > </Directory>
>
> Maybe, I understood something wrong, but I thought that the
> above 'webserver' script would replace apache in my case; at
> least I hoped!?
>
> Greetings!
>  Fabian

Oh yes...Your script is supposed to replace apache. I tried with your
script on my pc and its working just fine. However the problem still is
that the server is taking your file to be a plain file rather than a
CGI script. Looking at CGIHTTPServer.is_cgi method might prove helpful.



From fredrik at pythonware.com  Thu Nov 16 03:11:58 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 09:11:58 +0100
Subject: How to make a python file to a DLL?
In-Reply-To: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
References: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
Message-ID: <ejh6ge$q3l$2@sea.gmane.org>

many_years_after wrote:

> Any solution?

python modules are usually shipped in ZIP archives, not DLLs.  if you 
really need a DLL, you can use "freeze" and some custom hacking.  or 
bytecode resources, and some more custom hacking.

</F>



From insyte at gmail.com  Tue Nov 14 11:39:13 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 14 Nov 2006 08:39:13 -0800
Subject: __cmp__ between dissimilar objects
In-Reply-To: <mailman.137.1163507608.32031.python-list@python.org>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<mailman.137.1163507608.32031.python-list@python.org>
Message-ID: <1163522353.529662.58050@f16g2000cwb.googlegroups.com>

> why not just inherit from datetime instead?

I'll probably do that in the next iteration.

> or read footnote 4 under "supported operations" on this page for info on how to
> implement mixed-type comparisions:
>
>     http://docs.python.org/lib/datetime-datetime.html

OK.  I added a 'timetuple' attribute to my class.  Now comparisons seem
to "just work".  This has made it even more obvious to me that I don't
understand how comparisons function:

If the GeneralizedTime instance is on the LHS of the comparison and the
datetime instance on the RHS, why would datetime's __cmp__ method be
called?  I assume its being called since GeneralizedTime sure doesn't
care whether or not it has a timetuple attribute...

I've read through the "Basic customization" section of the language
reference, which doesn't seem to describe a scenario where the __cmp__
method on the RHS is called.

Thanks...

-Ben



From guy.flowers at Machineworks.com  Thu Nov 23 09:19:35 2006
From: guy.flowers at Machineworks.com (guy.flowers at Machineworks.com)
Date: 23 Nov 2006 06:19:35 -0800
Subject: non blocking "i o", The deep freeze.
Message-ID: <1164291575.215166.29330@m7g2000cwm.googlegroups.com>

Hi

Have a problem, Ill give some history to the problem and add a little
example code to start with
to see if anybody can help or if I am correct in what the problem is.

I have been looking on the newsgroups and have found lots of stuff on
the problem
but no solutions as of yet, will keep looking here to see if I can find
one that fits.

I created a script which runs a whole suite of regression tests, the
test exe which is
built daily, is created from c code, this changes from day to day as
stuff is added, and fixed, the exe is then used to run text files which
have lots of commands and data in, which produce lots of pretty
pictures on the screen, errors and warning output is also produced from
this, which I collect and create logs with. Up until recently I havn't
had any problems with my script, the main tests were run on a local
win32 machine with all the logs and test files all local, with
occasional runs on various different unix's and win64 platforms. We
have just recently had installed a big test and build rack full of
win32 (winxp) machines 3 of these are automated test machines which run
my script in a loop (it also builds the test exe and does one or two
other things), the test files are now held on a big central disk, which
was ment to save me coping data down from the network. The whole thing
works pretty well, a part from every so offen completely randomly the 3
machines seem to freeze (or to put in the terms of our sys admin it
trashes them).
The machines needs to be reset and the connection between the machines
and the big central disk is lost and needs to be reset as well.

According to the sys admin I need to be using, non blocking "i o" for
my file control, the code below shows what Im doing at the moment. Has
any one got any suggestions on what to do here, I kept everything
really simple so it would work across all platform and I thought I was
there,
but like with most things, its not and the code will probably get
really complex.
The code below is only a small snipet and I've made it simple for this
example but its the part I think where the freeze is happening.


output, input = popen2("cmd.exe")

input.write("set LI_DIR=" + MW_OPTS.GetOption("MainOpts","LI_DIR") +
"\n")
input.write("set LI\n")

# Writes commands to it.
input.write(mwtest_exe + mwtest_args +  os.path.dirname(f_testlwc_str)
+  testlwc + "\n")
input.write("exit\n")

while 1:
  text = output.readline()
  if text:
    OutputCount += 1
    # Searches the line for errors, when found stops doing this.
    f_Error_Code = FileLineQuickStat(text , f_Possible_Errs_dict ,
f_Error_Code)
    # Records the line in a log.

LW_FLOG.WriteLogEntry("TEST_LOG",str(OutputCount),string.replace(text,"\n",""),1)
  else:
    LW_FLOG.FinishLog("TEST_LOG","")
    # Returns the error code.
    return f_Error_Code
    break

TIA
Guy



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 01:25:39 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 11 Nov 2006 17:25:39 +1100
Subject: mushrooms are animals? [was Re: Py3K idea: why not drop the
	colon?]
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<mailman.2044.1163176635.11739.python-list@python.org>
	<pan.2006.11.11.00.48.57.493691@REMOVE.THIS.cybersource.com.au>
	<mailman.2082.1163220118.11739.python-list@python.org>
Message-ID: <pan.2006.11.11.06.25.26.773997@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 22:41:53 -0600, skip wrote:

> 
>     Steven> The world seems to be flat, the sun appears to rotate around the
>     Steven> Earth, and mushrooms look like they are more closely related to
>     Steven> plants than to animals, but none of these things are actually
>     Steven> the case.
> 
> Where can I read about mushrooms as animals?

Mushrooms, like all fungi, aren't animals. The old divide of the
living world into animals and plants has been obsolete in biology for
decades. Biologists today generally follow Woese's "Six Kingdoms":

Eubacteria ("ordinary bacteria")
Archaebacteria ("extrophile bacteria")
Fungi
Plantae (plants)
Animalia (animals)
Protista (eukaryotes that are neither fungi, plants or animals -- a
grab-bag of "things left over" such as protozoa and algae)

Notice that, although to the naked microscope eubacteria and
archaebacteria seem very similar, their biochemistry is radically
different -- more so than (say) an oak tree and you or I.

Based on molecular and DNA evidence, fungi and animals are more similar
than fungi and plants. (Remember that animals include many thousands of
species that don't walk or crawl or fly, beasties like corals, sponges and
other creatures that look superficially plant-like.) Both animals and
fungi rely on plants to convert solar energy into chemical forms that they
can digest.

The best evidence is that the animal kingdom (including, naturally, human
beings) and fungi split during the Mesoproterozoic Era, approximately
1500-2000 million years ago. The common ancestor ("concestor") of animals
and fungi split from plants not long before that, where by "not long" I
of course mean "many hundreds of millions of years".

Richard Dawkins' excellent book "The Ancestor's Tale" is worth reading for
more about this. But keep in mind that biology is in a constant state of
flux these days, with new molecular discoveries virtually every day, so
dates are naturally uncertain and subject to revision. (Aside: this
willingness, even desire, to revise old beliefs in the light of new
evidence disproves the Creationist canard that evolution is a matter of
faith rather than science -- but I digress.)

See also http://en.wikipedia.org/wiki/Fungi for more about fungi including
mushrooms, although regrettably little on their evolutionary relationship
with other species. Follow the references there to discover more.

http://en.wikipedia.org/wiki/Kingdom_%28biology%29 discusses the
biological kingdoms -- again, treat Wikipedia as the start, not the end,
of your reading :)


-- 
Steven.



From cyberco at gmail.com  Wed Nov 22 03:09:40 2006
From: cyberco at gmail.com (cyberco)
Date: 22 Nov 2006 00:09:40 -0800
Subject: Is python for me?
In-Reply-To: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
Message-ID: <1164182979.958434.243130@k70g2000cwa.googlegroups.com>

One resource you should always keep at hand is this extremely useful
Quick Reference:

http://rgruet.free.fr/PQR24/PQR2.4.html

Study it carefully, there is a lot in there that can teach you about
how Python works. Fire up IPython as well and start hacking!

2B



From tom at t0mb.net  Sat Nov 18 12:22:02 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 17:22:02 +0000
Subject: basic python questions
In-Reply-To: <455F3F24.2080609@t0mb.net>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>	<pan.2006.11.18.09.33.16.488148@gmx.net>	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<455F3F24.2080609@t0mb.net>
Message-ID: <455F413A.5010409@t0mb.net>

tom wrote:
> nateastle at gmail.com wrote:
>   
>> I have taken the coments and think I have implemented most. My only
>> question is how to use the enumerator. Here is what I did, I have tried
>> a couple of things but was unable to figure out how to get the line
>> number.
>>
>>   
>>     
> Try this in the interpreter,
>
> l = [5,4,3,2,1]
> for count, i in enumerate(l):
>     print count, i
>
>
>   
you could do it like this.

for count, line in enumerate(fb):
    for word in line.split():
       etc...

filehandles are iterators themselves.

dont take my words for granted though, i'm kinda new to all this too :)
>> def Xref(filename):
>>     try:
>>         fp = open(filename, "r")
>>     except:
>>         raise "Couldn't read input file \"%s\"" % filename
>>     dict = {}
>>     line_num=0
>>     for words in iter(fp.readline,""):
>>         words = set(words.split())
>>         line_num = line_num+1
>>         for word in words:
>>             word = word.strip(".,!?:;")
>>             if not dict.has_key(word):
>>                 dict[word] = []
>>             dict[word].append(line_num)
>>     fp.close()
>>     keys = sorted(dict);
>>     for key in keys:
>>         print key," : ", dict[key]
>>     return dict
>>
>> Marc 'BlackJack' Rintsch wrote:
>>   
>>     
>>> In <1163829271.660193.70450 at j44g2000cwa.googlegroups.com>,
>>> nateastle at gmail.com wrote:
>>>
>>>     
>>>       
>>>> def Xref(filename):
>>>>     try:
>>>>         fp = open(filename, "r")
>>>>         lines = fp.readlines()
>>>>         fp.close()
>>>>     except:
>>>>         raise "Couldn't read input file \"%s\"" % filename
>>>>     dict = {}
>>>>     for line_num in xrange(len(lines)):
>>>>       
>>>>         
>>> Instead of reading the file completely into a list you can iterate over
>>> the (open) file object and the `enumerate()` function can be used to get
>>> an index number for each line.
>>>
>>>     
>>>       
>>>>         if lines[line_num] == "":  continue
>>>>       
>>>>         
>>> Take a look at the lines you've read and you'll see why the ``continue``
>>> is never executed.
>>>
>>>     
>>>       
>>>>         words = lines[line_num].split()
>>>>         for word in words:
>>>>             if not dict.has_key(word):
>>>>                 dict[word] = []
>>>>             if line_num+1 not in dict[word]:
>>>>                 dict[word].append(line_num+1)
>>>>       
>>>>         
>>> Instead of dealing with words that appear more than once in a line you may
>>> use a `set()` to remove duplicates before entering the loop.
>>>
>>> Ciao,
>>> 	Marc 'BlackJack' Rintsch
>>>     
>>>       
>>   
>>     
>
>   



From martin at v.loewis.de  Sat Nov  4 12:26:13 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 04 Nov 2006 18:26:13 +0100
Subject: win32file.DeviceIoControl(FSCTL_GET_RETRIEVAL_POINTERS)
In-Reply-To: <1162660691.829676.85990@h48g2000cwc.googlegroups.com>
References: <1162660691.829676.85990@h48g2000cwc.googlegroups.com>
Message-ID: <454CCD35.6010201@v.loewis.de>

Jim schrieb:
> I'm not sure how to perform this operation in Python. The difficulty is
> in knowing the size of the output buffer: if it is too small, I get an
> "insufficient buffer" exception; too large, and I get an "end of file"
> exception. In neither case is any partial data available.

What precisely is the "end of file" exception you are getting. Looking
at

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/fsctl_get_retrieval_pointers.asp

I'd say it is

ERROR_HANDLE_EOF 	The volume is an NTFS file system volume and the
requested starting VCN is past the end of the file.

So my guess is you should just pass a smaller starting VCN.

Regards,
Martin


From grante at visi.com  Sat Nov 25 09:22:30 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Nov 2006 14:22:30 -0000
Subject: Simple threading
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
	<mailman.704.1164434215.32031.python-list@python.org>
Message-ID: <12mgkd6e5cp5l16@corp.supernews.com>

On 2006-11-25, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:

>>I'm just getting started on threading and was wondering why the
>>following code does not work (i know globals is bad style - I'll
>>eliminate them eventually).  All I get is a blank cursor flashing.
>
> You've got your example already working. Globals are bad
> style, but worse, threads and globals don't mix very well: you
> need some sort of syncronization for accessing globals 
> (specially for writing them).

That depends on the type of the global and how they're used.
Re-binding a name is always an atomic operation.  Modifying
many mutable objects is atomic.

>>class ImapThread(threading.Thread):
>>     def run(self):
>>         global g_currenttick
>>         if time.time() > (g_datum + (g_secondspertick *
>>g_currenttick)):
>>             print "Ticked %s" % g_currenttick
>>             g_currenttick=g_currenttick+1
>>             print g_currenttick
>
> Having more than one thread, g_currenttick could have been modified 
> *after* you read its value and *before* you write it back, so you 
> lose the count.

Right. Reading an integer object in one statement and writing
it in a subsequent statement is not an atomic opteration unless
protected by some synchronization mechanism.

-- 
Grant Edwards
grante at visi.com



From fredrik at pythonware.com  Sat Nov 25 10:47:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 16:47:45 +0100
Subject: Dynamic function execution
In-Reply-To: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
References: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
Message-ID: <ek9oj2$i9m$1@sea.gmane.org>

Andy Wu wrote:

> def func(seconds = None, minutes = None, hours = None):
>     ...
> 
> In my program I can get a string object('seconds', 'minutes', 'hours')
> to specify which parameter to use, the problem is I don't know how to
> call the function.
> 
> Say I have a string 'minutes' and a integer 30, now I need to call the
> func this way: func(minutes = 30), how do I do this?

    func(**{"minutes": 30})

</F>



From tejovathi.p at gmail.com  Thu Nov  2 00:52:30 2006
From: tejovathi.p at gmail.com (Teja)
Date: 1 Nov 2006 21:52:30 -0800
Subject: Regular Expression for a string
In-Reply-To: <1162445312.608506.177340@m7g2000cwm.googlegroups.com>
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
	<1162445312.608506.177340@m7g2000cwm.googlegroups.com>
Message-ID: <1162446750.170597.84480@b28g2000cwb.googlegroups.com>


John Machin wrote:

> Teja wrote:
> > HI all,
> >
> > I need to write a regular experssion for a string which satisfies the
> > following a criteria :
> >
> > 1) it should start with an alphabet
> > 2) it can contain alphabets/digits/_ from second character
> > 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional
>
> Based on the examples you give later, you don't mean "optional" (0 or 1
> occurrences), you mean 0 or more occurrences.
> Assuming "alphabet" means "English alphabetic":
>
> r"[a-zA-Z][a-zA-Z0-9_]*(\[[a-z0-9]\])*"
> 
> HTH,
> John

Thnks a lot....:)



From bernard.chhun at gmail.com  Thu Nov  9 07:48:31 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 9 Nov 2006 04:48:31 -0800
Subject: substring search without using built in utils
In-Reply-To: <mailman.1949.1163035784.11739.python-list@python.org>
References: <mailman.1949.1163035784.11739.python-list@python.org>
Message-ID: <1163076511.535543.231190@e3g2000cwe.googlegroups.com>

do your homework and use regexes! but the find() and in() function
works great for normal strings...why don't you want to use them?

zeal elite a ?crit :

> Hi,
>
> I am looking for substring search python program without using the built in
> funtions like find, or 'in'.
>
> Appreciate it. Thanks in advance.
> zeal
>
> _________________________________________________________________
> Find a local pizza place, music store, museum and more...then map the best
> route!  http://local.live.com?FORM=MGA001



From tundra at tundraware.com  Wed Nov  8 15:59:38 2006
From: tundra at tundraware.com (Tim Daneliuk)
Date: Wed, 08 Nov 2006 14:59:38 -0600
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <1163016063.961485.224390@k70g2000cwa.googlegroups.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
Message-ID: <n2t924-frs.ln1@eskimo.tundraware.com>

Sefyroth wrote:
> Thanks,
> 
> but I get this error when I try this.
> 
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
> position 12: ordinal not in range(128)
> 
>  I had encountered it with the askdirectory method as well. Is there an
> easy way to bypass this?
> 
> Thanks again

I believe you are running into a directory or file name that has
non-ascii characters in it.  Python as shipped is set up to
deal with ascii as its native encoding format.  You can change
this by editing the "site.py" file - look in the Lib directory
in your python installation.  Look for this code:

-------------------------------
def setencoding():
     """Set the string encoding used by the Unicode implementation.  The
     default is 'ascii', but if you're willing to experiment, you can
     change this."""
     encoding = "ascii" # Default value set by _PyUnicode_Init()
     if 0:
         # Enable to support locale aware default string encodings.
         import locale
         loc = locale.getdefaultlocale()
         if loc[1]:
             encoding = loc[1]
-------------------------------



Change the "if 0:" to "if 1:" and see if that doesn't fix the problem.



-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From steven.bethard at gmail.com  Mon Nov  6 10:56:13 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 06 Nov 2006 08:56:13 -0700
Subject: Python Distilled
In-Reply-To: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
Message-ID: <08Odnc6j7uKLxtLYnZ2dnUVZ_oydnZ2d@comcast.com>

Simon Wittber wrote:
> I want to build a Python2.5 interpreter for an embedded system. I only
> have 4MB of RAM to play with, so I want to really minimise the python
> binary.
[snip]
> Google tells me that people have done this before, back in Python1.5.2
> days. Has anyone tried to do this recently with a more modern Python?

http://www.python.org/dev/summary/2006-09-16_2006-09-30/#shrinking-python

STeVe


From nospam at domain.tld  Sat Nov 25 03:52:42 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Sat, 25 Nov 2006 09:52:42 +0100
Subject: Ruby/Python/REXX as a MUCK scripting language
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <ek908q$p32$1@kohl.informatik.uni-bremen.de>

Tony Belding wrote:

> Is this practical?  I'm thinking of Ruby or Python for this, if they
> can meet the requirements.

Python had a sandbox module, but is was discarded because of security
problems.

If you want it working on MacOS, you may also have a look at Tcl, which has
a long tradition on MacOS and it comes with a very good implemented and
fully customizable sandbox. For a starting point, if Tcl sandbox meets your
requirements, have a look here:

Safe Tcl Overview: http://www.tcl.tk/software/plugin/safetcl.html
Docs about the specific Tcl commands, to create safe interpreters:
http://www.tcl.tk/man/tcl8.4/TclCmd/interp.htm (See in the lower third of
the page at "Safe Interpreters")
http://www.tcl.tk/man/tcl8.4/TclCmd/safe.htm

Regards
Stephan


From jorge.vargas at gmail.com  Mon Nov  6 01:07:46 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 6 Nov 2006 06:07:46 +0000
Subject: how to write code into a blog post?
In-Reply-To: <1162680019.930647.36130@m7g2000cwm.googlegroups.com>
References: <mailman.1764.1162647888.11739.python-list@python.org>
	<1162680019.930647.36130@m7g2000cwm.googlegroups.com>
Message-ID: <32822fe60611052207r704ba1f9ndd4d5ef281cf37c6@mail.gmail.com>

On 4 Nov 2006 14:40:19 -0800, thebjorn
<BjornSteinarFjeldPettersen at gmail.com> wrote:
> Jorge Vargas wrote:
> > Hi I know many people here blog so sorry for the OT.
> >
> > Currently I have a wordpress install and went I wanted to post some
> > code I notice how painfull it is.
>
> Indeed :-)  I'm using the iG:Syntax Hiliter over on
> http://blog.tkbe.org after I got some comments about the lack of
> readability of my code samples ;-)  It can be even more colorful than
> I've set it up, but it handles a considerable number of languages and
> is pretty simple to both use and manage. You can get it at:
> http://blog.igeek.info/wp-plugins/igsyntax-hiliter/  I added the
> following to the end of the stylesheet to make the code frame bigger
> and dynamic:
>
> div.igBar { width: 95%; }
> div.syntax_hilite { width:95%; }
>
thanks I'll take a look at it

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


From paul at boddie.org.uk  Tue Nov  7 05:32:34 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 7 Nov 2006 02:32:34 -0800
Subject: Pyro stability
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
Message-ID: <1162895554.549926.49280@k70g2000cwa.googlegroups.com>

Beliavsky wrote:
> Carl J. Van Arsdall wrote:

[Enthusiasm for Pyro, not for those with sensitivity to rude words]

> You should watch your language in a forum with thousands of readers.

It was quite an endorsement, though. ;-)

Paul



From wileyregister22 at gmail.com  Tue Nov 28 03:55:34 2006
From: wileyregister22 at gmail.com (wileyregister22 at gmail.com)
Date: 28 Nov 2006 00:55:34 -0800
Subject: Accessing file metadata on windows XP
Message-ID: <1164704134.100569.101270@j72g2000cwa.googlegroups.com>

When rightclicking a, for example, pdf file on windows, one normally
gets a screen with three or four tags.  Clicking on one of the summary
tag one can get some info like "title", "Author", "category", "keyword"
etc..

My question is how can I programmatically read and change these data
with python.  I know I should use Hammond's win32  extension, somehow
involving the pythoncom, storagecon of win32com etc..  Unfortunately,
so far I cannot get anything useful.  Instead of trying blindly, would
somebody please points me to the correct direction.  A little snippet
would help.  I am particular interested in pdf files.



From python at hope.cz  Thu Nov  9 04:52:49 2006
From: python at hope.cz (Lad)
Date: 9 Nov 2006 01:52:49 -0800
Subject: Sorted list - how to change it
Message-ID: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>

I have a sorted list for example [1,2,3,4,5] and I would like to change
it in a random way
e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
ordered.
What is the best/easiest
 way how to do it?

Thank you for help
L.



From mike.klaas at gmail.com  Wed Nov  8 01:21:41 2006
From: mike.klaas at gmail.com (Klaas)
Date: 7 Nov 2006 22:21:41 -0800
Subject: Python memory usage
In-Reply-To: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
Message-ID: <1162966901.337252.45720@m7g2000cwm.googlegroups.com>

placid wrote:
> Hi All,
>
> Just wondering when i run the following code;
>
> for i in range(1000000):
>      print i
>
> the memory usage of Python spikes and when the range(..) block finishes
> execution the memory usage does not drop down. Is there a way of
> freeing this memory that range(..) allocated?

Python maintains a freelist for integers which is never freed (I don't
believe this has changed in 2.5).  Normally this isn't an issue since
the number of distinct integers in simultaneous use is small (assuming
you aren't executing the above snippet).

-Mike



From steve at holdenweb.com  Sat Nov 11 13:31:19 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Nov 2006 12:31:19 -0600
Subject: Assistance needed with PyCon sponsorship system
Message-ID: <ej54rs$293$1@sea.gmane.org>

It's that time of year again and the Python Software Foundation is 
cranking up for the fifth PyCon, again this year in Texas.

I am responsible for bringing in the sponsorship funds that help to keep 
this event so reasonably priced, and last year I built a PostgreSQL 
database to help with the emailing and the invoicing. However it needs 
some work, which I may not have time to complete myself, to make it 
easier to use and to improve reporting. Naturally the software, such as 
it is, is written entirely in Python.

Is there anyone out there who'd be prepared to help me with this project?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Thu Nov  2 01:30:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 07:30:23 +0100
Subject: need to find out all modules from site-packages
In-Reply-To: <QLudneBR2oOBGdTYnZ2dnUVZ_vmdnZ2d@comcast.com>
References: <QLudneBR2oOBGdTYnZ2dnUVZ_vmdnZ2d@comcast.com>
Message-ID: <eic39u$489$2@sea.gmane.org>

alf wrote:

> I need to find all modules/lib from the site-packages along with the 
> versions. Is there a way to determine physical path to the module?
> 
> And is there is a way to identify all potential "importable" modules?

maybe this could be a start?

http://online.effbot.org/2006_10_01_archive.htm#listmodules-cgi
    http://svn.effbot.python-hosting.com/stuff/sandbox/cgi/listmodules.cgi
(this works as a local script too)

</F>



From icebergwtf at yahoo.com.cn  Fri Nov  3 01:03:40 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Fri, 3 Nov 2006 14:03:40 +0800 (CST)
Subject: Make all files extension lower by a given directory name
Message-ID: <20061103060340.1559.qmail@web15011.mail.cnb.yahoo.com>

Tim Chase wrote:
> Having a win32 program take case-sensitive filenames is a bit 
> odd, given that the OS is case-agnostic...however, that doesn't 
> preclude bad programming on the part of your tool-maker.  Alas.
>
> Thus, to accomodate the lousy programming of your tool's maker, I 
> proffer this:
>
> I've found that Win32 doesn't often take a rename if the origin 
> and destination differ only in case[*].  Thus, to change the 
> case, I've had to do *two* renames...one to, say, prefix with an 
> underscore and change the case to my desired case, and then one 
> to strip off the leading underscore.  You might try a similar 
> song-and-dance to strong-arm Windows into specifying the case of 
> the file.  Something like this (untested) code:
> 
>    filename = "Spanish Inquisition.TGA"
>    name, ext = splitext(filename)
>    intermediate = "_" + name + ext.lower()
>    rename(filename, intermediate)
>    rename(intermediate, intermediate[1:])
>
> And then I'd wrap this contrived abomination in plenty of 
> comments so that folks coming back to it understand why you're 
> using three lines to do what "should" be just
>
>    rename(filename, name + ext.lower())
>
> as would be the "right" way to rename the file with a lowercase 
> version of its extension.
>
> Yes, it's an odd filename choice there which you might not have 
> expected...nobody expects the Spanish Inquisition...
>
> -tkc
>
> [*] Have had problems with this both in Explorer and at the 
> command prompt.

Yes, that's tool maker's fault. I think he used string compare in his code with
case-sensitive (coded in c#, btw).

I started study python about a month, so I hope my problem not bother you :)
Anyway, I realize python is an amazing language and a power tool, thank you.

wutiefeng
2006-11-03


		
___________________________________________________________ 
??????-3.5G???20M?? 
http://cn.mail.yahoo.com/


From Leo.Kislov at gmail.com  Tue Nov 21 04:41:45 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 21 Nov 2006 01:41:45 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
	<4561515B.4060106@v.loewis.de>
	<1164046257.736569.267090@j44g2000cwa.googlegroups.com>
	<45623696.90504@v.loewis.de>
Message-ID: <1164102105.330879.137300@b28g2000cwb.googlegroups.com>

Martin v. L?wis wrote:
> Ross Ridge schrieb:
> > Ross Ridge schrieb:
> >> That would conflict with private use characters appearing in file
> >> names.
> >
> > Martin v. L?wis wrote:
> >> Not necessarily: they could get escaped.
> >
> > How?
>
> Suppose I use U+E001..U+E0FF as the PUA characters for unencodable
> bytes; U+E000 wouldn't be needed since it \0 cannot be part of
> a file name in POSIX.
>
> Then I would use U+E000 for escaping. Each PUA character in the
> listed file name would get escaped with U+E000 in the Python
> string; when the file name is converted back to the system, it
> gets unescaped.
>
> Notice that I think this is a really unrealistic case - I expect
> that all file names containing PUA characters were deliberately
> crafted to investigate using PUA characters in file names.

How will it interoperate with non-python world? Will these file names
ever escape python process?

Unicode consortium thinks "safe" utf-8 is a bad idea:

http://www.mail-archive.com/unicode at unicode.org/msg27241.html

[Lars Kristan]
> Which could be understood as "a proposal to amend UTF-8 to allow invalid
> sequences".

[Kenneth Whistler, Technical Director, The Unicode Consortium]
O.k., and as pointed out already, that simply won't fly. *Nobody*
in the UTC or WG2 is going to go for that. It would destroy
UTF-8, not fix it.
---------------------------------

Kenneth Whistler on invalid file names:
http://www.mail-archive.com/unicode at unicode.org/msg27225.html


And also: http://www.mail-archive.com/unicode at unicode.org/msg27167.html

[Lars Kristan]
> Should all
> filenames that do not conform to UTF-8 be declared invalid?

[Doug Ewell, the guy behind Unicode Technical Note #14]
If you have a UTF-8 file system, yes.
--------------------------------------------------------------

  -- Leo



From writetosrj at gmail.com  Thu Nov  9 02:38:17 2006
From: writetosrj at gmail.com (srj)
Date: 8 Nov 2006 23:38:17 -0800
Subject: which is a good imaging lib in python??
Message-ID: <1163057897.010765.46780@h48g2000cwc.googlegroups.com>

hi
can any1 tell me which is a good imaging lib in python and where i can
get it (2 dwnld) from??

regds



From fredrik at pythonware.com  Sat Nov 11 19:25:53 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 01:25:53 +0100
Subject: reduce to be removed?
In-Reply-To: <1163290526.013063.245130@m7g2000cwm.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
Message-ID: <ej5pme$oe9$2@sea.gmane.org>

Dustan wrote:

>>  > Because I'm embedding this expression in a list comprehension
>>
>> because?
 >
> Because I thought I would be able to get an answer without revealing
> the exact details of what I am doing.

alright, let's try again: why do you need a self-contained reduce 
replacement that can be embedded inside a list comprehension ?

</F>



From webmaster at cacradicalgrace.org  Mon Nov 20 14:32:16 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Mon, 20 Nov 2006 12:32:16 -0700
Subject: remove a list from a list
References: <mailman.356.1163788191.32031.python-list@python.org>
Message-ID: <ejt040$qra$1@aioe.server.aioe.org>

Rares Vernica wrote:
> Hi,
> 
> I have the following problem:
> 
> I have a list like
>   e = ['a', 'b', 'e']
> and another list like
>   l = ['A', 'a', 'c', 'D', 'E']
> I would like to remove from l all the elements that appear in e
> case-insensitive. That is, the result would be
>   r = ['c', 'D']
> 
> What is a *nice* way of doing it?
> 
> Thanks a lot,
> Ray
> 

if you can guarantee that e will always be made up of lowercase letters,
then you can do the following:

r = [ x for x in l if x.lower() not in e ]

Cheers,
Cliff


From paul at boddie.org.uk  Sun Nov 12 09:45:01 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Nov 2006 06:45:01 -0800
Subject: Python Parallel Paradigm
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<4556246a$0$326$e4fe514c@news.xs4all.nl>
	<1163276885.609160.163090@h54g2000cwb.googlegroups.com>
	<vCJIsbAOLlVFNwjs@alma-services.abel.co.uk>
Message-ID: <1163342701.819347.203110@i42g2000cwa.googlegroups.com>

Sandy wrote:
>
>     A higher-level system of concurrency, not based on monitors and
> locks and great programmer discipline, will ultimately require making
> "Python 3000" a reality.

It would surprise me if Python 3000 introduced anything substantially
more than what Python 2.x provides in the area of concurrency.

>     In the meantime, is there anywhere, or any thing, that discusses the
> various concurrency options related to Python?  There's Stackless Python
> (which I can't make head or tail of; I have been unable to find any
> lucid overview, or genuine explanation of the purpose of the design.)

What about this introduction...?

http://members.verizon.net/olsongt/stackless/why_stackless.html

>  I know that there's a package for an Erlang system for Python, somewhere
> ("Parnassus" probably).  There's probably a Py-CSP somewhere too.  Lots
> of trees, but where's the Wood?

Here are some fairly similar projects in Python:

http://kamaelia.sourceforge.net/
 - a way of making general concurrency easy to work with, and fun

http://candygram.sourceforge.net/
 - a Python implementation of Erlang concurrency primitives

http://www.python.org/pypi/parallel
 - process forking and channel-based communication (using pickles)

>     Where are concurrency/distributed models compared and discussed?

In the following article and comments there are some opinions expressed
on Python concurrency (along with the usual dose of Ruby vapourware
promotion):

http://www.oreillynet.com/onlamp/blog/2005/10/does_python_have_a_concurrency.html

Meanwhile, the topic has been discussed on python-dev:

http://mail.python.org/pipermail/python-dev/2005-September/056801.html

That discussion led to a description of something which isn't so far
from parallel/pprocess, at least:

http://mail.python.org/pipermail/python-dev/2005-September/056829.html

Other searching yielded this interesting paper about PyPy and "hardware
transactional memory":

http://portal.acm.org/citation.cfm?id=1176617.1176758&coll=ACM&dl=ACM&type=series&idx=1176617&part=Proceedings&WantType=Proceedings&title=Conference%20on%20Object%20Oriented%20Programming%20Systems%20Languages%20and%20Applications&CFID=15151515&CFTOKEN=6184618

Paul



From mail at microcorp.co.za  Sat Nov  4 00:09:15 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 4 Nov 2006 07:09:15 +0200
Subject: Is there a way to define a true global across modules?
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik>
	<eifpam$6on$1@sea.gmane.org>
Message-ID: <002801c6ffcf$608cef40$03000080@hendrik>

 "Fredrik Lundh" <fredrik at pythonware.com> wrote:


> Hendrik van Rooyen wrote:
>
> > I am struggling with this - I want to define a "system-wide" flag for use as
a
> > semaphore.
>
> http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm
>
> </F>

Thanks - just like COBOL's data division *grin*

- Hendrik



From paul at boddie.org.uk  Fri Nov 10 20:50:25 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Nov 2006 17:50:25 -0800
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2igj$826$1@sea.gmane.org>
	<4554D416.70408@hobbshouse.org> <ej2pa2$vpq$1@sea.gmane.org>
	<4554ECBF.7040603@hobbshouse.org>
	<mailman.2076.1163205410.11739.python-list@python.org>
Message-ID: <1163209825.072410.203090@k70g2000cwa.googlegroups.com>

Ron Adam wrote:
>
> PS.  Rather than shav of on character her and ther in pythons programing
> languag, Lets remov all the silent leters from the english languag. That will
> sav thousands mor kestroks over a few yers.

How about changing Python to support keywords and identifiers employing
the Initial Teaching Alphabet?

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

;-)

Paul



From mail at microcorp.co.za  Sat Nov  4 00:25:48 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 4 Nov 2006 07:25:48 +0200
Subject: Is there a way to define a true global across modules?
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik><mailman.1718.1162569941.11739.python-list@python.org>
	<eifus3$b9o$1@news.albasani.net>
Message-ID: <006601c6ffd1$b038d480$03000080@hendrik>

"robert" <no-spam at no-spam-no-spam.invalid> wrote:


> Fredrik Lundh wrote:
> > Hendrik van Rooyen wrote:
> >
> >> I am struggling with this - I want to define a "system-wide" flag for
> >> use as a
> >> semaphore.
> >
> >
http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm
> >
>
> Or worse style - if you are too lazy to create a extra global variables module
(ab)use the __main__ module als "global":
>
>
> import __main__
>
> __main__.mysemphore += 1
>
>
> -robert

Thanks - how could you possibly have guessed that I am lazy - does it show that
much?  *WEG*

- Hendrik



From bignose+hates-spam at benfinney.id.au  Wed Nov  8 07:23:29 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 08 Nov 2006 23:23:29 +1100
Subject: for x in... x remains global
References: <dfc90$4551c444$544abc47$21060@news.hispeed.ch>
Message-ID: <87k626m8ji.fsf@benfinney.id.au>

Antoine De Groote <antoine at vo.lu> writes:

> for x in range(3): pass
>
> After this statement is executed x is global variable.

Not exactly. The name 'x' is bound at the scope of the 'for'
statement, and remains bound after the 'for' statement stops, just as
it would be if it was bound in any other statement.

> This seems very unnatural to me and caused me 3 three days of
> debugging because I was unintentionally using x further down in my
> program (typo).

This is, when used intentionally, one of the main useful features of
this behaviour: to determine where an iteration stopped by using the
value bound to the name ('x' in this case) after the iteration
statement.

> I would have thought that variables like this are local to the for
> block.

They're bound at the scope of the 'for' statement. They're available
inside the suite of that statement.

> Is there a reason this is not the case? Maybe there are PEPs or
> something else about the matter that you can point me to?

This message addresses it:

    <URL:http://mail.python.org/pipermail/python-dev/2006-April/064624.html>

A search for the separate terms "python iteration variable scope" will
turn up more.

-- 
 \          "The best way to get information on Usenet is not to ask a |
  `\            question, but to post the wrong information."  -- Aahz |
_o__)                                                                  |
Ben Finney



From fuzzyman at gmail.com  Wed Nov 29 09:41:21 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 29 Nov 2006 06:41:21 -0800
Subject: odict the Ordered Diction 0.2.2
Message-ID: <1164811281.405346.227240@l12g2000cwl.googlegroups.com>

After a break of almost a year there has been an update to `odict the
Ordered Dictionary <http://www.voidspace.org.uk/python/odict.html>`_.

The latest version is 0.2.2, with changes implemented by Nicola Larosa.

Despite over 700 downloads since May (plus 1300 as part of `pythonutils
<http://www.voidspace.org.uk/python/pythonutils.html>`_) there have
been no bug reports, only improvements [#]_. {sm;:-)}

* `Quick Download
<http://www.voidspace.org.uk/cgi-bin/voidspace/downman.py?file=odict.py>`_

What is odict?
==========

**odict** is a pure Python implementation of an ordered dictionary. It
keeps keys in insertion order and allows you to change the order.
Methods (including iteration) that would return members in an arbitrary
order are now ordered.

There is also the `SequenceOrderedDict
<http://www.voidspace.org.uk/python/odict.html#sequenceordereddict>`_
that behaves like a sequence as well as a dictionary. It allows slicing
and the keys, values and items methods are special sequence objects
(which are also callable and so behave as methods too).

What's New ?
==========

Code
-------

Removed the TODO and CHANGELOG sections in the tail docstring (they are
in the docs anyway).

Disabled warnings during tests.

Explicitly disabled tests execution on Python v.2.2 . In addition to
the slicing tests, other ones are failing.

Removed code duplication between the ``__init__`` and the ``update``
methods.

Misc. cleanup.

Also, based on code from `Tim Wegener`_:

- added the ``rename`` method;
- removed a ``has_key`` usage in the ``__setitem__`` method.


Documentation
----------------------

Moved the ISSUES chapter from code's tail docstring to here.

Moved up the `Creating an Ordered Dictionary
<http://www.voidspace.org.uk/python/odict.html#creating-an-ordered-dictionary>`_
chapter.

Added prompts to the code examples and removed the superfluous print
statements (sometimes they were there, sometimes they were not).

Misc. cleanup.

.. [#] So either no-one is using it, or it's really good...



From steve at holdenweb.com  Fri Nov  3 08:21:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Nov 2006 13:21:00 +0000
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <454A4E1D.8030106@vtxmail.ch>
References: <4549FA01.4090706@vtxmail.ch>	<200611021020.31599.inq1ltd@verizon.net>
	<454A4E1D.8030106@vtxmail.ch>
Message-ID: <454B423C.20400@holdenweb.com>

Frederic Rentsch wrote:
> jim-on-linux wrote:
> 
>>Frederic,
>>
>>I've been trying to get back into my package in 
>>the Cheese Shop for over a year. The phone 
>>company changed my e:mail address and to make a 
>>long and frustrating story short I can't get back 
>>into the Cheese Shop to make changes to my file.
>>
>>Time is money.  At some time you have to consider 
>>if it is worth it.  At least you have the name of 
>>your program listed.
>>
>>I wish I could be more helpfull. I'll watch the 
>>responses you get from others.
>>
>>Good Luck,
>>jim-on-linux
>>
>>http://www.inqvista.com
>>
>>
>>
>>
>>
>>
>>On Thursday 02 November 2006 09:00, you wrote:
>>  
>>
>>>Some time ago I had managed to upload a small
>>>package to the Cheese Shop using the data entry
>>>template. Uploading is in two steps: first the
>>>text then the package file. When I had a new
>>>version it went like this: The new text made a
>>>new page, but the new file went to the old
>>>    
>>
>>snip
>>  
> 
> 
> 
> Thanks for letting me know that I am not alone. Do you know of an 
> alternative to the Cheese Shop?
> 
Surely the correct answer to this problem is to get the Cheese Shop 
fixed, not to migrate away from it? To whom (besides this list) have you 
communicated the problem, and with what results?

Remember that python.org is run by volunteers, but they are mostly 
highly capable volunteers. This is probably just a change situation that 
wasn't anticipated in the design (we all make mistakes).

A simple change of email address could probably be achieved by tweaking 
the data for one or two individuals, and an automated solution should 
clearly be added as volumes build up.

For now, how about a link that causes someone to receive email? I'd be 
surprised if this couldn't be used to handle low-volume changes with 
adequate security.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From cjw at sympatico.ca  Tue Nov  7 22:14:02 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 07 Nov 2006 22:14:02 -0500
Subject: __init__ function problem
In-Reply-To: <1162929803.735097.279460@i42g2000cwa.googlegroups.com>
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
	<1162929803.735097.279460@i42g2000cwa.googlegroups.com>
Message-ID: <eiri24$tht$1@sea.gmane.org>

Carl Banks wrote:
> kelin,zzf818 at gmail.com wrote:
>> It says the __init__ is called immediately after an instance of the
>> class is created. What dose "immediately" mean?
>> And what is difference between the init method and the constructor in
>> Java?
> 
> For all intents and purposes, __init__ is a constructor.  It isn't
> technically, but you use it exactly the same way you use constructors
> in C++ and Java (well, acutally, Python __init__ is a quite bit more
> flexible, though also less convenient in many cases).  Don't worry that
> it isn't called a constructor.
> 
> In Python, the real constructor is called __new__, but you shouldn't
> use __new__ like C++ and Java constructors.  Usually there's no reason
> to use __new__ at all.  (The main use case is to return something other
> than a newly created object, such as a preallocated or cached object.
> For your normally functioning classes, you should use __init__.)
numpy.ndarray is an exception.  There, one must call __new__, or a 
factory function which does the same thing.

Colin W.
> 
> 
> Carl Banks
> 



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov  2 08:10:55 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 03 Nov 2006 00:10:55 +1100
Subject: best way to check if a file exists?
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
	<mailman.1597.1162389697.11739.python-list@python.org>
	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>
	<mailman.1606.1162392331.11739.python-list@python.org>
Message-ID: <pan.2006.11.02.13.10.54.293471@REMOVE.THIS.cybersource.com.au>

On Thu, 02 Nov 2006 01:44:25 +1100, Ben Finney wrote:

> "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
> 
>> Ben Finney wrote:
>> > "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
>> > > You could try to read the file, if that fails it doesn't exist:
>> >
>> > Except that there are other conditions than "File doesn't exist"
>> > that can cause an 'open' to fail.
>>
>> Ok, true. You can test explicit on non existence as follows, and then
>> decide to open the file
> 
> Or you can simply use 'os.path.exists', as has been suggested several
> times in this thread.

But there can be a race condition between os.path.exists returning True
and you trying to open the file, if some other process deletes or renames
the file in the meantime.



-- 
Steven.



From fredrik at pythonware.com  Sat Nov 18 01:51:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 07:51:19 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <455E5C61.5030502@v.loewis.de>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>	<455CED78.1060604@v.loewis.de>	<bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>	<455CF4BA.1050608@v.loewis.de>	<1163759435.551233.76030@j44g2000cwa.googlegroups.com>
	<455E5C61.5030502@v.loewis.de>
Message-ID: <ejmah7$okt$1@sea.gmane.org>

Martin v. L?wis wrote:

>> How about returning two lists, first list contains unicode names, the
>> second list contains undecodable names:
>>
>> files, troublesome = os.listdir(separate_errors=True)
>>
>> and make separate_errors=True by default in python 3.0 ?
> 
> That would be quite an incompatible change, no?

it also violates a fundamental design rule for the standard library.

</F>



From juho.schultz at pp.inet.fi  Fri Nov 17 08:38:36 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 17 Nov 2006 05:38:36 -0800
Subject: String Replace only if whole word?
In-Reply-To: <mailman.336.1163767918.32031.python-list@python.org>
References: <mailman.336.1163767918.32031.python-list@python.org>
Message-ID: <1163770716.864547.10460@k70g2000cwa.googlegroups.com>

Michael Yanowitz wrote:
> Hello:
>
>   I am hoping someone knows if there is an easier way to do this or someone
> already implemented something that does this, rather than reinventing the
> wheel:
>   I have been using the string.replace(from_string, to_string, len(string))
> to replace names in a file with their IP address.
>   For example, I have definitions file, that looks something like:
> 10.1.3.4   LANDING_GEAR
> 20.11.222.4   ALTIMETER_100
> 172.18.50.138 SIB
> 172.18.50.138 LAPTOP
> 172.18.51.32  WIN2000
> 127.0.0.1 LOCALHOST
>
>   and I have a text file (a Python script) that has these names in the file.
> In most cases the string.replace() command works great. But there is one
> instance which it fails:
> Suppose I had in the file:
>  if (LAPTOP_IS_UP()):
>    It would replace the string with:
>  if ("172.18.50.138"_IS_UP()):
>
>    Is there any easy way to avoid this, only replace if a whole word
> matches?
> I probably need something which determines when a word ends, and I will
> define
>  a word as containing only 'A'-'Z','a'-'z','0'-'9','_' . As long as the
> string
> contains more of the word digits after the match, don't replace?
>
> Thanks in advance:
> Michael Yanowitz

You need regular expressions for this. Use the re module.
http://docs.python.org/lib/module-re.html

from the docs:

re.sub(pattern, repl, string[, count])
Return the string obtained by replacing the leftmost non-overlapping
occurrences of pattern in string by the replacement repl.

Your pattern would be "[^A-Za-z0-9_]word[^A-Za-z0-9_]"

[^xy] is approximately not in ('x', 'y')

-- 
Juho Schultz



From paul at boddie.org.uk  Fri Nov 10 15:33:11 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Nov 2006 12:33:11 -0800
Subject: newbie: minidom
References: <if25h.664$mZ5.553@tornado.fastwebnet.it>
Message-ID: <1163190791.312285.26230@h54g2000cwb.googlegroups.com>

Danny Scalenotti wrote:
> I'm not able to get out of this .......
>
>
> from  xml.dom.minidom import getDOMImplementation
>
> impl = getDOMImplementation()  // default UTF-8
> doc = impl.createDocument(None, "test",None)
> root = doc.documentElement

Here, you're actually getting a reference to the root "test" element at
the top of the document.

> root.setAttribute('myattrib', '5')
>
> print root.toxml()

Here, you're serialising the root "test" element, not the whole
document.

> I obtain
>
> <test myattrib="5"/>

...which is the expected result.

> why not this?
>
> <?xml version="1.0" encoding="UTF-8"?>
> <test myattrib="5"/>

Because you need to do this:

print doc.toxml()

Paul



From do-not-reply at by-mail.com  Fri Nov 17 05:12:41 2006
From: do-not-reply at by-mail.com (Johan von Boisman)
Date: Fri, 17 Nov 2006 11:12:41 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <ejjtd1$8gp$1@upsn250.cri.u-psud.fr>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<ejjtd1$8gp$1@upsn250.cri.u-psud.fr>
Message-ID: <ejk1up$1mf$1@wake.carmen.se>

Laurent Pointal wrote:
> gabor a ?crit :
>> hi,
>>
>> from the documentation (http://docs.python.org/lib/os-file-dir.html) for
>> os.listdir:
>>
>> "On Windows NT/2k/XP and Unix, if path is a Unicode object, the result
>> will be a list of Unicode objects."
> 
> Maybe, for each filename, you can test if it is an unicode string, and
> if not, convert it to unicode using the encoding indicated by
> sys.getfilesystemencoding().
> 
> Have a try.
> 
> A+
> 
> Laurent.

Strange coincident, as I was wrestling with this problem only yesterday.

I found this most illuminating discussion on the topic with 
contributions from Mr L?vis and others:

http://www.thescripts.com/forum/thread41954.html

/johan


From u2567446 at anu.edu.au  Mon Nov 27 19:33:07 2006
From: u2567446 at anu.edu.au (Thuan Seah Tan)
Date: Tue, 28 Nov 2006 11:33:07 +1100
Subject: Python script and C++
Message-ID: <456b83c7$1@clarion.carno.net.au>

Hi all,

    I am new to python  and currently I am working on a traffic simulation 
which I plan to define the various agents using scripting. It's kind of like 
scripting for non-playable character in games. I am thinking of using python 
for this but I am concerned with running time. Is scripting a lot slower 
compared to direct implementation in C++? Does compiling the script help in 
any way? Also, can anyone recommend me a book that covers python in general 
as well as C++ binding? Thanks.


Thuan Seah Tan 




From bdesth.quelquechose at free.quelquepart.fr  Thu Nov 23 17:31:51 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 23 Nov 2006 23:31:51 +0100
Subject: Trying to understand Python objects
In-Reply-To: <mailman.654.1164313894.32031.python-list@python.org>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>	<mailman.564.1164158130.32031.python-list@python.org>	<ek4e6j$hfn$1@panix3.panix.com>	<4565f8f7$0$8460$426a74cc@news.free.fr>
	<mailman.654.1164313894.32031.python-list@python.org>
Message-ID: <45661c32$0$28568$426a74cc@news.free.fr>

Fredrik Lundh a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Don't see it as a religious point please, but I fail to understand why 
>> you seem so in love with old-style classes ? 
(snip)
> 
> to pick a few reasons: the old-style/new-style distinction is com-
> pletely irrelevant for people new to the language,

Until they try to use properties...



From kaushalshriyan at gmail.com  Mon Nov  6 06:12:34 2006
From: kaushalshriyan at gmail.com (kaushal)
Date: 6 Nov 2006 03:12:34 -0800
Subject: Learning Python
In-Reply-To: <mailman.1801.1162806869.11739.python-list@python.org>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
	<1162805615.944184.138050@h48g2000cwc.googlegroups.com>
	<mailman.1801.1162806869.11739.python-list@python.org>
Message-ID: <1162811554.731349.145980@h48g2000cwc.googlegroups.com>

On Nov 6, 2:54 pm, "Jorge Vargas" <jorge.var... at gmail.com> wrote:
> On 6 Nov 2006 01:33:36 -0800, ArdPy <ard... at gmail.com> wrote:
>
>
>
> > kaushal wrote:
> > > Hi
>
> > > How do i start Learning Python,is there any reference material which I
> > > can refer since I dont have
> > > any programming experience
>
> > > Thanks and Regards
>
> > > Kaushal
>
> > Hi kaushal,
>
> > Look intohttp://diveintopython.org. Dive into python is a really
> > readable ebook...enjoyEven though that's a great book I don't recomend it for non
> programmers I think thishttp://docs.python.org/tut/is a better way
> to start
>
> also I'll suggest you start learning other programming languaje before
> python or else this will be the only one you will code :)
>
> > --
> >http://mail.python.org/mailman/listinfo/python-list

Hi

Just wanted to know how is this URL
http://www.ibiblio.org/obp/thinkCSpy/ 

Thanks and Regards

Kaushal



From agriff at tin.it  Mon Nov  6 16:09:49 2006
From: agriff at tin.it (Andrea Griffini)
Date: Mon, 06 Nov 2006 22:09:49 +0100
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162846564.782883.259110@h54g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
Message-ID: <454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>

John Machin wrote:

> The fact that C3 and C2 are both present, plus the fact that one
> non-ASCII byte has morphoploded into 4 bytes indicate a double whammy.

Indeed...

 >>> x = u"f?dselsdag"
 >>> x.encode('utf-8').decode('iso-8859-1').encode('utf-8')
'f\xc3\x83\xc2\xb8dselsdag'

Andrea


From cbarbez at gmail.com  Sat Nov 11 05:51:05 2006
From: cbarbez at gmail.com (DarkPearl)
Date: 11 Nov 2006 02:51:05 -0800
Subject: service windows avec py2exe
In-Reply-To: <mailman.2072.1163197099.11739.python-list@python.org>
References: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
	<mailman.2072.1163197099.11739.python-list@python.org>
Message-ID: <1163242265.307783.122230@f16g2000cwb.googlegroups.com>

I found the function which starts the error

**********************************
class Win32ProcessUsage:
    def __init__(self):
        self.lstProcess=[]
        self.WMIService =
win32com.client.GetObject(r"winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")
        self.reset()
    def reset(self):
        self.lstProcess=[]
        lstTmp = self.WMIService.ExecQuery('Select * from
Win32_Process')
        for item in lstTmp:

self.lstProcess.append(tuple([item.Name,item.CommandLine,item.Status,item.ProcessId,item.ParentProcessId]))

    def get_usage(self):
        return self.lstProcess
**********************************

it is a class which allows to obtain the list of the processes who run.

With python interpreter, this class functions very well but , when it
turns in service, it starts the error :

The instance's SvcRun() method failed
<Error getting traceback - traceback.print_tb() failed
<class 'pywintypes.com_error'>: (-2147221020, 'Syntaxe incorrecte',
None, None)

Why ???



From fredrik at pythonware.com  Thu Nov  2 01:48:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 07:48:32 +0100
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <eic3gt$63u$1@sea.gmane.org>
References: <eib0la$86i$1@newslocal.mitre.org>	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>	<1162434526.601605.315560@k70g2000cwa.googlegroups.com>
	<eic3gt$63u$1@sea.gmane.org>
Message-ID: <eic4bv$7uc$1@sea.gmane.org>

Fredrik Lundh wrote:

> if you're wrapping some cmd.exe command in an internal API, it's usually 
> easier to call "os.path.normpath" the last thing you do before you call 
> "os.system", than to get all the backslashes right in your code.
> 
> also see:
> 
> http://www.effbot.org/pyfaq/why-can-t-raw-strings-r-strings-end-with-a-backslash.htm

and as just I pointed out in a comment on that page, getting the slashes 
right doesn't help you with spaces in filenames.  to write reliable code 
for os.system, you want something like:

import os.path
import subprocess

def mysystem(command, *files):
     files = map(os.path.normpath, files)
     files = subprocess.list2cmdline(files)
     return os.system(command + " " + files)

mysystem("more", "/program files/subversion/readme.txt")

but then you might as well use subprocess.call, of course.

</F>



From fredrik at pythonware.com  Tue Nov 14 06:40:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:40:37 +0100
Subject: Using signal.alarm to terminate a thread
In-Reply-To: <slrnelj996.paq.nick@irishsea.home.craig-wood.com>
References: <12lgk7h55lu0vb4@corp.supernews.com>	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>	<12lj35aqa9drd8a@corp.supernews.com>
	<slrnelj996.paq.nick@irishsea.home.craig-wood.com>
Message-ID: <ejc9vj$d5$1@sea.gmane.org>

Nick Craig-Wood wrote:

>   The only sensible things you can do from a signal handler is set a
>   global flag, or call sem_post on a semaphore, to record the delivery
>   of the signal. The remainder of the program can then either poll the
>   global flag, or use sem_wait() and sem_trywait() on the semaphore.

but that's exactly what Python's signal handlers do, right ?

(the interpreter uses a "pending call" queue to collect events, and 
executes them from the interpreter main loop in a controlled fashion).

</F>



From ironfroggy at gmail.com  Wed Nov 29 21:26:40 2006
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Wed, 29 Nov 2006 21:26:40 -0500
Subject: How to detect what type a variable is?
In-Reply-To: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
Message-ID: <76fd5acf0611291826k4ada9725qfd0dea46b1c66c40@mail.gmail.com>

On 29 Nov 2006 07:36:26 -0800, Leandro Ardissone <lardissone at gmail.com> wrote:
> Hi,
>
> I want to know what type is a variable.
> For example, I get the contents of an xml but some content is a list or
> a string, and I need to know what type it is.
>
> Thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

In nearly all cases where someone asks this question, the situation
turns out to not call for it at all. Usually you simply aren't
thinking in the language you are using properly. You should usually
know what you are dealing with. If you don't, then either the
different types of objects you might have should be interchangable or
you should create a situation where you dont have such an ambiguality.
Perhaps you could change the design such that you always have a list,
even if its just a list of a single string.

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From fdu.xiaojf at gmail.com  Mon Nov  6 20:41:29 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Tue, 07 Nov 2006 09:41:29 +0800
Subject: sound process moduls in python ?
Message-ID: <454FE449.3090204@gmail.com>

Hi,

When I was talking with my friend, I wanted to share the music I'm 
listening with
my friend. I mean, I wanted my friend to hear my music and my own sound .

I order to achieve this, I think I need to append the output of my sound 
card to
the input of the sound card.

My questions:

1. Is my idea possible ?

2. Which sound processing module is capable to do this ? The module 
should at least
available at Windows platform.

Thanks !

xiaojf


From boris.smirnov at gmail.com  Thu Nov  9 10:45:25 2006
From: boris.smirnov at gmail.com (boris.smirnov at gmail.com)
Date: 9 Nov 2006 07:45:25 -0800
Subject: extract text from a string
Message-ID: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>

Hallo all,

I have tried for a couple of hours to solve my problem with re but I
have no success.

I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
code of how to extract this text from that string?

thank you very much in advance
regards,
boris



From mike$#at^&nospam!%trauschus  Fri Nov  3 21:20:56 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 03 Nov 2006 21:20:56 -0500
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <o9mdnZQHN4lE99bYnZ2dnUVZ_q6dnZ2d@comcast.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
	<o9mdnZQHN4lE99bYnZ2dnUVZ_q6dnZ2d@comcast.com>
Message-ID: <0cedncli_d2UZNbYnZ2dnUVZ_sGdnZ2d@comcast.com>

Larry Bates wrote:
>
> MS ships ODBC interface to xBase databases in all versions of Windows.
> You don't need Access.  Just create DSN to your exported dBase database
> and MS Word, MS Excel, and any other ODBC aware product can read the
> data.  If the data size is large or if you want to move to server, you
> can do that later.
> 

Oh!  I hadn't realized that Win32 ODBC handled connections to dBase
files.  Learn something new every day... :-)  Thanks!

(I suppose that is something that I would probably know, if I used
Windows...)

	-- Mike


From nulla.epistola at web.de  Sun Nov 19 11:59:49 2006
From: nulla.epistola at web.de (Hertha Steck)
Date: Sun, 19 Nov 2006 17:59:49 +0100
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.19.16.59.35.983108@web.de>

Am Sat, 18 Nov 2006 23:24:08 -0800 schrieb John (Z R) L:

> Hi all, I am very new to programming, and I chose to study the Python
> language before C++. I am currently using the Wikibooks
> "Non-Programmer's Tutorial for Python", and am up to the section "Who
> goes there"?
> 
> http://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python/Who_Goes_There%3F
> 
> But after clicking "run module" for
> "
> a = 1
> print a
> a = a + 1
> print a
> a = a * 2
> print a "
> 
> The results "1, 2, 4" didn't appear on the GUI screen, in fact nothing
> did. And I clicked twice again, this time, it exited the Python GUI
> program. I tried to enter back in, but it would quickly display
> 
> "1
> 2
> 4"
> 
> before exiting immediately within half a second. How do I stop the this
> exiting from occurring.
> 

All of this using IDLE as your GUI (not PythonWin and not the python
interpreter by itself), right?

You did all this as explained at the start of the tutorial: open a "New
window", type the code into this empty window, save it to a reasonable
place and then click "Run / Run module". Right? (Silly question: there is
no run menu in the interactive window. On the other hand, you never know.)

What about the examples before this one, did you type, save and run them
just like this one? And did they work as you expected?

What version of Python and of IDLE do you use?

If you have PythonWin (it's part of ActiveState Python, for example): what
happens, if you run your script using that? What happens if you open a
command window, go to the right directory and run your script from there?
(Don't try to start it by double clicking in the explorer: it will run,
but the window will close immediately afterwards, and you won't see
anything.)

> Another problem I have is firewall. On my old computer (Windows 98)
> when using Python GUI, it can't run modules because of some firewall.
> But I thought firewalls were for internet sites only?! How do I fix
> this??
> 

Do you mean this?

    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************

This shouldn't keep any script from running. What exactly happens if you
try? 


From pwatson at redlinepy.com  Sat Nov 11 11:00:20 2006
From: pwatson at redlinepy.com (Paul Watson)
Date: Sat, 11 Nov 2006 10:00:20 -0600
Subject: newbie: minidom
In-Reply-To: <mailman.2053.1163184761.11739.python-list@python.org>
References: <if25h.664$mZ5.553@tornado.fastwebnet.it>
	<mailman.2053.1163184761.11739.python-list@python.org>
Message-ID: <4555F394.80802@redlinepy.com>

Fredrik Lundh wrote:
> Danny Scalenotti wrote:
> 
>> I'm not able to get out of this .......
>>
>> from  xml.dom.minidom import getDOMImplementation
>>
>> impl = getDOMImplementation()  // default UTF-8
>> doc = impl.createDocument(None, "test",None)
>> root = doc.documentElement
>> root.setAttribute('myattrib', '5')
>>
>> print root.toxml()
>>
>>
>> I obtain
>>
>> <test myattrib="5"/>
>>
>> why not this?
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <test myattrib="5"/>
> 
> 
> why?  the documents are equivalent, and any XML application that 
> requires an explicit UTF-8 encoding declaration is broken.
> 
> </F>

Explicit is better than implicit.


From cemerick at snowtide.com  Sun Nov 19 10:08:38 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Sun, 19 Nov 2006 10:08:38 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejpr8v$54p$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<mailman.408.1163844581.32031.python-list@python.org>
	<1163941421.235619.150260@f16g2000cwb.googlegroups.com>
	<ejpr8v$54p$1@sea.gmane.org>
Message-ID: <6EBAFB85-4942-4C80-8BB4-8360583A3525@snowtide.com>

On Nov 19, 2006, at 9:55 AM, Fredrik Lundh wrote:

>> And oh by the way, this thread is all about *your* customer's
>> complaining.
>
> from what I can tell, it was *your* customer posting FUD about a
> different library, not my customer asking for help with a specific
> problem.  this is free software; people who use a piece of software
> count a *lot* more than people who don't want to use it.

Holy hell Fredrik -- I hadn't even *downloaded* 4suite before I  
posted my original question.  I've tried to be nice, tried to be  
complimentary, and tried to be diplomatic, so it would be nice if  
*everyone* would stop casting aspersions or otherwise speculating  
about my intentions.  Flame amongst yourselves, but leave me out of it.

- Chas


From carsten at uniqsys.com  Tue Nov 14 10:44:38 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 14 Nov 2006 10:44:38 -0500
Subject: Noob | datetime question
In-Reply-To: <77895c1d0611140733y1ab3d28dr8e542d51438a2cc@mail.gmail.com>
References: <136ED738BD4F1545B97E4AC06FF6370734BFB6@DMSP-MSG-EVS01.mail.pvt>
	<77895c1d0611140733y1ab3d28dr8e542d51438a2cc@mail.gmail.com>
Message-ID: <1163519078.3353.22.camel@dot.uniqsys.com>

On Tue, 2006-11-14 at 09:33 -0600, Kevin Kelley wrote:
> import time
> FORMAT='%Y%m%d'
> 
> time.strftime(FORMAT,time.gmtime(time.time()+8380800))
> output = '20070219'

While the above works, the following variation using datetime is more
readable:

>>> import datetime
>>> someday = datetime.date.today() + datetime.timedelta(days=97)
>>> print someday.strftime("%Y%m%d")
20070219

-Carsten




From deets at nospam.web.de  Wed Nov  1 15:32:07 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 01 Nov 2006 21:32:07 +0100
Subject: scared about refrences...
In-Reply-To: <1162412436.595926.66940@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
Message-ID: <4qsei4Foo2f6U1@uni-berlin.de>

SpreadTooThin schrieb:
> Bruno Desthuilliers wrote:
>> Nick Vatamaniuc a ?crit :
>> (snip)
>>> In  Python all the primitives are copied and all other entities are
>>> references.
>> Plain wrong. There's no "primitives" (ie : primitive data types) in
>> Python, only objects. And they all get passed the same way.
> 
> so..
> def fn(x):
>    x = x + 1
>    print x
> 
> a = 2
> fn(a)
> fn(2)
> 
> Wouldn't you say that this is being passed by value rather than by
> refrence?

It appears so, but it still is a truth - all objects, even the numbers, 
are objects. No copying.

Diez


From pydecker at gmail.com  Sat Nov  4 11:47:09 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sat, 4 Nov 2006 11:47:09 -0500
Subject: python GUIs comparison (want)
In-Reply-To: <1162657420.655675.185930@e3g2000cwe.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
Message-ID: <ca55a9900611040847n280cc9b0o467c0ec679ab2fa4@mail.gmail.com>

On 4 Nov 2006 08:23:40 -0800, Mudcat <mnations at gmail.com> wrote:

> I have been using Tkinter for several years now. Recently I have been
> thinking about switching to something else that may have a sharper
> appearance. However I'm not sure what that may be, and if that
> something else is *that* much better than what I'm already using.
>
> Does everyone agree that wxPython looks best on Windows? I've also read
> in a couple of places where Dabo looks pretty good as well.

Dabo uses wxPython, so it looks exactly the same. The difference is in
the coding: writing stuff in wxPython is like writing C++ code, while
creating GUIs in Dabo is like writing Python code. Dabo also has a lot
of tools for creating GUIs visually, but even if you don't use those,
Dabo is a huge improvement over raw wxPython.

-- 

# p.d.


From usenet1 at anton.e4ward.com  Tue Nov  7 10:18:52 2006
From: usenet1 at anton.e4ward.com (Anton81)
Date: Tue, 07 Nov 2006 16:18:52 +0100
Subject: __div__ not recognized automatically
References: <eicmj4$sak$1@gwdu112.gwdg.de> <eid0n3$5ko$03$1@news.t-online.com>
Message-ID: <eiq84s$11h$1@gwdu112.gwdg.de>

> If you have the
> 
> from __future__ import division
> 
> statement, you need to override __truediv__(), not __div__()

That worked after I also added
from __future__ import division
to all other modules I created.

Is it possible that there appears an inconsistency if the division is
imported in only some of the modules?

Anton


From __peter__ at web.de  Thu Nov  9 08:29:44 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Nov 2006 14:29:44 +0100
Subject: newbie class-building question
References: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
Message-ID: <eivafo$ecs$02$1@news.t-online.com>

jrpfinch wrote:

> I am constructing a simple class to make sure I understand how classes
> work in Python (see below this paragraph).
> 
> It works as expected, except the __add__ redefinition.  I get the
> following in the Python interpreter:
> 
>>>> a=myListSub()
>>>> a
> []
>>>> a+[5]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: 'str' object is not callable
>>>>
> 
> Please could you let me know where I am going wrong.  I have hacked
> around with the code and tried googling this error message but am
> having difficulty finding the source of the problem.


> class myList:
>     def __init__ (self,value=[]):
>         self.wrapped=[]
>         for x in value :
>             self.wrapped.append(x)
>     def __repr__ (self):
>         return `self.wrapped`
>     def __getattr__ (self,attrib):
>         return getattr(self.wrapped,attrib,'attribute not found')

When Python is looking for an attribute that neither exists in myList nor
the 'wrapped' list, you give back a string.
In your case this happens for the __coerce__() method, and the interpreter
ends up calling "attribute not found" which of course must fail. The
solution:

- Don't provide a bogus default for getattr(), and get a traceback that is
  easier to understand.
- Use new-style classes (i.e. class myList(object): ...) which look for
  special methods in the class, not the instance.


Peter



From dlenski at gmail.com  Thu Nov  9 16:01:51 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 13:01:51 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <slrnel6vs2.17k.wojciech_mula@cat.tac>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<slrnel6vs2.17k.wojciech_mula@cat.tac>
Message-ID: <1163106111.916021.103880@b28g2000cwb.googlegroups.com>

Wojciech Mula wrote:
> Nick Craig-Wood wrote:
> >>  It's very mature, full-featured, and portable, and fairly easy to
> >>  learn as well.
> >
> > ...with native look and feel on each platform unlike GTK / TK
>
> AFAIK Tk 8 uses platform's native widgets.
>
> w.

Tk 8.4 appears to use native Win32 widgets under Cygwin and native
WinXP.  But it definitely doesn't use GTK widgets under Ubuntu with
Gnome desktop.  Is there a way to get it to do so?

Dan



From steve at holdenweb.com  Fri Nov 10 16:06:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 15:06:26 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <2006111015340116807-jameshcunningham@gmailcom>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net>	<4rk5giFrerjfU1@mid.individual.net>
	<2006111015340116807-jameshcunningham@gmailcom>
Message-ID: <ej2pi9$tq$1@sea.gmane.org>

James Cunningham wrote:
> On 2006-11-10 15:24:50 -0500, Bjoern Schliessmann 
> <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> said:
> 
>> Marc 'BlackJack' Rintsch wrote:
>>
>>> No it doesn't -- look again at the example given above.  It's
>>> legal syntax in Python but doesn't have the semantics implied by
>>> the example.
>> Sorry, I don't understand -- what is the difference between the
>> example as it is and the implied semantics of it?
>>
>> Regards,
>>
>>
>> Bj?rn
> 
> Yes, I'm not sure myself.
> 
> In [1]: color = "red"
> 
> In [2]: if color == "red" or "blue" or "green":
>    ...:     print 'Works.'
>    ...:
>    ...:
> Works.
> 
> In [3]: if color == "blue" or "red" or "green":
>    ...:     print 'Works.'
>    ...:
>    ...:
> Works.
> 
> In [4]: if not color == "blue" or "green":
>    ...:     print 'Works.'
>    ...:
>    ...:
> Works.
> 
Try testing a little more completely:

  >>> for color in ('blue', 'red', 'green', 'yellow'):
  ...   if color == 'blue' or 'red' or 'green':
  ...     print color, "compares true"
  ...   else:
  ...     print color, "compares false"
  ...
blue compares true
red compares true
green compares true
yellow compares true
  >>>

Still think it works?

  >>> print 'yellow' == 'blue' or 'red' or 'green'
red
  >>> print 'blue' == 'blue' or 'red' or 'green'
True
  >>>

Now do you understand why it doesn't work? Think "operator precedence".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From skip at pobox.com  Tue Nov 14 10:51:14 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 14 Nov 2006 09:51:14 -0600
Subject: Random image text generation?
In-Reply-To: <7xslgmxo94.fsf@ruckus.brouhaha.com>
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
	<7xslgmxo94.fsf@ruckus.brouhaha.com>
Message-ID: <17753.58866.541188.422704@montanaro.dyndns.org>

>>>>> "Paul" == Paul Rubin <"http://phr.cx"@NOSPAM.invalid> writes:

    Paul> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
    >> Instead of displaying an obfuscated image of a nonsense word, display
    >> six randomly chosen photos, where five are of the same thing but not
    >> the same image. E.g. you might show five different kittens and a
    >> horse. The user has to click on the image that is not the same as the
    >> others.  State-of-the-art horse-recognition software is not yet in
    >> widespread use by spammers *wink*

    Paul> No need to recognize the horse.  Just pick one of the pictures at
    Paul> random and you'll get the right one 1/6th of the time.  Repeat ad
    Paul> infinitum--they're spammers and like to repeat stuff after all.
    Paul> That's why those conventional captcha images make you recognize a
    Paul> multi-character string: so the guessing chance is low.

Actually, the ones I saw that used a set of "one of these things is not like
the other" images gave you a pop-up menu of maybe 100-200 words.  The user
needed to choose the name of the different object from that list.  That
makes it a bit harded to guess.  Of course, these sorts of tests suffer from
the same shortcoming as the randomly generated string.  Visually impaired
people have trouble with it.

I finally settled on just reusing the SpamBayes engine to detect/reject spam
submissions.

Skip


From dhable at gmail.com  Fri Nov 10 15:30:57 2006
From: dhable at gmail.com (dhable at gmail.com)
Date: 10 Nov 2006 12:30:57 -0800
Subject: Modules, Packages and Developer Confusion. Oh My!
Message-ID: <1163190657.792705.55030@m73g2000cwd.googlegroups.com>

I think I'm still missing something in how python is handling packages
and it's mixing me up. I have a package with three files (modules?)
like so:

OPS:\
  __init__.py
  model.py
  search.py

To hide more details of the package structure, I import model and
search inside of __init__. It also seemed like a good idea to define a
global function that creates a database connection and I added it to
__init__.py. Thus, I have:


from model import *
from search import *

def create_connection():
  # details are unimportant for this example


When I try to use the create_connection function in model, I get errors
when I use it as a global function ( just create_connection()). The
only way to resolve the error was to import OPS inside of model and use
OPS.create_connection(). This doesn't seem natural. If model is part of
OPS, why do I need to tell python to import OPS and use this function
from OPS? I can see doing that from the outside world, but inside?

Any clarification would be greatly appreciated.



From fredrik at pythonware.com  Thu Nov 30 13:31:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 30 Nov 2006 19:31:33 +0100
Subject: Trying to understand rfc822.Message() behaviour
In-Reply-To: <1164910937.624693.315950@l12g2000cwl.googlegroups.com>
References: <1164910937.624693.315950@l12g2000cwl.googlegroups.com>
Message-ID: <ekn824$jon$1@sea.gmane.org>

Phoe6 wrote:

> Have  a look at this snippet, I have a file direct.txt and I want to
> read it as rfc8222.Message() so that I get the Subject: and Mood: as
> Dict Keys and content separately, but I am unable to get the Content
> Properly.
> 
>>>> fhandle = open('direct.txt','r')
>>>> print fhandle.read()
> Subject: testing - fortune
> Mood: happy
> 
> 
>   "Why should we subsidize intellectual curiosity?"
>   - Ronald Reagan
> 
> 
>>>> fhandle.seek(0)
>>>> import rfc822
>>>> message = rfc822.Message(fhandle)
>>>> print message
> Subject: testing - fortune
> Mood: happy
> 
> 
> What is happening here. Why is the message not coming up?

because the rfc822.Message parser only reads the header; to read the 
rest, just call "read" on the file object after you've parsed the header.

see

     http://effbot.org/librarybook/rfc822.htm

for some sample code.

</F>



From lycka at carmen.se  Thu Nov  2 07:04:27 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Nov 2006 13:04:27 +0100
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
Message-ID: <eicmsb$d9g$1@wake.carmen.se>

Snor wrote:
> I'm attempting to create a lobby & game server for a multiplayer game,
> and have hit a problem early on with the server design. I am stuck
> between using a threaded server, and using an event driven server. I've
> been told time and time again that I should use an event driven server
> design (that is, use twisted).
[snip]
> Is the only solution to use a threaded server to let my clients make
> their requests and receive a response in the fastest possible time?

You got a lot of long-winded replies, but the short reply is that
Twisted has packaged solutions for this. See 
http://twistedmatrix.com/projects/core/enterprise

  "Twisted provides an interface to any Python DB-API 2.0 compliant 
database through an asynchronous interface which allows database 
connections to be used, and multiplexed by multiple threads, while still 
remaining thread-safe for use with Twisted's event-based main loop. 
Twisted Enterprise provides these services by leveraging Twisted 
Internet's utilities for managing thread pools and asynchronous 
programming."


From irmen.NOSPAM at xs4all.nl  Sun Nov  5 07:25:45 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 05 Nov 2006 13:25:45 +0100
Subject: Pyro stability
In-Reply-To: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
Message-ID: <454dd84b$0$328$e4fe514c@news.xs4all.nl>

writeson wrote:
[some questions about Pyro]

I've replied to this on Pyro's mailing list.
-Irmen


From DustanGroups at gmail.com  Sat Nov 11 19:15:26 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 16:15:26 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2118.1163289463.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
Message-ID: <1163290526.013063.245130@m7g2000cwm.googlegroups.com>


Fredrik Lundh wrote:
> Dustan wrote:
>
>  > Because I'm embedding this expression in a list comprehension
>
> because?
>
> </F>

Because I thought I would be able to get an answer without revealing
the exact details of what I am doing. I didn't realize that wasn't an
option. I'll try once more to give you an idea of what I'm trying to
accomplish without letting on the details.

>>> foo =\
[[[1,2,3],[4,5,6],[7,8,9]],
 [[3,2,1],[6,5,4],[9,8,7]]]

Here, foo appears to be a 3-dimensional list - except it's supposed to
be 2-dimensional. The inner-list-of-lists is a result of how I'm
producing the data, and now I want to do a mass-concatenation (or
extending) of the inner-list-of-lists, and come up with this:

>>> foo == [[1,2,3,4,5,6,7,8,9],[3,2,1,6,5,4,9,8,7]]
True

What's the best way to accomplish this?

It's not quite this simple, but let's just see what you can come up
with the information at hand, and I'll see if I can adapt it to my
needs.



From joel.hedlund at gmail.com  Sat Nov 11 06:32:52 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Sat, 11 Nov 2006 12:32:52 +0100
Subject: import parser does not import parser.py in same dir on win
Message-ID: <ej4c0j$3qe$1@news.lysator.liu.se>

Hi!

I have a possibly dumb question about imports. I've written two python 
modules:

parser.py
------------------------------------
class Parser(object):
     "my parser"
------------------------------------

app.py
------------------------------------
from parser import Parser
print "import successful"
------------------------------------

Running app.py on linux, gives:
------------------------------------
import succesful
------------------------------------

However, runnning it on windows gives:
------------------------------------
Traceback (most recent call last):
   File "test.py", line 1, in ?
     from parser import Parser
ImportError: cannot import name Parser
------------------------------------

It turns out that on Windows, the builtin parser module is imported 
instead. Why? Why is there a difference? What other names are "taken"?

In both cases the script dir is first on sys.path, and I'm using the 
plain old terminal/cmd window.

Thanks for your time.

Cheers!
/Joel Hedlund


From sjmachin at lexicon.net  Sun Nov 26 05:00:09 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 02:00:09 -0800
Subject: search versus match in re module
In-Reply-To: <1164528934.695210.220500@j44g2000cwa.googlegroups.com>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
	<7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
	<mailman.719.1164470313.32031.python-list@python.org>
	<tv1ah.3127$ql2.930@newsread3.news.pas.earthlink.net>
	<mailman.729.1164515380.32031.python-list@python.org>
	<1164528934.695210.220500@j44g2000cwa.googlegroups.com>
Message-ID: <1164535209.879458.119180@h54g2000cwb.googlegroups.com>

John Machin wrote:
[snip]
> 2. Then realise that your test is equivalent to
>
> if not line.startswith('^From '):

Whoops!

That '^From ' (and all later ones) should have been 'From '

(the perils of over-hasty copy/paste)

The timings are, if anything, a tiny bit faster than before.

Cheers,
John



From irmen.NOSPAM at xs4all.nl  Wed Nov  8 19:11:36 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 09 Nov 2006 01:11:36 +0100
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <87slgt1vmh.fsf@gmail.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>	<eistaq$m7u$1@panix3.panix.com>	<mailman.1907.1163003856.11739.python-list@python.org>	<eitahh$nov$1@panix3.panix.com>	<mailman.1928.1163016034.11739.python-list@python.org>
	<87slgt1vmh.fsf@gmail.com>
Message-ID: <4552723b$0$323$e4fe514c@news.xs4all.nl>

Jorge Godoy wrote:
> Cliff Wells <cliff at develix.com> writes:
> 
>> I think this sums up my point of view as well (although I would have
>> used around 3215 more words to say it). 
> 
> Hmmmm...  Putting this on the discussion of the week: you'd have used
> range(3215) or xrange(3215) more words?  ;-)
> 

Actually I've just replaced a loop in Pyro from using range to using
xrange because of memory issue when you wanted to run it nearly
indefinitely.

So there. Finally back on the original subject ;-)


Thanks for the praise about Pyro but yeah, I would have been
equally happy if it was put without using the f word :)

Cheers

--Irmen.


From saptarshi.guha at gmail.com  Wed Nov  8 23:27:01 2006
From: saptarshi.guha at gmail.com (sapsi)
Date: 8 Nov 2006 20:27:01 -0800
Subject: Using Python from Cocoa App via PyObjc - numbers dont match...
In-Reply-To: <1163042247.489957@nfs-db1.segnet.com>
References: <1163035378.654266.287360@m73g2000cwd.googlegroups.com>
	<1163042247.489957@nfs-db1.segnet.com>
Message-ID: <1163046421.638588.222350@i42g2000cwa.googlegroups.com>

Hi,
Well not a complaint as such but a question. Thank you for the response
however and the link. I have seen it before but never got around to
reading it...

Further to this, if i was writing a python module and  c function and
suppose the python module and the c  function called each other back
and forth exchanging results from float calculations  - would not the
results then become flawed? How would one pass floats between different
languages - using special purpose data structures understood by both
the python module and c code?

I asked this question without reading the link, so if it stinks of
ignorance please forget it.

Thank you
Saptarshi


Michael Ash wrote:
> In comp.lang.objective-c sapsi <saptarshi.guha at gmail.com> wrote:
> > The first output in the console is 40.4 and the second
> > -40.40000152587891.
> >
> > If i change the NSLog(s)  to "%f",[n floatValue] (and the second
> > likewise) the first is 40.400002 and the second is -40.400002.
>
> I assume you are complaining about the fact that it's not printing exactly
> 40.4, and wondering where the error is coming from. (It helps if you
> actually state this yourself, so we don't have to assume it, rather than
> just laying out the circumstances.)
>
> The answer is that floating point numbers are inherently imprecise. Read
> through this essential resource:
>
> http://docs.sun.com/source/806-3568/ncg_goldberg.html
> 
> -- 
> Michael Ash
> Rogue Amoeba Software



From fredrik at pythonware.com  Thu Nov 23 06:05:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 12:05:07 +0100
Subject: How do I separate my parameters with spawnv
In-Reply-To: <mn.bacc7d6b8e71c7ac.21770@NOSPAMchelly.net>
References: <mn.bacc7d6b8e71c7ac.21770@NOSPAMchelly.net>
Message-ID: <ek3v94$8lm$3@sea.gmane.org>

Fabio Chelly wrote:

> But when I try to use os.spawnv to excute it from my python code, it 
> doesn't work at all. Here is my code:
> 
> exe = "c:\\curl.exe"
> f = "c:\\upload.txt"
> logon = "login:pwd"
> url = "ftp://ftp-myurl"
> import os
> os.spawnv(os.P_WAIT, exe, ["-T", f, "-u", logon, url, "--ftp-ssl"])

iirc, spawnv expects an argv-style list, with the program name as the 
first argument.  try writing the above as

os.spawnv(os.P_WAIT, exe, [exe, "-T", f, "-u", logon, url, "--ftp-ssl"])

> Does anyone know How I can execute my command line in python?

the subprocess module is usually much nicer for things like this.

</F>



From johnjsal at gmail.com  Thu Nov  2 15:50:04 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 12:50:04 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <eidlah$v0m$01$1@news.t-online.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
Message-ID: <1162500604.198685.97710@i42g2000cwa.googlegroups.com>


Peter Otten wrote:


> ...the above is not a 1-tuple, but an ordinary string. You forgot the
> trailing comma:
> 
> ('notes',)

Right you are! Now it works! :)

Thanks!



From arkanes at gmail.com  Tue Nov 21 13:56:25 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Nov 2006 12:56:25 -0600
Subject: How good is CORBA?
In-Reply-To: <45634A59.5080501@wiggly.org>
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
	<45634A59.5080501@wiggly.org>
Message-ID: <4866bea60611211056r6e1e514cw5798c24674f6c685@mail.gmail.com>

On 11/21/06, Nigel Rantor <wiggly at wiggly.org> wrote:
> Sai Krishna M wrote:
> > Hi everybody,
> >
> > i have been developing web based applications using python+cheetah.
> >
> > The numbers are increasing. The applications have many common parts of
> > code. Though these applications are separate from each other they are
> > run in the same server.
> >
> > I heard about CORBA... but also heard that it has some flaws...like
> > the programming being very complicated.
> > Also heard that CORBA is no more used these days...
> >
> > Can someone suggest me a better option or is corba fine?
>
> This is an extremely loaded question and you're liable to get many
> differing opinions.
>
> What follows is just my opinion, I don't want to get into any religious
> wars.
>
> CORBA is a large, complex system that allows you to do object-RPC
> efficiently and in many different languages.
>
> Web services are now converging on the same solutions as the OMG did
> with CORBA because they are solving the same problems.
>
> If you need to access someone else's services then web services with
> XML-RPC/SOAP/REST is probably a great idea.
>
> If you have any kind of need for performance, or if all of your
> interfaces are internal then I would choose CORBA.
>
> I am currently building a system with a mixture of CORBA/SOAP interfaces
> because of these trade-offs.
>
> If you don't like CORBA, but want to do efficient object-RPC and don't
> mind paying for it then perhaps look at Ice from www.zeroc.com, they're
> a bunch of good guys who were big CORBA people and decided to go make an
> object-RPC mechanism without the cruft that CORBA gathered.
>

FYI: Ice is available under the GPL, so if by "pay" you mean "pay
money" that's not your only option. You can also get a commercial
license, similiar to Qt.

I like Ice a lot, it's got hardly any of the ramp up time and learning
curve that CORBA does, and it's extremely efficent. If GPL or cash are
acceptable licensing options to you, then I encourage you to use it
before you head to CORBA.

> Despite the fact that some very bad decisions were made about what to
> include in CORBA you don't *have* to use any of the braindead features.
>
> If you have any more specific questions then let me know, this is just
> my quick 0.02c
>
> Regards,
>
>    n
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From ytlim1 at gmail.com  Fri Nov 17 07:37:03 2006
From: ytlim1 at gmail.com (Why Tea)
Date: 17 Nov 2006 04:37:03 -0800
Subject: What python modules are available?
In-Reply-To: <mailman.334.1163766357.32031.python-list@python.org>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
	<mailman.334.1163766357.32031.python-list@python.org>
Message-ID: <1163767023.599564.260920@m7g2000cwm.googlegroups.com>


> http://svn.effbot.python-hosting.com/pydotorg/listmodules/listmodules.py

Thanks. The script worked nicely.

> > I tried to import numarray, but python couldn't find it.
>
> numarray isn't a standard module; see the library reference for a list
> of modules that you can expect to be available on most platforms (but
> make sure you check the page for the modules you're interested in, to

All I need is something to provide me with array features. I can't
remember why I chose to use numarray a while ago...



From sjmachin at lexicon.net  Thu Nov 30 19:26:09 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 16:26:09 -0800
Subject: String formatters with variable argument length
References: <mailman.905.1164931966.32031.python-list@python.org>
Message-ID: <1164932769.210948.289560@f1g2000cwa.googlegroups.com>

Fredrik Tolf wrote:
> I've been trying to get the string formatting operator (%) to work with
> more arguments than the format string requires, but I can find no way to
> do that. For example:
>
> >>> "%i" % 10
> '10'
> >>> "i" % 10
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: not all arguments converted during string formatting
>
> The thing is, I want to get format strings from the user, and I don't
> want to require the user to consume all the arguments. docs.python.org
> doesn't seem to have any clues on how to achieve this, and I can't think
> of what to google for.
>
> Could it be as I fear, that it is impossible?
>

Three approaches spring to mind. In descending order of my preference:

(a) don't do that

(b) parse the format string, counting the number of args required. If
the user has supplied more, throw them away.

(c) wrap your execution of format_string % args in a try/except
bracket. If you get a TypeError with that message [not guaranteed to
remain constant in the future], throw away the last arg and go around
again.

As a matter of curiosity, why don't you want the user to consume all
the arguments? Don't they get even a teensy-weensy warning message? Are
you writing a Perl interpreter in Python?

Cheers,
John



From apardon at forel.vub.ac.be  Mon Nov 13 05:27:05 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Nov 2006 10:27:05 GMT
Subject: str.title question after '
Message-ID: <slrnelgi3p.r7i.apardon@rcpc42.vub.ac.be>

I have a text in ascii. I use the ' for an apostroph. The problem is
this gives problems with the title method.  I don't want letters
after a ' to be uppercased. Here are some examples:

   argument       result          expected

  't smidje       'T Smidje       't Smidje
  na'ama          Na'Ama          Na'ama
  al pi tnu'at    Al Pi Tnu'At    Al Pi Tnu'at


Is there an easy way to get what I want?

Should the current behaviour condidered a bug?
My would be inclined to answer yes, but that may be
because this behaviour would be wrong in Dutch. I'm
not so sure about english.

-- 
Antoon Pardon


From ak at silmarill.org  Thu Nov  2 16:18:59 2006
From: ak at silmarill.org (Rainy)
Date: 2 Nov 2006 13:18:59 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <1162501702.150119.313860@f16g2000cwb.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>
	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>
Message-ID: <1162502339.755106.126640@e3g2000cwe.googlegroups.com>


JohnJSal wrote:
> JohnJSal wrote:
> > Peter Otten wrote:
> >
> >
> > > ...the above is not a 1-tuple, but an ordinary string. You forgot the
> > > trailing comma:
> > >
> > > ('notes',)
> >
> > Right you are! Now it works! :)
> >
> > Thanks!
>
> Oh great, now I've moved on to another issue. It seems that the list
> appending isn't working right. All that gets added to a list is the
> last value, not everything. Am I doing something wrong with the append
> method?

Well, append method is for appending a value to a list. A single value.
You can use extend method (iirc) to extend a list with another list.



From mrosenstihl at macnews.de  Thu Nov 30 12:39:16 2006
From: mrosenstihl at macnews.de (Markus Rosenstihl)
Date: Thu, 30 Nov 2006 18:39:16 +0100
Subject: failure building python 2.5 on mac os x 10.3.9
References: <mailman.462.1163947820.32031.python-list@python.org>
Message-ID: <ekn503$1q1$1@lnx107.hrz.tu-darmstadt.de>

On 2006-11-19 15:50:14 +0100, Thomas Ploch <Thomas.Ploch at gmx.net> said:

> Hello,
> 
> I followed the instructions in the Mac/README file.
> 
> I ran ./configure --enable-framework
> 
> But when I try to build from source with gcc 4.0.2, following happens:
> 
> 
> [snip]
> libtool: can't locate file for: -lSystemStubs
> libtool: file: -lSystemStubs is not an object file (not allowed in a
> library)
> make: *** [Python.framework/Versions/2.5/Python] Error 1
> 
> What does that mean?
> 
> Thanks,
> Thomas

I had the same problem (why do you have gcc-4.0.2?).

-lSystemStubs is in Tiger


First of all, try to install the 10.4 SDK as it will keep you away of a 
lot of linking problems and such stuff. (yes, it will install on 10.3.9 
and since then i had no compile problems, i found this as an answer in 
a post in the apple discussions)

Then try to compile it again after you have deleted the python source 
tree (or "make clean").
If that is still not working you have to edit the Makefile from Python 
and remove the -lSystemStubs
(i think both ways work, but i am not sure)

Make sure you have either a patched readline 5.1 or better a readline 
5.2. Otherwise you will get segmentation faults when you are using 
ipython.


If it is still not working,
Good luck!




From no-spam at no-spam-no-spam.invalid  Sun Nov  5 12:39:59 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 05 Nov 2006 18:39:59 +0100
Subject: socket.error.__bases__ = (EnvironmentError,) ?
Message-ID: <eil7lg$t91$1@news.albasani.net>

I've often trouble catching IO errors in general. Now a frequent case everywhere in an app after I've added a defaultsockettimout.
Is this a legal/right practice to change the Exception tree like this:

socket.error.__bases__ = (EnvironmentError,)

And is there a chance that in future there is a common base exception class (EnvironmentError or an new super class) for these kind of exceptions (socket, httplib, ftplib, ...)


-robert


From researchbase at gmail.com  Sat Nov 18 13:22:07 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Sat, 18 Nov 2006 23:52:07 +0530
Subject: please help me choose a proper gui library.
In-Reply-To: <200611181807.33571.phil@riverbankcomputing.co.uk>
References: <f81479dd0611180944h6916db1bs47ec2e05b4a2a399@mail.gmail.com>
	<200611181807.33571.phil@riverbankcomputing.co.uk>
Message-ID: <f81479dd0611181022h2ff6f51ejc0ea4f6e9a1634d4@mail.gmail.com>

On 18/11/06, Phil Thompson <phil at riverbankcomputing.co.uk> wrote:

> You have to install Qt first. You only need to install the run-time elements
> (ie. the DLLs) on the client's machine. Unless your application is licensed
> under the GPL (and you are using the GPL version of Qt and PyQt) then there
> are components of Qt that you must not install on the client's machine.
Yes, the software is licensed under gpl.  how do I determine what
run-time elements I need to install on the clien'ts machine and what
is supposed to  be skipped?

> The only binary installer provided is for the GPL version of PyQt. Qt has
> separate installers. It's easy enough to use something like NSIS to create
> your own installer for your application that includes everything that it
> needs.
that's exactly what I am planning, only need to figure out what all do
I need to package apart from the application executable.  by the way I
will be using cx_freze for creating executables.  so I hope I will not
require to also ship the PYQT modules?
> PyQt fully supports Python 2.5.
but my problem is that I will only be able to use python 2.4, is that
ok?  the PYQT installer asks "you seam to have a version older than
python25, would you still like to continue?"  is it safe to do so?  I
did not find a gpl binary for PYQT that is made for python24.  please
give the URL if possible.
> Google for the different ones and try them out.
which is the best editor which I can consider simple, does auto
indentation and has some kind of auto completion features?  it is ok
if I don't get a gui designer.
> In addition to your application you need to distribute the Qt DLLs (and
> plugins if you use them), the corresponding PyQt .pyd files and sip.pyd. If
> you are using the GPL version of Qt then you may also need to consider the
> MinGW DLLs. Finally you need to consider if you need to distribute Python
> itself.
>
> You might like to look at tools like PyInstaller for creating single
> executables.
this is all confusing for me right now.  can you please give me any
links possible for having a binary qt installer that will also install
dlls required by PYQT?
and how will I be able to determine what dll files and what other
components I will need to ship with my installer?
thanks.
Krishnakant.


From mauriceling at acm.org  Thu Nov 16 03:55:18 2006
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 16 Nov 2006 08:55:18 GMT
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
Message-ID: <455c2773$1@news.unimelb.edu.au>

Dennis Lee Bieber wrote:

> On Wed, 15 Nov 2006 22:41:19 GMT, Maurice LING <mauriceling at acm.org>
> declaimed the following in comp.lang.python:
> 
> 
>>I'm hoping for a more optimistic outcome that this may open a 
>>possibility for tigher interoperability between java programs and python 
>>programs. That is, run java class files or java codes natively on python 
>>VM. Is this still a blue sky dream?
>>
> 
> 	Most unlikely to happen... I don't really see anyone going to the
> effort to change the javac back-end to target a totally different
> runtime engine. 

I admit that it is very very unlikely. I guess it is just a wild dream 
of mine to run Java bytecodes and Python bytecodes on Python VM. I do 
have a wild vision that we can import java libraries (as jar files) into 
CPython.


ML


From sjmachin at lexicon.net  Sun Nov 12 04:14:13 2006
From: sjmachin at lexicon.net (John Machin)
Date: 12 Nov 2006 01:14:13 -0800
Subject: Decimal() instead of float?
In-Reply-To: <pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
Message-ID: <1163322853.760315.51040@k70g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> On Sun, 12 Nov 2006 02:31:04 +0100, Fredrik Lundh wrote:
>
> >> For example, I have a ZIP code
> >> database that can do some processing on its numbers, and the numbers are
> >> stored as floating point values (exactly) but Python doesn't get them
> >> right
> >
> > sounds odd.  are you sure you don't mean "stored as strings containing
> > decimal numbers" ?
> >
> > (who uses fractional ZIP codes, btw?)
>
> Well, I can't speak for Americans, but here in Australia we typically give
> our post codes to six decimal places:
>
> Melbourne 3000.000000
> Brunswick 3056.000000
> Clifton Hill 3068.000000
> Sydney 2000.000000
> St Johns Park 2176.000000
>
> and so forth. You can't have too much precision with those floating point
> post/ZIP codes!

Here in Austraila, (I expect this is common to most countries), there
are people who are utterly clueless about elementary data model rules,
like identification "numbers" should be kept as strings.

E.g. (1) National grief started over twenty years ago when the Post
Office started using postcodes with leading zeroes, and continues to
the present. The postcode for Darwin can be stored as 800, "800", or
"0800".

E.g. (2) Many Australians have a Tax File Number (TFN) which is a
9-digit number with an "officially kept secret" check digit algorithm
(you need to sign an NDA with the Tax Office). Storing this as an
integer allows the TFN be negative -- if the data entry for say
123456789 is actually 123456789-, you don't check for anything (length,
allowable characters, check digit) and an old-fashioned
trailing-minus-allowed conversion-to-integer routine is used.

Cheers,
John



From fredrik at pythonware.com  Mon Nov 27 04:50:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Nov 2006 10:50:33 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <200611271133.48359.mgiann@beta-cae.gr>
References: <200611261804.54669.mgiann@beta-cae.gr>	<ekcgov$lu1$1@sea.gmane.org>
	<200611271133.48359.mgiann@beta-cae.gr>
Message-ID: <ekecd9$e8c$1@sea.gmane.org>

Michalis Giannakidis wrote:

>> in general, methods on C objects are implemented in terms of operations
>> on the internal data structures, not in terms of a subset of the methods
>> already provided by the object.
> 
> But what is the reason that the assignment 
> l[2] = 6 
> call my function, but
> l.append(3) 

"obj[index] = value" maps to "obj.__setitem__(index, value)".  reading 
the documentation might help; start here:

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

</F>



From uche.ogbuji at gmail.com  Sat Nov 18 02:44:51 2006
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: 17 Nov 2006 23:44:51 -0800
Subject: newbie: minidom
In-Reply-To: <4555F394.80802@redlinepy.com>
References: <if25h.664$mZ5.553@tornado.fastwebnet.it>
	<mailman.2053.1163184761.11739.python-list@python.org>
	<4555F394.80802@redlinepy.com>
Message-ID: <1163835891.744530.320360@j44g2000cwa.googlegroups.com>

Paul Watson wrote:
> Explicit [XML declaration] is better than implicit.

Yes indeed.

"Always use an XML declaration"
http://www-128.ibm.com/developerworks/xml/library/x-tipdecl.html

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From mensanator at aol.com  Fri Nov 17 12:48:24 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 17 Nov 2006 09:48:24 -0800
Subject: determining the bounds of a tuple returned from a database
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
	<1163744646.708954.271010@f16g2000cwb.googlegroups.com>
	<mailman.308.1163746322.32031.python-list@python.org>
	<1163746899.262327.72100@h48g2000cwc.googlegroups.com>
Message-ID: <1163785704.361588.113640@m73g2000cwd.googlegroups.com>


ronrsr wrote:
> very sorry, that was my error - len(result[0]) and len(result[1]) both
> return 1 --
>
> i think I'm misunderstanding what len() does - to me they appear to
> have 2 or 3 elements, or at least be composed of a string of some
> length.

One string composed of multiple data elements means
the problem is in your database design, not in your Python code.

>
> I guess len() isn't the function i'm looking for then.  How do I tell
> how many strings, or how many bytes are in each dimension?

You have to split the strings based on some delimiter, but your
delimiters seem inconsistent. Unless the different delimiters actually
have different meanings which, again, implies bad database design.

> so that I
> can iterate through them.
>
> Each entry in that list is a keyword - Alternately, is there any fast
> way to parse that into a sorted list of distinct keywords.

That could easily be done in the database itself, but only if it is
designed properly.

>
> very sorry for the error.
>
> bests,
>
> -rsr-
>
> Fredrik Lundh wrote:
> > ronrsr wrote:
> >
> > > it looks like the  len() function is the one I want.
> > >
> > > for:   len(result) - i get 248,
> > >
> > > but for len(result[0]) or len(result[1]) i always get 0.
> >
> > that's a bit surprising, because both items are tuples that contain
> > exactly one item:
> >
> > >> (('Agricultural subsidies; Foreign aid',), ('Agriculture; Sustainable
> > >> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> > >> Development, Birth Defects; Toxic Chemicals',),
> > 
> > </F>



From Bulkan at gmail.com  Wed Nov  8 01:18:52 2006
From: Bulkan at gmail.com (placid)
Date: 7 Nov 2006 22:18:52 -0800
Subject: Python memory usage
In-Reply-To: <mailman.1878.1162965364.11739.python-list@python.org>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<mailman.1878.1162965364.11739.python-list@python.org>
Message-ID: <1162966732.195837.83280@i42g2000cwa.googlegroups.com>


William Heymann wrote:
> On Tuesday 07 November 2006 22:42, placid wrote:
> > Hi All,
> >
> > Just wondering when i run the following code;
> >
> > for i in range(1000000):
> >      print i
> >
> > the memory usage of Python spikes and when the range(..) block finishes
> > execution the memory usage does not drop down. Is there a way of
> > freeing this memory that range(..) allocated?
> >
> > I found this document but the fix seems too complicated.
> >
> > http://www.python.org/pycon/2005/papers/79/python-memory.pdf
> >
> > Cheers
>
> Change range to xrange. It will run faster and use up almost no memory by
> comparison. I know the point you are getting at for releasing memory however
> in this case there is no reason to allocate the memory to begin with.

Thanks for that it has fixed some of the memory problems.  Just
wondering if i continuously create different BeautifulSoup objects
within a xrange() block when does the memory get released for this
object, after the xrange() block, the next iteration of the xrange()
block ?

Cheers



From grahamjfeeley at optusnet.com.au  Sat Nov  4 17:09:52 2006
From: grahamjfeeley at optusnet.com.au (Graham Feeley)
Date: Sun, 5 Nov 2006 08:09:52 +1000
Subject: WebScraping
Message-ID: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>

Can someone steer me to scripts / modules etc on webscraping please???
Ultimately I would like someone to write a script for me.
However i am still searching for documentation on this subject
Thanks Graham





From ptmcg at austin.rr._bogus_.com  Sat Nov  4 15:04:50 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 04 Nov 2006 20:04:50 GMT
Subject: elementtree terminology + tangential questions
References: <1162655068.276394.287080@m73g2000cwd.googlegroups.com>
Message-ID: <Cn63h.5492$lx6.3166@tornado.texas.rr.com>

<mirandacascade at yahoo.com> wrote in message 
news:1162655068.276394.287080 at m73g2000cwd.googlegroups.com...
> 2) None of the xml documents to which I've had exposure (a very, very
> small set) have had text between an element's end tag and the next tag,
Text elements are not limited to printed/visible text.  If you parsed a 
formatted XML string, I think the indenting whitespace shows up as text 
elements between tags.

-- Paul 




From steve at holdenweb.com  Thu Nov  2 10:22:33 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 15:22:33 +0000
Subject: is mod_python borked?
In-Reply-To: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <eid2dj$aso$1@sea.gmane.org>

walterbyrd wrote:
> I am considering python, instead of php, for web-application
> development. I often see mod_python.criticisized as being borked,
> broken, or just plain sucking.
> 
> Any truth to any of that?
> 
Why don't you ask the very active mod_python mailing list that?

Like all systems mod_python has its limitations, but it has an active 
development community who are extremely responsive to user and developer 
input.

Follow-ups set to gmane.comp.python.mod_python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From sjmachin at lexicon.net  Thu Nov  9 20:27:37 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 17:27:37 -0800
Subject: pack a three byte int
In-Reply-To: <1163120580.762226.22160@k70g2000cwa.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
	<1163115840.190634.5800@m73g2000cwd.googlegroups.com>
	<1163120580.762226.22160@k70g2000cwa.googlegroups.com>
Message-ID: <1163122057.161515.70390@i42g2000cwa.googlegroups.com>


p.lavarre at ieee.org wrote:


>
> Pack '<IH' doesn't match how the code that I'm refactoring thinks about
> these things.
>
> The people who wrote this stuff forty years ago were thinking of bit
> fields - here bit lengths of 8 then 3 then 21 then 8 then 8 bits -
> cheating only when the bit boundaries happened to hit byte boundaries.
>
> Yes, as you describe in this example, I could cheat when the boundaries
> happen to hit H or I boundaries as well, but then I'm still left coping
> with the cases where the fields split on byte boundaries that are not H
> or I boundaries, such as the example:
>
> Am I helping?

Yes, you have *finally* said unambiguously what your problem really is
-- field lengths not a multiple of 8 bits. I suggest that you start a
new thread, write it out logically and ask for assistance. You should
get some sensible answers. I will apologise in advance for not
participating; I'm exhausted.

Cheers,
John



From pavlovevidence at gmail.com  Mon Nov 27 15:25:43 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Nov 2006 12:25:43 -0800
Subject: super() and type()
In-Reply-To: <mailman.777.1164653627.32031.python-list@python.org>
References: <mailman.777.1164653627.32031.python-list@python.org>
Message-ID: <1164659143.759204.127440@l12g2000cwl.googlegroups.com>

Chris Mellon wrote:
> I see super documented, and in use, as below (from the Python documentation)
>
> class C(B):
>     def meth(self, arg):
>         super(C, self).meth(arg)
>
> I'd like to not write C all the time, so is there any problem with writing:
>
> class C(B):
>     def meth(self, arg):
>         super(type(self), self).meth(arg)
>
>
> This seems to work in practice but I don't see it used anywhere and
> I'm worried what I might be missing.
>
> This was especially brought to my attention because pylint flags the
> second usage as invalid, and I'm not sure if it should be considered a
> false positive or not.

PyLint is right.  Try running this:


class A(object):
    def meth(self,arg):
        print "hello"

class B(A):
    def meth(self,arg):
        super(type(self), self).meth(arg)

class C(B):
     def meth(self,arg):
        super(type(self), self).meth(arg)

print C().meth(1)


The reason this type(self) returns the type of the object (which
doesn't change), NOT the type of the class it was defined in.  That is,
type(self) returns C even in the function B.meth.  Since C's superclass
is B, B.meth ends up calling B.meth again, and you get infinite
recursion.

Unfortunately, short of hackery, you're stuck with having to write out
super(C,self).


Carl Banks



From peter.maas at somewhere.com  Sat Nov 11 16:39:37 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Sat, 11 Nov 2006 22:39:37 +0100
Subject: explicit self revisited
Message-ID: <ej5fuv$a4a$1@online.de>

The Python FAQ 1.4.5 gives 3 reasons for explicit self (condensed version):

1. Instance variables can be easily distinguished from local variables.

2. A method from a particular class can be called as
   baseclass.methodname(self, <argument list>).

3. No need for declarations to disambiguate assignments to local/instance
   variables.

All these reasons are valid and retained by the following suggestion: let
self be represented by the dot, e.g. replace

class someTest(unittest.TestCase):
    def setUp(self):
        self.ly = yList()
        self.m1 = self.ly[0].message
        self.m2 = self.ly[1].message
        self.m3 = self.ly[2].message

    def testList(self):
        self.assertEqual(len(self.ly),3)
        self.assertEqual(self.m1),"Ho")
        self.assertEqual(self.m2),"HoHo")
        self.assertEqual(self.m3),"HoHoHo")

by

class x(unittest.TestCase):
    def .setUp():
        .ly = yList()
        .m1 = .ly[0].message
        .m2 = .ly[1].message
        .m3 = .ly[2].message

    def .testList():
        .assertEqual(len(.ly),3)
        .assertEqual(.m1),"Ho")
        .assertEqual(.m2),"HoHo")
        .assertEqual(.m3),"HoHoHo")

Methods could still be referenced e.g. as x.testList(someInstance).
The current self syntax could still be valid (for backward compatibility.)
Advantages of the new syntax:

1. Enhanced readability, less verbosity

2. Unambiguous: no need to tell newbies that a virtuous pythoneer
   has to stick to self instead of abbreviate it as s.

3. One argument less for "Python OO bolted on" propaganda.

The second reason is the most important for me. I consider syntax control
by a code of conduct as lame.

The "leading dot" syntax could have further advantages:

class x(object):
    a = ""  # static variable
    .b = 0  # instance variable

This could replace parameterless __init__ methods. Methods without leading
dots could be considered static without a staticmethod decorator. For
backward compatibility this behaviour should be explicitly activated e.g. by
__autostatic__ = true.

What do you think?

-- 
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From joshbloom at gmail.com  Tue Nov 14 13:52:29 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Tue, 14 Nov 2006 11:52:29 -0700
Subject: Looking for a way to stop execution of script, in the script
In-Reply-To: <ejd30u$3h9$1@sea.gmane.org>
References: <d25b6e9a0611141032q537c4017r8d346489dba9759f@mail.gmail.com>
	<ejd30u$3h9$1@sea.gmane.org>
Message-ID: <d25b6e9a0611141052o4786c4afg75c2714c1066942f@mail.gmail.com>

Thanks Fredrik, yeah the while loop for single run is pretty stupid.

sys.exit() thats the call I was looking for.

-Josh

On 11/14/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> Josh Bloom wrote:
>
> > Hi everyone, I'm looking for a way to stop execution of a script from
> > within the script.
> >
> > I'm familiar with this idiom:
> >
> > While 1:
> >   doFirstThing()
> >   doSecondThing()
> >   if something:
> >     break
> >   doThirdThing()
> >   break
>
> I'm not.  why are you using a while statement to execute the code once?
>
> > doFirstThing()
> > doSecondThing()
> > if something:
> >     die
> > doThirdThing()
>
> sys.exit() ?
>
> (or if you prefer, "raise SystemExit")
>
> </F>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From mail at microcorp.co.za  Tue Nov 14 11:14:03 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Nov 2006 18:14:03 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com><ej2nrk$qea$2@sea.gmane.org>
	<ej3vbg$r81$2@sea.gmane.org><8c7f10c60611130605i382312c4l829d6167ae0a5828@mail.gmail.com><mailman.120.1163491857.32031.python-list@python.org>
	<1163517440.042628.219590@h48g2000cwc.googlegroups.com>
Message-ID: <000201c70876$fc746c80$03000080@hendrik>

"Dan Lenski" <dlenski at gmail.com> wrote:



> I think part of learning to think like a computer is learning to stop
> associating computer logic too strongly with the natural language
> meanings of "and", "or", and "not".

This is true - and you have left out "but"....

- Hendrik




From jseigh_01 at xemaps.com  Tue Nov  7 12:04:03 2006
From: jseigh_01 at xemaps.com (Joe Seigh)
Date: Tue, 07 Nov 2006 12:04:03 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162913881.953664.254960@m73g2000cwd.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
Message-ID: <psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>

Ross Ridge wrote:
> Joe Seigh wrote:
> 
>>Basically there's a race condition where an object containing the
>>refcount can be deleted between the time you load a pointer to
>>the object and the time you increment what used to be a refcount
>>and is possibly something else but definitely undefined.
> 
> 
> That doesn't really make sense.  The object can't be deleted because
> the thread should already have a reference (directly or indirectly) to
> the object, otherwise any access to it can cause the race condition you
> describe.
> 

True but if the thread didn't already have a reference, how would you get
that initial reference to a shared object without a lock?


-- 
Joe Seigh

When you get lemons, you make lemonade.
When you get hardware, you make software. 


From pavlovevidence at gmail.com  Wed Nov 29 10:48:13 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 29 Nov 2006 07:48:13 -0800
Subject: Detecting recursion loops
In-Reply-To: <ekk6qu$po0$1@news.albasani.net>
References: <ekk6qu$po0$1@news.albasani.net>
Message-ID: <1164815293.529674.109850@l39g2000cwd.googlegroups.com>

robert wrote:
> My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
> What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?


1. You could catch RuntimeError at the top, check whether it's
recursion depth exception, and raise a user exception if it is.

2. Consider whether you're unwittingly trying to cover up a bug.  ISTM
no matter how problematic the input is, you should at least be able to
make progress on it.  Are you getting this error because, say, you're
not incrementing a counter somewhere, and thus recalling a function
with the same arguments again?

3. Also consider whether you could rewrite the code to be
non-recursive.  Usually when I process input recursively, the input is
allowed to be arbitrarily deeply nested.  (In that case I think it
would be a mistake to arbitrarily limit depth.)   But it sounds to me
like your input might be inherently non-nestable.  If that's the case,
it might be possible to get rid of the recursion altogether, or at
least to put in error checking that detects when input is at an invalid
depth.

4. If those concerns don't apply, and you do need to detect recursion,
I'd suggest using a global dictionary to track function calls.  If you
have a function parse_something that you want to track, you could
define a dict like this:

_call_count = { parse_something: 0 }

And change parse_something to adjust its own counter:

def parse_something():
    _call_count[parse_something] += 1
    check_invalid_recursion()
    ....
    _call_count[parse_something] -= 1

(You could define a decorator to do this more easily; that's left as an
excercise.)

The check_invalid_recursion() function would inspect _call_count and
raise an exception based on any criteria you want.

5. In CPython, you could just inpect the stack frame and look for
duplicated function calls.  See the documentation for sys._getframe.


Carl Banks



From martin at v.loewis.de  Sat Nov  4 22:20:29 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 05 Nov 2006 04:20:29 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7xpsc33zmh.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
Message-ID: <454d587d$0$4361$9b622d9e@news.freenet.de>

Paul Rubin schrieb:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
>>> PS: Besides: what are speed costs of LOCK INC <mem> ?
>> That very much depends on the implementation. In
>> http://gcc.gnu.org/ml/java/2001-03/msg00132.html
>> Hans Boehm claims it's 15 cycles. 
> 
> I think that has to be on a single processor, or at most a dual core
> processor with shared cache on die.  With multiple cpu chips I don't
> think can get the signals around that fast.

Can you explain what you mean? The lock# signal takes *immediate*
effect, within the CPU cycle in which it is asserted. There is no
delay whatsoever (except for speed-of-light issues, of course).

Regards,
Martin


From mail at microcorp.co.za  Thu Nov  2 04:16:59 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 2 Nov 2006 11:16:59 +0200
Subject: Tkinter Listbox string formatting question - how to kill a
	dancingsnake ?
References: <02a901c6fcbf$181c51a0$03000080@hendrik>
	<ei71k0$tkq$1@sea.gmane.org>
Message-ID: <024301c6fe5f$dca6b960$03000080@hendrik>


"Fredrik Lundh" <fredrik at pythonware.com> wrote:


<lots of stuff to for me to download and read up>


In the meantime, I have produced this evil hack, that takes advantage of the
difference in pixel widths between the space, and either the fullstop or the
single quote...

It will only work if you have quite a lot of space to waste between columns, and
I have only tested it for two sizes of Lucida and Helvetica - and for a fixed
font like courier it seems to do no harm other than the cpu time it wastes...

If the difference in width is one pixel, it lines up the next thing to be added
to the string exactly, else it almost gets it right...

I find the few (up to one less than there are pixels in a space) characters it
adds into the line less visually disturbing than the dancing snake column caused
by the full space width variation.

anyway for what its worth, here it is:

# this does some text padding to try to line variable font stuff up

def pad_text(txt,pixlen,fontp):
    """This does padding up to a pixel value exploiting differences
    between space, fullstop or single quote widths.
    txt is a text string
    pixlen is an int - the number of pixels to "tab" to
    fontp is the font parameter
    """

    a = fontp.measure(txt)
    diff = pixlen - a
    if diff < 0:
        return "string too long too fit in pixels"
    spsize = fontp.measure(' ')
    fssize = fontp.measure('.')
    sqsize = fontp.measure("'")
    repchr = ' '
    rpsize = spsize
    numr = 0
    rpdiff = 0
    if spsize != fssize:
        repchr = '.'
        rpsize = fssize
        rpdiff = abs(fssize - spsize)
    elif spsize != sqsize:
        repchr = "'"
        rpsize = sqsize
        rpdiff = abs(spsize - sqsize)
    numspace, rem = divmod(diff,spsize)
    if rem == 0:
        numr = 0
    else:
        if spsize < rpsize:
            numspace -= rem/rpdiff
            numr = rem/rpdiff
        elif spsize > rpsize:
            numr = (spsize - rem)/rpdiff
            numspace = numspace - numr + 1
    numspace -= 2
    txt = txt + '  '
    while numr > 0:
        txt = txt + repchr
        numr -= 1
    while numspace > 0:
        txt = txt + ' '
        numspace -= 1
    return txt

Feel free to play the critic...

- Hendrik




From deets at nospam.web.de  Sun Nov 12 11:26:08 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 12 Nov 2006 17:26:08 +0100
Subject: writing wx code in emacs - how to make easier?
In-Reply-To: <mailman.10.1163339109.32031.python-list@python.org>
References: <mailman.10.1163339109.32031.python-list@python.org>
Message-ID: <4rp08uFs2el7U1@mid.uni-berlin.de>

> I would like to write wx code in emacs. For now I'm using python-mode
> but I hope they are stuff which make it easier. I mean some
> autocompletion or abbrevs of such things as wx.ALIGN* wx.EVT_* ... 

Create a TAGS-file using e.g.

find <path-to-wx-installation> -type f | xargs -L1 etags --append

Then use the emacs completion-feature M-/

Diez


From dynamicdestroyer at yahoo.de  Wed Nov 15 12:39:28 2006
From: dynamicdestroyer at yahoo.de (Mateuszk87)
Date: 15 Nov 2006 09:39:28 -0800
Subject: Yield
In-Reply-To: <mailman.203.1163612224.32031.python-list@python.org>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<ejfij1$bd$1@sea.gmane.org>
	<mailman.203.1163612224.32031.python-list@python.org>
Message-ID: <1163612368.317372.232420@b28g2000cwb.googlegroups.com>

thx for the quick answer. i ll have a look.



From tjreedy at udel.edu  Fri Nov 17 21:58:21 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 17 Nov 2006 21:58:21 -0500
Subject: How can I speed this function up?
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <ejlsse$tvo$1@sea.gmane.org>


"Chris" <cfriedl at bigpond.net.au> wrote in message 
news:kou7h.67901$rP1.39303 at news-server.bigpond.net.au...
> def write_data1(out, data):
>     for i in data:
>         if i[0] is 'ELEMENT':

Testing for equality with 'is' is a bit of a cheat since it is 
implementation dependent,
but since you have a somewhat unfair constraint ....

>             out.write("%s %06d " % (i[0], i[1]))

Since i[0] is tested to be "ELEMENT', this should be the same as
         out.write("ELEMENT %06d " % i[1])
which saves constructing a tuple as well as an interpolation.

>             for j in i[2]:
>                 out.write("%d " % (j))
>             out.write("\n")

tjr





From zzf818 at gmail.com  Tue Nov  7 21:14:01 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 7 Nov 2006 18:14:01 -0800
Subject: __init__ function problem
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
	<1162929803.735097.279460@i42g2000cwa.googlegroups.com>
	<1162946870.504386.302530@m7g2000cwm.googlegroups.com>
	<mailman.1871.1162949148.11739.python-list@python.org>
Message-ID: <1162952041.142178.158500@h54g2000cwb.googlegroups.com>

Hi,
I've read all of this. And I am clear about it.
Thanks all.
Best Regards!

Gabriel Genellina wrote:
> At Tuesday 7/11/2006 21:47, Jia Lu wrote:
>
> > > In Python, the real constructor is called __new__, >
> > > Carl Banks
> >
> >But the code below won't invoke __new__:
>
> Is this a question, or just for making things more and more confusing
> to beginners?
>
> >class Test:
> >     def __new__(self, value):
> >         print "__new__",value
>
> For old-style classes __new__ is not used. On new-style classes it's
> used mostly for dealing with immutable objects. The code should be:
>
> class NewStyle(object):
>      "A new style class inherits from object in some way"
>      def __new__(cls, value):
>          print "NewStyle.__new__",value
>          return super(NewStyle, cls).__new__(cls, value)
>          # return object.__new__(cls, value) for lazy people
>
>      def __init__(self, value):
>          print "NewStyle.__init__",value
>
> class OldStyle:
>      "An old style class does not inherit from object"
>      def __init__(self, value):
>          print "OldStyle.__init__",value
>
> n = NewStyle(1)
> o = OldStyle(2)
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar



From bignose+hates-spam at benfinney.id.au  Wed Nov  8 20:27:12 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Nov 2006 12:27:12 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
Message-ID: <877iy5mmtr.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Ben Finney wrote:
> > If you pass a *mapping* of the
> > "I-might-want-to-add-more-in-the-future" values, then you get both
> > explicit *and* expandable, without an arbitrary unneeded sequence.
>
> Do you mean by using the **kwargs parameter?

No. I mean what I said in this earlier post on this thread:

    <URL:http://groups.google.com/group/comp.lang.python/msg/b413bb1f311e7ee1>

If you have a group of named, semantically-related, unsequenced
values, pass them into the function as a mapping object (a dict
object).

-- 
 \         "I have yet to see any problem, however complicated, which, |
  `\      when you looked at it in the right way, did not become still |
_o__)                             more complicated."  -- Paul Anderson |
Ben Finney



From sjmachin at lexicon.net  Thu Nov  9 21:09:37 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 18:09:37 -0800
Subject: how is python not the same as java?
In-Reply-To: <mailman.2014.1163123991.11739.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
Message-ID: <1163124577.908610.122310@e3g2000cwe.googlegroups.com>


Jorge Vargas wrote:
> On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
> > both are interpreted oo langauges......
> >
> that is not correct java is compiled and the VM interprets the code

... and what do you think is in those pesky little .pyc files you may
have noticed lying around on your hard disk?



From __peter__ at web.de  Sun Nov  5 08:02:36 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 05 Nov 2006 14:02:36 +0100
Subject: Is there a commas-in-between idiom?
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <eiknd1$bbq$01$2@news.t-online.com>

Ernesto Garc?a Garc?a wrote:

> it's very common that I have a list and I want to print it with commas
> in between. How do I do this in an easy manner, whithout having the
> annoying comma in the end?

>>> items = [1, 2, 3, "many"]
>>> print ", ".join(str(item) for item in items)
1, 2, 3, many

Peter


From manelitoau at gmail.com  Wed Nov  8 08:29:49 2006
From: manelitoau at gmail.com (manelitoau at gmail.com)
Date: 8 Nov 2006 05:29:49 -0800
Subject: Python Jogos
Message-ID: <1162992589.682760.282340@k70g2000cwa.googlegroups.com>

Jogo da velha
Jogo do galo
Codigos em python kem me arranja



From ghidox at gmail.com  Wed Nov 22 17:14:30 2006
From: ghidox at gmail.com (Ghido)
Date: 22 Nov 2006 14:14:30 -0800
Subject: Global object
Message-ID: <1164233669.952808.148210@j44g2000cwa.googlegroups.com>

Hi all, i need to save in an object some variable for use in  other
parts of my software. it's possibile without create an istance of this
class in every file? if yes how? 
thanks a lot 

Ghido



From lorenzo at excitement.com  Sat Nov  4 15:58:29 2006
From: lorenzo at excitement.com (Lorenzo)
Date: Sat, 04 Nov 2006 14:58:29 -0600
Subject: NEWBIE: Script help needed
Message-ID: <lorenzo-A4D904.14582904112006@hedley.internal.thethurmans.com>

I have this script that I want to use weekly to send me email with 
information regarding disk space and available upgrades for my system. 
This script is actually a learning tool for me as I learn Python. The 
problem I've run into has me stumped and I need some help. What happens 
is when the script runs it does these things, parses the result and 
appends that to an html string:

1) checks disk space by using df -t reiserfs
2) runs time emerge --sync 
3) runs emerge -uvp world
4) runs emerge -uv --fetchonly world

The 'emerge' command is a Gentoo specific one. If I remove step 3), 
everything else runs just fine, the email is sent and I receive what I 
expect. But when step 3) is allowed to run, even if its the only command 
that runs, it hangs somewhere in the function getCommandOutput. If I try 
and debug the command, it appears to hang on this line:
err = child.wait()

I suspect a race condition, but I'm not sure how to proceed, can someone 
lend me a hand. Here is the script I wrote, I got the command 
getCommandOutput from this site: 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52296
TIA

[code]
#!/usr/bin/python

################################
### NEED TO RUN THIS AS ROOT ###
### EMERGE SYNC REQUIRES THIS ###
################################
import os, re, smtplib, MimeWriter, mimetools, cStringIO, popen2, fcntl, 
select, pdb

cmd = 'df -t reiserfs'
finalList = []
theOutput = []

text = "This realy should be in HTML"


html = "<html>\
<head>\
<meta http-equiv=\"Content-Type\" content=\"text/html; 
charset=iso-8859-1\">\
</head>\
<BODY><BR><font color='green'><em>Disk Utilization on 
Hedley:</em></font><BR>"

out = cStringIO.StringIO()
writer = MimeWriter.MimeWriter(out)
txtin = cStringIO.StringIO(text)


def createhtmlmail (html, text, subject):
         """Create a mime-message that will render HTML in popular
      MUAs, text in better ones"""
   import MimeWriter
   import mimetools
   import cStringIO
   
   out = cStringIO.StringIO() # output buffer for our message 
   htmlin = cStringIO.StringIO(html)
   txtin = cStringIO.StringIO(text)
   
   writer = MimeWriter.MimeWriter(out)
   #
   # set up some basic headers... we put subject here
   # because smtplib.sendmail expects it to be in the
   # message body
   #
   writer.addheader("Subject", subject)
   writer.addheader("MIME-Version", "1.0")

   writer.addheader("From", "Hedley at myserver.com")
      writer.addheader("To", "lorenzo at myserver.com")
   #
   # start the multipart section of the message
   # multipart/alternative seems to work better
   # on some MUAs than multipart/mixed
   #
   writer.startmultipartbody("alternative")
   writer.flushheaders()
   #
   # the plain text section
   #
   subpart = writer.nextpart()
   subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
   pout = subpart.startbody("text/plain", [("charset", 'us-ascii')])
   mimetools.encode(txtin, pout, 'quoted-printable')
   txtin.close()
   #
   # start the html subpart of the message
   #
   subpart = writer.nextpart()
   subpart.addheader("Content-Transfer-Encoding", "quoted-printable")
   #
   # returns us a file-ish object we can write to
   #
   pout = subpart.startbody("text/html", [("charset", 'us-ascii')])
   mimetools.encode(htmlin, pout, 'quoted-printable')
   htmlin.close()
   #
   # Now that we're done, close our writer and
   # return the message body
   #
   writer.lastpart()
   msg = out.getvalue()
   out.close()
   print msg
   return msg

def makeNonBlocking(fd):
    fl = fcntl.fcntl(fd, fcntl.F_GETFL)
    try:
   fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NDELAY)
    except AttributeError:
   fcntl.fcntl(fd, fcntl.F_SETFL, fl | fcntl.FNDELAY)
    

def getCommandOutput(command):
    theOutput = []
    child = popen2.Popen3(command, 1) # capture stdout and stderr from 
command
    child.tochild.close()             # don't need to talk to child
    outfile = child.fromchild 
    outfd = outfile.fileno()
    errfile = child.childerr
    errfd = errfile.fileno()
    makeNonBlocking(outfd)            # don't deadlock!
    makeNonBlocking(errfd)
    outdata = errdata = ''
    outeof = erreof = 0
    while 1:
   ready = select.select([outfd,errfd],[],[]) # wait for input
   if outfd in ready[0]:
       outchunk = outfile.read()
       if outchunk == '': outeof = 1
       outdata = outdata + outchunk
   if errfd in ready[0]:
       errchunk = errfile.read()
       if errchunk == '': erreof = 1
       errdata = errdata + errchunk
   if outeof and erreof: break
   select.select([],[],[],.1) # give a little time for buffers to fill
   err = child.wait()
    if err != 0: 
   raise RuntimeError, '%s failed w/ exit code %d\n%s' % (command, err, 
errdata)
    theOutput.append(outdata)
    theOutput.append(errdata)
    return theOutput


#Run df and get the disk info
output =  os.popen(cmd)

# match two or more spaces, the header line has a sngle
# space between the 'Mouted on' field
# We need to keep those together
# The other spaces are the separation in the field headers
# To get the output from df down to just the field headers
# and the data, we need to match 2 or more spaces
# -1 eliminates the \n at the end of output.
# We'll get it back when we write each line to the
# mail message, I suspect

html += "<font color='blue'>"

for lines in output.readlines():

   p = re.compile('\ +')
   formattedText = p.subn('??????', lines[:-1], 5) 
   html += formattedText[0] + '<BR>'

html += "</font>"

mydata = getCommandOutput("time emerge --sync")


p = re.compile('\ +')
p.subn('?', mydata[1])[0]
p = re.compile('\n')
string = (p.subn('<BR>', mydata[1]))[0]

html += "<BR><BR><em><font color='green'>Sync Time: " + "<BR>" + 
"</font></em>" + "<font color='blue'>" + string + "</font>"


mydata = ""
mydata =  getCommandOutput("emerge -uvp world")

p = re.compile('\ +')
(p.subn('?', mydata[0]))[0]
p = re.compile('\n')
html += "<font color='blue'>" + (p.subn('<BR>', mydata[0]))[0] +  
"</font>"



try:
   getCommandOutput('emerge -uv --fetchonly world')
   html += "<font color='Green'><em><BR>Fetch completed 
successfuly!</em></font>"
except RuntimeError:
      html += "< font color='Red'><BR>******Fetch did not complete 
successfully!*********</font>"

html+= '</BODY> </HTML>'

out = cStringIO.StringIO()
writer = MimeWriter.MimeWriter(out)
txtin = cStringIO.StringIO("This should be in HTML")
subject = "Emerge info and disk utilization on Hedley"
message = createhtmlmail(html, text, subject)
server = smtplib.SMTP("hedley")
server.sendmail('Hedley at myserver.com', 'lorenzo at myserver.com', message)
server.quit()
[/code]

-- 
"My Break-Dancing days are over, but there's always the Funky Chicken"
--The Full Monty


From ralmeida at gmail.com  Thu Nov 23 07:32:54 2006
From: ralmeida at gmail.com (Rob De Almeida)
Date: 23 Nov 2006 04:32:54 -0800
Subject: WSGI with mod_python (was: Python, WSGI, legacy web application)
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
	<mailman.622.1164260110.32031.python-list@python.org>
Message-ID: <1164285174.400852.237700@j44g2000cwa.googlegroups.com>

Ben Finney wrote:
> I was under the impression that WSGI in mod_python was a rather kludgy
> way to do WSGI, but I don't know what the alternatives are. CGI?
> Python http server (e.g. CherryPy)? Something else?

You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee. I
have a short description of different ways to run a WSGI app here:

    http://pydap.org/docs/server.html

Though it's focused on a specific WSGI app I wrote it uses Paste
Deploy, so you can generalize it easily.

--Rob



From anthra.norell at vtxmail.ch  Thu Nov  2 14:59:25 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 02 Nov 2006 20:59:25 +0100
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <200611021020.31599.inq1ltd@verizon.net>
References: <4549FA01.4090706@vtxmail.ch>
	<200611021020.31599.inq1ltd@verizon.net>
Message-ID: <454A4E1D.8030106@vtxmail.ch>

jim-on-linux wrote:
> Frederic,
>
> I've been trying to get back into my package in 
> the Cheese Shop for over a year. The phone 
> company changed my e:mail address and to make a 
> long and frustrating story short I can't get back 
> into the Cheese Shop to make changes to my file.
>
> Time is money.  At some time you have to consider 
> if it is worth it.  At least you have the name of 
> your program listed.
>
> I wish I could be more helpfull. I'll watch the 
> responses you get from others.
>
> Good Luck,
> jim-on-linux
>
> http://www.inqvista.com
>
>
>
>
>
>
> On Thursday 02 November 2006 09:00, you wrote:
>   
>> Some time ago I had managed to upload a small
>> package to the Cheese Shop using the data entry
>> template. Uploading is in two steps: first the
>> text then the package file. When I had a new
>> version it went like this: The new text made a
>> new page, but the new file went to the old
>>     
> snip
>   


Thanks for letting me know that I am not alone. Do you know of an 
alternative to the Cheese Shop?

Frederic




From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 10 21:06:06 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 11 Nov 2006 13:06:06 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2gp9$1qc$1@sea.gmane.org>
	<mailman.2055.1163186198.11739.python-list@python.org>
Message-ID: <pan.2006.11.11.02.06.05.727087@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 13:16:32 -0600, Michael Hobbs wrote:

> Yeah, okay, I didn't read through the details of the PEP. I picked a bad 
> example to illustrate a point that is still true. The FAQ also tries to 
> argue that it's a Good Thing that join() is a string method, not a list 
> method. It also tries to argue that there's a good reason that lists are 
> different than tuples. I don't think it would surprising that many 
> Python developers don't really buy those arguments either.

Well, as far as I'm concerned, you've just blown your credibility
completely out the water now. 

Yes, I'm aware that there are many Python programmers who don't get join()
or lists/tuples, but I'm constantly surprised by that fact. At the risk of
starting another argument, to my mind that's like discovering that there
are professional butchers who don't think that using a sharp knife is a
good idea.


-- 
Steven.



From godson.g at gmail.com  Fri Nov 24 01:40:33 2006
From: godson.g at gmail.com (Godson)
Date: Fri, 24 Nov 2006 12:10:33 +0530
Subject: Porting Tkinter application to JYthon
In-Reply-To: <20061123045218.BFAF8CA0A4@ws5-11.us4.outblaze.com>
References: <20061123045218.BFAF8CA0A4@ws5-11.us4.outblaze.com>
Message-ID: <f9822b400611232240w8693e1q7c59d7bafdb1cf14@mail.gmail.com>

On 11/23/06, sandip desale <desale at india.com> wrote:
>
> Dear All,
>
> We have a Tcl/Tk application written using Python 2.2. Using this
> application we want to call some customizable Java APIs. I tried porting
> Tcl/Tk application to Jython but not able to do the same as TKinter library
> is not available with JYthon.
>
> Can you please help me in porting Tkinter application to Jython? Also
> kindly let me know how to do the same.
>
>
> Thanks & Regards,
> Sandip Desale
>
>
> --
>
> Search for products and services at:
> http://search.mail.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Try this, may be this is what you are looking for

http://jtkinter.sourceforge.net/

Godson Gera
http://godson.auroinfo.com
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From tiedon_jano at hotmail.com  Sat Nov 11 17:50:34 2006
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sat, 11 Nov 2006 22:50:34 GMT
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163277168.079436.65120@e3g2000cwe.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
	<1163139352.206221.213180@m73g2000cwd.googlegroups.com>
	<1163141290.868726.11330@h48g2000cwc.googlegroups.com>
	<43hal2p6ep7vds2nl55uqil7v7i3guncl2@4ax.com>
	<1163277168.079436.65120@e3g2000cwe.googlegroups.com>
Message-ID: <_ss5h.372$Nv3.369@read3.inet.fi>

John Henry wrote:
> BTW: I did a search and found the testnotebook example from:
> 
> http://prdownloads.sourceforge.net/pythoncard/testNotebook.zip?download
> 
> and tried it out.  There is one error in the widget.py that I have to
> get around.  Changed from:
> 
>         canvas.setFillColor('gray')
> 
> to:
> 
>         try:
>             canvas.setFillColor('gray')
>         except:
>             pass
> 
> and then ran it.   Works!
> 
> So, yes, you can do Notebook in Python.  I believe what they are saying
> is that Notebook isn't supported fully (yet) in the resourceeditor.

It's true that the notebook and grid components of wxPython are not 
completely integrated into PythonCard but they can still be used quite 
easily once you figure out how.

The process of figuring out can be made easier by a working example. The 
real life application Blood Pressure Monitor

http://personal.inet.fi/cool/operator/BPMDownload.html

can be used as an example of using the notebook, grid and htmlwin 
widgets in PythonCard.

I use this application to input the pressure values I've registered with 
my own meter and to produce a PDF page with PyChart to hand to my doctor 
to inspect when I visit him twice a year.

Cheers,
Jussi

--
Jussi Salmela
http://personal.inet.fi/cool/operator/


From john106henry at hotmail.com  Fri Nov 17 16:42:47 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 13:42:47 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163792282.802768.216630@m73g2000cwd.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163713573.147702.229320@k70g2000cwa.googlegroups.com>
	<1163792282.802768.216630@m73g2000cwd.googlegroups.com>
Message-ID: <1163799767.280869.247000@b28g2000cwb.googlegroups.com>

Thanks for pointing that out.  I wasn't aware of this.  Will take a
look.


S?bastien Boisg?rault wrote:
> On Nov 16, 10:46 pm, "John Henry" <john106he... at hotmail.com> wrote:
> > Bill Gates will have you jailed! :-)
> >
> > On a more serious note, is there any alternative to Simulink though?
>
> Ptolemy II. Java stuff in the core but components may be written in
> Python
>
> http://ptolemy.eecs.berkeley.edu/ptolemyII/
> http://ptolemy.eecs.berkeley.edu/ptolemyii/ptII5.0/ptII/doc/codeDoc/ptolemy/actor/lib/python/PythonScript.htm
>
> > sturlamolden wrote:
> > >and is infinitely
> > > more expensive.
> >
> > > Does anyone wonder why I am not paying for Matlab maintenance anymore?
> >
> > > Sorry Mathworks, I have used your product for years, but you cannot
> > > compete with NumPy.
> > 
> > > Cheers,
> > > Sturla Molden



From torriem at chem.byu.edu  Tue Nov 14 23:48:35 2006
From: torriem at chem.byu.edu (Michael Torrie)
Date: Tue, 14 Nov 2006 21:48:35 -0700
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163559359.010787.185840@m73g2000cwd.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
Message-ID: <1163566115.10270.5.camel@enterprise.local.lan>

On Tue, 2006-11-14 at 18:55 -0800, Luis M. Gonz?lez wrote:
> 
> > - Python is more readable, and more general purpose
> 
> Yes, php is only for web.

Absolutely false.  Most of my standalone, command-line scripts for
manipulating my unix users in LDAP are written in PHP, although we're
rewriting them in python.

Although I can't think of a single app written in php that's not web-
based (other than standalone scripts I have written), there are up-to-
date php bindings for GTK: http://gtk.php.net/

Michael


> On the other hand, Python is a general purpose language and it can be
> used for nearly anything you may want to do.
> 
> > - PHP has awful backward compatibility
> 
> Yes. And it's also an ugly language to work with.
> 
> > - PHP has a lower barrier to entry
> 
> I don't think it is any easier than python. Not even to begin with.
> 
> > - Most inexpensive web-hosters support PHP, but not Python
> 
> Sad but true.
> 
> > - PHP has far more pre-writen scripts available
> 
> For web projects, perhaps.
> But I'm sure you can do everything better with python, especially with
> the new crop of web frameworks (Django, Turbo Gears, etc...).
> 
> > - Newer versions of mod_python require Apache 2.0, which few hosters
> > have
> 
> You can also get alder versions of mod_python. What's the problem?
> 
> > - There is more demand for PHP developers, than Python developers
> 
> So you want to be a web developer?
> Then look no further. Learn python and go kick php developers asses in
> the market place.
> There are thousands of php developers out there. Do you want to be just
> one more?
> I'd rather learn something newer, and much more powerful.
> And once you get a job, you will do everything better and faster than
> the others, your quality will stand up from the rest and so your
> reputation.
> Then there will be more demand for "your skills".
> 



From nick at craig-wood.com  Tue Nov 28 05:30:09 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 28 Nov 2006 04:30:09 -0600
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
Message-ID: <slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
>  In <8osmm21skionildtnme1j0nvqbla6oqk72 at 4ax.com>, Vincent Delporte wrote:
> 
> > Anyone knows if those lines are necessary, why, and what their
> > alternative is in Python?
> > 
> > open STDOUT, '>/dev/null'; 
> 
>  sys.stdout = open(os.devnull, 'w') 

This doesn't have the desired effect

If you run this

  import os,sys,time
  print os.getpid()
  sys.stdout = open(os.devnull, 'w')
  time.sleep(60)

It prints its pid.

$ ls -l /proc/32004/fd
total 4
lrwx------ 1 ncw ncw 64 Nov 28 09:55 0 -> /dev/pts/17
lrwx------ 1 ncw ncw 64 Nov 28 09:55 1 -> /dev/pts/17
lrwx------ 1 ncw ncw 64 Nov 28 09:55 2 -> /dev/pts/17
l-wx------ 1 ncw ncw 64 Nov 28 09:55 3 -> /dev/null

That quite clearly shows that stdout isn't /dev/null which is required
for proper deamonisation under unix.

I'm not sure how you do open stdout to /dev/null in python though!

I suspect something like this...

  import posix
  posix.close(1)
  posix.open("/dev/null", posix.O_WRONLY)


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


From http  Wed Nov  8 13:01:56 2006
From: http (Paul Rubin)
Date: 08 Nov 2006 10:01:56 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162947569.228388.16940@m7g2000cwm.googlegroups.com>
	<eit1ab$q9j$1@news.albasani.net>
Message-ID: <7xy7qlom0b.fsf@ruckus.brouhaha.com>

robert <no-spam at no-spam-no-spam.invalid> writes:
> what about speed. Is it true that IronPython is almost as fast as C-Python meanwhile?
> 
> When this all is really true, its probably a proof that putting out
> LOCK-INC-lock's (on dicts, lists, mutables ...) in CPython to remove
> the GIL in future should not be really so expensive as it was teached
> in the past :-)

I don't think IronPython uses locks that way.  AFAIK it doesn't use
reference counts, and relies on user-supplied synchronization to keep
stuff like dictionaries safe.


From sjmachin at lexicon.net  Tue Nov 28 21:26:29 2006
From: sjmachin at lexicon.net (John Machin)
Date: 28 Nov 2006 18:26:29 -0800
Subject: Floating Exception
References: <ekg8tq$uk8$1@nobel.pacific.net.sg>
Message-ID: <1164767189.395397.128450@l39g2000cwd.googlegroups.com>

Jeremy wrote:
> Hi,
>
> I just changed some previously-working Python program to add a C++
> extension.
>
> Now, when I call __init__() in a Python class I did not change and with the
> same arguments passed, I get the screen message 'Floating exception' and the
> program seems to stop. The exact point of the crash in __init__() seems to
> depend on from which directory I run the Python program.
>
> What is wrong?

Could it possible be your C++ extension, do you think?

> And what is a floating exception?

Do you know how to use Google? Search for "floating exception".

Fix your extension, and it'll go away.

HTH,
John



From aahz at pythoncraft.com  Thu Nov 30 16:40:49 2006
From: aahz at pythoncraft.com (Aahz)
Date: 30 Nov 2006 13:40:49 -0800
Subject: Python spam?
References: <ekn9pi$ek8$1@panix3.panix.com>
	<mailman.895.1164917209.32031.python-list@python.org>
Message-ID: <eknj51$bt7$1@panix3.panix.com>

In article <mailman.895.1164917209.32031.python-list at python.org>,
Thomas Heller  <theller at ctypes.org> wrote:
>Aahz schrieb:
>>
>> Anyone else getting "Python-related" spam?  So far, I've seen messages
>> "from" Barry Warsaw and Skip Montanaro (although of course header
>> analysis proves they didn't send it).
>
>I'm getting spam not only from Barry, but also from myself ;-) with
>forged headers.  But I'm not sure what you mean with Python-related...
>Not the contents, IIRC.

Thing is, I don't usually get spam "from" people I know (or at least it
gets filtered before I see it), so someone is clearly using some resource
of Python-related email addresses.  Just seems rather odd, and I wonder
whether it's some kind of DoS attack or what.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Member of the Groucho Marx Fan Club  


From _karlo_ at _mosor.net_  Thu Nov  2 12:02:28 2006
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Thu, 2 Nov 2006 17:02:28 +0000 (UTC)
Subject: Forum written in Python?
Message-ID: <Xns986FB78516025mosornet@161.53.160.64>

Are there any forum or bulletin board systems written entirely in Python? 
I got sick of PhpBB, mostly because I can't tweak and fiddle with the 
code, since I really don't like PHP and don't know it that well.

I thought of writting my own simple forum software, but if there are 
existing projects out there, I wouldn't mind contributing. So far I found 
out about Pocoo, but it seems to immature right now, I was looking for 
something comparable to PhpBB or IPB?


-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From steve at REMOVEME.cybersource.com.au  Wed Nov 15 02:12:32 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 15 Nov 2006 18:12:32 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.11.15.07.12.31.716203@REMOVEME.cybersource.com.au>

On Tue, 14 Nov 2006 12:01:05 +0000, Antoon Pardon wrote:

> On 2006-11-13, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>> Michael Hobbs <mike at hobbshouse.org> writes:
>>
>>> To be clear, this is the actual thrust of my argument. It seems
>>> redundant to have *both* line continuations and colons in compound
>>> statements.
>>
>> Why are you trying to remove redundancy?
> 
> Why not? My impression is that removing redundancy is considered
> a positive thing here in c.p.l.

Redundancy in *what*?

Redundancy is not something to be valued for its own sake. It is only
valuable when it actually gains you something.

e.g. x + y and x.__add__(y) are redundant, BUT __add__ is necessary for
operator overloading and + operator is necessary for readability and
easy arithmetic expressions.

Likewise, operator.add is useful for local optimizations, and so is to be
valued despite the redundancy of yet another way to do addition.

But a hypothetical built-in function add(x,y) => x+y would be redundant
for no good reason, and therefore to be resisted.

The question is not "is the colon redundant?" but "is the colon useful
despite, or even because, its redundancy?". There are two schools of
thought:

(1) Yes, it is useful, *because* of its redundancy -- it helps the human
reader parse and comprehend the source code.
Evidence given: usability studies by the ABC project.

(2) No, it is not useful, because the computer parser doesn't need it.
Evidence given: "it seems to me" repeated loudly until our ears bleed.

People's intuition is notoriously poor at judging usability. I don't say I
give it zero credence, but I give it very little.


-- 
Steven D'Aprano 



From john.smith at nowhere.com  Sun Nov 26 19:31:39 2006
From: john.smith at nowhere.com (john.smith at nowhere.com)
Date: Sun, 26 Nov 2006 19:31:39 -0500
Subject: test message
Message-ID: <9fckm2p839oh7c586t93c9fn3lfppu43g3@4ax.com>

This is a test message, please ignore.


From john at castleamber.com  Thu Nov 16 01:37:38 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 06:37:38 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
	<pan.2006.11.16.03.30.28.643676@REMOVEME.cybersource.com.au>
Message-ID: <Xns987D660A93E5castleamber@130.133.1.4>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

> Seriously though, there is no contradiction between the idea of
> "people use Python instead of Java because they prefer to avoid pain"

It sounds like a typical fanboy statement to me, since it implies that 
Java is always a pain, and Python is perfect. I can't take such a 
statement nor the person writing it down serious at all.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From deets at nospam.web.de  Thu Nov  9 17:54:49 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Nov 2006 23:54:49 +0100
Subject: how to create a multicolor "font-string" in pygame??
In-Reply-To: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>
References: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>
Message-ID: <4rhptpFrneqhU1@mid.uni-berlin.de>

Iacopo.Marmo at gmail.com schrieb:
> Hi! I need to manipulate multicolor strings, i.e. strings with a color
> associated with each letter.
> Any suggestions?

There is no support for multi-color strings as such in pygame. If you 
use a fixed-width font, things are easy. Just create the strings one 
after another using spaces as prefix. E.g.

back = (0,0,0)
font = pygame.font.Font(font_fn, size)
images = []
for i, c in enumerate("colored string"):
     s = " " * i + c
     color = color_for_index(i)
     s_image = font.render(s, True, color, back)
     images.append(s_image)


Then blit the images onto each other.

If you don't use fixed widht fonts, things get more complicated. Then 
you should calculate the size of the prefix to a certain characer, and 
store that together with the image:

text = "colored string"
back = (0,0,0)
font = pygame.font.Font(font_fn, size)
images = []
for i, c in enumerate(text):
     s = " " * i + c
     color = color_for_index(i)
     prefix_offest = font.size(text[:i])
     s_image = font.render(s, True, color, back)
     images.append((prefix_offset, s_image))

Then you have to combine the images according to the prefix offset.

Diez


From CRhode at LacusVeris.com  Sat Nov 18 20:24:10 2006
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Sat, 18 Nov 2006 19:24:10 -0600
Subject: Finding skilled pythonistas for micro-jobs?
In-Reply-To: <7x64dc8e24.fsf@ruckus.brouhaha.com>
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
	<7x64dc8e24.fsf@ruckus.brouhaha.com>
Message-ID: <20061119012410.GA12944@loki>

Paul Rubin wrote this on Sat, Nov 18, 2006 at 04:39:47PM -0800.  My
reply is below.

> "darran" <darran at edmstudio.com> writes:

> > Any suggestions then for locating skilled Python/C++ programmers
> > for these small (micro) jobs?

> I've taken a number of these and always regretted it.  They've been
> far more hassle than they're worth.  But maybe that's just me.

I've never seen the point of trying to compete for the kind of
work-at-home programming jobs you see posted on Internet clearing
houses.  A number of reservations have always stopped me:

o The problem descriptions are nebulous or incoherent or both.

o No background scope is provided.

o No performance criteria are set forth.

o No pay rate is specified.

o No due date is mentioned.

Obviously, it would take longer to draw these things together than it
would to do the job itself, at least in the posters' opinions.  I
can't help wondering, though, if they're serious, because, if they
need the job completed successfully, however trivial it may be,
sooner or later somebody is going to have to do their homework, and,
yes, it's going to take at least twice as long as they're willing to
spend when they get around to it.

I think there's a case to be made for hiring a another full-time
programmer if these small jobs keep cropping up.  Part of his job
description can be to prepare needs assessments and impact analyses
and to prioritize requests before he even thinks about beginning a
task.  It's difficult to outsource these things, and they are time
consuming.

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 38? ? Wind NNW 9 mph ? Sky overcast.


From scott.daniels at acm.org  Mon Nov  6 23:24:55 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 06 Nov 2006 20:24:55 -0800
Subject: Projecting MUD maps
In-Reply-To: <4r8qjtFpkllgU2@uni-berlin.de>
References: <mailman.1793.1162765972.11739.python-list@python.org>
	<4r79c5Fptb28U1@uni-berlin.de>
	<mailman.1804.1162815961.11739.python-list@python.org>
	<4r8qjtFpkllgU2@uni-berlin.de>
Message-ID: <455001b5$1@nntp0.pdx.net>

Diez B. Roggisch wrote:
> But there is no cookbook-algorithm that will produce perfect MUD-maps. For
> such a beast, you have to cough up one on your own, with things like
> constraint solvers and the like. Certainly over _my_ head, at least without
> deep studies of planar graph representation problems.

To convince yourself of this, here is a small problem
that does not flatten to any simple 2-D solution.
Consider :

     A, B, C
     a, b, c

A.south, B.South, C.south = a, b, c
a.north, b.north, c.north = A, B, C

A.east, B.east, C.east = a, b, c
a.west, b.west, c.west = A, B, C

a.east, b.east, c.east = A, B, C
A.west, B.west, C.west = a, b, c

-- 
--Scott David Daniels
scott.daniels at acm.org


From infotechsys at pivot.net  Sun Nov 19 10:36:42 2006
From: infotechsys at pivot.net (infotechsys at pivot.net)
Date: Sun, 19 Nov 2006 10:36:42 -0500
Subject: A little confuse
Message-ID: <1163950602.32026.9.camel@Tiredbones.lan>

When I run this code in the pdb it works.
 accountNbr = 1
 for testLine in ftest.readlines():
        acct = testLine[1:2]             #there account number
        if accountNbr == int(acct):
            accountNbr = accountNbr + 1

When I run without the debugger I get this error.

 File "./casco.py", line 62, in process
    if accountNbr == int(acct):
ValueError: invalid literal for int(): "

Can someone explain?



From e0427417 at student.tuwien.ac.at  Mon Nov 20 03:54:41 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 09:54:41 +0100
Subject: a few extensions for the itertools
In-Reply-To: <pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
Message-ID: <45616cf4$0$10578$3b214f66@tunews.univie.ac.at>

Steven D'Aprano wrote:
> On Sun, 19 Nov 2006 21:35:24 +0100, Mathias Panzenboeck wrote:
> 
>> I wrote a few functions which IMHO are missing in python(s itertools).
>>
>> You can download them here:
>> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>>
>> A short description to all the functions:
>>
>> icmp(iterable1, iterable2) -> integer
>> 	Return negative if iterable1 < iterable2,
>> 	zero if iterable1 == iterable1,
>> 	positive if iterable1 > iterable1.
> 
> 
> What does it mean for an iterable to be less than another iterable? That
> it has fewer items? How do these two iterables compare?
> 
> iter([1, 2, None, "foo", 3+2j])
> 
> def ones():
>     while 1:
>         yield 1
> 
> Which is smaller?
> 
> 

it's like cmp on lists, but on iterables.

[1,2,3] < [1,2,4]
[1,2,3] < [1,2,3,0]
...

> 
>> isum(iterable, start=0) -> value
>> 	Returns the sum of the elements of a iterable
>> 	plus the value of parameter 'start'.  When the
>> 	iterable is empty, returns start.
> 
> 
> You mean just like the built-in sum()?
> 

No, because the builtin sum can't handle iterables other than lists. Or dose it? Hmm, maby it dose 
since any new version and I didn't mention it.

>>>> sum(xrange(12), 1000)
> 1066
> 
> 
>> iproduct(iterable, start=0) -> value
>> 	Returns the product of the elements of a iterable
>> 	times the value of parameter 'start'.  When the
>> 	iterable is empty, returns start.
> 
> If I recall, product() was requested about the same time that sum() was
> introduced, and Guido rejected it as a built-in because it was really only
> useful for calculating geometric means, and it is easy to do if you need
> it:
> 
> def product(it, start=1):
>     # default value of 1 is more sensible than 0
>     # 1 is the multiplicative identity
>     p = start
>     for x in it:
>         p *= x
>     return p
> 
> 
>> forall(predicate, iterable, default=True) -> bool
>> 	Returns True, when for all elements x in iterable
>> 	predicate(x) is True. When the iterable is empty,
>> 	returns default.
>>
>>
>> forany(predicate, iterable, default=False) -> bool
>> 	Returns True, when for any element x in iterable
>> 	predicate(x) is True. When the iterable is empty,
>> 	returns default.
> 
> 
> I vaguely recall plans for all() and any() builtins -- perhaps for Python
> 2.5?
> 

all() and any() don't get predicate functions as arguments.

> 
>> take(n,iterable) -> iterator
>> 	returns a iterator over the first n
>> 	elements of the iterator
> 
> Just like itertools.islice(iterable, n).
> 
>>>> list(itertools.islice(xrange(10), 5))
> [0, 1, 2, 3, 4]
> 

ok, ok, ok. I have overseen that.

> 
>> drop(n,iterable) -> iterable
>> 	drops the first n elemetns of iterable and
>> 	return a iterator over the rest
> 
> Just like itertools.islice(iterable, n, None)
> 
>>>> list(itertools.islice(xrange(20), 15, None))
> [15, 16, 17, 18, 19]
> 
> (Aside: I think islice would be so much cleaner if it took keyword
> arguments.)
> 
> 
> 
>> heads(iterable) -> iterator over all heads
>> tails(iterable) -> iterator over all tails
> 
> What would you use these for?
> 
> 
>> fcain(funct,*functs) -> function(...,***)
>> 	fcain(f1,f2,...,fn)(*args,*kwargs) equals f1(f2(...fn(*args,*kwargs)))
> 
> 
> The usual term for this is function composition.
> 
> 


From sjmachin at lexicon.net  Sun Nov 19 06:39:25 2006
From: sjmachin at lexicon.net (John Machin)
Date: 19 Nov 2006 03:39:25 -0800
Subject: Finding skilled pythonistas for micro-jobs?
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
Message-ID: <1163936364.875248.14590@h54g2000cwb.googlegroups.com>

darran wrote:
> I'm a partner in a design and technology studio that creates
> large-scale interactive exhibits for museums.  We are agile - by
> choice.   For big 6-12 month projects, we try and secure exceptional
> python talent on contract.  The python job board addresses this need.
>
> Every few weeks though I run up against a bite-sized programming
> problem begging to be farmed out by our small company.  The tasks
> themselves span the gamut from data wrangling (format conversions) to
> SWIG wrappers to Twisted to pyOpenGL.  Often the task is 1 or 2 days of
> work.  Not really big enough to warrant a job search, a contract, or
> even someone's full-time attention.  The type of problem that is
> perfectly suited to a CS student or daytime programmer looking to make
> some extra money.  Presently, when one of these jobs pops up, I just
> add 8-16 hours to my work week - much to the dismay of my 3-year old
> daughter who'd rather I pay someone and go to the park.  The nice thing
> though about our bite-sized jobs is that the goals are perfectly clear
> because we are religious in our use of unit testing and test-driven
> development.
>
> Any suggestions then for locating skilled Python/C++ programmers for
> these small (micro) jobs?
>

A few entries from my own cynic's dictionary:

Agile: the accounts dept displays fancy footwork when the bill is
submitted

Religious: Religions in IT come and go; the only tenets universally
held by customer management have always been the Divine Right of Kings
and Papal Infallibility, both applied of course only to themselves

Clear goals, unit testing as applied to "data wrangling" -- a nonsense.
Specs are prepared that are only tangentially relevant to the task and
have obviously not been derived from any inspection of the data.

Example (had allegedly been peer reviewed and mgt reviewed):
"Placenames [in Australia] shall be validated to contain only letters
and spaces" [or words to that effect] -- never mind no mention of case.
Never mind that a moment's armchair reflection would have indicated
that apostrophe and hyphen might be reasonable candidates. Australia is
not heavily populated. Then (and now) the full list of placenames and
postcodes needed for the application was printed at the back of
larger-city phone directories, as found on the desks of  "business
analysts". It was available on floppy disk and in paper booklets from
the Post Office. I believe that it was even available in Braille, so
that the proverbial Blind Freddie would have been able to tell them
that the *first* entry was [then] "A1 MINE SETTLEMENT".

Cheers,
John



From george.sakkis at gmail.com  Fri Nov 10 21:53:50 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 10 Nov 2006 18:53:50 -0800
Subject: Inheritance Question
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
	<mailman.2080.1163209251.11739.python-list@python.org>
Message-ID: <1163213630.258725.129890@i42g2000cwa.googlegroups.com>

Gabriel Genellina wrote:

> If walking in general, have some common structure, you can put the
> "sketch" on Legs and let the derived classes "fill the gaps". This is
> known as "Template Method Pattern" - look for it.

Or if you'd rather see a concrete example, here's how your toy example
would look refactored using the template pattern:

class Creature(object)
  def run(): pass
  def walk():
    # lots of commands
    # that do not depend on the
    # number of legs but definitely
    # have to do with walking

    self._specialized_walk(*args, **kwds)

    # more commands

  def _specialized_walk(self, *args):
    raise NotImplementedError


class UnipedalCreature(Creature):
  def _specialized_walk(self, *args, **kwds):
    # blahblah


class BipedalCreature(Creature):
  def _specialized_walk(self, *args, **kwds):
    # blahblah


HTH,
George



From eopadoan at altavix.com  Wed Nov 29 12:52:01 2006
From: eopadoan at altavix.com (Eduardo "EdCrypt" O. Padoan)
Date: Wed, 29 Nov 2006 15:52:01 -0200
Subject: How to detect what type a variable is?
In-Reply-To: <456DC03D.7040107@tim.thechases.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<1164818738.403393.112900@j44g2000cwa.googlegroups.com>
	<456DC03D.7040107@tim.thechases.com>
Message-ID: <dea92f560611290952v212ad04ap17f2f307b86e006c@mail.gmail.com>

>
> One might prefer to check for string-ness, as strings can
> duck-type somewhat like lists:
>
> my_list = ['my', 'brain', 'hurts']
> my_string = 'Are you the brain specialist?'
>
> for test in [my_list, my_string]:
>      try:
>          for thing in test:
>              process_list_item(thing)
>      except Exception: #whatever flavor you want

The exception should be the one that process_list_item raises when it
receives a string instead of a list. if you want to treat strings and
list in different ways, maybe it means that you are doing different
operations on then, like appendind things to the list or whatever. If
not, than you maybe want to test the types.

>          process_string(thing) # not called because
>          #strings are iterable

What if you invert your code?


for test in [my_string, my_list]:
    try:
        process_string_item(thing)
        #suppose process_string_item does some string operation on a
list and gets this
        # exception - because if not, I see no meanning in distinguishing then
    except ValueError:
        for thing in test:
            process_list_item(thing)

But maybe you have a reason to do things to a string that could be
done to a list without raising an exception, but you dont want to do
this to *that* list. My sugestion was to think if there is another
way, and maybe you are right.


-- 
EduardoOPadoan (eopadoan->altavix::com)
Bookmarks: http://del.icio.us/edcrypt
Blog: http://edcrypt.blogspot.com
Jabber: edcrypt at jabber dot org
ICQ: 161480283
GTalk: eduardo dot padoan at gmail dot com
MSN: eopadoan at altavix dot com


From yqiang at gmail.com  Tue Nov  7 16:49:50 2006
From: yqiang at gmail.com (Yi Qiang)
Date: Tue, 7 Nov 2006 13:49:50 -0800
Subject: Compiling python 2.5 on OS X 10.4.8 with bsddb support
Message-ID: <3af8969a0611071349m338056a4hc194830e571e721c@mail.gmail.com>

Hi guys,
I am trying to compile python 2.5 on my OSX machine so it includes the
bsddb module.  Currently, when I type 'import bsddb' I get the
following traceback:

/Users/yi/Software/sage-1.4.1.2/local/lib/python2.5/bsddb/__init__.py
in <module>()
     49         from bsddb3.dbutils import DeadlockWrap as _DeadlockWrap
     50     else:
---> 51         import _bsddb
     52         from bsddb.dbutils import DeadlockWrap as _DeadlockWrap
     53 except ImportError:

<type 'exceptions.ImportError'>: No module named _bsddb

I have the db3 and db4 packages installed from macports.  What else
must I do to get this working?

Thanks,
Yi


From __peter__ at web.de  Fri Nov 10 09:05:52 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Nov 2006 15:05:52 +0100
Subject: Back Slash not allowed at the end of raw string?
References: <mailman.2031.1163166744.11739.python-list@python.org>
Message-ID: <ej20vf$s28$02$1@news.t-online.com>

yuhao wrote:

> I'm using Python 2.5 on Windows XP Pro.
> While testing for strings, I got the following result:
> 
>>>> r'c:\'
> SyntaxError: EOL while scanning single-quoted string

> what does this message mean? I'm not using any single quote in the
> statement. It this a bug or by design?

http://effbot.org/pyfaq/why-can-t-raw-strings-r-strings-end-with-a-backslash.htm



From ronrsr at gmail.com  Mon Nov 27 14:48:09 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 11:48:09 -0800
Subject: can't get cgi values
In-Reply-To: <ekfc3b$pe1$1@news.albasani.net>
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
	<ekfc3b$pe1$1@news.albasani.net>
Message-ID: <1164656888.974302.21120@14g2000cws.googlegroups.com>

Thank you, all.  that was very helpful, and did solve many of my
problems.  I was addressing the dict with () rather than [].

I'm still having one problem, though -- extracting the keywords. NOw,
if you check the value for Form below, you'll see there is more than
one keyword entry.  When I do:  keywords = form["keywords"] - what sort
of data structure do I get back?

th anks          so much again.

-rsr-


    if form.has_key("keywords"):
         keywords = str(form["keywords"].value)
     else:
          keywords = "k"
     fileHandle.write("here comes keywords:")
     fileHandle.write(str(keywords))

     fileHandle.write("keyword info");
     fileHandle.write(str(form.has_key("keywords")))
     fileHandle.flush()

> here's the info I know:
>
> form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
> MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
> 'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
> April 2002\\r\\n       \\r\\n       \r\n       '),
> MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
> small number of agri-businesses, many of them large corps. Yet these
> subsidies are 6 times what rich countries provide in foreign aid to a
> developing world that includes 5 billion people.\\r\\n       \r\n
> '), MiniFieldStorage('updatebutton', 'Update')])
> form.has_key("citation") = True
> 
>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 10 21:16:43 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 11 Nov 2006 03:16:43 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
	<pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>
Message-ID: <4rkq4bFrfp4kU1@mid.individual.net>

Steven D'Aprano wrote:

> And just for the avoidance of doubt, Python "x == blue or red or
> yellow" is semantically equivalent to:
> 
> (x == blue) or bool(red) or bool(yellow)

Yep, got it. Shame on me, it's so obvious now :)

Regards,


Bj?rn

-- 
BOFH excuse #317:

Internet exceeded Luser level, please wait until a luser logs off
before attempting to log back on.



From xi at gamma.dn.ua  Sat Nov 18 15:30:26 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 22:30:26 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
	<NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
Message-ID: <20061118203026.GC3393@58sirius016.dc.ukrtel.net>

On Sat, Nov 18, 2006 at 01:22:44PM -0600, Larry Bates wrote:
> Oleg Broytmann wrote:
> > On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
> >> Could anyone suggest me a simple IDE suitable for teaching Python as a
> >> first programming language to high school students?
> > 
> >    Does it have to be an IDE? Wouldn't it be better to use a simple text
> > editor + command line?
> > 
> > Oleg.
> Not sure about cyrillic and I don't mean if you are looking for Windows
> IDE, but I'm impressed with Pyscripter:
> 
> http://mmm-experts.com/Products.aspx?ProductId=4

PyScripter does, indeed, look nice, but unfortunately it appeared to
have similar issues with cyrillic support. Thank you anyway for the
suggestion.


Thanks,
Kirill


From wierd_joe at spamhoo.com  Sat Nov 25 03:32:13 2006
From: wierd_joe at spamhoo.com (Spiro)
Date: Sat, 25 Nov 2006 09:32:13 +0100
Subject: Inheritance and recursion problem
Message-ID: <ek8v2b$luv$1@sunce.iskon.hr>

Hi all,
i'm trying to make some user interface objects in python.

I have classes XWindow and XMainWindow(XWindow) (XMainWindow inherited 
from XWindow)

XWindow have all drawing functionality and Windows[] object which holds 
all child windows.
Function Draw looks like this:
def Draw(self):
	self.Back.blit
	for wnd in self.Windows:
		wnd.Draw(OffsetX, OffsetY)

Now in main module i make objects:
RootWindow=XWindow()
MW=XMainWindow()
RootWindow.Widnows.append(MW)

Now the problem:
When i call RootWindow.Draw() he calls wnd.Draw where wnd is XMainWindow 
from RootWindow's Windows[] collection.
Now, we are in MW's Draw and MW's Windows[] collection should be empty 
but somehow he has itself (well, new instance of XMainWindow) in this 
collection and i got unlimited reference.

...
While writing this post i tried something:
instead of using RootWindow.Windows.append(MW)
i used RootWindow.Windows=[MW] and now it's OK.

I'm happy now, my code works, but i don't know what was happening there: 
why append made new instance of object instead of passing existing object.


From mail at microcorp.co.za  Mon Nov 13 02:08:33 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 13 Nov 2006 09:08:33 +0200
Subject: Random image text generation?
References: <mailman.21.1163361663.32031.python-list@python.org><DaL5h.287$Ib3.250761@news.siol.net><mailman.23.1163365020.32031.python-list@python.org><pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
	<4557a186$0$5806$4d3efbfe@news.sover.net>
Message-ID: <000e01c707a6$76520200$03000080@hendrik>

From: "Leif K-Brooks" <eurleif at ecritters.biz> wrote:

> Steven D'Aprano wrote:
> > For a text only solution, consider putting up a natural language question
> > such as:
> >
> > What is the third letter of 'national'?
> > What is four plus two?
> > How many eggs in a dozen?
> > Fill in the blank: Mary had a little ____ its fleece was white as snow.
> > Cat, Dog, Apple, Bird. One of those words is a fruit. Which one?
>
> That wouldn't work as a true CAPTCHA (Completely Automated *Public*
> Turing test to tell Computers and Humans Apart), since making the list
> of questions and answers public would defeat its purpose.

you could consider keeping these answers secret - the spammers would then be
stymied...



From mirandacascade at yahoo.com  Mon Nov 20 02:31:04 2006
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 19 Nov 2006 23:31:04 -0800
Subject: ElementSOAP and <soap:Header>
Message-ID: <1164007864.239490.20810@k70g2000cwa.googlegroups.com>

1) Is it correct that none of the examples in the ElementSOAP tutorial:

http://effbot.org/zone/elementsoap-1.htm

include an example in which the SOAP message that contains the request
includes a <soap:Header> block?

2) If one wanted to make use of ElementSOAP, and one wanted it to
produce a SOAP message that includes a <soap:Header> would the general
outline be:
  a) use ElementTree to create and populate the <soap:Header> element
  b) insert the <soap:Header> element as a subelement of envelope in
the SoapService class

I think much of my confusion stems from my lack of understanding of
SOAP.  As I understand it, <soap:Header> is an optional part of a SOAP
message.  I'm pretty sure that 'optional' at a minimum means that not
all SOAP messages must contatin a <soap:Header>.  But does 'optional'
mean more than that?  Does it mean that one could get by without ever
having to produce a SOAP message that includes a <soap:Header>?  Or,
are there some webservices where if one didn't include a <soap:Header>
in the SOAP message, the webservice would not work?

Thank you.



From fredrik at pythonware.com  Sat Nov 25 16:12:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 22:12:43 +0100
Subject: The Python Papers Edition One
In-Reply-To: <1164471238.033790.243890@14g2000cws.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164471238.033790.243890@14g2000cws.googlegroups.com>
Message-ID: <ekabkb$6gc$1@sea.gmane.org>

Noah Slater wrote:

> Which is more important to the Python comunity...

the community definitely don't need more random usenet posters who's 
only contribution is to complain whenever someone tries to do some-
thing.  this thread is an embarrassment for the Python community; you 
should all be ashamed of yourself.

</F>



From aahz at pythoncraft.com  Thu Nov 30 14:01:06 2006
From: aahz at pythoncraft.com (Aahz)
Date: 30 Nov 2006 11:01:06 -0800
Subject: Python spam?
Message-ID: <ekn9pi$ek8$1@panix3.panix.com>

Anyone else getting "Python-related" spam?  So far, I've seen messages
"from" Barry Warsaw and Skip Montanaro (although of course header
analysis proves they didn't send it).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Usenet is not a democracy.  It is a weird cross between an anarchy and a
dictatorship.


From gnewsg at gmail.com  Fri Nov 10 13:17:10 2006
From: gnewsg at gmail.com (billie)
Date: 10 Nov 2006 10:17:10 -0800
Subject: RAW network programming under Windows
In-Reply-To: <1162769348.785276.294790@h48g2000cwc.googlegroups.com>
References: <1162759117.346975.255000@f16g2000cwb.googlegroups.com>
	<1162769348.785276.294790@h48g2000cwc.googlegroups.com>
Message-ID: <1163182629.955072.170690@h54g2000cwb.googlegroups.com>

sturlamolden wrote:

> You can try to install "Windows Services for Unix 3.5" (aka SFU 3.5).
> It transforms your Windows into a certified UNIX (not just a Unix
> clone). SFU 3.5 has a full BSD socket API (derived from OpenBSD), not
> just Winsock. As the POSIX subsystem in SFU 3.5 is not layered on top
> of the Win32 subsystem, but talks directly to the NT kernel,
> restrictions in Winsock should not affect the BSD sockets in SFU 3.5.
> This behaviour is different from e.g. Cygwin, where the "Unix APIs" are
> layered on top of the Win32 subsystem.

It isn't exactly what I'm searching for but thanks anyway.

> In any case, I hope you are aware that spoofing IP packets gives you
> bad karma.

No problem about it. I'm just a lover of low-level network programming.
=)



From mike at hobbshouse.org  Fri Nov 10 14:33:42 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Fri, 10 Nov 2006 13:33:42 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej2igj$826$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<ej2igj$826$1@sea.gmane.org>
Message-ID: <4554D416.70408@hobbshouse.org>

Ron Adam wrote:
> The faq also pointed out a technical reason for requiring the colon.  It makes 
> the underlying parser much easier to write and maintain.  This shouldn't be 
> taken to lightly in my opinion, because a simpler easer to maintain and more 
> reliable python parser means development time can be spent improving the 
> language in other areas instead of fixing parsing problems every time a new 
> feature is added that might be used in a conditional expression.
>   
Not to be too picky about it, but the FAQ was referring to editor 
parsers, not the parser used by Python itself. The Python parser could 
easily change its grammar to make the colon optional.

I find the editor parsing excuse to be weak since most editors tend to 
get hung up on Python code anyway, regardless of the colons. (Except for 
the ones that are specifically written to support Python, or are 
insanely programmable, like emacs.) In fact, I find that my editor 
usually gets confused when it comes across colons in dictionary literals 
or lambda expressions. If it just stuck to looking at the indentation, 
instead of trying to play off syntax tricks, it would behave much better.

- Mike



From bignose+hates-spam at benfinney.id.au  Wed Nov  8 20:35:09 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 09 Nov 2006 12:35:09 +1100
Subject: is this the right way to do subclasses?
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
Message-ID: <871wodmmgi.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Ok, back to my so-called "game." I'm just curious if I've
> implemented the subclasses properly, because it seems like an awful
> lot of repetition with the parameters. And again, if I want to add a
> new attribute later, I'd have to change a lot of things. I can't
> help but get the feeling that I'm doing something very
> inefficiently.

This is another reason why passing the "stats" values as a mapping
object is a good alternative.

> class Character(object):
>      def __init__(self, name, strength, dexterity, intelligence):
>          self.name = name
>          self.health = 10
>          self.strength = strength
>          self.dexterity = dexterity
>          self.intelligence = intelligence

    class Character(object):
        stat_keys = ['strength', 'dexterity', 'intelligence']
        def __init__(self, name, stats):
            self.name = name
            self.health = 10
            self.stats = {}
            for (key, value) in [(k, stats.get(k)) for k in stat_keys]:
                setattr(self, key, value)

> class Fighter(Character):
>      def __init__(self, name, strength, dexterity, intelligence):
>          Character.__init__(self, name, strength, dexterity, intelligence)
>          self.health += 2
>          self.strength += 1

    class Fighter(Character):
        def __init__(self, name, stats):
            Character.__init__(self, name, stats)
            self.health += 1
            self.strength += 1

et cetera.

All you need to do to add a new type of "stat" is to add a new item to
the 'stat_keys' list in Character.

-- 
 \      "I bought a self learning record to learn Spanish. I turned it |
  `\        on and went to sleep; the record got stuck. The next day I |
_o__)                could only stutter in Spanish."  -- Steven Wright |
Ben Finney



From python.list at tim.thechases.com  Wed Nov  1 09:35:47 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 01 Nov 2006 08:35:47 -0600
Subject: Make all files extension lower by a given directory name
In-Reply-To: <20061101141648.38737.qmail@web15001.mail.cnb.yahoo.com>
References: <20061101141648.38737.qmail@web15001.mail.cnb.yahoo.com>
Message-ID: <4548B0C3.3040801@tim.thechases.com>

>>>             fullname = name[:len(name) - 1] + ext.lower()
>> are you sure you want to strip off the last character in the actual 
>> filename?  should "FOO.BAR" really be turned into "FO.bar" ?
>> name[:len(name) - 1] can be written name[:-1], btw.
>>>             os.rename(os.path.join(path, file), os.path.join(path, fullname))
>>>
>>> I know this code is lame
>> except for the potential bug, and possibly the lack of error handling 
>> for the os.rename call, I'm not sure why you think that.
>> </F>
> 
> thanks a lot!
> 
> strip off the last character because if simply add name and
> ext I got result like "FOO..bar", there are two dots. I'm

When you split the filename and extension, the dot/separator 
remains as part of the extension.  If you recombine the two 
pieces, you shouldn't try and add a dot back in.  The code you 
posted originally doesn't do this, but you may have tweaked the 
original code before posting to the list.  If anything, you'd 
want to strip the dot off the left side of the extension rather 
than try and monkey with the right side of the filename portion.

 >>> os.path.splitext('hello.txt')
('hello', '.txt')
 >>> help(os.path.splitext)
Help on function splitext in module ntpath:

splitext(p)
     Split the extension from a pathname.

     Extension is everything from the last dot to the end.
     Return (root, ext), either part may be empty.


-tkc






From steve.ingram at tnei.co.uk  Sat Nov 11 15:38:07 2006
From: steve.ingram at tnei.co.uk (Steve Ingram)
Date: Sat, 11 Nov 2006 20:38:07 -0000 (UTC)
Subject: Close program built with py2exe
Message-ID: <1569.80.46.127.179.1163277487.squirrel@www.tnei.co.uk>

Hiya,

I've got a problem with a program I've written and want to distribute. It
uses a wxPython dialog and I've built a distribution version with py2exe.
Problem is when I run the .exe under windows I can only stop the program
completely using the task manager. When I close the dialog and check the
task manager, there is still a running process. I think this is probably
the python interpreter that is still running.

Can't find any help anywhere, does anyone know how to get the dialog to
kill the process properly??

Ta very much,

Steve



From ask at me  Thu Nov  2 00:35:32 2006
From: ask at me (alf)
Date: Wed, 01 Nov 2006 23:35:32 -0600
Subject: can I import the module twice (under differnet names)
Message-ID: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>

Hi,

wonder if in the python I could treat modules imorts like classes 
instances. It means I could import it twice or more times under 
different names.

-- 
alfz1


From 2huggie at gmail.com  Sun Nov 26 04:55:10 2006
From: 2huggie at gmail.com (Timothy Wu)
Date: Sun, 26 Nov 2006 17:55:10 +0800
Subject: Generator question
In-Reply-To: <ekbmqg$lip$1@sea.gmane.org>
References: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>
	<ekbmqg$lip$1@sea.gmane.org>
Message-ID: <ebf8d36c0611260155g27835536lb7e220a47e1dd1a4@mail.gmail.com>

On 11/26/06, Robert Kern <robert.kern at gmail.com> wrote:
>
>
> The only thing that the last line does is *create* a new generator object.
> You
> need to actually iterate over it and yield its values. E.g.
>
>
> In [2]: def test_gen(x):
>    ...:     yield x
>    ...:     x -= 1
>    ...:     if x != 0:
>    ...:         for y in test_gen(x):
>    ...:             yield y
>    ...:
>    ...:
>
> In [3]: list(test_gen(3))
> Out[3]: [3, 2, 1]



Ha-HA, that makes perfect sense I guess. Though in my opinion the definition
makes the code a bit harder to read. Thanks for the explanation.

Timothy
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From otw67 at xs4all.nl  Fri Nov 10 04:30:15 2006
From: otw67 at xs4all.nl (ruud habets)
Date: Fri, 10 Nov 2006 10:30:15 +0100
Subject: python wiki question
Message-ID: <455446a7$0$335$e4fe514c@news.xs4all.nl>

Hi,

Does anybody know how to determine if a wiki page is a redirectpage 
using the wikipedia-scripts? It must be something like

if IsRedirectPage() == False:
    text_file.write("\n")

But I cannot seem to get it working.

thnx
Ruud


From fredrik at pythonware.com  Thu Nov 16 02:40:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 08:40:27 +0100
Subject: Decimal() instead of float?
In-Reply-To: <017d01c7094b$86032a20$03000080@hendrik>
References: <1163294604.4675.4.camel@pepper><mailman.2125.1163295096.11739.python-list@python.org><pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au><1163322853.760315.51040@k70g2000cwa.googlegroups.com>	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
	<017d01c7094b$86032a20$03000080@hendrik>
Message-ID: <ejh4la$l9u$1@sea.gmane.org>

Hendrik van Rooyen wrote:

> Nothing wrong with doing that - its not as if you are going to arithmetic with
> them - adding my id to yours is generally not very useful...

internal rowid's are best treated as pointers, though.  they're more 
like memory addresses than labels.

(from a design perspective, it's not entirely obvious that it's a good 
idea to use rowid's to point *into* the database from the outside, but 
that's another story).

</F>



From eternalsquire at comcast.net  Mon Nov  6 22:47:48 2006
From: eternalsquire at comcast.net (The Eternal Squire)
Date: 6 Nov 2006 19:47:48 -0800
Subject: Python Distilled
In-Reply-To: <1162860101.746321.73770@h54g2000cwb.googlegroups.com>
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<08Odnc6j7uKLxtLYnZ2dnUVZ_oydnZ2d@comcast.com>
	<1162860101.746321.73770@h54g2000cwb.googlegroups.com>
Message-ID: <1162871268.604656.306610@h48g2000cwc.googlegroups.com>

Try also Diet Python on SourceForge.

It's the first step toward a shrunken Python for embedded Win32
systems.

Cheers,

The Eternal Squire


Simon Wittber wrote:
> > http://www.python.org/dev/summary/2006-09-16_2006-09-30/#shrinking-python
> 
> Excellent, just what I was hoping for. Thanks!
> 
> -Sw.



From boris.smirnov at gmail.com  Thu Nov  9 11:53:54 2006
From: boris.smirnov at gmail.com (boris.smirnov at gmail.com)
Date: 9 Nov 2006 08:53:54 -0800
Subject: extract text from a string
In-Reply-To: <12l6ku8ahpave08@corp.supernews.com>
References: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>
	<12l6ku8ahpave08@corp.supernews.com>
Message-ID: <1163091234.372222.37300@h48g2000cwc.googlegroups.com>

Thank you very much.
I needed this kick. :)
Rg,
Boris


Grant Edwards nap?sal(a):
> On 2006-11-09, boris.smirnov at gmail.com <boris.smirnov at gmail.com> wrote:
> > Hallo all,
> >
> > I have tried for a couple of hours to solve my problem with re but I
> > have no success.
> >
> > I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
> > become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
> > code of how to extract this text from that string?
>
> >>> s = "+abc_cde.fgh_jkl\n"
> >>> s[1:-1]
> 'abc_cde.fgh_jkl'
>
> --
> Grant Edwards                   grante             Yow!  ... I think I'm
>                                   at               having an overnight
>                                visi.com            sensation right now!!



From no-spam at no-spam-no-spam.invalid  Thu Nov  9 15:37:53 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 09 Nov 2006 21:37:53 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1163072637.924217.90610@h54g2000cwb.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<mailman.1858.1162935489.11739.python-list@python.org>
	<eit29m$rmk$1@news.albasani.net>
	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>
Message-ID: <ej03j3$5ge$1@news.albasani.net>

Paul Boddie wrote:
> robert wrote:
>> Shane Hathaway wrote:
>>> of multiple cores.  I think Python only needs a nice way to share a
>>> relatively small set of objects using shared memory.  POSH goes in that
>>> direction, but I don't think it's simple enough yet.
>>>
>>> http://poshmodule.sourceforge.net/
>> interesting, a solution possibly a little faster than pickling - but maybe only in selected
>> situations. Made already experiments with pickling through shared memory.
> 
> What did you discover in your experiments? I'd certainly suspect that
> pickling is going to add an unacceptable degree of overhead in the kind
> of application you're attempting to write (using a shared data
> structure with random access properties), and I'll admit that I haven't
> really had to deal with that kind of situation when using my own
> pickle-based parallelisation solutions (which involve communicating
> processes).
> 
>> With "x = posh.share(x)" an object tree will be (deep-)copied to shared mem ( as far as
>> objects fullfil some conditions http://poshmodule.sourceforge.net/posh/html/node6.html: is
>> this true for numpy arrays?)
> 
> My impression is that POSH isn't maintained any more and that work was
> needed to make it portable, as you have observed. Some discussions did
> occur on one of the Python development mailing lists about the
> possibility of using shared memory together with serialisation
> representations faster than pickles (which also don't need to be
> managed as live objects by Python), and I think that this could be an
> acceptable alternative.
> 
>> Every object to be inserted in the hot tunnel object tree has to be copied that same style.
>> Thus ~pickling, but somewhat easier to use.
> 
> If my understanding of "hot tunnel object tree" is correct, you're
> really wanting fast access involving mutual exclusion to some shared
> data structure. At this point it becomes worth considering some kind of
> distributed object technology (or even a database technology) where you
> have to initialise the data structure and then communicate with an
> object (or database) to perform operations on it, all for reasons I'll
> explain shortly.
> 
> In your ideal situation, you say that you'd have the data structure in
> the same address space as a number of threads, and each thread would be
> able to perform some algorithm on the data structure, but the pattern
> of accessing the structure isn't an insignificant concern even where
> you can assume that the overheads are generally low: reading and
> writing things might be fast in the same address space, but if the
> nature of access involves lots of locking, you'll incur quite a penalty
> anyway. In other words, if each read or write to the structure involves
> acquiring a lock for that operation in isolation, this could
> significantly diminish performance, whereas if you can guarantee that
> the granularity of locking is more coarse than having to occur upon
> each read or write access - that there exist some high-level operations
> that require consistency within the data structure - then reasonable
> performance might be maintained.
> 
> However, if the pattern of concurrent access is restricted to coarse
> operations, where some entity has exclusive access to a potentially
> large dataset, and where the overhead of the communication of inputs
> and outputs to and from that entity is low in comparison to the cost of
> performing such coarse operations, and where such operations are
> themselves performed infrequently, then such a pattern coincides with
> classic database or distributed object scenario. In other words, you
> implement the operations acting on the data structure in a distributed
> object (or as a database query or operation) and then invoke such
> operations from separate processes.
> 
> I hope this makes some sense. Generally, demands for high concurrent
> performance using threads often ignore other important properties such
> as reliability and scalability. Certainly, threads have an important
> place - classically, this involved maintaining responsiveness in
> graphical user interfaces - but even then, the background threads were
> often detached and not competing for the same resources as the
> foreground threads servicing the event loop. The only kinds of
> situation I can think of right now which might benefit from uninhibited
> random access to shared data structures might be things like
> simulations or large-scale multi-user games, where an appropriate data
> architecture cannot be decided in advance, but even then there are
> approaches which attempt to mitigate the seemingly unpredictable nature
> of access to shared data.

Some thoughts may make reason, when one wants to trick the single GIL a little. 
But the length of the text tells us again to possibly get at least refcounting thread safe (within access restrictions) - or get rid of refcount - or do it an go the full path towards a GIL free Python.

Besides some programming costs the speed cost would be that of a few LOCK INC's. Rumors tell not much - and almost nothing when not using non-SMP threading. I'd like to see experimental data regarding the speed. Found nothing on the web so far.

And optimistic all lockfree basic datastructures (obmalloc's freelist, dicts, queues,..) could be built up for futher optimizations:
http://64.233.183.104/search?q=cache:KUXW1Ya2duwJ:softwareforums.intel.com/ids/board/message%3Fboard.id%3D42%26message.id%3D68+SMP+%22LOCK+INC%22+speed&hl=de&gl=de&ct=clnk&cd=2


Little test:

--------------------
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

volatile int x=0;
clock_t c0,c1;
time_t t0,t1;

int main (int argc, char **argv) {
  int sum = 0, i, count = 1000000000;
  t0=time(&t0);
  c0=clock();
  for (i = 0; i < count; ++i) {
      __asm lock inc x;   
      // __asm inc x;   
      sum += x;
  }
  c1=clock();
  t1=time(&t1);
//  printf("%d\n", sum);  
  printf("clocks: %d\n", c1-c0);  
  printf("secs:   %d\n", t1-t0);  
  return sum;
} 


--------------
0040101F   mov         eax,3B9ACA00h
13:     for (i = 0; i < count; ++i) {
14:         __asm lock inc x;
00401024   lock inc    dword ptr [_x (00408a00)]
15:         sum += x;
0040102B   mov         edx,dword ptr [_x (00408a00)]
00401031   add         esi,edx
00401033   dec         eax
00401034   jne         main+24h (00401024)
16:     }
---------------

results on a UP PIII :

INC version:
clocks: 7520
secs:   7

LOCK INC version:
clocks: 36632
secs:   36


Its probably not much...

-robert


From jstroud at mbi.ucla.edu  Sat Nov  4 03:56:02 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Nov 2006 08:56:02 GMT
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162626260.236167.157920@m73g2000cwd.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
	<k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>
	<1162626260.236167.157920@m73g2000cwd.googlegroups.com>
Message-ID: <CAY2h.21661$TV3.1374@newssvr21.news.prodigy.com>

Gerard Flanagan wrote:
>> py> # the following is probably the trickiest, should it return a Table
>> py> # should it be illegal?
>> py> # should t['Last'] be the way to take the "slice" and get the col?
>> py> t[None, 'Last']     # 1d slice returns list (2nd dim. explicit)
>> ['Barker', 'Burnet', 'Danson', 'Cooper']
> 
> I can imagine manipulating columns at the Table creation stage -
> insert, append, delete column - but after that I think you would be
> dealing with rows more often. Personally, if I needed columns I would
> be happier with a list comprehension:
> [ (row['Last'], row['Age']) for row in t ]
>      etc.

To make a table from list comprehension in this way seems like it would 
require some redundancy because a list comprehension only gets you a 
list (of rows or lists). It seems if you wanted to work with your 2d 
selection of data, then you would want to get a table back:

data = [ (row['Last'], row['Age']) for row in t ]
t2 = Table(('Last','Age'), data)

This seems, to me, to separates selection in the 2 dimensions and makes 
it "backwards":

data = [ (row['Last'], row['Age']) for row in t[1:3]]
t2 = Table(('Last','Age'), data)

So a function would be needed to group the selection in a way that 
reflects the organization of the table:

t2 = t.subtable((1,3), ('Last','Age'))

But then, since the latter seems a natural consequence of using list 
comprehension for selection, how might one distinguish a range of 
columns if not by a verbose function name?

t2 = t.subtable_with_column_range((1,3), ('Last','Age'))

The concept of slicing seems to take care of this. Maybe

t2 = t.subtable(slice(1,3), slice('Last','Age'))

But this begins to seem awkward and verbose to boot. Any suggestions on 
adapting your idea of list comprehension to generate subtables?


> eg. like:
> 
>     http://buzhug.sourceforge.net/
> 
>> py> t2 = t[1:3, ('First', 'Age')]  # 2d slice returns a new Table
>> py> t3 = t[1:3,'First':'Age']  # shorthand to take a swath of columns
>> py> t3 = t[1:3, 0:2]  # if we know what column numbers we want instead
> 
> t[1:3][0:2] and so on would be more intuitive to me, possibly
> t[1:3]['First':'Age']

This looks better than my slicing, and to argue with it I'd have to 
break my own rules and point out that it would require making an 
intermediate table in the implementation. I am emulating numarray 
slicing closely, which itself is probably focused on implementation and 
speed.


James


From no-spam at no-spam-no-spam.invalid  Fri Nov 10 06:48:51 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 10 Nov 2006 12:48:51 +0100
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <ej1ov4$dqf$1@news.albasani.net>

gavino wrote:
> both are interpreted oo langauges......
> 

Thinks the first FAQs and tutorials about Python answer this question in detail.

Theoreticalls you'd start off thinking this: 
* Java is a stiff typing language (as old C/C++/Pascal... and even Perl are also ). 
* Python is a dynamic typing language - regarding almost all aspects. 
>From that each language can try to achieve some benefits of the other basic paradigm by becoming cramped.

Practically:
* you will type a Python programs >5x faster than the equivalent in Java. 
* This is true, at least when we assume that test code has to be done for a good program anyway 
  (and/otherwise "pychecker" will neutralize most first-glance disadvantages of Python)
* Jave (typed code) ist executed faster. Yet Python is even faster when using little C, Pyrex, ...

That is probably what counts.

Robert


From http  Fri Nov  3 14:29:36 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 11:29:36 -0800
Subject: Sorted and reversed on huge dict ?
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
Message-ID: <7xvelwib1b.fsf@ruckus.brouhaha.com>

Fredrik Lundh <fredrik at pythonware.com> writes:
>      items = d.items()
>      items.sort(key=operator.itemgetter(1), reverse=True)
> 
> the items list would require a couple of megabytes for 150k dictionary
> entries, or so.  the key map needs some memory too, but the rest of
> the sort is done in place.

I think the OP's method avoided the key map.


From will at willmcgugan.com  Thu Nov 30 12:48:43 2006
From: will at willmcgugan.com (Will McGugan)
Date: 30 Nov 2006 09:48:43 -0800
Subject: extremely slow array indexing?
References: <1164907021.765969.129280@80g2000cwy.googlegroups.com>
Message-ID: <1164908923.363433.43770@l39g2000cwd.googlegroups.com>


Grace Fang wrote:

> Hi,
>
> I am writing code to sort the columns according to the sum of each
> column. The dataset is huge (50k rows x 300k cols), so i need to read
> line by line and do the summation to avoid the out-of-memory problem.
> But I don't know why it runs very slow, and part of the code is as
> follows. I suspect it's because of array index, but not sure. Can
> anyone
> point out what needs to be modified to make it run fast? thanks in
> advance!

Array indexing is unlikely to be the culprit. Could it not just be
slow, because you are processing a lot of data? With numbers those big
I would expect to have enough time to go make a coffee, then drink it.

If you think it is slower than it could be, post more code for
optimization advice...

Will McGugan
--
http://www.willmcgugan.com



From saptarshi.guha at gmail.com  Wed Nov  8 20:22:58 2006
From: saptarshi.guha at gmail.com (sapsi)
Date: 8 Nov 2006 17:22:58 -0800
Subject: Using Python from Cocoa App via PyObjc - numbers dont match...
Message-ID: <1163035378.654266.287360@m73g2000cwd.googlegroups.com>

Hi,
I managed to create a python class and instantiate that from my
Objective C Cocoa App (its not a python app).
Essentially, i made two classes in IB and then another class(ogle) with
outlets for these two.

Now here is the implementation for ogle.m
-(void)awakeFromNib
{
    NSNumber *n=[NSNumber numberWithFloat:40.4];
    NSLog(@"%@",n);

    NSNumber *b=[it2 printNok:n];
    NSLog(@"%@",b);

    //
}
The first output in the console is 40.4 and the second
-40.40000152587891.

If i change the NSLog(s)  to "%f",[n floatValue] (and the second
likewise) the first is 40.400002 and the second is -40.400002.

Why does this happen?
Thanks
Saptarshi

p.s the python routine printNok, just returns the negative of the
number i.e printNok:

def printNok_(self, obj):
        return -obj



From dlenski at gmail.com  Fri Nov 10 09:55:15 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 10 Nov 2006 06:55:15 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <op.tiskd0perqur0o@eb.pragmadev>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<slrnel6vs2.17k.wojciech_mula@cat.tac>
	<1163106111.916021.103880@b28g2000cwb.googlegroups.com>
	<op.tiskd0perqur0o@eb.pragmadev>
Message-ID: <1163170515.451653.65120@m7g2000cwm.googlegroups.com>


Eric Brunel wrote:
> On Thu, 09 Nov 2006 22:01:51 +0100, Dan Lenski <dlenski at gmail.com> wrote:
> > Tk 8.4 appears to use native Win32 widgets under Cygwin and native
> > WinXP.
>
> It seems to depend on the widget type, and on what you call native... For
> example, tk menus are definitely the native ones; tk scrollbars are the
> native ones, but with the Win2k look (no XP look available yet); tk
> buttons do not seem to be the native ones, as they don't act like "normal"
> Windows buttons.

So, basically, Tk is actually embedding the native Win2k menus, but it
isn't actually embedding the native Win2k scrollbars... it's just
emulating their look and feel?

> > But it definitely doesn't use GTK widgets under Ubuntu with
> > Gnome desktop.
>
> You seem to imply that GTK is "native" on Linux. It isn't, as can be seen
> with the echoes of the "holy war" between Gnome and KDE that we often see
> around here. As an aside, I personnally work on Linux and don't even use
> any of these environments (both are too much Windows-like to my taste...).

I didn't imply that GTK widgets are "native" on Linux.  I implied that
GTK widgets native under Gnome ;-)  I was basing my assumption on an
earlier poster who said that Tk 8.x can use native widgets on all
supported platforms... so I assumed that under Gnome it should use GTK
widgets.

> > Is there a way to get it to do so?
>
> Not yet. But tcl/tk 8.5 will include the Tile extension including new
> themable widgets. See here:
> http://tktable.sourceforge.net/tile/screenshots/unix.html

Good to know!  I'm looking forward to 8.5.

Dan



From no-spam at no-spam-no-spam.invalid  Wed Nov  8 11:25:26 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 08 Nov 2006 17:25:26 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eii1ur$a60$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
Message-ID: <eit0dq$orc$1@news.albasani.net>

robert wrote:
> Martin v. L?wis wrote:
[..]
> 
> Thanks for that info. That is interesting.
> Thus even on x86 currently this LOCK is not used  (just    
> (op)->ob_refcnt++) )
> 
> Reading this I got pinched: In win32ui there are infact Py_INC/DECREF's 
> outside of the GIL !
> And I have a severe crash problem with threaded apps - the problem is 
> only only on dual cores !
> That pointer probably will end a long search...

In fact that it was in win32ui. Months I've search the bug strainedly, and this fancy discussion revealed it :-)


From sjmachin at lexicon.net  Sun Nov  5 13:31:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Nov 2006 10:31:12 -0800
Subject: finding the list of the matched strings
In-Reply-To: <gel3h.22544$TV3.1150@newssvr21.news.prodigy.com>
References: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
	<gel3h.22544$TV3.1150@newssvr21.news.prodigy.com>
Message-ID: <1162751472.515380.139460@b28g2000cwb.googlegroups.com>


James Stroud wrote:
[snip]
> I think I'm having some network problems. I'll try again. Also the
> previous "attempt" had a typo (perhaps a freudian slip).

Also this time you replied to the wrong thread :-)

>
> ",".join(some_list).
>
> By the way, don't name your own objects with the names of built-in
> types, such as "list" or "str", etc.



From carsten at uniqsys.com  Sun Nov 12 12:52:21 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Sun, 12 Nov 2006 12:52:21 -0500
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163315927.963179.114030@m73g2000cwd.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
Message-ID: <1163353941.3497.45.camel@localhost.localdomain>

On Sat, 2006-11-11 at 23:18 -0800, Doug wrote:
> Michael Hobbs wrote:
> > I think the colon could be omitted from every type of compound
> > statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
> >
> > Thanks,
> > - Mike
> 
> It is a very good idea as the colon is technically redundant (not
> necessary for parsing, aside from one liners) and actually hurts
> readability (and writeability).  The "evidence" people cite for the
> advantage of using a colon is research done by users of the ABC
> language, python's predecessor.  They forget that A) that was like 20
> years ago,

Research being old does not automatically invalidate it. Old research is
invalidated by newer research that invalidates it.

>  B) the language was designed for children,

http://www.cwi.nl/archive/projects/abc.html does not mention children:
"Originally intended as a language for beginners, it has evolved into a
powerful tool for beginners and experts alike."

>  and C) the
> keywords in ABC are IN ALL CAPS LIKE THIS (hurting readability and
> writeability) and thus adding a colon obviously helps restore some
> readability for users in that case but not in python's.

So what are you saying? In a programming language that doesn't use all
caps keywords, adding colons to block-beginning lines hurts readability,
or it doesn't add any readability?

In any case, that's an assertion that should be backed up by citing
relevant research.

> However, python is far too old to accept any fundamental changes to
> syntax at this point.

The source code for Python is openly available. If you are so convinced
of the added readability from removing the colons, do the world a favor
and make the necessary change, or hire somebody to make the change, to
Python.

-Carsten




From laurent.pointal at limsi.fr  Mon Nov 27 07:14:59 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 27 Nov 2006 13:14:59 +0100
Subject: Ruby/Python/REXX as a MUCK scripting language
In-Reply-To: <4sr3neF111j0gU1@mid.individual.net>
References: <2006112418112116807-zobeid@techiecom>
	<4sr3neF111j0gU1@mid.individual.net>
Message-ID: <ekel45$351$1@upsn250.cri.u-psud.fr>

Fred Bayer a ?crit :
> 
> Tony Belding wrote:
>> I'm interested in using an off-the-shelf interpreted language as a
>> user-accessible scripting language for a MUCK.  I'm just not sure if I
>> can find one that does everything I need.  The MUCK must be able to
>> call the interpreter and execute scripts with it, but the interpreter
>> must also be able to call functions in the MUCK code.  And then
>> there's the security issue that really worries me. . .  I have to be
>> able to limit what the interpreter can execute.  I can't have my users
>> running scripts that access the console, access the filesystem or
>> sockets directly, or call libraries or other binaries outside the MUCK.
>>
>> Is this practical?  I'm thinking of Ruby or Python for this, if they
>> can meet the requirements.
>>
> 
> Don't forget Lua: www.lua.org
> It fulfills your requirements and is easily embedable.
> 

I Agree with F.Bayer, when reading OP post, I immediatly think about Lua.





From robert.kern at gmail.com  Fri Nov 10 01:51:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 10 Nov 2006 00:51:30 -0600
Subject: Printing to file, how do I do it efficiently?
In-Reply-To: <ej155s$n3k$1@enyo.uwa.edu.au>
References: <ej155s$n3k$1@enyo.uwa.edu.au>
Message-ID: <ej17hs$fc9$1@sea.gmane.org>

Cameron Walsh wrote:
> Hi all,
> 
> I have a numpy.array of 89x512x512 uint8's, set up with code like this:

numpy questions are best asked on the numpy list, not here.

  http://www.scipy.org/Mailing_Lists

> data=numpy.array([],dtype="uint8")
> data.resize((89,512,512))

You might want to look at using numpy.empty() here, instead.

> # Data filled in about 4 seconds from 89 image slices
> <snip lots of processing code>
> 
> 
> I first tried writing this data to a binary raw format (for use in a
> program called Drishti) as follows:
> 
> # The slow bit:
> volumeFile=file("/tmp/test.raw","wb")
> for z in xrange(Z):
>     for y in xrange(Y):
>         for x in xrange(X):
>             volumeFile.write("%c" %(data[z,y,x]))
> volumeFile.close()
> 
> That took about 39 seconds.
> 
> My second attempt was as follows:
> volumeFile = open("/tmp/test2.raw","wb")
> data.resize((X*Y*Z)) # Flatten the array
> for i in data:
>     volumeFile.write("%c" %i)
> data.resize((Z,Y,X))
> volumeFile.close()
> 
> This took 32 seconds.  (For those of you unfamiliar with numpy, the
> data.resize() operations take negligible amounts of time, all it does is
> allow the data to be accessed differently.)

No, if the total size is different, it will also copy the array. Use .reshape()
if you want to simply alter the shape, not the total number of elements.

> I'm guessing that the slow part is the fact that I am converting the
> data to character format and writing it one character at a time.  What
> is a better way of doing this, or where should I look to find a better way?

data.tostring()

-- 
Robert Kern

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



From mauriceling at acm.org  Sat Nov 25 02:18:30 2006
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 25 Nov 2006 07:18:30 GMT
Subject: The Python Papers Edition One
In-Reply-To: <mailman.703.1164432447.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<7xodqyn5kd.fsf@ruckus.brouhaha.com>	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
	<mailman.703.1164432447.32031.python-list@python.org>
Message-ID: <4567ee43$1@news.unimelb.edu.au>

Jerry Hill wrote:
> On 11/25/06, Jerry Hill <malaclypse2 at gmail.com> wrote:
> 
>> On 23 Nov 2006 15:09:11 -0800, tleeuwenburg at gmail.com
>> <tleeuwenburg at gmail.com> wrote:
>> > Yes, it's true that you can't resell copies of The Python Papers for
>> > personal profits, but you may derive from it, reproduce and propagate
>> > it. You're quite right to point it out.
>>
>> My problem with this is that I can't use anything in your publication
>> when working on commercial software.  If I were to derive code from
>> something in the Python Papers, my understanding is that I would be
>> obligated to release it under a Creative Commons license.  In fact,
>> even if all I do is read an article and then incorporate concepts from
>> it in my code, my understanding is that I may be creating a derivative
>> work.
>>
>> Since the code that I write for work belongs to my employer, and may
>> someday be sold, I need to be careful about the licensing issues. They
>> might not be very happy with me if I wrote software for them that
>> ended up being encumbered with a license they didn't like.  I don't
>> think there's much of a problem with Issue 1, since I don't think I'd
>> end up copying the code in the 'Python Coding Idioms' article, and
>> MontyLingua is GPL software and thus has its own licensing issues for
>> commercial software.  Still, if there was a useful article on, say,
>> database or web interfaces, I would have to avoid it.  If I have to
>> avoid using any articles that might actually be useful in my
>> professional life, I feel like I should probably just avoid the
>> journal all together.  If I've misrepresented the relevant copyright
>> issues, I'd be happy for someone to correct me.
>>

As Steven mentioned -- anything you can read is copyrighted. The 
difference is whether is the copyright effective or enforceable. What do 
I mean by this? Without copyright, there will not be plagarism. Ask 
yourself this question, can you copy William Shakespeare's MacBeth and 
submit it as a literary work for a Master of Literary Arts degree? I 
believe the candidate will be expelled from university. William 
Shakespeare's MacBeth is still copyrighted work but not "enforceable" 
because it is pre-1900's work and the author had been dead for more than 
50 years. Similarly, works in public domain are still copyrighted -- 
academically, using work in public domain without attribution (giving 
credits in the form of citations) is still plagarism.

This means that everything you had read since the days of "ABC..." are 
copyrighted. That includes all codes you've seen in colleges etc etc. I 
am afraid that to avoid copyright altogether, as far as your work is 
concerned, you might have to seclude yourself in some pacific islands 
and re-discover mathematics and computer science all over again from 1 + 
1 = 2, and 2 + 1 = 3, and so on. Even so, patents will still get you at 
the end.

In copyright, there is fair use. There is no way of avoiding it totally 
-- how many ways are there to write a list comprehension?

Copyright just says attribute credits when you use someone else's work 
within the limits of fair use; otherwise you might have to pay for it in 
the form of a licence, subject to the copyright owner. I believe you've 
done all these in college when writing your essays.

I believe in most cases, a simple declaration like "This function is a 
re-implementation (or adaptation) of that found in <some periodical's 
title, year, and page number>" will suffice.

Have you not read "The Python Cookbook", in book form or from the 
website? How do you attribute credits when you are using the codes?

Cheers
maurice


From http  Fri Nov  3 14:21:51 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 11:21:51 -0800
Subject: Sorted and reversed on huge dict ?
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
Message-ID: <7xd584l4j4.fsf@ruckus.brouhaha.com>

vd12005 at yahoo.fr writes:
> i would like to sort(ed) and reverse(d) the result of many huge
> dictionaries (a single dictionary will contain ~ 150000 entries). Keys
> are words, values are count (integer).
> 
> i'm wondering if i can have a 10s of these in memory, 

Depends on how much memory your machine has.

> or if i should proceed one after the other.

Obviously that's more memory friendly if you can do it that way.

> from itertools import izip
> pairs = izip(d.itervalues(), d.iterkeys())
> for v, k in reversed(sorted(pairs)):
>     print k, v
> 
> or will it be the same as building the whole list ?

I think the above is pretty good.  sorted necessarily builds and
returns a list, but itervalues/iterkeys, izip, and reversed, just
build small iterator objects.

If the lists are really large, your next step after the above is
probably to use an external sort, but 150000 entries is not that many,
and anyway if sorting is a strain on available memory, then having the
dicts in memory at all will probably also be a strain.  Maybe you
should start looking into storing the dict contents externally, such
as in a database.


From sjmachin at lexicon.net  Thu Nov  9 20:34:19 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 17:34:19 -0800
Subject: pack a three byte int
In-Reply-To: <1163120944.551169.293230@h48g2000cwc.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163120944.551169.293230@h48g2000cwc.googlegroups.com>
Message-ID: <1163122459.492898.13090@e3g2000cwe.googlegroups.com>


p.lavarre at ieee.org wrote:
> Speaking as the OP, perhaps I should mention:
>
> > > [-3:] to [1:] is a minor cosmetic improvement
>
> To my eye, that's Not an improvement.
>
> '\x08' '\x01\x23\x45' '\x80' '\0' is the correct pack of (0x08,
> 0x12345, 0x80, 0) because '\x01\x23\x45' are the significant low three
> bytes of a big-endian x12345, thus [-3:].
>
> The [1:] fact that we can keep the 3 significant bytes by tossing
> exactly 1 byte away after rounding the bit length of that digital
> number up to the nearest power of two which happens to be 4 = 3 + 1 is
> merely incidental - not of central significance.

I said *cosmetic* improvement and also said "obscures the underlying"
need-to-know that 4 - 3 == 1 (which I didn't contemplate needing 2
paragraphs of laborious explanation).



From leo at snorland.com  Sun Nov  5 08:36:18 2006
From: leo at snorland.com (Snor)
Date: 5 Nov 2006 05:36:18 -0800
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <eicmsb$d9g$1@wake.carmen.se>
References: <1162120762.477120.275320@e3g2000cwe.googlegroups.com>
	<eicmsb$d9g$1@wake.carmen.se>
Message-ID: <1162733778.448053.172820@m73g2000cwd.googlegroups.com>

> You got a lot of long-winded replies, but the short reply is that
> Twisted has packaged solutions for this. Seehttp://twistedmatrix.com/projects/core/enterprise
>
>   "Twisted provides an interface to any Python DB-API 2.0 compliant
> database through an asynchronous interface which allows database
> connections to be used, and multiplexed by multiple threads, while still
> remaining thread-safe for use with Twisted's event-based main loop.
> Twisted Enterprise provides these services by leveraging Twisted
> Internet's utilities for managing thread pools and asynchronous
> programming."

Thanks for this - exactly what I needed. Thanks for the other replies
too even if they weren't so much help :)



From sjmachin at lexicon.net  Wed Nov 15 17:48:34 2006
From: sjmachin at lexicon.net (John Machin)
Date: 15 Nov 2006 14:48:34 -0800
Subject: ANN: pyfaq 1.0b1 is now available
References: <mailman.212.1163628519.32031.python-list@python.org>
Message-ID: <1163630914.818184.210590@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
> After incorporating more than 60 comments, adding a bunch of new
> articles, and having made a ludicrous amount of minor edits and
> tweaks, I'm happy to announce a first "beta" release of the new
> Python FAQ:
>
>      http://effbot.org/pyfaq/
>
> Many thanks to everyone who's contributed this far!
>

UnicodeDecodeError, UnicodeEncodeError:

I was about to ask mildly the other day whether a c.l.py poster had
RTFFAQ when I thought "Hmmm long while since I'd RTFFAQ myself, better
have a peep". Shock/horror; couldn't find "UnicodeEncodeError" -- why
not? See below:

FAQ: What does 'UnicodeError: ASCII [decoding,encoding] error: ordinal
not in range(128)' mean?

Python:

Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
| >>> str(u'\xff')
UnicodeError: ASCII encoding error: ordinal not in range(128)

Python 2.3.5 (#62, Feb  8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)]
on win32
| >>> str(u'\xff')
UnicodeEncodeError: 'ascii' codec can't encode character u'\xff' in
position 0:
ordinal not in range(128)

=======

P.S. Great job on the wiki, and yes a search facility a tad smarter
than browser Ctrl-F would be a very good idea!

Cheers,
John



From __peter__ at web.de  Fri Nov 10 03:39:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Nov 2006 09:39:39 +0100
Subject: to Doctest as SystemExit is to Python
References: <1163136324.202924.165630@k70g2000cwa.googlegroups.com>
Message-ID: <ej1drr$64p$00$1@news.t-online.com>

p.lavarre at ieee.org wrote:

> Can I somehow tell doctest that it's time to quit?

Hit Ctrl-C. Or raise a KeyboardInterrupt:

import sys

class ExitDoctest(KeyboardInterrupt):
    pass

def f(what):
    """
    >>> f("alpha")
    'alpha'
    >>> f("e")
    'e'
    >>> f("x")
    'x'
    >>> f("X")
    'X'
    >>> f("beta")
    'beta'
    """
    if what == "e":
        raise Exception
    elif what == "x":
        sys.exit()
    elif what == "X":
        raise ExitDoctest("You're in trouble")
    return what

if __name__ == "__main__":
    import doctest
    try:
        doctest.testmod()
    except ExitDoctest, e:
        print >> sys.stderr, e

Peter


From gagsl-py at yahoo.com.ar  Thu Nov  9 13:29:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 15:29:42 -0300
Subject: newbie class-building question
In-Reply-To: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
References: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109152728.04158d68@yahoo.com.ar>

At Thursday 9/11/2006 09:30, jrpfinch wrote:

>I am constructing a simple class to make sure I understand how classes
>work in Python (see below this paragraph).
>
>It works as expected, except the __add__ redefinition.  I get the
>following in the Python interpreter:
>
> >>> a=myListSub()
> >>> a
>[]
> >>> a+[5]
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>TypeError: 'str' object is not callable
> >>>
>
>     def __getattr__ (self,attrib):
>         return getattr(self.wrapped,attrib,'attribute not found')

This is the culprit; should raise AttributeError when not found, not 
return a string.
Just return getattr(self.wrapped, attrib) and let the error propagate.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From michael at stroeder.com  Fri Nov 17 13:39:20 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 17 Nov 2006 19:39:20 +0100
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
Message-ID: <o7c134-ceb.ln1@nb2.stroeder.com>

walterbyrd wrote:
> I think I have read somewhere that using Python to develop
> web-applications requires some restarting of the Apache server, whereas
> PHP does not.

Using Python to develop web-applications is a very broad topic.

E.g. you don't have to restart Apache if you develop simple
short-running CGI-BIN programs. With a long-running web app (e.g. with
FastCGI) you might only kill the web app's process etc. Or you implement
a graceful restart in your web app or...

> Also, I seem to remember reading something about PHP being able to
> recover from Apache restarting  more easily than Python.

As usual it depends.

Ciao, Michael.


From __peter__ at web.de  Tue Nov  7 02:35:29 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 07 Nov 2006 08:35:29 +0100
Subject: Nested Dictionary Sorting
References: <mailman.1830.1162876987.11739.python-list@python.org>
Message-ID: <eipcvm$i7k$02$1@news.t-online.com>

Sam Loxton wrote:

> I am fairly new to the python language and am trying to sort a nested
> Dictionary of a Dictionary which I wish to sort by value. The dictionary
> does not have to be restructured as I only need it sorted in this way
> for printing purposes.
> 
> The following is an example of my Dictionary printed with 'print
> dictionary.items()', where '2329513' is the key of the first hash, 'ops'
> is the key of the second hash and '50.0' is the value of the second hash
> which I would like to sort by:
> [('2329513', {'ops': 20.0}), ('2329492', {'ops': '80'}), ('2329490',
> {'ops': '50'})]
> 
> I hope to sort these first keys by the value of the 'ops' key from
> highest to lowest value to give the following result:
> [('2329492', {'ops': '80'}), ('2329490', {'ops': '50'}), ('2329513',
> {'ops': 20.0})]

If Dennis' remarks don't apply because you simplified your problem for the
post:

>>> d = {'2329513': {'ops': 20.0}, '2329492': {'ops': '80'}, '2329490':
{'ops': '50'}}
>>> items = d.items()
>>> def key(item):
...     return item[1]["ops"]
...
>>> items.sort(key=key, reverse=True)
>>> items
[('2329492', {'ops': '80'}), ('2329490', {'ops': '50'}), ('2329513', {'ops':
20.0})]

Peter


From george.sakkis at gmail.com  Mon Nov 13 03:59:40 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 13 Nov 2006 00:59:40 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<mailman.38.1163402844.32031.python-list@python.org>
Message-ID: <1163408380.747399.18750@h54g2000cwb.googlegroups.com>

Fredrik Lundh wrote:

> George Sakkis wrote:
>
> > The base object class would be one candidate, similarly to the way
> > __nonzero__ is defined to use __len__, or __contains__ to use __iter__.
> >
> > Alternatively, iter() could be a wrapper type (or perhaps mixin)
> > instead of a function, something like:
>
> so you're proposing to either make *all* objects respond to "+", or
> introduce limited *iterator* algebra.

If by 'respond to "+"' is implied that you can get a "TypeError:
iterable argument required", as you get now for attempting "x in y" for
non-iterable y, why not ? Although I like the iterator algebra idea
better.

> not sure how that matches the OP's wish for "mostly backwards
> compatible" support for *iterable* algebra, really...

Given the subject of the thread, backwards compatibility is not the
main prerequisite. Besides, it's an *extension* idea; allow operations
that were not allowed before, not the other way around or modifying
existing semantics. Of course, programs that attempt forbidden
expressions on purpose so that they can catch and handle the exception
would break when suddenly no exception is raised, but I doubt there are
many of those...

George



From mail at microcorp.co.za  Fri Nov 17 03:07:13 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 10:07:13 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <035701c70a1f$64040f00$03000080@hendrik>

"Stephan Kuhagen" <nospam at domain.tld> wrote:


> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. All those limits are managed by the interpreter for script code
> and hence can be limited for untrusted code by the interpreter. This also
> does not really make DoS impossible (what about C extensions? - maybe
> restricting "import"?). - As I said before in this thread, making a sandbox
> really secure is a hard job, and may need some serious changes in the
> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
> to have.

I seem to recall previous discussion on this group about a thing called the
bastion module,
and that it was deprecated.  Not sure if it has any relevance.

- Hendrik




From ask at me  Mon Nov  6 21:35:29 2006
From: ask at me (alf)
Date: Mon, 06 Nov 2006 20:35:29 -0600
Subject: sound process moduls in python ?
In-Reply-To: <mailman.1826.1162863772.11739.python-list@python.org>
References: <mailman.1826.1162863772.11739.python-list@python.org>
Message-ID: <avGdnaTmXtBsbdLYnZ2dnUVZ_oidnZ2d@comcast.com>

fdu.xiaojf at gmail.com wrote:
> Hi,
> 
> When I was talking with my friend, I wanted to share the music I'm 
> listening with
> my friend. I mean, I wanted my friend to hear my music and my own sound .
> 
> I order to achieve this, I think I need to append the output of my sound 
> card to
> the input of the sound card.
> 
> My questions:
> 
> 1. Is my idea possible ?
> 
> 2. Which sound processing module is capable to do this ? The module 
> should at least
> available at Windows platform.
> 
> Thanks !
> 
> xiaojf

try pymedia - there are a lot of examples


From anthra.norell at vtxmail.ch  Thu Nov  2 09:00:33 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 02 Nov 2006 15:00:33 +0100
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
Message-ID: <4549FA01.4090706@vtxmail.ch>

Some time ago I had managed to upload a small package to the Cheese Shop 
using the data entry template. Uploading is in two steps: first the text 
then the package file. When I had a new version it went like this: The 
new text made a new page, but the new file went to the old page. The old 
page then had both files and all attempts at uploading the new file to 
the new page failed with the error message that a file could not be 
uploaded if it was already there. So I let it go and handed out the url 
of the old page, figuring that given the choice of two versions, picking 
the latest one was well within the capabilities of anyone.
      One downloader just now made me aware that the new version had 
misspelled extensions 'PY'. They should be lower case. So I fixed it an 
tried to exchange the file. One hour later I have three text pages, 
headed V2,2beta, V2,2beta/V2.3  and V2.3. The first (oldest) page has 
the old package file. The two other pages have no files. The new version 
package is gone, because, prior to re-uploading I was asked to delete 
it. The re-upload fails on all three pages with the message: 'Error 
processing form, invalid distribution file'. The file is a zip file made 
exactly the way I had made and uploaded the ones before. I am banging my 
real head against the proverbial wall. This thing definitely behaves 
erratically and I see no alternative other than to stop banging and go 
to the gym to take my anger out at machines and when I come back in an 
hour, I wish a kind, knowledgeable soul will have posted some good 
advice on how to vanquish such stubborn obstinacy. I have disseminated 
the url and the thought that someone might show up there and not find 
the promised goods make me really unhappy.
      Until such time as this upload is made, I will be happy to send 
SE-2.3 out off list by request. 

Infinite thanks

Frederic




From lardissone at gmail.com  Wed Nov 29 11:26:51 2006
From: lardissone at gmail.com (Leandro Ardissone)
Date: 29 Nov 2006 08:26:51 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <slrnemranj.o0.horpner@FIAD06.norwich.edu>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
	<slrnemranj.o0.horpner@FIAD06.norwich.edu>
Message-ID: <1164817610.856109.199870@h54g2000cwb.googlegroups.com>

Thanks,

I don't store Python objects in xml, but I get an object from a library
that parses xml and converts it to objects.


On Nov 29, 12:43 pm, Neil Cerutti <horp... at yahoo.com> wrote:
> On 2006-11-29, Grant Edwards <gra... at visi.com> wrote:
>
> > On 2006-11-29, Leandro Ardissone <lardiss... at gmail.com> wrote:
>
> >> I want to know what type is a variable. For example, I get the
> >> contents of an xml but some content is a list or a string, and
> >> I need to know what type it is.
>
> >>>> x = 'asdf'
> >>>> type(x)
> ><type 'str'>
> >>>> i = 0
> >>>> type(i)
> ><type 'int'>That makes me wonder how he manages to store Python objects in
> xml.
> 
> --
> Neil Cerutti



From webraviteja at gmail.com  Sun Nov  5 17:50:40 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Nov 2006 14:50:40 -0800
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
Message-ID: <1162767040.246506.29680@i42g2000cwa.googlegroups.com>

Omar wrote:
> I'm looking for a programming language or module that sorta looks and
> feels like MS Excel (I love and think in tables), yet has the power and
> open-endedness of python or javascript.  I'm still pretty new to
> python.

PyCells
http://pycells.pdxcb.net/
http://pycells.pdxcb.net/wiki/index.php?title=Basic_Tutorial

> any ideas?  i've been having some fun with VBA in excel
> but I want something I can save as en exe and call my own creation, y'know?

You can also do Excel automation using Python.
http://www.markcarter.me.uk/computing/python/excel.html

There are many packaging tools for Python. Py2exe is the most popular.
Although in Excel's case, it would be difficult to make stand alone.



From steve at holdenweb.com  Thu Nov  2 22:28:40 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Nov 2006 03:28:40 +0000
Subject: what's the difference between these two methods? (aka,   why
	doesn't one of them work?)
In-Reply-To: <454ab2e3$0$17722$c3e8da3@news.astraweb.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>	<eidlah$v0m$01$1@news.t-online.com>	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>	<mailman.1692.1162502583.11739.python-list@python.org>	<1162502862.141973.324040@h48g2000cwc.googlegroups.com>	<mailman.1693.1162503254.11739.python-list@python.org>
	<454ab2e3$0$17722$c3e8da3@news.astraweb.com>
Message-ID: <eiecv1$val$1@sea.gmane.org>

John Salerno wrote:
> Fredrik Lundh wrote:
> 
>>JohnJSal wrote:
>>
>>
>>>That's a perfectly valid comment, but in this case just not applicable.
>>>I spent a lot of time working through my original question before
>>>posting, but I just couldn't get it.
>>
>>how do you fit "a lot of time" into 18 minutes?
>>
>></F>
>>
> 
> Hmmm, I had tried to cancel sending that post but I guess it didn't 
> work. As I was sending it, I said to myself, "well, maybe I didn't spend 
> enough time before asking."
> 
> But I guess rather than "a lot of time", I'm thinking I tried "a lot of 
> things," or at least all I could think of.

Don't worry. It's sometimes difficult for the effbot to remember we 
aren't all as fearsomely intelligent as it is. I think it does a 
remarkably complete emulation of a human being:

   http://www.flickr.com/photos/30842681 at N00/152495923/

For what it's worth it's also amazingly helpful if you can ignore to 
sometimes acerbic wit.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Fri Nov 10 12:12:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 18:12:55 +0100
Subject: range syntax
In-Reply-To: <ej23gl$du9$1@sea.gmane.org>
References: <ej23gl$du9$1@sea.gmane.org>
Message-ID: <ej2buo$fdo$1@sea.gmane.org>

Colin J. Williams wrote:

> One of the little irritants of Python is that the range syntax is rather 
> long-winded:
> [Dbg]>>> range(3, 20, 6)
> [3, 9, 15]
> [Dbg]>>>
> It would be nice if one could have something like 3:20:6.

if you find yourself using range a lot, maybe you should check if you 
couldn't use custom iterators more often.

or use the R helper:

 >>> R[3:20:6]
[3, 9, 15]
 >>> R[:20]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
 >>> R[0:20:2]
[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]
 >>> R[1:20:2]
[1, 3, 5, 7, 9, 11, 13, 15, 17, 19]

where R is defined as:

 >>> class R:
...     def __getitem__(self, slice):
...             return range(*slice.indices(slice.stop))
...
 >>> R = R()

</F>



From mike.klaas at gmail.com  Fri Nov  3 23:54:07 2006
From: mike.klaas at gmail.com (Klaas)
Date: 3 Nov 2006 20:54:07 -0800
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <1162590153.024233.311670@b28g2000cwb.googlegroups.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
Message-ID: <1162616047.891549.29550@b28g2000cwb.googlegroups.com>

vd12005 at yahoo.fr wrote:
> thanks for your replies :)
>
> so i just have tried, even if i think it will not go to the end => i
> was wrong : it is around 1.400.000 entries by dict...
>
> but maybe if keys of dicts are not duplicated in memory it can be done
> (as all dicts will have the same keys, with different (count) values)?

Definitely a good strategy.  The easiest way is to use intern(key) when
storing the values.  (This will only work if you are using 8bit
strings.  You'll have to maintain your own object cache if you are
using unicode).

I've reduced the memory requirements of very similar apps this way.
-Mike



From exarkun at divmod.com  Fri Nov  3 21:49:26 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 3 Nov 2006 21:49:26 -0500
Subject: Physical constants
In-Reply-To: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>
Message-ID: <20061104024926.20948.1941857033.divmod.quotient.12543@ohm>

On Fri, 3 Nov 2006 18:57:49 -0500, Tommy Grav <tgrav at mac.com> wrote:
>I have some code for doing orbital computations. The code is kind of
>extensive with many classes, each having several functions. In these
>functions I need to use constants (like the gravitational constant).
>What is the best way of implementing a solution when constants are
>used in several different classes and functions? I do not want to
>pass the constant down through the functions. I have thought of
>making a class of constants but I do not want to invoke an
>instant in each function. How is the pi and e constants in math
>coded?

FWIW,

http://twistedmatrix.com/trac/browser/sandbox/exarkun/physics/point.py

Are you working on something similarly general?  I'd be interested to
take a look at your code if so.  In my spare time I'm working on some
simulation code that would probably benefit from something more correct
than what's at the above URL.

Jean-Paul


From luismgz at gmail.com  Mon Nov  6 17:26:46 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 6 Nov 2006 14:26:46 -0800
Subject: Learning Python
In-Reply-To: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
Message-ID: <1162852006.144011.287990@k70g2000cwa.googlegroups.com>


kaushal wrote:
> Hi
>
> How do i start Learning Python,is there any reference material which I
> can refer since I dont have
> any programming experience
>
> Thanks and Regards
>
> Kaushal

If you have no programming experience at all, I highly recomend "Non
Programmers Tutorial for Python" by Josh Cogliati:
http://www.honors.montana.edu/~jjc/easytut/easytut/easytut.html

This is how I got my feet wet with Python, and it's very easy to
follow.

I also recomend "A Byte of Python" by Swaroop:
http://swaroopch.info/text/Byte_of_Python:Main_Page

Both ebooks are available in multiple formats and are free.
God luck!
Luis



From bignose+hates-spam at benfinney.id.au  Mon Nov 27 00:08:16 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 27 Nov 2006 16:08:16 +1100
Subject: test message
References: <9fckm2p839oh7c586t93c9fn3lfppu43g3@4ax.com>
	<456A5A1D.60309@NOSPAMwit.edu>
Message-ID: <87slg5schr.fsf@benfinney.id.au>

Jordan Greenberg <greenbergj at NOSPAMwit.edu> writes:

> john.smith at nowhere.com wrote:
> > This is a test message, please ignore.
>
> I could do that, but reminding you that test messages go in *.test
> groups is way more fun.

I'm betting that the test message was to the Python mailing list, not
a Usenet group. Unlike for Usenet, where being able to send a message
to one newsgroup is a strong indication that most others will also
work, a test message to one mailing list says very little about
ability to send messages to other mailing lists.

-- 
 \          "If nothing changes, everything will remain the same."  -- |
  `\                                                       Barne's Law |
_o__)                                                                  |
Ben Finney



From sjmachin at lexicon.net  Thu Nov 30 13:42:13 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 10:42:13 -0800
Subject: Automatic increment
In-Reply-To: <mailman.887.1164910099.32031.python-list@python.org>
References: <mailman.887.1164910099.32031.python-list@python.org>
Message-ID: <1164912133.892374.308460@f1g2000cwa.googlegroups.com>


Gheorghe Postelnicu wrote:
> Hi,
>
> I have a situation of the following type:
>
> for line in lineList:
>     for item in line.split()
>         myArray[counter, itemCounter]

What do you imagine that the above line is doing? Alternatively, should
you be posting in comp.lang.somelanguageotherthanPython ?


>         itemCounter = itemCounter + 1
>     counter = counter +1
>
> Is there a way to get rid of the manual incrementation of the 2 counters?

You could have saved some wear and tear on your pinkies by doing e.g.
itemCounter += 1

Cheers,
John



From no-spam at no-spam-no-spam.invalid  Thu Nov 23 15:29:02 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 23 Nov 2006 21:29:02 +0100
Subject: python gaining popularity according to a study
In-Reply-To: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
Message-ID: <ek50ag$q3l$1@news.albasani.net>

ccdetail at gmail.com wrote:
> http://www.tiobe.com/index.htm?tiobe_index
> 
> Python is the 7th most commonly used language, up from 8th.
> The only one gaining ground besides VB in the top 10.
> 
> We're glad, our app is written in python.
> It's free at http://pnk.com and it is a web timesheet for project
> accounting

The real comparision is vs. Ruby. Seems, Ruby has won an important race because of this Rails thing. 
Both, the Ruby language and this thing are weak compared to Python side in almost any aspect (just better than dull LAMP).
But they have managed to raise a single-minded marketing and focus. 

When a LAMP programmer comes to Python, there are so many different confusing things. 
It starts with a 'non-documented' cgi module - a 'High-Level-Interface', that cannot even iterate over the form items. 
A name ZOPE in focus which reveals to be a monster system with 2-year learning-curve, ready for running an article editorial system for TOP-10 newspaper companies, but unable to make simple things simple.
A handful of different Djangos - choose one for each weekday and programmer ...
And Ruby made it with this single-known simple URL-to-method-router (And possibly when coming from PHP & Perl one recognizes ::@$_$%??%/&... and the old namespace dirt)
If there would have been a good cgi-system and a somewhat comfortable advanced URL-to-OO-router (beyond the socket wrapper HTTPServer) well exposed in the Python standard lib, the numbers would be probably very different today ... 

Flat Web/DB programming is one major field where programmer masses are born.
The other big one is RAD-GUI/DB programming. This field is probably still wide open. Best tooled Borland RAD systems are going down meanwhile because of the stiff compiler language. Programmers look around for the next language & toolset. Python is the language - but with Python there is again a similar confusion around IDE's and GUI-libs. There is no really good IDE (but fat ones). And the major gui libs there are not Python, but are fat sickening layers upon layers upon other OO-langs. ==> VB went up.
Maybe Borland should go towards a Python GUI/IDE system ...

Python is probably (still) the best _language_ within that top 20 for most purposes. Richest set of libraries probably. 
It would be by far the best language for Web and Gui programming as well.
But the Python community has missed to create focus regarding a few must-be-sharp knifes.

The only area with appropriate Python success is probably sci programming.
And there is 2nd-level network programming and some glueing, where Python gathers numbers mostly because of merely the superior language itself.

Python is undersold und the key tools are somewhat too bloomy and fragmented for successful professional application.


Robert


From SSchukat at dspace.de  Sat Nov 11 16:15:02 2006
From: SSchukat at dspace.de (Stefan Schukat)
Date: Sat, 11 Nov 2006 22:15:02 +0100
Subject: Python opening multiple thread of matlab
In-Reply-To: <1163253376.388256.146310@h54g2000cwb.googlegroups.com>
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB9023171@exchange2003.dspace.de>

Hello, 

you just forgot to initialize the COM runtime for the separate thread. 
try following:

    def __init__(self,matlab_command):
        self.matlab_command = matlab_command
        threading.Thread.__init__(self)
 
    def run(self):
	  import pythoncom
	  pythoncom.CoInitialize()
        try:
		matlab_object = Dispatch('matlab.application.single')
            execute = getattr(matlab_object,'Execute')
            execute(self.matlab_command)
        finally:
            matlab_object = None
            pythoncom.CoUnitialize()


	Stefan
 

> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org 
> [mailto:python-list-bounces+sschukat=dspace.de at python.org] On 
> Behalf Of tsjuan
> Sent: Saturday, November 11, 2006 2:56 PM
> To: python-list at python.org
> Subject: Python opening multiple thread of matlab
> 
> Hello Python Users,
> 
> I've been trying to run multiple thread of Matlab by calling 
> its com object via python. However, I keep getting error 
> message that says Python can't find the attribute of certain 
> function that I want to execute in Matlab.
> 
> I know the com function is exist, it works just fine if I 
> don't run within thread.
> Below is my sample code, any helps or comments are appreciated.
> 
> Thanks,
> Tanto
> 
> import threading
> from win32com.client import Dispatch
> 
> 
> class MyThread ( threading.Thread ):
> 
>    def __init__(self,matlab_command):
>        self.matlab_command = matlab_command
>        self.matlab_object = Dispatch('matlab.application.single')
>        threading.Thread.__init__(self)
> 
>    def run(self):
>        execute = getattr(self.matlab_object,'Execute')
>        execute(self.matlab_command)
> 
>    def awesome_dud(self):
>        execute = getattr(self.matlab_object,'Execute')
>        execute(self.matlab_command)
> 
> 
> a = MyThread('a=1:1:100')
> b = MyThread('b=1:1:200')
> 
> # Running matlab function through thread (It's not working) # 
> =========================================================
> 
> a.start()
> b.start()
> a.join()
> b.join()
> 
> # Running matlab function not through thread (it's working) # 
> =========================================================
> a.awesome_dud()
> b.awesome_dud()
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


From anthra.norell at vtxmail.ch  Fri Nov  3 13:33:49 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 03 Nov 2006 19:33:49 +0100
Subject: ANN: SE 2.3. Available now
In-Reply-To: <eifrs9$gb0$1@sea.gmane.org>
References: <454B3B49.6070702@vtxmail.ch> <454B6FEC.20709@islandtraining.com>
	<eifrs9$gb0$1@sea.gmane.org>
Message-ID: <454B8B8D.8010406@vtxmail.ch>

Fredrik Lundh wrote:
> Gary Herron wrote:
>
>   
>> As a matter of polite netiquette, a message like this really ought to
>> have a paragraph telling us what SE *is*.    (Unless it's a secret :-))
>>     
>
> nah, if you've spent more than five minutes on c.l.python lately, you'd 
> noticed that it's the Solution to Everything (up there with pyparsing, I 
> think).
>
> </F>
>
>   
And here's the proof I am being perceived as a nuisance. I apologize, 
keeping to myself that I don't care.

Frederic




From Eric_Dexter at msn.com  Thu Nov  2 02:21:22 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 1 Nov 2006 23:21:22 -0800
Subject: The Python Journal
In-Reply-To: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
References: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
Message-ID: <1162452082.061921.61530@m73g2000cwd.googlegroups.com>

I think I saw one of the articles twice.  It is good to see a python
journal again, even better with free content.  It would be good to see
more 'populist' content, even transcripts of python 411 maybe.  I would
also like to note if they could be organised as hpp (or whatever
extension the help files are) maybe spe or boa-constructor could make
it easy for users to add it to there help systems.  I thought I saw an
internet publisher somewhere that could get you the isbn (if that is
the right number) so that content could also get distributed as hard
copy.

https://sourceforge.net/projects/dex-tracker

tleeuwenburg at gmail.com wrote:
> To whom it may concern,
>
> I have been involved in putting together a new Python journal, called
> (oh so originally) The Python Journal. This isn't related to a previous
> project also called The Python Journal although we have the approval of
> the group that put it together in using their name.
>
> http://pyjournal.cgpublisher.com is the journal URL, and it has a
> number
> of news feeds -- blog entries, new products (i.e. articles and volumes)
> and product reviews (not used currently).
>
> We'd love it if you could have a look at our first issue, and let us
> know what you think!
> 
> Cheers,
> -T (editor-in-chief)



From scbauer at gmail.com  Wed Nov 22 19:16:07 2006
From: scbauer at gmail.com (scbauer)
Date: 22 Nov 2006 16:16:07 -0800
Subject: AVL Balancing
In-Reply-To: <1164240291.176865.82670@l39g2000cwd.googlegroups.com>
References: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
	<1164158188.787394.25990@b28g2000cwb.googlegroups.com>
	<1164240291.176865.82670@l39g2000cwd.googlegroups.com>
Message-ID: <1164240967.634513.66200@b28g2000cwb.googlegroups.com>

This is one of the errors that im getting

Traceback (most recent call last):
  File "<pyshell#49>", line 1, in <module>
    t.insert(5)
  File "/Users/stevenbauer/Desktop/AVL.py", line 68, in insert
    stack.append(current)
NameError: global name 'stack' is not defined



From tim at tdw.net  Wed Nov  8 19:38:24 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 9 Nov 2006 00:38:24 +0000
Subject: help using smtplib to work ..
In-Reply-To: <W57130154.140.18933.3@mxextra>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<455263B5.9080704@websafe.com> <R57127071.468.21846.1@mxextra>
	<9afea2ac0611081554l56e8da5hfa4dd43c02e76a73@mail.gmail.com>
	<W57128886.376.18907.3@mxextra>
	<9afea2ac0611081617xa87e370se273261c76b7163c@mail.gmail.com>
	<W57130154.140.18933.3@mxextra>
Message-ID: <9afea2ac0611081638x5fbbb2eep3988b12643b2af81@mail.gmail.com>

On 09/11/06, Nicolas G <nicolasg at gmail.com> wrote:
>
>
> >
> > Usually when sending/relaying without authentication,  the From is
> > irrelevant, only the To is taken into account.  Maybe, GMAIL do
> > something different because they have to put the mail in the sender's
> > mailbox as well as the recipient's.   Some ISPs will only allow a
> > local FROM address though.
> >
> > As we're only talking about the envelope TO & FROM, you could try no
> > FROM address (None or <> I forget which Smtplib needs) .
>
> If I left From empty I don't get any error but I still don't receive any
> message.
>
> >  The header FROM can still have the real FROM address in it, as its not
> (normally)
> > used during SMTP relaying.
>
> How you can explain that only for some address in the From field I can
> receive mails' and from others I can't ?
> It looks really weird to me...

It must be down to how gmail's server(s) work.

> Other question : Suppose I use the login procedure, the password will be
> vulnerable to attacks ? If I'm right I think when no ssl is used for
> authentication some one can easy see the password just by sniffing the
> packets.

I think the risk is low to be honest.   However, smtp.gmail.com uses
TLS (SSL) on ports 465 or 587.   You can call STARTTLS from within
smtplib.  but TrevorP's TLS-lite extensions to smtplib handle it
better

http://trevp.net/tlslite/

:)


From lycka at carmen.se  Thu Nov  9 04:01:06 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Nov 2006 10:01:06 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <eiklvo$5uj$1@hefestos.uned.es>
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <eiuqoi$al8$1@wake.carmen.se>

Ernesto Garc?a Garc?a wrote:
> list = [1,2,3,4,5,6]

Just a nit-pick: It's considered an anti-idiom
to hide builtins just as list by using it as a
name for a variable.

 >>> list=[1,2,3,4,5]
 >>> tuple = (1,2,3,4,5)
 >>> if list == list(tuple): print "equal"
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: 'list' object is not callable
 >>> #ouch!
...
 >>> l=list
 >>> del list
 >>> if l == list(tuple): print "equal"
...
equal
 >>> if tuple(l)==tuple: print "equal"
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: 'tuple' object is not callable
 >>> t=tuple
 >>> del tuple
 >>> if tuple(l)==t: print "equal"
...
equal


From gagsl-py at yahoo.com.ar  Thu Nov  9 20:20:50 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 22:20:50 -0300
Subject: object data member dumper?
In-Reply-To: <4553c583$0$12165$88260bb3@free.teranews.com>
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
	<mailman.1864.1162938322.11739.python-list@python.org>
	<45510cc9$0$12164$88260bb3@free.teranews.com>
	<mailman.1872.1162953565.11739.python-list@python.org>
	<4553c583$0$12165$88260bb3@free.teranews.com>
Message-ID: <7.0.1.0.0.20061109222013.0593b418@yahoo.com.ar>

At Thursday 9/11/2006 22:16, tom arnall wrote:

> > I'd suggest you instead consider a mixin object that will add recursive
> > data dump functionality to any such classes you require.
>
>have googled a fair amount on 'mixin' but still stumped on it.

Try again using "mixin class"


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Wed Nov  1 10:29:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 16:29:07 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <4qrsafFo961qU1@individual.net>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>	<mailman.1563.1162321248.11739.python-list@python.org>	<4qrln8Fo2ollU1@individual.net>	<mailman.1593.1162387930.11739.python-list@python.org>
	<4qrsafFo961qU1@individual.net>
Message-ID: <eiaeg5$3ph$1@sea.gmane.org>

Bjoern Schliessmann wrote:

>> define "it".
> 
> Sorry! I mean iterating over a list and having the list index
> available in the loop. Like:
> 
> for i, thing in enumerate(things):
>     pass

"enumerate" is the obviously right thing for this, sure.  but it's not 
necessarily the right thing for the OP's "I want to create a new list 
based on an existing list".  modifying the existing list is usually not 
the most efficient way to do that.

</F>



From irfan.habib at gmail.com  Thu Nov 16 05:21:40 2006
From: irfan.habib at gmail.com (irfan.habib at gmail.com)
Date: 16 Nov 2006 02:21:40 -0800
Subject: split CSV fields
In-Reply-To: <ejhduq$l5l$1@news.albasani.net>
References: <ejhduq$l5l$1@news.albasani.net>
Message-ID: <1163672500.484743.6320@h54g2000cwb.googlegroups.com>


s.split(',');
robert wrote:
> What is a most simple expression for splitting a CSV line with "-protected fields?
> 
> s='"123","a,b,\"c\"",5.640'



From rmardhani at claddaghresources.net  Mon Nov  6 11:20:04 2006
From: rmardhani at claddaghresources.net (RM)
Date: 6 Nov 2006 08:20:04 -0800
Subject: Full-time Python DEVELOPER needed - High-transactional environment
Message-ID: <1162830004.736521.112670@k70g2000cwa.googlegroups.com>

Hello Python users,

We are currently looking for a PYTHON DEVELOPER in Cleveland, OH. The
full-time position is with a LARGE CLIENT (situated in over 17
countries and headquartered in Cleveland) currently in a high-growth
mode and is WORLD's leading Internet Content Providing firm

The client offers attractive salary and great benefits, plus a creative
and flexible work environment

We are looking for candidates with strong OO background in Python /
Java / C++ / other OO language along with backend experience


If you would like to find out more about the position and/or the
client, kindly give me a call at the number listed below and send me a
copy of your resume for review.


Thank you for your time, I look forward to hearing from you soon.

Kind Regards,
Rozina Mardhani
Sr. Recruiter
Claddagh Resources
678-405-4400 Ext. 211
rmardhani at claddaghresources.net



From jblaine at mitre.org  Wed Nov  1 15:39:04 2006
From: jblaine at mitre.org (Jeff Blaine)
Date: Wed, 01 Nov 2006 15:39:04 -0500
Subject: CSV module, DictReader problem (bug?)
Message-ID: <eib0la$86i$1@newslocal.mitre.org>

It's been a year or so since I written Python code, so maybe
I am just doing something really dumb, but...

Documentation
=============

	class DictReader(csvfile[,fieldnames=None,
              [,restkey=None[, restval=None[, dialect='excel'
              [, *args, **kwds]]]]])


	Create an object which operates like a regular reader
	but maps the information read into a dict whose keys
	are given by the optional fieldnames parameter. If the
	fieldnames parameter is omitted, the values in the
	first row of the csvfile will be used as the fieldnames.

Code
====

	import csv

	r = csv.DictReader('C:\Temp\Book1.csv')
	print r.next()
	# EOF

Output
======

	{'C': ':'}


From jorge.vargas at gmail.com  Mon Nov 13 08:45:46 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 13 Nov 2006 09:45:46 -0400
Subject: logging
In-Reply-To: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>
References: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>
Message-ID: <32822fe60611130545pff483f4qd8ae0c102d6b4649@mail.gmail.com>

On 12 Nov 2006 23:50:40 -0800, alain.marcel at svd-info.fr
<alain.marcel at svd-info.fr> wrote:
> Hi all !
> How to remove a logger ?
> There si no logging.removeLogger(name) method.
> I've a lot of objects that create loging.

why you need a logger per object? IMO 1 per package is more then enough.
> When objects are destroyed, associated logger are not. This create
> memory leak...
>
> Thanks for any idea.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From nospam at domain.tld  Wed Nov  8 04:31:15 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Wed, 08 Nov 2006 10:31:15 +0100
Subject: Searching for a module to generate GUI events
Message-ID: <eis853$92c$1@kohl.informatik.uni-bremen.de>

Hello

I'm searching for a Python Module which is able to generate GUI events on
different platforms (at least X11 and Windows, MacOSX would be nice), but
without being a GUI toolkit itself. So PyTk is not a choice, because I need
to use it, to control GUIs of other Programs. I want to generate Mouse
events (move, click etc.) and keyboard events and inject them directly into
the event-queue of the underlying window system. 

Does somebody know such a module or do I have to utilize platform specific
tools from within Python?

Regards and Thanks
Stephan



From assaflavie at gmail.com  Wed Nov  1 07:50:21 2006
From: assaflavie at gmail.com (assaf)
Date: 1 Nov 2006 04:50:21 -0800
Subject: authenticated https post
Message-ID: <1162385421.870142.8680@h48g2000cwc.googlegroups.com>

(warning Python newbie)

I'm trying to use Python to work with del.icio.us's API.
Basically, I need to be able to do a simple https post, with
username/password authentication.
(For those interested, the del.icio.us API is here:
http://del.icio.us/help/api/)

I can't for the life of me find a simple https example code that
works... I'm working on Windows, btw, if that makes any difference.

Appreciate your help,
assaf



From chris.cavalaria at free.fr  Thu Nov  2 10:59:56 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 02 Nov 2006 16:59:56 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <4549ed5c$0$30321$426a74cc@news.free.fr>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
	<4549cf05$0$9363$426a74cc@news.free.fr>
	<slrnekjlva.rj5.sybrenUSE@schuimige.stuvel.eu>
	<4549ed5c$0$30321$426a74cc@news.free.fr>
Message-ID: <454a15f3$0$22107$426a74cc@news.free.fr>

Christophe a ?crit :
> Sybren Stuvel a ?crit :
>> Christophe enlightened us with:
>>> I don't think it's a good idea because when you place a try catch
>>> block around a function call, you'll catch any exception thrown by
>>> the function itself and not only the "cannot be called" exception.
>>
>> That depends on the exception you're catching, doesn't it?
> 
> And what if the function has an error and calls a non callable object ?
Or even worse. Since we have :

 >>> None()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: 'NoneType' object is not callable
 >>> 1+""
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for +: 'int' and 'str'
 >>> ""+1
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: cannot concatenate 'str' and 'int' objects

All of them are TypeError exceptions. It is extremly dangerous to put a 
try except TypeError clause around a function call to catch the case 
where the function object isn't a callable :/


From bernard.chhun at gmail.com  Mon Nov  6 16:56:16 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 6 Nov 2006 13:56:16 -0800
Subject: WebScraping
In-Reply-To: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
References: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <1162850176.711635.172660@m7g2000cwm.googlegroups.com>

yup yup BeautifulSoup is the way to go.

what would you like to scrape by the way?

Graham Feeley wrote:
> Can someone steer me to scripts / modules etc on webscraping please???
> Ultimately I would like someone to write a script for me.
> However i am still searching for documentation on this subject
> Thanks Graham



From rvernica at gmail.com  Wed Nov  1 19:53:01 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Wed, 01 Nov 2006 16:53:01 -0800
Subject: unescape HTML entities
In-Reply-To: <45449EAC.4070103@vtxmail.ch>
References: <ei0add$man$1@sea.gmane.org> <45449EAC.4070103@vtxmail.ch>
Message-ID: <eibfg2$p1c$1@sea.gmane.org>

Hi,

I downloades 2.2 beta, just to be sure I have the same version as you 
specify. (The file names are no longer funny.) Anyway, it does not seem 
to do as you said:

In [14]: import SE

In [15]: SE.version
-------> SE.version()
Out[15]: 'SE 2.2 beta - SEL 2.2 beta'

In [16]: HTM_Decoder = SE.SE ('HTM2ISO.se')

In [17]: test_string = '''
    ....: &oslash;=(xf8)   #  248  f8
    ....: &ugrave;=(xf9)   #  249  f9
    ....: &uacute;=(xfa)   #  250  fa
    ....: &ucirc;=(xfb)    #  251  fb
    ....: &uuml;=(xfc)     #  252  fc
    ....: &yacute;=(xfd)   #  253  fd
    ....: &thorn;=(xfe)    #  254  fe
    ....: &#233;=(xe9)
    ....: &#234;=(xea)
    ....: &#235;=(xeb)
    ....: &#236;=(xec)
    ....: &#237;=(xed)
    ....: &#238;=(xee)
    ....: &#239;=(xef)
    ....: '''

In [18]: print HTM_Decoder (test_string)

&oslash;=(xf8)   #  248  f8
&ugrave;=(xf9)   #  249  f9
&uacute;=(xfa)   #  250  fa
&ucirc;=(xfb)    #  251  fb
&uuml;=(xfc)     #  252  fc
&yacute;=(xfd)   #  253  fd
&thorn;=(xfe)    #  254  fe
&#233;=(xe9)
&#234;=(xea)
&#235;=(xeb)
&#236;=(xec)
&#237;=(xed)
&#238;=(xee)
&#239;=(xef)


In [19]:

Thanks,
Ray



Frederic Rentsch wrote:
> Rares Vernica wrote:
>> Hi,
>>
>> How can I unescape HTML entities like "&nbsp;"?
>>
>> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
>> "&lt;", and "&gt;".
>>
>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>> dictionary is the opposite of what I need, it does not have "&nbsp;".
>>
>> It has to be in python 2.4.
>>
>> Thanks a lot,
>> Ray
>>
> One way is this:
> 
>  >>> import SE                                                      # 
> Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
>  >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
> HTM2ISO.se is included
> 'output_file_name'
> 
> For repeated translations the SE object would be assigned to a variable:
> 
>  >>> HTM_Decoder = SE.SE ('HTM2ISO.se')
> 
> SE objects take and return strings as well as file names which is useful 
> for translating string variables, doing line-by-line translations and 
> for interactive development or verification. A simple way to check a 
> substitution set is to use its definitions as test data. The following 
> is a section of the definition file HTM2ISO.se:
> 
> test_string = '''
> &oslash;=(xf8)   #  248  f8
> &ugrave;=(xf9)   #  249  f9
> &uacute;=(xfa)   #  250  fa
> &ucirc;=(xfb)    #  251  fb
> &uuml;=(xfc)     #  252  fc
> &yacute;=(xfd)   #  253  fd
> &thorn;=(xfe)    #  254  fe
> &#233;=(xe9)
> &#234;=(xea)
> &#235;=(xeb)
> &#236;=(xec)
> &#237;=(xed)
> &#238;=(xee)
> &#239;=(xef)
> '''
> 
>  >>> print HTM_Decoder (test_string)
> 
> ?=(xf8)   #  248  f8
> ?=(xf9)   #  249  f9
> ?=(xfa)   #  250  fa
> ?=(xfb)    #  251  fb
> ?=(xfc)     #  252  fc
> ?=(xfd)   #  253  fd
> ?=(xfe)    #  254  fe
> ?=(xe9)
> ?=(xea)
> ?=(xeb)
> ?=(xec)
> ?=(xed)
> ?=(xee)
> ?=(xef)
> 
> Another feature of SE is modularity.
> 
>  >>> strip_tags = '''
>    ~<(.|\x0a)*?>~=(9)               # one tag to one tab
>    ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
> |                                   # run
>    "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
>    ~\t+~=(32)                       # one or more tabs to one space
>    ~\x20\t+~=(32)                   # one space and one or more tabs to 
> one space
>    ~\t+\x20~=(32)                   # one or more tab and one space to 
> one space
> '''
> 
>  >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
> Order doesn't matter
> 
> If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
> together with HTM2ISO.se:
> 
>  >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
> Order doesn't matter
> 
> Or, if you have two SE objects, one for stripping tags and one for 
> decoding the ampersands, you can nest them like this:
> 
>  >>> test_string = "<p class=MsoNormal 
> style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
> para&icirc;t plus &acirc;g&eacute;. </p>"
> 
>  >>> print Tag_Stripper (HTM_Decoder (test_string))
>   Ren? est un gar?on qui para?t plus ?g?.
> 
> Nesting works with file names too, because file names are returned:
> 
>  >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
> 'output_file_name'
> 
> 
> Frederic
> 
> 
> 



From robert.kern at gmail.com  Wed Nov  1 00:46:06 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 31 Oct 2006 21:46:06 -0800
Subject: Integrating Python with Fortran
In-Reply-To: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>
References: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>
Message-ID: <ei9cbm$jav$1@sea.gmane.org>

unexpected wrote:
> Hi all,
> 
> I'm currently working on a large, legacy Fortran application. I would
> like to start new development in Python (as it is mainly I/O related).
> In order to do so, however, the whole project needs to be able to
> compile in Fortran.
> 
> I'm aware of resources like the F2Py Interface generator, but this only
> lets me access the Fortran modules I need in Python. I'm wondering if
> there's a way to generate the .o files from Python (maybe using
> py2exe?) and then link the .o file with the rest of the Fortran project
> using something like gcc.

There are no tools specifically for embedded Python in Fortran. However, there 
is Elmer, which helps to create a C API for a Python library (essentially the 
inverse of SWIG). One can then wrap that C API with a Fortran-compliant 
interface in the fairly standard ways.

   http://elmer.sourceforge.net/

-- 
Robert Kern

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



From sjdevnull at yahoo.com  Thu Nov  9 00:22:42 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 8 Nov 2006 21:22:42 -0800
Subject: decorators
In-Reply-To: <1163018190.510373.123020@h54g2000cwb.googlegroups.com>
References: <1163018190.510373.123020@h54g2000cwb.googlegroups.com>
Message-ID: <1163049762.235181.186070@f16g2000cwb.googlegroups.com>

John Henry wrote:
> I must be very thick.  I keep reading about what decorators are and I
> still don't have a good feel about it.  See, for example:
>
> http://alex.dojotoolkit.org/?p=564
>
> What exactly do I use decorators for?

Metafunctions.  Saying

@mydecorator
def foo(...):
  ...

is just an alternative way of writing:
def foo(...):
  ...
foo = mydecorator(foo)



From horpner at yahoo.com  Fri Nov 10 09:54:58 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 15:54:58 +0100
Subject: Py3K idea: why not drop the colon?
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
	<mailman.2032.1163167596.11739.python-list@python.org>
Message-ID: <slrnel94nt.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-10, skip at pobox.com <skip at pobox.com> wrote:
>
>     Neil> The colon's main purpose seems to be to allow one-liners:
>
>     Neil> Easy to parse: if a < b: a += 1
>     Neil> Hard to parse if a < b a += 1
>
> No, as the note from Tim Peters referenced by Robert Kern
> pointed out earlier in this thread, the ABC language designers
> found that indentation-based block structure by itself wasn't
> enough to clue new users in about the code structure.  Adding
> the colon at the end of the if/while/for clause helped.

Thanks. I worded that lousily.

-- 
Neil Cerutti
The Minutemen are not tall in terms of height. --Dan Bonner


From environ314 at gmail.com  Sun Nov 26 03:32:53 2006
From: environ314 at gmail.com (Dan)
Date: 26 Nov 2006 00:32:53 -0800
Subject: utf - string translation
In-Reply-To: <1164232741.215312.322990@k70g2000cwa.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
Message-ID: <1164529973.299095.155940@n67g2000cwd.googlegroups.com>

On 22 nov, 22:59, "John Machin" <sjmac... at lexicon.net> wrote:

> > processes (Vigen?re)
> So why do you want to strip off accents? The history of communication
> has several examples of significant difference in meaning caused by
> minute differences in punctuation or accents including one of which you
> may have heard: a will that could be read (in part) as either "a chacun
> d'eux million francs" or "a chacun deux million francs" with the
> remainder to a 3rd party.
>
of course.
My purpose is not doing something realistic on a cryptographic view.
It's for learning rudiments of programming.
In fact, coding characters is a kind of cryptography I mean, sometimes,
when friends can't read an email because of the characters used...

I wanted to strip off accents because I use the frequences of the
charactacters. If  I only have 26 char, it's more easy to analyse (the
text can be shorter for example)



From chris.cavalaria at free.fr  Wed Nov 15 04:08:17 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Wed, 15 Nov 2006 10:08:17 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163537964.142102.327540@m7g2000cwm.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
	<1163353941.3497.45.camel@localhost.localdomain>
	<4558BE80.9010909@hobbshouse.org>
	<mailman.104.1163454913.32031.python-list@python.org>
	<1163466041.196606.254700@i42g2000cwa.googlegroups.com>
	<1163537964.142102.327540@m7g2000cwm.googlegroups.com>
Message-ID: <455ad90a$0$11689$426a74cc@news.free.fr>

Stephen Eilert a ?crit :
> Well, I *hate* underscores with a passion. So it is kinda frustrating
> that I *have* to say "__init__". The fact that the coding conventions
> for Python suggest things such as methods_called_this_or_that do not
> help. Everything else seems fine, since if there's voodoo involved, it
> had best be sticking out from the text in big, bloody, blinking, red
> letters.
> 
> I know, there's noone preventing me from doing otherwise (except for
> that blasted __init__). I'd like to follow the pack here, tho.
I'm sure a carefully crafted metaclass can be used to automaticaly 
convert any init function to __init__ ;)


From george.sakkis at gmail.com  Wed Nov  1 09:33:52 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 1 Nov 2006 06:33:52 -0800
Subject: High level csv reader
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
	<mailman.1589.1162379533.11739.python-list@python.org>
Message-ID: <1162391632.405631.131640@e3g2000cwe.googlegroups.com>

skip at pobox.com wrote:

> George> It occured to me that most times I read a csv file, I'm often
>     George> doing from scratch things like assigning labels to columns,
>     George> mapping fields to the appropriate type, ignoring some fields,
>     George> changing their order, etc.  Before I go on and reinvent the
>     George> wheel, is there a generic high level wrapper around csv.reader
>     George> that does all this ?
>
> I'm not aware of anything that specifically addresses these ideas.  Here are
> some thoughts though:
>
>     * If you use the DictReader class you can ignore fields you aren't
>       interested in more easily since you access the fields of interest by
>       name and with the fieldnames parameter to the constructor can assign
>       column names to csv data which lacks it (use similar functionality in
>       DictWriter to create column labels on output).  You can also specify
>       the restkey parameter to the constructor and thus only specify the
>       fields of interest in the fieldnames parameter.  (I think.  I've never
>       actually used that capability, but that's what the documentation
>       suggests.)
>
>     * There was a thread earlier this month with this subject:
>
>         paseline(my favorite simple script): does something similar exist?
>
>       Check it out for a number of different solutions to formatting the
>       fields in a line of text.  The idea can easily be extended to a list
>       or dict of values instead, perhaps in a subclass of DictReader.
>
> Skip

Indeed, they are both relevant; actually Fredrik's suggestion in that
thread was my starting point. Here's my my current API for the (most
typical) case of fixed-size rows, addressing my most common
requirement, field conversions (no named columns for now):
http://rafb.net/paste/results/4UgvSD50.html.

It looks somewhat involved but it's more along the lines of "making
easy things easy and hard things possible". Comments and suggestions
are most welcome.

George



From cbarbez at gmail.com  Fri Nov 10 06:30:04 2006
From: cbarbez at gmail.com (DarkPearl)
Date: 10 Nov 2006 03:30:04 -0800
Subject: windows service with SNMP
In-Reply-To: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
References: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
Message-ID: <1163158204.221538.254310@h48g2000cwc.googlegroups.com>

Sorry for language, i wanted post in FR.comp.lang.python.

But...

hello with all, after having to create a Windows service with py2exe, I
have this problem when I launch the service: here what I find in the
eventLog:

The instance's SvcRun() method failed
<Error getting traceback - traceback.print_tb() failed
<class 'pywintypes.com_error'>: (-2147221020, 'Syntaxe incorrecte',
None, None)

I don't find a the problem.

If you can help me, thank's



From comp.ogz at gmail.com  Wed Nov  1 16:40:21 2006
From: comp.ogz at gmail.com (=?utf-8?q?O=C4=9Fuz_Yar=C4=B1mtepe?=)
Date: Wed, 1 Nov 2006 23:40:21 +0200
Subject: jyton usage in a python program
Message-ID: <200611012340.21801.comp.ogz@gmail.com>



Hi all. I am planning to develop an application using Python. I will need to
use Zemberek libraries that are written with Java. I know i can use Java
libraries with the help of Jython. I will write my software by Python and
will use some modules inside it. But i will need to use that Java libraries
also inside my Python program. I don't know how! I will need to import that
libraries and use some of their methods and check the return values during
the flow of the python program. How can i write jython codes inside my Python
program?

With my best wishes.

--
O?uz Yar?mtepe
http://www.yarimtepe.com


From horpner at yahoo.com  Wed Nov  1 09:29:03 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 1 Nov 2006 15:29:03 +0100
Subject: Style for modules with lots of constants
Message-ID: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>

The Glk API (which I'm implementing in native Python code)
defines 120 or so constants that users must use. The constants
already have fairly long names, e.g., gestalt_Version,
evtype_Timer, keycode_PageDown.

Calls to Glk functions are thus ugly and tedious.

    scriptref = glk.fileref_create_by_prompt(
            glk.fileusage_Transcript | glk.fileusage_TextMode,
            glk.filemode_WriteAppend, 0)

Please give me some good style advice for this situation. 

I know some modules are designed to be used as 'from XXX import
*'. Since the Glk API is heavily influenced by its inception in
C this might not be a huge problem. All the functions in the API
have glk_ prepended, since C has no namespaces. I think it makes
sense to stick the glk_'s back on the functions and instruct
users to 'from Glk import *', but I know it doesn't conform with
Python practice, and Python has plenty of modules that were
originally designed in C, but don't insist on polluting the
global namespace.

Would it better to use strings instead? Some Python builtins use
them as a way to avoid creating of global constants.

    scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
            'WriteAppend', 0)

Parsing the combinable bitfield contants might be slowish,
though.

Thanks for taking the time to consider my question.

-- 
Neil Cerutti
For those of you who have children and don't know it, we have a
nursery downstairs. --Church Bulletin Blooper


From no-spam at no-spam-no-spam.invalid  Fri Nov  3 08:50:24 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 14:50:24 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162553923.574732.305190@i42g2000cwa.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
Message-ID: <eifhf3$mmh$1@news.albasani.net>

Filip Wasilewski wrote:
> robert wrote:
>> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
>>
>> Interprocess communication is tedious and out of question, so I thought about simply using a more Python interpreter instances (Py_NewInterpreter) with extra GIL in the same process.
>> I expect to be able to directly push around Python Object-Trees between the 2 (or more) interpreters by doing some careful locking.
> 
> I don't want to discourage you but what about reference counting/memory
> management for shared objects? Doesn't seem fun for me.

in combination with some simple locking (anyway necessary) I don't see a problem in ref-counting.

If at least any interpreter branch has a pointer to the (root) object in question the ref-count is >0. 


---- 
Question Besides:  do concurrent INC/DEC machine OP-commands execute atomically on Multi-Cores as they do in Single-Core threads?

Example:

obj=Obj()

In a read-only phase (e.g. after computations) without locking, 2 Interpreters would for example both access the obj (and change around the refcount but no data).
The CPU will execute 2 [INC/DEC @refcount] OP-codes on different cores concurrently. Is it guaranteed that the counts sum up correctly?


> Take a look at IPython1 and it's parallel computing capabilities [1,
> 2]. It is designed to run on multiple systems or a single system with
> multiple CPU/multi-core. It's worker interpreters (engines) are loosely
> coupled and can utilize several MPI modules, so there is no low-level
> messing with GIL. Although it is work in progress it already looks
> quite awesome.
> 
> [1] http://ipython.scipy.org/moin/Parallel_Computing
> [2] http://ipython.scipy.org/moin/Parallel_Computing/Tutorial
 

there are some MPI methods around. (This IPython method seems to be only on the level of an artefact of the interactive terminal connections.)

Yet with its burden of expensive data sync thats far away from my requirements. Thats for massive parallel computing and in sci areas.

I do selected things with interprocess shared memory techniques already. Thats medium efficent. 

Multiple interpreters inside one process seem to be most promising for seemless multi-core programming. As all Python objects share the same malloc space - thats the key requirement in order to get the main effect. 
As soon as with have object pickling in between its well away from this very discussion.


robert


From stefan.behnel-n05pAM at web.de  Wed Nov 22 08:20:26 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Nov 2006 14:20:26 +0100
Subject: XML Validation in Python using XSV
In-Reply-To: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
Message-ID: <45644E9A.3030209@web.de>

bmichel at gmail.com wrote:
> I'd like to use XSV for validating an XML file in Python.
> I am working on Linux Debian platform.
> I'm not sure how to install XSV and how to configure it. My goal is to
> be able to import the XSV library in Python and be able to use it's
> functions.

You can use "dpkg" to install the .deb. Read "man dpkg".

BTW: any reason you need to use XSV? There are some other libraries out there
that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
much more powerful than XSV.

Stefan


From webmaster at cacradicalgrace.org  Mon Nov 27 14:41:29 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Mon, 27 Nov 2006 12:41:29 -0700
Subject: case insensitive dictionary
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
Message-ID: <ekff9e$36l$1@aioe.server.aioe.org>

John Henry wrote:
>    print pets.keys()
> 
> should print:
> 
> "Cat", "Dog"

If you do:

Py> pets['Cat'] = 2
Py> pets['Dog'] = 3
Py> pets['DOG'] = 4
Py> pets['cat'] += 5
Py> pets.keys()

What should the result be?

"['Cat', 'Dog']" or "['cat', 'DOG']"?


That is to say, if you use a new case in redefining the values of your
case insensitive dictionary, does the key take on the new case, or will
it always and forever be the case originally given to it?

Cheers,
Cliff


From anthra.norell at vtxmail.ch  Wed Nov  1 12:48:44 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 01 Nov 2006 18:48:44 +0100
Subject: Where do nested functions live?
In-Reply-To: <Xns986E6E3BBB3B2rtwfreenetREMOVEcouk@216.196.109.145>
References: <Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>	<mailman.1556.1162316571.11739.python-list@python.org>
	<Xns986E6E3BBB3B2rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <4548DDFC.9020409@vtxmail.ch>

Rob Williscroft wrote:
> Frederic Rentsch wrote in news:mailman.1556.1162316571.11739.python-
> list at python.org in comp.lang.python:
>
>   
>> Rob Williscroft wrote:
>>     
>>> Frederic Rentsch wrote in news:mailman.1536.1162292996.11739.python-
>>>       
>>>> Rob Williscroft wrote:
>>>>         
>>>>> Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
>>>>>           
>
> [snip]
>
>   
>>>>>       
>>>>>           
>>>> Here I'm lost. What's the advantage of this? It looks more convoluted.
>>>>     
>>>>         
>>> I'll agree that having to explicitly define a namespace class first 
>>> does add some convolution. 
>>>
>>> But if you refer to having to prefix you "outer" variables with
>>> "scope." then this would be the same as claiming that the explict use
>>> of self is convoluted, which is a valid opinion, so fair enough, but
>>> I can't say that I agree. 
>>>
>>>   
>>>       
>> I didn't mean to call into question. I didn't understand the advantage 
>> of the added complexity of your second example over the first.
>>
>>     
>
> Ok, I missed your point, as for the second example it was an attempt 
> to show that further refactoring from a function with local functions
> that are sharing some state via the scope object, to a class with
> methods that share state via the instance, is a matter of editing
> a few lines.  
>
> This is useful when a function grows too large (for some value of 
> "too large"). As an added bonus you get to use the same thechniques
> with both styles of coding.
>  
> [snip]
>
> Rob.
>   

Rob,

Thanks a lot for your input. I'll have to digest that. Another question 
I had and forgot was this: Since we have a class that goes out of scope 
when the function returns, and we don't need more than one instance, why 
bother to make an instance? Why not use the class object itself?

def whatever( new_ms ):

  class scope ( object ):

  def inner():
    scope.mseconds = new_ms - s * 1000       
    m, scope.seconds = divmod (s, 60)
    h, scope.minutes = divmod (m, 60)
    d, scope.hours = divmod (h, 24)
    scope.weeks, scope.days = divmod (d, 7)     


Frederic








From casevh at comcast.net  Mon Nov  6 08:34:16 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 6 Nov 2006 05:34:16 -0800
Subject: Building C extensions
In-Reply-To: <mailman.1806.1162818237.11739.python-list@python.org>
References: <mailman.1806.1162818237.11739.python-list@python.org>
Message-ID: <1162820056.767020.261250@m73g2000cwd.googlegroups.com>


Paolo Pantaleo wrote:
> Well I'm just courious: if I want to buid a C extension, I shoul use
> the same compiler that has been used to build python (right?). Since
> python has been built using Visual C, how can I build an extension if
> I don't have Visual Studio?
>
> PAolo

Use mingw32. It should work fine for most extensions.

For example, see
http://groups.google.com/group/comp.lang.python/msg/8e2260fe4d4b7de9
and the followup messages.

casevh



From ptmcg at austin.rr._bogus_.com  Wed Nov  1 18:29:36 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 01 Nov 2006 23:29:36 GMT
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<iHD1h.25601$GR2.12249@tornado.texas.rr.com>
	<ABE1h.25602$GR2.24371@tornado.texas.rr.com>
	<mailman.1538.1162294645.11739.python-list@python.org>
	<1162410125.954506.122630@b28g2000cwb.googlegroups.com>
Message-ID: <A5a2h.1925$lx6.1032@tornado.texas.rr.com>

"Jordan" <jordan.taylor2 at gmail.com> wrote in message 
news:1162410125.954506.122630 at b28g2000cwb.googlegroups.com...
<snip>
> On
> the other hand, I thought that you were looking for something that
> doesn't use openGL and I think that Slut is built around it.
>

Yes, slut *does* use OpenGL, so if that is in fact a poison pill for this 
app, it's a no-go.  The only reason I posted my original pointer to is was 
to show that an OpenGL app doesn't require using a complicated API.

-- Paul




From cgseymour at gmail.com  Wed Nov  1 17:20:28 2006
From: cgseymour at gmail.com (Chris Seymour)
Date: 1 Nov 2006 14:20:28 -0800
Subject: ANN: SPE 0.8.3.c Python IDE editor
In-Reply-To: <1162395086.009206.45020@f16g2000cwb.googlegroups.com>
References: <1162206008.469787.270830@m73g2000cwd.googlegroups.com>
	<1162213852.270705.275740@b28g2000cwb.googlegroups.com>
	<1162234468.199971.134690@m7g2000cwm.googlegroups.com>
	<1162395086.009206.45020@f16g2000cwb.googlegroups.com>
Message-ID: <1162419627.947599.285670@f16g2000cwb.googlegroups.com>

Hi Stani,
I got it going now.  Not sure why but seems good to go now.

Thanks for a great product.

Cheers.

Chris
SPE - Stani's Python Editor wrote:
> I checked the berlios site and it seems to be working. Or do you have
> another problem?
> Stani
>
> Chris Seymour schreef:
>
> > Hi Stani,
> > Not able to reach Berlios.  The SourceForge page does not have the
> > Windows installer.  Any ideas when it will be available?
> >
> > Thanks.
> >
> > Chris
> > Bernard wrote:
> > > thanks Stani!
> > >
> > > SPE - Stani's Python Editor wrote:
> > > > This is a maintenance release (mostly bug fixing) to prove that SPE is
> > > > alive and well! In case you are using wxPython2.7 you'll need to
> > > > upgrade to this release. Submitted patches will be reviewed and
> > > > included if approved for next release. Thanks for all your patient
> > > > support and continuing donations.
> > > >
> > > > The SPE 0.8.2.a release got downloaded 110550 times on berlios and
> > > > sourceforge together. Not bad. This means SPE has not seen an update
> > > > for a while or is getting very popular. Maybe both ;-)
> > > >
> > > > Installers are available for python 2.3, 2.4 and 2.5 for Windows and as
> > > > a rpm including wxPython. Other operating systems can choose the
> > > > no-setup.zip or targ.gz archives. A .deb archive is being prepared for
> > > > Debian Linux systems such as Ubuntu.
> > > >
> > > > wxGlade is unfortunately not compatible with wxPython2.7. So if you
> > > > want to use, you'll need wxPython2.6.
> > > >
> > > > :**Fixes**:
> > > >
> > > > - output is now done with a fixed font
> > > > - uml.py is now again a stand alone demo
> > > > - upgraded and fixed wxGlade
> > > > - fixed for wxPython2.7 (and still backwards compatible with
> > > > wxPython2.6)
> > > > - updated NotebookCtrl
> > > >
> > > > :**Contributors**:
> > > >
> > > > - Andrea Gavana (NoteBookCtrl)
> > > > - Alberto Griggio (wxGlade)
> > > > - Michael Foord (python 2.3 + 2.5 releases for windows)
> > > >
> > > > :**Donations**:
> > > >
> > > > The development of SPE is driven by donations. Each of these donors
> > > > receives the pdf manual in thanks for their support of SPE.
> > > >
> > > > - James Carroll (60 euro)
> > > > - John DeRosa (50 euro)
> > > > - Fumph LLC (50 euro)
> > > > - Ronald Britton (40 euro)
> > > > - David Downes (40 euro)
> > > > - Jorge Carrillo (40 euro)
> > > > - Nicolas Berney (40 euro)
> > > > - Francois Schnell (30 euro)
> > > > - Olivier Cortes (30 euro)
> > > > - Ayrshire Business Consulting Limited (30 euro)
> > > > - Chris White (25 euro)
> > > > - Thomas Wengerek (20 euro)
> > > > - John Rudolph (20 euro)
> > > > - Michael O'Keefe (20 euro)
> > > > - Michael Brickenstein (20 euro)
> > > > - Richard Walkington (20 euro)
> > > > - Oliver Tomic (20 euro)
> > > > - Jose Maria Cortes Arnal (20 euro)
> > > > - Jeffrey Emminger (20 euro)
> > > > - Eric Pederson (20 $)
> > > > - Charles Bosson (15 euro)
> > > > - Angelo Caruso (15 euro)
> > > > - Chris Hengge (15 $)
> > > > - Lo&#239;c Allys (15 euro)
> > > > - Marcin Chojnowski (15 euro)
> > > > - Boris Krasnoiarov (15 euro)
> > > > - Paul Furber (15 euro)
> > > > - Gary Robson (15 euro)
> > > > - Ralf Wieseler (15 euro)
> > > > - Samuel Schulenburg (10 euro)
> > > > - Leland Hulbert II (10 euro)
> > > > - Javier De La Mata Viader (10 euro)
> > > > - Dorman Musical Instruments (10 euro)
> > > > - Jaroslaw Sliwinski (10 euro)
> > > > - Alessandro Patelli (10 euro)
> > > > - James Pretorius (10 euro)
> > > > - Richard Wayne Garganta (10 euro)
> > > > - Maurizio Bracchitta (10 euro)
> > > > - Larry Lynch (10 euro)
> > > > - Kay Fricke (10 euro)
> > > > - Henrik Binggl (10 euro)
> > > > - Jerol Harrington (10 euro)
> > > > - Victor Adan (10 euro)
> > > > - James Fuqua (10 euro)
> > > > - Christian Seberino (5 euro)
> > > > - Serge Smeesters (5 euro)
> > > > - Jarek Libert (5 euro)
> > > > - Robin Friedrich (5 euro)
> > > > - Udo Rabe (5 euro)
> > > > - Roch Leduc (4 euro)
> > > > - Rha Diseno y Desarrollo (2 euro)
> > > >
> > > > :**Installation**:
> > > >
> > > > - See http://pythonide.stani.be/manual/html/manual2.html
> > > >
> > > > :**Development**:
> > > >
> > > > - http://developer.berlios.de/mail/?group_id=4161
> > > >
> > > > About SPE:
> > > > SPE is a python IDE with auto-indentation, auto completion, call tips,
> > > > syntax coloring, uml viewer, syntax highlighting, class explorer,
> > > > source index, auto todo list, sticky notes, integrated pycrust shell,
> > > > python file browser, recent file browser, drag&drop, context help, ...
> > > > Special is its blender support with a blender 3d object browser and its
> > > > ability to run interactively inside blender. Spe integrates with XRCed
> > > > (gui
> > > > designer) and ships with wxGlade (gui designer), PyChecker (source
> > > > code doctor), Kiki (regular expression console) and WinPdb (remote,
> > > > multi-threaded debugger).
> > > >
> > > > The development of SPE is driven by its donations. Anyone who donates
> > > > can ask for an nice pdf version of the manual without ads (74 pages).



From george.sakkis at gmail.com  Sun Nov 19 23:38:58 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 19 Nov 2006 20:38:58 -0800
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
Message-ID: <1163997538.085630.102190@m73g2000cwd.googlegroups.com>

Steven D'Aprano wrote:

> > A short description to all the functions:
> >
> > icmp(iterable1, iterable2) -> integer
> > 	Return negative if iterable1 < iterable2,
> > 	zero if iterable1 == iterable1,
> > 	positive if iterable1 > iterable1.
>
>
> What does it mean for an iterable to be less than another iterable? That
> it has fewer items? How do these two iterables compare?
>
> iter([1, 2, None, "foo", 3+2j])
>
> def ones():
>     while 1:
>         yield 1
>
> Which is smaller?

Haven't checked the specific implementation, but I would expect it to
behave like sequences of the same type, i.e. first compare the first
elements of the iterables; if they are equal compare the second
elements, and so on, until the first inequality or until the shorter
one ends. In your example, the second iterable is smaller. Needless to
say, you'd better not compare an infinite iterable with itself ;-)

> > drop(n,iterable) -> iterable
> > 	drops the first n elemetns of iterable and
> > 	return a iterator over the rest
>
> Just like itertools.islice(iterable, n, None)
>
> >>> list(itertools.islice(xrange(20), 15, None))
> [15, 16, 17, 18, 19]
>
> (Aside: I think islice would be so much cleaner if it took keyword
> arguments.)

How about slice notation ? I just posted in the Cookbook an OO wrapper
of itertools that, among other functions, uses slice notation for
islice and "+" for chain. Admittedly, my proposal in the py-3k list to
make iter() return itertools-enabled iterators was overwhelmingly shot
down, but I still like it anyway. FWIW, here's the Cookbook link:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498272

George



From p.lavarre at ieee.org  Fri Nov 10 00:35:47 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 21:35:47 -0800
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163136947.735028.95160@m73g2000cwd.googlegroups.com>

Jython exists.



From python.list at tim.thechases.com  Thu Nov 16 11:53:17 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 16 Nov 2006 10:53:17 -0600
Subject: Yield
In-Reply-To: <eji3e4$d39$1@south.jnrs.ja.net>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>	<mailman.227.1163664079.32031.python-list@python.org>	<455c1ddf@news.eftel.com>	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>	<eji19t$cak$1@south.jnrs.ja.net>	<1163693354.446751.38890@b28g2000cwb.googlegroups.com>
	<eji3e4$d39$1@south.jnrs.ja.net>
Message-ID: <455C977D.2070009@tim.thechases.com>

>> I absoultely agree.  Thanks for pointing me out to some real-world
>> code.  However, the function you pointed me to is not a generator
>> (there is no yield statement... it just returns the entire list of
>> primes).
> 
> Oops,  should have looked at the code more closely. Another example
> would be os.walk() in the standard library. 

I've used a similar scheme for dealing with incoming data files. 
  Sometimes, I get them Emailed/FTP'ed so they're sitting in a 
folder, so I can do a multitude of them by just pointing 
os.walk() at them.  Other times, I get them on specially 
formatted CDs.  It's nice to have the clean main-loop logic of:

	for file_name in source:
		do_stuff(file_name)

and be able to dynamically set "source" to an generator that 
either wraps os.walk() for a given directory or repeatedly (1) 
reads the file on the CD to know where it should be dumped, (2) 
copies files off the CD to their associated dumping ground, (3) 
ejects the CD, (4) yields the name of the file to process in the 
dumping-ground directory, and (5) prompts the user if there are 
more CDs to be processed.

Without "yield" functionality, I'd either have to have two 
duplicate loops with similar internal logic (the do_stuff() sort 
of code), or I'd have to read in all the files off the CD and 
*then* process them all as a list afterwards.

Just one of the places I've recently been thankful for generators.

-tkc







From fredrik at pythonware.com  Wed Nov  1 15:34:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 21:34:52 +0100
Subject: scared about refrences...
In-Reply-To: <1162412436.595926.66940@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
Message-ID: <eib0dc$8gg$1@sea.gmane.org>

SpreadTooThin wrote:

>> Plain wrong. There's no "primitives" (ie : primitive data types) in
>> Python, only objects. And they all get passed the same way.
> 
> so..
> def fn(x):
>    x = x + 1
>    print x
> 
> a = 2
> fn(a)
> fn(2)
> 
> Wouldn't you say that this is being passed by value rather than by
> refrence?

Python uses neither "call by value" nor "call by reference", but that's 
irrelevant: the result you're seeing has nothing to do with the calling 
model, but with how assignment works.  Gabriel already posted this link; 
I suggest you read it again:

     http://www.effbot.org/zone/python-objects.htm

</F>



From pavlovevidence at gmail.com  Wed Nov 15 19:28:20 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 15 Nov 2006 16:28:20 -0800
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
	<1163605597.576368.243640@f16g2000cwb.googlegroups.com>
Message-ID: <1163636900.165072.55310@k70g2000cwa.googlegroups.com>

walterbyrd wrote:
> Trying to be as fair as I can be, my research shows that demand for
> developers where PHP is the primary is *far* higher than jobs where
> Python is the primary skills.

Probably because PHP is so bug-prone and man-inefficient that a small
website occupies a programmer's whole time, whereas a single Python (or
Ruby, or Perl, or even Java) programmer could manage several web sites.

(If by "probable" I mean "wishful thinking", that is :)


Carl Banks



From paddy3118 at netscape.net  Sun Nov 19 23:51:29 2006
From: paddy3118 at netscape.net (Paddy)
Date: 19 Nov 2006 20:51:29 -0800
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<4560dc49$0$10440$426a74cc@news.free.fr>
Message-ID: <1163998289.608597.115010@h48g2000cwc.googlegroups.com>


Bruno Desthuilliers wrote:
> And this would be still more informative (and not deprecated...):
>
> filename = '/tmp/foo'
> f = open(fliename)
>
> Catching an exception just to raise a less informative one is somewhat
> useless IMHO.

Except that in the 'artificial' environment of homework, you are marked
for what you *show* you know, Catching an exception shows that the
pupil considered that opening a file could throw an exception.
You would have to comment  that a try except block was considered, give
an example of correct usage, then why it was not used, to get
equivalent, (or slightly higher), marks.
 
(That was drilled into me so many times at school).

- Paddy.



From johnjsal at NOSPAMgmail.com  Tue Nov 14 16:52:43 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Nov 2006 16:52:43 -0500
Subject: refactoring so that multiple changes can be made with one
	variable?
In-Reply-To: <1163522075.704650.40850@i42g2000cwa.googlegroups.com>
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
	<1163522075.704650.40850@i42g2000cwa.googlegroups.com>
Message-ID: <455a3a7f$0$32421$c3e8da3@news.astraweb.com>

Paddy wrote:

> You could keep a handle on all object instances created then go through
> the objects making appropriate changes, e.g:
> 
> 
> class Character(object):
>      instances = []
>      def __init__(self, name, strength, dexterity, intelligence):
>           instances.append(self)
>           # as before ...
>      def mod_instances(self):
>           for inst in instances:
>                inst.some_property += 1     # or whatever
> # (Untested)

But doesn't this require that the change be predetermined so you can 
code it into the method?

I don't necessarily need a programmatic way to do this, just a simple 
way to go back to the code and edit a single thing, instead of having to 
update all the numbers.


From george.sakkis at gmail.com  Fri Nov 10 01:14:50 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 9 Nov 2006 22:14:50 -0800
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163139290.594834.240860@h48g2000cwc.googlegroups.com>

how are BMWs not the same with Yugos ?

both have four wheels and burn gasoline.................



From grahamd at dscpl.com.au  Tue Nov  7 18:38:51 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 7 Nov 2006 15:38:51 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<mailman.1858.1162935489.11739.python-list@python.org>
Message-ID: <1162942731.611376.128350@i42g2000cwa.googlegroups.com>


Shane Hathaway wrote:
> robert wrote:
> > I'd like to use multiple CPU cores for selected time consuming Python
> > computations (incl. numpy/scipy) in a frictionless manner.
> >
> > Interprocess communication is tedious and out of question, so I
> > thought about simply using a more Python interpreter instances
> > (Py_NewInterpreter) with extra GIL in the same process. I expect to
> > be able to directly push around Python Object-Trees between the 2 (or
> > more) interpreters by doing some careful locking.
> >
> > Any hope to come through? If possible, what are the main dangers? Is
> > there an example / guideline around for that task? - using ctypes or
> > so.
> >
> > Or is there even a ready made Python module which makes it easy to
> > setup and deal with extra Interpreter instances? If not, would it be
> > an idea to create such thing in the Python std libs to make Python
> > multi-processor-ready. I guess Python will always have a GIL -
> > otherwise it would loose lots of comfort in threaded programming
>
> I'd like to mention mod_python, which creates multiple interpreters
> inside Apache.  It does this transparently and works well.  There is no
> apparent lock contention between the interpreters, because no Python
> objects are shared.

In relation to mod_python, your statement isn't strictly true. One can
create scenarios in mod_python where a Python object created in the
context of one interpreter is then used in another interpreter at a
later point. Generally this isn't an issue because it is part of a
recursive sequence of processing and thus while the second interpreter
is doing stuff with the object the first is stalled waiting for the
second to return. It wouldn't be totally inconceivable though for a
user to create threads which may operate on the object at the same time
in the first interpreter as the object is being used in the second
interpreter.

The situation gets even more complicated when you start to use third
party modules which may be used from multiple interpreters and a
multithreaded Apache MPM is used and where the third party module
performs callbacks into interpreters with some common object.

Thus, mod_python may not be able to benefit from each Python
interpreter instance having its own GIL if that was your point in
referencing mod_python.

Graham



From rtw at freenet.co.uk  Wed Nov  1 15:52:40 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 14:52:40 -0600
Subject: Style for modules with lots of constants
References: <Xns986EC9B236E30rtwfreenetREMOVEcouk@216.196.109.145>
	<mailman.1617.1162412498.11739.python-list@python.org>
Message-ID: <Xns986ED47D34763rtwfreenetREMOVEcouk@216.196.109.145>

Tim Chase wrote in news:mailman.1617.1162412498.11739.python-
list at python.org in comp.lang.python:

>>> The reason I used instances instead of just the Constants
>>> class was so that I could define a little more descriptive
>>> context for the constants,
>> 
>> Sorry I don't know what you mean here, could I have an example
> 
> 
> It helps in the recognition if you have separation between 
> something like
> 
>      turnDirection.LEFT

class turnDirection( object ) : pass
turnDirection.LEFT = 0
turnDirection.RIGHT = 1

> 
> and
> 
>      alignment.LEFT

class alignment( object ) : pass
alignment.LEFT = 3

> 
> They may be the same or different value for LEFT, but by grouping 
> them in a "descriptive context", it's easy to catch mistakes such as
> 
>      paragraph.align(turnDirection.LEFT)
> 
> when what you want is
> 
>      paragraph.align(alignment.LEFT)
> 
> and, as an added bonus, prevents name clashes such as
> 
>      turnDirection.LEFT = 2
>      alignment.LEFT = 0
>
> With the grab-bag o' constants, you have to use old-school 
> C-style in your modern name-space'd Python:
> 
>      gboc.TURN_LEFT = 2
>      gboc.ALIGN_LEFT = 0
> 
> or even worse, you'd end up with cruftage where you have
> 
>      gboc.LEFT = 2
>      gboc.ALIGN_LEFT = 0 #created a month later as needed
> 
> and then accidentally call
> 
>      paragraph.align(gboc.LEFT)
> 
> when you mean
> 
>      paragraph.align(gboc.ALIGN_LEFT)
> 
> This is what I understand the grandparent's post to be referring 
> to by "descriptive context".

Fair enough, but there is nothing in this that can't be done with
pure (instance free) classes as shown above, with the advantage
that the client just imports the name for the set of constants 
they want to use, and uses them with no need to construct.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From steve at holdenweb.com  Wed Nov  8 11:53:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 10:53:08 -0600
Subject: Python Error:IndentationError: expected an indented block
In-Reply-To: <20061108154702.61516.qmail@web58107.mail.re3.yahoo.com>
References: <20061108154702.61516.qmail@web58107.mail.re3.yahoo.com>
Message-ID: <eit1va$p7b$2@sea.gmane.org>

Antonios Katsikadamos wrote:
> hi all. I try to run an old python code and i get the following message
> 
> File "/home/antonis/db/access.py", line 119
>     def DoCsubnet1 (action, subject, target, args):             # DoC 
> servers net
>       ^
> IndentationError: expected an indented block
> 
> 1) and I don't know what causes it. I would be grate full if you could 
> give me a tip.
> 
Typically you have a line ending in a colon (like an "if" or "for" 
statement) where the next line isn't at a higher indented level.

This is an indication that the code NEVER worked.

> 2) how can i overcome it? Can i use the keyword pass?and if how ccan i 
> use it
> 
You could just blindly add an indented pass statement, but there is of 
course no guarantee this will be what you require.

How long is the code? Would it be practical to publish it here? (If it's 
more than 200 lines assume the answer to that last question is "no").

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From e0427417 at student.tuwien.ac.at  Mon Nov 20 22:10:38 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Tue, 21 Nov 2006 04:10:38 +0100
Subject: Help!!!  New to Python and getting an error I can't figure out
In-Reply-To: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <45626dcc$0$8024$3b214f66@tunews.univie.ac.at>

Tom Mountney wrote:
> Any help is greatly appreciated!!!
> 
> I'm learning python and from a book I tried this program: (all the
> indentation is there just doen't appear in this EMail)
> ----------------------------------------------------------
> 
> #file grep.py
> import os
> from os import isfile
> 
> class dirGrep:
>  def __init__(self, directory):
>   self.files = filter(isfile,
>    [os.path.join(directory, x) for x in os.listdir(directory)])
> 
>  def findLines(self, pattern, filelist=none):
>   """Accepts pattern, returns lines that contain pattern.
>   Optional 2nd argument is a filelist to search"""
>   if not filelist:
>    filelist = self.files
>   results = []
>   for file in filelist:
>    fo = open(file)
>    results += [x for x in fo.readlines()
>     if x.find(pattern) != -1]
>    fo.close() #explicit close of the file object
>   return results
> 
>  def findfiles(self, pattern):
>   "Accepts pattern, returns filenames that contain pattern"
>   return[x for x in self.files if x.find(pattern) != -1

Missing ']' !!!!
[ ... ] can span over multiple lines, so python reads until it gets this "wrong" if statement. ;)

> 
> #test
> if __name__ == "__main__":
>  (g = dirGrep("c:\\winnt"))
>  files = g.findFiles(".py")
>  print g.findLines("java", files)
> 
> When I try to run the program - python grep.py - I get the following error:
> 
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax
> 
> What am I doing wrong?
> Thanks for any help
> 
> 


From deets at nospam.web.de  Wed Nov 22 11:43:19 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 22 Nov 2006 17:43:19 +0100
Subject: PyQt app in seperate thread
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
	<1164206635.601219.36860@j44g2000cwa.googlegroups.com>
Message-ID: <4sjd17FvqtpmU1@mid.uni-berlin.de>

> OK I see that now. Thanks for pointing that out. So basically, I can't
> do what I want at all. That's a bit of a pain. Is there no way of
> tricking Qt into thinking I'm running it in the main thread?

Maybe you can either invert the thread-roles - that is, run your "main"
application in a thread, and if needed start the Qt-thing, or you might
consider spawning a process and using pyro. Which will work very neat, done
so myself.

Diez


From noone at nowhere.com  Wed Nov 15 09:23:14 2006
From: noone at nowhere.com (Josh)
Date: Wed, 15 Nov 2006 09:23:14 -0500
Subject: sqlite3 views, if not exists clause
References: <mailman.140.1163512445.32031.python-list@python.org>
Message-ID: <455b22d2$0$561$b45e6eb0@senator-bedfellow.mit.edu>

"Tim Golden" <Tim.Golden at viacom-outdoor.co.uk> wrote in message 
news:mailman.140.1163512445.32031.python-list at python.org...

| Not a bug with the "sqlite3 api that comes with python 2.5." as such,
| since .execute pretty much passes its parameters through to the database
| engine. Rather, the syntax you're using is a relatively late addition
| to the sqlite libs -- at least it fails on my 3.2.1 version of the
| sqlite3 commmand-line tool, but succeeds on the latest download (3.3.8).
|
| I presume therefore that you build of Python is linked against an
| older version of the sqlite libraries / DLL.

Exactly right. Since the sqlite3 interface hasn't changed, the fix was 
simply to copy the newest sqlite3.dll into the python dll directory. Now I 
no longer have to catch and ignore the "already exists" exception thrown by 
python. Thanks! 




From grflanagan at yahoo.co.uk  Sat Nov  4 06:09:45 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 4 Nov 2006 03:09:45 -0800
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <CAY2h.21661$TV3.1374@newssvr21.news.prodigy.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
	<k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>
	<1162626260.236167.157920@m73g2000cwd.googlegroups.com>
	<CAY2h.21661$TV3.1374@newssvr21.news.prodigy.com>
Message-ID: <1162638585.016404.20270@m7g2000cwm.googlegroups.com>

James Stroud wrote:
> Gerard Flanagan wrote:
> >> py> # the following is probably the trickiest, should it return a Table
> >> py> # should it be illegal?
> >> py> # should t['Last'] be the way to take the "slice" and get the col?
> >> py> t[None, 'Last']     # 1d slice returns list (2nd dim. explicit)
> >> ['Barker', 'Burnet', 'Danson', 'Cooper']
> >
> > I can imagine manipulating columns at the Table creation stage -
> > insert, append, delete column - but after that I think you would be
> > dealing with rows more often. Personally, if I needed columns I would
> > be happier with a list comprehension:
> > [ (row['Last'], row['Age']) for row in t ]
> >      etc.
>
> To make a table from list comprehension in this way seems like it would
> require some redundancy because a list comprehension only gets you a
> list (of rows or lists). It seems if you wanted to work with your 2d
> selection of data, then you would want to get a table back:
>
> data = [ (row['Last'], row['Age']) for row in t ]
> t2 = Table(('Last','Age'), data)
>
> This seems, to me, to separates selection in the 2 dimensions and makes
> it "backwards":
>
> data = [ (row['Last'], row['Age']) for row in t[1:3]]
> t2 = Table(('Last','Age'), data)
>
> So a function would be needed to group the selection in a way that
> reflects the organization of the table:
>
> t2 = t.subtable((1,3), ('Last','Age'))
>
> But then, since the latter seems a natural consequence of using list
> comprehension for selection, how might one distinguish a range of
> columns if not by a verbose function name?
>
> t2 = t.subtable_with_column_range((1,3), ('Last','Age'))
>
> The concept of slicing seems to take care of this. Maybe
>
> t2 = t.subtable(slice(1,3), slice('Last','Age'))
>
> But this begins to seem awkward and verbose to boot. Any suggestions on
> adapting your idea of list comprehension to generate subtables?
>

What about symmetric 'load' and 'iterrows' methods for the Table class:

    t2 = Table()
    t2.load( t1.iterrows("LastName", "Age") )

def load(self, iterable):
    '''expecting tuples'''
    for lname, age in iterable:
        self.append( lname, age )

def iterrows(self, *args):
    '''returns a generator which itself returns tuples
      filtered by the column names in *args (via
      operator.itemgetter maybe?)'''


There might be some value in comparing Microsoft's DataSet API.  IIRC,
you typically have:

*UI* - DataView - DataSet - DataAdapter - *DATABASE*

A DataSet is a collection of DataTables and has a lot of DB/XML
functionality and so on.  A DataView on the other hand is more
lightweight and has mainly filtering and sorting functions and is
designed to be bound to a GUI widget such as a DataGrid.

You might have something along the lines of:

   ds = DataSet()
   # fill ds from datasource
   dt_customers = ds.tables["customers"]
   view = DataView( dt_customers )
   view.rowfilter = "lastname LIKE 'A*' and Age < 60"

I'm not saying imitate this, but maybe some value in studying the
OO-bondage approach.

All the best

Gerard



From fredrik at pythonware.com  Tue Nov 14 06:23:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:23:33 +0100
Subject: __init__.py
In-Reply-To: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com>
References: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com>
Message-ID: <ejc8vi$sip$1@sea.gmane.org>

km wrote:

> what is the use of __init__.py file in a module dir ?

it tells Python that the directory is a package directory.  if you have

     mydir/foo/__init__.py
     mydir/foo/module.py

and mydir is on the path, you can do "import foo.module" or "from foo 
import module".  if you remove the __init__.py file, Python will no 
longer look for submodules inside that directory.

> Is it used to initialize variables  that could be shared across sub 
> modules  if set in __init__.py at root dir  of module ?

it's usually empty, or used to export selected portions of the package 
under more convenient names.  given the example above, the contents of 
the __init__ module can be accessed via:

     import foo

</F>



From fredrik at pythonware.com  Sat Nov 18 05:09:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 11:09:07 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <1163835505.102190.140060@b28g2000cwb.googlegroups.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>
	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>
Message-ID: <ejmm4d$guk$1@sea.gmane.org>

Uche Ogbuji wrote:

> I certainly have never liked the aspects of the ElementTree API under
> present discussion.  But that's not as important as the fact that I
> think the above statement is misleading.  There has always been a
> battle in XML between the people who think the serialization is
> preeminent, and those who believe some data model is preeminent, but
> the reality is that XML 1.0 (an 1.1) is a spec *defined* by its
> serialization.

sure, the computing world is and has always been full of people who want 
the simplest thing to look a lot harder than it actually is.  after all, 
*they* spent lots of time reading all the specifications, they've bought 
all the books, and went to all the seminars, so it's simply not fair 
when others are cheating.

in reality, *all* interchange formats are easier to understand and use 
if you focus on a (complete or intentionally simplified) data model of 
the things being interchanged, and treat various artifacts of the 
byte-stream used by the wire format as artifacts, historical accidents 
based on what specification happened to be written before the other, or 
what some guy did or did not do in the seventies, as accidents, and 
esoteric arcana disseminated on limited-distribution mailing lists as 
about as relevant for your customer as last week's episode of American Idol.

(XML is a bit unusual in this respect, but that's probably just some 
variation of the bikeshed effect.  it's just text, and everyone with
a keyboard knows what that is, so we don't need to use established 
software engineering practices, or think about security *at all* 
(Billion laughs? XXE?) or, for that matter, learn from people who's
been doing data interchange in other domains since the dawn of time. 
and when they do appear anyway, and mess with our technology in ways 
that we haven't authorized, without reading our books or going to our 
seminars or subscribing to our mailing lists, we can write them off as 
"clueless muppet teenage genius code-jockeys", and keep patting our- 
selves on the back, while the rest of the world is busy routing around 
us, switching to well-understood XML subsets or other serialization 
formats, simpler and more flexible data models, simpler API:s, and
more robust code.  and Python ;-)

</F>



From bignose+hates-spam at benfinney.id.au  Mon Nov 13 00:56:14 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 13 Nov 2006 16:56:14 +1100
Subject: how do i map this?
References: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
	<mailman.34.1163391109.32031.python-list@python.org>
	<1163393708.532194.250580@k70g2000cwa.googlegroups.com>
Message-ID: <87veljhou9.fsf@benfinney.id.au>

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

> Ben Finney wrote:
> > You're printing a string, and never using that 'row' parameter.
>
> If that is so, why is he getting that message "TypeError: format
> requires a mapping"?

No idea. Probably because what the poster showed us is not code that
shows the problem described.

Original poster (and everyone who wants help with their program
behaving unexpectedly): please ensure that you post a complete,
minimal example of code that exhibits the unexpected behaviour.

-- 
 \             "Room service? Send up a larger room."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From fuzzyman at gmail.com  Fri Nov  3 16:19:34 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Nov 2006 13:19:34 -0800
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
Message-ID: <1162588774.874189.240330@m73g2000cwd.googlegroups.com>


Omar wrote:
> I'm looking for a programming language or module that sorta looks and
> feels like MS Excel (I love and think in tables), yet has the power and
> open-endedness of python or javascript.  I'm still pretty new to
> python.
>
> any ideas?  i've been having some fun with VBA in excel, but I want
> something I can save as en exe and call my own creation, y'know?

I think you'll have to build it. For .NET there are lots of third party
grids available and a native one as well. You may want to look at the
grid supplied with wxPython.

Spreadsheets are effectively interfaces to functional programming, so
this request isn't as odd as it may seem to some.

You probably want to have a look at the PyCells project which can
handle the dependency tracking you will need: which is harder than you
might think.

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



From fredrik at pythonware.com  Sat Nov  4 11:49:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 04 Nov 2006 17:49:52 +0100
Subject: python GUIs comparison (want)
In-Reply-To: <1162657420.655675.185930@e3g2000cwe.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
Message-ID: <eiigbg$ft4$1@sea.gmane.org>

Mudcat wrote:

> I have been using Tkinter for several years now. Recently I have been
> thinking about switching to something else that may have a sharper
> appearance. However I'm not sure what that may be, and if that
> something else is *that* much better than what I'm already using.

Tk 8.5 isn't that far away, though.

http://www.markroseman.com/tcl/guide85.html

</F>



From rridge at csclub.uwaterloo.ca  Tue Nov  7 10:38:02 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 7 Nov 2006 07:38:02 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
Message-ID: <1162913881.953664.254960@m73g2000cwd.googlegroups.com>

Joe Seigh wrote:
> Basically there's a race condition where an object containing the
> refcount can be deleted between the time you load a pointer to
> the object and the time you increment what used to be a refcount
> and is possibly something else but definitely undefined.

That doesn't really make sense.  The object can't be deleted because
the thread should already have a reference (directly or indirectly) to
the object, otherwise any access to it can cause the race condition you
describe.

                                  Ross Ridge



From miles.chris at gmail.com  Tue Nov 14 10:39:39 2006
From: miles.chris at gmail.com (Chris Miles)
Date: Tue, 14 Nov 2006 15:39:39 +0000
Subject: Python speed on Solaris 10
Message-ID: <ejcnvs$n56$1@sea.gmane.org>

I have found that the sunfreeware.com build of Python 2.4.3 for Solaris 
10 is faster than one I can build myself, on the same system. 
sunfreeware.com doesn't bother showing the options they used to 
configure and build the software, so does anyone know what the optimal 
build options are for Solaris 10 (x86)?

Here are some pybench/pystone results, and I include the same comparison 
of Python2.4.3 running on CentOS 4.3 on the same hardware (which is what 
prompted me to find a faster Python build in the first place).

Python 2.4.3:
   System               pybench      Pystone (pystones/s)
--------------------------------------------------------
   Sol10 my build       3836.00 ms   37313.4
   Sol10 sunfreeware    3235.00 ms   43859.6
   CentOS               3569.00 ms   44247.8


My build:
Python 2.4.3 (#1, Oct 15 2006, 16:00:33)
[GCC 3.4.3 (csl-sol210-3_4-branch+sol_rpath)] on sunos5

sunfreeware.com build:
Python 2.4.3 (#1, Jul 31 2006, 05:14:51)
[GCC 3.4.6] on sunos5

My build on CentOS 4.3:
Python 2.4.3 (#1, Jul 19 2006, 17:52:43)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2


is the difference purely gcc minor version?


-- 
http://chrismiles.info/



From jm.suresh at gmail.com  Sun Nov  5 07:54:42 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 5 Nov 2006 04:54:42 -0800
Subject: finding the list of the matched strings
Message-ID: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>

Hi, I have a list of strings. And I want to find the subset which
matches a particular regular expression.

import re
ll = ('a', 'b', 's1', 's2', '3s')
p = re.compile('^s.*')
newList = filter(lambda s: p.match(s), ll)

I suppose there should be simple function to do this in re module. Is
there any?

I searched google, but could not find one, may be for keywords were not
perfect.

Thanks.
Suresh



From gagsl-py at yahoo.com.ar  Thu Nov  9 19:20:12 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 21:20:12 -0300
Subject: Tkinter check box behaviour - Windows / Linux discrepancy
In-Reply-To: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
References: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109210226.05766278@yahoo.com.ar>

At Thursday 9/11/2006 20:28, peter wrote:

>I've come across a weird difference between the behaviour of the
>Tkinter checkbox in Windows and Linux.  The issue became apparent in
>some code I wrote to display an image in a fixed size canvas widget. If
>a checkbox was set then the image should be shrunk as necessary to fit
>the canvas while if cleared it should appear full size with scrollbars
>if necessary.
>
>The code worked fine under Linux (where it was developed).  But under
>Windows, the first click in the checkbox did nothing, then subsequent
>clicks adjusted the size according to the PREVIOUS, not the current,
>checkbox state.
>
>I've isolated the problem in the code below, which shows a single
>checkbox and a label to describe its state. It works ok under Linux,
>but in Windows it is always one click behind.


>         self.chkTest=tk.Checkbutton(frmMain,text='Click
>me!',variable=self.intTest)
>
>         self.chkTest.bind('<ButtonRelease-1>',self.chkTest_click)

Your code works fine in Linux just by accident. The action of button 
widgets must be associated to "command"; as you see, when the mouse 
button is released, the associated variable might not have been updated.
Remove that bind call, and use:

         self.chkTest=tk.Checkbutton(frmMain,text='Click 
me!',variable=self.intTest, command=chkTest_click)

(Should work fine on every platform - I've just tested on Windows)
The command is fired after the mouse up event, and *only* if the 
previous mouse down was over the same widget. Your code doesn't work 
either if the user presses SPACE to toggle the button state; using 
"command" works fine in this case too.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From Laundro at gmail.com  Fri Nov 24 02:55:48 2006
From: Laundro at gmail.com (LaundroMat)
Date: 23 Nov 2006 23:55:48 -0800
Subject: reading id3 tags with python
In-Reply-To: <o9s9h.2927$tM1.1672@newsread1.news.pas.earthlink.net>
References: <1164328566.089711.89870@l12g2000cwl.googlegroups.com>
	<o9s9h.2927$tM1.1672@newsread1.news.pas.earthlink.net>
Message-ID: <1164354948.000349.52170@m7g2000cwm.googlegroups.com>

Heh, a description of the error would be nice indeed.

Just a preliminary warning: with this code you will also be parsing
directories. id3reader can't handle those ofcourse.

Better add a check such as eg:
if os.path.isfile(os.path.join(directory, file)):
        # do your thing

laundro



From cliff at develix.com  Tue Nov  7 19:41:20 2006
From: cliff at develix.com (Cliff Wells)
Date: Tue, 07 Nov 2006 16:41:20 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162856841.319591.73530@f16g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
	<1162854476.903789.5550@b28g2000cwb.googlegroups.com>
	<eiogps$c1d$1@sea.gmane.org>
	<mailman.1825.1162856290.11739.python-list@python.org>
	<1162856841.319591.73530@f16g2000cwb.googlegroups.com>
Message-ID: <1162946480.3592.6.camel@localhost.localdomain>

On Mon, 2006-11-06 at 15:47 -0800, John Machin wrote:
> Gabriel Genellina wrote:
> > At Monday 6/11/2006 20:34, Robert Kern wrote:
> >
> > >John Machin wrote:
> > > > Indeed yourself. Have you ever considered reading posts in
> > > > chronological order, or reading all posts in a thread?
> > >
> > >That presumes that messages arrive in chronological order and
> > >transmissions are
> > >instantaneous. Neither are true.
> >
> > Sometimes I even got the replies *before* the original post comes.
> 
> What is in question is the likelihood that message B can appear before
> message A, when both emanate from the same source, and B was sent about
> 7 minutes after A.

Usenet, email, usenet/email gateways, internet in general...  all in
all, pretty likely.  I've often seen replies to my posts long before my
own post shows up.  In fact, I've seen posts not show up for several
hours.   

Regards,
Cliff





From cousinstanley at hotmail.com  Fri Nov 24 19:47:53 2006
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Fri, 24 Nov 2006 18:47:53 -0600
Subject: SQLite3__Python2.3-SQLite__Problem
References: <1164325325_8617@sp6iad.superfeed.net>
	<1164401238.582515.226860@45g2000cws.googlegroups.com>
Message-ID: <1164415673_14127@sp6iad.superfeed.net>

>>   ....
>>   I thought I remembered that the data bases created either way
>>   were always 100% transparent with each other and that I could
>>   use an SQLite3 data base either from the command line or from
>>   within Python without any problems at all ....
>
> My guess is that 2 years ago you were using sqlite 2, not 3.

  I think that is probably a  very  good guess ....


>>  I did a fair amount of Google-izing looking for related problems
>>  but didn't have much success ....

> In that case your googler is absolutely rooted and should be 
> replaced immediately.

> With mine, google("file is encrypted or is not a database") 
> produces as first hit (would you believe!?)

  My Googl-er is probably OK, but the Google-ee ( e.g. me )
  is  always  in need of a tune-up .... :-)

> Q: SQLite::Exceptions::\DatabaseException file is encrypted 
> or is not a database.
>
> A: It seems that sqlite databases created with version 2
> do not work with sqlite version 3 and vice versa

  I did re-build the data bases from the command line
  using sqlite3 instead of using the older ones
  from a couple of years back which I wasn't sure
  were sqlite2 or sqlite3 ....

  It seems that the older Debian Sarge version
  of the python2.3-sqlite package is the one
  that isn't directly compatible with sqlite3 dbs
  created at the command line .... 

  I downloaded the PySQLite2 source package
  and compiled and installed it using distutils .... 

  Now everything is also working fine under Debian Sarge
  and the dbs are OK either from the command line or from
  within Python .... 

  Thanks a lot for taking the time to help ....


-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From nnorwitz at gmail.com  Sat Nov 18 05:20:46 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 18 Nov 2006 02:20:46 -0800
Subject: How can I speed this function up?
In-Reply-To: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <1163845246.702167.16380@h48g2000cwc.googlegroups.com>

Chris wrote:
> This is just some dummy code to mimic what's being done in the real
> code. The actual code is python which is used as a scripting language in
> a third party app. The data structure returned by the app is more or
> less like the "data" list in the code below. The test for "ELEMENT" is
> necessary ... it just evaluates to true every time in this test code. In
> the real app perhaps 90% of tests will also be true.

As others have said, without info about what's happening in C, there's
no way to know what's equivalent or fast enough.

> So my question is how can I speed up what's happening inside the
> function write_data()? Only allowed to use vanilla python (no psycho or
> other libraries outside of a vanilla python install).

Generally, don't create objects, don't perform repeated operations.  In
this case, batch up I/O.

> def write_data1(out, data):
>      for i in data:
>          if i[0] is 'ELEMENT':
>              out.write("%s %06d " % (i[0], i[1]))
>              for j in i[2]:
>                  out.write("%d " % (j))
>              out.write("\n")

def write_data1(out, data, map=map, str=str):
     SPACE_JOIN = ' '.join
     lines = [("ELEMENT %06d " % i1) + SPACE_JOIN(map(str, i2))
              for i0, i1, i2 in data if i0 == 'ELEMENT']
     out.write('\n'.join(lines))

While perhaps a bit obfuscated, it's a bit faster than the original.
Part of what makes this hard to read is the crappy variable names.  I
didn't know what to call them.  This version assumes that data will
always be a sequence of 3-element items.

The original version took about 11.5 seconds, the version above takes
just over 5 seconds.

YMMV,
n



From dlenski at gmail.com  Thu Nov  9 14:06:06 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 11:06:06 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <45536639$0$23587$426a34cc@news.free.fr>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<45536639$0$23587$426a34cc@news.free.fr>
Message-ID: <1163099166.793869.271900@h48g2000cwc.googlegroups.com>

Christophe wrote:
> Dan Lenski a ?crit :
> > Nick and John S., thank you for the tip on wxPython!  I'll look into it
> > for my next project.  I too would avoid Qt, not because of the GPL but
> > simply because I don't use KDE under Linux and because Qt is not well
> > supported under Cygwin or on native Windows.
> Qt is very well supported under Windows! Avoid spreading lies please ;)
>

My apologies!  I'm glad to be corrected on this.  There are Cygwin
packages for Qt as well, but I have heard about enough bugs to think I
should avoid Qt.  I have used enough Gtk apps that run flawlessly under
Windows to have my hopes that it works well.

>
> ( and I must admit one of the reasons I avoid wx if possible, is because
> I don't use Gnome under Linux and the look and feel of wx applications
> is really horrible under KDE )

My understanding is that wx wraps Windows, OSX, Qt, and GTK+... I guess
some of the wrappers fit the native apps better than others?

Dan



From __peter__ at web.de  Thu Nov 30 05:56:14 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 30 Nov 2006 11:56:14 +0100
Subject: Slicing versus loops, was Re: for i in range() anti-pattern
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
	<ekmb29$hj3$02$1@news.t-online.com>
	<Xns988B6CE4DCDF9duncanbooth@127.0.0.1>
Message-ID: <ekmdav$u3$01$1@news.t-online.com>

Duncan Booth wrote:

> items[::2], items[1::2] = items[1::2], items[::2]

Cool. I really should have found that myself.

Peter



From no-spam at no-spam-no-spam.invalid  Sun Nov 12 09:52:45 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 12 Nov 2006 15:52:45 +0100
Subject: numpy/scipy: correlation
In-Reply-To: <mailman.2114.1163286261.11739.python-list@python.org>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
Message-ID: <ej7cft$8de$1@news.albasani.net>

Robert Kern wrote:
> robert wrote:
>> Is there a ready made function in numpy/scipy to compute the correlation y=mx+o of an X and Y fast: 
>> m, m-err, o, o-err, r-coef,r-coef-err ?
> 
> And of course, those three parameters are not particularly meaningful together.
> If your model is truly "y is a linear response given x with normal noise" then
> "y=m*x+o" is correct, and all of the information that you can get from the data
> will be found in the estimates of m and o and the covariance matrix of the
> estimates.
> 
> On the other hand, if your model is that "(x, y) is distributed as a bivariate
> normal distribution" then "y=m*x+o" is not a particularly good representation of
> the model. You should instead estimate the mean vector and covariance matrix of
> (x, y). Your correlation coefficient will be the off-diagonal term after
> dividing out the marginal standard deviations.
> 
> The difference between the two models is that the first places no restrictions
> on the distribution of x. The second does; both the x and y marginal
> distributions need to be normal. Under the first model, the correlation
> coefficient has no meaning.

Think the difference is little in practice - when you head for usable diagonals. 
Looking at the bivar. coef first before going on to any models, seems to be a more stable approach for the first step in data mining. ( before you proceed to a model or to class-learning .. )

Basically the first need is to analyse lots of x,y data and check for linear dependencies. No real model so far. I'd need a quality measure (coef**2) and to know how much I can rely on it (coef-err). coef alone is not enough. You get a perfect 1.0 with 2 ( or 3 - see below ) points.
With big coef's and lots of distributed data the coef is very good by itself  - its error range err(N) only approx ~ 1/sqrt(N)

One would expect the error range to drop simply with # of points. Yet it depends more complexly on the mean value of the coef and on the distribution at all. 
More interesting realworld cases: For example I see a lower correlation on lots of points - maybe coef=0.05 . Got it - or not?  Thus lower coefs require naturally a coef-err to be useful in practice.

Now think of adding 'boring data':

>>> X=[1.,2,3,4]
>>> Y=[1.,2,3,5]
>>> sd.correlation((X,Y))     # my old func 
(1.3, -0.5, 0.982707629824)   # m,o,coef
>>> numpy.corrcoef((X,Y))
array([[ 1.        ,  0.98270763],
       [ 0.98270763,  1.        ]])
>>> XX=[1.,1,1,1,1,2,3,4]
>>> YY=[1.,1,1,1,1,2,3,5]
>>> sd.correlation((XX,YY))
(1.23684210526, -0.289473684211, 0.988433774639)
>>> 

I'd expect: the little increase of r is ok. But this 'boring data' should not make the error to go down simply ~1/sqrt(N) ...

I remember once I saw somewhere a formula for an error range of the corrcoef. but cannot find it anymore. 

http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient#Trivia
says:
  In MATLAB, corr(X) calculates Pearsons correlation coefficient along with p-value.

Does anybody know how this prob.-value is computed/motivated? Such thing would be very helpful for numpy/scipy too.

http://links.jstor.org/sici?sici=0162-1459(192906)24%3A166%3C170%3AFFPEOC%3E2.0.CO%3B2-Y
tells:  

probable error of r = 0.6745*(1-r**2)/sqrt(N)

A simple function of r and N - quite what I expected above roughly for the N-only dep.. But thus it is not sensitive to above considerations about 'boring' data. With above example it would spit a decrease of this probable coef-err from 

0.0115628571429 to 0.00548453410954 !

And the absolute size of this error measure seems to be too low for just 4 points of data!

The other formula which I remember seeing once was much more sophisticated and used things like sum_xxy etc...


Robert



PS:

my old func is simply hands-on based on 
n,sum_x,sum_y,sum_xy,sum_xx,sum_yy=len(vx),vx.sum(),vy.sum(),(vx*vy).sum(),(vx*vx).sum(),(vy*vy).sum()
Guess its already fast for large data?


Note: numpy.corrcoef strikes on 2 points:
>>> numpy.corrcoef(([1,2],[1,2]))
array([[          -1.#IND,           -1.#IND],
       [          -1.#IND,           -1.#IND]])
>>> sd.correlation(([1,2],[1,2]))
(1, 0, 1.0)
>>> 
>>> numpy.corrcoef(([1,2,3],[1,2,3]))
array([[ 1.,  1.],
       [ 1.,  1.]])
>>> sd.correlation(([1,2,3],[1,2,3]))
(1, 0, 1.0)


PPS:

A compatible scipy binary (0.5.2?) for numpy 1.0 was announced some weeks back. Think currently many users suffer when trying to get started with incompatible most-recent libs of scipy and numpy.


From gagsl-py at yahoo.com.ar  Tue Nov 21 18:49:18 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 20:49:18 -0300
Subject: Help! I need a list, not a pointer to it
In-Reply-To: <20061121225304.67695.qmail@web56001.mail.re3.yahoo.com>
References: <20061121225304.67695.qmail@web56001.mail.re3.yahoo.com>
Message-ID: <7.0.1.0.0.20061121204215.040f31e0@yahoo.com.ar>

At Tuesday 21/11/2006 19:53, Sorin Schwimmer wrote:

>solutions=[]
>matrix=[[1.0], [0], [0]]
>j=0
>while j<c:
>   [...modify matrix...]
>   print matrix
>   solutions.append(matrix) # same result with matrix[:]
>print solutions
>
>gives:
>[[0], [1.0], [0]]
>[[0], [0], [1.0]]
>[[1.0], [0], [0]]
>[[[1.0], [0], [0]], [[1.0], [0], [0]], [[1.0], [0], [0]]]
>(i.e. the last value of matrix, three times)
>
>How can I end up with:
>[[0], [1.0], [0]]
>[[0], [0], [1.0]]
>[[1.0], [0], [0]]
>[[[0], [1.0], [0]], [[0], [0], [1.0]], [[1.0], [0], [0]]]
>(i.e. each value of matrix)?

Using matrix[:] gives you a _shallow_ copy of matrix - a new list, 
but its elements (lists themselves) are the original ones.
You may want to use deepcopy() instead (or redesign your algorithm to 
not use those inner lists).


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From chris at kateandchris.net  Wed Nov 22 13:39:02 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Wed, 22 Nov 2006 13:39:02 -0500
Subject: Programmatically replacing an API for another module
In-Reply-To: <20061122183547.GA3929@kateandchris.net>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<4562de7f$0$21252$426a34cc@news.free.fr>
	<rc57m29qq8m1uebvrkc9g7bcn9li38agdv@4ax.com>
	<20061122183547.GA3929@kateandchris.net>
Message-ID: <20061122183902.GB3929@kateandchris.net>

> > I'm just a bit loathe to download and install more stuff when
> > something simpler appears to be near-at-hand.  ...especially
> > considering the page describing this module doesn't offer any download
> > links!  http://python-mock.sourceforge.net/
> How about mini-mock:
> http://blog.ianbicking.org/minimock.html

Oh yeah, and the download link for python-mock is:
http://sourceforge.net/project/showfiles.php?group_id=138804


From lukasz.langa at gmail.com  Sun Nov 26 17:21:26 2006
From: lukasz.langa at gmail.com (=?UTF-8?B?xYF1a2FzeiBMYW5nYQ==?=)
Date: Sun, 26 Nov 2006 23:21:26 +0100
Subject: The Python Papers Edition One
In-Reply-To: <ek8v7f$lp8$1@sea.gmane.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>	<43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
	<ek8v7f$lp8$1@sea.gmane.org>
Message-ID: <456A1366.5060608@gmail.com>

Fredrik Lundh:
> Tennessee Leeuwenburg wrote:
>
>   
>> If anyone has any good ideas for how to cope as a publisher with these
>> difficulties, I'm all ears.
>>     
>
> has any of the format zealots posting to this thread actually 
> volunteered to produce any material for your publication?  if not, I 
> suggest ignoring them.  any bozo with a keyboard can contribute stop 
> energy to a project, but at the end, it's always the people *doing* 
> things that matters.
>
> </F>

+1

The Python Papers look very, very promising! I'm looking forward to 
reading next editions. Don't let whiners slow you down. PDF is a good 
choice, I personally like to print out longer things I read. IANAL, so I 
won't speak for or against CC licenses. They're used widely nowadays for 
a variety of applications (music, art, software, publications) so it 
seems they're doing their job.

Keep up the good work!

Best regards,
?ukasz Langa


From http  Tue Nov  7 03:19:49 2006
From: http (Paul Rubin)
Date: 07 Nov 2006 00:19:49 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
	<7x7iyafg85.fsf@ruckus.brouhaha.com> <454DC638.2050802@v.loewis.de>
Message-ID: <7x3b8voehm.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> Ah, but in the case where the lock# signal is used, it's known that
> the data is not in the cache of the CPU performing the lock operation;
> I believe it is also known that the data is not in the cache of any
> other CPU. So the CPU performing the LOCK INC sequence just has
> to perform two memory cycles. No cache coherency protocol runs
> in that case.

How can any CPU know in advance that the data is not in the cache of
some other CPU?

> But even when caching is involved, I don't see why there should be
> more than three memory cycles. The MESI "protocol" really consists
> only of two pins: HIT# and HITM#; the actual implementation is just
> in keeping the state for each cache line, and in snooping. There
> CPU's don't really "communicate". Instead, if one processor tries
> to fill a cache line, the others snoop the read, and assert either
> HIT# (when they have not modified their cache lines) or HITM#
> (when they do have modified their cache lines). Assertions of
> these signals is also immediate.

OK, this is logical, but it already implies a cache miss, which costs
many dozen (100?) cycles.  But this case may be uncommon, since one
hops that cache misses are relatively rare.  

> The worst case would be that one processor performs a LOCK INC,
> and another processor has the modified value in its cache line.
> So it needs to first flush the cache line, before the other
> processor can modify the memory. If the memory is not cached
> yet in another processor, the MESI protocol does not involve
> additional penalties.

I think for Python refcounts this case must occur quite frequently
since there are many Python objects (small integers, None, etc.)
whose refcounts get modified extremely often.  

IIRC, the SPJ paper that I linked claims that lock-free protocols
outperform traditional lock-based ones even with just two processors.
But maybe things are better with a dual core processor (shared cache)
than with two separate packages.


From sjmachin at lexicon.net  Wed Nov 22 16:05:37 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 13:05:37 -0800
Subject: X class missing in Python :-) - Re: What's going on here?
In-Reply-To: <ek2cm5$h2$1@news.albasani.net>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
	<ek2cm5$h2$1@news.albasani.net>
Message-ID: <1164229537.289097.172140@l39g2000cwd.googlegroups.com>


robert wrote:
> Dale Strickland-Clark wrote:
> > Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
> > [GCC 4.1.0 (SUSE Linux)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> a = object()
> >>>> a
> > <object object at 0xb7bbd438>
> >>>> a.spam = 1
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > AttributeError: 'object' object has no attribute 'spam'
> >>>> class b(object):
> > ...    pass
> > ...
> >>>> a = b()
> >>>> a
> > <__main__.b object at 0xb7b4dcac>
> >>>> a.spam = 1
> >>>>
> >
> > What is subclassing adding to the class here? Why can't I assign to
> > attributes of an instance of object?
>
>
> Python sooooo dynamic, but it lacks a (builtin) X-class ready for ad-hoc usage just like dict() :-)
> I have in almost every app/toolcore-module this one:
>
> ------
>
> class X(object):
>     def __init__(self,_d={},**kwargs):
>         kwargs.update(_d)
>         self.__dict__=kwargs
> class Y(X):
>     def __repr__(self):
>         return '<Y:%s>'%self.__dict__
>
> ------
>
> x=X(spam=1)
>
> Maybe X should be renamed to __builtin__.Object ...
>
>

Have you considered putting it in one file and *importing* it into
"almost every app/toolcore-module"?

Have you considered that others may like to have something a little
more elaborate, like maybe using the pprint module, or that the amount
of data that would spew out might in some cases be so great that they
wouldn't want that every time from repr(), preferring a dump-style
method that wrote to a logfile?

IMHO that's one of the enormous number of good points about Python; you
can easily lash up something like that to suit yourself and inject it
into any class you like; there's no central authority tying your hands
behind your back.

HTH,
John



From william.peterson at mchsi.com  Wed Nov 15 16:44:54 2006
From: william.peterson at mchsi.com (Bill)
Date: 15 Nov 2006 13:44:54 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <1163627094.880966.264060@h54g2000cwb.googlegroups.com>


walterbyrd wrote:
> Some think it will.
>
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
>
> IMO: it won't make much difference. But I don't really know.

The change might also provide an opportunity for further expansion of
jython, eating into Java "marketshare"



From cgai at ksp-edv.de  Mon Nov  6 04:44:08 2006
From: cgai at ksp-edv.de (Violet Blanchard)
Date: Mon, 6 Nov 2006 10:44:08 +0100
Subject: waterbed presumptuous
Message-ID: <DB959138C35.5A0385F7D@fdp-kierspe.de>

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From Iacopo.Marmo at gmail.com  Thu Nov  9 16:12:12 2006
From: Iacopo.Marmo at gmail.com (Iacopo.Marmo at gmail.com)
Date: 9 Nov 2006 13:12:12 -0800
Subject: how to create a multicolor "font-string" in pygame??
Message-ID: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>

Hi! I need to manipulate multicolor strings, i.e. strings with a color
associated with each letter.
Any suggestions?



From vedran at v-programs.com  Sat Nov 11 13:43:11 2006
From: vedran at v-programs.com (Croteam)
Date: 11 Nov 2006 10:43:11 -0800
Subject: py2exe console removing
Message-ID: <1163270591.454295.315750@f16g2000cwb.googlegroups.com>

Hello,

Can somebody tell me how to I remove console at script installing?



Thanks.



From cameron.walsh at gmail.com  Fri Nov 10 03:09:49 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 10 Nov 2006 16:09:49 +0800
Subject: Printing to file, how do I do it efficiently?
In-Reply-To: <mailman.2021.1163141531.11739.python-list@python.org>
References: <ej155s$n3k$1@enyo.uwa.edu.au>
	<mailman.2021.1163141531.11739.python-list@python.org>
Message-ID: <ej1c44$toj$1@enyo.uwa.edu.au>

Robert Kern wrote:
> Cameron Walsh wrote:
>> Hi all,
>>
>> I have a numpy.array of 89x512x512 uint8's, set up with code like this:
> 
> numpy questions are best asked on the numpy list, not here.

At first I thought it was a generic python question, since it had more
to do with writing array data to file rather than the specific format of
the array data.

> 
>> data=numpy.array([],dtype="uint8")
>> data.resize((89,512,512))
> 
> You might want to look at using numpy.empty() here, instead.
> 

Thanks!

[...]
>> I'm guessing that the slow part is the fact that I am converting the
>> data to character format and writing it one character at a time.  What
>> is a better way of doing this, or where should I look to find a better way?
> 
> data.tostring()
> 

And here I see I was wrong, it was a numpy question.  I assumed the
tostring() method would produce the same output as printing the array to
the screen by just calling "data".  But of course, that would be the job
of the __repr__() method.

It is now ridiculously fast (<1second).  Thank you for your help.

Cameron.


From deets at nospam.web.de  Thu Nov  2 12:02:59 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Nov 2006 18:02:59 +0100
Subject: creating new objects with references to them
In-Reply-To: <1162483976.152660.121200@f16g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
	<1162482760.424782.244760@h48g2000cwc.googlegroups.com>
	<1162483976.152660.121200@f16g2000cwb.googlegroups.com>
Message-ID: <4qumm0Fo82jqU1@uni-berlin.de>

> 
>> Anyway, a simple list of Researchers should suffice for any of these
>> purposes, and assuming you want to commit them all in one hit, you have
>> a list of objects ready to iterate over.
> 
> Ok, so in making a list does this mean that I won't have a name for
> each instance? I just have to iterate over the list when I need them?
> I'm not sure how I would do this if the user chooses just to save a
> single record and not all of them.

It means exactly that, and where is the problem? If the user choses to 
save just one record, she has to somehow select the one in question, 
hasn't she? So, she selects it from the list. And then you _know_ the 
index or even the record itself.

If it helps you, think of the index of the list as the name of the record...


Diez



From walterbyrd at iname.com  Tue Nov 21 11:40:47 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 21 Nov 2006 08:40:47 -0800
Subject: Spyce system requirements?
Message-ID: <1164127246.887153.98820@m7g2000cwm.googlegroups.com>

Does anybody know? What versionof Apache is required? If used with
mod_python, what version of mod_python? Why version of Python is
required?

Any help appreciated, thanx.



From jameshcunningham at gmail.com  Wed Nov 29 08:46:45 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Wed, 29 Nov 2006 08:46:45 -0500
Subject: ANN: CherryPy 3.0 RC1
References: <mailman.817.1164755063.32031.python-list@python.org>
	<1164807466.342293.138760@h54g2000cwb.googlegroups.com>
Message-ID: <2006112908464516807-jameshcunningham@gmailcom>

On 2006-11-29 08:37:46 -0500, "Christian" <christian at dowski.com> said:

>> "Christian Wyglendowski" <christian at dowski.com> writes:
>> 
>>> I'm happy to announce the first release candidate for CherryPy 3.0.
> 
> Ben Finney wrote:
>> 
>> Congratulations, I'm glad to see an announcement for CherryPy.
>> 
>> Please, in future, don't send HTML message bodies to public forums;
>> plain text is far better for such a wide audience.
> 
> My apologies.  I wrongly assumed that anyone using an email client that
> only supported plain text would simply use the plain text part of the
> email.  Thanks for bringing this to my attention.
> 
> Christian
> http://www.dowski.com

Some people are reading this on comp.lang.python.

Best,
James



From jeff at taupro.com  Mon Nov 27 05:06:10 2006
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 27 Nov 2006 04:06:10 -0600
Subject: A Call for Community Input re PyCon Slogans/Swag
Message-ID: <456AB892.4080304@taupro.com>

The PyCon organizers have established a short online poll to collect input 
from the Python community regarding the shirts, tote bag and slogans to be 
used at PyCon 2007, being held in Addison (Dallas), Texas Feb 23-25 2007.

When we put out a prior call for slogan suggestions, we received 104 
submissions.  We've since reviewed them, narrowed them down to a number 
reasonable for voting on, and now you can help us decide the winner!  Actually 
we're looking for two winners, one slogan for the T-shirt and another for the 
tote bag.

Please take the poll at the following page.  We've tried to keep it short, to 
respect your time.

   http://us.pycon.org/swagpoll

Thanks!

Jeff Rush
Co-Chair PyCon 2007


From fuzzyman at gmail.com  Tue Nov  7 19:18:15 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Nov 2006 16:18:15 -0800
Subject: [ANN] Movable Python 2.0.0 Beta 2
Message-ID: <1162945095.589606.174290@f16g2000cwb.googlegroups.com>

I'm pleased to announce the release of `Movable Python 2.0.0 Beta 2
<http://www.voidspace.org.uk/python/movpy/>`_.

There are now updated versions for Python 2.2 - 2.5, the Mega-Pack
[#]_, and the free trial version.

The most important changes in this release are :

* Fixes for Pythonwin. The 'run' button and 'grep' dialog now work.
* You can now specify a directory for config files.
* The environment programs are run in is no longer pre-populated with
variables. The **Movable Python** variables are now in a module called
``movpy``.

You can see the full `changelog
<http://www.voidspace.org.uk/python/movpy/changelog.html>`_ below.

You can download the updated version from :

    `Movable Python Download Pages
<http://voidspace.tradebit.com/groups.php>`_

You can get the free trial version, from

    `Movable Python Demo & Other Files
<http://www.tradebit.com/usr/voidspace/files.php/7007>`_


What is Movable Python
==================

**Movable Python** is a distribution of Python, for Windows, that can
run without being installed. It means you can carry a full development
environment round on a USB stick.

It is also useful for testing programs with a 'clean Python install',
and testing programs with multiple versions of Python.

The GUI program launcher makes it a useful programmers tool, including
features like :

* Log the output of all Python scripts run
* Enable Psyco for all scripts
* Quick Launch buttons for commonly used programs
* Configure multiple interpreters for use from a single interface

It comes with the Pythonwin IDE.

Plus many other features and bundled libraries.


What's New ?
==========


The changes in version 2.0.0 Beta 2 include :

(Many thanks to Schipo and Patrick Vrijlandt for bug reports, fixes and
suggestions.)

Updated to Python 2.4.4 and wxPython 2.7.1

Fixed the bug with pylab support.

Fixed problem with global name scope in the interactive interpreter.

Everything moved out of the default namespace and moved into a module
called 'movpy'. This contains :

* ``filename`` = the path to the script we are running (the executable
in interactive mode)
* ``filedir`` = the directory that script is in (None when in
interactive mode)
* ``movpydir`` = the directory of the movpy executable
* ``curdir`` = the cwd from which we have been called
* ``configdir`` = the directory where config files are accessed from
* ``libdir`` = the 'lib' directory that modules/packages are contained
in
* ``commandline`` != '' if '-c' was used
* ``go_interactive`` = True if '-i' was set.
* ``interactive`` = True if we are in an interactive session
* ``interactive_mode`` is a function to enter interactive mode

    ``interactive_mode(localvars=None, globalvars=None, IPOFF=False,
argv=None)``

* ``movpyw`` = True if we are running under movpyw rather than movpy

The docs menu option will now launch the local version if available.

Logfile is now closed using 'atexit' (should be closed *after* other
'atexit' functions finish).

Logfile is flushed after every write to keep it in sync.

A new command line option to specify the config file directory.

    ``movpyw --config ~\movpyfiles\config``

(The '~' is expanded to mean the user directory.)

Fix for grep in Pythonwin IDE.

Fix so that 'run' works in Pythonwin. (Browse button is disabled.)



.. [#] The `Mega-Pack
<http://www.voidspace.org.uk/python/movpy/megapack.html>`_ is all the
interpreters bundled together. It comes pre-configured so that you can
test programs with any version of Python (including IronPython) from a
single interface.



From steve at holdenweb.com  Wed Nov  1 21:24:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 02:24:01 +0000
Subject: logo design
In-Reply-To: <1162432978.995731.291980@f16g2000cwb.googlegroups.com>
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
	<1162432978.995731.291980@f16g2000cwb.googlegroups.com>
Message-ID: <eibkpr$55t$1@sea.gmane.org>

alex23 wrote:
> Xah Lee wrote:
> 
>>No personal offense intended, but human animal's history is what? 3000
>>years at least in recorded history? And, all you can think of is what,
>>the view points of a fraction of your personal life span?
> 
> 
> Thank god evolution spat you out to lead us all to the light, huh?
> 
> No personal offense intended, but you're a boring, elitist prick.
> 
> - alex23
> 
This conversation has clearly descended to the level where it needs to 
be taken to email. Nobody wants to read this.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From mail at microcorp.co.za  Fri Nov 17 01:12:21 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 08:12:21 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com><ejhcdm$3pv$1@wake.carmen.se>
	<ejhdnt$hq6$1@sea.gmane.org>
Message-ID: <035301c70a1f$3d4144a0$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:

> have anyone counted the number of colons used in this way by the OP,
> in his first few posts ?  (if there isn't a name for the law that
> states that the number for a "let's remove the colons" proposal is 
> always greater than zero, someone should come up with one...)

You just have - how do you want it to be immortalised?

The effbot's law of colonic inevitability?

- Badger (for Steve)



From e0427417 at student.tuwien.ac.at  Sat Nov 25 17:17:09 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Sat, 25 Nov 2006 23:17:09 +0100
Subject: my small hashlib - using pythons hash-functions
In-Reply-To: <mailman.723.1164489958.32031.python-list@python.org>
References: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>	<7x7ixjp7c2.fsf@ruckus.brouhaha.com>	<4568b17a$0$11868$3b214f66@tunews.univie.ac.at>
	<mailman.723.1164489958.32031.python-list@python.org>
Message-ID: <4568c06d$0$10578$3b214f66@tunews.univie.ac.at>

Fredrik Lundh wrote:
> Mathias Panzenboeck wrote:
> 
>> But the question is: *IS* this derived work? I mean, it's not copied 
>> code.
>> It's the same hashing-logic, which I learned by watching pythons code.
> 
> given that it's only a few lines of code, and there's hardly any other 
> way to write those lines if you want to implement the same algorithm, 
> I'd say it falls under "fair use".  crediting the Python developers in 
> the source code should be good enough.
> 
> </F>
> 

ic. I'll write a mail to the python developers then.

The code in python looks like this (see code underneath), just if someone what's to know.
I only used the logic of the parts I understand. ;)

Objects/stringobject.c:

static long
string_hash(PyStringObject *a)
{
	register Py_ssize_t len;
	register unsigned char *p;
	register long x;

	if (a->ob_shash != -1)
		return a->ob_shash;
	len = a->ob_size;
	p = (unsigned char *) a->ob_sval;
	x = *p << 7;
	while (--len >= 0)
		x = (1000003*x) ^ *p++;
	x ^= a->ob_size;
	if (x == -1)
		x = -2;
	a->ob_shash = x;
	return x;
}

Objects/dictobject.c:

static dictentry *
lookdict_string(dictobject *mp, PyObject *key, register long hash)
{
	register size_t i;
	register size_t perturb;
	register dictentry *freeslot;
	register size_t mask = (size_t)mp->ma_mask;
	dictentry *ep0 = mp->ma_table;
	register dictentry *ep;

	/* Make sure this function doesn't have to handle non-string keys,
	   including subclasses of str; e.g., one reason to subclass
	   strings is to override __eq__, and for speed we don't cater to
	   that here. */
	if (!PyString_CheckExact(key)) {
#ifdef SHOW_CONVERSION_COUNTS
		++converted;
#endif
		mp->ma_lookup = lookdict;
		return lookdict(mp, key, hash);
	}
	i = hash & mask;
	ep = &ep0[i];
	if (ep->me_key == NULL || ep->me_key == key)
		return ep;
	if (ep->me_key == dummy)
		freeslot = ep;
	else {
		if (ep->me_hash == hash && _PyString_Eq(ep->me_key, key))
			return ep;
		freeslot = NULL;
	}

	/* In the loop, me_key == dummy is by far (factor of 100s) the
	   least likely outcome, so test for that last. */
	for (perturb = hash; ; perturb >>= PERTURB_SHIFT) {
		i = (i << 2) + i + perturb + 1;
		ep = &ep0[i & mask];
		if (ep->me_key == NULL)
			return freeslot == NULL ? ep : freeslot;
		if (ep->me_key == key
		    || (ep->me_hash == hash
		        && ep->me_key != dummy
			&& _PyString_Eq(ep->me_key, key)))
			return ep;
		if (ep->me_key == dummy && freeslot == NULL)
			freeslot = ep;
	}
}


From mahs at telcopartners.com  Fri Nov 17 18:50:31 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 17 Nov 2006 15:50:31 -0800
Subject: Slicing / subsetting list in arbitrary fashion
In-Reply-To: <455DF764.50105@lind-beil.net>
References: <455DF764.50105@lind-beil.net>
Message-ID: <ejlhvu$4sm$1@sea.gmane.org>

Gregg Lind wrote:
> I wish something like this was part of the standard python installation, 
> and didn't require one to use Numpy or Numarray.  This sort of list 
> subsetting is useful in many, many contexts. 
> 
Many of numpy's multi-dimensional slicing and indexing operations are 
implemented (for list and array.array types) in pure python in my pyarray module:

http://svn.brownspencer.com/pyarray/trunk/

Michael



From noway at sorry.com  Sun Nov 12 19:05:08 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Mon, 13 Nov 2006 01:05:08 +0100
Subject: Find interface associated with default route?
References: <ej6vr6$17a$1@sea.gmane.org>
	<ej705n$2n9$1@sea.gmane.org><ej72eg$7hr$1@sea.gmane.org>
	<mailman.9.1163337899.32031.python-list@python.org>
Message-ID: <DEO5h.3687$mZ5.1851@tornado.fastwebnet.it>

Neal Becker wrote:

> A quick strace reveals that 'route' just reads /proc/net/route, so:
>
> def get_default_if():
>     f = open ('/proc/net/route', 'r')
>     for line in f:
>         words = string.split (line)
>         dest = words[1]
>         try:
>             if (int (dest) == 0):
>                 interf = words[0]
>                 break
>         except ValueError:
>             pass
>     return interf

And if you acknowledge that /proc/net/route is a CSV file, you can be more
terse and clear:

>>> import csv
>>> def get_default_if():
...     f = open('/proc/net/route')
...     for i in csv.DictReader(f, delimiter="\t"):
...             if long(i['Destination'], 16) == 0:
...                     return i['Iface']
...     return None
...
>>>
>>> get_default_if()
'ppp0'

-- 
Giovanni Bajo




From george.sakkis at gmail.com  Sun Nov  5 17:25:59 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 5 Nov 2006 14:25:59 -0800
Subject: simple way to un-nest (flatten?) list
References: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>
Message-ID: <1162765559.400161.306330@m73g2000cwd.googlegroups.com>

djc wrote:

> There is I am sure an easy way to do this, but I seem to be brain dead
> tonight. So:
>
> I have a table such that I can do
>
>   [line for line  in table if line[7]=='JDOC']
> and
>   [line for line  in table if line[7]=='Aslib']
> and
>   [line for line  in table if line[7]=='ASLIB']
> etc
>
> I also have a dictionary
>   r=  {'a':('ASLIB','Aslib'),'j':('JDOC', 'jdoc')}
> so I can extract values
> r.values()
> [('ASLIB', 'Aslib'), ('JDOC', 'jdoc')]
>
> I would like to do
>
> [line for line  in table if line[7] in ('JDOC','jdoc','Aslib','ASLIB')]
>
> so how should I get from
> {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> to
> ('Aslib','ASLIB','JDOC','jdoc')

Meet itertools:

from itertools import chain
names = set(chain(*r.itervalues()))
print [line for line in table if line[7] in names]


George



From george.sakkis at gmail.com  Tue Nov 21 19:42:05 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Nov 2006 16:42:05 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <1164156125.862887.314480@f16g2000cwb.googlegroups.com>

walterbyrd wrote:

> Reading "Think Like a Computer Scientist" I am not sure I understand
> the way it describes the way objects work with Python.
>
> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?

For user-defined (i.e. not builtin) classes, yes. There are ways to
prevent this (or at least it make it harder), but they're usually not
worth it unless you have pretty good reasons to do it. And just in case
you're wondering, "that's how php/c++/java/whatever does it" doesn't
count as a pretty good reason.

> 2) Are classes typically created like this:
>
> class Point:
>   pass
>
> Then attributes are added at some other time?

Yes, you can do it. No, it is not typical. The typical is to initialize
all class attributes in the class body, and all instance attributes in
__init__:

class Point(object):            # prefer new-style classes in new code
    num_instances = 0           # a class attribute

    def __init__(self, x, y):
        self.x, self.y = x,y     # instance attributes

There are cases where this is not possible or desirable; Python doesn't
get in your way in these cases, but they are certainly not typical.

> 3) What is with the __underscores__ ??

They're special attributes, usually methods that perform "operator
overloading". If the term doesn't mean anything to you, think of it as
a method that is called implicitly by a specific operator. E.g. instead
of having a normal method add() and then call it as a.add(b), you can
define the special method __add__ and have it called when you write a +
b. There are several details I left out but that's the gist of it.

> 4) Are parameters passed to an class definition?
>
> class Whatever(params):
>    pass

No, these are not parameters, they are the base (aka "super") clasess
of Whatever.

> I sort-of understand the way objects work with PHP. With PHP, the
> classes are defined in one place - sort of like a function. To me, that
> makes more sense.

It makes sense in Python too, see point (2). The difference is that for
the few cases that it either doesn't make sense or it's less convenient
or desirable, Python doesn't get in your way.

HTH,
George



From gagsl-py at yahoo.com.ar  Fri Nov 24 19:29:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 21:29:41 -0300
Subject: Capture file descriptors while running an external program
In-Reply-To: <1164199248.3lj9jkctog8w@w3.mail.sapo.pt>
References: <1164199248.3lj9jkctog8w@w3.mail.sapo.pt>
Message-ID: <7.0.1.0.0.20061124211949.03970ad0@yahoo.com.ar>

At Wednesday 22/11/2006 09:40, jfigueiras at sapo.pt wrote:

>I have a problem with the module subprocess!
>The problem is that the external software that I am running under
>subprocess.Popen opens stdin, stdout, stderr, and other file descriptors to
>write and read in the hard drive.

As many other programs...

>I know how to capture stdin, stdout and stderr, what I cannot do is to capture
>the other file-descriptors. Is there any way to wrap those non-standard file
>descriptors and make them write and read from a specific object that I define?
>I know that I can use tmp files to do that, but i would like something running
>without tmp files.

I'm not sure what you mean by "non-standard file descriptors". The 
other program is free to open, read, write, etc any file he wants - 
are you trying to trap any file operation it may want to do?
You *could* do such things -google for "code injection" and "API 
hooking"- but I doubt it's what you really want.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From peter.mosley at talk21.com  Fri Nov 10 03:56:52 2006
From: peter.mosley at talk21.com (peter)
Date: 10 Nov 2006 00:56:52 -0800
Subject: Tkinter check box behaviour - Windows / Linux discrepancy
References: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
	<mailman.2007.1163118021.11739.python-list@python.org>
Message-ID: <1163149012.716314.64340@h48g2000cwc.googlegroups.com>

Thank you for those suggestions

I've tried it on Windows and it seems fine (with the minor change to
command=self.chkTest_click).  I'm currently at work, with no access to
Linux, so can't test it there until this evening.  

Muchas gracias!



From nancydonnelly2006 at yahoo.com  Tue Nov 21 06:12:49 2006
From: nancydonnelly2006 at yahoo.com (Nancy Donnelly)
Date: Tue, 21 Nov 2006 03:12:49 -0800 (PST)
Subject: Error Compiling Python Program
Message-ID: <20061121111249.39412.qmail@web90308.mail.mud.yahoo.com>

7575Hi;
I'm trying to install python-ldap-2.2.1.tar.gz on Python 2.3.5/FreeBSD 6.1 but I get this error:

python setup.py install
running install
running build
running build_py
error: package directory 'Lib' does not exist

How can I troubleshoot this?
TIA,
Nancy



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From XX.XmcX at XX.XmclaveauX.com  Sat Nov 25 07:56:14 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sat, 25 Nov 2006 13:56:14 +0100
Subject: Try to stop thread Using flag
References: <1164456728.261093.184820@h54g2000cwb.googlegroups.com>
Message-ID: <mn.cb447d6bff7b3733.46195@XX.XmclaveauX.com>


    http://candygram.sourceforge.net/

-- 
@-salutations

Michel Claveau




From m.yanowitz at kearfott.com  Tue Nov 21 11:33:45 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Tue, 21 Nov 2006 11:33:45 -0500
Subject: Software Compatible with other versions?
In-Reply-To: <456328B2.3080303@tim.thechases.com>
Message-ID: <006201c70d8a$d00c3f60$0d7d12ac@kearfott.com>



-----Original Message-----
From: python-list-bounces+m.yanowitz=kearfott.com at python.org
[mailto:python-list-bounces+m.yanowitz=kearfott.com at python.org]On Behalf
Of Tim Chase
Sent: Tuesday, November 21, 2006 11:26 AM
To: Laurent Pointal
Cc: python-list at python.org
Subject: Re: Software Compatable with other versions?

>>>> I have been told that the .pyc are not compatable. Is it 
>>>> possible, to convert a 2.4.x .pyc to a 2.5 .pyc?
>> 
>> The magic code.
>> 
>> Just rm -rf *.pyc from your own scripts directories, they will
>> be rebuilt.
>
> Just take care in the event that you have files that were 
> distributed in bytecode format (.pyc) rather than source 
> form...if you don't have any such .pyc files, then Laurent's 
> solution is fast and easy.  If you do, you may have to protect 
> them before trying such a stunt.
>
> -tkc

  Yeah, that is my concern. We are mostly doing Windows and Linux.
Due to some "export restriction", we are not allowed to distribute 
the .py files, and so distribute .pyc file.
  We also distribute the installer for Python 2.4.3 but do not
require them to use it if they already have Python installed.
  Thus if we build with version 2.4.3, and distribute the .pyc files
for 2.4.3 there is no way to make these .pyc files work if they
use the latest 2.5 or some version before 2.4.x.

Thanks in advance:
Michael Yanowitz




From deets at nospam.web.de  Fri Nov 10 12:47:45 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 10 Nov 2006 18:47:45 +0100
Subject: Need help with Subversion bindings
In-Reply-To: <1163170768.284700.95640@e3g2000cwe.googlegroups.com>
References: <1163170768.284700.95640@e3g2000cwe.googlegroups.com>
Message-ID: <4rjs9vFrrl52U1@mid.uni-berlin.de>

paul.keating at nibc.com schrieb:
> I'm trying to write a basic Subversion client because I need to
> integrate Subversion with a product that keeps source code in a
> database (so it has no notion of "working copy").
> 
> I have tried to translate the simple C examples in Garrett Rooney's
> book into Python, but the very clever SWIG stuff has made the Python
> access so different from the corresponding C that I can't do it.
> 
> Example: I can create an apr array but I have no idea how to insert
> something into it. In C you use APR_ARRAY_PUSH. In Python that doesn't
> exist. Another example: I can create an apr hash, but I can't work out
> how to look inside it. In C it is a struct with members count and max
> etc. In Python it is a class  that doesn't remotely resemble the
> struct.
> 
> Has anyone got a bare-bones bit of working Python that shows how to do
> (say) an add or a checkout? There is an example of status in the
> Subversion book but it's a toy: it doesn't show how you create an
> authentication callback so it will only work locally.

The nice python-ide eric3, written in python itself, features a 
subversion interface. Maybe you can take a look at that?

Diez


From fredrik at pythonware.com  Mon Nov 13 08:17:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 14:17:37 +0100
Subject: httplib.InvalidURL: nonnumeric port: For characters in
	theproxypassword in URL
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com><1163419232.632721.192360@i42g2000cwa.googlegroups.com><mailman.52.1163419946.32031.python-list@python.org>
	<1163423258.919153.281260@b28g2000cwb.googlegroups.com>
Message-ID: <ej9r9h$qjp$1@sea.gmane.org>

"Phoe6" wrote:

> - use urllib.quote() to covert the proxy url to a quoted one.

you should use quote to convert the *password* to quoted form, not use it on
the entire URL.

</F> 





From steve at holdenweb.com  Tue Nov  7 21:40:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 21:40:18 -0500
Subject: object data member dumper?
In-Reply-To: <45510cc9$0$12164$88260bb3@free.teranews.com>
References: <4550cddd$0$12104$88260bb3@free.teranews.com>	<4550f442$0$20337$426a34cc@news.free.fr>	<mailman.1864.1162938322.11739.python-list@python.org>
	<45510cc9$0$12164$88260bb3@free.teranews.com>
Message-ID: <eirg09$q5l$1@sea.gmane.org>

tom arnall wrote:
> Steve Holden wrote:
> 
> 
>>Bruno Desthuilliers wrote:
>>
>>>tom arnall a ?crit :
>>>
>>>
>>>>does anyone know of a utility to do a recursive dump of object data
>>>>members?
>>>>
>>>
>>>
>>>What are "object data members" ? (hint: in Python, everything is an
>>>object - even functions and methods).
>>>
>>>What is your real use case ?
>>
>>Basically it sounds like the OP wants to see the attribute values for an
>>object (and those objects' attribute values, ...). Presumably the
>>recursive descent could be stopped at the built-in types.
> 
> 
> Yes, exactly. But what is 'OP'?
> 
"original poster" (you)
> 
>>I'm not familiar with any such thing. 
> 
> 
> I'm amazed that there is no way to easily look at the fundamental data
> structures of a python program. I'm new to python - is there something I
> don't know about the territory in this regard?
> 
Well, new enough to be unaware that Python normally doesn't need such 
drastic measures for debugging. When you are building complex data 
structures such a form of output could get big really quickly. I've 
never come across anything like it in any other language that I have used.

The most that's usually required is a __repr__() method that dumps the 
values of necessary data attributes.
> 
>>The code of the standard library's
>>pprint module might be a good place to start 
> 
> 
> I played around with this but it seems more targetted to looking at python
> objects as opposed to user-defined.
> 
It is, but it could be used as a basis for something more to your liking.
> 
>>(and the suggested
>>functionality might make a nice addition if we could work out exactly
>>what the requirement was).
> 
> 
> I would be glad if people would comment on my example as a step in this
> direction.
> 
I'd suggest you instead consider a mixin object that will add recursive 
data dump functionality to any such classes you require.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From Tim.Golden at viacom-outdoor.co.uk  Tue Nov 14 08:52:18 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Nov 2006 13:52:18 -0000
Subject: sqlite3 views, if not exists clause
In-Reply-To: <4559c572$0$560$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B5DF@vogbs009.gb.vo.local>

[Josh]

| I'm running into a problem when trying to create a view in my sqlite 
| database in python. I think its a bug in the sqlite3 api that 
| comes with python 2.5.

| THIS DOES NOT WORK, but it should!
|   conn = sqlite3.connect(':memory:')
|   conn.execute("create table foo (a int,b int)")
|   conn.execute('create view if not exists bar as select * from foo')
| it fails with exception "sqlite3.OperationalError: near 
| "not": syntax error"

Not a bug with the "sqlite3 api that comes with python 2.5." as such,
since .execute pretty much passes its parameters through to the database
engine. Rather, the syntax you're using is a relatively late addition
to the sqlite libs -- at least it fails on my 3.2.1 version of the
sqlite3 commmand-line tool, but succeeds on the latest download (3.3.8).

I presume therefore that you build of Python is linked against an
older version of the sqlite libraries / DLL.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
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From e0427417 at student.tuwien.ac.at  Sun Nov 19 15:35:24 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Sun, 19 Nov 2006 21:35:24 +0100
Subject: a few extensions for the itertools
Message-ID: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>

I wrote a few functions which IMHO are missing in python(s itertools).

You can download them here:
http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104

A short description to all the functions:

icmp(iterable1, iterable2) -> integer
	Return negative if iterable1 < iterable2,
	zero if iterable1 == iterable1,
	positive if iterable1 > iterable1.

isum(iterable, start=0) -> value
	Returns the sum of the elements of a iterable
	plus the value of parameter 'start'.  When the
	iterable is empty, returns start.


iproduct(iterable, start=0) -> value
	Returns the product of the elements of a iterable
	times the value of parameter 'start'.  When the
	iterable is empty, returns start.


forall(predicate, iterable, default=True) -> bool
	Returns True, when for all elements x in iterable
	predicate(x) is True. When the iterable is empty,
	returns default.


forany(predicate, iterable, default=False) -> bool
	Returns True, when for any element x in iterable
	predicate(x) is True. When the iterable is empty,
	returns default.


take(n,iterable) -> iterator
	returns a iterator over the first n
	elements of the iterator


drop(n,iterable) -> iterable
	drops the first n elemetns of iterable and
	return a iterator over the rest


heads(iterable) -> iterator over all heads
	example:
	for head in heads([1,2,3,4,5,6,7,8,9]):
		print head

	output:
	[]
	[1]
	[1, 2]
	[1, 2, 3]
	[1, 2, 3, 4]
	[1, 2, 3, 4, 5]
	[1, 2, 3, 4, 5, 6]
	[1, 2, 3, 4, 5, 6, 7]
	[1, 2, 3, 4, 5, 6, 7, 8]
	[1, 2, 3, 4, 5, 6, 7, 8, 9]


tails(iterable) -> iterator over all tails
	example:
	for tail in tails([1,2,3,4,5,6,7,8,9]):
		print tail

	output:
	[1, 2, 3, 4, 5, 6, 7, 8, 9]
	[2, 3, 4, 5, 6, 7, 8, 9]
	[3, 4, 5, 6, 7, 8, 9]
	[4, 5, 6, 7, 8, 9]
	[5, 6, 7, 8, 9]
	[6, 7, 8, 9]
	[7, 8, 9]
	[8, 9]
	[9]
	[]


fcain(funct,*functs) -> function(...,***)
	fcain(f1,f2,...,fn)(*args,*kwargs) equals f1(f2(...fn(*args,*kwargs)))


From Thomas.Ploch at gmx.net  Thu Nov 30 13:28:43 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 19:28:43 +0100
Subject: Automatic increment
In-Reply-To: <8094b1b60611301008n36969305p48bec2c8a0e10ec1@mail.gmail.com>
References: <8094b1b60611301008n36969305p48bec2c8a0e10ec1@mail.gmail.com>
Message-ID: <456F22DB.9080605@gmx.net>

Gheorghe Postelnicu schrieb:
> Hi,
> 
> I have a situation of the following type:
> 
> for line in lineList:
>     for item in line.split()
>         myArray[counter, itemCounter]
>         itemCounter = itemCounter + 1
>     counter = counter +1
> 
> Is there a way to get rid of the manual incrementation of the 2 counters?
> 
> Thanks,

for counter in xrange(len(lineList)):
	for itemCounter in xrange(len(lineList[counter].split()))
		myArray[counter, itemCounter]

Thomas


From sjmachin at lexicon.net  Thu Nov 16 03:14:08 2006
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 16 Nov 2006 19:14:08 +1100
Subject: Yield
In-Reply-To: <mailman.227.1163664079.32031.python-list@python.org>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
Message-ID: <455c1ddf@news.eftel.com>

On 16/11/2006 7:00 PM, Fredrik Lundh wrote:
> John Machin wrote:
> 
>>> I would like to thanks Fredrik for his contribution to improve that.
>>
>> Call me crazy, but after an admittedly quick read, the version on the 
>> wiki seems to be about word for word with on the docs.python.org version.
> 
> maybe he was thinking about the article I posted, or the FAQ link I 
> posted in a followup:
> 
>     http://effbot.org/pyfaq/what-is-a-generator.htm
> 
> which was based on my article and the glossary entry from the tutorial:
> 
>     http://effbot.org/pytut/glossary.htm#generator

Quite possibly.

> 
>> Could you please tell us how you think the wiki version is an 
>> improvement?
> 
> an "add comment" link?  direct URL:s for all concepts in the language? 
> extensive hyperlinking?  semantic retargetable markup?

Yes, they're great. Maybe I was thinking about the text contents only :-)

Cheers,
John


From http  Fri Nov  3 02:25:15 2006
From: http (Paul Rubin)
Date: 02 Nov 2006 23:25:15 -0800
Subject: Javascript is turning into Python?!
Message-ID: <7xwt6dkn50.fsf@ruckus.brouhaha.com>

[Correction of earlier accidental crosspost]

I hadn't seen this before.  New Javascript 1.7 features:

- Generators
- Iterators
- Array comprehensions
- Destructuring assignment

Sounds like another language we know.

http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7


From antonioskatsikadamos at yahoo.com  Wed Nov  8 05:31:33 2006
From: antonioskatsikadamos at yahoo.com (Antonios Katsikadamos)
Date: Wed, 8 Nov 2006 02:31:33 -0800 (PST)
Subject: MODULE mx.DateTime
Message-ID: <20061108103133.46775.qmail@web58104.mail.re3.yahoo.com>

Hi all. I am using python2.4 on suse linux 10.1 and i want to import the mx.DateTime module. does anyone know where i can find this module and how i can install it on linux?

I would appreciate any help.

thnx a lot 

kind regards,

Antonios


 
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From tom at t0mb.net  Sat Nov 18 17:32:08 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 22:32:08 +0000
Subject: syntax error in sum(). Please explicate.
In-Reply-To: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
Message-ID: <455F89E8.4080206@t0mb.net>

Michael Press wrote:
> I have not written python codes nor run any. I saw this
> code posted and decided to try it. It fails. I read the
> tutorial and the entry for the built in function sum,
> but still do not see the problem. The code was cut and
> paste. Please help. Thanks.
>
> _________________________BEGIN_CODE_________________________
> #!/usr/bin/python
>
> ps = [none, 2,3,5,7,11,13,17,19,23,29]
>
>   
None has a capital N ^ 
> def phi(x, a):
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>
> def pi(n):
>     from math import sqrt
>     if n <= 1:
>         return 0
>     a = pi(int(sqrt(n)))
>     return phi(n, a) + a - 1
> __________________________END_CODE__________________________
>
> Here is the result of running it:
>
>   File "/Users/mdp/source/prime_counter_python", line 6
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>                                           ^
> SyntaxError: invalid syntax
>
>   
can you paste the complete code?  I'm not sure why that's a syntax error 
there.  with a bit of fudging it seems to run in the interpreter ok...
> Here are some lines from python -v:
>
> Python 2.3 (#1, Sep 13 2003, 00:49:11) 
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
> Type "help", "copyright", "credits" or "license" for more information
>
>   



From me at tim-adler.com  Tue Nov 28 03:01:37 2006
From: me at tim-adler.com (Tim Adler)
Date: 28 Nov 2006 00:01:37 -0800
Subject: Error when installing the Python Imaging Library
Message-ID: <1164700897.128779.180580@j44g2000cwa.googlegroups.com>

Hey everybody,

I'm quite new to Python. I'm working on a webproject with Django and
need to install the Python Imaging Library. It worked fine under Mac OS
but when I try it on my Linux server. It gives me this error:

PasteBin Link: http://phpfi.com/179314

I don't really know what is wrong. Can somebody point me directions. I
really need the PIL to work.

Thx, Tim



From bbull at optiosoftware.com  Fri Nov  3 16:49:17 2006
From: bbull at optiosoftware.com (WakeBdr)
Date: 3 Nov 2006 13:49:17 -0800
Subject: WSDL?
In-Reply-To: <454ba334$0$12110$88260bb3@free.teranews.com>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
Message-ID: <1162590557.043667.20130@m73g2000cwd.googlegroups.com>

XMLRPC and SOAP are the two I'm working with right now.


tobiah wrote:
> Is WSDL the right answer for in house communication
> between programs written in different languages, or
> is it more for publishing interfaces for use by parties
> outside your own company?
>
> What else is available for sharing complex structures
> with processes running programs that were written in
> other languages?
>
> Thanks,
>
> Toby
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com



From aj108778 at gmail.com  Sun Nov 12 02:14:32 2006
From: aj108778 at gmail.com (Doug)
Date: 11 Nov 2006 23:14:32 -0800
Subject: Fredrik Lundh [was "Re: explicit self revisited"]
In-Reply-To: <mailman.2119.1163289905.11739.python-list@python.org>
References: <ej5fuv$a4a$1@online.de>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2119.1163289905.11739.python-list@python.org>
Message-ID: <1163315672.921664.306460@e3g2000cwe.googlegroups.com>


Fredrik Lundh wrote:
> Doug wrote:
>>
>> Fredrik Lundh wrote:
>>> Fredrik Lundh wrote:
>>> > cannot all you clueless trolls who cannot think of a single useful thing
>>> > to contribute to Python start your own newsgroup?
>>
>>> and before anyone complains; please note that they're working through
>>
>>>      http://www.effbot.org/pyfaq/design-index.htm
>>
>> That site is a bunch of FUD -
>> The explicit self is there simply because OOP was tacked onto python as
>> an afterthought.
>> Why not just be honest about it.  It's too late to change Python's
>> syntax.  It just means a little extra typing.  If it really bothers
>> someone, use "s" instead of "self" or else use Ruby.
>
> the official FAQ is a bunch of FUD?  are you sure you know what FUD means?
>
> </F>

You idiot.  Putting the word "official" in front of something doesn't
mean it can't be FUD.  Especially when it is written by people such as
yourself.  Have you not paid attention to anything happening in
politics around the world during your lifetime?
And yes, actually, the dash after FUD was where I was going to link to
a definition of FUD to show I really meant to use that term.  It
doesn't appear that you believe anything that isn't on your own effbot
site, however.



From deets at nospam.web.de  Thu Nov  9 17:55:46 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Nov 2006 23:55:46 +0100
Subject: Simple question to split
In-Reply-To: <4rhov8Frk45nU1@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
Message-ID: <4rhpvgFrneqhU2@mid.uni-berlin.de>

Matthias Winterland schrieb:
> Hi,
> 
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
> single split-call?

Nope. But you could replace the commas with spaces, and then split.

Diez


From rrr at ronadam.com  Thu Nov 16 14:22:47 2006
From: rrr at ronadam.com (Ron Adam)
Date: Thu, 16 Nov 2006 13:22:47 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejheig$jai$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>	<ejhcdm$3pv$1@wake.carmen.se>	<ejhdnt$hq6$1@sea.gmane.org>
	<ejheig$jai$1@sea.gmane.org>
Message-ID: <ejie1d$45n$1@sea.gmane.org>

Steve Holden wrote:

> I'm always surprised by the amount of energy that's put into this type 
> of discussion - even the OP has suggested that this isn't a big issue. 
> If it's not a big issue why is this thread still going? Every language 
> has a syntax. Why not just accept it as a given and get on with more 
> productive activities?

It's because it's not an issue with an obviously (clear to everyone) good or bad 
answer.

     Obvious bad answer ->  short discussion

     Obvious good answer  ->  short discussion which spawns many long discussion 
about the not so obviously details.

   * Nearly a toss up -> really long discussion that rehashes things over and 
over from various micro points of view.

Even though it's pretty much known this won't change, people still want the 
clarity of an obvious answer even if an obvious solution doe not exist, so the 
thread continues.  And of course what is obvious or not isn't obvious to 
everyone, so that too is a long discussion. ;-)

But I think this thread has a second underlying attribute that appeals to the 
participants.  It isn't so much an effort to change anything as it is an effort 
to explore and understand why things where made the way they are.  To those who 
already know, this seems silly, but to those who are still learning, it seems 
important.

This could be broken down a bit more, but then we would get into long debates on 
the best non-obvious ways to do that. ;-)

Cheers,
    Ron






From chris at kateandchris.net  Mon Nov 20 15:54:45 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Mon, 20 Nov 2006 15:54:45 -0500
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
In-Reply-To: <1164050436.816237.63130@b28g2000cwb.googlegroups.com>
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
	<mailman.8.1163336252.32031.python-list@python.org>
	<1163579122.362383.203240@k70g2000cwa.googlegroups.com>
	<mailman.187.1163579886.32031.python-list@python.org>
	<1164050436.816237.63130@b28g2000cwb.googlegroups.com>
Message-ID: <20061120205445.GA29413@kateandchris.net>

On Mon, Nov 20, 2006 at 11:20:37AM -0800, p.lavarre at ieee.org wrote:
> > but the os module isn't very far away
> 
> I see Python defines some evals that apparently don't import os, such
> as:
> 
> int('0x100'[2:], 0x10)
> float('1.23e+4')
> binascii.unhexlify('4142')
> 
> Does Python also define an eval that doesn't import os for literal
> string args?
> 
> For example, suppose someone gives me source strings like
> repr('\a\r\n') when I need byte strings like '\a\r\n'.
> http://docs.python.org/ref/strings.html lists the escapes that need
> eval'ling, especially the comparatively heavy and Python-specific \N{}
> escape.


You can use string encoding and decoding to do what you want:
>>> a = r'hello\nthere'
>>> print a
hello\nthere
>>> print a.decode('string_escape')
hello
there

you can find other escape type encodings here:
http://docs.python.org/lib/standard-encodings.html

-Chris


From wilson1442 at bellsouth.net  Mon Nov  6 08:48:03 2006
From: wilson1442 at bellsouth.net (JW)
Date: Mon, 06 Nov 2006 08:48:03 -0500
Subject: Building C extensions
References: <mailman.1806.1162818237.11739.python-list@python.org>
Message-ID: <pan.2006.11.06.13.48.02.991773@bellsouth.net>

On Mon, 06 Nov 2006 14:03:54 +0100, Paolo Pantaleo wants to build a C
extension (presumably for Windows):

A few months ago, I suffered the same misfortune of needing to port a
pyrex-generated extension to Windows.  I'm sure it's easier than I made
it, but have a look at the thread:

	http://tinyurl.com/yb4bps

If you're developing under Windows (you poor fellow!), you may actually
have a slightly easier time than did I.

Jim Wilson
Gainesville, FL


From richard.charts at gmail.com  Wed Nov  8 07:49:16 2006
From: richard.charts at gmail.com (Richard Charts)
Date: 8 Nov 2006 04:49:16 -0800
Subject: Python deployment options.
In-Reply-To: <1162986129.233443.268730@h54g2000cwb.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162986129.233443.268730@h54g2000cwb.googlegroups.com>
Message-ID: <1162990156.204577.198720@h48g2000cwc.googlegroups.com>


king kikapu wrote:
> I see...So, if these are the only options, the only "safe" bet is to
> install the language on the machine (beeing Win, Linux or Mac)
> and execute the .py files, right ??
>
>

Well on a Win machine, probably.
Almost every Linux machine you come across will have (most likely a
fairly recent build of) python.  For Macs, I'm not so sure but it's
probably closer to Linux than Win.



From dale at riverhall.nospam.co.uk  Wed Nov  1 16:00:37 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Wed, 01 Nov 2006 21:00:37 +0000
Subject: Hooking file open
References: <QI62h.828$Hc2.442@newsfe11.phx>
Message-ID: <WV72h.85330$CA.46947@fe10.usenetserver.com>

You might consider trapping calls to file() too, which is an alias for
open().

Also, I think I'd do my logging before calling the real function. It depends
how you want to deal with exceptions. 

Farshid Lashkari wrote:

> Hi,
> 
> My goal is to detect all (or most) file dependencies of a script (i.e.
> modules, dlls, data files). Currently, after a script is finished
> executing I use sys.modules to determine all module dependencies, and I
> use win32process.EnumProcessModules to determine DLL dependencies. This
> works reasonably well, however I would still like to detect dependencies
> from regular file open calls.
> 
> I did a little test by modifying __builtins__.open to point to a custom
> function that forwards the call to the original open function and saves
> the filename to a list. It seemed to work for simple test cases. Here is
> the code:
> 
> def open_hook(*args,**kwargs):
>      r = open_real(*args,**kwargs)
>      saveFileName(args[0])
>      return r
> 
> open_real = __builtins__.open
> __builtins__.open = open_hook
> 
> Is this a safe approach? Is there a more efficient way of doing this? I
> realize that some dependencies will still fall through my checks,
> especially file opens from C extensions, which is fine. I just want to
> be able to detect the most common use cases. Any other suggestions are
> appreciated.
> 
> -Farshid

-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk



From tenax.raccoon at gmail.com  Mon Nov 13 13:30:47 2006
From: tenax.raccoon at gmail.com (Jason)
Date: 13 Nov 2006 10:30:47 -0800
Subject: Singleton Class Exception
References: <1163437486.036537.270190@h54g2000cwb.googlegroups.com>
	<1163440038.901759.112130@h54g2000cwb.googlegroups.com>
Message-ID: <1163442647.764741.227280@k70g2000cwa.googlegroups.com>

I threw together two different singleton classes.  They both ensure
that the initializers and destructors can be called at most once.  (The
ImmortalSingleton won't ever have its destructor called unless the
programmer manually forces things.)

I haven't extensively tested these things, so handle this code like a
rabid wildebeest.  Observe that Python may not call your destructors
when you expect.  IAnd again, you probably want the Borg pattern.

Still, this was an interesting exercise to do.

--- Code Starts ---
class MortalSingleton(object):
    """This class implements a 'mortal' singleton pattern.  Classes
derived
from this class cannot be directly instantiated or take arguments in
their
initializers.

The GetSingleton() class method returns a reference to a single
instance,
or creates a single instance as needed.

This class only keeps a weak reference to the single instance.  This
means
that, if all hard references are destroyed, the instance can be
destroyed
by Python (and the __del__ method *could* be called, depending on
implementation).  Thus, the single-ton is mortal.

This could be used as a mix-in class, assuming that the other classes
do not over-ride the __new__() method (which prevents willy-nilly
instantiation).

Note that if you need all instances to share state, you probably want
to use the Borg pattern.

Comments on this travesty are appreciated.  *grin*
"""
    def __new__(cls, *args, **keyargs):
        # Raise a run-time error preventing direct instantiation
        raise RuntimeError(
            'Do not instantiate %s directly.  Use the
%s.GetSingleton()'
            'class method.' % (cls.__name__, cls.__name__)
            )

    @classmethod
    def GetSingleton(cls):
        from weakref import ref

        retObject = getattr(cls, '_instance', lambda : None)()
        if retObject is None:
            # Create a new object with the given class
            retObject = object.__new__(cls)

            # The initializer must be manually called in this case
            retObject.__init__()
            cls._instance = ref(retObject)
        return retObject

class ImmortalSingleton(object):
    """This class implements a classic 'immortal' singleton pattern.
Classes derived from this class will allow only one instance to exist.

Since the class caches a hard reference to the single pattern, it
doesn't die unless the programmer gets rid of all references and
manually
deletes the cache reference.

Note that you probably want to use a variant of the Borg class rather
than
this."""
    def __new__(cls, *args, **keyargs):
        # Raise a run-time error preventing direct instantiation

        raise RuntimeError(
            'Do not instantiate %s directly.  Use the
%s.GetSingleton()'
            'class method.' % (cls.__name__, cls.__name__)
            )

    @classmethod
    def GetSingleton(cls):
        retObject = getattr(cls, '_instance', lambda : None)()
        if retObject is None:
            # Create a new object with the given class
            retObject = object.__new__(cls)

            # The initializer must be manually called in this case
            retObject.__init__()
            cls._instance = retObject
        return retObject



From dlenski at gmail.com  Wed Nov  8 13:38:18 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 8 Nov 2006 10:38:18 -0800
Subject: How to choose the right GUI toolkit ?
Message-ID: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>

Hi all,
I'm a recent, belated convert from Perl.  I work in a physics lab and
have been using Python to automate a lot of measurement equipment
lately.  It works fabulously for this purpose.  Recently I've wanted to
start writing GUIs for some of my programs, for data visualization and
to make the programs easier to use for some of my co-workers.

So far I've experimented with two Python GUI toolkits: Tkinter and
PyGTK.  I've had some issues with each:

* PyGTK - not very "pythonic", in my opinion.  Have to use get_ and
set_ methods rather than properties.  Have to write ugly things like
textview.insert(textview.get_end_iter(), ...) to append text to a text
buffer.  No useful doc strings, which makes experimenting with new
widgets in IPython a huge pain.  The toolkit feels very "heavyweight".
I don't want to write an XML file and an "action group" just to make a
piddly little menubar with 10 items.

I'm an avid Gnome fan, and love the professionalness and completeness
of GTK, but PyGTK seems frustratingly C-like compared to the
wonderfully designed high-level abstractions I've come to love in
Python!

* TkInter - Seems easy to learn, and better for quick "lightweight"
GUIs.  I wrote a complete working instrument GUI in less than a day of
figuring things out.  Not very Pythonic in terms of creating and
modifying widgets.  No factory functions to quickly create menu items.
My biggest problem with Tkinter is that it is very unreliable under
Cygwin: programs freeze and slow intermittently and the tkMessageDialog
stock dialog boxes show no visible text.

So, is there another toolkit I should be looking at?  Having something
that can run easily on Cygwin and native Windows is a priority so that
I can quickly move programs to new measurement computers.  I like GTK a
lot and Tk is growing on me too.. are there any higher-level "wrapper"
toolkits for GTK and Tk?

Thanks for any advice!

Dan Lenski
University of Maryland



From vatamane at gmail.com  Tue Nov  7 17:40:18 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 7 Nov 2006 14:40:18 -0800
Subject: Finding Nonzero Elements in a Sparse Matrix
References: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>
Message-ID: <1162939218.006857.100300@h54g2000cwb.googlegroups.com>

The function you might want is nonzero() or flatnonzero()

>>> from numpy import *

>>> a=array([ [1,2],[0,4] ])

>>> a
array([[1, 2],
           [0, 4]])

>>> flatnonzero(a)
array([0, 1, 3])

nonzero() will return the a sequence of index arrays of non zero
elements
flatnonzero()  returns the non-zero elements of the flattened version
of the array.

Cheers,
Nick Vatamaniuc



deLenn wrote:
> Hi,
>
> Does scipy have an equivalent to Matlab's 'find' function, to list the
> indices of all nonzero elements in a sparse matrix?
> 
> Cheers.



From seandavi at gmail.com  Wed Nov 29 10:09:45 2006
From: seandavi at gmail.com (SeanDavis12)
Date: 29 Nov 2006 07:09:45 -0800
Subject: Calling functions with dynamic arguments
Message-ID: <1164812985.794957.26530@l12g2000cwl.googlegroups.com>

I have a dictionary like:

{"a":1, "b":2}

and I want to call a function:

def func1(a=3,b=4):
    print a,b

so that I get a=1,b=2, how can I go about that?  

Thanks,
Sean



From grante at visi.com  Wed Nov  1 11:12:40 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 01 Nov 2006 16:12:40 -0000
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<1162394216.958479.297410@e64g2000cwd.googlegroups.com>
Message-ID: <12khhro1hph7q38@corp.supernews.com>

On 2006-11-01, Will McGugan <will at willmcgugan.com> wrote:

> If you are worried about running your 3d app on older
> machines, OpenGL will typically fall back to software
> rendering if the hardware isn't available.

That's true.  OpenGL (which will do SW rendering) will
certainly be available on most/all Linux machines (except for
headless or text-only servers).

> Although you would have to be running it on an ancient PC if
> that is an issue.

Not true.  None of my machines have hardware 3D acceleration.
One is only 9 months old, the others are 2-3 years old.
However, OpenGL's software rendering works fine and has
sufficient performance for most things short of 3D video games.

-- 
Grant Edwards                   grante             Yow!  Look into my eyes and
                                  at               try to forget that you have
                               visi.com            a Macy's charge card!


From onurb at xiludom.gro  Mon Nov  6 05:19:47 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 06 Nov 2006 11:19:47 +0100
Subject: Creating db front end or middleware.
In-Reply-To: <454a3347$0$12193$88260bb3@free.teranews.com>
References: <454a3347$0$12193$88260bb3@free.teranews.com>
Message-ID: <454f0c45$0$21382$426a74cc@news.free.fr>

tobiah wrote:
> Let's say I want to write a new tool to do
> something to, or report on people in a database.
> Each tool is going to have to have all sorts of
> routines that know about the relationship between
> the data.  The first thought is to write a library
> of routines that do things like, change_address(),
> or fire_employee() or whatever. 
> Whoops, now we've decided to move to python.  I
> have to write all of that again.
> 
> So I thought, shouldn't there be a cloud that sits
> in front of the database to which I can ask these
> services of?  Some process that awaits requests for
> information, or handles new incoming data.  Now new
> apps written in any language should be able to use a basic protocol in
> order to get the work done.
>
> The question then, is what the best way to do this is.

The first question then is: do you really need a middleware ? Most
RDBMSs are already full-blown server applications - with support for
authentification, permissions, triggers and stored procedures - that can
be accessed by client programs in almost any language.

Now if you effectively want/need a web service, it seems that the
canonical solutions are XMLRPC and SOAP. But if you already use a RDBMS,
 this web service should IMHO mostly be designed as an higher-level
interface to the RDBMS, not as a full-blown app managing domain/business
rules (which is the job of the RDBMS). IOW, it should be still possible
for applications to directly interact with the RDBMS.

> First I thought of using cherrypy to sit and listen to
> POST requests, but this would make passing complex structures
> extremely inconvenient.

There are XMLRPC packages for most languages, that knows how to do the
native data structure <-> XMLRPC translation. Python has both client and
server packages in the standard lib.

>  Then I thought about WSDL.
> Would this be the next logical step, or is this more for
> allowing different companies to communicate with each other
> when there needs to be a broadcast description of the interface?

As the name implies, W(eb) S(ervice) D(escription) L(anguage) is meant
to describe a given web service - and says nothing about implementation.

My 2 cents
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bearophileHUGS at lycos.com  Thu Nov 16 19:44:54 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Nov 2006 16:44:54 -0800
Subject: dict.reserve and other tricks
Message-ID: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>

I have started doing practice creating C extensions for CPython, so
here are two ideas I have had, possibly useless.

If you keep adding elements to a CPython dict/set, it periodically
rebuilds itself. So maybe dict.reserve(n) and a set.reserve(n) methods
may help, reserving enough (empty) memory for about n *distinct* keys
the programmer wants to add to the dict/set in a short future. I have
seen that the the C API of the dicts doesn't allow this, and I don't
know if this can be implemented modifying the dicts a bit. Do you think
this may be useful?

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

Sometime I need to remove some elements from dicts/sets. If I know a
rule that tells what elements have to be removed I can use code like
this:

import itertools

def filterset(predicate, inset):
  return set(itertools.ifilter(predicate, inset))

print filterset(lambda x: x & 1, set(range(10)))

Output:
set([1, 3, 9, 5, 7])

And a similar one to filter dicts that works with a predicate(key,
val).
Most of the times such functions are good enough, but sometimes the
dicts are big, so to reduce memory used I remove keys in place:

def filterdict(pred, indict):
  todel = [k for k,v in indict.iteritems() if not pred(k,v)]
  for key in todel:
    del indict[key]

d = dict.fromkeys(xrange(8), 0)
print d
filterdict(lambda k,v: k & 1, d)
print d

# Output:
# {0: 0, 1: 0, 2: 0, 3: 0, 4: 0, 5: 0, 6: 0, 7: 0}
# {1: 0, 3: 0, 5: 0, 7: 0}


But doing the same thing while iterating on the dict may be faster and
use even less memory.
This iteration&deletion capability is probably not safe enough to be
used inside Python programs, but a compiled C module with a function
that works like that filterdict (and deletes while iterating) may be
created, and its use is safe from Python programs.

The C++ STL API of maps allows to delete items while iterating on the
map (but probably it has to be done only when necessary, because it may
be a source for bugs):

typedef map<int, string> isMap;
typedef isMap::value_type isValType;
typedef isMap::iterator isMapItor;

void main() {
  isMap m;

  ... // items added to m

  for(isMapItor itr = m.begin(); itr != m.end();) {
    if(itr->second == "somestring")
      m.erase(itr++);
    else
      ++itr;
  }


The Python/C API, 7.4.1 Dictionary Objects, says that's not possible
with CPython dicts:

>The dictionary p should not be mutated during iteration. It is safe (since Python 2.1) to modify the values of the keys as you iterate over the dictionary, but only so long as the set of keys does not change.<

Do you think it may be useful to create to create such C filterdict
function that deletes while iterating? (To create such function it
probably has to bypass the CPython dict API).

Bye,
bearophile



From sven.dahlstrand at gmail.com  Thu Nov  9 18:52:39 2006
From: sven.dahlstrand at gmail.com (Sven)
Date: 9 Nov 2006 15:52:39 -0800
Subject: urlretrieve get file name
In-Reply-To: <mailman.2004.1163115558.11739.python-list@python.org>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
	<mailman.2004.1163115558.11739.python-list@python.org>
Message-ID: <1163116359.787681.31490@m73g2000cwd.googlegroups.com>

Hello Gabriel,

Thanks for your help, but I'm a guy with no luck. :-) I can't get the
file name from response header...

On Nov 10, 12:39 am, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Thursday 9/11/2006 19:11, Sven wrote:
>
> >I'm wrestling with the urlretrieve function in the urllib module. I
> >want to download a file from a web server and save it locally with the
> >same name. The problem is the URL - it's on the form
> >http://www.page.com/?download=12345. It doesn't reveal the file name.
> >Some hints to point me in the right direction are greatly appreciated.The file name *may* come in the Content-Disposition header (ex:
> Content-Disposition: attachment; filename="budget.xls")
> Use urlopen to obtain a file-like object; its info() method gives you
> those headers.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! -http://correo.yahoo.com.ar



From egbert.bouwman at hccnet.nl  Sun Nov 12 05:20:53 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Sun, 12 Nov 2006 11:20:53 +0100
Subject: Python as default Lexer in SciTE
Message-ID: <20061112102053.GA5304@hccnet.nl>

Is it possible to set Python as the default language in SciTE?
Not all my python scripts have the .py extension, 
only the to_be_imported ones. And I use SciTE only for Python.
e.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From paul at boddie.org.uk  Fri Nov 10 06:20:31 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Nov 2006 03:20:31 -0800
Subject: Searching for a module to generate GUI events
References: <eis853$92c$1@kohl.informatik.uni-bremen.de>
	<1162990029.409193.246830@b28g2000cwb.googlegroups.com>
	<ej13u2$ps2$1@kohl.informatik.uni-bremen.de>
Message-ID: <1163157631.425155.218460@h48g2000cwc.googlegroups.com>

Stephan Kuhagen wrote:
> utabintarbo wrote:
>
> > http://pywinauto.pbwiki.com/ for Win32
>
> Thanks for the hint, looks usable. But it seems, there's nothing for X11 and
> MacOSX. I didn't thought, that the problem would be so unusual...

Searching for "Python GUI testing" on Google gave this as the first
result:

http://www.redhat.com/magazine/020jun06/features/dogtail/

Comments on similar techniques for OS X can be found here:

http://www.oluyede.org/blog/2006/07/04/europython-day-1/

Other X11 projects which might support low-level interactions with
applications include the following:

http://python-xlib.sourceforge.net/
http://plwm.sourceforge.net/

Paul



From SSchukat at dspace.de  Wed Nov 15 11:42:36 2006
From: SSchukat at dspace.de (Stefan Schukat)
Date: Wed, 15 Nov 2006 17:42:36 +0100
Subject: PyWin32-winxptheme and py2exe
In-Reply-To: <d5ff27200611141342u4e91089bvbc49ecfa9fbd8857@mail.gmail.com>
Message-ID: <1B3F2E002D9AD04BBC1A27B370F29EB902318B@exchange2003.dspace.de>

You probably need to include the common Control Manifest to supprt
themes
see in the py2exe\samples\advanced directory for an example how to do
it.

	Stefan

> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org 
> [mailto:python-list-bounces+sschukat=dspace.de at python.org] On 
> Behalf Of Andrea Gavana
> Sent: Tuesday, November 14, 2006 10:43 PM
> To: python-list at python.org
> Subject: PyWin32-winxptheme and py2exe
> 
> Hi all,
> 
>    I am having some troubles mixing py2exe and winxptheme. 
> Basically, I am using wxPython 2.7.2.0 with Python 2.5, and 
> painting some window background using the UxTheme via 
> winxptheme. This is what I am doing:
> 
> hwnd = MyWindow.GetHandle()
> self.hTheme = winxptheme.OpenThemeData(hwnd, "Window")
> 
> winxptheme.DrawThemeBackground(self.hTheme, dc.GetHDC(), 5, 1,
>                               (rc.top, rc.left, rc.right, 
> rc.bottom), None)
> 
> 
> This works very well using python directly, but when I 
> generate and executable file with py2exe, I get this error 
> when executing that last
> line:
> 
> TypeError: an integer is required
> 
> This is because self.hTheme is *None*. It seems like 
> OpenThemeData can not be initialized in an executable, or at 
> least that I am not able to do it.
> Does anyone have a possible solution to this problem? I have 
> tried all the possibilities with py2exe, meaning bundle=1, 
> bundle=2, bundle=3, compressed=1, compressed=2, every 
> possible combination. But it doesn't work :-(
> 
> I attach my setup file, if it can be of any help.
> 
> Thank you very much for every pointer.
> 
> 
> --
> Andrea.
> 
> "Imagination Is The Only Weapon In The War Against Reality."
> http://xoomer.virgilio.it/infinity77/
> 


From bearophileHUGS at lycos.com  Fri Nov  3 03:29:23 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Nov 2006 00:29:23 -0800
Subject: Defaultdict and speed
Message-ID: <1162542563.386682.3090@b28g2000cwb.googlegroups.com>

This post sums some things I have written in another Python newsgroup.
More than 40% of the times I use defaultdict like this, to count
things:

>>> from collections import defaultdict as DD
>>> s = "abracadabra"
>>> d = DD(int)
>>> for c in s: d[c] += 1
...
>>> d
defaultdict(<type 'int'>, {'a': 5, 'r': 2, 'b': 2, 'c': 1, 'd': 1})

But I have seen that if keys are quite sparse, and int() becomes called
too much often, then code like this is faster:

>>> d = {}
>>> for c in s:
...   if c in d: d[c] += 1
...   else: d[c] = 1
...
>>> d
{'a': 5, 'r': 2, 'b': 2, 'c': 1, 'd': 1}

So to improve the speed for such special but common situation, the
defaultdict can manage the case with default_factory=int in a different
and faster way.

Bye,
bearophile



From kay.schluehr at gmx.net  Mon Nov 13 09:16:08 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 13 Nov 2006 06:16:08 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2116.1163286891.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
Message-ID: <1163427368.631537.94820@i42g2000cwa.googlegroups.com>

On 12 Nov., 00:14, Fredrik Lundh <fred... at pythonware.com> wrote:

> if you care about writing robust code, why not just use a for-loop,
> and the list extend method?
>
> </F>

Because generic solutions using HOFs increase abstraction and reduce()
the amount of code one has to write even when they are outcasted by
Guido?



From gagsl-py at yahoo.com.ar  Mon Nov 20 18:03:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 20:03:41 -0300
Subject: trying to create a dictionary in python, using variables
	as a value
In-Reply-To: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061120200213.03453550@yahoo.com.ar>

At Monday 20/11/2006 04:40, ronrsr wrote:

>but I keep getting syntax errors on this one -
>
>adict = {'zid': result[0][0], 'keywords': result{0][1],
>'quotations':result[0][2],'citations':result[0]{3]};
>zhtml.print_update_form(adict);

There *are* syntax errors, result{0] should be result[0], and 
result[0]{3] should be result[0][3]


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From steve at holdenweb.com  Tue Nov 14 04:25:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Nov 2006 09:25:22 +0000
Subject: Data structure for ordered sequence
In-Reply-To: <02d701c707c2$80d8f320$03000080@hendrik>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com><1163411468.025376.171210@k70g2000cwa.googlegroups.com>	<ej9fsq$i3l$1@sea.gmane.org>
	<02d701c707c2$80d8f320$03000080@hendrik>
Message-ID: <ejc204$3dn$1@sea.gmane.org>

Hendrik van Rooyen wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> 
> 
>> Eric_Dexter at msn.com wrote:
>>
>>  > unless this is homework because the pil people will not let
>>> you distribute pils.
>> I'm not sure I can parse this sentence fragment.  What do you mean?
> 
> oh come on! - you of all people should know that "pils" means mushroom...
> 
Cue yet another appearance of badgerbadgerbadger?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From Leo.Kislov at gmail.com  Mon Nov  6 15:29:08 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 6 Nov 2006 12:29:08 -0800
Subject: Erronous "unsupported locale setting" ?
References: <ein814$ml1$1@news.albasani.net>
	<1162820153.697175.18190@h54g2000cwb.googlegroups.com>
	<eing7n$2be$1@news.albasani.net>
Message-ID: <1162844948.123835.311430@f16g2000cwb.googlegroups.com>


robert wrote:
> Leo Kislov wrote:
> > robert wrote:
> >> Why can the default locale not be set by its true name? but only by '' ? :
> >
> > Probably it is just not implemented. But since locale names are system
> > specific (For example windows accepts 'ch' as Chinese in Taiwan, where
> > as IANA <http://www.iana.org/assignments/language-subtag-registry>
> > considers it Chamorro) setlocale should probably grow an additional
> > keyword parameter: setlocale(LC_ALL, iana='de-DE')
>
> that'd be another fat database to blow up the python core(s).
>
> I just wonder why locale.setlocale(locale.LC_ALL,"de_DE") doesn't accept the name, which
> >>> locale.getlocale() / getdefaultlocale()
> ('de_DE', 'cp1252')
> already deliver ?

It is documented that those functions return cross platform RFC 1766
language code. This code sometimes won't be compatible with OS specific
locale name. Cross platform code can useful if you want to create your
own locale database for example cross platform language packs.

Right now we have:

setlocale(category) -- get(it's not a typo) OS locale name
getlocale(category) -- get cross platform locale name
setlocale(category,'') -- enable default locale, return OS locale name
getdefaultlocale()  -- get cross platform locale name

I agree it's very confusing API, especially setlocale acting like
getter, but that's what we have. Improvement is welcome.

  -- Leo



From john106henry at hotmail.com  Tue Nov  7 17:42:28 2006
From: john106henry at hotmail.com (John Henry)
Date: 7 Nov 2006 14:42:28 -0800
Subject: Pyro stability
In-Reply-To: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
Message-ID: <1162939348.273142.6850@m73g2000cwd.googlegroups.com>

Being a non-professional programmer, I've managed to use Pyro to do
what I need to do with very minimal fuss.  In fact, I don't even
understand a lot of what's under the cover.  All I did was to mimic
what one of the sample program is doing and adapted it to my need.

So far I am very happy with Pyro.

And no, I don't need to use profanity to describe to you how amazing I
think Pyro is. :=)

writeson wrote:
> Hi all,
>
> At work I'm considering proposing a solution for our distributed
> processing system (a web based shopping cart that feeds an actual
> printing production line) based on Pyro. I've done some minor
> experiments with this and Pyro looks interesting and like a good
> implementation of what I want. I've got a couple of questions though:
>
> 1)  Has anyone had any experience with Pyro, and if so, have you had
> any stability, or memory use issues running Pyro servers or nameservers
> on the various participating computers? (We have a mixed environment of
> Linux and Windows, but will be heading to an all Linux (RedHat)
> environment soon.
>
> 2)  One of the guys I work with is more inclined to set up XMLRPC
> communication between the processes, and he is also leery of running
> daemon processes. His solution is to have essentially Python CGI code
> that responds to the various XMLRPC requests. Does anyone have any
> opinions on this? I know what mine are already. :)
>
> 3)  I've considered using CORBA, which is more powerful, and certainly
> faster, but it's complexity to set up compared to the rather simple
> work I'm trying to do seems prohibative. Does anyone have any thoughts
> on this?
> 
> Thanks in advance,
> Doug



From exarkun at divmod.com  Thu Nov  2 14:15:58 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Nov 2006 14:15:58 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <20061102191558.20948.700824158.divmod.quotient.10758@ohm>

On Thu, 02 Nov 2006 19:32:54 +0100, robert <no-spam at no-spam-no-spam.com> wrote:
>I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.

NumPy releases the GIL in quite a few places.  I haven't used scipy much,
but I would expect it does too.  Are you certain you need this complexity?

Jean-Paul


From skip at pobox.com  Sat Nov 11 19:09:59 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 11 Nov 2006 18:09:59 -0600
Subject: explicit self revisited
In-Reply-To: <1163288444.893136.42030@h54g2000cwb.googlegroups.com>
References: <ej5fuv$a4a$1@online.de> <ej5i3k$6l3$1@sea.gmane.org>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
Message-ID: <17750.26199.887883.166114@montanaro.dyndns.org>


    Doug> The explicit self is there simply because OOP was tacked onto
    Doug> python as an afterthought.

Got a reference to support that claim?

Skip


From fredrik at pythonware.com  Mon Nov 13 16:57:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 22:57:14 +0100
Subject: explicit self revisited
In-Reply-To: <ejacbp$akr$1@online.de>
References: <ej5fuv$a4a$1@online.de>	<1163407870.637052.32760@m73g2000cwd.googlegroups.com>
	<ejacbp$akr$1@online.de>
Message-ID: <ejapnq$n62$1@sea.gmane.org>

Peter Maas wrote:

> But at least I learned something: a heated debate isn't bound to become an
> endless thread if the OP abstains from answering idiot replies ;)

trolling is trolling even if you use smilies.  I'm sure you can find a 
way to actually *contribute* to Python if you really want to...

</F>



From iiu-bounces at iiu.taint.org  Sat Nov 11 14:47:26 2006
From: iiu-bounces at iiu.taint.org (iiu-bounces at iiu.taint.org)
Date: Sat, 11 Nov 2006 19:47:26 +0000
Subject: Your message to IIU awaits moderator approval
Message-ID: <mailman.12581.1163274446.834.iiu@iiu.taint.org>

Your mail to 'IIU' with the subject

    Returned mail: Data format error

Is being held until the list moderator can review it for approval.

The reason it is being held:

    ClamAV identified this message as a virus (Worm.Mydoom.M)

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://amgod.boxhost.net/cgi-bin/mailman/confirm/iiu/cee7316ed79723da5da0d101a94bae18848168ac



From steve at holdenweb.com  Sat Nov  4 09:23:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Nov 2006 14:23:32 +0000
Subject: WSDL?
In-Reply-To: <32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
References: <454ba334$0$12110$88260bb3@free.teranews.com>	<mailman.1762.1162647487.11739.python-list@python.org>	<pan.2006.11.04.13.50.50.713078@gmx.net>
	<32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
Message-ID: <eii7mt$mvm$1@sea.gmane.org>

Jorge Vargas wrote:
> On 11/4/06, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> 
>>In <mailman.1762.1162647487.11739.python-list at python.org>, Jorge Vargas
>>wrote:
>>
>>
>>>and please please don't go to corba we need to kill that.
>>
>>Have you real reasons or is this a religious thing?  As I see it Corba is
>>much better supported by Python libs than SOAP is.
>>
> 
> I see ZSI as a very good engine for SOAP as for xmlrpc it's "better"
> since you can interact with a browser and then you can even have json
> rpc.
> 
> but yes ur right is mostly because of religious reasons :)
> 
When SOAP can do everything that Corba can do, and as efficiently, it 
might stand a chance of displacing it. I see SOAP as essentially an ugly 
bloated NIH response of the Microsoft camp to an open specification that 
achieved all its goals in an elegant way. And all to allow inappropriate 
remote-method execution through port 80 to avoid the corporate firewall. 
Which ultimately just made firewalling port 80 that much more difficult.

Microsoft is a poor church, and very uncaring of its adherents. So take 
your religious reasons and leave Corba alone until SOAP is an effective 
competitor ;-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From steve at holdenweb.com  Wed Nov  1 22:57:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 03:57:45 +0000
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <1162434526.601605.315560@k70g2000cwa.googlegroups.com>
References: <eib0la$86i$1@newslocal.mitre.org>	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
	<1162434526.601605.315560@k70g2000cwa.googlegroups.com>
Message-ID: <eibq9k$ggg$1@sea.gmane.org>

John Machin wrote:
> Tom Plunket wrote:
> 
>>John Machin wrote:
>>
>>
>>>If you were to write 'c:\temp\book1.csv', it would blow up ... because
>>>\t -> tab and \b -> backspace. Get into the habit of *always* using raw
>>>strings r'C:\Temp\Book1.csv' for Windows file names (and re patterns).
>>>You could use double backslashing 'C:\\Temp\\Book1.csv' but it's
>>>uglier.
>>
>>...alternatively you can just use 'unix slashes', e.g.
>>'c:/temp/book1.csv', since those work just fine 'cause the Windows
>>APIs deal with them properly.
> 
> 
> Not all APIs do the right thing. If you fire up the cmd.exe shell and
> feed it slashes as path separators, it barfs. Example:
>     C:\junk>dir c:/junk/*.bar
>     Invalid switch - "junk".
> Hence the advice to use rawstrings with backslashes -- they work under
> all circumstances.
> 
The command shell is not an API.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From bearophileHUGS at lycos.com  Fri Nov 17 02:51:36 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Nov 2006 23:51:36 -0800
Subject: dict.reserve and other tricks
In-Reply-To: <1163742923.680092.264030@j44g2000cwa.googlegroups.com>
References: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>
	<1163742923.680092.264030@j44g2000cwa.googlegroups.com>
Message-ID: <1163749896.776736.201510@h48g2000cwc.googlegroups.com>

Thank you for the answers Terry Reedy and Klaas.

> Since you are writing extensions, you can create a built-in subclass of
> dict to experiment with.  I presume the 2.5 default dict should be a model.

That way it's doable, but I think it's of limited use too; I'd like to
remove elements from arbitrary (normal) dicts.


Klaas:

> Well, you can reduce the memory usage to virtually nothing by using a
> generator expression rather than list comprehension.

Are you sure? I don't think so. Can you show a little example?
As you know this can't work:

def filterdict(pred, indict):
  todel = (k for k,v in indict.iteritems() if not pred(k,v))
  for key in todel:
    del indict[key]

d = dict.fromkeys(xrange(8), 0)
print d
filterdict(lambda k,v: k & 1, d)
print d

(You can remove elements from the dict and put  them into a list, and
then put back the elements into the dict, this is probably the only way
I know of *theoretically* keeping the memory used about  the same with
Python. In practice the less memory consuming version may be the
filterdict I have shown).


> arbitrary python code can be executed by __hash__
> and deleting (DECREF) python objects.

I am starting to understand. I'll think more about this.

Thank you,
bye,
bearophile



From sjmachin at lexicon.net  Sat Nov 18 02:58:39 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 23:58:39 -0800
Subject: How can I speed this function up?
In-Reply-To: <3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>
Message-ID: <1163836719.802864.183650@b28g2000cwb.googlegroups.com>



On Nov 18, 2:05 pm, Chris <cfri... at bigpond.net.au> wrote:
> with this function I went from 8.04 s to 6.61 s.

And your code became less understandable.

> Now running up against
> my limited knowledge of python. Any chance of getting faster?

You have saved 1.4 *seconds*. What is the normal running time for this
app with 0.5M records? What is 1.4 seconds as a percentage of that?

Please consider that you are barking up the wrong gum tree. Competing
with a C app on speed is not something that experienced Python
programmers would take on lightly.

Talk to your colleague about some of these factors: time to write code,
robustness, clarity, ease of maintenance.

Cheers,
John



From markonlinux at internode.on.net  Tue Nov 14 04:55:43 2006
From: markonlinux at internode.on.net (Mark Woodward)
Date: Tue, 14 Nov 2006 20:55:43 +1100
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.14.09.55.42.130942@internode.on.net>

On Mon, 13 Nov 2006 09:11:13 -0800, lennart wrote:

> Hi,
> 
> I'm planning to learn a language for 'client' software. Until now, i
> 'speak' only some web based languages, like php. As a kid i programmed
> in Basic (CP/M, good old days :'-) ) Now i want to start to learn a
> (for me) new computer language.
> 
> I like Python. Its free, easy to learn and some favorite programs of my
> are written in Python / can understand Python (like OpenOffice) etc.
> 
> But I'm not a full-time programmer. I know, that I've only time &
> possibility to learn one (= 1) language good. So i ask myself is python
> the language I'm looking for?
...

I've been hesitant to write this in the past but seems like a good time.

I'm at the same stage, but (and this is NOT a troll) I'm tossing up
between Python and Ruby. I know this has been discussed numerous times but
I'd like to come at it from a different angle. 

I've been 'playing' with both languages and to be honest it's a case of 6
of one, half a dozen of the other. If I'm using python I 'think' python
and if I'm using Ruby I 'think' ruby (if that makes sense). Ie I don't
find I'm more productive in one over the other to any great extent (pretty
unproductive in both ATM to be honest ;-)) .

In the foreseeable future I suspect I'll stick with one and just use it
for things I personally will use/need. But (and here's where I finally get
to a question) I use Linux, I love the whole idea of open source and
contributing in some way. So if I ever get to the stage where I can give
something back is one preferred over the other? I would have thought no
but I read on the Ubuntu site somewhere that they prefer contributions
written in Python/ pyGTK?? Is this just a 'preference' or because python
is installed by default? (whereas Ruby isn't)? Is it just Ubuntu or Linux
distros in general?

I hope you can see where I'm coming from here. I don't want to start a
Python/Ruby flame war. That's not the question. The question is "is one
preferred over the other when contributing software and is this just a
particular distros preference"?


cheers,


-- 
Mark


From kib2 at free.fr  Fri Nov 24 15:42:50 2006
From: kib2 at free.fr (tool69)
Date: Fri, 24 Nov 2006 21:42:50 +0100
Subject: Pydev configuration
In-Reply-To: <1164389878.833569.60710@l39g2000cwd.googlegroups.com>
References: <1164389878.833569.60710@l39g2000cwd.googlegroups.com>
Message-ID: <456757c2$0$7958$426a74cc@news.free.fr>

S?bastien Boisg?rault a ?crit :
> Hi,
> 
> Did anyone managed to change the code font family/size
> in Pydev (Python Editor Plugin for Eclipse) ? I found how
> to change the color mapping (Windows/Preference/Pydev)
> but did not found the font setting.
> 
> Cheers,
> 
> SB
> 
Salut S?bastien,

Preferences/General/Appearence/Colors&Fonts/ in the right menu choose 
Basic/Text Font

6TooL9


From WeikEngOff at aol.com  Wed Nov 15 12:21:30 2006
From: WeikEngOff at aol.com (Udo)
Date: 15 Nov 2006 09:21:30 -0800
Subject: Editor w. Code Completion for COM-Libs (ActivePython 2.3)
Message-ID: <1163611290.132982.317010@k70g2000cwa.googlegroups.com>

Hello,

I'm looking for an Python-editor which supports code completion for
imported COM-Libs. I'm using ActivePython 2.3.
Any hints?

Thanks and kind regards
Udo



From __peter__ at web.de  Wed Nov  8 16:08:47 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Nov 2006 22:08:47 +0100
Subject: is this the right way to do subclasses?
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45523133$0$14421$c3e8da3@news.astraweb.com>
Message-ID: <eith0g$t7e$02$1@news.t-online.com>

John Salerno wrote:

> Peter Otten wrote:
> 
>> One way to avoid the repetition:
>> 
>> class Character(object):
>>     def __init__(self, name, strength, dexterity, intelligence):
>>         self.name = name
>>         self.health = 10
>>         self.strength = strength
>>         self.dexterity = dexterity
>>         self.intelligence = intelligence
>>         self.fix_attributes()
>> 
>> class Fighter(Character):
>>     def fix_attributes(self):
>>         self.health += 2
>>         self.strength += 1
>> 
>> You may need a no-op implementation of fix_attributes() in the Character
>> class.

> But how does this take care of the initialization of the stats? I won't
> be able to use Fighter to create a character without doing everything in
> Character, right?

Try it: Fighter(...) will implicitly call Character.__init__(...).

Peter


From bj_666 at gmx.net  Thu Nov  9 03:15:11 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 09 Nov 2006 09:15:11 +0100
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
	<eitahh$nov$1@panix3.panix.com>
	<mailman.1928.1163016034.11739.python-list@python.org>
	<87slgt1vmh.fsf@gmail.com> <4552723b$0$323$e4fe514c@news.xs4all.nl>
	<mailman.1951.1163037537.11739.python-list@python.org>
Message-ID: <pan.2006.11.09.08.15.10.172134@gmx.net>

In <mailman.1951.1163037537.11739.python-list at python.org>, skip wrote:

> 
>     Irmen> So there. Finally back on the original subject ;-)
> 
> And without satisfying Godwin's Law.  Pretty good.

Which was very hard with all those language nazis out there.  Ooops?

SCNR,
	Marc 'BlackJack' Rintsch


From Leo.Kislov at gmail.com  Tue Nov 28 06:26:04 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 03:26:04 -0800
Subject: Modifying every alternate element of a sequence
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <1164713164.043283.161370@l39g2000cwd.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
>
> input = [1,2,3,4,5,6]
> wanted = [1,-2,3,-4,5,-6]
>
> I can implement it like this:
>
> input = range(3,12)
> wanted = []
> for (i,v) in enumerate(input):
>     if i%2 == 0:
>         wanted.append(v)
>     else:
>         wanted.append(-v)
>
> But is there any other better way to do this.

Use slices:

input[1::2] = [-item for item in input[1::2]]

If you don't want to do it in-place, just make a copy:

wanted = input[:]
wanted[1::2] = [-item for item in wanted[1::2]]

  -- Leo



From ask at me  Wed Nov  1 23:55:14 2006
From: ask at me (alf)
Date: Wed, 01 Nov 2006 22:55:14 -0600
Subject: Python images processing -recap
Message-ID: <SYOdnf4nBKSu59TYnZ2dnUVZ_qSdnZ2d@comcast.com>

Hi,

I try to summarize what is available in python for graphical images 
processing. So far I found:

-PythonMagic
-PIL
-SDL_image


Are all supported, which is most mature, in which I could perform for 
instance 'Ken Burns effect' or light filling operations. Is there 
anything else?


-- 
alf


From skip at pobox.com  Fri Nov 10 23:41:53 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 10 Nov 2006 22:41:53 -0600
Subject: mushrooms are animals? [was Re: Py3K idea: why not drop the colon?]
In-Reply-To: <pan.2006.11.11.00.48.57.493691@REMOVE.THIS.cybersource.com.au>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<mailman.2044.1163176635.11739.python-list@python.org>
	<pan.2006.11.11.00.48.57.493691@REMOVE.THIS.cybersource.com.au>
Message-ID: <17749.21649.286856.219920@montanaro.dyndns.org>


    Steven> The world seems to be flat, the sun appears to rotate around the
    Steven> Earth, and mushrooms look like they are more closely related to
    Steven> plants than to animals, but none of these things are actually
    Steven> the case.

Where can I read about mushrooms as animals?

Skip


From Leo.Kislov at gmail.com  Mon Nov 13 06:23:35 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 13 Nov 2006 03:23:35 -0800
Subject: str.title question after '
References: <slrnelgi3p.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <1163417015.047332.197000@m73g2000cwd.googlegroups.com>


Antoon Pardon wrote:
> I have a text in ascii. I use the ' for an apostroph. The problem is
> this gives problems with the title method.  I don't want letters
> after a ' to be uppercased. Here are some examples:
>
>    argument       result          expected
>
>   't smidje       'T Smidje       't Smidje
>   na'ama          Na'Ama          Na'ama
>   al pi tnu'at    Al Pi Tnu'At    Al Pi Tnu'at
>
>
> Is there an easy way to get what I want?

def title_words(s):
    words = re.split('(\s+)', s)
    return ''.join(word[0:1].upper()+word[1:] for word in words)

>
> Should the current behaviour condidered a bug?

I believe it follows definition of \w from re module.

> My would be inclined to answer yes, but that may be
> because this behaviour would be wrong in Dutch. I'm
> not so sure about english.

The problem is more complicated. First of all, why title() should be
limited to human languages? What about programming languages? Is
"bar.bar.spam" three tokens or one in a foo programming language? There
are some problems with human languages too: how are you going to
process "out-of-the-box" and "italian-american"?

  -- Leo



From bblais at bryant.edu  Fri Nov  3 12:29:20 2006
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 03 Nov 2006 12:29:20 -0500
Subject: setting up wxPython on a Mac
In-Reply-To: <454B6DB4.4040107@kevin-walzer.com>
References: <mailman.1719.1162571053.11739.python-list@python.org>
	<454B6DB4.4040107@kevin-walzer.com>
Message-ID: <454B7C70.7050402@bryant.edu>

Kevin Walzer wrote:
> Brian Blais wrote:
>> Hello,
>>
>> I have a wxPython program that I would like to give to a friend of mine
>> who has a Mac.  Is there a resource out there that can tell me what
>> steps I need to follow to do this? 
>>
> Install Python from the Python website--a Python 2.5 installer is
> available for the Mac.
> 
> Install wxPython from the wxPython website--an installer for the latest
> version of wxPython for the Mac is also available.
> 
> That should do it.
> 

sounds easy.  If I need the numpy/scipy/matplotlib combo, is it that straightforward? 
  On windows it is, on Linux is definitely is not.

thanks,

		bb


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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From jameshcunningham at gmail.com  Wed Nov 15 23:04:56 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Wed, 15 Nov 2006 23:04:56 -0500
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
Message-ID: <2006111523045616807-jameshcunningham@gmailcom>

On 2006-11-15 20:59:26 -0500, "walterbyrd" <walterbyrd at iname.com> said:

> 
> Bruno Desthuilliers wrote:
>> walterbyrd a ?crit :
> 
>> You mean there are web hosting companies that are still using Apache
>> 1.3.x ?
>> 
> 
> Practically all web-hosters still use Apache 1.3.x. Certainly all of
> the lower priced hosters.

Not true. Dreamhost, at least, uses Apache 2.
> 
>> C'mon, let's be serious. I just ordered a dedibox - a small dedicated
>> web server - for my personal use. It's only 30 euros a month, you know...
> 
> What if I only need 25mb of space? I can that with a PHP hoster for $10
> a year. That is about 1/36th the price that you posting about.
> 
> Maybe you don't mind paying 30 euros a month, but a lot others do.

Of course, you can't get $10 a year plans on Dreamhost. But with deals 
you can get it down to about that low, at least for the first year. I 
suppose I'm lucky enough not to miss $8 a month otherwise.

Best,
James



From phil at riverbankcomputing.co.uk  Sun Nov  5 17:23:06 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 5 Nov 2006 22:23:06 +0000
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1162749608.733730.321970@k70g2000cwa.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
Message-ID: <200611052223.06388.phil@riverbankcomputing.co.uk>

On Sunday 05 November 2006 6:00 pm, vj wrote:
> > Riverbank Computing is pleased to announce the release of PyQt v4.1
> > available from http://www.riverbankcomputing.co.uk/pyqt/.
>
> What's the best way to learn pyqt. Do the examples from the book GUI
> Programming with Python: QT Edition still work? Is the material from
> the book mostly valid or have things changed quite a bit?
>
> http://www.commandprompt.com/community/pyqt/

The basics haven't changed, but Qt v4 covers many more things than Qt v2. I 
think it's still perfectly valid for the basics - but API differences 
probably mean the examples need some changes.

Phil


From 2Shreekar at gmail.com  Thu Nov  2 10:26:52 2006
From: 2Shreekar at gmail.com (Shreekar Patel)
Date: 2 Nov 2006 07:26:52 -0800
Subject: is mod_python borked?
In-Reply-To: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <1162481212.495984.101510@m73g2000cwd.googlegroups.com>


walterbyrd wrote:
> I am considering python, instead of php, for web-application
> development. I often see mod_python.criticisized as being borked,
> broken, or just plain sucking.
>
> Any truth to any of that?

No, I've been using mod_python for a long time, and I haven't run in to
any problems. In fact I use python server pages for my web development,
which is much faster than python cgi scripts.

http://vsbabu.org/webdev/pydev/python10.html

Once you set up your server for psp pages, it's so easy. Very similar
to php pages. Just give it a go and you'll like it.

http://www.modpython.org/ for setting up server with mod_python.



From Mythmon at gmail.com  Sat Nov 11 15:28:05 2006
From: Mythmon at gmail.com (Mythmon at gmail.com)
Date: 11 Nov 2006 12:28:05 -0800
Subject: Why does this code crash python?
In-Reply-To: <4556246a$0$326$e4fe514c@news.xs4all.nl>
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<4556246a$0$326$e4fe514c@news.xs4all.nl>
Message-ID: <1163276885.609160.163090@h54g2000cwb.googlegroups.com>

On Nov 11, 11:28 am, Irmen de Jong <irmen.NOS... at xs4all.nl> wrote:
> You're creating a console object "c" and use it in both threads.
>
> Try creating the console object for each thread by itself,
> i.e. remove the global "c = Console.getconsole()" and replace
> it by a getconsole() inside each thread class.
>
> I don't have the Console module so I don't know if it fixes things
> for you, but give it a try :)

Well, I tried that, and it did something. It made it so the space bar
switched the clock once, but not a second time. And it still crashed,
but not always at the same time, sometimes it would do it the second
time I hit the space bar, sometimes before I hit it the first time, but
always when i did something that would generate a Console event (moving
the mouse or something). So, I thought it had something to do with
Console not working well with threads, so I took it completely out of
threads and had just the event checking loop run by itself, and it
still crashed. So apparently I am using the Console events wrong. I am
going to try and find some examples online on how to watch for events
with it, but if worse comes to worse I can try and use keyboard hooks,
I've looked at those before, and they might work better.

--Mythmon



From cjames at callone.net  Tue Nov 21 14:42:55 2006
From: cjames at callone.net (c james)
Date: Tue, 21 Nov 2006 13:42:55 -0600
Subject: Why is class decorator on method loosing self?
In-Reply-To: <1164135863.270437.80340@b28g2000cwb.googlegroups.com>
References: <mailman.535.1164117922.32031.python-list@python.org>
	<1164135863.270437.80340@b28g2000cwb.googlegroups.com>
Message-ID: <ejvkrv$4q5$1@sea.gmane.org>

If I am reading this correctly you, are rebinding min_max in 
CustomizeMeta using '__customize' as the attribute to identify the 
member to work on.

Thank you.  I think you are right, this is probably the best way to 
implement what I intend for caching resource intensive processing.

to George Sakkis wrote:
> 
> I don't think you can make it work without resorting to metaclass
> magic. At the point of decoration min_max is still a function, not a
> method, because class Foo has not been created yet. Here's a way to do
> it with a custom metaclass; whether you really want to do it is a
> different matter:
> 

> George
> 



From gagsl-py at yahoo.com.ar  Thu Nov 16 20:57:50 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 22:57:50 -0300
Subject: cPickle problems
In-Reply-To: <1163724509.572724.199720@f16g2000cwb.googlegroups.com>
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061116225442.03fcf748@yahoo.com.ar>

At Thursday 16/11/2006 21:48, Jeff  Poole wrote:

>   File "/usr/lib/python2.4/pickle.py", line 313, in save
>     rv = reduce(self.proto)
>   File "/usr/lib/python2.4/copy_reg.py", line 83, in _reduce_ex
>     dict = getstate()
>TypeError: 'str' object is not callable

Someway, self.__getstate__ is a string, not a method...
Since it fails inside a python module, you could print some debug 
information to see what happens, like repr(self), type(self), repr(getstate)...



-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Wed Nov 29 13:11:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 19:11:35 +0100
Subject: Surprise with special floating point values
In-Reply-To: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>
References: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>
Message-ID: <ekkign$4pr$2@sea.gmane.org>

prouleau001 at gmail.com wrote:

> While trying to use simplejson under Python 2.4.3 I have been
> investigating the handling of special floating point values 

note that JSON doesn't support non-numeric floating point values, as can 
be seen by the "number" syntax description on this page:

     http://www.json.org/

(and as I pointed out in another thread on this topic, Python relies on 
the C library for serialization of floats, so non-numeric floating point 
values aren't portable between Python versions either).

</F>



From horpner at yahoo.com  Fri Nov 10 11:49:18 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 17:49:18 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
Message-ID: <slrnel9be9.1dk.horpner@FIAD06.norwich.edu>

On 2006-11-10, Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
> Neil Cerutti wrote:
>> On 2006-11-09, Bjoern Schliessmann
>
>>> if color == red or blue or green:
>>>     return 'primary'
>>>
>>>:)
>  
>> The Inform 6* programming language supports the serial 'or' (and
>> 'and') and looks just like that.
>
> Python also supports it.
>
>> The disadvantage is that the usual binary logical operators
>> must exist and are spelled differently. (It uses C's '||' and
>> '&&'.)
>
> Do they have to be spelled differently? In Python, they don't
> have to.

That kind of answers your question. ;-)

That is cool. I was unaware of the feature; until just now I
thought Inform was had innovated the syntax!

-- 
Neil Cerutti


From szport at gmail.com  Tue Nov 21 16:21:52 2006
From: szport at gmail.com (szport at gmail.com)
Date: 21 Nov 2006 13:21:52 -0800
Subject: Note about getattr and '.'
Message-ID: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>

There is an interesting skewness in python:

class A(object): pass

>>> a=A()
>>> setattr(a, '$foo', 17)
>>> getattr(a, '$foo')
17

But I can't write 
>>> a.'$foo'



From shane at hathawaymix.org  Tue Nov  7 16:36:05 2006
From: shane at hathawaymix.org (Shane Hathaway)
Date: Tue, 07 Nov 2006 14:36:05 -0700
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <4550FC45.6010500@hathawaymix.org>

robert wrote:
> I'd like to use multiple CPU cores for selected time consuming Python
> computations (incl. numpy/scipy) in a frictionless manner.
> 
> Interprocess communication is tedious and out of question, so I
> thought about simply using a more Python interpreter instances
> (Py_NewInterpreter) with extra GIL in the same process. I expect to
> be able to directly push around Python Object-Trees between the 2 (or
> more) interpreters by doing some careful locking.
> 
> Any hope to come through? If possible, what are the main dangers? Is
> there an example / guideline around for that task? - using ctypes or
> so.
> 
> Or is there even a ready made Python module which makes it easy to
> setup and deal with extra Interpreter instances? If not, would it be
> an idea to create such thing in the Python std libs to make Python
> multi-processor-ready. I guess Python will always have a GIL -
> otherwise it would loose lots of comfort in threaded programming

I'd like to mention mod_python, which creates multiple interpreters
inside Apache.  It does this transparently and works well.  There is no
apparent lock contention between the interpreters, because no Python
objects are shared.

Also, I'd like to make the observation that it is not always necessary
to share the entire interpreter (ala threads) in order to take advantage
of multiple cores.  I think Python only needs a nice way to share a
relatively small set of objects using shared memory.  POSH goes in that
direction, but I don't think it's simple enough yet.

http://modpython.org/
http://poshmodule.sourceforge.net/

Shane



From mike.klaas at gmail.com  Fri Nov  3 23:46:33 2006
From: mike.klaas at gmail.com (Klaas)
Date: 3 Nov 2006 20:46:33 -0800
Subject: Javascript is turning into Python?!
In-Reply-To: <7xr6wkt6a3.fsf@ruckus.brouhaha.com>
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
	<1162596267.518634.164170@h54g2000cwb.googlegroups.com>
	<7xr6wkt6a3.fsf@ruckus.brouhaha.com>
Message-ID: <1162615592.955299.54130@k70g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "Carl Banks" <pavlovevidence at gmail.com> writes:
> > > http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7
> > Maybe in exchange, Python can borrow the let statement.
>
> Maybe the with statement could be extended to allow binding more than
> one variable.
>     with x as f(), y as g():
>        blah (x, y)

from contextlib import nested

with nested(f(), g()) as (x, y):
   ....

-Mike



From sjmachin at lexicon.net  Thu Nov  9 06:31:02 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 03:31:02 -0800
Subject: substring search without using built in utils
In-Reply-To: <45530805$0$10013$426a74cc@news.free.fr>
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
	<mailman.1954.1163038984.11739.python-list@python.org>
	<45530805$0$10013$426a74cc@news.free.fr>
Message-ID: <1163071862.056378.13870@f16g2000cwb.googlegroups.com>


Bruno Desthuilliers wrote:
> Gabriel Genellina wrote:
> > At Wednesday 8/11/2006 22:29, zeal elite wrote:
> >
> >> I am looking for substring search python program without using the
> >> built in funtions like find, or 'in'.
> >
> > The only reasonable usage for such a constraint would be a school
> > assignment so: don't cheat and do your homework!
> >
>
> OTHO, looking for existing solutions to a same or similar problem and
> studying them is usually considerer good practice in real-life
> programming jobs !-)
>

Looking at an existing solution for substring search that was coded in
Python, instead of using the built-in functionality would IMHO be
considered extremely bad practice in a real-life programming job.



From matthew at agrip.org.uk  Sun Nov 26 13:26:05 2006
From: matthew at agrip.org.uk (Matthew Tylee Atkinson)
Date: Sun, 26 Nov 2006 18:26:05 +0000 (UTC)
Subject: Persistent Threads & Synchronisation
References: <ekbtta$753$1@news.freedom2surf.net>
	<pan.2006.11.26.12.24.20.464034@gmx.net>
Message-ID: <ekcm7t$m84$1@news.freedom2surf.net>

On Sun, 26 Nov 2006 13:24:21 +0100, Marc 'BlackJack' Rintsch wrote:
> There seems to be a misunderstanding of threads.  You don't call functions
> in a thread from the main program.  If you call a function from the main
> thread then the function is executed in the main thread.  That's true for
> any call on `Thread` objects except for `start()` which really starts
> executing the `run()` method in a separate thread.

Aha, thanks very much for this!

> The easiest way for safe communication with threads is a `Queue` like
> the one in the `Queue` module.  If you want a download thread that
> is running alongside the main program all the time then write a while loop
> that gets "commands" via a queue.  Something like:

Brilliant!  I will try it out soon.

Thanks very much for your help; it has really explained a lot!

best regards,


-- 
Matthew Tylee Atkinson <matthew at agrip.org.uk>


From pavlovevidence at gmail.com  Thu Nov 23 21:11:49 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 23 Nov 2006 18:11:49 -0800
Subject: What's going on here?
In-Reply-To: <hJj9h.45491$Xt5.14428@fe81.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
	<hJj9h.45491$Xt5.14428@fe81.usenetserver.com>
Message-ID: <1164334309.703616.45790@45g2000cws.googlegroups.com>

Dale Strickland-Clark wrote:
> Thanks for the answers. I am informed but I don't feel enlightened.
>
> It does strike me as odd that an apparently empty subclass should add extra
> function to the base class.
>
> Not at all obvious.

Remember that a class definition is syntax sugar for a direct call to
type:

type(name,bases,clsdict)

This constructs and returns the class.  It's free to add behaviors even
if the clsdict is empty, and that's exactly what it does in this case.
type considers the absence of __slots__ in clsdict to be a request for
an instance dict, and so it adds one.  (Types defined in C aren't
created that way, however.  I believe C-defined types request an
instance dict by reserving space for it in the object structure and
setting tp_dictoffset to indicate its offset.)

This is not obvious, but it's really the only reasonable way.  You
can't have the base class of all objects creating dicts for its
instances--you wouldn't want every int object to have it's own dict.
And you can't have Python class instances not have a dict by default.


Carl Banks



From news at p2b.datatailors.com  Thu Nov  9 06:31:11 2006
From: news at p2b.datatailors.com (Peter van Kampen)
Date: 09 Nov 2006 11:31:11 GMT
Subject: Is there a commas-in-between idiom?
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
	<slrnel39n2.9hk.news@datatailors.xs4all.nl>
	<eitee4$dut$1@news.albasani.net>
Message-ID: <slrnel648i.vcg.news@datatailors.xs4all.nl>

On 2006-11-08, Georg Brandl <g.brandl-nospam at gmx.net> wrote:
> Peter van Kampen schrieb:
>> On 2006-11-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>>> I've collected a bunch of list pydioms and other notes here:
>>>
>>>     http://effbot.org/zone/python-list.htm
>> 
>> """
>> A = B = [] # both names will point to the same list
>> """
>> 
>> I've been bitten by this once or twice in the past, but I have always
>> wondered what it was useful for? Can anybody enlighten me?
>
> Do you never have a situation where you want to assign the same value
> to two variables?

In the sense that I might want two empty lists or maybe 2 ints that
are initialised as 0 (zero). That's what I (incorrectly) thought A = B
= [] did.

> Or are you objecting to the fact that both names point to the same
> object?

I'm not objecting to anything, merely wondering when I could/should
use this idiom. There's a nice example in another response (self.items
= items = [])

> It couldn't be otherwise. Consider:
>
> X = []
> A = B = X
>
> What should this do? Copy "X" and assign one copy to A, one to B?

Ah yes, I see the error in my ways...I skipped the A = B part too
lightly.

Thanks,

PterK


-- 
Peter van Kampen
pterk -- at -- datatailors.com


From john106henry at hotmail.com  Thu Nov 30 14:16:24 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 11:16:24 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <mailman.892.1164913677.32031.python-list@python.org>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<mailman.892.1164913677.32031.python-list@python.org>
Message-ID: <1164914184.104754.266670@j72g2000cwa.googlegroups.com>

Well, pardoon me.

Next.

Thomas Ploch wrote:
> John Henry schrieb:
> > If I have a list of say, 10 elements and I need to slice it into
> > irregular size list, I would have to create a bunch of temporary
> > variables and then regroup them afterwords, like:
> >
> > # Just for illustration. Alist can be any existing 10 element list
> > a_list=("",)*10
> > (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> > alist=(a,)
> > blist=(b,)
> > clist=(c1,c2,c3)
> > dlist=(d2,d3,d4,d5)
> >
> > That obviously work but do I *really* have to do that?
> >
> > BTW: I know you can do:
> > alist=a_list[0]
> > blist=a_list[1]
> > clist=a_list[2:5]
> > dlist=a_list[5:]
> >
> > but I don't see that it's any better.
> >
> > Can I say something to the effect of:
> >
> > (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work
> >
> > ??
> >
> > I am asking this because I have a section of code that contains *lots*
> > of things like this.  It makes the code very unreadable.
> >
> > Thanks,
> >
>
> Nothing in your code actually __is__ a list. they are all tuples...
> A list is:
> aList = [a,b,c1,c2,c3,d1,d2,d3,d4,d5]
> 
> Thomas



From mail at microcorp.co.za  Sun Nov  5 03:12:01 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 5 Nov 2006 10:12:01 +0200
Subject: Programming Language that is Spreadsheet/Table Based
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com><k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net><1162626260.236167.157920@m73g2000cwd.googlegroups.com><CAY2h.21661$TV3.1374@newssvr21.news.prodigy.com><1162638585.016404.20270@m7g2000cwm.googlegroups.com>
	<MK_2h.1463$r12.237@newssvr12.news.prodigy.com>
Message-ID: <012501c700b2$12ef4d80$03000080@hendrik>

"James Stroud" <jstroud at mbi.ucla.edu> wrote:

> Gerard Flanagan wrote:

8<----------------------------------------------

> Thank you, this is very good stuff to think about.
>
> James

 I can't really add to the above train of thought...

And I don't know if this will help - but if you want to think, here is a skewed,
simple view:

If I were to try and do something like this, I would start by defining a spread
sheet like dict to keep everything in, using (column,row) tuples as keys, and
build on top of that.

This would give you the ability to keep *anything* in a cell, and the database
like structures you are thinking of would live on top of this underlying access
structure, with the (column,row) being a direct *pointer* to an element in one
fast step.

I would then also use other dicts to describe what is kept in the "columns" -
something simple like:

header_dict = {0:['name of person','Name','Enter your name'],1:['age of person
since birth','Age','Enter your birthday'], ... }

where the first item in the list is a help string, the second a column header
for printing, the third the string to use as prompt for a GUI, etc... - you
could even keep and enforce type if you wanted to - must be int, must be date,
column width for printing, validation data and rules, - whatever.

In a sense this is a sort of inverted way of looking at a file - instead of
having an underlying dict with (column, row) keys, you could alternatively have
"loose" column dicts only to keep the data in ( note that I have been writing
(column, row) consistently, instead of the more conventional (row,column).) -
this would make adding or deleting columns almost trivial.

You *could* also have references to Python functions or class methods living
alongside the data in the cells, and then things can get hairy - for an age
entry, for instance, the cell can look like:

Data[(column,row)] =                       # (or Age[row] in the alternative
approach)

 [(1947,01,24),self.BirthdayChecker,self.PresentChooser,self.LetterWriter, ...]

where the first entry, the tuple,  represents the data (could have been a list
or dict, of course ) and the rest are methods or functions to use, in this
particular instance.   You could instead have these function references in the
age column's header dict entry, for those of them that have applicability across
all rows of the column, just like the idea of type enforcement or validation
above.

For a kind of row, or row type, you need then simply keep a list of column
numbers that are required for this "record", with a different list defining a
different record type - Gold members need these column entries filled in, while
Silver members need only those... simple, but then you need a record type
column...

This sort of thing organises the stuff, but the code to use it becomes a bit
impenetrable, as you have to write a kind of crawling process to access the
structure to do what is required, but it is all "table driven" and can be very
flexible.  Its not a weekend project though, and when you are finished its a
kind of super relational database...

HTH

- Hendrik



From fabiofz at gmail.com  Wed Nov  1 07:00:57 2006
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Wed, 1 Nov 2006 09:00:57 -0300
Subject: Pydev 1.2.5 Released
Message-ID: <cfb578b20611010400t637a4c7cvae57ceaaeafe908c@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.2.5 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Minor bug on mark occurrences fixed
* The quick outline now will go to the 'sole item' in the tree even if it is
not selected (and OK is pressed)


Release Highlights in Pydev:
----------------------------------------------

*  Early release of the Pydev package explorer View. Features already
implemented:
      o Common resource actions (delete, copy, rename, team...)
      o Shows the Source folder with a different icon
      o Linking mode enabled
      o Shows the outline for a python file
      o Opening an item in the outline opens the correct place in the
correspondent file
      o NOTE: The package explorer is still in a beta state
* Debugger bug-fix: Crash when debugging wxPython programs should not happen
anymore
* When opening a file, the encoding is considered (and not only when saving
it)
* Patches from Gergely Kis:
      o Option for having a 'default interpreter' in the combo for selecting
which interpreter to use for a run
      o Saving the things related to the pydev project in a .pydevproject
file to be commited
* Patch from Gregory Golberg:
      o Ctrl+Shift+D when a variable is selected in debug mode shows the
variable value



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
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From aahz at pythoncraft.com  Wed Nov  8 14:18:09 2006
From: aahz at pythoncraft.com (Aahz)
Date: 8 Nov 2006 11:18:09 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
Message-ID: <eitahh$nov$1@panix3.panix.com>

In article <mailman.1907.1163003856.11739.python-list at python.org>,
 <skip at pobox.com> wrote:
>
>    Beliavsky> English is a rich language, and there are better ways of
>    Beliavsky> doing that.
>
>    aahz> Oh, gimme a fucking break.
>
>I'm with Beliavsky on this one.  I can't see any particular reason to curse
>in a forum such as c.l.py.  It just coarsens the discussion with no obvious
>positive benefit as far as I can see.

Actually, I do agree that profanity "should" be avoided on c.l.py; what
I disagree with rather vociferously is having language police like
Beliavsky.  I consider Beliavsky's offense far worse than the original
post.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From vinjvinj at gmail.com  Sat Nov  4 20:42:09 2006
From: vinjvinj at gmail.com (vj)
Date: 4 Nov 2006 17:42:09 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <2nRXg.108$1n3.2866@news.tufts.edu>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
Message-ID: <1162690929.501897.258360@b28g2000cwb.googlegroups.com>

I've tried both and find WingIDE much faster than Komodo and the layout
is very well thought out. I love the way you can collapse all the
differnet panes with a few keystrokes. I also like their autocomplete
functionality.

Wing is developed by a small company, focussed on python development,
while komodo supports all the major scripting languages. 

VJ



From st911 at rock.com  Thu Nov 30 11:46:04 2006
From: st911 at rock.com (st911 at rock.com)
Date: 30 Nov 2006 08:46:04 -0800
Subject: *** ARE The FBI Bastards are making movies of YOUR PRIVATE MARITAL
	SEXUAL MOMENTS ***
Message-ID: <1164905164.126750.305180@j72g2000cwa.googlegroups.com>

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

He and his family later sued the U.S. government for damages.

"We lived in 1984," Mayfield told reporters Wednesday. "I'm talking
about the George Orwell, frightening brave new world in which Big
Brother is constantly watching you." (Watch Mayfield discuss the case
Video)

"I, myself, have dark memories of stifling paranoia, of being
monitored, followed, watched, tracked," he said, choking back emotion.

"I've been surveilled, followed, targeted primarily because I've been
an outspoken critic of this administration and doing my job to defend
others who can't defend themselves, to give them their day in court,
and mostly for being a Muslim."

The government refused, he said, to tell him where they put their
cameras and surveillance devices, leaving his family wondering if their
private conversations and intimate moments were on display.

"The days and weeks and months following my arrest were some of the
hardest and darkest that myself and my family have ever had to endure,"
he said.

"And all because of this government's ill-conceived war on terror. ...
What I really want is for this not to happen to anyone else."

Wednesday's settlement includes not only a $2 million payment and an
apology, but also an agreement by the government to destroy
communications intercepts conducted by the FBI against Mayfield's home
and office during the investigation.

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

A Justice Department statement released Wednesday said Mayfield was not
targeted because of his Muslim faith and that the FBI had taken steps
to improve its fingerprint identification process "to ensure that what
happened to Mr. Mayfield does not happen again."

"Mr. Mayfield and his family felt it was in their best interest to get
on with their lives," said Mayfield's attorney, Elden Rosenthal.

"No amount of money can compensate Mr. Mayfield for being held as a
prisoner and being told he faced the death penalty [for the Madrid
bombings]."

Mayfield said his suit was not about money.

"It's about regaining our civil rights, our freedom and most important,
our privacy," he said.

He and his attorneys said the settlement will allow him to continue the
portion of his lawsuit challenging the constitutionality of the Patriot
Act.

Mayfield contends that his home was searched under provisions of the
Patriot Act.

====================================================================

Criminal, Rogue and RACIST elements have penetrated all the branches of
USA and world governments. We know that on 911 FBI bastards ran all
over in the neighborhood of Pentagon trying to  confiscate EVIDENCE of
the 911 crime that no Boeing Passenger Airliner hit Pentagon. They have
stil not released the evidence. 911 was inside job.

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, Mossad, PENTAGON AND THE WHITE HOUSE. Dont
forget that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, PENTAGON AND THE WHITE HOUSE. Dont forget
that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

THE ONLY ONLY REASON FBI DID THIS IS BECAUSE THEIR CRIME WAS
UNCONCEALABLE. UNDER THE PRETEXT OF SELF-DEFENSE, MANY OF THESE AGENCY
OFFICIALS HAVE COVERED THEIR CRIMES AND DESTROYED EVIDENCE OF THEIR
CRIMES.

FBI COVERED UP A CHILD PEDOPHILIA RING THAT WAS LINED TO REAGAN AND
HERBERT WALKER BUSH. There is a VIDEO on google of the investigation.



From cito at online.de  Wed Nov 22 14:59:05 2006
From: cito at online.de (Christoph Zwerschke)
Date: Wed, 22 Nov 2006 20:59:05 +0100
Subject: Protecting against SQL injection
In-Reply-To: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
References: <Xns986662F736DD5toreriknpolarno@129.242.5.222>
Message-ID: <ek2a65$8up$1@online.de>

Tor Erik Soenvisen wrote:
> How safe is the following code against SQL injection:
> 
>         # Get user privilege
>         digest = sha.new(pw).hexdigest()
>         # Protect against SQL injection by escaping quotes
>         uname = uname.replace("'", "''")
>         sql = 'SELECT privilege FROM staff WHERE ' + \
>               'username=\'%s\' AND password=\'%s\'' % (uname, digest)
>         res = self.oraDB.query(sql)

This is definitely *not* safe.

For instance, set uname = r"\' or 1=1 --"

You must replace the backslash with a double backslash as well.
But as already suggested, you should better use query parameters.

-- Christoph


From deets at nospam.web.de  Mon Nov 20 09:30:33 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 20 Nov 2006 15:30:33 +0100
Subject: to ask an container instance to suicide
References: <1164015742.696913.283050@m73g2000cwd.googlegroups.com>
Message-ID: <4sdsg9Fup048U1@mid.uni-berlin.de>

jm.suresh at no.spam.gmail.com wrote:

> Hi,
>  I have containers to hold geometrical objects. The members in these
> containers can again be containers them self. Now, In the program I
> would be moving objects from one container to another. In this process,
> If the number of members in one of the containers becomes just one, I
> want to delete that container and have only its only member in place of
> it in the parent container.
>  I have implemented setting and getting the container members using
> property().
> 
> Right now, I am planning to do this this way:
>  Maintain a reference to parent container in each container.
>  When the condition is detected, do self.parent.deleteObject(self) .
> 
> def deleteObject(self,memberId):
>    index = self._members.index(memberId)
>    self._members[index] = memberId._members[0]
>    del memberId
> 
> Will this work. Or is there any other simple way to do this?

I wouldn't implement it this way. I'd rather have a reducer in place - it is
benefitial to have a way of visiting you tree of objects. Then you could
employ a reducing-scheme that will replace childnodes of a node with their
single child as optimization. 

Diez


From anderslanglands at gmail.com  Wed Nov 22 07:37:06 2006
From: anderslanglands at gmail.com (anders)
Date: 22 Nov 2006 04:37:06 -0800
Subject: PyQt app in seperate thread
Message-ID: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>

I am writing a plugin for a piece of software in python, and I want to
start up a PyQt GUI in the plugin, without stalling the main thread
while the gui is running (later i will want to pass messages between
the main thread and the gui thread).

I'm new to pyqt, so I'm probably doing something very silly, but for
the moment I'm just trying to get the first pyqt tutorial example
running in a seperate thread:

----8<--------

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore

class MyThread( QtCore.QThread ):
	def __init__( self ):
		QtCore.QThread.__init__( self )

	def run( self ):
		app = QtGui.QApplication( sys.argv )
		hello = QtGui.QPushButton( 'Hello world!' )
		hello.resize( 500, 500 )
		hello.show()
		app.exec_()
		QtCore.QThread.terminate(  )



mt = MyThread()
mt.start()
print 'Main thread continuing...'
mt.wait()
print 'GUI thread finished.'

----8<--------

The app starts up (with a warning WARNING: QApplication was not created
in the main() thread. ). I get a window, but no button, and clicking on
the close button does nothing and I have to force the program to quit.

There's got to be a way to get this working, right? Can anyone help me
along the right path?

Cheers,

Anders



From meyer at acm.org  Fri Nov 24 12:10:15 2006
From: meyer at acm.org (Andre Meyer)
Date: Fri, 24 Nov 2006 18:10:15 +0100
Subject: synching with os.walk()
In-Reply-To: <1164384728.336225.59840@l39g2000cwd.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164384728.336225.59840@l39g2000cwd.googlegroups.com>
Message-ID: <7008329d0611240910j616dc7bey733eb141d5e86e47@mail.gmail.com>

Cool, this seems to work.

thanks!


On 24 Nov 2006 08:12:08 -0800, 120psi at gmail.com <120psi at gmail.com> wrote:
>
> > os.walk() is a nice generator for performing actions on all files in a
> > directory and subdirectories. However, how can one use os.walk() for
> walking
> > through two hierarchies at once? I want to synchronise two directories
> (just
> > backup for now), but cannot see how I can traverse a second one. I do
> this
> > now with os.listdir() recursively, which works fine, but I am afraid
> that
> > recursion can become inefficient for large hierarchies.
>
> I've run into wanting to work with parallel directory structures
> before, and what I generally do is something like:
>
> for root, dirs, files in os.walk( dir1 ):
>   dir2_root = dir2 + root[len(dir1):]
>   for f in files:
>     dir1_path = os.path.join( root, f )
>     dir2_path = os.path.join( dir2_root, f )
>
> Does this work for your needs?
> -- Nils
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Dr. Andre P. Meyer                        http://python.openspace.nl/meyer
TNO Defence, Security and Safety          http://www.tno.nl/
Delft Cooperation on Intelligent Systems  http://www.decis.nl/

Ah, this is obviously some strange usage of the word 'safe' that I wasn't
previously aware of. - Douglas Adams
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From john106henry at hotmail.com  Mon Nov  6 15:22:54 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Nov 2006 12:22:54 -0800
Subject: adding python scripting to my application
In-Reply-To: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
References: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
Message-ID: <1162844574.218733.142700@h48g2000cwc.googlegroups.com>

Take a look at:

http://www.swig.org/

Julian wrote:
> Hi, first of all, I have to say I am new to Python. I have been working
> with a finite element analysis program written in c++. now, I am trying
> to 'rebuild' this code (possibly a full re-write) with scripting
> capability. I did some reading on the web, and found that there are two
> ways to do this : extending and embedding. and I still haven't figured
> out what I should be using. I guess the first thing is to figure out
> what I am to do with the scripting capability - at the very least, I
> would like to run parametric analyses - run multiple analysis models by
> changing certain parameters using for loops.
> i found that the commercial fea package - abaqus uses python as well -
> I don't know whether they embedded or extended ? is there any way to
> find out?
> another fea application called OOF2
> (http://www.ctcms.nist.gov/oof/oof2/#features) says "OOF2 is completely
> scriptable in Python". and I don't really understand what that means...
> maybe I haven't grasped the full potential of what python scripting
> could do for an fea program.
>
> can you tell me how to decide what path I should take - embed or extend
> ? or maybe some one could point me to some document/webpage that talks
> about this.
>
> thanks a lot,
> Julian.
>
> PS, my fea program uses its own script to read the analysis model
> information using the c++ iostream and our own parsing functions - but
> I don't have to stick to those function when I am writing the new code.



From researchbase at gmail.com  Thu Nov 16 09:48:18 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 16 Nov 2006 20:18:18 +0530
Subject: Secure Python
In-Reply-To: <1163646179.11586.60.camel@pc7.dolda2000.com>
References: <1163646179.11586.60.camel@pc7.dolda2000.com>
Message-ID: <f81479dd0611160648m37c72719v239d3aacd0615a4@mail.gmail.com>

after reading all the mails on this thread, I have the following observations.
I am relatively new to python at its development side but very old as
far as using python is concerned.
firstly, talking about gnu/linux there is no question about security.
python, if at all it is non-secure wont harm a linux machine much any ways.
secondly with OS like windows, things will be non-secure, no matter what you do.
and it will be un stable and un secure no matter what language you use.
how far then is python secured or non-secured in its absolute sence?
I need to use python for a very mission critical project.  may be I
will also use zope.
so I will like to know how far I can trust python for security in its
absolute (platform independent ) sence?
I mean running unwanted code at run-time etc.
thanks.
Krishnakant.


From kbk at shore.net  Thu Nov 30 21:55:20 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 30 Nov 2006 21:55:20 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200612010255.kB12tK59022240@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  407 open ( +1) /  3484 closed ( +5) /  3891 total ( +6)
Bugs    :  936 open ( +5) /  6363 closed (+14) /  7299 total (+19)
RFE     :  246 open ( +1) /   244 closed ( +0) /   490 total ( +1)

New / Reopened Patches
______________________

sys.id() and sys.intern()  (2006-11-23)
       http://python.org/sf/1601678  opened by  Georg Brandl

clarify comparison return values  (2006-11-24)
       http://python.org/sf/1602128  opened by  Jim Jewett

non-framework built python fails to define environ properly  (2006-11-23)
       http://python.org/sf/1602133  opened by  paul

Suggest a textlist() method for ElementTree  (2006-11-24)
       http://python.org/sf/1602189  opened by  Raymond Hettinger

subprocess: error redirecting i/o from non-console process   (2006-11-27)
       http://python.org/sf/1603907  opened by  Oren Tirosh

Performance boost for array repeat  (2006-11-28)
CLOSED http://python.org/sf/1605020  opened by  Mike Klaas

Make Imap Error more helpful  (2006-11-29)
       http://python.org/sf/1605192  opened by  Thomas Guettler

vendor-packages directory.  (2005-09-22)
       http://python.org/sf/1298835  reopened by  loewis

Patches Closed
______________

__bool__ instead of __nonzero__  (2006-11-21)
       http://python.org/sf/1600346  closed by  jackdied

SRE engine do not release the GIL  (2005-11-25)
       http://python.org/sf/1366311  closed by  eric_noyau

Implement lazy read for sockets  (2003-12-04)
       http://python.org/sf/853963  closed by  loewis

Disable POSIX for certain/older NetBSD versions  (2003-12-05)
       http://python.org/sf/854796  closed by  loewis

Performance boost for array repeat  (2006-11-28)
       http://python.org/sf/1605020  closed by  mklaas

New / Reopened Bugs
___________________

using python extension(wxPython) in c   (2006-11-23)
CLOSED http://python.org/sf/1601607  opened by  jolleydtan

getopt Documentation improvement  (2006-11-23)
CLOSED http://python.org/sf/1601630  opened by  Thomas Guettler

Incorrect docs for bisect_left  (2006-11-24)
       http://python.org/sf/1602378  opened by  Daniel Eloff

itemconfigure returns incorrect text property of text items  (2006-11-25)
       http://python.org/sf/1602742  opened by  Wojciech Mula

wave module forgets to close file on exception  (2006-11-26)
       http://python.org/sf/1603150  opened by  amerinese

wave module forgets to close file on exception  (2006-11-26)
CLOSED http://python.org/sf/1603246  opened by  amerinese

pstats module (profiler) doens't support unicode paths  (2006-11-26)
CLOSED http://python.org/sf/1603321  opened by  Adal Chiriliuc

def foo(((x))) segfault  (2006-11-26)
CLOSED http://python.org/sf/1603332  opened by  Tony Lownds

f=open fails with TypeError  (2006-11-26)
CLOSED http://python.org/sf/1603336  opened by  Gibholio

f=open fails with TypeError  (2006-11-26)
CLOSED http://python.org/sf/1603412  opened by  Gibholio

subprocess.py (py2.5) wrongly claims py2.2 compatibility  (2006-11-27)
       http://python.org/sf/1603424  opened by  Tim Wegener

Python socket library confused by IPV6 notation in /etc/host  (2006-11-27)
       http://python.org/sf/1603527  opened by  Eric S. Raymond

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

grammatical error in Python Library Reference::Tkinter  (2006-11-27)
CLOSED http://python.org/sf/1603789  opened by  Gabriel M. Elder

subprocess.Popen closes fds for sys.stdout or sys.stderr  (2006-11-28)
       http://python.org/sf/1604851  opened by  Nishkar Grover

_CRT_SECURE_NO_DEPRECATE macro redefinition with VC++ 8  (2006-11-28)
CLOSED http://python.org/sf/1604862  opened by  William Fulton

logging %(module)s reporting wrong modules  (2006-11-29)
       http://python.org/sf/1605110  opened by  Mad-Marty

csv module broken for unicode  (2006-11-30)
       http://python.org/sf/1606092  opened by  JettLogic

readline on popen3 file returns empty string before end  (2006-11-30)
       http://python.org/sf/1606233  opened by  Bill Wallace

Bugs Closed
___________

utf_8_sig decode fails with buffer input  (2006-11-23)
       http://python.org/sf/1601501  closed by  doerwalter

using python extension(wxPython) in c   (2006-11-23)
       http://python.org/sf/1601607  closed by  loewis

getopt Documentation improvement  (2006-11-23)
       http://python.org/sf/1601630  closed by  gbrandl

ctypes Structure allows recursive definition  (2006-11-17)
       http://python.org/sf/1598620  closed by  theller

2.4 & 2.5 can't create win installer on linux  (2006-10-04)
       http://python.org/sf/1570417  closed by  loewis

wave module forgets to close file on exception  (2006-11-26)
       http://python.org/sf/1603246  closed by  gbrandl

pstats module (profiler) doens't support unicode paths  (2006-11-26)
       http://python.org/sf/1603321  closed by  gbrandl

def foo(((x))) segfault  (2006-11-26)
       http://python.org/sf/1603332  closed by  gbrandl

f=open fails with TypeError  (2006-11-26)
       http://python.org/sf/1603336  closed by  gbrandl

f=open fails with TypeError  (2006-11-26)
       http://python.org/sf/1603412  closed by  nnorwitz

grammatical error in Python Library Reference::Tkinter  (2006-11-27)
       http://python.org/sf/1603789  closed by  gbrandl

read() in windows stops on chr(26)  (2006-11-13)
       http://python.org/sf/1595822  closed by  sf-robot

_ctypes built with GCC on AIX 5.3 fails with ld ffi error  (2006-09-23)
       http://python.org/sf/1563807  closed by  theller

_CRT_SECURE_NO_DEPRECATE macro redefinition with VC++ 8  (2006-11-28)
       http://python.org/sf/1604862  closed by  loewis

"make install" for Python 2.4.4 not working properly  (2006-10-19)
       http://python.org/sf/1580563  closed by  sf-robot



From icetortoise at gmail.com  Thu Nov 23 05:02:18 2006
From: icetortoise at gmail.com (Andy)
Date: 23 Nov 2006 02:02:18 -0800
Subject: How do I find possible matches using regular expression?
In-Reply-To: <yDd9h.2553$Gk5.410@tornado.texas.rr.com>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
	<yDd9h.2553$Gk5.410@tornado.texas.rr.com>
Message-ID: <1164276138.816724.253400@l12g2000cwl.googlegroups.com>

The problem is the input will be much more complex than the example, it
could be something like "30 minutes later" where any string starting
with a number is a possible match.


Paul McGuire ???

> "Andy" <icetortoise at gmail.com> wrote in message
> news:1164272307.978986.158810 at l39g2000cwd.googlegroups.com...
> > Hi there,
> >
> > I'm trying to do some predicting work over user input, here's my
> > question:
> >
> > for pattern r'match me', the string 'no' will definitely fail to match,
> > but 'ma' still has a chance if user keep on inputting characters after
> > 'ma', so how do I mark 'ma' as a possible match string?
> >
> > Thanks a lot,
> >
> > Andy
> >
> Maybe .startsWith might be more useful than re.match, since you are
> predicting user input based on characters that have been typed so far.
> 
> -- Paul



From steve at REMOVE.THIS.cybersource.com.au  Mon Nov  6 22:49:17 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 07 Nov 2006 14:49:17 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <pan.2006.11.07.03.49.16.855898@REMOVE.THIS.cybersource.com.au>

On Mon, 06 Nov 2006 16:57:58 -0500, John Salerno wrote:

> Let's say I'm making a game and I have this base class:
> 
> class Character(object):
> 
>      def __init__(self, name, stats):
>          self.name = name
>          self.strength = stats[0]
>          self.dexterity = stats[1]
>          self.intelligence = stats[2]
>          self.luck = stats[3]
> 
> Is this a good way to assign the values to the different attributes? 
> Should 'stats' be a list/tuple (like this), or should I do *stats instead?


Whenever possible, think about writing self-documenting code:

def __init__(self, name, strength, dexterity, intelligence, luck):
    self.name = name
    self.strength = strength
    # etc.

seems perfectly acceptable to me (if a tad verbose, but that isn't a big
deal -- write once, never touch again).

The problem with function signatures like these:

def __init__(self, name, stats):
def __init__(self, name, *stats):

is that the format of stats is left unstated. Is it (luck, strength,
intelligence) or (strength, intelligence, luck) or (wisdom, charisma,
power, health) or something else? You shouldn't need to read the code
line by line to find out, and relying on documentation risks having the
code and docs get out of sync.

If you expect the stats to be passed as a single tuple, you can still make
it explicit: just wrap the field names within brackets.

def __init__(self, name, (strength, dexterity, intelligence, luck) ):

> I'm trying to think ahead to when I might want to add new attributes, 

If this is likely, you could do something like this:

def __init__(self, name, **stats):
    self.name = name
    self.__dict__.update(stats)

Adding extra attributes is fine, since they will just be ignored, but what
if the caller adds an attribute "itnelligence" (instead of intelligence)?
You're now writing lots of code like this:

def save_intelligence(self, threshold):
    """Roll a saving throw against intelligence"""
    try:
        return roll(self.intelligence) > threshold
    except AttributeError:
        # character has no intelligence, so always fails
        return False

Yes, you can make that easier with currying, decorators etc. but why not
make sure your characters have the required attributes in the first place?

One way of doing that would be to add default values for the required
attributes in the class, and let instances inherit those defaults from the
class.


> and I want to make sure this doesn't get crazy with individual 
> parameters instead of just the one list.

If you've got that many character attributes, I'm guessing that your game
will be a tad hard to play :-)

If you have more than a half-dozen or ten character attributes, you could
consider encapsulating them in some way. E.g. group-related attributes and
pass them as tuples:

power => (constitution, health, anaerobic_strength, aerobic_strength)
intelligence => (IQ, wisdom, dexterity, book_learning, street_wisdom)
charisma => (beauty, chutzpah, attractiveness, persuasiveness)
senses => (vision, hearing, smell, telepathy, empathy, feeling, spacial)
others => (luck, determination, laziness, attention_to_detail)

You could then roll against power, say, by giving a set of weights:

character.roll('power', (0.0, 0.0, 0.9, 0.1))

gives anaerobic strength a weighting of 90% and aerobic 10%.

But again, I think that if your roll-playing game needs to have such
fine-grained attributes, I think it will be too complex to be fun.



> Or maybe there's some way to loop through two lists (the stats and the 
> attributes) and assign them that way? I was thinking of a nested for 
> statement but that didn't seem to work.

def __init__(self, stats):
    names = ['strength', 'dexterity', 'intelligence', 'luck']
    for name, stat in zip(names, stats):
        setattr(self, name, stat)



-- 
Steven.



From python.list at tim.thechases.com  Thu Nov  9 06:21:31 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 09 Nov 2006 05:21:31 -0600
Subject: Sorted list - how to change it
In-Reply-To: <eiutv1$jvh$1@ork-un.noris.net>
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
	<eiutv1$jvh$1@ork-un.noris.net>
Message-ID: <45530F3B.3020800@tim.thechases.com>

>> I have a sorted list for example [1,2,3,4,5] and I would like to change
>> it in a random way
>> e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
>> ordered.
>> What is the best/easiest
>>  way how to do it?
>
> use random.shuffel:
> 
>>>> import random
>>>> x = [1,2,3,4,5]
>>>> random.shuffle(x)
>>>> x
> [1, 4, 2, 3, 5]


Just a caveat from past experience...while the OP was talking 
about lists, for future reference random.shuffle() chokes on 
strings (and possibly tuples).  It requires the ability to edit 
the target/parameter in place...a functionality that strings 
don't provide.

Thus, for a "word jumble" program I was playing with, you can't 
just do

	word = 'hello'
	random.shuffle(word)

but rather you have to list'ify the word, shuffle it, then pack 
it back together:

	word = 'hello'
	a = list(word)
	random.shuffle(a)
	word = ''.join(a)

I remember seeing discussion on the list at one point of a 
MutableString class, which might be successfully passed to 
random.shuffle() without hiccuping.

-tkc





From stephen.ayotte at gmail.com  Mon Nov 20 09:46:24 2006
From: stephen.ayotte at gmail.com (stephen.ayotte at gmail.com)
Date: 20 Nov 2006 06:46:24 -0800
Subject: os x make install dies when compiling zipfile.py on 2.5 and 2.4.4
In-Reply-To: <1162848039.627681.22980@m7g2000cwm.googlegroups.com>
References: <1162848039.627681.22980@m7g2000cwm.googlegroups.com>
Message-ID: <1164033984.637054.21800@h48g2000cwc.googlegroups.com>

I've experienced the exact same with 2.4.4.

uname -a on the machine I built it on (SunOS 5.7, binaries should be
forwards-compatible with 5.7-5.10):
SunOS hostname-here 5.7 Generic_106541-19 sun4u sparc SUNW,Ultra-4

And the machine on which it was being installed (because it has write
access to the NFS mount I want it installed on):
SunOS hostname-here 5.10 Generic_118822-25 sun4u sparc
SUNW,Sun-Fire-V210

I only *just* hit this and haven't dug further for a solution. If
anyone knows about this please respond, otherwise I'll post any
progress I make.

On Nov 6, 4:20 pm, "metaperl" <metap... at gmail.com> wrote:
> I've tried both Python 2.4.4 and Python 2.5. I'm trying to build from
> source and install under a local directory Swarm since OpenSwarm
> requires builds of Postgres and Python under it's control.
>
> Ok, so I did
>
> ./configure --prefix=/Users/tbrannon/Documents/Python/Swarm/Python-2.5
>
> but during make install I get this:
>
> Compiling
> /Users/tbrannon/Documents/Python/Swarm/Python-2.5/lib/python2.5/xmlrpclib.py
> ...
> Compiling
> /Users/tbrannon/Documents/Python/Swarm/Python-2.5/lib/python2.5/zipfile.py
> ...
> make: *** [libinstall] Error 1
> <!-- ~/Downloads/Python-2.5 tbrannon -->
>
> and the same thing happens for Python 2.4.4 leaving me without a
> platform-depedent install directory in my build.. any ideas?



From robert.kern at gmail.com  Thu Nov  2 13:02:34 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 02 Nov 2006 10:02:34 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162489638.013433.102180@h48g2000cwc.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
Message-ID: <eidbrp$i8n$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> mattf:
>> 3) -There's a problem with development under Windows.
> 
> It's possibile to compile Python with MinGW, and to create extensions
> with it. So some site can host a single zip file that contains both
> MinGW and Python compiled with it, all ready and set. A person not much
> expert can then create compiled small extensions in a short time
> without too much complexities. (Or maybe the D language can be packed
> into that, instead of MinGW, to do similar things. D can be a good
> language used with Python) But then probably PIL, scipy, etc have to be
> compiled again for such alternative official or semi-official Python
> distribution.

With a few caveats, mingw will simply work with the standard 2.4 (and presumably 
2.5) interpreter. We distribute mingw set up to do this with our "Enthought 
Edition" Python distribution.

   http://code.enthought.com/enthon/

-- 
Robert Kern

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



From horpner at yahoo.com  Thu Nov  9 08:37:40 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Nov 2006 14:37:40 +0100
Subject: Problem getting a file pathname with tkFileDialog
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
	<n2t924-frs.ln1@eskimo.tundraware.com>
	<1163060986.314142.22060@k70g2000cwa.googlegroups.com>
Message-ID: <slrnel6br1.1ns.horpner@FIAD06.norwich.edu>

On 2006-11-09, jmdeschamps at gmail.com <jmdeschamps at gmail.com> wrote:
> you could also use encode("iso-8859-1") to nterpret just the
> printed name such as: print myfilename.encode("iso-8859-1")
>
> and by the way if you wanted the file NAME you could have used
> openfilename() instead of openfile()    ;-)

The encoding of the filenames in the file system is available
from sys.getfilesystemencoding(). That might turn out to be
useful when interpreting them.

-- 
Neil Cerutti
Strangely, in slow motion replay, the ball seemed to hang in the air
for even longer. --David Acfield


From robert.kern at gmail.com  Tue Nov  7 18:40:59 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 07 Nov 2006 17:40:59 -0600
Subject: Finding Nonzero Elements in a Sparse Matrix
In-Reply-To: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>
References: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>
Message-ID: <eir5ij$23u$1@sea.gmane.org>

deLenn wrote:
> Hi,
> 
> Does scipy have an equivalent to Matlab's 'find' function, to list the
> indices of all nonzero elements in a sparse matrix?

You will want to ask scipy questions on the scipy list.

  http://www.scipy.org/Mailing_Lists

There is no explicit interface on sparse matrix objects to expose the indices of
the nonzero elements. A different implementation would have to be written for
each type of sparse matrix format. However, if one can spare the memory, one can
convert to the coordinate list format and read the row and column indices from
that object.


In [1]: from scipy.sparse import lil_matrix

In [2]: A = lil_matrix((3,3))

In [3]: A[1,2] = 10

In [4]: A[2,0] = -10

In [5]: Acoo = A.tocoo()

In [6]: Acoo.row
Out[6]: array([2, 1])

In [7]: Acoo.col
Out[7]: array([0, 2])


-- 
Robert Kern

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



From Roberto.Bonvallet at cern.ch  Tue Nov 14 10:06:27 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Tue, 14 Nov 2006 15:06:27 +0000 (UTC)
Subject: sqlite3 views, if not exists clause
References: <4559c572$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<mailman.139.1163512420.32031.python-list@python.org>
Message-ID: <ejcm1j$e60$2@cernne03.cern.ch>

Fredrik Lundh wrote:
> "Josh" wrote:
> 
>> THIS DOES NOT WORK, but it should!
> 
> Python 2.5 was released on September 19th, 2006, and support for CREATE
> VIEW IF NOT EXISTS was added to sqlite on October 9th, 2006:

So?  "from __future__ import ..." should have supported this!  <:o)

-- 
Roberto Bonvallet


From spe.stani.be at gmail.com  Wed Nov 29 18:03:13 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 29 Nov 2006 15:03:13 -0800
Subject: Good script editor for Python on Mac OS 10.3
In-Reply-To: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
Message-ID: <1164841393.939122.202630@80g2000cwy.googlegroups.com>

Install wxPython and than you can use SPE, a free Python IDE with UML,
GUI builders, ...

Stani

Scott_Davies wrote:
> Hi,
>
> I have an old Mac with OS X Panther installed.  I also have the Python
> language download file, but I haven't got a text/script editor to use
> for it.  Does anyone have a recommendation for a good Python text
> editor in OS 10.3?
> 
> Thanks,
> 
> Scott D.



From pavlovevidence at gmail.com  Mon Nov 13 20:16:39 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Nov 2006 17:16:39 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.95.1163450121.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
Message-ID: <1163466999.563860.30680@m73g2000cwd.googlegroups.com>

Ben Finney wrote:
> Michael Hobbs <mike at hobbshouse.org> writes:
>
> > To be clear, this is the actual thrust of my argument. It seems
> > redundant to have *both* line continuations and colons in compound
> > statements.
>
> Why are you trying to remove redundancy? The language is designed for
> communication between people (programmers) primarily. Redundancy is
> often the best way to be explicit and readable.

Well, Python *is* quite a notorious redundancy minimizer....


Carl Banks



From nicolasg at gmail.com  Wed Nov  8 17:23:09 2006
From: nicolasg at gmail.com (NicolasG)
Date: 8 Nov 2006 14:23:09 -0800
Subject: help using smtplib to work ..
Message-ID: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>

I'm using the following code to send e-mail through python:

import smtplib

fromaddr = 'myMail at gmail.com'
toaddrs  = 'myOtherMail at gmail.com'
subject = 'someting for subject !'

msg = 'This is body of the mail.'

msg = 'From: ' + fromaddr + '\nTo: ' + toaddrs + '\nSubject:' + subject
+ '\n\n' + msg
print "Message length is " + repr(len(msg))

server = smtplib.SMTP('smtp.gmail.com')
server.set_debuglevel(1)
server.sendmail(fromaddr, toaddrs, msg)
server.quit()

I have replaced the sender and receiver's mail address with the
original ones but executing this code I get the error (ip is hided for
obvious reason):

send: 'ehlo computer.domain_not_set.invalid\r\n'
reply: '250-mx.google.com at your service, [xxx.xx.xxx.xxx]\r\n'
reply: '250-SIZE 20971520\r\n'
reply: '250-8BITMIME\r\n'
reply: '250-STARTTLS\r\n'
reply: '250 ENHANCEDSTATUSCODES\r\n'
reply: retcode (250); Msg: mx.google.com at your service,
[xxx.xx.xxx.xxx]
SIZE 20971520
8BITMIME
STARTTLS
ENHANCEDSTATUSCODES
send: 'mail FROM:<myMail at gmail.com> size=106\r\n'
reply: '530 5.7.0 Must issue a STARTTLS command first
s1sm7666914uge\r\n'
reply: retcode (530); Msg: 5.7.0 Must issue a STARTTLS command first
s1sm7666914uge
send: 'rset\r\n'
reply: '250 2.1.0 Flushed s1sm7666914uge\r\n'
reply: retcode (250); Msg: 2.1.0 Flushed s1sm7666914uge
Traceback (most recent call last):
  File "C:\Documents and Settings\NicolasG\Desktop\smtpexample.py",
line 17, in <module>
    server.sendmail(fromaddr, toaddrs, msg)
  File "C:\Python25\lib\smtplib.py", line 684, in sendmail
    raise SMTPSenderRefused(code, resp, from_addr)
SMTPSenderRefused: (530, '5.7.0 Must issue a STARTTLS command first
s1sm7666914uge', 'myMail at gmail.com')

What am I doing wrong ?



From dlenski at gmail.com  Thu Nov  9 15:12:31 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 12:12:31 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163102807.741768.195310@m73g2000cwd.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<1163102807.741768.195310@m73g2000cwd.googlegroups.com>
Message-ID: <1163103151.772022.300950@k70g2000cwa.googlegroups.com>

John Henry wrote:
> I assume you meant that the example programs looks LabView-like GUIs?
> PythonCard itself has nothing in common with LabView.   It's more like
> HyperCard.

That's right, I'm saying the GUIs *produced* by PythonCard look like
those produced by LabView.  Believe me, if the PythonCard programming
style had anything to do with LabView, I'd avoid it like the plague =)

In any case, I think I'm gonna give PythonCard a shot before trying
full-fledged wxPython.  It looks ideal for my needs.

Dan



From cyberco at gmail.com  Mon Nov 20 06:17:51 2006
From: cyberco at gmail.com (cyberco)
Date: 20 Nov 2006 03:17:51 -0800
Subject: mod_python + fileinput => permission denied
Message-ID: <1164021471.620435.14450@k70g2000cwa.googlegroups.com>

Opening, reading and writing to a file works fine in mod_python, but
using fileinput (with inplace editing) gives me a 'permission denied'
with exactly the same fileName:

=========================
fileinput.input(fileName, inplace=1)
=========================

I suspect that this has to do with the temporary file it creates, or am
I wrong?



From antroy at gmail.com  Thu Nov  9 10:03:09 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 07:03:09 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <slrnel6dq5.1ns.horpner@FIAD06.norwich.edu>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
	<slrnel6dq5.1ns.horpner@FIAD06.norwich.edu>
Message-ID: <1163084589.148065.212640@h48g2000cwc.googlegroups.com>



On Nov 9, 2:11 pm, Neil Cerutti <horp... at yahoo.com> wrote:
...
> """ never are. Then I changed the synchronize declarations in
> /syntax/python.vim to the following:
>
>   syn sync match pythonSync grouphere NONE '"""$'
>   syn sync maxlines=300
>
> The above is no good for random Python code, though.
>
> But in random Python code you can simply increase the number of
> lines inspected as high as your machine can handle, as documented
> in python.vim.

I commented out the maxlines line, and uncommented the syn sync
minlines=2000 line, and that seems to have worked.

> The reason I haven't adapted quickfix mode to Python is that Vim
> would hide most of the Traceback. I'd constantly be executing the
> command to show the entire error message, so I've chosen to
> eschew quickfix mode for Python code.

Sounds interesting - I may take a look at it.

> ... default Python plugin provides the [[, ]] and [m, ]m commands
> for jumping to the next function or method respectively. They are
> a nice help once you're aware of them. There's a more powerful
> plugin available on the internet, but it the code-jumps were the
> main commands I wanted.

They sound good. I've been using the taglist.vim plugin for code
browsing which is pretty good for that sort of thing.

> pytags should be in your Tools directory. I haven't found it
> terribly useful, but in theory it's invaluable (my project is
> piddly in size at the moment).

I'll take a look. A code navigation tool I presume?

> If you set shiftwidth to your preferred Python indent, then
> indenting and unindenting code blocks is as easy as the < and >
> commands

Yes - I have that set up. Thanks for the tips :-)



From rtw at freenet.co.uk  Sat Nov 11 13:20:20 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sat, 11 Nov 2006 12:20:20 -0600
Subject: odd problem with watsup and VB6 application with modal dialog
References: <JNc5h.194$3i6.48@newsfe03.lga>
Message-ID: <Xns9878BAAE62FBErtwfreenetREMOVEcouk@216.196.109.145>

Grumman wrote in news:JNc5h.194$3i6.48 at newsfe03.lga in comp.lang.python:

[snip]

> Roughly, I have a script that fills in a field, sets a combobox, then 
> clicks a button via clickButton. At this point, the python interpreter
> hangs. The only thing I've been able to identify as different about
> this form is that it is set as dialog-modal.
> 
> I've managed to work around this by adding a second python script that
> contains just enough code to click the offending button. I call it via
> os.system('start other.py') and it starts in a different process,
> clicks the button then hangs. 
> 
> But the main script continues on to fill in the following form, and 
> click another button. When the VB app returns to its starting form, 
> destroying the other form instances, the hung interpreter ends.
> 
> This works, but it is quite the ugly kludge isn't it?
> 
> Is this a normal behaviour for watsup with modal windows? Is there a 
> saner way around it?

AFAICT the problem is that the clickButton() function calls
the internal windows API function SendMessage(), which waits
for the buttons event handler to return something.

There is an alternative PostMessage(), which returns as soon as
the message is put in the target windows message queue.

A potential proplen with this is that it will return immediately
so the caller will need to wait (time.sleep) until the button 
handler has recieved the message and done something about it.

Here's a rewrite of the winGuiAuto.clickButton function,
post_clickButton() that uses PostMessage:

def post_clickButton( hwnd ):
  '''All code here adapted from winGuiAuto.py
  see http://www.tizmoi.net/watsup/intro.html
  '''
  
  def _buildWinLong(high, low):
    '''Build a windows long parameter from high and low words.
    
    See http://support.microsoft.com/support/kb/articles/q189/1/70.asp
    '''
    return int( 0xFFFFFFFF & ( (high << 16) | (low & 0xFFFF) ) )
      
  def _postNotifyMessage(hwnd, notifyMessage):
    '''Post a notify message to a control.'''
    import win32gui
    import win32con
    import win32api
    
    win32gui.PostMessage(
        win32gui.GetParent(hwnd),
        win32con.WM_COMMAND,
        _buildWinLong(
        notifyMessage, win32api.GetWindowLong(hwnd, win32con.GWL_ID)
        ),
        hwnd
      )
  
  import win32con
  _postNotifyMessage( hwnd, win32con.STN_CLICKED )
 
if __name__=='__main__':

  '''Just here to show how it works, this code won't actually 
  work unless you have a sutible GUI programme running.
  '''

  from watsup.winGuiAuto import \
    findControl,setEditText, \
    findTopWindow,clickButton
  from time import sleep

  def main():
          
      form=findTopWindow(wantedText='Main_Form')
      button=findControl(form,wantedText='Open')

      print 'clicking button to open dialog...'
      post_clickButton(button)

      sleep( 0.5 )
      
      form=findTopWindow(wantedText='Dialog_Form')
      button=findControl(form,wantedText='Close')
      
      print "clicking close button"
      post_clickButton(button)
      
  main() 

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From harry.g.george at boeing.com  Wed Nov 29 09:34:23 2006
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 29 Nov 2006 14:34:23 GMT
Subject: Pimping the 'cgi' module (was: Re: python gaining popularity
	according to a study)
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<ek50ag$q3l$1@news.albasani.net>
	<mailman.670.1164364120.32031.python-list@python.org>
Message-ID: <xqxac2afhjk.fsf@cola3.ca.boeing.com>

Christoph Haas <email at christoph-haas.de> writes:

> On Thursday 23 November 2006 21:29, robert wrote:
> > When a LAMP programmer comes to Python, there are so many different
> > confusing things. It starts with a 'non-documented' cgi module - a
> > 'High-Level-Interface', that cannot even iterate over the form items. A
> > name ZOPE in focus which reveals to be a monster system with 2-year
> > learning-curve, ready for running an article editorial system for TOP-10
> > newspaper companies, but unable to make simple things simple. A handful
> > of different Djangos - choose one for each weekday and programmer ...
> > And Ruby made it with this single-known simple URL-to-method-router (And
> > possibly when coming from PHP & Perl one recognizes ::@$_$%??%/&... and
> > the old namespace dirt) If there would have been a good cgi-system and a
> > somewhat comfortable advanced URL-to-OO-router (beyond the socket
> > wrapper HTTPServer) well exposed in the Python standard lib, the numbers
> > would be probably very different today ...
> 
> I can fully second that. Coming from Perl and being used to the CGI module 
> that is de-facto standard and already doing things much better than 
> Python's equivalent my first thought was: "Does Python really expect me to 
> re-invent the wheel to write basic CGIs?" So I started creating 
> cookie-based session handlers, form field handling etc.
> 
> The reason of my posting it not only to complain though. My Python skills 
> are average but I would really like to help contribute some code on this 
> topic. I don't know Ruby-on-Rails myself but I have worked with CGIs for 
> ten years both in C (yuk) and Perl (Perl=semi-yuk / Perl-CGI=yum) and 
> think I know what people coming from Perl expect. And I'm not speaking of 
> Zope or Django or huge frameworks. I try to avoid frameworks wherever I 
> can (I want to write Python - not Zope or Django). I rather rely on the 
> standard library unless it's really saving me time and worth learning 
> another language. Are frameworks perhaps even telling that the standard 
> library is still lacking in some way?
> 
> I'm thinking of features like:
> - cookie handling
> - cookie-session handling (similar to PHP or Perl's CGI::Session; combined
>   with database backends or simple text files)
> - handling of form fields (Perl's CGI class can easily redisplay what
>   has been entered in the fields when they got submitted through a <FORM>)
> - accessing parameters (honestly I haven't yet understood why I need to use
>   .value on FielStorage dictionaries - why isn't it just a plain
>   dictionary?)
> - state keeping (storing the contents of all form fields on disk
>   to retrieve it later)
> - creating form elements easily (option lists for example from
>   dictionaries and lists like in Perl)
> - creating standard HTML elements (or do you remember how DOCTYPE
>   looks without looking it up?)
> - handling of file uploads (which is just a recipe on ActivePython
>   at the moment)
> - controlling HTTP headers (expires, redirections, charset)
> - convenience functions e.g. for getting the client IP address without
>   needing to read ENV['REMOTE_ADDR']
> 
> Well, of course there are modules like 'cgi' or 'cookielib' and others may 
> argue that everything is already there. And there is a 'Web.py' already (I 
> assume every CGI programmer has written their own Web.py already). But 
> can't we come closer to what other scripting languages provide? Something 
> common? Can't a simple form-based CGI just be a matter of a dozen lines? 
> When it comes to CGIs Python loses its elegance for no reason.
> 
> I'm ready to invest work and ideas if anyone else is interested. Perhaps 
> some day it makes it into the standard library or at least gives us 
> something between the features of the standard library and huge framework 
> monsters - something people can be pointed at when starting with Python 
> and CGIs. I'll probably do that anyway because my web projects all use 
> their own reinvented wheel and I'm losing the overview. And even Perl has 
> come that route - it started with a cgi-lib.pl which later became 
> the 'CGI' standard module.
> 
> Is it just a matter of lacking resources or interest? Even if there is no 
> interest I'll probably read "man CGI" and "man CGI::Session" again and 
> start implementing something nifty for ex-perlies like myself. Hmmm, 
> batteries included even for CGI programmers, a man can dream. :)
> 
> Cheers
>  Christoph

When I came from Perl, I too missed perl-isms and specifically CGI.pm, so wrote my own:
http://www.seanet.com/~hgg9140/comp/index.html
http://www.seanet.com/~hgg9140/comp/pyperlish/doc/manual.html
http://www.seanet.com/~hgg9140/comp/cgipm/doc/index.html

Others on this newsgroup said I'd be better off just doing it in raw
python.  After a while, I realized that was true.  You do
triple-quoted templates with normal python idioms.  Throw in
some persistence mechanisms to deal with maintaining state across
transactions, and you are in business.

Since then I've looked at Zope, Plone, TurboGears, Django, and (for
standalone apps) Dabo.  TurboGears is mostly a set of recommendations
on what 3rd party packages to use, with a wee bit of glueware.  So far
nothing feels as simple as just doing it in python.

-- 
Harry George
PLM Engineering Architecture


From timothy at open-networks.net  Thu Nov  9 17:34:42 2006
From: timothy at open-networks.net (timmy)
Date: Fri, 10 Nov 2006 08:34:42 +1000
Subject: SPE bug?
Message-ID: <4553ac8a@quokka.wn.com.au>

i can't paste from SPE into an xterm window. is this problem with SPE?


From john at castleamber.com  Sat Nov 18 16:21:15 2006
From: john at castleamber.com (John Bokma)
Date: 18 Nov 2006 21:21:15 GMT
Subject: MAKE GOOD MONEY BY INTERNET
References: <1163848933.731124.307470@e3g2000cwe.googlegroups.com>
	<e%C7h.74$_H5.64@tornado.texas.rr.com>
Message-ID: <Xns987F9C3065916castleamber@130.133.1.4>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:

> Congratulations,

dumbfuck

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From john at castleamber.com  Sat Nov 18 01:25:43 2006
From: john at castleamber.com (John Bokma)
Date: 18 Nov 2006 06:25:43 GMT
Subject: decompiler
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
Message-ID: <Xns987F45C03807castleamber@130.133.1.4>

"jim" <gilbert3b2g at msn.com> wrote:

> Is there such thing as a free decompile that I can run in windows xp

You asked the same Q in comp.lang.perl.misc...

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From prouleau001 at gmail.com  Thu Nov 16 11:58:42 2006
From: prouleau001 at gmail.com (prouleau001 at gmail.com)
Date: 16 Nov 2006 08:58:42 -0800
Subject: atexit.register does not return the registered function. IMHO,
	it should.
In-Reply-To: <mailman.272.1163695065.32031.python-list@python.org>
References: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
	<mailman.272.1163695065.32031.python-list@python.org>
Message-ID: <1163696322.614398.23650@h54g2000cwb.googlegroups.com>



On Nov 16, 11:38 am, Carsten Haese <cars... at uniqsys.com> wrote:
> On Thu, 2006-11-16 at 08:03 -0800, prouleau... at gmail.com wrote:
> >   @atexit.register
> >   def goodbye():
> >       print "Goodbye, terminating..."
>
> > However, there is one fundamental problem with this: atexit.register()
> > returns None. Since the above code corresponds to::
>
> >   def goodbye():
> >       print "Goodbye, terminating..."
> >   goodbye = atexit.register(goodbye)
>
> > the code registers goodbye but right after it binds goodbye to None!While it wouldn't hurt to have atexit.register return the function it
> registered, this "problem" is only a problem if you wish to call the
> function manually, since atexit already registered the reference to the
> intended function before your reference to it gets rebound to None.
> Normally one would register a function with atexit precisely because
> they don't want to call it manually.
>
There are *two* problems.

1 - As you said, most of the time you would not call the function
explicitly, but in some situation you might want to.
2-  If you want to document your code using introspection, or use an
IDE to look at the function, if the function disappeared from sight,
you won't be able to.


The second problem is similar to what happens when a decorator changes
the signature of a function.

--

P.R.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Nov 23 17:35:58 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 23 Nov 2006 23:35:58 +0100
Subject: Access to variable from external imported module
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
Message-ID: <4smm2eF10389oU1@mid.individual.net>

GinTon wrote:

> Sorry, I mean access to local variable from a method
> 
> import module
> method(value)

That's no access to a local variable of a method. It's a simple
function call.
 
> I would to access to values that are created locally in that
> method

Something with your interface seems horribly wrong.

Regards,


Bj?rn

-- 
BOFH excuse #316:

Elves on strike. (Why do they call EMAG Elf Magic)



From prabhusanthanam at yahoo.com  Tue Nov  7 08:28:04 2006
From: prabhusanthanam at yahoo.com (prabhusanthanam)
Date: Tue, 07 Nov 2006 13:28:04 -0000
Subject: Python, PHP  Developers  required for a company in Bangalore.
Message-ID: <eiq1l4+8ed1@eGroups.com>

Python, PHP  Developers  required for a company in Bangalore.
Hi,


We have immediate requirements for Python, PHP 
Developers with our client in Bangalore.

Skillset : Linux/ Solaris/ FreeBSD/ etc. 
Apache HTTP Server, MySQL Database ,
 PHP , Ruby , Ruby on Rails Web Framework, 
Python Programming Language ,
Tcl / Expect Programming Language

Experience   : 5+ years.
Education    : BE/Btech/ME/M.Tech/MCA.
Job Type     : Permanent
Job Location : Bangalore.
 

If interested in this opportunity 
kindly email your updated CV with 
contact numbers to andre_unix@
yahoo.com


Do mention in the subject line
"Resume for Python, PHP Developers requirement in Bangalore."


Request you to kindly provide the following details
required by the client while applying:


Experience:
Current CTC :
Expected CTC:
Lead time to Join:
Current Company and Location:


thank you,
Ganesh C




From wo_shi_big_stomach at mac.com  Fri Nov 24 22:14:58 2006
From: wo_shi_big_stomach at mac.com (wo_shi_big_stomach)
Date: Fri, 24 Nov 2006 19:14:58 -0800
Subject: combining the path and fileinput modules
In-Reply-To: <7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
Message-ID: <4567B532.4030906@mac.com>

Gabriel Genellina wrote:
> The filter should be applied to walkfiles. Something like this:
> 
> dir = path(/home/wsbs/Maildir)
> for f in filter(os.path.isfile, dir.walkfiles('*')):
>         #
>         # test:
>         # print f 

Thanks, this way f will print the full pathname/filename. But f already
does that using Jason Orendorff's path module:

dir = path('/home/wsbs/Maildir')
for f in dir.walkfiles('*'):
	print f

Printing the full path/filename isn't the problem. The problem instead
is how to supply f to fileinput.input().

Either the path or the os.path methods cause this line:

for line in fileinput.input(f, inplace=1, backup='.bak'):

to throw this error:

  File "./p2.py", line 23, in ?
    for line in fileinput.input(f, inplace=1, backup='.bak'):

At this point I believe the error has to do with fileinput, not the path
or os.path modules.

If I give fileinput.input() a hardcoded path/filename in place of 'f'
the program runs. However the program will not accept either f or 'f' as
an argument to fileinput.input().

Again, thanks for guidance on the care and feeding of fileinput.input()

/wsbs

import fileinput
import os
import re
import string
import sys
from path import path

# p.pl - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with "From "
# for each match, program deletes line

# recurse dirs
dir = path('/home/wsbs/Maildir')
#for f in dir.walkfiles('*'):
for f in filter(os.path.isfile, dir.walkfiles('*')):
	#
	# test: this will print the full path/filename of each file
	print f
	#
	# open file, search, change if necessary, write backup
# 	for line in fileinput.input('f', inplace=1, backup='.bak'):
# 	# just print 2nd and subsequent lines
#   		if not fileinput.isfirstline():
# 			print line.rstrip('\n')
# 		# check first line only
# 		elif fileinput.isfirstline():
#  			if not re.search('^From ',line):
#  				print line.rstrip('\n')
# 	fileinput.close()




From horpner at yahoo.com  Wed Nov 29 10:46:32 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 29 Nov 2006 16:46:32 +0100
Subject: trouble writing results to files
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<ekk9c9$59i$1@cernne03.cern.ch>
Message-ID: <slrnemrat6.o0.horpner@FIAD06.norwich.edu>

On 2006-11-29, Roberto Bonvallet <Roberto.Bonvallet at cern.ch> wrote:
> Neil Cerutti wrote:
>> On 2006-11-29, Roberto Bonvallet <Roberto.Bonvallet at cern.ch> wrote:
>>> BTW, iterating over range(len(a)) is an anti-pattern in Python.
>> 
>> Unless you're modifying elements of a, surely?
>
> enumerate is your friend :)
>
>     for n, item in enumerate(a):
> 	if f(item):
> 	    a[n] = whatever

I was going to bring it up but I had a brainfart about the order
of (n, item) in the tuple and was too lazy to look it up. ;-)

-- 
Neil Cerutti


From chrisBrat at gmail.com  Tue Nov 21 03:46:21 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 21 Nov 2006 00:46:21 -0800
Subject: class method vs static method
Message-ID: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>

Hi,

I've done some reading up but I cant get my head around how/why class
methods can be used as apposed to static methods.

Can anyone give an example of where they have used class methods?

Thanks,
Chris



From mgiann at beta-cae.gr  Mon Nov 27 05:15:18 2006
From: mgiann at beta-cae.gr (Michalis Giannakidis)
Date: Mon, 27 Nov 2006 12:15:18 +0200
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <ekecd9$e8c$1@sea.gmane.org>
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr>
	<ekecd9$e8c$1@sea.gmane.org>
Message-ID: <200611271215.18792.mgiann@beta-cae.gr>

On Monday 27 November 2006 11:50, Fredrik Lundh wrote:

> "obj[index] = value" maps to "obj.__setitem__(index, value)".  reading
> the documentation might help; start here:
>
>      http://docs.python.org/ref/specialnames.html

In this documentation page it also says:
--snip---
then x[i] is equivalent3.2 to x.__getitem__(i). 
--snip--
This, and other statements, are only roughly true for instances of new-style 
classes. 
--snip--

So which statements are actually true for new style classes? 

Is l[0]=1 completely different from l.append(1) or maybe insert?

And is there a mechanism in Python that will allow me to override the 
operators of a class, for all its occurrences, even the ones implemented on C 
built-in objects?


-- 
Michalis Giannakidis


From bignose+hates-spam at benfinney.id.au  Thu Nov  9 18:56:04 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 10 Nov 2006 10:56:04 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org>
Message-ID: <87ac30kwdn.fsf@benfinney.id.au>

Please don't hide your new thread as a reply to an existing, unrelated
message. Start a new message if your message isn't actually a reply.

Michael Hobbs <mike at hobbshouse.org> writes:

> Can anyone find a flaw with this change in syntax?
>
> Instead of dividing a compound statement with a colon, why not
> divide it on a newline? For example, the colon could be dropped from
> this statement:
>     if self.hungry:
>         self.eat()
> to
>     if self.hungry
>         self.eat()

But it can't be dropped from this statement:

    if self.hungry: self.eat()

> The colon that divides the statement therefore seems redundant. The
> colon could continue to be used for single-line statements:
>     if self.hungry: self.eat()

Why have two different syntaxes for the same statement?

> I think the colon could be omitted from every type of compound
> statement: 'if', 'for', 'def', 'class', whatever. Am I missing
> anything?

A use case. What problem is being solved by introducing this
inconsistency?

-- 
 \                  "The shortest distance between two points is under |
  `\                                   construction."  -- Noelie Alito |
_o__)                                                                  |
Ben Finney



From paul at boddie.org.uk  Thu Nov 16 15:16:50 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 12:16:50 -0800
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<mailman.253.1163682538.32031.python-list@python.org>
	<1163697632.352189.110920@h54g2000cwb.googlegroups.com>
	<Xns987D75107703castleamber@130.133.1.4>
Message-ID: <1163708210.203188.230260@f16g2000cwb.googlegroups.com>

John Bokma wrote:
> "Luis M. Gonz?lez" <luismgz at gmail.com> wrote:
> >
> > I know, but would you consider a python cgi application a good
> > competence against php?
>
> php running as cgi you mean.

Perhaps not: he's referring to deployment on really cheap hosting
solutions which might support mod_php but wouldn't support anything
better than CGI for Python software. The suitability of mod_php and the
supposed unsuitability of mod_python for commodity hosting did come up
on comp.lang.python some time ago, a while before certain other trends,
and has seemingly been discussed every year for several years:

http://groups.google.co.uk/group/comp.lang.python/msg/ebf390af4ed6e92e

"Thus, for mod_python hosting to be reliable, you have to give each
user their own instance of the Apache server (proxied through a central
instance of Apache). This might, in fact, no longer be needed with the
latest mod_python, but I leave that to the mod_python experts in this
newsgroup to expound upon if so." (To which there was no response.)

This discussion only differs from those previous discussions [1] in the
sense that better hosting is now available for less, although you can't
get a virtual server for $1/month unless you have some contacts in the
business.

Paul

[1] http://groups.google.co.uk/groups?oi=djq&as_q=mod_python+PHP+hosting



From fredrik at pythonware.com  Wed Nov 29 11:00:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 17:00:30 +0100
Subject: trouble writing results to files
In-Reply-To: <slrnemra5e.po.horpner@FIAD06.norwich.edu>
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
Message-ID: <ekkaqu$74g$1@sea.gmane.org>

Neil Cerutti wrote:

>> BTW, iterating over range(len(a)) is an anti-pattern in Python.
> 
> Unless you're modifying elements of a, surely?

and needs to run on a Python version that doesn't support enumerate.

</F>



From fredrik at pythonware.com  Wed Nov 15 06:48:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 12:48:27 +0100
Subject: Decimal() instead of float?
In-Reply-To: <4559F828.7070704@holdenweb.com>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>
Message-ID: <ejeuqb$ldd$1@sea.gmane.org>

Steve Holden wrote:

>> It /would/ be nice to see Decimal() become the default.  I cannot 
>> imagine why in an otherwise "human enough" language, math wouldn't be 
>> included in that without going out of one's way to do it.  :-)
>>
> Speed has a lot to do with it. Have you timed some decimal operations 
> against their floating-point counterparts? It might be possible to build 
> a version of Python that used decimal instead of floating-point but it 
> certainly wouldn't be trivial: consider the use of C language libraries 
> that know nothing of Python's decimal representation.

judging from the various decimal FAQ:s, I think it's a bit naive to 
think that using Decimal instead of float would somehow make everything 
"just work":

http://www2.hursley.ibm.com/decimal/decifaq.html
http://effbot.org/pylib/decimal.htm#decimal-faq

(btw, the OP mentioned in private mail that he wanted to store 
geographical coordinates in decimal because floats kept messing things 
up, but given that a 64-bit float can hold enough decimal digits to 
represent a geographical coordinate with sub-millimeter precision on a 
global scale, I'm not sure I buy that argument.  I suspect he was just 
tricked by the usual repr(1.15) != "1.15" issue.  and seriously, under-
standing the various aspects of floats and decimals is utterly trivial 
compared to all the nearly-magical things you need to understand to be 
able to do geographical calculations at a sub-millimeter scale.  heck, 
even sub-kilometer stuff is pretty hard to get right ;-)

</F>



From ludwig.frank at gmail.com  Fri Nov 24 20:29:34 2006
From: ludwig.frank at gmail.com (ludwig.frank at gmail.com)
Date: 24 Nov 2006 17:29:34 -0800
Subject: mouse clicks in console window delayed
Message-ID: <1164418174.204455.32940@m7g2000cwm.googlegroups.com>

Hi,

I am attempting to detect mouse clicks from within curses, using
"select" on sys.stdin. It is working great within an xterm under X, but
not very well in a "real" linux console. When I click my mouse while on
the "real" console, nothing happens at first, even on repeated clicks.
Once I press a keyboard key, I see a "409" in my trace, indicating the
mouse event. The next keystroke will bring up the two keyboard events.
The additional mouse clicks (all but the first or all but the last, I
don't know) are lost.

I am wondering if someone could tell me why this is happening, and more
importantly, what to do about it (short of changing the entire
detection loop to busy polling. I noticed I am not the first with this
problem but I haven't yet found a solution posted.

Additional observations: Happens with the last gpm, regardless whether
compiled --without-curses or not. I do see my mouse events happen
instantly watching the output of gpm's "mev". Interestingly, I see the
mouse clicks almost immediately when I code a busy loop around
screen.getch().

System info: Python 2.5, OpenSuse 10.1, gpm 1.20.1, tried several
terminal types without seeing a difference.

Thanks in advance,
Frank



From sjmachin at lexicon.net  Thu Nov  9 02:44:04 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Nov 2006 23:44:04 -0800
Subject: opening excel
In-Reply-To: <4552d34b$1@quokka.wn.com.au>
References: <4552d34b$1@quokka.wn.com.au>
Message-ID: <1163058244.735201.62830@h48g2000cwc.googlegroups.com>


timmy wrote:
> Hello,
>
> has anybody got any experience opening and manilpulating excel
> spreedsheets via python? it seems pythoncom allows this to happen but
> i'm a total newb to it. (i usually work in the unix world)
> all i need to do, is open the xls files and read values from it.

If you really mean "read" rather than "manipulate", have a look at the
xlrd package (of which I'm the author).

http://www.python.org/pypi/xlrd

BTW, it's pure Python; you can run it on your unix box if you like :-)

Cheers,
John



From grante at visi.com  Wed Nov 29 12:32:37 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Nov 2006 17:32:37 -0000
Subject: pickle and infinity
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
Message-ID: <12mrh1lgbaomca1@corp.supernews.com>

On 2006-11-29, Bart Ogryczak <B.Ogryczak at gmail.com> wrote:

> I?ve got this problem with pickle, it seems it doesn?t handle
> correctly infinite values (nor does Python return
> overflow/underflow error). What could I do about it?

Here's what I did.  I'm sure it'll fall down on some systems,
but it works on Linux and Windows.

______________________________________________________________________
# unpickle can't handle nan/inf/ind floats, so we need to
# handle that ourselves

def myload_float(self):
    s = self.readline()[:-1]
    try:
        f = float(s)
    except ValueError:
        s = s.upper()
        if s in ["1.#INF", "INF"]:
            f = 1e300*1e300
        elif s in ["-1.#INF", "-INF"]:
            f = -1e300*1e300
        elif s in ["NAN","1.#QNAN","-1.#QNAN","QNAN","1.#IND","IND","-1.#IND"]:
            f = (1e300*1e300)/(1e300*1e300)
        else:
            raise ValueError, "Don't know what to do with "+`s`
    self.append(f)

# unpickle routine that overrides the float load method
    
def unpickle(f):
    unpickler = pickle.Unpickler(f)
    unpickler.dispatch[pickle.FLOAT] = myload_float
    return unpickler.load()
______________________________________________________________________

-- 
Grant Edwards                   grante             Yow!  I represent a
                                  at               sardine!!
                               visi.com            


From claird at lairds.us  Sat Nov 25 18:58:00 2006
From: claird at lairds.us (Cameron Laird)
Date: Sat, 25 Nov 2006 23:58:00 +0000
Subject: Dynamic function execution
References: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
	<mailman.718.1164469686.32031.python-list@python.org>
Message-ID: <8t1n34-qsv.ln1@lairds.us>

In article <mailman.718.1164469686.32031.python-list at python.org>,
Fredrik Lundh  <fredrik at pythonware.com> wrote:
>Andy Wu wrote:
>
>> def func(seconds = None, minutes = None, hours = None):
>>     ...
>> 
>> In my program I can get a string object('seconds', 'minutes', 'hours')
>> to specify which parameter to use, the problem is I don't know how to
>> call the function.
>> 
>> Say I have a string 'minutes' and a integer 30, now I need to call the
>> func this way: func(minutes = 30), how do I do this?
>
>    func(**{"minutes": 30})
>
></F>
>

Now I'm confused:  what's the advantage of 

  def func(seconds = None, minutes = None, hours = None):
      print seconds
      print minutes
      print hours

  func(**{"minutes": 30})

over

  def func(seconds = None, minutes = None, hours = None):
      print seconds
      print minutes
      print hours

  func(minutes = 30)

?  Or am I missing the point that a better example of what 
Mr. Wu really wants is

  def func(seconds = None, minutes = None, hours = None):
      print seconds
      print minutes
      print hours

  dimension = "minutes"
  func(**{dimension: 30})

?


From walterbyrd at iname.com  Thu Nov 16 18:15:48 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 16 Nov 2006 15:15:48 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.276.1163700314.32031.python-list@python.org>
References: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>
	<mailman.276.1163700314.32031.python-list@python.org>
Message-ID: <1163718948.174629.152180@h54g2000cwb.googlegroups.com>


Tim Chase wrote:

> I can't say I've come across any hosting places that serve up PHP
> for $10/yr either...the closest I've found is about $3.50/mo
> (which also provides Python CGI).


dollar-hosting.net offers php5 and python 2.3, for $10 a year.
the-protagonist.net has PHP 4.4 hosting for $10 a year. I'm sure I
could find more. Both of those sites use Apache 1.3.



From skip at pobox.com  Wed Nov  8 11:37:29 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 10:37:29 -0600
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <eistaq$m7u$1@panix3.panix.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
Message-ID: <17746.1993.906293.522739@montanaro.dyndns.org>


    Beliavsky> English is a rich language, and there are better ways of
    Beliavsky> doing that.

    aahz> Oh, gimme a fucking break.

I'm with Beliavsky on this one.  I can't see any particular reason to curse
in a forum such as c.l.py.  It just coarsens the discussion with no obvious
positive benefit as far as I can see.

Skip


From fredrik at pythonware.com  Sun Nov 12 19:06:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 01:06:34 +0100
Subject: explicit self revisited
In-Reply-To: <ej7m2l$tsm$1@sea.gmane.org>
References: <ej5fuv$a4a$1@online.de>	<mailman.2110.1163283825.11739.python-list@python.org>	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>	<mailman.2119.1163289905.11739.python-list@python.org>	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>	<1163351573.3497.26.camel@localhost.localdomain>
	<ej7m2l$tsm$1@sea.gmane.org>
Message-ID: <ej8cu7$vtt$1@sea.gmane.org>


> I suppose that in his view, language advocacy is a zero-sum game, so 
> positive comments about Python can be considered as FUD against his own 
> project.  He's even invented his own del.icio.us tag for this purpose:
> 
>      http://del.icio.us/tag/pythonfud

now at:

     http://del.icio.us/tag/python-fud

</F>



From george.sakkis at gmail.com  Tue Nov 21 14:55:33 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Nov 2006 11:55:33 -0800
Subject: Why is class decorator on method loosing self?
References: <mailman.535.1164117922.32031.python-list@python.org>
	<1164135863.270437.80340@b28g2000cwb.googlegroups.com>
Message-ID: <1164138933.778974.42620@f16g2000cwb.googlegroups.com>

George Sakkis wrote:

> I don't think you can make it work without resorting to metaclass
> magic. At the point of decoration min_max is still a function, not a
> method, because class Foo has not been created yet. Here's a way to do
> it with a custom metaclass; whether you really want to do it is a
> different matter:

An improvement to my previous hack: leave memoize as is in the cookbook
(extending decoratorargs) and add two lines to decoratorargs:

# This would usually be defined elsewhere
class decoratorargs(object):
    def __new__(typ, *attr_args, **attr_kwargs):
        def decorator(orig_func):
            self = object.__new__(typ)
            self.__init__(orig_func, *attr_args, **attr_kwargs)
            if callable(self):
                self._customize = lambda cls: MethodType(self, None,
cls)
            return self
        return decorator

Now you don't need memoizefunction and memoizemethod, but you still
need the customized metaclass (changed __customize to _customize; name
turns to a PITA sooner or later):

class CustomizeMeta(type):
    def __init__(cls, name, bases,dict):
        for attr,val in dict.iteritems():
            if hasattr(val, '_customize'):
                setattr(cls, attr, val._customize(cls))


#==== examples =============================================

@memoize(3)
def fib(n):
    return (n > 1) and (fib(n - 1) + fib(n - 2)) or 1

class Foo(object):
    __metaclass__ = CustomizeMeta

    def __init__(self, i): self._i = i

    def banner(self):
        print "Testing method"

    @memoize(3)
    def min_max(self, sequence):
        self.banner()
        return min(sequence), max(sequence)
 
foo = Foo()
print foo.min_max([9,7,5,3,1])


George



From researchbase at gmail.com  Fri Nov  3 00:04:23 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Fri, 3 Nov 2006 10:34:23 +0530
Subject: a newbi problem: can't find complete python curses library
Message-ID: <f81479dd0611022104i290b14c4w41dc58cf191882fe@mail.gmail.com>

hello,
I am a new member to this list.
I am Krishnakant from India, Mumbai.
I have been coding in python for quite some time and now I am at the
intermediate level of programming as far as python is concerned.
I am going to develop a accounting software that can work on the
console and accessed through ssh from other terminals.
I will like to use the curses or ncurses library for the menus and the
input forms with add, save, delete, update and cancel buttens.
I also need to create drop down menus with a top level menu bar.
I read a few articles about python wrapping curses but can't find some
thing very comprehencive.
my question is,
does python possess a complete wrapper to ncurses and its related
libraries like menu, panel and form?
if yes then where can I find documentation?
I read the python documentation and could manage to find out the
window object but nothing on menus and panels and forms.
thanks and regards.
Please help,
Krishnakant.


From anthra.norell at vtxmail.ch  Fri Nov  3 13:22:10 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 03 Nov 2006 19:22:10 +0100
Subject: ANN: SE 2.3. Available now
In-Reply-To: <454B6FEC.20709@islandtraining.com>
References: <454B3B49.6070702@vtxmail.ch> <454B6FEC.20709@islandtraining.com>
Message-ID: <454B88D2.7050000@vtxmail.ch>

Gary Herron wrote:
> Frederic Rentsch wrote:
>   
>> A few Cheese Shop upload problems have been solved with the help of this 
>> creative group. Thank you all!
>>
>> Version 2.2 beta should be phased out. It has a functional defect, 
>> missing matches with a very low statistical probability. Version 2.3 has 
>> this fixed.
>>
>>    Download URL: http://cheeseshop.python.org/pypi/SE/2.3
>>   
>>     
> As a matter of polite netiquette, a message like this really ought to
> have a paragraph telling us what SE *is*.    (Unless it's a secret :-))
>
>   
Thanks for the inquiry. I've been hawking this thing so persistently of 
late that I'm afraid to start being perceived as a nuisance. SE is a 
stream editor that is particularly easy  and fast to use. A summary of 
its characteristics is only a click away at the URL a few lines up from 
this line.

Frederic
>> A list of possible handling improvements is being made to be 
>> incorporated in the next version, One major flaw of the interface design 
>> came to light the other day when a user reported a non-functioning 
>> Editor Object made with a file name. If the constructor cannot find the 
>> file it records the fact in the object's log without making the user 
>> aware that his Editor Object is incomplete or altogether devoid of 
>> substitutions. His obvious conclusion is that the damn thing isn't 
>> working right.
>>    Compile errors should certainly be reported at compile time. The next 
>> version will send all messages being logged also to stderr by default. 
>> The thing to do with the current version, if it appears to malfunction, 
>> is to inspect the log and the compiled substitutions.
>>
>>  >>> Editor = SE.SE ('operators.se')
>>  >>> Editor.show_log ()
>>
>> Fri Nov 03 12:49:17 2006 - Compiler - Ignoring single word 
>> 'operators.se'. Not an existing file 'operators.se'.
>>
>>  >>> Editor = SE.SE ('se/operators.se')   # path was missing
>>  >>> Editor.show_log ()
>>
>> (Log is empty. All is well.)
>>
>>  >>> Editor.show (show_translators = 1)
>>
>> (snip)
>>
>> Single-Byte Targets
>>     1: |<|->|LT|
>>     2: |>|->|GT|
>>
>> Multi-Byte Targets
>>     3: |&&|->|AND|
>>     4: ||||->|OR|
>>
>> etc...
>>
>> The display makes definition errors conspicuous. Missing definitions 
>> indicate malformed or redefined (overwritten) ones.
>>
>>
>> Frederic
>>
>>
>>   
>>     
>
>   




From kbk at shore.net  Tue Nov  7 23:31:22 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Tue, 7 Nov 2006 23:31:22 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200611080431.kA84VM59025651@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  430 open ( -4) /  3447 closed (+17) /  3877 total (+13)
Bugs    :  922 open ( -7) /  6316 closed (+31) /  7238 total (+24)
RFE     :  245 open ( +0) /   241 closed ( +1) /   486 total ( +1)

New / Reopened Patches
______________________

modulefinder changes for py3k  (2006-10-27)
CLOSED http://python.org/sf/1585966  opened by  Thomas Heller

no wraparound for enumerate()  (2006-10-28)
CLOSED http://python.org/sf/1586315  opened by  Georg Brandl

missing imports ctypes in documentation examples  (2006-09-13)
CLOSED http://python.org/sf/1557890  reopened by  theller

better error msgs for some TypeErrors  (2006-10-29)
       http://python.org/sf/1586791  opened by  Georg Brandl

cookielib: lock acquire/release try..finally protected  (2006-10-30)
       http://python.org/sf/1587139  opened by  kxroberto

Patch for #1586414 to avoid fragmentation on Windows  (2006-10-31)
       http://python.org/sf/1587674  opened by  Enoch Julias

Typo in Mac installer image name  (2006-11-01)
CLOSED http://python.org/sf/1589013  opened by  Humberto Di?genes

Typo in Mac image name  (2006-11-01)
CLOSED http://python.org/sf/1589014  opened by  Humberto Di?genes

MacPython Build Installer - Typos and Style corrections  (2006-11-02)
CLOSED http://python.org/sf/1589070  opened by  Humberto Di?genes

bdist_sunpkg distutils command  (2006-11-02)
       http://python.org/sf/1589266  opened by  Holger

The "lazy strings" patch  (2006-11-04)
       http://python.org/sf/1590352  opened by  Larry Hastings

adding __dir__  (2006-11-06)
       http://python.org/sf/1591665  opened by  ganges master

`in` for classic object causes segfault  (2006-11-07)
       http://python.org/sf/1591996  opened by  Hirokazu Yamamoto

PyErr_CheckSignals returns -1 on error, not 1  (2006-11-07)
       http://python.org/sf/1592072  opened by  Gustavo J. A. M. Carneiro

Add missing elide argument to Text.search  (2006-11-07)
       http://python.org/sf/1592250  opened by  Russell Owen

Patches Closed
______________

Fix for structmember conversion issues  (2006-08-30)
       http://python.org/sf/1549049  closed by  loewis

Enable SSL for smtplib  (2006-09-28)
       http://python.org/sf/1567274  closed by  loewis

Mailbox will not lock properly after flush()  (2006-10-11)
       http://python.org/sf/1575506  closed by  akuchling

urllib2 - Fix line breaks in authorization headers  (2006-10-09)
       http://python.org/sf/1574068  closed by  akuchling

Tiny patch to stop make spam  (2006-06-09)
       http://python.org/sf/1503717  closed by  akuchling

modulefinder changes for py3k  (2006-10-27)
       http://python.org/sf/1585966  closed by  gvanrossum

unparse.py decorator support  (2006-09-04)
       http://python.org/sf/1552024  closed by  gbrandl

no wraparound for enumerate()  (2006-10-28)
       http://python.org/sf/1586315  closed by  rhettinger

missing imports ctypes in documentation examples  (2006-09-13)
       http://python.org/sf/1557890  closed by  theller

missing imports ctypes in documentation examples  (2006-09-13)
       http://python.org/sf/1557890  closed by  nnorwitz

tarfile.py: better use of TarInfo objects with longnames  (2006-10-24)
       http://python.org/sf/1583880  closed by  gbrandl

tarfile depends on undocumented behaviour  (2006-09-25)
       http://python.org/sf/1564981  closed by  gbrandl

Typo in Mac installer image name  (2006-11-02)
       http://python.org/sf/1589013  closed by  ronaldoussoren

Typo in Mac image name  (2006-11-01)
       http://python.org/sf/1589014  deleted by  virtualspirit

MacPython Build Installer - Typos and Style corrections  (2006-11-02)
       http://python.org/sf/1589070  closed by  ronaldoussoren

bdist_rpm not able to compile multiple rpm packages  (2004-11-04)
       http://python.org/sf/1060577  closed by  loewis

Remove inconsistent behavior between import and zipimport  (2005-11-03)
       http://python.org/sf/1346572  closed by  loewis

Rational Reference Implementation  (2002-10-02)
       http://python.org/sf/617779  closed by  loewis

Problem at the end of misformed mailbox  (2002-11-03)
       http://python.org/sf/632934  closed by  loewis

New / Reopened Bugs
___________________

csv.reader.line_num missing 'new in 2.5'  (2006-10-27)
CLOSED http://python.org/sf/1585690  opened by  Kent Johnson

tarfile.extract() may cause file fragmentation on Windows XP  (2006-10-28)
       http://python.org/sf/1586414  opened by  Enoch Julias

compiler module dont emit LIST_APPEND  w/ list comprehension  (2006-10-29)
CLOSED http://python.org/sf/1586448  opened by  sebastien Martini

codecs.open problem with "with" statement  (2006-10-28)
CLOSED http://python.org/sf/1586513  opened by  Shaun Cutts

zlib/bz2_codec doesn't support incremental decoding  (2006-10-29)
CLOSED http://python.org/sf/1586613  opened by  Topia

hashlib documentation is insuficient  (2006-10-29)
CLOSED http://python.org/sf/1586773  opened by  Marcos Daniel Marado Torres

scipy gammaincinv gives incorrect answers  (2006-10-31)
CLOSED http://python.org/sf/1587679  opened by  David J.C. MacKay

quoted printable parse the sequence '= ' incorrectly  (2006-10-31)
       http://python.org/sf/1588217  opened by  Wai Yip Tung

string subscripting not working on a specific string  (2006-11-02)
CLOSED http://python.org/sf/1588975  opened by  Dan Aronson

Unneeded constants left during optimization  (2006-11-02)
CLOSED http://python.org/sf/1589074  opened by  Daniel

ctypes XXX - add a crossref, at least  (2006-11-02)
CLOSED http://python.org/sf/1589328  opened by  Jim Jewett

urllib2 does local import of tokenize.py  (2006-11-02)
       http://python.org/sf/1589480  reopened by  drfarina

urllib2 does local import of tokenize.py  (2006-11-02)
       http://python.org/sf/1589480  opened by  Daniel Farina

__getattr__ = getattr crash  (2006-11-03)
CLOSED http://python.org/sf/1590036  opened by  Brian Harring

Error piping output between scripts on Windows  (2006-11-03)
       http://python.org/sf/1590068  opened by  Andrei

where is zlib???  (2006-11-04)
       http://python.org/sf/1590592  opened by  AKap

mail message parsing glitch  (2006-11-05)
       http://python.org/sf/1590744  opened by  Mike

python: Python/ast.c:541: seq_for_testlist: Assertion fails  (2006-10-31)
CLOSED http://python.org/sf/1588287  opened by  Tom Epperly

python: Python/ast.c:541: seq_for_testlist: Assertion  (2006-11-05)
CLOSED http://python.org/sf/1590804  opened by  Jay T Miller

subprocess deadlock  (2006-11-05)
       http://python.org/sf/1590864  opened by  Michael Tsai

random.randrange don't return correct value for big number  (2006-11-06)
       http://python.org/sf/1590891  opened by  MATSUI Tetsushi

update urlparse to RFC 3986  (2006-11-05)
       http://python.org/sf/1591035  opened by  Andrew Dalke

problem building python in vs8express  (2006-11-05)
       http://python.org/sf/1591122  reopened by  thomashsouthern

problem building python in vs8express  (2006-11-05)
       http://python.org/sf/1591122  opened by  Thomas Southern

replace groups doesn't work in this special case  (2006-11-06)
CLOSED http://python.org/sf/1591319  opened by  Thomas K.

Urllib2.urlopen() raises OSError w/bad HTTP Location header  (2006-11-07)
       http://python.org/sf/1591774  opened by  nikitathespider

Undocumented implicit strip() in split(None) string method  (2005-01-19)
       http://python.org/sf/1105286  reopened by  yohell

Stepping into a generator throw does not work  (2006-11-07)
       http://python.org/sf/1592241  opened by  Bernhard Mulder

Bugs Closed
___________

python_d python  (2006-09-21)
       http://python.org/sf/1563243  closed by  sf-robot

glob.glob("c:\\[ ]\*) doesn't work  (2006-10-19)
       http://python.org/sf/1580472  closed by  gbrandl

structmember T_LONG won't accept a python long  (2006-08-24)
       http://python.org/sf/1545696  closed by  loewis

T_ULONG -> double rounding in PyMember_GetOne()  (2006-09-27)
       http://python.org/sf/1566140  closed by  loewis

Different behavior when stepping through code w/ pdb  (2006-10-24)
       http://python.org/sf/1583276  closed by  jpe

csv.reader.line_num missing 'new in 2.5'  (2006-10-27)
       http://python.org/sf/1585690  closed by  akuchling

asyncore.dispatcher.set_reuse_addr not documented.  (2006-09-20)
       http://python.org/sf/1562583  closed by  akuchling

inconsistency in PCALL conditional code in ceval.c  (2006-08-17)
       http://python.org/sf/1542016  closed by  akuchling

functools.wraps fails on builtins  (2006-10-12)
       http://python.org/sf/1576241  closed by  akuchling

str(WindowsError) wrong  (2006-10-12)
       http://python.org/sf/1576174  closed by  theller

does not raise SystemError on too many nested blocks  (2006-09-25)
       http://python.org/sf/1565514  closed by  nnorwitz

curses module segfaults on invalid tparm arguments  (2006-08-28)
       http://python.org/sf/1548092  closed by  nnorwitz

"from __future__ import foobar;" causes wrong SyntaxError  (2006-08-19)
       http://python.org/sf/1543306  closed by  nnorwitz

compiler module dont emit LIST_APPEND  w/ list comprehension  (2006-10-28)
       http://python.org/sf/1586448  closed by  gbrandl

distutils adds (unwanted) -xcode=pic32 in the compile comman  (2006-05-19)
       http://python.org/sf/1491574  closed by  nnorwitz

codecs.open problem with "with" statement  (2006-10-29)
       http://python.org/sf/1586513  closed by  gbrandl

suprocess cannot handle shell arguments  (2005-11-16)
       http://python.org/sf/1357915  closed by  gbrandl

zlib/bz2_codec doesn't support incremental decoding  (2006-10-29)
       http://python.org/sf/1586613  closed by  gbrandl

missing __enter__ + __getattr__ forwarding  (2006-10-20)
       http://python.org/sf/1581357  closed by  gbrandl

hashlib documentation is insuficient  (2006-10-29)
       http://python.org/sf/1586773  closed by  gbrandl

scipy gammaincinv gives incorrect answers  (2006-10-31)
       http://python.org/sf/1587679  closed by  loewis

string subscripting not working on a specific string  (2006-11-02)
       http://python.org/sf/1588975  closed by  gbrandl

ctypes XXX - add a crossref, at least  (2006-11-02)
       http://python.org/sf/1589328  closed by  theller

dict keyerror formatting and tuples  (2006-10-13)
       http://python.org/sf/1576657  closed by  gbrandl

__getattr__ = getattr crash  (2006-11-03)
       http://python.org/sf/1590036  closed by  arigo

potential buffer overflow in complexobject.c  (2006-10-13)
       http://python.org/sf/1576861  closed by  sf-robot

inspect.py imports local "tokenize.py" file  (2006-11-02)
       http://python.org/sf/1589480  closed by  loewis

python: Python/ast.c:541: seq_for_testlist: Assertion fails  (2006-10-31)
       http://python.org/sf/1588287  closed by  nnorwitz

python: Python/ast.c:541: seq_for_testlist: Assertion  (2006-11-05)
       http://python.org/sf/1590804  closed by  loewis

TypeError message on bad iteration is misleading  (2005-04-21)
       http://python.org/sf/1187437  closed by  gbrandl

replace groups doesn't work in this special case  (2006-11-06)
       http://python.org/sf/1591319  closed by  niemeyer

unchecked metaclass mro   (2006-09-28)
       http://python.org/sf/1567234  closed by  akuchling

curses getkey() crash in raw mode  (2004-02-09)
       http://python.org/sf/893250  closed by  akuchling

RFE Closed
__________

Unneeded constants left during optimization  (2006-11-02)
       http://python.org/sf/1589074  closed by  loewis



From klaus at seistrup.dk  Thu Nov 30 09:04:39 2006
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Thu, 30 Nov 2006 14:04:39 +0000 (UTC)
Subject: Remarkable results with psyco and sieve of Eratosthenes
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<slrnemtoe2.oju.pkarjala@paju.oulu.fi>
Message-ID: <ekmodn$v11$1@minji.szn.dk>

Pekka Karjalainen wrote:

> You can omit the call to math.sqrt if you test this instead.
>
>     y*y > x
>
> in place of if y > maxfact: .

Or use

	sqrt = lambda x: x ** .5

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/


From sjmachin at lexicon.net  Mon Nov 13 06:21:32 2006
From: sjmachin at lexicon.net (John Machin)
Date: 13 Nov 2006 03:21:32 -0800
Subject: str.title question after '
In-Reply-To: <slrnelgi3p.r7i.apardon@rcpc42.vub.ac.be>
References: <slrnelgi3p.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <1163416892.760544.9380@m7g2000cwm.googlegroups.com>

Antoon Pardon wrote:
> I have a text in ascii. I use the ' for an apostroph. The problem is
> this gives problems with the title method.  I don't want letters
> after a ' to be uppercased. Here are some examples:
>
>    argument       result          expected
>
>   't smidje       'T Smidje       't Smidje
>   na'ama          Na'Ama          Na'ama
>   al pi tnu'at    Al Pi Tnu'At    Al Pi Tnu'at
>
>
> Is there an easy way to get what I want?

Depends on your definition of "easy". Writing your own function that
will regard the apostrophe as a letter would be "easy" in my book.

>
> Should the current behaviour condidered a bug?

Its limitations could use some documentation.

> My would be inclined to answer yes, but that may be
> because this behaviour would be wrong in Dutch. I'm
> not so sure about english.
>

It's not very appropriate for English, either:

| >>> "didn't".title()
| "Didn'T"

It's OK for the English way of writing Irish surnames e.g. O'Brien, but
not IMHO very good behaviour for anything else.

The docs say: "Return a titlecased version of the string: words start
with uppercase characters, all remaining cased characters are
lowercase." Evidently the definition of "word" is the culprit.

Doing titlecasing properly depends heavily on the language/locale and
what data you are working on. For example, in the UK and anywhere that
Scots have migrated in reasonable numbers, you would probably want to
do McDonald and MacDonald. Avoiding nonsenses like MacE and MacHin :-)
takes some effort and a look-up table, and may not be cost-effective.

A related problem: some people mistakenly try too hard to correct
perceived data entry errors and also produce nonsenses -- a colleague
of Dutch extraction occasionally received mail addressed to Mr O'Belt
:-)

Cheers,
John



From john106henry at hotmail.com  Thu Nov 30 18:20:24 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 15:20:24 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <K_Ibh.10471$Gk5.4554@tornado.texas.rr.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
	<qqGbh.10436$Gk5.6159@tornado.texas.rr.com>
	<1164916148.930057.280350@f1g2000cwa.googlegroups.com>
	<1164916437.055932.193130@79g2000cws.googlegroups.com>
	<1164917296.255080.149660@j72g2000cwa.googlegroups.com>
	<K_Ibh.10471$Gk5.4554@tornado.texas.rr.com>
Message-ID: <1164928824.452080.260110@80g2000cwy.googlegroups.com>

Paul McGuire wrote:
> "John Henry" <john106henry at hotmail.com> wrote in message
> news:1164917296.255080.149660 at j72g2000cwa.googlegroups.com...
> >
> > John Henry wrote:
> >
> >>
> >> Further, if splitUp is a sub-class of string, then I can do:
> >>
> >> alist, blist, clist, dlist = "ABCDEFGHIJ".slice((1,1,3,None))
> >>
> >> Now, can I override the slice operator?
> >
> > Maybe like:
> >
> > alist, blist, clist, dlist = newStr("ABCDEFGHIJ")[1,1,3,None]
> >
>
> No need to contort string, just expand on your earlier idea.  I changed your
> class name to SplitUp to more more conventional (class names are usually
> capitalized), and changed slice to __call__.  Then I changed the lens arg to
> *lens - note the difference in the calling format.  Pretty close to what you
> have above.  Also, reconsider whether you want the __init__ function
> list-ifying the input src - let the caller decide what to send in.
>

In fact, should be possible to make that any object the caller want to
send in...

> -- Paul
>
> class SplitUp(object):
>    def __init__(self,src):
>        self._src=list(src)
>    def __call__(self, *lens):
>      ret = []
>      cur = 0
>      for length in lens:
>          if length is not None:
>              ret.append( self._src[cur:cur+length] )
>              cur += length
>          else:
>              ret.append( self._src[cur:] )
>      return ret
>
> alist, blist, clist, dlist = SplitUp("ABCDEFGHIJ")(1,1,3,None)
> print alist, blist, clist, dlist
>
> Prints:
> ['A'] ['B'] ['C', 'D', 'E'] ['F', 'G', 'H', 'I', 'J']

Thanks for the help,



From R.Brodie at rl.ac.uk  Thu Nov 16 11:25:40 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Thu, 16 Nov 2006 16:25:40 -0000
Subject: Yield
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
	<eji19t$cak$1@south.jnrs.ja.net>
	<1163693354.446751.38890@b28g2000cwb.googlegroups.com>
Message-ID: <eji3e4$d39$1@south.jnrs.ja.net>


"Danny Colligan" <dannycolligan at gmail.com> wrote in message 
news:1163693354.446751.38890 at b28g2000cwb.googlegroups.com...

> I absoultely agree.  Thanks for pointing me out to some real-world
> code.  However, the function you pointed me to is not a generator
> (there is no yield statement... it just returns the entire list of
> primes).

Oops,  should have looked at the code more closely. Another example
would be os.walk() in the standard library. 




From ronrsr at gmail.com  Fri Nov 10 12:05:36 2006
From: ronrsr at gmail.com (ronrsr)
Date: 10 Nov 2006 09:05:36 -0800
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
Message-ID: <1163178336.281812.140580@f16g2000cwb.googlegroups.com>

here's some of the surrounding code from the main program:



querystring = querystring + " ORDER BY keywords ";
#SQL
import zsql





zc = zsql.connect()

print("return from open")



zq = zc.query(querystring).dictresult()

ronrsr wrote:
> no matter where I place this imported file,the statement after it in
> the main program gets a syntax error, regardless of the syntax.
>
> I think I may have changed something in this file, but I'm stuck.  Can
> anyone help?
>
> #!/usr/local/bin/python
> # Copyright 2004 by Stephen Masterman
>
> #Change the db connection details here.
>
>
> import MySQLdb
>
>
>
>
> def connect():
>
>
>    return =  MySQLdb.connect (host = "db91x.xxxx.com",
>                            user = "xxxx",
>                             passwd = "xxxxx",
> 			db = "homebase_zingers"
>                            );



From martin at v.loewis.de  Thu Nov 30 15:29:16 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 30 Nov 2006 21:29:16 +0100
Subject: Python 2.4 does not marshal infinity floating point properly
	under Win32
In-Reply-To: <1164917855.809114.184580@j72g2000cwa.googlegroups.com>
References: <1164917855.809114.184580@j72g2000cwa.googlegroups.com>
Message-ID: <456f3f1c$0$8792$9b622d9e@news.freenet.de>

Pierre Rouleau schrieb:
> Is this considered an important enough bug to fix it in Python 2.4?

To the contrary - it's not considered a bug at all. Python didn't
make any promises about "unregular" floating point values, so things
like that just may happen.

The fix that made Python offer stronger guarantees in 2.5 cannot
be ported back to 2.4, since it would break the marshal format of
that release.

Finally, it's not very likely that *any* additional 2.4.x releases
are made at all; only 2.5.x is still actively maintained.

Regards,
Martin


From fredrik at pythonware.com  Thu Nov 23 13:56:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 19:56:57 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <4565ED24.3050900@sweetapp.com>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>	<ek3uqa$8lm$1@sea.gmane.org>
	<4565ED24.3050900@sweetapp.com>
Message-ID: <ek4qtq$6vr$1@sea.gmane.org>

Brian Quinlan wrote:

>> 4) [] and {} always create a new object every time they're evaluated.
> 
> Not quite. The empty tuple is cached:
> 
>  >>> a = ()
>  >>> b = ()
>  >>> a is b
> True

() isn't [] or {}, though.  time to switch to a bigger font? ;-)

</F>



From vedran at v-programs.com  Mon Nov 27 12:35:55 2006
From: vedran at v-programs.com (Croteam)
Date: 27 Nov 2006 09:35:55 -0800
Subject: shtoom complicated install
Message-ID: <1164648955.446613.66810@l12g2000cwl.googlegroups.com>

Hello,

I have install problem about shtoom.How to I Install shtoom
correct,when I install shtoom
with setup.py (shtoom package setup file), it just make some directory
(shtoom-0.2) and
3 python files with them.But just tell me this,when I was manual make
folder by name "shtoom" (as write in shtoom package setup file) and in
that folder put folders: app,audio,multicast,ui ,now I must
"insert" python files from shtoom package into that folders but I don't
know where  I must put
every file?? In what folder.



                         I will appreciate any help

                         Regards,Vedran



From __peter__ at web.de  Fri Nov 10 08:55:01 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Nov 2006 14:55:01 +0100
Subject: announce: FAQs suggested
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>
Message-ID: <ej20b4$rjj$02$1@news.t-online.com>

p.lavarre at ieee.org wrote:

> http://effbot.org/pyfaq/suggest.htm has new FAQ's:
> 
> FAQ: How do I ask to exit from a doctest

I don't consider that question /frequently/ /asked/ or that feature
frequently requested. Also, the KeyboardInterrupt approach is a hack. 

> FAQ: How do I say unsigned char in ctypes?
> FAQ: How do I say returns void in ctypes?

That's in the ctypes documentation, where it belongs.

Peter


From NoelByron at gmx.net  Thu Nov  2 03:15:31 2006
From: NoelByron at gmx.net (NoelByron at gmx.net)
Date: 2 Nov 2006 00:15:31 -0800
Subject: Thread priority or keeping a (wx)GUI responsive
Message-ID: <1162455331.152904.17160@k70g2000cwa.googlegroups.com>

I need to do some intense calculations in my application. Those are
done by a third party Python library and consume 100% CPU time for some
seconds. The computations take place in their own thread to keep my GUI
responsive (wxPython in my case).

Everything works fine on a dual core machine. On a single CPU machine,
the computation slows down the whole GUI (better, the whole machine).
The ideal solution in my case would be to give the computation thread a
very low priority. But I fear that is not possible?

Moving the computations to a different process look quite complex since
the result is a large Python data structure. And I fear it would not
solve the problem since I can only influence the priority of a
subprocess on the windows plattform (I refer to the documentation of
the subprocess module).

Another possible solution is to include some idle times
(time.sleep(0.05) or wxYield() or even better with python yields?) in
the algorithm of the computations. Ugly, since I would have to
manipulate a third party library. Could sys.setcheckinterval() help?

Do I miss something? Any help, tips or advice would be appreciated.

Best regards,
Noel



From fredrik at pythonware.com  Fri Nov 10 15:37:58 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 21:37:58 +0100
Subject: Modules, Packages and Developer Confusion. Oh My!
In-Reply-To: <1163190657.792705.55030@m73g2000cwd.googlegroups.com>
References: <1163190657.792705.55030@m73g2000cwd.googlegroups.com>
Message-ID: <ej2nv6$qea$3@sea.gmane.org>

dhable at gmail.com wrote:

> from model import *
> from search import *
> 
> def create_connection():
>   # details are unimportant for this example
> 
> 
> When I try to use the create_connection function in model, I get errors
> when I use it as a global function ( just create_connection()).

importing everything from "model" into "OPS" isn't the same thing as 
importing everything from "OPS" into "model".

</F>



From mnations at gmail.com  Fri Nov 10 18:35:25 2006
From: mnations at gmail.com (Mudcat)
Date: 10 Nov 2006 15:35:25 -0800
Subject: Tkinter: How do I change the actual width of a widget?
Message-ID: <1163201725.520487.176030@i42g2000cwa.googlegroups.com>

I am trying to change the width of a widget based on pixel size and not
on characters. I can't figure out how to do this.

Normally to change to the size of a widget it looks like:

widget.configure(width = x)

However that is in characters, not in pixels. To retrieve the actual
size of a widget, I believe it is done with:

x = widget.winfo_width()

Obviously that value can not be used in the configure statement. Is
there a way to dynamically change the width (and height) of a widget
using the winfo data?

Thanks,
Marc



From zhaoqz at gmail.com  Thu Nov  9 02:52:46 2006
From: zhaoqz at gmail.com (=?gb2312?B?v9XQxLLL?=)
Date: 8 Nov 2006 23:52:46 -0800
Subject: Python to tell what is the IP of my PC
In-Reply-To: <mailman.1956.1163045340.11739.python-list@python.org>
References: <mailman.1956.1163045340.11739.python-list@python.org>
Message-ID: <1163058766.013701.178780@i42g2000cwa.googlegroups.com>

>>> import re,urllib2
>>> re.search('\d+\.\d+\.\d+\.\d+',urllib2.urlopen("http://www.hereismyip.com").read()).group()
'xx.xx.xxx.xxx?


On 11?9?, ??11?06?, Hieu Hoang <dhh... at student.monash.edu>
wrote:
> Hi list,
> I think a script to extract the IP from some websites like
> whatismyip.com could do the job. I don't know how to write it though,
> sure someone can give
> direction on that.
> 
> Cheers,
> Rooy



From http  Sun Nov  5 16:15:10 2006
From: http (Paul Rubin)
Date: 05 Nov 2006 13:15:10 -0800
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
	<1162708081.974808.283370@i42g2000cwa.googlegroups.com>
	<7xy7qql7i7.fsf@ruckus.brouhaha.com>
	<1162747326.717224.236010@i42g2000cwa.googlegroups.com>
Message-ID: <7xmz75ioip.fsf@ruckus.brouhaha.com>

"Mudcat" <mnations at gmail.com> writes:
> > No that would suck.  Best to try to stay as close as possible to the
> > native widgets on whatever the underlying platform is.  If you want
> > to depart from the native UI, then start from scratch and write a whole
> > new window system with a complete app suite etc.
> 
> Ok. But other than thinking it would suck, you're basically repeating
> my point about starting from scratch with a whole new suite of widgets.

No.  In both cases I'm saying stick with a consistent set of widgets
and visual look across all applications.  Either use your OS's
existing widget set and make your apps look like the existing apps for
that OS, or else throw out all those apps and write a whole new set
whose look is new, but is consistent across all of them.  

> Sometimes you want a tool that blends in. Sometimes you want one that
> stands out, especially when you're competing against other tools where
> they all kind of look the same.

This is what I'm saying would suck.  Maybe the standing-out would get
more attention but it's a nuisance for users.


From ynaddaf at riptown.com  Tue Nov  7 17:55:51 2006
From: ynaddaf at riptown.com (deLenn)
Date: 7 Nov 2006 14:55:51 -0800
Subject: Finding Nonzero Elements in a Sparse Matrix
In-Reply-To: <1162939218.006857.100300@h54g2000cwb.googlegroups.com>
References: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>
	<1162939218.006857.100300@h54g2000cwb.googlegroups.com>
Message-ID: <1162940151.208051.125810@k70g2000cwa.googlegroups.com>

Thanks for the reply.

'nonzero' deos not seem to work with sparse matrices. here is an
example:


from scipy import *
A = sparse.lil_matrix((3,3))
A[1,2] = 10
A[2,0] = -10

nonzero(A)
>>> ()


(I tried it with an ordinary matrix, and it works fine)

Cheers.

















Nick Vatamaniuc wrote:
> The function you might want is nonzero() or flatnonzero()
>
> >>> from numpy import *
>
> >>> a=array([ [1,2],[0,4] ])
>
> >>> a
> array([[1, 2],
>            [0, 4]])
>
> >>> flatnonzero(a)
> array([0, 1, 3])
>
> nonzero() will return the a sequence of index arrays of non zero
> elements
> flatnonzero()  returns the non-zero elements of the flattened version
> of the array.
>
> Cheers,
> Nick Vatamaniuc
>
>
>
> deLenn wrote:
> > Hi,
> >
> > Does scipy have an equivalent to Matlab's 'find' function, to list the
> > indices of all nonzero elements in a sparse matrix?
> > 
> > Cheers.



From robert.kern at gmail.com  Sun Nov 26 00:52:19 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 25 Nov 2006 23:52:19 -0600
Subject: About alternatives to Matlab
In-Reply-To: <1164518610.895461.252690@45g2000cws.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>	<mailman.361.1163789556.32031.python-list@python.org>	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>	<1164504562.834005.197830@l39g2000cwd.googlegroups.com>
	<1164518610.895461.252690@45g2000cws.googlegroups.com>
Message-ID: <ekba35$146$1@sea.gmane.org>

Phil Schmidt wrote:
> sturlamolden wrote:
> 
>> Using Python just for the sake of using Python is silly.
> 
> Well, that kind of gets right to my point. Does the "added" effort with
> Python to interface with data acquisition hardware really result in
> less productivity? I am very familiar with Matlab, Labview, and Python,
> and frankly, Python is the most productive and powerful programming
> language of the three. But it's the hardware compatibility thing that
> concerns me with Python.

Without knowing the hardware that you want to use, it's quite difficult for us
to tell you anything useful. Most likely, you're simply going to have to sit
down with a list of the hardware that you want to use, the existing solutions
for interfacing with that hardware (e.g. already written MATLAB, LabView, or
Python extension modules for that hardware), and their costs. You're going to
have to weigh those costs against the cost of using ctypes or something similar
to wrap the raw DLLs if a Python extension module isn't available.

We might be able to help you locate the already-existing Python wrappers for
your hardware, but the rest are judgement calls that only you can make. To make
an accurate judgement, you will probably need to have a little bit of experience
trying to wrap one such raw DLL. If you can't afford the time to do that one
experiment, then you probably have your answer.

-- 
Robert Kern

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



From timr at probo.com  Fri Nov 17 02:16:11 2006
From: timr at probo.com (Tim Roberts)
Date: Fri, 17 Nov 2006 07:16:11 GMT
Subject: how to print pdf with python on a inkjet printer.
References: <mailman.277.1163700699.32031.python-list@python.org>
Message-ID: <h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>

"krishnakant Mane" <researchbase at gmail.com> wrote:
>
>hello all.
>I am developing an ncurses based python application that will require
>to create pdf reports for printing.
>I am not using py--qt or wx python.
>it is a consol based ui application and I need to make a pdf report
>and also send it to a lazer or ink jet printer.
>is it possible to do so with python?

Making the PDF is easy.  Go get ReportLab from www.reportlab.org.  I
consider it the best Python PDF solution.

Printing is more complicated, because you actually need something that can
RENDER the PDF.  The most common such renderer is the Acrobat Reader, and
you can actually call the Acrobat Reader from a command line with a
parameter that tells it to print the file automatically.  The only
disadvantage is that using that method will only print to the "default"
printer.

>or is it that I will have to use the wxpython library asuming that
>there is a print dialog which can open up the list of printers?

Even if you got the list of printers, what would you do with it?
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From srikrishnamohan at gmail.com  Tue Nov 14 08:07:50 2006
From: srikrishnamohan at gmail.com (km)
Date: Tue, 14 Nov 2006 18:37:50 +0530
Subject: __init__.py
In-Reply-To: <ejcco4$ahb$1@sea.gmane.org>
References: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com>
	<ejc8vi$sip$1@sea.gmane.org>
	<f4cc03640611140340q22d7f3e6pb9092148fa890347@mail.gmail.com>
	<ejcco4$ahb$1@sea.gmane.org>
Message-ID: <f4cc03640611140507n59840fd4q9d46abb2d95e51f@mail.gmail.com>

Hi,
wow ! i tried it and it works like charm!
could access  variables  declared at root module dir  in submodules.
also i would like to know if i can have an abstract class declared in
__init__.py  with common variables ?

regards,
KM

On 11/14/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> "km" wrote:
>
> > I have a structure like this :
> > foo/__init__.py
> > foo/bar/__init__.py
> > foo/bar/firstmodule.py
> > foo/abc/__init__.py
> > foo/abc/secondmodule.py
> >
> > now i have some variables (paths to data files) common, to be used in
> > first module and second modules respectively.
> > can i set those variables in foo/__init__.py so that i can access them
> by
> > foo.mypath1 in first and second submodule class definitions?
>
> looks ok to me, as long as you remember to actually import foo into your
> submodules.
>
> have you tried it?
>
> </F>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From dynamicdestroyer at yahoo.de  Wed Nov 15 12:13:59 2006
From: dynamicdestroyer at yahoo.de (Mateuszk87)
Date: 15 Nov 2006 09:13:59 -0800
Subject: Yield
Message-ID: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>

Hi.

may someone explain "yield" function, please. how does it actually work
and when do you use it?

thanks in forward

mateusz



From beliavsky at aol.com  Mon Nov  6 21:20:01 2006
From: beliavsky at aol.com (Beliavsky)
Date: 6 Nov 2006 18:20:01 -0800
Subject: Pyro stability
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
Message-ID: <1162866001.849724.245510@b28g2000cwb.googlegroups.com>

Carl J. Van Arsdall wrote:

<snip>

> Pyro is fucking amazing and has been a great help to a couple of our projects.

You should watch your language in a forum with thousands of readers.



From bearophileHUGS at lycos.com  Thu Nov  2 09:21:10 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Nov 2006 06:21:10 -0800
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
Message-ID: <1162477269.980535.202320@h48g2000cwc.googlegroups.com>

elderic:
> 1.: --> sort of clumsy and discouraged by the docs as far as I read
> import types
> type(f) is types.FunctionType

What's the problem with this?

from types import FunctionType
if isinstance(f, FunctionType):
    ...

Bye,
bearophile



From anthra.norell at vtxmail.ch  Sat Nov  4 03:00:50 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Sat, 04 Nov 2006 09:00:50 +0100
Subject: ANN: SE 2.3. Available now
In-Reply-To: <eig4dk$g9l$1@sea.gmane.org>
References: <454B3B49.6070702@vtxmail.ch>	<454B6FEC.20709@islandtraining.com>	<eifrs9$gb0$1@sea.gmane.org>	<454B8B8D.8010406@vtxmail.ch>
	<eig4dk$g9l$1@sea.gmane.org>
Message-ID: <454C48B2.3090801@vtxmail.ch>

Fredrik Lundh wrote:
> Frederic Rentsch wrote:
>
>   
>> And here's the proof I am being perceived as a nuisance. I apologize, 
>> keeping to myself that I don't care.
>>     
>
> since you're constantly targeting newbies, and are hawking your stuff 
> also for things for which there are simple and efficient solutions 
> available in Python's standard library, your behavior could be seen
> as more than just a nuisance.
>
> </F>
>
>   
Thank you for making me aware of it. I totally agree with you that 
inefficient complexity should never replace efficient simplicity. SE, in 
fact, is much more a convenient interface complement than a stand-alone 
tool and as such meant to cooperate with the available Python idiom.
      I used this forum to connect with real-life problems, which I 
believe is one of its main purposes. Testing the envelope of my 'stuff' 
I would almost certainly have overstretched it on occasion. And again, 
what's wrong with this absolutely normal development process? And what 
better environment could there be for it than an interest group like 
this one where experts like yourself offer direction?
      I am not targeting newbies (whatever that is). I am not targeting 
at all. I invite response. You had cause to respond as this message of 
yours reveals. But you didn't respond and now your are angry with me for it.
      So, thanks again for the information. Your comments are always 
welcome. I understand your style as an expression of your personality. 
Belligerence passes my notice if I don't see what I have to do with it.

Regards

Frederic




From gagsl-py at yahoo.com.ar  Mon Nov 20 20:10:09 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 22:10:09 -0300
Subject: Programmatically replacing an API for another module
In-Reply-To: <5ni4m291t9ctfsgisus67a5q6gv7blvsjj@4ax.com>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<39ednaWIOuxepv_YnZ2dnUVZ_omdnZ2d@comcast.com>
	<5ni4m291t9ctfsgisus67a5q6gv7blvsjj@4ax.com>
Message-ID: <7.0.1.0.0.20061120220424.040e8fd8@yahoo.com.ar>

At Monday 20/11/2006 21:52, Tom Plunket wrote:

>What I ran into after posting is that I don't know how to get the
>__dict__ for the module's scope; is it available?  I.e. I can do
>'print os.path.__dict__', but 'print __dict__' at module scope results
>in a NameError since __dict__ is undefined at that scope.  However, if
>I could do 'os.path = local_module' somehow, I'd be getting basically
>what I want.  Maybe I could just have a my_os_path.py, and in my test
>code import it as os.path, and then the other code would see that
>os.path is already loaded and not bother doing so again?  Haven't
>tried it, am interested in the answer, but I do have enough to work
>with for now...  Replacing a module in this way also ensures that I'm
>only calling the parts of the API that I intend to call, which is a
>handy side-effect.

You can do this:
import my_os_path
os.path = my_os_path

That shows also that you can use the module as its own namespace. No 
need to use __dict__ explicitely. dir(module) gives you the names 
defined in the module. From inside the module self, use globals().


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From john106henry at hotmail.com  Wed Nov  8 14:49:07 2006
From: john106henry at hotmail.com (John Henry)
Date: 8 Nov 2006 11:49:07 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <455226c0$0$17087$c3e8da3@news.astraweb.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
Message-ID: <1163015347.164393.74110@i42g2000cwa.googlegroups.com>


John Salerno wrote:
> Dan Lenski wrote:
>
> > So, is there another toolkit I should be looking at?
>
> I highly recommend wxPython. It's very mature, full-featured, and
> portable, and fairly easy to learn as well. I can't really compare it to
> other toolkits (not having used any of them, except Tkinter), but it's
> definitely one of the most popular and well-supported ones out there.
>
> http://www.wxpython.org/

I highly recommend that you try PythonCard (which sits on top of
wxPython).  You can get productive very very quickly.  Take a look at:

http://pythoncard.sourceforge.net/walkthrough1.html



From Leo.Kislov at gmail.com  Thu Nov  2 21:29:35 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 2 Nov 2006 18:29:35 -0800
Subject: How to test python extension modules during 'make check' / 'make
	distcheck'?
References: <1ho79n0.1ui6ozx1bxjznkN%asbach@ient.rwth-aachen.de>
Message-ID: <1162520975.593351.76880@f16g2000cwb.googlegroups.com>


Mark Asbach wrote:
> Hi pythonians,
>
> I'm one of the maintainers of an open source image processing toolkit
> (OpenCV) and responsible for parts of the autotools setup. The package
> mainly consists of four shared libraries but is accompanied by a python
> package containing some pure python code and of course extension modules
> for the four libraries.
>
> Now during the last month we were preparing a major release which means
> testing, fixing, testing, fixing, ... in the first degree. Typical
> functionality of the shared libraries is verified during 'make check'
> and 'make distcheck' by binaries that are linked against the libraries
> (straight forward) and are listed in the 'TESTS' automake primary.
>
> Unfortunately, many problems with the python wrappers arose from time to
> time. Currently we have to build and install before we can run any
> python-based test routines. When trying to integrate python module
> testing into the automake setup, there are some problems that I couldn't
> find a solution for:
>
> a) the extension modules are built in different (other) subdirectories -
> so they are not in the local path where python could find them

As I understand it's not python that cannot find them but dynamic
linker. On ELF UNIX systems you can set LD_LIBRARY_PATH to help linker
find dependencies, on Windows -- PATH. If you need details, you can
find them in dynamic linker manuals.

> b) the libraries and extension modules are built with libtool and may
> have rpaths compiled in (is this problematic)?

libtools seems to have some knobs to cope with rpath:
http://sourceware.org/ml/bug-glibc/2000-01/msg00058.html

> c) a different version of our wrappers might be installed on the testing
> machine, somewhere in python/site-packages. How can I make sure that
> python only finds my 'new' local generated modules?

Set PYTHONPATH to the directory where locally generated modules are
located. They will be found before site packages.

  -- Leo



From steve at holdenweb.com  Fri Nov 10 13:39:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 12:39:07 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4rhku3FriokeU2@mid.individual.net>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
Message-ID: <ej2gu2$1qc$2@sea.gmane.org>

Bjoern Schliessmann wrote:
> Michael Hobbs wrote:
> 
>> That is, assume that the expression ends at the colon, not at the
>> newline. That would make this type of statement possible:
>>     if color == red or
>>       color == blue or
>>       color == green:
>>         return 'primary'
>> Right now, such a statement would have to be spelled thus:
>>     if color == red or \
>>       color == blue or \
>>       color == green:
>>         return 'primary'
>> or
>>     if (color == red or
>>       color == blue or
>>       color == green):
>>         return 'primary'
> 
> What about
> 
> if color == red or blue or green:
>     return 'primary'
> 
> :)
> 
> Really, I think it'd be more mess to let the if statement's end only
> depend on ":". I think there could arise situations that are messy
> to debug. If I need multiple lines I prefer the parentheses.
> 
I still prefer

   if color in (red, blue, green):
     ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From johnzenger at gmail.com  Sun Nov 26 21:36:27 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 26 Nov 2006 18:36:27 -0800
Subject: Ruby/Python/REXX as a MUCK scripting language
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <1164594987.770839.251450@n67g2000cwd.googlegroups.com>

Have you considered JavaScript Spidermonkey or JavaScript Rhino?
Sandboxing is automatic, and lots of people know the language already
(although fewer people are familiar with its dynamic object-oriented
capabilities).

Tony Belding wrote:
> I'm interested in using an off-the-shelf interpreted language as a
> user-accessible scripting language for a MUCK.  I'm just not sure if I
> can find one that does everything I need.  The MUCK must be able to
> call the interpreter and execute scripts with it, but the interpreter
> must also be able to call functions in the MUCK code.  And then there's
> the security issue that really worries me. . .  I have to be able to
> limit what the interpreter can execute.  I can't have my users running
> scripts that access the console, access the filesystem or sockets
> directly, or call libraries or other binaries outside the MUCK.
>
> Is this practical?  I'm thinking of Ruby or Python for this, if they
> can meet the requirements.
>
> I might even consider REXX. . .  I remember ARexx from my Amiga days,
> and how great it was for string manipulation and application scripting.
>  However. . .  My immediate target platform, Mac OS X, comes with Ruby
> and Python but not REXX, so that's a disadvantage.
>
> My final option would be to create my own language interpeter where I
> have control over everything that happens.  That is what MUCKs have
> always done in the past.  But the result was always quirky, limited
> languages like MUF (Multi-User Forth) which really turn off a lot of
> coders.  Furthermore, I've never created a language before, and it
> would be a lot of extra work for me.
> 
> -- 
> Tony Belding, Hamilton Texas



From nick at craig-wood.com  Wed Nov 29 06:30:06 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 29 Nov 2006 05:30:06 -0600
Subject: Really closing stdout (was: "fork and exit" needed?)
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
	<hr4bh.504$Ib3.364308@news.siol.net>
Message-ID: <slrnemqqpf.hje.nick@irishsea.home.craig-wood.com>

Mitja Trampus <nun at example.com> wrote:
>  Nick Craig-Wood wrote:
> > I'm not sure how you do open stdout to /dev/null in python though!
> > I suspect something like this...
> >   import posix
> >   posix.close(1)
> >   posix.open("/dev/null", posix.O_WRONLY)
> 
>  Yes, you're close enough... The explanations are here:
>  http://www.google.com/search?q=python%20close%20stdout,
>  I like this one in particular:
>  http://www.python.org/infogami-faq/library/why-doesn-t-closing-sys-stdout-stdin-stderr-really-close-it/
> 
>  If you explicitly want to leave file descriptors 0-2 present 
>  (Do you gain anything by not closing them? If you know, do 
>  tell...),

It is traditional I think...

>From the unix FAQ, http://www.erlenstar.demon.co.uk/unix/faq.txt :-

  6. `close()' fds 0, 1, and 2. This releases the standard in, out, and
     error we inherited from our parent process. We have no way of knowing
     where these fds might have been redirected to. Note that many daemons
     use `sysconf()' to determine the limit `_SC_OPEN_MAX'.  `_SC_OPEN_MAX'
     tells you the maximun open files/process. Then in a loop, the daemon
     can close all possible file descriptors. You have to decide if you
     need to do this or not.  If you think that there might be
     file-descriptors open you should close them, since there's a limit on
     number of concurrent file descriptors.

  7. Establish new open descriptors for stdin, stdout and stderr. Even if
     you don't plan to use them, it is still a good idea to have them open.
     The precise handling of these is a matter of taste; if you have a
     logfile, for example, you might wish to open it as stdout or stderr,
     and open `/dev/null' as stdin; alternatively, you could open
     `/dev/console' as stderr and/or stdout, and `/dev/null' as stdin, or
     any other combination that makes sense for your particular daemon.

> but pointing do /dev/null, you could do:
> 
>  null = os.open(os.devnull,os.O_WRONLY)
>  os.dup2(null,0)
>  os.dup2(null,1)
>  os.dup2(null,2)
>  os.close(null)
> 
>  Untested.

Ah, dup2() was on the tip of my mind's tongue ;-)

You could write it like this, and then it even works on Windows!

import os
import sys
import time
print os.getpid()
null = os.open(os.devnull,os.O_RDWR)
os.dup2(null, sys.stdin.fileno())
os.dup2(null, sys.stdout.fileno())
os.dup2(null, sys.stderr.fileno())
os.close(null)
print "You won't see this"
print >>sys.stderr, "Or this"
time.sleep(60)

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


From xi at gamma.dn.ua  Sun Nov 19 09:38:03 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sun, 19 Nov 2006 16:38:03 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <1knc9a9960uon.slnj7e17d24m$.dlg@40tude.net>
References: <mailman.430.1163877551.32031.python-list@python.org>
	<i53421v27yla$.rrj9sefsk84d.dlg@40tude.net>
	<mailman.459.1163944705.32031.python-list@python.org>
	<1knc9a9960uon.slnj7e17d24m$.dlg@40tude.net>
Message-ID: <20061119143803.GC12399@58sirius016.dc.ukrtel.net>

On Sun, Nov 19, 2006 at 03:13:30PM +0100, Alan Franzoni wrote:
> Kirill Simonov  si ? divertito a scrivere:
> 
> > On Sun, Nov 19, 2006 at 12:33:39PM +0100, Alan Franzoni wrote:
>  
> > No, I would prefer the editor to save the .py files with non-ASCII
> > characters in UTF-8 encoding adding the BOM at the beginning of the
> > file. This will allow the interpreted to detect the file encoding
> > correctly and would save a teacher from explaining what an encoding is
> > and why it is needed.
> 
> You'll run into encoding problems anyway in your programmer's life. I don't
> think it's a workaround, try this article:
> 
> http://www.joelonsoftware.com/articles/Unicode.html
> 
> I think it's highly useful, you could tell that to your students.

Please remember that most of the students will not become professional
programmers.  Personally I think that encoding problems are nightmare in
general, and in Python in particular, and would like to avoid explaining
it as longer as possible.  Besides, it won't be me, it will be a teacher
who will explain it, and the teacher themself might have a vague notion
about this topic.

> Eclipse+Pydev seems to work with that. I'm not able to check with other
> editors right now, but it seems you're experiencing a simple encoding
> problem; your editor doesn't know which encoding you'd like to use, so it
> defaults to ascii or iso-8859-1 leading to such problems.

No, my problem is that the emulation of sys.stdin/sys.stdout under
an IDE's interactive console doesn't work like the real
sys.stdin/sys.stdout under a real terminal.


Thanks,
Kirill.


From jm.suresh at gmail.com  Fri Nov  3 01:11:01 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 2 Nov 2006 22:11:01 -0800
Subject: Best way to have intermediate object description format
Message-ID: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>

Hi,
 Is there any standard text format for storing data of object oriented
nature.
 The text file should be readable.

That is, Is there any better way than having to write out a file like
this from the original place and read it in python and process it.

#----------------------------
world = World(name='MyWorld')
world.objects.append(Box(color='red'))
world.objects.append(Circle(color='green'))
world.someProp = "123"
#-----------------------------

Thanks.
Suresh



From gagsl-py at yahoo.com.ar  Thu Nov  9 18:53:51 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 20:53:51 -0300
Subject: Having problems with urlparser concatenation
In-Reply-To: <1163114626.595813.286260@b28g2000cwb.googlegroups.com>
References: <1163114626.595813.286260@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109204327.058fac38@yahoo.com.ar>

At Thursday 9/11/2006 20:23, i80and wrote:

>I'm working on a basic web spider, and I'm having problems with the
>urlparser.
>[...]
>             SpliceStart = Website.find('<a href="', (i+1))
>             SpliceEnd = (Website.find('">', SpliceStart))
>
>             ParsedURL =
>urlparse((Website[SpliceStart+9:(SpliceEnd+1)]))
>             robotparser.set_url(ParsedURL.hostname + '/' +
>'robots.txt')
>-----
>Traceback (most recent call last):
>   File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
>line 120, in <module>
>     FindLinks(Website)
>   File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
>line 84, in FindLinks
>     robotparser.read()
>   File "C:\Program Files\Python25\lib\robotparser.py", line 61, in read
>     f = opener.open(self.url)
>   File "C:\Program Files\Python25\lib\urllib.py", line 190, in open
>     return getattr(self, name)(url)
>   File "C:\Program Files\Python25\lib\urllib.py", line 451, in
>open_file
>     return self.open_local_file(url)
>   File "C:\Program Files\Python25\lib\urllib.py", line 465, in
>open_local_file
>     raise IOError(e.errno, e.strerror, e.filename)
>IOError: [Errno 2] The system cannot find the path specified:
>'en.wikipedia.org\\robots.txt'
>
>Note the last line 'en.wikipedia.org\\robots.txt'.  I want
>'en.wikipedia.org/robots.txt'!  What am I doing wrong?

No, you don't want 'en.wikipedia.org/robots.txt'; you want 
'http://en.wikipedia.org/robots.txt'
urllib treats the former as a file: request, here the \\ in the 
normalized path.
You are parsing the link and then building a new URI using ONLY the 
hostname part; that's wrong. Use urljoin(ParsedURL, '/robots.txt') instead.

You may try Beautiful Soup for a better HTML parsing.

-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From paolopantaleo at gmail.com  Mon Nov  6 08:03:54 2006
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Mon, 6 Nov 2006 14:03:54 +0100
Subject: Building C extensions
Message-ID: <83e8215e0611060503w123eb1cat56f5e086d2b8d2d@mail.gmail.com>

Well I'm just courious: if I want to buid a C extension, I shoul use
the same compiler that has been used to build python (right?). Since
python has been built using Visual C, how can I build an extension if
I don't have Visual Studio?

PAolo


From robert.kern at gmail.com  Thu Nov  2 13:46:37 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 02 Nov 2006 10:46:37 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162491753.605134.162700@i42g2000cwa.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<mailman.1677.1162490601.11739.python-list@python.org>
	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>
Message-ID: <eideec$tk8$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> Robert Kern:
>> We distribute mingw set up to do this with our "Enthought
>> Edition" Python distribution.
>> http://code.enthought.com/enthon/
> 
> Sorry, maybe I'm blind but I don't see MinGW listed in that page...
> Maybe it's included but not listed...

It's there.

-- 
Robert Kern

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



From inq1ltd at verizon.net  Fri Nov 24 16:56:58 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 24 Nov 2006 16:56:58 -0500
Subject: Access to variable from external imported module
In-Reply-To: <1164393677.496060.174120@f16g2000cwb.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.685.1164390261.32031.python-list@python.org>
	<1164393677.496060.174120@f16g2000cwb.googlegroups.com>
Message-ID: <0J99003UJ88QKFR0@vms048.mailsrvcs.net>

On Friday 24 November 2006 13:41, John Machin 
wrote:
> jim-on-linux wrote:
> > On Friday 24 November 2006 03:30, John Machin
> >
> > wrote:
> > > jim-on-linux wrote:
> > > > GinTon,
> > > >
> > > > I think this is what you want.
> > > >
> > > >
> > > > class Kdoi:
> > >
> > > Is that a typo?
> >
> >        No, it's a style. life seems to be
> > easier to me if one is consistent, all my
> > classes begin with K.
>
> and end with "i"?
>
> > > >    def __init__(self) :
> > > >        self.Fdo()
> > >
> > > What is all this K and F stuff?
> >
> >    It's my style. life seems to be easier  to
> > me if one is consistent all my function begin
> > with F.
>
> You left out a word; the correct way of
> phrasing that is: "All my function _are_ begin
> with F" :-)

No, for Non-Hungrian programmers it's "all-ah me" 
Functions gona begin witha F, not Func. anda 
"all-ah-me" classes gona begin witha K, not Klas.
Anda only me gona Know the Fdiff cause me codea is 
not opena. Anda I finda that it savea me time 
causea I doa thisa way fora a longa time.

Whena I gonna hava to changea maybe I willa.
 
>
> This appears to be a variation on "Hungarian
> notation"; google that for opinions pro & con.
>
> In a certain vernacular, it would be called "an
> effed concept" :-)
>
> > I started doing things like this when the
> > only way to debug was to read each line of
> > code and try to figgure out if it was the
> > problem.
>
> When was that?
That was when bill gates just left Harvard,
basic was brand new, and 4k of memory was 
installed free when you bought a computer, 
(TRS80), my first,. Assemble was the alternative 
to Basic and you had to backup on tape because 
floppies didn't exist. And, most people on this 
site wern't even a gleem in their fathers eye.

> Even years ago, there were 
> slightly better ways. For example, my first
> boss' boss was an enthusiastic coder and
> debugger and also a workaholic. Colleagues who
> lived along the same railway line as he and
> were foolish enough not to hide behind a
> newspaper could have their morning or evening
> reverie disturbed by a cry of "Glad you're
> here! I'll hold the listing, you hold the
> dump!". I get the impression that debugging
> techniques have moved along a little bit since
> then. :-)
>
> > They are my personal sign posts.
> >
> > > >    def Fdo(self):
> > > >
> > > >
> > > >      searchterm = 'help'
> > > >      print searchterm     #local
> > > >
> > > >      self.searchterm = searchterm
> > > >      print self.searchterm #used inside
> > > > the class
> > > >
> > > >      Kdo.searchterm = searchterm   #<<<<
> > > >      print Kdo.searchterm #used outside
> > > > the class Kdomore()
> > > >
> > > >
> > > >
> > > > class Kdomore(Kdo):
> > > >      def __init__(self) :
> > > >          self.Fdomore()
> > > >
> > > >      def Fdomore(self):
> > > >          searchterm =  Kdo.searchterm   #
> > > > <<<< print searchterm
> > >
> > > It's not apparent what the print statements
> > > are for -- are they part of an attempt to
> > > debug your code?
> >
> > print shows the results wherever a print
> > statement turns up the results = 'help' .
> > I didn't run the code, and it has it has a
> > coding error
>
> I noticed.
>
> > but if removed, the results should be;
> >
> >    searchterm = 'help'
> >    self.searchterm = 'help'
> >    Kdo.searchterm = 'help'

Correct but when writing one must be clear.

Would it be better for me to write, your question
above was Is that a typo?

Or is it better if I were to write, your 
question above, "Is that a typo?", 
is a legimate question, but not clear.

So, to be clear one might write is "Kdoi" 
correct?. 

A clear response would be, it is not "Kdoi", it is 
"Kdo".  

But that's not correct either, it is Kdo.  

If one runs the code I don't expect the user to 
look for "help", I think we will see help and 
will THINK that the results are correct.

THINK is also incorrect, it should be written. 
think, or should it?

 
> No, the result would be
> help
> help
> help
>
> Plug in a text-to-speech module and a phone
> dialer and you're done ;-)
>
> >    Sound silly but many people have trouble
> > with getting a variable from here to there in
> > their code. This shows that it can be done
> >
> > > What gives you the idea that this is what
> > > the OP wants or needs?
> >
> > If I remember right,  he refrased  his first
> > question and asked a second one.
> > Sometimes people don't take the time to write
> > correctly, the questions that are really in
> > their mind. So I guessed.  If Im wrong, he
> > will ignore it.  If I'm right, he will use
> > it.
>
> With luck. Kindly consider another possibility:
> that you are wrong (or just marching to the
> beat of your own tambourine) and he (or she) is
> a newbie & will use it :-)
>

"Because he being of course judge of that tendency 
will make his opinions the rule of judgment, and 
approve or condemn the sentiments of others only 
as they shall square with or differ from his own?"
Thomas Jefferson



I enjoied this, but time is money,

jim-on-linux
http://www.inqvista.com










From paul.keating at nibc.com  Fri Nov 10 09:59:28 2006
From: paul.keating at nibc.com (paul.keating at nibc.com)
Date: 10 Nov 2006 06:59:28 -0800
Subject: Need help with Subversion bindings
Message-ID: <1163170768.284700.95640@e3g2000cwe.googlegroups.com>

I'm trying to write a basic Subversion client because I need to
integrate Subversion with a product that keeps source code in a
database (so it has no notion of "working copy").

I have tried to translate the simple C examples in Garrett Rooney's
book into Python, but the very clever SWIG stuff has made the Python
access so different from the corresponding C that I can't do it.

Example: I can create an apr array but I have no idea how to insert
something into it. In C you use APR_ARRAY_PUSH. In Python that doesn't
exist. Another example: I can create an apr hash, but I can't work out
how to look inside it. In C it is a struct with members count and max
etc. In Python it is a class  that doesn't remotely resemble the
struct.

Has anyone got a bare-bones bit of working Python that shows how to do
(say) an add or a checkout? There is an example of status in the
Subversion book but it's a toy: it doesn't show how you create an
authentication callback so it will only work locally.



From horpner at yahoo.com  Fri Nov 10 15:02:04 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 21:02:04 +0100
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>
	<pan.2006.10.23.10.15.24.383843@gmx.net>
	<1163120577.369133.279080@h48g2000cwc.googlegroups.com>
	<slrnel8v1a.1r8.horpner@FIAD06.norwich.edu>
	<mailman.2049.1163183058.11739.python-list@python.org>
Message-ID: <slrnel9mnm.jk.horpner@FIAD06.norwich.edu>

On 2006-11-10, Steve Holden <steve at holdenweb.com> wrote:
>>> But I don't insist on my PEP. The example just shows just
>>> another pitfall with Unicode and why I'll advise to any
>>> beginner: Never write text constants that contain non-ascii
>>> chars as simple strings, always make them Unicode strings by
>>> prepending the "u".
>> 
>> That doesn't do any good if you aren't writing them in unicode
>> code points, though.
>
> You tell the interpreter what encoding your source code is in.
> It then knows precisely how to decode your string literals into
> Unicode. How do you write things in "Unicode code points"?

for = u"f\xfcr"

-- 
Neil Cerutti


From sp1d3rx at gmail.com  Thu Nov 30 19:19:36 2006
From: sp1d3rx at gmail.com (sp1d3rx at gmail.com)
Date: 30 Nov 2006 16:19:36 -0800
Subject: XML blooming
In-Reply-To: <1164864927.746788.125390@j44g2000cwa.googlegroups.com>
References: <1164864927.746788.125390@j44g2000cwa.googlegroups.com>
Message-ID: <1164932375.975244.60460@l12g2000cwl.googlegroups.com>

Concerning #2, Microsoft has released a tool for XSD Inference. It
can't generate the exact XSD file, but it can guess what it was...

http://download.microsoft.com/download/8/0/f/80fca9f1-292e-4b50-b512-ccf004d4b58e/xsdinference.exe

Paddy wrote:
> (That is bloom as in http://www.wmhelp.com/xmlpad2.htm ;-)
>
> Suddenly, OK, over a number of months, our design environment at work
> has sprouted a wealth of XML configuration files, DTD's etc. The time
> has come when I need to loose my XML cherry.
> So , I guess I need to learn Elementtree.
>
> In supporting our design environment I think I will need
>  1) An editor that can read in a DTD or XML Schema Definition, (XSD),
> as well as an XML file, and help me to write conforming XML.
>  2) A tool to extract an XSD from XML examples.
>
> Hmm, I'm also thinking about a Python project along the lines of
> something that could translate between the world of the Traits package
> (http://code.enthought.com/traits/), and XSD/DTD/XML. Has anyone done
> this before? 
> 
> Thanks in advance, Paddy.



From dlenski at gmail.com  Thu Nov  9 19:06:37 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 16:06:37 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.2006.1163116625.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org>
	<mailman.2006.1163116625.11739.python-list@python.org>
Message-ID: <1163117197.206946.159890@i42g2000cwa.googlegroups.com>

Ben Finney wrote:
> > I think the colon could be omitted from every type of compound
> > statement: 'if', 'for', 'def', 'class', whatever. Am I missing
> > anything?
>
> A use case. What problem is being solved by introducing this
> inconsistency?

I agree completely.  And as a recent convert to Python, I have to say
that I *like* the colons.  I found the whitespace-and-colon thing
really irritating... for about 2 hours.

The colon makes it easier to eyeball where a block statement begins in
the absence of braces around the block, it allows one-line if
statements (which I use a lot), and it means that even the stupidest,
simplest editor can figure out where auto-indentation is needed, namely
following any line that ends with a colon (except in a triple-quoted, I
guess).

Contrast that with Perl, where in years of professional and hobby use I
have not found a single editor that gets indentation right more than
about 90% of the time.  The syntax is too darn complicated.  With
Python, figuring out where to auto-indent is trivial.  Works for me.

Dan



From fredrik at pythonware.com  Sat Nov  4 08:37:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 04 Nov 2006 14:37:50 +0100
Subject: py2exe questions
In-Reply-To: <1162646535.744282.95290@m7g2000cwm.googlegroups.com>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>	<454BB574.9030607@websafe.com>	<mailman.1742.1162594159.11739.python-list@python.org>	<eii0i8$82i$1@news.albasani.net>
	<1162646535.744282.95290@m7g2000cwm.googlegroups.com>
Message-ID: <eii53e$fek$1@sea.gmane.org>

Jerry wrote:

> Despite what everyone is saying though, I believe that any and all
> solutions will require that the byte-code be extracted to some
> directory before being run.

the Python interpreter doesn't really care what you believe, though; 
it's perfectly capable of executing byte code that's stored in memory
buffers.

</F>



From larry.bates at websafe.com  Tue Nov 21 10:05:51 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 21 Nov 2006 09:05:51 -0600
Subject: Programmatically replacing an API for another module
In-Reply-To: <5ni4m291t9ctfsgisus67a5q6gv7blvsjj@4ax.com>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<39ednaWIOuxepv_YnZ2dnUVZ_omdnZ2d@comcast.com>
	<5ni4m291t9ctfsgisus67a5q6gv7blvsjj@4ax.com>
Message-ID: <456315CF.8070705@websafe.com>

> Depends on what all I'm mocking.  If I'm mocking an expensive service
> across the internet that is time consuming to connect to, or even
> mocking a well-defined system API call that is similarly time
> consuming to call, then I can stub something in that doesn't do
> anything but validate the arguments.  Additionally, I can "document"
> the caveats and possibly-errant behavior with my mock, and
> subsequently get automatic testing that I'm dealing with API bugs
> properly.

When I find myself doing what you describe, I often introduce
a "testing" mode switch into the equation.  It is normally a
keyword argument to functions that I then interrogate in the
function.  If I'm running in testing mode, I execute the less
"expensive" testing code.  If I'm not in test mode, I don't.
There may be better ways, but this has worked well for me.

-Larry


From scbauer at gmail.com  Wed Nov 22 19:04:51 2006
From: scbauer at gmail.com (scbauer)
Date: 22 Nov 2006 16:04:51 -0800
Subject: AVL Balancing
In-Reply-To: <1164158188.787394.25990@b28g2000cwb.googlegroups.com>
References: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
	<1164158188.787394.25990@b28g2000cwb.googlegroups.com>
Message-ID: <1164240291.176865.82670@l39g2000cwd.googlegroups.com>


John Machin wrote:
> scba... at gmail.com wrote:
> > Im working on an AVL tree
>
> Is this homework?
Yes, this is homework.

>
> > that consists of balancing the tree everytime
> > you add an object.
>
> That's a peculiar kind of AVL tree. Normally it is *not* necessary to
> balance the tree every time a node is added -- it's done only if a
> constraint is breached.

You're right the AVL Tree shouldnt be updated everytime.

>
> > Im not quite grasping the concept on how to do this
> > with python.
>
> Could you do it in any other language?
No, this is an Advanced Algorithms class  have to use python

>
> > I have seen a few topics on the web about this, and i
> > clearly understand how when the balance of an AVL tree get to 2 or -2
> > you have to do a R, L, LR, or a RL rotation. Could anyone possibly help
> > me/point me in the right direction as far as checking the balance and
> > actually balancing the tree? Thanks in advance
>
class AVLTree:
    """Holds operations of tree"""
    def __init__(self):

        self.__root = None
        self.__stack=[]
        stack = self.__stack

   def addNode(self, data):
        """ Add node for tree"""
        return Node(data)

    def insert(self, data):
        if self.__root == None:
            self.__root = Node(data)
        else:
            current = self.__root
            done = False
            while not done:
                if data < current.get_data():
                    if current.left == None:
                        current.left = Node(data)
                        stack.append(current)

                        done = True
                    else:
                        current = current.left
                else:
                    if current.right == None:
                        current.right = Node(data)
                        stack.append(current)

                        done = True
                    else:
                        current = current.right

> Perhaps if you could show us what you have done already -- I'd be
> expecting a class to represent a node, and maybe another to represent
> the root of the tree -- and give us an idea of your Python proficency
> level (so that we can tailor the advice accordingly), we could help
> you.

Basically what im trying to do is use a stack to keep track of the
items in the AVL tree so that rotations will go smoothly. Having
problems with the stack getting initialized and actually storing the
data there. So that i can reference the elements stack[-3].left =
stack[-2].right and so on for balancing.
 
thanks
scbauer



From no-spam at no-spam-no-spam.invalid  Thu Nov 16 10:05:55 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 16 Nov 2006 16:05:55 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <Y7idna2l5tQXIcTYRVnzvA@telenor.com>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
	<7vCdnSqE260grc7YRVnzvQ@telenor.com>
	<eivuh3$tk2$1@news.albasani.net>
	<Y7idna2l5tQXIcTYRVnzvA@telenor.com>
Message-ID: <ejhuom$gi4$1@news.albasani.net>

Svein Seldal wrote:

You seem to use the functions in very rude manner - wanting to force the GIL around at lowest level. 
Better forget the word GIL and think about acquiring and releasing Threads. 
For each thread wanting to execute Python stuff there has to be a thread state (ts). And then you have to enter/leave for executing Python by using the thread state.


PyEval_InitThreads  enters Python (incl. the GIL) first time.
To let Python free in main thread do 
ts=PyEval_SaveThread()    // or more easy: Py_BEGIN_ALLOW_THREADS 

to reenter Python do simply: 

PyEval_RestoreThread(ts)  // or: Py_END_ALLOW_THREADS 

Forget all the low level PyGIL... functions.

when you really want another c thread to enter Python first time with no thread state existing through Python itsel (better make the thread in Python with thread.start_new ?), then you have to do once

ts_cthread = PyThreadState_New(interp)

then enter Python in this thread:

PyEval_AcquireThread( ts_cthread ) 

to leave again:

PyEval_ReleaseThread( ts_cthread ) 


If you just loop the call_py_function_send() mainly in this thread  you  probably better create the thread at all in Python and make the loop there. You probably stick too much to C-level at any price :-)   Probably you just do a PyRun_xxxx in main thread and then everything else in Python, and expose C-parts for the thread-loop to Python as function (in other_py_inits) - where in the c-function you probably have the usual Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS  bracket during time consuming/system/reenter-endangered message stuff.


Robert





> I think I've found the bug, but I need to confirm this behavior.
> 
> My findings is that if you use PyEval_InitThreads(), it is crucial to 
> release the GIL with PyEval_ReleaseThread() afterwards.
> 
> The API docs states that you can release the GIL with 
> PyEval_ReleaseLock() or PyEval_ReleaseThread() AFAICS. 
> http://docs.python.org/api/threads.html under docs of void 
> PyEval_InitThreads().
> 
> However, if I do use PyEval_ReleaseLock() it will crash shortly after 
> with "Fatal Python error: ceval: tstate mix-up" in a multithreaded C 
> environment.
> 
> If I use PyEval_ReleaseThread() to release the GIL, my app seems stable. 
> I release the GIL like this:
> 
>     PyThreadState *pts = PyGILState_GetThisThreadState();
>     PyEval_ReleaseThread(pts);
> 
> Now, is this a feature or expected behavior in python (i.e. unclear API 
> documentation), or is this a bug in python itself?
> 
> 
> Regards,
> Svein
> 
> 
> PS:
> 
> For reference I did something like this in pseudo-code:
> 
>     Py_Initialize();
>     PyEval_InitThreads();
> 
>     other_py_inits();   // Load py modules, etc.
> 
>     PyEval_ReleaseLock();    // <-- MAKES THE APP UNSTABLE
> 
>     create_c_thread();
> 
>     PyGILState_STATE gstate;
>     gstate = PyGILState_Ensure();
> 
>     call_py_function_main();  // Py main() wont return
> 
>     PyGILState_Release(gstate);
> 
> 
> And the "main" of the C thread function looks like this:
>    while(1)
>    {
>         PyGILState_STATE gstate;
>         gstate = PyGILState_Ensure();
> 
>         call_py_function_send();
> 
>         PyGILState_Release(gstate);
>    }


From paul at boddie.org.uk  Thu Nov 16 04:59:52 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 01:59:52 -0800
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
Message-ID: <1163671192.876928.35960@f16g2000cwb.googlegroups.com>

Stefan Behnel wrote:
>

[Remove an element, remove following nodes]

> Yes, it is. Just look at the API. It's an attribute of an Element, isn't it?
> What other API do you know where removing an element from a data structure
> leaves part of the element behind?

I guess it depends on what you regard an element to be...

[...]

> IMHO, DOM has a pretty significant mismatch with Python.

...in the DOM or otherwise:

http://www.w3.org/TR/2006/REC-xml-20060816/#sec-logical-struct

Paul



From 120psi at gmail.com  Fri Nov 24 03:11:09 2006
From: 120psi at gmail.com (120psi at gmail.com)
Date: 24 Nov 2006 00:11:09 -0800
Subject: Local variables persist in functions?
Message-ID: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>

I'm a bit baffled.  Here is a bit of fairly straightforward code:

def _chunkify( l, chunkSize, _curList = list() ):
    print _curList   # yay for printf debugging
    if len( l ) <= chunkSize:
        _curList.append( l )
    else:
        newChunk = l[:chunkSize]
        _curList.append( newChunk )
        _chunkify( l[chunkSize:], chunkSize, _curList )
    return _curList

_chunkify simply breaks a sequence into a sequence of smaller lists of
size <= chunkSize.  The first call works fine, but if I call it
multiple times, weirdness happens.

chunks = _chunkify( list, size )   # _curList keeps its previous value!
chunks = _chunkify( list, size, list() )    # this works as expected

Considering the default value of _curList, these statements should be
identical.  Any pointers?  Did I miss something in the python reference
manual?  (running 2.4.3, fyi)

Thanks,
Nils



From st at tobiah.org  Thu Nov  2 14:00:00 2006
From: st at tobiah.org (tobiah)
Date: Thu, 02 Nov 2006 11:00:00 -0800
Subject: Creating db front end or middleware.
Message-ID: <454a3347$0$12193$88260bb3@free.teranews.com>

Let's say I want to write a new tool to do
something to, or report on people in a database.
Each tool is going to have to have all sorts of
routines that know about the relationship between
the data.  The first thought is to write a library
of routines that do things like, change_address(),
or fire_employee() or whatever.  

Whoops, now we've decided to move to python.  I
have to write all of that again.

So I thought, shouldn't there be a cloud that sits
in front of the database to which I can ask these
services of?  Some process that awaits requests for
information, or handles new incoming data.  Now new
apps written in any language should be able to use 
a basic protocol in order to get the work done.

The question then, is what the best way to do this is.
First I thought of using cherrypy to sit and listen to
POST requests, but this would make passing complex structures
extremely inconvenient.  Then I thought about WSDL.
Would this be the next logical step, or is this more for
allowing different companies to communicate with each other
when there needs to be a broadcast description of the interface?

If it is to be WSDL, what is a good place to get
concise information as to how to set this up?  It
would be written in python.

Thanks,

Tobiah

-- 
Posted via a free Usenet account from http://www.teranews.com



From harry.g.george at boeing.com  Wed Nov 15 17:15:54 2006
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 15 Nov 2006 22:15:54 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <xqxy7qcz78l.fsf@cola3.ca.boeing.com>

"walterbyrd" <walterbyrd at iname.com> writes:

> Some think it will.
> 
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
> 
> IMO: it won't make much difference. But I don't really know.
> 

Short answer: People use Python instead of Java because people (at
least intelligent people) tend to avoid pain.

Long answer: Changing licenses doesn't magically change Java's
architecture.  It is still a closed world of reinvent-the-wheel,
my-way-or-the-highway.  Which is antithetical to Python's promiscuous
interface-with-anything approach.

-- 
Harry George
PLM Engineering Architecture


From bignose+hates-spam at benfinney.id.au  Thu Nov 23 17:39:10 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 24 Nov 2006 09:39:10 +1100
Subject: sys.stderr.write and sys.exit
References: <1164278785.075748.220690@j44g2000cwa.googlegroups.com>
Message-ID: <87hcwpvldd.fsf@benfinney.id.au>

"GinTon" <jonas.esp at googlemail.com> writes:

> Is the same use _sys.stderr.write('error message'); sys.exit(1)_
> than _sys.exit('error message')_ ?

(Note: The underscore '_' is a valid character in Python code, so I
was quite confused by what you wrote and had to read it several times
to see that you were intending the underscores not to be part of the
code. Better to show a line of code on its own line in your message.)

Code that wants to catch SystemExit will get a different exception
object in each case::

    >>> import sys
    >>> from StringIO import StringIO
    >>> sys.stderr = StringIO()

    >>> try:
    ...     sys.stderr.write('error message')
    ...     sys.exit(1)
    ... except SystemExit, e:
    ...     print "stderr contains:", sys.stderr.getvalue()
    ...     print "e.code is:", e.code
    ...
    stderr contains: error message
    e.code is: 1

    >>> try:
    ...     sys.exit('error message')
    ... except SystemExit, e:
    ...     print "stderr contains:", sys.stderr.getvalue()
    ...     print "e.code is:", e.code
    ...
    stderr contains: error message
    e.code is: error message

I quite often catch SystemExit in unit tests, or other code that is
inspecting a program module.

-- 
 \      "I have a large seashell collection, which I keep scattered on |
  `\        the beaches all over the world. Maybe you've seen it."  -- |
_o__)                                                    Steven Wright |
Ben Finney



From johnjsal at NOSPAMgmail.com  Wed Nov  8 13:21:39 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 13:21:39 -0500
Subject: is this the right way to do subclasses?
Message-ID: <45522074$0$17101$c3e8da3@news.astraweb.com>

Ok, back to my so-called "game." I'm just curious if I've implemented 
the subclasses properly, because it seems like an awful lot of 
repetition with the parameters. And again, if I want to add a new 
attribute later, I'd have to change a lot of things. I can't help but 
get the feeling that I'm doing something very inefficiently.

Thanks!



class Character(object):

     def __init__(self, name, strength, dexterity, intelligence):
         self.name = name
         self.health = 10
         self.strength = strength
         self.dexterity = dexterity
         self.intelligence = intelligence


class Fighter(Character):

     def __init__(self, name, strength, dexterity, intelligence):
         Character.__init__(self, name, strength, dexterity, intelligence)
         self.health += 2
         self.strength += 1


class Thief(Character):

     def __init__(self, name, strength, dexterity, intelligence):
         Character.__init__(self, name, strength, dexterity, intelligence)
         self.health += 1
         self.dexterity += 1


class Mage(Character):

     def __init__(self, name, strength, dexterity, intelligence):
         Character.__init__(self, name, strength, dexterity, intelligence)
         self.intelligence += 1


From nick at craig-wood.com  Sat Nov  4 05:30:09 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 04 Nov 2006 04:30:09 -0600
Subject: Sorted and reversed on huge dict ?
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
	<7xirhwi438.fsf@ruckus.brouhaha.com>
Message-ID: <slrnekopjh.10a.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
> > is there a good way to know how much ram is used directly from
> > python (or should i rely on 'top' and other unix command?
> 
>  I think try resource.getrusage()

That should work (under BSD anyway) but unfortunately doesn't under
linux :-(

>From the man page

   CONFORMING TO
       SVr4,  4.3BSD.   POSIX.1-2001 specifies getrusage(), but only specifies
       the fields ru_utime and ru_stime.

and

       The  above struct was taken from 4.3BSD Reno.  Not all fields are mean-
       ingful under Linux.  In linux 2.4 only the fields  ru_utime,  ru_stime,
       ru_minflt, and ru_majflt are maintained.  Since Linux 2.6, ru_nvcsw and
       ru_nivcsw are also maintained.

Ie none of the memory based ones are filled in.

This linux only code works though :-

   def memory_used():
       """Return the memory used by this process under linux in bytes"""
       return int(file("/proc/self/statm").read().split()[0]) * resource.getpagesize()

Eg

>>> import resource
>>> def memory_used():
...     return int(file("/proc/self/statm").read().split()[0]) * resource.getpagesize()
... 
>>> print memory_used()
4575232
>>> a=10000000*"x"
>>> print memory_used()
14577664
>>> 

If anyone knows a (unix) portable way of doing this I'd be interested!

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


From rtw at freenet.co.uk  Mon Nov 27 15:26:11 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 27 Nov 2006 14:26:11 -0600
Subject: super() and type()
References: <mailman.777.1164653627.32031.python-list@python.org>
Message-ID: <Xns9888CFE7B177DrtwfreenetREMOVEcouk@216.196.109.145>

Chris Mellon wrote in
news:mailman.777.1164653627.32031.python-list at python.org in
comp.lang.python: 

> I see super documented, and in use, as below (from the Python
> documentation) 
> 
> class C(B):
>     def meth(self, arg):
>         super(C, self).meth(arg)
> 
> I'd like to not write C all the time, so is there any problem with
> writing: 
> 
> class C(B):
>     def meth(self, arg):
>         super(type(self), self).meth(arg)
> 
> 
> This seems to work in practice but I don't see it used anywhere and
> I'm worried what I might be missing.

Have you considered what happens if somebody writes:

class D(C):
  def meth(self, arg):
    super( D, self ).meth( arg )

> 
> This was especially brought to my attention because pylint flags the
> second usage as invalid, and I'm not sure if it should be considered a
> false positive or not.

Nope, the type argument to super tells it where you are in the 
type hierarchy, type(self) is always the top of the hierarchy.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From fredrik at pythonware.com  Wed Nov 29 02:18:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 08:18:21 +0100
Subject: Python program that validates an url against w3c markup validator
In-Reply-To: <ekjb38$t66$1@sea.gmane.org>
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
	<ekjb38$t66$1@sea.gmane.org>
Message-ID: <ekjc7s$vmg$1@sea.gmane.org>

Fredrik Lundh wrote:

>  >>> f = urllib.urlopen("http://validator.w3.org/check?uri=" + uri)
>  >>> print f.headers

here's the specification, btw:

     http://validator.w3.org/docs/api.html

</F>



From fd0man at gmail.com  Sat Nov 11 20:23:24 2006
From: fd0man at gmail.com (Michael B. Trausch)
Date: Sat, 11 Nov 2006 20:23:24 -0500
Subject: Decimal() instead of float?
Message-ID: <1163294604.4675.4.camel@pepper>

Is there a way to use Decimal() by default in Python instead of float?
I've no use for the float type, and I have some stuff that would require
Decimal(), but it is kind of a pain to try and cast things all over the
place all the time.  Float is just way too inexact for me.

I am searching around, and I don't see anything helpful, but I could (as
always) be missing something... I tried (rather na?vely) to just do
something like:

>>> import decimal
>>> float=Decimal
>>> x=1.1
>>> x
1.1000000000000001
>>> 

But, that didn't work (obviously).  It was a shot, anyway.  Are there
any ideas, or does anyone have a way around this?  I would prefer to not
have to convert incoming floating point numbers to strings and then
convert them to Decimal() types every single time that I want to use
them (which would be in *every* case).  For example, I have a ZIP code
database that can do some processing on its numbers, and the numbers are
stored as floating point values (exactly) but Python doesn't get them
right; so the Decimal() thing would be needed.  *shrugs*

    Thanks a bunch,
    Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
   Jabber IM: fd0man at livejournal.com

Demand Freedom!  Use open and free protocols, standards, and software!
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From no-spam at no-spam-no-spam.invalid  Thu Nov  9 14:11:29 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 09 Nov 2006 20:11:29 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <7vCdnSqE260grc7YRVnzvQ@telenor.com>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
	<7vCdnSqE260grc7YRVnzvQ@telenor.com>
Message-ID: <eivuh3$tk2$1@news.albasani.net>

Svein Seldal wrote:
> robert wrote:
>> PyGILState_Ensure/Release guarantees to establish the GIL - even if it 
>> was already held (useful if you deal with complex call 
>> ordering/dependencies)
> 
> I understand this to mean that I dont need to explicitly lock the GIL 
> (with PyEval_AcquireLock() or PyEval_AcquireThread()).
> 
> Well I cant figure out the PyGILState_Ensure() because if I only use 
> this function to establish the GIL, when calling python, python will 
> shortly after crash with "Fatal Python error: ceval: tstate mix-up". 
> This happens consistently when the main app and the extra thread has 
> called python and both are busy executing python code.

Do did't tell enough to see what you want to do on the big picture.

usually you create a thread through Python.
If you boot Python at all from C you have to do 
PyEval_InitThreads 
or maybe more simple use the high level layer PyRun_...

If you boot a new Python thread manually or a separated interpreter (with separated module state) from outside 
the you have to also do:

(PyInterpreterState* PyInterpreterState_New() ) 
PyThreadState* PyThreadState_New( PyInterpreterState *interp) 
void PyEval_AcquireThread( PyThreadState *tstate) 


If you are already in a Python thread but don't for some reason not know the current thread state:
PyThreadState* PyThreadState_Get( ) 
but usually you release with PyThreadState* PyEval_SaveThread( ) / Py_BEGIN_ALLOW_THREADS 



>> PyObject_CallObject(...)     calls Python code. Thus the interpreter 
>> will switch and do as usuall during that.
> 
> BTW What do you mean by switch?

the automatic scheduling every sys.getcheckinterval() etc.. you mentioned
You'd only have to take care for that, if your C-code does things (e.g. calling python basic funcs) for a long time and doesn't release the lock with Py_BEGIN_ALLOW_THREADS ...

> The main problem is that not done this way, it's the other way around. 
> My main C app will call a python function which will be a lengthy time 
> consuming process.
> 
> The main C app will call python and it will never return from 
> PyObject_CallObject(...), while the extra thread should call a py 
> function to deliver occational messages into C.

Maybe simply boot Python in the main thread (Py_Initialize( )) and run off Python possibly as simple as PyRun_String 
and let Python do thread.start_new(...)
You'd not have to worry much about states.

( and later you'd probably even more simple do "python myapp.py"  and expose your C app as extension module :-) )


-robert




From steve at REMOVE.THIS.cybersource.com.au  Thu Nov 16 17:27:12 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 17 Nov 2006 09:27:12 +1100
Subject: Question about unreasonable slowness
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.16.22.27.11.585491@REMOVE.THIS.cybersource.com.au>

On Thu, 16 Nov 2006 12:45:18 -0800, allenjo5 wrote:

> [ Warning: I'm new to Python.  Don't know it at all really yet, but had
> to examine some 3rd party code because of performance problems with it.
> ]
> 
> Here's a code snippet:
> 
> i = 0
> while (i < 20):
>   i = i + 1


You probably want to change that to:

for i in range(20):

If 20 is just a place-holder, and the real value is much bigger, change
the range() to xrange().


>   (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")  # for testing, the
> spawned shell does nothing
>   print 'next'
> #  for line in shellOut:
> #       print line
> 
> On my system (AIX 5.1 if it matters, with Python 2.4.3), this simple
> loop spawning 20 subshells takes .75 sec.  Ok, that's reasonable.  Now,
> if I uncomment the two commented lines, which loop over the empty
> shellOut array, the progam now takes 11 secs.   That slowdown seems
> very hard to believe.  Why should it slow down so much?

What are you using to time the code?

Replacing print statements with "pass", I get these results:

>>> import timeit
>>>
>>> def test():
...     i = 0
...     while (i < 20):
...             i = i + 1
...             (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")
...             pass # print 'next'
...             for line in shellOut:
...                     pass # print line
...
>>> timeit.Timer("test()", "from __main__ import test\nimport os").timeit(1)
0.49781703948974609
>>> timeit.Timer("test()", "from __main__ import test\nimport os").timeit(100)
54.894074201583862

About 0.5 second to open and dispose of 20 subshells, even with the "for
line in shellOut" loop.


I think you need some more fine-grained testing to determine whether the
slowdown is actually happening inside the "for line in shellOut" loop or
inside the while loop or when the while loop completes.



-- 
Steven.



From robert.kern at gmail.com  Thu Nov  2 16:00:51 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 02 Nov 2006 13:00:51 -0800
Subject: Python in sci/tech applications
In-Reply-To: <eidlpc$qfi$1@sea.gmane.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<mailman.1677.1162490601.11739.python-list@python.org>	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>	<eideec$tk8$1@sea.gmane.org>
	<eidlpc$qfi$1@sea.gmane.org>
Message-ID: <eidma2$sp1$1@sea.gmane.org>

Steve Holden wrote:
> Robert Kern wrote:
>> bearophileHUGS at lycos.com wrote:
>>
>>> Robert Kern:
>>>
>>>> We distribute mingw set up to do this with our "Enthought
>>>> Edition" Python distribution.
>>>> http://code.enthought.com/enthon/
>>> Sorry, maybe I'm blind but I don't see MinGW listed in that page...
>>> Maybe it's included but not listed...
>>
>> It's there.
>>
> Well I tend to believe you, but Firefox is calling you a liar: a search 
> fails at "min".

Sorry, by "it's there" I meant "it is actually included in the distribution 
regardless of any omissions on the web page."

> Do you anticipate a 2.5-based release any time soon?

We'll start working on it soon, at least.

-- 
Robert Kern

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



From pavlovevidence at gmail.com  Thu Nov 23 20:08:03 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 23 Nov 2006 17:08:03 -0800
Subject: Trying to understand Python objects
In-Reply-To: <ek4e6j$hfn$1@panix3.panix.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<mailman.564.1164158130.32031.python-list@python.org>
	<ek4e6j$hfn$1@panix3.panix.com>
Message-ID: <1164330483.262739.154280@k70g2000cwa.googlegroups.com>


Aahz wrote:
> In article <mailman.564.1164158130.32031.python-list at python.org>,
> Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
> >
> >Typically, classes are created as a subclass of another class. The
> >top-level basic type in Python is 'object', so if your class doesn't
> >make sense deriving from anything else, derive from 'object'.
> >
> >    class Point(object):
> >        pass
> >
> >Defining a class with *no* superclass is not recommended. If you don't
> >yet understand the difference between the above style (called a
> >"new-style" class) and the style you presented, you should always
> >derive from a superclass ('object' or something more specific) until
> >you encounter a situation where that causes a problem.
>
> Side note: I disagree with the above advice, but it's Thanksgiving and I
> don't have enough room on the margin for the proof.  I think classic
> classes are just fine.

Absolutely.  We don't want newbies' feeble brains to explode.


Carl Banks



From martin.witte at gmail.com  Wed Nov  1 14:56:50 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 1 Nov 2006 11:56:50 -0800
Subject: best way to check if a file exists?
In-Reply-To: <mailman.1606.1162392331.11739.python-list@python.org>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
	<mailman.1597.1162389697.11739.python-list@python.org>
	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>
	<mailman.1606.1162392331.11739.python-list@python.org>
Message-ID: <1162411010.495259.311680@i42g2000cwa.googlegroups.com>



On Nov 1, 3:44 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "witte... at hotmail.com" <martin.wi... at gmail.com> writes:
> > Ben Finney wrote:
> > > "witte... at hotmail.com" <martin.wi... at gmail.com> writes:
> > > > You could try to read the file, if that fails it doesn't exist:
>
> > > Except that there are other conditions than "File doesn't exist"
> > > that can cause an 'open' to fail.
>
> > Ok, true. You can test explicit on non existence as follows, and then
> > decide to open the fileOr you can simply use 'os.path.exists', as has been suggested several
> times in this thread.
>
os.path.exists() checks if a path exists, so a directory as argument
also returns True
> --
>  \      "The way to build large Python applications is to componentize |
>   `\          and loosely-couple the hell out of everything."  -- Aahz |
> _o__)                                                                  |
> Ben Finney



From pavlovevidence at gmail.com  Fri Nov  3 18:24:27 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 3 Nov 2006 15:24:27 -0800
Subject: Javascript is turning into Python?!
In-Reply-To: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1162596267.518634.164170@h54g2000cwb.googlegroups.com>

Paul Rubin wrote:
> I hadn't seem this before.  New Javascript 1.7 features:
>
> - Generators
> - Iterators
> - Array comprehensions
> - Destructuring assignment
>
> Sounds like another language we know.
>
> http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7

Maybe in exchange, Python can borrow the let statement.


Carl Banks



From fredrik at pythonware.com  Mon Nov 13 15:58:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 21:58:50 +0100
Subject: str.title question after '
In-Reply-To: <1163417015.047332.197000@m73g2000cwd.googlegroups.com>
References: <slrnelgi3p.r7i.apardon@rcpc42.vub.ac.be>
	<1163417015.047332.197000@m73g2000cwd.googlegroups.com>
Message-ID: <ejamaa$ahm$1@sea.gmane.org>

Leo Kislov wrote:

>> Is there an easy way to get what I want?
> 
> def title_words(s):
>     words = re.split('(\s+)', s)
>     return ''.join(word[0:1].upper()+word[1:] for word in words)

nit: to work well also for Unicode strings using arbitrary alphabets, 
you should use title() instead of upper().  a naive upper() will do the 
wrong thing in some cases, as can be seen in the following example:

 >>> u = u"\u01C9"
 >>> unicodedata.name(u)
'LATIN SMALL LETTER LJ'
 >>> unicodedata.name(u.upper())
'LATIN CAPITAL LETTER LJ'
 >>> unicodedata.name(u.title())
'LATIN CAPITAL LETTER L WITH SMALL LETTER J'

</F>



From sjmachin at lexicon.net  Sat Nov 18 17:38:20 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 14:38:20 -0800
Subject: print with variable justification (with *)
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
	<mailman.438.1163884150.32031.python-list@python.org>
Message-ID: <1163889500.346015.214830@m73g2000cwd.googlegroups.com>

tom wrote:
> Why Tea wrote:
> > print format % values
> > An optional minimum width of the conversion, specified using one or
> > more digits or an asterisk (*), which means that the width is taken
> > from the next item in values
> >
> > That's from one of O'reilly's books. But there is no example and I
> > couldn't get it to work by trials and errors. Does anyone have a
> > working example?
> >
> > /Why Tea
> >
> >
> value = 3.141592654
> print "%1.3f" % value

Please consider reading the subject of a message occasionally :)

| >>> value = 3.141592654
| >>> print "%1.3f" % value
| 3.142
| >>> print "%10.3f" % value
|      3.142
| >>> print "%*.3f" % (1, value)
| 3.142
| >>> print "%*.3f" % (10, value)
|      3.142
| >>> for n in range(11):
| ...     print "%*.3f" % (n, value)
| ...
| 3.142
| 3.142
| 3.142
| 3.142
| 3.142
| 3.142
|  3.142
|   3.142
|    3.142
|     3.142
|      3.142
| >>>
> >
> there you go :)

There *you* go :)

>  look at printf in c for general ideas about the format
> specifiers

Unfortunately this is about the same advice as given by the official
Python tutorial:

"""Most formats work exactly as in C [snip] Using * to pass the width
or precision in as a separate (integer) argument is supported"""

Not quite so many folks come to Python with a background in C these
days. Is anyone aware of a tutorial that covers % formatting from a
standing start?

Cheers,
John



From fredrik at pythonware.com  Mon Nov 20 03:57:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 09:57:36 +0100
Subject: a few extensions for the itertools
In-Reply-To: <45616b46$0$12642$3b214f66@tunews.univie.ac.at>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
Message-ID: <ejrqm1$892$1@sea.gmane.org>

Mathias Panzenboeck wrote:

> No, because the builtin sum want's a list.

the one in Python doesn't:

 >>> def g():
...     for i in range(3):
...         print "yield", i
...         yield i
...
 >>> sum(g())
yield 0
yield 1
yield 2
3

</F>



From ompaniess at gmail.com  Fri Nov  3 10:03:10 2006
From: ompaniess at gmail.com (ompaniess)
Date: 3 Nov 2006 07:03:10 -0800
Subject: MemoDepot: build YOUR OWN online notes library - anything, anytime,
	anywhere
Message-ID: <1162566190.152198.250310@h48g2000cwc.googlegroups.com>

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information everyday. how can you keep those that truly matters to you?
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- Capture any information, store as notes in your MemoDepot account,
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- Organize your notes the way you like, they are always available at
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- Pinpoint any notes by powerful search, just when you need it
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- Export your notes to local machine, so you take control, not
MemoDepot

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From edgomez at consultant.com  Mon Nov 27 12:44:46 2006
From: edgomez at consultant.com (Edwin Gomez)
Date: Mon, 27 Nov 2006 12:44:46 -0500
Subject: Calling a thread asynchronously with a callback
Message-ID: <20061127174454.4407383986@ws1-2a.us4.outblaze.com>

I'm a C# developer and I'm new to Python.  I would like to know if the concept of Asynchronous call-backs exists in Python.  Basically what I mean is that I dispatch a thread and when the thread completes it invokes a method from the calling thread.  Sort event driven concept with threads.


Thanks. 

Ed Gomez


From eric_brunel at despammed.com  Thu Nov  9 03:14:10 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 09 Nov 2006 09:14:10 +0100
Subject: Problem getting a file pathname with tkFileDialog
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
Message-ID: <op.tiqo5w1grqur0o@eb.pragmadev>

On Wed, 08 Nov 2006 20:01:08 +0100, <cdroulers at hotmail.com> wrote:

> Hello,
> I am working on a school project that requires me to get the path of a
> filename for future treatment.
> I've tried getting a file with tkFileDialog.askopenfile.
>
>
> ********************************************
> import tkFileDialog
> file = tkFileDialog.askopenfile()
> print file
> ********************************************
>
>
> It prints the opened files stuff, but I just can not find how to get
> that path as a string. I've searched around google and the present
> group, and found no documentation on the file class used with
> tkFileDialog. Does someone have a solution for that?

Use tkFileDialog.askopenfilename?

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From ptmcg at austin.rr._bogus_.com  Wed Nov  1 12:03:10 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 01 Nov 2006 17:03:10 GMT
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
Message-ID: <ir42h.449$lx6.293@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:XU32h.436$lx6.417 at tornado.texas.rr.com...
Errata:

> opAssoc = Constants(object)
Urk!  Should be "opAssoc = Constants()"

> and so on.  In the client modules they would simply enter "from glk import 
> fileusage, filemode".  Or if they just "import glk", the references to the 
> constants look like "glk.filemode.Append", "flk.fileusage.TextMode", etc.,
Should be "glk.fileusage.TextMode".

-- Paul 




From no-spam at no-spam-no-spam.invalid  Fri Nov  3 05:48:54 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 11:48:54 +0100
Subject: Feature Request: Py_NewInterpreter to create separate GIL (branch)
In-Reply-To: <eif219$bat$1@news.sap-ag.de>
References: <eiddl5$qpn$1@news.albasani.net> <eif219$bat$1@news.sap-ag.de>
Message-ID: <eif6qp$7l5$1@news.albasani.net>

Feature Request: Py_NewInterpreter to create separate GIL (branch)

Daniel Dittmar wrote:
> robert wrote:
>> I'd like to use multiple CPU cores for selected time consuming Python 
>> computations (incl. numpy/scipy) in a frictionless manner.
>>
>> Interprocess communication is tedious and out of question, so I 
>> thought about simply using a more Python interpreter instances 
>> (Py_NewInterpreter) with extra GIL in the same process.
> 
> If I understand Python/ceval.c, the GIL is really global, not specific 
> to an interpreter instance:
> static PyThread_type_lock interpreter_lock = 0; /* This is the GIL */
> 

Thats the show stopper as of now.
There are only a handfull funcs in ceval.c to use that very global lock. The rest uses that funcs around thread states.

Would it be a possibilty in next Python to have the lock separate for each Interpreter instance. 
Thus: have *interpreter_lock separate in each PyThreadState instance and only threads of same Interpreter have same GIL?
Separation between Interpreters seems to be enough. The Interpreter runs mainly on the stack. Possibly only very few global C-level resources would require individual extra locks.

Sooner or later Python will have to answer the multi-processor question. 
A per-interpreter GIL and a nice module for tunneling Python-Objects directly between Interpreters inside one process might be the answer at the right border-line ? Existing extension code base would remain compatible, as far as there is already decent locking on module globals, which is the the usual case.

Robert


From cemerick at snowtide.com  Sat Nov 18 21:56:10 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Sat, 18 Nov 2006 21:56:10 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejnie7$q6k$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<ejmm4d$guk$1@sea.gmane.org>	<894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>	<ejncck$9eg$1@sea.gmane.org>
	<E7DA9C0B-283D-408D-92EC-A05E747E945E@snowtide.com>
	<ejnie7$q6k$1@sea.gmane.org>
Message-ID: <04CD655B-63BA-4902-B4A6-53F5B787C108@snowtide.com>

On Nov 18, 2006, at 1:12 PM, Fredrik Lundh wrote:

> Chas Emerick wrote:
>
>> Further, the fact that ET/lxml works the way that it does makes me
>> think that there may be some other landmines in the underlying model
>> that we might not have discovered until some days, weeks, etc., had
>> passed
>
> so the real reason you posted your original post was to spread some  
> FUD,
> not to get help?  that's a bit disappointing.

<sarcasm>
Yeah, that's exactly it.  In fact, if you look back at the head of  
this thread, you'll see how I was looking to disparage ET.  I  
especially wanted to make sure ET's API doesn't get any traction in  
the python community.  It's especially important that ET not find  
popular success and acclaim -- I'd have quite a bit to gain from it  
remaining a niche library.
</sarcasm>

Fredrik, I wasn't attempting to spread anything.  I was confused, I  
posed some illustrative examples, and asked for people's thoughts.   
Your reply gave me the right vocabulary to find more information  
(i.e. about Infoset), and I replied with a overview of what I had  
learned so as to benefit anyone with similar questions or confusion  
in the future.  A discussion ensued.

ET (and lxml) is obviously extremely successful, widely used, and for  
good reason.  It's just not right for us, but you incorrectly  
surmised that I was simply lazy by not modifying/extending ET/lxml to  
make it suitable for our purposes even when other libraries existed  
that better meshed with our requirements.  I tried to answer as  
straightforwardly as possible, and (regrettably, it turns out)  
included the fact that I had worried that our apparent conceptual  
differences indicated that we might find other instances where ET/ 
lxml works differently than we would expect.  I think that's very  
rational, and doesn't speak poorly of ET in any way (especially given  
its obvious success elsewhere).

- Chas


From bignose+hates-spam at benfinney.id.au  Wed Nov  1 09:00:53 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Nov 2006 01:00:53 +1100
Subject: best way to check if a file exists?
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
Message-ID: <87ac3b5kru.fsf@benfinney.id.au>

"wittempj at hotmail.com" <martin.witte at gmail.com> writes:

> You could try to read the file, if that fails it doesn't exist:
>
> try:
>     f = open('xxx')
> except IOError:
>     f = open('xxx', 'w')
>     print "file doesn't exist"
> print f

Except that there are other conditions than "File doesn't exist" that
can cause an 'open' to fail.

-- 
 \            "If you continue running Windows, your system may become |
  `\                 unstable."  -- Microsoft, Windows 95 BSOD message |
_o__)                                                                  |
Ben Finney



From mnations at gmail.com  Sun Nov  5 01:28:02 2006
From: mnations at gmail.com (Mudcat)
Date: 4 Nov 2006 22:28:02 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <454d73ab@quokka.wn.com.au>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
Message-ID: <1162708081.974808.283370@i42g2000cwa.googlegroups.com>

When you say far better widgets, do you mean that it has a greater
number of widgets to choose from, or that the types of widgets are
basically the same but have a greater amount of flexibility in them?

Personally I find programming in Tkinter fairly simple and
straight-forward. I'm sure a lot of that is due to the fact I've been
using it for a while and have many templates already available when I
start to work on something new. But I don't find myself questioning it
very much for unnecessary typing like I do other things.

As far as appearance goes, I've scoured the net looking for examples of
widgets produced wxPython or other UIs, and I really don't see that
much difference than Tkinter. Now I haven't done a whole lot of
programming on XP, but as far as W2000 is concerned they all look very
similar.

What would be really cool is if someone were to come up with a UI that
has a totally new look and feel than anything that currently exists on
Windows. It seems like most of the native look and feel, even in XP,
are rather boxy and stale. I don't like Macs, but they do have cool
looking windows and frames.

Now I hardly know anything at all about low-level windows calls and
what is/is not possible. But I know that many applications draw their
own windows, skins, and functionality widgets to provide a sharper
appearance. It seems like it would be possible for someone to draw
these widgets and provide an api to display them through Python.


timmy wrote:
> Mudcat wrote:
> > I have been using Tkinter for several years now. Recently I have been
> > thinking about switching to something else that may have a sharper
> > appearance. However I'm not sure what that may be, and if that
> > something else is *that* much better than what I'm already using.
> >
> > Does everyone agree that wxPython looks best on Windows? I've also read
> > in a couple of places where Dabo looks pretty good as well.
> >
> > So if someone were to pick a UI that gave the best appearance, what
> > would they choose?
> >
> >
> i've been using wxpython for a few years and it's great.
> it's got far better widgets then tkinter and it's speed is greater on
> large stuff as well.
> it's got a great support forum and the maintainer robin dunn does a
> great job of answering all questions.
> i can't particularly fault wxpython. it looks great on all platforms and
> maintain the native look and feel of the platofrm as well.



From no-spam at no-spam-no-spam.invalid  Sat Nov 18 07:44:12 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 18 Nov 2006 13:44:12 +0100
Subject: numpy magic: cast scalar returns auto to python types float &
	int   ?
In-Reply-To: <mailman.358.1163788908.32031.python-list@python.org>
References: <ejk69e$2g1$1@news.albasani.net>	<mailman.337.1163769761.32031.python-list@python.org>	<ejkmmp$p6$1@news.albasani.net>
	<mailman.358.1163788908.32031.python-list@python.org>
Message-ID: <ejmv71$32h$1@news.albasani.net>

Robert Kern wrote:
> robert wrote:
> 
>> Didn't find the relevant reasoning within time. Yet guess the reason is isolated-module-centric. 
> 
> I gave you a brief rundown on this list already.
> 
>   http://mail.python.org/pipermail/python-list/2006-October/411145.html

think I took this into account already for this discussion.

>>> array([1.,.0,4,4,],float32)
array([ 1.,  0.,  4.,  4.], dtype=float32)
>>> a=_
>>> a+3
array([ 4.,  3.,  7.,  7.], dtype=float32)
>>> a+3.0
array([ 4.,  3.,  7.,  7.], dtype=float32)
>>> 3+a
array([ 4.,  3.,  7.,  7.], dtype=float32)
>>> 3.0+a
array([ 4.,  3.,  7.,  7.], dtype=float32)
>>> 3.0*a
array([  3.,   0.,  12.,  12.], dtype=float32)


numpy does anyway not force the precision upwards for float32 x python-float. ( what is good so).

There remains the argument, that (float64,int32) scalars coming out should - by default - support the array interface. 
How many people are there to expect and use this? I'd have never noticed it, if it wouldn't have been mentioned here. Have never seen such code nor seen somewhere or felt myself such a requirement. Thats very special an maybe can be turned on by a global option - if there is more than a handful of users for that.
I still think this is over-design and that it brings much much more disadvantages than advantages to let these beasts out by default into a general purpose language like python. The target area for numpy output is much bigger than that e.g. for matlab script someone uses in a rush to create a paper. Maybe for users who want to make an alt-matlab-only box out of python there could be a global switch somewhere or a enforcing versions of the data types ...

Seeing the speed impact and pickle-problems now everywere on post-computations upon numpy out, its a critical decision to migrate code to numpy. Almost a killer. Even if I spread float()-casts everywhere, this cost a lot of speed, makes code ugly etc., and its an holey sieve.

I think I'll stay as a voice to vote heavily against that scheme of numpy scalar types. 11 on a scale from 0 to 10 :-)


> And yet again, the best place for numpy questions is the numpy mailing list, not
> here. Here, you will get maybe one or two people responding to you, usually me,
> and I'm a cranky SOB. There you will get much nicer people answering your
> questions and more fully.
> 
>   http://www.scipy.org/Mailing_Lists

Maybe once I take the hurdle to use this. Access and searching on such lists is somewhat proprietry. Numerics is a major field in Python land. There are also lots of cross relations to other libs and techniques.  Maybe there could be a nntp-comfortable comp.lang.python.numeric for users - and also a comp.lang.python.net, comp.lang.python.ui. I think that would greatly strentghen Pythons "marketing" in the numerics domain. main clp's posting frequency is too high anyway meanwhile.


Robert


From onurb at xiludom.gro  Fri Nov 10 05:01:49 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 10 Nov 2006 11:01:49 +0100
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <45544e0f$0$3977$426a74cc@news.free.fr>

gavino wrote:
> both are interpreted oo langauges......

Being "interpreted" or whatever is a feature of an *implementation*, not
of a language.

FWIW, CPython (the reference implementation) is compiled to byte-code,
that is then executed by a virtual machine. And Sun's Java
implementation works the same.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mpraveenreddy at gmail.com  Sun Nov  5 13:41:16 2006
From: mpraveenreddy at gmail.com (Praveen)
Date: 5 Nov 2006 10:41:16 -0800
Subject: How to get/read Hard disk label / drive label
Message-ID: <1162752076.121514.313750@h48g2000cwc.googlegroups.com>

I want to read individual disk label

for Hard disk (C: drive, D: drive disk label)
and
CD-ROM disk label

Please provide some pointer to the code or document.

Thanks in advance.



From robert.kern at gmail.com  Tue Nov  7 15:19:32 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 07 Nov 2006 14:19:32 -0600
Subject: C wrapper
In-Reply-To: <1162930226.658619.79830@m73g2000cwd.googlegroups.com>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
Message-ID: <eiqpot$m1e$1@sea.gmane.org>

Sheldon wrote:

> This function is there and is called init_mymodule() but I have other
> functions that are not static.

Is the module's name "_mymodule"? Or is it "mymodule"?

-- 
Robert Kern

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



From mail at microcorp.co.za  Thu Nov 16 01:43:46 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 16 Nov 2006 08:43:46 +0200
Subject: Secure Python
References: <1163646179.11586.60.camel@pc7.dolda2000.com>
Message-ID: <017e01c7094b$86c36ce0$03000080@hendrik>

 "Fredrik Tolf" <fredrik at dolda2000.com> wrote:

> I was thinking that maybe it could be possible to load and run untrusted
> Python code, simply by loading it in a module with a modified version of
> __builtins__. Without any reachable function that do unsafe operations,
> code running from there shouldn't be able to do evil things.

google for "sandbox"

- Hendrik



From claird at lairds.us  Fri Nov 10 18:11:53 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 10 Nov 2006 23:11:53 +0000
Subject: PDF to text script
References: <1163188222.330683.9160@e3g2000cwe.googlegroups.com>
Message-ID: <pidf24-3v6.ln1@lairds.us>

In article <1163188222.330683.9160 at e3g2000cwe.googlegroups.com>,
Vyz <vyzasatya at gmail.com> wrote:
>I am looking for a PDF to text script. I am working with multibyte
>language PDFs on Windows Xp. I need to batch convert them to text and
>feed into an encoding converter program
>
>Thanks for any help in this regard
>

<URL: http://phaseit.net/claird/comp.text.pdf/PDF_converters.html#pdf2txt >



From fredrik at pythonware.com  Sun Nov 26 15:41:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 21:41:03 +0100
Subject: pdb question
In-Reply-To: <1164572933.131055.43940@14g2000cws.googlegroups.com>
References: <1164572933.131055.43940@14g2000cws.googlegroups.com>
Message-ID: <ekcu4v$me$1@sea.gmane.org>

tac-tics wrote:

> In the Python debugger (pdb), how do you designate breakpoints at the
> start of methods?
> I've tried:
> break methodName
> break class.methodName
> break object.methodName
> 
> but none of these seem to work. What is the trick?

define "seem to work".

the "className.methodName" and "object.methodName" forms seem to work 
just fine to me (assuming that the class or object has been defined, of 
course).

if nothing else works, you can use the line or file:line syntax.

</F>



From Leo.Kislov at gmail.com  Tue Nov 28 11:19:21 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 08:19:21 -0800
Subject: Problem with imaplib (weird result if mailbox contains a %)
References: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>
Message-ID: <1164727244.400677.36150@l12g2000cwl.googlegroups.com>


Antoon Pardon wrote:
> This little program gives IMO a strange result.
>
> import imaplib
>
> user = "cpapen"
>
> cyr = imaplib.IMAP4("imap.vub.ac.be")
> cyr.login("cyrus", "cOn-A1r")
> rc, lst = cyr.list('""', "user/%s/*" % user)
> for el in lst:
>   print "%r" % (el,)
>
> And the result is:
>
> '(\\HasNoChildren) "/" "user/cpapen/Out"'
> '(\\HasNoChildren) "/" "user/cpapen/Punten"'
> '(\\HasNoChildren) "/" "user/cpapen/Spam"'
> '(\\HasNoChildren) "/" "user/cpapen/agoog to be"'
> '(\\HasNoChildren) "/" "user/cpapen/artistiek &- kunst"'
> '(\\HasNoChildren) "/" "user/cpapen/copains et copinnes =x="'
> '(\\HasNoChildren) "/" "user/cpapen/cp &- writing"'
> '(\\HasNoChildren) "/" "user/cpapen/examen"'
> '(\\HasNoChildren) "/" "user/cpapen/important info (pass)"'
> '(\\HasNoChildren) "/" "user/cpapen/lesmateriaal"'
> '(\\HasNoChildren) "/" "user/cpapen/love &- flesh for fantasy"'
> '(\\HasNoChildren) "/" "user/cpapen/media"'
> '(\\HasNoChildren) "/" "user/cpapen/music &- beats"'
> ('(\\HasNoChildren) "/" {25}', 'user/cpapen/newsletters %')
> ''
> '(\\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"'
> '(\\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"'
> '(\\HasNoChildren) "/" "user/cpapen/the closest ones to me [x]"'
> '(\\HasNoChildren) "/" "user/cpapen/vubrations"'
> '(\\HasNoChildren) "/" "user/cpapen/wm2addressbook"'
> '(\\HasNoChildren) "/" "user/cpapen/wm2prefs"'
> '(\\HasNoChildren) "/" "user/cpapen/wm2signature"'
>
>
> What I have a problem with is the 14th and 15th line.
> All other entries are strings but the 14th is a tuple.
> and the 15th is an empty string. As far as I can tell
> every time a "%" is in the mailbox name I get this kind of
> result.
>
> I'm using python 2.3.3 and the imap sytem is Cyrus.
>
> Can someone explain what is going one?
>
> Is this a bug?

Empty string seems to be a bug. But tuple is by design, read the docs
and imap rfc. The protocol is convoluted in the first place, and so is
python interface.

> If it is, is it fixed in later versions?

Why don't you try to pull imaplib.py from later versions? I don't think
it changed that much so it should be compatible with python 2.3

> Whether or not it is a bug, can I rely on the mailbox
> being the last item in the tuple in these cases?

Yes (at least for list command)

  -- Leo



From sjmachin at lexicon.net  Tue Nov 21 01:33:56 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 22:33:56 -0800
Subject: rpncalc-2.5 RPN Calculator for Python
In-Reply-To: <mailman.524.1164083771.32031.python-list@python.org>
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>
	<1164009539.310173.248620@m7g2000cwm.googlegroups.com>
	<mailman.524.1164083771.32031.python-list@python.org>
Message-ID: <1164090836.703397.45350@k70g2000cwa.googlegroups.com>

Hendrik van Rooyen wrote:
> "John Machin" <sjmachin at lexicon.net> WROTE:
>
> > Hendrik van Rooyen wrote:
> > > "Raymond L. Buvel" <levub137 at wi.rr.com> wrote:
> > >
> > >
> > > > The rpncalc package adds an interactive Reverse Polish Notation (RPN)
> > >
> > > Can anyone remember who the Pole was and how his name is spelled?
> > >
> > > (no fair googling)
> >
> > Remember who: yes
> > Remember spelling: you must be joking; however I do remember that the
> > name is given in Knuth TAOCP vol 3 as a test case for the soundex
> > algorithm.
> >
> > name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
> > :-)
> >
> > The first letter is LATIN CAPITAL LETTER L WITH STROKE.
>
> Thanks - I find it disgusting that I am completely unable to remember this -
>
> If his name had been Smith or Jones it would be no problem,
> but just because there are a few too many consonants for me
> to handle, it is as if there is a total black hole...
>
>

A *few* too many? By my count it's 6 consonants compared with 5 in "van
Rooyen".



From paddy3118 at netscape.net  Thu Nov  9 22:14:15 2006
From: paddy3118 at netscape.net (Paddy)
Date: 9 Nov 2006 19:14:15 -0800
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163128455.352864.26300@b28g2000cwb.googlegroups.com>


gavino wrote:

> both are interpreted oo langauges......

One can curl; the other, one can suck!

(Its early, I'm sure this will not be as funny at more decent hours).

Gavino, I suggest you take a very small problem, something like
computing pascals triangle for example, and write implementations in
both languages yourself.

- Paddy.



From rpdooling at gmail.com  Wed Nov  8 10:53:35 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 8 Nov 2006 07:53:35 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <4551FA0F.4000202@hotmail.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>
Message-ID: <1163001215.177739.238130@k70g2000cwa.googlegroups.com>

Chaz Ginger wrote:

>> it is supposed to be about PYTHON. Get it?

I agree. And Python is an extremely serious matter calling for decorum
and propriety.

Don't say fuck, ni, peng, or ni-wom.

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

rd



From bignose+hates-spam at benfinney.id.au  Tue Nov 28 17:44:59 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 29 Nov 2006 09:44:59 +1100
Subject: ANN: CherryPy 3.0 RC1
In-Reply-To: <d66b7a7f0611280608xc4b2f3bq954ca90ac9f54e54__27942.1564926908$1164736074$gmane$org@mail.gmail.com>
	(Christian Wyglendowski's message of "Tue, 28 Nov 2006 09:08:49
	-0500")
References: <d66b7a7f0611280608xc4b2f3bq954ca90ac9f54e54__27942.1564926908$1164736074$gmane$org@mail.gmail.com>
Message-ID: <87bqmrry1g.fsf@benfinney.id.au>

"Christian Wyglendowski" <christian at dowski.com> writes:

> I'm happy to announce the first release candidate for CherryPy 3.0.

Congratulations, I'm glad to see an announcement for CherryPy.

Please, in future, don't send HTML message bodies to public forums;
plain text is far better for such a wide audience.

-- 
 \        "When you go in for a job interview, I think a good thing to |
  `\               ask is if they ever press charges."  -- Jack Handey |
_o__)                                                                  |
Ben Finney <ben at benfinney.id.au>


From mealier_brice at NO_SPAM_yahoo.fr  Sun Nov  5 12:32:39 2006
From: mealier_brice at NO_SPAM_yahoo.fr (Brice)
Date: Sun, 5 Nov 2006 18:32:39 +0100
Subject: Wait for a system command executed in the background
Message-ID: <454e2037$0$97241$892e7fe2@authen.yellow.readfreenews.net>

Hello


I am new to python and I am really a bad programmer...

As a linux user, I use quodlibet for listening to music. Quodlibet
allows me to write plugins in python.

I am trying to write a plugins to burn a playlist by using cdrecord, and
this either in dao or tao mode.

The basic of this plugin is the following:

- make a temp directory
- convert the songs in my playlist into wave files in the temp directory
  using mplayer and renaming them with 3 digits number so that the order
of my playlist is conserved
- normalize the wave files
- burn the cd
- delete the temp directory.


At the time, I have a working solution (not fully developped by
myself...), but in this solution os.system is used to start the
different shell commands and the commands do not have a & at the end.
Therefore during the whole execution of the plugin, quodlibet is not
responsive.

What I would like to is program the whole such that I can use & at the
end of the shell commands and each command to be executed one after the
other! (I tried to put & simply at the end of each shell command with
the result that each where started at the same time)

Here is the plugin:

###########################################################################


import os, string, re
import util
import sys
import shutil
from qltk import ErrorMessage
from shutil import copy
from plugins.songsmenu import SongsMenuPlugin

class _Base(SongsMenuPlugin):
     PLUGIN_ICON = 'gtk-cdrom'
     PLUGIN_VERSION = '0.1'

     # XXX : pb potentiel: si deux utilisateurs utilisent ce plugin
     # en meme temps, ils vont se marcher sur les pieds...
     destdir = "/tmp/cd_QL"

     convert_cmd = "mplayer -ao pcm:file=%(dest)s %(source)s"
     normalize_cmd = "normalize -m %(path)s/*.wav"
     burn_cmd = "cdrecord -v -eject %(flags)s -pad -audio
%(path)s/*.wav"
     burn_flags = ''

     def plugin_songs(self, songs):
         if not self.check_mplayer():
             return

         self.setup()
         try:
             try:
                 for num, song in enumerate(songs):
                     self.makewav(song, num)
                 self.normalize()
                 self.burn()
             except Exception, e:
                 ErrorMessage(
                     None,
                     "Unknown error",
                     "An error occured while processing files:\n%s." % e
                     ).run()
         finally:
             self.teardown()

     def check_mplayer(self):
         if not util.iscommand("mplayer"):
             ErrorMessage(
                 None,
                 "Mplayer not found",
                 "Mplayer is used to convert files in wave files."
                 ).run()
             return False
         return True

     def setup(self):
         os.mkdir(self.destdir)

     def makewav(self, song, num):
         source = song['~filename'].replace(" ", "\
").replace("'","\\'")
         dest = os.path.join(self.destdir, "%03d.wav" % num)
         cmd = self.convert_cmd % dict(source=source, dest=dest)
         os.system(cmd)

     def normalize(self):
         os.system(self.normalize_cmd % dict(path=self.destdir))

     def burn(self):
         flags = self.burn_flags
         cmd = self.burn_cmd % dict(path=self.destdir, flags=flags)
         os.system(cmd)

     def teardown(self):
         shutil.rmtree(self.destdir)


class DAO(_Base):
     PLUGIN_ID = 'Burn CD w/o blanks'
     PLUGIN_NAME = _('Burn CD w/o blanks')
     PLUGIN_DESC = 'Burn CD w/o blanks.'
     burn_flags = '-dao'


class TAO(_Base):
     PLUGIN_ID = 'Burn CD with blanks'
     PLUGIN_NAME = _('Burn CD with blanks')
     PLUGIN_DESC = 'Burn CD with blanks.'

# on exporte seulement ces deux classes
__all__ = ['DAO', 'TAO']



#############################################################################



and yeah, please consider that I am new to python and do understand
something to the thread!


Thanks in advance

-- 
Brice
Arch Linux (Linux user nb. 372699)
-----
"Unix IS user friendly, it is just selective about who his friends are"


From l.m.aangeenbrug at gmail.com  Mon Nov 13 12:11:13 2006
From: l.m.aangeenbrug at gmail.com (lennart)
Date: 13 Nov 2006 09:11:13 -0800
Subject: Is python for me?
Message-ID: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>

Hi,

I'm planning to learn a language for 'client' software. Until now, i
'speak' only some web based languages, like php. As a kid i programmed
in Basic (CP/M, good old days :'-) ) Now i want to start to learn a
(for me) new computer language.

I like Python. Its free, easy to learn and some favorite programs of my
are written in Python / can understand Python (like OpenOffice) etc.

But I'm not a full-time programmer. I know, that I've only time &
possibility to learn one (= 1) language good. So i ask myself is python
the language I'm looking for?

In the future, i want to write the following applications:
[*] A database driven program, which can handle my clients, tasks and
places (= 3 tables, has to work relative with each other). I think,
this isn't a problem for Python
[*] As a photographer i like to build a picture management system (also
db) with raw support. Raw is the raw-data from the sensor of the
camera. My questions:
- can python encode raw?
- can python head for a utility like dcraw?
- or head for a utility like IrfanView (delphi?) or something like
that? 

Tnx for your help!



From stefan.behnel-n05pAM at web.de  Wed Nov 22 08:23:15 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Nov 2006 14:23:15 +0100
Subject: Pyparsing Question.
In-Reply-To: <1164188646.047093.182390@f16g2000cwb.googlegroups.com>
References: <1164188646.047093.182390@f16g2000cwb.googlegroups.com>
Message-ID: <45644F43.3050007@web.de>

Ant wrote:
> So I thought I'd look into the pyparsing module, but can't find a
> simple example of processing random text.

Have you looked at the examples on the pyparsing web page?

Stefan


From larry.bates at websafe.com  Wed Nov  8 14:26:33 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 08 Nov 2006 13:26:33 -0600
Subject: Python deployment options.
In-Reply-To: <1162986129.233443.268730@h54g2000cwb.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162986129.233443.268730@h54g2000cwb.googlegroups.com>
Message-ID: <45522F69.1080606@websafe.com>

king kikapu wrote:
> I see...So, if these are the only options, the only "safe" bet is to
> install the language on the machine (beeing Win, Linux or Mac)
> and execute the .py files, right ??
> 
> 
> On Nov 8, 1:24 pm, "Chris_147" <chris.van.b... at gmail.com> wrote:
>> king kikapu wrote:
>>> Hi to all folks here,
>>> i just bought a book and started reading about this language.
>>> I want to ask what options do we have to deploy a python program to
>>> users that do not have the labguage installed ??
>>> I mean, can i make an executable file, or something that contains the
>>> runtime and the modules that the program only use or am i forced to
>>> download the language to the user machine so the .py  files can be run
>>> ??
>>> Thanks in advance,
>>> king kikapuWell, on Windows you have to look for the Py2Exe package
>> (www.py2exe.org)
>> On Mac OS X you can use Py2App
>> (http://undefined.org/python/py2app.html)
>>
>> Mind you, on Windows there is one big potentional problem: Python is
>> compiled with Visual Studio 2003 and needs msvcr71.dll.  So Py2Exe
>> wants to distribute that dll also, but if you don't have a valid Visual
>> Studio license, you are not allowed to.
>> It is explained further in this thread:http://groups.google.com/group/comp.lang.python/browse_frm/thread/bcc...
>>
>> I doubt Microsoft will unleash their lawyers on you, but it is a
>> problem.
> 

py2exe and py2app work extremely well.  I'm not sure why you wouldn't want
to use them if you want to distribute to those platforms.  Actually they
take the installed version of python out of the equation (at least I know
py2exe does).

-Larry


From fredrik at pythonware.com  Thu Nov 16 13:23:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 19:23:24 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <455CAA2E.5010708@tim.thechases.com>
References: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>
	<455CAA2E.5010708@tim.thechases.com>
Message-ID: <ejiaas$dto$1@sea.gmane.org>

Tim Chase wrote:

> I can't say I've come across any hosting places that serve up PHP 
> for $10/yr either...the closest I've found is about $3.50/mo 
> (which also provides Python CGI).

https://www.nearlyfreespeech.net/about/faq.php#Average

</F>



From fredrik at pythonware.com  Sat Nov 11 18:18:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 00:18:28 +0100
Subject: Python Parallel Paradigm
In-Reply-To: <vCJIsbAOLlVFNwjs@alma-services.abel.co.uk>
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>	<4556246a$0$326$e4fe514c@news.xs4all.nl>	<1163276885.609160.163090@h54g2000cwb.googlegroups.com>
	<vCJIsbAOLlVFNwjs@alma-services.abel.co.uk>
Message-ID: <ej5lo1$f4e$2@sea.gmane.org>

Sandy wrote:

>     I usually lurk on the comp.lang.python newsgroup.  I'm not an expert
> in the slightest, but I have had a growing feeling that there's
> something definitely lacking in the concurrency aspects of Python.

the culprit in this case appears to be Microsoft's console library, 
though.  I'm pretty sure that's not written in Python.

</F>



From grenier.sylvain at gmail.com  Thu Nov  2 16:38:21 2006
From: grenier.sylvain at gmail.com (mavicdog)
Date: 2 Nov 2006 13:38:21 -0800
Subject: problem controlling/displaying video thru "pexpect"
Message-ID: <1162503501.176338.133350@m7g2000cwm.googlegroups.com>

I am developing a small appl. for a student to code some video. I am
able to control mplayer in slave mode through IDLE using pexpect. In my
app though I want to display it in a particular frame and have buttons
control rw ff, stop, play etc... I am having two problems. One how do I
frame the mplayer window once it is called? How do I execute the
pexpect script I have working now from the app? I can post code if it
helps. thanks.



From smadim2 at grads.ece.mcmaster.ca  Mon Nov  6 15:01:55 2006
From: smadim2 at grads.ece.mcmaster.ca (M.N.Smadi)
Date: Mon, 06 Nov 2006 15:01:55 -0500
Subject: auto indent
Message-ID: <454F94B3.5070204@grads.ece.mcmaster.ca>

Hi there;

i have a script that is not indented properly. Is there a way that i can 
have it auto indented.

thanks
moe smadi


From noah.rawlins at comcast.net  Tue Nov 21 20:36:05 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Tue, 21 Nov 2006 20:36:05 -0500
Subject: Is time.time() < time.time() always true?
In-Reply-To: <mailman.565.1164158424.32031.python-list@python.org>
References: <2773CAC687FD5F4689F526998C7E4E5FF1EBCD@au3010avexu1.global.avaya.com>
	<mailman.565.1164158424.32031.python-list@python.org>
Message-ID: <GfydnefCyNEbNP7YnZ2dnUVZ_uadnZ2d@comcast.com>

Ben Finney wrote:
> Really? Where does Python guarantee that the left side *must* be
> evaluated before the right side of a comparison? (If the right side
> were to be evaluated first, the left might end up with a greater
> value.)
> 

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


From robert.kern at gmail.com  Fri Nov 17 15:21:13 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 14:21:13 -0600
Subject: Decimal() instead of float?
In-Reply-To: <1163794251.5107.151.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>	<ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper>
Message-ID: <ejl5k7$1sv$1@sea.gmane.org>

Michael B. Trausch wrote:
> I don't have (so far as I know) a 64-bit float available to me.

Yes, you do: the regular Python float type.

-- 
Robert Kern

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



From evenprimes at gmail.com  Thu Nov  9 14:13:21 2006
From: evenprimes at gmail.com (Chris Cioffi)
Date: Thu, 9 Nov 2006 14:13:21 -0500
Subject: opening excel
In-Reply-To: <4552d34b$1@quokka.wn.com.au>
References: <4552d34b$1@quokka.wn.com.au>
Message-ID: <f03f4fdf0611091113w18cc23fel42ff81bef09557df@mail.gmail.com>

You can also check out the pyExcelerator project.

http://sourceforge.net/projects/pyexcelerator

It seems to work reasonably well at direct Excel file manipulation.
However it isn't  meant as a VBA replacement kind of thing.

Chris

On 11/9/06, at open-networks.net"@bag.python.org timmy <"timothy> wrote:
> Hello,
>
> has anybody got any experience opening and manilpulating excel
> spreedsheets via python? it seems pythoncom allows this to happen but
> i'm a total newb to it. (i usually work in the unix world)
> all i need to do, is open the xls files and read values from it.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
"A little government and a little luck are necessary in life, but only
a fool trusts either of them." -- P. J. O'Rourke


From jstroud at mbi.ucla.edu  Sat Nov  4 04:42:30 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Nov 2006 09:42:30 GMT
Subject: PySchool - Online Python Web Framework Workshop.
In-Reply-To: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
Message-ID: <agZ2h.4143$9v5.1633@newssvr29.news.prodigy.net>

RobJ wrote:
> Hi! My Name is Rob Johnson and I am a graduate student at The Richard
> Stockton College of NJ. To make a long story short, I'm working on my
> Masters project in the MAIT program (Masters of Arts in Instructional
> Technology). I have written a proposal to put together a free on-line
> Python web framework workshop. The workshop will be geared to help
> people new to Python web frameworks. I am asking for the community's
> assistance to help me get this project off the ground. As part of my
> project, I am conducting a survey for people who are interested in
> learning more about python web frameworks.  The survey is located at
> http://killersurvey.com/answer_survey.php?id=479. I have also started a
> blog about this experience in order to let people know what I'm doing
> (http://pyschool.blogspot.com/). If you have a few minutes, please take
> a couple of minutes to take the quick survey. The survey is anonymous
> and the information will be used for statistics for my project. Also,
> any constructive feedback or suggestions that you can give me would be
> gladly appreciated.  
> 
> Thanks
> 
> Rob J
> 
Q9 should be "check all that apply" or otherwise qualified with "primarily".

Q10 is missing other types of broadband such as what one might find at 
school, and also have the option of multiple selections.


From sjmachin at lexicon.net  Mon Nov 20 04:59:26 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 01:59:26 -0800
Subject: trying to create a dictionary in python,
	using variables as a value
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
Message-ID: <1164016765.497299.193830@b28g2000cwb.googlegroups.com>

ronrsr wrote:
> but I keep getting syntax errors on this one -

On this one what? It would help very much if you showed the one
statement that is getting the syntax error.

>
>
>
> adict = {'zid': result[0][0], 'keywords': result{0][1],
> 'quotations':result[0][2],'citations':result[0]{3]};
> zhtml.print_update_form(adict);

If you were to set out your code neatly, the *two* syntax errors would
be somewhat more
obvious on inspection, and would enable easy detection when you tried
to load the file.

# The following is meant to have the "result"s aligned vertically ...
adict = {
    'zid':        result[0][0],
    'keywords':   result{0][1],
    'quotations': result[0][2],
    'citations':  result[0]{3],
    }
zhtml.print_update_form(adict)

===
C:\junk>ronsr2.py
  File "C:\junk\ronsr2.py", line 3
    'keywords':   result{0][1],
                        ^
SyntaxError: invalid syntax

>
> result [0][0] = 22L
> result [0].[1] = "Agricultural Subsidies, Global Trade', '

The above looks very much like a syntax error to me (dot between [0]
and [1])

>
> result[0][2]] = Lazio, Rick, "Some Trade Barrier1s Won\xe2\x80\x99t
> Fall," <i>The New York Times</i>, 8/9/03\\r\\n"

While not strictly syntax errors, I doubt very much whether Lazio and
Rick are intentional variable names! And they're not (looking at
"result" below)!! Why are you retyping all of this stuff? If you think
it's a help with discovering why there's a syntax error in the first
line, it's not a help, it's quite irrelevant. A syntax error means that
the statement is not a valid Python statement -- nothing to do with the
contents of any variables mentioned in the statement.

>
> result[0] [3] ='In 2002, the 30 industrial nations of the Organization
> for Economic Cooperation and Development spent $311 billion on domestic
> agricultural subsidies, which is more than the combined gross domestic
> products of all the countries of sub-Saharan Africa. The World Bank
> calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
> farmers comes out to $913 per cow; this dwarfs sub-Saharan
> Africa\xe2\x80\x99s per capita gross domestic product of
> $490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n
>
> result = ((22L, '((22L, 'Agricultural Subsidies, Global Trade', 'Lazio,
> Rick, "Some Trade Barrier1s Won\xe2\x80\x99t Fall," <i>The New York
> Times</i>, 8/9/03\\r\\n       \\r\\n       \\r\\n       ',
> '\xe2\x80\x9cIn 2002, the 30 industrial nations of the Organization for
> Economic Cooperation and Development spent $311 billion on domestic
> agricultural subsidies, which is more than the combined gross domestic
> products of all the countries of sub-Saharan Africa. The World Bank
> calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
> farmers comes out to $913 per cow; this dwarfs sub-Saharan
> Africa\xe2\x80\x99s per capita gross domestic product of
> $490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n       '),)n       ',
> '\xe2\x80\x9cIn 2002, the 30 industrial nations of the Organization for
> Economic Cooperation and Development spent $311 billion on domestic
> agricultural subsidies, which is more than the combined gross domestic
> products of all the countries of sub-Saharan Africa. The World Bank
> calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
> farmers comes out to $913 per cow; this dwarfs sub-Saharan
> Africa\xe2\x80\x99s per capita gross domestic product of
> $490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n       '),)
>



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 00:41:20 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Nov 2006 16:41:20 +1100
Subject: Physical constants
References: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>
	<mailman.1745.1162607876.11739.python-list@python.org>
Message-ID: <pan.2006.11.04.05.41.19.794905@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Nov 2006 18:38:33 -0800, Rares Vernica wrote:

> Hi,
> 
> I am not sure how the constants are implemented in math,

>>> import math
>>> math.__file__
'/usr/lib/python2.4/lib-dynload/mathmodule.so'

Looks like it is all done in C. It's probably just a binding to your
platform's C floating point library.

But regardless of where they come from, constants like pi are just regular
Python names and objects.

>>> math.pi
3.1415926535897931
>>> math.pi = 3
>>> math.pi
3

So not "real" constants, just constant-by-convention. Whether you call
that a feature or a wart is up to you.

But if you want actual constants that can't be re-bound, then look at this
recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65207

Keep in mind that this carries a performance penalty.


> but here is how 
> I would do it. The main idea is to declare the constants as globals in 
> some file.
> 
> Declare all the constants in a file:
> const.py
> ---
> pi = 3.14
> 
> Whenever you want to use pi from another file, just do:
> somecode.py
> ---
> from const import pi

Or just import const and refer to const.pi. That's arguably clearer,
although again there is a tiny performance cost.



-- 
Steven.



From dsa at unilestemg.br  Wed Nov  8 06:46:23 2006
From: dsa at unilestemg.br (Douglas Soares de Andrade)
Date: Wed, 8 Nov 2006 11:46:23 +0000
Subject: Python Jogos
In-Reply-To: <1162992589.682760.282340@k70g2000cwa.googlegroups.com>
References: <1162992589.682760.282340@k70g2000cwa.googlegroups.com>
Message-ID: <200611081146.23829.dsa@unilestemg.br>

Em Quarta 08 Novembro 2006 13:29, manelitoau at gmail.com escreveu:
> Jogo da velha
> Jogo do galo
> Codigos em python kem me arranja

----> Please excuse me for talking in portuguese here, just want to show the 
better place for Manelito to ask this.

Ol? Manelito,

O idioma usado nessa lista ? o ingl?s, caso n?o se sinta a vontade em fazer 
pergutas em ingl?s, favor perguntar na lista do grupo pythonbrasil.

Acesse o site a?: www.pythonbrasil.com.br

At?

-- 
Douglas Soares de Andrade
msn: douglas at tuxfamily.org
jabber: dsandrade at jabber.org
Quote: Real programmers don't die, they just GoSub and Return.


From cjw at sympatico.ca  Fri Nov 10 09:48:52 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 10 Nov 2006 09:48:52 -0500
Subject: range syntax
Message-ID: <ej23gl$du9$1@sea.gmane.org>

One of the little irritants of Python is that the range syntax is rather 
long-winded:
[Dbg]>>> range(3, 20, 6)
[3, 9, 15]
[Dbg]>>>
It would be nice if one could have something like 3:20:6.

I've just come across the r_class in numpy which doesn't go that far
but does provide a generalization of the above:
[Dbg]>>> r_[1:6:2, 6:8, (10, 11, 13), [20,25]]
array([ 1,  3,  5,  6,  7, 10, 11, 13, 20, 25])
[Dbg]>>>

Colin W.



From steve at REMOVE.THIS.cybersource.com.au  Sun Nov  5 12:22:51 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 06 Nov 2006 04:22:51 +1100
Subject: forwarding *arg parameter
References: <6pn3h.125$7b6.98@read3.inet.fi>
Message-ID: <pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>

On Sun, 05 Nov 2006 15:26:58 +0000, Tuomas wrote:

>  >>> def g(*arg):
> ...     return arg
> ...
>  >>> g('foo', 'bar')
> ('foo', 'bar')
>  >>> # seems reasonable

The function g:
- takes the arguments 'foo' and 'bar'
- collects them in a tuple named 'arg' = ('foo', 'bar')
- returns the tuple named arg


>  >>> g(g('foo', 'bar'))
> (('foo', 'bar'),)

The function g:
- takes the argument ('foo', 'bar')
- collects it in a tuple named 'arg' = (('foo', 'bar'),)
- returns the tuple named arg

The function is doing exactly the same as in the first case, except the
arguments are different.


>  >>> # not so good, what g should return to get rid of the outer tuple

Why do you want to? The way the function is now makes perfect sense. All
argument types are treated in exactly the same way:

g(string) => tuple containing string
g(float) => tuple containing float
g(int) => tuple containing int
g(list) => tuple containing list
g(instance) => tuple containing instance
g(tuple) => tuple containing tuple

You could write something like this:

def g(*arg):
    # Detect the special case of a single tuple argument
    if len(arg) == 1 and type(arg[0]) == tuple:
        return arg[0]
    else:
        return arg

but now tuple arguments are treated differently to all other data. Why do
you think you need that?


-- 
Steven



From martin at v.loewis.de  Fri Nov  3 18:40:27 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 04 Nov 2006 00:40:27 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eifhf3$mmh$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
Message-ID: <454bd36c$0$2364$9b622d9e@news.freenet.de>

robert schrieb:
> in combination with some simple locking (anyway necessary) I don't see a
> problem in ref-counting.

In the current implementation, simple locking isn't necessary.
The refcounter can be modified freely since the code modifying
it will always hold the GIL.

> ---- Question Besides:  do concurrent INC/DEC machine OP-commands
> execute atomically on Multi-Cores as they do in Single-Core threads?

Not necessarily, no. On x86, you need to prefix the instruction
with the LOCK prefix for it to become atomic. Otherwise, the
two necessary read/write cycles to main memory may interleave
with the memory operations of another processor.

On other processors, INC <mem> might not exist at all as an
instruction; when you only have register add, then implementing
an atomic increment is a challenge. That's why the Windows API
provides you with an atomic increment function as part of the
operating system API.

Regards,
Martin


From korvus at gmail.com  Mon Nov 20 11:13:01 2006
From: korvus at gmail.com (Jeff  Poole)
Date: 20 Nov 2006 08:13:01 -0800
Subject: cPickle problems
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
	<mailman.297.1163728684.32031.python-list@python.org>
	<1163730111.641857.142850@k70g2000cwa.googlegroups.com>
	<c4T7h.314$_H5.223@tornado.texas.rr.com>
Message-ID: <1164039181.157901.72130@m73g2000cwd.googlegroups.com>

> Jeff -
>
> Sorry not to reply sooner, I have been out of town with limited access to
> c.l.py.  Also, I didn't really pick up on "cPickle problems" as a
> pyparsing-related post. :)
>
> I would be happy to make ParseResults picklable, I didn't realize that this
> getattr behavior was defeating that capability.  I have had people
> successfully use pickle on pyparsing grammars, but have not had anyone
> report any pickle experience with ParseResults objects, either pro or con.
>
> I have a test version of pyparsing with pickling support added, and it
> passes my simple unit tests.  I could send it to you if you would test it
> against your program.
>
> -- Paul

Paul,

No problem, I think we've both been busy with other things.  I was
actually going to post something on the PyParsing wikispaces since I
wasn't sure if you checked here.  I wasn't actually intentionally
pickling any ParseResults objects, but I realized that in my parse
actions, I was making a copy of the "t" parameter, which is actually a
ParseResults object.  I switched my code to use t.asList() and things
are ok now.  If you'd like me to test your version, I'd be glad to,
otherwise I can wait until whenever that change makes it's way into a
release.

Jeff



From jeremit0 at gmail.com  Thu Nov  2 11:41:13 2006
From: jeremit0 at gmail.com (jeremito)
Date: 2 Nov 2006 08:41:13 -0800
Subject: string formatter for tuple
In-Reply-To: <mailman.1665.1162482229.11739.python-list@python.org>
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
	<454A126F.6040402@tim.thechases.com>
	<mailman.1665.1162482229.11739.python-list@python.org>
Message-ID: <1162485673.291576.140470@h48g2000cwc.googlegroups.com>


skip at pobox.com wrote:
> >>>>> "Tim" == Tim Chase <python.list at tim.thechases.com> writes:
>
>     >> How can I print a tuple with a single string format?
>
>     Tim>        print "a = %s" % str(a)
>     Tim> or
>     Tim>        print "a = %s" % repr(a)
>
> Or wrap the tuple in a tuple:
>
>     print "a = %s" % (a,)
> 
> Skip

Thank you all very much for your help.
Jeremy



From prouleau001 at gmail.com  Wed Nov 29 13:02:09 2006
From: prouleau001 at gmail.com (prouleau001 at gmail.com)
Date: 29 Nov 2006 10:02:09 -0800
Subject: Surprise with special floating point values
In-Reply-To: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>
References: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>
Message-ID: <1164823329.366889.257820@h54g2000cwb.googlegroups.com>



On Nov 29, 12:53 pm, prouleau... at gmail.com wrote:
> Hi all,
>
> While trying to use simplejson under Python 2.4.3 I have been
> investigating the handling of special floating point values and found
> that both Python 2.4 and 2.5 return False when comparing  a NaN with
> itself.   Although surprising, I imagine it could also be correct since
> NaN is not a number.  But is it correct?

And of course it is correct... As NaN does not compare with itself in
floating point:  http://en.wikipedia.org/wiki/NaN

Should have read it earlier...


> --
> Pierre Rouleau



From robin at reportlab.com  Fri Nov 10 05:23:46 2006
From: robin at reportlab.com (Robin Becker)
Date: Fri, 10 Nov 2006 10:23:46 +0000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <4553AEA9.5040902@jessikat.plus.net>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>	<45533D9F.5020002@chamonix.reportlab.co.uk>	<mailman.2001.1163109689.11739.python-list@python.org>
	<4553AEA9.5040902@jessikat.plus.net>
Message-ID: <45545332.7090208@chamonix.reportlab.co.uk>

Robin Becker wrote:
> Andrew MacIntyre wrote:
>> Robin Becker wrote:
>>
>>> I think it uses sysv semaphores and although freeBSD 6 has them 
>>> perhaps there's something I need to do to allow them to work.
>> IIRC, you need to explicitly configure loading the kernel module, or
>> compile the kernel with the necessary option in the config file.
>>
> I tried loading the module, but it seems already to be in the kernel. 
> Probably some sysctl stuff to do.
> 
In fact the semaphore modules are built in now. I did some debugging and the 
error happens in the code at SemSet.c line 25


   for (i = 0; i < sets; i++) {
     int id = semget(IPC_PRIVATE, MAX_SYSV_SET_SIZE, IPC_CREAT
             | S_IREAD | S_IWRITE); //SEM_R | SEM_A);
     if (id == -1) {

the first semget(i=0) succeeds and the second fails with an errno ENOSPC which 
from the man page implies a resource issue of some kind.

     [ENOSPC]           Insufficiently many semaphores are available.
     [ENOSPC]           The kernel could not allocate a struct semid_ds.


I guess the freebsd limits  must be different to the original development 
environment.
-- 
Robin Becker



From bignose+hates-spam at benfinney.id.au  Tue Nov 21 20:18:06 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 22 Nov 2006 12:18:06 +1100
Subject: Is time.time() < time.time() always true?
References: <2773CAC687FD5F4689F526998C7E4E5FF1EBCD@au3010avexu1.global.avaya.com>
Message-ID: <87bqn0wa7l.fsf@benfinney.id.au>

"Delaney, Timothy (Tim)" <tdelaney at avaya.com> writes:

> So long as the clock on the machine it's running on is not set
> backwards between the two calls, you can guarantee that
>
>    time.time() <= time.time()
>
> will always evaluate true.

Really? Where does Python guarantee that the left side *must* be
evaluated before the right side of a comparison? (If the right side
were to be evaluated first, the left might end up with a greater
value.)

-- 
 \       "A free society is one where it is safe to be unpopular."  -- |
  `\                                             Adlai Ewing Stevenson |
_o__)                                                                  |
Ben Finney



From fuzzyman at gmail.com  Tue Nov 21 10:37:15 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Nov 2006 07:37:15 -0800
Subject: best bet for using a .NET dll
In-Reply-To: <mailman.533.1164109512.32031.python-list@python.org>
References: <mailman.533.1164109512.32031.python-list@python.org>
Message-ID: <1164123435.063450.325910@k70g2000cwa.googlegroups.com>


Warren Jackson wrote:
> I'd like to make a simple program that uses the Canon digital camera
> SDK (EDSDK 1.3).  Basically I need to take pictures and download them
> to my computer.  They have a fair amount of example code for the .NET
> languages, and don't officially support anything else.
>
> The API uses more than the basic c types (references, etc.) that I'm
> not totally familiar with yet.  Included at the bottom is an example
> of one of the functions.
>
> What is my best bet for writing this in Python? cTypes, IronPython,
> something else?  I haven't worked with either before but am currently
> reading up.  It seams cTypes has a difficult time dealing with
> anything but the 'normal' c types, is this correct?
>
> Would it be easier to just write a program in C# to handle all of the
> fancy types? (ie. make a function that opens and closes session, finds
> camera, takes picture, downloads picture, saves picture - that can
> then be read in python) ?  This isn't a very attractive option to me.
>
> Thanks in advance for any insight.
>

This sounds like the sort of thing for which IronPython is ideal. It
should eliminate the need for C# unless you have to mark classes with
attributes (In which case you should be able to get away with a stub
class.)

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From prabhu at aero.iitb.ac.in  Sat Nov 18 05:39:31 2006
From: prabhu at aero.iitb.ac.in (Prabhu Ramachandran)
Date: Sat, 18 Nov 2006 16:09:31 +0530
Subject: [SciPy-user] About alternatives to Matlab
In-Reply-To: <455E0496.4020703@bryant.edu>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<455E0496.4020703@bryant.edu>
Message-ID: <17758.58083.69027.862918@prpc.aero.iitb.ac.in>

>>>>> "Brian" == Brian Blais <bblais at bryant.edu> writes:

    Brian> 3) 3D plotting requires yet-another library.  luckily I
    Brian> haven't had to use this much, but I hope that someday that
    Brian> it will be part of matplotlib.

I'd rather not say anything about this since I have strong opinions
about the subject.

    Brian> 4) GUI development is a bit easier in Matlab for small
    Brian> projects, and harder for larger ones.  I like using wax in
    Brian> python, which wraps wxPython.  Others swear by Dabo, but I
    Brian> always get two windows popping up when I run even the hello
    Brian> world daboui program.  At any rate, wxPython looks much
    Brian> better on Windows than the same interface in Matlab, and it
    Brian> is more robust across operating systems.

You should try and take a look at enthought.traits.  It makes creating
UIs a lot easier than anything else I've seen.

cheers,
prabhu




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 10 16:22:53 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 10 Nov 2006 22:22:53 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
	<mailman.2066.1163191529.11739.python-list@python.org>
Message-ID: <4rk8tdFrsq8fU1@mid.individual.net>

Fredrik Lundh wrote:

>  >>> color = "blue"
>  >>> if color == "red" or "green" or "yellow":
> ...     print color, "is red or green or yellow"
> ...
> blue is red or green or yellow

Whoops. Okay.

Regards,


Bj?rn

-- 
BOFH excuse #303:

fractal radiation jamming the backbone



From rtw at freenet.co.uk  Tue Nov 28 07:41:42 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Tue, 28 Nov 2006 06:41:42 -0600
Subject: Accessing file metadata on windows XP
References: <1164704134.100569.101270@j72g2000cwa.googlegroups.com>
Message-ID: <Xns988980E709A2DrtwfreenetREMOVEcouk@216.196.109.145>

 wrote in news:1164704134.100569.101270 at j72g2000cwa.googlegroups.com in 
comp.lang.python:

> When rightclicking a, for example, pdf file on windows, one normally
> gets a screen with three or four tags.  Clicking on one of the summary
> tag one can get some info like "title", "Author", "category", "keyword"
> etc..
> 
> My question is how can I programmatically read and change these data
> with python.  I know I should use Hammond's win32  extension, somehow
> involving the pythoncom, storagecon of win32com etc..  Unfortunately,
> so far I cannot get anything useful.  Instead of trying blindly, would
> somebody please points me to the correct direction.  A little snippet
> would help.  I am particular interested in pdf files.
> 

This looks like it might be useful:

<url:http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/shellcc/platform/shell/reference/objects/shellfolderitem/shellfolderit
em.asp>

Thats:

MSDN Home >  MSDN Library >  Win32 and COM Development >  User Interface 
>  Windows Shell >  Windows Shell >  Shell Objects for Scripting and 
Microsoft Visual Basic >  ShellFolderItem >  

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From jm.suresh at gmail.com  Sun Nov  5 08:29:19 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 5 Nov 2006 05:29:19 -0800
Subject: string to list of numbers conversion
In-Reply-To: <eikn9p$bbq$01$1@news.t-online.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
	<eikn9p$bbq$01$1@news.t-online.com>
Message-ID: <1162733359.612568.149870@f16g2000cwb.googlegroups.com>

Peter, Thanks.

This recipe fails when negative numbers are used.

safe_eval('(12, -12)')
*** Unsafe_Source_Error: Line 1.  Unsupported source construct:
compiler.ast.UnarySub

But, I think it could  be easily fixed for somebody who understands the
script. Can somebody help.

Thanks.
Suresh
Peter Otten wrote:
> jm.suresh at no.spam.gmail.com wrote:
>
> >   I have a string '((1,2), (3,4))' and I want to convert this into a
> > python tuple of numbers. But I do not want to use eval() because I do
> > not want to execute any code in that string and limit it to list of
> > numbers.
> >   Is there any alternative way?
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/364469
> 
> Peter



From shejo284 at gmail.com  Tue Nov  7 15:27:00 2006
From: shejo284 at gmail.com (Sheldon)
Date: 7 Nov 2006 12:27:00 -0800
Subject: C wrapper
In-Reply-To: <mailman.1848.1162930804.11739.python-list@python.org>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
	<mailman.1848.1162930804.11739.python-list@python.org>
Message-ID: <1162931220.448328.108160@e3g2000cwe.googlegroups.com>


Robert Kern skrev:

> Sheldon wrote:
>
> > This function is there and is called init_mymodule() but I have other
> > functions that are not static.
>
> Is the module's name "_mymodule"? Or is it "mymodule"?
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco

Here is the file/module name: _msgpps_functions.c
Here is the initfunction:

PyMODINIT_FUNC init_msgpps_functions(void) {
  PyObject* m;
  m=Py_InitModule("_msgpps_functions",_msgpps_functionsMethods);
  ErrorObject = PyString_FromString("_msgpps_functions.error");
  if(ErrorObject == NULL ||						\
     PyDict_SetItemString(PyModule_GetDict(m),"error",ErrorObject)!=0)
{
    Py_FatalError("Can't define _msgpps_functions.error");
    import_array();
  }     /*  access to Numeric PyArray functions */
}


I have not main() function in the file. Instead the main function is
called the same name:

static PyObject* _msgpps_functions(PyObject* self, PyObject* args)

Now I am new at this and I have been reading anything I can find. The
only thing that is out of place is the part which I didn't include:

    /* Initialize the Python interpreter.  Required. */
    Py_Initialize();

    /* Add a static module */
    initspam();
because I still don't understand this part.

/sheldon



From fredrik at pythonware.com  Sun Nov 19 11:25:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 17:25:04 +0100
Subject: Why isn't SPLIT splitting my strings
In-Reply-To: <1163952691.372592.76110@k70g2000cwa.googlegroups.com>
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>	<1163932286.420652.100100@f16g2000cwb.googlegroups.com>	<1163952617.270591.279730@j44g2000cwa.googlegroups.com>
	<1163952691.372592.76110@k70g2000cwa.googlegroups.com>
Message-ID: <ejq0h0$l5k$2@sea.gmane.org>

John Henry wrote:

> Oops!

for cases like this, writing

	"[" + re.escape(charset) + "]"

is usually a good way to avoid repeated oops:ing.

 > newString= re.split("[; ()\[\]", result)

 >>> newString= re.split("[; ()\[\]", result)
Traceback (most recent call last):
    ...
sre_constants.error: unexpected end of regular expression

</F>



From bj_666 at gmx.net  Thu Nov  2 10:40:48 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 02 Nov 2006 16:40:48 +0100
Subject: creating new objects with references to them
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.02.15.40.48.470131@gmx.net>

In <1162480549.786082.290980 at b28g2000cwb.googlegroups.com>, JohnJSal
wrote:

> What I don't know how to do is handle this arbitrary number of objects.
> When it comes time to save the data to the DB, how do I access each
> object (to get the text fields associated with each)? Won't I have to
> have given each instance some name? Or is there some other way to do
> this? Simply creating a new instance each time the user presses "New
> Record" won't be good enough, because how do I retain a reference to
> that instance over the course of the program, even after a second or
> third instance has been created?

Put your objects into a list.  Each time the user presses the `New` Button
append a new researcher object to it.

Ciao,
	Marc 'BlackJack' Rintsch


From triode at xnet.co.nz  Thu Nov 30 17:05:13 2006
From: triode at xnet.co.nz (triode at xnet.co.nz)
Date: 30 Nov 2006 14:05:13 -0800
Subject: detecting that a SQL db is running
In-Reply-To: <yHwbh.5596$1s6.1015@newsread2.news.pas.earthlink.net>
References: <783tm2dmb6brnptr91hsfnc1t38u1utbi8@4ax.com>
	<yHwbh.5596$1s6.1015@newsread2.news.pas.earthlink.net>
Message-ID: <1164924313.495569.311330@80g2000cwy.googlegroups.com>

Sorry if i did not make myself clear.  let me try again.

1. I have a series of servers running windows server 2003.
2  on each server there is an application running that communicates
with remote devices using email.
3. this application is made up from a series of modules that also
extract data from a local MSDE db.
4. this application pulls emails from remote devices,  interrogates a
the DB,  then passes on an XML message to a central server.
5.  I am intercepting  these XML messages to insert additional data
that I extract from the DB,  and then forward on to another
application.  Call this my local app.

The problem that I have is that the original application occasionally
hangs,  causing the DB to stop.  I have ASR routines in place to
re-boot the server when this happens.

I can detect when the db is up and not responding,  however,  if the DB
does not start at all,  my local application hangs.  I need to find a
way to determine if the DB has started,  that's all.

if any of you have any insight into how I can detect that the DB has
started as is running,  that would be very useful.

any contributions,  most gratefully received.

kind regards

bill



From timothy at open-networks.net  Thu Nov  9 03:46:53 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 09 Nov 2006 18:46:53 +1000
Subject: opening excel
In-Reply-To: <1163058244.735201.62830@h48g2000cwc.googlegroups.com>
References: <4552d34b$1@quokka.wn.com.au>
	<1163058244.735201.62830@h48g2000cwc.googlegroups.com>
Message-ID: <4552ea87@quokka.wn.com.au>

John Machin wrote:
> timmy wrote:
> 
>>Hello,
>>
>>has anybody got any experience opening and manilpulating excel
>>spreedsheets via python? it seems pythoncom allows this to happen but
>>i'm a total newb to it. (i usually work in the unix world)
>>all i need to do, is open the xls files and read values from it.
> 
> 
> If you really mean "read" rather than "manipulate", have a look at the
> xlrd package (of which I'm the author).
> 
> http://www.python.org/pypi/xlrd
> 
> BTW, it's pure Python; you can run it on your unix box if you like :-)
> 
> Cheers,
> John
> 

sweet thats what i'd like to do


From nick at craig-wood.com  Tue Nov 14 12:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 14 Nov 2006 11:30:04 -0600
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>
	<12lj35aqa9drd8a@corp.supernews.com>
	<slrnelj996.paq.nick@irishsea.home.craig-wood.com>
	<mailman.134.1163504733.32031.python-list@python.org>
Message-ID: <slrneljt4b.vim.nick@irishsea.home.craig-wood.com>

Fredrik Lundh <fredrik at pythonware.com> wrote:
>  Nick Craig-Wood wrote:
> 
> >   The only sensible things you can do from a signal handler is set a
> >   global flag, or call sem_post on a semaphore, to record the delivery
> >   of the signal. The remainder of the program can then either poll the
> >   global flag, or use sem_wait() and sem_trywait() on the semaphore.
> 
>  but that's exactly what Python's signal handlers do, right ?
> 
>  (the interpreter uses a "pending call" queue to collect events, and 
>  executes them from the interpreter main loop in a controlled
>  fashion).

Yes you are absolutely right

>From http://docs.python.org/lib/module-signal.html

    Some care must be taken if both signals and threads are used in
    the same program. The fundamental thing to remember in using
    signals and threads simultaneously is: always perform signal()
    operations in the main thread of execution. Any thread can perform
    an alarm(), getsignal(), or pause(); only the main thread can set
    a new signal handler, and the main thread will be the only one to
    receive signals (this is enforced by the Python signal module,
    even if the underlying thread implementation supports sending
    signals to individual threads). This means that signals can't be
    used as a means of inter-thread communication. Use locks instead.

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


From tuomas.vesterinen at pp.inet.fi  Mon Nov  6 08:03:55 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Mon, 06 Nov 2006 13:03:55 GMT
Subject: forwarding *arg parameter
In-Reply-To: <pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
	<eilc3m$301a$1@ulysses.news.tiscali.de>
	<y2r3h.244$7b6.238@read3.inet.fi>
	<pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>
Message-ID: <%oG3h.107$8a7.65@read3.inet.fi>

Steven D'Aprano wrote:
> On Sun, 05 Nov 2006 19:35:58 +0000, Tuomas wrote:
> 
> 
>>Thanks. My solution became:
>>
>> >>> def flattern(arg):
>>...     result = []
>>...     for item in arg:
>>...         if isinstance(item, (list, tuple)):
>>...             result.extend(flattern(item))
>>...         else:
>>...             result.append(item)
>>...     return tuple(result)
>>...
>> >>> def g(*arg):
>>...     arg = flattern(arg)
>>...     return arg
>>...
>> >>> def f(*arg):
>>...     return g(arg)
>>...
>> >>> f('foo', 'bar')
>>('foo', 'bar')
> 
> 
> 
> That's the most complicated do-nothing function I've ever seen. Here is a
> shorter version:
> 
> def shortf(*args):
>     return args
> 
> 
> 
>>>>f('foo', 'bar')
> 
> ('foo', 'bar')
> 
>>>>shortf('foo', 'bar')
> 
> ('foo', 'bar')
> 
> 
>>>>f(1,2,3,4)
> 
> (1, 2, 3, 4)
> 
>>>>shortf(1,2,3,4)
> 
> (1, 2, 3, 4)
> 
> 
>>>>f({}, None, 1, -1.2, "hello world")
> 
> ({}, None, 1, -1.2, 'hello world')
> 
>>>>shortf({}, None, 1, -1.2, "hello world")
> 
> ({}, None, 1, -1.2, 'hello world')
> 
> Actually, they aren't *quite* identical: your function rips lists apart,
> which is probably not a good idea.
> 
> 
>>>>f("foo", [1,2,3], None) # three arguments turns into five
> 
> ('foo', 1, 2, 3, None)
> 
>>>>shortf("foo", [1,2,3], None) # three arguments stays three
> 
> ('foo', [1, 2, 3], None)
> 
> 
> 
> I still don't understand why you are doing this. Can we have an example of
> why you think you need to do this?

If i redefine the function g the difference comes visible:

  >>> def g(*arg):
...     if with_flattern: arg=flattern(arg)
...     return arg

 >>> with_flattern=False
 >>> f('foo', 'bar')
(('foo', 'bar'),)
 >>> with_flattern=True
 >>> f('foo', 'bar')

If you read the whole chain you find out what we were talking of.

TV


From grahamd at dscpl.com.au  Tue Nov 14 06:07:00 2006
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 14 Nov 2006 03:07:00 -0800
Subject: mod_python installation problem ..severity High
References: <1163499937.692984.101720@h48g2000cwc.googlegroups.com>
Message-ID: <1163502420.173353.21060@k70g2000cwa.googlegroups.com>

boney wrote:
> On doing this and duly following the installation and testing
> instructions at www.modpython.org and then pointing the url as
> http://localhost/test/mptest.py, i get the following error on the
> server log file:
>
> [Tue Nov 14 15:17:47 2006] [error] make_obcallback: could not import
> mod_python.apache.\n
> [Tue Nov 14 15:17:47 2006] [error] make_obcallback: Python path being
> used "['C:\\\\Program Files\\\\Apache
> Group\\\\Apache2\\\\bin\\\\python24.zip', '.\\\\DLLs', '.\\\\lib',
> '.\\\\lib\\\\plat-win', '.\\\\lib\\\\lib-tk', 'C:\\\\Program
> Files\\\\Apache Group\\\\Apache2\\\\bin']".
> [Tue Nov 14 15:17:47 2006] [error] python_handler: no interpreter
> callback found.
> [Tue Nov 14 15:17:47 2006] [error] [client 127.0.0.1] python_handler:
> Can't get/create interpreter.

Your registry settings for Python do not include the site-packages
directory where mod_python typically gets installed. Thus, trying
updating the registry to add the site-packages directory. As a guide,
see the following post from the mod_python mailing list archive as a
guide.


http://www.modpython.org/pipermail/mod_python/2006-September/021979.html

This is for Python 2.5, but should give an indicator of what to look
for. Update the PythonPath entry.

For any mod_python help in the future, suggest you subscribe to the
mod_python mailing list and ask your question there as there is a
higher concentration of people there who are familiar with the
software. Details of the mod_python mailing list are on the mod_python
web site.

Graham



From steve at holdenweb.com  Thu Nov  2 10:36:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 15:36:59 +0000
Subject: creating new objects with references to them
In-Reply-To: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
Message-ID: <eid38l$ft7$1@sea.gmane.org>

JohnJSal wrote:
> It seems like what I want to do is something that programmers deal with
> everyday, but I just can't think of a way to do it. Basically, I am
> writing a DB front-end and I want a new "Researcher" object to be
> created whenever the user presses the "New Record" button. He can open
> as many new records at a time as he wants and fill in the information.
> 
Seems straightforward.

> What I don't know how to do is handle this arbitrary number of objects.
> When it comes time to save the data to the DB, how do I access each
> object (to get the text fields associated with each)? Won't I have to
> have given each instance some name? Or is there some other way to do
> this? Simply creating a new instance each time the user presses "New
> Record" won't be good enough, because how do I retain a reference to
> that instance over the course of the program, even after a second or
> third instance has been created?
> 
Start with an empty list, and append new instances to it. Then when the 
user indicated completion you can iterate over the list INSERTing them 
into the database (presumably INSERTing the new researcher's details first).

To minimize consistency problems it would help to make all of these 
insertions as a single database transaction.

> Hope that makes sense. It seems like such a common task.
> 
regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From aahz at pythoncraft.com  Tue Nov 14 10:46:00 2006
From: aahz at pythoncraft.com (Aahz)
Date: 14 Nov 2006 07:46:00 -0800
Subject: PyFAQ: anyone seen aahz' thread tutorial ?
References: <mailman.128.1163502991.32031.python-list@python.org>
Message-ID: <ejcobo$nfj$1@panix3.panix.com>

In article <mailman.128.1163502991.32031.python-list at python.org>,
Fredrik Lundh  <fredrik at pythonware.com> wrote:
>
>and yes, has anyone seen Aahz or his OSCON2001 thread tutorial slides 
>lately ?  as noticed here:
>
>     http://effbot.org/pyfaq/how-do-i-program-using-threads.htm
>
>they have disappeared from the starship?  any ideas where to look for them ?

Just a public note that I'm aware of the problem and have sent e-mail
privately to Fredrik, just haven't had enough cycles to fix it....
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From ptmcg at austin.rr._bogus_.com  Sat Nov 18 07:27:54 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 18 Nov 2006 12:27:54 GMT
Subject: MAKE GOOD MONEY BY INTERNET
References: <1163848933.731124.307470@e3g2000cwe.googlegroups.com>
Message-ID: <e%C7h.74$_H5.64@tornado.texas.rr.com>

Congratulations, Ciad, you have just posted your e-mail, that is 
claureal81 at yahoo.it, on Usenet, where it will get picked up by spammers the 
world over.  I hope you get your $6000+!!!, so you can spend it on bootleg, 
discount, old versions of MS Office, C.I.A.L.I.S, and discount 
PHAayrRMAcies.  Or perhaps forward it to Egineer Robson of Nigeria, who will 
happily send you 25hile of $US7.7Million all in 100 dollar bills in return. 
That e-mail again, claureal81 at yahoo.it.

Is there no way to filter this kind of junk, short of going to a moderated 
list?

-- Paul




From akhtarkhan06 at rediffmail.com  Tue Nov 28 05:48:31 2006
From: akhtarkhan06 at rediffmail.com (akhtar)
Date: 28 Nov 2006 02:48:31 -0800
Subject: How to secure your network
Message-ID: <1164710911.653304.34120@l39g2000cwd.googlegroups.com>

How to secure your network
Check this article to know how a network analyzer continuously monitors
traffic on network and provides detailed information about critical
problems, virus attacks and even generates traffic to stress test your
network
http://www.network-analyzer.blogspot.com



From deets at nospam.web.de  Thu Nov 23 11:00:49 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Nov 2006 17:00:49 +0100
Subject: Does only emacs and idle support symbolic debugging?
References: <mailman.647.1164297263.32031.python-list@python.org>
Message-ID: <4sluthFvvkteU1@mid.uni-berlin.de>

Victor Ng wrote:

> Subject line pretty much says it all - are those the only two editors
> that support running the symbolic debugger from inside the editor?

Nope, eric for example does as well. And I presume komodo will do that also.

Diez


From Sebastien.Boisgerault at gmail.com  Fri Nov 24 12:37:58 2006
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 24 Nov 2006 09:37:58 -0800
Subject: Pydev configuration
Message-ID: <1164389878.833569.60710@l39g2000cwd.googlegroups.com>

Hi,

Did anyone managed to change the code font family/size
in Pydev (Python Editor Plugin for Eclipse) ? I found how
to change the color mapping (Windows/Preference/Pydev)
but did not found the font setting.

Cheers,

SB



From ptmcg at austin.rr._bogus_.com  Mon Nov  6 05:36:34 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 06 Nov 2006 10:36:34 GMT
Subject: Python Distilled
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<pan.2006.11.06.10.11.35.335058@gmx.net>
Message-ID: <SeE3h.5944$lx6.4005@tornado.texas.rr.com>

"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:pan.2006.11.06.10.11.35.335058 at gmx.net...
> In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
> wrote:
>
>> I'd also like to remove any deprecated or stuff which is left in for
>> backwards functionality (eg Classic classes).
>
> Classic classes are still needed for exceptions:
>
>>>> class E(object):
> ...    pass
> ...
>>>> raise E
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> TypeError: exceptions must be classes, instances, or strings (deprecated),
> not type
>
> Ciao,
> Marc 'BlackJack' Rintsch

I thought exceptions were converted to new-style classes for Py2.5 
(http://docs.python.org/whatsnew/pep-352.html).  I've not upgraded yet, so 
cannot easily test this - under what version of Python was your posted code 
run?

-- Paul




From mccredie at gmail.com  Fri Nov 17 15:20:36 2006
From: mccredie at gmail.com (Matimus)
Date: 17 Nov 2006 12:20:36 -0800
Subject: remove a list from a list
In-Reply-To: <mailman.374.1163793666.32031.python-list@python.org>
References: <ejkv1u$ajf$1@sea.gmane.org><455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org> <455E0A20.9000509@tim.thechases.com>
	<ejl2re$ns3$1@sea.gmane.org> <455E100D.8030100@tim.thechases.com>
	<mailman.374.1163793666.32031.python-list@python.org>
Message-ID: <1163794836.375856.111350@j44g2000cwa.googlegroups.com>

> The solution so far is:
>
> for i in xrange(len(dirs), 0, -1):
>    if dirs[i-1].lower() in dirs_exclude:
>      del dirs[i-1]

This won't affect much, but uses better style I think.

Change:

for i in xrange(len(dirs),0,-1):

To:

for i in reversed(xrange(len(dirs))):

and then just use 'i' instead of 'i-1'



From bernhard.voigt at gmail.com  Tue Nov  7 11:58:50 2006
From: bernhard.voigt at gmail.com (bernhard.voigt at gmail.com)
Date: 7 Nov 2006 08:58:50 -0800
Subject: sound processing modules in python - anyone?
In-Reply-To: <1162909648.042525.172190@i42g2000cwa.googlegroups.com>
References: <mailman.4783.1162830903.11738.python-list@python.org>
	<mailman.1820.1162850780.11739.python-list@python.org>
	<1162909648.042525.172190@i42g2000cwa.googlegroups.com>
Message-ID: <1162918730.681389.55330@m7g2000cwm.googlegroups.com>

Hi,

you might want to take a look at pyaudio. A module to read and write
audio files. It is based on numpy and wraps the libsndfile library to
use it from python. With the capabilites of numpy and scipy you
probably have all you need.

Here's a link to pyaudio
http://www.ar.media.kyoto-u.ac.jp/members/david/softwares/pyaudio/index.html
Here you find numpy and scipy: http://scipy.org/SciPy

Enjoy! Bernhard



From jonas.esp at googlemail.com  Thu Nov 23 18:36:56 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 23 Nov 2006 15:36:56 -0800
Subject: Access to variable from external imported module
In-Reply-To: <ek57lv$5cd$1@news.albasani.net>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
	<ek57lv$5cd$1@news.albasani.net>
Message-ID: <1164325016.139659.271500@l12g2000cwl.googlegroups.com>

Thanks Robert, the best solution is get all local variables, else is
impossible access to them.

robert ha escrito:
> GinTon wrote:
> > I would to access to values that are created locally in that method
>
> after the method has executed? usually the return value?
> or you want to get all local variables, then make a func/method
>
> def f(a=1):
>     b=2
>     c=3
>     return locals()  #X/Object(locals())
> 
> --------
> 
> d=module.f()
> print d['c']         # d.c



From skip at pobox.com  Mon Nov  6 12:37:39 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 6 Nov 2006 11:37:39 -0600
Subject: missing collections module
In-Reply-To: <hcK3h.15398$cz.249447@ursa-nb00s0.nbnet.nb.ca>
References: <hcK3h.15398$cz.249447@ursa-nb00s0.nbnet.nb.ca>
Message-ID: <17743.29411.835485.300324@montanaro.dyndns.org>


    Shea> I am getting this error in a python script:
    Shea>    File "/usr/sfw/lib/python2.3/site-packages/BTL/cache.py", line 12, in ?
    Shea>      from collections import deque
    Shea> ImportError: No module named collections

    Shea> Where can I download the python collection module?

You're probably using a package which is not supported under Python 2.3.
The collections module is new with 2.4.  Try upgrading to 2.4 or 2.5.

Skip


From m.elston at advantest-ard.com  Thu Nov 16 20:38:28 2006
From: m.elston at advantest-ard.com (Mark Elston)
Date: Thu, 16 Nov 2006 17:38:28 -0800
Subject: Writing to Registry
In-Reply-To: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
References: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
Message-ID: <12lq4cishnjid23@corp.supernews.com>

Note:  this is untested (since I don't like screwing around
in the registry...)

Have you tried using REG_DWORD?

Mark
* Samantha wrote (on 11/16/2006 3:48 PM):
> I am working with this recipes:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66011
> 
> The problem I am having is setting a hex value.
> This line ---   SetValueEx(aKey,"MyNewKey",0, REG_SZ, 
> r"c:\winnt\explorer.exe")
> I want something Like --   SetValueEx(aKey,"MyNewSize",0, REG_SZ, 120 or 
> some value)
> Help would be appreciated.
> S
> 
> 


From pydecker at gmail.com  Fri Nov 10 22:48:27 2006
From: pydecker at gmail.com (Peter Decker)
Date: Fri, 10 Nov 2006 22:48:27 -0500
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163092380.301382.113470@m7g2000cwm.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
Message-ID: <ca55a9900611101948ib532308ld2e43e860edda2f5@mail.gmail.com>

On 9 Nov 2006 09:13:00 -0800, Dan Lenski <dlenski at gmail.com> wrote:

> Nick and John S., thank you for the tip on wxPython!  I'll look into it
> for my next project.  I too would avoid Qt, not because of the GPL but
> simply because I don't use KDE under Linux and because Qt is not well
> supported under Cygwin or on native Windows.  I too like to learn from
> actual printed books, so I'll check this one out.  O'Reilly should do a
> book on Python GUI stuff!
>
> John H.: thanks for pointing out pythoncard.  This looks like it might
> be an excellent substitute for LabView-like GUIs, which all my
> coworkers like.  I personally refuse to read or write LabView code, on
> the grounds that its syntax causes severe brain damage and is
> completely unportable.  But that's a flame for another thread, so to
> speak...

You should also take a look at Dabo. Like PythonCard, it wraps
wxPython, but it completely does away with the whole getter/setter
approach, the ugly ALL_CAPS_CONSTANTS that wxPython unfortunately
inherited from its C++ roots, and all those other non-Pythonic
irritants. While Dabo is a complete 3-tier framework for developing
database apps, you can just use the GUI tier. I don't do database
stuff, and so I just use the dabo.ui module.

Their URL is http://dabodev.com.

-- 

# p.d.


From robert.kern at gmail.com  Fri Nov 17 17:13:21 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 16:13:21 -0600
Subject: Decimal() instead of float?
In-Reply-To: <1163800304.5107.179.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>	<ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper>	<ejl5s5$334$1@sea.gmane.org>
	<1163800304.5107.179.camel@pepper>
Message-ID: <ejlc6f$n4t$1@sea.gmane.org>

Michael B. Trausch wrote:
> Perhaps you should not make assumptions; I am sure that you have heard
> what they do at some point before.  While *some* of the error doesn't
> propagate as expected (which is actually a problem in itself?equations
> no longer make sense if they are not mathematically balanced!) some
> does.  It is unpredictable and can't be tolerated when the numbers must
> come out exactly.

Okay, whatever your requirements are, Fredrik is certainly right in that you
don't know what you're talking about with respect to floating point arithmetic.
Please read the paper "What Every Computer Scientist Should Know About
Floating-Point Arithmetic":

  http://docs.sun.com/source/806-3568/ncg_goldberg.html

You would also do well to get a book on basic numerical analysis. If you have
any transcendental functions involved (and if you are computing distances
between geographical coordinates, you certainly will), you will encounter
numbers that are irrational; that is, they *cannot* be expressed exactly in any
finite form. Decimal() and GMP are *arbitrary* precision data types, not infinite.

I admit, I am curious now about the application that you think requires these
exact results. What operations are you actually performing? Surely there's a
square root or trig function in there somewhere.

-- 
Robert Kern

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



From deets at nospam.web.de  Sat Nov 25 10:21:34 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 25 Nov 2006 16:21:34 +0100
Subject: problem with global variable in a module
In-Reply-To: <1164463795.849460.124060@j72g2000cwa.googlegroups.com>
References: <1164463795.849460.124060@j72g2000cwa.googlegroups.com>
Message-ID: <4sr5bvF110fjlU1@mid.uni-berlin.de>

hollowspook schrieb:
> def aa():
>     global b
>     b=b+1
>     print b
> 
> b=1
> aa()
> 
> The above code runs well in python shell.
> 
> However I  have a problem as follows.
> 
> new a file named test.py
> ------------------------------------------------------------------------
> 
> def aa():
>     global b
>     b=b+1
>     print b
> -------------------------------------------------------------------------
> 
> Then in python shell,
> 
> from test import *
> b=1
> aa()
> 
> The error message is :
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "test.py", line 3, in aa
>     b=b+1
> NameError: global name 'b' is not defined
> 
> Why this happens? Please do me a favor. 

Because python does not know "real" globals - globals are always only
global on a module level. Now using the "from module import *"-syntax
asks for trouble. Because your global b above is global to the
__main__-module, not to the module test. But the aa-function expects it
to live in tests.

To make your example work, do it as this:

import test

test.b = 1
test.aa()


See
http://effbot.org/pyfaq/tutor-whats-the-difference-between-import-foo-and-from-foo-import.htm

Diez


From martin at v.loewis.de  Sun Nov  5 06:08:40 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 05 Nov 2006 12:08:40 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7x7iyafg85.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
	<7x7iyafg85.fsf@ruckus.brouhaha.com>
Message-ID: <454DC638.2050802@v.loewis.de>

Paul Rubin schrieb:
> I dunno about x86 hardware signals but these instructions do
> read-modify-write operaitons.  That means there has to be enough
> interlocking to prevent two cpu's from updating the same memory
> location simultaneously, which means the CPU's have to communicate.
> See <http://en.wikipedia.org/wiki/MESI_protocol> (I think this is
> how the current x86's do it):

Ah, but in the case where the lock# signal is used, it's known that
the data is not in the cache of the CPU performing the lock operation;
I believe it is also known that the data is not in the cache of any
other CPU. So the CPU performing the LOCK INC sequence just has
to perform two memory cycles. No cache coherency protocol runs
in that case.

But even when caching is involved, I don't see why there should be
more than three memory cycles. The MESI "protocol" really consists
only of two pins: HIT# and HITM#; the actual implementation is just
in keeping the state for each cache line, and in snooping. There
CPU's don't really "communicate". Instead, if one processor tries
to fill a cache line, the others snoop the read, and assert either
HIT# (when they have not modified their cache lines) or HITM#
(when they do have modified their cache lines). Assertions of
these signals is also immediate.

The worst case would be that one processor performs a LOCK INC,
and another processor has the modified value in its cache line.
So it needs to first flush the cache line, before the other
processor can modify the memory. If the memory is not cached
yet in another processor, the MESI protocol does not involve
additional penalties.

Regards,
Martin


From fredrik at pythonware.com  Thu Nov 16 13:15:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 19:15:37 +0100
Subject: Has anyone generated Open Office Calc XML  files from python
In-Reply-To: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
Message-ID: <eji9s9$bej$1@sea.gmane.org>

vj wrote:

> I have a program which generates xml files for excel but these files
> are not recognized by open office calc. I looked at the OO uno library,
> but it seems like an over kill.

this could be a start:

     http://ooopy.sourceforge.net/

</F>



From bill_maxwell_notMyRealAddress at notreal.net  Fri Nov 10 22:34:19 2006
From: bill_maxwell_notMyRealAddress at notreal.net (Bill Maxwell)
Date: Fri, 10 Nov 2006 22:34:19 -0500
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
	<1163139352.206221.213180@m73g2000cwd.googlegroups.com>
	<1163141290.868726.11330@h48g2000cwc.googlegroups.com>
Message-ID: <43hal2p6ep7vds2nl55uqil7v7i3guncl2@4ax.com>

On 9 Nov 2006 22:48:10 -0800, "John Henry" <john106henry at hotmail.com>
wrote:

>Upon closer look, the walkthrough did say:
>
>***************************
>from PythonCard import model
>
>Change that so it says:
>
>from PythonCard import dialog, model
>
>Save the code.
>***************************
>
>So, it works.


Thanks for looking into it.  It sounds like either it has been fixed in
the newer version -- or I didn't do something correctly.  It's been a
long time, and I was just going by the notes I made back then.









>
>
>
>John Henry wrote:
>> Bill Maxwell wrote:
>> > On 8 Nov 2006 11:49:07 -0800, "John Henry" <john106henry at hotmail.com>
>> > wrote:
>> >
>> > >
>> > >John Salerno wrote:
>> > >> Dan Lenski wrote:
>> > >>
>> > >> > So, is there another toolkit I should be looking at?
>> > >>
>> > >> I highly recommend wxPython. It's very mature, full-featured, and
>> > >> portable, and fairly easy to learn as well. I can't really compare it to
>> > >> other toolkits (not having used any of them, except Tkinter), but it's
>> > >> definitely one of the most popular and well-supported ones out there.
>> > >>
>> > >> http://www.wxpython.org/
>> > >
>> > >I highly recommend that you try PythonCard (which sits on top of
>> > >wxPython).  You can get productive very very quickly.  Take a look at:
>> > >
>> > >http://pythoncard.sourceforge.net/walkthrough1.html
>> >
>> >
>> > I took a brief look at PythonCard almost a year ago and got discouraged
>> > by what I found, so I stopped looking at it.  I've inserted my notes
>> > from back then, below.  Does anybody know if these things have been
>> > fixed in the latest release?
>> >
>> > Bill
>> >
>> >
>> > =====================================================================
>> > My notes from Fri Dec-23-2005:
>> >
>> > This is a list of gripes I have while trying to learn about PythonCard.
>> > I'm trying to investigate various GUI builders for Python, and
>> > PythonCard looks promising, but a lot of things are getting in the way.
>> >
>> > I installed yesterday, using this installer:
>> > PythonCard-0.8.1.FIXED.win32.exe
>> >
>> > A)  The very first example in the tutorial is wrong!
>> >
>> > 	On this page:  http://pythoncard.sourceforge.net/documentation.html
>> > 	When you follow this link to try something for the very first time:
>> >
>> > 		Getting Started in PythonCard by Dan Shafer:
>> > 			http://pythoncard.sourceforge.net/walkthrough1.html
>> >
>> > 	You quickly see that the minimal.py example doesn't even contain
>> > this line, even though the tutorial refers to it:
>> >
>>
>> I am not sure which one you are referring to but in the
>> PythonCard\samples\minimal, you will find a minimal.py that says:
>>
>> #!/usr/bin/python
>>
>> """
>> __version__ = "$Revision: 1.8 $"
>> __date__ = "$Date: 2005/12/17 15:20:02 $"
>> """
>>
>> from PythonCard import model
>>
>>
>> class Minimal(model.Background):
>>     def on_menuFileAbout_select(self, event):
>>         pass
>>
>> if __name__ == '__main__':
>>     app = model.Application(Minimal)
>>     app.MainLoop()
>>
>>
>>
>> > 		def on_menuFileAbout_select(self, event):
>> >
>> > 	And, of course, if you replace the word "pass" with this, as
>> > instructed:
>> >
>> > 		result = dialog.alertDialog(self, 'It works!', 'Showing Off')
>> >
>> > 	it won't run, because the existing "pass" line isn't inside a def
>> > inside of a class.
>> >
>>
>> No, it didn't work because the author forgot to mention that you have
>> to do a:
>>
>> from PythonCard import model, dialog
>>
>> instead of just:
>>
>> from PythonCard import model
>>
>> I just tried it and it works.
>>
>> >
>> > B)  Is the Notebook widget really supported?
>> >
>> > 	In the installed file "changelog.txt" (gets installed as part of
>> > PythonCard installation), it says:
>> >
>> > 		"added Notebook component, PageBackground, and testNotebook
>> >  		sample"
>> >
>> > 	But, the testNotebook sample is nowhere to be found.
>> >
>>
>> I haven't come across a need to use Notebook and so I can not say for
>> sure.  Looking at notebook.py, it appears to be just a simple wrapper
>> on top of the wxWindow notebook.  I would encourage you to post a
>> message to the mailing list and ask there.
>>
>>
>> > 	I looked lots of places, including the main SourceForge web site,
>> > and on the wiki, here:
>> >
>> > 		http://wiki.wxpython.org/index.cgi/PythonCard
>> >
>> > 	Both the main website and the wiki seem way out of date, and the
>> > latest dates I could find on both of them are sometime in 2004.
>> >
>>
>> Yes, sometime around 2004, the website updating stopped.   Fortunately,
>> development didn't.  There are quite a number of new things since then:
>> new resource editor (now call layout Editor, standalone exe creator,
>> and so forth).  I even learn that a new sizer handler is in the work.
>>
>> Not saying that there are 10 programmers working 7/24 on it.  It *is*
>> an Open Source project nevertheless.   Nobody gets paid for doing it.
>>  But there are development work going on.
>>
>>
>> > 	Finally, by following the mailing list archive link on the main
>> > website, I managed to find a reference to the notebook component on the
>> > ASPN site, where some guy named Brian wonders about the same thing as
>> > me, concerning the availability of the notebook component:
>> >
>> > 		http://aspn.activestate.com/ASPN/Mail/Message/pythoncard/2536825
>> >
>> > 	and, that message led me here:
>> >
>> > 		http://article.gmane.org/gmane.comp.python.pythoncard/1060
>> >
>> > 	where Kevin Altis admits that he forgot to include it in the 0.8.1
>> > release!  At least he provides a way to download it separately.  But,
>> > gheesh, this is pretty poor for a new user.  I was interested in using
>> > the notebook component right away, because I looked at the wxGlade
>> > tutorial before looking at PythonPage, and they use the notebook
>> > component in their example (and I decided I really want to use the
>> > component).
>> >
>> > 	To add insult to injury, after you download the zip file with the
>> > testNotebook stuff, the readme file says this:
>> >
>> > 		"Until we have a Notebook integrated into some of the other
>> > samples or tools this will serve as a basic test app, but I don't expect
>> > to include it in releases."
>> >
>>
>>
>> As with all Open Source projects, your mileage differs.   PythonCard
>> does what *I* need to get done - and allowed me to get it done in a
>> *hurry*.  May be you really need Notebook and may be it's true that
>> Notebook really doesn't work, I don't know.   But if you managed to get
>> it working, write it up and get it included.  That's what Open Source
>> Projects are all about.
>>
>>
>> > C)  Are the websites being maintained?
>>
>>
>> It appears that the maintainer of the web site stopped updating it
>> since late 2004.  I don't know why.   May be he's been busy.  May be he
>> got mad.  I don't know.   All I know is that I have been very
>> productive with what I need to get done (and earned a happy living with
>> the code I created) and I am very grateful to the people that worked on
>> it - past and present.
>>
>> I am not a "professional programmer" and so I probably can't contribute
>> to the development effort itself.   However, I've gotten pretty good in
>> using most of the package (other then Notebook, I admit).  So, if you
>> have any specific questions, please post it to the PythonCard list and
>> I'll try to help if I can.
>> 
>> Cheers.


From duncan.booth at invalid.invalid  Tue Nov 28 04:13:53 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 28 Nov 2006 09:13:53 GMT
Subject: Calling a thread asynchronously with a callback
References: <mailman.774.1164649819.32031.python-list@python.org>
	<4t0nr6F110supU1@mid.uni-berlin.de>
Message-ID: <Xns98895DF00E9E4duncanbooth@127.0.0.1>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

> Edwin Gomez wrote:
> 
>> I'm a C# developer and I'm new to Python.  I would like to know if
>> the concept of Asynchronous call-backs exists in Python.  Basically
>> what I mean is that I dispatch a thread and when the thread completes
>> it invokes a method from the calling thread.  Sort event driven
>> concept with threads. 
> 
> Counter question: does such a thing exist in C#, and if, is it bound
> to some existing event loop? 

Yes, or rather the concept exists in .Net. C# and other .Net languages 
don't actually allow pointers to functions, instead they implement 
callbacks using what are called Delegates: for each different function 
signature you need a new Delegate class, but the language compilers 
automate the process so that using Delegates becomes very similar to using 
function pointers.

In early C#:

// Delegate for function with no args and no results
public delegate void SimpleDelegate();
...
SimpleDelegate simpleDelegate = new SimpleDelegate(somefunc);
SimpleDelegate simpleDelegate = new SimpleDelegate(someobj.somefunc);
...
simpleDelegate();

C# 2.0 added the ability to declare delegates inline (i.e. anonymous 
functions), and delegate inferencing to avoid writing 'new delegatename' 
everywhere:

SimpleDelegate simpleDelegate = somefunc;

Where delegates start becoming more interesting than just function pointers 
is that all delegates support both multicasting and asynchronous callbacks.

You can add any number of functions into a delegate, and you can also 
remove functions from delegates.

Asynchronous callbacks are done by calling a delegate's BeginInvoke method. 
You have to pass this the same arguments as you would when calling the 
delegate directly, plus an AsyncCallback delegate and an object to be 
passed as part of the asynchronous response which is usually the original 
delegate. From the callback you can then call EndInvoke to get the result 
returned from the call to the function.

Now the bit you asked about: the callback happens on an arbitrary thread.

The .Net runtime maintains a thread pool to use for this sort of callback 
so it doesn't have the overhead of setting up a new thread every time. A 
lot of the system library classes support similar Beginxxx/Endxxx function 
pairs for potentially lengthy operations such as reading from a Stream, or 
performing a web request and the thread pool is also used for these.

It is fairly easy to implement a similar scheme in Python, just write a 
thread pool which gets function/argument/callback combinations from a 
queue, calls the function and then calls the callback with the response.

> I'm really curious, because having code being interrupted at any time
> by a asynchronous callback strikes me as dangerous. But then maybe I'm
> just a whimp :)

Not at all. It comes as a surprise to some people that there is no such 
thing in .Net as a single threaded program:

As well as asynchronous delegates the garbage collector uses separate 
threads: what it does is to block all threads from running while it sweeps 
the memory, compacting all moveable objects and releasing any unreferenced 
objects without finalizers. Unreferenced objects with finalizers are 
resurrected onto a list and then the garbage collector lets other threads 
run. A background thread is then used to call the finalizers for the 
collected objects and each finalizer is cleared once it has executed (so 
that unless resurrected, the next garbage collection of an appropriate 
generation can overwrite the object). What this means is that *all* 
finalizers in .Net will run on a different thread (and in arbitrary order): 
of course finalizers are pretty crippled so this may not matter.


From no-spam at no-spam-no-spam.invalid  Wed Nov  8 11:18:12 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 08 Nov 2006 17:18:12 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162992063.382185.5440@h48g2000cwc.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<1162939715.915139.146890@b28g2000cwb.googlegroups.com>
	<455166B6.6040009@v.loewis.de>
	<1162992063.382185.5440@h48g2000cwc.googlegroups.com>
Message-ID: <eit008$o3f$1@news.albasani.net>

Ross Ridge wrote:
> Ross Ridge schrieb:
>> So give an example where reference counting is unsafe.
> 
> Martin v. L?wis wrote:
>> Nobody claimed that, in that thread. Instead, the claim was
>> "Atomic increment and decrement instructions are not by themselves
>> sufficient to make reference counting safe."
> 
> So give an example of where atomic increment and decrement instructions
> are not by themselves sufficent to make reference counting safe.
> 
>> I did give an example, in <4550cc64$0$3462$9b622d9e at news.freenet.de>.
>> Even though f_name is reference-counted, it might happen that you get a
>> dangling pointer.
> 
> Your example is of how access to the "f_name" member is unsafe, not of
> how reference counting being unsafe.  The same sort of race condition
> can without reference counting being involved at all.  Consider the
> "f_fp" member: if one thread tries to use "printf()" on it while
> another thread calls "fclose()", then you can have same problem.  The
> race condition here doesn't happen because reference counting hasn't
> been made safe, nor does it happen because stdio isn't thread-safe.  It
> happens because accessing "f_fp" (without the GIL) is unsafe.
> 
> The problem your describing isn't that reference counting hasn't been
> made safe.  What you and Joe seem to be trying to say is that atomic
> increment and decrement instructions alone don't make accessing shared
> structure members safe.

Yes.

To recall the motivation and have a real world example: 
The idea to share/handover objects between 2 (N) well separated Python interpreter instances (free-threading) with 2 different GILs.
There is of course the usage condition: * Only one interpreter may access (read & write) the hot (tunneled) object tree at a time *
 (e.g. application: a numeric calc and when finished (flag) the other interpreter walks again the objects directly (without MPI/pickling))

But a key problem was, that the other thread can have old pointer objects (containers) pointing into the hot object tree - an there is shared use of (immutable) singleton objects (None,1,2...): The old pointer objects in other interpreter may disapear at any time or the pointers maybe be doubled.
Thus the refcount of hot object will count down/up out of the interpreter which has not possession of the hot object tree -   even if the pointers are not used for write/read access.

Only and truly if you have atomic Py_INCREF/Py_DECREF this is no problem. 

Before all interpreters have lost the object there will be no accidental disapearance of the object as Ross Ridge already pointed out. 
In addition concurrent read access to _constant_ objects/sub-trees would be possible, and also concurrent read&write access by using an explicit locking! 
Thus the original OP requirements would be fulfilled.

See so far only 5 main additional requirements to offer the possibility of separated GILs/free-threading interpreters:

* pointer to current GIL in threadstate and dynamic PyThreadState_GET() / currentthreadstate in TLS

* locks for global objects (file etc) of course, if they should be supported therefore. (I'd use the free-threading only for mere computations)

* enable the already existing obmalloc.c/LOCK&UNLOCK by something fast like:
_retry:
  __asm   LOCK INC malloc_lock
  if (malloc_lock!=1) { LOCK DEC malloc_lock; /*yield();*/ goto _retry; } 

* a special (LOCK INC) locking dict type for the global dict of extension modules
  (created clearly by Py_InitModule(name, methods) - thus that would also preserve backwards compatibility for extension C-code)

* nice tunnel functions to create extra interpreters and for actually tunneling the objects and maybe offering the fast locking-dict type to enable a fast sharing of the hot tunneled object tree.

Speed costs? Probably not much as far as the discussion in this thread sounds...

Of course this option of 2 interpreters - though easy to use - would still be for power use cases only: A Python programming bug doing accidential unlocked concurrent access into a hot tunneled tree can cause a C-level crash.  (This cannot happen so far with simple Python threading - you'd only get inconsistent data or a Python exception. But of course you can crash already now at C-level by using the Python standard library  :-) ). 
That danger would be ok for me so far. Conceptually its not more complicated that using locks right in normal Python thread programming - only the effect of bugs will more critical ...

If one thinks about overcoming the GIL at all - we are probably not far away. Mainly:

* make the locking dict type (and locking list type) the common case - the non-locking obsolete or for optimization only

* lock some other non-constant types which are not already mainly dicts/lists. most objects which' access-functions only change INTEGERS etc and call threadsafe C-lib functions etc don't require extra locking

Maybe the separated-GIL/interpreter-method can be a bridge to that. 
Refcounting probably doen't necessarily block that road.

Really interesting would be to make an experiment about the speed costs of LOCK INC. Guess the hot spot regarding recounting will be Py_None's cache line (on multi core CPUs with separated cache per core). 


Robert


From sjmachin at lexicon.net  Tue Nov 21 20:16:28 2006
From: sjmachin at lexicon.net (John Machin)
Date: 21 Nov 2006 17:16:28 -0800
Subject: AVL Balancing
In-Reply-To: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
References: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
Message-ID: <1164158188.787394.25990@b28g2000cwb.googlegroups.com>


scba... at gmail.com wrote:
> Im working on an AVL tree

Is this homework?

> that consists of balancing the tree everytime
> you add an object.

That's a peculiar kind of AVL tree. Normally it is *not* necessary to
balance the tree every time a node is added -- it's done only if a
constraint is breached.

> Im not quite grasping the concept on how to do this
> with python.

Could you do it in any other language?

> I have seen a few topics on the web about this, and i
> clearly understand how when the balance of an AVL tree get to 2 or -2
> you have to do a R, L, LR, or a RL rotation. Could anyone possibly help
> me/point me in the right direction as far as checking the balance and
> actually balancing the tree? Thanks in advance

Perhaps if you could show us what you have done already -- I'd be
expecting a class to represent a node, and maybe another to represent
the root of the tree -- and give us an idea of your Python proficency
level (so that we can tailor the advice accordingly), we could help
you.

Regards,
John



From gagsl-py at yahoo.com.ar  Fri Nov 10 17:42:45 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 19:42:45 -0300
Subject: newbee I have an object how to check what's his class?
In-Reply-To: <ej2pic$ore$1@ultra60.mat.uni.torun.pl>
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
	<1163171613.040825.78290@m73g2000cwd.googlegroups.com>
	<ej2b34$9nk$1@ultra60.mat.uni.torun.pl>
	<pan.2006.11.10.17.13.58.663930@gmx.net>
	<ej2pic$ore$1@ultra60.mat.uni.torun.pl>
Message-ID: <7.0.1.0.0.20061110193222.0495a280@yahoo.com.ar>

At Friday 10/11/2006 18:05, consternation wrote:

>def __init__
>  self.mem={}
>I googled a way how  to add elements to dict,  I have read the code not the
>description below

self.mem[key] = value

I strongly suggest you read some introductory Python docs, like 
http://docs.python.org/tut/tut.html or http://www.diveintopython.org

>isinstance(x,X)
>True                :-)
>type(x) is X
>False                :( ??
>__main__.X
>X
>  temporarily it solves my probblems I'm just curious why type can't handle
>the test.

You still didn't show enough code, but I bet that X is an old-style 
class, that is, you wrote:
class X: blablabla
instead of
class X(object): blablabla
For old-style class instances, type(x) is InstanceType, not the actual class.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From cyberco at gmail.com  Mon Nov 20 03:26:14 2006
From: cyberco at gmail.com (cyberco)
Date: 20 Nov 2006 00:26:14 -0800
Subject: fileinput.input('test.txt') => ERROR: input() already active
Message-ID: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>

Using fileinput.input('test.txt') I probably forgot to process all
lines or so, since I get the error 'input() already active' when i try
to call fileinput.input('test.txt') again. But how can I 'close' the
previous version I opened? I have no handle to it or so...



From ardsrk at gmail.com  Sat Nov  4 07:57:51 2006
From: ardsrk at gmail.com (ArdPy)
Date: 4 Nov 2006 04:57:51 -0800
Subject: Really strange behavior
In-Reply-To: <pan.2006.11.04.12.02.26.532144@yahoo.it>
References: <pan.2006.11.04.12.02.26.532144@yahoo.it>
Message-ID: <1162645071.162131.194070@h48g2000cwc.googlegroups.com>


IloChab wrote:
> Sorry I wasn't able to be more specific on my topic but I really do not
> know how to classify my  problem, I mean that I can't understand if it's
> a python
> or a twisted
> or a Qt4
> problem
> I'm trying to run a simple application with Twisted and Qt4.
> To do this I downloaded this:
>     http://twistedmatrix.com/trac/attachment/ticket/1770/qt4reactor.py
> Now,
> if I run this:
> # >>>>>>>>>
> import  qt4reactor
> import sys
> from PyQt4 import  QtGui
> from winIum import Window
>
> def main():
>     app = QtGui.QApplication(sys.argv)
>     qt4reactor.install(app)
>     MainWindow = QtGui.QMainWindow()
>     win = Window(MainWindow)
>     MainWindow.show()
>     from twisted.internet import reactor
>     reactor.run()
> # <<<<<<<<
> my window shows and run correctly.
>
> If I run this:
> # >>>>>>>>>>>>>
> import  qt4reactor
> import sys
> from PyQt4 import  QtGui
> from winIum import Window
>
> def creApp():
>     app = QtGui.QApplication(sys.argv)
>     qt4reactor.install(app)
>     retrun app
> def creWin():
>     MainWindow = QtGui.QMainWindow()
>     win = Window(MainWindow)
>     MainWindow.show()
> def main():
>     app = creApp()
>     creWin()
>     from twisted.internet import reactor
>     reactor.run()
> # <<<<<<<<<<<<<
> my window doesn't show and the script doesn't stop but remains trapped in
> some gui loop.
>
> What's the problem I can't see??
>
> Thank you in advance for any help.
> Licia

Well the only problem according to me could be with the 'from
twisted.internet import reactor' statement.
Try putting this at the beginning of the script. Might be it will work
just fine...



From Thomas.Ploch at gmx.net  Thu Nov 30 15:34:11 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 21:34:11 +0100
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164917869.978435.63370@f1g2000cwa.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>	<mailman.896.1164917235.32031.python-list@python.org>
	<1164917869.978435.63370@f1g2000cwa.googlegroups.com>
Message-ID: <456F4043.2060208@gmx.net>

John Henry schrieb:
> Thomas Ploch wrote:
> <snip>
>> I had a little bit of fun while writing this:
>>
>> itemList = (a,b,c1,c2,c3,d1,d2,d3,d4,d5) and
>> itemList2 = (a1,a2,a3,b,c,d1,d2,d3,d4,d5) the next time.
>>
> 
> Huh?  What's a,b,....d5?
> 

John Henry schrieb:
> > Thomas Ploch wrote:
> > <snip>
>> >> I had a little bit of fun while writing this:
>> >>
>> >> itemList = (a,b,c1,c2,c3,d1,d2,d3,d4,d5) and
>> >> itemList2 = (a1,a2,a3,b,c,d1,d2,d3,d4,d5) the next time.
>> >>
> >
> > Huh?  What's a,b,....d5?
> >

Can be any object, as you had in your example in your mail:

>>>If I have a list of say, 10 elements and I need to slice it into
>>> irregular size list, I would have to create a bunch of temporary
>>> variables and then regroup them afterwords, like:
>>>
>>> # Just for illustration. Alist can be any existing 10 element list
>>> a_list=("",)*10
>>> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
>>> alist=(a,)
>>> blist=(b,)
>>> clist=(c1,c2,c3)
>>> dlist=(d2,d3,d4,d5)

>> def getSlices(aCount, bCount, cCount, dCount, items):
>>     a,b,c,d = (items[0:aCount],
>>                 items[aCount:aCount+bCount],
>>                 items[aCount+bCount:aCount+bCount+cCount],
>> 		item[aCount+bCount+cCount:aCount+bCount+cCount+dCount])
> 
> You meant "items" here, right?
> 
>>     return list(a),list(b),list(c),list(d)
>>
>>>>> a,b,c,d = getSlices(1,1,3,5,itemList)
>>>>> print a,b,c,d
>> ['a'] ['b'] ['c1', 'c2', 'c3'] ['d1', 'd2', 'd3', 'd4', 'd5']
>>
>>>>> a,b,c,d = getSlices(3,1,1,0,itemList2)
>>>>> print a,b,c,d
>> ['a1', 'a2', 'a3'] ['b'] ['c'] []
>>
>> %-)
>>
>> Thomas
> 



From bearophileHUGS at lycos.com  Thu Nov  2 02:09:39 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Nov 2006 23:09:39 -0800
Subject: Style for modules with lots of constants
In-Reply-To: <mailman.1626.1162422015.11739.python-list@python.org>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<1162398506.919161.145290@m7g2000cwm.googlegroups.com>
	<slrnekhjt8.1ok.horpner@FIAD06.norwich.edu>
	<mailman.1626.1162422015.11739.python-list@python.org>
Message-ID: <1162451379.767949.107720@h48g2000cwc.googlegroups.com>

Ron Adam:
> The disadvantage is an invalid flag may pass silently unless you do some sort of
> validation which may slow things down a bit.

That string validation is usually necessary.

Bye,
bearophile



From brenNOSPAMbarn at NObrenSPAMbarn.net  Mon Nov 27 23:12:39 2006
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Tue, 28 Nov 2006 04:12:39 GMT
Subject: Inheritance from builtin list and override of methods.
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr>
	<ekecd9$e8c$1@sea.gmane.org>
	<mailman.768.1164637881.32031.python-list@python.org>
	<Xns988896361B9C5duncanbooth@127.0.0.1>
	<Xns9888724C01B78OKB@199.45.49.11>
	<mailman.779.1164656450.32031.python-list@python.org>
Message-ID: <Xns9888CD96B985AOKB@199.45.49.11>

Carsten Haese wrote:

> You can change the behavior of a list's sort method by overriding
> sort. You can't change the behavior of sort by overriding
> __getitem__ and __setitem__, because sort does not call __getitem__
> or __setitem__. 

    	Why doesn't it?

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From jblaine at mitre.org  Wed Nov  1 15:57:23 2006
From: jblaine at mitre.org (Jeff Blaine)
Date: Wed, 01 Nov 2006 15:57:23 -0500
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <eib0la$86i$1@newslocal.mitre.org>
References: <eib0la$86i$1@newslocal.mitre.org>
Message-ID: <eib1nk$8lp$1@newslocal.mitre.org>

I see what's wrong.  Me.  Wow am I ever rusty.

Jeff Blaine wrote:
> It's been a year or so since I written Python code, so maybe
> I am just doing something really dumb, but...
> 
> Documentation
> =============
> 
>     class DictReader(csvfile[,fieldnames=None,
>              [,restkey=None[, restval=None[, dialect='excel'
>              [, *args, **kwds]]]]])
> 
> 
>     Create an object which operates like a regular reader
>     but maps the information read into a dict whose keys
>     are given by the optional fieldnames parameter. If the
>     fieldnames parameter is omitted, the values in the
>     first row of the csvfile will be used as the fieldnames.
> 
> Code
> ====
> 
>     import csv
> 
>     r = csv.DictReader('C:\Temp\Book1.csv')
>     print r.next()
>     # EOF
> 
> Output
> ======
> 
>     {'C': ':'}


From klaus at seistrup.dk  Tue Nov 21 14:23:36 2006
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Tue, 21 Nov 2006 19:23:36 +0000 (UTC)
Subject: How to sort list
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
Message-ID: <ejvjno$549$2@minji.szn.dk>

Lad <python at hope.cz> wrote:

> I have a list of emails and I would like to sorted that list by 
> domains
> E.g.
> If the list is
>
> Emails=['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com',....]
>
> after sorting I would like to have
> Emails=['a at hotmail.com','b at hotmail.com','a at yahoo.com','c at yahoo.com',....]
>
> What is the best/easiest way?

Decorate-sort-undecorate?

#v+

array = []

for addr in Emails:
  (user, domain) = addr.split('@')
  array.append((domain, user, addr))
# end for

array.sort()

SortedEmails = [addr for (user, domain, addr) in array]

#v-

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/


From gagsl-py at yahoo.com.ar  Wed Nov 29 03:06:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 05:06:25 -0300
Subject: Using SimpleXMLRPCServer in a Windows Service
In-Reply-To: <60987dac0611280049t4138334r13ddbfb7c7236b5b@mail.gmail.com
 >
References: <60987dac0611230152r4af42ce6mfbbaf5a4409537ee@mail.gmail.com>
	<7.0.1.0.0.20061125003821.034c9810@yahoo.com.ar>
	<60987dac0611280049t4138334r13ddbfb7c7236b5b@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061129050330.04d37770@yahoo.com.ar>

At Tuesday 28/11/2006 05:49, Rudy Schockaert wrote:

>I found the problem.
>Actually both pieces of code work now. The problem was that when I run
>the SimpleXMLRPCService in a Windows Service, the STDERR needs to be
>redirected to a real file. I guess some kind of buffer overflow occurs
>when you don't do this.
>
>I added the following lines:
>
><snip>
>def SvcStop(self):
>    sys.stdout = self.stdout
>    sys.stderr = self.stderr
>    .....
>
>
>def SvcDoRun(self):
>    self.stdout = sys.stdout
>    self.stderr = sys.stderr
>    sys.stdout = file("c:/temp/my.log", "a+", 0)
>    sys.stderr = sys.stderr
>    ....
></snip>

Actually you don't have to restore the previous value; Python already 
saves the original value in sys.__stderr__ and restores it when 
program finishes.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From duncan.booth at invalid.invalid  Thu Nov 30 08:09:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 Nov 2006 13:09:11 GMT
Subject: Slicing versus loops, was Re: for i in range() anti-pattern
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
	<ekmb29$hj3$02$1@news.t-online.com>
	<pan.2006.11.30.12.59.43.951671@REMOVE.THIS.cybersource.com.au>
Message-ID: <Xns988B85B2BD3F3duncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:

> Everybody always forgets corner cases... like lists with odd number of
> items... *wink*
> 
I didn't forget. I just assumed that raising an exception was a more useful 
response.

> Here is a version that handles both odd and even length lists:
> 
> def swap_slice(items):
>     left = items[:len(items)-1:2]
>     items[:len(items)-1:2] = items[1::2]
>     items[1::2] = left
>     return items
> 
I guess a viable alternative to raising an exception would be to pad the 
list to even length:

[1, 2, 3] -> [2, 1, Padding, 3]

for some value of Padding. I don't think I would expect swap_slice to 
silently fail to swap the last element.


From ytlim1 at gmail.com  Sat Nov 18 16:44:27 2006
From: ytlim1 at gmail.com (Why Tea)
Date: 18 Nov 2006 13:44:27 -0800
Subject: print with variable justification (with *)
In-Reply-To: <pan.2006.11.18.21.07.00.175065@gmx.net>
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
	<pan.2006.11.18.21.07.00.175065@gmx.net>
Message-ID: <1163886267.733427.108740@j44g2000cwa.googlegroups.com>

> In [50]: '%*s' % (5, 'spam')
> Out[50]: ' spam'
> 

Marc, that's exactly what I need. Thanks!

/Why Tea



From xah at xahlee.org  Wed Nov  1 05:35:08 2006
From: xah at xahlee.org (Xah Lee)
Date: 1 Nov 2006 02:35:08 -0800
Subject: logo design
In-Reply-To: <1162270625.966859.194730@m73g2000cwd.googlegroups.com>
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
Message-ID: <1162377308.044332.212610@i42g2000cwa.googlegroups.com>

No personal offense intended, but human animal's history is what? 3000
years at least in recorded history? And, all you can think of is what,
the view points of a fraction of your personal life span?

Have you looked into, the history of fashions, icons, their roles and
social significance, before you embarked and embraced on your above-it
attitude about why should or should not your pet language lisp have a
logo?

As per more detailed reasons on the meaning of logos, it's social
significance, its role in modern society, the defining characteristics
of logo design, and why LISP needs a logo, i'll post a reply to this
thread wthin a month.

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

mark.hoemmen at gmail.com wrote:
> On Oct 28, 10:24 pm, "Xah Lee" <x... at xahlee.org> wrote:
> > I have brought this topic here here before... that i think LISP really
> > need to have a logo.
>
> No offense intended, but were you around in 1959 or so?  The way
> that time passes in the computer science world, having a logo for
> Lisp is like having a logo for the abacus ;)  Besides, who are _we_
> to go back and impose our modern ideas of what looks "slick" and
> pretty on the great thinkers of an earlier age?  Should we make a
> logo for the Pythagorean Theorem or for Newton's Three Laws?
>
> > Python, did not really have a logo. I made a plaint more than once in
> > different periods of times to comp.lang.python. Them tech geeking
> > morons and assholes, as expected, made irrelevant and incoherent cries.
>
> I personally have a lot of respect for Python hackers and I think
> you should too.  We Lispers should show our greatness by not
> stooping to such insults ;)
> 
> mfh



From bugs at almad.net  Mon Nov  6 05:04:12 2006
From: bugs at almad.net (Almad)
Date: 6 Nov 2006 02:04:12 -0800
Subject: Problem with XML-RPC not mounted in /
Message-ID: <1162807451.890014.307850@k70g2000cwa.googlegroups.com>

Hi,

I'm trying to build XML-RPC service, both server and client library.

My server is CherryPy with XML-RPC filter. I have here method
registration_ip. When it's in, say http://ws.rpgplanet.nerv/,
everything is OK, but when I move it in http://ws.rpgplanet.nerv/main/,
this behaviour occur:

 srv = ServerProxy('http://ws.rpgplanet.nerv/main/')
 print srv.register_ip("guest")

raises 404, as according to log, library is trying to access /main/
instead of /main/register_ip

 srv = ServerProxy('http://ws.rpgplanet.nerv/')
 print srv.main.register_ip("guest")

raises 500, as client is correctly hitting /main/register_ip, but NOT
sending "guest" argument.

I'm probably missing something obvious, so where should problem be? Is
it not possible for XML-RPC to live not in / ?

Thank You for advices,

Almad



From bignose+hates-spam at benfinney.id.au  Thu Nov 23 23:34:16 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 24 Nov 2006 15:34:16 +1100
Subject: beginner question about range with list and list
References: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>
Message-ID: <87vel5tqd3.fsf@benfinney.id.au>

"erik gartz" <eegunnar at yahoo.com> writes:

> Doesn't {} allocate new memory for the dictionary each time? It
> almost appears as if the 2nd dictionary created overwrites the first
> one.

    <URL:http://effbot.org/pyfaq/how-do-i-create-a-multidimensional-list.htm>

-- 
 \        "There are only two ways to live your life. One is as though |
  `\      nothing is a miracle. The other is as if everything is."  -- |
_o__)                                                  Albert Einstein |
Ben Finney



From walterbyrd at iname.com  Thu Nov  2 21:06:26 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 2 Nov 2006 18:06:26 -0800
Subject: is mod_python borked?
In-Reply-To: <1162509979.221261.192440@m7g2000cwm.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
	<1162509979.221261.192440@m7g2000cwm.googlegroups.com>
Message-ID: <1162519586.681243.301550@h48g2000cwc.googlegroups.com>


grahamd at dscpl.com.au wrote:

> One of the biggest problems is that a lot of ISPs still use Apache 1.3
> and so only mod_python 2.7.X is available on those platforms.

Yes, I think that is a big problem. I don't think django or turbogears
will work with apache 1.3. And it seems to me that practically all
web-hosters use apache 1.3.

*sigh* maybe I'll just use php until the web-hosters catch up, if they
ever do.



From nicogrubert at gmail.com  Thu Nov 23 09:05:14 2006
From: nicogrubert at gmail.com (Nico Grubert)
Date: Thu, 23 Nov 2006 15:05:14 +0100
Subject: ldapsearch example in python-ldap?
Message-ID: <4565AA9A.5050902@gmail.com>

Hi there,

on a linux machine I am running this ldapsearch from the command line:

ldapsearch -x -h myldaphost.mydomain.com \
   -D "CN=ldapuser,CN=Users,DC=mydomain,DC=com" -w "secret" \
   -b "CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com"

How can I do this with python-ldap?

Regards,
    Nico


From cameron.walsh at gmail.com  Thu Nov 30 20:42:41 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 01 Dec 2006 09:42:41 +0800
Subject: PIL throws exception when reading bitmap/pnm data
In-Reply-To: <ekjes3$2gp$1@enyo.uwa.edu.au>
References: <ekjes3$2gp$1@enyo.uwa.edu.au>
Message-ID: <eko18o$iu9$1@enyo.uwa.edu.au>

Cameron Walsh wrote:
> Hi all,
> 
> I'm trying to extract the data from a bitmap or .pnm file using the
> following code:
> 
> import Image
> img = Image.open("test.bmp","r")
> data=img.getdata()
> 
> Unfortunately I get the following exception on Linux, but not on Windows:
> 
>>>> data=img.getdata()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/local/lib/python2.5/site-packages/PIL/Image.py", line 796,
> in getdata
>     self.load()
>   File "/usr/local/lib/python2.5/site-packages/PIL/ImageFile.py", line
> 147, in load
>     self.map = mmap.mmap(file.fileno(), size)
> EnvironmentError: [Errno 19] No such device
> 
<SNIP>
> 
> 
> Thanks and regards,
> 
> Cameron.


Hi all,

It turns out the problem only arose when the file was on an NTFS drive
mounted as NTFS-3g.  Copying it to my home directory fixed the problem.

Who do I send the bug report to, the ntfs-3g or the PIL guys?

Regards,

Cameron.


From walterbyrd at iname.com  Tue Nov 14 14:38:46 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 14 Nov 2006 11:38:46 -0800
Subject: Python v PHP: fair comparison?
Message-ID: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>

I don't know if this is a fair comparison or not. Any comments
appreciated.

- Python is more readable, and more general purpose
- PHP has awful backward compatibility
- PHP has a lower barrier to entry
- Most inexpensive web-hosters support PHP, but not Python
- PHP has far more pre-writen scripts available
- Newer versions of mod_python require Apache 2.0, which few hosters
have
- There is more demand for PHP developers, than Python developers



From Leo.Kislov at gmail.com  Tue Nov 28 06:45:59 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 03:45:59 -0800
Subject: os.walk return hex excapes
References: <mailman.798.1164713355.32031.python-list@python.org>
Message-ID: <1164714359.370358.316870@j72g2000cwa.googlegroups.com>

Alex S wrote:
> Hi,
> os.walk return hex excape sequence inside a files name, and when i try
> to feed it back to os.remove i get
>
> OSError: [Errno 22] Invalid argument:
> 'C:\\Temp\\?p?\xbfS\xbf\xac?G\xaba ACDSee \xbb?a??n a???\xac\xb5\xbfn.exe'

It's not escape sequences that are the problem but question marks, I
suspect. Most likely this file name contains characters not in your
locale's language. To access this file name you need to use unicode,
just make sure the first parameter of os.walk is a unicode string, for
example: os.walk(u'c:\\temp'). The exact code how to make the first
parameter unicode depends on where it is coming from (network, config
file, registry, etc...) Reading unicode tutorial is highly recommended.

  -- Leo



From jcoleman at franciscan.edu  Thu Nov  2 16:56:42 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 2 Nov 2006 13:56:42 -0800
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1694.1162503933.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<mailman.1677.1162490601.11739.python-list@python.org>
	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>
	<eideec$tk8$1@sea.gmane.org> <eidlpc$qfi$1@sea.gmane.org>
	<mailman.1690.1162501294.11739.python-list@python.org>
	<1162502997.175322.171730@e3g2000cwe.googlegroups.com>
	<mailman.1694.1162503933.11739.python-list@python.org>
Message-ID: <1162504602.877056.114150@h48g2000cwc.googlegroups.com>


Robert Kern wrote:
> John Coleman wrote:
> > Maybe I don't know what I'm looking for, but I downloaded Enthought a
> > few days ago and don't seem to find MinGW on my system. There are 2
> > relatively small (totalling about 13 kb IIRC) *python* files deeply
> > buried in the distribution with mingw in their filename but nothing
> > like a gcc compiler. I've mostly used visual studio or code warrior for
> > C compiling, so again - maybe I don't know what I am looking for.
>
> It is in c:\Python24\Enthought\mingw32\, IIRC (I don't have it in front of me).
> Add c:\Python24\Enthought\mingw32\bin\ to your PATH environment variable, and
> gcc.exe should be executable.
>
I have no such sub-directory. I'll try an uninstall-install. When I did
the original installation the installer hung at the end and I had to
manually close it. The Python interpreter was there and worked properly
and all of the goodies like numby and chaco were there so I wrote it
off as nothing more then a failure to close properly, but evidently I
missed an essential part of the installation.

-John Coleman


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



From R.Brodie at rl.ac.uk  Thu Nov 23 06:12:56 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Thu, 23 Nov 2006 11:12:56 -0000
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <ek3vnp$jjf$1@south.jnrs.ja.net>


"Tor Erik Soenvisen" <toreriks at hotmail.com> wrote in message 
news:Xns9884782092A96toreriknpolarno at 129.242.5.222...

> which executes fine. Hence, 0-9999 is okey... But this is a relatively
> small range, and sooner or later you probably get two numbers with the same
> id... Thoughts anyone?

I think you are confusing yourself unnecessarily. The obvious way to implement
unique ids is to return the address of the object. It's very unlikely that two
different objects share the same address. 




From aaghamarshana at gmail.com  Wed Nov 29 04:48:06 2006
From: aaghamarshana at gmail.com (B Shyam Sundar)
Date: Wed, 29 Nov 2006 01:48:06 -0800
Subject: Small prog question from a newbie: abt variables in a function
	definition
Message-ID: <d54274f20611290148w1e3e805fwf618049a6411bfc4@mail.gmail.com>

Hi all,
I am a newbie as far as python is concerned ... I am trying to write a code
for playing bridge in obj oriented manner ..

Well ... i have this small problem:

class hand:
    def __init__(self,set_of_cards=[]):
        self.set_of_cards=set_of_cards
    card_played_flag =0
    def play(played_card):
        for i in self.set_of_cards:
            if self.set_of_cards[i] == played_card:
                self.set_of_cards.remove(played_card)
     def sort_hand():
        for i in self.set_of_cards:
            for j in self.set_of_cards:
                if self.set_of_cards[j].face<self.set_of_cards[i].face
                self.set_of_cards[j],self.set_of_cards[i]=self.set_of_cards
[i],self.set_of_cards[j]
         for i in self.set_of_cards:
            for j in self.set_of_cards:
                if self.set_of_cards[j].suit<self.set_of_cards[i].suit
                self.set_of_cards[j],self.set_of_cards[i]=self.set_of_cards
[i],self.set_of_cards[j]

I have created card as a class with the attributes of suit face so ..
card(suit,face)

So my question is this ---

The compiler doesnt recognise that there is self.set_of_cards[j] can be a
card. It gives a syntax error.
Also I have not created any instance of the class (Can that be a problem)

So how do i fix this?
Also can I specify that the list set_of_cards has only card objects? IF yes
how?

Thanks a lot.

Shyam Sundar
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From fredrik at pythonware.com  Thu Nov  2 08:28:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 14:28:45 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162473318.495571.55550@h54g2000cwb.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>	<mailman.1647.1162462909.11739.python-list@python.org>
	<1162473318.495571.55550@h54g2000cwb.googlegroups.com>
Message-ID: <eicrqa$hlc$2@sea.gmane.org>

John Roth wrote:

> PEP 3100 specifies that the callable builtin is
> to be removed in Python 3.0, together with what
> I presume is the underlying C support for the
> function.

PEP 3100 is not even close to being finalized, and does not apply to 
Python 2.X.

</F>



From aisaac at american.edu  Sat Nov 11 08:10:54 2006
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 11 Nov 2006 13:10:54 GMT
Subject: handling many default values
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<mailman.2074.1163201795.11739.python-list@python.org>
Message-ID: <yZj5h.119$tb2.36@trnddc08>

> At Friday 10/11/2006 14:11, Alan G Isaac wrote:
> >class Params:
> >      def __init__(self,**kwargs):
> >          #set lots of default values
> >          ...
> >          #set the deviations from defaults
> >          self.__dict__.update(kwargs)
> >
> >Is this a reasonable approach overall?
> >(Including the last line.)


"Gabriel Genellina" wrote in message
news:mailman.2074.1163201795.11739.python-list at python.org...
> I'm not sure what you want to do exactly, but a class attribute acts
> as a default instance attribute.

Yes.  I am sorry my question was not clearer.
There are *many* parameters,
and the list can change,
so I want to avoid listing them all in the Param class's __init__ function,
using the strategy above.

Q1: Is this approach reasonable?
    (This is a newbie question about unforseen hazards.)
Q2: Is it horrible design to isolate the parameters in a separate class?
    (Comment: currently several classes may rely on (parts of) the same
parameter set.)

Thanks,
Alan Isaac




From NikitaTheSpider at gmail.com  Tue Nov 21 14:56:11 2006
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Tue, 21 Nov 2006 19:56:11 GMT
Subject: Spyce system requirements?
References: <1164127246.887153.98820@m7g2000cwm.googlegroups.com>
Message-ID: <NikitaTheSpider-0271EA.14561021112006@news-rdr-03-ge0-1.southeast.rr.com>

In article <1164127246.887153.98820 at m7g2000cwm.googlegroups.com>,
 "walterbyrd" <walterbyrd at iname.com> wrote:

> Does anybody know? What versionof Apache is required? If used with
> mod_python, what version of mod_python? Why version of Python is
> required?
> 
> Any help appreciated, thanx.

>From the Spyce documentation: "Python version 2.3 or greater. Spyce uses 
no version-specific Apache features."

http://spyce.sourceforge.net/docs/doc-conf_overview.html

There's also a Spyce mailing list your questions aren't answered in the 
documentation.

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


From mail at microcorp.co.za  Tue Nov 14 01:23:03 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Nov 2006 08:23:03 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com><mailman.1984.1163090531.11739.python-list@python.org><4rhku3FriokeU2@mid.individual.net><slrnel92ta.1r8.horpner@FIAD06.norwich.edu><4rjlkqFrlskqU1@mid.individual.net><pan.2006.11.10.17.36.56.825161@gmx.net><4rk5giFrerjfU1@mid.individual.net>
	<ej2nrk$qea$2@sea.gmane.org><022001c7055a$b24c7860$03000080@hendrik>
	<ej3vbg$r81$2@sea.gmane.org>
	<8c7f10c60611130605i382312c4l829d6167ae0a5828@mail.gmail.com>
Message-ID: <02d901c707c2$82410ea0$03000080@hendrik>

"Simon Brunning" <simon at brunningonline.net> Wrote:

> On 11/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> > Hendrik van Rooyen wrote:
> >
> > >> blue is red or green or yellow
> > >
> > > *grin* - this can be construed as a weakness in Python -
> >
> > it's boolean logic, and it's incompatible with human use of the same
> > terms in all contexts, not just Python.
>
> Indeed.
>
> The other day, I way showing my eight year old, Freja, what a program
> looks like:
>
> your_name = raw_input("What's your name? ")
> if your_name.lower() == "freja":
>     print "You're very stinky,", your_name
> else:
>     print "You smell lovely, ", your_name
>
> After running it a couple of times, she dove in and changed the 2nd line to:
>
> if your_name.lower() == "daddy or ella":
>
> (Ella is my other daughter's name.) That's pretty close to correct,
> I'd say - but you don't get anything for being close in a programming
> language.

This is true - and it is actually also an intractable problem - if you look at
what your daughter wrote, you get the feeling that you should be able to write
an interpreter that can implement what she meant, because it is quite clear to
you - until you try to write the specs...

Your daughter, btw, will go far if she already has the guts to do that...

- Hendrik



From __peter__ at web.de  Thu Nov  9 12:56:55 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Nov 2006 18:56:55 +0100
Subject: __div__ not recognized automatically
References: <eicmj4$sak$1@gwdu112.gwdg.de> <eid0n3$5ko$03$1@news.t-online.com>
	<eiq84s$11h$1@gwdu112.gwdg.de>
Message-ID: <eivq4n$un0$00$1@news.t-online.com>

Anton81 wrote:

>> If you have the
>> 
>> from __future__ import division
>> 
>> statement, you need to override __truediv__(), not __div__()
> 
> That worked after I also added
> from __future__ import division
> to all other modules I created.
> 
> Is it possible that there appears an inconsistency if the division is
> imported in only some of the modules?

Yes. If you use your class with and without the __future__ option you have
to implement both __div__ and __truediv__, I suppose.

Peter




From hollowspook at gmail.com  Sun Nov 26 03:25:13 2006
From: hollowspook at gmail.com (hollowspook)
Date: 26 Nov 2006 00:25:13 -0800
Subject: problem about list indexing
Message-ID: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>

Hi, there

a = range(100)

if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7],
a[11], a[56], a[90]]. 
Is there any other way?

Thanks in advance.



From fredrik at pythonware.com  Sat Nov 11 17:23:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 23:23:27 +0100
Subject: explicit self revisited
In-Reply-To: <ej5i3k$6l3$1@sea.gmane.org>
References: <ej5fuv$a4a$1@online.de> <ej5i3k$6l3$1@sea.gmane.org>
Message-ID: <ej5igs$6l3$3@sea.gmane.org>


> cannot all you clueless trolls who cannot think of a single useful thing 
> to contribute to Python start your own newsgroup?

and before anyone complains; please note that they're working through

     http://www.effbot.org/pyfaq/design-index.htm

one article at a time.  who's going to be the first one to argue that 
Python needs a goto statement ?

</F>



From rpdooling at gmail.com  Tue Nov  7 16:55:00 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 7 Nov 2006 13:55:00 -0800
Subject: Tired of spam, unrelated email?
In-Reply-To: <pan.2006.11.07.21.44.57.179169@REMOVE.THIS.cybersource.com.au>
References: <000601c7029a$7b0a7310$6400a8c0@genesis>
	<mailman.1850.1162931287.11739.python-list@python.org>
	<pan.2006.11.07.21.44.57.179169@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162936500.037583.267680@b28g2000cwb.googlegroups.com>

Steven D'Aprano wrote:

> Due to the vagaries of Usenet,
> I never received the original piece of spam
> at all

Same here. I do all of my persuing via Google Groups, and sometimes the
same thing happens in a legitimate thread. I see somebody responding as
the fist message in the thread, but I never see the OP. 

Odd.

rd



From bjobrien62 at gmail.com  Thu Nov  2 17:23:47 2006
From: bjobrien62 at gmail.com (SpreadTooThin)
Date: 2 Nov 2006 14:23:47 -0800
Subject: scared about refrences...
In-Reply-To: <454a5672$0$3721$426a74cc@news.free.fr>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
	<454a5672$0$3721$426a74cc@news.free.fr>
Message-ID: <1162506227.070059.230550@h54g2000cwb.googlegroups.com>


Bruno Desthuilliers wrote:
> SpreadTooThin a ?crit :
> > Bruno Desthuilliers wrote:
> >
> >>Nick Vatamaniuc a ?crit :
> >>(snip)
> >>
> >>>In  Python all the primitives are copied and all other entities are
> >>>references.
> >>
> >>Plain wrong. There's no "primitives" (ie : primitive data types) in
> >>Python, only objects. And they all get passed the same way.
> >
> >
> > so..
> > def fn(x):
> >    x = x + 1
> >    print x
> >
> > a = 2
> > fn(a)
> > fn(2)
> >
> > Wouldn't you say that this is being passed by value rather than by
> > refrence?
>
> It's not passed by value. when in fn(), the *local* name 'x' is bound to
> (IOW:references) the exact same object you passed to fn(). Then you
> rebind this (local) name to *another* object.
>
> def fn((x):
>    print id(x)
>    x = x + 1
>    print id(x)
>
> n = 1256
> print id(n)
> fn(n)
>
> def fn2(alist):
>     print id(alist)
>    alist.append(42)
>
> mylist = []
> print id(mylist)
> fn2(mylist)
> print mylist
> print id(mylist)
>
>
> There's nothing like "pass by value" or "pass by reference" in Python
> (and you'll notice I didn't claimed anything about this - just that the
> 'argument passing scheme' was the same for all objects).
>
> What we call "variables" in Python are name=>object bindings. When
> passing a "variable" to a function, the reference to the objet is bound
> to the name of the argument in the function's namespace. So the *name*
> is local to the function (hence rebinding the name to another objet
> doesn't impact the name=>object binding in the caller's namespace), but
> this name really refers to the same object (Python doesn't copy anything
> unless explicitely told to do so).
>
> HTH


I realize I may be beating a dead horse here... but...

a = 2
fn(a)
>>> 3
print a
>>> 2

So in some cases the it is safe to assume that your variables to
function will not
change in other cases it is not.. but they are all the same...



From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 12 17:33:06 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 13 Nov 2006 09:33:06 +1100
Subject: Random image text generation?
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
Message-ID: <pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>

On Sun, 12 Nov 2006 14:56:49 -0600, skip wrote:

> 
>     >> Is there a module out there that will generate an image with a random
>     >> text string such as the confirmation images you see on various
>     >> websites?
> 
>     Mitja> They're called captcha images or captchas for short.  Googling
>     Mitja> for "python captcha" returns several hits; see what you like...
> 
> Thanks.  I'd never heard that term before.  Assuming I can get PIL installed
> with freetype support on my Mac the ASPN recipe looks like it will do the
> trick.

Keep in mind two serious problems with captchas:

- they're impossible for the blind or people using text-only browsers to
see -- even mere colour blindness can make some captchas impossible to
solve;

- sometimes they're too difficult for even those with perfect vision to
decipher.


Two alternatives:

Instead of displaying an obfuscated image of a nonsense word, display six
randomly chosen photos, where five are of the same thing but not the same
image. E.g. you might show five different kittens and a horse. The user
has to click on the image that is not the same as the others.
State-of-the-art horse-recognition software is not yet in widespread use
by spammers *wink*

For a text only solution, consider putting up a natural language question
such as:

What is the third letter of 'national'?
What is four plus two?
How many eggs in a dozen?
Fill in the blank: Mary had a little ____ its fleece was white as snow.
Cat, Dog, Apple, Bird. One of those words is a fruit. Which one?

Beware of making the questions too difficult or too specific:

In the third season of Babylon Five, what did Mr Morden ask Lando? 

Also, keep in mind that all captchas are vulnerable to the old
distributed hybrid human-machine network trick: "We'll give you a free
account on our porn site if you spend fifteen minutes a day solving
captchas for our bot network." The only solution to that, I fear, is open
season on spammers and anyone who buys from a spammer.



-- 
Steven.



From cemerick at snowtide.com  Thu Nov 16 07:58:38 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Thu, 16 Nov 2006 07:58:38 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejhlar$bob$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
	<ejhlar$bob$1@sea.gmane.org>
Message-ID: <DC6E4BF7-C3F6-449C-9E2B-0668CE5749A9@snowtide.com>

On Nov 16, 2006, at 7:25 AM, Fredrik Lundh wrote:

>> If I'm wrong, just chalk it up to the fact that this is the first
>> time I've ever looked at the Infoset spec, and I'm simply confused.
>
> the Infoset spec *is* the essence of XML; if you don't realize that an
> XML document is just a serialization of a very simple data model,  
> you're
> bound to be fighting with XML all the time.

The principle and the practice diverge significantly in our neck of  
the woods.  The current project involves consuming and making sense  
of extraordinarily (and typically unnecessarily) complex XHTML.  Of  
course, as you say, those documents are still serializations of a  
simple data model, but the types of manipulations we do happen to  
butt up very uncomfortably with the way ET does things.

> but ET doesn't implement the Infoset spec as it is, of course: it  
> uses a
> *simplified* model, carefully optimized for the large percentage of  
> all
> XML formats that simply doesn't use mixed content.  if you're doing
> document-style processing, you sometimes need to add an extra  
> assignment
> or two, but unless you're doing *only* document-style processing, ET's
> API gives you a net win.  (and even if you're doing only document- 
> style
> processing, ET's speed and memory footprint gives you a net win over
> most competing technologies).

Yeah, documents are all we do -- XML just happens to be a pleasant  
intermediate format, and something we need to consume.  The notion of  
an nicely-formatted XML is entirely foreign to the work that we do --  
in fact, our current focus is (in part) dragging decidedly  
unstructured data out of those XHTML documents (among other source  
formats) and putting them into a reasonable, useful structure.

I took some time last night to bang out some functions that squeezed  
ET's model (via lxml) into doing what we need, and it ended up  
requiring a lot more B&D than I like.  At that point, I swung over to  
4suite, which dropped into place quite nicely.

*shrug* I guess we're just in the minority with regard to our API  
requirements -- we happen to live in the corner cases.  I'm certainly  
glad to have made the detour on a different path for a bit though.

- Chas


From lisa.engblom at gmail.com  Wed Nov 29 11:18:59 2006
From: lisa.engblom at gmail.com (lisa.engblom at gmail.com)
Date: 29 Nov 2006 08:18:59 -0800
Subject: trouble writing results to files
In-Reply-To: <ekk8kh$4lo$2@cernne03.cern.ch>
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
Message-ID: <1164817139.688429.120410@14g2000cws.googlegroups.com>


Roberto Bonvallet wrote:
> lisa.engblom at gmail.com wrote:
> > import csv
> > output = csv.writer(open('/Python25/working/output.csv', 'a'))
> > a = ["apple", "cranberry", "tart"]
> > for elem in range(len(a)):
> >    output.writerow(a[elem])
>
> output.writerow expects a sequence as an argument.  You are passing a
> string, which is a sequence of characters.  By the way, what output are you
> expecting to get?  Do you want a file with only one line (apple,
> cranberry, tart), or each fruit in a different line?

I want it to print everything on one line and then create a new line
where it will print some more stuff.  In my real program I am iterating
and it will eventually print the list a couple hundred times.  But it
would be useful to understand how to tell it to do either.

> BTW, iterating over range(len(a)) is an anti-pattern in Python.  You should
> do it like this:
>
>     for item in a:
> 	output.writerow([item])

I can try that.  Is using range(len(a)) a bad solution in the sense
that its likely to create an unexpected error? Or because there is a
more efficient way to accomplish the same thing?

thanks!
Lisa



From tim at tdw.net  Wed Nov  8 19:00:04 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 9 Nov 2006 00:00:04 +0000
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <B57127370.889.19118.1@mxextra>
References: <B57127370.889.19118.1@mxextra>
Message-ID: <9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>

On 8 Nov 2006 15:35:31 -0800, NicolasG <nicolasg at gmail.com> wrote:
> How can I use python to get the real IP address of my DSL router (when
> my PC is part of the local home LAN) ?

The router will the PC's default gateway IP address,  if you are on a
windows platform,  you can view it by typing IPCONFIG (enter) from a
command prompt.

A quick google, gave me this,  look at the comments at the end for an
example of finding the Default Gateway IP address using Python

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994

HTH :)


From fredrik at pythonware.com  Fri Nov 17 01:53:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 07:53:39 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
Message-ID: <ejjma3$oa1$2@sea.gmane.org>

gabor wrote:

> get an Unicode-exception, as everywhere else. you see, exceptions are 
> ok, i can deal with them.

> p.s: one additional note. if you code expects os.listdir to return 
> unicode, that usually means that all your code uses unicode strings. 
> which in turn means, that those filenames will somehow later interact 
> with unicode strings. which means that that byte-string-filename will 
> probably get auto-converted to unicode at a later point, and that 
> auto-conversion will VERY probably fail

it will raise an exception, most likely.  didn't you just say that 
exceptions were ok?

</F>



From onemoverx at gmail.com  Fri Nov 10 20:37:36 2006
From: onemoverx at gmail.com (=?ISO-8859-1?Q?Yusnel_Rojas_Garc=EDa?=)
Date: Fri, 10 Nov 2006 20:37:36 -0500
Subject: wsdl question
Message-ID: <9f45496e0611101737y3914be8aqfc91332f27dcc697@mail.gmail.com>

hi,

Can anyone tell me how to create a soap web service and generate it's
WSDL file??
I've tried so har to do so but no results.

cheers
          OnemoverX


From Daniel.Trstenjak at science-computing.de  Tue Nov 28 09:49:22 2006
From: Daniel.Trstenjak at science-computing.de (Daniel Trstenjak)
Date: Tue, 28 Nov 2006 14:49:22 +0000 (UTC)
Subject: 'locals' argument of PyEval_EvalCode
Message-ID: <20061128144918.GB13212@bug.science-computing.de>


Hi all,

I would like to know the definition of the 'locals' object given to
PyEval_EvalCode. Has 'locals' to be a python dictionary or a subtype
of a python dictionary, or is it enough if the object implements the
necessary protocols?

The python implementation behaves different for the two following code
lines:

from modul import symbol
from modul import *

In the case of the first one, it's enough if the object 'locals' implements
the necessary protocols. The second one only works if the object 'locals'
is a type or subtype of dictionary.


Best Regards,
     Daniel


From george.sakkis at gmail.com  Mon Nov 27 21:42:54 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 27 Nov 2006 18:42:54 -0800
Subject: Python script and C++
References: <456b83c7$1@clarion.carno.net.au>
Message-ID: <1164681774.129138.210780@j44g2000cwa.googlegroups.com>

Thuan Seah Tan wrote:
> Hi all,
>
>     I am new to python  and currently I am working on a traffic simulation
> which I plan to define the various agents using scripting. It's kind of like
> scripting for non-playable character in games. I am thinking of using python
> for this but I am concerned with running time. Is scripting a lot slower
> compared to direct implementation in C++? Does compiling the script help in
> any way? Also, can anyone recommend me a book that covers python in general
> as well as C++ binding? Thanks.

Even if pure python turns out to be slow for some critical parts of
your application, there are quite a few ways to deal with it: psyco,
pyrex, weave/blitz, ctypes, SWIG, Boost-python, SIP, CXX, SCXX,
hand-written C extensions and perhaps more. Visit
http://www.scipy.org/PerformancePython for an example of taking a
simple pure Python function and boosting it using several different
tools. Check out the final comparison table first; the pyrex version is
less than half a second slower than the C++.

George



From tdelaney at avaya.com  Tue Nov 14 23:40:16 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 15 Nov 2006 15:40:16 +1100
Subject: Python development time is faster.
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07443D@au3010avexu1.global.avaya.com>

?ric Daigneault wrote:

> This being said....  after a bit of experience in programming, design
> patterns and other marvels of the modern brains, doing bad code in
> python requires a conscious effort to do.  The bright side is that it
> gives all the justification to reviewers to smack the offenders on
> the head with a hardcover copy of the GoF.    

Thankfully that book retains some usefulness as a LART, because about 90% of what's not printed on the inside front and rear covers is made redundant by using Python <wink>.

Tim Delaney


From python.list at tim.thechases.com  Tue Nov  7 16:34:09 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 07 Nov 2006 15:34:09 -0600
Subject: sqlite query not working
In-Reply-To: <4550f7a5$0$14445$c3e8da3@news.astraweb.com>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>	<mailman.1854.1162933832.11739.python-list@python.org>
	<4550f7a5$0$14445$c3e8da3@news.astraweb.com>
Message-ID: <4550FBD1.6080703@tim.thechases.com>

>> Have you tried adding a self.connection.commit() to the
>> code? I don't know whether sqlite is transactional, but if
>> it is then the changes will disappear without a commit.
> 
> Wow, that worked! Now, I know I've done some DB work before
> (very similar to this) and never used commit(), so I'm
> confused but still grateful! :)


I tinkered with the mx.ODBC drivers a bit and had a similar
difficulty until I realized that it was configured to *not*
autocommit.  At least in the mx.ODBC drivers, you can pass a
param ("clear_auto_commit=1") to the Connect() call to restore
"normal" autocommiting behavior.  I can see both sides of the
fence...it's just a hassle to sniff out which DB drivers
autocommit and which don't.

-tkc






From horpner at yahoo.com  Fri Nov 10 09:23:43 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 15:23:43 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
Message-ID: <slrnel92ta.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-09, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
> What about
>
> if color == red or blue or green:
>     return 'primary'
>
>:)

The Inform 6* programming language supports the serial 'or' (and
'and') and looks just like that. The disadvantage is that the
usual binary logical operators must exist and are spelled
differently. (It uses C's '||' and '&&'.)

  if (color == red or blue or green && color.type == additive) {
      return 'primary';
  }

It also supports a switch statement syntax and semantics that
would fit nicely with Python.

  switch (action) {
    Eat:
      print "Gulp! Delicious, but poisonous.";
      deadflag = 1;
    Taste:
      print "You nibble at one of the corners. Yum!";
    Attack:
      print "What did that mushroom ever to to you?";
    default: 
      print "You can't do that to a mushroom.";
  }

There's no fall-through, and there's no syntax to enable it,
either.

In Python it would hypothetically be:

  switch action:
    Eat:
      print "Gulp! Delicious, but poisonous."
      deadflag = True
    Taste:
      print "You nibble at one of the corners. Yum!"
    Attack:
      print "What did the mushroom ever to to you?"
    default: 
      print "You can't do that to a mushroom."

I've often wanted a "Pythonic" Inform to Inform translator, so I
can leave out all the unecessary (), {} and ;.

 * Inform 6 is a language for implementing text adventures, not
   to be confused with the unrelated language Inform 7.

-- 
Neil Cerutti


From http  Fri Nov  3 19:16:52 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 16:16:52 -0800
Subject: Javascript is turning into Python?!
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>
	<1162596267.518634.164170@h54g2000cwb.googlegroups.com>
Message-ID: <7xr6wkt6a3.fsf@ruckus.brouhaha.com>

"Carl Banks" <pavlovevidence at gmail.com> writes:
> > http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7
> Maybe in exchange, Python can borrow the let statement.

Maybe the with statement could be extended to allow binding more than
one variable.  
    with x as f(), y as g():
       blah (x, y)


From fredrik at pythonware.com  Mon Nov 20 05:13:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 11:13:04 +0100
Subject: trying to create a dictionary in python,   using variables as
	a value
In-Reply-To: <1164016765.497299.193830@b28g2000cwb.googlegroups.com>
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
	<1164016765.497299.193830@b28g2000cwb.googlegroups.com>
Message-ID: <ejrv3h$lfr$2@sea.gmane.org>

John Machin wrote:

> On this one what? It would help very much if you showed the one
> statement that is getting the syntax error.

on which statement does he *not* get a syntax error?

</F>



From tim at tdw.net  Wed Nov  8 19:24:35 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 9 Nov 2006 00:24:35 +0000
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <G57129675.376.20348.3@mxextra>
References: <B57127370.889.19118.1@mxextra>
	<9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>
	<G57129675.376.20348.3@mxextra>
Message-ID: <9afea2ac0611081624s8df6b07k946a088b1067124f@mail.gmail.com>

On 09/11/06, Nicolas G <nicolasg at gmail.com> wrote:
>
>
> On 11/9/06, Tim Williams <tim at tdw.net> wrote:
> > On 8 Nov 2006 15:35:31 -0800, NicolasG <nicolasg at gmail.com> wrote:
> > > How can I use python to get the real IP address of my DSL router (when
> > > my PC is part of the local home LAN) ?
> >
> > The router will the PC's default gateway IP address,  if you are on a
> > windows platform,  you can view it by typing IPCONFIG (enter) from a
> > command prompt.
>
> This is the  router local IP, I need to get the router "outside" IP witch is
> the real one.

Oh sorry I missed that.

In that case,  get a free dynamic hostname from someone like noip.com.
Install their client on your PC.   The client will keep the hostname
updated with your "real" external IP address,  and you can use
socket.gethostbyname(hostname) to query it.

It will only take a few minutes to set up the NO-IP account and client

:)


From tim at tdw.net  Fri Nov 10 11:25:58 2006
From: tim at tdw.net (Tim Williams)
Date: Fri, 10 Nov 2006 16:25:58 +0000
Subject: Getting externally-facing IP address?
In-Reply-To: <9afea2ac0611100825o1115c188uc89ee1fbe0434717@mail.gmail.com>
References: <G57273422.245.22988.3@mxextra>
	<9afea2ac0611100825o1115c188uc89ee1fbe0434717@mail.gmail.com>
Message-ID: <9afea2ac0611100825x373fe801idc671e7f74e3ee2f@mail.gmail.com>

On 10/11/06, Tim Williams <tim at tdw.net> wrote:
>
>
> On 10/11/06, Michael B. Trausch <fd0man at gmail.com> wrote:
> >
> >
> >
> > Every programming example that I have seen thus far shows simple server
> code and how to bind to a socket--however, every example binds to the
> localhost address.  What I am wondering is this:  Is there a clean way to
> get the networked IP address of the machine the code is running on?  For
> example, my laptop's IP address is 192.168.0.101, and I want to bind a
> server to that address.  Is there a clean way of doing so that will work,
> for example, when I move the code to my server (which obviously doesn't have
> the same IP address)?
> >
> >
>
> Try  using 0.0.0.0  as the IP address,  or possibly giving IP address at
> all.
>
> HTH :)
>
>

Correction:

-> or possibly giving *no* IP address at


From greenbergj at NOSPAMwit.edu  Sun Nov 26 22:23:09 2006
From: greenbergj at NOSPAMwit.edu (Jordan Greenberg)
Date: Sun, 26 Nov 2006 22:23:09 -0500
Subject: test message
In-Reply-To: <9fckm2p839oh7c586t93c9fn3lfppu43g3@4ax.com>
References: <9fckm2p839oh7c586t93c9fn3lfppu43g3@4ax.com>
Message-ID: <456A5A1D.60309@NOSPAMwit.edu>

john.smith at nowhere.com wrote:
> This is a test message, please ignore.

I could do that, but reminding you that test messages go in *.test
groups is way more fun. And there are about a billion of them to choose
from. The great thing about test groups is that when you use them, you
don't clutter up my (and everyone else's) newsreader with your garbage.

Thanks,
Jordan

-- 
Posted via a free Usenet account from http://www.teranews.com



From theller at ctypes.org  Sun Nov 19 11:11:50 2006
From: theller at ctypes.org (Thomas Heller)
Date: Sun, 19 Nov 2006 17:11:50 +0100
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <7.0.1.0.0.20061117222832.040fd658@yahoo.com.ar>
References: <mailman.277.1163700699.32031.python-list@python.org>	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>	<455E1E59.4030501@probo.com>
	<7.0.1.0.0.20061117222832.040fd658@yahoo.com.ar>
Message-ID: <45608246.7050207@ctypes.org>

Gabriel Genellina schrieb:
> At Friday 17/11/2006 17:40, Tim Roberts wrote:
> 
>> > double wow!  as it is my customer wants me to print to the default
>> > printer.
>> > can you please help me with the command for rendering the pdf to the
>> > printer with acrobat using python?
>>
>>You'll have to use the registry to find "acrord32", but once you find
>>it, you just do:
>>     os.system( "\\Program Files\\Adobe\\Acrobat 7.0\\Reader\acrord32.exe
>>/p xxx.pdf" )
>>The /p switch requests printing.
> 
> Or just let Windows do the dirty work of locating Adobe Reader, 
> figuring out the parameters and such:
> 
> import win32api
> win32api.ShellExecute(0, "print", path/to/document.pdf, None, None, 0)
> 
Note that in Pyhton2.5, os.startfile was extended to accept an optional
second parameter; so
  os.startfile(path/to/document.pdf, "print")
should also work.

Thomas



From horpner at yahoo.com  Fri Nov 10 08:20:15 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 14:20:15 +0100
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <slrnel8v69.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-10, gavino <bootiack at yahoo.com> wrote:
> both are interpreted oo langauges......

"..."

-- 
Neil Cerutti


From alan.franzoni.xyz at gmail.com.invalid  Sun Nov 19 09:13:30 2006
From: alan.franzoni.xyz at gmail.com.invalid (Alan Franzoni)
Date: Sun, 19 Nov 2006 15:13:30 +0100
Subject: A python IDE for teaching that supports cyrillic i/o
References: <mailman.430.1163877551.32031.python-list@python.org>
	<i53421v27yla$.rrj9sefsk84d.dlg@40tude.net>
	<mailman.459.1163944705.32031.python-list@python.org>
Message-ID: <1knc9a9960uon.slnj7e17d24m$.dlg@40tude.net>

Kirill Simonov  si ? divertito a scrivere:

> On Sun, Nov 19, 2006 at 12:33:39PM +0100, Alan Franzoni wrote:
 
> No, I would prefer the editor to save the .py files with non-ASCII
> characters in UTF-8 encoding adding the BOM at the beginning of the
> file. This will allow the interpreted to detect the file encoding
> correctly and would save a teacher from explaining what an encoding is
> and why it is needed.

You'll run into encoding problems anyway in your programmer's life. I don't
think it's a workaround, try this article:

http://www.joelonsoftware.com/articles/Unicode.html

I think it's highly useful, you could tell that to your students.

BTW, not every editor supports the BOM. Have you tried with the explicit
encoding line:

# -*- coding: utf-8 -*-

Eclipse+Pydev seems to work with that. I'm not able to check with other
editors right now, but it seems you're experiencing a simple encoding
problem; your editor doesn't know which encoding you'd like to use, so it
defaults to ascii or iso-8859-1 leading to such problems.



-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From Jack.Andrews at boeing.com  Sun Nov 19 18:26:29 2006
From: Jack.Andrews at boeing.com (EXI-Andrews, Jack)
Date: Mon, 20 Nov 2006 09:26:29 +1000
Subject: re.match -- not greedy?
Message-ID: <750FA239330A7E4CA15D456F37DFF8AE02500B03@XCH-AU-01.au.nos.boeing.com>

the '*' and '+' don't seem to be greedy.. they will consume less in
order to match a string:

>>> import re;re.match('(a+)(ab)','aaab').groups()
('aa', 'ab')

this is the sort of behaviour i'd expect from 
   '(a+?)(ab)'

a+ should greedily consume a's at the expense of the string not matching

in real life, i am trying to match #defines:

>>> re.match( '#define ([A-Za-z0-9_]+)([^(])', '#define
abc(d)').groups()
('ab', 'c')

i want this example to fail because the first character after a string
of letters is a '('
i want to match only #defines without parameters.

so what's the definition of greedy?

(pls copy me on responses)

ta,


jack


From amitsoni.1984 at gmail.com  Tue Nov  7 14:49:26 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 7 Nov 2006 11:49:26 -0800
Subject: changing sequence to array
Message-ID: <1162928966.444452.75220@h54g2000cwb.googlegroups.com>

Hi,
I am using the code given below where A is a matrix and row is a
sequence. But it gives following error:

-------- error------
    A[a,:]=row
ValueError: setting an array element with a sequence.

--------------code----------------
#!/usr/bin/python
import numpy
file1 = open('matrix.txt', 'r')

count =  0
a=0
b=0
c=0
d=0
e=0
A = numpy.zeros([4,4])
B= numpy.zeros([4,4])
C = numpy.zeros([4,4])
D = numpy.zeros([4,4])
E = numpy.zeros([4,4])
while 1:
    lineStr = file1.readline()
    if not(lineStr):
        break

    count = count + 1
    row=lineStr.split()
    if count<=4:
        A[a,:]=row
        a=a+1
    elif count<=8:
        B[b,:]=row
        b=b+1
    elif count<=12:
        C[c,:]=row
        c=c+1
    elif count<=16:
        D[d,:]=row
        d=d+1
    elif count<=20:
        E[e,:]=row
        e=e+1

file1.close()
---------end of code-------------

is there any way to change a sequence to array so that the above
operation could be executed?
thank you
Amit



From duncan.booth at invalid.invalid  Thu Nov 30 05:42:03 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 Nov 2006 10:42:03 GMT
Subject: Slicing versus loops, was Re: for i in range() anti-pattern
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
	<ekmb29$hj3$02$1@news.t-online.com>
Message-ID: <Xns988B6CE4DCDF9duncanbooth@127.0.0.1>

Peter Otten <__peter__ at web.de> wrote:

> That example was chosen to prove your point. The real contender for the
> "swap items" problem are slices. 
> 
> def swap_slice(items):
>     left = items[::2]
>     items[::2] = items[1::2]
>     items[1::2] = left
>     return items
> 

It makes no difference to the time or memory use, but you can of course 
also write swap_slice using the aforementioned 'well known idiom':

items[::2], items[1::2] = items[1::2], items[::2]



From ptmcg at austin.rr._bogus_.com  Mon Nov 27 10:28:54 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 27 Nov 2006 15:28:54 GMT
Subject: Persistent Threads & Synchronisation
References: <ekbtqe$74s$2@news.freedom2surf.net>
Message-ID: <WuDah.4006$_H5.3673@tornado.texas.rr.com>

"Matthew Tylee Atkinson" <matthew at agrip.org.uk> wrote in message 
news:ekbtqe$74s$2 at news.freedom2surf.net...
>I appear to be having some problems with the isAlive() method of
> detecting if a thread is alive/active/running or not.  I'd be grateful
> for any advice.
>
Your comments about restartable threads got me thinking about generators. 
While this does not strictly do threading, this little example uses a list 
of generators, which save their state and pick up where they left off. 
(Also, look into simpy, which has a similar concept, but much more 
infrastructure support).

-- Paul


class Processor(object):
    def __init__(self, id_):
        self.id = id_
        self.finished = False

    def __str__(self):
        return "Processor: %s" % self.id

    def run(self):
        def runImpl_(self):
            runGen = self.runImpl()
            while not self.finished:
                try:
                    yield self.id,runGen.next()
                except StopIteration:
                    self.finished = True
        return runImpl_(self)

    def runImpl(self):
        times = 0
        while times < self.id:
            times += 1
            yield times


import random

class RandomProcessor(Processor):
    # just implement runImpl in subclass
    def runImpl(self):
        times = 0
        while times < self.id:
            times += 1
            yield random.random()

def main():
    # create list of processors
    procList =[ (random.choice([True,False]) and
                Processor(i) or RandomProcessor(i))
                for i in range(10)]
    procs = [ (p,p.run()) for p in procList ]

    # context switch loop
    while procs:

        # cycle through all processors
        for p in procs:
            try:
                ret = p[1].next()
                print ret
            except StopIteration:
                pass

        # remove any processors that have finished
        procs = [ p for p in procs if not p[0].finished ]

main()





From steven.bethard at gmail.com  Fri Nov  3 12:57:30 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Fri, 3 Nov 2006 17:57:30 +0000 (GMT)
Subject: python-dev Summary for 2006-09-16 through 2006-09-30
Message-ID: <20061103175732.7F93B1E4004@bag.python.org>

python-dev Summary for 2006-09-16 through 2006-09-30
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-09-16_2006-09-30]



=========
Summaries
=========

---------------
Import features
---------------

Fabio Zadrozny ran into the `previously reported relative import issues`_ where a ``from . import xxx`` always fails from a top-level module. This is because relative imports rely on the ``__name__`` of a module, so when it is just ``"__main__"``, they can't handle it properly.

On the subject of imports, Guido said that one of the missing import features was to be able to say "*this* package lives *here*". Paul Moore whipped up a Python API to an import hook that could do this, but indicated that a full mechanism would need to pay more attention to the environment (e.g. PYTHONPATH and .pth files).

There was also some discussion about trying to have a sort of per-module ``sys.path`` so that you could have multiple versions of the same module present, with different modules importing different versions. Phillip J. Eby suggested that this was probably not a very common need, and that implementing it would be quite difficult with things like C extensions only being able to be loaded once.

In general, people seemed interested in a pure-Python implementation of the import mechanism so that they could play with some of these approaches. It looked like Brett Cannon would probably be working on that.

.. _previously reported relative import issues: http://www.python.org/dev/summary/2006-06-16_2006-06-30/#relative-imports-and-pep-338-executing-modules-as-scripts

Contributing thread:

- `New relative import issue <http://mail.python.org/pipermail/python-dev/2006-September/068806.html>`__

----------------------------
Python library documentation
----------------------------

A less-trolly-than-usual post from Xah Lee started a discussion about the Python documentation.  Greg Ewing and others suggested following the documentation style of the Inside Macintosh series: first an "About this module" narrative explaining the concepts and how they fit together, followed by the extensive API reference. Most people agreed that simply extracting the documentation from the docstrings was a bad idea -- it lacks the high-level overview and gives equal importance to all functions, regardless of their use.

Contributing thread:

- `Python Doc problems <http://mail.python.org/pipermail/python-dev/2006-September/069023.html>`__

-----------------------
OS X universal binaries
-----------------------

Jack Howarth asked about creating universal binaries for OS X that would support 32-bit or 64-bit on both PPC and x86. Ronald Oussoren pointed out that the 32-bit part of this was already supported, but indicated that adding 64-bit support simultaneously might be more difficult. Ronald and Martin v. Lowis discussed strategies for modifying pyconfig.h, though it seemed these solutions might cause distutils to detect some architecture features incorrectly. Martin suggested that this was more a problem of distutils than pyconfig.h.

Contributing thread:

- `python, lipo and the future? <http://mail.python.org/pipermail/python-dev/2006-September/068800.html>`__

----------------------------------
Finer-grained locking than the GIL
----------------------------------

Martin Devera was looking into replacing the global interpreter lock (GIL) with finer-grained locking, tuned to minimize locking by assuming that most objects were used only by a single thread. For objects that were shared across multiple threads, this approach would allow non-blocking reads, but require all threads to "come home" before modifications could be made. Phillip J. Eby pointed out that most object accesses in Python are actually modifications too, due to reference counting, so it looked like Martin's proposal wouldn't work well with the current refcounting implementation of Python. After Martin v. Lowis found a bug in the locking algorithm, Martin Devera decided to take his idea back to the drawing board.

Contributing thread:

- `deja-vu .. python locking <http://mail.python.org/pipermail/python-dev/2006-September/068828.html>`__

---------------------------
OS X and ssize_t formatting
---------------------------

The buildbots spotted an OS X error in the itertools module. After Jack Diederich fixed a bug where ``size_t`` had been used instead of ``ssize_t``, Neal Norwitz noticed some problems with ``%zd`` on OS X. Despite documentation to the contrary in both the man page and the C99 Standard, using that specifier on OS X treats a negative number as an unsigned number. Ronald Oussoren and others reported the bug to Apple.

Contributing thread:

- `test_itertools fails for trunk on x86 OS X machine <http://mail.python.org/pipermail/python-dev/2006-September/068898.html>`__

-------------------
itertools.flatten()
-------------------

Michael Foord asked about including a flatten function that would take a sequence with sub-sequences nested to an arbitrary depth and create a simple non-nested sequence from that. People were strongly opposed to adding this as a builtin, but even as an itertools function, there was disagreement. How should strings, dicts and other arbitrary iterables be flattened? Since there wasn't one clear answer, it looked like the proposal didn't have much of a chance.

Contributing thread:

- `Suggestion for a new built-in - flatten <http://mail.python.org/pipermail/python-dev/2006-September/068941.html>`__

-------------------------------
Class definition syntax changes
-------------------------------

Fabio Zadrozny noted that in Python 2.5, classes can now be declared as::

    class C():
        ...

Some folks wanted the result to be a new-style class, but the presence or absence of ``()`` was deemed too subtle of a cue to make the new-style/old-style distinction. For the Python 2.X series, explicit subclassing of ``object`` will still be necessary.

Contributing thread:

- `Grammar change in classdef <http://mail.python.org/pipermail/python-dev/2006-September/068782.html>`__

----------------------
Python 2.5 and GCC 4.2
----------------------

Armin Rigo found some more signed integer overflows when using GCC 4.2 like the ones `reported earlier`_. Because Python 2.5 final was scheduled to be released in 24 hours, and it looked like there wouldn't be too many people affected these problems, they were deferred until 2.5.1. For the moment at least, the README indicates that GCC 4.1 and 4.2 shouldn't be used to compile Python.

.. _reported earlier: http://www.python.org/dev/summary/2006-08-16_2006-08-31/#gcc-4-2-and-integer-overflows

Contributing threads:

- `Before 2.5 - More signed integer overflows <http://mail.python.org/pipermail/python-dev/2006-September/068781.html>`__
- `GCC 4.x incompatibility <http://mail.python.org/pipermail/python-dev/2006-September/068879.html>`__

----------------------------------
Discard method for dicts and lists
----------------------------------

Gustavo Niemeyer and Greg Ewing suggested adding ``dict.discard()`` and ``list.discard()`` along the lines of ``set.discard()``. Fred L. Drake, Jr. explained that ``dict.discard(foo)`` is currently supported with ``dict.pop(foo, None)``. There was more debate about the ``list`` version, but most people seemed to think that wrapping ``list.remove()`` with the appropriate if-statement or try-except was fine.

Contributing threads:

- `dict.discard <http://mail.python.org/pipermail/python-dev/2006-September/068884.html>`__
- `list.discard? (Re: dict.discard) <http://mail.python.org/pipermail/python-dev/2006-September/068912.html>`__

--------------------
weakref enhancements
--------------------

tomer filiba offered some additions to the weakref module, weakattr_ and weakmethod_. Raymond Hettinger questioned how frequently these would be useful in the real world, but both tomer and Alex Martelli assured him that they had real-world use-cases for these. However, there didn't generally seem to be enough support for them to include them in the standard library.

.. _weakattr: http://sebulba.wikispaces.com/recipe+weakattr
.. _weakmethod: http://sebulba.wikispaces.com/recipe+weakmethod

Contributing thread:

- `weakref enhancements <http://mail.python.org/pipermail/python-dev/2006-September/069031.html>`__

------------------------
AST structure guarantees
------------------------

Anthony Baxter asked that the AST structure get the same guarantees as the byte-code format, that is, that it would change as little as possible so that people who wanted to hack it wouldn't have to change their code for each release. Pretty much everyone agreed that this was a good idea.

In a related thread, Sanghyeon Seo asked if the AST structure should become part of the Python specification so that other implementations like IronPython_ would use it as well.  While most people felt like it would be good if the various specifications had similar AST representations, it seemed like mandating it as part of the implementation would lock things down too much.

.. _IronPython: http://www.codeplex.com/Wiki/View.aspx?ProjectName=IronPython

Contributing threads:

- `IronPython and AST branch <http://mail.python.org/pipermail/python-dev/2006-September/068778.html>`__
- `IronPython and AST branch <http://mail.python.org/pipermail/python-dev/2006-September/068787.html>`__
- `AST structure and maintenance branches <http://mail.python.org/pipermail/python-dev/2006-September/068970.html>`__

-----------------------------
PEP 302: phase 2 import hooks
-----------------------------

For his dissertation work, Brett Cannon needed to implement phase 2 of the `PEP 302`_ import hooks. He asked for feedback on whether it would be easier to do this within the current C code, or whether it would be better to rewrite the import mechanisms in Python first. Phillip J. Eby gave some advice on how to restructure things, and suggested that the C code was somewhat delicate and having a Python implementation around would be a Good Thing. Armin Rigo strongly recommended rewriting things in Python.

.. _PEP 302: http://www.python.org/dev/peps/pep-0302/

Contributing thread:

- `difficulty of implementing phase 2 of PEP 302 in Python source <http://mail.python.org/pipermail/python-dev/2006-September/069017.html>`__

--------------------------------------
Testsuite, Windows and spaces in paths
--------------------------------------

Martin v. Lowis was trying to fix some bugs where spaces in Windows paths caused some of the testsuite to fail. For example, test_popen was getting an error because ``os.popen`` invoked::

    cmd.exe /c "c:\Program Files\python25\python.exe" -c "import sys;print sys.version"

which failed complaining that c:\Program is not a valid executable. Jean-Paul Calderon and Tim Peters explained that the ``cmd.exe`` part is necessary to force proper cmd.exe-style argument parsing and to allow environment variable substitution. After scrutinizing the MS quoting rules, it seemed like fixing this for Python 2.5 was too likely to introduce incompatibilities, so it was postponed to 2.6.

Contributing thread:

- `Testsuite fails on Windows if a space is in the path <http://mail.python.org/pipermail/python-dev/2006-September/068784.html>`__

-----------------------------------------
PEP 353: Backwards-compatibility #defines
-----------------------------------------

David Abrahams suggested a modification to the suggested backwards-compatibility #define incantation of `PEP 353`_ so that the PY_SSIZE_T_MAX and PY_SSIZE_T_MIN would only ever get defined once. There was some discussion about whether or not this was absolutely necessary, but everyone agreed that the change was probably sensible regardless.

.. _PEP 353: http://www.python.org/dev/peps/pep-0353/

Contributing thread:

- `Pep 353: Py_ssize_t advice <http://mail.python.org/pipermail/python-dev/2006-September/068944.html>`__

----------------
Shrinking Python 
----------------

Milan Krcmar asked about what he could drop from Python to make it small enough to fit on a platform with only 2 MiB of flash ROM and 16 MiB of RAM. Giovanni Bajo suggested dropping the CJK codecs (which account for about 800K), though he also noted that after that there weren't any really low-hanging fruit. Martin v. Lowis suggested that he might also get a gain out of dropping support for dynamic loading of extension modules, and linking all necessary modules statically. Gustavo Niemeyer pointed him to `Python for S60`_ and `Python for Maemo`_ which had to undergo similar stripping down.

.. _Python for S60: http://opensource.nokia.com/projects/pythonfors60/
.. _Python for Maemo: http://pymaemo.sf.net

Contributing thread:

- `Minipython <http://mail.python.org/pipermail/python-dev/2006-September/068987.html>`__


================
Deferred Threads
================
- `Removing __del__ <http://mail.python.org/pipermail/python-dev/2006-September/068875.html>`__
- `Caching float(0.0) <http://mail.python.org/pipermail/python-dev/2006-September/069049.html>`__
- `PEP 355 status <http://mail.python.org/pipermail/python-dev/2006-September/069059.html>`__
- `PEP 351 - do while <http://mail.python.org/pipermail/python-dev/2006-September/069088.html>`__


==================
Previous Summaries
==================
- `Signals, threads, blocking C functions <http://mail.python.org/pipermail/python-dev/2006-September/068996.html>`__


===============
Skipped Threads
===============
- `Thank you all <http://mail.python.org/pipermail/python-dev/2006-September/068780.html>`__
- `BRANCH FREEZE/IMMINENT RELEASE: Python 2.5 (final). 2006-09-19, 00:00UTC <http://mail.python.org/pipermail/python-dev/2006-September/068819.html>`__
- `RELEASED Python 2.5 (FINAL) <http://mail.python.org/pipermail/python-dev/2006-September/068851.html>`__
- `release25-maint branch - please keep frozen for a day or two more. <http://mail.python.org/pipermail/python-dev/2006-September/068852.html>`__
- `Download URL typo <http://mail.python.org/pipermail/python-dev/2006-September/068855.html>`__
- `Exceptions and slicing <http://mail.python.org/pipermail/python-dev/2006-September/068866.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-September/068872.html>`__
- `release25-maint is UNFROZEN <http://mail.python.org/pipermail/python-dev/2006-September/068878.html>`__
- `Small Py3k task: fix modulefinder.py <http://mail.python.org/pipermail/python-dev/2006-September/068883.html>`__
- `win32 - results from Lib/test - 2.5 release-maint <http://mail.python.org/pipermail/python-dev/2006-September/068888.html>`__
- `Weekly Python Patch/Bug Summary ** REVISED ** <http://mail.python.org/pipermail/python-dev/2006-September/068893.html>`__
- `[Python-checkins] release25-maint is UNFROZEN <http://mail.python.org/pipermail/python-dev/2006-September/068937.html>`__
- `Python network Programmign <http://mail.python.org/pipermail/python-dev/2006-September/068938.html>`__
- `Relative import bug? <http://mail.python.org/pipermail/python-dev/2006-September/068942.html>`__
- `GCC patch for catching errors in PyArg_ParseTuple <http://mail.python.org/pipermail/python-dev/2006-September/068958.html>`__
- `Typo.pl scan of Python 2.5 source code <http://mail.python.org/pipermail/python-dev/2006-September/068963.html>`__
- `Maybe we should have a C++ extension for testing... <http://mail.python.org/pipermail/python-dev/2006-September/068971.html>`__
- `Python 2.5 bug? Changes in behavior of traceback module <http://mail.python.org/pipermail/python-dev/2006-September/068975.html>`__
- `Need help with C - problem in sqlite3 module <http://mail.python.org/pipermail/python-dev/2006-September/068979.html>`__
- `PyErr_CheckSignals error return value <http://mail.python.org/pipermail/python-dev/2006-September/068994.html>`__
- `python-dev summary for 2006-08-01 to 2006-08-15 <http://mail.python.org/pipermail/python-dev/2006-September/069002.html>`__
- `2.4.4c1 October 11, 2.4.4 final October 18 <http://mail.python.org/pipermail/python-dev/2006-September/069003.html>`__
- `[SECUNIA] "buffer overrun in repr() for unicode strings" Potential Vulnerability (fwd) <http://mail.python.org/pipermail/python-dev/2006-September/069007.html>`__
- `List of candidate 2.4.4 bugs? <http://mail.python.org/pipermail/python-dev/2006-September/069008.html>`__
- `openssl - was: 2.4.4c1 October 11, 2.4.4 final October 18 <http://mail.python.org/pipermail/python-dev/2006-September/069013.html>`__
- `Collecting 2.4.4 fixes <http://mail.python.org/pipermail/python-dev/2006-September/069024.html>`__
- `os.unlink() closes file? <http://mail.python.org/pipermail/python-dev/2006-September/069052.html>`__
- `Tix not included in 2.5 for Windows <http://mail.python.org/pipermail/python-dev/2006-September/069070.html>`__
- `Possible semantic changes for PEP 352 in 2.6 <http://mail.python.org/pipermail/python-dev/2006-September/069091.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
September 16, 2006 through September 30, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This python-dev summary is the 13th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
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--------------------
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--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
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discussing.  All python-dev members are interested in seeing ideas
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-------------------------
How to Read the Summaries
-------------------------

This summary is written using reStructuredText_. Any unfamiliar
punctuation is probably markup for reST_ (otherwise it is probably
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.. _python-dev: http://www.python.org/dev/
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
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.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf




From jscrerar at compuserve.com  Fri Nov 24 13:26:26 2006
From: jscrerar at compuserve.com (Jim)
Date: 24 Nov 2006 10:26:26 -0800
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164390207.777502.24220@h54g2000cwb.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
	<1164390207.777502.24220@h54g2000cwb.googlegroups.com>
Message-ID: <1164392786.339330.161940@h54g2000cwb.googlegroups.com>

John Machin wrote:
> Jim wrote:
> > Hi,
> >
> > I have created an import module.  And would like to access a function
> > from the main script, e.g.,
> >
> > file abc.py:
> > ###################
> > def a():
> >     m()
> >     return None
> > ####################
> >
> > file main.py:
> > #####################
> > from abc import *
> > def m():
> >     print 'something'
> >     return None
> >
> > a()
> > ######################
> >
> > python25.exe main.py
> >
>
> Although there are literally correct answers to your question, the best
> answer is "Don't do that. You would be creating circular references
> between modules, and run the risk of emulating the mythical ooloo bird
> by disappearing up your own fundamental orifice". Some possible
> practical solutions:
>
> 1. Put the m function in a 3rd file/module. Then any other module which
> needs it can import/call.
>
> 2. If you think that's not a good idea, then put it in abc.py (it's not
> used in main.py in your example).
>
> 3. Maybe this will suit what you are really trying to do:
>
>  file abc.py:
>  ###################
>  def a(argfunc): # <<<<<=====
>      argfunc() # <<<<<=====
>  ####################
>
>  file main.py:
>  #####################
>  from abc import *
>  def m():
>      print 'something'
>
>  a(m) # <<<<<=====
>  ######################
>
> 4. If you think *that's* not a good idea, then you might like to
> explain at a higher level what you are *really* trying to achieve :-)
> E.g. "Function m is one of n functions in main.py of which abc.py
> may/must call 0, 1, or many because blah blah blah ..."
>
> BTW, "return None" at the very end of a function is redundant. The
> Python compiler generates "return None" automagically (implicitly!?)
> instead of letting you fall off the end of the world. Which book or
> tutorial are you using?
>
> BTW #2: "python25.exe main.py" ?? If you are on Windows, have Python
> 2.4 as your default setup, and are trialling 2.5: you may like to ask
> (in a new thread) about more convenient ways of doing it. Otherwise you
> might like to tell what you are up to (in a new thread) so that your
> problem can be diagnosed correctly and cured :-)
>
> HTH,
> John

BTW#1: I have most of the python books from O'Reilly.  I'm sure that
some of them say that its a good idea to use 'return None'.  However,
most their examples do not us it.  Anyway I find that its useful when
reading my own scripts.

BTW#2: I do not have Python 2.4 installed anymore.  Therefore, it is
not a trialling problem.

I thought that it would be NICE to keep the application and the user's
script separate from each other, being that python is so flexible.
However, there seems to be no end to the problems that occur by doing
this.  So I will abandon this exercise, since it appears not to be a
very good programming practise.

Thanks,
Jim



From superflit at gmail.com  Mon Nov 13 12:13:29 2006
From: superflit at gmail.com (flit)
Date: 13 Nov 2006 09:13:29 -0800
Subject: Python development time is faster.
In-Reply-To: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <1163438009.505835.326970@m73g2000cwd.googlegroups.com>

One thing I really like, is making "prototypes" on python.
Just to test some algorithm or procedure.
It is very fast and easy to debug.
So after, I make it in c++ (but not too much often, I leave it in
python today.)

Chris Brat wrote:
> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
>
> Does anyone have any comments on that statement from personal
> experience?
> How is this comparison measured?
> 
> 
> Thanks
> Chris



From tleeuwenburg at gmail.com  Mon Nov 20 22:44:30 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 20 Nov 2006 19:44:30 -0800
Subject: The Python Papers Edition One
Message-ID: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>

Greetings all,

Some of you may have noticed the launch of the Python Journal a while
back. Due to artistic differences, the journal has now been re-launched
as The Python Papers. It is available under a Creative Commons License,
something we felt was appropriate given its nature. Many here commented
that this was important to them, and it is important to us also.

For a fuller description of what we hope the journal to be, I re-create
my inaugural blog posting at the end of this email, or it can be found
online here: http://pythonpapers.cgpublisher.com/diary

Some of you had a number of specific points to raise, which I can now
answer properly since launching under our own banner.

1.) It takes too many clicks to download.
A) We know, but it's like that to save our server. We will be
publishing to a number of online archives, back-issues may be
back-linkable from those.

2.) Is it free?
A) Yes, as in beer and as in freedom. Creative Commons 2.5
Noncommercial, attribution, share-alike.

3.) Can I have an HTML version?
A) No, we like it pretty.

4.) Why not try (insert favourite thing here)
A) We will. Thanks for the fish.

" Volume 1, Edition 1 makes history

Welcome to The Python Papers. This journal, small though it is,
represents the careful efforts of a small group of Python enthusiasts
who are keen to form a better community in which developers may work.

As Editor-In-Chief, my role is manifold, but my goals are to improve
the level of connectedness of Python developers, and in so doing
improve my own developer experience.

The entire editorial board has put time into making this publication
something which will hopefully lead to a buildup of momentum, fuelled
by the enthusiastic involvement of others who find Python as exciting
as we do.

The current issue contains one academic, peer-reviewed article, one
industry article, and a list of events coming up in Melbourne,
Australia. We would like to expand this list significantly. We offer
our services in organising, collating and reviewing submitted content
such that Python developers around the world may participate in the
creation of something bigger than all of us, for the benefit of all of
us. It may be a small journal, a little thing really, but all are
welcome, and we look forward to getting to know our readers through the
written word.

Please download the first edition, and consider both what it is and
what it might be.

For those of you looking to publish an academic paper as a part of
coursework or for interest's sake alone, we can offer a formal review
process which will meet those guidelines while preserving the goals of
freedom of information and community spirit.

Those who are using Python in their work may like to consider using the
journal as a means of expressing successes or frustrations with either
the language itself or specific applications. We may be able to offer
code reviews and style guides, and would be happy to hear about and
help propagate news of what is happening so that everyone can take an
interest.

For those who would like a reliable source of information, The Python
Papers presents a unique and current view into the state of Python at
large.

To all of you, welcome!
Cheers,
-Tennessee (Editor-In-Chief)"



From fredrik at pythonware.com  Thu Nov  2 01:50:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 07:50:04 +0100
Subject: Python images processing -recap
In-Reply-To: <SYOdnf4nBKSu59TYnZ2dnUVZ_qSdnZ2d@comcast.com>
References: <SYOdnf4nBKSu59TYnZ2dnUVZ_qSdnZ2d@comcast.com>
Message-ID: <eic4eq$7uc$2@sea.gmane.org>

alf wrote:

> Are all supported, which is most mature, in which I could perform for 
> instance 'Ken Burns effect' 

that's a display effect, not an image effect.  you need a display (or 
animation) library for that.

</F>



From evenprimes at gmail.com  Mon Nov 20 12:15:53 2006
From: evenprimes at gmail.com (Chris Cioffi)
Date: Mon, 20 Nov 2006 12:15:53 -0500
Subject: OODB vs RDBMS
In-Reply-To: <4se3omFv6reaU1@mid.individual.net>
References: <4se3omFv6reaU1@mid.individual.net>
Message-ID: <f03f4fdf0611200915l117d5883m70a1893ad12494e9@mail.gmail.com>

You might want to look at either SQLObject or SQLAlchemy.  They seem
to handle the related join issues very nicely without resorting to
calling SQL directly in your code.

My only experience so far is using SQLObject with TurboGears and while
it doesn't solve the issue of lots of tables, it makes the access code
feel far more Pythonic than direct access.

I use pyODBC for accessing corporate DB2 tables, and while having SQL
in my code kinda sucks, it's fairly easy to write parametrized
queries.  If you create a DB access class you can encapsulate all your
DB specific code and SQL in 1 place and then have access to things by
method.  Handy, but far from perfect.

The Unicode issue is really related to your backend RDBMS, Python
seems to handle whatever you throw at it.  Still, be careful about how
you construct your SQL so you don't open yourself to a SQL-injection
like attack/bug.  (I had a problem before I started using parametrized
queries where the text I was INSERTing had a quote in it...:-/)

Personally I would tend to be wary of DB specific extensions like the
Postgres array.  While you're using a modern Postgres today, what
happens if you need to deploy on a slightly older version or on a
different DBMS that doesn't support arrays?  Creating foreign keys is
simple and well supported by most of the majors.  (I don't recall if
MySQL has true fk support in v5 or not...)

Chris

On 20 Nov 2006 16:34:30 GMT, Thomas Guettler
<guettli.usenet at thomas-guettler.de> wrote:
> Hi,
>
> most of the time I use ZODB/Durus to store my data.
>
> I like it, but I know that it has some weaknesses:
> - only accesible from python
> - I need to code your indexes for fast searching yourself.
>
> I think about using a RDBMS for the next project. What I don't like
> about RDBMS: If you need a list of values you need to create a new
> table. Example: If you want to store several email addresses of one
> customer, you need to create a new table.
>
> Since the namespace if tablenames is flat, you soon have so many
> tables, that it is hard to browse them.
>
> Postgres has extensions which allows you to store arrays in a column. Is
> this supported by the python binding? Are there other databases which
> support this?
>
> Are there OR-mappers (object relational mappers) which support lists in
> a column?
>
> How is the unicode support of the python bindings to RDBMSs? I don't
> want to convert the results of a query to unicode myself.
> Can you insert unicode strings into a SELECT statement?
>
> Which database supports fulltext searches with a customized word
> normalization? (All should be the same: str. str stra?e, strasse)
>
> Which OR-mapper do you suggest?
> Are there OR-mappers which support this: Subobjects are
> fetched automatically while you access the object tree?
> Example: One customer has N TroubleTicketItems:
> customerobj=get_customer(...)  # First SELECT
> for ticket in customerobj.tickets:  # (*)
>     ...
>
> (*) Second SELECT gets executed only if needed.
>
> I now this message is vague, but maybe we can discuss the
> pros/cons of "OODB vs RDBMS"
>
>  Thomas
>
>
> --
> Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
> E-Mail: guettli (*) thomas-guettler + de
> Spam Catcher: niemand.leermann at thomas-guettler.de
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
"A little government and a little luck are necessary in life, but only
a fool trusts either of them." -- P. J. O'Rourke

From mail at microcorp.co.za  Fri Nov 17 03:06:38 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 10:06:38 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <035601c70a1f$4f077060$03000080@hendrik>

"Stephan Kuhagen" <nospam at domain.tld> wrote:


> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. All those limits are managed by the interpreter for script code
> and hence can be limited for untrusted code by the interpreter. This also
> does not really make DoS impossible (what about C extensions? - maybe
> restricting "import"?). - As I said before in this thread, making a sandbox
> really secure is a hard job, and may need some serious changes in the
> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
> to have.

I seem to recall previous discussion on this group about a thing called the
bastion module,
and that it was deprecated.  Not sure if it has any relevance.

- Hendrik




From Leo.Kislov at gmail.com  Mon Nov  6 08:35:53 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 6 Nov 2006 05:35:53 -0800
Subject: Erronous "unsupported locale setting" ?
References: <ein814$ml1$1@news.albasani.net>
Message-ID: <1162820153.697175.18190@h54g2000cwb.googlegroups.com>

robert wrote:
> Why can the default locale not be set by its true name? but only by '' ? :

Probably it is just not implemented. But since locale names are system
specific (For example windows accepts 'ch' as Chinese in Taiwan, where
as IANA <http://www.iana.org/assignments/language-subtag-registry>
considers it Chamorro) setlocale should probably grow an additional
keyword parameter: setlocale(LC_ALL, iana='de-DE')

  -- Leo



From ronrsr at gmail.com  Sun Nov 19 21:55:20 2006
From: ronrsr at gmail.com (ronrsr)
Date: 19 Nov 2006 18:55:20 -0800
Subject: Not enough arguments for format string
Message-ID: <1163991320.262638.154950@j44g2000cwa.googlegroups.com>

is the error message I'm getting here, on the long formatted print
statement. .  I've tried adding arguments, in case I missed one, and it
still gets a syntax error.

here's the info:

#row is a dictionary with keys: zid, keywords, citation, quotation
def print_row(row):
    print row;
    print "row in
print_row","kw=",row["keywords"],"q=",row["quotation"],"c =
",row["citation"],"xyzzy row"


    print """<tr>
      <td class="pad">%s
      </td>
      <td class="pad">%s
      </td>
      <td class="pad">%s
      </td>
      <td class="pad" align="center"><form action="update.cgi"
name="updateform" enctype="application/x-www-form-urlencoded"
method="GET"><input type="hidden" name="zid" value="%d"><input
type="submit" value="Edit"></form>
      </td>
      </tr>
      """%row['keywords'],row['quotation'],row['citation'],row['zid']
    print "done printrow xyzzy"




here's the output, with my debugging info:

{'keywords': 'Agricultural Subsidies, Farmers', 'zid': 319L,
'citation': '\xe2\x80\x9cAgriculture in Crisis,\xe2\x80\x9d
<i>Rethinking US Agricultural Policy: Changing Course to Secure Farmer
Livelihoods Worldwide</i>, September 2003, 9', 'quotation': 'In 2001,
government payments to farmers amounted to an astounding 47 percent of
farmer income, up from about 20 percent in the 1990s. Despite this
enormous infusion of cash, farmer income declined steadily during the
same period, and many US farmers are under increasing financial
stress.'}
row in print_row kw= Agricultural Subsidies, Farmers q= In 2001,
government payments to farmers amounted to an astounding 47 percent of
farmer income, up from about 20 percent in the 1990s. Despite this
enormous infusion of cash, farmer income declined steadily during the
same period, and many US farmers are under increasing financial stress.
c =  "Agriculture in Crisis," <i>Rethinking US Agricultural Policy:
Changing Course to Secure Farmer Livelihoods Worldwide</i>, September
2003, 9 xyzzy row
Traceback (most recent call last):
  File "C:\Documents and Settings\Ronald\My
Documents\spi\zingers\public_html\display.py", line 116, in ?
    zhtml.print_row(adict)
  File "C:\Documents and Settings\Ronald\My
Documents\spi\zingers\public_html\zhtml.py", line 222, in print_row
    print """<tr>
TypeError: not enough arguments for format string


thanks once again, 

-rsr-



From rvernica at gmail.com  Fri Nov  3 21:38:33 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 03 Nov 2006 18:38:33 -0800
Subject: Physical constants
In-Reply-To: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>
References: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>
Message-ID: <eigudi$qdo$1@sea.gmane.org>

Hi,

I am not sure how the constants are implemented in math, but here is how 
I would do it. The main idea is to declare the constants as globals in 
some file.

Declare all the constants in a file:
const.py
---
pi = 3.14

Whenever you want to use pi from another file, just do:
somecode.py
---
from const import pi

a = 2 * pi

Regards,
Ray

Tommy Grav wrote:
> I have some code for doing orbital computations. The code is kind of
> extensive with many classes, each having several functions. In these
> functions I need to use constants (like the gravitational constant). 
> What is the best way of implementing a solution when constants are
> used in several different classes and functions? I do not want to 
> pass the constant down through the functions. I have thought of
> making a class of constants but I do not want to invoke an 
> instant in each function. How is the pi and e constants in math
> coded?
> 
> Tommy
> 
> tgrav at mac.com <mailto:tgrav at mac.com>
> 
> http://homepage.mac.com/tgrav/
> 
> 
> "Any intelligent fool can make things bigger, 
> more complex, and more violent. It takes a 
> touch of genious -- and a lot of courage -- 
> to move in the opposite direction"
>                          -- Albert Einstein
> 
> 



From Google at Bodoin.com  Mon Nov 13 13:05:12 2006
From: Google at Bodoin.com (Max)
Date: 13 Nov 2006 10:05:12 -0800
Subject: httplib.ResponseNotReady question
Message-ID: <1163441112.359818.208520@m7g2000cwm.googlegroups.com>

Hi, Group.

I'm not a Python programmer so this question may be really basic or
stupid. :)  I have some code that sends a simple request to an
end-point and reads the response.  That works just fine.  When I put
the code in a for loop though I get httplib.ResponseNotReady error
message.  It seems to me that I cannot call the requestor.getreply()
multiple times on the same requestor object.  Anyway, here's the part
of my code that is causing the problem (I hope the format is
preserved...).

def sendRequest( msg, loops ):
    requestor = httplib.HTTP(SERVER_ADDR, SERVER_PORT)
    requestor.putrequest("POST", "/path/to/endpoint")
    requestor.putheader("Host", SERVER_ADDR)
    requestor.putheader("Content-Type", "text/xml")
    requestor.putheader("Content-Length", str(len( msg ) ) )
    requestor.endheaders()
    for i in range(loops):
        requestor.send( msg )
        print "[" + str(i) + "] Message Sent      : " +
time.strftime('%H:%M:%S', time.localtime())
        (status_code, message, reply_headers) = requestor.getreply()
        print "[" + str(i) + "] Response Received : " +
str(status_code)
        print "[" + str(i) + "] Status            : " +
time.strftime('%H:%M:%S', time.localtime())
        print "-----[ break ]-----"

If I run this with loops=1 then everything works fine.  If I use a
number greater than 1 then I get the error.  Is there a method call
that I need to restore the requestor object to a condition where it's
eligible to receive another response?

Thanks, Max



From joel.hedlund at gmail.com  Sat Nov 11 10:46:17 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Sat, 11 Nov 2006 16:46:17 +0100
Subject: import parser does not import parser.py in same dir on win
In-Reply-To: <mailman.2098.1163258829.11739.python-list@python.org>
References: <ej4c0j$3qe$1@news.lysator.liu.se>
	<mailman.2098.1163258829.11739.python-list@python.org>
Message-ID: <ej4qrn$7dr$1@news.lysator.liu.se>

> the table of built-in modules are checked before searching the path.

I figured as much. But why is the behavior different on linux/win? Is 
this documented somewhere?

/Joel


From john106henry at hotmail.com  Mon Nov  6 19:42:55 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Nov 2006 16:42:55 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <1162708898.962171.161120@e3g2000cwe.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1162690929.501897.258360@b28g2000cwb.googlegroups.com>
	<1162708898.962171.161120@e3g2000cwe.googlegroups.com>
Message-ID: <1162860175.685031.90220@k70g2000cwa.googlegroups.com>

"cool" is in the eyes of the beholder.

While I agree that this can be useful in some situations, I find it
very annoying when all I want (and need) to do is a simple dumber
search and yet it tells me tons of useless searches that I don't care
for.

The inability to debug multi-threaded applications is pretty annoying
too.  It's unacceptable that a "professional" level debugger can't
handle multithreaded code.

But then again, I depend on Wing everyday.  I just have to build my
code with lots of "if debugging, don't thread else thread" type of
constructs...

vj wrote:
> Forgot to mention WING's file search and replace is pretty cool and
> powerful. It keeps checking changes in a different thread. If you want
> to change yyy in say 100 files you would:
>
> 1. specify yyy in the search window
> 2. A list of files get displayed with matching yyy
> 3. As you fix replace yyy in the files the list of files with matching
> yyy reduces automatically. This is very cool and very useful.
>
> Another thing I like about WING is that it warns you if you have tabs
> ans spaces mixed in a file.
> 
> The embedded python shell is also a useful feature.
> 
> VJ



From cvanarsdall at mvista.com  Wed Nov  8 14:13:02 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 08 Nov 2006 11:13:02 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163011320.632781.53370@m7g2000cwm.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>	<mailman.1861.1162937772.11739.python-list@python.org>	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
Message-ID: <45522C3E.3050705@mvista.com>

Paddy wrote:
> Aahz wrote:
>   
>> In article <1162997345.277966.31860 at h48g2000cwc.googlegroups.com>,
>> Beliavsky <beliavsky at aol.com> wrote:
>>     
>>> If this is supposed to justify using bad language in a public forum,
>>> it is poorly reasoned. Having heard "f***" does not mean they were not
>>> annoyed. 100% of people have seen trash on the street, but that does
>>> not justify littering. If a group of people don't mind profanity, there
>>> is no harm in their swearing to each other. But Usenet is read by a
>>> wide range of people, and needlessly offending some of them is wrong.
>>> The OP used "f******" just for emphasis. English is a rich language,
>>> and there are better ways of doing that.
>>>       
>> Oh, gimme a f****** break.  Do a simple Gooja search to find out how
>> often people already use "f***" around here.  I think you're the one who
>> needs to justify your position.
>> --
>> Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/
>>
>>     
> I too know your wrong Aahz. The written word is not the same as that
> spoken. People should make an effort to put across their meaning in a
> clear manner. If I were going to an interview I would be very careful
> about swearing and most likely not do it. People complain about the
> friendliness and tone of groups, and mention it when talking about
> programming languages.
>
> Not everyone swears like Eddy Murphy in Beverley Hills Cop, and a lot
> of those that do, would not do so when they want to impress, or
> communicate with a stranger.
>
> The tone of comp.lang.python *is* an asset, I think, to Python that
> swearing will diminish.
>   
You are comparing interviews to usenet.  I somehow see a disconnect.  I 
don't think many people are going to go to a potential employer and say 
"hey fuck face, how the fuck are ya?"  Yea, its not likely to happen, in 
most cases people might even dress up to an interview and use all of 
their professionalisms as to not appear as they would at home.  However 
communicating with people (cause that's what this is, its just people 
talking to one another about Python and the health of this forum) should 
be done as people see fit.  Although you mentioned impressing people 
etc,  is it really important to impress people here by watching your P's 
and Q's?  What impresses me here is someone's command of the language, I 
could really give a rats ass how they choose to disseminate their 
expertise. 

As its been mentioned before, its one thing for me or anyone else to get 
in someone's face and be like "listen you little fuck, use a while 
loop."  But that was clearly not the context.  Using an expletive as an 
adjective does not diminish the "friendless" of the group unless you are 
complete prude.  Granted, there are tons of them, I think that the real 
issue is that people need to learn to ignore things they don't like and 
not be so *damn* sensitive.  Meaning is clearly conveyed, people's 
sensitivity is their own issue and I think too many people have gotten 
way to used to the political correctness shoved down our throats by 
society.  Again, that's just my take on it, but those of you who would 
be offended by my statements and use of colorful language to describe my 
love of technology should probably just adjust your spam filters to scan 
for my name or emails that use words you can't handle.  Its kind of like 
not watching tv shows that bother as opposed to raising a stink and 
having them taken off the air. 

Hopefully now the count is more like 124.

/rant

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From thunderfoot at gmail.com  Mon Nov  6 16:44:38 2006
From: thunderfoot at gmail.com (thunderfoot at gmail.com)
Date: 6 Nov 2006 13:44:38 -0800
Subject: sqlite error?
References: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
Message-ID: <1162849478.092439.297160@i42g2000cwa.googlegroups.com>


John Salerno wrote:
> Am I using the ? placeholder wrong in this example?
>
>
> t = ('hi', 'bye')
>
> self.connection.execute("INSERT INTO Personal (firstName, lastName)
> VALUES ?", t)
>
>
>
> Traceback (most recent call last):
>    File "C:\Python25\myscripts\labdb\dbapp.py", line 93, in OnSaveRecord
>      self.save_to_database(textfield_values)
>    File "C:\Python25\myscripts\labdb\dbapp.py", line 97, in save_to_database
>      self.connection.execute("INSERT INTO Personal (firstName, lastName)
> VALUES ?", t)
> sqlite3.OperationalError: near "?": syntax error

I believe you're missing the parens around your VALUES to insert. Also,
you need 1 placeholder per argument inserted, not just one for the
entire argument list. Try:

self.connection.execute("INSERT INTO Personal (firstName, lastName)
VALUES (?, ?)", t)

HTH



From markasoper at hotmail.com  Wed Nov 22 15:16:55 2006
From: markasoper at hotmail.com (Mark S.)
Date: 22 Nov 2006 12:16:55 -0800
Subject: Accessing feed history in an RSS Reader
Message-ID: <1164226615.555781.169150@m73g2000cwd.googlegroups.com>

Anyone know how to access feed history (items not contained in the
current .xml file), so that an RSS Reader could display historical
postings?  Google Reader is able to do this.  I'm interested in
implementing kind of feature in Python.  I've done quite a bit of
searching to no avail.  Any ideas?



From apardon at forel.vub.ac.be  Tue Nov 14 06:50:33 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Nov 2006 11:50:33 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
	<mailman.102.1163454205.32031.python-list@python.org>
Message-ID: <slrneljbc8.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-13, Steve Holden <steve at holdenweb.com> wrote:
> John Salerno wrote:
>> Fredrik Lundh wrote:
>>> John Salerno wrote:
>>>
>>>>> Anyway, the FAQ answer seems to be a weak argument to me.
>>>> I agree. I was expecting something more technical to justify the 
>>>> colon, not just that it looks better.
>>> yeah, the whole idea of treating programming languages as an interface 
>>> between people and computers is really lame.  no wonder nobody's using 
>>> Python for anything.
>>>
>>> </F>
>>>
>> 
>> personally, i don't mind the colon and see no need to lose it, but if we 
>> are talking in the realm of aesthetics, it actually seems like it would 
>> be cleaner if it weren't there...sure, at first everyone who is used to 
>> it might feel like something is missing, or the line is "hanging" open, 
>> but overall the less characters, the better, right? isn't that why the 
>> braces are gone?
>
> No. The braces are gone because they don't assist a reader's 
> determination of block structure like indentation does.

IMO this works both ways.

> Otherwise why 
> would people write indenting pretty printers for C and the like?

Try to follow an indentation marked structure when the structure
crosses a page boundary and you can't view the whole structure
at once. Sensible placed markers can greatly assist in getting
a feel for a structure even if the structure is already properly
indented.

-- 
Antoon Pardon


From trentm at activestate.com  Wed Nov 29 11:51:13 2006
From: trentm at activestate.com (Trent Mick)
Date: Wed, 29 Nov 2006 08:51:13 -0800
Subject: pyxpcom
In-Reply-To: <sbgbh.3034$YX1.1371@newsfe23.lga>
References: <QhHah.226$YX1.85@newsfe23.lga>	<mailman.809.1164736366.32031.python-list@python.org>	<cg%ah.268$Gf6.11@newsfe21.lga>	<mailman.816.1164752199.32031.python-list@python.org>
	<sbgbh.3034$YX1.1371@newsfe23.lga>
Message-ID: <456DBA81.3070108@activestate.com>

hg wrote:
> Trent Mick wrote:
>>> My need is as follows: I have developed an activex component to access a
>>> smart card on the client side / do some web site logon.
>>>
>>> Are xpcom / pyxpcom advanced/stable enough for such an implementation
>>> under Linux / Windows ?
>> You mean to provide the equivalent functionality for Firefox that your
>> activex component does for IE? Yes, xpcom and pyxpcom are quite stable,
>> however putting together a Firefox extension that gets PyXPCOM itself up
>> and running in a client's Firefox install will be quite challenging.
>>
>> Trent
>>
> Exactly ... are you saying I need to distribute Firefox compiled
> differently in order to achieve that ?

No. But you'll have to get comfortable building your own Firefox and then 
building the PyXPCOM extension and then packaging the built PyXPCOM bits that 
a normal Firefox install does not have already into a Firefox extension. This 
would also mean packaging up parts of a Python build and possible needing to 
have a custom Python build to (1) get shared library loading to work correct 
and (2) ensure there isn't crosstalk between the python that PyXPCOM uses and 
possibly other Python installations on the target machine.

> This is less a python issue clearly if that is the case: would I have
> the same issues to resolve if I were to write the module in C++ ?

A little, yes: I believe you'd need a Firefox build in a development tree to 
build a vanilla C++ XPCOM component. However, I am not sure of that.

Mostly, no: You wouldn't need to worry about all the PyXPCOM/Python 
build/install issues.


Trent

-- 
Trent Mick
trentm at activestate.com


From pipehappy at gmail.com  Sun Nov  5 13:11:02 2006
From: pipehappy at gmail.com (pipehappy)
Date: 5 Nov 2006 10:11:02 -0800
Subject: maybe this is a print odds
Message-ID: <1162750262.316632.298600@e3g2000cwe.googlegroups.com>

I come this code:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> class He(object):
...     def __str__(self):
...         return "He"
...
>>> hes = [He(),He(),He()]
>>> print hes
[<__main__.He object at 0x00BE92D0>, <__main__.He object at
0x00BE9370>, <__main
__.He object at 0x00BE93B0>]       # I expect output: [He,He,He]
>>> print hes[0]
He
>>>

Do anyone know trick to overcome this or python has some proposal to
extend print that can do iterately print? I just want to get the way of
print which I my guess. Thanks a lot!



From claird at lairds.us  Mon Nov  6 19:52:51 2006
From: claird at lairds.us (Cameron Laird)
Date: Tue, 7 Nov 2006 00:52:51 +0000
Subject: Unicode/ascii encoding nightmare
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
	<1162853677.881233.76940@m7g2000cwm.googlegroups.com>
	<1162854065.932910.99240@k70g2000cwa.googlegroups.com>
Message-ID: <302524-2rs.ln1@lairds.us>

In article <1162854065.932910.99240 at k70g2000cwa.googlegroups.com>,
John Machin <sjmachin at lexicon.net> wrote:
>
>Thomas W wrote:
>> Ok, I've cleaned up my code abit and it seems as if I've
>> encoded/decoded myself into a corner ;-). My understanding of unicode
>> has room for improvement, that's for sure. I got some pointers and
>> initial code-cleanup seem to have removed some of the strange results I
>> got, which several of you also pointed out.
>>
>> Anyway, thanks for all your replies. I think I can get this thing up
>> and running with a bit more code tinkering. And I'll read up on some
>> unicode-docs as well. :-) Thanks again.
>
>I strongly suggest that you read the docs *FIRST*, and don't "tinker"
>at all.
			.
			.
			.
Does
<URL: http://www.unixreview.com/documents/s=10102/ur0611d/ur0610d.htm >
help?


From fredrik at pythonware.com  Wed Nov 15 12:25:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 18:25:54 +0100
Subject: Yield
In-Reply-To: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
Message-ID: <ejfij1$bd$1@sea.gmane.org>

Mateuszk87 wrote:

> may someone explain "yield" function, please. how does it actually work
> and when do you use it?

it returns a value from a function without actually terminating the 
function; when the function is resumed, it'll continue to execute after 
the yield.

a function that contains a yield statement is called a "generator", and 
is most often used in a for-in loop, or in other contexts that expect a 
sequence.  the loop is automatically terminated when the function 
returns in a usual way:

 >>> def gen():
...     yield 1
...     yield 2
...     yield 3
...
 >>> for item in gen():
...     print item
...
1
2
3
 >>> sum(gen())
6
 >>> [str(i) for i in gen()]
['1', '2', '3']

you can also use the generator "by hand"; when you call a generator 
function, it returns a special "generator object", and then immediately 
suspends itself.  to run the generator, call its "next" method:

 >>> g = gen()
 >>> g
<generator object at 0x00AE64E0>
 >>> g.next()
1
 >>> g.next()
2
 >>> g.next()
3

when the generator is exhausted, it raises a StopIterator exception:

 >>> g.next()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
StopIteration

reference information:

     http://effbot.org/pyref/yield.htm

hope this helps!

</F>



From john106henry at hotmail.com  Mon Nov  6 12:07:05 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Nov 2006 09:07:05 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <1162827467.001209.29600@f16g2000cwb.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<1161783204.875966.164720@b28g2000cwb.googlegroups.com>
	<1162827467.001209.29600@f16g2000cwb.googlegroups.com>
Message-ID: <1162832825.037508.179770@m73g2000cwd.googlegroups.com>

Yes, from a easy of use standpoint, I agree that PythonCard is very
high on the list.

Unfortunately there isn't more "activities" as one would like to see.

On the other hand, that's typical of open-source projects.  We can
always roll up our sleeves and do it ourselves.

At least the multicolumn control isn't particularly complex, should be
able to figure out from the source code how to sort.  I believe I did
that some time ago.   I believe I ended up reshuffling the list...

metaperl wrote:
> rdsteph at mac.com wrote:
> > Paul Boddie wrote:
> >
> > """The figures behind the scenes are quite enlightening for that
> > particular page. If you (or community experiences) don't agree with the
> >
> > rankings (wxPython apparently even easier to learn than PythonCard and
> > Tinder, a bunch of Gtk-based toolkits having more or less "full" Linux
> > scores) then you'll have some surprises, I'm sure. Nevertheless, it's
> > an interesting concept. """
> >
> > Well, I don't know what I was thinking, exactly, when I rated
> > PythonCard's ease of use...so I went back and changed it to rate it a
> > lot higher. The ratings in this script were done a long time ago now
>
> I dropped Pythoncard when I could not sort multi column lists and when
> I posted to the email list and no one answered me.
> 
> But prior to that it was great.



From anthony at python.org  Wed Nov  1 05:50:32 2006
From: anthony at python.org (Anthony Baxter)
Date: Wed, 1 Nov 2006 21:50:32 +1100
Subject: RELEASED Python 2.3.6, FINAL
Message-ID: <200611012150.44644.anthony@python.org>

On behalf of the Python development team and the Python
community, I'm happy to announce the release of Python 2.3.6
(FINAL).

Python 2.3.6 is a security bug-fix release. While Python 2.5
is the latest version of Python, we're making this release for
people who are still running Python 2.3. Unlike the recently
released 2.4.4, this release only contains a small handful of
security-related bugfixes. See the website for more.

*  Python 2.3.6 contains a fix for PSF-2006-001, a buffer overrun
*  in repr() of unicode strings in wide unicode (UCS-4) builds.
*  See http://www.python.org/news/security/PSF-2006-001/ for more.

This is a **source only** release. The Windows and Mac binaries
of 2.3.5 were built with UCS-2 unicode, and are therefore not
vulnerable to the problem outlined in PSF-2006-001. The PCRE fix
is for a long-deprecated module (you should use the 're' module
instead) and the email fix can be obtained by downloading the
standalone version of the email package.

Most vendors who ship Python should have already released a
patched version of 2.3.5 with the above fixes, this release is
for people who need or want to build their own release, but don't
want to mess around with patch or svn.

There have been no changes (apart from the version number) since the
release candidate of 2.3.6.

Python 2.3.6 will complete python.org's response to PSF-2006-001.
If you're still on Python 2.2 for some reason and need to work
with UCS-4 unicode strings, please obtain the patch from the
PSF-2006-001 security advisory page. Python 2.4.4 and Python 2.5
have both already been released and contain the fix for this
security problem.

For more information on Python 2.3.6, including download links
for source archives, release notes, and known issues, please see:

    http://www.python.org/2.3.6

Highlights of this new release include:

  - A fix for PSF-2006-001, a bug in repr() for unicode strings 
    on UCS-4 (wide unicode) builds.
  - Two other, less critical, security fixes.

Enjoy this release,
Anthony

Anthony Baxter
anthony at python.org
Python Release Manager
(on behalf of the entire python-dev team)
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From do-not-reply at by-mail.com  Fri Nov 17 05:18:41 2006
From: do-not-reply at by-mail.com (Johan von Boisman)
Date: Fri, 17 Nov 2006 11:18:41 +0100
Subject: A question on Encoding and Decoding.
In-Reply-To: <1163584122.966665.149360@k70g2000cwa.googlegroups.com>
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>
	<mailman.147.1163514990.32031.python-list@python.org>
	<1163584122.966665.149360@k70g2000cwa.googlegroups.com>
Message-ID: <ejk2a1$1mf$2@wake.carmen.se>

rbsharp at gmx.de wrote:
> Hello,
> I think this remark is more to the point. In my experience, the general
> problem is that python operates with the default encoding "ascii" as in
> sys.getdefaultencoding(). It is possible to set the defaultencoding in
> sitecustomize.py, with sys.setdefaultencoding('latin1'). I have placed
> sitecustomize.py in Lib/site-packages. It is not possible to set the
> encoding once python has started. Setting the encoding only works if
> you can bind yourself to this one encoding and is therefore no general
> fix.
> The only reasonable way to work is to get your strings into unicode
> (and sometimes back out again).
> If for instance you type:
> s = "???????" and then try
> us = unicode(s) you will get a traceback identical to yours.

I missed the beginning of this thread, but why not write

s = u"???????"

Is there ever a reason _not_ to exclusively use the unicode stringtype 
throughout your Python program? (of course you may need to encode/decode 
when interfacing with the world outside your program)

/johan


From skip at pobox.com  Wed Nov  8 16:35:36 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 15:35:36 -0600
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <45524A1A.5090407@mvista.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
	<45522C3E.3050705@mvista.com>
	<17746.17512.702626.550949@montanaro.dyndns.org>
	<45524A1A.5090407@mvista.com>
Message-ID: <17746.19880.389526.821294@montanaro.dyndns.org>


    Carl> As for your statement about how "command of the language" (in
    Carl> reference to python) extends to written/spoken word, I don't quite
    Carl> understand what you are saying.  

Just that posts to newsgroups like c.l.py are examples of your written
prose, profane or not.

    Carl> Can you explain how the use of profanity affects one's ability to
    Carl> code in python or explain their code?  

I've been programming for 20 some-odd years.  I've found that spoken and
written communication skills have always been as important to success as
pure programming skills.

Skip


From johnjsal at NOSPAMgmail.com  Thu Nov  9 10:27:18 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 09 Nov 2006 10:27:18 -0500
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163078175.600579.22930@h54g2000cwb.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
Message-ID: <45534800$0$12978$c3e8da3@news.astraweb.com>

Ant wrote:

> I do use vim more than Python these days

What does that mean? Are you referring to all the setup involved with vim?


From dimitri.pater at gmail.com  Wed Nov  8 06:02:31 2006
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 8 Nov 2006 12:02:31 +0100
Subject: Python deployment options.
In-Reply-To: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
Message-ID: <e75321bd0611080302p38ef3f7fnc60b818121a6ce85@mail.gmail.com>

Hi,
try:
http://www.py2exe.org/

regards,
Dimitri

On 8 Nov 2006 02:37:42 -0800, king kikapu <aboudouvas at panafonet.gr> wrote:
>
>
> Hi to all folks here,
>
> i just bought a book and started reading about this language.
> I want to ask what options do we have to deploy a python program to
> users that do not have the labguage installed ??
>
> I mean, can i make an executable file, or something that contains the
> runtime and the modules that the program only use or am i forced to
> download the language to the user machine so the .py  files can be run
> ??
>
> Thanks in advance,
>
> king kikapu
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
---
You can't have everything. Where would you put it? -- Steven Wright
---
please visit www.serpia.org
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From olsongt at verizon.net  Wed Nov  8 13:23:23 2006
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 8 Nov 2006 10:23:23 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163000984.575289.87230@i42g2000cwa.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>
	<1163000984.575289.87230@i42g2000cwa.googlegroups.com>
Message-ID: <1163010203.489775.308950@b28g2000cwb.googlegroups.com>


BartlebyScrivener wrote:
> Chaz Ginger wrote:
>
> >> it is supposed to be about PYTHON. Get it?
>
> I agree. And Python is an extremely serious matter calling for decorum
> and propriety.
>
> Don't say fuck, ni, peng, or ni-wom.
>
> http://en.wikipedia.org/wiki/Knights_who_say_Ni
>
> rd

Does using foobar in examples count as profanity?

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



From pavlovevidence at gmail.com  Fri Nov 24 11:12:53 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 24 Nov 2006 08:12:53 -0800
Subject: Newbie Developing a Python Extension
In-Reply-To: <ek68nq$2bj$1@nobel.pacific.net.sg>
References: <ek68nq$2bj$1@nobel.pacific.net.sg>
Message-ID: <1164384773.152649.296600@f16g2000cwb.googlegroups.com>


Jeremy wrote:
> Hi,
>
> I have been working on Linux 2.6.9 to adapt a C++ module to work as a Python
> extension with the following setup.py file:
>
> from distutils.core import setup, Extension
>
> sm=Extension(
>  'tdma',
>  define_macros=[('__USE_POSIX199309','1')],
>  include_dirs=['/usr/include','/usr/include/python2.3'],
>  library_dirs=['/usr/lib'],
>  sources=['Bitstrea.cpp','bytequeu.cpp','debug.cpp','dlist.cpp',
>   'GrPort.cpp','IoPort.cpp','LMEmu.cpp','LMEmuPdu.cpp',
>   'MacPyIf.cpp','per_os_clk.cpp','timer.cpp'])
>
> setup(name='MySm',
>  version='0.1.0',
>  description='TDMA MAC',
>  ext_modules=[sm])
>
> The extension uses the POSIX call clock_gettime() and things seem fine when
> generating the tdma.so file. However, when running the Python program, at a
> line 'from tdma import init,txdn,txup,...', I get an error message saying
> 'ImportError: /home/.../tdma.so: undefined symbol: clock_gettime'.

You're missing a library.  From the clock_gettime man page:

NOTE
       Most  systems  require  the program be linked with the librt
library to
       use these functions.

So you need to build the extention with librt.  Try adding a 'libraries
= ['rt']' option to the extension definition.  (Unfortunately, on
Linux, builduing a shared object without specifying libraries needed
passes silently.  It'd be nice if there was an option to require all
undefined non-Python symbols to be accounted for by some library, but
that would be a lot of work to implement.)


Carl Banks



From skip at pobox.com  Fri Nov 10 12:54:39 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 10 Nov 2006 11:54:39 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej27mh$u05$1@sea.gmane.org>
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
	<17748.35935.368749.950252@montanaro.dyndns.org>
	<ej27mh$u05$1@sea.gmane.org>
Message-ID: <17748.48351.853342.505257@montanaro.dyndns.org>

    Robert> skip at pobox.com wrote:
    >> P.S.  I felt I just had to tie this into the thread on profanity somehow.
    >> But notice that I didn't mention nazis or Hitler. ;-)

    Robert> You did it just now!

Hence the smiley. ;-)

S


From bnblazer at gmail.com  Wed Nov  8 13:01:44 2006
From: bnblazer at gmail.com (Brian)
Date: 8 Nov 2006 10:01:44 -0800
Subject: Strange re problem on OSX but Not Linux
Message-ID: <1163008904.817018.186000@h54g2000cwb.googlegroups.com>

I have a very small script:

import re

text = open('eq.txt','r').read()
regex = '[^A-Z][A-Z]{3}([a-z])[A-Z]{3}[^A-Z]'
pattern = re.compile(regex)
match = pattern.findall(text)

print ''.join(match)

However, when I try to run it, I get this error:

Traceback (most recent call last):
  File
"/Applications/Komodo.app/Contents/SharedSupport/dbgp/bin/pydbgp", line
66, in <module>
    import dbgp.client
  File
"/Applications/Komodo.app/Contents/SharedSupport/dbgp/pythonlib/dbgp/client.py",
line 44, in <module>
    import traceback, re
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/re.py",
line 5, in <module>
    #
AttributeError: 'module' object has no attribute 'compile'

-------------------------------------------------------------------------------
Here is the error outside of Komodo:

Traceback (most recent call last):
  File "reg1.py", line 1, in <module>
    import re
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/re.py",
line 5, in <module>
    #
AttributeError: 'module' object has no attribute 'compile'
------------------------------------------------------------------------------

This is running 2.5 on my OSX box.  If I run it (again with 2.5) on my
SUSE machine, I get no errors.

I am sure that I have overlooked something trivial here - so please be
gentle if it is on the stupid side of things.

Thanks,
Brian



From carsten at uniqsys.com  Thu Nov  2 15:46:20 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 02 Nov 2006 15:46:20 -0500
Subject: what's the difference between these two methods? (aka, why
	doesn't one of them work?)
In-Reply-To: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
Message-ID: <1162500380.9422.9.camel@dot.uniqsys.com>

On Thu, 2006-11-02 at 12:28 -0800, JohnJSal wrote:
> Can someone explain to me why the first version of this method works,
> but the second one doesn't? All I've changed (I think) is how the
> information is nested. The error I'm getting is that the call to
> xrc.XRCCTRL is not working in the second example. Instead of getting
> the appropriate widget, it's returning None. Is this a result of the
> nesting, or the for loops perhaps?
> [...]
> Traceback (most recent call last):
>   File "C:\Python25\myscripts\labdb\dbapp.py", line 91, in OnSaveRecord
>     table_values.append(xrc.XRCCTRL(tab, textfield_id).GetValue())
> AttributeError: 'NoneType' object has no attribute 'GetValue'
> 

You might find it helpful to inspect (e.g. print) textfield_id before
the line that causes the exception.

-Carsten




From frank at chagford.com  Tue Nov  7 00:20:15 2006
From: frank at chagford.com (Frank Millman)
Date: 6 Nov 2006 21:20:15 -0800
Subject: sqlite error?
In-Reply-To: <454faf0a$0$12993$c3e8da3@news.astraweb.com>
References: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
	<1162849478.092439.297160@i42g2000cwa.googlegroups.com>
	<454faf0a$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <1162876815.281902.70620@e3g2000cwe.googlegroups.com>


John Salerno wrote:
> >> Am I using the ? placeholder wrong in this example?
> >>
> >>
> >> t = ('hi', 'bye')
> >>
> >> self.connection.execute("INSERT INTO Personal (firstName, lastName)
> >> VALUES ?", t)
> >>
[snip]
>
> Thanks guys. I'll try this. I thought the ? stood for the whole tuple.

Definitely not. You could have a sql command like this -

cur.execute("UPDATE table SET col1 = ?, col2 = ? WHERE col3 = ? AND
col4 = ?",(1,2,3,4))

The parameters could be scattered throughout the command. Therefore the
substitution is one-for-one from left to right using the values in the
tuple.

Frank Millman



From geskerrett at hotmail.com  Wed Nov  8 06:48:37 2006
From: geskerrett at hotmail.com (geskerrett at hotmail.com)
Date: 8 Nov 2006 03:48:37 -0800
Subject: struggling with memory release using ctypes wrapper
In-Reply-To: <1162957336.662745.243560@m7g2000cwm.googlegroups.com>
References: <1162957336.662745.243560@m7g2000cwm.googlegroups.com>
Message-ID: <1162986517.575072.105480@m7g2000cwm.googlegroups.com>

Oops, found the problem in my code.
Sorry for wasting peoples time if you're viewing.



From paddy3118 at netscape.net  Sat Nov 18 02:01:07 2006
From: paddy3118 at netscape.net (Paddy)
Date: 17 Nov 2006 23:01:07 -0800
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
Message-ID: <1163833267.823022.107680@f16g2000cwb.googlegroups.com>

nateastle at gmail.com wrote:

> I have a simple assignment for school but am unsure where to go. The
> assignment is to read in a text file, split out the words and say which
> line each word appears in alphabetical order. I have the basic outline
> of the program done which is:
>
> def Xref(filename):
>     try:
>         fp = open(filename, "r")
>         lines = fp.readlines()
>         fp.close()
>     except:
>         raise "Couldn't read input file \"%s\"" % filename
>     dict = {}
>     for line_num in xrange(len(lines)):
>         if lines[line_num] == "":  continue
>         words = lines[line_num].split()
>         for word in words:
>             if not dict.has_key(word):
>                 dict[word] = []
>             if line_num+1 not in dict[word]:
>                 dict[word].append(line_num+1)
>     return dict
>
> My question is, how do I easily parse out punction marks and how do I
> sort the list and if there anything else that I am doing wrong in this
> code it would be much help.
Hi,
on first reading, you have a naked except clause that catches all
exceptions. You might want to try your program on a non-existent file
to find out the actual exception you need to trap for that error
message. Do you want the program to continue if you have no input file?

If you have not covered Regular Expressions, often called RE's then one
way of getting rid of puctuation is to turn the problem on its head.
create a string of all the characters that you consider as valid in
words then go through each input line discarding any character not *in*
the string. Use the doctored line for word extraction.

help(sorted) will start you of on sorting in python. Other
documentation sources have a lot more.

P.S. I have not run the code myself
P.P.S. Where is the functions docstring!
P.P.P.S. You might want to read up on enumerate. It gives another way
to do things when you want an index as well as each item from an
iterable but remember, the index given starts from zero.

Oh, and welcome to comp.lang.python :-)

- Paddy.



From david at boddie.org.uk  Thu Nov  9 11:06:52 2006
From: david at boddie.org.uk (David Boddie)
Date: 9 Nov 2006 08:06:52 -0800
Subject: ANN: PyQt v4.1 Released
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
	<1162831146.195927.296110@e3g2000cwe.googlegroups.com>
	<1163086763.536524.37710@h48g2000cwc.googlegroups.com>
Message-ID: <1163088412.025310.185250@m7g2000cwm.googlegroups.com>

Tool69 wrote:

> > That uses a port of an old syntax highlighting example from Qt 4.0. Someone
> needs to "port" the C++ example from Qt 4.2 to PyQt4.
>
> So, we've got no sample to use QScintilla2 ??

Well, this should get you started:

import sys
from PyQt4.QtGui import QApplication
from PyQt4.Qsci import QsciScintilla, QsciLexerPython

if __name__ == "__main__":
    app = QApplication(sys.argv)
    editor = QsciScintilla()
    lexer = QsciLexerPython()
    editor.setLexer(lexer)
    editor.show()
    editor.setText(open("qscintilla2_example.py").read())
    sys.exit(app.exec_())

QScintilla provides a selection of different lexers, so you might want
to experiment with those.

Good luck!

David



From aboudouvas at panafonet.gr  Wed Nov 22 07:50:00 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 22 Nov 2006 04:50:00 -0800
Subject: Python visual IDE
In-Reply-To: <45643e06$0$11154$426a74cc@news.free.fr>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
	<45643e06$0$11154$426a74cc@news.free.fr>
Message-ID: <1164199800.476217.224800@j44g2000cwa.googlegroups.com>


hmmm,,,ok, i see your point.
As i understand it, as a newcomer, it is a little cumbersome to right
the code in one ide,
"glue" the UI from another toll and all that stuff.

I know it works but if someone is coming from VS.Net, it seems a little
strange, at first.

I also saw that the wxWidgets is the more "feel natural" in all
platforms so i
believe that if an IDE is able to offer RAD capabilities and build upon
this
widget, it will be an awesome tool for Python programmers,
matches this way VS and other win RAD IDEs...

Thanks a lot for your post, i'll have a look at the programs you
mention!

King Kikapu

On Nov 22, 2:09 pm, Bruno Desthuilliers <o... at xiludom.gro> wrote:
> king kikapu wrote:
> > Hi to all,
>
> > i am not sure if this question really belongs here but anyway, here it
> > goes: I have seen a lot of IDEs for Python, a lot of good stuff but
> > actually none of them has what, for example, Visual Studio has: a
> > Visual Editor (with the  ability to place controls on forms etc etc),
> > or RAD
>
> > I know that there is Glade but does anybody knows of some product, or
> > an ongoing effort to this direction so i can have a look at ?
>
> > Coming from Windows and vs.net world, i think the only missing point
> > here is the integration of the Pyrthon with a RAD IDE...
>
> > Thanks a lot and i apologize if this isn't the correct place for this
> > question...If you use wxWidgets, you may want to have a look at projects like
> Boa-constructor or PythonCard. If you use QT/KDE, Eric3 offers good
> integration with QT Designer IIRC.
>
> Now as you can see, the problem with RAD tools is that they are specific
> to a given GUI toolkit. Python runs on a lot of platforms, and some of
> these platforms (ie Linux) are not tied to a specific GUI toolkit. So
> integrating the RAD tool in the IDE means you can't use this IDE with
> other GUI toolkits.
>
> Also, there's a tradition in the *n*x world about preferring small,
> highly specialized tools over huge monolithic do-it-all applications. As
> an example, I daily use half a dozen languages, and I wouldn't like to
> have to learn half a dozen IDEs. I'm much more productive with a good
> code editor, the command line, and a few external tools when needed.
>
> My 2 cents...
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'on... at xiludom.gro'.split('@')])"- Hide quoted text -- Show quoted text -



From python.list at tim.thechases.com  Tue Nov 21 09:33:37 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 21 Nov 2006 08:33:37 -0600
Subject: Vim scripts for editing Python?
In-Reply-To: <1164117947.465994.246510@k70g2000cwa.googlegroups.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>	<1164089307.390351.263980@j44g2000cwa.googlegroups.com>
	<1164117947.465994.246510@k70g2000cwa.googlegroups.com>
Message-ID: <45630E41.5080205@tim.thechases.com>

> For example, to auto-fold all function bodies while leaving
> the function names visible.

Do you mean

	:set foldmethod=indent

which does what I think you're describing...

> Also to auto-close braces like [], (), {}, autoclose quotes.

You can map whatever you like:

	:inoremap [ []<left>
	:inoremap ( ()<left>
	:inoremap { {}<left>
	:inoremap " ""<left>
	:inoremap ' ''<left>

which will do the trick for you.

As for the other things, I haven't monkeyed with them, but if you
drop by the vim mailing list, there are other smart cookies there
that can help you out.  I've heard of such abilities...just
haven't played with them.

-tkc




From mail at microcorp.co.za  Thu Nov 23 02:14:54 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 23 Nov 2006 09:14:54 +0200
Subject: Tkinter, main loop question.
References: <1164248529.501106.255990@e3g2000cwe.googlegroups.com>
Message-ID: <020001c70ecf$3ac42260$03000080@hendrik>

"Exod" <ratbasher at gmail.com> wrote:


> Don't know if its possible in this light-weight GUI toolset, but can i
> somehow hook up into the mainloop in it, for example if i were to
> create an internet application, i would need to keep recieving data
> from within it?

Its possible - use the call back mechanism to implement a ticker or stutter
thread, remembering that you cant block here, because then the gui stops.

If its a good idea is another question, because sockets wants to be the main
thread too.

but if you fire up another process for the comms, and use threads in front of
pipes, with queues to the ticker in the main loop, it works. Just don't call any
gui stuff from threads in the same process, only from the ticker or stutter
thread.

- Hendrik




From john106henry at hotmail.com  Fri Nov 17 14:48:36 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 11:48:36 -0800
Subject: remove a list from a list
In-Reply-To: <1163792832.404528.187950@k70g2000cwa.googlegroups.com>
References: <ejkv1u$ajf$1@sea.gmane.org><ejl13i$hqv$1@sea.gmane.org>
	<455E0A20.9000509@tim.thechases.com>
	<mailman.369.1163792062.32031.python-list@python.org>
	<1163792832.404528.187950@k70g2000cwa.googlegroups.com>
Message-ID: <1163792916.095832.259010@m73g2000cwd.googlegroups.com>

Scratch that.  b becomes all upper...

John Henry wrote:
> from sets import Set as set   # Python 2.3
>
> b = list( set([i.upper() for i in b) - set([i.upper() for i in a] ) )
>
>
> Rares Vernica wrote:
> > Yeah, I ended up doing a similar kind of loop. That is pretty messy.
> >
> > Is there any other way?
> >
> > Thanks,
> > Ray
> >
> > Tim Chase wrote:
> > >> That is a nice solution.
> > >>
> > >> But, how about modifying the list in place?
> > >>
> > >> That is, l would become ['c', 'D'].
> > >>
> > >>>  >>> e = ['a', 'b', 'e']
> > >>>  >>> l = ['A', 'a', 'c', 'D', 'E']
> > >>>  >>> s = set(e)
> > >>>  >>> [x for x in l if x.lower() not in s]
> > >>> ['c', 'D']
> > >
> > >
> > > Well...changing the requirements midstream, eh? ;-)
> > >
> > > You can just change that last item to be a reassignment if "l" is
> > > all you care about:
> > >
> > >  >>> l = [x for x in l ...]
> > >
> > > Things get a bit hairier if you *must* do it in-place.  You'd
> > > have to do something like this (untested)
> > >
> > > for i in xrange(len(l), 0, -1):
> > > 	if l[i-1].lower() in s:
> > > 		del l[i-1]
> > >
> > >
> > > which should do the job.
> > > 
> > > -tkc
> > > 
> > > 
> > >



From billjosephson at hotmail.com  Thu Nov  9 01:52:47 2006
From: billjosephson at hotmail.com (BillJosephson)
Date: 8 Nov 2006 22:52:47 -0800
Subject: Can not download plugins for jEdit (help!!)
Message-ID: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>

Hi all. I am trying to use jEdit, but can't seem to download
any plugins. I go to Plugin Manager, and select Download
options. I update the mirro and can see lots of servers.
I select the first (plugin central default) and say apply.
In the Update dialogues bottom window, I see a msg saying
"Dowloading plugin list from jedit.plugins.org but after
a couple seconds it disappears. Inveitably when I select
Console and the click install, it give me "An I/0 error
occurred (Connection refused: connect)

If anyone knows why i can't connect, in info about it would be
a big help.

Thanks in advance.....



From korvus at gmail.com  Thu Nov 16 19:48:29 2006
From: korvus at gmail.com (Jeff  Poole)
Date: 16 Nov 2006 16:48:29 -0800
Subject: cPickle problems
In-Reply-To: <1163723175.530850.185990@m73g2000cwd.googlegroups.com>
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
Message-ID: <1163724509.572724.199720@f16g2000cwb.googlegroups.com>

To clutter this up with yet another message, this is what happens if I
use pickle instead of cPickle.  Same error, but it has more of a stack
trace so someone more advanced than myself might be able to pick out
what is going amiss.

Traceback (most recent call last):
  File "./generateTools.py", line 50, in ?
    proj.findVHDLfiles("vhd")
  File "/cygdrive/c/fpga/tools/FPGAProject.py", line 631, in
findVHDLfiles
    cpickle.dump(filenameToClassDic,pickleFile,PICKLE_FILE_PROTOCOL)
  File "/usr/lib/python2.4/pickle.py", line 1382, in dump
    Pickler(file, protocol, bin).dump(obj)
  File "/usr/lib/python2.4/pickle.py", line 231, in dump
    self.save(obj)
  File "/usr/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.4/pickle.py", line 663, in save_dict
    self._batch_setitems(obj.iteritems())
  File "/usr/lib/python2.4/pickle.py", line 677, in _batch_setitems
    save(v)
  File "/usr/lib/python2.4/pickle.py", line 338, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/python2.4/pickle.py", line 433, in save_reduce
    save(state)
  File "/usr/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.4/pickle.py", line 663, in save_dict
    self._batch_setitems(obj.iteritems())
  File "/usr/lib/python2.4/pickle.py", line 677, in _batch_setitems
    save(v)
  File "/usr/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.4/pickle.py", line 614, in save_list
    self._batch_appends(iter(obj))
  File "/usr/lib/python2.4/pickle.py", line 629, in _batch_appends
    save(x)
  File "/usr/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.4/pickle.py", line 576, in save_tuple
    save(element)
  File "/usr/lib/python2.4/pickle.py", line 338, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib/python2.4/pickle.py", line 433, in save_reduce
    save(state)
  File "/usr/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib/python2.4/pickle.py", line 663, in save_dict
    self._batch_setitems(obj.iteritems())
  File "/usr/lib/python2.4/pickle.py", line 677, in _batch_setitems
    save(v)
  File "/usr/lib/python2.4/pickle.py", line 313, in save
    rv = reduce(self.proto)
  File "/usr/lib/python2.4/copy_reg.py", line 83, in _reduce_ex
    dict = getstate()
TypeError: 'str' object is not callable


Jeff  Poole wrote:
> Oh, and I suppose I should provide some version information:
>
> $ python
> Python 2.4.3 (#1, May 18 2006, 07:40:45)
> [GCC 3.3.3 (cygwin special)] on cygwin
>
>
> Jeff  Poole wrote:
> > This is going to be a pretty vague message because it involves a large
> > block of code I'd rather avoid posting.  Basically, I've been pickling
> > a dictionary of instances of a class I've created (which contains
> > references to other instances of other classes).  At some point in the
> > last few weeks, pickling has stopped working with the following error:
> >
> > Traceback (most recent call last):
> >   File "./generateTools.py", line 50, in ?
> >     proj.findVHDLfiles("vhd")
> >   File "/cygdrive/c/fpga/tools/FPGAProject.py", line 630, in
> > findVHDLfiles
> >     cpickle.dump(filenameToClassDic,pickleFile,PICKLE_FILE_PROTOCOL)
> >   File "/usr/lib/python2.4/copy_reg.py", line 83, in _reduce_ex
> >     dict = getstate()
> > TypeError: 'str' object is not callable
> >
> >
> > Does anyone have any idea why this might be failing in this way?  It's
> > driving me crazy.  If need be I can probably provide the code to the
> > class, though it's about 1000 lines, most of which is PyParsing code.
> > I appreciate any help you guys can provide.
> > 
> > 
> > Jeff



From metalzong at 163.com  Thu Nov 30 03:02:31 2006
From: metalzong at 163.com (Metal Zong)
Date: Thu, 30 Nov 2006 16:02:31 +0800
Subject: [help] Is it true to call obj.__str__() while executing
	"printobj"?
In-Reply-To: <76fd5acf0611291809n6317e159j4d255dafabbda177@mail.gmail.com>
Message-ID: <456E93DA.009A9C.11690>

Thanks. Please refer to following snipt:

1 >>> class Printable(type):
 2 ...   def __str__(cls):
 3 ...     return "This is class %s" % cls.__name__
 4 ...
 5 >>> class C(object):
 6 ...   __metaclass__ = Printable
 7 ...
 8 >>>
 9 >>> C.__str__
10 <slot wrapper '__str__' of 'object' objects>
11 >>>
12 >>> print C
13 This is class C

I see, name resolving will follow instance, bases (determined by meta-method
mro() ), the last is it's metaclasse. Hence, line 10 shows the " slot
wrapper '__str__' of 'object' objects" by I was surprised when I saw line 13
- "print" statement calls str() and the latter one calls obj.__str__() but
it seems "obj.__str__" is different from "obj.__str__()" and I was confused
by this difference.

- Tommy

-----Original Message-----
From: python-list-bounces+metalzong=163.com at python.org
[mailto:python-list-bounces+metalzong=163.com at python.org] On Behalf Of
Calvin Spealman
Sent: Thursday, November 30, 2006 10:09 AM
To: tzong at sigma-rt.com; python-list at python.org
Subject: Re: [help] Is it true to call obj.__str__() while executing
"printobj"?

On 11/29/06, Tommy Zong <tzong at sigma-rt.com> wrote:
>
>
>
>
>
>
> Hi,
>
>
>
> I am learning metaclass by reading "Metaclass programming in Python, Part
> 2". I have a question as following and had tried to search from internet
and
> also have read the article "Unifying types and classes in Python 2.2" but
> failed to get satisfied answer. Could you please give me any comments to
> enlighten me? Thank you very much.
>
>
>
> {{{
>
> #
>
> #         inheritance         inheritance
>
> # object -------------> type -------------> Printable(Printable.__str__)
>
> #   |                                           .
>
> #   |                                           .
> instantiation
>
> #   |                                           .
>
> #   |                                           v
>
> #    ----------------------------------------> C(?)
>
> #                                               .
>
> #                                               .
> instantiation
>
> #                                               .
>
> #                                               v
>
> #                                              c(?)
>
> #
>
> >>> class Printable(type):
>
> ...   def __str__(cls):
>
> ...     return "This is class %s" % cls.__name__
>
> ...
>
> >>> class C(object):
>
> ...   __metaclass__ = Printable
>
> ...
>
> >>> print C                                       #
> equivalent to print Printable.__str__(C)
>
> This is class C
>
> >>> c = C()
>
> >>> print c                                       #
> equivalent to print C.__str__(c)
>
> <__main__.C object at 0x1870dacc>
>
>
>
> >>> C.__str__
>
> <slot wrapper '__str__' of 'object' objects>
>
> >>> print C
>
> This is class C
>
> }}}
>
>
>
> The question is why Printable.__str__ is invoked while executing "print C"
> but "C.__str__" shows it is resolved as "objct.__str__"?
>
>
>
> Wish I can get reply from you. Really thanks.
>
>
>
> Best Regards,
>
>
>  Tommy Zong
>  Chengdu Jiehua Technologies Co, Ltd.
>  Tel: 86-28-85148500-654
>  Mail: tzong at sigma-rt.com
>  MSN: metalzong at 163.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>

You are defining a metaclass, a class, and an instance of this class.
You are defining a method in the metaclass. When the name is looked up
on any object, if the object has no attribute of that name (no __str__
in this case) the search moves to its type, and from there to each
type in the MRO (method resolution order). When you follow through the
lookup rules, from object to type to supertypes, you see that none of
the metaclasses for any of the classes in your object's MRO comes into
play. Those are types of the types. They come into play when you
lookup an attribute on the types themselves only, not on the instances
of those types.

That is why you see the bahavior you do. Of course, it wouldnt make
sense for this method to be used with the instances, because they
aren't classes, so the message would be incorrect.

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/
-- 
http://mail.python.org/mailman/listinfo/python-list




From sjmachin at lexicon.net  Tue Nov 28 13:49:48 2006
From: sjmachin at lexicon.net (John Machin)
Date: 28 Nov 2006 10:49:48 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <mailman.801.1164715357.32031.python-list@python.org>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
	<mailman.801.1164715357.32031.python-list@python.org>
Message-ID: <1164739788.335821.239100@n67g2000cwd.googlegroups.com>

Fredrik Lundh wrote:
> John Machin wrote:
>
> > I'm extremely agnostic about the spelling :-) IOW I'd be very glad of
> > any way [pure Python; e.g. maintaining my own version of the array
> > module doesn't qualify] to simply and rapidly create an array.array
> > instance with typecode t and number of elements n with each element
> > initialised to value v (default to be the zero appropriate to the
> > typecode).
>
>      array(t, [v])*n
>
> </F>

Thanks, that's indeed faster than array(t, [v]*n) but what I had in
mind was something like an additional constructor:

array.filledarray(typecode, repeat_value, repeat_count)

which I speculate should be even faster. Looks like I'd better get a
copy of arraymodule.c and start fiddling.

Anyone who could use this? Suggestions on name? Argument order?

Functionality: same as array.array(typecode, [repeat_value]) *
repeat_count. So it would cope with array.filledarray('c', "foo", 10)

I'm presuming an additional constructor would be better than doubling
up on the existing one:

array.array(typecode[, initializer)
and
array.array(typecode[, repeat_value, repeat_count])

Cheers,
John



From gabrielg_laburando at yahoo.com.ar  Wed Nov  8 13:27:45 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Wed, 08 Nov 2006 15:27:45 -0300
Subject: unpickling Set as set
In-Reply-To: <1162974390.329872.170540@e3g2000cwe.googlegroups.com>
References: <1162967110.642248.54400@m7g2000cwm.googlegroups.com>
	<1162968716.356479.124850@m7g2000cwm.googlegroups.com>
	<1162974390.329872.170540@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108152041.05a6cda8@yahoo.com.ar>

At Wednesday 8/11/2006 05:26, George Sakkis wrote:

>Or you may have this done automatically by hacking the Set class:
>
>from sets import Set
>import cPickle as pickle
>
>Set.__reduce__ = lambda self: (set, (self._data,))
>
>s = Set([1,2,3])
>x = pickle.dumps(s)
>print pickle.loads(x)
>
>
>This doesn't work though if you have already pickled the Set before
>replacing its __reduce__, so it may not necessarily be what you want.
>If there is a way around it, I'd like to know it.

Perhaps registering a suitable reduce function in the copy_reg module.
If the sets were pickled alone, and it's not too much trouble, using: 
a_set = set(a_set) just after unpickling may be enough.
And if they were instance attributes, __setstate__ on the class can 
do the conversion.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From thn at mail.utexas.edu  Thu Nov  2 01:00:02 2006
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 1 Nov 2006 22:00:02 -0800
Subject: can I import the module twice (under differnet names)
In-Reply-To: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>
References: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>
Message-ID: <1162447202.188282.240440@h48g2000cwc.googlegroups.com>

alf wrote:
> Hi,
>
> wonder if in the python I could treat modules imorts like classes
> instances. It means I could import it twice or more times under
> different names.
>
> --
> alfz1

You can always give any object as many names as you want:
>>> import sys
>>> s1 = sys
>>> s2 = sys
>>> s1.path
['', '/usr/local/bin', '/bin', '/sbin', '/usr/bin', '/usr/sbin',...
>>> s2.argv
['']

Or maybe you're looking for the builtin function reload?
>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
...
>>> import this  #note nothing happens
>>> reload(this)  #runs again
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
....


Neither one of these methods are too common in practice I think.  Could
you tell us why you want to import a module more than once?
-Tom



From onurb at xiludom.gro  Wed Nov 22 06:54:22 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 22 Nov 2006 12:54:22 +0100
Subject: Trying to understand Python objects
In-Reply-To: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <45643a6f$0$7761$426a74cc@news.free.fr>

walterbyrd wrote:
> Reading "Think Like a Computer Scientist" I am not sure I understand
> the way it describes the way objects work with Python.
> 
> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?

Apart from a few special cases (mainly builtin types or new-style
classes using slots IIRC), yes.

Now wether this is a good idea is another question. As far as I'm
concerned, I do use this feature, but only for special cases, and almost
only in metaclasses or other special 2-stages init.

> 2) Are classes typically created like this:
> 
> class Point:
>   pass
> 
> Then attributes are added at some other time?

Nope. The canonical idiom is to use the initializer:

class Point(object):
  def __init__(self, attr1, attr2):
    self.attr1 = attr1
    self.attr2 = attr2
    self.attr3 = 42


> 3) What is with the __underscores__ ??

"magic" methods or attributes. The initializer ('__init__') is one of
them, which is called at instance creation time. Most of the magic
__methods__ are used to implement or override operators. You'll find the
relevant documentation around here:
http://docs.python.org/ref/specialnames.html


> 4) Are parameters passed to an class definition?
> 
> class Whatever(params):
>    pass

A class statement is not a function definition statement. Here, you ask
for a class Whatever inheriting from class params. Cf the above point
about the __init__ method for passing args at instanciation.

> I sort-of understand the way objects work with PHP. With PHP, the
> classes are defined in one place - sort of like a function. 

FWIW, Python's classes actually are callable objects (just like
functions are callable objects). To instanciate a class, you just call
the class, no 'new' keyword needed.

> To me, that
> makes more sense.

<?php

class Obj {
  // pass
}

$obj = new Obj();
$obj->name = "toto";
echo $obj->name;

?>

Just like Python (and Javascript FWIW), PHP objects are mostly hashtable
in disguise. But - having some experience with both PHP and Python (and
some other OOPLs), I can tell you that Python's object model is far
superior to PHP's one.

The only "gotcha" here wrt/ most other object models is that attributes
defined in the class statement body (ie, outside methods) are attached
to the class object itself (and then shared by all instances of the
class), not to instances themselves. Instance attributes initialisation
is usually done in the __init__(self, ...) method.

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From matthiaswinterland at web.de  Thu Nov  9 17:36:20 2006
From: matthiaswinterland at web.de (Matthias Winterland)
Date: Thu, 09 Nov 2006 23:36:20 +0100
Subject: Simple question to split
Message-ID: <4rhov8Frk45nU1@mid.uni-berlin.de>

Hi,

I have a simple question. When I read in a string like:
a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
single split-call?

Thx,
Matthias


From Leo.Kislov at gmail.com  Fri Nov 10 18:18:52 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 10 Nov 2006 15:18:52 -0800
Subject: comparing Unicode and string
In-Reply-To: <slrnel9mnm.jk.horpner@FIAD06.norwich.edu>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>
	<pan.2006.10.23.10.15.24.383843@gmx.net>
	<1163120577.369133.279080@h48g2000cwc.googlegroups.com>
	<slrnel8v1a.1r8.horpner@FIAD06.norwich.edu>
	<mailman.2049.1163183058.11739.python-list@python.org>
	<slrnel9mnm.jk.horpner@FIAD06.norwich.edu>
Message-ID: <1163200732.438155.306400@m73g2000cwd.googlegroups.com>

Neil Cerutti wrote:
> On 2006-11-10, Steve Holden <steve at holdenweb.com> wrote:
> >>> But I don't insist on my PEP. The example just shows just
> >>> another pitfall with Unicode and why I'll advise to any
> >>> beginner: Never write text constants that contain non-ascii
> >>> chars as simple strings, always make them Unicode strings by
> >>> prepending the "u".
> >>
> >> That doesn't do any good if you aren't writing them in unicode
> >> code points, though.
> >
> > You tell the interpreter what encoding your source code is in.
> > It then knows precisely how to decode your string literals into
> > Unicode. How do you write things in "Unicode code points"?
>
> for = u"f\xfcr"

Unless you're using unicode unfriendly editor or console, u"f\xfcr" is
the same as u"f?r":

>>> u"f\xfcr" is u"f?r"
True

So there is no need to write unicode strings in hexadecimal
representation of code points.

  -- Leo



From vmalloc at gmail.com  Tue Nov 21 03:53:56 2006
From: vmalloc at gmail.com (Rotem)
Date: 21 Nov 2006 00:53:56 -0800
Subject: platform.python_version_tuple
Message-ID: <1164099236.485144.20520@e3g2000cwe.googlegroups.com>

Hi Everyone,

I've been wondering about platform.python_version_tuple API, which is a
bit misleading.
The fact is that this returns under both python2.4 and 2.5 a list, and
not a tuple.

This introduces strange semantics, due to __cmp__ on lists and tuples.

platform.python_version_tuple() >= ('2', '5')   # returns False under
python 2.5
platform.python_version_tuple() >= ['2', '5']   # returns True under
python 2.5

I believe this should be changed, especially since the word 'tuple'
appears in the function name...

What do you think?



From saml at al.com.au  Mon Nov  6 23:23:00 2006
From: saml at al.com.au (Sam Loxton)
Date: Tue, 07 Nov 2006 15:23:00 +1100
Subject: Nested Dictionary Sorting
Message-ID: <45500A24.2090800@al.com.au>

Hi,

I am fairly new to the python language and am trying to sort a nested 
Dictionary of a Dictionary which I wish to sort by value. The dictionary 
does not have to be restructured as I only need it sorted in this way 
for printing purposes.

The following is an example of my Dictionary printed with 'print 
dictionary.items()', where '2329513' is the key of the first hash, 'ops' 
is the key of the second hash and '50.0' is the value of the second hash 
which I would like to sort by:
[('2329513', {'ops': 20.0}), ('2329492', {'ops': '80'}), ('2329490', 
{'ops': '50'})]

I hope to sort these first keys by the value of the 'ops' key from 
highest to lowest value to give the following result:
[('2329492', {'ops': '80'}), ('2329490', {'ops': '50'}), ('2329513', 
{'ops': 20.0})]

Thanks in advance for any help,
Sam.



 


From rcs at bgoark.no  Fri Nov 17 20:20:37 2006
From: rcs at bgoark.no (baalbek)
Date: Sat, 18 Nov 2006 02:20:37 +0100
Subject: explicit self revisited
In-Reply-To: <ejaq4b$56h$1@online.de>
References: <ej5fuv$a4a$1@online.de>
	<pan.2006.11.12.02.42.17.839194@REMOVE.THIS.cybersource.com.au>
	<ejaq4b$56h$1@online.de>
Message-ID: <455e5fe0$0$8000$c83e3ef6@nn1-read.tele2.net>

Peter Maas wrote:

> No magic. Just a dot. But perhaps a dot is too tiny. We could take JUST_ME
> or ME_AND_BOBBY_MCGEE instead, of course as a reserved keyword followed 
> by a
> dot ;)

Why a dot, and not a @, like in Ruby and Perl?

I think a dot is a particular bad idea, not the least due to poorer 
readability of code (and thou shall not underestimate the readability of 
code!).

Baalbek


From robin at reportlab.com  Thu Nov  9 09:39:27 2006
From: robin at reportlab.com (Robin Becker)
Date: Thu, 09 Nov 2006 14:39:27 +0000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1163072637.924217.90610@h54g2000cwb.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>
	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>
Message-ID: <45533D9F.5020002@chamonix.reportlab.co.uk>

Paul Boddie wrote:

> My impression is that POSH isn't maintained any more and that work was
> needed to make it portable, as you have observed. Some discussions did
> occur on one of the Python development mailing lists about the
> possibility of using shared memory together with serialisation
> representations faster than pickles (which also don't need to be
> managed as live objects by Python), and I think that this could be an
> acceptable alternative.
> 
.......

your impression is correct, when I contacted the author some while ago he 
maintained that it was a proof of concept only. When I compiled this today with 
python-2.4.2 the example fails with this rather cryptic message

~/devel/posh/examples:
$ python Matrix.py
Traceback (most recent call last):
   File "Matrix.py", line 6, in ?
     import posh
   File "/usr/local/lib/python2.4/site-packages/posh/__init__.py", line 14, in ?
     import _core
RuntimeError: semaphore set creation failed

but that's most likely something to do with not allocating a semaphore of the 
right sort or something.

I think it uses sysv semaphores and although freeBSD 6 has them perhaps there's 
something I need to do to allow them to work.


> Paul
> 


-- 
Robin Becker



From p.lavarre at ieee.org  Thu Nov  9 20:03:00 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 17:03:00 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
	<1163115840.190634.5800@m73g2000cwd.googlegroups.com>
Message-ID: <1163120580.762226.22160@k70g2000cwa.googlegroups.com>

> > when talking the 1960's lingo
> > ...
> > X12Inquiry = 0x12
> > xxs = [0] * 6
> > xxs[0] = X12Inquiry
> > xxs[4] = allocationLength
> > rq = ''.join([chr(xx) for xx in xxs])
>
> It looks wrong (and a few other adjectives),

Ah, we agree, thank you for saying.

> Looks like little-endian 4-byte integer
> followed by 2-byte integer ... what's wrong with struct.pack("<IH",
> X12Inquiry, allocationLength) ????

Pack '<IH' doesn't match how the code that I'm refactoring thinks about
these things.

The people who wrote this stuff forty years ago were thinking of bit
fields - here bit lengths of 8 then 3 then 21 then 8 then 8 bits -
cheating only when the bit boundaries happened to hit byte boundaries.

Yes, as you describe in this example, I could cheat when the boundaries
happen to hit H or I boundaries as well, but then I'm still left coping
with the cases where the fields split on byte boundaries that are not H
or I boundaries, such as the example:

> > skip = 0x123456; count = 0x80
> > hi, lo = divmod(skip, 0x10000)
>
> Does it do what you asked (one pack call instead of three)????

One pack call, not three, yes.

Shatters the 3 byte int into 1 and 2 bytes by divmod of (0xFFFF + 1),
yes.

> > I guess you're asking me ...
> > to show more plainly that indeed I am trying
> > to make sense of every word of every answer 

Am I helping?



From fredrik at pythonware.com  Fri Nov  3 14:25:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 20:25:08 +0100
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
Message-ID: <eig52k$icv$1@sea.gmane.org>

vd12005 at yahoo.fr wrote:

> i would like to sort(ed) and reverse(d) the result of many huge
> dictionaries (a single dictionary will contain ~ 150000 entries). Keys
> are words, values are count (integer).

not sure 150k entries qualify as huge, though, unless you're short on 
memory.

> i'm wondering if i can have a 10s of these in memory, or if i should
> proceed one after the other.

why not just try it out?

> but moreover i'm interested in saving theses as values, keys sorted and
> reversed (ie most frequent first), i can do it with sort from unix
> command but i wonder how i should do it with python to be memory
> friendly.
> 
> can it be done by using :
> 
> from itertools import izip
> pairs = izip(d.itervalues(), d.iterkeys())
> for v, k in reversed(sorted(pairs)):
>     print k, v
> 
> or will it be the same as building the whole list ?

sorted() needs access to all data, so it'll build a list, even if you 
feed it a generator.  you will have to test it yourself, but I suspect 
that the most memory-efficient way to do what you want could be:

     items = d.items()
     items.sort(key=operator.itemgetter(1), reverse=True)

the items list would require a couple of megabytes for 150k dictionary 
entries, or so.  the key map needs some memory too, but the rest of the 
sort is done in place.

</F>



From martin at v.loewis.de  Thu Nov  9 15:02:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 09 Nov 2006 21:02:06 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eivv9k$uoe$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162947569.228388.16940@m7g2000cwm.googlegroups.com>
	<eit1ab$q9j$1@news.albasani.net>
	<7xy7qlom0b.fsf@ruckus.brouhaha.com>
	<eivv9k$uoe$1@news.albasani.net>
Message-ID: <4553893e$0$13310$9b622d9e@news.freenet.de>

robert schrieb:
>>> what about speed. Is it true that IronPython is almost as fast as
>>> C-Python meanwhile?
> 
> thus there would be crash if 2 threads use the global variables
> (module.__dict__) of a module?

IronPython uses the .NET virtual machine. That, in itself, gives
consistency guarantees. Read the ECMA IL specification to find
out what the consistency model is.

Regards,
Martin


From fredrik at pythonware.com  Thu Nov 23 10:22:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 16:22:59 +0100
Subject: ImportError: No module named getopt
References: <1164294464.445025.326640@f16g2000cwb.googlegroups.com>
Message-ID: <ek4ecj$tc0$1@sea.gmane.org>

"prashant" wrote:

>I am running a python script which has the line
>
> import getopt, sys, os, re, string
>
> And i get the error
>
> ImportError: No module named getopt
>
> Could you please point out a possible solution for this?

looks like a broken installation.  try running the script as

    python -vv script.py

and see where it looks for the getopt module.

is the ImportError all you get, btw ?  it doesn't complain about site.py before
that ?

</F> 





From ian_stephenson at   Sat Nov  4 01:25:14 2006
From: ian_stephenson at  (Ian Stephenson)
Date: Sat, 4 Nov 2006 17:25:14 +1100
Subject: Converting Microsoft Works databases.... *shudder*
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
Message-ID: <12kq0i5akeo8150@corp.supernews.com>

I have Works 8.0 and you can SAVE AS to dBase IV format.  Not sure for other 
versions.

Regards,
Ian


"Michael B. Trausch" <"mike$#at^&nospam!%trauschus"> wrote in message 
news:upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d at comcast.com...
>I was wondering if anyone has had any experience with this.  Someone I
> know is trying to move away from Microsoft Works, and I am trying to
> look into a solution that would convert their data in a lossless fashion
> to a more modern format.  The database has more than 65K rows, so
> converting it to be an Excel spreadsheet, would, AFAIK, not be an option.
>
> It would seem that MS Works can export the database as a DBF format
> database, though I have not tried it.  Before I get started, I was
> wondering if anyone has been through this problem in the past and used
> Python to solve the problem.  Knowing nearly nothing about the DBase
> family of application software, and database formats, I find myself
> feeling like the information out there is, frankly, a bit overwhelming.
>
> Would the recipe specified in the "dbf to csv" thread be useful here for
> a file in DBase IV format?  It of course uses the same extension, but I
> am not sure if the file semantics are at all similar.  The idea at the
> end would be to probably create a database on an small SQL server (like
> MySQL) and let the person access their data using ODBC on their Windows
> workstation so that they can create form letters and the like.  They do
> not have access to MS Office's Access product, nor do they wish to use
> OOo Base (and I can't say that I blame them -- it seems to crash far too
> often to be considered reliable stuff).
>
> -- Mike 




From rrr at ronadam.com  Fri Nov 17 18:02:29 2006
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 17 Nov 2006 17:02:29 -0600
Subject: Decimal() instead of float?
In-Reply-To: <1163800304.5107.179.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>	<ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper>	<ejl5s5$334$1@sea.gmane.org>
	<1163800304.5107.179.camel@pepper>
Message-ID: <ejlf9b$vto$1@sea.gmane.org>

Michael B. Trausch wrote:
> On Fri, 2006-11-17 at 21:25 +0100, Fredrik Lundh wrote:
>> > Some of the lat/long pairs that I have used seem to come out fine, but 
>> > some do not.  Because the mathmatics used with them involve complex 
>> > equations when determining distance and the like, any error gets 
>> > massively compounded before a final result is evident.
>>
>> sorry, but I don't think you have the slightest idea what you're doing, 
>> really.
>>
> 
> Sure, I do.  Let's say that I want to work with the latitude 
> 33.6907570.  In Python, that number can not be stored exactly without 
> the aid of decimal.Decimal().
> 
>  >>> 33.6907570
> 33.690756999999998
>  >>>

> As you can see, it loses accuracy after the 6th decimal place.  That's 
> not good enough:  I have 8 numbers that need to be exact, and I am only 
> getting six.  That error will propagate throughout any multiplication or 
> division problem.  The error /compounds/ itself:

Actually it doesn't loose accuracy until the final decimal place, which is 
probably much smaller than the accuracy you need unless you are doing 
theoretical research on very small time frames with ideal numbers.  Then, yes 
you may need to use either numeric or decimal which can support a much higher 
precision.  Numeric is much faster so I would try that first.

On the other hand, if you are writing an application that does practical 
calculations on real measured data, then you have two sources of errors to be 
concerned with.  One is the unseen error from the actual measurements which is 
probably much bigger than the error you are trying to avoid.  And the other is 
the minuscule error caused by the binary C representation.

For example if a device measures a value of 33.6907570,  it is a measurement 
that can be off by +- 0.0000005 (or more, depending on the accuracy of the 
device), compared with the error of 0.0000000000000001, it is huge.  So if you 
are not already taking into account the larger error, by rounding your results 
to a proper number of significant digits, then you may have a much bigger 
problem, and a much larger real error than you realize.

So, you first need to manage the errors introduced when the data is created.  By 
doing that, you will probably find it will also resolve the smaller error you 
are concerned about here.

Cheers,
    Ron





From martin at v.loewis.de  Fri Nov 17 20:05:37 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 18 Nov 2006 02:05:37 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <1163759435.551233.76030@j44g2000cwa.googlegroups.com>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<455CED78.1060604@v.loewis.de>
	<bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>
	<455CF4BA.1050608@v.loewis.de>
	<1163759435.551233.76030@j44g2000cwa.googlegroups.com>
Message-ID: <455E5C61.5030502@v.loewis.de>

Leo Kislov schrieb:
> How about returning two lists, first list contains unicode names, the
> second list contains undecodable names:
> 
> files, troublesome = os.listdir(separate_errors=True)
> 
> and make separate_errors=True by default in python 3.0 ?

That would be quite an incompatible change, no?

Regards,
Martin


From ptmcg at austin.rr._bogus_.com  Sun Nov 19 01:45:28 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 06:45:28 GMT
Subject: cPickle problems
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
	<mailman.297.1163728684.32031.python-list@python.org>
	<1163730111.641857.142850@k70g2000cwa.googlegroups.com>
Message-ID: <c4T7h.314$_H5.223@tornado.texas.rr.com>

"Jeff Poole" <korvus at gmail.com> wrote in message 
news:1163730111.641857.142850 at k70g2000cwa.googlegroups.com...
> So when something tries to retrieve .__getstate__, it returns an empty
> string.  If I tell it to raise an AttributeException instead, then I
> get this message:
>
> TypeError: a class that defines __slots__ without defining __getstate__
> cannot be pickled
>
> I think I need to talk to the author of PyParsing about this one...
> Thanks for your help!
>
>
> Jeff

Jeff -

Sorry not to reply sooner, I have been out of town with limited access to 
c.l.py.  Also, I didn't really pick up on "cPickle problems" as a 
pyparsing-related post. :)

I would be happy to make ParseResults picklable, I didn't realize that this 
getattr behavior was defeating that capability.  I have had people 
successfully use pickle on pyparsing grammars, but have not had anyone 
report any pickle experience with ParseResults objects, either pro or con.

I have a test version of pyparsing with pickling support added, and it 
passes my simple unit tests.  I could send it to you if you would test it 
against your program.

-- Paul






From vatamane at gmail.com  Sun Nov 19 04:49:02 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 19 Nov 2006 01:49:02 -0800
Subject: Finding skilled pythonistas for micro-jobs?
In-Reply-To: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
Message-ID: <1163929742.444622.323610@f16g2000cwb.googlegroups.com>

  If you are agile it means that the developer is in constant
communication with the user/client often changing and updating the
requirements. The typical work that you specify though is not of that
nature because it a list of specifications and then the coder
implements it, and when done gets back to you.

 In other words, you will pay for not having a relationship with the
programmer. Theoretically just having the requirements and a set of
unit tests should do it, but in practice it might not work, stuff
_always_ comes up when you least expect it. Sometimes the clear goals
end up not being that clear to both you and a strange new programmer
you just met over email.

 There are other things to consider what if the person doesn't come
through? They end up doing something else or forget -- you wait for 3
days, your company expects a result and the programmer you just asked
to work for you does not deliver. Or what if they are not satisfied
with the pay because it took longer than expected. Also, what would you
do about taxes, technically  you are employing someone, a day job is
still a job. Theoretically one could run a company and never pay the
proper taxes because they pay their programmers per day through
Paypal...

 However, you do mention CS students.  I would suggest to find a local
university and befriend a professor. Then whenever you need a small job
ask him. He will know the students (who knows what, how well and so
on). Just based on a personal experience from my CS department you will
not have a shortage of candidates ( starving graduate students _will_
code for food ), and you get to meet the students in person if you so
desire, and then keep them on  your contact list.  An even better
advice -- get two students,  you will get a true xp team, they'll have
to split the pay but in case one is busy,  the other one will be there
for you. You can hire them as part time with no benefits and they can
put the work on their resume, which will be of great help for them.

Note: if your company is well known, you might even find students who
will help for free, just so they can put some work experience on their
resume...

Hope that helps,
Nick V.

darran wrote:
> I'm a partner in a design and technology studio that creates
> large-scale interactive exhibits for museums.  We are agile - by
> choice.   For big 6-12 month projects, we try and secure exceptional
> python talent on contract.  The python job board addresses this need.
>
> Every few weeks though I run up against a bite-sized programming
> problem begging to be farmed out by our small company.  The tasks
> themselves span the gamut from data wrangling (format conversions) to
> SWIG wrappers to Twisted to pyOpenGL.  Often the task is 1 or 2 days of
> work.  Not really big enough to warrant a job search, a contract, or
> even someone's full-time attention.  The type of problem that is
> perfectly suited to a CS student or daytime programmer looking to make
> some extra money.  Presently, when one of these jobs pops up, I just
> add 8-16 hours to my work week - much to the dismay of my 3-year old
> daughter who'd rather I pay someone and go to the park.  The nice thing
> though about our bite-sized jobs is that the goals are perfectly clear
> because we are religious in our use of unit testing and test-driven
> development.
>
> Any suggestions then for locating skilled Python/C++ programmers for
> these small (micro) jobs?  
> 
> Cheers,
> Darran.



From maxerickson at gmail.com  Thu Nov  2 12:47:04 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 2 Nov 2006 17:47:04 +0000 (UTC)
Subject: Converting a .dbf file to a CSV file
References: <C16F6BD4.477%Johanna.Pfalz@telus.net>
Message-ID: <Xns986F820751226maxericksongmailcom@80.91.229.5>

Johanna Pfalz <Johanna.Pfalz at telus.net> wrote:

> Is there a module/method in python to convert a file from .DBF
> format to .CSV format?
> 
> Johanna Pfalz
> 

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

There is an example provided.

max



From bearophileHUGS at lycos.com  Wed Nov 22 21:14:58 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 18:14:58 -0800
Subject: changing list items
In-Reply-To: <1164246882.289304.185580@e3g2000cwe.googlegroups.com>
References: <1164246882.289304.185580@e3g2000cwe.googlegroups.com>
Message-ID: <1164248098.763697.179680@j44g2000cwa.googlegroups.com>

A possibile first solution:

>>> alist = ['a','b','c','e','d','f']
>>> inf, sup = 2, 4
>>> alist[inf:sup] = ["t"] * (sup - inf)
>>> alist
['a', 'b', 't', 't', 'd', 'f']

Bye,
bearophile



From cvanarsdall at mvista.com  Wed Nov  8 13:21:36 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 08 Nov 2006 10:21:36 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163010004.3371.23.camel@localhost.localdomain>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>	
	<mailman.1861.1162937772.11739.python-list@python.org>	
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>	
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>	
	<1163001215.177739.238130@k70g2000cwa.googlegroups.com>	
	<45521E09.8050108@mvista.com>
	<1163010004.3371.23.camel@localhost.localdomain>
Message-ID: <45522030.9080808@mvista.com>

Cliff Wells wrote:
> On Wed, 2006-11-08 at 10:12 -0800, Carl J. Van Arsdall wrote:
>   
>> BartlebyScrivener wrote:
>>     
>
>   
>>> I agree. And Python is an extremely serious matter calling for decorum
>>> and propriety.
>>>   
>>>       
>> Lol, is it really now?  And I suppose its your definition of decorum and 
>> not mine right?  Things like that are always relative.  I think decorum 
>> would state that you should be an adult and not make a big deal out of 
>> nothing.  But that's just me, and as I said, its all relative.
>>     
>
> I think you missed the irony in his statement (or perhaps confused
> BartlebyScrivener with Beliavsky, who was the original plaintiff).
>
>   

Ah, yea, you are right.  My apologies.

-c


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From Tim.Golden at viacom-outdoor.co.uk  Tue Nov 28 06:00:47 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 28 Nov 2006 11:00:47 -0000
Subject: Accessing file metadata on windows XP
In-Reply-To: <1164704134.100569.101270@j72g2000cwa.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B636@vogbs009.gb.vo.local>

[wileyregister22 at gmail.com]

| When rightclicking a, for example, pdf file on windows, one normally
| gets a screen with three or four tags.  Clicking on one of the summary
| tag one can get some info like "title", "Author", "category", 
| "keyword"
| etc..

This (Delphi) article is about the most informative
I managed to dig up:

http://tinyurl.com/rx9hc


In short, you need to use the StgOpenStorageEx function
which the (pywin32) pythoncom module exposes. There are
quite a few caveats and you'll have to dig around for
flag/constants etc. but it should be quite do-able.

(Still don't have the time to try it myself, tho')

Happy Hunting!
TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Nov  9 16:29:39 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 09 Nov 2006 22:29:39 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
Message-ID: <4rhku3FriokeU2@mid.individual.net>

Michael Hobbs wrote:

> That is, assume that the expression ends at the colon, not at the
> newline. That would make this type of statement possible:
>     if color == red or
>       color == blue or
>       color == green:
>         return 'primary'
> Right now, such a statement would have to be spelled thus:
>     if color == red or \
>       color == blue or \
>       color == green:
>         return 'primary'
> or
>     if (color == red or
>       color == blue or
>       color == green):
>         return 'primary'

What about

if color == red or blue or green:
    return 'primary'

:)

Really, I think it'd be more mess to let the if statement's end only
depend on ":". I think there could arise situations that are messy
to debug. If I need multiple lines I prefer the parentheses.

Regards,


Bj?rn

-- 
BOFH excuse #295:

The Token fell out of the ring. Call us when you find it.



From george.sakkis at gmail.com  Wed Nov  1 01:11:04 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 31 Oct 2006 22:11:04 -0800
Subject: High level csv reader
Message-ID: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>

It occured to me that most times I read a csv file, I'm often doing
from scratch things like assigning labels to columns, mapping fields to
the appropriate type, ignoring some fields, changing their order, etc.
Before I go on and reinvent the wheel, is there a generic high level
wrapper around csv.reader that does all this ?

Thanks,
George



From filipwasilewski at gmail.com  Sun Nov 19 15:28:56 2006
From: filipwasilewski at gmail.com (Filip Wasilewski)
Date: 19 Nov 2006 12:28:56 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163791069.178490.198740@j44g2000cwa.googlegroups.com>
	<1163876220.121691.166740@h54g2000cwb.googlegroups.com>
	<1163879127.582231.268420@b28g2000cwb.googlegroups.com>
Message-ID: <1163968136.877566.51130@m7g2000cwm.googlegroups.com>

sturlamolden wrote:
[...]
> Here is the correct explanation:
>
> The factorization of the polyphase matrix is not unique. There are
> several valid factorizations. Our implementations corresponds to
> different factorizations of the analysis and synthesis poyphase
> matrices, and both are in a sence correct, although numerically
> different.

Please correct me if I'm missing something but I'm pretty sure that
choice of polyphase matrix factorization for given wavelet filter bank
has influence only on speed and numerical stability of computation and
not on the result itself. Particularly it should be possible to
reconstruct analysis and synthesis filters from polyphase matrices
regardless of the chosen factorization and both the discrete wavelet
transform and the wavelet lifting scheme should give corresponding
results for chosen wavelet (one can be rewritten in the form of other).

cheers,
fw



From phil at riverbankcomputing.co.uk  Sun Nov  5 17:16:21 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 5 Nov 2006 22:16:21 +0000
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1162754374.637359.322990@m73g2000cwd.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<1162754374.637359.322990@m73g2000cwd.googlegroups.com>
Message-ID: <200611052216.21213.phil@riverbankcomputing.co.uk>

On Sunday 05 November 2006 7:19 pm, Tool69 wrote:
> Thanks Phil,
> Can you put some hints about how to build QScintilla2 on Windows please
> ?

You mean something other than the installation instructions?

Phil


From insyte at gmail.com  Thu Nov 16 01:38:24 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 15 Nov 2006 22:38:24 -0800
Subject: More puzzling behavior while subclassing datetime
Message-ID: <1163659104.321150.322650@e3g2000cwe.googlegroups.com>

With assistance from Gabriel and Frederik (and a few old threads in
c.l.p.) I've been making headway on my specialized datetime class.  Now
I'm puzzled by behavior I didn't expect while attempting to use some of
the alternate datetime constructors.  Specifically, it appears if I
call GeneralizedTime.now() it calls the __new__ method of my class but
treats keyword arguments as if they were positional.

My class:

class GeneralizedTime(datetime):
    def __new__(cls, time=None, *args, **kwargs):
        print time, args, kwargs
        if isinstance(time, str):
            timeValues, tzOffset = cls.stringToTimeTuple(time)
            return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
**timeValues)
        elif isinstance(time, datetime):
            timeValues = time.timetuple()[:6]
            tzOffset = time.utcoffset()
            return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
*timeValues)
        elif time is None:
            print "Still gotta figure out now to do this one..."
        else:
            raise Invalidtime(time)
    @staticmethod
    def stringToTimeTuple(timeString):
         ... regex that parses timeString ...

>>> GeneralizedTime.today()
2006 (11, 16, 0, 35, 18, 747275, None) {}
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "gentime.py", line 106, in __new__
     raise InvalidTime(time)
gentime.InvalidTime: 2006

So it appears the time tuple is being passed to
GeneralizedTime.__new__, but the first value is being assigned to the
"time" argument.

Is this a side effect of how datetime is implemented?  Or am I doing
something screwy?

Thanks!

-Ben



From johnjsal at NOSPAMgmail.com  Wed Nov  8 10:54:24 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 10:54:24 -0500
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov  7)
In-Reply-To: <mailman.1857.1162935422.11739.python-list@python.org>
References: <eiqr89$20d$1@lairds.us>	<4550f7b9$0$14445$c3e8da3@news.astraweb.com>
	<mailman.1857.1162935422.11739.python-list@python.org>
Message-ID: <4551fda4$0$7047$c3e8da3@news.astraweb.com>

Chris Lambacher wrote:
> On Tue, Nov 07, 2006 at 04:15:39PM -0500, John Salerno wrote:
>> Cameron Laird wrote:
>>
>>>     Fredrik Lundh collects pyidioms:
>>> 	http://effbot.org/zone/python-lists.htm
>> Not working?
> perhaps http://effbot.org/zone/python-list.htm ?
> 

Thanks guys!


From duncan.booth at invalid.invalid  Wed Nov 22 14:02:48 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Nov 2006 19:02:48 GMT
Subject: utf - string translation
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
Message-ID: <Xns9883C1C005EDFduncanbooth@127.0.0.1>

hg <hg at nospam.com> wrote:

>> or in other words, put this at the top of your file (where "utf-8" is
>> whatever your editor/system is using):
>> 
>>    # -*- coding: utf-8 -*-
>> 
>> and use
>> 
>>    u'<text>'
>> 
>> for all non-ASCII literals.
>> 
>> </F>
>> 
> 
> Hi,
> 
> The problem is that:
> 
> # -*- coding: utf-8 -*-
> import string
> print len('a')
> print len('?')
> 
> returns 1 then 2

And if you do what was suggested and write:

# -*- coding: utf-8 -*-
import string
print len(u'a')
print len(u'?')

then you get:

1
1


From titogarcia_nospamplease_ at gmail.com  Mon Nov  6 10:04:03 2006
From: titogarcia_nospamplease_ at gmail.com (=?ISO-8859-1?Q?Ernesto_Garc=EDa_Garc=EDa?=)
Date: Mon, 06 Nov 2006 16:04:03 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <mailman.1809.1162822572.11739.python-list@python.org>
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
Message-ID: <einit4$9md$1@hefestos.uned.es>

> I've collected a bunch of list pydioms and other notes here:
> 
>    http://effbot.org/zone/python-list.htm

Thank you for the suggestion.

Ernesto


From deets at nospam.web.de  Mon Nov 27 17:54:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Nov 2006 23:54:58 +0100
Subject: Can you fix up wrapper function argument signatures?
In-Reply-To: <mailman.783.1164667277.32031.python-list@python.org>
References: <mailman.783.1164667277.32031.python-list@python.org>
Message-ID: <4t18m2F11nkd5U1@mid.uni-berlin.de>

Gerard Brunick schrieb:
> Consider:
> 
>  >>> def negate(func):
> ...     def wrapper(*args, **kwargs):
> ...         return not func(*args, **kwargs)
> ...     return wrapper
> ...
>  >>> def f(x):
> ...     return x > 10
> ...
>  >>> g = negate(f)
>  >>> g(20)
> False
>  >>> g(5)
> True
> 
> Now g has the argument signature of (*args, **kwargs).  Pop-up help in 
> Python
> Scripter(which is great by the way) tells me this, as does
> 
>  >>> g.func_code.co_varnames
> ('args', 'kwargs')
> 
> Is there anyway to fix this in negate?  I assume that I can't just start
> changing things in g.func_code since the bytecodes depend on the order
> of variables and lots of other stuff that I don't claim to understand.
> 
> Please note: From the new functools module, I see that one can set/update
> __module__, __name__, __doc__, and __dict__ using the corresponding 
> attributes
> from the wrapped function; however, none these fix up the argument 
> signature
> do they?  (I'm still running 2.4, so I haven't tried it.)

You can use Michele Simionato's decorator-module.

http://www.phyast.pitt.edu/~micheles/python/documentation.html

HTH,

Diez


From lowz06 at gmail.com  Sun Nov 19 02:24:08 2006
From: lowz06 at gmail.com (John (Z R) L)
Date: 18 Nov 2006 23:24:08 -0800
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I enter
	it?
Message-ID: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>

Hi all, I am very new to programming, and I chose to study the Python
language before C++. I am currently using the Wikibooks
"Non-Programmer's Tutorial for Python", and am up to the section "Who
goes there"?

http://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python/Who_Goes_There%3F

But after clicking "run module" for
"
a = 1
print a
a = a + 1
print a
a = a * 2
print a "

The results "1, 2, 4" didn't appear on the GUI screen, in fact nothing
did. And I clicked twice again, this time, it exited the Python GUI
program. I tried to enter back in, but it would quickly display

"1
2
4"

before exiting immediately within half a second. How do I stop the this
exiting from occurring.

Another problem I have is firewall. On my old computer (Windows 98)
when using Python GUI, it can't run modules because of some firewall.
But I thought firewalls were for internet sites only?! How do I fix
this??

Thank you in advance, and I apologize for my ignorance.



From sjmachin at lexicon.net  Tue Nov 21 01:55:07 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 22:55:07 -0800
Subject: move up a level
References: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
Message-ID: <1164092107.601786.98390@f16g2000cwb.googlegroups.com>

rplobue at yahoo.com wrote:
> alright, noob question: i want to open a file in a directory above the
> current one i'm in.  I'm trying to use myfile =
> open('../thefileiwant.txt', 'r')  but the ../ doesn't work.  How do i
> do it?

"Doesn't work" means what?
Have you looked at the getcwd and chdir functions in the os module?
You may wish to check that os.getcwd()'s notion of "current directory"
is the same as yours.
If you can't make any progress, ask again; do copy and paste the
relevant parts of your script instead of trying to describe what you
did. Also copy and paste output. Hint: use temporary print statements
to show what is happening.

HTH,
John



From samgurung at gmail.com  Tue Nov 28 03:44:20 2006
From: samgurung at gmail.com (linuxfreak)
Date: 28 Nov 2006 00:44:20 -0800
Subject: Libgmail
Message-ID: <1164703460.303062.58620@80g2000cwy.googlegroups.com>

hi guys,

just starting out on python and libgmail... any documentation for
libgmail outthere... basically what i want to do is develop an
application to use gmail like and ftp server... should be able to
upload files and download them as well.... 

thanks



From martin at v.loewis.de  Fri Nov 17 01:02:37 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 17 Nov 2006 07:02:37 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
Message-ID: <455d507d$0$18480$9b622d9e@news.freenet.de>

gabor schrieb:
> i also recommend this approach.
> 
> also, raising an exception goes well with the principle of the least
> surprise imho.

Are you saying you wouldn't have been surprised if that had been
the behavior? How would you deal with that exception in your code?

Regards,
Martin


From michael at stroeder.com  Wed Nov 15 12:41:59 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Wed, 15 Nov 2006 18:41:59 +0100
Subject: ANN: python-ldap-2.2.1
Message-ID: <mailman.263.1163690769.32031.python-announce-list@python.org>

Find a new release of python-ldap:

  http://python-ldap.sourceforge.net/

python-ldap provides an object-oriented API to access LDAP directory
servers from Python programs. It mainly wraps the OpenLDAP 2.x libs for
that purpose. Additionally it contains modules for other LDAP-related
stuff (e.g. processing LDIF, LDAPURLs and LDAPv3 schema).

----------------------------------------------------------------
Released 2.2.1 2006-11-15

Changes since 2.2.0:

Modules/
* Fix for Python 2.5 free(): invalid pointer (see SF#1575329)
* passwd() accepts None for arguments user, oldpw, newpw
  (see SF#1440151)

Lib/
* ldif.LDIFWriter.unparse() now accepts instances of
  derived dict and list classes (see SF#1489898)


From mailpitches at email.com  Tue Nov  7 14:34:32 2006
From: mailpitches at email.com (mp)
Date: 7 Nov 2006 11:34:32 -0800
Subject: Character encoding
Message-ID: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>

I have html document titles with characters like &gt;, &nbsp;, and
&#135. How do I decode a string with these values in Python?

Thanks



From metaperl at gmail.com  Mon Nov  6 16:20:39 2006
From: metaperl at gmail.com (metaperl)
Date: 6 Nov 2006 13:20:39 -0800
Subject: os x make install dies when compiling zipfile.py on 2.5 and 2.4.4
Message-ID: <1162848039.627681.22980@m7g2000cwm.googlegroups.com>

I've tried both Python 2.4.4 and Python 2.5. I'm trying to build from
source and install under a local directory Swarm since OpenSwarm
requires builds of Postgres and Python under it's control.

Ok, so I did

./configure --prefix=/Users/tbrannon/Documents/Python/Swarm/Python-2.5

but during make install I get this:

Compiling
/Users/tbrannon/Documents/Python/Swarm/Python-2.5/lib/python2.5/xmlrpclib.py
...
Compiling
/Users/tbrannon/Documents/Python/Swarm/Python-2.5/lib/python2.5/zipfile.py
...
make: *** [libinstall] Error 1
<!-- ~/Downloads/Python-2.5 tbrannon -->

and the same thing happens for Python 2.4.4 leaving me without a
platform-depedent install directory in my build.. any ideas?



From apardon at forel.vub.ac.be  Thu Nov  9 05:36:07 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Nov 2006 10:36:07 GMT
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
	<mailman.1948.1163035654.11739.python-list@python.org>
	<pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnel614m.8b8.apardon@rcpc42.vub.ac.be>

On 2006-11-09, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Thu, 09 Nov 2006 12:27:12 +1100, Ben Finney wrote:
>
>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>> 
>>> Ben Finney wrote:
>>> > If you pass a *mapping* of the
>>> > "I-might-want-to-add-more-in-the-future" values, then you get both
>>> > explicit *and* expandable, without an arbitrary unneeded sequence.
>>>
>>> Do you mean by using the **kwargs parameter?
>> 
>> No. 
>
> Well, that'll teach me to put words in your mouth.
>
> [snip]
>> If you have a group of named, semantically-related, unsequenced values,
>> pass them into the function as a mapping object (a dict object).
>
> Still, if you are doing this:
>
> mapping_object = {"strength": roll_dice(10),
>     "intelligence":roll_dice(10),
>     "dexterity":roll_dice(10)}
> my_character = Character(mapping_object)
>
> then there is little benefit to building the dict just for the purposes of
> passing it to Character(), never to use it again, not when you can do this:
>
> my_character = Character(strength: roll_dice(10), 
>     intelligence:roll_dice(10), dexterity:roll_dice(10))

But you will have to adapt this if you want extra or different
characteristics.

Personnally I would prefer something like:

  chardict = {}
  for char in characteristics:
    chardict[char] = roll_dice(10)

  my_character = Character(chardict)

This way you only have to keep your characteristics in one place.

> If you happen to already have collected your character attributes in a
> mapping object for some other reason, then well and good, pass it into the
> function. Otherwise, well, I believe the correct container for
> character attributes is a Character, not a dict.

What is wrong with keeping the character attributes in a dict in the
Character?

-- 
Antoon Pardon


From tim at tdw.net  Fri Nov 10 20:35:21 2006
From: tim at tdw.net (Tim Williams)
Date: Sat, 11 Nov 2006 01:35:21 +0000
Subject: string to list of numbers conversion
In-Reply-To: <R56828338.220.14885.1@mxextra>
References: <R56828338.220.14885.1@mxextra>
Message-ID: <9afea2ac0611101735p3d86780x58d1d90813ea68f4@mail.gmail.com>

On 5 Nov 2006 04:34:32 -0800, jm.suresh at no.spam.gmail.com
<jm.suresh at gmail.com> wrote:
> Hi,
>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>   Is there any alternative way?
>

?? I want to convert this into a python tuple of numbers ??

Do you want a python tuple with those numbers ie (1,2, 3,4),  or a
direct evaluation giving a tuple of tuples with those numbers, ie
((1,2), (3,4))

If the former then:

>>> a, l = '((1,2), (3,4), (-5,-6),(12,-13), (a,b), (0.1,0.2))', []
>>> for c in a.split(','):
... 	try:
... 		c = c.replace('(','').replace(')','')
... 		if '.' in c: l.append(float(c))
... 		else: 	l.append(int(c))
... 	except: pass
...
>>> tuple(l)
(1, 2, 3, 4, -5, -6, 12, -13, 0.10000000000000001, 0.20000000000000001)
>>>

Its not so good with floats, but if you are only expecting integers you can use.

>>> a, l = '((1,2), (3,4), (-5,-6),(12,-13), (a,b), (0.1,0.2))', []
>>> for c in a.split(','):
... 	try: l.append(int(c.replace('(','').replace(')','')))
... 	except: pass
...
>>> tuple(l)
(1, 2, 3, 4, -5, -6, 12, -13)
>>>

HTH :)


From danielkleinad at gmail.com  Wed Nov 29 11:37:23 2006
From: danielkleinad at gmail.com (Daniel Klein)
Date: Wed, 29 Nov 2006 16:37:23 GMT
Subject: How to detect what type a variable is?
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
	<1164817535.636391.294310@n67g2000cwd.googlegroups.com>
Message-ID: <oidrm2t9eohc5st0b54minp3v2jr9dff58@4ax.com>

On 29 Nov 2006 08:25:35 -0800, "Leandro Ardissone"
<lardissone at gmail.com> wrote:

>great, thanks
>
>And how I can compare this "<type 'str'>" output ?
>I want to decide what to do if the var is an string and what to do if
>not..
>
>Tried with:
>if type(artistList) == "<type 'list'>":
>
>and
>if type(artistList) == "list":
>
>but nothing..

Try it this way...

>>> artistList = []
>>> isinstance(artistList, list)
True
>>> if isinstance(artistList, list):
	print "I'm a list."

I'm a list.
>>> 


Daniel Klein


From Roberto.Bonvallet at cern.ch  Wed Nov 29 10:14:47 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 29 Nov 2006 15:14:47 +0000 (UTC)
Subject: Calling functions with dynamic arguments
References: <1164812985.794957.26530@l12g2000cwl.googlegroups.com>
Message-ID: <ekk857$4lo$1@cernne03.cern.ch>

SeanDavis12 wrote:
> I have a dictionary like:
> 
> {"a":1, "b":2}
> 
> and I want to call a function:
> 
> def func1(a=3,b=4):
>    print a,b
> 
> so that I get a=1,b=2, how can I go about that?  

func1(**yourdict)

-- 
Roberto Bonvallet


From rrr at ronadam.com  Sat Nov 11 02:13:03 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 11 Nov 2006 01:13:03 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net>	<4rk5giFrerjfU1@mid.individual.net>
	<pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>
Message-ID: <ej3td1$nr1$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 10 Nov 2006 21:24:50 +0100, Bjoern Schliessmann wrote:
> 
>> Marc 'BlackJack' Rintsch wrote:
>>
>>> No it doesn't -- look again at the example given above.  It's
>>> legal syntax in Python but doesn't have the semantics implied by
>>> the example.
>> Sorry, I don't understand -- what is the difference between the
>> example as it is and the implied semantics of it?
> 
> Inform 6 "x == blue or red or yellow" is equivalent to the Python
>  
> x == blue or x == red or x == yellow

Maybe it should have been expressed as:

     x == (blue or red or yellow)


Cheers,
    Ron



From joseph.sheedy at gmail.com  Mon Nov 13 14:29:21 2006
From: joseph.sheedy at gmail.com (velotron)
Date: 13 Nov 2006 11:29:21 -0800
Subject: Python memory usage
In-Reply-To: <1163104700.515953.4210@b28g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>
	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>
Message-ID: <1163446161.594913.269050@b28g2000cwb.googlegroups.com>

(hello group)

On Nov 9, 8:38 pm, "Klaas" <mike.kl... at gmail.com> wrote:

> I was referring specifically to abominations like range(1000000)

However, there are plenty of valid reasons to allocate huge lists of
integers.   This issue has been worked on:
http://evanjones.ca/python-memory.html
http://evanjones.ca/python-memory-part3.html

My understanding is that the patch allows most objects to be released
back to the OS, but can't help the problem for integers.  I could be
mistaken.  But on a clean Python 2.5:

x=range(10000000)
x=None

The problem exists for floats too, so for a less contrived example:

x=[random.weibullvariate(7.0,2.0) for i in xrange(10000000)]
x=None

Both leave the Python process bloated in my environment.   Is this
problem a good candidate for the FAQ?

 --Joseph



From jkn_gg at nicorp.f9.co.uk  Mon Nov 20 10:38:15 2006
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 20 Nov 2006 07:38:15 -0800
Subject: Misleading IOerror when opening a non-existent file for append?
Message-ID: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>

Hi all

Python 2.4.2 (#1, Apr 26 2006, 23:35:31)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on
linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> ifile=open("\\no_such_dir\\no_such_file" ,'a')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: invalid mode: a
>>>

but:

>>> ifile=open("\\no_such_dir\\no_such_file" ,'r')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: [Errno 2] No such file or directory:
'\\no_such_dir\\no_such_file'
>>>

This 'invalid mode: a' error message seems weird to me. Is this a bug
or am I missimg something?

    Thanks
    Jon N



From dlenski at gmail.com  Mon Nov 13 13:05:04 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 13 Nov 2006 10:05:04 -0800
Subject: Singleton Class Exception
In-Reply-To: <1163437486.036537.270190@h54g2000cwb.googlegroups.com>
References: <1163437486.036537.270190@h54g2000cwb.googlegroups.com>
Message-ID: <1163441104.781863.57590@i42g2000cwa.googlegroups.com>

dischdennis wrote:
> the line "raise Singleton.__single" invokes in my class the following
> error:
>
> exceptions must be classes, instances, or strings (deprecated), not
> PurchaseRequisitionController

Denis,
Jason's explanation is correct!  You are trying to use the Singleton
instance as the exception, which is not only confusing but illegal.
The argument of raise should be an instance of a class derived from
Exception.  You should define some kind of informative Exception class,
e.g.:

class SingletonException(Exception):
    pass

class Singleton:
    __single = None
    def __init__( self ):
        if Singleton.__single:
            raise SingletonException()
        Singleton.__single = self

foo = Singleton()    # works
bar = Singleton()    # raises SingletonException

Dan



From fredrik at pythonware.com  Sun Nov 26 06:22:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 12:22:43 +0100
Subject: who is maintainer of xml-rpc module?
In-Reply-To: <Rk8ah.15023$Sw1.14@newssvr13.news.prodigy.com>
References: <Rk8ah.15023$Sw1.14@newssvr13.news.prodigy.com>
Message-ID: <ekbte3$4pa$1@sea.gmane.org>

Mark Harrison wrote:

> So, I've made a couple of small but useful additions to
> the xml-rpc package.  Is there an assigned maintainer
> of the package I should communicate with?

post your patch here:

http://sourceforge.net/tracker/?group_id=5470&atid=305470

</F>



From setchell.dave at gmail.com  Mon Nov  6 00:03:26 2006
From: setchell.dave at gmail.com (Dave Setchell)
Date: Sun, 05 Nov 2006 23:03:26 -0600
Subject: Awesome Python Information
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
	<DSs3h.5716$lx6.4779@tornado.texas.rr.com>
	<mailman.1790.1162763395.11739.python-list@python.org>
Message-ID: <9IKdnVDSOP6DX9PYnZ2dnUVZ_sqdnZ2d@comcast.com>

On Sun, 05 Nov 2006 17:05:10 -0500, jim-on-linux wrote:

> Thanks for the heads up. I spend enough time with 
> the  email without having to chase gosts.
> 
> jim-on-linux
> http://www.inqvista.com 
> 
> 
> 
> 
> 
> 
> On Sunday 05 November 2006 16:39, Paul McGuire 
> wrote:
>> "Brandon" <Lion623 at mail.com> wrote in message
>> news:1162753631.297470.315570 at m7g2000cwm.google
>>groups.com...
>>
>> > Check out: www.ChezBrandon.com
>>
>> By which he means, "do NOT waste your time
>> checking out this ridiculous website with
>> absolutely no Python whatever anywhere." (This
>> is the idiot who claims he saved the Congress
>> from some Mossad poison gas attack, or
>> whatever.)
>>
>> -- Paul

So I'm using a new fangled newsreader...[pan] and thought i'd test it's
posting and headers on this silly thread...sorry if I wasted anyones time!.


From bj_666 at gmx.net  Sat Nov  4 08:55:27 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 04 Nov 2006 14:55:27 +0100
Subject: py2exe questions
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
	<454BB574.9030607@websafe.com>
	<mailman.1742.1162594159.11739.python-list@python.org>
	<eii0i8$82i$1@news.albasani.net>
	<1162646535.744282.95290@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.11.04.13.55.26.286283@gmx.net>

In <1162646535.744282.95290 at m7g2000cwm.googlegroups.com>, Jerry wrote:

> Despite what everyone is saying though, I believe that any and all
> solutions will require that the byte-code be extracted to some
> directory before being run.

It's not Python bytecode.  The problem is native libraries which are hard
to run from memory without a real file backing it on some platforms.  A
pure Python program/package should be possible without temporary files.

Ciao,
	Marc 'BlackJack' Rintsch


From anthra.norell at vtxmail.ch  Thu Nov  2 09:37:18 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 02 Nov 2006 15:37:18 +0100
Subject: unescape HTML entities
In-Reply-To: <eibfg2$p1c$1@sea.gmane.org>
References: <ei0add$man$1@sea.gmane.org> <45449EAC.4070103@vtxmail.ch>
	<eibfg2$p1c$1@sea.gmane.org>
Message-ID: <454A029E.8060603@vtxmail.ch>

Rares Vernica wrote:
> Hi,
>
> I downloades 2.2 beta, just to be sure I have the same version as you 
> specify. (The file names are no longer funny.) Anyway, it does not seem 
> to do as you said:
>
> In [14]: import SE
>
> In [15]: SE.version
> -------> SE.version()
> Out[15]: 'SE 2.2 beta - SEL 2.2 beta'
>
> In [16]: HTM_Decoder = SE.SE ('HTM2ISO.se')
>
> In [17]: test_string = '''
>     ....: &oslash;=(xf8)   #  248  f8
>     ....: &ugrave;=(xf9)   #  249  f9
>     ....: &uacute;=(xfa)   #  250  fa
>     ....: &ucirc;=(xfb)    #  251  fb
>     ....: &uuml;=(xfc)     #  252  fc
>     ....: &yacute;=(xfd)   #  253  fd
>     ....: &thorn;=(xfe)    #  254  fe
>     ....: &#233;=(xe9)
>     ....: &#234;=(xea)
>     ....: &#235;=(xeb)
>     ....: &#236;=(xec)
>     ....: &#237;=(xed)
>     ....: &#238;=(xee)
>     ....: &#239;=(xef)
>     ....: '''
>
> In [18]: print HTM_Decoder (test_string)
>
> &oslash;=(xf8)   #  248  f8
> &ugrave;=(xf9)   #  249  f9
> &uacute;=(xfa)   #  250  fa
> &ucirc;=(xfb)    #  251  fb
> &uuml;=(xfc)     #  252  fc
> &yacute;=(xfd)   #  253  fd
> &thorn;=(xfe)    #  254  fe
> &#233;=(xe9)
> &#234;=(xea)
> &#235;=(xeb)
> &#236;=(xec)
> &#237;=(xed)
> &#238;=(xee)
> &#239;=(xef)
>
>
> In [19]:
>
> Thanks,
> Ray
>
>
>
> Frederic Rentsch wrote:
>   
>> Rares Vernica wrote:
>>     
>>> Hi,
>>>
>>> How can I unescape HTML entities like "&nbsp;"?
>>>
>>> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
>>> "&lt;", and "&gt;".
>>>
>>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>>> dictionary is the opposite of what I need, it does not have "&nbsp;".
>>>
>>> It has to be in python 2.4.
>>>
>>> Thanks a lot,
>>> Ray
>>>
>>>       
>> One way is this:
>>
>>  >>> import SE                                                      # 
>> Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
>>  >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
>> HTM2ISO.se is included
>> 'output_file_name'
>>
>> For repeated translations the SE object would be assigned to a variable:
>>
>>  >>> HTM_Decoder = SE.SE ('HTM2ISO.se')
>>
>> SE objects take and return strings as well as file names which is useful 
>> for translating string variables, doing line-by-line translations and 
>> for interactive development or verification. A simple way to check a 
>> substitution set is to use its definitions as test data. The following 
>> is a section of the definition file HTM2ISO.se:
>>
>> test_string = '''
>> &oslash;=(xf8)   #  248  f8
>> &ugrave;=(xf9)   #  249  f9
>> &uacute;=(xfa)   #  250  fa
>> &ucirc;=(xfb)    #  251  fb
>> &uuml;=(xfc)     #  252  fc
>> &yacute;=(xfd)   #  253  fd
>> &thorn;=(xfe)    #  254  fe
>> &#233;=(xe9)
>> &#234;=(xea)
>> &#235;=(xeb)
>> &#236;=(xec)
>> &#237;=(xed)
>> &#238;=(xee)
>> &#239;=(xef)
>> '''
>>
>>  >>> print HTM_Decoder (test_string)
>>
>> ?=(xf8)   #  248  f8
>> ?=(xf9)   #  249  f9
>> ?=(xfa)   #  250  fa
>> ?=(xfb)    #  251  fb
>> ?=(xfc)     #  252  fc
>> ?=(xfd)   #  253  fd
>> ?=(xfe)    #  254  fe
>> ?=(xe9)
>> ?=(xea)
>> ?=(xeb)
>> ?=(xec)
>> ?=(xed)
>> ?=(xee)
>> ?=(xef)
>>
>> Another feature of SE is modularity.
>>
>>  >>> strip_tags = '''
>>    ~<(.|\x0a)*?>~=(9)               # one tag to one tab
>>    ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
>> |                                   # run
>>    "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
>>    ~\t+~=(32)                       # one or more tabs to one space
>>    ~\x20\t+~=(32)                   # one space and one or more tabs to 
>> one space
>>    ~\t+\x20~=(32)                   # one or more tab and one space to 
>> one space
>> '''
>>
>>  >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
>> Order doesn't matter
>>
>> If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
>> together with HTM2ISO.se:
>>
>>  >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
>> Order doesn't matter
>>
>> Or, if you have two SE objects, one for stripping tags and one for 
>> decoding the ampersands, you can nest them like this:
>>
>>  >>> test_string = "<p class=MsoNormal 
>> style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
>> para&icirc;t plus &acirc;g&eacute;. </p>"
>>
>>  >>> print Tag_Stripper (HTM_Decoder (test_string))
>>   Ren? est un gar?on qui para?t plus ?g?.
>>
>> Nesting works with file names too, because file names are returned:
>>
>>  >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
>> 'output_file_name'
>>
>>
>> Frederic
>>
>>
>>
>>     
>
>   


Ray,

I am sorry you're having a problem. I cannot duplicate it. It works fine 
here. I suspect that SE.SE doesn't find your file HTM2ISO.SE. Do this:

 >>> HTM_Decoder = SE.SE ('HTM2ISO.SE')
 >>> HTM_Decoder.show_log ()

Thu Nov 02 15:15:39 2006 - Compiler - Ignoring single word 'HTM2ISO.SE'. 
Not an existing file 'HTM2ISO.SE'.

If you see this, then you might have forgotten to include the path with 
the file name.

Rather than getting an old version, you could just have renamed the to 
py-files. Version 2.3 has some minor bugs corrected. I fixed the names 
and tried to re-upload to the Cheese Shop and the damn thing stubbornly 
refuses the upload after having required that I delete the file I was 
going to replacing. So it isn't there anymore and the replacement isn't 
there yet. I'll be working on this. In the meantime I'll be happy to 
direct-mail V2.3 by request.

Frederic





From pavlovevidence at gmail.com  Mon Nov 13 06:38:29 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Nov 2006 03:38:29 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<mailman.38.1163402844.32031.python-list@python.org>
	<1163408380.747399.18750@h54g2000cwb.googlegroups.com>
Message-ID: <1163417909.768399.199650@h54g2000cwb.googlegroups.com>

George Sakkis wrote:
> Fredrik Lundh wrote:
>
> > George Sakkis wrote:
> >
> > > The base object class would be one candidate, similarly to the way
> > > __nonzero__ is defined to use __len__, or __contains__ to use __iter__.
> > >
> > > Alternatively, iter() could be a wrapper type (or perhaps mixin)
> > > instead of a function, something like:
> >
> > so you're proposing to either make *all* objects respond to "+", or
> > introduce limited *iterator* algebra.
>
> If by 'respond to "+"' is implied that you can get a "TypeError:
> iterable argument required", as you get now for attempting "x in y" for
> non-iterable y, why not ?

Bad idea on many, many levels.  Don't go there.


> Although I like the iterator algebra idea
> better.
>
> > not sure how that matches the OP's wish for "mostly backwards
> > compatible" support for *iterable* algebra, really...
>
> Given the subject of the thread, backwards compatibility is not the
> main prerequisite. Besides, it's an *extension* idea; allow operations
> that were not allowed before, not the other way around or modifying
> existing semantics.

You missed the important word (in spite of Fredrick's emphasis):
iterable.  Your iter class solution only works for *iterators* (and not
even all iterators); the OP wanted it to work for any *iterable*.

"Iterator" and "iterable" are protocols.  The only way to implement
what the OP wanted is to change iterable protocol, which means changing
the documentation to say that iterable objects must implement __add__
and that it must chain the iterables, and updating all iterable types
to do this.  Besides the large amount of work that this will need,
there are other problems.

1. It increases the burden on third party iterable developers.
Protocols should be kept as simple as possible for this reason.
2. Many iterable types already implement __add__ (list, tuple, string),
so this new requirement would complicate these guys a lot.

> Of course, programs that attempt forbidden
> expressions on purpose so that they can catch and handle the exception
> would break when suddenly no exception is raised, but I doubt there are
> many of those...

3. While not breaking backwards compatibility in the strictest sense,
the adverse effect on incorrect code shouldn't be brushed aside.  It
would be a bad thing if this incorrect code:

a = ["hello"]
b = "world"
a+b

suddenly started failing silently instead of raising an exception.


Carl Banks



From ytlim1 at gmail.com  Fri Nov 17 07:15:33 2006
From: ytlim1 at gmail.com (Why Tea)
Date: 17 Nov 2006 04:15:33 -0800
Subject: What python modules are available?
Message-ID: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>

How do I find out what python modules are installed on a Solaris
platform?

I tried to import numarray, but python couldn't find it.

/Why Tea



From shane at hathawaymix.org  Fri Nov 24 04:10:29 2006
From: shane at hathawaymix.org (Shane Hathaway)
Date: Fri, 24 Nov 2006 02:10:29 -0700
Subject: The Python Papers Edition One
In-Reply-To: <1164340388.885058.264750@l12g2000cwl.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<7xodqyn5kd.fsf@ruckus.brouhaha.com>	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
Message-ID: <4566B705.20102@hathawaymix.org>

tleeuwenburg at gmail.com wrote:
> Ben Finney wrote:
>> "tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
>>
>>> Yes, it's true that you can't resell copies of The Python Papers for
>>> personal profits, but you may derive from it, reproduce and
>>> propagate it. You're quite right to point it out.
>> Then please revise the false statement that the publication is "free
>> as in beer and freedom", or make it true by releasing the documents
>> under a license that does grant conventional free-software freedoms.
>>
>> --
>>  \       "They can not take away our self respect if we do not give it |
>>   `\                                      to them."  -- Mahatma Gandhi |
>> _o__)                                                                  |
>> Ben Finney
> 
> I thought I just had. In what way does the statement "Yes, it's true
> that you can't resell copies of The Python Papers for personal profits,
> but you may derive from it, reproduce and propagate it" not provide
> such a revision and clarification? Seriously, let me know what exact
> statement you feel needs to be made, and I will endorse it accordingly
> if it is accurate.

The phrase "free as in freedom" is commonly understood differently from
the way you are using it.  Free as in freedom usually grants the right
to distribute for a fee.  Many Linux distributors depend on that right;
otherwise they wouldn't have the right to sell CDs.

IMHO your licensing terms are fine; you don't need to switch from the CC
license.  Just avoid the term "free as in freedom", since the Free
Software Foundation has assigned that phrase a very specific meaning.

Shane



From Jeff.Demel at JavelinDirect.com  Thu Nov 16 13:42:07 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 16 Nov 2006 12:42:07 -0600
Subject: Python v PHP: fair comparison?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFDD@DMSP-MSG-EVS01.mail.pvt>

> Walterbyrd wrote:
>> Okay, where can I get Python and Apache 2.X for $10 a year?

> I replied:
> Webfaction.com

Tkc then came back with:
>Um, I think you're off by an order of magnitude.  Walterbyrd asked 
> about $10/*year* and webfaction.com charges $7.50/*month*. 
>Well, I suppose if one only needed one and a third months of 
>hosting during the course of the year, it might do for ya. ;-)

Yup, I read month, not year.  My bad.

What kind of hosting does one get for $10 a *year*?  And I'm not just
talking Python here, but any hosting at all.  That seems like an absurd
price requirement to me.  I was stoked to find
Python/Apache2.0/Django/IMAP Email/2GB storage for about 10 or so bucks
a *month*.

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From shejo284 at gmail.com  Fri Nov 17 02:51:48 2006
From: shejo284 at gmail.com (Sheldon)
Date: 16 Nov 2006 23:51:48 -0800
Subject: C extensions and memory leakage
Message-ID: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>

Hi,

I have a program that I have extended with a C function. When the
program is run once or twice everything is ok but in a loop of 5 to 12
iterations, the memory runs out and the program crashes.
Now I have gone through this program thoroughly to check if all arrays
have been deallocated prior to exiting and they have, but still the
problem exists.

Now I am wondering if the problem is in Python and the wrapper? Does
anybody have any idea or experience with this? I am running on
Mandrake10 using python 2.3. I am not exactly sure which C wrapper I am
using as I have copied it from another person.

thanks in advance,
/Sheldon



From theller at ctypes.org  Fri Nov 10 15:11:26 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 10 Nov 2006 21:11:26 +0100
Subject: announce: FAQs suggested
In-Reply-To: <1163168871.092708.83150@f16g2000cwb.googlegroups.com>
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>	<ej20b4$rjj$02$1@news.t-online.com>	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>
	<1163168871.092708.83150@f16g2000cwb.googlegroups.com>
Message-ID: <4554DCEE.5080301@ctypes.org>

p.lavarre at ieee.org schrieb:
>> > > > http://effbot.org/pyfaq/suggest.htm
>> > > FAQ: How do I say returns void in ctypes?
>> > That's in the ctypes documentation, where it belongs.
>>
>> Thank you, before I never had found "Use None for void a function not
>> returning anything" at:
>> http://starship.python.net/crew/theller/ctypes/reference.html

This sentence:
  Use None for void a function not returning anything
of course makes no sense.

What I had in mind was:

  Use None for a void function not returning anything

but that can certainly improved.  Suggestions?


Thomas



From mike.klaas at gmail.com  Mon Nov 20 17:28:23 2006
From: mike.klaas at gmail.com (Klaas)
Date: 20 Nov 2006 14:28:23 -0800
Subject: IronPython Community Edition r4
In-Reply-To: <mailman.502.1164021995.32031.python-list@python.org>
References: <mailman.502.1164021995.32031.python-list@python.org>
Message-ID: <1164061703.755033.306570@k70g2000cwa.googlegroups.com>

Sanghyeon Seo wrote:
> _sre.py from PyPy, a pure Python implementation of Python's regular
> expression, is included and enabled by default, overriding
> IronPython's implementation based on System.Text.RegularExpression.
> You can comment out "install_sre_py()" line from site.py to disable
> this.

Interesting--how does this fare, performance-wise?

-Mike



From no-spam at no-spam-no-spam.invalid  Fri Nov  3 12:13:51 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 18:13:51 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eifmgv$r37$1@news.sap-ag.de>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net> <eifmgv$r37$1@news.sap-ag.de>
Message-ID: <eiftcg$968$1@news.albasani.net>

Daniel Dittmar wrote:
> robert wrote:
>> ---- Question Besides:  do concurrent INC/DEC machine OP-commands 
>> execute atomically on Multi-Cores as they do in Single-Core threads?
> 
> No on the level that that Python reference counting is implemented. The 
> CPUs have often special assembler ops for these operations. I think that 
> it's even more complicated as some machines require additional read and 
> write barriers around these operations.
> 
>>> Take a look at IPython1 and it's parallel computing capabilities [1,
> [...]
>> I do selected things with interprocess shared memory techniques 
>> already. Thats medium efficent.
>> Multiple interpreters inside one process seem to be most promising for 
>> seemless multi-core programming. 
> 
> Both IPython and Jython use multiple CPUs without the GIL, so you don't 
> need to add the complication of multiple interpreters.

(IPython is only a special "python network terminal" as already said.)

With Jython I'm not familiar. Yet I think going to Jython will first cost more performance than you can win - at least on only dual cores as we have now. In 5 years with > 8x MPU systems this may be different ... 
Does Jython really eliminate the GIL? What happens when different threads alter/read a dict concurrently - the basic operation in python, which is usually not protected by locks. Does Jython use a dict data type (and other collection types) which lock during _each_ access? in case - that may be very expensive.

>  > As all Python objects share the same
>  > malloc space - thats the key requirement in order to get the main
>  > effect. As soon as with have object pickling in between its well away
>  > from this very discussion.
> 
> There's the complication that CPython has garbage collection in addition 
> to reference counting. I'm not sure what happens when the garbage 
> collector looks at objects rooted in another interpreter.

garbage is collected earliest, when the refcount went to 0. If it ever went to 0, no one will ever use such object again. Thus GC should not be different at all.


robert


From sjmachin at lexicon.net  Sun Nov 26 06:07:25 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 03:07:25 -0800
Subject: problem about list indexing
In-Reply-To: <pan.2006.11.26.10.35.39.283675@REMOVE.THIS.cybersource.com.au>
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
	<pan.2006.11.26.10.35.39.283675@REMOVE.THIS.cybersource.com.au>
Message-ID: <1164539245.375487.300190@j44g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> On Sun, 26 Nov 2006 00:25:13 -0800, hollowspook wrote:
>
> > Hi, there
> >
> > a = range(100)
> >
> > if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7],
> > a[11], a[56], a[90]].
> > Is there any other way?
>
> a = [7, 11, 56, 90]
>
> Are those numbers supposed to be in some sort of series? They aren't an
> arithmetic series:
>
> (11 - 7) = 4
> (56 - 11) = 45  # not a constant difference
>
> nor are they a geometric series:
>
> (11/7) = 1.57
> (56/11) = 5.09  # not a constant ratio
>
> They don't look like some form of a Fibonacci series:
>
> 7+11 != 56
> 11+56 != 90
>
> If they're just "random" numbers, plucked out of thin air, then you
> probably can't calculate them and you'll need to just create them in a
> list a = [7, 11, 56, 90].
>

Actually, it's a cubic polynomial ;-)

| >>> def f(x):
| ...     return (
| ...         7
| ...         + 4 * x
| ...         + 41 * x * (x - 1) // 2
| ...         - 52 * x * (x - 1) * (x - 2) // 6
| ...         )
| ...
| >>> [f(x) for x in range(4)]
|  [7, 11, 56, 90]

HTH,
John



From samantha7395 at hotmail.com  Thu Nov 16 18:48:09 2006
From: samantha7395 at hotmail.com (Samantha)
Date: Thu, 16 Nov 2006 15:48:09 -0800
Subject: Writing to Registry
Message-ID: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>

I am working with this recipes:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66011

The problem I am having is setting a hex value.
This line ---   SetValueEx(aKey,"MyNewKey",0, REG_SZ, 
r"c:\winnt\explorer.exe")
I want something Like --   SetValueEx(aKey,"MyNewSize",0, REG_SZ, 120 or 
some value)
Help would be appreciated.
S




From sjmachin at lexicon.net  Fri Nov 24 03:54:35 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 00:54:35 -0800
Subject: Local variables persist in functions?
In-Reply-To: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <1164358475.569240.115450@45g2000cws.googlegroups.com>


120psi at gmail.com wrote:
> I'm a bit baffled.  Here is a bit of fairly straightforward code:
>
> def _chunkify( l, chunkSize, _curList = list() ):

Quite apart from the default argument problem, which Duncan has
addressed, you have some problems with style and variable names. In
particular: give variables meaningful names ; "L".lower() is not
meaningful and also suffers from confusion with the digit 1 in some
fonts. There is no necessity for the _ in _curList in the above line.

Please consider reading http://www.python.org/dev/peps/pep-0008/

>     print _curList   # yay for printf debugging
>     if len( l ) <= chunkSize:
>         _curList.append( l )
>     else:
>         newChunk = l[:chunkSize]
>         _curList.append( newChunk )
>         _chunkify( l[chunkSize:], chunkSize, _curList )
>     return _curList
>
> _chunkify simply breaks a sequence into a sequence of smaller lists of
> size <= chunkSize.  The first call works fine, but if I call it
> multiple times, weirdness happens.
>
> chunks = _chunkify( list, size )   # _curList keeps its previous value!
> chunks = _chunkify( list, size, list() )    # this works as expected

Is the first "list" a list, or is it the name of the same function that
you are calling to provide the 3rd argument?

[snip]

HTH,
John



From maxerickson at gmail.com  Wed Nov  8 19:11:20 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Thu, 9 Nov 2006 00:11:20 +0000 (UTC)
Subject: PIL - Pixel Level Image Manipulation?
References: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>
	<312cfe2b0611081156v619bd82eu782b068bfd2cf558@mail.gmail.com>
Message-ID: <Xns9875C32CBF0D5maxericksongmailcom@80.91.229.5>

"Gregory Pi?ero" <gregpinero at gmail.com> wrote:

> On 11/8/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
>> I want to be able to randomly change pixels in an image and view
>> the results.  I can use whatever format of image makes this
>> easiest, e.g., gray scale, bit tonal, etc.
>>
>> Ideally I'd like to keep the pixels in an intermediate format
>> like a list of (integers?) or an array and convert that to an
>> image as needed.
>>
>> I'm hoping someone has some experience on this and could offer
>> some advice or code.  I thought it would be easy in PIL  but I'm
>> not sure. 
> 
> I did find these functions after more searching:
> http://mail.python.org/pipermail/image-sig/2002-July/001914.html
> 
> Perhaps I'll try those out tonight if I don't hear of anything
> better in the meantime.
> 
> -Greg

Maybe something of use at:

http://online.effbot.org/2005_10_01_archive.htm#20051003


max



From bdesth.quelquechose at free.quelquepart.fr  Thu Nov 23 18:19:33 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 24 Nov 2006 00:19:33 +0100
Subject: Access to variable from external imported module
In-Reply-To: <1164319761.451409.196660@j44g2000cwa.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
Message-ID: <4566275f$0$6178$426a74cc@news.free.fr>

GinTon a ?crit :
> Sorry, I mean access to local variable from a method

One of the most surprising properties of local variables is that they 
are, well... local.



From paul at boddie.org.uk  Fri Nov 24 05:41:47 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Nov 2006 02:41:47 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
	<mailman.669.1164359437.32031.python-list@python.org>
Message-ID: <1164364907.554740.212140@j44g2000cwa.googlegroups.com>

Shane Hathaway wrote:
>
> IMHO your licensing terms are fine; you don't need to switch from the CC
> license.  Just avoid the term "free as in freedom", since the Free
> Software Foundation has assigned that phrase a very specific meaning.

Agreed. It should also be noted that Debian - amongst the strictest
with regard to software and content licensing - do not regard the CC
licences as being "free as in freedom":

http://en.wikipedia.org/wiki/Creative_Commons_licenses
http://people.debian.org/~evan/ccsummary.html
http://people.debian.org/~evan/draftresponse.txt

Consequently, it may be appropriate to remind authors to also make
their works more widely available under a licence that may permit
further distribution, if that is desirable.

Paul

P.S. I still don't really understand why the FSF unreservedly
recommends the Free Art licence when it has a "choice of law" clause
that has prevented things like the GPL-compatibility of other licences
in the past.



From fredrik at pythonware.com  Sun Nov 19 11:22:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 17:22:04 +0100
Subject: A little confuse
In-Reply-To: <1163950602.32026.9.camel@Tiredbones.lan>
References: <1163950602.32026.9.camel@Tiredbones.lan>
Message-ID: <ejq0bc$l5k$1@sea.gmane.org>

infotechsys at pivot.net wrote:

> When I run this code in the pdb it works.
>  accountNbr = 1
>  for testLine in ftest.readlines():
>         acct = testLine[1:2]             #there account number
>         if accountNbr == int(acct):
>             accountNbr = accountNbr + 1
> 
> When I run without the debugger I get this error.
> 
>  File "./casco.py", line 62, in process
>     if accountNbr == int(acct):
> ValueError: invalid literal for int(): "
> 
> Can someone explain?

adding a

          print repr(acct), repr(testLine)

debug statement after the "acct = testLine" line might give you the 
clues you need to solve this.

</F>



From grante at visi.com  Fri Nov 17 10:41:21 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 17 Nov 2006 15:41:21 -0000
Subject: pyserial port connection problem
References: <1163764748.744393.130660@m7g2000cwm.googlegroups.com>
Message-ID: <12lrm118tk0sv69@corp.supernews.com>

On 2006-11-17, Jon <jspeis at gmail.com> wrote:

> I ran py2exe on the program (which uses wxpython for its gui)
> and sent the output from the py2exe to another computer. now
> when I try to run it on this other computer it fails to open
> the port. it gives the error that it cannot createfile. the
> code I'm using to connect is the same as it is when it worked
> on my computer.

Are you sure you're using the correct com port?

> I do notice that pyserial sees this port on the other computer as
> \\\\.\\COM14 - while windows device manager displays it as COM14.

That's just another one of the many fun and wonderful little
bits of brokenness in MS Windows.  COM14 can't be opened using
the name COM14.  You have to call it \\.\COM14.  Using the
unadorned COMx name only works for COM1-COM9.  Since the
dimwits at MS decided to use C's "escape" character as a
directory separator, you've got to double it up (e.g.
"\\\\.\\COM14") to get the string you really want.

> On the other computer the data is properly displayed in
> Hyperterminal when opened on COM14.

What it displays as on other computers is irrelevant.  Just
because a USB serial adapter shows up as COM14 on machine A,
that doesn't mean it's going to be COM14 on machine B.

> how can I resolve this issue?

Go look in the device manager to see what com port you should
be using.

-- 
Grant Edwards                   grante             Yow!  There's a SALE on
                                  at               STRETCH SOCKS down at the
                               visi.com            "7-11"!!


From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 00:49:21 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Nov 2006 16:49:21 +1100
Subject: Physical constants
References: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>
	<mailman.1745.1162607876.11739.python-list@python.org>
Message-ID: <pan.2006.11.04.05.49.21.200199@REMOVE.THIS.cybersource.com.au>

Apologies for breaking threading, but my ISP seems to have eaten the
original post from Tommy. Hence I'm replying to a reply.

Tommy Grav wrote:
> I have some code for doing orbital computations. The code is kind of
> extensive with many classes, each having several functions. In these
> functions I need to use constants (like the gravitational constant). 
> What is the best way of implementing a solution when constants are
> used in several different classes and functions? 

If all your code is in the one file, then it couldn't be simpler. E.g.:


# orbital computations

# define some constants

G = 1.0 # gravity is strong in this universe...

# define some functions

def force_of_gravity(m1, m2, r):
    return G*m1*m2/r**2


-- 
Steven.



From orsenthil at gmail.com  Mon Nov 13 08:35:15 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 05:35:15 -0800
Subject: httplib.InvalidURL: nonnumeric port: For characters in
	theproxypassword in URL
In-Reply-To: <mailman.55.1163423879.32031.python-list@python.org>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<1163423258.919153.281260@b28g2000cwb.googlegroups.com>
	<mailman.55.1163423879.32031.python-list@python.org>
Message-ID: <1163424914.967174.302610@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
> "Phoe6" wrote:
>
> > - use urllib.quote() to covert the proxy url to a quoted one.
>
> you should use quote to convert the *password* to quoted form, not use it on
> the entire URL.
>
Am sorry Fred. The same problem:

  File "C:\Python24\lib\httplib.py", line 598, in _set_hostport
    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
httplib.InvalidURL: nonnumeric port: '|\'

I dont think its an issue to be resolved with quote().

Thanks,
Senthil



From rudy.schockaert at gmail.com  Thu Nov 23 04:52:53 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Thu, 23 Nov 2006 10:52:53 +0100
Subject: Using SimpleXMLRPCServer in a Windows Service
Message-ID: <60987dac0611230152r4af42ce6mfbbaf5a4409537ee@mail.gmail.com>

After some Googling I found a post of someone who wanted to do exactly
as what I want to do now.
There is however a problem in his code that makes the service fails
after the first connection. I slightly modified his code and now I can
run the service longer before I run into trouble.
I then tried making the SimpleXMLRPCServer multi-threaded, hoping the
problem would disappear, but no avail.
The code is as follows:
The commented part in the while loop is from the original code.
<CODE>


## XML-RPC Service
import sys
import win32serviceutil
import win32service
import win32event
import win32evtlogutil
import win32file
import servicemanager
import SimpleXMLRPCServer
import SocketServer
import select

class OBJECT:
    def hello(self, text):
        return "Hello World (%s)" % text

class ThreadedSimpleXMLRPCServer(SocketServer.ThreadingMixIn,
SimpleXMLRPCServer.SimpleXMLRPCServer): pass

class XMLRPCSERVICE(win32serviceutil.ServiceFramework):
    _svc_name_ = "XMLRPCSERVICE"
    _svc_display_name_ = "XMLRPCSERVICE"
    _svc_description_ = "XMLRPCSERVICE"

    def __init__(self, args):
        win32evtlogutil.AddSourceToRegistry(self._svc_display_name_,
sys.executable, "Application")
        win32serviceutil.ServiceFramework.__init__(self, args)

        self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
        self.hSockEvent = win32event.CreateEvent(None, 0, 0, None)
        self.stop_requested = 0

    def SvcStop(self):
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        self.stop_requested = 1
        win32event.SetEvent(self.hWaitStop)

    def SvcDoRun(self):
        ## Write a started event
        servicemanager.LogMsg(
            servicemanager.EVENTLOG_INFORMATION_TYPE,
            servicemanager.PYS_SERVICE_STARTED,
            (self._svc_name_, ' (%s)' % self._svc_name_))

        server = ThreadedSimpleXMLRPCServer(("", 8080))
        object = OBJECT()
        server.register_instance(object)
        self.socket = server.socket

        while 1:
            r, w, x = select.select([self.socket],[],[],10)
            if r == [self.socket]:
                server.handle_request()
            if self.stop_requested:
                self.socket.close()
                break


            #win32file.WSAEventSelect(server,
self.hSockEvent,win32file.FD_ACCEPT)
            #rc =
win32event.WaitForMultipleObjects((self.hWaitStop,self.hSockEvent), 0,
win32event.INFINITE)
            #if rc == win32event.WAIT_OBJECT_0:
            #    break
            #else:
            #    server.handle_request()
            #    win32file.WSAEventSelect(server,self.hSockEvent, 0)
            #    #server.serve_forever()  ## Works, but breaks the

        ## Write a stopped event
        win32evtlogutil.ReportEvent(self._svc_name_,
                                    servicemanager.PYS_SERVICE_STOPPED,0,
                                    servicemanager.EVENTLOG_INFORMATION_TYPE,
                                    (self._svc_name_,""))

if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(XMLRPCSERVICE)


</CODE>

I tested with the following:

<CODE>

import xmlrpclib
import time

server = xmlrpclib.ServerProxy("http://localhost:8080")
for i in range(100):
    print server.hello("%d" % i)
    time.sleep(1)

</CODE>

The loop ends with the following error:

<OUTPUT>
Hello World (0)
...
Hello World (44)
Traceback (most recent call last):
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\DATA\TestSoap.py", line 6, in ?
    print server.hello("%d" % i)
  File "C:\Python24\lib\xmlrpclib.py", line 1096, in __call__
    return self.__send(self.__name, args)
  File "C:\Python24\lib\xmlrpclib.py", line 1383, in __request
    verbose=self.__verbose
  File "C:\Python24\lib\xmlrpclib.py", line 1137, in request
    headers
ProtocolError: <ProtocolError for localhost:8080/RPC2: -1 >
</OUTPUT>

Can someone help me in creating a windows service that allows me to
handle XMLRPC request?

Thanks in advance,

Rudy Schockaert


From fredrik at pythonware.com  Wed Nov 29 17:11:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 23:11:27 +0100
Subject: utf - string translation
In-Reply-To: <1164837136.303079.312060@j44g2000cwa.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>	<mf19h.1992$%_2.1833@newsfe19.lga>	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>	<mailman.832.1164798594.32031.python-list@python.org>	<1164829990.146305.92750@l39g2000cwd.googlegroups.com>	<mailman.850.1164831380.32031.python-list@python.org>
	<1164837136.303079.312060@j44g2000cwa.googlegroups.com>
Message-ID: <ekl0if$qm7$1@sea.gmane.org>

John Machin wrote:

> Another point: there are many non-latin1 characters that could be
> mapped to ASCII. For example:
>     u"\u0141ukasziewicz".translate(unaccented_map())
> doesn't work unless an entry is added to the no-decomposition table:
>     0x0141: u"L", # LATIN CAPITAL LETTER L WITH STROKE
> 
> It looks like generating extra entries like that could be done, with
> the aid of unicodedata.name():
> 
> LATIN CAPITAL LETTER X WITH blahblah -> "X"
> LATIN SMALL LETTER X WITH blahblah -> "X".lower()
> 
> This would require a fair bit of care -- obviously there are special
> cases like LATIN CAPITAL LETTER O WITH STROKE. Eyeballing by regional
> experts is probably required.

see the comments over at

     http://effbot.org/zone/unicode-convert.htm

for an extended table, eyeballed by a regional expert (and since he 
makes the same point about OE vs Oe as you do, I'll probably have to 
change the code ;-)

</F>



From fredrik at pythonware.com  Sun Nov 12 19:41:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 01:41:40 +0100
Subject: format requires a mapping?
In-Reply-To: <1163377959.646963.94900@e3g2000cwe.googlegroups.com>
References: <1163377959.646963.94900@e3g2000cwe.googlegroups.com>
Message-ID: <ej8f01$5bt$1@sea.gmane.org>

ronrsr wrote:

> what is python trying to tell me here?  does it have to do with
> formatting the string.
> 
> Keywords and Zinger are fields in my database.
> 
> print """<tr>
>     <td class="padplace" width="120">Keywords</td>
>     <td class="padplace" idth="660">Zinger</td><td>
> 
> 
> 
> 
> 
> TypeError:  format requires a mapping

portions of your code and the traceback appears to be missing, so it's a 
bit hard to tell what you're really doing here, but that error message 
usually means that you're using the % string formatting operator with 
named placeholders in the string template, but with something that's not 
a dictionary as the data.  an example:

 >>> "%(name)s" % 10
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: format requires a mapping

either switch to positional markers, or put the data in a dictionary (or 
any other object that implements the mapping interface).

</F>



From gagsl-py at yahoo.com.ar  Thu Nov  9 13:45:11 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 15:45:11 -0300
Subject: Lists of lists and tuples, and finding things within them
In-Reply-To: <5f56302b0611091006k6326d724t66b654250a8b77e8@mail.gmail.co
 m>
References: <1163079978.5053.32.camel@pepper>
	<5f56302b0611091006k6326d724t66b654250a8b77e8@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061109153335.04197f90@yahoo.com.ar>

At Thursday 9/11/2006 15:06, Daniel Nogradi wrote:

> > I have a program that keeps some of its data in a list of tuples.
> > Sometimes, I want to be able to find that data out of the list.  Here is
> > the list in question:
> >
> > [('password01', 'unk'), ('host', 'dragonstone.org'), ('port', '1234'),
> > ('character01', 'Thessalus')]
> >
> >
> > for key, value in x:
> >     if key == 'host':
> >         print value
> >
>
>If I were you I would use a dictionary for such a thing:
>
>mydict = dict( password01='unk', host='dragonstone.org', port='1234',
>character01='Thessalus' )
>
>And then you would look up host by:
>
>mydict[ 'host' ]

You can even keep the original tuples, and create a dict when needed 
(if searches like this are seldom used):

print dict(x)['host']
print dict(x).get('host')


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From Tim.Golden at viacom-outdoor.co.uk  Tue Nov 28 05:55:37 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 28 Nov 2006 10:55:37 -0000
Subject: Accessing file metadata on windows XP
In-Reply-To: <xjUah.4143$ql2.1115@newsread3.news.pas.earthlink.net>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B635@vogbs009.gb.vo.local>

[Dennis Lee Bieber]

| > When rightclicking a, for example, pdf file on windows, one normally
| > gets a screen with three or four tags.  Clicking on one of 
| the summary
| > tag one can get some info like "title", "Author", 
| "category", "keyword"
| > etc..
| >
| Doesn't for me... Right-clicking on a PDF gives me a 
| pop-up menu to open,  print, compress to ZIP, send to 
| application in a predefined list, copy/delete/rename, 
| and access properties.

OK, I admit I understood that to mean: rightclicking and
selecting Properties (or getting the Property Sheets any
other way)...

| Unfortunately, you now encounter the difference between Windows
| (right-click/properties/summary) data, and what PDF format itself
| maintains internally 

Very true; there is confusion in this particular case. Not sure
if the OP was simply using a PDF as an example, which could have
been a .txt file for example. Or if he wanted to be specific.
Good point.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
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From george.sakkis at gmail.com  Sun Nov 12 21:34:26 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 12 Nov 2006 18:34:26 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
Message-ID: <1163385266.824914.265490@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:

> John Reese wrote:
>
> > It seems like it would be clear and mostly backwards compatible if the
> > + operator on any iterables created a new iterable that iterated
> > throught first its left operand and then its right, in the style of
> > itertools.chain.
>
> you do know that "iterable" is an informal interface, right?  to what
> class would you add this operation?
>
> </F>

The base object class would be one candidate, similarly to the way
__nonzero__ is defined to use __len__, or __contains__ to use __iter__.

Alternatively, iter() could be a wrapper type (or perhaps mixin)
instead of a function, something like:

from itertools import chain, tee, islice

import __builtin__
_builtin_iter = __builtin__.iter

class iter(object):

    def __init__(self, iterable):
        self._it = _builtin_iter(iterable)

    def __iter__(self):
        return self
    def next(self):
        return self._it.next()

    def __getitem__(self, index):
        if isinstance(index, int):
            try: return islice(self._it, index, index+1).next()
            except StopIteration:
                raise IndexError('Index %d out of range' % index)
        else:
            start,stop,step = index.start, index.stop, index.step
            if start is None: start = 0
            if step is None: step = 1
            return islice(self._it, start, stop, step)

    def __add__(self, other):
        return chain(self._it, other)
    def __radd__(self,other):
        return chain(other, self._it)

    def __mul__(self, num):
        return chain(*tee(self._it,num))

    __rmul__ = __mul__

__builtin__.iter = iter


if __name__ == '__main__':
    def irange(*args):
        return iter(xrange(*args))

    assert list(irange(5)[:3]) == range(5)[:3]
    assert list(irange(5)[3:])  == range(5)[3:]
    assert list(irange(5)[1:3]) == range(5)[1:3]
    assert list(irange(5)[3:1]) == range(5)[3:1]
    assert list(irange(5)[:])   == range(5)[:]
    assert irange(5)[3]         == range(5)[3]

    s = range(5) + range(7,9)
    assert list(irange(5) + irange(7,9)) == s
    assert list(irange(5) +  range(7,9)) == s
    assert list(range(5)  + irange(7,9)) == s

    s = range(5) * 3
    assert list(irange(5) * 3) == s
    assert list(3 * irange(5)) == s


George



From grflanagan at yahoo.co.uk  Fri Nov 24 06:47:58 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 24 Nov 2006 03:47:58 -0800
Subject: Python work in UK
In-Reply-To: <4565f638$0$2447$db0fefd9@news.zen.co.uk>
References: <4565f638$0$2447$db0fefd9@news.zen.co.uk>
Message-ID: <1164368878.498275.303570@45g2000cws.googlegroups.com>


Will McGugan wrote:

> Hi,
>
> I'd love to work in Python, for the sake of my blood pressure, but there
> doesnt seem to be that many jobs that look for Python as the main skill.
> I use Python at work from time to time, and occasionaly get to spend
> several days on a Python project but the majority of the time I use C++.
> How can I make that leap to working with Python? There doesn't seem to
> be many UK positions on the jobs section of Python.org or the usual jobs
> sites. Any recommended jobs sites or tips? (I have googled)
>

Hi Will

I recommend 'cwjobs.co.uk' and 'reed.co.uk'.  I got my current (Python)
contract through MCG recruitment (mcg-recruitment.com), and I've just
accepted a Python/Zope position through  sienared.com - both of these
are in London and came via CWjobs. I don't know about the rest of the
country but there is definitely pure Python work in London if you look
for it.

Good Luck.

Gerard



From DustanGroups at gmail.com  Sat Nov 11 21:25:36 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 18:25:36 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2127.1163297289.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
Message-ID: <1163298336.778941.138540@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> Dustan wrote:
>
> >>>> foo =\
> > [[[1,2,3],[4,5,6],[7,8,9]],
> >  [[3,2,1],[6,5,4],[9,8,7]]]
> >
> > Here, foo appears to be a 3-dimensional list - except it's supposed to
> > be 2-dimensional. The inner-list-of-lists is a result of how I'm
> > producing the data, and now I want to do a mass-concatenation (or
> > extending) of the inner-list-of-lists, and come up with this result:
> >
> >>>> foo == [[1,2,3,4,5,6,7,8,9],[3,2,1,6,5,4,9,8,7]]
> > True
>
> that still doesn't explain your "the expression must be used in a list
> comprehension" requirement, though.

Oh, right; sorry about the confusion. The list isn't quite that simple,
and in order to pull the right pieces together, I use a list
comprehension.

> assuming that the sizes are
> varying, and at least sometimes a lot larger than 3x3, I'd probably
> write the above as
>
>      for index, item in enumerate(foo):
>          this = []
>          for i in item:
>              this.extend(i)
>          foo[index] = this

I'll see if that works.

> which should be pretty efficient, since it avoids unnecessary function
> calls, and is amortized linear time instead of O(N**2).
>
> or, if I was in a hurry, and didn't really care if the inner sequences
> were lists or tuples:
>
> 	foo = map(Tkinter._flatten, foo)
>
> </F>

Steven D'Aprano wrote:
> I don't know if this is the best, but it didn't take long to come up with
> it:
>
> >>> foo = [[[1,2,3],[4,5,6],[7,8,9]],
> ... [[3,2,1],[6,5,4],[9,8,7]]]
> >>>
> >>> def unroll(list3d):
> ...     newl = []
> ...     for sublist in list3d:
> ...             newl.append(sum(sublist, []))
> ...     return newl

deja vu...

> >>> bar = unroll(foo)
> >>> bar
> [[1, 2, 3, 4, 5, 6, 7, 8, 9], [3, 2, 1, 6, 5, 4, 9, 8, 7]]
>
>
> Repeat after me:
>
> "Not everything has to be a one-liner."

Not everything has to be a one-liner. But readability helps.

> If sum() is too slow, because your sub-lists are huge, you can easily
> factor that out and replace it with something using extend.
> 
> 
> -- 
> Steven.



From johnjsal at gmail.com  Thu Nov  2 11:41:47 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 08:41:47 -0800
Subject: creating new objects with references to them
In-Reply-To: <mailman.1669.1162485221.11739.python-list@python.org>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
	<1162482760.424782.244760@h48g2000cwc.googlegroups.com>
	<1162483976.152660.121200@f16g2000cwb.googlegroups.com>
	<mailman.1669.1162485221.11739.python-list@python.org>
Message-ID: <1162485707.730939.98020@i42g2000cwa.googlegroups.com>

Steve Holden wrote:

>      del rec[7]

Hmmm, but what if the record can remain open, changes can be made, and
then saved again to the same object? I suppose it isn't necessary to
delete them, right? Man, this stuff gets complicated....



From martin.dion at gmail.com  Fri Nov  3 16:00:13 2006
From: martin.dion at gmail.com (martdi)
Date: 3 Nov 2006 13:00:13 -0800
Subject: Having trouble with file modes
In-Reply-To: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
References: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
Message-ID: <1162587613.376486.298340@h54g2000cwb.googlegroups.com>


> At first I was convinced that "w+" was the tool for the job.  But now
> I'm finding that the contents of the file are deleted (so I can't read
> the data in).


Possible File Modes:
a : Append -- Add data at the end of the file
r : Read -- Read from the file
w : write -- Flush contents of the file and put data in it
r+ : read and write -- Make changes to the file
any of the above modes with b added at the end of the mode sets the
file in binary mode

you might want to check section 7.2 from
http://docs.python.org/tut/node9.html

Ofen when doing file operations you might prefer to read the file to
modify, make changes in memory then save back in an other file, so you
can make sure the changes are ok before you replace the old one



From ronrsr at gmail.com  Mon Nov 27 14:58:20 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 11:58:20 -0800
Subject: can't get cgi values
In-Reply-To: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
Message-ID: <1164656772.324219.71390@h54g2000cwb.googlegroups.com>

Thank you, all.  that was very helpful, and did solve many of my
problems.  I was addressing the dict with () rather than [].

I'm still having one problem, though -- extracting the keywords. NOw,
if you check the value for Form below, you'll see there is more than
one keyword entry.  When I do:  keywords = form["keywords"] - what sort
of data structure do I get back?

th anks          so much again.

-rsr-


    if form.has_key("keywords"):
         keywords = str(form["keywords"].value)
     else:
          keywords = "k"
     fileHandle.write("here comes keywords:")
     fileHandle.write(str(keywords))

     fileHandle.write("keyword info");
     fileHandle.write(str(form.has_key("keywords")))
     fileHandle.flush()

> here's the info I know:
>
> form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
> MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
> 'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
> April 2002\\r\\n       \\r\\n       \r\n       '),
> MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
> small number of agri-businesses, many of them large corps. Yet these
> subsidies are 6 times what rich countries provide in foreign aid to a
> developing world that includes 5 billion people.\\r\\n       \r\n
> '), MiniFieldStorage('updatebutton', 'Update')])
> form.has_key("citation") = True
> 
>



From craigtw.online at gmail.com  Sun Nov 26 19:38:05 2006
From: craigtw.online at gmail.com (Craig)
Date: 26 Nov 2006 16:38:05 -0800
Subject: Generating header information using ElementTree
In-Reply-To: <1164586070.655741.256800@h54g2000cwb.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
	<4suidqF10rlh1U1@mid.uni-berlin.de>
	<1164583078.233238.227010@45g2000cws.googlegroups.com>
	<1164586070.655741.256800@h54g2000cwb.googlegroups.com>
Message-ID: <1164587885.050983.282680@l39g2000cwd.googlegroups.com>


John Machin wrote:

> Craig wrote:
>
> > Great.  Got that sorted.  The problem I have now is that some of the
> > XML data is not copied across to the file when I have the text
> > information included.  The number of characters that is lost is equal
> > to the number of characters that is in the block of text I entered
> > before.  The code I am using is:
> >
> > def WriteXMLRecord ( record, XMLFileBaseName, root):
> > RecordName = SubElement(root, "Log")
> >     #iterate through all the fields in the record
> >     for key in record:
> >         # write the key and its data
> >         test = SubElement(RecordName, key)
> >         test.text = str(record[key])
> >     tree = ElementTree(root)
> >     tree.write(XMLFileBaseName)
>
> I'm guessing, based on reading the docs for the write method, that you
> should be using the file handle, rather than the file name, if the file
> is already opened. So (1) change the name of the 2nd arg to
> XMLFileHandle or somesuch, and in the caller, use outFile (the handle)
> instead of "record.xml".
>
> >
> > def main():
> >     outFile = open("record.xml", 'w')
> >     outFile.write("""<?xml version=\"1.0\"?>
> > <?xml-stylesheet type=\"text/xsl\" href=\"test.xsl\"?>
> > <!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n\n""")
> >
> >     root = Element("Log")
> >     WriteXMLRecord(data1, "record.xml", root)
> >     WriteXMLRecord(data2, "record.xml", root)
> >     WriteXMLRecord(data3, "record.xml", root)
> >     outFile.close()
> >
> HTH,
> John

Great.  Got it.  Thanks so much for all your help.


Craig



From bj_666 at gmx.net  Wed Nov  8 08:07:07 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 08 Nov 2006 14:07:07 +0100
Subject: please help with optimisation of this code - update of given
	table according to another table
References: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.08.13.07.06.930119@gmx.net>

In <1162981094.820174.65440 at b28g2000cwb.googlegroups.com>, Farraige wrote:

> Let's say we have a table T1:
> 
> A B C D E
> ---------------
> 1 4  5  7 7
> 3 4  0  0 0
> 
> and we call a method mergeTable(T1, T2, [0,1], [2,4])
> 
> It means that we would like to update columns C and E of table T1 with
> data from table T2 but only in case the key columns A and B are equal
> in both tables.... I grant that the given key is unique in both tables
> so if I find a row with the same key in table T2 I do merging, stop and
> go to next row in table T1...
> 
> Let's say T2 looks following:
> 
> A B C D E
> ---------------
> 2 2  8 8 8
> 1 4  9 9 9
> 
> So after execution of our   mergeTable method, the table T1 should look
> like :
> 
> A B C D E
> 1 4  9  7 9
> 3 4  0 0  0
> 
> The 2nd row ['3', '4',  '0' ,'0',  '0'] didn't change because there was
> no row in table T2 with key = 3 ,4
> 
> The main part of my algorithm now looks something like ...
> 
> merge(t1, t2, keyColumns, columnsToBeUpdated)
> 
> .......
> 
>         for row_t1 in t1:
>             for  row_t2 in t2:
>                 if [row_t1[i] for i in keyColumns] == [row_t2[j] for j
> in keyColumns]:
>                     # the keys are the same
>                     for colName in columnsToBeUpdated:
>                         row_t1[colName] = row_t2[colName]
> 
>                     # go outside the inner loop - we found a row with
>                     # the same key in the table
>                     break
> 
> In my algorithm I have 2 for loops and I have no idea how to optimise
> it (maybe with map? )
> I call this method for very large data and the performance is a
> critical issue for me :(

Just go through the first table once and build a mapping key->row and then
go through the second table once and look for each row if the key is in
the mapping.  If yes: update columns.  This runs in O(2*rows) instead if
O(rows**2).

def update_table(table_a, table_b, key_columns, columns_to_be_updated):
    def get_key(row):
        return tuple(row[x] for x in key_columns)
    
    key2row = dict((get_key(row), row) for row in table_a)
    for row in table_b:
        row_to_be_updated = key2row.get(get_key(row))
        if row_to_be_updated is not None:
            for column in columns_to_be_updated:
                row_to_be_updated[column] = row[column]


def main():
    table_a = [[1, 4, 5, 7, 7],
               [3, 4, 0, 0, 0]]
    table_b = [[2, 2, 8, 8, 8],
               [1, 4, 9, 9, 9]]
    update_table(table_a, table_b, (0, 1), (2, 4))
    for row in table_a:
        print row

Ciao,
	Marc 'BlackJack' Rintsch


From fredrik at pythonware.com  Thu Nov 16 08:12:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 14:12:02 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <DC6E4BF7-C3F6-449C-9E2B-0668CE5749A9@snowtide.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<ejhlar$bob$1@sea.gmane.org>
	<DC6E4BF7-C3F6-449C-9E2B-0668CE5749A9@snowtide.com>
Message-ID: <ejho32$lim$1@sea.gmane.org>

Chas Emerick wrote:

> The principle and the practice diverge significantly in our neck of  
> the woods.  The current project involves consuming and making sense  
> of extraordinarily (and typically unnecessarily) complex XHTML.

wasn't your original complaint that ET didn't do the "right thing" when 
you removed elements from a mixed-content tree? (something than can be 
trivially handled with a 2-line helper function)

why mutate the tree if all you want is to extract information from it? 
doesn't sound very efficient to me...

</F>



From Bryce.Bolton at lasp.colorado.edu  Mon Nov 13 16:47:45 2006
From: Bryce.Bolton at lasp.colorado.edu (Bryce Bolton)
Date: Mon, 13 Nov 2006 14:47:45 -0700
Subject: Python app links in windows
In-Reply-To: <4558DBEF.8010409@hobbshouse.org>
Message-ID: <000001c7076d$5de84000$9f0bf70a@lasp.colorado.edu>



I want to click a link, which is assocated with a Python application in
Windows, and have the contents of the link file passed to my program.  How
is this done?

Let's say the link name is:  open_database_viewform_50324.pal     (pal =
python application link)

Inside of open_document_number_50324.pal is the following:

"database_entry" "50324"


So, if I have created a python application and compiled it into EXE, then
associated that viewer app, in windows, with the .PAL extension, it will be
called when I click any .PAL "link file".  

My question is:  How do the contents of the link file get passed to the
python application assocated with .PAL files?  Are the file contents passed
as an ARGV array?  There must be more to this because when I open a file
like some_doc.XLS, the entire contents of that file get passed to Excel, but
I don't know how.

Thanks,
Bryce








From mike.klaas at gmail.com  Fri Nov  3 23:57:21 2006
From: mike.klaas at gmail.com (Klaas)
Date: 3 Nov 2006 20:57:21 -0800
Subject: Defaultdict and speed
In-Reply-To: <1162542563.386682.3090@b28g2000cwb.googlegroups.com>
References: <1162542563.386682.3090@b28g2000cwb.googlegroups.com>
Message-ID: <1162616241.354248.70220@f16g2000cwb.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> This post sums some things I have written in another Python newsgroup.
> More than 40% of the times I use defaultdict like this, to count
> things:
>
> >>> from collections import defaultdict as DD
> >>> s = "abracadabra"
> >>> d = DD(int)
> >>> for c in s: d[c] += 1
> ...
> >>> d
> defaultdict(<type 'int'>, {'a': 5, 'r': 2, 'b': 2, 'c': 1, 'd': 1})
>
> But I have seen that if keys are quite sparse, and int() becomes called
> too much often, then code like this is faster:
>
> >>> d = {}
> >>> for c in s:
> ...   if c in d: d[c] += 1
> ...   else: d[c] = 1
> ...
> >>> d
> {'a': 5, 'r': 2, 'b': 2, 'c': 1, 'd': 1}
>
> So to improve the speed for such special but common situation, the
> defaultdict can manage the case with default_factory=int in a different
> and faster way.

Benchmarks?  I doubt it is worth complicating defaultdict's code (and
slowing down other uses of the class) for this improvement...
especially when the faster alternative is so easy to code.  If that
performance difference matters, you would likely find more fruitful
gains in coding it in c, using PyDict_SET.

-Mike



From gagsl-py at yahoo.com.ar  Mon Nov  6 18:10:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 06 Nov 2006 20:10:56 -0300
Subject: Wait for keyboard input
In-Reply-To: <caa940d20611060458j7c5ae681l83a33c465810b165@mail.gmail.co
 m>
References: <mailman.4743.1162810804.11738.python-list@python.org>
	<caa940d20611060458j7c5ae681l83a33c465810b165@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061106200837.049b27c8@yahoo.com.ar>

At Monday 6/11/2006 09:58, Santosh Chikkerur wrote:

>How to use getchar( ) in python. I want to see the output of the 
>program ,step by step.
>I have given print statements in between for the results..
>Hence i would like to print the output everytime there is 
>getchar().which is the
>similar fn in python

Use raw_input() and press ENTER.

>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of Python-list digest..."

Best if you follow that suggestion...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From deets at nospam.web.de  Tue Nov 21 07:37:11 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Nov 2006 13:37:11 +0100
Subject: Reference class in class creation
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
Message-ID: <4sga7nFsi0j0U1@mid.uni-berlin.de>

Gregor Horvath wrote:

> Hi,
> 
> I want to reference a class itself in its body:
> 
> class SomeElement(object):
> def __init__(self, mycontainer):
> self.mycontainer=mycontainer
> 
> class SomeContainer(object):
> a = SomeElement(SomeContainer)
> 
> 
> Unfortunatly this does not work since the name SomeContainer is not
> definied at class creation time of SomeContainer:
> 
> /tmp/python-9309vMe.py in SomeContainer()
>       4
>       5 class SomeContainer(object):
> ----> 6       a = SomeElement(SomeContainer)
>       7
>       8
> 
> NameError: name 'SomeContainer' is not defined
> 
> 
> How to do this?

Anything wrong with:

class Foo(object):
   pass

Foo.a = Foo

?

Diez



From onurb at xiludom.gro  Wed Nov 15 10:59:25 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 15 Nov 2006 16:59:25 +0100
Subject: Is python for me?
In-Reply-To: <1163530584.269684.214520@h48g2000cwc.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
	<1163530584.269684.214520@h48g2000cwc.googlegroups.com>
Message-ID: <455b395e$0$3184$426a34cc@news.free.fr>

dakman at gmail.com wrote:
> By large I mean an application with intensive operations, such as a
> fancy GUI maybe a couple of threads, accessing a database, etc.
> 

Threads are handled by the OS. GUI are (usually) handled by a
lower-level lib like GTK or such. DB access mostly rely on the
particular RDBMS. So we're left with the application code itself - the
glue between all these componants. There's usually nothing really
"intensive" here, and I wouldn't bet using C++ instead of Python would
make a huge difference here - wrt/ perceived performances at least.

My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From sjmachin at lexicon.net  Wed Nov 15 21:30:30 2006
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 16 Nov 2006 13:30:30 +1100
Subject: Decimal() instead of float?
In-Reply-To: <mailman.210.1163627907.32031.python-list@python.org>
References: <1163294604.4675.4.camel@pepper><mailman.2125.1163295096.11739.python-list@python.org><pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au><1163322853.760315.51040@k70g2000cwa.googlegroups.com>	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
	<mailman.210.1163627907.32031.python-list@python.org>
Message-ID: <455bcd54$1@news.eftel.com>

On 16/11/2006 8:57 AM, Terry Reedy wrote:
> "John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
> news:455b82a0$0$7054$c3e8da3 at news.astraweb.com...
>> John Machin wrote:
>>
>>> Here in Austraila, (I expect this is common to most countries), there
>>> are people who are utterly clueless about elementary data model rules,
>>> like identification "numbers" should be kept as strings.
>> Do you mean that ID numbers that serve as a primary key in a database
>> should also be strings?
> 
> If you mean user-entered data like social security, phone, account, part, 
> or postal code 'numbers' -- as opposed to internal db-generated numbers 
> that the user never sees -- this I would presume 'yes'.
> 
> tjr

Clarification:

A db-generated number like ROWID etc should be whatever the db makes it.

An identification "number" like social security number etc should be a 
string, irrespective of (a) whether the user entered it or a script 
entered it and (b) whether it's a primary key, foreign key or no key at all.

Some "numbers" contain characters outside [0-9]: e.g. ISBN (base 11, "X" 
means 10); Hong Kong ID card "number" (base 36 in some positions).

Even if all bytes are in [0-9], a simple rule should be applied: Does it 
make sense to add or subtract such "numbers"? The answer with (SSN, 
phone number, account number, postal code) is no, so don't store it as a 
numeric type.

Cheers,
John


From fredrik at pythonware.com  Sun Nov 26 14:06:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 20:06:31 +0100
Subject: acessing to the raw data of an email message
In-Reply-To: <20061126193456.2bb5d97a@autremonde>
References: <20061126193456.2bb5d97a@autremonde>
Message-ID: <ekcojn$ga8$1@sea.gmane.org>

Jiba wrote:

> Does anyone have an idea ? I think it would be nice to let the
 > parser add the raw message data in the Message object.

since you're the one passing the raw data to the email parser, maybe you 
could store it somewhere yourself?

</F>



From onurb at xiludom.gro  Thu Nov  9 05:50:42 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 09 Nov 2006 11:50:42 +0100
Subject: substring search without using built in utils
In-Reply-To: <mailman.1954.1163038984.11739.python-list@python.org>
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
	<mailman.1954.1163038984.11739.python-list@python.org>
Message-ID: <45530805$0$10013$426a74cc@news.free.fr>

Gabriel Genellina wrote:
> At Wednesday 8/11/2006 22:29, zeal elite wrote:
> 
>> I am looking for substring search python program without using the
>> built in funtions like find, or 'in'.
> 
> The only reasonable usage for such a constraint would be a school
> assignment so: don't cheat and do your homework!
> 

OTHO, looking for existing solutions to a same or similar problem and
studying them is usually considerer good practice in real-life
programming jobs !-)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jeffrey.aylesworth at gmail.com  Fri Nov 24 11:42:02 2006
From: jeffrey.aylesworth at gmail.com (jeff)
Date: 24 Nov 2006 08:42:02 -0800
Subject: reading id3 tags with python
In-Reply-To: <1164354948.000349.52170@m7g2000cwm.googlegroups.com>
References: <1164328566.089711.89870@l12g2000cwl.googlegroups.com>
	<o9s9h.2927$tM1.1672@newsread1.news.pas.earthlink.net>
	<1164354948.000349.52170@m7g2000cwm.googlegroups.com>
Message-ID: <1164386522.229372.116120@l12g2000cwl.googlegroups.com>

well, heres the error::
######
Traceback (most recent call last):
  File "./main.py", line 28, in ?
    info = id3.Reader(file)
  File "/home/jeffrey/Documents/Music/.rename/id3reader.py", line 187,
in __init__
    self._readId3()
  File "/home/jeffrey/Documents/Music/.rename/id3reader.py", line 306,
in _readId3
    self._interpretFlags()
  File "/home/jeffrey/Documents/Music/.rename/id3reader.py", line 341,
in _interpretFlags
    self._readExtHeader = _readExtHeader_rev3
NameError: global name '_readExtHeader_rev3' is not defined
####
also, i didnt account for Y/N/Yes/No, whatever because this script is
just for myself (also why i didnt use that function to join pathnames,
i oonly realy use linux anymore)

and what do you mean by 'id3reader' cant do directories? my for loop
just does each file in the dirextory



From tleeuwenburg at gmail.com  Tue Nov 28 22:50:51 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 28 Nov 2006 19:50:51 -0800
Subject: 6 Pick Bet Grouping
In-Reply-To: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
Message-ID: <1164772251.325678.45990@l39g2000cwd.googlegroups.com>


bullockbefriending bard wrote:
> (I apologise in advance for posting something slightly OT, but plead in
> mitigation that I'm trying to re-write an old, suboptimal VB6 (erk)
> brute-force attack in a shiny, elegant, pythonic manner. I would really
> appreciate some ideas about an appropriate algorithmic approach to this
> + pointers to any relevant implementations in Python. Along the way,
> I'm also trying to get Python into my organisation through the back
> door - so a further plea for tolerance in posting this here! :))
>
> A single 6 Pick bet looks like this:
> RACE1    RACE2    RACE3    RACE4    RACE5   RACE6
> runner1 / runner 2 / runner 3 / runner4 / runner5 / runner6  - $amount
>
> e.g. we might have:
>
> 5 / 3 / 11 / 7 / 1 / 9  - $50  (5 to come 1st or 2nd in Race1, 3 to
> come first or 2nd in Race 2, etc.)
> 7 / 3 / 11 / 7 / 1 / 9  - $50
> 5 / 3 / 11 / 14 / 1 / 9  - $50
> 7 / 3 / 11 / 14 / 1 / 9  - $50
>
> The totalizator system allows us to merge or group these four bets as
> follows:
>
> 5 + 7 / 3 / 11 / 7 + 14 / 1 / 9 - $50  ($200 total)
>
> This method of expressing multiple bets in one line is advantageous
> because we may have many thousands of combinations we wish to bet and
> only a limited amount of time in which to bet them.
>
> There are up to 14 horses in each race, so 7,529,536 possible 6 Pick
> bets. In practice, one might wish to bet (say)15,000 combinations out
> of these 7.5 million. However, it would be very nice to be able to
> *optimally* merge (as shown above) these 15,000 combinations so that
> they might fit on (say)  2,000 betting tickets instead of trying to
> write out 15,000 single tickets.
>
> To keep things simple, let's assume that all single bets are for the
> same amount. (In practice, however, this is not so.)
>
> Now, it's certainly possible to go about this via brute force
> iteration, but I would really appreciate it if anyone with a CS
> background could point me toward a smarter plan of attack. I have
> perused Skiena's Algorithm Handbook and various websites and can't seem
> to find an analogous problem. I'm hoping this is just my ignorance and
> that my brief exposition rings a bell for someone here.

I don't understand exactly. Why not merge all your bets into a single
line? What constraints exist on how many bets you can put onto one
ticket?

Do you meant you have some bag full of incoming bets, which you are
re-lodging after some merging process? Does this mean you will have one
ticket for each amount?

Cheers,
-T



From mike at mikeash.com  Wed Nov  8 22:17:27 2006
From: mike at mikeash.com (Michael Ash)
Date: Wed, 08 Nov 2006 21:17:27 -0600
Subject: Using Python from Cocoa App via PyObjc - numbers dont match...
References: <1163035378.654266.287360@m73g2000cwd.googlegroups.com>
Message-ID: <1163042247.489957@nfs-db1.segnet.com>

In comp.lang.objective-c sapsi <saptarshi.guha at gmail.com> wrote:
> The first output in the console is 40.4 and the second
> -40.40000152587891.
> 
> If i change the NSLog(s)  to "%f",[n floatValue] (and the second
> likewise) the first is 40.400002 and the second is -40.400002.

I assume you are complaining about the fact that it's not printing exactly 
40.4, and wondering where the error is coming from. (It helps if you 
actually state this yourself, so we don't have to assume it, rather than 
just laying out the circumstances.)

The answer is that floating point numbers are inherently imprecise. Read 
through this essential resource:

http://docs.sun.com/source/806-3568/ncg_goldberg.html

-- 
Michael Ash
Rogue Amoeba Software


From markscottwright at gmail.com  Thu Nov 23 06:32:45 2006
From: markscottwright at gmail.com (markscottwright)
Date: 23 Nov 2006 03:32:45 -0800
Subject: Abelson and Python
In-Reply-To: <mailman.625.1164269712.32031.python-list@python.org>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
	<mailman.625.1164269712.32031.python-list@python.org>
Message-ID: <1164281565.180846.232360@k70g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> markscottwright wrote:
>
>  > If it were that easy, the PyPy guys would be done by now.
>
> if the PyPy guys had focused on writing a Python interpreter in Python,
> they'd been done by now.
>
> </F>

Isn't that the point of PyPy?  It's what their mission statement says
(http://codespeak.net/pypy/dist/pypy/doc/architecture.html#mission-statement):

"PyPy is an implementation of the Python programming language written
in Python itself, flexible and easy to experiment with."

This is something that is amazingly easy to do in scheme, since the
language is so simple, but is typically pretty difficult to do in other
languages.  I remember being blown away by how much I knew after
reaching the end of SICP - I wanted to go out and write my own scheme
compiler (and given the proliferation of scheme implementations, a lot
of other people must have felt the same way).  I don't remember getting
to the end of a book on python and thinking, "that's easy.  I could do
that!"

That said, I see now that the course we're talking about isn't the same
as the old 6.001 course, and presumably has different pedagogical goals.



From theller at ctypes.org  Fri Nov  3 17:48:17 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 03 Nov 2006 23:48:17 +0100
Subject: py2exe questions
In-Reply-To: <454BB574.9030607@websafe.com>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
	<454BB574.9030607@websafe.com>
Message-ID: <454BC731.3000805@ctypes.org>

Larry Bates schrieb:
> Doug Stell wrote:
>> I have 2 questions about py2exe or any similar utility.
>> 
>> 1. Is it possible to create a single Windows executable that does not
>> blow out to a folder full of files and can be called from scripts
>> using command line arguments?
>> 
>> 2. If the above can be done, it is possible to hide parts of the
>> Python source code from users? These users are software developers,
>> but we don't want them to see how the code does what it does.
>> 
>> thanks, doug
> 
> py2exe reduce the number of files you need to distribute down to 4:
> 
> msvcr71.dll
> w9xpopen.exe  (Windows/98 support)
> library.zip (all .pyo, .pyd, and .dll files)
> applcation.exe

It can easily be reduced to 2 files by 'embedding' the libray.zip
into the exe (use the zipfile=None option), and deleting the w9xpopen.exe
if you don't need win98 support.

> I does not however go to great lengths to "hide" the code from
> someone with time/expertise that wants to get to your code
> (but then just about anything can be disassembled).  The compiled
> .pyo files are just placed in library.zip.  At least it doesn't
> send your .py files along.

Thomas



From steve at holdenweb.com  Wed Nov  8 14:02:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 13:02:16 -0600
Subject: Exception Handling in TCPServer (was; Problem exiting application
	in Windows Console.)
In-Reply-To: <1163007018.221972.93580@b28g2000cwb.googlegroups.com>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>	<1163001245.707034.310900@f16g2000cwb.googlegroups.com>
	<1163007018.221972.93580@b28g2000cwb.googlegroups.com>
Message-ID: <eit9hf$tsg$1@sea.gmane.org>

Ant wrote:
> Ant wrote:
> ....
>> OK, I've narrowed the problem back to the way HTTPServer (actually its
>> TCPServer parent) handles exceptions thrown by the process_request
>> method by catching them all, and then calling a handle_error method.
>> There doesn't seem to be a way of getting at the exception thrown
>> however - does anyone know how I can get this information?
> 
> Hmm. Lonely topic ;-)
> 
> I've found a way to solve the problem, by creating a subclass of
> HTTPServer which overrides the handle_error method:
> 
> class HelpServer(HTTPServer):
>     def handle_error(self, request, client_address):
>         exception_line = inspect.trace()[-1][-2][0]
>         if "sys.exit" in exception_line:
>             print "Trying to exit again!"
>             sys.exit(0)
>         else:
>             HTTPServer.handle_error(self, request, client_address)
> 
> This seems a really nasty hack though - any ideas for a cleaner way to
> do it?
> 
First of all, five hour response time is a high expectation, you must be 
a Platinum customer :-)

Secondly, while a try/except catching all exceptions *is* unusual it's 
justifiable in a server context (though some logging and/or analysis 
certainly wouldn't go amiss).

Thirdly your "ugly hack" *could* be replaced by something cleaner with 
more analysis of the trace structure, but given how infrequently this 
code is going to run and the low probability that anything else will 
trigger the hook I'd be happy with it as it is. But that's just me ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From pruebauno at latinmail.com  Wed Nov  1 14:31:28 2006
From: pruebauno at latinmail.com (pruebauno at latinmail.com)
Date: 1 Nov 2006 11:31:28 -0800
Subject: compiling on AIX 5.3 with vacpp
References: <1161895884.160561.308020@e3g2000cwe.googlegroups.com>
	<1162005830.878986.204250@m73g2000cwd.googlegroups.com>
Message-ID: <1162409488.718356.38600@e3g2000cwe.googlegroups.com>

nnorwitz at gmail.com wrote:
> pruebauno at latinmail.com wrote:
> > I am trying to compile Python 2.5 on AIX 5.3. I used
> >
> > building '_locale' extension
> > ./Modules/ld_so_aix xlc_r -q64 -bI:Modules/python.exp
> > build/temp.aix-5.3-2.5/home/pxadm/.test/Python-2.5/Modules/_localemodule.o
> > -L/usr/local/lib -o build/lib.aix-5.3-2.5/_locale.so
> > ld: 0711-317 ERROR: Undefined symbol: .bindtextdomain
> > ld: 0711-317 ERROR: Undefined symbol: .textdomain
> > ld: 0711-317 ERROR: Undefined symbol: .dcgettext
> > ld: 0711-317 ERROR: Undefined symbol: .dgettext
> > ld: 0711-317 ERROR: Undefined symbol: .gettext
>
> The problem is that an additional library is needed to link the locale
> module.  You will first need to determine what library is needed.
> Maybe libintl?  To find out, you can do a man on any of those symbols,
> for example, man textdomain.
>
> That should tell you want library is required.  You will then need to
> modify setup.py to add the extra library for the locale module.
> There's already some support for this in setup.py around line 390:
>
>         # access to ISO C locale support
>         data = open('pyconfig.h').read()
>         m = re.search(r"#s*define\s+WITH_LIBINTL\s+1\s*", data)
>         if m is not None:
>             locale_libs = ['intl']
>         else:
>             locale_libs = []
>         if platform == 'darwin':
>             locale_extra_link_args = ['-framework', 'CoreFoundation']
>         else:
>             locale_extra_link_args = []
>
>
>         exts.append( Extension('_locale', ['_localemodule.c'],
>                                libraries=locale_libs,
>                                extra_link_args=locale_extra_link_args)
> )
>
> Once you get something working, please post a patch.
>
> n

Thanks for the info Neil,

sorry for taking long to answer. This is skunkwork, I am working on it
whenever I get some time.

indeed as you say. libintl.h is required so I hard coded it into
setup.py to no effect. At what point does setup.py get called? by make?

my code
        # access to ISO C locale support
        data = open('pyconfig.h').read()
        m = re.search(r"#s*define\s+WITH_LIBINTL\s+1\s*", data)
        if m is not None:
            locale_libs = ['intl']
        else:
            locale_libs = []
        if platform == 'darwin':
            locale_extra_link_args = ['-framework', 'CoreFoundation']
        else:
            locale_extra_link_args = []

        locale_libs=['intl']

        exts.append( Extension('_locale', ['_localemodule.c'],
                               libraries=locale_libs,
                               extra_link_args=locale_extra_link_args) )



From larry.bates at websafe.com  Wed Nov 29 12:48:53 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 29 Nov 2006 11:48:53 -0600
Subject: Using Python
In-Reply-To: <mailman.839.1164818316.32031.python-list@python.org>
References: <mailman.839.1164818316.32031.python-list@python.org>
Message-ID: <E5ednTrVLPefVfDYnZ2dnUVZ_oydnZ2d@comcast.com>

beemer328i2004 wrote:
> Hi Guys,
> 
> I am new to this language and i need some help...
> 
> I am trying to create a script that will go into a log file and bring 
> me back the xml from an order...
> 
> For example:
> 
> go into Log1.xml and extract order number 2 from top to bottom and 
> extract it into a txt file...
> 
> Does anyone know how i can create this type of script or has like a 
> sample that i can use.. I am having a hard time starting the script..
> 
> hope someone can help
> 
> Thanks agian
> 
You should also review this module for parsing your XML:

http://effbot.org/zone/element-index.htm

elementree is now part of the standard library.

Note:  It would also help if you would post contents of log1.xml
so others could see what you are working with.  You should also
post whatever python code you have tried so far.

-Larry


From larry.bates at websafe.com  Sat Nov 18 14:22:44 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 18 Nov 2006 13:22:44 -0600
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <mailman.429.1163876907.32031.python-list@python.org>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
Message-ID: <NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>

Oleg Broytmann wrote:
> On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
>> Could anyone suggest me a simple IDE suitable for teaching Python as a
>> first programming language to high school students?
> 
>    Does it have to be an IDE? Wouldn't it be better to use a simple text
> editor + command line?
> 
> Oleg.
Not sure about cyrillic and I don't mean if you are looking for Windows
IDE, but I'm impressed with Pyscripter:

http://mmm-experts.com/Products.aspx?ProductId=4

-Larry


From JohnRoth1 at jhrothjr.com  Thu Nov  2 08:15:18 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 2 Nov 2006 05:15:18 -0800
Subject: other ways to check for <type 'function'>?
In-Reply-To: <mailman.1647.1162462909.11739.python-list@python.org>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<mailman.1647.1162462909.11739.python-list@python.org>
Message-ID: <1162473318.495571.55550@h54g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> elderic wrote:
>
> > are there other ways than the ones below to check for <type 'function'>
> > in a python script?
>
> callable(f)
>
> </F>

PEP 3100 specifies that the callable builtin is
to be removed in Python 3.0, together with what
I presume is the underlying C support for the
function.

Unfortunately, there are cases where it's not
advisable to call something to verify that it's
callable - calling it will cause irreversable
changes to the program state, while a
verification function should make no changes
to state. The advice is fundamentally bad
design.

On the other claw, I can  understand Guido's
point in wanting to get rid of it - it's got to be
an ugly piece of code with the Inappropriate
Intimacy code smell stinking up the place.

So what to do? Frankly, I'd back up a few
yards and consider the system design.
Where is the callable coming from? If it's
inside the team's scope of control, don't
bother checking it - the team should have
tests in place that verify that each site
passing a callable is passing the correct
object. If it's coming from outside, define
what's allowable and check that case by
case, preferably with consultation with 
your code's clients.

John Roth



From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 19:19:08 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 01:19:08 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163605597.576368.243640@f16g2000cwb.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
	<1163605597.576368.243640@f16g2000cwb.googlegroups.com>
Message-ID: <455ba985$0$7759$426a74cc@news.free.fr>

walterbyrd a ?crit :
> Larry Bates wrote:
> 
> 
>>I'd be surprised if there was more demand for PHP developers
>>than Python developers.
> 
> 
> Prepare to be surprised. From what I have seen demand for PHP
> developers is off-the-scale higher than demand for Python developers.

Anyone that knows how to program and understand the http protocol is 
already a PHP developer.

> If you search the job boards, then -IMO- it is only fair to not include
> jobs where the language is listed as an also-ran.

Then you'll find *very* few "Python developper" jobs.

> For example a typical
> sys-admin job will list about 24 skills, and python is often  thrown
> into the landry list. To my way of thinking, that is not really an ad
> for a python developer.

No, it's an ad for a sys-admin job.

FWIW, I've been hired as a web developer - not as a PHP or Java or 
whatever specific language programmer. Python wasn't even on the "landry 
list". Then we had to hire another developer to help me on a Zope-based 
project. We didn't hired a "Zope developer", nor even a "Python 
developer" - we hired a young C/Perl hacker with almost no prior web 
programming knowledge. Why ? Because he obviously was the best 
*programmer* we could find. As a matter of fact, he managed to become a 
productive Zope/Python programmer in less than two weeks.

> Trying to be as fair as I can be, my research shows that demand for
> developers where PHP is the primary is *far* higher than jobs where
> Python is the primary skills.

There are companies that believe that there are such things as "PHP 
programmer", "Java programmers", etc. And there are companies that know 
  the difference between a programmer and a code-monkey. The first one 
will ask for 10+ years of experience on a techno that is less than 5 
years old. The other will know a good coder when they meet one. Guess 
where are most 'Python programmers' working ?

> Of course, at best, that only shows the demand part of the equation.

Not even.

> There is also the supply side to consider. From what I have seen for
> salary offers for PHP developers, it may be fair to say that PHP
> developers are a dime a dozen.
> 

Anyone that knows how to program and understand the http protocol is 
already a PHP developer.


From bignose+hates-spam at benfinney.id.au  Tue Nov  7 17:45:07 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 08 Nov 2006 09:45:07 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
Message-ID: <877iy6oozw.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> But I do like Steve's suggestion that it's better to be explicit
> about each attribute, instead of just accepting a list of numbers
> (but I can't help but feel that for some reason this is better,
> because it's more general).

If you pass a *mapping* of the "I-might-want-to-add-more-in-the-future"
values, then you get both explicit *and* expandable, without an
arbitrary unneeded sequence.

-- 
 \     "He may look like an idiot and talk like an idiot but don't let |
  `\           that fool you. He really is an idiot."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney



From fredrik at pythonware.com  Mon Nov 20 12:58:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 18:58:32 +0100
Subject: ElementSOAP and <soap:Header>
In-Reply-To: <1164043598.088253.29790@m73g2000cwd.googlegroups.com>
References: <1164007864.239490.20810@k70g2000cwa.googlegroups.com>	<mailman.496.1164008567.32031.python-list@python.org>
	<1164043598.088253.29790@m73g2000cwd.googlegroups.com>
Message-ID: <ejsqch$s6j$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:

> May I confirm the following recommendations/dependencies:
> 1) if one wants to use ElementSOAP to create a message that includes
> <soap:Header>, it is recommended that one use the 0.5 release of
> ElementSOAP

yes.  or if you prefer not to upgrade, you can hack the "call" method to 
insert a header at the right place.

> 2) if one wants to use the 0.5 release of ElementSOAP, one should be
> using Python 2.5

no.  but if you're using earlier versions of Python, you also need a 
version of ElementTree that supports the "iterparse" interface (which 
means 1.2.5 or later).

</F>



From tim.hochberg at ieee.org  Fri Nov 17 08:21:49 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Fri, 17 Nov 2006 06:21:49 -0700
Subject: numpy magic: cast scalar returns auto to python types float &
	int   ?
In-Reply-To: <ejk69e$2g1$1@news.albasani.net>
References: <ejk69e$2g1$1@news.albasani.net>
Message-ID: <ejkd29$24n$1@sea.gmane.org>

robert wrote:
> Turning algs for old NumPy modules into numpy code I suffer from this:
> Upon further processing of returns of numpy calculations, lots of data in an apps object tree will become elementary numpy types.
> First there is some inefficiency in calculations. And then you get data inflation and questionable dependencies - e.g. with pickle,ZODB,mpi's ... :
> 
> 
>>>> l=array((1.,0))
>>>> l.prod()
> 0.0
>>>> cPickle.dumps(_)
> "cnumpy.core.multiarray\nscalar\np1\n(cnumpy\ndtype\np2\n(S'f8'\nI0\nI1\ntRp3\n(I2\nS'<'\nNNNI-1\nI-1\ntbS'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'\ntRp4\n."
>>>> cPickle.dumps(0.0)
> 'F0\n.'
>>>> l=array((1,0))
>>>> l.prod()
> 0
>>>> cPickle.dumps(_)
> "cnumpy.core.multiarray\nscalar\np1\n(cnumpy\ndtype\np2\n(S'i4'\nI0\nI1\ntRp3\n(I2\nS'<'\nNNNI-1\nI-1\ntbS'\\x00\\x00\\x00\\x00'\ntRp4\n."
>>>> cPickle.dumps(0)
> 'I0\n.'
>>>> type(l.prod())
> <type 'numpy.int32'>
> 
> 
> To avoid this you'd need a type cast in Python code everywhere you get scalars from numpy into a python variable. Error prone task. Or check/re-render your whole object tree.
> Wouldn't it be much better if numpy would return Python scalars for float64 (maybe even for float32) and int32, int64 ... where possible? (as numarray and Numeric did)
> I suppose numpy knows internally very quickly how to cast. 

The short answer is no, it would not be better. There are some trade 
offs involved here, but overall, always returning numpy scalars is a 
significant improvement over returning Python scalars some of the time. 
Which is why numpy does it that way now; it was a conscious choice, it 
didn't just happen.  Please search the archives of numpy-discussion for 
previous discussions of this and if that is not enlightening enough 
please ask at on the numpy-discussion list (the address of which just 
changed and I don't have it handy, but I'm sure you can find it).

For your particular issue, you might try tweaking pickle to convert 
int64 objects to int objects. Assuming of course that you have enough of 
these to matter, otherwise, I suggest just leaving things alone.

-tim



From steve at holdenweb.com  Thu Nov  9 12:11:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 11:11:01 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163089657.164900.112820@f16g2000cwb.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
Message-ID: <45536125.8000409@holdenweb.com>

Paul Boddie wrote:
> Michael Hobbs wrote:
>> I think the colon could be omitted from every type of compound
>> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
> 
> The FAQ answer. ;-)
> 
> http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements
> 
> Paul
> 
I suppose it would be even better if that hyperlink actually took you to 
  section 1.4.27 rather than 1.4.14 ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From john106henry at hotmail.com  Thu Nov 16 23:19:50 2006
From: john106henry at hotmail.com (John Henry)
Date: 16 Nov 2006 20:19:50 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
Message-ID: <1163737190.118975.227740@h48g2000cwc.googlegroups.com>

I did try them and I am impressed.  It helped me found a lot of useful
info.   I just want to get a feel as to what constitutes a "match".


Steven D'Aprano wrote:
> On Thu, 16 Nov 2006 16:40:49 -0800, John Henry wrote:
>
> > I am just wondering what's with get_close_matches() in difflib.  What's
> > the magic?   How fuzzy do I need to get in order to get a match?
>
>
> Why don't you try it and see?
>
> >>> from difflib import get_close_matches
> >>> get_close_matches("appel", ["ape", "apple", "peach", "puppy"])
> ['apple', 'ape']
> >>> import keyword as _keyword
> >>> get_close_matches("wheel", _keyword.kwlist)
> ['while']
> >>> get_close_matches("apple", _keyword.kwlist)
> []
> >>> get_close_matches("accept", _keyword.kwlist)
> ['except']
>
>
> Those example, by the way, come from here:
> 
> >>> help(get_close_matches)
> 
> 
> 
> 
> -- 
> Steven



From prouleau001 at gmail.com  Wed Nov 29 14:26:40 2006
From: prouleau001 at gmail.com (prouleau001 at gmail.com)
Date: 29 Nov 2006 11:26:40 -0800
Subject: Surprise with special floating point values
In-Reply-To: <mailman.845.1164824132.32031.python-list@python.org>
References: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>
	<mailman.845.1164824132.32031.python-list@python.org>
Message-ID: <1164828400.048314.71240@l12g2000cwl.googlegroups.com>



On Nov 29, 1:11 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> prouleau... at gmail.com wrote:
> > While trying to use simplejson under Python 2.4.3 I have been
> > investigating the handling of special floating point valuesnote that JSON doesn't support non-numeric floating point values, as can
> be seen by the "number" syntax description on this page:
>
>      http://www.json.org/
>
> (and as I pointed out in another thread on this topic, Python relies on
> the C library for serialization of floats, so non-numeric floating point
> values aren't portable between Python versions either).
>
> </F>

That's true, but I ran into a problem with simplejson under Python
2.4.3 on Win32, where it fails to serialize 1.0 properly (and  I
reported the problem to its author, and the fact that it works fine
under Python 2.5).  There is another thread (Inconsistency producing
constant for float "infinity") that talks about differences between
Python 2.5 and earlier versions regarding treatment of non-numeric
floating point values.  So, while investigating the simplejson problem,
I though I had found a problem with the handling of NaN (which
obviously is not the case).

- Pierre R.



From rpdooling at gmail.com  Wed Nov 22 00:36:50 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 21 Nov 2006 21:36:50 -0800
Subject: Caution newbie question: python window to stay open ?
In-Reply-To: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
References: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
Message-ID: <1164173810.364479.223490@m7g2000cwm.googlegroups.com>

mkengel wrote:

> Caution: newbie question

If you're pretty sure it's a common newbie question, then begin by
going to the Google repository at:

http://groups.google.com/group/comp.lang.python

Search in the box at upper right, on, say, keep cmd window open, or
keep dos window open.

Like so:

http://tinyurl.com/yfbtgx

And you'll have answers going all the way back to antiquity.

rd



From gagsl-py at yahoo.com.ar  Mon Nov 27 21:57:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 27 Nov 2006 23:57:48 -0300
Subject: combining the path and fileinput modules SOLVED
In-Reply-To: <4569182C.4040206@mac.com>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
	<7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
	<mailman.719.1164470313.32031.python-list@python.org>
	<tv1ah.3127$ql2.930@newsread3.news.pas.earthlink.net>
	<4569182C.4040206@mac.com>
Message-ID: <7.0.1.0.0.20061127235518.04cc2370@yahoo.com.ar>

At Sunday 26/11/2006 01:29, wo_shi_big_stomach wrote:

>for line in fileinput.input(g, inplace=1, backup='.bak'):
># just print 2nd and subsequent lines
>         if not fileinput.isfirstline():
>                 print line.rstrip('\n')
>         # check first line only
>         elif fileinput.isfirstline():
>                 if not re.search('^From ',line):
>                         print line.rstrip('\n')

Just a note: the elif is redundant, use a simple else clause.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From torriem at chem.byu.edu  Sat Nov  4 23:25:04 2006
From: torriem at chem.byu.edu (Michael Torrie)
Date: Sat, 04 Nov 2006 21:25:04 -0700
Subject: WebScraping
In-Reply-To: <pan.2006.11.05.02.40.17.857810@REMOVE.THIS.cybersource.com.au>
References: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
	<pan.2006.11.05.02.40.17.857810@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162700705.2121.4.camel@enterprise.local.lan>

On Sun, 2006-11-05 at 13:40 +1100, Steven D'Aprano wrote:
> On Sun, 05 Nov 2006 08:09:52 +1000, Graham Feeley wrote:
> 
> > Can someone steer me to scripts / modules etc on webscraping please???
> 
> The definitive documentation on the built-in Python modules can be found
> here: http://docs.python.org/modindex.html
> 
> The ActiveState Python cookbook should be useful, e.g.
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/391929
> 
> Also see Beautiful Soup:
> http://www.crummy.com/software/BeautifulSoup/

Beautiful soup is not always speedy, but it sure is the most flexible
scraper I've ever came across.  I hacked together a web forum-to-nntp
gateway using Beautiful Soup.  Worked very well.

Michael


> 
> And of course, GIYF ("Google Is Your Friend") http://www.google.com which
> leads me to:
> 
> http://sig.levillage.org/?p=588
> http://sig.levillage.org/2005/03/11/web-scraping-with-python-part-ii/
> http://wiki.tcl.tk/2915 (not focused on Python, but may still be useful).
> 
> 
> > Ultimately I would like someone to write a script for me.
> 
> Are you offering to hire a developer?
> 
> 
> -- 
> Steven.
> 



From bignose+hates-spam at benfinney.id.au  Sun Nov 12 04:38:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 12 Nov 2006 20:38:31 +1100
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
Message-ID: <87ejs9hunc.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:

> On Sun, 12 Nov 2006 02:31:04 +0100, Fredrik Lundh wrote:
> > (who uses fractional ZIP codes, btw?)
>
> Well, I can't speak for Americans, but here in Australia we
> typically give our post codes to six decimal places:
>
> Melbourne 3000.000000
> Brunswick 3056.000000
> Clifton Hill 3068.000000
> Sydney 2000.000000
> St Johns Park 2176.000000

Yeah, I know. As soon as that legislation came in, I started giving
the *precision* they asked for, with my own choice of *accuracy*, just
to mess with their damned totalitarian databases.

Melbourne 3000.000000
Brunswick 3000.000000
Clifton Hill 3000.000000

But you try to tell people overseas about this legislation, and they
just don't believe you.

-- 
 \          "It is well to remember that the entire universe, with one |
  `\       trifling exception, is composed of others."  -- John Andrew |
_o__)                                                           Holmes |
Ben Finney



From johnjsal at NOSPAMgmail.com  Tue Nov  7 16:15:19 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 16:15:19 -0500
Subject: sqlite query not working
In-Reply-To: <mailman.1854.1162933832.11739.python-list@python.org>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>
	<mailman.1854.1162933832.11739.python-list@python.org>
Message-ID: <4550f7a5$0$14445$c3e8da3@news.astraweb.com>

Steve Holden wrote:

> Have you tried adding a self.connection.commit() to the code? I don't 
> know whether sqlite is transactional, but if it is then the changes will 
> disappear without a commit.

Wow, that worked! Now, I know I've done some DB work before (very 
similar to this) and never used commit(), so I'm confused but still 
grateful! :)

Thanks!


From fuzzyman at gmail.com  Sat Nov 18 18:46:34 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 18 Nov 2006 15:46:34 -0800
Subject: decompiler
In-Reply-To: <Xns987F45C03807castleamber@130.133.1.4>
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
	<Xns987F45C03807castleamber@130.133.1.4>
Message-ID: <1163893594.341657.248720@k70g2000cwa.googlegroups.com>


John Bokma wrote:
> "jim" <gilbert3b2g at msn.com> wrote:
>
> > Is there such thing as a free decompile that I can run in windows xp
>
> You asked the same Q in comp.lang.perl.misc...

That's terrible. You read comp.lang.perl.misc *as well* ?

;-)

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From nitte.sudhir at gmail.com  Fri Nov  3 17:16:20 2006
From: nitte.sudhir at gmail.com (kath)
Date: 3 Nov 2006 14:16:20 -0800
Subject: how do I pass values between classes?
Message-ID: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>

hi everyone.........

I have a task, I have fragmented the task into subtask. I have planned
to create a class to each subclass and one parent class to handle the
sub tasks. Each subclass are saved in seperate file and all my
subclasses and parent class are placed in the same folder.

The parent class is subclass of wx.Frame, and subclasses are subclass
of wx.Panel. Each subclass will create a GUI for each task..

ok.. here is problem

When a menu is selected in the parent class, im instantiating the child
class(i.e, Panel), which has textbox and two buttons. first button is
used to select a file, and second one I have planned to, read the file
and pass the values to parent class [B]OR[/B] pass the filepath to
parent to read and do rest of the work.

How do I do that?

Please tell me whether I am following a correct method, by fragmenting
task  into small task and assigning it to child class and saving it in
a separate file?.

ok, here is the Parent class
[code]
import wx
import client
"""My Parent class"""
class Parent(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title)

        menu=wx.Menu()
        menu.Append(5000, "File")
        menu.AppendSeparator()
        menu.Append(5001, "Exit")
        menubar=wx.MenuBar()
        menubar.Append(menu, "File")
        self.SetMenuBar(menubar)
        self.Bind(wx.EVT_MENU, self.OnFile,id=5000)
        self.Bind(wx.EVT_MENU, self.OnExit,id=5001)

    def OnFile(self, event):
        self.cl=client.Child(self, -1)

    def OnBrowse(self, event):
        dir=""
        d=x.FileDialog(self, "Choose an Excel file", self.dirname, "",
"*.xls", wx.OPEN)
        if d.ShowModal() == wx.ID_OK:
            self.filename=d.GetFilename()
            self.dirname=d.GetDirectory()
            self.filepath.SetValue(os.path.join(self.dirname,
self.filename))

    def OnUpload(self, event):
        pass

    def OnExit(self, event):
        self.Close()

class MyApp(wx.App):
    def OnInit(self):
        frame=Parent(None, -1, "Parent window")
        frame.Show(True)
        self.SetTopWindow(frame)
        return True

if __name__ == '__main__':
    app=MyApp(redirect=False)
    app.MainLoop()

[/code]

and Child class
[code]
import wx, os

"""My Child class"""

class Child(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id, size=(300,300))
        box=wx.BoxSizer(wx.HORIZONTAL)
        label=wx.StaticText(self, -1, "File Path:  ")

        self.text=wx.TextCtrl(self, -1)
        browse=wx.Button(self, -1,"Browse")
        upload=wx.Button(self, -1, "Upload")
        self.Bind(wx.EVT_BUTTON, self.OnBrowse, browse)
        self.Bind(wx.EVT_BUTTON, self.OnUpload, upload)
        box.Add(label)
        box.Add(self.text)
        box.Add(browse)

        mainbox=wx.BoxSizer(wx.VERTICAL)
        mainbox.Add(box)
        mainbox.Add(upload)

        self.SetSizer(mainbox)
        mainbox.Layout()
    def OnBrowse(self, event):
        self.dir=""
        d=wx.FileDialog(self, "Choose an Excel file", self.dir, "",
"*.xls", wx.OPEN)
        if d.ShowModal() == wx.ID_OK:
            self.filename=d.GetFilename()
            self.dir=d.GetDirectory()
            self.text.SetValue(os.path.join(self.dir, self.filename))

    def OnUpload(self, event):
        pass

class MyApp(wx.App):
    def OnInit(self):
        frame=wx.Frame(None, -1, "Child window")
        panel=Child(frame, -1)
        frame.Show(True)
        self.SetTopWindow(frame)
        return True

if __name__ == '__main__':
    app=MyApp()
    app.MainLoop()
[/code]

thank you,
regards,
kath.



From duncan.booth at invalid.invalid  Thu Nov 23 06:52:20 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Nov 2006 11:52:20 GMT
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
	<pan.2006.11.23.11.27.54.956445@REMOVE.THIS.cybersource.com.au>
Message-ID: <Xns988478C80DEA4duncanbooth@127.0.0.1>

Steven D'Aprano wrote:

> No, you will never get two objects existing at the same time with the
> same id. You will get two objects that exist at different times with
> the same id, since ids may be reused when the object is deleted.
> 
I think it is worth pointing out that this is an area where people get 
confused quite often; it is very easily to get misleading results when you 
call the id() function. e.g.

>>> class C:
	def f(self): pass
	def g(self): pass

	
>>> c = C()
>>> id(c.f)==id(c.g)
True
>>> c.f is c.g
False

The ids are the same here only because the objects do not exist at the same 
time. In the first comparison c.f is an expression which creates a 
temporary object that is destroyed before the expression involving c.g is 
evaluated, so it is possible for the different objects to have the same id. 
In the second comparison the objects exist at the same time so they are 
forced to have different ids.


From vedran at v-programs.com  Wed Nov  1 10:25:59 2006
From: vedran at v-programs.com (vedran at v-programs.com)
Date: 1 Nov 2006 07:25:59 -0800
Subject: Beginning setup problem
Message-ID: <1162394759.233035.21380@f16g2000cwb.googlegroups.com>

Hello again,

Before few months,I write to this mailing list with python script
install problem,but nobody give me right solution.I work on windows
XP,and Python 2.4.
Now,when I write in Python 2.4:

>>> from distutils.core import setup
>>> setup(......) # whatever I write

I got the error:


Traceback (most recent call last):
  File "<pyshell#1>", line 1, in -toplevel-
    setup()
  File "C:\Python24\distutils\core.py", line 101, in setup
    _setup_distribution = dist = klass(attrs)
  File "C:\Python24\distutils\dist.py", line 130, in __init__
    setattr(self, method_name, getattr(self.metadata, method_name))
AttributeError: DistributionMetadata instance has no attribute
'get___doc__'

When I run setup.py with CMD:

python setup.py install   (or build or install)

Again I got the error:
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in -toplevel-
    setup()
  File "C:\Python24\distutils\core.py", line 101, in setup
    _setup_distribution = dist = klass(attrs)
  File "C:\Python24\distutils\dist.py", line 130, in __init__
    setattr(self, method_name, getattr(self.metadata, method_name))
AttributeError: DistributionMetadata instance has no attribute
'get___doc__'

                                                         Regards,
                                                         Vedran,
v-programs



From bdelmee at advalvas._REMOVEME_.be  Thu Nov  9 06:43:04 2006
From: bdelmee at advalvas._REMOVEME_.be (=?ISO-8859-1?Q?Bernard_Delm=E9e?=)
Date: Thu, 09 Nov 2006 12:43:04 +0100
Subject: cx_Oracle and NCLOBs
In-Reply-To: <1163068713.669375.308900@b28g2000cwb.googlegroups.com>
References: <1163068713.669375.308900@b28g2000cwb.googlegroups.com>
Message-ID: <45531454$0$1130$ba620e4c@news.skynet.be>

Sorry I have no direct answer for you, but suspect you should
post to the cx_Oracle group. Check the sourceforge project page.
It is also conveniently mirrored at news.gmane.org.


From stanc at al.com.au  Fri Nov 17 02:04:30 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Nov 2006 18:04:30 +1100
Subject: popen(1-4) as a seperate process
In-Reply-To: <ejjmm8$q90$1@sea.gmane.org>
References: <455D3F18.40902@al.com.au> <ejjmm8$q90$1@sea.gmane.org>
Message-ID: <455D5EFE.40803@al.com.au>

Fredrik Lundh wrote:
> Astan Chee wrote:
>
>   
>> Im trying to popen (or more specifically os.popen4() ) from wxPython. 
>> I've read the documentation on popen and it says I can do a popen as a 
>> seperate process or popen not as a child process
>>     
>
> where does it say that?  afaik, the whole point of the popen API is to 
> run an external process and use pipes to communicate with it.
>
> </F>
>
>   
Yes, that is true. But everytime I run a os.popen() it executes as a 
child process of the current running one. How do I launch as a seperate 
process?
Note that I dont care about whatever happens to the seperate process 
itself.
Thanks
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From jstroud at mbi.ucla.edu  Sun Nov  5 08:04:19 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 05 Nov 2006 13:04:19 GMT
Subject: finding the list of the matched strings
In-Reply-To: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
References: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
Message-ID: <gel3h.22544$TV3.1150@newssvr21.news.prodigy.com>

jm.suresh at no.spam.gmail.com wrote:
> Hi, I have a list of strings. And I want to find the subset which
> matches a particular regular expression.
> 
> import re
> ll = ('a', 'b', 's1', 's2', '3s')
> p = re.compile('^s.*')
> newList = filter(lambda s: p.match(s), ll)
> 
> I suppose there should be simple function to do this in re module. Is
> there any?
> 
> I searched google, but could not find one, may be for keywords were not
> perfect.
> 
> Thanks.
> Suresh
> 

I think I'm having some network problems. I'll try again. Also the 
previous "attempt" had a typo (perhaps a freudian slip).

",".join(some_list).

By the way, don't name your own objects with the names of built-in 
types, such as "list" or "str", etc.


From bhartesh at gmail.com  Thu Nov  2 14:52:57 2006
From: bhartesh at gmail.com (Bhartesh Doshi)
Date: Thu, 2 Nov 2006 14:52:57 -0500
Subject: Accessing Javascript variable in python chunk in spyce
Message-ID: <9df2a5ae0611021152j468d4884uc5380b2d020acb62@mail.gmail.com>

Hi.
I am using spyce and coding protions in java script and python chunks. I
want to use a variable defined and calculated in java script in a python
chunk. Is this possible.

Regards,
Bhartesh.
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From haraldarminmassa at gmail.com  Sat Nov  4 08:07:28 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 4 Nov 2006 05:07:28 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <1162645648.361708.99490@f16g2000cwb.googlegroups.com>

robert,

> Interprocess communication is tedious and out of questio
[...]
> I expect to be able to directly push around Python Object-Trees between the 2 (or more) interpreters by doing some careful locking.

Please do yourself a favour and have a look at pyro. pyro makes
InterComputer and InterProcess Communication a snap. And it allows you
to push around Python Objects not only between processes, but
computers.

Maybe it solves your problem much easier and even more than you want to
solve it now by being able to use more then one computer.

Harald



From larry.bates at websafe.com  Sat Nov  4 09:08:15 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 04 Nov 2006 08:08:15 -0600
Subject: how do I pass values between classes?
In-Reply-To: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
Message-ID: <454C9ECF.5020806@websafe.com>

kath wrote:
> hi everyone.........
> 
> I have a task, I have fragmented the task into subtask. I have planned
> to create a class to each subclass and one parent class to handle the
> sub tasks. Each subclass are saved in seperate file and all my
> subclasses and parent class are placed in the same folder.
> 
> The parent class is subclass of wx.Frame, and subclasses are subclass
> of wx.Panel. Each subclass will create a GUI for each task..
> 
> ok.. here is problem
> 
> When a menu is selected in the parent class, im instantiating the child
> class(i.e, Panel), which has textbox and two buttons. first button is
> used to select a file, and second one I have planned to, read the file
> and pass the values to parent class [B]OR[/B] pass the filepath to
> parent to read and do rest of the work.
> 
> How do I do that?
> 
> Please tell me whether I am following a correct method, by fragmenting
> task  into small task and assigning it to child class and saving it in
> a separate file?.
> 
> ok, here is the Parent class
> [code]
> import wx
> import client
> """My Parent class"""
> class Parent(wx.Frame):
>     def __init__(self, parent, id, title):
>         wx.Frame.__init__(self, parent, id, title)
> 
>         menu=wx.Menu()
>         menu.Append(5000, "File")
>         menu.AppendSeparator()
>         menu.Append(5001, "Exit")
>         menubar=wx.MenuBar()
>         menubar.Append(menu, "File")
>         self.SetMenuBar(menubar)
>         self.Bind(wx.EVT_MENU, self.OnFile,id=5000)
>         self.Bind(wx.EVT_MENU, self.OnExit,id=5001)
> 
>     def OnFile(self, event):
>         self.cl=client.Child(self, -1)
> 
>     def OnBrowse(self, event):
>         dir=""
>         d=x.FileDialog(self, "Choose an Excel file", self.dirname, "",
> "*.xls", wx.OPEN)
>         if d.ShowModal() == wx.ID_OK:
>             self.filename=d.GetFilename()
>             self.dirname=d.GetDirectory()
>             self.filepath.SetValue(os.path.join(self.dirname,
> self.filename))
> 
>     def OnUpload(self, event):
>         pass
> 
>     def OnExit(self, event):
>         self.Close()
> 
> class MyApp(wx.App):
>     def OnInit(self):
>         frame=Parent(None, -1, "Parent window")
>         frame.Show(True)
>         self.SetTopWindow(frame)
>         return True
> 
> if __name__ == '__main__':
>     app=MyApp(redirect=False)
>     app.MainLoop()
> 
> [/code]
> 
> and Child class
> [code]
> import wx, os
> 
> """My Child class"""
> 
> class Child(wx.Panel):
>     def __init__(self, parent, id):
>         wx.Panel.__init__(self, parent, id, size=(300,300))
>         box=wx.BoxSizer(wx.HORIZONTAL)
>         label=wx.StaticText(self, -1, "File Path:  ")
> 
>         self.text=wx.TextCtrl(self, -1)
>         browse=wx.Button(self, -1,"Browse")
>         upload=wx.Button(self, -1, "Upload")
>         self.Bind(wx.EVT_BUTTON, self.OnBrowse, browse)
>         self.Bind(wx.EVT_BUTTON, self.OnUpload, upload)
>         box.Add(label)
>         box.Add(self.text)
>         box.Add(browse)
> 
>         mainbox=wx.BoxSizer(wx.VERTICAL)
>         mainbox.Add(box)
>         mainbox.Add(upload)
> 
>         self.SetSizer(mainbox)
>         mainbox.Layout()
>     def OnBrowse(self, event):
>         self.dir=""
>         d=wx.FileDialog(self, "Choose an Excel file", self.dir, "",
> "*.xls", wx.OPEN)
>         if d.ShowModal() == wx.ID_OK:
>             self.filename=d.GetFilename()
>             self.dir=d.GetDirectory()
>             self.text.SetValue(os.path.join(self.dir, self.filename))
> 
>     def OnUpload(self, event):
>         pass
> 
> class MyApp(wx.App):
>     def OnInit(self):
>         frame=wx.Frame(None, -1, "Child window")
>         panel=Child(frame, -1)
>         frame.Show(True)
>         self.SetTopWindow(frame)
>         return True
> 
> if __name__ == '__main__':
>     app=MyApp()
>     app.MainLoop()
> [/code]
> 
> thank you,
> regards,
> kath.
> 
You might consider doing it the same way wx passes things around.
When you instantiate the subclass pass the parent class' instance
as first argument to __init__ method.  That way the subclass can
easily pass values back to the parent by using that pointer.

-Larry


From bearophileHUGS at lycos.com  Sun Nov  5 09:53:21 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 5 Nov 2006 06:53:21 -0800
Subject: string to list of numbers conversion
In-Reply-To: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <1162738401.227476.284950@e3g2000cwe.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Hi,
>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>   Is there any alternative way?

This is a possibile solution, no input errors are taken into account:

>>> s = '((1,2), (3,4), (-5,9.2))'
>>> from string import maketrans
>>> tab = maketrans("(), ", " "*4)
>>> s.translate(tab)
'  1 2    3 4    -5 9.2  '
>>> l = s.translate(tab).split()
>>> l
['1', '2', '3', '4', '-5', '9.2']
>>> l2 = map(float, l)
>>> l2
[1.0, 2.0, 3.0, 4.0, -5.0, 9.1999999999999993]
>>> # This is partition(l2, 2)
>>> [l2[i:i+2] for i in xrange(0, len(l2), 2)]
[[1.0, 2.0], [3.0, 4.0], [-5.0, 9.1999999999999993]]

Bye,
bearophile



From jussij at zeusedit.com  Wed Nov  8 22:08:37 2006
From: jussij at zeusedit.com (jussij at zeusedit.com)
Date: 8 Nov 2006 19:08:37 -0800
Subject: auto indent
References: <mailman.1816.1162844560.11739.python-list@python.org>
Message-ID: <1163041717.308959.151840@h54g2000cwb.googlegroups.com>

M.N.Smadi wrote:

> i have a script that is not indented properly. Is there
> a way that i can have it auto indented.

FWIW the Zeus for Windows IDE will fold Pyhon code:

   http://www.zeusedit.com/features.html

With the code folded you can then select the folded line and
using 'tab'/'shift tab' Zeus will indent/re-indent all the
lines contained in the fold.

It is not an automatic re-indenting solution but it might be
better than nothing ;)

Jussi Jumppanen
Author: Zeus for Windows IDE



From george.sakkis at gmail.com  Thu Nov 23 15:21:52 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 23 Nov 2006 12:21:52 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<mailman.564.1164158130.32031.python-list@python.org>
	<ek4e6j$hfn$1@panix3.panix.com>
	<4565f8f7$0$8460$426a74cc@news.free.fr>
Message-ID: <1164313312.818503.168790@j72g2000cwa.googlegroups.com>

Bruno Desthuilliers wrote:

> AFAIK, everything you do with old-style classes can be done with new-style ones.

The only thing I occasionally (or rather rarely) miss about old-style
classes is instance-specific special methods:

>>> class C:
...     def __init__(self,x):
...         self.__getitem__ = lambda i: i*x
...
>>> c=C(2)
>>> c[3]
6
>>> class N(object):
...     def __init__(self,x):
...         self.__getitem__ = lambda i: i*x
...
>>> n=N(2)
>>> n[3]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unindexable object

Of course this example can be rewritten to work for new style classes;
a trickier would be to bind the instance attribute conditionally;
here's a silly example:

>>> class C:
...     def __init__(self,x):
...         if random.random() > 0.5:
...             self.__getitem__ = lambda i: i*x

I'm not sure if this is a conscious choice or a technical limitation of
how new-style classes work internally, but I've had a use for it at
least once.

George



From haraldarminmassa at gmail.com  Sat Nov  4 08:00:15 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 4 Nov 2006 05:00:15 -0800
Subject: codecs - where are those on windows?
In-Reply-To: <mailman.1493.1162223454.11739.python-list@python.org>
References: <1162202194.839564.30470@b28g2000cwb.googlegroups.com>
	<45461B1B.6070101@redlinepy.com>
	<mailman.1493.1162223454.11739.python-list@python.org>
Message-ID: <1162645215.005872.35230@i42g2000cwa.googlegroups.com>


Fredrik Lundh schrieb:

> > If your installation directory is C:\Python25, then look in
> > C:\Python25\lib\encodings
>
> that's only the glue code.  the actual data sets are provided by a bunch
> of built-in modules:
>  >>> import sys
>  >>> sys.builtin_module_names
> ('__builtin__', '__main__', '_ast', '_bisect', '_codecs',
> '_codecs_cn', '_codecs_hk', '_codecs_iso2022', '_codecs_jp',
> '_codecs_kr', '_codecs_tw', ...

So, it should be possible to do a custom build of python24.dll /
python25.dll without some of those codecs, resulting in a smaller
python24.dll ?

It will be some time untill my apps must support Chinese and
Japanese...

Harald



From sturlamolden at yahoo.no  Wed Nov  8 13:55:47 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 8 Nov 2006 10:55:47 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <1163007675.919803.158010@m7g2000cwm.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1163007675.919803.158010@m7g2000cwm.googlegroups.com>
Message-ID: <1163012147.305772.191560@i42g2000cwa.googlegroups.com>


sturlamolden wrote:

> 3. One often uses cluster architectures (e.g. Beowulf) instead of SMPs
> for scientific computing. MPI works on SMP and clusters. Threads only
> work on SMPs.

Following up on my previous post, there is a simple Python MPI wrapper
that can be used to exploit multiple processors for scientific
computing. It only works for Numeric, but an adaptaion to NumPy should
be easy (there is only one small C file in the source):

http://datamining.anu.edu.au/~ole/pypar/

If you are using Windows, you can get a free implementation of MPI
here:

http://www-unix.mcs.anl.gov/mpi/mpich1/mpich-nt/



From fredrik at pythonware.com  Fri Nov  3 02:45:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 08:45:21 +0100
Subject: __doc__ in compiled script
In-Reply-To: <7.0.1.0.0.20061102215407.05c151e0@yahoo.com.ar>
References: <mailman.1686.1162499924.11739.python-list@python.org>	<eidltd$v0m$01$2@news.t-online.com>
	<7.0.1.0.0.20061102215407.05c151e0@yahoo.com.ar>
Message-ID: <eies30$20n$1@sea.gmane.org>

Gabriel Genellina wrote:

>> >>> co.co_consts[list(co.co_names).index("__doc__")]
>> 'This is a docstring'
> 
> Good! I'll buy this one :) thanks!

however, there's no 1:1 mapping between names and constants; if you want 
code that works by accident, you might as well use co_consts[0].

</F>



From claird at lairds.us  Wed Nov  8 08:39:06 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 8 Nov 2006 13:39:06 +0000
Subject: Python deployment options.
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162986129.233443.268730@h54g2000cwb.googlegroups.com>
	<1162990156.204577.198720@h48g2000cwc.googlegroups.com>
Message-ID: <q83924-6tv.ln1@lairds.us>

In article <1162990156.204577.198720 at h48g2000cwc.googlegroups.com>,
Richard Charts <richard.charts at gmail.com> wrote:
			.
			.
			.
>Well on a Win machine, probably.
>Almost every Linux machine you come across will have (most likely a
>fairly recent build of) python.  For Macs, I'm not so sure but it's
>probably closer to Linux than Win.
>

Recent releases of Mac OS build in Python.


From siona at chiark.greenend.org.uk  Mon Nov 13 10:56:28 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 13 Nov 2006 15:56:28 +0000 (GMT)
Subject: httplib.InvalidURL: nonnumeric port: For characters in the
	proxypassword in URL
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<mailman.40.1163409170.32031.python-list@python.org>
	<1163419232.632721.192360@i42g2000cwa.googlegroups.com>
	<mailman.52.1163419946.32031.python-list@python.org>
Message-ID: <GEx*RvIvr@news.chiark.greenend.org.uk>

Fredrik Lundh <fredrik at pythonware.com> wrote:
>>>> urllib.quote
><function quote at 0x00F430F0>
>>>> urllib2.quote
><function quote at 0x00F430F0>

>>> urllib.quote
<function quote at 0x41cb9d84>
>>> urllib2.quote
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'quote'
>>> sys.version
'2.4.1 (#2, May  5 2005, 11:32:06) \n[GCC 3.3.5 (Debian 1:3.3.5-12)]'

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From sybrenUSE at YOURthirdtower.com.imagination  Thu Nov  2 06:35:06 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 2 Nov 2006 12:35:06 +0100
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
	<4549cf05$0$9363$426a74cc@news.free.fr>
Message-ID: <slrnekjlva.rj5.sybrenUSE@schuimige.stuvel.eu>

Christophe enlightened us with:
> I don't think it's a good idea because when you place a try catch
> block around a function call, you'll catch any exception thrown by
> the function itself and not only the "cannot be called" exception.

That depends on the exception you're catching, doesn't it?

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From jkn_gg at nicorp.f9.co.uk  Tue Nov 21 06:50:30 2006
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 21 Nov 2006 03:50:30 -0800
Subject: Misleading IOerror when opening a non-existent file for append?
In-Reply-To: <Xns9881A3E1817EArtwfreenetREMOVEcouk@216.196.109.145>
References: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
	<1164037676.537263.53480@f16g2000cwb.googlegroups.com>
	<Xns9881A3E1817EArtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1164109830.629768.51130@k70g2000cwa.googlegroups.com>

Hi there
    Thanks for the comments. I see that I actually confused myself a
bit with my posting. It's been a while and I mistook the use of '/' as
a platform-independent directory delimiter with the use of '\\'.

I also thought that I was seeing something similar on Windows and
Linux. This may not be the case ;-o.

So, to try again. It looks as it the attempt to open a non-existent
file (for instance, because the parent folder does not exist) gives an
odd error on Linux but not on Windows.

On Windows:

> >>> f = file(r'c:\does-not-exist\DoesNotExist.txt','a')
>
> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in <module>
>     f = file(r'c:\does-not-exist\DoesNotExist.txt','a')
> IOError: [Errno 2] No such file or directory: 'c:\\does-not-exist
> \\DoesNotExist.txt'
> >>>

(replacing the '\' with '/' gives the same message, which is what I was
trying to convey)

On Linux, you get the 'Bad mode' error.

    Strange?!

    Jon N



From bignose+hates-spam at benfinney.id.au  Mon Nov 13 23:56:15 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 14 Nov 2006 15:56:15 +1100
Subject: Test-driven development of random algorithms
References: <pan.2006.11.14.03.25.53.274332@REMOVEME.cybersource.com.au>
	<ejbdkv$ftl$1@sea.gmane.org>
Message-ID: <87fycmhbio.fsf@benfinney.id.au>

Robert Kern <robert.kern at gmail.com> writes:

> Steven D'Aprano wrote:
> > Does anyone have generic advice for the testing and development of
> > this sort of function?
>
> "Design for Testability". In library code, never call the functions
> in the random module. Always take as an argument a random.Random
> instance. When testing, you can seed your own Random instance and
> all of your numbers will be the same for every test run.

Even better, you can pass a stub Random instance (that fakes it) or a
mock Random instance (that fakes it, and allows subsequent assertion
that the client code used it as expected). This way, you can ensure
that your fake Random actually gives a sequence of numbers designed to
quickly cover the extremes and corner cases, as well as some normal
cases.

This applies to any externality (databases, file systems, input
devices): in your unit tests, dont pass the real externality. Pass a
convincing fake that will behave entirely predictably, but will
nevertheless exercise the functionality needed for the unit tests.

This is one of the main differences between unit tests and other
kinds. With unit tests, you want each test to exercise as narrow a set
of the client behaviour as feasible. This means eliminating anything
else as a possible source of problems. With other tests -- stress
tests, acceptance tests, and so on -- you want to exercise the entire
application stack, or some significant chunk of it.

-- 
 \       "It is the mark of an educated mind to be able to entertain a |
  `\                      thought without accepting it."  -- Aristotle |
_o__)                                                                  |
Ben Finney



From bugracakir at gmail.com  Thu Nov 16 08:20:01 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Thu, 16 Nov 2006 15:20:01 +0200
Subject: Heap Memory
Message-ID: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>

Hi my name is Bugra Cakir,

I have a question. How can we increase heap memory or total memory Python
interpreter
will use in order to avoid memory problems ?
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From phil at riverbankcomputing.co.uk  Sat Nov 18 13:07:33 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 18 Nov 2006 18:07:33 +0000
Subject: please help me choose a proper gui library.
In-Reply-To: <f81479dd0611180944h6916db1bs47ec2e05b4a2a399@mail.gmail.com>
References: <f81479dd0611180944h6916db1bs47ec2e05b4a2a399@mail.gmail.com>
Message-ID: <200611181807.33571.phil@riverbankcomputing.co.uk>

On Saturday 18 November 2006 5:44 pm, krishnakant Mane wrote:
> hello all.
> after finishing a project in record time using python we have taken up
> one more project.
> this time however, we need to do a gui based project  which will run
> on windows xp and 2000.
> now My question is which gui toolkit should I choose?
> I had initially raised some doubt about accessibility (which is very
> important for me ), and with the answers and all the pointers given, I
> know that wxpython is quite out of question.
> now my next choice is PyQT.
> can some one give me information on the following points?
> 1.  do I first need to install the pure c++ based QT library both on
> the developer machine and the client's user machine?

You have to install Qt first. You only need to install the run-time elements 
(ie. the DLLs) on the client's machine. Unless your application is licensed 
under the GPL (and you are using the GPL version of Qt and PyQt) then there 
are components of Qt that you must not install on the client's machine.

> 2.  I need an executable binary installer for windows xp.  is it
> available for python24?  I searched but found one for python25.  else
> kindly guide me what should I do to install the source.  I read the
> documentation but did not get the clear idea whether I must have qt
> installed first or not.  if yes are there binary installers of PYQT
> which can also install qt?

The only binary installer provided is for the GPL version of PyQt. Qt has 
separate installers. It's easy enough to use something like NSIS to create 
your own installer for your application that includes everything that it 
needs.

> 3. if I need to upgrate to python25, should it be considered safe?

PyQt fully supports Python 2.5.

> 4.  I don't want to use the qt IDE and this point is nothing to do
> with qt, I need a good windows based python editor.

Google for the different ones and try them out.

> 5.  if I am supposed to also distrubute qt with PYQT, how do I plan
> the deployment of my ready software?

In addition to your application you need to distribute the Qt DLLs (and 
plugins if you use them), the corresponding PyQt .pyd files and sip.pyd. If 
you are using the GPL version of Qt then you may also need to consider the 
MinGW DLLs. Finally you need to consider if you need to distribute Python 
itself.

You might like to look at tools like PyInstaller for creating single 
executables.

Phil


From bignose+hates-spam at benfinney.id.au  Thu Nov  2 00:55:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Nov 2006 16:55:31 +1100
Subject: can I import the module twice (under differnet names)
References: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>
Message-ID: <87bqnq4cks.fsf@benfinney.id.au>

alf <ask at me.xs4all.nl> writes:

> wonder if in the python I could treat modules imorts like classes
> instances. It means I could import it twice or more times under
> different names.

No need to import more than once. The 'import' statement binds a
module object to the specified name, and you can bind as many names as
you like to the same object.

    >>> import sys
    >>> foo = sys
    >>> bar = sys
    >>> print sys.maxint
    2147483647
    >>> print foo.maxint
    2147483647
    >>> print bar.maxint
    2147483647

-- 
 \           "Laugh and the world laughs with you; snore and you sleep |
  `\                                             alone."  -- Anonymous |
_o__)                                                                  |
Ben Finney



From Rony.Flatscher at wu-wien.ac.at  Sat Nov 25 10:06:08 2006
From: Rony.Flatscher at wu-wien.ac.at (rony)
Date: Sat, 25 Nov 2006 16:06:08 +0100
Subject: Ruby/Python/REXX as a MUCK scripting language
In-Reply-To: <2006112418112116807-zobeid@techiecom>
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <45685BE0.10209@wu-wien.ac.at>

Hi Tony,

Tony Belding wrote:
> I'm interested in using an off-the-shelf interpreted language as a
> user-accessible scripting language for a MUCK.  I'm just not sure if I
> can find one that does everything I need.  The MUCK must be able to call
> the interpreter and execute scripts with it, but the interpreter must
> also be able to call functions in the MUCK code.  And then there's the
> security issue that really worries me. . .  I have to be able to limit
> what the interpreter can execute.  I can't have my users running scripts
> that access the console, access the filesystem or sockets directly, or
> call libraries or other binaries outside the MUCK.
> 
> Is this practical?  I'm thinking of Ruby or Python for this, if they can
> meet the requirements.
> 
> I might even consider REXX. . .  I remember ARexx from my Amiga days,
> and how great it was for string manipulation and application scripting.
> However. . .  My immediate target platform, Mac OS X, comes with Ruby
> and Python but not REXX, so that's a disadvantage.
> 
> My final option would be to create my own language interpeter where I
> have control over everything that happens.  That is what MUCKs have
> always done in the past.  But the result was always quirky, limited
> languages like MUF (Multi-User Forth) which really turn off a lot of
> coders.  Furthermore, I've never created a language before, and it would
> be a lot of extra work for me.

Well, a few remarks here ad the REXX options that would be available to you:

- REXX (there was its 25th anniversary celebrated in 2004) has an object-oriented successor that
still can execute plain REXX code, but is realized as an object-oriented language: Object REXX. It
got originally developed by IBM, after their big customers indicated that they would be interested
in it. In 1997 Object REXX became part of OS/2 Warp 4. IBM sold Object REXX for AIX and Windows.

- In 2004 after negotiations took place with the non-profit Rexx Language Association (RexxLA,
http://www.RexxLA.org), IBM handed the source code of Object REXX over to the RexxLA which created a
free and open source version and distributed it in April 2005 for the first time as Open Object Rexx
(ooRexx) 3.0, cf. <http://www.ooRexx.org>).

- The ooRexx source-code is hosted on Sourceforge and uses the Common Public License (CPL) 1.0 (cf.
<http://www.opensource.org/licenses/cpl1.0.php>). This means that you can freely use the code, edit
it your way and make it even part of your own (even commercial) product.

- This week a new drop of ooRexx, version 3.1.1, has been released, with binaries built for AIX
(first time that an official ooRexx binary got build for it!), Linux, MacOSX (first time that an
official ooRexx binyry got build for it PPC, Intel), Solaris (Intel, Sparc), and Windows.
[Additional binaries for additional environments can be built using the autoconf tools.]
So ooRexx has been made available for your main target platform for your MUCK application.

- Ad your needs w.r.t. calling functions of your MUCK applicaiton: yes, that is possible (and not
difficult at all).

- Ad your needs w.r.t. security needs of your MUCK application: yes, that is possible (and not
difficult at all):
Because of the history of ooRexx (it was a commercial product to be deployed at large sites,
security was a paramount issue), there is a Security Manager built into ooRexx.
The ooRexx security architecture is quite interesting, easy to use, very flexible as it allows you
to create as many differenct security policy rules as you may wish. The ooRexx security manager will
monitor all potential insecure actions from REXX and ooRexx programs (like accessing the
environment, accessing streams, accessing functions etc.) and inform the policy program about such
intended, possibly secure-threatening operations. The policy program then is able to decide to let
the action through, to execute a secure operation instead without the supervised REXX or ooRexx
program noticing this (!), or stop the execution of the supervised program alltogether.
If you are interested in this and need ideas, help for your MUCK needs, then please post, such that
people over here (ie. the <news:comp.lang.rexx>) can help you out.

- Ad ooRexx in general: it is an easy to learn and easy to use (follows still the original REXX
philosophy to be a "human centric" language!!), fully object-oriented language (influenced by
Smalltalk). There is a small, tutorial-like paper (written for this year's European Conference of
Object-Oriented Programming, ECOOP, workshop named "Revival of Dynamic Languages (RDL)
<http://prog.vub.ac.be/~wdmeuter/RDL06/>", which really gives a brief overview of the history and
the (interesting) features of the ooRexx langauge, entitled "Resurrecting REXX, Introducing Object
Rexx", to enable reflection and discussion of the language and its interesting concepts, cf.:
<http://prog.vub.ac.be/~wdmeuter/RDL06/Flatscher.pdf>. At the end of the paper there are a few, but
actually quite impressive nutshell examples, demonstrating the ease and power of ooRexx in different
environments.

- Ad prospects of ooRexx: ooRexx is actively being developed and enhanced. The RexxLA has been
organizing a yearly "International Rexx Symposium", the 2007 symposium to probably take place in
Tampa, Florida, USA, from April 29th, 2007, through May 3rd, 2007. Maybe you or your partners may
want to stop by there (the conferences are rather personal, you get to meet everyone in person who
has been actively developing ooRexx and ooRexx applications)? 8-))

Again, if you have any questions, please post them.

Regards,

---rony

P.S.: I have been using ooRexx in classes introducing MIS students to oo-concepts and programming,
such that "enduser-programmer" kind of people can successfully deploy their acquired skills to
automate/remote-control/script Windows, Windows applications, but also Java and Java applications
and applications like OpenOffice/StarOffice possessing Java interfaces. As a matter of fact, such
students become able to create scripts to drive e.g. OpenOffice which run unchanged e.g. on MacOS,
Linux and Windows, which is actually very cost-effective and impressive, if one thinks about it!





From johnjsal at NOSPAMgmail.com  Thu Nov  9 10:29:40 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 09 Nov 2006 10:29:40 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <45525b3e$0$32029$426a34cc@news.free.fr>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45524f40$0$32365$c3e8da3@news.astraweb.com>
	<45525b3e$0$32029$426a34cc@news.free.fr>
Message-ID: <4553488e$0$12978$c3e8da3@news.astraweb.com>

Bruno Desthuilliers wrote:
> John Salerno a ?crit :
>> Peter Otten wrote:
>>
>>> You may need a no-op implementation of fix_attributes() in the Character
>>> class.
>>
>>
>> What does that mean? Is that in case I use Character directly to 
>> create an object?
> 
> Most propbably it can be useful for other character classes that don't 
> need too fix attributes.

Ah, I get it!


From johnjsal at gmail.com  Thu Nov  2 11:51:39 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 08:51:39 -0800
Subject: creating new objects with references to them
In-Reply-To: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
Message-ID: <1162486298.863881.261790@h54g2000cwb.googlegroups.com>

JohnJSal wrote:

> Hope that makes sense. It seems like such a common task.

Ok, I'm thinking about the suggestion to make a list, but I'm still
confused. Even with a list, how do I access each instance. Would I have
to do it by index? I assume I'd do something like this:

self.records = []    # list for storing instances

Then when "New Record" is clicked:

def OnNewRecord(self, event):
    self.records.append(Researchers())

But now what? There is still no reference to that instance? The only
thing I can think of is that each record will be a tab in a wxPython
notebook control, and each tab can be referenced by index. So whichever
tab I'm on, I can use that index to get that particular instance in the
list.

But this solution seems too tied to my particular implementation. How
would you normally access these instances in the list?

Let's say there are three objects in the list. Someone fills out the
text fields for the second one and clicks "Save". I know how to read
all the information in the fields, but how do I then associate it with
that second instance?

(Or I wonder if I really even need to, since upon saving, the
information gets stored in the database immediately. Maybe I don't even
need a Researcher class at all.)



From shansen at advpubtech.com  Wed Nov 22 23:40:12 2006
From: shansen at advpubtech.com (Stephen Hansen)
Date: Wed, 22 Nov 2006 20:40:12 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
Message-ID: <7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>

> 3.) Can I have an HTML version?
> A) No, we like it pretty.


The interesting thing is, there's nothing in your layout or format that you
can't do with some nice standards-compliant HTML and CSS. It could look
identical as HTML-- and be significantly more "reachable" by people, easier
for them to use and read, link to, and so on and so forth.

Plus you could stick some Google adwords ads on it :)

But, really... if you're eventually wanting this to be a
printed/published/mailed sort of thing, I can understand why you'd want to
do it as a PDF... but you will be limiting your audience in the meantime. A
lot of people just find it too tedious and difficult, and if your goal is to
reach people and communicate....

Why not do both? Might take a bit more work-- but the layout you have isn't
that hard to do in HTML, and there's gotta be a way to html2pdf... I've
never wanted to, but there has to be. =)
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From john106henry at hotmail.com  Fri Nov 17 15:01:01 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 12:01:01 -0800
Subject: remove a list from a list
In-Reply-To: <mailman.372.1163792759.32031.python-list@python.org>
References: <ejkv1u$ajf$1@sea.gmane.org><455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org> <455E0A20.9000509@tim.thechases.com>
	<ejl2re$ns3$1@sea.gmane.org>
	<mailman.372.1163792759.32031.python-list@python.org>
Message-ID: <1163793661.856365.202930@b28g2000cwb.googlegroups.com>

The curve ball is the case insensitivity otherwise it's a
straightforward set operation.

I wonder if it's possible to sub-class set and make the item
comparision case insensitive.

Anybody knows how to do that?



Tim Chase wrote:
> > Yeah, I ended up doing a similar kind of loop. That is pretty messy.
> >
> > Is there any other way?
>
> I've already provided 2 (or 3 depending on how one counts)
> solutions, each of which solve an interpretation of your original
> problem, neither of which involve more than 3 lines of fairly
> clean code.  Perhaps a little more context regarding what you
> *want* to do would help.  However, I suspect that answer is
> "there is no *cleaner* way to do it".
>
> Unless you're modifying an existing list that is referenced
> elsewhere, the reassignment (l = [x for x in l ...]) solution
> should work just fine.  Thus, unless you have a situation akin to:
>
> 	g = l
> 	l = [x for x in l if x.lower() not in s]
> 	assert(thing_from_s not in g)
>
> then just reassign "l".  If not, use the loop.  It's that easy
> and clean.  Don't try to opaquify it by collapsing it further.
> Perhaps, if your loop is messy, use my clean loop suggestion.
> 
> -tkc



From sjmachin at lexicon.net  Wed Nov  1 21:28:46 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Nov 2006 18:28:46 -0800
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
References: <eib0la$86i$1@newslocal.mitre.org>
	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>
	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
Message-ID: <1162434526.601605.315560@k70g2000cwa.googlegroups.com>


Tom Plunket wrote:
> John Machin wrote:
>
> > If you were to write 'c:\temp\book1.csv', it would blow up ... because
> > \t -> tab and \b -> backspace. Get into the habit of *always* using raw
> > strings r'C:\Temp\Book1.csv' for Windows file names (and re patterns).
> > You could use double backslashing 'C:\\Temp\\Book1.csv' but it's
> > uglier.
>
> ...alternatively you can just use 'unix slashes', e.g.
> 'c:/temp/book1.csv', since those work just fine 'cause the Windows
> APIs deal with them properly.

Not all APIs do the right thing. If you fire up the cmd.exe shell and
feed it slashes as path separators, it barfs. Example:
    C:\junk>dir c:/junk/*.bar
    Invalid switch - "junk".
Hence the advice to use rawstrings with backslashes -- they work under
all circumstances.



From svein at seldal dot com  Thu Nov 16 18:22:20 2006
From: svein at seldal dot com (Svein Seldal)
Date: Fri, 17 Nov 2006 00:22:20 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <ejhuom$gi4$1@news.albasani.net>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
	<7vCdnSqE260grc7YRVnzvQ@telenor.com>
	<eivuh3$tk2$1@news.albasani.net>
	<Y7idna2l5tQXIcTYRVnzvA@telenor.com>
	<ejhuom$gi4$1@news.albasani.net>
Message-ID: <LL-dnSzcEqMtb8HYRVnzvA@telenor.com>

robert wrote:

> Forget all the low level PyGIL... functions.'

Quite the contrary, I would say!

 From the Py C API doc, I interpret the PyGIL... functions to be higher 
leveled than eg. PyEval_SaveThread(). I've checked into the source of 
python to find out what's really going on, and I've learnt a couple of 
interesting facts. The PyGIL... are helper functions build over the 
PyEval... functions, not the other way around.

A real beauty about the PyGILState_Ensure() is the fact that if it's 
called from a thread that is (yet) unknown to python, it will actually 
create the thread state object for you (with PyThreadState_New) and 
acquire the lock. Hence, I dont have to worry about the process of 
swapping thread states with PyEval_xxxThread() functions. I ONLY need to 
use PyGILState_Ensure() prior to any py-ops.

 From my previous post, I asked about the difference between 
PyEval_ReleaseLock() and PyEval_ReleaseThread() and I've found one major 
difference. Both release the GIL as the docs states, but the 
PyEval_ReleaseThread() saves the current thread state as well. When I 
used PyEval_ReleaseLock() this didnt happen, preventing proper saving of 
the current thread, causing py crash when control were handed back to 
this thread.

By using:

	PyEval_InitThreads();
	py_ops();
	PyThreadState *pts = PyGILState_GetThisThreadState();
	PyEval_ReleaseThread(pts);

And for each py-op later on (from arbitrary thread):

	PyGILState_STATE gstate;
	gstate = PyGILState_Ensure();
	py_ops();
	PyGILState_Release(gstate);

Then you're home free. Everything related to threading is handled by 
Py/API itself.

> Probably you just do a PyRun_xxxx in main thread and then everything 
> else in Python, and expose C-parts for the thread-loop to Python as 
> function (in other_py_inits) - where in the c-function you probably have 
> the usual Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS  bracket during 
> time consuming/system/reenter-endangered message stuff.

The app i'm building is a plugin to a server system, and I cant control 
nor remove any threads that the server uses. I am given one main thread 
to run python forever, and messages that are to be delivered into python 
are called from another.

I could do it like you propose: The data coming from my server will 
arrive into a c-function called by a server thread. The c-part of the 
thread-loop would then be run as another thread (started from  python). 
Its fully feasible, yet the challenge is to make proper data sync-ing 
between these two threads.

Well, I think I've achieved what I wanted. Python seems apparently 
stable, and reading from the python sources, I cant see any immediate 
reasons why it shouldn't.

Thanks for letting me closer to a working solution!


Regads,
Svein


From deets at nospam.web.de  Thu Nov  9 17:56:20 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Nov 2006 23:56:20 +0100
Subject: Simple question to split
In-Reply-To: <4rhpvgFrneqhU2@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
	<4rhpvgFrneqhU2@mid.uni-berlin.de>
Message-ID: <4rhq0jFrneqhU3@mid.uni-berlin.de>

Diez B. Roggisch schrieb:
> Matthias Winterland schrieb:
>> Hi,
>>
>> I have a simple question. When I read in a string like:
>> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
>> single split-call?
> 
> Nope. But you could replace the commas with spaces, and then split.

Or use re.split....

Diez


From spe.stani.be at gmail.com  Wed Nov 29 09:49:57 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 29 Nov 2006 06:49:57 -0800
Subject: Stani's Python Editor is looking for a new webhost
Message-ID: <1164811797.717948.147530@16g2000cwy.googlegroups.com>

SPE was hosted for a long while by Zettai. I'd like to thank them again
for their wonderful service. Unfortunately they will go out of
business. So SPE is looking for a new webhost.

These are the requirements:
- python framework (Zope/Plone, django, turbogears, ...)
- I have the freedom to use this website also for other projects
besides SPE (such as sdxf (open source dxf library for python), my own
portfolio, ...
- I am allowed to place ads on the site (eg Google Adsense)

These are some optional features which would be nice:
- root access
- debian or ubuntu based
- domain registration for stani.be

In return a small banner of the hosting (or sponsering) will be placed
on the SPE site. You can reach me by email: spe.stani.be  at gmail. The
SPE website gets around 1500 visitors a day.

If there are some zope/plone, django, turbogears, ... enthousiasts or
companies want to help building the site, please contact me as well.

Every offer will be appreciated, but of course I can only choose one.

In order to continue the development of SPE, it needs a hosting
provider. 

Thanks for any suggestions,

Stani



From chris at kateandchris.net  Tue Nov  7 16:36:38 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Tue, 7 Nov 2006 16:36:38 -0500
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov  7)
In-Reply-To: <4550f7b9$0$14445$c3e8da3@news.astraweb.com>
References: <eiqr89$20d$1@lairds.us>
	<4550f7b9$0$14445$c3e8da3@news.astraweb.com>
Message-ID: <20061107213638.GB6506@kateandchris.net>

On Tue, Nov 07, 2006 at 04:15:39PM -0500, John Salerno wrote:
> Cameron Laird wrote:
> 
> >     Fredrik Lundh collects pyidioms:
> > 	http://effbot.org/zone/python-lists.htm
> 
> Not working?
perhaps http://effbot.org/zone/python-list.htm ?



From paul at boddie.org.uk  Sat Nov 25 10:43:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 25 Nov 2006 07:43:27 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
	<mailman.703.1164432447.32031.python-list@python.org>
Message-ID: <1164469407.937514.190400@l39g2000cwd.googlegroups.com>

Jerry Hill wrote:
> > MontyLingua is GPL software and thus has its own licensing issues for
> > commercial software.

MontyLingua might appear to be GPL-licensed, but then the author puts
some kind of non-commercial clause on top, either thinking that's what
the GPL is all about (out of confusion, perhaps), or believing that he
can limit the rights of the those who license his code. The effect is
that the code is not actually GPL-licensed at all, given the stated
conditions on distribution. See here for more discussion:

http://lists.debian.org/debian-legal/2004/08/msg00622.html

Paul

P.S. This obsession in academia for non-commercial licences is quite a
destructive force: everyone "protects" their own work yet steers clear
of other people's work, redoing what they need themselves, mostly
because they've got an eye on "monetizing" that work later on.
Consequently, the cult of the almighty dollar gets more out of it than
scientific progress does.



From timr at probo.com  Tue Nov 28 02:39:00 2006
From: timr at probo.com (Tim Roberts)
Date: Tue, 28 Nov 2006 07:39:00 GMT
Subject: splitting a long string into a list
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
Message-ID: <2qpnm2984p6q76vd9p1jhj65if9ri5eva1@4ax.com>

"ronrsr" <ronrsr at gmail.com> wrote:

>I have a single long string - I'd like to split it into a list of
>unique keywords. Sadly, the database wasn't designed to do this, so I
>must do this in Python - I'm having some trouble using the .split()
>function, it doesn't seem to do what I want it to - any ideas?
>
>thanks very much for your help.
>
>r-sr-
>
>
>longstring = 'Agricultural subsidies; Foreign aidAgriculture;
>Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
>Childhood Development, Birth Defects; Toxic ChemicalsAntibiotics,
>AnimalsAgricultural Subsidies, Global TradeAgricultural
>SubsidiesBiodiversityCitizen ActivismCommunity...

What do you want out of this?  It looks like there are several levels
crammed together here.  At first blush, it looks like topics separated by
"; ", so this should get you started:

  topics = longstring.split("; ")
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From steve at holdenweb.com  Fri Nov 10 03:00:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 02:00:16 -0600
Subject: how is python not the same as java?
In-Reply-To: <87k624j622.fsf@benfinney.id.au>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>	<ej0se4$jt9$1@sea.gmane.org>
	<87k624j622.fsf@benfinney.id.au>
Message-ID: <ej1bge$on6$1@sea.gmane.org>

Ben Finney wrote:
> Steve Holden <steve at holdenweb.com> writes:
> 
>> Java is horrible, Oython is not.
> 
> Is that the predecessor to Python, the one that could only be
> expressed in vowel noises?
> 
You're taking the oiss, right?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From eric_brunel at despammed.com  Fri Nov 10 03:11:46 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 10 Nov 2006 09:11:46 +0100
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<slrnel6vs2.17k.wojciech_mula@cat.tac>
	<1163112691.552233.130650@e3g2000cwe.googlegroups.com>
Message-ID: <op.tisjpwkrrqur0o@eb.pragmadev>

On Thu, 09 Nov 2006 23:51:31 +0100, Dan Lenski <dlenski at gmail.com> wrote:

> One other thing I'm wondering: how exactly does Tkinter work?  Is the
> whole Tk toolkit bound up as library of low-level C code, or does
> Tkinter sit on top of a Tcl interpreter?

The latter: there is a tiny C layer allowing Python to call an embedded  
tcl interpreter.

> If the latter, that might explain why it is frustratingly slow on
> Cygwin... since Cygwin is not very good at starting up new processes in
> a timely manner.

There is no other process involved: the interpreter is embedded, just as a  
Python interpreter can be embedded in a C application. If you want to work  
with Tkinter on Windows, you'd better avoid Cygwin. Python with Tkinter  
works just fine on Windows, just as it works on any other platform, and is  
fully portable, just as tcl/tk is.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From jfigueiras at sapo.pt  Wed Nov 22 07:40:48 2006
From: jfigueiras at sapo.pt (jfigueiras at sapo.pt)
Date: Wed, 22 Nov 2006 12:40:48 +0000
Subject: Capture file descriptors while running an external program
Message-ID: <1164199248.3lj9jkctog8w@w3.mail.sapo.pt>

Hi all!

I have a problem with the module subprocess!
The problem is that the external software that I am running under
subprocess.Popen opens stdin, stdout, stderr, and other file descriptors to
write and read in the hard drive.
I know how to capture stdin, stdout and stderr, what I cannot do is to capture
the other file-descriptors. Is there any way to wrap those non-standard file
descriptors and make them write and read from a specific object that I define?
I know that I can use tmp files to do that, but i would like something running
without tmp files.

Regards...
Joao

___________________________________________________________________

O SAPO j? est? livre de v?rus com a Panda Software, fique voc? tamb?m!
Clique em: http://antivirus.sapo.pt



From steve at holdenweb.com  Fri Nov  3 22:50:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Nov 2006 03:50:11 +0000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eigg0r$3u7$2@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>	<eifhf3$mmh$1@news.albasani.net>
	<eifmgv$r37$1@news.sap-ag.de>	<eiftcg$968$1@news.albasani.net>
	<eifuk1$2ks$1@news.sap-ag.de> <eigg0r$3u7$2@news.albasani.net>
Message-ID: <eih2jc$2lf$1@sea.gmane.org>

robert wrote:
> Daniel Dittmar wrote:
> 
>>robert wrote:
[...]
> 
>>>garbage is collected earliest, when the refcount went to 0. If it ever 
>>>went to 0, no one will ever use such object again. Thus GC should not 
>>>be different at all.
>>
>>Since Python 2.?, there's a mark-and-sweep garbage collection in 
>>addition to the reference counting scheme. This was put into Python to 
>>be able to reclaim object cycles.
> 
> 
> still that only walks on objects which have already zero refcount. Cannot imagine any additional problems with the GIL.
> 
If I understand you correctly, then you are suffering a misapprehension. 
Any object whose reference count goes to zero will immediately be 
reclaimed. The mark-sweep garbage collector is used to detect objects 
that are taking part in cycles - sets of objects that only refer to each 
other without being bound to a name in any current namespace or to any 
container object bound to such a name.

In other words, it detects (and reclaims) objects with non-zero 
reference counts which nevertheless can be reclaimed without ill effect 
on the program.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From hg at nospam.com  Wed Nov 22 13:53:19 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 12:53:19 -0600
Subject: utf - string translation
In-Reply-To: <mailman.605.1164221562.32031.python-list@python.org>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
Message-ID: <O319h.1989$%_2.110@newsfe19.lga>

Fredrik Lundh wrote:
> hg wrote:
> 
>> We noticed that len('?') != len('a')
> 
> sounds odd.
> 
>>>> len('?') == len('a')
> True
> 
> are you perhaps using an UTF-8 editor?
> 
> to keep your sanity, no matter what editor you're using, I recommend
> adding a coding directive to the source file, and using *only* Unicode
> string literals for non-ASCII text.
> 
> or in other words, put this at the top of your file (where "utf-8" is
> whatever your editor/system is using):
> 
>    # -*- coding: utf-8 -*-
> 
> and use
> 
>    u'<text>'
> 
> for all non-ASCII literals.
> 
> </F>
> 

Hi,

The problem is that:

# -*- coding: utf-8 -*-
import string
print len('a')
print len('?')

returns 1 then 2

and string.maketrans(str1, str2) requires that len(str1) == len(str2)

hg







From st at tobiah.org  Fri Nov  3 17:01:35 2006
From: st at tobiah.org (tobiah)
Date: Fri, 03 Nov 2006 14:01:35 -0800
Subject: WSDL?
In-Reply-To: <1162590557.043667.20130@m73g2000cwd.googlegroups.com>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<1162590557.043667.20130@m73g2000cwd.googlegroups.com>
Message-ID: <454baf57$0$12123$88260bb3@free.teranews.com>

I recently wrote a SOAP client(?) to read what the guy from
the other company called a WSDL, which was just a URL that
served an XML API description.  Is that the same as XMLRPC
(I ask because you mention SOAP).

Thanks,

Toby

WakeBdr wrote:
> XMLRPC and SOAP are the two I'm working with right now.
> 
> 
> tobiah wrote:
>> Is WSDL the right answer for in house communication
>> between programs written in different languages, or
>> is it more for publishing interfaces for use by parties
>> outside your own company?
>>
>> What else is available for sharing complex structures
>> with processes running programs that were written in
>> other languages?
>>
>> Thanks,
>>
>> Toby
>>
>> -- 
>> Posted via a free Usenet account from http://www.teranews.com
> 

-- 
Posted via a free Usenet account from http://www.teranews.com



From XX.XmcX at XX.XmclaveauX.com  Wed Nov  1 00:30:14 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Wed, 01 Nov 2006 06:30:14 +0100
Subject: Integrating Python with Fortran
References: <1162329971.939178.290250@m7g2000cwm.googlegroups.com>
Message-ID: <mn.09867d6b38233983.46195@XX.XmclaveauX.com>

Hi!

in afternoon: http://calcul.math.cnrs.fr/article.php3?id_article=150

-- 
@-salutations

Michel Claveau




From antroy at gmail.com  Fri Nov 10 06:01:40 2006
From: antroy at gmail.com (Ant)
Date: 10 Nov 2006 03:01:40 -0800
Subject: Newb: installing Jython on Windows XP ...
In-Reply-To: <mailman.2030.1163154606.11739.python-list@python.org>
References: <1163095323.668867.58320@i42g2000cwa.googlegroups.com>
	<mailman.2030.1163154606.11739.python-list@python.org>
Message-ID: <1163156500.758696.258390@m7g2000cwm.googlegroups.com>



On 10 Nov, 10:29, Marcus Bajohr <Baj... at hadakon.de> wrote:
> donkeyboy wrote:
> > All,
>
> > I'm having issues installing Jython on Windows XP. I've looked on the
...
> > Any help would be of great use!!!
> Try it from cmd, not from the cygwin shell.
> The environments differ !

Looking at the command prompt, he's not in the cygwin shell. I think
that there's a bug in the latest jre from sun. I installed the 1.5.0_09
update a few days ago, and I can't get any apps to run with it
(including irritatingly the Java Control Panel application so I can't
change the default back easily...) The problems are
NoClassDefFoundError's as well, so I wonder if the class loading is
broken in that release...

Anyway the solution seems to be to use an earlier jre explicitly:

"c:\Program Files\Java\jdk1.5.0_06\bin\java.exe" jython-21

1.5.0_06 seems to work fine for me.

HTH



From stefan.behnel-n05pAM at web.de  Wed Nov 22 09:32:51 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Nov 2006 15:32:51 +0100
Subject: XML Validation in Python using XSV
In-Reply-To: <1164202262.974495.289490@f16g2000cwb.googlegroups.com>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
	<45644E9A.3030209@web.de>
	<1164202262.974495.289490@f16g2000cwb.googlegroups.com>
Message-ID: <45645F93.7050907@web.de>

> bmichel at gmail.com wrote:
> Stefan Behnel wrote:
>> BTW: any reason you need to use XSV? There are some other libraries out there
>> that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
>> much more powerful than XSV.
>
> No particular reason for XSV
> I just want to validate XML files against an XML schema through Python.
> If you can suggest any other package for debian, I'll be glad to try
> it.

Well, as I said:

http://packages.debian.org/unstable/python/python-lxml
http://codespeak.net/lxml/

Just try "apg-get install python-lxml".

Stefan


From tleeuwenburg at gmail.com  Thu Nov 23 19:28:14 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 23 Nov 2006 16:28:14 -0800
Subject: The Python Papers -- letters to the editor
Message-ID: <1164328094.918889.62230@k70g2000cwa.googlegroups.com>

If anyone would like their comments to appear in The Python Papers, we
will need to get your permission to use them under the Creative Commons
2.5 license subject to Noncommercial, Attribution and Share-Alike
conditions. For this reason, we request that letters to the editor be
emailed to letters at pythonpapers.org, indicating an acceptance of this
agreement.

Cheers,
-T
(Editor-In-Chief)



From salmoni at gmail.com  Tue Nov 14 09:36:28 2006
From: salmoni at gmail.com (Alan J. Salmoni)
Date: 14 Nov 2006 06:36:28 -0800
Subject: Programmatically finding "significant" data points
In-Reply-To: <ejcjcq$kph$01$1@news.t-online.com>
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
	<ejcjcq$kph$01$1@news.t-online.com>
Message-ID: <1163514988.269564.293440@b28g2000cwb.googlegroups.com>

If the order doesn't matter, you can sort the data and remove x * 0.5 *
n where x is the proportion of numbers you want. If you have too many
similar values though, this falls down. I suggest you check out
quantiles in a good statistics book.

Alan.

Peter Otten wrote:

> erikcw wrote:
>
> > Hi all,
> >
> > I have a collection of ordered numerical data in a list.  The numbers
> > when plotted on a line chart make a low-high-low-high-high-low (random)
> > pattern.  I need an algorithm to extract the "significant" high and low
> > points from this data.
> >
> > Here is some sample data:
> > data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> > 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> > 0.10]
> >
> > In this data, some of the significant points include:
> > data[0]
> > data[2]
> > data[4]
> > data[6]
> > data[8]
> > data[9]
> > data[13]
> > data[14]
> > ....
> >
> > How do I sort through this data and pull out these points of
> > significance?
>
> I think you are looking for "extrema":
>
> def w3(items):
>     items = iter(items)
>     view = None, items.next(), items.next()
>     for item in items:
>         view = view[1:] + (item,)
>         yield view
>
> for i, (a, b, c) in enumerate(w3(data)):
>     if a > b < c:
>         print i+1, "min", b
>     elif a < b > c:
>         print i+1, "max", b
>     else:
>         print i+1, "---", b
> 
> Peter



From weekender_ny at yahoo.com  Tue Nov 21 23:38:49 2006
From: weekender_ny at yahoo.com (John)
Date: 21 Nov 2006 20:38:49 -0800
Subject: filling forms automatically generated using javascript
Message-ID: <1164170329.515873.311900@h48g2000cwc.googlegroups.com>


Is there an automatic way of filling forms that have been generated
using javascript?
I tried to use python+mechanize but am having trouble with javascript
forms.

This is the way the form is created:

<script
src="/WebResource.axd?d=uz45jgd0NVyzsVJV_sZDrjxBvvX2yHd3hs2IGgfXLN3pPD65PTl8Gec4qFJa35leX_j-S-HQNzQg1sDk82eQYafpf0w9zI7HaoMUnMjb9ihQ96Tf0qvT-Air__85j5db0&amp;t=632972974720000000"
type="text/javascript"></script>



Thanks in advance for your help,
--j



From steve at ferg.org  Sat Nov 25 22:47:17 2006
From: steve at ferg.org (Steve)
Date: 25 Nov 2006 19:47:17 -0800
Subject: Python 2.5 idle and print command How do I suppress a line feed?
References: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>
Message-ID: <1164512837.555705.186620@l39g2000cwd.googlegroups.com>

See
http://www.ferg.org/projects/python_gotchas.html#contents_item_4



From apardon at forel.vub.ac.be  Tue Nov 14 07:01:05 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Nov 2006 12:01:05 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
Message-ID: <slrneljc00.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-13, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
> Michael Hobbs <mike at hobbshouse.org> writes:
>
>> To be clear, this is the actual thrust of my argument. It seems
>> redundant to have *both* line continuations and colons in compound
>> statements.
>
> Why are you trying to remove redundancy?

Why not? My impression is that removing redundancy is considered
a positive thing here in c.p.l.

> The language is designed for
> communication between people (programmers) primarily. Redundancy is
> often the best way to be explicit and readable.

Except if you argue for blockmarkers. Then you get the response
that indentation is clear enough and such markers are redundant.

And there have been other subjects where redundancy was seen
as something negative.

-- 
Antoon Pardon


From fredrik at pythonware.com  Thu Nov  2 11:01:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 17:01:04 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162478431.624590.29290@m7g2000cwm.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>
	<1162478431.624590.29290@m7g2000cwm.googlegroups.com>
Message-ID: <eid4nu$ldi$2@sea.gmane.org>

elderic wrote:

> I just wanted to know if there was a keyword for functions, too.
> 
> Then u could've done: type(f) is function
> quite similar to: type(x) is int

but why do you think you need that, when you have callable() ?  unless 
you're doing specialized stuff, there's really no reason to distinguish 
between function objects and other callables.

</F>



From bj_666 at gmx.net  Thu Nov  9 06:28:25 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 09 Nov 2006 12:28:25 +0100
Subject: Sorted list - how to change it
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
	<pan.2006.11.09.10.05.13.352443@gmx.net>
Message-ID: <pan.2006.11.09.11.28.23.20546@gmx.net>

In <pan.2006.11.09.10.05.13.352443 at gmx.net>, Marc 'BlackJack' Rintsch
wrote:

> lst = [1, 2, 3, 4, 5]
> tmp = list(lst)
> while lst == tmp:
>     random.shuffle(lst)

Argh, that fails if the list is empty or contains just one item.

lst = [1, 2, 3, 4, 5]
if len(lst) > 1:
    tmp = list(lst)
    while lst == tmp:
        random.shuffle(lst)

Ciao,
	Marc 'BlackJack' Rintsch



From i80and at gmail.com  Tue Nov  7 14:39:47 2006
From: i80and at gmail.com (i80and)
Date: 7 Nov 2006 11:39:47 -0800
Subject: Character encoding
In-Reply-To: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
References: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
Message-ID: <1162928387.620610.31290@h48g2000cwc.googlegroups.com>

I would suggest using string.replace.  Simply replace '&nbsp' with ' '
for each time it occurs.  It doesn't take too much code.

On Nov 7, 1:34 pm, "mp" <mailpitc... at email.com> wrote:
> I have html document titles with characters like &gt;, &nbsp;, and
> &#135. How do I decode a string with these values in Python?
> 
> Thanks



From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 29 19:38:32 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 30 Nov 2006 11:38:32 +1100
Subject: for i in range() anti-pattern [was Re: trouble writing results to
	files]
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
Message-ID: <pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>

On Wed, 29 Nov 2006 17:00:30 +0100, Fredrik Lundh wrote:

> Neil Cerutti wrote:
> 
>>> BTW, iterating over range(len(a)) is an anti-pattern in Python.
>> 
>> Unless you're modifying elements of a, surely?
> 
> and needs to run on a Python version that doesn't support enumerate.

This isn't meant as an argument against using enumerate in the common
case, but there are circumstances where iterating with an index variable
is the right thing to do. "Anti-pattern" tends to imply that it is always
wrong.

The advantage of enumerate disappears if you only need to do something to
certain items, not all of them:

>>> alist = list("abcdefghij")
>>> for i in xrange(3, 7, 2):
...     print i, alist[i]
...
3 d
5 f

Nice and clear. But this is just ugly and wasteful:

>>> for i,c in enumerate(alist):
...     if i in xrange(3, 7, 2):
...             print i, c
...
3 d
5 f

although better than the naive alternative using slicing, which is just
wrong:

>>> for i,c in enumerate(alist[3:7:2]):
...     print i, c
...
0 d
1 f

The indexes point to the wrong place in the original, non-sliced list, so
if you need to modify the original, you have to adjust the indexes by hand:

>>> for i,c in enumerate(alist[3:7:2]):
...     print 2*i+3, c
...
3 d
5 f

And remember that if alist is truly huge, you may take a performance hit
due to duplicating all those megabytes of data when you slice it. If you
are modifying the original, better to skip making a slice.

I wrote a piece of code the other day that had to walk along a list,
swapping adjacent elements like this:

for i in xrange(0, len(alist)-1, 2):
    alist[i], alist[i+1] = alist[i+1], alist[i] 


The version using enumerate is no improvement:

for i, x in enumerate(alist[0:len(alist)-1:2]):
    alist[i*2], alist[i*2+1] = alist[i*2+1], x


In my opinion, it actually is harder to understand what it is doing.
Swapping two items using "a,b = b,a" is a well known and easily recognised
idiom. Swapping two items using "a,b = b,c" is not.


-- 
Steven.



From copiernik at wp.pl  Fri Nov 10 16:05:16 2006
From: copiernik at wp.pl (consternation)
Date: Fri, 10 Nov 2006 22:05:16 +0100
Subject: newbee I have an object how to check what's his class?
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
	<1163171613.040825.78290@m73g2000cwd.googlegroups.com>
	<ej2b34$9nk$1@ultra60.mat.uni.torun.pl>
	<pan.2006.11.10.17.13.58.663930@gmx.net>
Message-ID: <ej2pic$ore$1@ultra60.mat.uni.torun.pl>


I think I know now where my problems come from. I spare you boring 
implementation code.
The case look like this: I parse xml file something a like
 <X id="0">
    <a>1   <\a>
    <a> 2  <\a>

    <X id="1">
        <a>3 <\a>
        <b> 4<\b>
    <\X>
</X>

<X id="2">
    <a>   <\a>
    <a>   <\a>

    <X id="3">
        <a> <\a>
        <b> <\b>
    <\X>
</X>
I  succesfully constructlop-level X objects - I see all components when i 
print X0, X1 out with _repr_.
I store my X's in memory. I had some problems with this. I googled, red 
newsgoup ad foud a solution that seemd to be perfect for me (...till now). 
In the parser- Y class a have a dictionary
def __init__
 self.mem={}
I googled a way how  to add elements to dict,  I have read the code not the 
description below
##copied from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66516
   def addItem(self,word,pagenumber):
        self.mem.setdefault(word,[]).append(pagenumber)
                                   ^^^^^^^^
So my dict looks like{
(id of top-level X)  0 :  (the X itself) X0,
            2     :    X2,
            4..........
}
I wrote it some time and I was tired I haven't pay attention to  the 
breackets at he beginning of outprint
TOP LEVEL X WITH ID=0
[<class  X> <----
<a>1<\a>
<a>2<\a>
        <class  X>
        <a >3<\a>
        <a> 4<\a>
       <\class  X>
<\class  X>]
One can clearly see it's a list :( Shame on me.
I did a trick. If my X object is stored in a list and it's the only element 
of the list I can simply use it like:
                print v[0]
                print" isinstance(x,X)"
                print isinstance(v[0],X)
                print "type(x) is X"
                print type(v[0]) is X
                print v[0].__class__
                print v[0].__class__.__name__
and results
<class  X> <----no [!!!!
<a>1<\a>
<a>2<\a>
        <class  X>
        <a >3<\a>
        <a> 4<\a>
       <\class  X>
<\class  X>

isinstance(x,X)
True                :-)
type(x) is X
False                :( ??
__main__.X
X
 temporarily it solves my probblems I'm just curious why type can't handle 
the test.
Thank you for help, and making me think :-) 




From icebergwtf at yahoo.com.cn  Thu Nov  9 20:58:49 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Fri, 10 Nov 2006 09:58:49 +0800 (CST)
Subject: Simple question to split
Message-ID: <20061110015849.99229.qmail@web15014.mail.cnb.yahoo.com>

Matthias Winterland wrote:
> Hi,
>
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
> single split-call?
>
> Thx,
> Matthias

Sorry, I didn't notice there are spaces between 5 6 7 :{P
here is new code:
>>> a = "1,2,3,4,5 6 7,3,4"
>>> l = [int(n) for n in a.replace(' ',',').split(',')]
>>> l
[1, 2, 3, 4, 5, 6, 7, 3, 4]
>>>

wutiefeng
2006-11-10


		
___________________________________________________________ 
????????-3.5G???20M??? 
http://cn.mail.yahoo.com


From dakman at gmail.com  Mon Nov 13 13:11:08 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 13 Nov 2006 10:11:08 -0800
Subject: Is python for me?
In-Reply-To: <mbmm24-48f.ln1@lairds.us>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
Message-ID: <1163441468.081643.189600@f16g2000cwb.googlegroups.com>

As stated above python is capable of all those things, however on
larger applications like that it can tend to slow down a bit. And the
executables do need a little bit of work, because it's bassicly a dll
and a library of all your .pyc files. However python is still a great
language and I would recomend it. And most of these things will
probably be fixed in Python 3000!
Cameron Laird wrote:
> In article <1163437873.721254.31070 at b28g2000cwb.googlegroups.com>,
> lennart <l.m.aangeenbrug at gmail.com> wrote:
> >Hi,
> >
> >I'm planning to learn a language for 'client' software. Until now, i
> >'speak' only some web based languages, like php. As a kid i programmed
> >in Basic (CP/M, good old days :'-) ) Now i want to start to learn a
> >(for me) new computer language.
> >
> >I like Python. Its free, easy to learn and some favorite programs of my
> >are written in Python / can understand Python (like OpenOffice) etc.
> >
> >But I'm not a full-time programmer. I know, that I've only time &
> >possibility to learn one (= 1) language good. So i ask myself is python
> >the language I'm looking for?
> >
> >In the future, i want to write the following applications:
> >[*] A database driven program, which can handle my clients, tasks and
> >places (= 3 tables, has to work relative with each other). I think,
> >this isn't a problem for Python
> >[*] As a photographer i like to build a picture management system (also
> >db) with raw support. Raw is the raw-data from the sensor of the
> >camera. My questions:
> >- can python encode raw?
> >- can python head for a utility like dcraw?
> >- or head for a utility like IrfanView (delphi?) or something like
> >that?
> 			.
> 			.
> 			.
> Yes.
>
> Yes, Python is generally capable in all the roles you describe.
> Perhaps most exciting, though, is that you can try out the
> language yourself, TODAY, over the next few hours, and, in no
> more time than that, get a realistic if limited idea how it's
> likely to work for you.  With the right introduction <URL:
> http://docs.python.org/tut/ > you can be coding usefully in
> Python very quickly.



From no-spam at no-spam-no-spam.invalid  Wed Nov  8 11:40:39 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 08 Nov 2006 17:40:39 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162947569.228388.16940@m7g2000cwm.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162947569.228388.16940@m7g2000cwm.googlegroups.com>
Message-ID: <eit1ab$q9j$1@news.albasani.net>

Sandra-24 wrote:
> On Nov 2, 1:32 pm, robert <no-s... at no-spam-no-spam.com> wrote:
>> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
>>
>> Interprocess communication is tedious and out of question, so I thought about simply using a more Python interpreter instances (Py_NewInterpreter) with extra GIL in the same process.
> 
> Why not use IronPython? It's up to date (unlike Jython), has no GIL,
> and is cross-platform wherever you can get .NET or Mono (UNIX, macs,
> windows) and you can use most any scientific libraries written for the
> .NET/Mono platform (there's a lot) Take a look anyway.
> 
> -Sandra

what about speed. Is it true that IronPython is almost as fast as C-Python meanwhile?

When this all is really true, its probably a proof that putting out LOCK-INC-lock's (on dicts, lists, mutables ...) in CPython to remove the GIL in future should not be really so expensive as it was teached in the past :-) 

Still to adopt to .NET libraries will be a big step. Is there really a thing out there as usable as numpy/scipy. And GUI programming in IronPython ...


( The FAQ's on codeplex.com and many docs are not readable currently due to site errors. What about overall stability and # of users of Iron as of today? )


-robert



From inq1ltd at verizon.net  Sun Nov  5 11:51:45 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 05 Nov 2006 11:51:45 -0500
Subject: disabledforeground or similar for Entry (in Tkinter)
In-Reply-To: <200611041952.07546.inq1ltd@verizon.net>
References: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
	<200611041952.07546.inq1ltd@verizon.net>
Message-ID: <200611051151.45268.inq1ltd@verizon.net>

Since others want to see more,


Try this, you can make the changes you want to the 
look of your final output with grid or 
pack_forget() . 

root = Tk()
class Ktest:
    def __init__(self):
        self.Ftest1()

    def  Ftest1(self):
        try:    
            self.test2.grid_forget()
        except AttributeError :
            pass    
        self.test1 = Button(root, text='Push #1
                          button', bg = 'yellow',
                          width = 25,
                          command = self.Ftest2,
                          height = 25)
        self.test1.grid(row=0, column=0)


    def Ftest2(self):
       self.test1.grid_forget()

       self.test2 = Button(root, text='Push #2
                         button', bg = 'green',
                         width = 25,
                         command = self.Ftest1,
                         height = 8)
       self.test2.grid(row=0, column=0)
if __name__==  '__main__' :
    Ktest()
    mainloop()


jim-on-linux

http://www.inqvista.com

> On Saturday 04 November 2006 11:03, Dustan 
wrote:
> > Back in this post, I attempted to make a
> > label look like a button:
> > http://groups.google.com/group/comp.lang.pyth
> >on
> > /browse_thread/thread/a83195d3970a6851/2053cb
> >aec
> > 1bc1f19?auth=DQAAAHkAAAAMDAWnhNnzpuKlwOKZUwAG
> >UTt
> > T2Ay-EAB7rCY6SnwfnDzZ98M37bZDW2Is0LrBVrr8XEgP
> >fcu
> > OkiUE-CrSsKbBSX-67voDUXfbATBd0eYNMClezby4EXT2
> >fuL
> > m6f0llJ_xMO8BfkjVho_7CZvlf_9tNGnJixTbq8zr21OD
> >ZBh ouQ
> >
> > Alright, I've learned my lesson - don't use a
> > new widget; modify the old one.
> >
> > Except the Entry widget doesn't have a
> > disabledforeground option. Neither does the
> > Text widget, but IDLE seems to accomplish
> > making a disabled Text look the same as an
> > enabled Text in the IDLE Help section.
> >
> > No, foreground (fg) and background (bg) don't
> > make a difference; it still changes the color
> > of the Entry widget upon disabling.
> >
> > There must be something I'm missing here...
>
> My previous post was hasty and we all know,
> "Haste makes waste."
>
> Try this;
>
> If you use wiget-01.pack_forget() or
> wiget-01.grid_forget(),  you can now build
> wiget-02 using wiget-02.pack or grid() for the
> same location.
>
> You can reinstall uninstalled wigets by using
> pack() or grid() again for those hidden wigets.
> However only after uninstalling for the wigets
> in those locations.
>
>
>
> root = Tk()
>
> test1 = Button(root, text='Test No.1 button',
> bg = 'yellow', width = 15, height = 10)
> test1.grid(row=0, column=0)
> test1.grid_forget()
>
>
> test2 = Button(root, text='Test #2 button', bg
> = 'green', width = 15, height = 10)
> test2.grid(row=0, column=0)
>
> mainloop()
>
>
> jim-on-linux
>
> http://www.inqvista.com


From djh at dgh-aalborg.dk  Thu Nov 30 18:45:22 2006
From: djh at dgh-aalborg.dk (Reynold)
Date: Thu, 30 Nov 2006 15:45:22 -0800
Subject: gratuity sharply
Message-ID: <000701c714da$39a6d790$5921aa4c@cfmapj>


"It's clear Brad is being a jerk. This blog is for people who want to think about how they manage people, projects, and risk. For me, project management planning is the identification of release criteria and other prose about the project. But we don't always have all the clues, as I didn't in this conversation. But by not asking for help earlier, I might cause that to happen.
I'm not sure why that was so hard to do. Is this a good time to talk?
Even when I edit, I add more. " If anyone asks about Brad's jerkiness problems, you say, "Brad has decided to pursue career opportunities elsewhere. And in most circumstances, I manage to straight-talk without hurting anyone, even myself. Even when I edit, I add more.
And some of us jump to conclusions quickly with the clues we have. But when I hook it up to my computer for scanning to a file, it falls apart.
I have a picture that I want to simplify but I don't know Omnigraffle well enough to do so. Ok, I quit all the applications and leave my computer alone to install.
Even when I edit, I add more.
And some of us jump to conclusions quickly with the clues we have. I now know how to do this for the next time.
Check out the Gifts with Purchase page too!
You create a lack of trust by commenting about other people. Implicit requirements are still requirements. But that wasn't the case earlier this week.
" We went on from there. I can do other things while I'm downloading.
Well, I'm only sort-of happy. So does the swapping back in, if it's been a long time since I last worked on this task.
Even though I managed to accomplish the tasks I needed, the time it took me to accomplish them and the foreign approach to the UI made me not happy.
I was ready to throw the damn thing out the window when I thought, "Huh, I bet other people have this problem.
If you're in flow, this is surprisingly high.
I was able to start scanning and save my files.
Luckily, Nice Person seemed to have taken it well.
Even though I managed to accomplish the tasks I needed, the time it took me to accomplish them and the foreign approach to the UI made me not happy.
Certainly, for some tasks, it's fairly trivial. So instead of making myself crazy trying to write more good stuff for you, I decided you should read these. Those implicit requirements are still requirements. And if you have to fire Brad, you say something like, "Brad has decided to pursue career opportunities elsewhere.
I started to download. Ok, I'm a smart person, I can figure this out. 
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From "svein at seldal dot com" at STARDUST.DNSALIAS.com  Wed Nov  8 14:16:44 2006
From: "svein at seldal dot com" at STARDUST.DNSALIAS.com (Svein Seldal)
Date: Wed, 08 Nov 2006 20:16:44 +0100
Subject: Delivering data to python from a c-thread
In-Reply-To: <mailman.1919.1163012125.11739.python-list@python.org>
References: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>	<mailman.1908.1163004405.11739.python-list@python.org>	<F9Gdnbl3uKqPhc_YRVnzvQ@telenor.com>
	<mailman.1919.1163012125.11739.python-list@python.org>
Message-ID: <20061108191627.B20DFC4A8@stardust.seldal.com>

Steve Holden wrote:

> OK. I was just thinking that, with Python threads, communication using 
> Queue.Queue is thread-safe and will handle the GIL, so that way you only 
> have the problem of how to synchronize your C code when it receives the 
> callback from the Python thread.

The python internal thread-safe problem is under control. I'm using 
twisted, so it already provide me with a thread-synchronization 
mechanism (the reactor.callFromThread() ).

The issue is rather the C sync-ing. I'm kind of new to multithreaded 
(pthreads) programming, so I'm not quite sure what exists of 
functionality and functions. So this is how I think of doing it:

Setup a mailbox or similar where the producing thread will deliver its 
message. This call to the mailbox should block until the consumer thread 
has received the message. My py thread will repeatedly call my 
C-handler. This C handler will wait (forever) for incoming messages from 
the producer. This should work, right?  I mean, this could even be 
implemented with flags/semaphores and let the data be transferred over 
ordinary common global variables.

Francly, I think the best solution would be to be able to call py from 
two independent c-treads!

Regads,
Svein Seldal



From siona at chiark.greenend.org.uk  Mon Nov  6 10:33:16 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 06 Nov 2006 15:33:16 +0000 (GMT)
Subject: Sorted and reversed on huge dict ?
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
Message-ID: <GtE*Vv9ur@news.chiark.greenend.org.uk>

 <vd12005 at yahoo.fr> wrote:
>so i just have tried, even if i think it will not go to the end => i
>was wrong : it is around 1.400.000 entries by dict...
>
>but maybe if keys of dicts are not duplicated in memory it can be done
>(as all dicts will have the same keys, with different (count) values)?

I've had programs handling dicts with 1.7million items and it isn't
a great problem, providing you're careful not to duplicate data.
Creating a copy of keys() in a separate list, for example, will
inflate memory usage noticably.

>memory is 4Gb of ram, [ ... ]

Unless you're on a 64bit OS, that's irrelevant. You'll hit the 2G
per-process limit before you start putting a strain on real memory.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From peter.maas at somewhere.com  Mon Nov 13 13:08:57 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Mon, 13 Nov 2006 19:08:57 +0100
Subject: explicit self revisited
In-Reply-To: <1163407870.637052.32760@m73g2000cwd.googlegroups.com>
References: <ej5fuv$a4a$1@online.de>
	<1163407870.637052.32760@m73g2000cwd.googlegroups.com>
Message-ID: <ejacbp$akr$1@online.de>

Michele Simionato wrote:
> Peter Maas wrote:
>> All these reasons are valid and retained by the following suggestion: let
>> self be represented by the dot <snip>
> 
> This suggestion has been discussed in the past (I remember having the
> same idea myself when I first learned Python). But at the end I believe
> the explicit 'self' is a better solution, because there are cases where
> it is useful to have it

Thanks, Michele. My intention wasn't to abandon explicit self but to replace
it by a shorter and unique entity. I searched a little for similar suggestions
in the past but didn't find them so I decided to post. I admit that my
suggestion was half-baked.

But at least I learned something: a heated debate isn't bound to become an
endless thread if the OP abstains from answering idiot replies ;)

--
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From shejo284 at gmail.com  Tue Nov  7 15:48:45 2006
From: shejo284 at gmail.com (Sheldon)
Date: 7 Nov 2006 12:48:45 -0800
Subject: C wrapper
In-Reply-To: <mailman.1853.1162932200.11739.python-list@python.org>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
	<mailman.1848.1162930804.11739.python-list@python.org>
	<1162931220.448328.108160@e3g2000cwe.googlegroups.com>
	<mailman.1853.1162932200.11739.python-list@python.org>
Message-ID: <1162932525.586346.324050@h48g2000cwc.googlegroups.com>


Gabriel Genellina skrev:

> At Tuesday 7/11/2006 17:27, Sheldon wrote:
>
> >Here is the file/module name: _msgpps_functions.c
> >Here is the initfunction:
> >
> >PyMODINIT_FUNC init_msgpps_functions(void) {
> >   PyObject* m;
> >   m=Py_InitModule("_msgpps_functions",_msgpps_functionsMethods);
> >   ErrorObject = PyString_FromString("_msgpps_functions.error");
> >   if(ErrorObject == NULL ||                                             \
> >      PyDict_SetItemString(PyModule_GetDict(m),"error",ErrorObject)!=0)
> >{
> >     Py_FatalError("Can't define _msgpps_functions.error");
> >     import_array();
> >   }     /*  access to Numeric PyArray functions */
> >}
> >
> >
> >I have not main() function in the file. Instead the main function is
> >called the same name:
> >
> >static PyObject* _msgpps_functions(PyObject* self, PyObject* args)
> >
> >Now I am new at this and I have been reading anything I can find. The
> >only thing that is out of place is the part which I didn't include:
> >
> >     /* Initialize the Python interpreter.  Required. */
> >     Py_Initialize();
> >
> >     /* Add a static module */
> >     initspam();
> >because I still don't understand this part.
>
> Are you *extending* Python with a new module written in C (you should
> be using the first part),
> or *embedding* python inside your application, mainly written in C
> (you would use something like the last code).
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar

Ok,

This I have done but still, the same error message. :(



From steve at REMOVEME.cybersource.com.au  Fri Nov 17 00:09:23 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 17 Nov 2006 16:09:23 +1100
Subject: How fuzzy is get_close_matches() in difflib?
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>

On Thu, 16 Nov 2006 20:19:50 -0800, John Henry wrote:

> I did try them and I am impressed.  It helped me found a lot of useful
> info.   I just want to get a feel as to what constitutes a "match".

The source code has lots of comments, but they don't explain the basic
algorithm (at least not in the difflib.py supplied with Python 2.3).

There is no single diff algorithm, but I believe that the basic idea is to
look for insertions and/or deletions of strings. If you want more
detail, google "diff". Once you have a list of differences, the closest
match is the search string with the fewest differences.

As for getting a feel of what constitutes a match, I really can't make any
better suggestion than just try lots of examples with the interactive
Python shell.



-- 
Steven D'Aprano 



From simonwittber at gmail.com  Mon Nov  6 19:41:41 2006
From: simonwittber at gmail.com (Simon Wittber)
Date: 6 Nov 2006 16:41:41 -0800
Subject: Python Distilled
In-Reply-To: <08Odnc6j7uKLxtLYnZ2dnUVZ_oydnZ2d@comcast.com>
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<08Odnc6j7uKLxtLYnZ2dnUVZ_oydnZ2d@comcast.com>
Message-ID: <1162860101.746321.73770@h54g2000cwb.googlegroups.com>

> http://www.python.org/dev/summary/2006-09-16_2006-09-30/#shrinking-python

Excellent, just what I was hoping for. Thanks!

-Sw.



From robert.kern at gmail.com  Sat Nov 11 07:09:49 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 11 Nov 2006 06:09:49 -0600
Subject: numpy/scipy: correlation
In-Reply-To: <ej4akj$vbe$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
Message-ID: <ej4eio$1fi$1@sea.gmane.org>

robert wrote:
> Is there a ready made function in numpy/scipy to compute the correlation y=mx+o of an X and Y fast: 
> m, m-err, o, o-err, r-coef,r-coef-err ?

numpy and scipy questions are best asked on their lists, not here. There are a
number of people who know the capabilities of numpy and scipy through and
through, but most of them don't hang out on comp.lang.python.

  http://www.scipy.org/Mailing_Lists

scipy.optimize.leastsq() can be told to return the covariance matrix of the
estimated parameters (m and o in your example; I have no idea what you think
r-coeff is).

-- 
Robert Kern

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



From steve at holdenweb.com  Wed Nov  1 21:35:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 02:35:53 +0000
Subject: re question
In-Reply-To: <eibipo$4pn$1@news2.rz.uni-karlsruhe.de>
References: <eibipo$4pn$1@news2.rz.uni-karlsruhe.de>
Message-ID: <eiblg3$6h4$1@sea.gmane.org>

Sch?le Daniel wrote:
> Hello all,
> 
> I didn't found more appropriate news group for
> this question, please let me know if there is ng with
> regular expression as its main topic
> 
> I am trying to construct a case where a greedy and
> non greedy operation produce different result.
> I dont see the difference between 'a??b' and 'a?b'
> As far I understand is that ? will first try to match a
> (it's greedy) and only if it fails then it step back
> and lets a unmatched. The other doesn't match a at first,
> only if the pattern fails to match it steps back and match a.
> 
> But don't they do eventually the same thing?
> Can someone provide an example where 2 patterns yield
> different results.
> 
  >>> target = "<h1>Sample String</h1>"
  >>> greedy = re.compile("<.+>")
  >>> nongreedy = re.compile("<.+?>")
  >>> m1 = greedy.match(target)
  >>> m2 = nongreedy.match(target)
  >>> m1.group(0)
'<h1>Sample String</h1>'
  >>> m2.group(0)
'<h1>'
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From elderic at ish.de  Thu Nov  2 05:06:49 2006
From: elderic at ish.de (elderic)
Date: 2 Nov 2006 02:06:49 -0800
Subject: other ways to check for <type 'function'>?
Message-ID: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>

Hi there,

are there other ways than the ones below to check for <type 'function'>
in a python script?
(partly inspired by wrapping Tkinter :P)

def f():
   print "This is f(). Godspeed!"

1.: --> sort of clumsy and discouraged by the docs as far as I read
import types
type(f) is types.FunctionType

2.: --> I don't like this one at all
def null(): pass
type(f) is type(null)

Basically I'm searching for something like:
"type(f) is func" like in: "type(x) is int"

Any ideas? =)



From news at p2b.datatailors.com  Wed Nov  8 14:51:49 2006
From: news at p2b.datatailors.com (Peter van Kampen)
Date: 08 Nov 2006 19:51:49 GMT
Subject: Is there a commas-in-between idiom?
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
Message-ID: <slrnel39n2.9hk.news@datatailors.xs4all.nl>

On 2006-11-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> I've collected a bunch of list pydioms and other notes here:
>
>     http://effbot.org/zone/python-list.htm

"""
A = B = [] # both names will point to the same list
"""

I've been bitten by this once or twice in the past, but I have always
wondered what it was useful for? Can anybody enlighten me?

TIA,

PterK

-- 
Peter van Kampen
pterk -- at -- datatailors.com


From antonioskatsikadamos at yahoo.com  Wed Nov  8 10:47:01 2006
From: antonioskatsikadamos at yahoo.com (Antonios Katsikadamos)
Date: Wed, 8 Nov 2006 07:47:01 -0800 (PST)
Subject: Python Error:IndentationError: expected an indented block 
Message-ID: <20061108154702.61516.qmail@web58107.mail.re3.yahoo.com>

hi all. I try to run an old python code and i get the following message
 
 File "/home/antonis/db/access.py", line 119
     def DoCsubnet1 (action, subject, target, args):             # DoC servers net
       ^
 IndentationError: expected an indented block
 
 1) and I don't know what causes it. I would be grate full if you could give me a tip.
 
 2) how can i overcome it? Can i use the keyword pass?and if how ccan i use it
 
 
 Kind regards,
 
 Antonios
 
 
---------------------------------
Sponsored Link

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From fredrik at pythonware.com  Mon Nov 13 13:22:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 19:22:38 +0100
Subject: httplib.ResponseNotReady question
In-Reply-To: <1163441112.359818.208520@m7g2000cwm.googlegroups.com>
References: <1163441112.359818.208520@m7g2000cwm.googlegroups.com>
Message-ID: <ejad5e$5nt$1@sea.gmane.org>

Max wrote:

> If I run this with loops=1 then everything works fine.  If I use a
> number greater than 1 then I get the error.  Is there a method call
> that I need to restore the requestor object to a condition where it's
> eligible to receive another response?

I'm pretty sure that to get a new response from the server, you need to 
make a new request.

</F>



From bjourne at gmail.com  Sun Nov  5 17:32:48 2006
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Sun, 5 Nov 2006 23:32:48 +0100
Subject: Projecting MUD maps
Message-ID: <740c3aec0611051432v4bb92f2gc7fa7a933954f64f@mail.gmail.com>

Hello, I'm looking for an algorithm to project "MUD maps" such as the
following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg

MUD:s consists of rooms, each rooms has up to four orthogonal edges
(north, east, west and south) that connects it to another room. So it
is very easy to model a MUD as a directed graph. But projecting the
graph on a surface is very complicated. For example, Room A:s North
edge may connect it to Room B. But Room B:s South edge may connect it
to Room C. Or another tricky example: Room A:s East edge connects it
to Room B, whose East edge connect it to Room C, whose North edge
connects it to Room D, whose West edge connects it to Room E, whose
South edge connects it to Room A. In that example, there would be a
"hole" between Room D and E.

-- 
mvh Bj?rn


From sjmachin at lexicon.net  Mon Nov 20 14:11:15 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 11:11:15 -0800
Subject: cPickle problems
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
	<mailman.297.1163728684.32031.python-list@python.org>
	<1163730111.641857.142850@k70g2000cwa.googlegroups.com>
	<c4T7h.314$_H5.223@tornado.texas.rr.com>
	<1164039181.157901.72130@m73g2000cwd.googlegroups.com>
Message-ID: <1164049874.977314.227330@k70g2000cwa.googlegroups.com>

Jeff  Poole wrote:
> > Jeff -
> >
> > Sorry not to reply sooner, I have been out of town with limited access to
> > c.l.py.  Also, I didn't really pick up on "cPickle problems" as a
> > pyparsing-related post. :)
> >

:-)
Choice of keywords is important -- for example, "Excel" always grabs my
attention. In this case, the keyword the OP should have used is not
"cPickle" but "re"
:-)

[snip]

> >
> > -- Paul
>
> Paul,
>
> No problem, I think we've both been busy with other things.  I was
> actually going to post something on the PyParsing wikispaces since I
> wasn't sure if you checked here.

:-)
I suggest that the OP take his googler back to the shop he bought it
from; it is severely damaged.
:-)

HTH,
John



From tleeuwenburg at gmail.com  Thu Nov 23 18:15:35 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 23 Nov 2006 15:15:35 -0800
Subject: PDF to HTML conversion for The Python Papers
In-Reply-To: <1164253034.295391.56720@j44g2000cwa.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164244166.988532.261370@l39g2000cwd.googlegroups.com>
	<1164253034.295391.56720@j44g2000cwa.googlegroups.com>
Message-ID: <1164323735.492524.48620@j44g2000cwa.googlegroups.com>


Eric_Dexter at msn.com wrote:
> The adobe people have online conversion
>
> http://www.adobe.com/products/acrobat/access_onlinetools.html
>
> google seems to convert them when they end up in the engines
>
> http://www.google.com/search?hl=en&q=pdf+to+html
>
> has a list of converters
>
> http://www.dexrow.com

The adobe online version crashed on the PDF I sent it, which may be
fractionally different from the one currently available.

I haven't tried the others, but I don't feel good about it. However,
maybe I should try a few... If anyone here feels like trying and has
any success, I'd be happy to hear it.

Cheers,
-T
(Editor-In-Chief)



From evenprimes at gmail.com  Thu Nov  9 14:52:25 2006
From: evenprimes at gmail.com (Chris Cioffi)
Date: Thu, 9 Nov 2006 14:52:25 -0500
Subject: Do I want multidispatch or object plug-ins or something else?
Message-ID: <f03f4fdf0611091152l79b3de8ds32cd6ed7b971ab88@mail.gmail.com>

Hello all,

I've got an EDI parsing application written in Python that is becoming
unwieldy to maintain.  At a high level here's what it does:

1.  Loops through the EDI message 1 segment at a time (think SAX XML...)
2.  Once it identifies what type of transaction is being processed it
creates a "sub-parser" specifically for that transaction type
3.  The sub-parser marks up the EDI into HTML and extracts a fair
number of statistics about the transactions.

Now, my sub-parser classes are polymorphic and I've used the hierarchy
to make sure I don't have repeated code in each class.  HOWEVER, I'm
finding it difficult to add new statistic gathering methods because
the code is already rather complex.  That leads me to think I've got
bad design.

What I _think_ I want is a way to register plug-ins that say "I work
with transactions of type X,Y,Z" and then have the sub parser string
together calls to the various plug-ins.

The "master" sub-parser would handle the basic EDI -> HTML formatting
and the plug-ins would handle gathering any statistics.  I currently
use introspection to figure out what segments sub-parsers are
interested in and I figure I would keep doing that in the future.

Can anyone point me to either an on-line or off-line resource I could
use for this type of thing?  Are there established "plug-in patterns"
already?

Part of why I'm asking is because I don't think I even have the right
vocabulary to describe what I'm trying to do.  Any pointers would be
appreciated!

Chris
-- 
"A little government and a little luck are necessary in life, but only
a fool trusts either of them." -- P. J. O'Rourke


From bblais at bryant.edu  Sat Nov 25 11:57:30 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sat, 25 Nov 2006 11:57:30 -0500
Subject: About alternatives to Matlab
In-Reply-To: <1164331082.270046.290720@l39g2000cwd.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
Message-ID: <456875FA.1000209@bryant.edu>

Phil Schmidt wrote:
> 
> I'd love to use Python, but I'm not comfortable with the hardware side
> of that. I'm certain that most, if not all data acquisition hardware
> comes with DLL drivers, which I could interface with using ctypes. I'm
> concerned though about spending more time messing around with the
> hardware interface than it's worth.
> 
> Do you have any experience with this side of the Matlab replacement
> question? How about anyone else? Any recommendations?
> 

Unfortunately, no I don't have experience with the hardware end of things.  One can,
both with c-types and with pyrex, very easily use existing C libraries so if there is
a C-API, that shouldn't be a problem.

Sorry for not being much help!


			bb

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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais



From bill.pursell at gmail.com  Tue Nov 21 01:08:27 2006
From: bill.pursell at gmail.com (Bill Pursell)
Date: 20 Nov 2006 22:08:27 -0800
Subject: Vim scripts for editing Python?
In-Reply-To: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
Message-ID: <1164089307.390351.263980@j44g2000cwa.googlegroups.com>


Rainy wrote:
> Hi, did anyone make a good set of scripts for editing Python in Vim? I
> know there is one on vim.org but it isn't very advanced. thx..

What functionality are you looking for?



From tgrav at mac.com  Fri Nov  3 18:57:49 2006
From: tgrav at mac.com (Tommy Grav)
Date: Fri, 3 Nov 2006 18:57:49 -0500
Subject: Physical constants
Message-ID: <73D46C5F-12AE-4700-86D2-7FAE0DEF6C54@mac.com>

I have some code for doing orbital computations. The code is kind of
extensive with many classes, each having several functions. In these
functions I need to use constants (like the gravitational constant).
What is the best way of implementing a solution when constants are
used in several different classes and functions? I do not want to
pass the constant down through the functions. I have thought of
making a class of constants but I do not want to invoke an
instant in each function. How is the pi and e constants in math
coded?

Tommy
tgrav at mac.com
http://homepage.mac.com/tgrav/

"Any intelligent fool can make things bigger,
more complex, and more violent. It takes a
touch of genious -- and a lot of courage --
to move in the opposite direction"
                          -- Albert Einstein


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From noreply at nospam.it  Fri Nov 10 12:01:02 2006
From: noreply at nospam.it (Danny Scalenotti)
Date: Fri, 10 Nov 2006 18:01:02 +0100
Subject: newbie: minidom
Message-ID: <if25h.664$mZ5.553@tornado.fastwebnet.it>

I'm not able to get out of this .......


from  xml.dom.minidom import getDOMImplementation

impl = getDOMImplementation()  // default UTF-8
doc = impl.createDocument(None, "test",None)
root = doc.documentElement
root.setAttribute('myattrib', '5')

print root.toxml()


I obtain

<test myattrib="5"/>



why not this?

<?xml version="1.0" encoding="UTF-8"?>
<test myattrib="5"/>


thanks


From martin.dion at gmail.com  Mon Nov  6 15:08:13 2006
From: martin.dion at gmail.com (martdi)
Date: 6 Nov 2006 12:08:13 -0800
Subject: adding python scripting to my application
In-Reply-To: <1162840279.875373.301550@f16g2000cwb.googlegroups.com>
References: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
	<1162840279.875373.301550@f16g2000cwb.googlegroups.com>
Message-ID: <1162843693.517313.286480@m73g2000cwd.googlegroups.com>

Jerry wrote:
> I am not a Python guru by any means, but I believe that when an
> application says that you can "script" their application with Python,
> it means that you can actually write Python code to interact with the
> application.  Embedding may be the same thing.  Extending (as I read
> it) involves writing portions of your program in Python and have do the
> logic portions.
>
> If you would like to allow users to write small scripts that interact
> with your program and control it (a la VBScript or AppleScript), then I
> believe embedding Python in your program is what you want.
>
> If you would like Python to run various parts of your program in order
> to make some portions easier to write/manage/whatever, then you want to
> "extend" your program using Python.
>
> The key difference being that you aren't providing a way for someone
> else to interact with your program using Python if you are extending.
>
> Again, I am not a guru and a read through the docs on python.org would
> probably be the best place to get sound technical advice on these
> subjects.
>
> --
> Jerry


I'm not sure either, but I though Extending was making the C/C++ Code
available from Python, while Embedding was making Python Code Available
in your app.



From nun at example.com  Sun Nov 12 15:08:02 2006
From: nun at example.com (Mitja Trampus)
Date: Sun, 12 Nov 2006 21:08:02 +0100
Subject: Random image text generation?
In-Reply-To: <mailman.21.1163361663.32031.python-list@python.org>
References: <mailman.21.1163361663.32031.python-list@python.org>
Message-ID: <DaL5h.287$Ib3.250761@news.siol.net>

skip at pobox.com wrote:
> Is there a module out there that will generate an image with a random text
> string such as the confirmation images you see on various websites?

They're called captcha images or captchas for short.
Googling for "python captcha" returns several hits; see what you like...


From paddy3118 at netscape.net  Wed Nov  8 13:42:00 2006
From: paddy3118 at netscape.net (Paddy)
Date: 8 Nov 2006 10:42:00 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <eistaq$m7u$1@panix3.panix.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
Message-ID: <1163011320.632781.53370@m7g2000cwm.googlegroups.com>


Aahz wrote:
> In article <1162997345.277966.31860 at h48g2000cwc.googlegroups.com>,
> Beliavsky <beliavsky at aol.com> wrote:
> >
> >If this is supposed to justify using bad language in a public forum,
> >it is poorly reasoned. Having heard "f***" does not mean they were not
> >annoyed. 100% of people have seen trash on the street, but that does
> >not justify littering. If a group of people don't mind profanity, there
> >is no harm in their swearing to each other. But Usenet is read by a
> >wide range of people, and needlessly offending some of them is wrong.
> >The OP used "f******" just for emphasis. English is a rich language,
> >and there are better ways of doing that.
>
> Oh, gimme a f****** break.  Do a simple Gooja search to find out how
> often people already use "f***" around here.  I think you're the one who
> needs to justify your position.
> --
> Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/
>
I too know your wrong Aahz. The written word is not the same as that
spoken. People should make an effort to put across their meaning in a
clear manner. If I were going to an interview I would be very careful
about swearing and most likely not do it. People complain about the
friendliness and tone of groups, and mention it when talking about
programming languages.

Not everyone swears like Eddy Murphy in Beverley Hills Cop, and a lot
of those that do, would not do so when they want to impress, or
communicate with a stranger.

The tone of comp.lang.python *is* an asset, I think, to Python that
swearing will diminish.

- Paddy.

P.S. I did a google search and found 540,000 hits for python in c.l.p.
and only 121 for f***. thats less than one in a thousand. Lets keep it
that way please.



From jeremy+complangpython at jeremysanders.net  Fri Nov 10 07:04:57 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 10 Nov 2006 12:04:57 +0000
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<45536639$0$23587$426a34cc@news.free.fr>
	<1163099166.793869.271900@h48g2000cwc.googlegroups.com>
Message-ID: <ej1pt9$fbi$2@gemini.csx.cam.ac.uk>

Dan Lenski wrote:

> My apologies!  I'm glad to be corrected on this.  There are Cygwin
> packages for Qt as well, but I have heard about enough bugs to think I
> should avoid Qt.  I have used enough Gtk apps that run flawlessly under
> Windows to have my hopes that it works well.

You normally use PyQt/Qt on Windows without Cygwin. There are very few bugs
and lots of professional companies base their products on Qt Windows.

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From rganesan at myrealbox.com  Tue Nov 14 09:36:58 2006
From: rganesan at myrealbox.com (Ganesan Rajagopal)
Date: Tue, 14 Nov 2006 20:06:58 +0530
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
	<ejcili$pf6$1@gemini.csx.cam.ac.uk>
Message-ID: <xkvhmz6uxfg5.fsf@grajagop-lnx.cisco.com>

>>>>> Jeremy Sanders <jeremy+complangpython at jeremysanders.net> writes:

>> How do I sort through this data and pull out these points of
>> significance?

> Get a book on statistics. One idea is as follows. If you expect the points
> to be centred around a single value, you can calculate the median or mean
> of the points, calculate their standard deviation (aka spread), and remove
> points which are more than N-times the standard deviation from the median.

Standard deviation was the first thought that jumped to my mind
too. However, that's not what the OP is after. He's seems to be looking for
points when the direction changes. 

Ganesan

-- 
Ganesan Rajagopal



From bignose+hates-spam at benfinney.id.au  Tue Nov 21 20:15:04 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 22 Nov 2006 12:15:04 +1100
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <87fyccwacn.fsf@benfinney.id.au>

"walterbyrd" <walterbyrd at iname.com> writes:

> Reading "Think Like a Computer Scientist" I am not sure I understand
> the way it describes the way objects work with Python.

Congratulations for taking the effort to figure it out, and for
thinking about the questions you want answered.

> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?

Generally, yes. It's up to the programmer to do so in a way that's
readable and makes sense to later readers. There are conventions, of
course, and you should ask about anything specific that confuses you.

One convention that you seem to be unaware of is that assigning
attributes outside of the class's methods is unusual. This is only a
convention, though, and not enforced by the language; on the uncommon
occasions you need to add attributes to an instance outside that
class's methods, you're not prevented from doing it.

> 2) Are classes typically created like this:
>
> class Point:
>   pass

Typically, classes are created as a subclass of another class. The
top-level basic type in Python is 'object', so if your class doesn't
make sense deriving from anything else, derive from 'object'.

    class Point(object):
        pass

Defining a class with *no* superclass is not recommended. If you don't
yet understand the difference between the above style (called a
"new-style" class) and the style you presented, you should always
derive from a superclass ('object' or something more specific) until
you encounter a situation where that causes a problem.

> Then attributes are added at some other time?

No. Typically, the desired attributes are added either to the class
when it is defined, resulting in an attribute value that is shared by
all instances of that class::

    class Point(object):
        spam = 4

Or, the attributes are added to a specific instance (often in the
initialisation method) so that each instance has a separate attribute
with the same name::

    class Point(object):
        spam = 4
        def __init__(self):
            eggs = 2

> 3) What is with the __underscores__ ??

Another convention. Names of the form '__foo__' are a signal to the
reader that this name will be treated specially; often the internals
of Python syntax or some builtin type will look for those names when
performing behind-the-scenes magic.

For instance, the '__init__' attribute of a class is expected to be a
function, and that function is called by Python's instance creation
steps immediately after the creation of an instance. Thus, it is used
to "initialise" the newly-created instance of the class, doing things
specific to that instance.

> 4) Are parameters passed to an class definition?
>
> class Whatever(params):
>    pass

The parameters of the class definition are the super-classes from
which this class should inherit its attributes. They don't correspond
with the parameters to the class constructor.

When you create a new instance of a class, its constructor is called
to create the new instance, and then the initialiser is called, to
perform post-creation steps on the new instance. This all occurs in
one step, as far as the code that called the constructor is concerned.

Unlike in many other languages, you will rarely need to define a
constructor ('__new__') for your Python classes. It's far more common
to let the default constructor create the object, and have any
initialisation steps on the newly-created instance performed in the
class '__init__' method.

The __init__ method gets called by Python's internals (hence the
"special" name with underscores) immediately after the creation of the
instance. It is called with parameters consisting of the newly-created
instance object, followed by all the parameters that were passed to
the constructor.

    origin = Point(0, 0)

This will call the constructor of the Point class, which will create a
new instance; then, the __init__ method of the Point class will be
called with the parameters (<new Point instance>, 0, 0). This means
the function has access to the specific instance, and can modify it
accordingly.

The convention is to use 'self' as the name to refer to the first
parameter to instance methods, so that the instance object is referred
to by the parameter name 'self' in that method.

    class Point(object):
        spam = 4
        def __init__(self, x_coord, y_coord):
            if x_coord < 0:
                x_coord = 0
            if y_coord < 0:
                y_coord = 0
            self.x = x_coord
            self.y = y_coord

This initialisation method does a bit of value fudging, then assigns
values to attributes of the instance, named 'self' in the context of
the method.

After the constructor and the __init__ method have finished, the
program continues at the point where the constructor was called. Thus,
the attributes assigned to the instance are immediately available::

    origin = Point(0, 0)
    print origin.x

-- 
 \      "Anyone who believes exponential growth can go on forever in a |
  `\     finite world is either a madman or an economist."  -- Kenneth |
_o__)                                                         Boulding |
Ben Finney



From __peter__ at web.de  Mon Nov 20 03:58:50 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Nov 2006 09:58:50 +0100
Subject: fileinput.input('test.txt') => ERROR: input() already active
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>
Message-ID: <ejrqnb$5o3$02$1@news.t-online.com>

cyberco wrote:

> Using fileinput.input('test.txt') I probably forgot to process all
> lines or so, since I get the error 'input() already active' when i try
> to call fileinput.input('test.txt') again. But how can I 'close' the
> previous version I opened? I have no handle to it or so...

fileinput.close()

Or you forego the global FileInput instance with

fi = fileinput.FileInput(...)
for line in fi:
   # process line
fi.close()

Personally, I use ordinary files instead.

Peter


From harry.g.george at boeing.com  Fri Nov 10 09:14:43 2006
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 10 Nov 2006 14:14:43 GMT
Subject: manual eggs downloads?
Message-ID: <xqxpsbvjsmk.fsf@cola3.ca.boeing.com>

"eggs" are wonderful for no-hassle get-all-the-dependencies.  However,
they can trigger hands-off downloads from various sites.  This is Bad
News for corporate environments in which every download is carefully
pre-approved.

A tarball with a subdirectory of "third_party" packages is ok.  A web
page simple listing the third party sites and the recommended
downloads is ok.  Automatically downloading is not ok.

Is there some way in the eggs mechanism to just get a list of the
proposed downloads, and let the user take the actions manually?

-- 
Harry George
PLM Engineering Architecture


From pavlovevidence at gmail.com  Tue Nov  7 15:03:23 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 7 Nov 2006 12:03:23 -0800
Subject: __init__ function problem
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
Message-ID: <1162929803.735097.279460@i42g2000cwa.googlegroups.com>

kelin,zzf818 at gmail.com wrote:
> It says the __init__ is called immediately after an instance of the
> class is created. What dose "immediately" mean?
> And what is difference between the init method and the constructor in
> Java?

For all intents and purposes, __init__ is a constructor.  It isn't
technically, but you use it exactly the same way you use constructors
in C++ and Java (well, acutally, Python __init__ is a quite bit more
flexible, though also less convenient in many cases).  Don't worry that
it isn't called a constructor.

In Python, the real constructor is called __new__, but you shouldn't
use __new__ like C++ and Java constructors.  Usually there's no reason
to use __new__ at all.  (The main use case is to return something other
than a newly created object, such as a preallocated or cached object.
For your normally functioning classes, you should use __init__.)


Carl Banks



From inq1ltd at verizon.net  Fri Nov 24 19:19:33 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 24 Nov 2006 19:19:33 -0500
Subject: Access to variable from external imported module
In-Reply-To: <NcK9h.3493$1s6.467@newsread2.news.pas.earthlink.net>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.690.1164404495.32031.python-list@python.org>
	<NcK9h.3493$1s6.467@newsread2.news.pas.earthlink.net>
Message-ID: <200611241919.34161.inq1ltd@verizon.net>


The TRS-80 I bought came with both Basic and 
Assembly Language teaching guides, and that was 
it. To make the machine work one had to program.
I didn't mean to imply that Bill Gates developed 
it. It's well known that MS borrowed stuff when 
they needed to from where ever the could get it.
That's business.

I'm not an MS fan but Bill Gates was the one who 
gave away a very cheep, borrowed but improved, 
copy of DOS to computer sellers. These copies  
could also be copied to floppies (8 inch). So, 
DOS 3.3 was used by computer sellers, to install 
DOS on the buyers machine, (intel 286) free.

On the other hand, IBM sold the same package for 
$50.00.

I got the free copy of MS 3.3 with my 286.

After that, Windows 3.0 cost me $25.00,
                Windows 3.1 cost me $30.00,
                DOS upgrade from3.3 to 6.22 cost 
                me $55.00.
Since then I purchased Win 95, $100.00
                             and Win 98. $125.00.
And, all for testing software that I produced for 
people that use that stuff.  
 
Bill Gates probably can't program any software to 
write "Hello World" on any screen, but I'll bet 
he knows how to fill out a deposit ticket.

I think Bill Gates recognize early that the money 
is in the marketing of the product, not the  
programming of it. How else can you explain the 
success of Windows, like it or not?

jim-on-linux
http://www.inqvista.com




On Friday 24 November 2006 17:18, Dennis Lee 
Bieber wrote:
> On Fri, 24 Nov 2006 16:56:58 -0500,
> jim-on-linux <inq1ltd at verizon.net>
>
> declaimed the following in comp.lang.python:
> > That was when bill gates just left Harvard,
> > basic was brand new, and 4k of memory was
>
> 	Pardon? I'd learned BASIC back around 1972, in
> the 9th grade, using an ASR-33 with dial-up to
> some company's Honeywell-Bull system.
>
> 	BASIC is one of the ancients in languages,
> predating Pascal and C.
>
> 	Just because Gates managed to scrabble
> together a BASIC interpreter for the MITS
> Altair, and then had it picked up by other
> makers of 8080/Z-80 based "microcomputers"
> doesn't make it "brand new". (Personally, I
> suspect he hasn't done any programming ever
> since that day, and is probably still trying to
> find some way to sue Kemeny&Kurtz (sp?s) over
> their own creation)
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support
> Staff:		web-asst at bestiaria.com)
> HTTP://www.bestiaria.com/


From Eric_Dexter at msn.com  Wed Nov  1 20:47:15 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 1 Nov 2006 17:47:15 -0800
Subject: trying to call main function with execfile with two arguments
In-Reply-To: <1162431477.292694.201900@h54g2000cwb.googlegroups.com>
References: <1162431477.292694.201900@h54g2000cwb.googlegroups.com>
Message-ID: <1162432035.292978.62920@m73g2000cwd.googlegroups.com>

To extend and revise my notes this is the dialog box that comes with
boa constructor with very little change.


Eric_Dexter at msn.com wrote:
> I was trying to find out what my value for filename is but it will not
> print.  The file I am calling csoundgrid2.main seems to work fine when
> I call it directly from spe with two values and I have used this file
> dialog to load other files the error I am getting is.  thanks for any
> help in advance
>
>  File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\csoundgrid2.py", line 35, in loadFile
> infile = open(sys.argv[1], 'r') #The first argument passed in is the
> file name
> IndexError: list index out of range
>
> def sco_editor(self):
>          "Pick a sco file and load it into a sco editor"
>          dlg = wx.FileDialog(self,"load sco file", ".", "", "*.sco",
> wx.OPEN)
>          try:
>              if dlg.ShowModal() == wx.ID_OK:
>                  filename = dlg.GetPath()
>                  # Your code
>                  print filename
>                  csoundgrid2.main(filename, """;<sco_header>""")
>                  #("csoundgrid2.py", filename ,""";<sco_header>""",
> shell=True)
>                  #os.startfile('csoundgrid2.py', filename,
> """;<sco_header>""")
>          finally:
>             dlg.Destroy()
>
> https://sourceforge.net/project/showfiles.php?group_id=156455
> http://www.dexrow.com



From fredrik at pythonware.com  Thu Nov 16 03:09:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 09:09:49 +0100
Subject: Secure Python
In-Reply-To: <455c1665@quokka.wn.com.au>
References: <mailman.219.1163646863.32031.python-list@python.org>	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
Message-ID: <ejh6cd$q3l$1@sea.gmane.org>

timmy wrote:

> congraulations you have discovered loops and their misuse

if you don't know what the phrase "denial of service attack" means, you 
can always google for it.

</F>



From bootiack at yahoo.com  Thu Nov  9 19:44:40 2006
From: bootiack at yahoo.com (gavino)
Date: 9 Nov 2006 16:44:40 -0800
Subject: how is python not the same as java?
Message-ID: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>

both are interpreted oo langauges......



From rvernica at gmail.com  Fri Nov 17 18:42:12 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 15:42:12 -0800
Subject: remove a list from a list
In-Reply-To: <pan.2006.11.17.21.30.58.132036@REMOVE.THIS.cybersource.com.au>
References: <ejkv1u$ajf$1@sea.gmane.org>
	<455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>
	<455E0A20.9000509@tim.thechases.com>	<ejl2re$ns3$1@sea.gmane.org>
	<455E100D.8030100@tim.thechases.com>	<mailman.374.1163793666.32031.python-list@python.org>
	<pan.2006.11.17.21.30.58.132036@REMOVE.THIS.cybersource.com.au>
Message-ID: <ejlhcc$4r1$2@sea.gmane.org>

This solution I think is pretty nice:

source[:] = [x for x in source if x.lower() not in target]

Thanks a lot for all the answers,
Ray

Steven D'Aprano wrote:
> On Fri, 17 Nov 2006 12:00:46 -0800, Rares Vernica wrote:
> 
>> Problem context:
>>
>> import os
>> dirs_exclude = set(('a', 'b', 'e'))
>> for root, dirs, files in os.walk('python/Lib/email'):
>>      # Task:
>>      # delete from "dirs" the directory names from "dirs_exclude"
>>      # case-insensitive
>>
>> The solution so far is:
>>
>> for i in xrange(len(dirs), 0, -1):
>>    if dirs[i-1].lower() in dirs_exclude:
>>      del dirs[i-1]
>>
>> I am looking for a nicer solution.
> 
> Define "nicer".
> 
> First thing I'd do is change the loop:
> 
> for i in xrange(len(dirs)-1, -1, -1):
>     if dirs[i].lower() in dirs_exclude:
>         del dirs[i]
> 
> Second thing I'd do is encapsulate it in a function instead of calling it
> in place:
> 
> def remove_in_place(source, target):
>     for i in xrange(len(source)-1, -1, -1):
>         if source[i].lower() in target:
>             del source[i]
> 
> Third thing I'd do is replace the delete-in-place code away, and build a
> new list using the set idiom, finally using list slicing to change the
> source in place:
> 
> def remove_in_place2(source, target):
>     target = set(s.lower() for s in target)
>     source[:] = [x for x in source if x.lower() not in target]
>     # note the assignment to a slice
> 
> And finally, I would test the two versions remove_in_place and
> remove_in_place2 to see which is faster.
> 
> 
> import timeit
> 
> setup = """from __main__ import remove_in_place
> target = list("aEIOu")
> source = list("AbcdEfghIjklmnOpqrstUvwxyz")
> """
> 
> tester = """tmplist = source[:] # make a copy of the list!
> remove_in_place(tmplist, target)
> """
> 
> timeit.Timer(tester, setup).timer()
> 
> You have to make a copy of the list on every iteration because you are
> changing it in place; otherwise you change the values you are testing
> against, and the second iteration onwards doesn't have to remove anything.
> 
> 
> (All code above untested. Use at own risk.)
> 



From vinjvinj at gmail.com  Sun Nov  5 01:41:39 2006
From: vinjvinj at gmail.com (vj)
Date: 4 Nov 2006 22:41:39 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <1162690929.501897.258360@b28g2000cwb.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1162690929.501897.258360@b28g2000cwb.googlegroups.com>
Message-ID: <1162708898.962171.161120@e3g2000cwe.googlegroups.com>

Forgot to mention WING's file search and replace is pretty cool and
powerful. It keeps checking changes in a different thread. If you want
to change yyy in say 100 files you would:

1. specify yyy in the search window
2. A list of files get displayed with matching yyy
3. As you fix replace yyy in the files the list of files with matching
yyy reduces automatically. This is very cool and very useful.

Another thing I like about WING is that it warns you if you have tabs
ans spaces mixed in a file.

The embedded python shell is also a useful feature.

VJ



From vedran at v-programs.com  Tue Nov  7 11:06:38 2006
From: vedran at v-programs.com (vedran at v-programs.com)
Date: 7 Nov 2006 08:06:38 -0800
Subject: ftplib security support
Message-ID: <1162915598.902958.91930@k70g2000cwa.googlegroups.com>

Hello,

One simple question.Which security ftplib support,and how to I 'load'
these security to ftputil.
(Please don't give me security modules)

e.g.


ftp=FTPHost('myhost','myusername','mypassword',session_factory=ftplib.FTP)

     is this example well?  (for loading ftplib security to ftputil)






                            Thanks



From __peter__ at web.de  Thu Nov  2 15:54:11 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 02 Nov 2006 21:54:11 +0100
Subject: __doc__ in compiled script
References: <mailman.1686.1162499924.11739.python-list@python.org>
Message-ID: <eidltd$v0m$01$2@news.t-online.com>

Gabriel Genellina wrote:

> Hello
> 
> I have a script starting with a docstring. After compiling it with
> compile(), is there any way I could get the docstring? __doc__ on the
> code object doesn't work.
> I can't use __import__ because the script has top-level statements
> that have to be executed only once (it's not supposed to be used as a
> module).
> 
> --- begin test.py ---
> body = """
> "This is a docstring"
> 
> x=0
> some(code).toBeExecuted("later")
> """
> 
> co = compile(body,'<string>','exec')
> print co.__doc__
> 
> # what can I use for "something" below: ?
> assert something(co)=="This is a docstring"
> --- end test.py ---

>>> co.co_consts[list(co.co_names).index("__doc__")]
'This is a docstring'

or probably just

>>> co.co_consts[0]
'This is a docstring'

as I cannot imaginge the docstring to have a non-zero index.

Peter



From hg at nospam.com  Tue Nov 28 13:24:32 2006
From: hg at nospam.com (hg)
Date: Tue, 28 Nov 2006 12:24:32 -0600
Subject: pyxpcom
In-Reply-To: <mailman.809.1164736366.32031.python-list@python.org>
References: <QhHah.226$YX1.85@newsfe23.lga>
	<mailman.809.1164736366.32031.python-list@python.org>
Message-ID: <cg%ah.268$Gf6.11@newsfe21.lga>

Trent Mick wrote:
> hg wrote:
>> Hi,
>>
>> Can one tell me what the status of this project is ?. I did google ...
>> but not much out there.
> 
> PyXPCOM source is in the main Mozilla CVS tree. It is being maintained
> by Mark Hammond (the original developer of the extension). There isn't a
> lot of activity on it, I think, because:
> 1. Mark did such a good job of implementing it the first time around
> that it needs very little work :)
> 2. It is very high learning curve to get into playing with PyXPCOM
> because there are no conveniently packaged builds of PyXPCOM for current
> (or any) versions of Firefox or Mozilla.
> 
> Interestingly, Mark is currently working *full* support for Python in
> the Mozilla code base, i.e. being able to use Python anywhere you can
> currently use JavaScript (in <script> tags in XUL and HTML). Look for
> "nsdom" and Python. Note that it is still very much in development
> phase, is only part of the Mozilla trunk (I believe) -- hence only
> really applies to Firefox versions well beyond FF2.
> 
> The pyxpcom mailing list is here:
> http://listserv.activestate.com/mailman/listinfo/pyxpcom
> 
> PyXPCOM is heavily used in Komodo
> (<http://www.activestate.com/Products/Komodo/>, the IDE that I work on
> at ActiveState).
> 
> Regarding #2 (from above): Mark started some discussion a while back
> about the  what it would take to provide builds of PyXPCOM. The answer
> is that it would probably be very hard.
> http://aspn.activestate.com/ASPN/Mail/Message/pyxpcom/3167613
> 
> 
> Cheers,
> Trent
> 
Thanks,

My need is as follows: I have developed an activex component to access a
smart card on the client side / do some web site logon.

Are xpcom / pyxpcom advanced/stable enough for such an implementation
under Linux / Windows ?

Regards,

hg






From sjmachin at lexicon.net  Thu Nov  9 13:51:49 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 10:51:49 -0800
Subject: opening excel
In-Reply-To: <mailman.1966.1163064255.11739.python-list@python.org>
References: <mailman.1966.1163064255.11739.python-list@python.org>
Message-ID: <1163098309.670307.126800@h54g2000cwb.googlegroups.com>


wesley chun wrote:
> > has anybody got any experience opening and manilpulating excel
> > spreedsheets via python? it seems pythoncom allows this to happen
>
>
> i posted a couple of snippets along with others in this earlier thread:
>
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/a7ed60067ca5a8d4
>
> the XLRD package is a platform-independent non-COM way to *extract*
> Excel data. you mentioned opening and manipulating spreadsheets
> *using* COM, so there are more examples targeted towards what you were
> asking for at that link.

What makes you so sure that's what the OP was asking for?

"mentioned" != "asking for".

Did you not notice his last sentence, "all i need to do, is open the
xls files and read values from it."?

>
> i added a small section on Win32 COM client programming to the Core
> Python book, and although it doesn't go extremely in-depth, it's
> perfectly targeted to "newbs" coming from the Unix world, as was i.
>
> hope this helps!
> -- wesley
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> "Core Python Programming", Prentice Hall, (c)2007,2001
>     http://corepython.com
>
> wesley.j.chun :: wescpy-at-gmail.com
> python training and technical consulting
> cyberweb.consulting : silicon valley, ca
> http://cyberwebconsulting.com



From fredrik at pythonware.com  Wed Nov  1 09:25:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 15:25:59 +0100
Subject: Make all files extension lower by a given directory name
In-Reply-To: <20061101141648.38737.qmail@web15001.mail.cnb.yahoo.com>
References: <20061101141648.38737.qmail@web15001.mail.cnb.yahoo.com>
Message-ID: <eiaapn$l24$1@sea.gmane.org>

Tiefeng Wu wrote:

> strip off the last character because if simply add name
 > and ext I got result like "FOO..bar", there are two dots.

that's not how splitext works, though:

 >>> os.path.splitext("FOO.BAR")
('FOO', '.BAR')

can you post an example of a filename that misbehaves on your machine?

</F>



From fredrik at pythonware.com  Fri Nov  3 11:04:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 17:04:33 +0100
Subject: Is there a way to define a true global across modules?
In-Reply-To: <005d01c6ff5e$2b5d95c0$03000080@hendrik>
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik>
Message-ID: <eifpam$6on$1@sea.gmane.org>

Hendrik van Rooyen wrote:

> I am struggling with this - I want to define a "system-wide" flag for use as a
> semaphore.

http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm

</F>



From jln at iafrica.com  Sat Nov 11 03:55:22 2006
From: jln at iafrica.com (Jacques Naude)
Date: Sat, 11 Nov 2006 10:55:22 +0200
Subject: how is python not the same as java?
In-Reply-To: <1163203459.695403.19830@m7g2000cwm.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<1163203459.695403.19830@m7g2000cwm.googlegroups.com>
Message-ID: <ej435p$hpp$1@ctb-nnrp2.saix.net>

Eric_Dexter at msn.com wrote:
> You can get educated in java through manpower for free just apply for a
> job(through thier online learning thing) but you can't add python to
> your plan.  :(  They have pearl, c, basic, cobol also but no
> python.....
> 
> https://sourceforge.net/project/showfiles.php?group_id=156455
> 
> 
> gavino wrote:
>> both are interpreted oo langauges......
> 
Pearl?


From http  Sat Nov 18 17:39:48 2006
From: http (Paul Rubin)
Date: 18 Nov 2006 14:39:48 -0800
Subject: syntax error in sum(). Please explicate.
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
Message-ID: <7xbqn45qh7.fsf@ruckus.brouhaha.com>

Michael Press <jack at abc.net> writes:
>   File "/Users/mdp/source/prime_counter_python", line 6
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>                                           ^
> SyntaxError: invalid syntax
> 
> Here are some lines from python -v:
> 
> Python 2.3 (#1, Sep 13 2003, 00:49:11) 

Generator comprehensions like you used weren't introduced til 
Python 2.4, so 2.3 will raise a syntax error like you got.


From steve at REMOVEME.cybersource.com.au  Wed Nov 15 22:30:29 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 16 Nov 2006 14:30:29 +1100
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
Message-ID: <pan.2006.11.16.03.30.28.643676@REMOVEME.cybersource.com.au>

On Wed, 15 Nov 2006 22:58:55 +0000, John Bokma wrote:

> Harry George <harry.g.george at boeing.com> wrote:
>  
>> Short answer: People use Python instead of Java because people (at
>> least intelligent people) tend to avoid pain.
> 
> Intelligent people don't suffer from fanboy sentiments. They just pick a 
> language that works best for them.

Hang on, are we talking about intelligent people, or the sort of people
who like coding in Java? *wink*

Sorry, couldn't resist :)

Seriously though, there is no contradiction between the idea of "people
use Python instead of Java because they prefer to avoid pain" and "people
choose the language that works best for them". They could both be true (or
neither, but that's another story). We're all individuals, with our own
little quirks, but we are all also human beings with a lot in common and
the idea of an objectively "less painful" language is not silly. It may
very well be that Python is objectively easier to use and less painful
than Java for the majority of people. (I have no opinion on whether that
it true, but merely note that it is a logical possibility.)

Ease of use is not the sole reason for choosing a computer language. It is
a virtue, but not the only virtue. I wouldn't like to see video drivers
written in pure Python.

The reality is, most programmers don't so much choose a language as
have one thrust at them. I estimate (and by estimate I mean guess) that
90% of coders have never learnt a second language, and 99% have never
learnt a third. We're spoiled here, because the sort of people who
regularly contribute to comp.lang.* are often those with experience
with three, four, a dozen languages -- hardly representative of the coders
who churn out VB code all day, or those who learn nothing but Java at Uni
and then go straight into a Java job. We often see on comp.lang.*
people who programfor the love of programming. They'd program even if they
weren't paid for it. But being a programmer is also done by those who
program for the pay, not for the love of the job. They don't go home and
night and spend three hours on Usenet answering newbies' questions.

In many universities and schools, the choice is often between Java (in
previous times C++) or nothing. People might choose Java in some sense,
but they can hardly be said to choose Java because it works best for them
if they know no other languages to compare it to! 

(The same naturally goes for those who only know Python, or any other
language.)



-- 
Steven D'Aprano 



From python.list at tim.thechases.com  Mon Nov 20 11:32:41 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 20 Nov 2006 10:32:41 -0600
Subject: a few extensions for the itertools
In-Reply-To: <4561ccac$0$11610$3b214f66@tunews.univie.ac.at>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>	<mailman.478.1163992943.32031.python-list@python.org>	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>	<Xns98815B738B64Cduncanbooth@127.0.0.1>
	<4561ccac$0$11610$3b214f66@tunews.univie.ac.at>
Message-ID: <4561D8A9.3040409@tim.thechases.com>

>>> No, because the builtin sum want's a list. This can also
>>> handle any kind of iterable, so this would work:
>>> 
>>> isum(i**2 for i in xrange(100))
>>> 
>>> sum would need firs the whole list to be generated:
>>> 
>>> sum([i**2 for i in xrange(100)])
>> Really?
>> 
>>>>> sum(i**2 for i in xrange(20000000))
>> 2666666466666670000000L
>> 
>> seems to work fine, and judging by the memory usage it
>> pretty obviously doesn't create an intermediate list.
> 
> Very strange. I must have made some strange error. I tried
> that (more than once) and it failed. Don't know why. But now
> it works here, too. What did I write, when it failed?

Could you have been trying it on a version of python <2.4?

tim at oblique:~$ python2.3
Python 2.3.5 (#2, Sep  4 2005, 22:01:42)
[GCC 3.3.5 (Debian 1:3.3.5-13)] on linux2
Type "help", "copyright", "credits" or "license" for more 
information.
 >>> sum(i**2 for i in xrange(100))
   File "<stdin>", line 1
     sum(i**2 for i in xrange(100))
                ^
SyntaxError: invalid syntax


tim at oblique:~$ python2.4
Python 2.4.1 (#2, May  5 2005, 11:32:06)
[GCC 3.3.5 (Debian 1:3.3.5-12)] on linux2
Type "help", "copyright", "credits" or "license" for more 
information.
 >>> sum(i**2 for i in xrange(100))
328350


-tkc





From mail at microcorp.co.za  Mon Nov 20 09:58:05 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 16:58:05 +0200
Subject: rpncalc-2.5 RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com><mailman.491.1164004338.32031.python-list@python.org><1164009539.310173.248620@m7g2000cwm.googlegroups.com>
	<1164010575.812704.120600@f16g2000cwb.googlegroups.com>
Message-ID: <000401c70d24$b2dd9bc0$03000080@hendrik>

From: "Ant" <antroy at gmail.com> wrote:


> 
> > name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
> 
> Lukershavik IIRC. At least that's how I was told it was pronounced (I
> had to say the damn name many times in presentations whilst using his
> algebras to model three-valued logic. Don't know if there were many
> Poles there to criticise mind ;-) )
 
Thanks that will help...

Hendrik




From brettjasoncohen at gmail.com  Fri Nov 10 08:22:56 2006
From: brettjasoncohen at gmail.com (brettjasoncohen at gmail.com)
Date: 10 Nov 2006 05:22:56 -0800
Subject: PythonWin Editor Freezes System
Message-ID: <1163164976.266339.320130@b28g2000cwb.googlegroups.com>

When stepping through a program in the PythonWin Editor, sometimes the
rest of my system becomes unresponsive, espescially the program menu
items (File, Edit, ..., Help).
Help!
Brett



From mail at microcorp.co.za  Fri Nov 10 00:43:43 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 10 Nov 2006 07:43:43 +0200
Subject: substring search without using built in utils
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl><mailman.1954.1163038984.11739.python-list@python.org><45530805$0$10013$426a74cc@news.free.fr><1163071862.056378.13870@f16g2000cwb.googlegroups.com>
	<pan.2006.11.09.13.33.09.874729@REMOVE.THIS.cybersource.com.au>
Message-ID: <034401c70496$a7c59da0$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote:
8<--------------------------

> Given a source list, find the offset of a target sub-list within the
> source list, in other words, find for lists.
>
> i.e. search(source, target) returns n if source[n:n+len(target)] == target
> for any sequence type.
>
> Yes, I know I'm changing the constraints of the problem. Now for a real
> challenge, change the search from a one-dimensional data structure to two.
>
> (The solution is left as an exercise for the class.)

do you mean like a cross word puzzle - find for fit both across and down, and
possibly reversed too, in both dimensions? - sounds like a lot of nested loops
to me...

- Hendrik





From onurb at xiludom.gro  Wed Nov 22 07:09:41 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 22 Nov 2006 13:09:41 +0100
Subject: Python visual IDE
In-Reply-To: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
Message-ID: <45643e06$0$11154$426a74cc@news.free.fr>

king kikapu wrote:
> Hi to all,
> 
> i am not sure if this question really belongs here but anyway, here it
> goes: I have seen a lot of IDEs for Python, a lot of good stuff but
> actually none of them has what, for example, Visual Studio has: a
> Visual Editor (with the  ability to place controls on forms etc etc),
> or RAD
> 
> I know that there is Glade but does anybody knows of some product, or
> an ongoing effort to this direction so i can have a look at ?
> 
> Coming from Windows and vs.net world, i think the only missing point
> here is the integration of the Pyrthon with a RAD IDE...
> 
> Thanks a lot and i apologize if this isn't the correct place for this
> question...

If you use wxWidgets, you may want to have a look at projects like
Boa-constructor or PythonCard. If you use QT/KDE, Eric3 offers good
integration with QT Designer IIRC.

Now as you can see, the problem with RAD tools is that they are specific
to a given GUI toolkit. Python runs on a lot of platforms, and some of
these platforms (ie Linux) are not tied to a specific GUI toolkit. So
integrating the RAD tool in the IDE means you can't use this IDE with
other GUI toolkits.

Also, there's a tradition in the *n*x world about preferring small,
highly specialized tools over huge monolithic do-it-all applications. As
an example, I daily use half a dozen languages, and I wouldn't like to
have to learn half a dozen IDEs. I'm much more productive with a good
code editor, the command line, and a few external tools when needed.

My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From martin at v.loewis.de  Tue Nov  7 14:32:55 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Nov 2006 20:32:55 +0100
Subject: os.path.exists and unicode filenames
In-Reply-To: <mailman.1846.1162926833.11739.python-list@python.org>
References: <mailman.1846.1162926833.11739.python-list@python.org>
Message-ID: <4550df69$0$20582$9b622d9e@news.freenet.de>

Peter Bienstman schrieb:
> UnicodeEncodeError: 'ascii' codec can't encode characters in position 24-29: 
> ordinal not in range(128)
> 
> I could try encoding the string in utg-8, but then it wouldn't work under 
> Windows.
> 
> Is there an elegant cross-platform solution for this?

I assume you are using some Unix version here. If so, you should set up
the locale correctly. For example, if you set LANG to a UTF-8 locale
supported by your operating system, this (passing Unicode strings to
os.path.exists etc) works just fine.

Python follows the Unix convention that the locale defines how to
interpret characters, in particular for file names.

Regards,
Martin


From p.lavarre at ieee.org  Wed Nov 15 03:25:22 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 15 Nov 2006 00:25:22 -0800
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
	<mailman.8.1163336252.32031.python-list@python.org>
Message-ID: <1163579122.362383.203240@k70g2000cwa.googlegroups.com>

> A FAQ that discusses good ways to handle Python-like literals and
> expressions would definitely be a useful addition to the FAQ.  if nobody
> else does anything about it, I'll get there sooner or later.

Thank you.

>  > eval(source, {'builtins': {}}) works enough like an evaluator of
>  > literals to ...
>
> eval(source, {'builtins': {}}) doesn't prevent you from using built-ins,
> though.  it's spelled __builtins__, not builtins:
>
>  >>> eval("len('10')", {"builtins": {}})
> 2
>  >>> eval("len('10')", {"__builtins__": {}}
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "<string>", line 1, in <module>
> NameError: name 'len' is not defined

Grin.  Indeed, newbie me, I didn't know that either, thank you.

I was happy enough when I saw an improvement like:

>>> import os
>>> result = eval("os.system('pwd')")
.../Desktop
>>> result = eval("os.system('pwd')", {"whatever": {}})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
NameError: name 'os' is not defined
>>>

Now I fear that I must have copied the misspelled builtins from some
page that's still out there somewhere misleading people ...



From onurb at xiludom.gro  Tue Nov 21 06:09:51 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 21 Nov 2006 12:09:51 +0100
Subject: Programmatically replacing an API for another module
In-Reply-To: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
Message-ID: <4562de7f$0$21252$426a34cc@news.free.fr>

Tom Plunket wrote:
> I've got a bunch of code that runs under a bunch of unit tests.  It'd
> be really handy if when testing I could supply replacement
> functionality to verify that the right things get called without those
> things actually getting called, since frequently those calls take a
> long time to execute and do things that, well, I don't really want to
> do.

Congratulation, you just rediscovered the MockObject.

(snip)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Fri Nov 17 17:36:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 23:36:32 +0100
Subject: Decimal() instead of float?
In-Reply-To: <1163800304.5107.179.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>	<ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper>	<ejl5s5$334$1@sea.gmane.org>
	<1163800304.5107.179.camel@pepper>
Message-ID: <ejldhi$r0f$1@sea.gmane.org>

Michael B. Trausch wrote:

> Sure, I do.  Let's say that I want to work with the latitude 
> 33.6907570.  In Python, that number can not be stored exactly without 
> the aid of decimal.Decimal().
> 
>  >>> 33.6907570
> 33.690756999999998
>  >>>
> 
> As you can see, it loses accuracy after the 6th decimal place.

You are joking, right?

</F>



From paddy3118 at netscape.net  Tue Nov 28 11:56:03 2006
From: paddy3118 at netscape.net (Paddy)
Date: 28 Nov 2006 08:56:03 -0800
Subject: Reading GDSII layouts
In-Reply-To: <mailman.796.1164712312.32031.python-list@python.org>
References: <mailman.796.1164712312.32031.python-list@python.org>
Message-ID: <1164732963.158392.35670@14g2000cws.googlegroups.com>


Vincent Arnoux wrote:
> Hello,
> I am looking for a library for reading GDSII layout files structures (hierarchy, cells names, ...).
> I found IPKISS (http://www.photonics.intec.ugent.be/research/facilities/design/ipkiss/default.htm),
> but it looks to be a generator and not a reader.
>
> Thank you,
> Vincent

The link you gave states this near the top:
  IPKISS is a python-based library for the generation of GDSII layouts,
including hierarchy.
  It has grown out of the GDS_KEY library, but it is more flexible and
object oriented. Contrary
  to GDS_KEY,  **it can read and edit existing GDSII files**.

And at the bottom of the page:
  * Import of existing GDSII files into a layout (import.py)

It looks to be a reader?!

- Paddy.



From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 12:42:30 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 17:42:30 GMT
Subject: forwarding *arg parameter
In-Reply-To: <pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
Message-ID: <aop3h.180$7b6.55@read3.inet.fi>

Steven D'Aprano wrote:
<snip>
> You could write something like this:
> 
> def g(*arg):
>     # Detect the special case of a single tuple argument
>     if len(arg) == 1 and type(arg[0]) == tuple:
>         return arg[0]
>     else:
>         return arg
> 
> but now tuple arguments are treated differently to all other data. Why do
> you think you need that?

I am looking a shorter way to do the above in the case:

def g(*arg):
     return arg

def f(*arg):
     return g(arg)

How can g know if it is called directly with (('foo', 'bar'),) or via f 
with ('foo', 'bar'). I coud write in f: return g(arg[0], arg[1]) if I 
know the number of arguments, but what if I don't know that in design time?

TV


From fredrik at pythonware.com  Wed Nov  1 09:07:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 15:07:55 +0100
Subject: report progress from C function
In-Reply-To: <20061101140546.35418.qmail@web88311.mail.re4.yahoo.com>
References: <eia90r$d4d$1@sea.gmane.org>
	<20061101140546.35418.qmail@web88311.mail.re4.yahoo.com>
Message-ID: <eia9nq$gq8$1@sea.gmane.org>

Michael S wrote:

> My assembler is very basic, so it wouldn't help, while
> my C is OK, well sort of.
> 
> BTW. Neither have I looked at the machine code that
> the assembler produces. 

so why does the output from Pyrex worry you?  it's a compiler, after all.

</F>



From jan.danielsson at gmail.com  Thu Nov 30 23:34:31 2006
From: jan.danielsson at gmail.com (Jan Danielsson)
Date: Fri, 01 Dec 2006 05:34:31 +0100
Subject: UTF8 & HTMLParser
In-Reply-To: <456faf5e$1@griseus.its.uu.se>
References: <456faf5e$1@griseus.its.uu.se>
Message-ID: <456fafdb$1@griseus.its.uu.se>

Jan Danielsson wrote:
> Hello all,
> 
>    I'm writing a python script which fetches a HTML-page (using wget),
> and then parses the retrieved page using a custom htmllib HTMLParser.
> 
>    The page I fetch is encoded in utf8, and my text-handler currently
> looks like this:
> 
>    def handle_data(self, text):
>       if self.inOption:
>          self.currentName = text
> 
>    However, I would like to convert the "text" (which is utf8) to
> latin-1. How do I do that? I've been trying to figure it out for some
> time now, and I'm just getting frustrated. :-(

   I should have mentioned: The problem appears to be that I can't seem
to find a way to make python understand that "text" (the above argument)
is in fact already utf-8.

-- 
Kind Regards,
Jan Danielsson
Te audire non possum. Musa sapientum fixa est in aure.


From grumman at example.com  Sat Nov 11 00:01:33 2006
From: grumman at example.com (Grumman)
Date: Sat, 11 Nov 2006 00:01:33 -0500
Subject: odd problem with watsup and VB6 application with modal dialog
Message-ID: <JNc5h.194$3i6.48@newsfe03.lga>

For various reasons, I've found myself in the position of needing to 
automate the operation of a small VB6 application from an external 
process. After a bit of searching, I found watsup, and it has fit the 
bill nicely, except for one problem.

Roughly, I have a script that fills in a field, sets a combobox, then 
clicks a button via clickButton. At this point, the python interpreter 
hangs. The only thing I've been able to identify as different about this 
form is that it is set as dialog-modal.

I've managed to work around this by adding a second python script that 
contains just enough code to click the offending button. I call it via 
os.system('start other.py') and it starts in a different process, clicks 
the button then hangs.

But the main script continues on to fill in the following form, and 
click another button. When the VB app returns to its starting form, 
destroying the other form instances, the hung interpreter ends.

This works, but it is quite the ugly kludge isn't it?

Is this a normal behaviour for watsup with modal windows? Is there a 
saner way around it?

I should point out I spend my days in the midrange world, so I'm largely 
ignorant of the vagaries of the windows API and such.


From allenjo5 at mail.northgrum.com  Fri Nov 17 09:16:45 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 17 Nov 2006 06:16:45 -0800
Subject: Question about unreasonable slowness
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
	<455ce05a$0$5794$4d3efbfe@news.sover.net>
Message-ID: <1163773005.201111.175020@f16g2000cwb.googlegroups.com>

Leif K-Brooks wrote:
> allenjo5 at mail.northgrum.com wrote:
> > i = 0
> > while (i < 20):
> >   i = i + 1
>
> for i in xrange(20):
>
> >   (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")  # for testing, the
> > spawned shell does nothing
> >   print 'next'
> > #  for line in shellOut:
> > #       print line
> >
> > On my system (AIX 5.1 if it matters, with Python 2.4.3), this simple
> > loop spawning 20 subshells takes .75 sec.  Ok, that's reasonable.  Now,
> > if I uncomment the two commented lines, which loop over the empty
> > shellOut array, the progam now takes 11 secs.   That slowdown seems
> > very hard to believe.  Why should it slow down so much?
>
> The key fact here is that shellOut isn't an array; it's a living,
> breathing file object. If you don't iterate over it, you can run all 20
> shell processes in parallel if necessary; but if you do iterate over it,
>    you're waiting for sh's stdout pipe to reach EOF, which effectively
> means you can only run one process at a time.

Aha!  I now notice that with the second loop commented out, I see many
python processes running for a little while after the main program
ends.   So that confirms what you stated.

> On my system (OS X 10.4 with Python 2.5 installed), your code runs in
> .187 secs with the loop commented out, and in .268 secs otherwise. But I
> guess AIX's sh is slower than OS X's.

Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
python 2.4.3.   So, that's better, but still unreasonably slow.  And to
answer another's question, I'm using the ksh builtin 'time' command to
time the overall script.

BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
This naively translated pure shell version of my python test script
completes in .1 secs:

i=1
while ((i<20))
do ((i+=1))
   print next
   print "$shellIn" | /bin/sh -c ':' |
           while read line
           do print $line
           done
done

Has anyone tried this on a true unix box (AIX, HPUX, Solaris, Linux)?
It seems to be functioning differently (and faster) on Windows and OS X
 (though I guess at its heard, OS X is essentially unix).

John.



From asbach at ient.rwth-aachen.de  Thu Nov  2 18:32:14 2006
From: asbach at ient.rwth-aachen.de (Mark Asbach)
Date: Fri, 3 Nov 2006 00:32:14 +0100
Subject: How to test python extension modules during 'make check' / 'make
	distcheck'?
Message-ID: <1ho79n0.1ui6ozx1bxjznkN%asbach@ient.rwth-aachen.de>

Hi pythonians,

I'm one of the maintainers of an open source image processing toolkit
(OpenCV) and responsible for parts of the autotools setup. The package
mainly consists of four shared libraries but is accompanied by a python
package containing some pure python code and of course extension modules
for the four libraries.

Now during the last month we were preparing a major release which means
testing, fixing, testing, fixing, ... in the first degree. Typical
functionality of the shared libraries is verified during 'make check'
and 'make distcheck' by binaries that are linked against the libraries
(straight forward) and are listed in the 'TESTS' automake primary.

Unfortunately, many problems with the python wrappers arose from time to
time. Currently we have to build and install before we can run any
python-based test routines. When trying to integrate python module
testing into the automake setup, there are some problems that I couldn't
find a solution for:

a) the extension modules are built in different (other) subdirectories -
so they are not in the local path where python could find them

b) the libraries and extension modules are built with libtool and may
have rpaths compiled in (is this problematic)?

c) a different version of our wrappers might be installed on the testing
machine, somewhere in python/site-packages. How can I make sure that
python only finds my 'new' local generated modules?

Since the project is targeted at C/C++ developers in the first degree
and the python wrappers are just an add-on, there is no chance to
migrate it away from automake to someting else (like distutils, etc.).

Did someone solve a similar problem?

Thanks in advance,

Mark

P.S.: I'll post a similar message to the automake mailing list, but
probably python developers are a minority there ... 

-- 
  Dipl.-Ing. Mark Asbach                      Tel +49 (0)241-80-27677
  Institute of Communications Engineering     Fax +49 (0)241 80-22196
  RWTH Aachen University, Germany      http://www.ient.rwth-aachen.de


From harry.g.george at boeing.com  Thu Nov 16 11:26:45 2006
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 16 Nov 2006 16:26:45 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
Message-ID: <xqx3b8jgxx6.fsf@cola3.ca.boeing.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> On Wed, 15 Nov 2006 22:41:19 GMT, Maurice LING <mauriceling at acm.org>
> declaimed the following in comp.lang.python:
> 
> > 
> > I'm hoping for a more optimistic outcome that this may open a 
> > possibility for tigher interoperability between java programs and python 
> > programs. That is, run java class files or java codes natively on python 
> > VM. Is this still a blue sky dream?
> >
> 	Most unlikely to happen... I don't really see anyone going to the
> effort to change the javac back-end to target a totally different
> runtime engine. 
> -- 
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/

I once wrote a partial JVM in Modula-3 (strictly a researchware
effort), so I can imagine it being done technically.  But why?

The big problem with Java-and-Python is not the VMs underneath.  It is
the fact that Java has layers upon layers upon layers of idiosyncratic
libraries and idioms.  When you write bindings to that world (even if
the bindings are generated automagically), you have to *think* in
those same layers.  The Python-oriented developer suddenly has to use
a dozen imports in order to do things already done better in
Pythonesque libraries.

-- 
Harry George
PLM Engineering Architecture


From researchbase at gmail.com  Thu Nov 30 05:03:22 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 30 Nov 2006 15:33:22 +0530
Subject: question on pygtk and accessibility on windows.
Message-ID: <f81479dd0611300203u6e6b4229g9620f3ce1af358ec@mail.gmail.com>

has any one tried py gtk on windows?
I tried to do a google search for accessibility related issues but did
not find any thing specific to pygtk and windows accessibility.
I even tried to search for just gtk and windows accessibility but
again no result.
so I am now posting this message as a last hope to at least get a "yes
" or "no " answer on whether py gtk is accessible with windows.
thanks.
Krishnakant.


From carsten at uniqsys.com  Thu Nov 16 11:38:21 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 16 Nov 2006 11:38:21 -0500
Subject: atexit.register does not return the registered function. IMHO,
	it should.
In-Reply-To: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
References: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
Message-ID: <1163695101.3380.27.camel@dot.uniqsys.com>

On Thu, 2006-11-16 at 08:03 -0800, prouleau001 at gmail.com wrote:
>   @atexit.register
>   def goodbye():
>       print "Goodbye, terminating..."
> 
> 
> However, there is one fundamental problem with this: atexit.register()
> returns None. Since the above code corresponds to::
> 
> 
>   def goodbye():
>       print "Goodbye, terminating..."
>   goodbye = atexit.register(goodbye)
> 
> the code registers goodbye but right after it binds goodbye to None!

While it wouldn't hurt to have atexit.register return the function it
registered, this "problem" is only a problem if you wish to call the
function manually, since atexit already registered the reference to the
intended function before your reference to it gets rebound to None.
Normally one would register a function with atexit precisely because
they don't want to call it manually.

-Carsten




From tomasz.kulawik.groups.1 at gmail.com  Sat Nov 25 19:24:46 2006
From: tomasz.kulawik.groups.1 at gmail.com (tomasz.kulawik.groups.1 at gmail.com)
Date: 25 Nov 2006 16:24:46 -0800
Subject: case insensitive dictionary
In-Reply-To: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
Message-ID: <1164500686.593933.221040@f16g2000cwb.googlegroups.com>

John Henry napisal(a):
> I believe the standard dictionary should be amened to allow the use of
> case insensitive keys - as an option.  I found some work done by others
> to do that at:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/283455
>
> but the problem with that approach is that they lowercase the keys
> immediately when you create the dictionary and so the true identity of
> the key is lost.
>
> Of course, I can subclass it and save a copy of the "real" key but
> that's kind of messcy.
>
> In other words:
>
> If I have:
>
>     pets=caselessDict()
>
>     pets["Cat"] = 3
>     pets["Dog"] = 2
>
> I would like to see:
>
>    pets["cat"]  prints 3
>    pets["DOG"] prints 2
>
> but
>
>    print pets.keys()
>
> should print:
>
> "Cat", "Dog"
>
> not:
>
> "cat", "dog"

How about:

>>> class Dictstr(str):
... 	def __hash__(self):
... 		return str.__hash__(self.lower())
... 	def __eq__(self,other):
... 		return self.lower()==other.lower()
...
>>> class dictt(dict):
... 	def __setitem__(self, key, value):
... 		if isinstance(key, str):
... 			dict.__setitem__(self, Dictstr(key), value)
... 		else:
... 			dict.__setitem__(self, key, value)
... 	def __getitem__(self, key):
... 		if isinstance(key, str):
... 			return dict.__getitem__(self, Dictstr(key))
... 		else:
... 			return dict.__getitem__(self, key)
...
>>> d=dictt()
>>> d[1]=1
>>> d['Cat']='Cat'
>>> d['Dog']='Dog'
>>> d['dOg']
'Dog'
>>> d.keys()
[1, 'Dog', 'Cat']

Note that you would need to redefine also __init__, __contains__ and
other methods.



From titogarcia_nospamplease_ at gmail.com  Sun Nov  5 07:38:14 2006
From: titogarcia_nospamplease_ at gmail.com (=?ISO-8859-1?Q?Ernesto_Garc=EDa_Garc=EDa?=)
Date: Sun, 05 Nov 2006 13:38:14 +0100
Subject: Is there a commas-in-between idiom?
Message-ID: <eiklvo$5uj$1@hefestos.uned.es>

Hi experts,

it's very common that I have a list and I want to print it with commas 
in between. How do I do this in an easy manner, whithout having the 
annoying comma in the end?

<code>

list = [1,2,3,4,5,6]

# the easy way
for element in list:
   print element, ',',

print


# this is what I really want. is there some way better?
if (len(list) > 0):
   print list[0],
   for element in list[1:]:
     print ',', element,

</code>

Thx,
Ernesto


From fbuchinger at gmail.com  Thu Nov 30 15:43:45 2006
From: fbuchinger at gmail.com (PicURLPy)
Date: 30 Nov 2006 12:43:45 -0800
Subject: Beautiful Soup Question: Filtering Images based on their width and
	height attributes
Message-ID: <1164919424.990637.98000@h54g2000cwb.googlegroups.com>

Hello,

I want to extract some image links from different html pages, in
particular i want extract those image tags which height values are
greater than 200. Is there an elegant way in BeautifulSoup to do this?



From fredrik at pythonware.com  Mon Nov 13 08:56:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 14:56:22 +0100
Subject: Python development time is faster.
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <ej9ti6$3ev$1@sea.gmane.org>

Chris Brat wrote:

> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
>
> Does anyone have any comments on that statement from personal
> experience?

have you tried writing something in Python, or are you just asking around to
see if it's worth the effort to download it and play with it a little?

</F> 





From sturlamolden at yahoo.no  Sat Nov 25 20:29:22 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 25 Nov 2006 17:29:22 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1164331082.270046.290720@l39g2000cwd.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
Message-ID: <1164504562.834005.197830@l39g2000cwd.googlegroups.com>


Phil Schmidt wrote:

> Thanks for that list. I'm currently in the process of getting quotes
> for a bunch of Matlab tools for hardware-in-the-loop simulation. Big
> bucks.

Yup, and better spent elsewhere...


> I'd love to use Python, but I'm not comfortable with the hardware side
> of that. I'm certain that most, if not all data acquisition hardware
> comes with DLL drivers, which I could interface with using ctypes. I'm
> concerned though about spending more time messing around with the
> hardware interface than it's worth.

Usually you have to mess equally much with Matlab, writing CMEX
interfaces between the DLLs and Matlab. And afterwards you get the
headache of Matlab's single-threaded environment and horrible
pass-by-value sematics.


> Do you have any experience with this side of the Matlab replacement
> question? How about anyone else? Any recommendations?

If you are afraid of doing some C coding or using ctypes, I'd say go
for LabView. When it comes to data acquisition, LabView is far superior
to Matlab. And data acquisition hardware usually comes with LabView
drivers ready to run. LabView can also compile programs that you can
run on real-time OS'es and common DSP chips, so you will not need to
port your code to these targets if you need hard real-time constraints
in your system.

First find out what drivers or APIs are supplied with the hardware.
Then do the decision of which language to use - including Python,
Matlab, LabView, Java, C# .NET, C or C++. I would in any case get a
quote for LabView as well, i does not cost you anything just to obtain
the quote. Generally, development time is far more expensive than
licenses, even with the ultra-expensive Matlab and LabView software.
Using Python just for the sake of using Python is silly.



From bj_666 at gmx.net  Thu Nov 16 14:15:25 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 16 Nov 2006 20:15:25 +0100
Subject: Heap Memory
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
	<ejia35$cfk$1@sea.gmane.org>
	<mailman.283.1163704111.32031.python-list@python.org>
Message-ID: <pan.2006.11.16.19.15.23.540728@gmx.net>

In <mailman.283.1163704111.32031.python-list at python.org>, Gregory Pi?ero
wrote:

> This computer it was running on has 2GB of RAM and 6GB of virtual
> memory so I really doubt I had used up all of that memory.

On 32 bit systems the per process limit is usually 2?GiB, no matter how
much physical and virtual memory you have.

And with 2?GiB and 400000 objects you have about 5?KiB per object.  If
you pickle that huge list there has to be enough memory to hold the
pickled data in memory before it is written to disk.

Ciao,
	Marc 'BlackJack' Rintsch


From torriem at chem.byu.edu  Wed Nov  8 13:27:28 2006
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Wed, 08 Nov 2006 11:27:28 -0700
Subject: PIL - Pixel Level Image Manipulation?
In-Reply-To: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>
References: <312cfe2b0611080853x5e388fbfpb04f2bdb811eafa6@mail.gmail.com>
Message-ID: <1163010448.2436.25.camel@isengard>

On Wed, 2006-11-08 at 11:53 -0500, Gregory Pi?ero wrote:
> I want to be able to randomly change pixels in an image and view the
> results.  I can use whatever format of image makes this easiest, e.g.,
> gray scale, bit tonal, etc.
> 
> Ideally I'd like to keep the pixels in an intermediate format like a
> list of (integers?) or an array and convert that to an image as
> needed.
> 
> I'm hoping someone has some experience on this and could offer some
> advice or code.  I thought it would be easy in PIL  but I'm not sure.

What OS are you using and what GUI library?  These things are specific
to the GUI library you wish to use to display images, and not python
itself (which doesn't care).

> 
> Much Appreciated,
> 
> -- 
> Gregory Pi?ero
> Chief Innovation Officer
> Blended Technologies
> (www.blendedtechnologies.com)



From __peter__ at web.de  Tue Nov 14 06:37:21 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 12:37:21 +0100
Subject: Seeking assistance - string processing.
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<mailman.125.1163500986.32031.python-list@python.org>
	<1163501742.957889.57410@m73g2000cwd.googlegroups.com>
	<ejc81g$32g$00$1@news.t-online.com>
	<1163503056.295402.11410@m7g2000cwm.googlegroups.com>
Message-ID: <ejc9oq$nt0$02$1@news.t-online.com>

billpaterson2006 at googlemail.com wrote:

> Cheers for the reply.
> 
> But I'm still having a spot of bother with the === addition
> 
> it would seem that if there is no whitespace after the ===test
> then the new === gets added to the next line
> 
> e.g file contains:
> 
> ===test (and then no whitesapace/carriage returns or anything)
> 
> and the result is:
> 
> ===test
> ===

You'd get the above with Fredrik's solution if there is a newline. That's
why I put in the rstrip() method call (which removes trailing whitespace)
and added an explicit "\n" (the Python way to spell newline). With my
approach 

if line.startswith("==="):
   line = line.rstrip() + "===\n"

you should always get

===test===(and then a newline)

Peter


From BjornSteinarFjeldPettersen at gmail.com  Sat Nov  4 17:40:19 2006
From: BjornSteinarFjeldPettersen at gmail.com (thebjorn)
Date: 4 Nov 2006 14:40:19 -0800
Subject: how to write code into a blog post?
In-Reply-To: <mailman.1764.1162647888.11739.python-list@python.org>
References: <mailman.1764.1162647888.11739.python-list@python.org>
Message-ID: <1162680019.930647.36130@m7g2000cwm.googlegroups.com>

Jorge Vargas wrote:
> Hi I know many people here blog so sorry for the OT.
>
> Currently I have a wordpress install and went I wanted to post some
> code I notice how painfull it is.

Indeed :-)  I'm using the iG:Syntax Hiliter over on
http://blog.tkbe.org after I got some comments about the lack of
readability of my code samples ;-)  It can be even more colorful than
I've set it up, but it handles a considerable number of languages and
is pretty simple to both use and manage. You can get it at:
http://blog.igeek.info/wp-plugins/igsyntax-hiliter/  I added the
following to the end of the stylesheet to make the code frame bigger
and dynamic:

div.igBar { width: 95%; }
div.syntax_hilite { width:95%; }

hth,
-- bjorn



From Thomas.Ploch at gmx.net  Thu Nov 30 14:08:13 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 20:08:13 +0100
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164913125.509492.54060@79g2000cws.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
Message-ID: <456F2C1D.8070803@gmx.net>

John Henry schrieb:
> If I have a list of say, 10 elements and I need to slice it into
> irregular size list, I would have to create a bunch of temporary
> variables and then regroup them afterwords, like:
> 
> # Just for illustration. Alist can be any existing 10 element list
> a_list=("",)*10
> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> alist=(a,)
> blist=(b,)
> clist=(c1,c2,c3)
> dlist=(d2,d3,d4,d5)
> 
> That obviously work but do I *really* have to do that?
> 
> BTW: I know you can do:
> alist=a_list[0]
> blist=a_list[1]
> clist=a_list[2:5]
> dlist=a_list[5:]
> 
> but I don't see that it's any better.
> 
> Can I say something to the effect of:
> 
> (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work
> 
> ??
> 
> I am asking this because I have a section of code that contains *lots*
> of things like this.  It makes the code very unreadable.
> 
> Thanks,
> 

Nothing in your code actually __is__ a list. they are all tuples...
A list is:
aList = [a,b,c1,c2,c3,d1,d2,d3,d4,d5]

Thomas


From bj_666 at gmx.net  Fri Nov 10 12:36:56 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 10 Nov 2006 18:36:56 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
Message-ID: <pan.2006.11.10.17.36.56.825161@gmx.net>

In <4rjlkqFrlskqU1 at mid.individual.net>, Bjoern Schliessmann wrote:

> Neil Cerutti wrote:
>> On 2006-11-09, Bjoern Schliessmann
> 
>>> if color == red or blue or green:
>>>     return 'primary'
>>>
>>>:)
>  
>> The Inform 6* programming language supports the serial 'or' (and
>> 'and') and looks just like that.
> 
> Python also supports it.

No it doesn't -- look again at the example given above.  It's legal syntax
in Python but doesn't have the semantics implied by the example.

Ciao,
	Marc 'BlackJack' Rintsch


From george.sakkis at gmail.com  Wed Nov  8 03:26:30 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 8 Nov 2006 00:26:30 -0800
Subject: unpickling Set as set
References: <1162967110.642248.54400@m7g2000cwm.googlegroups.com>
	<1162968716.356479.124850@m7g2000cwm.googlegroups.com>
Message-ID: <1162974390.329872.170540@e3g2000cwe.googlegroups.com>

Nick Vatamaniuc wrote:
> The two are not of the same type:
>
> ---------------------------------
> In : import sets
> In : s1=sets.Set([1,2,3])
>
> In : s2=set([1,2,3])
>
> In: type(s1)
> Out: <class 'sets.Set'>
>
> In : type(s2)
> Out: <type 'set'>
>
> In : s1==s2
> Out: False   # oops!
>
> In: s2==set(s1)
> Out: True   # aha!
> ----------------------------------
>
> You'll have to just cast:
>  unpickled_set=set(unpickled_set)
>
> -Nick V.


Or you may have this done automatically by hacking the Set class:

from sets import Set
import cPickle as pickle

Set.__reduce__ = lambda self: (set, (self._data,))

s = Set([1,2,3])
x = pickle.dumps(s)
print pickle.loads(x)


This doesn't work though if you have already pickled the Set before
replacing its __reduce__, so it may not necessarily be what you want.
If there is a way around it, I'd like to know it.

George



From python-url at phaseit.net  Tue Nov  7 15:44:57 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 7 Nov 2006 20:44:57 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov  7)
Message-ID: <eiqr89$20d$1@lairds.us>

QOTW:  "If you want to become a good Python programmer, you really need to
get over that 'I need a oneliner' idea." - Fredrik Lundh
    http://groups.google.com/group/comp.lang.python/msg/9e10957173a20e73

"It is the shortsightedness of the Python core developers that keeps
the palindrome related functions and algorithms out of the standard
library." - Istvan Albert
    http://groups.google.com/group/comp.lang.python/msg/da6ce70ae0f4fe06


    'Near the US capital?  Hear Barry Warsaw introduce Python to
    a public NASA audience:
	http://isandtcolloq.gsfc.nasa.gov/fall2006/speaker/warsaw.html

    Among the most important work going on in the Python world is
    that of the sprints--the recent Duesseldorf one, for example:
	http://codespeak.net/pipermail/pypy-dev/2006q4/003396.html

    pyjamas is a toolkit which facilitates AJAX composition in Python:
	http://pyjamas.pyworks.org/

    Carl Banks is one of the people for whom timing is simple:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/a06186617a253757/

    In principle, Python is great for extending-and-embedding.
    Each of these involves intimidatingly multiple aspects, though,
    as we'll discuss over the next few weeks.  Fredrik Lundh bounds
    one of them:  installation of an adequate development environment
    under Windows:
	http://groups.google.com/group/comp.lang.python/msg/b765eb106cc7a8fc

    PyParsing!?  Sure, it's powerful, and pythonic, but is it really
    appropriate to ... oh, I guess it is.  Paul McGuire releases
    another of his pedagogic salvoes (inadvertently?) devoted to
    surprising things that can be PyParsed:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/43b240a51e3777f0/
    Notice the distinct approaches taken by Fredrik Lundh, Frederic
    Rentsch, ... in the same thread.

    PyQt 4.1 supports Qt 4.2, confusingly enough.  Consequential news
    centers around QtTest (yeah!), QAxContainer, and QGraphicsView:
	http://www.riverbankcomputing.co.uk/news.php

    Fredrik Lundh collects pyidioms:
	http://effbot.org/zone/python-lists.htm

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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From kbk at shore.net  Wed Nov 22 22:36:13 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Wed, 22 Nov 2006 22:36:13 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200611230336.kAN3aD59005113@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  406 open (-10) /  3479 closed (+16) /  3885 total ( +6)
Bugs    :  931 open ( +1) /  6349 closed (+16) /  7280 total (+17)
RFE     :  245 open ( +1) /   244 closed ( +0) /   489 total ( +1)

New / Reopened Patches
______________________

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

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

Logging Module - followfile patch  (2006-11-17)
CLOSED http://python.org/sf/1598426  opened by  chads

mailbox.py: check that os.fsync is available before using it  (2006-11-19)
       http://python.org/sf/1599256  opened by  David Watson

CodeContext - Improved text indentation  (2005-11-21)
CLOSED http://python.org/sf/1362975  reopened by  taleinat

TCPServer option to bind and activate  (2006-11-20)
       http://python.org/sf/1599845  opened by  Peter Parente

__bool__ instead of __nonzero__  (2006-11-21)
       http://python.org/sf/1600346  opened by  ganges master

1572210 doc patch  (2006-11-21)
       http://python.org/sf/1600491  opened by  Jim Jewett

Patches Closed
______________

Logging Module - followfile patch  (2006-11-17)
       http://python.org/sf/1598426  closed by  gbrandl

tkSimpleDialog.askstring()  Tcl/Tk-8.4 lockup  (2006-08-11)
       http://python.org/sf/1538878  closed by  loewis

tkSimpleDialog freezes when apply raises exception  (2006-11-11)
       http://python.org/sf/1594554  closed by  loewis

Tix: subwidget names (bug #1472877)  (2006-10-25)
       http://python.org/sf/1584712  closed by  loewis

better error msgs for some TypeErrors  (2006-10-29)
       http://python.org/sf/1586791  closed by  gbrandl

Auto Complete module for IDLE  (2005-11-19)
       http://python.org/sf/1361016  closed by  loewis

Add BLANK_LINE to token.py  (2004-11-20)
       http://python.org/sf/1070218  closed by  loewis

improve embeddability of python  (2003-11-25)
       http://python.org/sf/849278  closed by  loewis

Extend struct.unpack to produce nested tuples  (2003-11-23)
       http://python.org/sf/847857  closed by  loewis

Iterating closed StringIO.StringIO  (2005-11-18)
       http://python.org/sf/1359365  closed by  loewis

urllib reporthook could be more informative  (2003-11-26)
       http://python.org/sf/849407  closed by  loewis

xmlrpclib - marshalling new-style classes.  (2004-11-20)
       http://python.org/sf/1070046  closed by  loewis

CodeContext - Improved text indentation  (2005-11-21)
       http://python.org/sf/1362975  closed by  loewis

Implementation of PEP 3102 Keyword Only Argument  (2006-08-30)
       http://python.org/sf/1549670  closed by  gvanrossum

readline does not need termcap  (2004-12-01)
       http://python.org/sf/1076826  closed by  loewis

Make cgi.py use logging module  (2004-12-06)
       http://python.org/sf/1079729  closed by  loewis

New / Reopened Bugs
___________________

The empty set is a subset of the empty set  (2006-11-17)
CLOSED http://python.org/sf/1598166  opened by  Andreas Kloeckner

subprocess.py: O(N**2) bottleneck  (2006-11-16)
       http://python.org/sf/1598181  opened by  Ralf W. Grosse-Kunstleve

import curses fails  (2006-11-17)
CLOSED http://python.org/sf/1598357  opened by  thorvinrhuebarb

Misspelled submodule names for email module.  (2006-11-17)
CLOSED http://python.org/sf/1598361  opened by  Dmytro O. Redchuk

ctypes Structure allows recursive definition  (2006-11-17)
       http://python.org/sf/1598620  opened by  Lenard Lindstrom

csv library does not handle '\x00'  (2006-11-18)
CLOSED http://python.org/sf/1599055  opened by  Stephen Day

--disable-sunaudiodev --disable-tk does not work  (2006-10-17)
CLOSED http://python.org/sf/1579029  reopened by  thurnerrupert

mailbox: other programs' messages can vanish without trace  (2006-11-19)
       http://python.org/sf/1599254  opened by  David Watson

htmlentitydefs.entitydefs assumes Latin-1 encoding  (2006-11-19)
CLOSED http://python.org/sf/1599325  opened by  Erik Demaine

SSL-ed sockets don't close correct?  (2004-06-24)
       http://python.org/sf/978833  reopened by  arigo

Segfault on bsddb.db.DB().type()  (2006-11-20)
CLOSED http://python.org/sf/1599782  opened by  Rob Sanderson

problem with socket.gethostname documentation  (2006-11-20)
CLOSED http://python.org/sf/1599879  opened by  Malte Helmert

Immediate Crash on Open  (2006-11-20)
       http://python.org/sf/1599931  opened by  Farhymn

mailbox: Maildir.get_folder does not inherit factory  (2006-11-21)
       http://python.org/sf/1600152  opened by  Tetsuya Takatsuru

[PATCH] Quitting The Interpreter  (2006-11-20)
CLOSED http://python.org/sf/1600157  opened by  Chris Carter

Tix ComboBox entry is blank when not editable  (2006-11-21)
       http://python.org/sf/1600182  opened by  Tim Wegener

--enable-shared links extensions to libpython statically  (2006-11-22)
       http://python.org/sf/1600860  opened by  Marien Zwart

urllib2 does not close sockets properly  (2006-11-23)
       http://python.org/sf/1601399  opened by  Brendan Jurd

utf_8_sig decode fails with buffer input  (2006-11-23)
       http://python.org/sf/1601501  opened by  bazwal

Bugs Closed
___________

The empty set should be a subset of the empty set  (2006-11-17)
       http://python.org/sf/1598166  closed by  gbrandl

import curses fails  (2006-11-17)
       http://python.org/sf/1598357  closed by  akuchling

Misspelled submodule names for email module.  (2006-11-17)
       http://python.org/sf/1598361  closed by  gbrandl

Tix: Subwidget names  (2006-04-19)
       http://python.org/sf/1472877  closed by  loewis

replace groups doesn't work in this special case  (2006-11-06)
       http://python.org/sf/1591319  closed by  gbrandl

csv module does not handle '\x00'  (2006-11-19)
       http://python.org/sf/1599055  closed by  gbrandl

--disable-sunaudiodev --disable-tk does not work  (2006-10-17)
       http://python.org/sf/1579029  closed by  loewis

htmlentitydefs.entitydefs assumes Latin-1 encoding  (2006-11-19)
       http://python.org/sf/1599325  closed by  loewis

where is zlib???  (2006-11-04)
       http://python.org/sf/1590592  closed by  sf-robot

Segfault on bsddb.db.DB().type()  (2006-11-20)
       http://python.org/sf/1599782  closed by  nnorwitz

problem with socket.gethostname documentation  (2006-11-20)
       http://python.org/sf/1599879  closed by  nnorwitz

[PATCH] Quitting The Interpreter  (2006-11-21)
       http://python.org/sf/1600157  closed by  mwh

os.popen w/o using the shell  (2002-04-25)
       http://python.org/sf/548661  closed by  nnorwitz

memory leaks when importing posix module  (2002-09-23)
       http://python.org/sf/613222  closed by  nnorwitz

docs missing 'trace' module  (2003-07-29)
       http://python.org/sf/779976  closed by  nnorwitz

infinite __str__ recursion in thread causes seg fault  (2003-07-31)
       http://python.org/sf/780714  closed by  nnorwitz

python and lithuanian locales  (2003-11-02)
       http://python.org/sf/834452  closed by  nnorwitz

Bus error in extension with gcc 3.3  (2005-06-29)
       http://python.org/sf/1229788  closed by  nnorwitz

New / Reopened RFE
__________________

urllib(2) should allow automatic decoding by charset  (2006-11-19)
       http://python.org/sf/1599329  opened by  Erik Demaine



From steve at REMOVE.THIS.cybersource.com.au  Mon Nov 20 06:41:52 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 20 Nov 2006 22:41:52 +1100
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <pan.2006.11.20.11.41.50.45063@REMOVE.THIS.cybersource.com.au>

On Mon, 20 Nov 2006 09:54:41 +0100, Mathias Panzenboeck wrote:

> Steven D'Aprano wrote:
>> On Sun, 19 Nov 2006 21:35:24 +0100, Mathias Panzenboeck wrote:
>> 
>>> I wrote a few functions which IMHO are missing in python(s itertools).
>>>
>>> You can download them here:
>>> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>>>
>>> A short description to all the functions:
>>>
>>> icmp(iterable1, iterable2) -> integer
>>> 	Return negative if iterable1 < iterable2,
>>> 	zero if iterable1 == iterable1,
>>> 	positive if iterable1 > iterable1.
>> 
>> 
>> What does it mean for an iterable to be less than another iterable? That
>> it has fewer items? How do these two iterables compare?
>> 
>> iter([1, 2, None, "foo", 3+2j])
>> 
>> def ones():
>>     while 1:
>>         yield 1
>> 
>> Which is smaller?
>> 
>> 
> 
> it's like cmp on lists, but on iterables.
> 
> [1,2,3] < [1,2,4]
> [1,2,3] < [1,2,3,0]


But that meaningless, as far as I can see. Lists and iterators aren't the
same thing. A list is a collection; an iterator is not, but it can be
accumulated into a collection.

If equality is meaningful for an object, you should be able to test for
equality without changing the object. But that isn't true for iterators.

Worse, because comparing an iterator consumes items, you can easily get
crazy results like the following:


>>> L = [1, 2, 3, 4, 5]
>>> def it():
...     yield 5; yield 0; yield 0; yield 0; yield 0
... 
>>> it = it()

Now, we can compare the first item of L with the first item of it:

>>> L[0] < it.next()  # if True, L < it
True

So L must be less than it, right? Let's print both objects out in full to
check:

>>> print L
[1, 2, 3, 4, 5]
>>> print list(it) # if L < it, it must be > L
[0, 0, 0, 0]

Oops.

I think the GENERAL concept of comparison between iterators is
meaningless. A lazy comparison between the items of an iterator and some
other iterable may be a useful thing to do, but as a general concept,
saying that an iterator compares bigger or smaller or equal to something
else doesn't make sense, since the mere fact that you make that comparison
will change the iterator.


-- 
Steven.



From johnjsal at NOSPAMgmail.com  Thu Nov  2 22:08:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 02 Nov 2006 22:08:56 -0500
Subject: what's the difference between these two methods? (aka,   why
	doesn't one of them work?)
In-Reply-To: <mailman.1693.1162503254.11739.python-list@python.org>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>	<eidlah$v0m$01$1@news.t-online.com>	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>	<mailman.1692.1162502583.11739.python-list@python.org>	<1162502862.141973.324040@h48g2000cwc.googlegroups.com>
	<mailman.1693.1162503254.11739.python-list@python.org>
Message-ID: <454ab2e3$0$17722$c3e8da3@news.astraweb.com>

Fredrik Lundh wrote:
> JohnJSal wrote:
> 
>> That's a perfectly valid comment, but in this case just not applicable.
>> I spent a lot of time working through my original question before
>> posting, but I just couldn't get it.
> 
> how do you fit "a lot of time" into 18 minutes?
> 
> </F>
> 

Hmmm, I had tried to cancel sending that post but I guess it didn't 
work. As I was sending it, I said to myself, "well, maybe I didn't spend 
enough time before asking."

But I guess rather than "a lot of time", I'm thinking I tried "a lot of 
things," or at least all I could think of.


From soloag at crohammount.freeserve.co.uk  Sun Nov  5 19:54:40 2006
From: soloag at crohammount.freeserve.co.uk (Roy Travis)
Date: Mon, 6 Nov 2006 01:54:40 +0100
Subject: squawk
Message-ID: <AFB6011.A1CA33CF1@ctam.fr>

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From paul at boddie.org.uk  Wed Nov 29 06:51:22 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 29 Nov 2006 03:51:22 -0800
Subject: shtoom or yate client source code
References: <1164798584.493809.121110@j44g2000cwa.googlegroups.com>
Message-ID: <1164801082.546570.83940@h54g2000cwb.googlegroups.com>

Croteam wrote:
>
> Can somebody give me (if is that possible) source code of shtoom or
> yate client

Take a look at the SourceForge downloads page for Shtoom:

http://sourceforge.net/project/showfiles.php?group_id=94774

The project is actually hosted at divmod.com...

http://www.divmod.org/trac/wiki/ShtoomProject

...and although the repository doesn't seem to be viewable via the
"Browse Source" link on that page, the stated link to the repository
does work with Subversion.

Paul



From norbert at akumakun.de  Sun Nov  5 06:40:54 2006
From: norbert at akumakun.de (Norbert Kaufmann)
Date: Sun, 05 Nov 2006 12:40:54 +0100
Subject: small python cgi webserver
In-Reply-To: <mailman.1768.1162650563.11739.python-list@python.org>
References: <mailman.1760.1162630079.11739.python-list@python.org>	<1162635479.491109.15640@h54g2000cwb.googlegroups.com>	<mailman.1761.1162636919.11739.python-list@python.org>	<eii08d$8ki$1@online.de>
	<mailman.1768.1162650563.11739.python-list@python.org>
Message-ID: <eikijf$i6r$1@online.de>

Fabian Braennstroem wrote:
[...]
>>In your response (cgi-script) you have to divide the header from the
>>content '\r\n\r\n'.
> 
> 
> I am not sure, what that means!?  ... but it works :-)
> 

We are talking about HTTP, take a look at the HTTP response in version 1.1:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6

As you may see you separate the header of a response from the body by an
empty line, generated with CRLF.
Since one CRLF ends the line inside the header you need two of them.

Bye

Norbert


From jeff at taupro.com  Mon Nov 13 07:45:06 2006
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 13 Nov 2006 06:45:06 -0600
Subject: An Invitation to Get Involved in Python Advocacy
Message-ID: <455868D2.1020903@taupro.com>

I'd like to extend an invitation to those who would like to get involved in 
advocating the use of Python.  In August, the PSF hired me, for a 6-mo 
contract, to coordinate the Python advocacy effort.  Since then I've been 
working to make the next PyCon one of the best conferences yet, and putting in 
place the infrastructure of a newcomer portal (http://advocacy.python.org) 
focused on drawing in those people who don't know much about Python but have 
developed an interest for various reasons.  The portal also has an entry point 
(http://advocacy.python.org/getinvolved) to organize the materials and 
activities of those already in the Python community who want to get involved. 
I've also established a new mailing list <advocacy at python.org> on which to 
discuss advocacy, replacing the <marketing-python at wingide.com> list, and a 
blog.(http://python-advocacy.blogspot.com) for keeping the Python community 
up-to-date about advocacy goings on.  The blog is aggregated into the official 
Planet Python (but I can't seem to reach the coordinator of the *unofficial* 
Planet Python).

A bit about the newcomer portal to place it in context; the portal is designed 
to help someone who has just become aware of Python decide if the language is 
right for them.  It seeks to quickly direct visitors to the information they 
want, and bring to their attention how diverse and vibrant the support for 
Python is.  The audience is not only programmers but also journalists, project 
managers, scientists/engineers, recruiters and educators.  Different audiences 
come at Python with different needs and often need different explanations. 
And some  are indeed programmers, but using other languages, who wonder how 
Python compares to what they are using now.

For the newcomer portal we have a need for content writers to focus on 
specific problem domains, for the various subcommunities to provide technology 
roadmaps and representative samples of source code that would entice someone 
to check them out.  As one example, the SciPy/NumPy group could write about 
what makes their software attractive to the scientific community and provide 
one-page sources that illustrates certain common operations, to show off the 
clarify and expressiveness of Python.  I've found plenty of material on the 
SciPy website that I'm weaving into the newcomer portal.

The portal is not designed to replace what we have at www.python.org but to 
complement it, and to serve as an organizing point for the extensive content 
already on www.python.org and elsewhere.  The portal also specifically 
supports dynamic content, relational database storage of information and easy 
plug-in of new components to add new features.  Such features will eventually 
include, among other things, a searchable roster of user groups, a registry of 
speakers and trainers and a catalog of books about Python, each with RSS feeds 
where appropriate.

And for the curious, the portal is written using the Zope 3 component system, 
building on the underlying Twisted subsystem for internal background 
scheduling and hooked to a PostgreSQL database.  The site makes use of Zope 3 
viewlets to provide pluggable display elements, reStructured text documents 
for a clean separation between content and infrastructure, and Nabu for 
synchronization of document collections into the indexing engine and 
persisting of the reST DOMs to enable content manipulation at presentation 
time according to what is to be viewed (biblio data, abstracts, content).  The 
portal is located on the python.org servers and all software and content are 
checked into svn.python.org.

In closing, I am greatly honored by the trust of the foundation members in me 
and hope to serve the community well.  As coordinator, I invite others to get 
involved and will strive to provide an assistive environment within which 
everyone can be productive.  The primary discussion area is the new mailing 
list which can be joined at:

   http://mail.python.org/mailman/listinfo/advocacy

and a list of what is needed is at:

   http://advocacy.python.org/getinvolved

I am also maintaining a list of accomplishments and near-term To-Do's for 
myself at:

   http://wiki.python.org/moin/PythonAdvocacyCoordinator

Jeff Rush
Python Advocacy Coordinator


From fredrik at pythonware.com  Fri Nov 17 03:14:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 09:14:48 +0100
Subject: Yield
In-Reply-To: <1163691173.737911.130410@i42g2000cwa.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>	<455c15ca$1@news.eftel.com>	<mailman.227.1163664079.32031.python-list@python.org>	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
Message-ID: <ejjr1o$615$1@sea.gmane.org>

Danny Colligan wrote:

> Carsten mentioned that generators are more memory-efficient to use when
> dealing with large numbers of objects.  Is this the main advantage of
> using generators?  Also, in what other novel ways are generators used
> that are clearly superior to alternatives?

the main advantage is that it lets you decouple the generation of data 
from the use of data; instead of inlining calculations, or using a pre- 
defined operation on their result (e.g printing them or adding them to a 
container), you can simply yield them, and let the user use whatever 
mechanism she wants to process them.  i.e. instead of

     for item in range:
         calculate result
         print result

you'll write

     def generate():
         for item in range:
             yield result

and can then use

     for item in generate():
         print item

or

    list(process(s) for s in generate())

or

    sys.stdout.writelines(generate())

or

    sum(generate())

etc, without having to change the generator.

you can also do various tricks with "endless" generators, such as the 
following pi digit generator, based on an algorithm by Python's grand- 
father Lambert Meertens:

def pi():
     k, a, b, a1, b1 = 2, 4, 1, 12, 4
     while 1:
         # Next approximation
         p, q, k = k*k, 2*k+1, k+1
         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
         # Yield common digits
         d, d1 = a/b, a1/b1
         while d == d1:
             yield str(d)
             a, a1 = 10*(a%b), 10*(a1%b1)
             d, d1 = a/b, a1/b1

import sys
sys.stdout.writelines(pi())

</F>



From rupole at hotmail.com  Wed Nov  8 16:56:24 2006
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 8 Nov 2006 16:56:24 -0500
Subject: Change directory permission under windows
References: <1163000710.228610.112020@m73g2000cwd.googlegroups.com>
Message-ID: <1163023198_1@sp6iad.superfeed.net>


__schronos__ wrote:
> Hi.
>
>  I would like to add users with full control access to a directory. I
> can do it to a file in the following way:
>
> info=win32security.DACL_SECURITY_INFORMATION
> sd=win32security.GetFileSecurity(DIR, info)
> acl=sd.GetSecurityDescriptorDacl()
> sidUser=win32security.LookupAccountName(None,USER)[0]
> acl.AddAccessAllowedAce(win32file.FILE_ALL_ACCESS, sidUser)
> sd.SetSecurityDescriptorDacl(1, acl, 0)
> win32security.SetFileSecurity(dir, info, sd)
>
> and it work correctly, but if I try to do the same to a directory only
> the "special permission" checkbox is checked and this is not useful to
> me because I need a "full control" so that files under the directory
> can inheritage the directory rigths.
>
> Can anybody help me
>
> Thank's
>
AddAccessAllowedAce doesn't have a parm for inheritance flags.
Try AddAccessAllowedAceEx instead:

acl.AddAccessAllowedAceEx(win32security.ACL_REVISION_DS,
    win32security.OBJECT_INHERIT_ACE|win32security.CONTAINER_INHERIT_ACE,
    win32file.FILE_ALL_ACCESS, sidUser)

       Roger



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From simon at brunningonline.net  Mon Nov 13 11:57:31 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 13 Nov 2006 16:57:31 +0000
Subject: explicit self revisited
In-Reply-To: <ej8cu7$vtt$1@sea.gmane.org>
References: <ej5fuv$a4a$1@online.de>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2119.1163289905.11739.python-list@python.org>
	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>
	<1163351573.3497.26.camel@localhost.localdomain>
	<ej7m2l$tsm$1@sea.gmane.org> <ej8cu7$vtt$1@sea.gmane.org>
Message-ID: <8c7f10c60611130857x611a4630y353d801275c67777@mail.gmail.com>

On 11/13/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> > I suppose that in his view, language advocacy is a zero-sum game, so
> > positive comments about Python can be considered as FUD against his own
> > project.  He's even invented his own del.icio.us tag for this purpose:
> >
> >      http://del.icio.us/tag/pythonfud
>
> now at:
>
>      http://del.icio.us/tag/python-fud
>
> </F>

Hey, Fredrik, you have your own tag!
<http://del.icio.us/tag/fredrik-lundh-troll> I wish *I* had my own
tag. ;-)

I notice that, as you predicted, Python's lack of a goto is in there too.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From ronrsr at gmail.com  Mon Nov 13 15:34:25 2006
From: ronrsr at gmail.com (ronrsr)
Date: 13 Nov 2006 12:34:25 -0800
Subject: Printing database output in tabular form
In-Reply-To: <mailman.88.1163447419.32031.python-list@python.org>
References: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
	<mailman.88.1163447419.32031.python-list@python.org>
Message-ID: <1163450065.303226.133790@f16g2000cwb.googlegroups.com>

I just changed the database to be a TEXT field, and that took care of
the array() stuff - Now, I'm trying to convert the formatting codes to
html. 

thanks for your help. 

bests, 

r0sr-



From johnjsal at NOSPAMgmail.com  Wed Nov  8 16:33:17 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 16:33:17 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <eith0g$t7e$02$1@news.t-online.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45523133$0$14421$c3e8da3@news.astraweb.com>
	<eith0g$t7e$02$1@news.t-online.com>
Message-ID: <45524d03$0$32427$c3e8da3@news.astraweb.com>

Peter Otten wrote:

> Try it: Fighter(...) will implicitly call Character.__init__(...).

Ok, I'm confused! :) I thought you had to explicity call a base class's 
__init__ method? How is it doing this?


From duncan.booth at invalid.invalid  Thu Nov 23 07:24:24 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Nov 2006 12:24:24 GMT
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
	<pan.2006.11.23.11.27.54.956445@REMOVE.THIS.cybersource.com.au>
	<Xns98848020C9BB8toreriknpolarno@129.242.5.222>
Message-ID: <Xns98847E3851656duncanbooth@127.0.0.1>

Tor Erik Soenvisen <toreriks at hotmail.com> wrote:

> I've seen code like this:
> 
> if type([]) is list:
>          print 'Is list'
> 
> which seem to work.

'seem to work' is correct. Occasionally 'type(x) is list' is exactly what 
is needed, but much more likely it is a potential bug.

It is more likely that what was intended was: isinstance(x, list)

It is even more likely that the intention was that the object should have 
some list-like behaviour, in which case not doing a test at all is the 
correct behaviour; or quite often that the object should be list-like but 
not a string in which case testing the type against basestring would be 
correct. e.g.:

if isinstance(x, basestring):
   x = [x]
# ... now just assume x is a suitable sequence ...
for element in x:
   ...


From wescpy at gmail.com  Thu Nov  9 04:24:10 2006
From: wescpy at gmail.com (wesley chun)
Date: Thu, 9 Nov 2006 01:24:10 -0800
Subject: opening excel
Message-ID: <78b3a9580611090124g4a6f9086g2c1211faebfcd5a4@mail.gmail.com>

> has anybody got any experience opening and manilpulating excel
> spreedsheets via python? it seems pythoncom allows this to happen


i posted a couple of snippets along with others in this earlier thread:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/a7ed60067ca5a8d4

the XLRD package is a platform-independent non-COM way to *extract*
Excel data. you mentioned opening and manipulating spreadsheets
*using* COM, so there are more examples targeted towards what you were
asking for at that link.

i added a small section on Win32 COM client programming to the Core
Python book, and although it doesn't go extremely in-depth, it's
perfectly targeted to "newbs" coming from the Unix world, as was i.

hope this helps!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From __peter__ at web.de  Wed Nov 29 11:26:01 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 29 Nov 2006 17:26:01 +0100
Subject: Overloading "if object" unary operator
References: <1164817022.500511.295260@80g2000cwy.googlegroups.com>
Message-ID: <ekkc9b$hi7$02$1@news.t-online.com>

Sarcastic Zombie wrote:

> is there any way to overload the 'if' unary usage to detect if a
> variable has a value?

Define a __nonzero__() or __len__() method.

Peter




From mike at hobbshouse.org  Thu Nov  9 11:41:58 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Thu, 09 Nov 2006 10:41:58 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163089657.164900.112820@f16g2000cwb.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
Message-ID: <45535A56.7020203@hobbshouse.org>

Paul Boddie wrote:
> Michael Hobbs wrote:
>   
>> I think the colon could be omitted from every type of compound
>> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
>>     
>
> The FAQ answer. ;-)
>
> http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements
>
> Paul
>   
I knew there was a document somewhere that I missed. ;-) I even scanned 
all the Py3K PEPs before posting. Anyway, the FAQ answer seems to be a 
weak argument to me. But if the BDFL insists that it remains, why not 
take the converse approach? That is, assume that the expression ends at 
the colon, not at the newline. That would make this type of statement 
possible:
    if color == red or
      color == blue or
      color == green:
        return 'primary'
Right now, such a statement would have to be spelled thus:
    if color == red or \
      color == blue or \
      color == green:
        return 'primary'
or
    if (color == red or
      color == blue or
      color == green):
        return 'primary'


From anderslanglands at gmail.com  Wed Nov 22 12:01:28 2006
From: anderslanglands at gmail.com (anders)
Date: 22 Nov 2006 09:01:28 -0800
Subject: PyQt app in seperate thread
In-Reply-To: <4sjd17FvqtpmU1@mid.uni-berlin.de>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
	<1164206635.601219.36860@j44g2000cwa.googlegroups.com>
	<4sjd17FvqtpmU1@mid.uni-berlin.de>
Message-ID: <1164214888.287285.153720@m7g2000cwm.googlegroups.com>


Diez B. Roggisch wrote:
> > OK I see that now. Thanks for pointing that out. So basically, I can't
> > do what I want at all. That's a bit of a pain. Is there no way of
> > tricking Qt into thinking I'm running it in the main thread?
>
> Maybe you can either invert the thread-roles - that is, run your "main"
> application in a thread, and if needed start the Qt-thing, or you might
> consider spawning a process and using pyro. Which will work very neat, done
> so myself.
>
> Diez

Yeah I was thinking that's going to have to be the way to go... I can't
run the main app in a child thread, so I'll have to spawn the GUI as a
seperate process and communicate with it. Didn't know about pyro
though, thanks for the link. You've used it successfully with PyQt in a
seperate process?

Cheers,

Anders



From msherman77 at yahoo.com  Thu Nov  2 12:45:48 2006
From: msherman77 at yahoo.com (Michael S)
Date: Thu, 2 Nov 2006 12:45:48 -0500 (EST)
Subject: is mod_python borked?
In-Reply-To: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <20061102174548.50663.qmail@web88304.mail.re4.yahoo.com>

I used it for various projects. It's alright.
The only problem I had, was that I was unable to get
mod_python and pysqlite to work together.
Other than that it was pretty good.

--- walterbyrd <walterbyrd at iname.com> wrote:

> I am considering python, instead of php, for
> web-application
> development. I often see mod_python.criticisized as
> being borked,
> broken, or just plain sucking.
> 
> Any truth to any of that?
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From rvernica at gmail.com  Wed Nov  1 19:32:52 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Wed, 01 Nov 2006 16:32:52 -0800
Subject: unescape HTML entities
In-Reply-To: <45449EAC.4070103@vtxmail.ch>
References: <ei0add$man$1@sea.gmane.org> <45449EAC.4070103@vtxmail.ch>
Message-ID: <eibea7$m77$1@sea.gmane.org>

Hi,

Nice module!

I downloaded 2.3 and I started to play with it. The file names have 
funny names, they are all caps, including extension.

For example the main module file is "SE.PY". Is you try "import SE" it 
will not work as Python expects the file extension to be "py".

Thanks,
Ray

Frederic Rentsch wrote:
> Rares Vernica wrote:
>> Hi,
>>
>> How can I unescape HTML entities like "&nbsp;"?
>>
>> I know about xml.sax.saxutils.unescape() but it only deals with "&amp;", 
>> "&lt;", and "&gt;".
>>
>> Also, I know about htmlentitydefs.entitydefs, but not only this 
>> dictionary is the opposite of what I need, it does not have "&nbsp;".
>>
>> It has to be in python 2.4.
>>
>> Thanks a lot,
>> Ray
>>
> One way is this:
> 
>  >>> import SE                                                      # 
> Download from http://cheeseshop.python.org/pypi/SE/2.2%20beta
>  >>> SE.SE ('HTM2ISO.se')('input_file_name', 'output_file_name')    # 
> HTM2ISO.se is included
> 'output_file_name'
> 
> For repeated translations the SE object would be assigned to a variable:
> 
>  >>> HTM_Decoder = SE.SE ('HTM2ISO.se')
> 
> SE objects take and return strings as well as file names which is useful 
> for translating string variables, doing line-by-line translations and 
> for interactive development or verification. A simple way to check a 
> substitution set is to use its definitions as test data. The following 
> is a section of the definition file HTM2ISO.se:
> 
> test_string = '''
> &oslash;=(xf8)   #  248  f8
> &ugrave;=(xf9)   #  249  f9
> &uacute;=(xfa)   #  250  fa
> &ucirc;=(xfb)    #  251  fb
> &uuml;=(xfc)     #  252  fc
> &yacute;=(xfd)   #  253  fd
> &thorn;=(xfe)    #  254  fe
> &#233;=(xe9)
> &#234;=(xea)
> &#235;=(xeb)
> &#236;=(xec)
> &#237;=(xed)
> &#238;=(xee)
> &#239;=(xef)
> '''
> 
>  >>> print HTM_Decoder (test_string)
> 
> ?=(xf8)   #  248  f8
> ?=(xf9)   #  249  f9
> ?=(xfa)   #  250  fa
> ?=(xfb)    #  251  fb
> ?=(xfc)     #  252  fc
> ?=(xfd)   #  253  fd
> ?=(xfe)    #  254  fe
> ?=(xe9)
> ?=(xea)
> ?=(xeb)
> ?=(xec)
> ?=(xed)
> ?=(xee)
> ?=(xef)
> 
> Another feature of SE is modularity.
> 
>  >>> strip_tags = '''
>    ~<(.|\x0a)*?>~=(9)               # one tag to one tab
>    ~<!--(.|\x0a)*?-->~=(9)          # one comment to one tab
> |                                   # run
>    "~\x0a[ \x09\x0d\x0a]*~=(x0a)"   # delete empty lines
>    ~\t+~=(32)                       # one or more tabs to one space
>    ~\x20\t+~=(32)                   # one space and one or more tabs to 
> one space
>    ~\t+\x20~=(32)                   # one or more tab and one space to 
> one space
> '''
> 
>  >>> HTM_Stripper_Decoder = SE.SE (strip_tags + ' HTM2ISO.se ')   # 
> Order doesn't matter
> 
> If you write 'strip_tags' to a file, say 'STRIP_TAGS.se' you'd name it 
> together with HTM2ISO.se:
> 
>  >>> HTM_Stripper_Decoder = SE.SE ('STRIP_TAGS.se  HTM2ISO.se')   # 
> Order doesn't matter
> 
> Or, if you have two SE objects, one for stripping tags and one for 
> decoding the ampersands, you can nest them like this:
> 
>  >>> test_string = "<p class=MsoNormal 
> style='line-height:110%'><i>Ren&eacute;</i> est un gar&ccedil;on qui 
> para&icirc;t plus &acirc;g&eacute;. </p>"
> 
>  >>> print Tag_Stripper (HTM_Decoder (test_string))
>   Ren? est un gar?on qui para?t plus ?g?.
> 
> Nesting works with file names too, because file names are returned:
> 
>  >>> Tag_Stripper (HTM_Decoder ('input_file_name'), 'output_file_name')
> 'output_file_name'
> 
> 
> Frederic
> 
> 
> 



From paul at boddie.org.uk  Thu Nov 23 18:31:13 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Nov 2006 15:31:13 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<mailman.620.1164259740.32031.python-list@python.org>
	<1164309875.039952.77740@m7g2000cwm.googlegroups.com>
Message-ID: <1164324673.345115.93690@m7g2000cwm.googlegroups.com>

Klaas wrote:
> Tennessee writes:
> >    * If you say LaTex, I'll eat your brain. Or my hat. Unless I'm
> > seriously underrating it, but I don't think so.
>
> Why?  It is a suitable solution to this problem.  You can produce
> unformatted content, then produce pdf and html pages from it.

Sure, LaTeX probably has some way of producing a reasonable layout, or
at least TeX will be able to do it, but by then you're in a sea of
backslashes and eating the factory that makes the hats.

Paul

P.S. I know it's a bit unfair to pour scorn on LaTeX - after all, if I
were writing a long report or paper, I'd probably consider using it
(with LyX, I imagine) - but dealing with layout issues in the W3C
family of technologies (CSS, XSL-FO, anything using the same basic
layout model) is a more attractive predicament, despite the
occasionally bizarre and generally lengthy specifications.



From saikrishbe at gmail.com  Tue Nov 21 14:20:16 2006
From: saikrishbe at gmail.com (Sai Krishna M)
Date: Wed, 22 Nov 2006 00:50:16 +0530
Subject: How good is CORBA?
In-Reply-To: <20061121190127.83586.qmail@web88305.mail.re4.yahoo.com>
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
	<20061121190127.83586.qmail@web88305.mail.re4.yahoo.com>
Message-ID: <6559fb300611211120n19bfeb27q34d0ae1f452d8c45@mail.gmail.com>

On 11/22/06, Michael S <msherman77 at yahoo.com> wrote:

> If you are using Python only, language neutrality
> doesn't really help. You said you're writing web-based
> applications, and you didn't specify whether you had
> client/server interaction, so I don't know whether you
> need it or not.
there are certainly client/server interactions..
-- 
I love Freedom


From dlenski at gmail.com  Thu Nov  9 17:51:31 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 14:51:31 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <slrnel6vs2.17k.wojciech_mula@cat.tac>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<slrnel6vs2.17k.wojciech_mula@cat.tac>
Message-ID: <1163112691.552233.130650@e3g2000cwe.googlegroups.com>

One other thing I'm wondering: how exactly does Tkinter work?  Is the
whole Tk toolkit bound up as library of low-level C code, or does
Tkinter sit on top of a Tcl interpreter?

If the latter, that might explain why it is frustratingly slow on
Cygwin... since Cygwin is not very good at starting up new processes in
a timely manner.

Dan



From stefan.behnel-n05pAM at web.de  Wed Nov 22 03:15:00 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Nov 2006 09:15:00 +0100
Subject: Quadratic Optimization Problem
In-Reply-To: <1164152033.306124.126290@e3g2000cwe.googlegroups.com>
References: <1164152033.306124.126290@e3g2000cwe.googlegroups.com>
Message-ID: <45640704$0$5711$9b4e6d93@newsspool3.arcor-online.net>

amitsoni.1984 at gmail.com wrote:
> I need to do a quadratic optimization problem in python where the
> constraints are quadratic and objective function is linear.
> 
> What are the possible choices to do this.

Too bad these homework assignments get trickier every time, isn't it?

Stefan


From faulkner612 at comcast.net  Thu Nov 30 10:52:40 2006
From: faulkner612 at comcast.net (faulkner)
Date: 30 Nov 2006 07:52:40 -0800
Subject: question on pygtk and accessibility on windows.
In-Reply-To: <mailman.876.1164881004.32031.python-list@python.org>
References: <mailman.876.1164881004.32031.python-list@python.org>
Message-ID: <1164901960.250485.18930@l12g2000cwl.googlegroups.com>

if by 'accessibility' you mean 'usable' (like python and firefox are
usable), then yes. there are pygtk bindings for windows, and they work.
http://python-forum.org/py/viewtopic.php?t=116
if by 'accessibility' you mean 'usable for the blind/deaf', then i
think that is up to you as an application developer.

krishnakant Mane wrote:
> has any one tried py gtk on windows?
> I tried to do a google search for accessibility related issues but did
> not find any thing specific to pygtk and windows accessibility.
> I even tried to search for just gtk and windows accessibility but
> again no result.
> so I am now posting this message as a last hope to at least get a "yes
> " or "no " answer on whether py gtk is accessible with windows.
> thanks.
> Krishnakant.



From icebergwtf at yahoo.com.cn  Thu Nov  9 20:51:46 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Fri, 10 Nov 2006 09:51:46 +0800 (CST)
Subject: Simple question to split
Message-ID: <20061110015146.65790.qmail@web15006.mail.cnb.yahoo.com>

Matthias Winterland wrote:
> Hi,
>
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
> single split-call?
>
> Thx,
> Matthias

Maybe like this:

>>> a = "1,2,3,4,5,6,7,3,4"
>>> l = [int(n) for n in a.split(',')]
>>> l
[1, 2, 3, 4, 5, 6, 7, 3, 4]
>>>


		
___________________________________________________________ 
??????-3.5G???20M?? 
http://cn.mail.yahoo.com/


From jordan.taylor2 at gmail.com  Wed Nov  1 14:42:06 2006
From: jordan.taylor2 at gmail.com (Jordan)
Date: 1 Nov 2006 11:42:06 -0800
Subject: 3d programming without opengl
In-Reply-To: <mailman.1538.1162294645.11739.python-list@python.org>
References: <mailman.1526.1162280594.11739.python-list@python.org>
	<iHD1h.25601$GR2.12249@tornado.texas.rr.com>
	<ABE1h.25602$GR2.24371@tornado.texas.rr.com>
	<mailman.1538.1162294645.11739.python-list@python.org>
Message-ID: <1162410125.954506.122630@b28g2000cwb.googlegroups.com>

I don't thnk you should have any problems using Slut with wxpython - wx
would be much less amazing if it couldn't do something like that.  On
the other hand, I thought that you were looking for something that
doesn't use openGL and I think that Slut is built around it.

Cheers,
Jordan

nelson - wrote:
> Hi paul,
>  i look at slut and it seem very good... Can i embed it into a
> wxpython application?
> 
> thanks,
>  nelson



From robert.kern at gmail.com  Sat Nov 11 20:59:20 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 11 Nov 2006 19:59:20 -0600
Subject: reduce to be removed?
In-Reply-To: <1163288885.884417.218270@f16g2000cwb.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
Message-ID: <ej5v64$3b3$1@sea.gmane.org>

Dustan wrote:
> Fredrik Lundh wrote:

>> if you care about writing robust code, why not just use a for-loop,
>> and the list extend method?
> 
> Because I'm embedding this expression in a list comprehension (as I
> stated in my original post), and last time I checked, it's not possible
> to treat a for-loop as an expression (which is what a list
> comprehension requires).

As with all such things, you stick the implementation in a well-named function
and simply call the function everywhere. The implementation never needs to be a
one-liner expression.

-- 
Robert Kern

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



From utabintarbo at gmail.com  Thu Nov  2 08:11:08 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 2 Nov 2006 05:11:08 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <1162454940.754955.272160@h48g2000cwc.googlegroups.com>
References: <mailman.1542.1162296580.11739.python-list@python.org>
	<1162331694.836988.322220@m73g2000cwd.googlegroups.com>
	<mailman.1638.1162446948.11739.python-list@python.org>
	<1162454940.754955.272160@h48g2000cwc.googlegroups.com>
Message-ID: <1162473068.259969.320290@k70g2000cwa.googlegroups.com>


Glenn Hutchings wrote:
> I haven't seen mention of HTMLgen, another python package.  Check it
> out at:
>
>     http://starship.python.net/crew/friedrich/HTMLgen/html/main.html
>
> Glenn

For whatever reason, the Starship (hence that link) has been down for a
while. :-(

But I do agree that HTMLgen is worthy of consideration (I use it
myself).



From steve at holdenweb.com  Mon Nov 13 04:25:02 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:25:02 -0600
Subject: httplib continuation packets
In-Reply-To: <slrnelco15.m2m.hakonrk@fox.venod.com>
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>	<mailman.2112.1163284210.11739.python-list@python.org>	<slrnelck6n.lf8.hakonrk@fox.venod.com>	<mailman.2113.1163286222.11739.python-list@python.org>
	<slrnelco15.m2m.hakonrk@fox.venod.com>
Message-ID: <ej9dj5$8f2$1@sea.gmane.org>

Haakon Riiser wrote:
> [Fredrik Lundh]
> 
>> Haakon Riiser wrote:
>>
>>> Yes, and it doesn't help.
>> then the server is mostly likely broken beyond repair.
> 
> It's not in my power to upgrade the server, unfortunately.
> Guess I'll have to use Perl.
> 
>> to see if this really is the problem, you could try moving the call to 
>> self._send_output() from the end of the endheaders() method to the end 
>> of the _send_request() method (around line 870 in httplib.py, at least 
>> in 2.5).
> 
> Tried this, but the tcpdump still looks the same (two packets: one
> with the headers, one with the body), and now it fails with
> 
> urllib2.HTTPError: HTTP Error 501: Not Implemented
> 
> Nevertheless, I'm fairly sure that the packet fragmentation is
> the culprit.  It works perfectly with Perl, even when I make
> no effort at all to spoof the browser (no user-agent, referer,
> cookies, etc.).
> 
It really does seem quite bizarre that a server should respond 
differently to the same TCP request when it is split differently into IP 
datagrams.

There really is nothing wrong (from a standards point of view) with 
sending FIN with your last data segment. FIN means "I guarantee to send 
no more data, and will continue to acknowledge your segments until I see 
your FIN".

Are you planning to report this bug to Ipswitch? It certainly sounds 
like someone should.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From webmaster at cacradicalgrace.org  Thu Nov  2 09:46:27 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Thu, 02 Nov 2006 07:46:27 -0700
Subject: create global variables?-the full story
References: <1162275890.4546ec32cd351@www2.helsinki.fi>	<ei732n$2hg$1@sea.gmane.org>	<45471B66.9060702@helsinki.fi>	<ei76rh$f4p$1@sea.gmane.org>
	<mailman.1537.1162294403.11739.python-list@python.org>
Message-ID: <eid0jn$phb$1@web.aioe.org>

> OK...
> 
> from the start.
> 
> im trying to develop a simple command line application for determining
> the degree of substitution (DS) on a polymer backbone from elemental
> analysis, i.e., the % weights of different elements in the
> monomer-substituent compound ( i want each element to give a result and
> heaviest atoms give the most accurate results).
> 
> most basic comp chem programs use input files but i dont know anything
> about file iteration yet and want the program to be as user friendly as
> possible..i.e. command line prompt. GUI would be great but too much for
> me at this stage
> 
> at the start of the script i have 2 dictionaries 1) containing every
> atom in the periodic table with associated isotopic average masses 2)
> containing the molecular forumla of the monomer unit...eg for cellulose
> AGU {'C': 6, 'H': 10, 'O': 5}.
> 
> the basic steps are
> 
> 1. calculate the weight percentage values for each atom in the monomer
> 2. iterate into dictionaries from DS=0 - DS=15 (0.00005 step) the
> projected % values for the monomer plus substituent, for EACH atom in
> the compound.
> 3. find the (local) minimum from each dictionary/atom to give the
> appropriate DS value.
> 
> *Note* I have to iterate ALL the values as there is a non-linear
> relationship between % values and DS due to the different atomic weights
> The computer seems to cope with this in about 10 seconds with the above
> parameters and about 8 elements for the iteration step
> 

Since you have a parallel structure for each element, consider using a 
dictionary with the element names as keys:

 >>> atomicdata = {}
 >>> for element in 'C','H','U':
...	atomicdata[element] = getAtomVars(element)
...
 >>> print atomicdata
{ 'C': (1, 2), 'H': (4, 5), 'U': (78, 20) }

The first value of each tuple will be your Xaa, and the second value 
will be Xma.  Do you really need to keep the names Caa, Cma, Haa, Hma 
around?  Instead of Caa, you have atomicdata['C'][0] and Cma becomes 
atomicdata['C'][1].  Completely unambiguous.  A bit more verbose, 
perhaps, but you don't have to try to sneak around the back side of the 
language to find the data you are looking for.  That's very much against 
the tao.  If you really want the names, nest dicts, but don't try to get 
the element name into the keys, because you already have that:

 >>> atomicdata = { 'C': { 'aa': 1,
...                       'ma': 2},
...                'H': { 'aa': 4
...                       'ma': 5},
...                'U': { 'aa': 78
...                       'ma': 20} }

and to get from there to storing all your data for all however many 
steps, change the value of each entry in atomic data from a tuple (or 
dict) to a list of tuples (or dicts).


 >>> atomicdata = { 'C': [ (1,2), (4,6), (7,8), (20,19) ],
...                'H': [ (5,7), (2,986), (3,4) ] }
 >>> atomicdata['H'].append((5,9))
 >>> atomicdata
{ 'C': [ (1, 2), (4, 6), (7, 8), (20, 19) ], 'H': [ (5, 7), (2, 986), 
(3, 4), (5, 9) ] }

You can build up those lists with nested for loops. (one tells you which 
element you're working on, the other which iteration).

The indexes of your lists, of course, will not correspond to the DS 
values, but to the step number.  To get back to the DS number, of 
course, let the index number be i, and calculate DS = i * 0.00005

That should get you off and running now.  Happy pythoning!

Cheers,
Cliff


From http  Sat Nov  4 12:12:06 2006
From: http (Paul Rubin)
Date: 04 Nov 2006 09:12:06 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
Message-ID: <7xpsc33zmh.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> > PS: Besides: what are speed costs of LOCK INC <mem> ?
> 
> That very much depends on the implementation. In
> http://gcc.gnu.org/ml/java/2001-03/msg00132.html
> Hans Boehm claims it's 15 cycles. 

I think that has to be on a single processor, or at most a dual core
processor with shared cache on die.  With multiple cpu chips I don't
think can get the signals around that fast.


From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 21:09:32 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 05 Nov 2006 13:09:32 +1100
Subject: program written to model population evolving over time
References: <1162674550.159300.76590@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.05.02.09.31.872794@REMOVE.THIS.cybersource.com.au>

On Sat, 04 Nov 2006 13:09:10 -0800, sam wrote:

> i've just finished a program which sets up an initial population
> consisting of four different phenotypes, allows them to evolve over
> time and graphs the output at the end, displaying what is in effect the
> evolutionary steady state for the system.
[snip]
> excuse my ignorance, but is there a site where people post this kind of
> stuff? i figured someone might be interested in playing with it,
> tweaking it a bit, changing the parameters. i've only been programming a
> couple of months, so i'm sure more experienced programmers could whack
> into shape if they were interested. or not...

Something like this would probably go very well on Useless Python, or the
Cheeseshop:

http://www.uselesspython.com/
http://cheeseshop.python.org/pypi



-- 
Steven.



From thomas.weholt at gmail.com  Mon Nov  6 17:54:38 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 6 Nov 2006 14:54:38 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162846153.137536.116970@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
Message-ID: <1162853677.881233.76940@m7g2000cwm.googlegroups.com>

Ok, I've cleaned up my code abit and it seems as if I've
encoded/decoded myself into a corner ;-). My understanding of unicode
has room for improvement, that's for sure. I got some pointers and
initial code-cleanup seem to have removed some of the strange results I
got, which several of you also pointed out.

Anyway, thanks for all your replies. I think I can get this thing up
and running with a bit more code tinkering. And I'll read up on some
unicode-docs as well. :-) Thanks again.

Thomas



John Machin wrote:
> Thomas W wrote:
> > I'm getting really annoyed with python in regards to
> > unicode/ascii-encoding problems.
> >
> > The string below is the encoding of the norwegian word "f?dselsdag".
> >
> > >>> s = 'f\xc3\x83\xc2\xb8dselsdag'
>
> There is no such thing as "*the* encoding" of any given string.
>
> >
> > I stored the string as "f?dselsdag" but somewhere in my code it got
> > translated into the mess above and I cannot get the original string
> > back.
>
> Somewhere in your code??? Can't you track through your code to see
> where it is being changed? Failing that, can't you show us your code so
> that we can help you?
>
> I have guessed *what* you got, but *how* you got it boggles the mind:
>
> The effect is the same as (decode from latin1 to Unicode, encode as
> utf8) *TWICE*. That's how you change one byte in the original to *FOUR*
> bytes in the "mess":
>
> | >>> orig = 'f\xf8dselsdag'
> | >>> orig.decode('latin1').encode('utf8')
> | 'f\xc3\xb8dselsdag'
> | >>>
> orig.decode('latin1').encode('utf8').decode('latin1').encode('utf8')
> | 'f\xc3\x83\xc2\xb8dselsdag'
> | >>>
>
> > It cannot be printed in the console or written a plain text-file.
>
> Incorrect. *Any* string can be printed on the console or written to a
> file. What you mean is that when you look at the output, it is not what
> you want.
>
> > I've tried to convert it using
> >
> > >>> s.encode('iso-8859-1')
> > Traceback (most recent call last):
> >   File "<interactive input>", line 1, in ?
> > UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> > ordinal not in range(128)
>
> encode is an attribute of unicode objects. If applied to a str object,
> the str object is converted to unicode first using the default codec
> (typically ascii).
>
> s.encode('iso-8859-1') is effectively
> s.decode('ascii').encode('iso-8859-1'), and s.decode('ascii') fails for
> the (obvious(?)) reason given.
>
> >
> > >>> s.encode('utf-8')
> > Traceback (most recent call last):
> >   File "<interactive input>", line 1, in ?
> > UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> > ordinal not in range(128)
>
> Same story as for 'iso-8859-1'
>
> >
> > And nothing helps. I cannot remember hacing these problems in earlier
> > versions of python
>
> I would be very surprised if you couldn't reproduce your problem on any
> 2.n version of Python.
>
> > and it's really annoying, even if it's my own fault
> > somehow, handling of normal characters like this shouldn't cause this
> > much hassle. Searching google for "codec can't decode byte" and
> > UnicodeDecodeError etc. produces a bunch of hits so it's obvious I'm
> > not alone.
> >
> > Any hints?
>
> 1. Read the Unicode howto: http://www.amk.ca/python/howto/unicode
> 2. Read the Python documentation on .decode() and .encode() carefully.
> 3. Show us your code so that we can help you avoid the double
> conversion to utf8. Tell us what IDE you are using.
> 4. Tell us what you are trying to achieve. Note that if all you are
> trying to do is read and write text in Norwegian (or any other language
> that's representable in iso-8859-1 aka latin1), then you don't have to
> do anything special at all in your code-- this is the good old "legacy"
> way of doing things universally in vogue before Unicode was invented!
> 
> HTH,
> John



From inq1ltd at verizon.net  Sun Nov  5 17:05:10 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 05 Nov 2006 17:05:10 -0500
Subject: Awesome Python Information
In-Reply-To: <DSs3h.5716$lx6.4779@tornado.texas.rr.com>
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
	<DSs3h.5716$lx6.4779@tornado.texas.rr.com>
Message-ID: <200611051705.10948.inq1ltd@verizon.net>


Thanks for the heads up. I spend enough time with 
the  email without having to chase gosts.

jim-on-linux
http://www.inqvista.com 






On Sunday 05 November 2006 16:39, Paul McGuire 
wrote:
> "Brandon" <Lion623 at mail.com> wrote in message
> news:1162753631.297470.315570 at m7g2000cwm.google
>groups.com...
>
> > Check out: www.ChezBrandon.com
>
> By which he means, "do NOT waste your time
> checking out this ridiculous website with
> absolutely no Python whatever anywhere." (This
> is the idiot who claims he saved the Congress
> from some Mossad poison gas attack, or
> whatever.)
>
> -- Paul


From fredrik at pythonware.com  Wed Nov 29 15:34:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 21:34:07 +0100
Subject: type(foo) == function ?
In-Reply-To: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
References: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
Message-ID: <ekkqrv$4g9$2@sea.gmane.org>

Tom Plunket wrote:

> I'd like to figure out if a given parameter is a function or not.

http://effbot.org/pyref/callable

</F>



From enleverlesX.XmcX at XmclaveauX.com  Fri Nov 17 16:38:49 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Fri, 17 Nov 2006 22:38:49 +0100
Subject: Pb subprocess 
Message-ID: <455e2c24$0$5090$ba4acef3@news.orange.fr>

Hi!


This code :
    p=subprocess.Popen(chaine, shell=True, stdout=subprocess.PIPE, 
stdin=subprocess.PIPE,  stderr=subprocess.PIPE)
    data=p.stdout.read()

Run OK, except when stdout.read() give unicode data, with char>255 (this 
give many "?")

How read real unicode data in stdout.read() ?


Thanks for all anwers


Michel Claveau







From jan.dries at dcube-resource.be  Sat Nov 11 06:19:51 2006
From: jan.dries at dcube-resource.be (Jan Dries)
Date: Sat, 11 Nov 2006 12:19:51 +0100
Subject: MySQLdb windows binaries for Python 2.5??
In-Reply-To: <1163238145.257490.144410@b28g2000cwb.googlegroups.com>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
Message-ID: <4555B1D7.90202@dcube-resource.be>

Henk.van.Asselt at gmail.com wrote:
> I'm also looking for a MySQLdb binary for windows. This is holding me
> from upgrading from Python 2.4 to Python 2.5 !
> 

If you search the Help Forum of the MySQLdb project on SourceForge, you 
will find a couple of people who have successfully built MySQLdb on 
Windows for 2.5, and are willing to share their installers.
That's how I got my binaries.

Regards,
Jan




From fredrik at dolda2000.com  Thu Nov 30 19:12:40 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Fri, 01 Dec 2006 01:12:40 +0100
Subject: String formatters with variable argument length
Message-ID: <1164931961.19678.23.camel@pc7.dolda2000.com>

I've been trying to get the string formatting operator (%) to work with
more arguments than the format string requires, but I can find no way to
do that. For example:

>>> "%i" % 10
'10'
>>> "i" % 10
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: not all arguments converted during string formatting

The thing is, I want to get format strings from the user, and I don't
want to require the user to consume all the arguments. docs.python.org
doesn't seem to have any clues on how to achieve this, and I can't think
of what to google for.

Could it be as I fear, that it is impossible?

Fredrik Tolf




From nkanthikiran at gmail.com  Wed Nov 22 04:13:51 2006
From: nkanthikiran at gmail.com (k.i.n.g.)
Date: 22 Nov 2006 01:13:51 -0800
Subject: file backup in windows
Message-ID: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>

Hi ALL,

I am a newbee programmer and started of with python recently. I am
trying write a script which backups outlook (.pst ) files everytime I
shutdown my system. I have writtern following code after some findings
on net. My .pst file path is as follows

" c:\documents and settings\060577\Local Settings\Application
Data\Microsoft\Outlook "
where 060577 represents username. I want my script to identigy the user
logged in and go to the resp outlook folder or should be able to read
outlook store directory path from registry and the copy the files to
the desired path.

---------------------------------------------------
how can i make the following code work, I have probelm with filepath
declaration.
---------------------------------------------------
import os, shutil
filepath = ' C:\\Documents and Settings\\060577\\Local
Settings\\Application Data\\Microsoft\\Outlook\\* '
backup = ' D:\\temp\\outlook '
os.system ("xcopy /s %s %s" % (filepath, backup))
-----------------------------------------


Thank you,
Kk



From zobeid at techie.com  Fri Nov 24 19:11:21 2006
From: zobeid at techie.com (Tony Belding)
Date: Fri, 24 Nov 2006 18:11:21 -0600
Subject: Ruby/Python/REXX as a MUCK scripting language
Message-ID: <2006112418112116807-zobeid@techiecom>

I'm interested in using an off-the-shelf interpreted language as a 
user-accessible scripting language for a MUCK.  I'm just not sure if I 
can find one that does everything I need.  The MUCK must be able to 
call the interpreter and execute scripts with it, but the interpreter 
must also be able to call functions in the MUCK code.  And then there's 
the security issue that really worries me. . .  I have to be able to 
limit what the interpreter can execute.  I can't have my users running 
scripts that access the console, access the filesystem or sockets 
directly, or call libraries or other binaries outside the MUCK.

Is this practical?  I'm thinking of Ruby or Python for this, if they 
can meet the requirements.

I might even consider REXX. . .  I remember ARexx from my Amiga days, 
and how great it was for string manipulation and application scripting. 
 However. . .  My immediate target platform, Mac OS X, comes with Ruby 
and Python but not REXX, so that's a disadvantage.

My final option would be to create my own language interpeter where I 
have control over everything that happens.  That is what MUCKs have 
always done in the past.  But the result was always quirky, limited 
languages like MUF (Multi-User Forth) which really turn off a lot of 
coders.  Furthermore, I've never created a language before, and it 
would be a lot of extra work for me.

-- 
Tony Belding, Hamilton Texas



From mnations at gmail.com  Mon Nov 13 20:24:24 2006
From: mnations at gmail.com (Mudcat)
Date: 13 Nov 2006 17:24:24 -0800
Subject: Tkinter: Strange behavior using place() and changing cursors
Message-ID: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>

I was trying to design a widget that I could drag and drop anywhere in
a frame and then resize by pulling at the edges with the mouse. I have
fiddled with several different approaches and came across this behavior
when using the combination of place() and configure(cursor = ...) This
problem doesn't occur if you remove either one of these elements.

It's a very basic design of a button wrapped in a sizer frame and is
supposed to work like any window that can be resized. The mouse will
change into a resize cursor when it hits the sizer frame (button's
edge).

However when the cursor hits the right edge it gets in some kind of
loop where it keeps entering and leaving the frame. You can also cause
this to happen by entering the widget from the bottom and slowly moving
down. However it doesn't happen if you enter from the left or the top.

Here's the code, boiled down to the basic components that seem to
affect it in some way. Is there something I'm supposed to do in order
to prevent this from happening?

Thanks,
Marc

from Tkinter import *

class Gui:
	def __init__(self, master):
		master.geometry("200x100")
		btn = Widget(master)

class Widget:
	def __init__(self, master):
		self.master = master
		self.buildFrame()
		self.buildWidget()

	def buildFrame(self):
		self.f = Frame(self.master, height=32, width=32, relief=RIDGE,
borderwidth=2)
		self.f.place(relx=.5,rely=.5)
		self.f.bind( '<Enter>', self.enterFrame )
		self.f.bind( '<Leave>', self.leaveFrame )

	def buildWidget(self):
    		self.b = Button(self.f, text="Sure!")
    		self.b.pack(fill=BOTH, expand=1)

	def enterFrame(self, event):
		self.f.configure(cursor = 'sb_h_double_arrow')

	def leaveFrame(self, event):
		self.f.configure(cursor = '' )
		
root = Tk()
ent = Gui(root)
root.mainloop()



From bignose+hates-spam at benfinney.id.au  Thu Nov  2 01:02:42 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Nov 2006 17:02:42 +1100
Subject: Python tools for managing static websites?
References: <mailman.1542.1162296580.11739.python-list@python.org>
	<1162331694.836988.322220@m73g2000cwd.googlegroups.com>
	<d6e943400611012155gedf9d3m53557400d2d4b6e6@mail.gmail.com>
Message-ID: <877iye4c8t.fsf@benfinney.id.au>

"Chris Pearl" <chrispearl at gmail.com> writes:

> Thanks to everyone who have contributed to this thread. Several of the
> posted suggestions definitely warrant a closer look. I'm going to
> review those and publish my final choice - including the reasons for
> it - if anyone's interested.

Yes please.

-- 
 \      "The opposite of a correct statement is a false statement. But |
  `\     the opposite of a profound truth may well be another profound |
_o__)                                           truth."  -- Niels Bohr |
Ben Finney



From dlenski at gmail.com  Fri Nov 17 07:17:45 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 17 Nov 2006 04:17:45 -0800
Subject: What python modules are available?
In-Reply-To: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
Message-ID: <1163765865.914147.38000@k70g2000cwa.googlegroups.com>

Why Tea wrote:
> How do I find out what python modules are installed on a Solaris
> platform?
>
> I tried to import numarray, but python couldn't find it.
>
> /Why Tea

They're usually stored in something like /usr/lib/python2.4
And you can find most of the available modules at
http://python.org/pypi

Dan



From fredrik at pythonware.com  Thu Nov 16 05:58:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:58:37 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejhfnt$lna$4@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>	<ejhcdm$3pv$1@wake.carmen.se>	<ejhdnt$hq6$1@sea.gmane.org>	<ejheig$jai$1@sea.gmane.org>	<ejhep2$kva$1@sea.gmane.org>
	<ejhfnt$lna$4@sea.gmane.org>
Message-ID: <ejhg8s$pti$1@sea.gmane.org>

Steve Holden wrote:

y is this thread still going?
>> http://www.bikeshed.org/
>>
> I deliberately avoided using that analogy, but I'm sorry to say it 
> *does* apply. I'd hate to see c.l.py descend to becoming a wibble group.

I switched to a reader that lets me kill threads with a single keypress 
a long time ago.  which makes me wonder why I saw Magnus post and your 
followup.  wait a second...



From grindel1 at yahoo.com  Wed Nov 29 06:05:27 2006
From: grindel1 at yahoo.com (grindel)
Date: Wed, 29 Nov 2006 11:05:27 GMT
Subject: proof of concept python and tkinter gnugo interface
In-Reply-To: <ek5a9j$tcm$1@news3.zwoll1.ov.home.nl>
References: <ek5a9j$tcm$1@news3.zwoll1.ov.home.nl>
Message-ID: <XPdbh.29212$lD6.28290@tornado.tampabay.rr.com>

Anton Vredegoor wrote:
> For the last few days I've been doodling with a script that provides a 
> graphical interface to gnugo by using its GTP protocol. At the moment 
> the script is *very* basic, in fact the only thing it does is to allow 
> one to click on a coordinate and place a move there OR press the space 
> bar in order to let gnugo generate a move.
> 
> However, I feel that this idea has some potential, it could be made to 
> undo or redo moves or load sgf-games. But most importantly: It could 
> load the list of move suggestions from gnugo, do some computations 
> itself in *Python* on that list and then generate a move.
> 
> So I thought that it would be best to present this script while it is 
> still small and modifications can be done easily. In the end there's 
> possibly a lot of potential and I think I'm going to need some help from 
> people that are enthousiastic about Python or gnugo.
> 
> What I want to accomplish with this post is to get to know whether it 
> would be a good idea to make it  a sourceforge project (it would be even 
> better if some more experienced sourceforger would do it for me :-) or 
> whether I should just go on doodling on this script by myself, gradually 
> adapting it to fit my personal interests and come back to you in a few 
> years with a more complete script.
> 
> Is there any need for such a beast for *more* people than just me to 
> work on?
> 
> Here's the proof of concept, just copy it to some dir and run the Python 
> script:
> 
> http://home.hccnet.nl/a.vredegoor/gnugo/
> 
> It needs Python 2.5 which you can get at:
> 
> http://www.python.org/
> 
> Anton
If you talking about a simple gui for gnu go it's been done to death. 
see any misc. pandanet client and numerous other softwares such as 
durish or go knot. If your client is going to do something uniquely 
different from programs like this then you should focus in this aspect 
of the program and develop other features later. It's also important 
that it be able to read and write sgf files


From ivranos at freemail.no.spam.gr  Sun Nov 12 08:06:03 2006
From: ivranos at freemail.no.spam.gr (Ioannis Vranos)
Date: Sun, 12 Nov 2006 15:06:03 +0200
Subject: python(abi)
Message-ID: <1163336764.407597@athprx04>

OS: Scientific Linux 4.4 (http://www.scientificlinux.org) which is a Red Hat Enterprise 
Linux 4 derivative (http://www.redhat.com/rhel/), like CentOS (http://www.centos.org), 
White Box Linux (http://www.whiteboxlinux.org) etc.

Python version built and installed from sources: 2.4.4.


I am trying to install BitTorrent 5.0 prerequisites, and when I am trying to install 
wxPython-common-gtk2-unicode-2.6.3.3-fc4_py2.4.i386.rpm, I am getting the message that it 
requires python(abi):

[root at localhost download]# rpm -ivh wxPython-common-gtk2-unicode-2.6.3.3-fc4_py2.4.i386.rpm
error: Failed dependencies:
         python(abi) = 2.4 is needed by wxPython-common-gtk2-unicode-2.6.3.3-fc4_py2.4.i386

[root at localhost download]#



I have found in some message logs, that it is a pseudo-requirement, but where can I 
download this for Python 2.4.4? (The Python version that comes with my distribution is 
currently 2.3.4).


From mike$#at^&nospam!%trauschus  Wed Nov  1 10:23:15 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Wed, 01 Nov 2006 10:23:15 -0500
Subject: PyDev + Eclipse (Was: Re: What's the best IDE?)
In-Reply-To: <mailman.1353.1161957108.11739.python-list@python.org>
References: <mailman.1353.1161957108.11739.python-list@python.org>
Message-ID: <beOdncmT7_Z-JtXYnZ2dnUVZ_rydnZ2d@comcast.com>

?ric Daigneault wrote:
> 
> I run the latest pydev on both windows and linux...  The setup is
> excatcly the same (on the eclipse, path setup and all) 
> My windows setup is much better at auto-complete that the linux
> setup...  In linux, other than with self, I seldom get auto complete on
> other classes.  In windows it sometimes can figure out to what class
> belong the instance and propose appropriate choices...
> 
> Caus of my present workload I gave up trying to make it work... 
> E :D.
> 

Yeah, I have given up, too.  I don't really need it, though it would
have been nice to have because I do not (yet) have a second monitor to
attach to my workstation for information-browsing... :-P

	-- Mike


From mikael at isy.liu.se  Wed Nov 22 07:10:40 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 22 Nov 2006 13:10:40 +0100
Subject: file backup in windows
In-Reply-To: <1164196688.000016.25350@e3g2000cwe.googlegroups.com>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>	<mailman.581.1164189748.32031.python-list@python.org>
	<1164196688.000016.25350@e3g2000cwe.googlegroups.com>
Message-ID: <45643E40.3050009@isy.liu.se>

k.i.n.g. wrote:
> [snip code]
> The above code was fine while printing, when I am trying to use this
> (outlook_path) to use as source path it is giving file permission error
> can you please clarify this

Did you follow the link that Fredrik Lundh gave you?

/MiO


From nkanthikiran at gmail.com  Wed Nov 22 07:23:47 2006
From: nkanthikiran at gmail.com (k.i.n.g.)
Date: 22 Nov 2006 04:23:47 -0800
Subject: file backup in windows
In-Reply-To: <mailman.584.1164197445.32031.python-list@python.org>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
	<mailman.581.1164189748.32031.python-list@python.org>
	<1164196688.000016.25350@e3g2000cwe.googlegroups.com>
	<mailman.584.1164197445.32031.python-list@python.org>
Message-ID: <1164198227.681869.132540@j44g2000cwa.googlegroups.com>

Hi ,

I am sorry I am providing the code i used as it is. Being newbee to
programming I have tinkerd with various options i found on the net.
--------------------------------------------------------------------------------
start of the code
------------------------------------------------------------------------------------
import os, sys ,shutil, win32file
import time
from win32com.shell import shell, shellcon

local_app_data = shell.SHGetSpecialFolderPath
(0,shellcon.CSIDL_LOCAL_APPDATA)
outlook_path = os.path.join (local_app_data, "Microsoft", "Outlook")

# print outlook_path
#c:\documents and settings\060577\Local Settings\Application
Data\Microsoft\Outlook

source = outlook_path
#source = outlook_path +'\\*'
print source

backup = 'D:\MailBackup'
backup1=r'D:\temp\outlook1'
backup2 =  'D:\MailBackup'
today = backup1 + '_'  + time.strftime ( '%Y-%m-%d')
now = time.strftime('%H.%M.%S')
target = today +'_'+ now
if not os.path.exists(target):
	os.mkdir(target) # make directory
	print 'Successfully created directory', target

#shutil.copy(source, backup)
#os.system( "copy  "(source,backup))
#os.system ("xcopy %s %s" % (source, backup1))
#os.system ("xcopy /s %s %s" % (outlook_path, backup1))
#os.system ("xcopy /s %s %s" % (backup2, backup1))
#os.system( 'xcopy /i D:\\MailBackup\\* d:\\temp\\outlook')
#win32file.CopyFile (outlook_path, backup, 0)
#os.system ("xcopy /s %s %s" % (backup,target))

os.system ("xcopy /s %s %s" % (source,target)) # this doesnt give me
any errors but the #work is not done

win32file.CopyFile (source, target, 1)
-----------------------------------------------------------------------
end
------------------------------------------------------------------


---------
output
----------
C:\Documents and Settings\060577\Local Settings\Application
Data\Microsoft\Outlook\*
Successfully created directory D:\temp\outlook1_2006-11-22_17.41.54

Traceback (most recent call last):
  File "C:\Documents and
Settings\060577\kk\source_code\py\Mypy\pywin32test.py", line 34, in
<module>
    win32file.CopyFile (source, target, 1)
error: (123, 'CopyFile', 'The filename, directory name, or volume label
syntax is incorrect.')



From mpeters42 at gmail.com  Mon Nov  6 15:24:13 2006
From: mpeters42 at gmail.com (Mark Peters)
Date: 6 Nov 2006 12:24:13 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
Message-ID: <1162844653.567333.285640@e3g2000cwe.googlegroups.com>

> The string below is the encoding of the norwegian word "f?dselsdag".
>
> >>> s = 'f\xc3\x83\xc2\xb8dselsdag'

I'm not sure which encoding method you used to get the string above.
Here's the result of my playing with the string in IDLE:

>>> u1 = u'f?dselsdag'
>>> u1
u'f\xf8dselsdag'
>>> s1 = u1.encode('utf-8')
>>> s1
'f\xc3\xb8dselsdag'
>>> u2 = s1.decode('utf-8')
>>> u2
u'f\xf8dselsdag'
>>> print u2
f?dselsdag
>>>



From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 29 19:59:58 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 30 Nov 2006 11:59:58 +1100
Subject: Remarkable results with psyco and sieve of Eratosthenes
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e08ba$0$1505$db0fefd9@news.zen.co.uk>
	<1164843339.129776.110420@j72g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.30.00.59.57.143125@REMOVE.THIS.cybersource.com.au>

On Wed, 29 Nov 2006 15:35:39 -0800, Steve Bergman wrote:

> BTW, strictly speaking, shouldn't I be adding something to the floating
> point sqrt result, before converting to int, to allow for rounding
> error?  

If you don't mind doing no more than one unnecessary test per candidate,
you can just add one to maxfact to allow for that. Or use round()
rather than int(). Or don't convert it at all, just say:

maxfact = math.sqrt(x)

and compare directly to that.


> If it is supposed to be 367 but comes in at 366.99999999, don't
> I potentially classify a composite as a prime?

Do you fear the math.sqrt() function is buggy? If so, all bets are off :-)


> How much needs to be added?

No more than 1, and even that might lead you to sometimes performing an
unnecessary test.



-- 
Steven.



From d.schulz81 at gmx.net  Mon Nov 13 12:04:46 2006
From: d.schulz81 at gmx.net (dischdennis)
Date: 13 Nov 2006 09:04:46 -0800
Subject: Singleton Class Exception
Message-ID: <1163437486.036537.270190@h54g2000cwb.googlegroups.com>

Hello List,

I would like to make a singleton class in python 2.4.3, I found this
pattern in the web:

class Singleton:
    __single = None
    def __init__( self ):
        if Singleton.__single:
            raise Singleton.__single
        Singleton.__single = self


the line "raise Singleton.__single" invokes in my class the following
error:

exceptions must be classes, instances, or strings (deprecated), not
PurchaseRequisitionController



Greetings, Dennis



From bearophileHUGS at lycos.com  Mon Nov  6 18:56:03 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Nov 2006 15:56:03 -0800
Subject: simple way to un-nest (flatten?) list
In-Reply-To: <4cP3h.48258$r61.7630@text.news.blueyonder.co.uk>
References: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>
	<pan.2006.11.06.10.43.12.77229@REMOVE.THIS.cybersource.com.au>
	<4cP3h.48258$r61.7630@text.news.blueyonder.co.uk>
Message-ID: <1162857363.748796.120430@i42g2000cwa.googlegroups.com>

djc:
> As it is possible that the tuples will not always be the same word in
> variant cases
> result = sum(r.values(), ())
>   will do fine and is as simple as I suspected the answer would be.

It is simple, but I suggest you to take a look at the speed of that
part of your code into your program. With this you can see the
difference:

from time import clock
d = dict((i,range(300)) for i in xrange(300))

t = clock()
r1 = sum(d.values(), [])
print clock() - t

t = clock()
r2 = []
for v in d.values(): r2.extend(v)
print clock() - t

assert r1 == r2

Bye,
bearophile



From apardon at forel.vub.ac.be  Sat Nov 11 05:43:50 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 11 Nov 2006 10:43:50 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2gp9$1qc$1@sea.gmane.org>
	<mailman.2055.1163186198.11739.python-list@python.org>
	<pan.2006.11.11.02.06.05.727087@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnelbab6.dc5.apardon@rcpc42.vub.ac.be>

On 2006-11-11, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Fri, 10 Nov 2006 13:16:32 -0600, Michael Hobbs wrote:
>
>> Yeah, okay, I didn't read through the details of the PEP. I picked a bad 
>> example to illustrate a point that is still true. The FAQ also tries to 
>> argue that it's a Good Thing that join() is a string method, not a list 
>> method. It also tries to argue that there's a good reason that lists are 
>> different than tuples. I don't think it would surprising that many 
>> Python developers don't really buy those arguments either.
>
> Well, as far as I'm concerned, you've just blown your credibility
> completely out the water now. 
>
> Yes, I'm aware that there are many Python programmers who don't get join()
> or lists/tuples, but I'm constantly surprised by that fact. At the risk of
> starting another argument, to my mind that's like discovering that there
> are professional butchers who don't think that using a sharp knife is a
> good idea.

Well I would think that if you would find out that many professional
butchers would think so, you might consider the idea has some merrit.

-- 
Antoon Pardon


From fredrik at pythonware.com  Fri Nov 17 02:40:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 08:40:15 +0100
Subject: popen(1-4) as a seperate process
In-Reply-To: <455D5EFE.40803@al.com.au>
References: <455D3F18.40902@al.com.au> <ejjmm8$q90$1@sea.gmane.org>
	<455D5EFE.40803@al.com.au>
Message-ID: <ejjp0u$vel$1@sea.gmane.org>

Astan Chee wrote:

> Yes, that is true. But everytime I run a os.popen() it executes as a 
> child process of the current running one. How do I launch as a seperate 
> process?

what's your definition of "separate process", and how is that different 
from a child process?  (all processes created by a process start out as 
child processes).

> Note that I dont care about whatever happens to the seperate process 
> itself.

so why are you using os.popen() if you're not interested in talking to 
it?  maybe os.system("command&") would be more appropriate ?

</F>



From geskerrett at hotmail.com  Tue Nov  7 22:42:16 2006
From: geskerrett at hotmail.com (geskerrett at hotmail.com)
Date: 7 Nov 2006 19:42:16 -0800
Subject: struggling with memory release using ctypes wrapper
Message-ID: <1162957336.662745.243560@m7g2000cwm.googlegroups.com>

I was wondering if a ctypes expert could point me in the right
direction.

I am using the wrapper for the "freeimage" library to create multipage
TIFF files from a group of png images.  The images load and save fine,
the problem seems to be that the memory used during the bitmap creation
isn't being released properly until the python program ends and python
exits.

The multipage tiff's are created in a loop (ie, creating 3 tiffs from a
group of 14 png files).  As the loop progresses, the files are built,
but the amount of memory that is used and reported by Windows XP
taskmanager is not released until python program exits at which time
the amount of memory reported is exactly the same as the start of the
processing.

I am using WinXP SP2, Python 2.4.4, ctypes 1.0.1 and the latest
freeimage libarary and wrapper.

My questions is this,
I have scoured the freeimage site and am confident that I am making the
correct calls to the library and in the correct sequence to release the
resources allocated by the freeimage dll.  After each call to unload
the resources, I have checked the return values, and every thing
*seems* ok in this regard.

I have even used the gc module in DEBUG mode and nothing is reported as
uncollectible.

My questions:
Is there some other method to evaluate a running python program to see
what memory is consumed and objects which have this memory allocated??



From mealier_brice at NO_SPAM_yahoo.fr  Sun Nov  5 17:21:45 2006
From: mealier_brice at NO_SPAM_yahoo.fr (Brice)
Date: Sun, 5 Nov 2006 23:21:45 +0100
Subject: Wait for a system command executed in the background
References: <454e2037$0$97241$892e7fe2@authen.yellow.readfreenews.net>
	<U6s3h.3310$ig4.2073@newsread2.news.pas.earthlink.net>
Message-ID: <454e63fc$0$97251$892e7fe2@authen.yellow.readfreenews.net>

On 2006-11-05, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Sun, 5 Nov 2006 18:32:39 +0100, Brice
><mealier_brice at NO_SPAM_yahoo.fr> declaimed the following in
> comp.lang.python:
>
>
>> 
>> At the time, I have a working solution (not fully developped by
>> myself...), but in this solution os.system is used to start the
>> different shell commands and the commands do not have a & at the end.
>> Therefore during the whole execution of the plugin, quodlibet is not
>> responsive.
>>
> 	Might it not be easier to just write each of those commands to a
> temporary file, then at the end submit that file as a shell script that
> runs in the background? {Maybe the last command should be one the
> deletes the file itself?}
>  

At the time being I don't see other possible solution. Let's see if
someone else's got an idea.

Thx

-- 
Brice
Arch Linux (Linux user nb. 372699)
-----
"Unix IS user friendly, it is just selective about who his friends are"


From tjreedy at udel.edu  Thu Nov  9 14:22:13 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 9 Nov 2006 14:22:13 -0500
Subject: UnboundLocalError
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
Message-ID: <eivv53$rii$1@sea.gmane.org>


"Camellia" <breakfastea at gmail.com> wrote in message 
news:1163083074.786927.184170 at i42g2000cwa.googlegroups.com...
> hi all
>
> why it generates an "UnboundLocalError" when I do the following:
>
> <code>
> ...

Presumably, the elided code includes a 'def number():' statement

> def main():
>    number = number()

Within a function, a given name can be either global or local, but not 
both.
Here you are expecting the compiler to interpret the first occurance of 
'number' as local and the second as global.  Humans can often resolve such 
ambiguities correctly, but not necessarily always.  So this is too much to 
ask of a program and hence it is not allowed.

As Benjamin said, use two different names for the two different objects 
that you need to use in the same context.

Terry Jan Reedy






From assaflavie at gmail.com  Wed Nov  1 08:45:04 2006
From: assaflavie at gmail.com (Assaf Lavie)
Date: 1 Nov 2006 05:45:04 -0800
Subject: authenticated https post
In-Reply-To: <1162387700.222826.249960@f16g2000cwb.googlegroups.com>
References: <1162385421.870142.8680@h48g2000cwc.googlegroups.com>
	<mailman.1592.1162386154.11739.python-list@python.org>
	<1162387700.222826.249960@f16g2000cwb.googlegroups.com>
Message-ID: <1162388703.897486.13450@b28g2000cwb.googlegroups.com>



On Nov 1, 3:28 pm, "Assaf Lavie" <assafla... at gmail.com> wrote:
> I think that library is obsolete. It uses http, instead of https.
>
> On Nov 1, 3:00 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
>
> > assaf wrote:
> > > I'm trying to use Python to work with del.icio.us's API.
> > > Basically, I need to be able to do a simple https post, with
> > > username/password authentication.
> > > (For those interested, the del.icio.us API is here:
> > >http://del.icio.us/help/api/)
>
> > > I can't for the life of me find a simple https example code that
> > > works... I'm working on Windows, btw, if that makes any difference.tried  http://code.google.com/p/pydelicious/?
>
> > (it's linked from the "useful things that other people have made"
> > section on del.icio.us' help page, just above the "developers" section
> > where you found that api link).
>
> > </F>

You know what, it _is_ obsolete, but modifying it was a breeze. Thanks
for the tip.

For those interested, here's the gist of it:

# The following downloads and prints a XML file of all the bookmarks of
a given user:

import urllib2

authinfo = urllib2.HTTPBasicAuthHandler()
authinfo.add_password('del.icio.us API',
	'https://api.del.icio.us',
	'<username>',
	'<pwd>')

urllib2.install_opener(urllib2.build_opener(authinfo))

print urllib2.urlopen('https://api.del.icio.us/v1/posts/all?').read()



From gagsl-py at yahoo.com.ar  Wed Nov 29 05:04:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 07:04:36 -0300
Subject: Python program that validates an url against w3c markup validator
In-Reply-To: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061129070326.053df160@yahoo.com.ar>

At Wednesday 29/11/2006 02:29, yaru22 wrote:

>I'd like to create a program that validates bunch of urls against the
>w3c markup validator (http://validator.w3.org/) and store the result in
>a file.
>
>Since I don't know network programming, I have no idea how to start
>coding this program.

Why not use the standalone validator? You can download and install it.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From paddy3118 at netscape.net  Tue Nov 14 11:34:35 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Nov 2006 08:34:35 -0800
Subject: refactoring so that multiple changes can be made with one
	variable?
In-Reply-To: <4559e396$0$32430$c3e8da3@news.astraweb.com>
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <1163522075.704650.40850@i42g2000cwa.googlegroups.com>


John Salerno wrote:

> My code is below. For now I'm focusing on the lines where health (and
> armor) are increased in each character class. Let's say I decided to
> change the amount of increase in the future. As it is now, I'd have to
> go to each character class and change the number so that each is still
> in a good relation to the other (right now: 3, 2, 1; later: perhaps 4,
> 3, 2, 1, if I added a new class -- i.e., change Fighter from 3 to 4,
> Thief from 2 to 3, in other words increase them all by 1). So instead of
> changing each one, is there a simple, clean way of just changing a
> single number so that this change is reflected in all classes? Hope that
> makes sense.
>
>
You could keep a handle on all object instances created then go through
the objects making appropriate changes, e.g:


class Character(object):
     instances = []
     def __init__(self, name, strength, dexterity, intelligence):
          instances.append(self)
          # as before ...
     def mod_instances(self):
          for inst in instances:
               inst.some_property += 1     # or whatever
# (Untested)

- Paddy.



From inq1ltd at verizon.net  Thu Nov 30 21:07:30 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 30 Nov 2006 21:07:30 -0500
Subject: shtoom making PC2Phone calls
In-Reply-To: <1164908118.401178.201670@80g2000cwy.googlegroups.com>
References: <1164908118.401178.201670@80g2000cwy.googlegroups.com>
Message-ID: <200611302107.30586.inq1ltd@verizon.net>


On Thursday 30 November 2006 12:35, Croteam wrote:
> Hello,
>
> Can somebody give me shtoom examples or source
> code for making PC2Phone calls and pc to pc
> calls. (if you give me source code,please give
> me full url to that source or send me to email:
>    vedran at v-programs.com)
>
>                            Thanks,I will really
> appreciate that

Try,
http://pyserial.sourceforge.net/

Many examples. I've used some of the examples to 
connect pc to pc. And with phone attached, you 
can to talk with someone on the other end.

Search using serial port. 


jim-on-linux
http://www.inqvista.com  




From sturlamolden at yahoo.no  Sun Nov 12 11:39:53 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Nov 2006 08:39:53 -0800
Subject: Python component model
In-Reply-To: <mailman.130.1160418618.11739.python-list@python.org>
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<mailman.130.1160418618.11739.python-list@python.org>
Message-ID: <1163349593.903843.167510@b28g2000cwb.googlegroups.com>


skip at pobox.com wrote:

> Having never used java or .NET I'm not sure what you're looking for.

There is a whole generation of computer users out there scared stiff of
using the keyboard. Soon, computers will not have a keyboard at all.
The trend is perhaps more pronounced among managers not writing code
themselves, but "taking decisions" about which tools to use.

The answer to these needs are so-called "RAD tools" like Borland
Delphi, Visual Basic, Visual C# .NET, and perhaps Java's NetBeans.
Instead of writing code, a "programmer" selects "components" from a
menu, drags the component over a "form" and then drops it onto the
"form". A form can e.g. be a web page, a GUI window or just an
invisible abstract container in case the program doesn't have a visual
interface. Components can be visual GUI widgets like buttons and
sliders, but also "invisible" objects like files and sockets. Instead
of creating a file by typing "open" one would "drag 'n drop" a "file
component" from a menu onto the form, and then type in the name in some
sort of "property menu" for the component. If one needs a tcp socket,
one don't type "s = socket(...)" in the code but select an socket from
a menu and drop it over a form.

In order to do this, a RAD tool need some sort of standardised
component model. Sure, it must be able to inspect the component, but
also interpret the methods and members that it finds. The RAD tool must
be able to inspect the model to find out what to "publish" in the
property menu, what event it generates, etc. Typical component
standards used for this is ActiveX (in Visual Basic), .NET in Visual
C#, VCL in Delphi, and JavaBeans in NetBeans. If you build a component
that does not follow the standard, the RAD tool can't use it. For
example in JavaBeans, every pair of method that looks like
"component.setSomething(...)" and "component.getSomething(...)" is
parsed by the RAD tool as the property "Something" and put into the
property meny for the component. The programmer can change the value of
this property by typing into the property menu.

The most extreme RAD tool is LabView, where no code is written at all,
not even event handlers which are still hand coded in the other RAD
tools. In labView, everything is "dragged and dropped", and the dropped
components are connected by "cables" just like a circuit board. There
are even "components" encapsulating for and while loops. If you need a
while loop, you drop a while loop onto the form. If you need a
subroutine, you drop a subroutine onto the form, etc. Nothing is typed.

Does Python need a standard component model like ActiveX, VCL, .NET or
JavaBeans?

First, there are GUI designer's for Python. These include GLADE, QT
Designer and wxGlade. We don't need a Python object model to support
GUI designers. Second, are we really that scared of writing code? Some
obviously are. Why is dropping a socket component preferred over typing
"socket"? Those that want LabView or Visual Basic knows where to find
it.

Python already has "properties". What Python don't have is "events",
but that can be easily implemented (and is implemented in all GUI
toolkits) e.g. using exceptions and references to functions. En event
can be raised by raising an exception. Perhaps we should define an
standard "event" interface just to shut them up? Then we have a
"component model".



From p.lavarre at ieee.org  Thu Nov  9 18:41:23 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 15:41:23 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
Message-ID: <1163115683.054931.103870@k70g2000cwa.googlegroups.com>

> > > cdb0 = '\x08' '\x01\x23\x45' '\x80' '\0'
> >
> > cdb = ''
> > cdb += struct.pack('>B', 0x08)
> > cdb += struct.pack('>I', skip)[-3:]
> > cdb += struct.pack('>BB', count, 0)
>
> The change from [-3:] to [1:] is a minor cosmetic improvement,

Ouch, [1:] works while sizeof I is 4, yes, but that's not what I meant,
more generally.

Something else I tried that doesn't work is:

skip = 0x12345 ; count = 0x80
struct.pack('>8b3b21b8b8b', 0x08, 0, skip, count, 0)

That doesn't work, because in Python struct b means signed char, not
bit; and a struct repeat count adds fields, rather than making a field
wider.

But do you see what I mean?  The fields of this struct have 8, 3, 21,
8, and 8 bits.  The "skip" field has 21 bits, the "count" field has 8
bits, I'd like to vary both of those.

> why do you want to do that to concise working code???

cdb0 = '\x08' '\x01\x23\x45' '\x80' '\0'
works, but it's not parameterised.  Writing out the hex literal always
packs the same x12345 and x80 values into those 21 and 8 bit fields.

I see I can concisely print and eval the big-endian hex:

X08Read6 = 0x08
skip = 0x12345 ; count = 0x80
hex = '%02X' % X08Read6 + ('%06X' % skip) + ('%02X' % count) + '00'
''.join([chr(int(hex[ix:ix+2],0x10)) for ix in range(0,len(hex),2)])

But that's ugly too.  Maybe least ugly so far, if I bury the
join-chr-int-for-range-len-2 in a def.

Is there no less ugly way to say pack bits, rather than pack bytes, in
Python?



From Jeff.Demel at JavelinDirect.com  Tue Nov 14 10:37:24 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Tue, 14 Nov 2006 09:37:24 -0600
Subject: Noob | datetime question
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFB7@DMSP-MSG-EVS01.mail.pvt>

Perfect.  Thanks a million.

.strftime was the method I was looking for.

-Jeff
 

-----Original Message-----
From: python-list-bounces+jeff.demel=javelindirect.com at python.org
[mailto:python-list-bounces+jeff.demel=javelindirect.com at python.org] On
Behalf Of Kevin Kelley
Sent: Tuesday, November 14, 2006 9:34 AM
To: python-list at python.org
Subject: Re: Noob | datetime question

import time
FORMAT='%Y%m%d'

time.strftime(FORMAT,time.gmtime(time.time()+8380800))
output = '20070219'

--
Kevin Kelley


On 11/14/06, Demel, Jeff <Jeff.Demel at javelindirect.com> wrote:

	I'm having trouble finding exactly what I need by googling, so
thought
	I'd try to get a quick answer from the group.  This seems like
something
	that should be dead simple.
	
	I need to generate a string value of a date in the format
YYYYMMDD that 
	is 97 days in the future.  The datetime module is brand new to
me, and
	I'm not sure how to do this.  Can someone help me out here?
	
	TIA
	
	-Jeff
	This email is intended only for the individual or entity to
which it is addressed.  This email may contain information that is
privileged, confidential or otherwise protected from disclosure.
Dissemination, distribution or copying of this e-mail or any attachments
by anyone other than the intended recipient, or an employee or agent
responsible for delivering the message to the intended recipient, is
prohibited. If you are not the intended recipient of this message or the
employee or agent responsible for delivery of this email to the intended
recipient, please notify the sender by replying to this message and then
delete it from your system.  Any use, dissemination, distribution, or
reproduction of this message by unintended recipients is strictly
prohibited and may be unla! wful. 
	--
	http://mail.python.org/mailman/listinfo/python-list
	


This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From srikrishnamohan at gmail.com  Wed Nov 22 14:41:39 2006
From: srikrishnamohan at gmail.com (km)
Date: Thu, 23 Nov 2006 01:11:39 +0530
Subject: regex problem
Message-ID: <f4cc03640611221141j51f2bcb1wa06d7a05db42a46c@mail.gmail.com>

Hi all,

line is am trying to match is
1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra    29.9    0.00011   1

regex i have written is
re.compile
(r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)')

I am trying to extract 0.0011 value from the above line.
why doesnt it match the group(4) item of the match ?

any idea whats wrong  with it ?

regards,
KM
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From hao.yu at yeah.net  Fri Nov 10 08:22:06 2006
From: hao.yu at yeah.net (yuhao)
Date: Fri, 10 Nov 2006 21:22:06 +0800
Subject: Back Slash not allowed at the end of raw string?
Message-ID: <DreamMail__212206_42164885444@smtp.yeah.net>

I'm using Python 2.5 on Windows XP Pro.
While testing for strings, I got the following result:

>>> r'c:\'
SyntaxError: EOL while scanning single-quoted string

>>> r'c:\nwin'
'c:\\nwin'

>>> r"c:\"
SyntaxError: EOL while scanning single-quoted string

>>> r'\n'
'\\n'

>>> r'\"'
'\\"'

It seemed that when a back slash is inside the raw string, 
it is correctly recognized as a normal character, not translated; 
but when put to the end, it raise an error.

And the message looks so strange:

>>> r"c:\"
SyntaxError: EOL while scanning single-quoted string


what does this message mean? I'm not using any single quote in the statement.
It this a bug or by design?
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From Hakusa at gmail.com  Sun Nov  5 19:25:50 2006
From: Hakusa at gmail.com (Hakusa at gmail.com)
Date: 5 Nov 2006 16:25:50 -0800
Subject: Projecting MUD maps
In-Reply-To: <mailman.1793.1162765972.11739.python-list@python.org>
References: <mailman.1793.1162765972.11739.python-list@python.org>
Message-ID: <1162772750.486490.42520@m73g2000cwd.googlegroups.com>


BJ?rn Lindqvist wrote:
> Hello, I'm looking for an algorithm to project "MUD maps" such as the
> following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg
>
> MUD:s consists of rooms, each rooms has up to four orthogonal edges
> (north, east, west and south) that connects it to another room. So it
> is very easy to model a MUD as a directed graph. But projecting the
> graph on a surface is very complicated. For example, Room A:s North
> edge may connect it to Room B. But Room B:s South edge may connect it
> to Room C. Or another tricky example: Room A:s East edge connects it
> to Room B, whose East edge connect it to Room C, whose North edge
> connects it to Room D, whose West edge connects it to Room E, whose
> South edge connects it to Room A. In that example, there would be a
> "hole" between Room D and E.
>
> --
> mvh Bj?rn

I'm working on a text adventure where if the player types in n, w, e or
s he/she gets something back like "You go north, then turn around, then
look left, right . . . finally you realize that you have no idea in
which direction North is." It makes mapping more tedious, but also
simplifies it and gives you more freedom.

Or you could do something like this.

>>> rooms = [class instance, class instance, 0 (because there's no room here),
. . . . . . . . . . .0,                  , class instance]

But that would still only get you the mapping and not the
implimentation, and it's untested by me because I chose not to do it.

And for my closing remark:
You know the game Zork? The people who made that game never made a grid
or anything. I'd bet that in the class, they had a variable for NW, N,
NE, E, SE, S, SW and W, and they probably even had a U and D for
defining what rooms would be in those directions..



From deets at nospam.web.de  Sat Nov 18 12:30:09 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Nov 2006 18:30:09 +0100
Subject: basic python questions
In-Reply-To: <1163868656.416276.277310@m7g2000cwm.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
Message-ID: <4s8u91Fumc9aU1@mid.uni-berlin.de>

nateastle at gmail.com schrieb:
> I have taken the coments and think I have implemented most. My only

Unfortunately, no.

> question is how to use the enumerator. Here is what I did, I have tried
> a couple of things but was unable to figure out how to get the line
> number.
> 
> def Xref(filename):
>     try:
>         fp = open(filename, "r")
>     except:
>         raise "Couldn't read input file \"%s\"" % filename

You still got that I-catch-all-except in there.
This will produce subtle bugs when you e.g. misspell a variable name:

filename = '/tmp/foo'
try:
    f = open(fliename, 'r')
except:
    raise "can't open filename"


Please notice the wrong-spelled 'fliename'.

This OTOH will give you more clues on what really goes wrong:



filename = '/tmp/foo'
try:
    f = open(fliename, 'r')
except IOError:
    raise "can't open filename"


Diez


From gdamjan at gmail.com  Sun Nov 19 11:34:50 2006
From: gdamjan at gmail.com (Damjan)
Date: Sun, 19 Nov 2006 17:34:50 +0100
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>
	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>
	<mailman.408.1163844581.32031.python-list@python.org>
Message-ID: <45608799$0$49199$14726298@news.sunsite.dk>

> sure, the computing world is and has always been full of people who want
> the simplest thing to look a lot harder than it actually is.  after all,
> *they* spent lots of time reading all the specifications, they've bought
> all the books, and went to all the seminars, 

and have been sold all the expensive proprietary tools

> so it's simply not fair when others are cheating.

-- 
damjan


From sjmachin at lexicon.net  Sat Nov 25 20:39:22 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 17:39:22 -0800
Subject: Graph Data Structures
In-Reply-To: <mailman.728.1164502523.32031.python-list@python.org>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
	<1164495892.406863.10090@m7g2000cwm.googlegroups.com>
	<mailman.726.1164497654.32031.python-list@python.org>
	<1164498771.236820.232180@l12g2000cwl.googlegroups.com>
	<mailman.728.1164502523.32031.python-list@python.org>
Message-ID: <1164505162.061398.72660@f16g2000cwb.googlegroups.com>


Nathan Harmston wrote:
> Hi,
>
> It seems that by just going through the problem writing out a better
> explanation for the reply I have figured out a solution and the
> problem isnt as difficult as I thought it would be.

Often happens.

>
> What is a wontok?

It's Melanesian Pidgin (from the English "one talk") meaning a person
who speaks the same language as you, a member of your clan, ... the
context being that [at least in Papua New Guinea] there are relatively
many languages each with relatively not many speakers :-)

>
> Thanks
>
> Nathan
>
> PS --> the start of my reply:
>
> class Interval(object):
>      _id = "gene1"
>       _start = 50
>      _end = 200
>      _strand = 1
>
> class Sequence(object):
>     _sequence = "atgtcgtgagagagagttgtgag................."
>
> > Only vaguely. You use several terms which appear to be from your trade
> > jargon
>
> Sequence is a string made from a restricted alphabet (A,T,G,C...).
> Sequences can be aligned:          1     ATGCTGCAT
>                                                       2     TAGCTGTTA
>                                                                   -------
>                                                                  2        5

I'm sure they can be, but appearances can be deceptive when you mix
tabs and spaces -- or whatever caused the above 4 lines to be not
vertically aligned but staggered diagonally like a flight of ducks
heading equatorwards for winter.

Sometimes a line of code (e.g. str1[2:6] == str2[2:6]) is worth a
thousand pictures :-)

>
> I m trying to represent this as a graph Interval(id=1, start=2, end=6,
> strand=1) ---edge------Interval(id=2, start=2, end=6, strand=1)
>
> The problem is I was planning on storing the sequences in a dictionary
> {id:Seq}, however each dictionary would represent a different source
> of sequences. File1, File2....... (
> STORE THE SOURCES AS A DICT

Mapping what keys to what values?

> AND HAVE SOURCE IN INTERVAL ASWELL

So you had a data modelling problem. These are often better solved as a
separate step before you think about implementation details like
dictionaries.

Good luck with your project.

Cheers,
John



From sjmachin at lexicon.net  Fri Nov 24 03:30:05 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 00:30:05 -0800
Subject: Access to variable from external imported module
In-Reply-To: <mailman.658.1164324057.32031.python-list@python.org>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
	<mailman.658.1164324057.32031.python-list@python.org>
Message-ID: <1164357005.703346.35320@45g2000cws.googlegroups.com>


jim-on-linux wrote:
> GinTon,
>
> I think this is what you want.
>
>
> class Kdoi:

Is that a typo?

>    def __init__(self) :
>        self.Fdo()
>

What is all this K and F stuff?

>    def Fdo(self):
>
>      searchterm = 'help'
>      print searchterm     #local
>
>      self.searchterm = searchterm
>      print self.searchterm #used inside the class
>
>      Kdo.searchterm = searchterm   #<<<<
>      print Kdo.searchterm #used outside the class
>      Kdomore()
>
>
>
> class Kdomore(Kdo):
>      def __init__(self) :
>          self.Fdomore()
>
>      def Fdomore(self):
>          searchterm =  Kdo.searchterm   # <<<<
>          print searchterm

It's not apparent what the print statements are for -- are they part of
an attempt to debug your code?

What gives you the idea that this is what the OP wants or needs?



From gagsl-py at yahoo.com.ar  Wed Nov 15 20:00:02 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 22:00:02 -0300
Subject: Python v PHP: fair comparison?
In-Reply-To: <455babb2$0$20635$426a74cc@news.free.fr>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<mailman.182.1163566134.32031.python-list@python.org>
	<455babb2$0$20635$426a74cc@news.free.fr>
Message-ID: <7.0.1.0.0.20061115213724.06176608@yahoo.com.ar>

At Wednesday 15/11/2006 21:28, Bruno Desthuilliers wrote:

>Michael Torrie a ?crit :
> > On Tue, 2006-11-14 at 18:55 -0800, Luis M. Gonz?lez wrote:
> >
> >>>- Python is more readable, and more general purpose
> >>
> >>Yes, php is only for web.
> >
> > Absolutely false.
>
>  From a purely technical POV, you're of course right. But PHP has been
>hacked (nobody in it's own mind would pretend it has ever been
>'designed') for web programming, and since the language by itself is
>totally and definitively braindead, using it for anything else is either
>   masochism or lack of knowledge of better solutions. Heck, even Perl is
>better for pure admin/scripting tasks.

Someone here (= at work) needed to write some PDF 
reports, to be run from a bunch of ini-like 
files. Without much research nor analysis nor 
thinking nor approval, he said "let's use this 
php library!". Surely the reports came in a few days. But:
- another dependency was added to the project
- the .ini format -which was suposed to be an 
internal implementation detail- is now part of 
the public interfase to the report generator
- a lot of PHP code duplicates the original class hierarchy (in delphi)
- php sucks :)

Of course there are a lot of unrelated issues 
here, but I think that it's such a braindead 
language which turns people into braindead programmers :)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Sat Nov 11 17:20:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 23:20:10 +0100
Subject: reduce to be removed?
In-Reply-To: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
Message-ID: <ej5iao$6l3$2@sea.gmane.org>

Dustan wrote:

> What's an accumulation loop, and how would I convert this code so it's
> compatible with the future 3.0

the release of Python 3.0 is far away, and nobody knows how it's going 
to look.  trying to be future-compatible at this time is a major waste 
of time and (not quite as wasteful as reopening yet another old "let's 
make some pointless change to the language" thread, but almost).

surely you must have something better to do with your time ?

</F>



From sjmachin at lexicon.net  Sun Nov 19 05:46:19 2006
From: sjmachin at lexicon.net (John Machin)
Date: 19 Nov 2006 02:46:19 -0800
Subject: basic python questions
In-Reply-To: <1163919035.448029.242580@b28g2000cwb.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<1163917049.387309.150740@e3g2000cwe.googlegroups.com>
	<1163918698.063535.209970@k70g2000cwa.googlegroups.com>
	<1163919035.448029.242580@b28g2000cwb.googlegroups.com>
Message-ID: <1163933179.896199.122590@k70g2000cwa.googlegroups.com>


Paddy wrote:
> John Machin wrote:
>
>
> > [Aside] How are you going to explain all this to your instructor, who
> > may be reading all this right now?
> >
>
> The instructor should be proud!
> He has managed to do his very first post to a this newsgroup, about a
> homework question, and do it in the right way. that is no mean feat.
>
> - Paddy.

In fact, he may well by now know more than his instructor, and be
explaining the finer points of Python :-)



From robert.kern at gmail.com  Tue Nov 14 11:53:47 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 14 Nov 2006 10:53:47 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <02da01c707c2$8345fb80$03000080@hendrik>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>	<4558D443.1030802@hobbshouse.org>	<ejakm2$44p$1@sea.gmane.org><4558DBEF.8010409@hobbshouse.org>	<ejaqdh$q8v$1@sea.gmane.org>
	<02da01c707c2$8345fb80$03000080@hendrik>
Message-ID: <ejcsb8$979$1@sea.gmane.org>

Hendrik van Rooyen wrote:
>  "Robert Kern" <robert.kern at gmail.com> wrote:
> 
> 
>> Michael Hobbs wrote:
>>> True enough. Although, I have to ask how many times you define a new
>>> function only to have Python spit a syntax error out at you saying that
>>> you forgot a colon. It happens to me all the time. (Usually after an
>>> "else") If you'd never notice that the colon was missing if the compiler
>>> didn't point it out, is it really that readable? For me, I tend to get
>>> annoyed at language "features" that I'm constantly tripping over.
>> Never.
> 
> I confess I find myself in the position of a Yorkshire Youngster - I don't
> believe you!

Okay, not often enough or annoyingly enough for me to remember having done so.
Perhaps seven years ago when I started using Python, but not any time recent.

-- 
Robert Kern

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



From john106henry at hotmail.com  Thu Nov  9 16:30:36 2006
From: john106henry at hotmail.com (John Henry)
Date: 9 Nov 2006 13:30:36 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <mailman.2000.1163106067.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<1163102807.741768.195310@m73g2000cwd.googlegroups.com>
	<1163103151.772022.300950@k70g2000cwa.googlegroups.com>
	<mailman.2000.1163106067.11739.python-list@python.org>
Message-ID: <1163107834.877215.275380@k70g2000cwa.googlegroups.com>



Steve Holden wrote:

> >
> You may find that it starts out fine, but becomes less satisfactory as
> the sophistication of your interfaces increases. Then the problem will
> be that migration to another platform demands a substantial rewrite of
> your application (I have done this for a fairly small app).
>

It all depends on what you need.  You can always "drop down" to calling
wxPython.

> I don't think PythonCard gets much maintenance nowadays.
>

Funny you mention that.  I started that discussion on the PythonCard
list only yesterday.

While it's true that the web pages hasn't been updated to follow up
with the developments, I am delighted to learn that there has been
quite a bit of work going on.

Again, it all depends on what your needs are.  If you need to become
productive in a hurry,  and you are not exactly chasing after the
latest widget, my recommendation is to go with PythonCard.


> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb       http://holdenweb.blogspot.com
> Recent Ramblings     http://del.icio.us/steve.holden



From mail at microcorp.co.za  Mon Nov  6 01:08:25 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 6 Nov 2006 08:08:25 +0200
Subject: tips requested for a log-processing script
References: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>
Message-ID: <004701c70169$f95f1360$03000080@hendrik>

"Jaap" <jaap at nospaml.com> wrote:


> Python ers,
> As a relatively new user of Python I would like to ask your advice on
> the following script I want to create.
>
> I have a logfile which contains records. All records have the same
> layout, and are stored in a CSV-format. Each record is (non-uniquely)
> identified by a date and a itemID. Each itemID can occur 0 or more times
> per month. The item contains a figure/amount which I need to sum per
> month and per itemID. I have already managed to separate the individual
> parts of each logfile-record by using the csv-module from Python 2.5.
> very simple indeed.
>
> Apart from this I have a configuration file, which contains the list of
> itemID's i need to focus on per month. Not all itemID's are relevant for
> each month, but for example only every second or third month. All
> records in the logfile with other itemID's can be ignored. I have yet to
> define the format of this configuration file, but am thinking about a 0
> or 1 for each month, and then the itemID, like:
> "1 0 0 1 0 0 1 0 0 1 0 0 123456" for a itemID 123456 which only needs
> consideration at first month of each quarter.
>
> My question to this forum is: which data structure would you propose?
> The logfile is not very big (about 200k max, average 200k) so I assume I
> can store in internal memory/list?
>
> How would you propose I tackle the filtering of relevant/non-relevant
> items from logfile? Would you propose I use a filter(func, list) for
> this task or is another thing better?
>
> In the end I want to mail the outcome of my process, but this seems
> straitforward from the documentation I have found, although I must
> connect to an external SMTP-server.
>
> Any tips, views, advice is highly appreciated!
>
>
> Jaap
>
> PS: when I load the logfile in a spreadsheet I can create a pivot table
> which does about the same ;-] but that is not what I want; the
> processing must be automated in the end with a periodic script which
> e-mails the summary of the keyfigure every month.


I would do something like this: (obviously untested)

for line in readlines(open(logfile,r,1)):
    (code to get hold of item, date, amount)
    if item not in item_dict:
        item_dict[item] = [(date,amount)]
    else:
        item_dict[item].append(date,amount)

this will give you, for each unique item, a direct ref to wherever its been
used.

I would then work through the config file, and extract the items of interest for
the run date...

HTH - Hendrik





From gagsl-py at yahoo.com.ar  Fri Nov 17 19:49:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 17 Nov 2006 21:49:23 -0300
Subject: function for allocating memory for string array
In-Reply-To: <1163772870.781423.161550@k70g2000cwa.googlegroups.com>
References: <1163772870.781423.161550@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061117214601.040fc1b8@yahoo.com.ar>

At Friday 17/11/2006 11:14, Sheldon wrote:

>Can someone tell me how to remove the conflicts here ?

Wrong group!
Anyway, there is no need to reinvent the wheel, there are many array 
libraries for C...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From robert.kern at gmail.com  Sat Nov  4 01:48:32 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Nov 2006 00:48:32 -0600
Subject: numpy help
In-Reply-To: <eigffp$k58$1@sea.gmane.org>
References: <eigffp$k58$1@sea.gmane.org>
Message-ID: <eihd48$mvo$1@sea.gmane.org>

Chris Smith wrote:
> Howdy,
> 
> I'm a college student and for one of we are writing programs to
> numerically compute the parameters of antenna arrays. I decided to use
> Python to code up my programs. Up to now I haven't had a problem,
> however we have a problem set where we are creating a large matrix and
> finding it's inverse to solve the problem. To invert the matrix I've
> tried using numpy.numarray.linear_algebra.inverse and
> numpy.oldnumeric.linear_algebra.inverse which both give me the same
> error ( I was hoping they called different routines but I think they
> call the same one ).

You will want to ask numpy questions on the numpy mailing list, not here.

  http://www.scipy.org/Mailing_Lists

Both of the functions that you mention are compatibility functions for
transitioning code that used to use Numeric or numarray to numpy. Do not use
them in new code. The function you want is numpy.linalg.pinv().

> I've tried inverting small complex matrices and it worked fine. Does
> anyone know why it won't work for this larger matrix? Any ideas how I
> can work around this problem and get the correct inverse matrix?

Please cut your examples down to the smallest piece of self-contained code that
demonstrates the problem. Not only does that make it easier for us to give you
an answer, during the process, you will often locate and fix the problem yourself.

However, I believe your problem is in your BlockToeplitz function. You create an
array using the following:

      matrix = numpy.zeros((2*M*N,2*M*N), dtype = type(a))

You are passing in a list as the argument a. The above line will create an
object array which is not what you want. Since linalg.pinv() will eventually
call a LAPACK function which only knows about floats and complex floats, it
refuses the temptation to guess what you meant and raises an error.

-- 
Robert Kern

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



From tomas at fancy.org  Tue Nov 21 20:00:32 2006
From: tomas at fancy.org (Tom Plunket)
Date: Tue, 21 Nov 2006 17:00:32 -0800
Subject: Programmatically replacing an API for another module
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<4562de7f$0$21252$426a34cc@news.free.fr>
Message-ID: <rc57m29qq8m1uebvrkc9g7bcn9li38agdv@4ax.com>

Bruno Desthuilliers wrote:

> > I've got a bunch of code that runs under a bunch of unit tests.  It'd
> > be really handy if when testing I could supply replacement
> > functionality to verify that the right things get called without those
> > things actually getting called, since frequently those calls take a
> > long time to execute and do things that, well, I don't really want to
> > do.
> 
> Congratulation, you just rediscovered the MockObject.

How do I rediscover something that I'm explicitly implementing?  I had
set out specifically to mock an API, there was no rediscovery going
on.

That does allow me to discover via Google the Python Mock Module,
though, which may well do what I want:

from TestedModule import *

my_win32file = Mock({
   'CopyFile': 'CopyFile called'
   }

win32file = my_win32file

...perhaps.

I'm just a bit loathe to download and install more stuff when
something simpler appears to be near-at-hand.  ...especially
considering the page describing this module doesn't offer any download
links!  http://python-mock.sourceforge.net/


-tom!


From mike.klaas at gmail.com  Fri Nov 17 00:57:58 2006
From: mike.klaas at gmail.com (Klaas)
Date: 16 Nov 2006 21:57:58 -0800
Subject: cPickle problems
In-Reply-To: <1163730111.641857.142850@k70g2000cwa.googlegroups.com>
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
	<mailman.297.1163728684.32031.python-list@python.org>
	<1163730111.641857.142850@k70g2000cwa.googlegroups.com>
Message-ID: <1163743078.137817.271910@j44g2000cwa.googlegroups.com>


Jeff  Poole wrote:
> Good idea.  Well, I did that, and I found out that the object causing
> problems is a ParseResults object (a class from PyParsing) and that the
> __getstate__ member is in fact an empty string ('').  I'm not sure
> where this leaves me...  The PyParsing code clearly never creates such

Sounds like ParseResults is not intended to be pickable.

-Mike



From phil at riverbankcomputing.co.uk  Wed Nov 29 03:35:04 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Wed, 29 Nov 2006 08:35:04 +0000
Subject: [PyQt] windows problem
In-Reply-To: <1164787954.310842.13220@h54g2000cwb.googlegroups.com>
References: <1164787954.310842.13220@h54g2000cwb.googlegroups.com>
Message-ID: <200611290835.04454.phil@riverbankcomputing.co.uk>

On Wednesday 29 November 2006 8:12 am, hankpai at gmail.com wrote:
> Dumb question from extreme newbie.
>
> Steps so far:
> 1. Installed Python 2.5
> 2. Installed Qt 4.2.1 (with mingw) from executable
> 3. Installed PyQt 4.1 from executable
>
> Been trying to run the first example (t1.pyw) in the tutorials folder,
> but the following error pops up while running the from idle-python gui:
>
> Traceback (most recent call last):
>   File "C:/TestEnv/t1.pyw", line 7, in <module>
>     from PyQt4 import QtGui
> ImportError: DLL load failed: The specified module could not be found.

Make sure your PATH includes the directories containing the Qt and MinGW DLLs.

Phil


From sc0ttsm1th__at__yahoo__dot_com  Thu Nov  9 16:10:28 2006
From: sc0ttsm1th__at__yahoo__dot_com (Scott Smith)
Date: Thu, 9 Nov 2006 14:10:28 -0700
Subject: Vim/Python Help
References: <37d8e$45536caa$43b07816$714@msgid.meganewsservers.com>
	<mailman.1987.1163096064.11739.python-list@python.org>
Message-ID: <ce81b$45539946$43b07816$2104@msgid.meganewsservers.com>

Thank you!

Python Rocks!

"Tim Chase" <python.list at tim.thechases.com> wrote in message 
news:mailman.1987.1163096064.11739.python-list at python.org...
>> I am just getting into python and am trying to learn how to use the 
>> python.vim script.  I really like the fact that it autoindents for me 
>> while inserting defs etc, but how do I move my cursor to back to outer 
>> block (say at the end of a def) to continue with writing next def while 
>> still in insert mode?  Right now I have to get out of insert mode to do 
>> this....very annoying!
>
> If I understand what you're wanting, it sounds like you want an exdent 
> sort of command.
>
> Vim provides two variants within insert mode:
>
> 1) just plain control+D will exdent one 'shiftwidth'
>
> 2) typing a zero followed by a control+D will exdent you to the far left 
> margin
>
> You can read more in the help at
>
> :help i_CTRL-D
> :help i_0_CTRL-D
> :help i_^_CTRL-D
>
> (that last variant is more helpful for C/C++ coding than for Python, but 
> it's nice to know it's there)
>
> For future reference regarding vim related questions, I highly recommend 
> the vim mailing list, which you can find at www.vim.org which is almost 
> pure content (very high S/N ratio) and gives the python ML a run for its 
> money in terms of fast & accurate responses.
>
> -tkc
>
>
>
>
> 




From lycka at carmen.se  Fri Nov 17 05:17:06 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 17 Nov 2006 11:17:06 +0100
Subject: Is python for me?
In-Reply-To: <1163448523.712403.232970@i42g2000cwa.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
Message-ID: <ejk273$23u$1@wake.carmen.se>

I think Python is for you.

lennart wrote:
> Can you define 'large'? Is that large in code, or large in database? I
> don't know which database is supported. If its a external db, like
> MySql, the query is performed through the software of MySql, am I
> right? If I'm correct, the 'slowness' comes from the amount of code in
> python itself, not from the database.

I'm afraid dakman's comment wasn't really very helpful.

Size is not a problem in itself. Ok, if the code modules are very
large, you will have a larger startup time, but this is probably
even worse in lower level languages such as C/C++. The python byte
code works at a higher level of abstraction than machine code, so
the byte code files are much more compact than corresponding
executable binaries from e.g. C/C++/Delphi.

The Python programming language, with its classes, modules,
packages etc is in my experience much better for writing large 
applications without causing a mess than e.g. C++. It's much
easier to make a mess with C/C++'s "#include" than with Python's
"import". The lack of static typing means that some problems that
the compiler/linker would find in e.g. C++ development won't turn
up until you test your code in Python, but you'll get to testing
much faster with Python, and if you don't test well, you'll fail
with any larger development project however clever your compiler
and linker is.

Due to Python's very dynamic nature, there are a lot of operations
that will be much slower than in e.g. C or C++. For instance, if
you write "a = b + c" in C, the compiler knows at compile time what
types a, b and c are, and if they for example are ints, the addition
will be translated into a few very simple and quick machine code
instructions. In Python, the types typically won't be know until
runtime. This means that the objects need to be inspected during
execution to figure out what + means for these kinds of objects.
Python also handles memory allocation etc.

The consequence of this is that some kinds of programs that do
millions of trivial things, such as cryptography applications
where there are a lot of repeated multiplications and additions,
would be much, much slower in pure Python than in pure C. This
doesn't mean that Python is bad for a large group of applications.
It means that for a large group of applications, there are some
parts (for instance computationally intensive or e.g. interfacing
with some kind of devices or third party products) that should be
handled by extensions written in e.g. C.

Whatever you plan to do, it's likely that the extensions you need
already exists. There are such extensions for databases, networking,
maths, cryptography, XML parsing, etc etc. I'm a programmer working
with C, C++, Python, SQL etc, and despite 10 years of Python coding
I never actually needed to code any C extension myself yet. It's
very likely that you'll get away using 100% pure Python too. Note
that large parts of your programs will be C code, but C code you
didn't have to write yourself, and as far as your programming is
concerned it could as well have been Python, it's just that things
will run faster than if it had been pure Python...

Have fun!


From jcoleman at franciscan.edu  Fri Nov  3 09:27:05 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 3 Nov 2006 06:27:05 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162504602.877056.114150@h48g2000cwc.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<mailman.1677.1162490601.11739.python-list@python.org>
	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>
	<eideec$tk8$1@sea.gmane.org> <eidlpc$qfi$1@sea.gmane.org>
	<mailman.1690.1162501294.11739.python-list@python.org>
	<1162502997.175322.171730@e3g2000cwe.googlegroups.com>
	<mailman.1694.1162503933.11739.python-list@python.org>
	<1162504602.877056.114150@h48g2000cwc.googlegroups.com>
Message-ID: <1162564025.693329.299720@m73g2000cwd.googlegroups.com>


John Coleman wrote:
> Robert Kern wrote:
> > John Coleman wrote:
> > > Maybe I don't know what I'm looking for, but I downloaded Enthought a
> > > few days ago and don't seem to find MinGW on my system. There are 2
> > > relatively small (totalling about 13 kb IIRC) *python* files deeply
> > > buried in the distribution with mingw in their filename but nothing
> > > like a gcc compiler. I've mostly used visual studio or code warrior for
> > > C compiling, so again - maybe I don't know what I am looking for.
> >
> > It is in c:\Python24\Enthought\mingw32\, IIRC (I don't have it in front of me).
> > Add c:\Python24\Enthought\mingw32\bin\ to your PATH environment variable, and
> > gcc.exe should be executable.
> >
> I have no such sub-directory. I'll try an uninstall-install. When I did
> the original installation the installer hung at the end and I had to
> manually close it. The Python interpreter was there and worked properly
> and all of the goodies like numby and chaco were there so I wrote it
> off as nothing more then a failure to close properly, but evidently I
> missed an essential part of the installation.
>
> -John Coleman

Problem fixed. I had clicked on the 10-05-06 download (thinking that
enthought_setup-1.1.0.msi led to the set up the full enthought
package), but this is evidently only a partial download. I tried it a
second time with the same results, but perhaps I wasn't using the
"browse and install" option correctly (clicking that button on the
enstaller caused a lot of files to be transfered, but there didn't seem
to be any real list to browse). In any event, the August download
worked like a charm and had it all, including mingw. Thanks for your
help.

-John Coleman



From cvanarsdall at mvista.com  Tue Nov  7 18:01:28 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Tue, 07 Nov 2006 15:01:28 -0800
Subject: Pyro stability
In-Reply-To: <eir0ms$gle$1@sea.gmane.org>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<454dd84b$0$328$e4fe514c@news.xs4all.nl>	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>	<mailman.1827.1162864080.11739.python-list@python.org>	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>	<1162895554.549926.49280@k70g2000cwa.googlegroups.com>	<4550FC50.5040204@mvista.com>
	<eir0ms$gle$1@sea.gmane.org>
Message-ID: <45511048.8070107@mvista.com>

Steve Holden wrote:
> Carl J. Van Arsdall wrote:
>   
>> Paul Boddie wrote:
>>
>>     
>>> Beliavsky wrote:
>>>  
>>>
>>>       
>>>> Carl J. Van Arsdall wrote:
>>>>    
>>>>         
>>> [Enthusiasm for Pyro, not for those with sensitivity to rude words]
>>>
>>>  
>>>
>>>       
>>>> You should watch your language in a forum with thousands of readers.
>>>>    
>>>>         
>> I think you should find better things to complain about and not worry 
>> about language usage so much.
>>
>>     
> It didn't seem like an unreasonable request to me, though I concede that 
> you aren't (yet :-) known throughout Usenet for your profanity.
>
>   
Well, I wouldn't want to be known for it, but some technologies are just 
so A+mazing that I can't contain myself.  Pyro happens to be one of 
those great things where profanity *is* necessary.  I would never want 
to cheapen my emotion by leaving out colorful language ;)



-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From fredrik at pythonware.com  Thu Nov  2 07:28:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 13:28:22 +0100
Subject: ANN: wxPython 2.7.1.3
In-Reply-To: <eicli6$bcp$1@wake.carmen.se>
References: <mailman.1291.1161888414.11739.python-list@python.org>	<ehr6vs$258l$1@ulysses.news.tiscali.de>	<Sf90h.172$1n3.4082@news.tufts.edu>	<ehr80e$25cv$1@ulysses.news.tiscali.de>
	<eicli6$bcp$1@wake.carmen.se>
Message-ID: <eico94$686$1@sea.gmane.org>

Magnus Lycka wrote:

> The general policy for Python is to support version 2.n-1 when 2.n is
> the current version, but not older versions than that.

That's the policy for python-dev.  Library providers that care about the 
users should, if they possibly can, support older versions than that.

(especially if they *used* to support it; there's seldom any need to 
immediately remove *existing* support for a given Python version when
a new Python release arrives..)

</F>



From wifighost at earthlink.net  Fri Nov  3 03:46:04 2006
From: wifighost at earthlink.net (wifighost at earthlink.net)
Date: Fri, 3 Nov 2006 01:46:04 -0700
Subject: Directory Listing output to a file
Message-ID: <E1GfuhS-0007gQ-00@pop-siberian.atl.sa.earthlink.net>

Hi All,

 

            I am a newbie to the Python language and already love it. I am
working on my first script. I am trying to create a script that will get the
contents of a directory and export (output) that information in a file that
exists or creates. Mainly it's going to read my network drive and output all
the names of files and folders in that drive so I can have a list handy in a
txt file format. I am already working on the code an running into a few
snags. Please e-mail me if you can help, I will post the code on my web site
so those who e-mail me can see it.

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From max at alcyone.com  Wed Nov 29 15:28:13 2006
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 29 Nov 2006 12:28:13 -0800
Subject: type(foo) == function ?
In-Reply-To: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
References: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
Message-ID: <V5qdnXzkk976cPDYnZ2dnUVZ_uadnZ2d@speakeasy.net>

Hi Tom.

Tom Plunket wrote:

> I'd like to figure out if a given parameter is a function or not.
> 
> E.g.
> 
>>>> type(1)
> <type 'int'>
>>>> type(1) == int
> True
> 
> implies:
> 
>>>> def foo():
> ...   pass
> ...
>>>> type(foo)
> <type 'function'>
>>>> type(foo) == function
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'function' is not defined
> 
> Is there a way I can know if 'foo' is a function?

The type of a function is types.FunctionType:

 >>> import types
 >>> types.FunctionType
<type 'function'>
 >>> def f(): pass
...
 >>> type(f)
<type 'function'>
 >>> type(f) is types.FunctionType
True

However, this doesn't take into account methods (MethodType and 
UnboundMethodType).  In dynamically-typed languages in general, explicit 
typechecks are not a good idea, since they often preclude user-defined 
objects from being used.  Instead, try performing the call and catch the 
resulting TypeError:

 >>> f = 'asdf'
 >>> try:
...  f()
... except TypeError:
...  print "oops, f is not callable"
...
oops, f is not callable

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   There are not fifty ways of fighting, there is only one: to be the
    conqueror. -- Andrew Malraux, 1937


From gagsl-py at yahoo.com.ar  Fri Nov 24 20:33:35 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 22:33:35 -0300
Subject: How to pass a boolean to a stored proc using Cx_Oracle?
In-Reply-To: <ek25dr$3q6$1@sea.gmane.org>
References: <ek25dr$3q6$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061124223153.01fd22e0@yahoo.com.ar>

At Wednesday 22/11/2006 15:37, JG wrote:

>I am using Python 2.4 and cx_Oracle.  I have a stored proc that takes two
>arguments.  First is an NUMBER, second is a BOOLEAN.  How do you call that
>stored procedure?
>
>After properly extablishing a connection, I have something like this:
>
>cursor = con.cursor()
>cursor.callproc("testproc",[123,True])
>
>The problem I have ran into is that I keep getting an error from Oracle
>stating I don't have the variables defined in with the proper type.  I
>changed to proc just to test it, so that it would take two numbers.  I was
>able to make it run properly.
>
>So, what is the trick to pass a boolean?

I've never used cx_Oracle, but have you tried using 0/1 as False/True?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ggrp1.20.martineau at dfgh.net  Fri Nov  3 16:35:55 2006
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 3 Nov 2006 13:35:55 -0800
Subject: Make all files extension lower by a given directory name
References: <20061102044749.57630.qmail@web15006.mail.cnb.yahoo.com>
	<mailman.1655.1162475524.11739.python-list@python.org>
Message-ID: <1162589755.005063.297940@m73g2000cwd.googlegroups.com>

Tim Chase wrote, in part:
> ...
> I've found that Win32 doesn't often take a rename if the origin
> and destination differ only in case[*].  Thus, to change the
> case, I've had to do *two* renames...one to, say, prefix with an
> underscore and change the case to my desired case, and then one
> to strip off the leading underscore.  You might try a similar
> song-and-dance to strong-arm Windows into specifying the case of
> the file.  ...

FWIW, I just tried a file name case-only os.rename() on a file running
Win XP SP2 with Python 2.5 and it worked just fine -- i.e. changed
'TextFile.TXT' to 'TextFile.txt') with just a single call to
os.rename(), no error was raised, and the case of the letters in the
file name were changed properly. (I can also do the same thing at the
command line with a similar results.)

Perhaps you were using a different version of Windows or the os module
(silently) handles the situation. I do agree that this is arguably
strange behavior given how the OS mostly ignores case...

-mm



From sjmachin at lexicon.net  Sat Nov 25 18:52:51 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 15:52:51 -0800
Subject: Graph Data Structures
In-Reply-To: <mailman.726.1164497654.32031.python-list@python.org>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
	<1164495892.406863.10090@m7g2000cwm.googlegroups.com>
	<mailman.726.1164497654.32031.python-list@python.org>
Message-ID: <1164498771.236820.232180@l12g2000cwl.googlegroups.com>


Nathan Harmston wrote:
> Hi,
>
> The idea is that I m going to use it to build graphs for sequence
> alignment (at the moment), I read a discussion on the corebio
> (reimplementation of biopython) group about using intervals to
> represent sequence slices. The idea being that, my graph may contain
> millions of alignments and storing the sequence (the actual ATGC) is
> not required.
>
> class Node(object):
>      pass
>
> class Interval(Node):
>     _id = "gene1"
>      _start = 50
>     _end = 200
>     _strand = 1

What is the point of subclassing Node if it's just a dummy?

>
> class Sequence(object):
>     _sequence = "atgtcgtgagagagagttgtgag................."
>
> So one interval on one sequence would align to another interval from
> another sequence, but I want changes I make to the interval to be
> reflected in the representation later. If I reverse complement it i
> want the interval to store this information but the Sequence only
> shows this later on when I call use it calling repr or str.
>
> Do you get what I mean.

Only vaguely. You use several terms which appear to be from your trade
jargon as they are not understandable when interpreted in either the
context of Python-speak or ordinary English e.g. "sequence",
"alignment", "ATGC", "reverse complement", "interval".

Two options:
(a) communicate understandably
(b) wait till your wontoks are back from holidays.



From egbert.bouwman at hccnet.nl  Wed Nov 29 13:51:50 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Wed, 29 Nov 2006 19:51:50 +0100
Subject: SPE refuses.
Message-ID: <20061129185150.GA19765@hccnet.nl>

According to apt-show-versions I have installed:
    python-wxgtk2.6 2.6.3.2.1.5
    spe 0.8.2a+repack-1
    
However when I start SPE I get the message
You need to install at least wxPython v2.5.4.1 to run SPE

How do I tell SPE that I have the right wxPython ?
e.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From steve at holdenweb.com  Mon Nov 13 04:45:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:45:24 -0600
Subject: Decimal() instead of float?
In-Reply-To: <1163294604.4675.4.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
Message-ID: <ej9epb$e23$2@sea.gmane.org>

Michael B. Trausch wrote:
> Is there a way to use Decimal() by default in Python instead of float?  

No. You'll just have to be explicit.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From stuart at bmsi.com  Mon Nov 27 22:16:08 2006
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Mon, 27 Nov 2006 22:16:08 -0500
Subject: NFS server
References: <1164373253.607159.26260@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.28.03.16.08.61100@bmsi.com>

On Fri, 24 Nov 2006 05:00:53 -0800, srj wrote:

> i wish to develop an NFS server usin python from scratch( some wise guy
> told me i'ts easy!).
> can i get any kinda tutorial for this??
> 
> any suggestions on how 2 begin?

NFS is an RPC based protocol.  The first step is to be able to do
SunRCP/ONCRPC. Python has an 'xdrlib' which is how parameters are
marshalled, unmarshalled in sunrpc.  If allowed under "from scratch", you
could wrap the C rpc lib for python - they handle retries and other low
level stuff.  You could look "Remote Tea" for Java, and translate to
python to get a pure python oncrpc lib.  Or you could look for such a
package already written (a quick search didn't reveal any).

Once you have rpc, then it is "just" a matter of having your python server
implement the set of calls specified for NFS.  BTW, apparently python was
used for quickly building test rigs while developing NFS v4.

Having a framework for python NFS server could be useful - think custom
filesystem.  Although a python binding for fuse + C NFS server would
be more general (use locally as well as remotely).

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From tom at t0mb.net  Fri Nov 17 17:52:51 2006
From: tom at t0mb.net (tom)
Date: Fri, 17 Nov 2006 22:52:51 +0000
Subject: Inotify on netfilter socket
Message-ID: <455E3D43.5030404@t0mb.net>

Hi Guys,

I'm wondering if it's possible to set up an inotify watch on a netfilter 
socket.  I want to monitor for incoming packets to the netfilter QUEUE 
target, but I can't seem to do it. select.select works on it, but i 
wanted to use inotify really.  Is there any way to create a tangible 
file which i can hook in to the netfilter socket?  I was using 
python-inotify and the ipqueue module.  Any suggestions welcome, or do 
you guys think that this would be better on the iptables/netfilter 
mailing lists?

Cheers, Tom


From sarcasticzombie at gmail.com  Wed Nov 29 11:17:02 2006
From: sarcasticzombie at gmail.com (Sarcastic Zombie)
Date: 29 Nov 2006 08:17:02 -0800
Subject: Overloading "if object" unary operator
Message-ID: <1164817022.500511.295260@80g2000cwy.googlegroups.com>

Good morning,

If I have a class

class A:
    __init__(id)
        self.id = id

is there any way to overload the 'if' unary usage to detect if a
variable has a value?

For example, in the code:

a = A(56)
if a:
    print "Hoo hah!"

how can I insure that the if will come back true and fire off the print
if and only if self.id is defined? I want to do this in an overloaded,
generic way, if possible; I know that I could test for a.id.

Thanks so much!

-Jason Ledbetter



From paul at boddie.org.uk  Thu Nov 16 17:05:45 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 14:05:45 -0800
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
	<455cc9ae$1@news.unimelb.edu.au>
Message-ID: <1163714745.576178.157790@b28g2000cwb.googlegroups.com>

Maurice LING wrote:
>
> Say given cytoscape.jar, I'll like to be able to do this:
>
>  >>> from cytoscape javaimport cytoscape
>  >>> c = cytoscape()
>
> And the tighest way I see that this can be done is for Python VM to
> execute Java bytecodes like Python bytecodes. That is, Python VM
> executes Java bytecodes directly and not through object mapping which I
> think is that JPyPe is doing.

This kind of thing is what I wanted to do with my javaclass experiment,
but I lost motivation/momentum after getting only some of the things to
work. Translating Java bytecodes isn't hard for most of the instruction
set, although exception handling was awkward at the time (before Python
2.5's new-style Exception class), and I'd have to think through the
interpackage referencing problem again (circular references are not
typically a problem in the Java package hierarchy). In the end, I
couldn't justify spending the time in order to use certain pieces of
software that weren't so compelling after all.

> I must say that this is part of even a fluffier dream that one day, I
> can take any applications and play around with it in Python. Currently,
> my collaborators wrote in Perl and Java, so it is not easy for me to use
> their work in my work.

There's always Jython, as I tell the occasional person who tries
javaclass expecting it to be better than it is. That Jython doesn't
support the latest CPython features shouldn't be as huge a problem as
people suspect, especially if you just want to glue Java packages
together with Python. Otherwise, the PyLucene approach (gcj + bindings)
might be an acceptable approach: a well performing Free Software
solution even before the recent Java licensing events.

Paul



From ptmcg at austin.rr.com  Thu Nov 16 16:33:16 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Nov 2006 13:33:16 -0800
Subject: multi split function taking delimiter list
In-Reply-To: <1163547672.843601.135430@k70g2000cwa.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
	<1163547672.843601.135430@k70g2000cwa.googlegroups.com>
Message-ID: <1163712796.888562.182130@f16g2000cwb.googlegroups.com>

On Nov 14, 5:41 pm, "Sam Pointon" <free.condime... at gmail.com> wrote:
> On Nov 14, 7:56 pm, "martins... at gmail.com" <martins... at gmail.com>
> wrote:
>
> > Hi, I'm looking for something like:
>
> > multi_split( 'a:=b+c' , [':=','+'] )
>
> > returning:
> > ['a', ':=', 'b', '+', 'c']
>
> > whats the python way to achieve this, preferably without regexp?
>
> pyparsing <http://pyparsing.wikispaces.com/> is quite a cool package
> for doing this sort of thing.

Thanks for mentioning pyparsing, Sam!

This is a good example of using pyparsing for just basic tokenizing,
and it will do a nice job of splitting up the tokens, whether there is
whitespace or not.

For instance, if you were tokenizing using the string split() method,
you would get nice results from "a := b + c", but not so good from "a:=
b+ c".  Using Sam Pointon's simple pyparsing expression, you can split
up the arithmetic using the symbol expressions, and the whitespace is
pretty much ignored.

But pyparsing can be used for more than just tokenizing.  Here is a
slightly longer pyparsing example, using a new pyparsing helper method
called operatorPrecedence, which can shortcut the definition of
operator-separated expressions with () grouping.  Note how this not
only tokenizes the expression, but also identifies the implicit groups
based on operator precedence.  Finally, pyparsing allows you to label
the parsed results - in this case, you can reference the LHS and RHS
sides of your assignment statement using the attribute names "lhs" and
"rhs".  This can really be handy for complicated grammars.

-- Paul


from pyparsing import *

number = Word(nums)
variable = Word(alphas)
operand = number | variable

arithexpr = operatorPrecedence( operand,
    [("!", 1, opAssoc.LEFT),      # factorial
     ("^", 2, opAssoc.RIGHT),     # exponentiation
     (oneOf('+ -'), 1, opAssoc.RIGHT),  # leading sign
     (oneOf('* /'), 2, opAssoc.LEFT),   # multiplication
     (oneOf('+ -'), 2, opAssoc.LEFT),]  # addition
    )

assignment = (variable.setResultsName("lhs") +
                ":=" +
                arithexpr.setResultsName("rhs"))

test = ["a:= b+c",
        "a := b + -c",
        "y := M*X + B",
        "e := m * c^2",]

for t in test:
    tokens = assignment.parseString(t)
    print tokens.asList()
    print tokens.lhs, "<-", tokens.rhs
    print

Prints:
['a', ':=', ['b', '+', 'c']]
a <- ['b', '+', 'c']

['a', ':=', ['b', '+', ['-', 'c']]]
a <- ['b', '+', ['-', 'c']]

['y', ':=', [['M', '*', 'X'], '+', 'B']]
y <- [['M', '*', 'X'], '+', 'B']

['e', ':=', ['m', '*', ['c', '^', 2]]]
e <- ['m', '*', ['c', '^', 2]]



From gagsl-py at yahoo.com.ar  Thu Nov  9 19:27:22 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 21:27:22 -0300
Subject: urlretrieve get file name
In-Reply-To: <1163116359.787681.31490@m73g2000cwd.googlegroups.com>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
	<mailman.2004.1163115558.11739.python-list@python.org>
	<1163116359.787681.31490@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109212319.0592e6b8@yahoo.com.ar>

At Thursday 9/11/2006 20:52, Sven wrote:

>Thanks for your help, but I'm a guy with no luck. :-) I can't get the
>file name from response header...

Try using a browser and "Save as..."; if it suggests a file name, it 
*must* be in the headers - so look again carefully.
If it does not suggests a filen ame, the server is not providing one 
(there is no obligation to do so).


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Tue Nov 28 08:27:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 14:27:36 +0100
Subject: Dynamic/runtime code introspection/compilation
In-Reply-To: <1164717323.358146.65410@l39g2000cwd.googlegroups.com>
References: <1164717323.358146.65410@l39g2000cwd.googlegroups.com>
Message-ID: <ekhdg7$rm5$1@sea.gmane.org>

Thomas W wrote:

> from somemodule import ISomeInteface
> 
> d = compile(sourcecode)
> 
> myfoo = d.Foo()
> 
> print ISomeInterface in myfoo.__bases__
> 
> Any hints?

Python is a dynamic language, so compiling something won't tell you much 
about what the code actually does.  the only reliable way to do that is 
to execute the code:

     code = compile(sourcecode)
     namespace = {}
     exec code in namespace
     print issubclass(namespace["Foo"])

</F>



From m.yanowitz at kearfott.com  Fri Nov 17 11:42:03 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Fri, 17 Nov 2006 11:42:03 -0500
Subject: String Replace only if whole word?
In-Reply-To: <1163779402.3358.9.camel@dot.uniqsys.com>
Message-ID: <005701c70a67$4fbf8810$0d7d12ac@kearfott.com>



-----Original Message-----
From: Carsten Haese [mailto:carsten at uniqsys.com]
Sent: Friday, November 17, 2006 11:03 AM
To: Michael Yanowitz
Cc: python-list at python.org
Subject: RE: String Replace only if whole word?


On Fri, 2006-11-17 at 10:43 -0500, Michael Yanowitz wrote:
> >Your pattern would be "[^A-Za-z0-9_]word[^A-Za-z0-9_]"
> >
> >--
> >Juho Schultz
>
>
> Thanks.
>   This works great except for one thing:
>
> The character after the replacement is deleted, so that if I have
>      send_data (LAPTOP, test_string)
>     it would replace it with:
>      send_data (10.1.3.4 test_string)
>   (ignoring that the 10.1.3.4 is not quoted). The comma is missing.

If you actually wanted to use string replacement, you'd need a pattern
with look-behind and look-ahead assertions along the lines of
"(?<![A-Za-z0-9_])word(?![A-Za-z0-9_])".

Then again, I don't think string replacement is the right tool for the
job. You're saying that the file you are operating on in this fashion is
a Python script. Why don't you just place something like
LAPTOP="10.1.3.4" at the top of that file, or have the script read this
information from a configuration file?

-Carsten

  Thanks, works great (so far).
  Yeah, I am operating this on a Python script. However, I am working off
a requirement that the script be pre-processed and the strings replaced
before executing the script and that if there are any remaining (not
replaced)
names that I don't execute the script and report that some 'mnemonics' have
not been replaced.


Thanks:
Michael Yanowitz




From Lion623 at mail.com  Sun Nov  5 14:07:11 2006
From: Lion623 at mail.com (Brandon)
Date: 5 Nov 2006 11:07:11 -0800
Subject: Awesome Python Information
Message-ID: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>

Check out: www.ChezBrandon.com



From guenter.jantzen at prodv.de  Mon Nov 20 12:13:11 2006
From: guenter.jantzen at prodv.de (guenter.jantzen at prodv.de)
Date: 20 Nov 2006 09:13:11 -0800
Subject: n-dim permutation matrix/generator?
In-Reply-To: <ejsb3h$uue$1@news.albasani.net>
References: <ejsb3h$uue$1@news.albasani.net>
Message-ID: <1164042791.776262.308000@m73g2000cwd.googlegroups.com>

If your products are not too big you may use the following approach

def cross(*L):
    P=[()]
    for i in range(len(L)):
        P_=[]
        for p in P:
            for el in L[i]:
                P_.append(p+(el,))
        P = P_
    return P

if __name__ == '__main__':
    for x in cross((0,1,2), (0,1), (0,1)):
        print x



From fabio at NOSPAMchelly.net  Thu Nov 23 09:06:23 2006
From: fabio at NOSPAMchelly.net (Fabio Chelly)
Date: Thu, 23 Nov 2006 15:06:23 +0100
Subject: How do I separate my parameters with spawnv
References: <mn.bacc7d6b8e71c7ac.21770@NOSPAMchelly.net>
	<mailman.632.1164280206.32031.python-list@python.org>
Message-ID: <mn.bb8a7d6bbb005d2d.21770@NOSPAMchelly.net>

Thank you very much

-- 
Ceci est une signature automatique de MesNews.
Site : http://www.mesnews.net




From fredrik at pythonware.com  Tue Nov 14 06:16:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:16:03 +0100
Subject: PyFAQ: anyone seen aahz' thread tutorial ?
Message-ID: <ejc8hh$qft$1@sea.gmane.org>

and yes, has anyone seen Aahz or his OSCON2001 thread tutorial slides 
lately ?  as noticed here:

     http://effbot.org/pyfaq/how-do-i-program-using-threads.htm

they have disappeared from the starship?  any ideas where to look for them ?

</F>



From cousinstanley at hotmail.com  Fri Nov 24 14:18:14 2006
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Fri, 24 Nov 2006 13:18:14 -0600
Subject: SQLite3__Python2.3-SQLite__Problem
References: <1164325325_8617@sp6iad.superfeed.net>
Message-ID: <1164395893_13229@sp6iad.superfeed.net>


>  .... 
>  SQLite3 data bases created via the command line
>  and those created using the python2.3-sqlite package
>  version 1.0.1-2 from within a Python program 
>  are  not  compatible with each other .... 
>   
>  If I create an SQLite3 data base from the command line
>  and populate it with data, then I cannot use that db
>  from Python .... 
>   
>  If I create an SQLite3 data base from within Python
>  and populate it with data, then I cannot use that db
>  from the command line .... 
>  ....

   This problem is occuring under Debian GNU/Linux Sarge 
   using Python 2.3 ....

   This morning for a sanity check on myself
   I installed SQLite3 and PySQLite2 on a Win2K box
   running ActiveState Python 2.4 ....

   The only things that I had to change in the Python code
   for creating tables, inserting data, and querying the db
   that I'm also using under Debian were the import lines ....

     from .... import sqlite

     to ...... from pysqlite2 import dbapi2 as DB

   Using this setup under Win2K everything works as expected .... 

   That is SQLite3 data bases created either via the sqlite3 
   command line or from within Python are 100% transparent,
   and no errors are produced .... 

   I'm now off to look for a version of PySQLite2
   that is built for Debian Sarge and Python 2.3 
   to see if that might help to rectify the problem ....    
 

-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From jcarlson at uci.edu  Thu Nov  2 04:17:22 2006
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 02 Nov 2006 01:17:22 -0800
Subject: where the hell is the run command of PyPe editor?
Message-ID: <20061102011159.C0FE.JCARLSON@uci.edu>


daniel <daniel.huangfei at gmail.com> wrote:
> I'm trying to use PyPe, but I just got so frustrated when attempting to
> run a script, this is the very first feature I would use for an editor,
> OMG. I browsed through every single menu item and gave up...
> 
> any help would be appreciated,  (the most silly question ever, sounds
> like a new computer user. ;--(    )

I don't normally troll python-list, so sorry if this gets to you late,
but to answer your question; there are sample macros in the
macros/samples directory with recent PyPE distributions which include
both "run current script" and "run selected code" example macros.

If you have questions about PyPE in the future, feel free to email me
directly, including PyPE in the subject will make sure it gets past my
spam filter.

 - Josiah



From hakonrk at fys.uio.no  Sat Nov 11 17:38:15 2006
From: hakonrk at fys.uio.no (Haakon Riiser)
Date: Sat, 11 Nov 2006 22:38:15 +0000 (UTC)
Subject: httplib continuation packets
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>
	<mailman.2112.1163284210.11739.python-list@python.org>
Message-ID: <slrnelck6n.lf8.hakonrk@fox.venod.com>

[Fredrik Lundh]

> Haakon Riiser wrote:
>
>> Is this a bug in httplib or the web server?
>
> it could be that they're blocking requests from Python's urllib, of 
> course.  have you tried overriding the user-agent string ?

Yes, and it doesn't help.

By the way, this is the closest thing I've found in the bug tracker:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=547093&group_id=5470
The bug was closed in 2002 with this comment:

  "I changed httplib to send requests as a single packet in rev
   1.60.  The change was made to address a performance problem,
   but happens to fix the problem you had with the bogus
   server, too."

Has someone changed it back since then?

-- 
 Haakon


From Leo.Kislov at gmail.com  Tue Nov 28 07:30:17 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 04:30:17 -0800
Subject: Modifying every alternate element of a sequence
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
	<1164713164.043283.161370@l39g2000cwd.googlegroups.com>
	<1164715343.290824.239550@14g2000cws.googlegroups.com>
Message-ID: <1164717017.654685.326440@14g2000cws.googlegroups.com>

jm.suresh at no.spam.gmail.com wrote:
> Wow, I was in fact searching for this syntax in the python tutorial. It
> is missing there.
>  Is there a reference page which documents all possible list
> comprehensions.

There is actually only two forms of list comprehensions:
http://docs.python.org/ref/lists.html
[blah for x in expr] and [blah for x in expr if cond]

And here is reference page for slicing (note, it's not list
comprehension): http://docs.python.org/ref/slicings.html

  -- Leo



From carsten at uniqsys.com  Wed Nov  8 16:43:26 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 08 Nov 2006 16:43:26 -0500
Subject: decorators
In-Reply-To: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
References: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
Message-ID: <1163022206.3354.69.camel@dot.uniqsys.com>

On Wed, 2006-11-08 at 12:37 -0800, John Henry wrote:
> I must be very thick.  I keep reading about what decorators are and I
> still don't have a good feel about it.  See, for example:
> 
> http://alex.dojotoolkit.org/?p=564
> 
> and:
> 
> http://soiland.no/software/decorator
> 
> What exactly do I use decorators for?

Decorators are a tool for executing common code when a function is
defined and/or when it's called. This reduces code duplication by
allowing you to factor out commonly performed steps.

If you find yourself writing different functions that share a lot of
setup/teardown code, or if you find yourself doing a lot of repetitive
housekeeping for each function you're defining, decorators eliminate
this duplication.

You've already been given a bunch of different examples, so I won't bore
you with more contrived examples. If none of the examples make you say
"wow, I could use this" and if you don't find yourself writing
repetitive setup/teardown/housekeeping code, you can probably live quite
comfortably without using decorators.

-Carsten




From fuzzyman at gmail.com  Wed Nov  8 09:17:45 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Nov 2006 06:17:45 -0800
Subject: Python deployment options.
In-Reply-To: <1162985073.163257.110180@m73g2000cwd.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
Message-ID: <1162995465.419376.229440@f16g2000cwb.googlegroups.com>


Chris_147 wrote:
> king kikapu wrote:
> > Hi to all folks here,
> >
> > i just bought a book and started reading about this language.
> > I want to ask what options do we have to deploy a python program to
> > users that do not have the labguage installed ??
> >
> > I mean, can i make an executable file, or something that contains the
> > runtime and the modules that the program only use or am i forced to
> > download the language to the user machine so the .py  files can be run
> > ??
> >
> > Thanks in advance,
> >
> > king kikapu
>
> Well, on Windows you have to look for the Py2Exe package
> (www.py2exe.org)
> On Mac OS X you can use Py2App
> (http://undefined.org/python/py2app.html)
>
> Mind you, on Windows there is one big potentional problem: Python is
> compiled with Visual Studio 2003 and needs msvcr71.dll.  So Py2Exe
> wants to distribute that dll also, but if you don't have a valid Visual
> Studio license, you are not allowed to.
> It is explained further in this thread:
> http://groups.google.com/group/comp.lang.python/browse_frm/thread/bccb45b7dae7ddd5/dacec12e300a74d4#dacec12e300a74d4
>

I think that is an incorrect reading of the thread.

The *Python* developers need a valid Visual Studio license to
redistribute msvcr71.dll.

When you build an app with py2exe you are just bundling Python with
your application and so don't need the license.

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From sjmachin at lexicon.net  Fri Nov 24 13:41:17 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 10:41:17 -0800
Subject: Access to variable from external imported module
In-Reply-To: <mailman.685.1164390261.32031.python-list@python.org>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.658.1164324057.32031.python-list@python.org>
	<1164357005.703346.35320@45g2000cws.googlegroups.com>
	<mailman.685.1164390261.32031.python-list@python.org>
Message-ID: <1164393677.496060.174120@f16g2000cwb.googlegroups.com>


jim-on-linux wrote:
> On Friday 24 November 2006 03:30, John Machin
> wrote:
> > jim-on-linux wrote:
> > > GinTon,
> > >
> > > I think this is what you want.
> > >
> > >
> > > class Kdoi:
> >
> > Is that a typo?
>        No, it's a style. life seems to be easier
> to me if one is consistent, all my classes begin
> with K.

and end with "i"?

> >
> > >    def __init__(self) :
> > >        self.Fdo()
> >
> > What is all this K and F stuff?
> >
>    It's my style. life seems to be easier  to me
> if one is consistent all my function begin with
> F.

You left out a word; the correct way of phrasing that is: "All my
function _are_ begin with F" :-)

This appears to be a variation on "Hungarian notation"; google that for
opinions pro & con.

In a certain vernacular, it would be called "an effed concept" :-)

>
> I started doing things like this when the only way
> to debug was to read each line of code and try to
> figgure out if it was the problem.

When was that? Even years ago, there were slightly better ways. For
example, my first boss' boss was an enthusiastic coder and debugger and
also a workaholic. Colleagues who lived along the same railway line as
he and were foolish enough not to hide behind a newspaper could have
their morning or evening reverie disturbed by a cry of "Glad you're
here! I'll hold the listing, you hold the dump!". I get the impression
that debugging techniques have moved along a little bit since then. :-)

> They are my personal sign posts.
> > >    def Fdo(self):
> > >
>
> > >      searchterm = 'help'
> > >      print searchterm     #local
> > >
> > >      self.searchterm = searchterm
> > >      print self.searchterm #used inside the
> > > class
> > >
> > >      Kdo.searchterm = searchterm   #<<<<
> > >      print Kdo.searchterm #used outside the
> > > class Kdomore()
> > >
> > >
> > >
> > > class Kdomore(Kdo):
> > >      def __init__(self) :
> > >          self.Fdomore()
> > >
> > >      def Fdomore(self):
> > >          searchterm =  Kdo.searchterm   #
> > > <<<< print searchterm
> >
> > It's not apparent what the print statements are
> > for -- are they part of an attempt to debug
> > your code?
> >
> print shows the results wherever a print statement
> turns up the results = 'help' .
> I didn't run the code, and it has it has a coding
> error

I noticed.

> but if removed, the results should be;
>
>    searchterm = 'help'
>    self.searchterm = 'help'
>    Kdo.searchterm = 'help'

No, the result would be
help
help
help

Plug in a text-to-speech module and a phone dialer and you're done ;-)

>
>    Sound silly but many people have trouble with
> getting a variable from here to there in their
> code. This shows that it can be done
>
> > What gives you the idea that this is what the
> > OP wants or needs?
>
> If I remember right,  he refrased  his first
> question and asked a second one.
> Sometimes people don't take the time to write
> correctly, the questions that are really in their
> mind. So I guessed.  If Im wrong, he will ignore
> it.  If I'm right, he will use it.

With luck. Kindly consider another possibility: that you are wrong (or
just marching to the beat of your own tambourine) and he (or she) is a
newbie & will use it :-)

[snip]

HTH,
John



From Eric_Dexter at msn.com  Mon Nov 13 04:51:08 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 13 Nov 2006 01:51:08 -0800
Subject: Data structure for ordered sequence
In-Reply-To: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
Message-ID: <1163411468.025376.171210@k70g2000cwa.googlegroups.com>

There are probily better ways to do this.  The pil library has a
rectangle drawing feature, I would check through the docs of wxwindows
and tkinter unless this is homework because the pil people will not let
you distribute pils.  I am going to be looking for the same think let
me know if you get a better answer.

http://my.opera.com/yjfuk/blog/index.dml/tag/captcha


https://sourceforge.net/project/showfiles.php?group_id=156455
http://www.dexrow.com




jm.suresh at no.spam.gmail.com wrote:
> Dear all,
>  I am looking for a data structure to hold rectangles in a 2d space.
> Please point me to any module which does these operations:
>  Insert a rectangle into a particular co-ordinate.
>  Get the rectangle/s right/left/above/below side to a particular
> rectangle.
>  Get all the rectangles within a box
>  Delete a particular rectangle.
> 
> --
> thanks.
> Suresh



From kirby.urner at gmail.com  Sun Nov  5 13:55:58 2006
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: 5 Nov 2006 10:55:58 -0800
Subject: sneak peak:  pythonic math in the silicon forest
Message-ID: <1162752958.734466.243890@m73g2000cwd.googlegroups.com>


Greetings Pythoneers:

Per usual, I've been walking this talk in Portland "Open Source
Capital" Oregon revolving around Python as a math learning language,
viewing math as an extensible type system (like Python) with such
well-known inhabitants as Vector, Polynomial, Polyhedron and so on.

Whereas I've been adjunct faculty by day, piggy backing on Portland
State's bookkeeping, our Saturday Academy is in the midst of
transitioning to an independent 501(c)(3), which will be better for
fundraising (donors will know exactly where their money is going).

Saturday Academy was established by Silicon Forest executives such as
myself, but 23 years ago (i.e. before my time -- I'm aged forty nine or
forty ten or like that), so I'm like this next-gen with a lot of new
ideas inherited from the open source movement (a big part of Portland's
economy these days).

My first gig with this Academy was West Precinct, Hillsboro, a police
station serving a large migrant population of Anglo, Euro and Latino
Americans.  That was a Linux heavy experience, thanks to my co-teacher
Jerritt Collord, then of linuxfund.org and since moved on I know not
where.

Anyway, if you're a CS prof looking for cues, tips and/or tricks, you
might be interested in my writeups, which occur in my blog and
scattered in the various Python in Education groups, most notably
edu-sig and edupython here on Google.

Here're some blog links to get ya started.  Feel free to send further
inquiries by email:

http://worldgame.blogspot.com/2006/11/more-pythonic-mathematics.html
http://mybizmo.blogspot.com/2006/10/whiteboard-doodles.html

(includes digicam shots of my whiteboard doodles).

Other background:  Kirby was Guido's side kick at this year's
Shuttleworth Summit in London, starring Alan Kay, Helen King, other
luminaries, aimed at kicking off Project Kusasa, a way of teaching
analytical engineering type skills through TuxLabs and so forth in the
Republic of South Africa.  Kirby was also a volunteer xBase programmer
for the Royal Kingdom of Bhutan, Office of the National Budget and
Royal Insurance Company of Bhutan (RICB).

Kirby Urner
Ministry of Education
Python Nation
kirby.urner at gmail.com
urnerk at python.org



From tomas at fancy.org  Wed Nov  1 19:38:02 2006
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 01 Nov 2006 16:38:02 -0800
Subject: Win32 COM
Message-ID: <t3eik2d1uctiiniuc7ijopbladmo0epf3n@4ax.com>

I don't know anything about COM beyond the fact that I can look in the
OLE/COM browser to maybe figure out the API that an object has that I
need to operate on.  Usually this gets me by fine; I've written mostly
utilities for Developer Studio which work fine if a little slow, and a
bit of junk for some other bits of the MS Office suite.  However, now
I'm a bit stuck.

I've got this object, and the documentation and sample code imply that
I can just call this method I need to call on it, and ding-dong.  It's
for creating a "command" object to pass to the application, and it
works (or rather, is supposed to work) sorta like this:

  operation = win32com.client.Dispatch('AppHelper.AppParameter')
  operation.Command = 'A_Command_Name'
  operation.SetParameter('param1', 'value')

However, I get an attribute error on the SetParameter call, which
indicates that it doesn't exist.

So, I look at the object browser, and sure enough it isn't there.
However, there is a 'Parameter' method.  Oh wait, there are two.
There's one that takes the parameter name and (presumably) returns the
value, and there's another that takes the parameter name and the value
that it's set to.

Through fiddling with this thing in IPython, I found that I can do:

  operation.Parameter('foo')

...which throws an exception, but once that's been run, I can do what
I set out to do:

  operation.SetParameter('param1', 'value')

...and all is well.

Can anyone give me any tips as to what's going on here and what I
might be doing wrong?  I have /not/ run the makepy.py or whatever it
is, since when I roll this out to the team I don't want to have to run
that on every machine before it'll work, but if that's what I need to
do, well, so be it.  However, at this time I'm stumped as to what to
try except that I can have a dirty-feeling try/except bit to "enable"
that call...

thx,
-tom!


From bignose+hates-spam at benfinney.id.au  Thu Nov 23 00:33:43 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 23 Nov 2006 16:33:43 +1100
Subject: WSGI with mod_python (was: Python, WSGI, legacy web application)
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
Message-ID: <87lkm2via0.fsf_-_@benfinney.id.au>

"Graham Dumpleton" <grahamd at dscpl.com.au> writes:

> Look at mod_python for Apache. If you use it correctly you can on a
> page by page basis as need be, replace the existing PHP pages with
> equivalents written using Python. You could do this by programming
> right at the level of mod_python, or again, if done right by using
> WSGI on top of mod_python. If you need to maintain compatibility of
> URLs, you could even do things so that even though URLs use .php,
> that it maps to Python code underneath, thus easing any transition.

I was under the impression that WSGI in mod_python was a rather kludgy
way to do WSGI, but I don't know what the alternatives are. CGI?
Python http server (e.g. CherryPy)? Something else?

-- 
 \      "Compulsory unification of opinion achieves only the unanimity |
  `\     of the graveyard."  -- Justice Roberts in 319 U.S. 624 (1943) |
_o__)                                                                  |
Ben Finney



From rridge at csclub.uwaterloo.ca  Tue Nov  7 07:03:03 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 7 Nov 2006 04:03:03 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
	<7x7iyafg85.fsf@ruckus.brouhaha.com> <454DC638.2050802@v.loewis.de>
	<7x3b8voehm.fsf@ruckus.brouhaha.com>
Message-ID: <1162900982.976617.14430@b28g2000cwb.googlegroups.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> Ah, but in the case where the lock# signal is used, it's known that
> the data is not in the cache of the CPU performing the lock operation;
> I believe it is also known that the data is not in the cache of any
> other CPU. So the CPU performing the LOCK INC sequence just has
> to perform two memory cycles. No cache coherency protocol runs
> in that case.

Paul Rubin wrote:
> How can any CPU know in advance that the data is not in the cache of
> some other CPU?

In the case where the LOCK# signal is asserted the area of memory
accessed is marked as being uncachable.  In a SMP system all CPUs must
have the same mapping of cached and uncached memory or things like this
break.  In the case where the LOCK# signal isn't used, the MESI
protocol informs the CPU of which of it's cache lines might also be in
the cache of another CPU.

> OK, this is logical, but it already implies a cache miss, which costs
> many dozen (100?) cycles.  But this case may be uncommon, since one
> hops that cache misses are relatively rare.

The cost of the cache miss is the same whether the increment
instruction is locked or not.

                                  Ross Ridge



From malaclypse2 at gmail.com  Sat Nov 25 09:16:18 2006
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Sat, 25 Nov 2006 09:16:18 -0500
Subject: The Python Papers Edition One
In-Reply-To: <pan.2006.11.25.05.59.48.69507@REMOVE.THIS.cybersource.com.au>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
	<mailman.703.1164432447.32031.python-list@python.org>
	<pan.2006.11.25.05.59.48.69507@REMOVE.THIS.cybersource.com.au>
Message-ID: <16651e80611250616r2f428b08s2cb9d0aa697fc557@mail.gmail.com>

On 11/25/06, Steven D'Aprano <steve at remove.this.cybersource.com.au> wrote:
> And how do you think this is different from any other publication? That
> Python Papers is under a CC licence is a red-herring.

Well, the CC license is viral.  According to the CC explanation of the
Attribution-NonCommercial-ShareAlike license I am free to create a
derivative work, but only if I then release that work under an
identical license.  When I look at the Python Cookbook, it doesn't
seem to encumber derived works the same way.  Instead, the Python
Cookbook page says "Except where otherwise noted, recipes in the
Python Cookbook are published under the Python license."  The Python
license is extraordinarily broad in what I'm allowed to do with it,
including reusing code in a commercial project.

> Again, how is this different from any other publication? Unless you only
> read public domain publications, anything you read is copyrighted, and
> your arguments apply just as much -- perhaps more so -- depending on the
> licence of that publication.

Yes, of course.  Thus, I have to avoid using code out of any
publication with a viral non-commercial license if there's any chance
my code will be sold commercially. For the same reason, I won't take
code from a GPL'd product and reuse it in a commercial project without
getting a commercial license from the copyright holder.

By the way, I wasn't really trying to complain about the Python
Paper's choice of license.  I just wanted to give my perspective on
why the licensing terms make it unsuitable for me.  The copyright
holders are welcome to release their work under any terms they are
comfortable with.

-- 
Jerry

-- 
Jerry


From slav0nic at xss.ru  Thu Nov  2 13:54:50 2006
From: slav0nic at xss.ru (slav0nic)
Date: Thu, 02 Nov 2006 20:54:50 +0200
Subject: Forum written in Python?
In-Reply-To: <Xns986FB78516025mosornet@161.53.160.64>
References: <Xns986FB78516025mosornet@161.53.160.64>
Message-ID: <eideui$9di$1@sage.ukr.net>

Karlo Lozovina ?????:
> Are there any forum or bulletin board systems written entirely in Python? 
> I got sick of PhpBB, mostly because I can't tweak and fiddle with the 
> code, since I really don't like PHP and don't know it that well.
> 
> I thought of writting my own simple forum software, but if there are 
> existing projects out there, I wouldn't mind contributing. So far I found 
> out about Pocoo, but it seems to immature right now, I was looking for 
> something comparable to PhpBB or IPB?
> 
> 
Django-based:
http://wiki.woodpecker.org.cn/moin/UliPad
http://zyons.com

-----------
http://python.com.ua


From jdunck at gmail.com  Thu Nov 23 10:34:58 2006
From: jdunck at gmail.com (jdunck)
Date: 23 Nov 2006 07:34:58 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
Message-ID: <1164296097.978489.105460@k70g2000cwa.googlegroups.com>


tleeuwenburg at gmail.com wrote:
> 1.) It takes too many clicks to download.
> A) We know, but it's like that to save our server. We will be
> publishing to a number of online archives, back-issues may be
> back-linkable from those.

Please consider using S3, coral cache, or similar to distribute, if the
server limitations are a cause of fewer people reading.

I'd be happy to help you get going with S3 if you like, otherwise,
coral CDN couldn't be simpler to use (if a bit unstable).



From nick at craig-wood.com  Tue Nov  7 04:30:05 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 07 Nov 2006 03:30:05 -0600
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<Tq6dnYTmJdBaL9LYnZ2dnUVZ_tydnZ2d@comcast.com>
Message-ID: <slrnel0k0b.nlj.nick@irishsea.home.craig-wood.com>

Larry Bates <larry.bates at websafe.com> wrote:
>  John Salerno wrote:
> > Let's say I'm making a game and I have this base class:
> > 
> > class Character(object):
> > 
> >     def __init__(self, name, stats):
> >         self.name = name
> >         self.strength = stats[0]
> >         self.dexterity = stats[1]
> >         self.intelligence = stats[2]
> >         self.luck = stats[3]
> > 
> > Is this a good way to assign the values to the different attributes?
> > Should 'stats' be a list/tuple (like this), or should I do *stats instead?
> > 
> > I'm trying to think ahead to when I might want to add new attributes,
> > and I want to make sure this doesn't get crazy with individual
> > parameters instead of just the one list.
> > 
> > Or maybe there's some way to loop through two lists (the stats and the
> > attributes) and assign them that way? I was thinking of a nested for
> > statement but that didn't seem to work.
> 
>  Sounds like what you should be doing is something like keyword arguments
>  instead.
> 
>  class Character(object):
>      def __init__(self, name, **kwargs):
>          self.name=name
>          for key, value in kwargs.items():
>              setattr(self, key, value)
> 
> 
>  z=Character('name', strength=10, dexterity=5, intelligence=3,
>  luck=0)

I would say this is a bad idea because you'll get no error messages if
you mis-spell 'dexterity' for instance.

I'd prefer to see a bit more error checking, something like

class Character(object):
    attributes = set(['strength', 'dexterity', 'intelligence', 'luck'])
    def __init__(self, name, **kwargs):
        self.name=name
        for key, value in kwargs.items():
            if key not in self.attributes:
                raise AttributeError("Bad attribute %s for %s" % (key, self.__class__.__name__))
            setattr(self, key, value)


z = Character('name', strength=10, dexterity=5, intelligence=3, luck=0)

    >>> Character('name', strength=10, dexterity=5, intelligence=3, luck=0)
    <Character object at 0xb7dac72c>
    >>> Character('name', strength=10, dextrity=5, intelligence=3, luck=0)
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
      File "z.py", line 7, in __init__
        raise AttributeError("Bad attribute %s for %s" % (key, self.__class__.__name__))
    AttributeError: Bad attribute dextrity for Character
    >>>

You can then add to attributes in the subclasses

class MagicCharacter(Character):
    attributes = Character.attributes | set(['spells', 'wand'])

    >>> MagicCharacter('name', strength=10, dexterity=5, intelligence=3, luck=0, spells=1)
    <MagicCharacter object at 0xb7ce86ac>
    >>>

If I was writing this, I'd probably just stick to named parameters
unless I had more than 10 parameters.  Named parameters are easy to
manage, and you never get confused by their position.

Also pychecker understands named parameters where as if you use a
scheme like the above you'll cause pychecker problems!

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


From fuzzyman at gmail.com  Sat Nov 25 09:25:08 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Nov 2006 06:25:08 -0800
Subject: The Python Papers Edition One
In-Reply-To: <4567ee43$1@news.unimelb.edu.au>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
	<mailman.703.1164432447.32031.python-list@python.org>
	<4567ee43$1@news.unimelb.edu.au>
Message-ID: <1164464708.512533.213840@l12g2000cwl.googlegroups.com>


Maurice LING wrote:
[snip..]
> As Steven mentioned -- anything you can read is copyrighted. The
> difference is whether is the copyright effective or enforceable. What do
> I mean by this? Without copyright, there will not be plagarism. Ask
> yourself this question, can you copy William Shakespeare's MacBeth and
> submit it as a literary work for a Master of Literary Arts degree? I
> believe the candidate will be expelled from university. William
> Shakespeare's MacBeth is still copyrighted work but not "enforceable"
> because it is pre-1900's work and the author had been dead for more than
> 50 years. Similarly, works in public domain are still copyrighted --
> academically, using work in public domain without attribution (giving
> credits in the form of citations) is still plagarism.
>

This is very, very incorrect. :-)

You're mixing your own moral ethics with an incorrect understanding of
what copyright means...

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From ardsrk at gmail.com  Thu Nov  2 07:46:00 2006
From: ardsrk at gmail.com (ArdPy)
Date: 2 Nov 2006 04:46:00 -0800
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
Message-ID: <1162471560.711687.73950@b28g2000cwb.googlegroups.com>


elderic wrote:
> Hi there,
>
> are there other ways than the ones below to check for <type 'function'>
> in a python script?
> (partly inspired by wrapping Tkinter :P)
>
> def f():
>    print "This is f(). Godspeed!"
>
> 1.: --> sort of clumsy and discouraged by the docs as far as I read
> import types
> type(f) is types.FunctionType
>
> 2.: --> I don't like this one at all
> def null(): pass
> type(f) is type(null)
>
> Basically I'm searching for something like:
> "type(f) is func" like in: "type(x) is int"
>
> Any ideas? =)

you could use assert. Like the one below

assert inspect.isfunction(function_name)



From cliff at develix.com  Wed Nov  8 13:20:04 2006
From: cliff at develix.com (Cliff Wells)
Date: Wed, 08 Nov 2006 10:20:04 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <45521E09.8050108@mvista.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>
	<1163001215.177739.238130@k70g2000cwa.googlegroups.com>
	<45521E09.8050108@mvista.com>
Message-ID: <1163010004.3371.23.camel@localhost.localdomain>

On Wed, 2006-11-08 at 10:12 -0800, Carl J. Van Arsdall wrote:
> BartlebyScrivener wrote:

> > I agree. And Python is an extremely serious matter calling for decorum
> > and propriety.
> >   
> Lol, is it really now?  And I suppose its your definition of decorum and 
> not mine right?  Things like that are always relative.  I think decorum 
> would state that you should be an adult and not make a big deal out of 
> nothing.  But that's just me, and as I said, its all relative.

I think you missed the irony in his statement (or perhaps confused
BartlebyScrivener with Beliavsky, who was the original plaintiff).

Regards,
Cliff



From horpner at yahoo.com  Wed Nov 29 10:43:34 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 29 Nov 2006 16:43:34 +0100
Subject: How to detect what type a variable is?
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
Message-ID: <slrnemranj.o0.horpner@FIAD06.norwich.edu>

On 2006-11-29, Grant Edwards <grante at visi.com> wrote:
> On 2006-11-29, Leandro Ardissone <lardissone at gmail.com> wrote:
>
>> I want to know what type is a variable. For example, I get the
>> contents of an xml but some content is a list or a string, and
>> I need to know what type it is.
>
>>>> x = 'asdf'
>>>> type(x)
><type 'str'>
>>>> i = 0
>>>> type(i)
><type 'int'>

That makes me wonder how he manages to store Python objects in
xml.

-- 
Neil Cerutti


From sjmachin at lexicon.net  Wed Nov  1 05:17:55 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Nov 2006 02:17:55 -0800
Subject: High level csv reader
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
Message-ID: <1162376275.356098.276480@e3g2000cwe.googlegroups.com>

George Sakkis wrote:
> It occured to me that most times I read a csv file, I'm often doing
> from scratch things like assigning labels to columns, mapping fields to
> the appropriate type, ignoring some fields, changing their order, etc.
> Before I go on and reinvent the wheel, is there a generic high level
> wrapper around csv.reader that does all this ?
>

Hi George,

Firstly one thing to remember: if you are going to reinvent the wheel,
don't forget to also reinvent the axle :-)

AFAIK there is no such animal.

I would need a lot of persuasion that a wrapper or toolbox wasn't just
overhead with little benefit. For example, ignoring some fields and/or
changing the order of others can be done rather simply:

|  >>> inrow
| ['a', 'b', 'c', 'd', 'e', 'f']
Suppose we want to ignore the "vowels" and reverse the order of the
others:
| >>> outrow = list(inrow[k] for k in (5, 3, 2, 1))
| >>> outrow
| ['f', 'd', 'c', 'b']

I don't see the value in creating (and documenting!) a one-line
function

def gather_list_items(input_list, item_map):
    return list(input_list[k] for k in item_map)

NB something like this is already in the mx kit somewhere IIRC.

Cheers,
John



From simon at brunningonline.net  Mon Nov 13 09:05:20 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Mon, 13 Nov 2006 14:05:20 +0000
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej3vbg$r81$2@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net> <ej2nrk$qea$2@sea.gmane.org>
	<022001c7055a$b24c7860$03000080@hendrik> <ej3vbg$r81$2@sea.gmane.org>
Message-ID: <8c7f10c60611130605i382312c4l829d6167ae0a5828@mail.gmail.com>

On 11/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Hendrik van Rooyen wrote:
>
> >> blue is red or green or yellow
> >
> > *grin* - this can be construed as a weakness in Python -
>
> it's boolean logic, and it's incompatible with human use of the same
> terms in all contexts, not just Python.

Indeed.

The other day, I way showing my eight year old, Freja, what a program
looks like:

your_name = raw_input("What's your name? ")
if your_name.lower() == "freja":
    print "You're very stinky,", your_name
else:
    print "You smell lovely, ", your_name

After running it a couple of times, she dove in and changed the 2nd line to:

if your_name.lower() == "daddy or ella":

(Ella is my other daughter's name.) That's pretty close to correct,
I'd say - but you don't get anything for being close in a programming
language.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From jacob.rael at gmail.com  Tue Nov 28 17:03:54 2006
From: jacob.rael at gmail.com (Jacob Rael)
Date: 28 Nov 2006 14:03:54 -0800
Subject: Simple text parsing gets difficult when line continues to next
	line
In-Reply-To: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
Message-ID: <1164751434.575231.69680@h54g2000cwb.googlegroups.com>

Thanks all. I think I'll follow the "don't do that" advice.

jr

Jacob Rael wrote:
> Hello,
>
> I have a simple script to parse a text file (a visual basic program)
> and convert key parts to tcl. Since I am only working on specific
> sections and I need it quick, I decided not to learn/try a full blown
> parsing module. My simple script works well until it runs into
> functions that straddle multiple lines. For example:
>
>   Call mass_write(&H0, &HF, &H4, &H0, &H5, &H0, &H6, &H0, &H7, &H0,
> &H8, &H0, _
>                 &H9, &H0, &HA, &H0, &HB, &H0, &HC, &H0, &HD, &H0, &HE,
> &H0, &HF, &H0, -1)
>
>
> I read in each line with:
>
> for line in open(fileName).readlines():
>
> I would line to identify if a line continues (if line.endswith('_'))
> and concate with the next line:
>
> line = line + nextLine
>
> How can I get the next line when I am in a for loop using readlines?
> 
> jr



From gilbert3b2g at msn.com  Sat Nov 18 10:42:58 2006
From: gilbert3b2g at msn.com (jim)
Date: 18 Nov 2006 07:42:58 -0800
Subject: decompiler
Message-ID: <1163864577.987875.64990@m7g2000cwm.googlegroups.com>

where can I find a free decompile that I can run in windows xp



From sjmachin at lexicon.net  Mon Nov 20 02:58:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 19 Nov 2006 23:58:59 -0800
Subject: rpncalc-2.5 RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>
	<mailman.491.1164004338.32031.python-list@python.org>
Message-ID: <1164009539.310173.248620@m7g2000cwm.googlegroups.com>

Hendrik van Rooyen wrote:
> "Raymond L. Buvel" <levub137 at wi.rr.com> wrote:
>
>
> > The rpncalc package adds an interactive Reverse Polish Notation (RPN)
>
> Can anyone remember who the Pole was and how his name is spelled?
>
> (no fair googling)

Remember who: yes
Remember spelling: you must be joking; however I do remember that the
name is given in Knuth TAOCP vol 3 as a test case for the soundex
algorithm.

name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
:-)

The first letter is LATIN CAPITAL LETTER L WITH STROKE.

Cheers,
John



From cameron.walsh at gmail.com  Fri Nov 10 01:12:16 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Fri, 10 Nov 2006 14:12:16 +0800
Subject: Printing to file, how do I do it efficiently?
Message-ID: <ej155s$n3k$1@enyo.uwa.edu.au>

Hi all,

I have a numpy.array of 89x512x512 uint8's, set up with code like this:


data=numpy.array([],dtype="uint8")
data.resize((89,512,512))
# Data filled in about 4 seconds from 89 image slices
<snip lots of processing code>


I first tried writing this data to a binary raw format (for use in a
program called Drishti) as follows:

# The slow bit:
volumeFile=file("/tmp/test.raw","wb")
for z in xrange(Z):
    for y in xrange(Y):
        for x in xrange(X):
            volumeFile.write("%c" %(data[z,y,x]))
volumeFile.close()

That took about 39 seconds.

My second attempt was as follows:
volumeFile = open("/tmp/test2.raw","wb")
data.resize((X*Y*Z)) # Flatten the array
for i in data:
    volumeFile.write("%c" %i)
data.resize((Z,Y,X))
volumeFile.close()

This took 32 seconds.  (For those of you unfamiliar with numpy, the
data.resize() operations take negligible amounts of time, all it does is
allow the data to be accessed differently.)

I'm guessing that the slow part is the fact that I am converting the
data to character format and writing it one character at a time.  What
is a better way of doing this, or where should I look to find a better way?


Thanks,

Cameron.


From stargaming at gmail.com  Sun Nov  5 13:55:48 2006
From: stargaming at gmail.com (Stargaming)
Date: Sun, 05 Nov 2006 19:55:48 +0100
Subject: forwarding *arg parameter
In-Reply-To: <2Fp3h.195$7b6.100@read3.inet.fi>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
Message-ID: <eilc3m$301a$1@ulysses.news.tiscali.de>

Tuomas schrieb:
> Tuomas wrote:
> 
>> def g(*arg):
>>     return arg
>>
>> def f(*arg):
>>     return g(arg)
>>
>> How can g know if it is called directly with (('foo', 'bar'),) or via 
>> f with ('foo', 'bar'). I coud write in f: return g(arg[0], arg[1]) if 
>> I know the number of arguments, but what if I don't know that in 
>> design time?
> 
> 
> So it seems that I would like to have an unpack operator:
> 
> def f(*arg):
>     return(!*arg)
> 
> TV

Either you take one of the snippets here:
http://aspn.activestate.com/ASPN/search?query=flatten&section=PYTHONCKBK&type=Subsection
or just use arg[0] clever (as mentioned a few times in this thread).


From jstroud at mbi.ucla.edu  Wed Nov  1 23:11:55 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 02 Nov 2006 04:11:55 GMT
Subject: Regular Expression for a string
In-Reply-To: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
Message-ID: <fee2h.38$Mw.8@newssvr11.news.prodigy.com>

Teja wrote:
> HI all,
> 
> I need to write a regular experssion for a string which satisfies the
> following a criteria :
> 
> 1) it should start with an alphabet
> 2) it can contain alphabets/digits/_ from second character
> 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional
> 
>  can any one please help me out.... pls....
> 
> 
> Teja.P
> 

This is as general as could be constructed given your vague requirements:

"[a-zA-Z][a-zA-Z0-9_]+"

You may need to provide examples.

James



-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From luistrigueiros at gmail.com  Sun Nov 26 10:50:28 2006
From: luistrigueiros at gmail.com (luistrigueiros at gmail.com)
Date: 26 Nov 2006 07:50:28 -0800
Subject: InProc COM server for Excel supporting several versions of Excel
Message-ID: <1164556228.437689.205090@14g2000cws.googlegroups.com>

Hi list,
At the moment at work I have to maintain one Excel spreadsheet that has
plenty of VBA code that performs validation of the data the user
inserts, it must conform to certain business rules.
I would like to replace the VBA code for one InPoc COM server DLL made
in python.
I read the Python Progamming on Win32 book, and I know that how to do
this in python and to use py2exe to produce the DLL and how to register
the COM server DLL manually.
My question is how can I support several versions of Excel (2000,XP,
2003) in may COM server ?
Because my users would run it in machines having diferent versions of
Excel and would not like to say I only support version XXXX. I am
thinking in using early binding for the COM server.
Has anyone done something similar, any advices would be much
appreciated.
Thanks, Luis



From gmarkowsky at gmail.com  Tue Nov  7 10:15:09 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 7 Nov 2006 07:15:09 -0800
Subject: Simple Tkinter problem
In-Reply-To: <slrnel1763.1mk.horpner@FIAD06.norwich.edu>
References: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>
	<slrnel1763.1mk.horpner@FIAD06.norwich.edu>
Message-ID: <1162912508.718047.278290@m7g2000cwm.googlegroups.com>

Here's my Tkinter class:

class TwoChoice:
    def __init__(self, master):

        frame = Frame(master)
        frame.pack()
        m = Label(root, text= maentry)
        m.pack()
        n = Label(root, text= fave)
        n.pack()

        self.button = Button(frame, text=home_team, command=
self.comm_1)
        self.button.pack(side=LEFT)

        self.hi_there = Button(frame, text=vis_team,
command=self.comm_2)
        self.hi_there.pack(side=LEFT)

    def comm_1(self):
        print home_team
        root.quit()

    def comm_2(self):
        print vis_team
        root.quit()

I call it by

root = Tk()
gui= TwoChoice(root)
root.mainloop()

The next time I call it I want to just run the same thing but with
different values for the variables. Instead it gives me like two copies
of the widget.

Greg

Neil Cerutti wrote:
> On 2006-11-07, gmarkowsky at gmail.com <gmarkowsky at gmail.com> wrote:
> > I'm trying to write a GUI that will put up multiple widgets in
> > succession. My problem is that each widget also contains the
> > previous widgets when they pop up. How do I reinitialize the
> > widget each time so that it doesn't contain earlier ones?
>
> Show your code.
>
> > Actually, another question I have is, is there a way to set
> > python so that it will assume any undefined variable is 0 or
> > ''? That is, I have several statements like "If k > 0 then so
> > and so" and I would like it to assume k=0 unless I tell it
> > otherwise. I've just been defining k=0 at the start of the
> > program but it seems there should be a better way.
>
> The best way to do it is to never use undefined names.
> 
> -- 
> Neil Cerutti
> If only faces could talk. --Pat Summerall



From fuzzyman at gmail.com  Thu Nov  2 08:49:28 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Nov 2006 05:49:28 -0800
Subject: The Python Journal
In-Reply-To: <1162474966.333979.31610@i42g2000cwa.googlegroups.com>
References: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
	<1162474966.333979.31610@i42g2000cwa.googlegroups.com>
Message-ID: <1162475367.820769.169600@h54g2000cwb.googlegroups.com>


Ant wrote:
> tleeuwenburg at gmail.com wrote:
> ...
> > We'd love it if you could have a look at our first issue, and let us
> > know what you think!
>
> On the layout of the site:
>
[snip..]
> 4) It would be nice to have an HTML view of these PDFs to save the
> irritation of waiting for the document to download and the PDF Reader
> from starting up.
>
> I realise that many of these issues could be limitations of the
> cgpublisher website, but those are my gripes with the site in any case.
>

+1 for HTML content if this is intended to be a free journal.

Fuzzyman
http://www.voidspace.org.uk



From jorge.vargas at gmail.com  Fri Nov 10 09:49:56 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 10 Nov 2006 10:49:56 -0400
Subject: how is python not the same as java?
In-Reply-To: <1163124577.908610.122310@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
Message-ID: <32822fe60611100649o6c567e09xd78fdfb65486ff6f@mail.gmail.com>

On 9 Nov 2006 18:09:37 -0800, John Machin <sjmachin at lexicon.net> wrote:
>
> Jorge Vargas wrote:
> > On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
> > > both are interpreted oo langauges......
> > >
> > that is not correct java is compiled and the VM interprets the code
>
> ... and what do you think is in those pesky little .pyc files you may
> have noticed lying around on your hard disk?
>
can you open a commandline and start writting java code? no

the division between java (runtime) and javac is very explicit, the
compiler catches a lot of things, in python this is threaded in a
totally different way.

the pyc files are just a "catching" system for the common python
developer, as for the java developer the .class files are executable
code. In python noone runs the pyc files, the interpreter takes care
of this for you.

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


From python.sam at googlemail.com  Thu Nov 16 19:02:14 2006
From: python.sam at googlemail.com (sam)
Date: 16 Nov 2006 16:02:14 -0800
Subject: accessing fortran modules from python
In-Reply-To: <mailman.288.1163712993.32031.python-list@python.org>
References: <1163696370.036741.274000@b28g2000cwb.googlegroups.com>
	<mailman.288.1163712993.32031.python-list@python.org>
Message-ID: <1163721734.585813.61250@f16g2000cwb.googlegroups.com>

thanks guys,

i'll follow this up more in a couple of weeks when i know what i need
to do better.

sam



From cyberco at gmail.com  Tue Nov 21 16:11:38 2006
From: cyberco at gmail.com (cyberco)
Date: 21 Nov 2006 13:11:38 -0800
Subject: How good is CORBA?
In-Reply-To: <mailman.544.1164134192.32031.python-list@python.org>
References: <mailman.544.1164134192.32031.python-list@python.org>
Message-ID: <1164143498.154844.288140@h48g2000cwc.googlegroups.com>

Check out Jini. It's being proposed as an Apache project nowadays and
really shines when it comes to making distributed services work
together. Each application can be exposed as a Jini service whereby
other services only know the Java interface the service proxy
implements. How you implement the service itself (python?) or the
communication between the proxy and the service back-end (XML-RPC? RMI?
FTP? E-mail?) is completely up to you. Jini may look difficult at the
beginning, but distributed systems are inherently difficult. Jini just
makes them clear and forces you to deal with them in the easiest way
possible. In my opinion Jini is one of the best kept secrets of
distributed computing. Read up on the vision behind Jini to get an idea
of mother of all SOA technologies.

2B



From anrnsrisnotreqid at blueyonder.co.uk  Sun Nov  5 16:43:33 2006
From: anrnsrisnotreqid at blueyonder.co.uk (djc)
Date: Sun, 05 Nov 2006 21:43:33 GMT
Subject: simple way to un-nest (flatten?) list
Message-ID: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>

There is I am sure an easy way to do this, but I seem to be brain dead 
tonight. So:

I have a table such that I can do

  [line for line  in table if line[7]=='JDOC']
and
  [line for line  in table if line[7]=='Aslib']
and
  [line for line  in table if line[7]=='ASLIB']
etc

I also have a dictionary
  r=  {'a':('ASLIB','Aslib'),'j':('JDOC', 'jdoc')}
so I can extract values
r.values()
[('ASLIB', 'Aslib'), ('JDOC', 'jdoc')]

I would like to do

[line for line  in table if line[7] in ('JDOC','jdoc','Aslib','ASLIB')]

so how should I get from
{'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
to
('Aslib','ASLIB','JDOC','jdoc')



-- 
djc


From orsenthil at gmail.com  Thu Nov 30 13:42:04 2006
From: orsenthil at gmail.com (Phoe6)
Date: 30 Nov 2006 10:42:04 -0800
Subject: Trying to understand rfc822.Message() behaviour
In-Reply-To: <mailman.889.1164911608.32031.python-list@python.org>
References: <1164910937.624693.315950@l12g2000cwl.googlegroups.com>
	<mailman.889.1164911608.32031.python-list@python.org>
Message-ID: <1164912124.337546.307970@f1g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
> Phoe6 wrote:
>
> > Have  a look at this snippet, I have a file direct.txt and I want to
> > read it as rfc8222.Message() so that I get the Subject: and Mood: as
> > Dict Keys and content separately, but I am unable to get the Content
> > Properly.
>
> because the rfc822.Message parser only reads the header; to read the
> rest, just call "read" on the file object after you've parsed the header.
>
> see
>
>      http://effbot.org/librarybook/rfc822.htm
>


Thank you. That helped me best to understand the rfc822 module.

Thanks,
Senthil



From juliajensen888 at yahoo.com  Tue Nov 14 16:55:12 2006
From: juliajensen888 at yahoo.com (julia999)
Date: 14 Nov 2006 13:55:12 -0800
Subject: MAKE MONEY!!!  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
Message-ID: <1163541312.356590.216750@e3g2000cwe.googlegroups.com>

MAKE MONEY!!!

MAKE THOUSANDS!!!

WELL GUESS WHAT!!!


Within seven days, I started getting money in the mail!! I
was shocked!! I figured it would end soon, but the money just kept
coming in. In my first week, I made about $25.00. By the end of the
second
week I had
made a total of more than $1000.00!! In the third week I had more than
$10,000.00 and it's still growing!! This is now my fourth week and I
have
made a total of $42,000.00 and it's still coming rapidly. It's
certainly
worth $6.00 and six stamps, and I have spent more than that on the
lottery
without ever winning!!!


My fingers are sore from opening all the envelopes & I are
on first name basis with our local post office. (i bet they are now
doin it
too!!)

Let me tell you how this works and most important, why it
works..........
also make sure you print this out NOW, so you can get the information
off
of it, as you will need it. I promise you that if you follow the
directions
exactly that you
will start making more money than you thought possible by doing
something
so easy!!


Suggestion: Read this entire message carefully!! (Print it out or
download
it)

Follow the simple directions and watch the money come in!! It's easy.
It's legal. And, your investment is only $6.00 (Plus postage) !!!

You can use any currancy as people can always change it..

IMPORTANT:

This is not a rip-off, it is decent; it's legal; and it is virtually no

risk - it really works!! If all the following instructions are adhered
to,
you will receive extraordinary dividends.

PLEASE NOTE:

Please follow the directions EXACTLY, and $50,000 or more can be yours
in 20 to 60 days. This program remains successful because of the
honesty
and
integrity of the participants. Please continue its success by carefully

adhering to
the instructions. You will now become apart of the Mail Order business.

You
are in the business of developing Mailing Lists. Many large
corporations
are
happy to pay big bucks for quality lists. However, the money made from
the
mailing lists is secondary to income which is made from people like you

and me asking to be included in that list. Here are the four easy steps

to
success.


STEP ONE:


Get six separate pieces of paper and write the following on
each piece of paper "PLEASE PUT ME ON YOUR MAILING LIST."
Now get 6 U.S. $1.00 bills and place ONE inside of EACH of the six
pieces
of paper so the bill will not be seen through the envelope (to prevent
thievery). Next, place one paper in each of the six envelopes and seal
them.
You now should have six sealed envelopes, each with a piece of paper
stating
the above phrase, your name and address, and a $1.00 bill. What you are

doing is creating a service.


THIS IS ABSOLUTELY LEGAL!!!!!


You are requesting a legitimate service and you are paying for it!!
Like
most of us I was a little skeptical and little worried about the legal
aspects
of it all. So I checked it out with the U.S. Post Office
(1-800-238-5355)
and they
confirmed that it is indeed legal!!

Mail the six envelopes to the following addresses:

1) S. Phillips
77 Manly Drive
Robina, QLD 4226
Australia


2) Chris Pittman
7651 Abigail Glen Dr.
Charlotte, NC 28212
USA


3) D. Larrinaga
609 n. Tweedt #203
Kennewick, WA 99336
USA

4) Moris Balli
Kashani street 3/b 40
Tel-Aviv 69499
ISRAEL

5) J.L. Herzfeld
P.O. box 26099
Saint Lewis, MO 63136-0099


6) Clay Pressley
P.O. Box 1041
Baileyville, Me. 04694

STEP TWO:Now take the #1 name off the list that you see above, move the

other names up (six becomes 5, 5 becomes 4, and etc.) and add YOUR NAME

as
number 6 on the list.


STEP THREE:

Change anything you need to but try to keep this article as close to
original as possible. Now post your amended article to at least 200
news
groups. :

(I think there are close to 24,000 groups) All you need is 200, but
remember, the more you post, the more money you make!! This is
perfectly
legal!! If you have any doubts, refer to Title 18 Sec. 1302 & 1341 of
the
Postal Lottery laws. Keep a copy of these steps for yourself and
whenever
you need money, you can use it again, and again. PLEASE REMEMBER that
this
program remains successful because of the honesty and integrity of the
participants and by their carefully adhering to directions. Look at it
this
way. If you were of integrity, the program will continue and the money
that
so many others have received will come your way.

NOTE: You may want to retain every name and address sent to you,>
either on
a computer or hard copy and keep the notes people send you.

This VERIFIES that you are truly providing a service. (Also, it might
be
a good idea to wrap the $1 bill in dark paper to reduce the risk of
mail
theft). So, as each post is downloaded and the directions carefully
followed, all members will be reimbursed for their participation as a
List
Developer with one dollar each. Your name will move up the list
geometrically so that when your name reaches the #1 position you will
be
receiving thousands of dollars in CASH!!! What an opportunity for only
$6.00
( $1.00 for each of the first six people listed above) Send it now, add

your
own name to the list and you're in business!!!

*****DIRECTIONS FOR HOW TO POST TO NEWS GROUPS!!!*****


STEP ONE:

You do not need to re-type this entire letter to do your own
posting. Simply put your cursor at the beginning of this letter and
drag
your
cursor to the bottom of this document, and select 'copy' from the edit
menu. This
will copy the entire letter into the computer's memory.


STEP TWO:

Open a blank 'notepad' file and place your cursor at the top
of the blank page. From the 'edit' menu select 'paste'. This will paste

a
copy
of the letter into the notepad so that you will add your name to the
list.


STEP THREE:

Save your new notepad file as a text file. If you want to do your
posting
in different settings, you'll always have this file to go back to.


STEP FOUR:

You can use a program like "postXpert" to post to all the newsgroups at

once.
You can find this program at <http://www.download.com>.

Use Netscape or Internet Explorer and try searching for various new
groups (on- line forums, message boards, chat sites, discussions.)


STEP FIVE:

Visit message boards and post this article as a new message by
highlighting the text of this letter and selecting paste from the edit
menu.
Fill in the subject, this will be the header that everyone sees as they

scroll through the list of postings in a particular group, click the
post
message button. You're done.


Congratulations!!!!!!


THAT'S IT!! All you have to do, and It Really works!!!

 
BEST WISHES ...



From jfigueiras at sapo.pt  Sat Nov 25 08:38:33 2006
From: jfigueiras at sapo.pt (jfigueiras at sapo.pt)
Date: Sat, 25 Nov 2006 13:38:33 +0000
Subject: Capture file descriptors while running an external program
Message-ID: <1164461913.45s5xaodc30g@w3.mail.sapo.pt>

>I have a problem with the module subprocess!
>The problem is that the external software that I am running under
>subprocess.Popen opens stdin, stdout, stderr, and other file descriptors to
>write and read in the hard drive.

As many other programs...

>I know how to capture stdin, stdout and stderr, what I cannot do is to capture
>the other file-descriptors. Is there any way to wrap those non-standard file
>descriptors and make them write and read from a specific object that I define?
>I know that I can use tmp files to do that, but i would like something running
>without tmp files.

I'm not sure what you mean by "non-standard file descriptors". The
other program is free to open, read, write, etc any file he wants -
are you trying to trap any file operation it may want to do?
You *could* do such things -google for "code injection" and "API
hooking"- but I doubt it's what you really want.

--
Gabriel Genellina
Softlab SRL

Hi Gabriel!

When I wrote "non-standard file descriptors", I meant the file descriptior which
are pointed to files in the hardrive.
What I would like to do is not to trap any file operation, but instead intercept
that file operation, i.e. I would like the output of the external program to
don't be writen in a file (its normal behavior), but instead be sent to any
variable in my program.
I know the name of the file where the external program will write the output. I
pass its name along the command line.

Joao Figueiras

___________________________________________________________________

O SAPO j? est? livre de v?rus com a Panda Software, fique voc? tamb?m!
Clique em: http://antivirus.sapo.pt



From fredrik at pythonware.com  Fri Nov 17 02:37:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 08:37:19 +0100
Subject: problem with defining a global class instance
In-Reply-To: <f01c4d9e0611162322o7d65b544q626b4a70c9186b23@mail.gmail.com>
References: <f01c4d9e0611162322o7d65b544q626b4a70c9186b23@mail.gmail.com>
Message-ID: <ejjorg$vfa$1@sea.gmane.org>

sharath B N wrote:

> def generate (... ,....,...)
> 
> " in this function i define the global variables "
> global  stock,stockManager, manager etc.
> 
> 
> class Manager
> ...
> ...
> ...
> def  create_stockManager(..)
> """ this is a method in class manager"""
> stockManager = StockManager( name)
> stockManager.create_Stock(..)
> 
> now this gives an attribute error sayin .... stockManager has no
> attribute create_Stock

so where is it?

</F>



From phd at phd.pp.ru  Sat Nov 18 14:52:35 2006
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sat, 18 Nov 2006 22:52:35 +0300
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118192248.GB29614@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
	<20061118192248.GB29614@58sirius016.dc.ukrtel.net>
Message-ID: <20061118195235.GA22453@phd.pp.ru>

On Sat, Nov 18, 2006 at 09:22:48PM +0200, Kirill Simonov wrote:
> On Sat, Nov 18, 2006 at 10:08:22PM +0300, Oleg Broytmann wrote:
> > On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
> > > Could anyone suggest me a simple IDE suitable for teaching Python as a
> > > first programming language to high school students?
> > 
> >    Does it have to be an IDE? Wouldn't it be better to use a simple text
> > editor + command line?
> 
> Preferably.  I believe that using a editor + command line will only make
> things worse because console and GUI have different encodings under
> Windows.

   Ouch! I am always forgetting about it, 'cause I seldom use Windows, and
even in Windows my editor is gvim. (-:

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From sjmachin at lexicon.net  Sun Nov 19 01:44:58 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 22:44:58 -0800
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<1163917049.387309.150740@e3g2000cwe.googlegroups.com>
Message-ID: <1163918698.063535.209970@k70g2000cwa.googlegroups.com>

nateastle at gmail.com wrote:
> So I implemented the exception spcified and in testing it returns:
>
> DeprecationWarning: raising a string exception is deprecated
>
> I am not to worried about depreciation warning however, out of
> curiosity, what would the better way be to handle this? Is there a way
> that (web site, help documentation, etc...) I would be able to find
> this? I am running this in Python 2.5

Just try shortening the statement to the bare:
   raise

For example:

| >>> try:
| ...    f = open("nonesuch.txt")
| ... except IOError:
| ...    raise
| ...
| Traceback (most recent call last):
|   File "<stdin>", line 2, in <module>
# Coming from a file you'll get filename, linenumber, function/method
above
| IOError: [Errno 2] No such file or directory: 'nonesuch.txt'
| >>>

If you feel that the error message that you get is descriptive enough,
even better than what you'd contemplated writing yourself, you're done.
Otherwise you need to raise an instance of the Exception class, and the
degree of difficulty just went up a notch.

[Aside] How are you going to explain all this to your instructor, who
may be reading all this right now?

Cheers,
John

>
> Diez B. Roggisch wrote:
> > nateastle at gmail.com schrieb:
> > > I have taken the coments and think I have implemented most. My only
> >
> > Unfortunately, no.
> >
> > > question is how to use the enumerator. Here is what I did, I have tried
> > > a couple of things but was unable to figure out how to get the line
> > > number.
> > >
> > > def Xref(filename):
> > >     try:
> > >         fp = open(filename, "r")
> > >     except:
> > >         raise "Couldn't read input file \"%s\"" % filename
> >
> > You still got that I-catch-all-except in there.
> > This will produce subtle bugs when you e.g. misspell a variable name:
> >
> > filename = '/tmp/foo'
> > try:
> >     f = open(fliename, 'r')
> > except:
> >     raise "can't open filename"
> >
> >
> > Please notice the wrong-spelled 'fliename'.
> >
> > This OTOH will give you more clues on what really goes wrong:
> >
> >
> >
> > filename = '/tmp/foo'
> > try:
> >     f = open(fliename, 'r')
> > except IOError:
> >     raise "can't open filename"
> > 
> > 
> > Diez



From chad.schroeder at lodgenet.com  Wed Nov 15 18:15:03 2006
From: chad.schroeder at lodgenet.com (Chad J. Schroeder)
Date: Wed, 15 Nov 2006 17:15:03 -0600
Subject: Threads and signals
Message-ID: <pJ-dnYyz7q_sAsbYnZ2dnUVZ_sidnZ2d@midco.net>

I've run into an "opportunity" in a Python application using threads and 
signals.
Basically, there is a main process that spawns off a child thread that loops 
forever.
In between iterations, the child thread sleeps for X seconds. All the while, the 
main
thread loops forever doing its thing and also sleeps in between iterations (see 
the code
at the end this message). Normally the application would be daemonized before 
the main
process starts up. Hence, during a system shutdown or stoppage of the daemon, 
it's
desired that the daemon catch a few signals (TERM/INT) and perform a few cleanup
routines. According to the Python docs, only the main thread will receive 
signals. The
problem I have, on FreeBSD systems, is that the sleep function in the child gets 
interrupted
and the signal never gets handled until the main thread's sleep concludes. It 
works as
expected on a Linux box (main thrd's sleep is interrupted). Sample output from 
multiple
systems is directly below.

Just looking for insight from others in the know.

Thanks,
Chad


Linux 2.6.17
------------------------------------------------------------------------
test_bed$ python2.5 ./thrd_test.py
Starting up
MainThread.run(): 14332
MainThread before sleep(15)
ChildThread.run(): 14332
ChildThread before sleep(10)
Received signal 2                    <-- Interrupted here (Ctrl-C), correctly
flag: True                                    interrupts sleep in main thread
flag: False
MainThread after sleep(15)
Shutting down

test_bed$ python2.4 ./thrd_test.py
Starting up
MainThread.run(): 14338
MainThread before sleep(15)
ChildThread.run(): 14338
ChildThread before sleep(10)
Received signal 2                     <-- Interrupted here (Ctrl-C), correctly
flag: True                                    interrupts sleep in main thread
flag: False
MainThread after sleep(15)
Shutting down
test_bed$

FreeBSD 4.11, 6.1, and 6.2
------------------------------------------------------------------------
bash-2.05b# python2.5 ./thrd_test.py
Starting up
MainThread.run(): 65930
ChildThread.run(): 65930
ChildThread before sleep(10)
MainThread before sleep(15)
^CChildThread after sleep(10)          <-- Interrupted here (Ctrl-C), but
ChildThread before sleep(10)                 interrupts the child thrd's sleep
ChildThread after sleep(10)
ChildThread before sleep(10)
Received signal 2                            <-- Main sleep concludes and then 
the
flag: True                                           signal gets handled
flag: False
MainThread after sleep(15)
Shutting down
bash-2.05b#


#--- CODE BEGIN ---#

#!/usr/bin/env python

import os
import sys
import time
import signal
import threading

def sigHandle(signo, stkframe):
    print "Received signal ", signo
    print "flag: ", mthrd.flag.isSet()
    mthrd.flag.clear()
    print "flag: ", mthrd.flag.isSet()

class ChildThread(threading.Thread):

    def __init__(self):
        threading.Thread.__init__(self)

    def run(self):
        print "ChildThread.run(): ", os.getpid()
        while (True):
            print "ChildThread before sleep(10)"
            time.sleep(10)
            print "ChildThread after sleep(10)"

class MainThread(object):

    def __init__(self):
        self.flag = threading.Event()
        self.cthrd = ChildThread()
        self.cthrd.setDaemon(True)

    def run(self):
        print "MainThread.run(): ", os.getpid()
        self.flag.wait()
        self.cthrd.start()
        while (self.flag.isSet()):
            print "MainThread before sleep(15)"
            time.sleep(15)
            print "MainThread after sleep(15)"
        return    # or cleanup routine

if __name__ == "__main__":

    # Normally, the process is daemonized first. That's been
    # left out for testing purposes.

    signal.signal(signal.SIGINT, sigHandle)
    signal.signal(signal.SIGQUIT, sigHandle)
    signal.signal(signal.SIGTERM, sigHandle)

    mthrd = MainThread()
    print "Starting up"
    mthrd.flag.set()
    mthrd.run()
    print "Shutting down"

    sys.exit(0)

#--- CODE END ---# 



From fredrik at pythonware.com  Fri Nov 24 01:39:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 07:39:16 +0100
Subject: Access to variable from external imported module
In-Reply-To: <1164325016.139659.271500@l12g2000cwl.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>	<mailman.656.1164317994.32031.python-list@python.org>	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>	<ek57lv$5cd$1@news.albasani.net>
	<1164325016.139659.271500@l12g2000cwl.googlegroups.com>
Message-ID: <ek642l$v3u$1@sea.gmane.org>

GinTon wrote:

> Thanks Robert, the best solution is get all local variables, else is
> impossible access to them.

if you don't want them to be local, why are you using local variables?

(have you read the Python tutorial?)

</F>



From tuomas.vesterinen at pp.inet.fi  Wed Nov 22 17:49:56 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 22 Nov 2006 22:49:56 GMT
Subject: interleaving dictionary values
In-Reply-To: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
References: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
Message-ID: <ou49h.403$4J5.297@read3.inet.fi>

j1o1h1n at gmail.com wrote:
> Hello,
> 
> I was trying to create a flattened list of dictionary values where each
> value is a list, and I was hoping to do this in some neat functionally
> style, in some brief, throwaway line so that it would assume the
> insignificance that it deserves in the grand scheme of my program.
> 
> I had in mind something like this:
> 
> 
>>>>interleave([1, 2, 3], [4,5], [7, 8, 9])
> 
> [1, 4, 7, 2, 5, 8, 3, 9]
> 
> I played for a while with zip(), [some newfangled python keyword, that
> I was truly shocked to find has been hiding at the bottom of the list
> built in functions since version 2.0], before giving up and going back
> to trusty old map(), long celebrated for making code hard to read:
> 
> 
>>>>map(None, [1, 2, 3], [4,5], [7, 8, 9])
> 
> [(1, 4, 7), (2, 5, 8), (3, None, 9)]
> 
> This is basically it.  It then becomes:
> 
> 
>>>>filter(None, flatten(map(None, [1, 2, 3], [4,5], [7, 8, 9])))
> 
> [1, 4, 7, 2, 5, 8, 3, 9]
> 
> filter(None, - my brain parses that automatically now.  This is not so
> bad.  Flatten is snitched from ASPN/Cookbook/Python/Recipe/363051,
> thank you Jordan Callicoat, Mike C. Fletcher:
> 
> def flatten(l, ltypes=(list, tuple)):
>     i = 0
>     while (i < len(l)):
>        while (isinstance(l[i], ltypes)):
>            l[i:i+1] = list(l[i])
>        i += 1
>     return l
> 
> Trouble is then getting map() to play with the result of dict.values().
>  I only worked this out while writing this post, of course.
> 
> Given a dictionary like d = { "a" : [1, 2, 3], "b" : [4, 5], "c" : [7,
> 8, 9]} - I was hoping to do this:
> 
>   map(None, d.values())
> 
> But instead I (finally worked out I could) do this:
> 
>   apply(map, tuple([None] + d.values()))
> 
> So... my bit of code becomes:
> 
>   filter(None, flatten(map(None, apply(map, tuple([None] +
> d.values())))))
> 
> It fits on one line, but it feels far more evil than I set out to be.
> The brackets at the end are bad for my epilepsy.
> 
> Surely there is there some nice builtin function I have missed?
> 
> --
> | John J. Lehmann, j1o1h1n(@)gmail.com
> + [lost-in-translation] "People using public transport look stern, and
> handbag
> + snatchers increase the ill feeling."  A  Japanese woman, Junko, told
> the paper:
> + "For us, Paris is the dream city. The  French are all beautiful and
> elegant
> + And then, when we arrive..."
> 

What about:
 >>> d = { "a" : [1, 2, 3], "b" : [4, 5], "c" : [7, 8, 9]}
 >>> L=[]
 >>> for x in d.values(): L.extend(x)
...
 >>> L
[1, 2, 3, 7, 8, 9, 4, 5]

or a little curious:
 >>> L=[]
 >>> map(L.extend, d.values())
[None, None, None]
 >>> L
[1, 2, 3, 7, 8, 9, 4, 5]

TV



From steve at REMOVEME.cybersource.com.au  Tue Nov 21 23:09:43 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 22 Nov 2006 15:09:43 +1100
Subject: Note about getattr and '.'
References: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
	<45637197$0$12642$3b214f66@tunews.univie.ac.at>
Message-ID: <pan.2006.11.22.04.09.40.990455@REMOVEME.cybersource.com.au>

On Tue, 21 Nov 2006 22:39:09 +0100, Mathias Panzenboeck wrote:

> szport at gmail.com wrote:
>> There is an interesting skewness in python:
>> 
>> class A(object): pass
>> 
>>>>> a=A()
>>>>> setattr(a, '$foo', 17)
>>>>> getattr(a, '$foo')
>> 17
>> 
>> But I can't write 
>>>>> a.'$foo'
>> 
> 
> Yes, this is known. I think IronPython uses a specialized dictionary for members, which prohibits 
> malformed names. I don't know if there will be such a dictionary in any future CPython version. 
> (Would be good.)


Why would it be good?

How many bugs have you found that were caused by this behaviour?



-- 
Steven D'Aprano 



From erokar at gmail.com  Tue Nov 14 14:26:19 2006
From: erokar at gmail.com (erokar at gmail.com)
Date: 14 Nov 2006 11:26:19 -0800
Subject: How to check for instances of a class
References: <1163530852.868370.104780@h54g2000cwb.googlegroups.com>
	<20061114200612.5c8e4874@localhost>
Message-ID: <1163532378.891520.278990@b28g2000cwb.googlegroups.com>


That did the trick, thank you!



From craigtw.online at gmail.com  Tue Nov 28 19:07:25 2006
From: craigtw.online at gmail.com (Craig)
Date: 28 Nov 2006 16:07:25 -0800
Subject: ElementTree xmlns:xsi question
Message-ID: <1164758845.711068.194520@h54g2000cwb.googlegroups.com>

Hi there,

I'm generating an XML script using ElementTree which has the following
attributes in the root element:

<CANmessages xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="code/can.xsd">

My python script I have written is:

root = Element("CANmessages",
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance",
xsi:noNamespaceSchemaLocation="code/can.xsd")

Obviously there is a syntax error inregard to the colons in the
attribute names.  I have to have the xsi attributes in there otherwise
the XML won't work correctly.  What can I do to make the code correct
and the output being 100% correct as well.  Any help would be greatly
appreciated.

Craig



From ask at me  Thu Nov  2 07:46:28 2006
From: ask at me (alf)
Date: Thu, 02 Nov 2006 06:46:28 -0600
Subject: Python images processing -recap
In-Reply-To: <mailman.1643.1162450511.11739.python-list@python.org>
References: <SYOdnf4nBKSu59TYnZ2dnUVZ_qSdnZ2d@comcast.com>
	<mailman.1643.1162450511.11739.python-list@python.org>
Message-ID: <4549E8A4.6080703@me>

Fredrik Lundh wrote:
> alf wrote:
> 
>> Are all supported, which is most mature, in which I could perform for 
>> instance 'Ken Burns effect' 
> 
> 
> that's a display effect, not an image effect.  you need a display (or 
> animation) library for that.
> 

In fact I want to generate a sequence of BMPs and feed mpeg decoder with it.

A.


From steve at holdenweb.com  Thu Nov  9 22:43:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 21:43:08 -0600
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <ej0se4$jt9$1@sea.gmane.org>

gavino wrote:
> both are interpreted oo langauges......
> 
Java is horrible, Oython is not.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From sjmachin at lexicon.net  Sat Nov 25 18:22:06 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 15:22:06 -0800
Subject: a -very- case sensitive search
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<pan.2006.11.25.23.16.02.49327@REMOVE.THIS.cybersource.com.au>
	<1164496191.432923.37480@45g2000cws.googlegroups.com>
Message-ID: <1164496926.182484.241510@h54g2000cwb.googlegroups.com>

Dustan wrote:
> Steven D'Aprano wrote:
> > On Sat, 25 Nov 2006 13:39:55 -0800, Ola K wrote:
> >
> > > Hi,
> > > I am pretty new to Python and I want to make a script that will search
> > > for the following options:
> > > 1) words made of uppercase characters -only- (like "YES")
> > > 2) words made of lowercase character -only- (like "yes")
> > > 3) and words with only the first letter capitalized (like "Yes")
> > > * and I need to do all these considering the fact that not all letters
> > > are indeed English letters.
> > >
> > > I went through different documention section but couldn't find a right
> > > condition, function or method for it.
> >
> > At the command prompt:
> >
> >
> > >>> dir('')
> > # result edited for clarity
> > [ ... 'isalnum', 'isalpha', 'isdigit', 'islower',
> > 'isspace', 'istitle', 'isupper',  ... ]
> >
> > Then do this:
> >
> > >>> help(''.islower)
> >
> > and read the text it provides. Then experiment on the command line:
> >
> > >>> 'abcd1234'.islower()
> > True
> > >>> 'aBcd1234'.islower()
> > False
>
> Forget what I said; I didn't know about the str.is* methods.

... or about the unicode.is* [same bunch of] methods, which may
possibly address the OP's
"not all letters are indeed English letters" concerns. If he's stuck
with 8-bit str objects, he may need to ensure the locale is set
properly, as vaguely hinted at in the docs that Steven pointed him to.

Cheers,
John



From wo_shi_big_stomach at mac.com  Thu Nov 23 10:21:45 2006
From: wo_shi_big_stomach at mac.com (wo_shi_big_stomach)
Date: Thu, 23 Nov 2006 07:21:45 -0800
Subject: combining the path and fileinput modules
In-Reply-To: <1164291336.523872.131610@h54g2000cwb.googlegroups.com>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
Message-ID: <4565BC89.9060901@mac.com>

On 11/23/06 6:15 AM, Rob Wolfe wrote:
> wo_shi_big_stomach wrote:
>> Newbie to python writing a script to recurse a directory tree and delete
>> the first line of a file if it contains a given string. I get the same
>> error on a Mac running OS X 10.4.8 and FreeBSD 6.1.
>>
>> Here's the script:
>>
>> # start of program
>>
>> # p.pl - fix broken SMTP headers in email files
>> #
>> # recurses from dir and searches all subdirs
>> # for each file, evaluates whether 1st line starts with "From "
>> # for each match, program deletes line
>>
>> import fileinput
>> import os
>> import re
>> import string
>> import sys
>> from path import path
>>
>> # recurse dirs
>> dir = path(/home/wsbs/Maildir)
>> for f in dir.walkfiles('*'):
>>  	#
>> 	# test:
>> 	# print f
> 
> Are you absolutely sure that f list doesn't contain
> any path to directory, not file?
> Add this:
> 
>         f = filter(os.path.isfile, f)
> 
> and try one more time.

Sorry, no joy. Printing f then produces:

rppp
rppppp
rppppp
rpppr
rppppp
rpppP
rppppp
rppppp

which I assure you are not the filenames in this directory.

I've tried this with f and f.name. The former prints the full pathname
and filename; the latter prints just the filename. But neither works
with the fileinput.input() call below.

I get the same error with the filtered mod as before:

  File "./p", line 23, in ?
    for line in fileinput.input(f, inplace=1, backup='.bak'):

Thanks again for info on what to feed fileinput.input()



> 
>> 	#
>> 	# open file, search, change if necessary, write backup
>>  	for line in fileinput.input(f, inplace=1, backup='.bak'):
>> 		# check first line only
>> 		if fileinput.isfirstline():
>>  			if not re.search('^From ',line):
>>  				print line.rstrip('\n')
>>  		# just print all other lines
>>  		if not fileinput.isfirstline():
>>  			print line.rstrip('\n')
>>  	fileinput.close()
>> # end of program
> 



From gagsl-py at yahoo.com.ar  Wed Nov 15 18:25:59 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 20:25:59 -0300
Subject: wrapping existing instance in new interface
In-Reply-To: <1163629801.712734.142370@h54g2000cwb.googlegroups.com>
References: <1163629801.712734.142370@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061115194905.0408df68@yahoo.com.ar>

At Wednesday 15/11/2006 19:30, insyte at gmail.com wrote:

>I am writing a class that subclasses datetime.datetime in order to add
>a few specialized methods.  So far the __init__ looks like this:
>
>class myDateTime(datetime.datetime):
>     def __init__(self, time, *args, **kwargs):
>         if isinstance(time, str):
>             timeTuple, tzOffset = self.magicMethod(timeStr)
>             datetime.__init__(self, tzinfo=GenericTZ(tzoffset),
>**timeTuple)

(I assume you mean *timeTuple)

>I would also like to pass in instances of datetime.datetime and have my
>class wrap it in the new interface.  Something like this:
>
>mdt = myDateTime(datetime.datetime.now())
>
>I suppose I could do something like this:
>
>     elif isinstance(time, datetime.datetime):
>         timetuple = time.timetuple()
>         tzoffset = time.utcoffset()
>         datetime.__init__(self, tzinfo=GenericTZ(tzoffset),
>**timetuple)
>
>However, that feels rather... awkward.  Is there a better/cleaner way?
>Perhaps a way to directly wrap my new interface around the passed-in
>datetime.datetime instance?

I don't see any other suitable constructor for datetime; perhaps one 
taking a datetime instance would be useful here.
Each individual component (year, month, etc.) is stored by itself, so 
timetuple() isn't complex; apart from the overhead of constructing a 
new object, you get an unneeded extra check of validity.

Another way would be monkey-patching the datetime class adding your 
own methods. This way the new methods would be available on any 
datetime instance - you don't need myDateTime class.
You can move "magicmethod" into a factory function used to construct 
datetime objects.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From apardon at forel.vub.ac.be  Wed Nov 15 05:53:21 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Nov 2006 10:53:21 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
	<pan.2006.11.15.07.12.31.716203@REMOVEME.cybersource.com.au>
	<slrnelljim.r7i.apardon@rcpc42.vub.ac.be>
	<pan.2006.11.15.10.35.41.68874@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnellsd1.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-15, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Wed, 15 Nov 2006 08:22:46 +0000, Antoon Pardon wrote:
>
>>> Redundancy is not something to be valued for its own sake. It is only
>>> valuable when it actually gains you something.
>> 
>> In the same way it is not something to be eliminated for its own
>> sake.
>
> On the contrary, redundancy implies more work somewhere: e.g. more work
> for the parser, more effort needed by the python-dev crew, bigger
> binaries, larger code bases, more complex test suites, slower development,
> longer downloads. Whatever the nature of the redundant thing, there will
> be a cost to it. If that cost isn't outweighed by some advantage it should
> be eliminated merely because it is redundant and therefore a cost we could
> do without.

It you want to put it in those terms fine. It doesn't change the fact
that when someone doesn't like some proposal that happens to introduce
redundancy here in c.l.p, there is a reasonable chance that the proposal
will be dismissed with the simple observation that it introduces redundancy
without further reference to possible costs or benefits of the specific
redundancy.

IME there is a lot of redundancy that has benefits. So there is no
reason to dismiss a proposal simply on the grounds that it introduces
some redundancy. Something that seems to happen a lot here.

-- 
Antoon Pardon


From p.lavarre at ieee.org  Thu Nov  9 19:58:20 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 16:58:20 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
	<1163115840.190634.5800@m73g2000cwd.googlegroups.com>
Message-ID: <1163120300.092721.96830@f16g2000cwb.googlegroups.com>

> "struct" == "Python struct module"
>
> Struct module has (concise) codes B, H, I, Q for unsigned integers of
> lengths 1, 2, 4, 8, but does *not* have a code for 3-byte integers.

I thought that's what the manual meant, but I was unsure, thank you.

> > > 1. Not as concisely as a one-byte struct code
>
> Looks like you ignored the first word in the sentence ("Not").

I agree I have no confident idea of what your English meant.

I guess you're hinting at the solution you think I should find obvious,
without volunteering what that is.

Yes?  If so, then:

I guess for you "a one-byte struct code" is a 'B' provided as a "format
character" of the fmt parameter of the struct.pack function.

Yes?  if so, then:

You recommend shattering the three byte int:

skip = 0x012345 ; count = 0x80
struct.pack('>6B', 0x08, skip >> 0x10, skip >> 8, skip, count, 0)

Except you know that chokes over:

DeprecationWarning: 'B' format requires 0 <= number <= 255

So actually you recommend:

def lossypack(fmt, *args):
        return struct.pack(fmt, *[(arg & 0xFF) for arg in args])
skip = 0x012345 ; count = 0x80
lossypack('>6B', 0x08, skip >> 0x10, skip >> 8, skip, count, 0)

Yes?

> > I guess you're asking me ...
> > to show more plainly that indeed I am trying
> > to make sense of every word of every answer

Am I helping?



From rrs at researchut.com  Wed Nov 29 08:19:44 2006
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: 29 Nov 2006 05:19:44 -0800
Subject: screen output problem
In-Reply-To: <xjUah.4142$ql2.3199@newsread3.news.pas.earthlink.net>
References: <1164497246.626735.254050@h54g2000cwb.googlegroups.com>
	<76fd5acf0611252337v2522a518jf8f92d241906d84@mail.gmail.com>
	<mailman.792.1164707575.32031.python-list@python.org>
	<xjUah.4142$ql2.3199@newsread3.news.pas.earthlink.net>
Message-ID: <1164806384.458678.151540@l39g2000cwd.googlegroups.com>

I'm not sure if there is a definite solution to this problem.

I've noticed that one of the applications, which I use on a daily basis
(apt from Debian) does address the progress bar issue in another way.

When apt tries to download multiple files, it displays the progress of
all the downloads on a single line. Probably the apt developers also
might have run into the same issue and hence settled down with this
workaround.


Thanks,
Ritesh


Dennis Lee Bieber wrote:
> On Tue, 28 Nov 2006 15:15:28 +0530, Ritesh Raj Sarraf
> <rrs at researchut.com> declaimed the following in comp.lang.python:
>
>
> > If there's a way to print multiple lines of text withouth the newline ("\n")
> > character, we can then use carriage return ("\r") and implement a proper
> > progressbar with a bar for each separate progress action.
> >
> 	If you were running on an Amiga, or via a serial port connection to
> an old VT-100 terminal, it would be child's play... Since both
> understood the same terminal control codes for moving the cursor around
> a text display.
>
> 	The old MS-DOS "ANSI" console driver may have understood that set.
> But M$, in its great and all-powerful wisdom, seems to feel that the
> only need for a command line interface is for batch configuration
> scripts that run with no human interaction, and hence with no need for
> status. One is expected to code a GUI instead if such things as
> progress-bars are needed.
>
> 	A google for "windows console cursor control" brings up (a bit of a
> surprise since I my search terms didn't mention Python):
>
> http://newcenturycomputers.net/projects/wconio.html
>
> Of course, this isn't portable to LINUX or other operating systems...
>
> 	Also, looking at win32api, I find a SetCursorPos() (and matching
> get...).
>
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/



From bla at bla.com  Thu Nov 30 10:08:03 2006
From: bla at bla.com (Vincent Delporte)
Date: Thu, 30 Nov 2006 16:08:03 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
	<7nqtm25fq8vk4jlu577n974hgei3ese3g7@4ax.com>
	<hnrtm25a9s72a6bacjocreq4md14sr4qar@4ax.com>
Message-ID: <gtstm25j0p49ufj858nt4j902nhpqqlfl8@4ax.com>

On Thu, 30 Nov 2006 15:48:53 +0100, Vincent Delporte <bla at bla.com>
wrote:
>    -- Launched AGI Script /var/lib/asterisk/agi-bin/ncid.python.agi
>Failed to execute '/var/lib/asterisk/agi-bin/ncid.python.agi': Exec
>format error

Stupid me :-/ Forgot the all-important

#!/usr/bin/python

Sorry for the disturbance..


From XX.XmcX at XX.XmclaveauX.com  Sat Nov  4 00:51:38 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Sat, 04 Nov 2006 06:51:38 +0100
Subject: how do I pass values between classes?
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
Message-ID: <mn.219b7d6b647495a1.46195@XX.XmclaveauX.com>

Hi!

Look Candygram (http://candygram.sourceforge.net/)
Candygram has features who will fun for you (like 
inter-threads-comunication).

-- 
@-salutations

Michel Claveau




From tleeuwenburg at gmail.com  Wed Nov 29 00:35:03 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 28 Nov 2006 21:35:03 -0800
Subject: Python program that validates an url against w3c markup validator
In-Reply-To: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
Message-ID: <1164778503.258238.275890@14g2000cws.googlegroups.com>

urls = [("/tmp/validate1.html", "http://www.theage.com.au")]

for url, outputfile in urls:
   commandString = 'wget -o %s http://validator.w3.org/check?uri=%s' %
(outputfile, url)
   system.exec(commandString)

is one easy way.

yaru22 wrote:
> I'd like to create a program that validates bunch of urls against the
> w3c markup validator (http://validator.w3.org/) and store the result in
> a file.
>
> Since I don't know network programming, I have no idea how to start
> coding this program.
>
> I was looking at the python library and thought urllib or urllib2 may
> be used to make this program work.
>
> But I don't know how to send my urls to the w3c validator and get the
> result.
>
> Can anyone help me with this? or at least give me a hint?
> 
> Thank you so much.



From steve at holdenweb.com  Thu Nov 16 05:37:02 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 10:37:02 +0000
Subject: Decimal() instead of float?
In-Reply-To: <ejg2h0$rpg$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper><mailman.2125.1163295096.11739.python-list@python.org><pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au><1163322853.760315.51040@k70g2000cwa.googlegroups.com>	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
	<ejg2h0$rpg$1@sea.gmane.org>
Message-ID: <ejheu3$lna$1@sea.gmane.org>

Terry Reedy wrote:
> "John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
> news:455b82a0$0$7054$c3e8da3 at news.astraweb.com...
>> John Machin wrote:
>>
>>> Here in Austraila, (I expect this is common to most countries), there
>>> are people who are utterly clueless about elementary data model rules,
>>> like identification "numbers" should be kept as strings.
>> Do you mean that ID numbers that serve as a primary key in a database
>> should also be strings?
> 
> If you mean user-entered data like social security, phone, account, part, 
> or postal code 'numbers' -- as opposed to internal db-generated numbers 
> that the user never sees -- this I would presume 'yes'.
> 
The modern trend is to use such values as alternate keys, and to have 
all tables use an automatically-allocated integer (autoincrement, 
identity, sequence) field as the primary key.

Unfortunately some applications are getting such large tables that a 
32-bit field is insufficient to enumerate all existing and deleted rows. 
Then you have to start keeping tables of unused primary keys.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From cliff at develix.com  Tue Nov  7 17:01:39 2006
From: cliff at develix.com (Cliff Wells)
Date: Tue, 07 Nov 2006 14:01:39 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <01ee01c70235$1672e820$03000080@hendrik>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
	<1162853677.881233.76940@m7g2000cwm.googlegroups.com>
	<1162854065.932910.99240@k70g2000cwa.googlegroups.com>
	<01ee01c70235$1672e820$03000080@hendrik>
Message-ID: <1162936899.3199.17.camel@localhost.localdomain>

On Tue, 2006-11-07 at 08:10 +0200, Hendrik van Rooyen wrote:
> "John Machin" <sjmachin at lexicon.net> wrote:
> 
> 8<---------------------------------------
> 
> > I strongly suggest that you read the docs *FIRST*, and don't "tinker"
> > at all.
> >

>  This is *good* advice - its unlikely to be followed though, as the OP is prolly
> just like most of us - you unpack the stuff out of the box and start assembling
> it, and only towards the end, when it wont fit together, do you read the manual
> to see where you went wrong...

I fall right into this camp(fire).  I'm always amazed and awed at people
who actually read the docs *thoroughly* before starting.  I know some
people do but frankly, unless it's a step-by-step tutorial, I rarely
read the docs beyond getting a basic understanding of what something
does before I start "tinkering".

I've always been a firm believer in the Chinese proverb:

I hear and I forget
I see and I remember
I do and I understand

Of course, I usually just skip straight to the third step and try to
work backwards as needed.  This usually works pretty well but when it
doesn't it fails horribly.  Unfortunately (for me), working from step
one rarely works at all, so that's the boat I'm stuck in.

I've always been a bit miffed at the RTFM crowd (and somewhat jealous, I
admit).  I *do* RTFM, but as often as not the fine manual confuses as
much as clarifies.  I'm not convinced this is the result of poor
documentation so much as that I personally have a different mental
approach to problem-solving than the others who find documentation
universally enlightening.  I also suspect that I'm not alone in my
approach and that the RTFM crowd is more than a little close-minded
about how others might think about and approach solving problems and
understanding concepts. 

Also, much documentation (including the Python docs) tends to be
reference-manual style.  This is great if you *already* understand the
problem and just need details, but does about as much for
*understanding* as a dictionary does for learning a language.  When I'm
perusing the Python reference manual, I usually find that 10 lines of
example code are worth 1000 lines of function descriptions and
cross-references.

Just my $0.02.

Regards,
Cliff




From john106henry at hotmail.com  Thu Nov 30 14:53:57 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 11:53:57 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164916148.930057.280350@f1g2000cwa.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
	<qqGbh.10436$Gk5.6159@tornado.texas.rr.com>
	<1164916148.930057.280350@f1g2000cwa.googlegroups.com>
Message-ID: <1164916437.055932.193130@79g2000cws.googlegroups.com>


John Henry wrote:
> Paul McGuire wrote:
> > "Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message
> > news:MmGbh.10434$Gk5.6762 at tornado.texas.rr.com...
> > > "John Henry" <john106henry at hotmail.com> wrote in message
> > > news:1164913125.509492.54060 at 79g2000cws.googlegroups.com...
> > snip
> >
> > Grrrr... that's what I get for not keeping editor and interpreter windows in
> > sync.  My post was referencing vars I had defined in the interpreter, but
> > which the function had no clue of. !!!  Here's a working version.
> >
> > -- Paul
> >
> >
> > def splitUp(src,lens):
> >     ret = []
> >     cur = 0
> >     for length in lens:
> >         if length is not None:
> >             ret.append( src[cur:cur+length] )
> >             cur += length
> >         else:
> >             ret.append( src[cur:] )
> >     return ret
> >
> > origlist = list("ABCDEFGHIJ")
> > alist, blist, clist, dlist = splitUp( origlist, (1,1,3,None) )
> > print alist, blist, clist, dlist
>
>
> Nice.
>
> While we are at it, why not:
>
> class splitUp(object):
>    def __init__(self,src):
>        self._src=list(src)
>    def slice(self, lens):
>      ret = []
>      cur = 0
>      for length in lens:
>          if length is not None:
>              ret.append( self._src[cur:cur+length] )
>              cur += length
>          else:
>              ret.append( self._src[cur:] )
>      return ret
>
> alist, blist, clist, dlist = splitUp("ABCDEFGHIJ").slice((1,1,3,None))
> print alist, blist, clist, dlist
>
> Now, that's readable!

Further, if splitUp is a sub-class of string, then I can do:

alist, blist, clist, dlist = "ABCDEFGHIJ".slice((1,1,3,None))

Now, can I override the slice operator?



From vinjvinj at gmail.com  Sun Nov  5 13:00:08 2006
From: vinjvinj at gmail.com (vj)
Date: 5 Nov 2006 10:00:08 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <mailman.1783.1162733817.11739.python-list@python.org>
References: <mailman.1783.1162733817.11739.python-list@python.org>
Message-ID: <1162749608.733730.321970@k70g2000cwa.googlegroups.com>

> Riverbank Computing is pleased to announce the release of PyQt v4.1
> available from http://www.riverbankcomputing.co.uk/pyqt/.

What's the best way to learn pyqt. Do the examples from the book GUI
Programming with Python: QT Edition still work? Is the material from
the book mostly valid or have things changed quite a bit?

http://www.commandprompt.com/community/pyqt/

Vineet



From zhangry at feng.co.jp  Tue Nov 28 03:58:35 2006
From: zhangry at feng.co.jp (HYRY)
Date: 28 Nov 2006 00:58:35 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <ekgt97$31p$00$2@news.t-online.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
Message-ID: <1164704315.847955.81950@45g2000cws.googlegroups.com>


Peter Otten wrote:
> HYRY wrote:
>
> > I want to join two mono wave file to a stereo wave file by only using
> > the default python module.
> > Here is my program, but it is much slower than the C version, so how
> > can I increase the speed?
> > I think the problem is at line #1, #2, #3.
>
> > oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
>
> ITEMSIZE = 2
> size = ITEMSIZE*(len(larray) + len(rarray))
> oarray = array.array("h")
> oarray.fromstring("\0" * size)
>
> may be a bit faster.
> 
> Peter

Thank you very much, that is just what I want.



From fredrik at pythonware.com  Sat Nov 11 20:31:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 02:31:04 +0100
Subject: Decimal() instead of float?
In-Reply-To: <1163294604.4675.4.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
Message-ID: <ej5tgm$f7$1@sea.gmane.org>

Michael B. Trausch wrote:

> Is there a way to use Decimal() by default in Python instead of float?  

nope.

> For example, I have a ZIP code 
> database that can do some processing on its numbers, and the numbers are 
> stored as floating point values (exactly) but Python doesn't get them 
> right

sounds odd.  are you sure you don't mean "stored as strings containing 
decimal numbers" ?

(who uses fractional ZIP codes, btw?)

</F>



From pink at odahoda.de  Thu Nov  9 10:26:37 2006
From: pink at odahoda.de (Benjamin Niemann)
Date: Thu, 09 Nov 2006 16:26:37 +0100
Subject: UnboundLocalError
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
Message-ID: <eivhbi$9eh$1@online.de>

Hello,

Camellia wrote:

> why it generates an "UnboundLocalError" when I do the following:
> 
> <code>
> ...
> def main():
>     number = number()
>     number_user = user_guess()
>     while number_user != number:
>         check_number(number = number, number_user = number_user)
>         number_user = user_guess()
> 
> UnboundLocalError: local variable 'number' referenced before assignment
> </code>
> 
> I found when I changed the number() to num() or whatever the issue
> solved
> but doesn't every function has its own namespace?
> Can anyone please explain it to me?

When Python compiles your code, it sees that you are using a local
variable 'number' in this function ('number = ...') and probably allocates
some memory for it or whatever - ask the core Python hackers for details.
When this statement is executed, the right hand side is evaluated first and
Python finds a reference to 'number'. It knows that number is a local
variable in main(), but has not been assigned yet (which would happend
after the right hand side is evaluated) - thus the error.

Even if you could get this to work, you have two 'number's in the function
with different meaning, which just makes understanding the code too
difficult.

Is number() (the global one) a function or class. I guess it's a function,
so I would suggest to name it 'get_number' (and same
for 'get_user_guess') - this makes the code more descriptive. Should it
really be a class, a common convention is to capitalize it 'Number()'.


HTH

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://pink.odahoda.de/


From onurb at xiludom.gro  Mon Nov 13 06:00:34 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 13 Nov 2006 12:00:34 +0100
Subject: substring search without using built in utils
In-Reply-To: <1163071862.056378.13870@f16g2000cwb.googlegroups.com>
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
	<mailman.1954.1163038984.11739.python-list@python.org>
	<45530805$0$10013$426a74cc@news.free.fr>
	<1163071862.056378.13870@f16g2000cwb.googlegroups.com>
Message-ID: <45585053$0$32008$426a74cc@news.free.fr>

John Machin wrote:
> Bruno Desthuilliers wrote:
>> Gabriel Genellina wrote:
>>> At Wednesday 8/11/2006 22:29, zeal elite wrote:
>>>
>>>> I am looking for substring search python program without using the
>>>> built in funtions like find, or 'in'.
>>> The only reasonable usage for such a constraint would be a school
>>> assignment so: don't cheat and do your homework!
>>>
>> OTHO, looking for existing solutions to a same or similar problem and
>> studying them is usually considerer good practice in real-life
>> programming jobs !-)
>>
> 
> Looking at an existing solution for substring search that was coded in
> Python, instead of using the built-in functionality would IMHO be
> considered extremely bad practice in a real-life programming job.
> 

Indeed.

FWIW, and if it wasn't clear enough, my post was meant to be somewhat
ironic...


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From thomas.weholt at gmail.com  Tue Nov 28 07:35:23 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 28 Nov 2006 04:35:23 -0800
Subject: Dynamic/runtime code introspection/compilation
Message-ID: <1164717323.358146.65410@l39g2000cwd.googlegroups.com>

Maybe a stupid subject, but this is what I want to do :

I got some python code stored in a string:

somecode = """

from somemodule import ISomeInterface

class Foo(ISomeInterface):
    param1 = ...
    param2 = ....

"""

and I want to compile that code so that I can use the Foo-class and
check what class it extends, in this case ISomeInterface etc. I've
tried eval, codeop etc. but it doesn't work. Something like this would
be nice :

from somemodule import ISomeInteface

d = compile(sourcecode)

myfoo = d.Foo()

print ISomeInterface in myfoo.__bases__

Any hints?



From vito.detullio at gmail.com  Sun Nov 26 06:05:05 2006
From: vito.detullio at gmail.com (ZeD)
Date: Sun, 26 Nov 2006 11:05:05 GMT
Subject: problem about list indexing
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
	<1164533754.269071.149590@n67g2000cwd.googlegroups.com>
	<1164537532.420669.323520@45g2000cws.googlegroups.com>
Message-ID: <Bxeah.57806$Fk1.116774@twister2.libero.it>

hollowspook wrote:

> how about indexing 1-7, 10
> [range(1:8),10] will generate [[1, 2, 3, 4, 5, 6, 7], 10], instead of
> [1, 2, 3, 4, 5, 6, 7, 10]

>>> range(1,8)+[10]
[1, 2, 3, 4, 5, 6, 7, 10]

-- 
Under construction


From marko_m at hotmail.it  Tue Nov 14 08:32:26 2006
From: marko_m at hotmail.it (dan84)
Date: 14 Nov 2006 05:32:26 -0800
Subject: PYTHON + EXCEL
Message-ID: <1163511146.329614.210910@k70g2000cwa.googlegroups.com>

I write my code :
#inizializzazioni varie che tralascio


    #mi connetto al mio db mysql e recupero i dati che volgio inserire
nel file excel
    conn = MySQLdb.connect(host = "XXX", port = XXX, user = "XXX",
passwd = "XXX", db= "XXX")
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM XXX")
    allFields = cursor.description
    allRecords = cursor.fetchall()
    cursor.close()
    conn.close()


    #inizializzo gli strumenti per lavorare in python con excel
    xlApp = Dispatch("Excel.Application")
    #xlApp.Visible = 1
    xlApp.Workbooks.Add()


    #specifico che file utilizzare
    xlbook = xlApp.Workbooks.Open('C:/view.xls')
    i = 1
    j = 1


    #popolo il mio file excel
    for field in allFields :
        xlApp.ActiveSheet.Cells(i, j).Value = field[0]
        j = j + 1
    for records in allRecords :
        i = i + 1
        j = 1
        for item in records :
            xlApp.ActiveSheet.Cells(i, j).Value = item
            j = j + 1
    #salvo le modifiche effettuate
    xlbook.SaveAs('C:/view.xls')


    #scrivo le istruzioni che mi permettereanno di aprirlo in una
pagina html
    size = os.path.getsize('C:/view.xls')
    of = open("C:/view.xls","rb")
    content = of.read()
    of.close()


    print"Content-Type:application7vnd.ms-excel"
    print"content-disposition:inline;filename=view.xls"
    print"Content-length:%d \r\n"%size
    print content







I want open an excel document in an apache page.
I want write in excel document the information of a database mySQL and
after open the excel documen in a broswer page
Where is the problem?
Sorry for my english but I'm not speak english very well, I write in
this group because I think that in this forum there are very very good
programmer



From spedrosa at gmail.com  Mon Nov 20 15:20:22 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 20 Nov 2006 12:20:22 -0800
Subject: Finding skilled pythonistas for micro-jobs?
In-Reply-To: <1163897677.460353.69700@e3g2000cwe.googlegroups.com>
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
	<1163897677.460353.69700@e3g2000cwe.googlegroups.com>
Message-ID: <1164054022.550147.157730@m7g2000cwm.googlegroups.com>

Beliavsky wrote:

> I have gotten some Python tasks done at http://www.rentacoder.com.
> Progammers are cheaper outside the U.S. and Western Europe, and you can
> get a lot done for even $100.

I've done a project on RentaCoder (as seller) even though it was not
Python-related. I needed to do quite a bit of search to find a suitable
project. As in, something quick, that I could do in my spare time. What
I found funny is that, with only one project, I've got a better ranking
than +90% of the site's registered coders. They're either not bothering
to get projects after registration or are not completing them
successfully.

There are many projects that do not have a clear scope or are underpaid
($50 for an Amazon-clone). And there are people taking those.

In Brazil, $100 is what programmers earn for two days worth of work, on
average. Even then, I don't even try to compete with Indians, as they
are basically asking for spare change.



Stephen



From onurb at xiludom.gro  Fri Nov 10 05:02:50 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Fri, 10 Nov 2006 11:02:50 +0100
Subject: how is python not the same as java?
In-Reply-To: <mailman.2014.1163123991.11739.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
Message-ID: <45544e4b$0$3977$426a74cc@news.free.fr>

Jorge Vargas wrote:
> On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
>> both are interpreted oo langauges......
>>
> that is not correct java is compiled and the VM interprets the code

So are CPython and IronPython.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pyscripter at gmail.com  Sat Nov 18 21:11:48 2006
From: pyscripter at gmail.com (PyScripter)
Date: 18 Nov 2006 18:11:48 -0800
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <mailman.436.1163881833.32031.python-list@python.org>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
	<NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
	<mailman.436.1163881833.32031.python-list@python.org>
Message-ID: <1163902308.672892.268320@k70g2000cwa.googlegroups.com>


Kirill Simonov wrote:
> PyScripter does, indeed, look nice, but unfortunately it appeared to
> have similar issues with cyrillic support. Thank you anyway for the
> suggestion.


What are the issues?  PyScripter offers full support for utf-8 encoded
files and PEP-263.  The editor internally is unicode based.    Please
read the PyScripter help topic "Encoded Python Source Files", paying
special attention to the last paragraph, and if you follow the
guidelines you should have no problem with cyrillic or other encodings.
 If you have problems email pyscripter at gmail.com for support.



From aahz at pythoncraft.com  Thu Nov 23 10:19:47 2006
From: aahz at pythoncraft.com (Aahz)
Date: 23 Nov 2006 07:19:47 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<mailman.564.1164158130.32031.python-list@python.org>
Message-ID: <ek4e6j$hfn$1@panix3.panix.com>

In article <mailman.564.1164158130.32031.python-list at python.org>,
Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
>
>Typically, classes are created as a subclass of another class. The
>top-level basic type in Python is 'object', so if your class doesn't
>make sense deriving from anything else, derive from 'object'.
>
>    class Point(object):
>        pass
>
>Defining a class with *no* superclass is not recommended. If you don't
>yet understand the difference between the above style (called a
>"new-style" class) and the style you presented, you should always
>derive from a superclass ('object' or something more specific) until
>you encounter a situation where that causes a problem.

Side note: I disagree with the above advice, but it's Thanksgiving and I
don't have enough room on the margin for the proof.  I think classic
classes are just fine.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From farraige at go2.pl  Wed Nov  8 14:58:02 2006
From: farraige at go2.pl (Farraige)
Date: 8 Nov 2006 11:58:02 -0800
Subject: Thank you
References: <1162981094.820174.65440@b28g2000cwb.googlegroups.com>
Message-ID: <1163015882.492701.29840@b28g2000cwb.googlegroups.com>

Thank you all for your very valuable clues!
Thanks to you I got nearly 97% perfomance improvement !!!!!!!!!!!!!!! I
can't believe it :)))
Once again thank you

Best wishes
Farraige



From fredrik at pythonware.com  Thu Nov  2 06:39:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 12:39:41 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <1162466896.660320.112140@e3g2000cwe.googlegroups.com>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>	<4549cf05$0$9363$426a74cc@news.free.fr>
	<1162466896.660320.112140@e3g2000cwe.googlegroups.com>
Message-ID: <eicldq$s9h$1@sea.gmane.org>

wittempj at hotmail.com wrote:

> A little experimentation shows that when something is not callable
> always a TypeError which evaluates to "'<type>' object is not
> callable"

that's not defined by the language specification, though, so your code 
won't be portable, and may break in future releases.

and even if you can live with that, you still cannot distinguish between 
non-callable objects and bugs *inside* the callables, unless you add 
traceback analysis to the exception handler.

</F>



From fredrik at pythonware.com  Fri Nov 17 06:48:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 12:48:56 +0100
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
References: <mailman.277.1163700699.32031.python-list@python.org>	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
Message-ID: <ejk7j8$f5t$1@sea.gmane.org>

krishnakant Mane wrote:

> double wow!  as it is my customer wants me to print to the default printer.
> can you please help me with the command for rendering the pdf to the
> printer with acrobat using python?

see:

     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html

or possibly:

     http://www.planetpdf.com/forumarchive/49365.asp

now go donate some of what the customer is paying you to solve this 
problem for him to the PSF ;-)

</F>



From greg.kujawa at gmail.com  Thu Nov 30 12:27:10 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 30 Nov 2006 09:27:10 -0800
Subject: why would anyone use python when java is there?
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164874749.914101.32410@16g2000cwy.googlegroups.com>
	<1164887352.785404.47250@j44g2000cwa.googlegroups.com>
Message-ID: <1164907630.899290.74640@16g2000cwy.googlegroups.com>

I would recommend learning one language out of each of three potential
groups. Just my $0.02 USD:

1) Larger commercial languages - Java, C++, C#.
2) Fun, productive scripting languages - Python, Ruby
3) Academic languages - C, Lisp, Haskell, Smalltalk

This doesn't mean that Python can't be a larger commercial language, or
that C is only used for teaching purposes. Perhaps these are too broad
of generalizations. But these are three different areas of interest and
having at least one language under your belt in each area would look
good on a resume.

Of course learning _how_ to program in practice is of huge importance.
There are lots of books out there which give examples in several
different languages of how to apply theoretical concepts to your craft.
Although all of these languages aren't inherently object oriented you
can apply such concepts to them to one degree or another to make your
problem solving a little more practical and logical...

Stephen Eilert wrote:
>
> If you are serious about getting a programming career, you should not
> be afraid to learn both Java and Python, perhaps C, Ruby, Lisp. They
> are tools, and more knowledge never hurts.
>



From jgodoy at gmail.com  Thu Nov  9 17:29:26 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Thu, 09 Nov 2006 20:29:26 -0200
Subject: how to create a multicolor "font-string" in pygame??
References: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>
Message-ID: <87wt64qmnt.fsf@gmail.com>

Iacopo.Marmo at gmail.com writes:

> Hi! I need to manipulate multicolor strings, i.e. strings with a color
> associated with each letter.
> Any suggestions?

If you're on Unix / Linux the curses module might help.

-- 
Jorge Godoy      <jgodoy at gmail.com>


From hankpai at gmail.com  Wed Nov 29 04:26:37 2006
From: hankpai at gmail.com (hankpai at gmail.com)
Date: 29 Nov 2006 01:26:37 -0800
Subject: windows problem
In-Reply-To: <mailman.825.1164789331.32031.python-list@python.org>
References: <1164787954.310842.13220@h54g2000cwb.googlegroups.com>
	<mailman.825.1164789331.32031.python-list@python.org>
Message-ID: <1164792397.227220.164720@j72g2000cwa.googlegroups.com>

thanks :)!

On Nov 29, 12:35 am, Phil Thompson <p... at riverbankcomputing.co.uk>
wrote:
> On Wednesday 29 November 2006 8:12 am, hank... at gmail.com wrote:
>
> > Dumb question from extreme newbie.
>
> > Steps so far:
> > 1. Installed Python 2.5
> > 2. Installed Qt 4.2.1 (with mingw) from executable
> > 3. Installed PyQt 4.1 from executable
>
> > Been trying to run the first example (t1.pyw) in the tutorials folder,
> > but the following error pops up while running the from idle-python gui:
>
> > Traceback (most recent call last):
> >   File "C:/TestEnv/t1.pyw", line 7, in <module>
> >     from PyQt4 import QtGui
> > ImportError: DLL load failed: The specified module could not be found.Make sure your PATH includes the directories containing the Qt and MinGW DLLs.
> 
> Phil



From fredrik at pythonware.com  Tue Nov 14 13:47:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 19:47:59 +0100
Subject: Looking for a way to stop execution of script, in the script
In-Reply-To: <d25b6e9a0611141032q537c4017r8d346489dba9759f@mail.gmail.com>
References: <d25b6e9a0611141032q537c4017r8d346489dba9759f@mail.gmail.com>
Message-ID: <ejd30u$3h9$1@sea.gmane.org>

Josh Bloom wrote:

> Hi everyone, I'm looking for a way to stop execution of a script from 
> within the script.
> 
> I'm familiar with this idiom:
> 
> While 1:
>   doFirstThing()
>   doSecondThing()
>   if something:
>     break
>   doThirdThing()
>   break

I'm not.  why are you using a while statement to execute the code once?

> doFirstThing()
> doSecondThing()
> if something:
>     die
> doThirdThing()

sys.exit() ?

(or if you prefer, "raise SystemExit")

</F>



From chris.cavalaria at free.fr  Thu Nov  2 05:57:17 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 02 Nov 2006 11:57:17 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <4549cf05$0$9363$426a74cc@news.free.fr>

Sybren Stuvel a ?crit :
> elderic enlightened us with:
>> are there other ways than the ones below to check for <type
>> 'function'> in a python script?
> 
> First of all, why would you want to? If you want to call the object
> as a function, just do so. Handle the exception that is raised when
> it's raised.

I don't think it's a good idea because when you place a try catch block 
around a function call, you'll catch any exception thrown by the 
function itself and not only the "cannot be called" exception.


From gabor at nekomancer.net  Sun Nov 19 18:23:37 2006
From: gabor at nekomancer.net (gabor)
Date: Mon, 20 Nov 2006 00:23:37 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <4560E3AE.5030307@v.loewis.de>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
Message-ID: <6d301$4560e775$59ad1aca$15362@news.flashnewsgroups.com>

Martin v. L?wis wrote:
> gabor schrieb:
>> 1. simply fix the documentation, and state that if the file-name cannot
>> be decoded into unicode, then it's returned as byte-string. 
> 
> For 2.5, this should be done. Contributions are welcome.
> 
> [...then]
>> [os.path.join(path,n) for n in os.listdir(path)]
>>
>> will not work.
>>
>> 2. add support for some unicode-decoding flags, like i wrote before
> 
> I may have missed something, but did you present a solution that would
> make the case above work?

if we use the same decoding flags as binary-string.decode(),
then we could do:

[os.path.join(path,n) for n in os.listdir(path,'ignore')]

or

[os.path.join(path,n) for n in os.listdir(path,'replace')]

it's not an elegant solution, but it would solve i think most of the 
problems.


> 
>> 3. some solution.
> 
> One approach I had been considering is to always make the decoding
> succeed, by using the private-use-area of Unicode to represent bytes
> that don't decode correctly.
> 

hmm..an interesting idea..

and what happens with such texts, when they are encoded into let's say 
utf-8? are the in-private-use-area characters ignored?

gabor


From sxn02 at yahoo.com  Tue Nov 21 17:53:04 2006
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Tue, 21 Nov 2006 14:53:04 -0800 (PST)
Subject: Help! I need a list, not a pointer to it
Message-ID: <20061121225304.67695.qmail@web56001.mail.re3.yahoo.com>

Hi All,

The following code:

<code>
r=3
c=1
solutions=[]
matrix=[[1.0], [0], [0]]
j=0
while j<c:
  i=0
  j=0
  more=True
  while more:
    while not matrix[i][j]:
      i+=1
    i+=1
    if i==r:
      matrix[0][j]=matrix[i-1][j]
      matrix[i-1][j]=0
      i=0
      j+=1
      if j==c: more=False
    else:
      matrix[i][j]=matrix[i-1][j]
      matrix[i-1][j]=0
      more=False
  print matrix
  solutions.append(matrix) # same result with matrix[:]
print solutions
</code>

gives:
[[0], [1.0], [0]]
[[0], [0], [1.0]]
[[1.0], [0], [0]]
[[[1.0], [0], [0]], [[1.0], [0], [0]], [[1.0], [0], [0]]]
(i.e. the last value of matrix, three times)

How can I end up with:
[[0], [1.0], [0]]
[[0], [0], [1.0]]
[[1.0], [0], [0]]
[[[0], [1.0], [0]], [[0], [0], [1.0]], [[1.0], [0], [0]]]
(i.e. each value of matrix)?

I'm on Python 2.4.1, under Linux.

Thanks,
Sorin




 
____________________________________________________________________________________
Sponsored Link

Online degrees - find the right program to advance your career. 
www.nextag.com
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From eric_brunel at despammed.com  Mon Nov 13 11:41:23 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 13 Nov 2006 17:41:23 +0100
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
Message-ID: <op.tiyra9e4rqur0o@eb.pragmadev>

On Mon, 13 Nov 2006 16:16:37 +0100, rodmc <userprogoogle-139 at yahoo.co.uk>  
wrote:

> Hi,
>
> I have installed Fnorb and everything seems to have gone ok. However I
> keep getting the error message below. This is despite the fact that the
> MS CL c++ preprocessor seems to be in PATH. I can type "cl" and
> although I get nothing back in the DOS window, there is also no error
> message.
>
> Traceback (most recent call last):
>   File "C:\Python24\Lib\site-packages\Fnorb\script\cpp.py", line 53, in
> -toplevel-
>     raise "No C/C++ pre-processor found in your PATH!"
> No C/C++ pre-processor found in your PATH!

You don't say *when* this error occurs, i.e. what is the command that  
returns the exception. Assuming it's when you try to compile an IDL file  
with fnidl, just try:
fnidl --internal-cpp ...

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From luismgz at gmail.com  Thu Nov 16 20:44:17 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 16 Nov 2006 17:44:17 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163715688.959899.65990@h48g2000cwc.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<1163715688.959899.65990@h48g2000cwc.googlegroups.com>
Message-ID: <1163727857.620445.231250@b28g2000cwb.googlegroups.com>


sjdevnull at yahoo.com ha escrito:

> Luis M. Gonz?lez wrote:
> > Cameron Laird ha escrito:
> > > Perhaps it's timely to clarify the "newer" above:  Guido
> > > made Python public in '89-90, and Rasmus showed PHP to
> > > others in '94-95.
> >
> > OK. But since when has python been considered a viable alternative for
> > web development?
> > As a generalp purpose language, it's older.
> > But as a web development language, it's olnly when people started to
> > look for the "rails killer" and many python alternatives started to
> > come up (although Django has been in development for a long time before
> > all this hype).
>
> Huh?  I've been doing paid python web work since 2000.  I'm fairly sure
> that Yahoo! groups predates that by a while, and I know that
> mod_python/httpdapy goes back at least to 1998 (and Python CGI predates
> that significantly).

Do not forget the subject of this thread.
Nobody is criticizing python here. I am a "believer"!
We are talking about important details that matter when choosing a
language, and specially when choosing one for web development.
I'm sure Yahoo, Google and other companies can afford having
knowledgeable people, hardware and resources to use python they way
they like.
The problem is (or was) for mere mortals trying to create a web site on
shared hostings.

We all know that mod_python has its issues, and still is not a common
or affordable feature in the vast mayority of web hosts. And prior to
that, you only had cgi or other rather unknown solutions.
mod_php had a clear advantage here. Perhaps not as a language but as an
ubiquitous and cheap alternative.

In the last months (and I said "months" not years) the situation
improved a lot, but still it is a fair to make a comparison.
My opinion is that python, as a language, is by far a much better
alternative for any use.
But php, as a platform, still has a many advantages, being availability
the main one.

Luis



From wuwei23 at gmail.com  Wed Nov  1 21:02:59 2006
From: wuwei23 at gmail.com (alex23)
Date: 1 Nov 2006 18:02:59 -0800
Subject: logo design
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
Message-ID: <1162432978.995731.291980@f16g2000cwb.googlegroups.com>

Xah Lee wrote:
> No personal offense intended, but human animal's history is what? 3000
> years at least in recorded history? And, all you can think of is what,
> the view points of a fraction of your personal life span?

Thank god evolution spat you out to lead us all to the light, huh?

No personal offense intended, but you're a boring, elitist prick.

- alex23



From userprogoogle-139 at yahoo.co.uk  Tue Nov 14 07:13:42 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 14 Nov 2006 04:13:42 -0800
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
	<op.tiyra9e4rqur0o@eb.pragmadev>
Message-ID: <1163506422.556251.12250@h54g2000cwb.googlegroups.com>

> >
> > Traceback (most recent call last):
> >   File "C:\Python24\Lib\site-packages\Fnorb\script\cpp.py", line 53, in
> > -toplevel-
> >     raise "No C/C++ pre-processor found in your PATH!"
> > No C/C++ pre-processor found in your PATH!
>
> You don't say *when* this error occurs, i.e. what is the command that
> returns the exception. Assuming it's when you try to compile an IDL file
> with fnidl, just try:
> fnidl --internal-cpp ...

Sorry you are right I did not say, but you guessed correctly. However
even when I try your advice I still receive the same error. 

Best,

rod



From anrnsrisnotreqid at blueyonder.co.uk  Tue Nov  7 19:22:03 2006
From: anrnsrisnotreqid at blueyonder.co.uk (djc)
Date: Wed, 08 Nov 2006 00:22:03 GMT
Subject: simple way to un-nest (flatten?) list
In-Reply-To: <1162857363.748796.120430@i42g2000cwa.googlegroups.com>
References: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>
	<pan.2006.11.06.10.43.12.77229@REMOVE.THIS.cybersource.com.au>
	<4cP3h.48258$r61.7630@text.news.blueyonder.co.uk>
	<1162857363.748796.120430@i42g2000cwa.googlegroups.com>
Message-ID: <Lq94h.48906$r61.34740@text.news.blueyonder.co.uk>

bearophileHUGS at lycos.com wrote:
> It is simple, but I suggest you to take a look at the speed of that
> part of your code into your program. With this you can see the
> difference:
> 
> from time import clock
> d = dict((i,range(300)) for i in xrange(300))
> 
> t = clock()
> r1 = sum(d.values(), [])
> print clock() - t
> 
> t = clock()
> r2 = []
> for v in d.values(): r2.extend(v)
> print clock() - t

Yes, interesting, and well worth noting

1   for v in d.values(): r1.extend(v)

2   from itertools import chain
     set(chain(*d.itervalues()))

3   set(v for t in d.values() for v in t)

4   sum(d.values(), [])

5   reduce((lambda l,v: l+v), d.values())

  on IBM R60e [CoreDuo 1.6MHz/2GB]
  d = dict((i,range(x)) for i in xrange(x))
  x 	t1	t2 	t3 	  t4 	  t5
300 	0.0  	0.02  	0.04  	  0.31    0.32
500 	0.01 	0.09 	0.1 	  1.67 	  1.69
1000 	0.02 	0.3 	0.4 	 16.17 	 16.15
	0.03 	0.28 	0.42 	 16.37 	 16.31
1500 	0.03 	0.76 	0.94 	 57.05 	 57.13
2000 	0.07 	1.2 	1.66 	136.6 	136.97
2500 	0.11 	2.34 	2.64 	268.44 	268.85

but on the other hand, as the intended application is a small command 
line app where x is unlikely to reach double figures and there are only 
two users, myself included:
d = 
{'a':['ASLIB','Aslib'],'j':['JDOC','jdoc'],'x':['test','alt','3rd'],'y':['single',]}
	0.0 	0.0 	0.0 	0.0 	0.0

And sum(d.values(), []) has the advantage of raising a TypeError in the 
case of a possible mangled input.

{'a':['ASLIB','Aslib'],'j':['JDOC','jdoc'],'x':['test','alt','3rd'],'y':'single'}
  r1
['ASLIB', 'Aslib', 'test', 'alt', '3rd', 'JDOC', 'jdoc', 's', 'i', 'n', 
'g', 'l', 'e']
r2
set(['Aslib', 'JDOC', 'g', '3rd', 'i', 'l', 'n', 'ASLIB', 's', 'test', 
'jdoc', 'alt', 'e'])
r4 = sum(d.values(), [])
TypeError: can only concatenate list (not "str") to list



-- 
djc


From nun at example.com  Thu Nov 30 18:07:27 2006
From: nun at example.com (Mitja Trampus)
Date: Fri, 01 Dec 2006 00:07:27 +0100
Subject: best way to align words?
In-Reply-To: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
Message-ID: <OuJbh.520$Ib3.377992@news.siol.net>

Robert R. wrote:
> Hello,
> 
> i would like to write a piece of code to help me to align some sequence
> of words and suggest me the ordered common subwords of them
> 
> a trouble i have if when having many different strings my results tend
> to be nothing while i still would like to have one of the, or maybe,
> all the best matches.

"align"?
Anyway, for finding the commonest words, you'll be best off 
counting how many times each word appears:

lst = ["foo bar baz", "qux foo foo kaka", "one foo and kaka 
times qux"]

for line in lst:
  for word in line.split():
   count[word] = count.get(word,0) + 1

Now you go for the ones with the highest count:

for (word, n) in sorted(d.items(), key = lambda x: x[1],
reverse = True):
  print word, 'appears', n, 'times'

Untested. If you want to count the number of lines a word 
appears in (as opposed to the number of times it appears at 
all), add an extra condition before count[word] = ...


From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 18 05:31:16 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 18 Nov 2006 21:31:16 +1100
Subject: decompiler
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
Message-ID: <pan.2006.11.18.10.31.15.728004@REMOVE.THIS.cybersource.com.au>

On Fri, 17 Nov 2006 20:08:25 -0800, jim wrote:

> Is there such thing as a free decompile that I can run in windows xp

Yes.

-- 
Steven.



From fredrik at pythonware.com  Fri Nov  3 03:05:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 09:05:00 +0100
Subject: a newbi problem: can't find complete python curses library
In-Reply-To: <f81479dd0611022104i290b14c4w41dc58cf191882fe@mail.gmail.com>
References: <f81479dd0611022104i290b14c4w41dc58cf191882fe@mail.gmail.com>
Message-ID: <eiet7b$4a9$1@sea.gmane.org>

krishnakant Mane wrote:

> does python possess a complete wrapper to ncurses and its related
> libraries like menu, panel and form?
> if yes then where can I find documentation?

if you want to have good documentation and save a lot of time and 
energy, I recommend building on top of Urwid rather than directly on 
ncurses:

     http://excess.org/urwid/

</F>



From harry.g.george at boeing.com  Thu Nov 16 11:27:51 2006
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 16 Nov 2006 16:27:51 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<455c2773$1@news.unimelb.edu.au>
	<mailman.233.1163671524.32031.python-list@python.org>
Message-ID: <xqxy7qbfjaw.fsf@cola3.ca.boeing.com>

Fredrik Lundh <fredrik at pythonware.com> writes:

> Maurice LING wrote:
> 
> > I admit that it is very very unlikely. I guess it is just a wild
> > dream of mine to run Java bytecodes and Python bytecodes on Python
> > VM. I do have a wild vision that we can import java libraries (as
> > jar files) into CPython.
> 
> http://sourceforge.net/projects/jpype
> 
> </F>
> 


Personally, I've never gotten jpype to work.  Is it just me, or is it
a troublesome install?


-- 
Harry George
PLM Engineering Architecture


From laurent.pointal at limsi.fr  Tue Nov 14 06:42:39 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Nov 2006 12:42:39 +0100
Subject: PyFAQ: help wanted with thread article
In-Reply-To: <mailman.127.1163502668.32031.python-list@python.org>
References: <mailman.127.1163502668.32031.python-list@python.org>
Message-ID: <ejca6u$dog$1@upsn250.cri.u-psud.fr>

Fredrik Lundh a ?crit :
> this FAQ item talks about using sleep to make sure that threads run
> properly:
> 
> http://effbot.org/pyfaq/none-of-my-threads-seem-to-run-why.htm
> 
> I suspect it was originally written for the "thread" module, but as
> far as I know, the "threading" module takes care of the issues described
> here all by itself.
> 
> so, should this item be removed?
> 
> or can anyone suggest a rewrite that's more relevant for "threading"
> users.  feel free to post suggestions (or better, an updated text) to
> this thread, or over at the PyFAQ staging site.

Maybe it could be modified to indicate (for threading) existence of
daemon and non-daemon threads.


> 
> </F>
> 


From m_tayseer82 at yahoo.com  Tue Nov  7 05:41:10 2006
From: m_tayseer82 at yahoo.com (Mohammad Tayseer)
Date: Tue, 7 Nov 2006 02:41:10 -0800 (PST)
Subject: PIL: match for ImageMagick's display -ping
In-Reply-To: <87ac33obzg.fsf@wilson.homeunix.com>
Message-ID: <20061107104110.34831.qmail@web31113.mail.mud.yahoo.com>

>>> import Image
>>> im = Image.open('myimage.jpg')
>>> im.size
(200, 100)

PIL reads the header only in the Image.open() call above.


 
---------------------------------
Sponsored Link

Mortgage rates near 39yr lows. $420,000 Mortgage for $1,399/mo - Calculate new house payment
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From p at ulmcnett.com  Fri Nov  3 23:08:43 2006
From: p at ulmcnett.com (Paul McNett)
Date: Fri, 03 Nov 2006 20:08:43 -0800
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <0cednc5i_d0yZdbYnZ2dnUVZ_sGdnZ2d@comcast.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>	<1162568409.144421.262160@e3g2000cwe.googlegroups.com>
	<0cednc5i_d0yZdbYnZ2dnUVZ_sGdnZ2d@comcast.com>
Message-ID: <454C124B.6010501@ulmcnett.com>

Michael B. Trausch wrote:
> GISDude wrote:
>> Mike,
>> I totally forgot that MS Works was out there. Haven't used that one in
>> about 6 or 7 years. Honestly, your best bet is to convert to .csv or
>> some delimited .txt file. Once that is done, all your rows/columns will
>> be "nice and neat" .
>> Once that is done, (and since your client doesn't have ACCESS, try
>> MYSQL or POSTGRESQL(they are open source). They can handle A LOT OF
>> DATA, so however big your orginal DB is, you can import it to one of
>> these more than capable OS freebie Databases.
> 
> Yeah; the only thing is that I am going to have to write a solution to
> give them "easy" access to their data.  Sometimes, they just want to
> look up a row of data, but they don't want to put their data in a
> database server -- they want it on their machine so that it is "private"
> (FSVO private--it's a Windows box).

You can set up database servers that only serve to the local machine. I 
have a couple applications out there that have MySQL server running on a 
Windows box and the only client that connects is the local machine. 
However, you may find it easier and every bit as rewarding to go with 
the simpler solution: sqlite.

As far as easy access to the data, it is quite possible that Dabo could 
help you there. Once you have your data in sqlite or MySQL, the Dabo 
AppWizard can generate a basic application for you to search, browse, 
edit, and report on your records. The basic application generated can 
then be modified by you (in Python) to make it more custom and to 
enhance it as your needs grow.

sqlite information: http://initd.org/tracker/pysqlite
dabo information: http://dabodev.com

(Please note that the dabodev website is going through some scheduled 
maintenance so it may not be available when you call this weekend, but 
in any case it will be fully functional by Monday).

-- 
pkm ~ http://paulmcnett.com



From gagsl-py at yahoo.com.ar  Tue Nov 21 01:55:34 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 03:55:34 -0300
Subject: move up a level
In-Reply-To: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
References: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061121035203.03db9a88@yahoo.com.ar>

At Tuesday 21/11/2006 03:07, rplobue at yahoo.com wrote:

>alright, noob question: i want to open a file in a directory above the
>current one i'm in.  I'm trying to use myfile =
>open('../thefileiwant.txt', 'r')  but the ../ doesn't work.  How do i
>do it?

Above the process' current dir, or above the dir where the script resides?
You get the latter with os.path.abspath(__file__)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From __peter__ at web.de  Thu Nov 23 06:03:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Nov 2006 12:03:39 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <ek3v57$4m5$03$2@news.t-online.com>

Tor Erik Soenvisen wrote:

> (len(['']) is 1) == (len(['']) == 1) => True
> 
> Is this the case for all numbers? I've tried running the following:
> 
> for i in range(10000):
> ????????????for?j?in?range(10000):
> ????????????????if i != j:
> ????????????????????????assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, 
> (i))

Shouldn't the test in the loop be

                  if i == j:
                      assert i is j


Of course it would fail...

Peter


From claird at lairds.us  Thu Nov 16 17:55:38 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 16 Nov 2006 22:55:38 +0000
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <as6v24-2pa.ln1@lairds.us>

In article <1163711343.870829.110030 at h48g2000cwc.googlegroups.com>,
sturlamolden <sturlamolden at yahoo.no> wrote:
>Boris wrote:
>> Hi, is there any alternative software for Matlab? Although Matlab is
>> powerful & popular among mathematical & engineering guys, it still
>> costs too much & not publicly open. So I wonder if there's similar
>> software/lang that is open & with comparable functionality, at least
>> for numerical aspect. Thanks!
>
>I have used Matlab for years, and has recently changed to Python. In
			.
			.
			.
While I frequently push Matlab users toward Python, they also deserve
to know about Octave <URL: 
http://www-128.ibm.com/developerworks/library/l-oslab/?n-l-10242 >.


From craigtw.online at gmail.com  Sun Nov 26 16:00:33 2006
From: craigtw.online at gmail.com (Craig)
Date: 26 Nov 2006 13:00:33 -0800
Subject: Generating header information using ElementTree
Message-ID: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>

Hi there,

I'm only new to Python so please bear with me.  I using ElementTree to
generate an XML file that will reference a DTD and an XSL file.  The
header information I want at the start of the file is as follows:

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="test.xsl"?>
<!DOCTYPE BobActivityLog SYSTEM "test.dtd">

How do you add this header information to the tree as I can't find any
documentation or examples on how you can do this.  Any help would be
appreciated.  Thank you and good luck.


Craig Williamson



From Roberto.Bonvallet at cern.ch  Fri Nov 10 11:25:45 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Fri, 10 Nov 2006 16:25:45 +0000 (UTC)
Subject: range syntax
References: <mailman.2036.1163170257.11739.python-list@python.org>
Message-ID: <ej2969$uee$1@cernne03.cern.ch>

Colin J. Williams wrote:
> One of the little irritants of Python is that the range syntax is rather 
> long-winded:
> [Dbg]>>> range(3, 20, 6)
> [3, 9, 15]
> [Dbg]>>>
> It would be nice if one could have something like 3:20:6.

In that case, how would the parser know which colon terminates the
'for' in the following example:

    for i in 2:3:4:
	...

-- 
Roberto Bonvallet


From gagsl-py at yahoo.com.ar  Tue Nov 14 14:37:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 14 Nov 2006 16:37:56 -0300
Subject: __cmp__ between dissimilar objects
In-Reply-To: <ejcd27$bmq$1@sea.gmane.org>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<ejcd27$bmq$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061114163517.052b6dd0@yahoo.com.ar>

At Tuesday 14/11/2006 09:33, Fredrik Lundh wrote:

> >>>> GeneralizedTime() > datetime.now()
> > Traceback (most recent call last):
> >  File "<stdin>", line 1, in ?
> > TypeError: can't compare datetime.datetime to GeneralizedTime
> >
> > Clearly I'm misunderstanding something, here.  As I understand my code,
> > I'm directly comparing an instance of datetime (self.datetime) to
> > another instance of datetime.
>
>sure looks like you're comparing a datetime instance against a GeneralizeTime
>instance to me.
>
>why not just inherit from datetime instead?  or read footnote 4 
>under "supported
>operations" on this page for info on how to implement mixed-type comparisions:
>
>     http://docs.python.org/lib/datetime-datetime.html

Ugh... I hope there were good reasons for doing things so convoluted...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From brenNOSPAMbarn at NObrenSPAMbarn.net  Tue Nov 14 13:20:01 2006
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Tue, 14 Nov 2006 18:20:01 GMT
Subject: Unpacking sequences and keywords in one function call
References: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
	<nNmdnervt49hg8TYnZ2dnUVZ_rOdnZ2d@comcast.com>
	<mailman.114.1163473007.32031.python-list@python.org>
	<Xns987ADD0FF21A8OKB@199.45.49.11>
	<VTg6h.6527$L6.3274@newsread3.news.pas.earthlink.net>
Message-ID: <Xns987B68C3BD196OKB@199.45.49.11>

Dennis Lee Bieber wrote:

> On Tue, 14 Nov 2006 05:45:57 GMT, "OKB (not okblacke)"
> <brenNOSPAMbarn at NObrenSPAMbarn.net> declaimed the following in
> comp.lang.python:
> 
>> 
>>          I was just wondering about this yesterday.  Is there a
>>          reason you 
>>     can only unpack a sequence at the END of the positional
>>     argument list? 
> 
>      Not a reasoned explanation, but... Python has to be able to
>      assign 
> "defined" parameters before gathering the */** parameters.

    	Sorry, I don't really understand what you mean by that.  I'm 
talking about the UNpacking of a sequence into separate function 
arguments, which I was assuming happened on the "outside" at the time 
the function was called.  That is, why aren't these two calls exactly 
the same:

a = [2,3]
f(1, *a, 4)
f(1, 2, 3, 4)

    	I don't understand why Python would need to assign "defined 
parameters" first -- the sequence unpacking here can happen before 
anything is mapped to the function parameters at all.  (Can't it?)

    	I can see why moving the kwargs up earlier in the list isn't valid, 
because it isn't valid for normal argument-passing either; switching the 
order of individually named kwargs and a **dict isn't meaningful because 
the kwargs aren't ordered anyway.  But is there a reason you can't 
unpack a sequence into the middle of the positional argument list?

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From martin.laloux at gmail.com  Thu Nov 30 04:19:09 2006
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: 30 Nov 2006 01:19:09 -0800
Subject: Good script editor for Python on Mac OS 10.3
In-Reply-To: <1164841393.939122.202630@80g2000cwy.googlegroups.com>
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
	<1164841393.939122.202630@80g2000cwy.googlegroups.com>
Message-ID: <1164878348.970323.142260@j44g2000cwa.googlegroups.com>

I work with Python on mac os 10.3.9

First of all :

Install a newer version of python for mac, from

http://pythonmac.org/packages/

(python 2.4.4 -> http://pythonmac.org/packages/py24-fat/index.html)
(python 2.5 -> http://pythonmac.org/packages/py25-fat/index.html)

you have a more "standard" python which  allows you to install the
modules n a more conventional way

I use Smultron (free and open source) or textmate



From michael at stroeder.com  Wed Nov 15 11:21:18 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Wed, 15 Nov 2006 17:21:18 +0100
Subject: python-ldap and Python 2.5 (was: Python 2.5 Core Dump on Solaris
 8)
In-Reply-To: <4555132f$0$3586$9b622d9e@news.freenet.de>
References: <mailman.2071.1163195374.11739.python-list@python.org>
	<4555132f$0$3586$9b622d9e@news.freenet.de>
Message-ID: <vcrr24-19i.ln1@nb2.stroeder.com>

Martin v. L?wis wrote:
> Melissa Evans schrieb:
> 
>>I've modified grappy.py,
>>http://www.stacken.kth.se/~mattiasa/projects/grappy/, a postfix policy
>>daemon for greylisting. to use LDAP as a backend instead of SQL (with
>>python-ldap.)  The daemon runs fine when testing but when I put it under
>>load it core dumps quickly.  What little analysis I know how to do shows
>>similar information every time.  Any advice on where to go from here?
> 
> It looks like a memory allocation bug, e.g. caused by a double free,
> or possibly a buffer overrun.

Unfortunately the C part of python-ldap is not in a good shape regarding
Python 2.5 since I'm not a C programmer. Release 2.2.0 works only with
Python 2.3.x. and 2.4.x. :-/

But this seems to help (tested on my local system):
http://sourceforge.net/tracker/index.php?func=detail&aid=1575329&group_id=2072&atid=102072

Generally I also asked for help regarding "PEP 353 - preparation for
Python 2.5":
http://sourceforge.net/tracker/index.php?func=detail&aid=1467529&group_id=2072&atid=102072

I posted a related message to python-ldap-dev list with some patches:
http://sourceforge.net/mailarchive/forum.php?thread_id=30574782&forum_id=4346

During the next days I hope to commit some of the changes I've made
since then. Contributions welcome.

Ciao, Michael.


From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 19 16:51:17 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 20 Nov 2006 08:51:17 +1100
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>

On Sun, 19 Nov 2006 21:35:24 +0100, Mathias Panzenboeck wrote:

> I wrote a few functions which IMHO are missing in python(s itertools).
> 
> You can download them here:
> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
> 
> A short description to all the functions:
> 
> icmp(iterable1, iterable2) -> integer
> 	Return negative if iterable1 < iterable2,
> 	zero if iterable1 == iterable1,
> 	positive if iterable1 > iterable1.


What does it mean for an iterable to be less than another iterable? That
it has fewer items? How do these two iterables compare?

iter([1, 2, None, "foo", 3+2j])

def ones():
    while 1:
        yield 1

Which is smaller?



> isum(iterable, start=0) -> value
> 	Returns the sum of the elements of a iterable
> 	plus the value of parameter 'start'.  When the
> 	iterable is empty, returns start.


You mean just like the built-in sum()?

>>> sum(xrange(12), 1000)
1066


> iproduct(iterable, start=0) -> value
> 	Returns the product of the elements of a iterable
> 	times the value of parameter 'start'.  When the
> 	iterable is empty, returns start.

If I recall, product() was requested about the same time that sum() was
introduced, and Guido rejected it as a built-in because it was really only
useful for calculating geometric means, and it is easy to do if you need
it:

def product(it, start=1):
    # default value of 1 is more sensible than 0
    # 1 is the multiplicative identity
    p = start
    for x in it:
        p *= x
    return p


> forall(predicate, iterable, default=True) -> bool
> 	Returns True, when for all elements x in iterable
> 	predicate(x) is True. When the iterable is empty,
> 	returns default.
> 
> 
> forany(predicate, iterable, default=False) -> bool
> 	Returns True, when for any element x in iterable
> 	predicate(x) is True. When the iterable is empty,
> 	returns default.


I vaguely recall plans for all() and any() builtins -- perhaps for Python
2.5?


> take(n,iterable) -> iterator
> 	returns a iterator over the first n
> 	elements of the iterator

Just like itertools.islice(iterable, n).

>>> list(itertools.islice(xrange(10), 5))
[0, 1, 2, 3, 4]


> drop(n,iterable) -> iterable
> 	drops the first n elemetns of iterable and
> 	return a iterator over the rest

Just like itertools.islice(iterable, n, None)

>>> list(itertools.islice(xrange(20), 15, None))
[15, 16, 17, 18, 19]

(Aside: I think islice would be so much cleaner if it took keyword
arguments.)



> heads(iterable) -> iterator over all heads
> tails(iterable) -> iterator over all tails

What would you use these for?


> fcain(funct,*functs) -> function(...,***)
> 	fcain(f1,f2,...,fn)(*args,*kwargs) equals f1(f2(...fn(*args,*kwargs)))


The usual term for this is function composition.


-- 
Steven.



From bearophileHUGS at lycos.com  Thu Nov  2 13:22:33 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Nov 2006 10:22:33 -0800
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1677.1162490601.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<mailman.1677.1162490601.11739.python-list@python.org>
Message-ID: <1162491753.605134.162700@i42g2000cwa.googlegroups.com>

Robert Kern:
> We distribute mingw set up to do this with our "Enthought
> Edition" Python distribution.
> http://code.enthought.com/enthon/

Sorry, maybe I'm blind but I don't see MinGW listed in that page...
Maybe it's included but not listed...

Bye,
bearophile



From chris.cavalaria at free.fr  Thu Nov  9 06:49:16 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 09 Nov 2006 12:49:16 +0100
Subject: Sorted list - how to change it
In-Reply-To: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
Message-ID: <45531598$0$9353$426a74cc@news.free.fr>

Lad a ?crit :
> I have a sorted list for example [1,2,3,4,5] and I would like to change
> it in a random way
> e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
> ordered.
> What is the best/easiest
>  way how to do it?
> 
> Thank you for help
> L.
Not accepting that the shuffle outputs the same list as entered would 
make the random less random :)



From jeffrey.aylesworth at gmail.com  Thu Nov 23 19:36:06 2006
From: jeffrey.aylesworth at gmail.com (jeff)
Date: 23 Nov 2006 16:36:06 -0800
Subject: reading id3 tags with python
Message-ID: <1164328566.089711.89870@l12g2000cwl.googlegroups.com>

i stated using a python module called id3reader
(http://www.nedbatchelder.com/code/modules/id3reader.html) and i tried
to use it to organize all my music files (right now they are all in one
folder (i want them in Music/artist/album/title.mp3)) but im getting an
error with the code, however it does seem to be from the id3 library,
and not from /my/ code, so if somebody knows how to fix this problem,
or even if somebody knows of a better id3 library please tell me.

my code::
#############################################
#! /usr/bin/python
import id3reader as id3
from glob import *
import sys, os
#from shutil import *

if len(sys.argv) >= 2:
  location = sys.argv[1]
else:
  location = '../'

files = glob(location + "*.mp3")

print "\n\n"
print "Welcome to the MP3 renamer"
print "files following this pattern will be changed::"
print location + "*.mp3"
print str(len(files)) + " will be affected"
Continue = True
while Continue == True:
  x = raw_input("\tContinue?(y/n)")
  if x=='y' or x=='n':
    if x=='y':
      print "continueing..."
    Continue = False
#################################
for file in files:
  info = id3.Reader(file)
  data = {}
  data['artist'] = info.getValue('performer')
  if data['artist'] == None:
    data['artist'] = "Unknown Artist"
  data['album'] = info.getValue('album')
  if data['album'] == None:
    data['album'] = "Unknown Album"
  data['title'] = info.getValue('title')

  try:
    os.mkdir(data['artist'])
    os.mkdir(data['artist'] + '/' + data['album'])
  except OSError:
    print "directory already exists...continueing anyways"

  #print data
  new_file = data['artist'] + '/' + data['album'] + '/' + data['title']
+ '.mp3'
  os.rename(file,new_file)

print "\n\n"
#############################################
for those of you who dont understand this, ill try to explain my best
here::
lines::
1) shebang (telling linux to use python)
2-5) imports (shutils was commented out -- i was using this before, but
now im not)
7-10) finding out the directory to find the music in
12) getting a tuple of all the files in the directory it's looking in
with the extension mp3
14-25) making sure you realy want to do this
27-end) for each file::
  27-36) getting all the id3 info and storing it in a dictionary
  38-42) tries to make the directories (try will make sure no error is
shown if they already exist)
  45-46) renames he file, into the new directory



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 10 19:45:51 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 11 Nov 2006 11:45:51 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
Message-ID: <pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 21:24:50 +0100, Bjoern Schliessmann wrote:

> Marc 'BlackJack' Rintsch wrote:
> 
>> No it doesn't -- look again at the example given above.  It's
>> legal syntax in Python but doesn't have the semantics implied by
>> the example.
> 
> Sorry, I don't understand -- what is the difference between the
> example as it is and the implied semantics of it?

Inform 6 "x == blue or red or yellow" is equivalent to the Python
 
x == blue or x == red or x == yellow

or if you prefer:

x in (blue, red, yellow)

And just for the avoidance of doubt, Python "x == blue or red or yellow"
is semantically equivalent to:

(x == blue) or bool(red) or bool(yellow)



-- 
Steven.



From mail at microcorp.co.za  Sat Nov  4 00:57:21 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 4 Nov 2006 07:57:21 +0200
Subject: Having trouble with file modes
References: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
Message-ID: <00be01c6ffd6$18839a80$03000080@hendrik>

 "erikcw" <erikwickstrom at gmail.com> wrote:
8<--------------------------------

> #loop through patterns list and find/replace data
> for o, r in patterns:
>     data = data.replace(o, r)
>     print "Replaced %s with %s" % (o, r)
> f.write(data)
> f.close()
>
> This results in an empty file.  All of the modes I've tried either
> produce an empty file or append the data onto the end of the file.  How

I would take a hard look at what the find and replace does - it acts as if you
are replacing
*everything*   with   *nothing*....

- Hendrik



From cjw at sympatico.ca  Tue Nov 14 09:59:23 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 14 Nov 2006 09:59:23 -0500
Subject: Research Master 0.1 (GPL/Python)
In-Reply-To: <1163438875.744584.52060@m73g2000cwd.googlegroups.com>
References: <1163438875.744584.52060@m73g2000cwd.googlegroups.com>
Message-ID: <ejclkc$d1v$1@sea.gmane.org>

ccosse at gmail.com wrote:
> ResearchMaster has been designed to simplify management of research
> literature. It is a GUI interface to a system of folders and records.
> Each record contains notes, meta info and BibTex info about an
> associated file.  Instances of the single copy of a record can occur
> throughout the folder system, as specified through a membership list.
> A single button creates a recursive bibliography of all records
> containing BibTex information which are children of the currently
> selected parent node. One click launching of files by an associated
> application is also supported. A tutorial document is included.
> 
> http://www.asymptopia.org
> 
The Windows version seems to offer a great way to burn cycles but not 
much else.

Colin W.

PS What's the connection to Python?



From mike.klaas at gmail.com  Mon Nov 13 15:44:28 2006
From: mike.klaas at gmail.com (Klaas)
Date: 13 Nov 2006 12:44:28 -0800
Subject: Python memory usage
In-Reply-To: <1163446161.594913.269050@b28g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>
	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>
	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>
Message-ID: <1163450668.617908.208020@h54g2000cwb.googlegroups.com>

velotron wrote:
> On Nov 9, 8:38 pm, "Klaas" <mike.kl... at gmail.com> wrote:
>
> > I was referring specifically to abominations like range(1000000)
>
> However, there are plenty of valid reasons to allocate huge lists of
> integers.
I'm sure there are some; I doubt there are plenty.  Care to name a few?

> This issue has been worked on:
> http://evanjones.ca/python-memory.html
> http://evanjones.ca/python-memory-part3.html
>
> My understanding is that the patch allows most objects to be released
> back to the OS, but can't help the problem for integers.  I could be

Integers use their own allocator and as such aren't affected by Evan's
patch.

> mistaken.  But on a clean Python 2.5:
>
> x=range(10000000)
> x=None
>
> The problem exists for floats too, so for a less contrived example:
>
> x=[random.weibullvariate(7.0,2.0) for i in xrange(10000000)]
> x=None
>
> Both leave the Python process bloated in my environment.   Is this
> problem a good candidate for the FAQ?

I think floats use obmalloc so I'm slightly surprised you don't see
differences.  I know that evan's patch imposes conditions on freeing
obmalloc arenas, so you could be seeing effects of that.

-Mike



From horpner at yahoo.com  Fri Nov 10 08:18:30 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 14:18:30 +0100
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<slrnej74sp.nc.horpner@FIAD06.norwich.edu>
	<1163124175.648350.202540@k70g2000cwa.googlegroups.com>
Message-ID: <slrnel8v31.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-10, John Machin <sjmachin at lexicon.net> wrote:
>
> Neil Cerutti wrote:
>> On 2006-10-16, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
>> > Hello,
>> >
>> > here is something that surprises me.
>> >
>> >   #coding: iso-8859-1
>>
>> I think that's supposed to be:
>>
>> # -*- coding: iso-8859-1 -*-
>>
>
> Not quite. As PEP 263 says:
>
> """
> More precisely, the first or second line must match the regular
> expression "coding[:=]\s*([-\w.]+)". 
> """

Yep. I was erroneously going by the example in the Unicode Howto.
Thanks for the correction.

-- 
Neil Cerutti


From martin at v.loewis.de  Fri Nov 10 03:55:38 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 10 Nov 2006 09:55:38 +0100
Subject: Localized (international) informations on WXP
In-Reply-To: <mailman.2026.1163147937.11739.python-list@python.org>
References: <mailman.2026.1163147937.11739.python-list@python.org>
Message-ID: <45543e8a$0$12374$9b622d9e@news.freenet.de>

durumdara schrieb:
> I want to get localized informations like month names, format
> parameters, etc.

Month names are available through calendar.month_name. Format
parameters are available through locale.localeconv.

> Have the Python a way to get these informations in uniformed way (like
> php) to avoid multiplatform problems ?

It exposes all of the C locale API, yes. Whether that's like php,
I don't know.

Regards,
Martin


From nnorwitz at gmail.com  Thu Nov  2 00:36:34 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 1 Nov 2006 21:36:34 -0800
Subject: compiling on AIX 5.3 with vacpp
In-Reply-To: <1162409488.718356.38600@e3g2000cwe.googlegroups.com>
References: <1161895884.160561.308020@e3g2000cwe.googlegroups.com>
	<1162005830.878986.204250@m73g2000cwd.googlegroups.com>
	<1162409488.718356.38600@e3g2000cwe.googlegroups.com>
Message-ID: <1162445794.552670.165660@h48g2000cwc.googlegroups.com>

pruebauno at latinmail.com wrote:
>
> indeed as you say. libintl.h is required so I hard coded it into
> setup.py to no effect. At what point does setup.py get called? by make?

Yes.  When you do make, python itself is built.  After that, with the
built python setup.py gets called to build all the modules.

BTW, it's best to copy me on all mails as I read c.l.p only
occassionally.

n



From noah.rawlins at comcast.net  Thu Nov 30 21:46:44 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Thu, 30 Nov 2006 21:46:44 -0500
Subject: best way to align words?
In-Reply-To: <zY6dnXp7Fa0uD_LYnZ2dnUVZ_oGdnZ2d@comcast.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
	<zY6dnXp7Fa0uD_LYnZ2dnUVZ_oGdnZ2d@comcast.com>
Message-ID: <Y8ydnQPTrKgMCvLYnZ2dnUVZ_sadnZ2d@comcast.com>

Noah Rawlins wrote:
> 
>  >>> strList = []
>  >>> strList.append('this is an example of a thing i would like to have')
>  >>> strList.append('another example of something else i would like to 
> have')
>  >>> strList.append('and this is another " example " but of something ; 
> now i would still like to have')
>  >>> [word for word in strList[0].split() if word in reduce(lambda x, y: 
> x.intersection(y), [set(str.split()) for str in strList])]
> ['example', 'of', 'i', 'would', 'like', 'to', 'have']
> 

I think that ends up doing the set reduction over and over for every 
word in the first string, so you probably want to move that outside the 
list comprehension

noah


From gandalf at designaproduct.biz  Mon Nov 13 07:45:50 2006
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 13 Nov 2006 13:45:50 +0100
Subject: Set header from IMAP
Message-ID: <455868FE.2020608@designaproduct.biz>


  Dear List,

I'm trying to figure out, how to change the header of an e-mail that is 
accessed by an IMAP object.
There is some code below (not a complete program). The key function is 
the filter_mail function. It should move/delete/change/export messages, 
based on their header. For exporting messages, I use this: "typ,dat = 
self.conn.uid('FETCH',self.uid,'(RFC822)') ". The only thing I don't 
know how to do, is to insert/modify/delete custom headers in e-mails. I 
was looking for this on Google and the Python cookbook, but I did not 
find anyting useful. Please help.

   Laszlo


import local
import imaplib

class IMAPError(Exception):
    pass

def check_imap_error((typ,data)):
    if (typ != 'OK'):
        raise IMAPError((typ,data))
   
def getnewimapconnection():
    conn = imaplib.IMAP4_SSL(local.IMAP_HOST)
    check_imap_error(conn.LOGIN(local.IMAP_LOGIN,local.IMAP_PWD))
    return conn


conn = getnewimapconnection()
cnt = 0
try:
    for inputfolder in (local.SOURCE_FOLDER,local.SOURCE_FOLDER2):
        typ,data = conn.select(inputfolder)
        check_imap_error((typ,data))
        cnt = int(data[0])

        if cnt > 0:
            self.logger.info("Processing %s messages in %s",cnt,inputfolder)
            # Get UID and RFC822 headers for all messages
            typ, items = conn.fetch('1:%s'%cnt, '(UID RFC822.HEADER)')
            check_imap_error((typ, items))
            for item in items:
                if isinstance(item,tuple):
                    uid = item[0].split()[2]
                    headers = item[1]
                    parser = email.Parser.Parser()
                    parsed = parser.parsestr(headers,True)
                    filter_mail(conn,uid,parsed)
            conn.expunge()
        else:
            self.logger.info("No new messages in %s",inputfolder)
finally:
    conn.logout()





From ytlim1 at gmail.com  Sat Nov 18 15:59:49 2006
From: ytlim1 at gmail.com (Why Tea)
Date: 18 Nov 2006 12:59:49 -0800
Subject: print with variable justification (with *)
Message-ID: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>

print format % values
An optional minimum width of the conversion, specified using one or
more digits or an asterisk (*), which means that the width is taken
from the next item in values

That's from one of O'reilly's books. But there is no example and I
couldn't get it to work by trials and errors. Does anyone have a
working example?

/Why Tea



From noreply at python.org  Fri Nov  3 13:41:52 2006
From: noreply at python.org (Returned mail)
Date: Fri, 3 Nov 2006 13:41:52 -0500
Subject: Delivery reports about your e-mail
Message-ID: <20061103183943.34501AFB9F@correo.alfavia.com>

The original message was received at Fri, 3 Nov 2006 13:41:52 -0500 from [12.180.255.221]

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

----- Transcript of the session follows -----
... while talking to host 100.40.127.201:
554 5.0.0 Service unavailable; [155.65.210.116] blocked using bl.spamcop.net
Session aborted

-------------- next part --------------
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From anderslanglands at gmail.com  Wed Nov 22 09:06:44 2006
From: anderslanglands at gmail.com (anders)
Date: 22 Nov 2006 06:06:44 -0800
Subject: PyQt app in seperate thread
In-Reply-To: <mailman.588.1164201252.32031.python-list@python.org>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
Message-ID: <1164204404.675906.59020@b28g2000cwb.googlegroups.com>


Phil Thompson wrote:
> On Wednesday 22 November 2006 12:37 pm, anders wrote:
> > I am writing a plugin for a piece of software in python, and I want to
> > start up a PyQt GUI in the plugin, without stalling the main thread
> > while the gui is running (later i will want to pass messages between
> > the main thread and the gui thread).
> >
> > I'm new to pyqt, so I'm probably doing something very silly, but for
> > the moment I'm just trying to get the first pyqt tutorial example
> > running in a seperate thread:
> >
> > ----8<--------
> >
> > import sys
> > from PyQt4 import QtGui
> > from PyQt4 import QtCore
> >
> > class MyThread( QtCore.QThread ):
> > 	def __init__( self ):
> > 		QtCore.QThread.__init__( self )
> >
> > 	def run( self ):
> > 		app = QtGui.QApplication( sys.argv )
> > 		hello = QtGui.QPushButton( 'Hello world!' )
> > 		hello.resize( 500, 500 )
> > 		hello.show()
> > 		app.exec_()
> > 		QtCore.QThread.terminate(  )
> >
> >
> >
> > mt = MyThread()
> > mt.start()
> > print 'Main thread continuing...'
> > mt.wait()
> > print 'GUI thread finished.'
> >
> > ----8<--------
> >
> > The app starts up (with a warning WARNING: QApplication was not created
> > in the main() thread. ). I get a window, but no button, and clicking on
> > the close button does nothing and I have to force the program to quit.
> >
> > There's got to be a way to get this working, right? Can anyone help me
> > along the right path?
>
> Read http://doc.trolltech.com/4.2/threads.html
>
> In particular the bit that says that exec_() must be called from the main
> thread and not from a QThread.
>
> Phil


OK so that's all good... so how do I go about doing what I want then?
Can I set up a window in the second thread and start its event loop
without running the event loop in the core app?



From bj_666 at gmx.net  Tue Nov 28 04:15:45 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 28 Nov 2006 10:15:45 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
Message-ID: <pan.2006.11.28.09.15.45.744752@gmx.net>

In <8osmm21skionildtnme1j0nvqbla6oqk72 at 4ax.com>, Vincent Delporte wrote:

> Anyone knows if those lines are necessary, why, and what their
> alternative is in Python?
> 
> -------
> open STDOUT, '>/dev/null'; 

sys.stdout = open(os.devnull, 'w') 

Ciao,
	Marc 'BlackJack' Rintsch


From Google at Bodoin.com  Mon Nov 13 13:34:50 2006
From: Google at Bodoin.com (Max)
Date: 13 Nov 2006 10:34:50 -0800
Subject: httplib.ResponseNotReady question
In-Reply-To: <mailman.76.1163442478.32031.python-list@python.org>
References: <1163441112.359818.208520@m7g2000cwm.googlegroups.com>
	<mailman.76.1163442478.32031.python-list@python.org>
Message-ID: <1163442890.496303.241350@k70g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Max wrote:
>
> > If I run this with loops=1 then everything works fine.  If I use a
> > number greater than 1 then I get the error.  Is there a method call
> > that I need to restore the requestor object to a condition where it's
> > eligible to receive another response?
>
> I'm pretty sure that to get a new response from the server, you need to
> make a new request.
>
> </F>

I think you are right.  I found a note in the documentation that says
the connection is good for one transaction.

Thanks, Max



From stefan.behnel-n05pAM at web.de  Thu Nov 16 02:51:35 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 16 Nov 2006 08:51:35 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <mailman.208.1163621095.32031.python-list@python.org>
References: <mailman.208.1163621095.32031.python-list@python.org>
Message-ID: <455C1887.6060602@web.de>

Hi,

Chas Emerick wrote:
> I looked around for an ElementTree-specific mailing list, but found none
> -- my apologies if this is too broad a forum for this question.

The lxml mailing list is always happy to receive feedback, but it's fine to
ask here if it's not lxml specific.


> I've been using the lxml variant of the ElementTree API.
> it shares the use of a .tail attribute.  I
> ran headlong into this aspect of the API while doing some DOM
> manipulations, and it's got me pretty confused.
> 
> Example:
> 
>>>> from lxml import etree as ET
>>>> frag = ET.XML('<a>head<b>inside</b>tail</a>')
>>>> b = frag.xpath('//b')[0]
>>>> b
> <Element b at 71cbe8>
>>>> b.text
> 'inside'
>>>> b.tail
> 'tail'
>>>> frag.remove(b)
>>>> ET.tostring(frag)
> '<a>head</a>'
> 
> As you can see, the .tail text is removed as part of the <b> element --
> but it IS NOT part of the <b> element.

Yes, it is. Just look at the API. It's an attribute of an Element, isn't it?
What other API do you know where removing an element from a data structure
leaves part of the element behind?

If you want to copy part of of removed element back into the tree, feel free
to do so.


> Performing the same operations with the Java DOM api
> (Sorry for the Java comparison, but that's where I first cut my teeth on
> XML, and that's where my expectations were formed.)
> 
> That's a pretty significant mismatch in functionality.

IMHO, DOM has a pretty significant mismatch with Python.


> I ran this issue past a few people I know who've worked with and written
> about ElementTree, and their response to this apparent divergence
> between the ET DOM API and "standard" DOM APIs was roughly: "that's just
> the way it is".

It's just a matter of understanding (or getting used to) the API. You might
want to stop thinking in terms of '<' and '>' and rather embrace the API
itself as a way to work with the XML Infoset (rather than the XML DOM).

Stefan


From will at willmcgugan.com  Wed Nov  1 10:16:57 2006
From: will at willmcgugan.com (Will McGugan)
Date: 1 Nov 2006 07:16:57 -0800
Subject: 3d programming without opengl
In-Reply-To: <mailman.1526.1162280594.11739.python-list@python.org>
References: <mailman.1526.1162280594.11739.python-list@python.org>
Message-ID: <1162394216.958479.297410@e64g2000cwd.googlegroups.com>


nelson - wrote:
> hi!
>    i want to build up a simple 3d interactive geometry application in
> python. Since i want to run it without 3D acceleration (a scene will
> be quite simple) I was wondering if there was a library in python that
> allow me to build 3D graphic without the need to use OpenGL.... I
> google but i can't find nothing interesting... (the best would be a
> pure python solution)

If you are worried about running your 3d app on older machines, OpenGL
will typically fall back to software rendering if the hardware isn't
available. Although you would have to be running it on an ancient PC if
that is an issue.

If you really want to avoid OpenGL, then writing a custom 3D engine
using flat shaded polys, with painters algorithm, rendered with your
favourite gui toolkit isn't a great deal of work.


Will McGugan
--
http://www.willmcgugan.com



From steve at holdenweb.com  Mon Nov 13 13:09:03 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 12:09:03 -0600
Subject: jython's future
In-Reply-To: <1163440390.3434.45.camel@dot.uniqsys.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>	<4rrjenFspqicU2@mid.uni-berlin.de>
	<4558ACAC.1030001@web.de>
	<1163440390.3434.45.camel@dot.uniqsys.com>
Message-ID: <ejac9n$21u$1@sea.gmane.org>

Carsten Haese wrote:
> On Mon, 2006-11-13 at 18:34 +0100, Stefan Behnel wrote:
>> Honestly, how many important Python modules do still run on 2.2?
> 
> InformixDB still compiles on 2.2 except when I accidentally temporarily
> break backwards compatibility.
> 
> Of course it's a matter of opinion whether it qualifies as an important
> module. ;-)
> 
I think you will find that most of Fredrik Lundh's stuff will work on 
1.5.2. He sets a fine example to us all.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Wed Nov  1 10:47:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 16:47:04 +0100
Subject: Beginning setup problem
In-Reply-To: <1162394759.233035.21380@f16g2000cwb.googlegroups.com>
References: <1162394759.233035.21380@f16g2000cwb.googlegroups.com>
Message-ID: <eiafhn$7tk$1@sea.gmane.org>

vedran at v-programs.com wrote:
> Before few months,I write to this mailing list with python script
> install problem,but nobody give me right solution.I work on windows
> XP,and Python 2.4.
> Now,when I write in Python 2.4:
> 
>>>> from distutils.core import setup
>>>> setup(......) # whatever I write

can you be a bit more precise?

> I got the error:
> 
> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in -toplevel-
>     setup()

 >>> from distutils.core import setup
 >>> setup()
usage:  [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
    or:  --help [cmd1 cmd2 ...]
    or:  --help-commands
    or:  cmd --help

error: no commands supplied

</F>



From beliavsky at aol.com  Wed Nov  8 09:49:05 2006
From: beliavsky at aol.com (Beliavsky)
Date: 8 Nov 2006 06:49:05 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
Message-ID: <1162997345.277966.31860@h48g2000cwc.googlegroups.com>


Cliff Wells wrote:
> On Mon, 2006-11-06 at 18:20 -0800, Beliavsky wrote:
> > Carl J. Van Arsdall wrote:
> >
> > <snip>
> >
> > > Pyro is fucking amazing and has been a great help to a couple of our projects.
> >
> > You should watch your language in a forum with thousands of readers.
>
> The LA Times had a story that claimed that 64% of U.S. citizens use the
> word "fuck" and that 74% of us have heard it in public (I'll assume the
> remainder are your fellow AOL users).  I expect extrapolating these
> results worldwide wouldn't be far off the mark (the Brits were quite
> successful at spreading this versatile word).

If this is supposed to justify using bad language in a public forum, it
is poorly reasoned. Having heard "f***" does not mean they were not
annoyed. 100% of people have seen trash on the street, but that does
not justify littering. If a group of people don't mind profanity, there
is no harm in their swearing to each other. But Usenet is read by a
wide range of people, and needlessly offending some of them is wrong.
The OP used "f******" just for emphasis. English is a rich language,
and there are better ways of doing that.



From johnjsal at NOSPAMgmail.com  Tue Nov  7 16:28:37 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 16:28:37 -0500
Subject: sqlite query not working
In-Reply-To: <mailman.1855.1162934802.11739.python-list@python.org>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>	<mailman.1854.1162933832.11739.python-list@python.org>	<4550f7a5$0$14445$c3e8da3@news.astraweb.com>
	<mailman.1855.1162934802.11739.python-list@python.org>
Message-ID: <4550fa9f$0$17710$c3e8da3@news.astraweb.com>

Tim Chase wrote:

> I tinkered with the mx.ODBC drivers a bit and had a similar
> difficulty until I realized that it was configured to *not*
> autocommit.  At least in the mx.ODBC drivers, you can pass a
> param ("clear_auto_commit=1") to the Connect() call to restore
> "normal" autocommiting behavior.  I can see both sides of the
> fence...it's just a hassle to sniff out which DB drivers
> autocommit and which don't.

What's really strange is that I'm pretty sure (but can always be wrong) 
that I've written SQLite queries just as above, and they were saved to 
the DB without a commit() call, so it's not like I was even using a 
different system. Ah well, I'm sure there was *something* different 
about the two cases! :)


From justsayyes at charter.net  Tue Nov  7 13:28:04 2006
From: justsayyes at charter.net (JFletcher)
Date: Tue, 7 Nov 2006 10:28:04 -0800
Subject: Tired of spam, unrelated email?
Message-ID: <000601c7029a$7b0a7310$6400a8c0@genesis>

Post you questions on the python forum at http://www.thescripts.com
-------------- next part --------------
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From deets at nospam.web.de  Mon Nov  6 08:07:23 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Nov 2006 14:07:23 +0100
Subject: Is there any python lib for calling CVS api?
References: <1162804318.492725.245410@f16g2000cwb.googlegroups.com>
Message-ID: <4r8qcbFpkllgU1@uni-berlin.de>

ironpythonster at gmail.com wrote:

>   Hi everyone, this should be a quick question.  I'm writing some
> scripts
> to take some file and move them into a CVS repository, but it's pretty
> slow, because it uses system calls to execute the CVS commands.
> 
>  Has anyone ever made a python to CVS interface library that I could
> use?

AFAIK there is no such thing as a CVS-library. Which was one of the
motivations behind subversion, which offers its functionality through a
library that has a python wrapping available.

Diez


From paul at boddie.org.uk  Thu Nov 16 17:41:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 14:41:27 -0800
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
	<455cc9ae$1@news.unimelb.edu.au>
	<1163714745.576178.157790@b28g2000cwb.googlegroups.com>
	<455ce5e5$1@news.unimelb.edu.au>
Message-ID: <1163716887.478864.244030@i42g2000cwa.googlegroups.com>

Maurice LING wrote:
>
> I take a simplistic view that Java bytecodes is all that is to be dealt
> with.

Well, that and things like class loading. You'll need a library
implementing the "standard" Java API, although that's never been hard
to obtain, and the official implementation will be genuinely free to
redistribute before too long as well.

> And the book "Programming for the Java Virtual Machine" by Joshua
> Engel did demonstrated in principle that it is possible to program in
> Java bytecodes. There are also other researchware which tried to compile
> other languages into Java bytecodes. I am not sure if exception handling
> etc are dealt with before bytecode level. I also envision that the core
> implementation of JVM is a big switch statement, just like in Python VM
> (the bytecode executor).

It's just an instruction set, but with some fairly "complicated"
instructions, just as you find in the Python virtual machine
instruction set - don't expect them all to be like RISC instructions,
or even traditional CISC instructions.

> Will it then be the case of adding the set of Java bytecodes into Python
> bytecodes and implementing Java bytecode operations? Or am I just
> fooling myself here?

Take a look at the code, although you might want to steer clear of the
import hooks initially:

http://www.python.org/pypi/javaclass

Paul



From fredrik at pythonware.com  Thu Nov 23 03:23:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 09:23:28 +0100
Subject: utf - string translation
In-Reply-To: <1164240141.864918.41640@f16g2000cwb.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>	<mf19h.1992$%_2.1833@newsfe19.lga>	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>	<4564dd7b$0$1349$834e42db@reader.greatnowhere.com>
	<1164240141.864918.41640@f16g2000cwb.googlegroups.com>
Message-ID: <ek3lq1$4j7$1@sea.gmane.org>

Klaas wrote:

> It's not too hard to imagine an accentual difference, eg:

especially in languages where certain combinations really are distinct 
letters, not just letters with accents or silly marks.

I have a Swedish children's book somewhere, in which some characters are 
harassed by a big ugly monster who carries a sign around his neck that 
says "Monster".

the protagonist ends up adding two dots to that sign, turning it into 
"M?nster" (meaning "model", in the "model citizen" sense), and all ends 
well.

just imagine that story in reverse.

</F>



From inq1ltd at verizon.net  Fri Nov  3 11:00:49 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 03 Nov 2006 11:00:49 -0500
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <454B423C.20400@holdenweb.com>
References: <4549FA01.4090706@vtxmail.ch> <454A4E1D.8030106@vtxmail.ch>
	<454B423C.20400@holdenweb.com>
Message-ID: <200611031100.49503.inq1ltd@verizon.net>

On Friday 03 November 2006 08:21, Steve Holden 
wrote:
> Frederic Rentsch wrote:
> > jim-on-linux wrote:
> >>Frederic,
> >>
> >>I've been trying to get back into my package
> >> in the Cheese Shop for over a year. The
> >> phone company changed my e:mail address and
> >> to make a long and frustrating story short I
> >> can't get back into the Cheese Shop to make
> >> changes to my file.
> >>
> >>Time is money.  At some time you have to
> >> consider if it is worth it.  At least you
> >> have the name of your program listed.
> >>
> >>I wish I could be more helpfull. I'll watch
> >> the responses you get from others.
> >>
> >>Good Luck,
> >>jim-on-linux
> >>
> >>http://www.inqvista.com
> >>
> >>On Thursday 02 November 2006 09:00, you wrote:
> >>>Some time ago I had managed to upload a
> >>> small package to the Cheese Shop using the
> >>> data entry template. Uploading is in two
> >>> steps: first the text then the package
> >>> file. When I had a new version it went like
> >>> this: The new text made a new page, but the
> >>> new file went to the old
> >>
> >>snip
> >
> > Thanks for letting me know that I am not
> > alone. Do you know of an alternative to the
> > Cheese Shop?
>
> Surely the correct answer to this problem is to
> get the Cheese Shop fixed, not to migrate away
> from it? To whom (besides this list) have you
> communicated the problem, and with what
> results?

I emailed and emailed,  I got one response but 
nothing changed.

I suggest that the Cheese Shop also forward copies 
of help request to a site like this or similar. 
At least the sender knows that someone will read  
the email and help is on the way.

Also, my guess is that before these postings of 
the last few days, 65% of the people on this site 
never heard of The Cheese Shop,  Postings like 
these can only help The Cheese Shops.       

jim-on-linux

http://www.inqvista.com


>
> Remember that python.org is run by volunteers,
> but they are mostly highly capable volunteers.
> This is probably just a change situation that
> wasn't anticipated in the design (we all make
> mistakes).
>
> A simple change of email address could probably
> be achieved by tweaking the data for one or two
> individuals, and an automated solution should
> clearly be added as volumes build up.
>
> For now, how about a link that causes someone
> to receive email? I'd be surprised if this
> couldn't be used to handle low-volume changes
> with adequate security.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494
> 3119 Holden Web LLC/Ltd         
> http://www.holdenweb.com Skype: holdenweb      
> http://holdenweb.blogspot.com Recent Ramblings 
>    http://del.icio.us/steve.holden


From fredrik at pythonware.com  Tue Nov 14 16:43:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 22:43:04 +0100
Subject: BaseHTTPServer - getting POST parameters
In-Reply-To: <1163538035.160424.3470@e3g2000cwe.googlegroups.com>
References: <1163538035.160424.3470@e3g2000cwe.googlegroups.com>
Message-ID: <ejdd97$9g4$1@sea.gmane.org>

Vlad Dogaru wrote:

> After experimenting for a while, I am still not able to find where the
> POST data is in the BaseHTTPRequestHandler class. I am trying to write
> a very simple HTTP server for a project of mine and I need to get the
> POST data. Certainly I am missing something, as it is a comon task.

it's nowhere: you're supposed to read it from the socket via the "rfile" 
attribute.

</F>



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 10 20:09:39 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 11 Nov 2006 12:09:39 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2igj$826$1@sea.gmane.org>
	<4554D416.70408@hobbshouse.org> <ej2pa2$vpq$1@sea.gmane.org>
	<mailman.2070.1163193541.11739.python-list@python.org>
Message-ID: <pan.2006.11.11.01.09.34.138815@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 15:18:55 -0600, Michael Hobbs wrote:

> Ron Adam wrote:
>> It is also an outline form that frequently used in written languages.  Something 
>> python tries to do, is to be readable as if it were written in plain language 
>> where it is practical to do so.  So the colon/outline form makes a certain sense 
>> in that case as well.
>>   
> That is perhaps the most convincing argument that I've heard so far. 
> Indeed, I often find myself writing out colons when writing pseudo-code 
> out on paper. The reason, however, is usually because my indents don't 
> quite line up as perfectly on paper as they do in an editor. The colons 
> provide a form of backup separation for when my columns start to get 
> sloppy. (Natural language is actually filled with such redundancies in 
> order to compensate for sloppy handwriting.)

Er, natural language pre-dates handwriting by many tens or hundreds of
thousands of years. The redundancy of natural language has many reasons,
but compensating for sloppy handwriting is not one of them.


> This backup function 
> obviously isn't needed when a computer is taking care of the layout.

That word you use, "obviously", I don't think it means what you think it
means. There's nothing obvious about your conclusion to me.

while (this really long expression
    (which extends over multiple lines
    and contains many statements)
    some of which (like this one) contain
    nested bracketed terms such as (this
    expression here) but like all good 
    things) it eventually ends
    and we can get to the business
    of executing the while-block

Compare that to the version with a colon:

while (this really long expression
    (which extends over multiple lines
    and contains many statements)
    some of which (like this one) contain
    nested bracketed terms such as (this
    expression here) but like all good 
    things) it eventually ends:
    and we can get to the business
    of executing the while-block


Arguably, the parser might not find the first version any more difficult
than the second, but I know which one I'd rather read.

> My final argument against the colons is to simply try programming in 
> Ruby for a while and then come back to Python. I think you'll find that 
> programming without the colons just simply feels more "natural".

And maybe you're even correct. But one major reason of using the colon is
to make it easier for _inexperienced_ programmers. Your suggestion that
programming in Ruby for a while should be a prerequisite for making Python
easy to read is an interesting one, but not one that many people will
agree with. *wink*


-- 
Steven.



From ben at benfinney.id.au  Wed Nov 22 18:39:16 2006
From: ben at benfinney.id.au (Ben Finney)
Date: Thu, 23 Nov 2006 10:39:16 +1100
Subject: Python, WSGI, legacy web application
Message-ID: <87u00ruk4b.fsf@benfinney.id.au>

Howdy all,

I'm working on a web application that is starting to gain a lot of
back-end code written in Python. However, all the current interface
code is written in legacy PHP. I'd like to slowly introduce new
features as Python WSGI programs.

Is it possible to write a Python WSGI program that talks to a PHP
program as its "back end"? Where can I find out how to do this,
preferably with examples?

The ideal here is to keep all the existing code as is, but write
little or no new PHP code. Instead, iteratively change the interface,
replacing pieces of the monolithic legacy PHP interface with modular
WSGI programs over time.

-- 
 \       "I don't know anything about music. In my line you don't have |
  `\                          to."  -- Elvis Aaron Presley (1935-1977) |
_o__)                                                                  |
Ben Finney



From g.brandl-nospam at gmx.net  Mon Nov 13 15:35:29 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 13 Nov 2006 21:35:29 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.75.1163442239.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>
	<mailman.75.1163442239.32031.python-list@python.org>
Message-ID: <ejakun$v0r$1@news.albasani.net>

Michael Hobbs wrote:
> Georg Brandl wrote:
>> Ron Adam wrote:
>>   
>>> Michael Hobbs wrote:
>>>
>>>     
>>>> The same problem that is solved by not having to type parens around the 
>>>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>>>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>>>> months and got very comfortable with just typing the if conditional and 
>>>> hitting return, without any extra syntax. When I came back to Python, I 
>>>> found that I felt annoyed every time I typed the colon, since it 
>>>> obviously isn't required. The FAQ says that the colon increases 
>>>> readability, but I'm skeptical. The indentation seems to provide more 
>>>> than enough of a visual clue as to where the if conditional ends.
>>>>       
>>> I'm not sure why '\'s are required to do multi-line before the colon.
>>>     
>>
>> Special cases aren't special enough to break the rules.
>>
>> Georg
>>   
> 
> Eh? So multi-line strings are special enough to create a new syntax, 
> like, say, triple-quoted strings? Very long expressions aren't special 
> enough to create a special backslash token to continue the expression on 
> the next line? Multiple short expressions aren't special enough to 
> create a special semi-colon token to combine them on a single line?

For me, the above are not special cases in the sense that "leaving off the
line continuation character is allowed only in the line beginning a new suite"
is.

A similar special case would be, e.g., if triple quoted strings were
automatically dedented, but only if there's no text between the opening
quotes and the first linebreak. Etc. etc.

 > Programming language design is nothing more than deciding the best way
 > to deal with special cases. That even includes Lisp.

Of course. This is why the Zen includes more than one statement.

Georg


From zzf818 at gmail.com  Tue Nov  7 08:26:07 2006
From: zzf818 at gmail.com (kelin,zzf818@gmail.com)
Date: 7 Nov 2006 05:26:07 -0800
Subject: __init__ function problem
Message-ID: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>

Hi,

Today I read the following sentences, but I can not understand what
does the __init__ method of a class do?
__init__ is called immediately after an instance of the class is
created. It would be tempting but incorrect to call this the
constructor of the class. It's tempting, because it looks like a
constructor (by convention, __init__ is the first method defined for
the class), acts like one (it's the first piece of code executed in a
newly created instance of the class), and even sounds like one ("init"
certainly suggests a constructor?ish nature). Incorrect, because the
object has already been constructed by the time __init__ is called, and
you already have a valid reference to the new instance of the class.
But __init__ is the closest thing you're going to get to a constructor
in Python, and it fills much the same role.

It says the __init__ is called immediately after an instance of the
class is created. What dose "immediately" mean?
And what is difference between the init method and the constructor in
Java?

Thanks a lot!



From tactics40 at gmail.com  Sun Nov 26 17:22:58 2006
From: tactics40 at gmail.com (tac-tics)
Date: 26 Nov 2006 14:22:58 -0800
Subject: pdb question
In-Reply-To: <mailman.743.1164573685.32031.python-list@python.org>
References: <1164572933.131055.43940@14g2000cws.googlegroups.com>
	<mailman.743.1164573685.32031.python-list@python.org>
Message-ID: <1164579778.193520.62080@f16g2000cwb.googlegroups.com>

Strange. It seems to be working just fine now. Maybe I wasn't waiting
for all the symbols to be defined before setting my breakpoint.

On Nov 26, 2:41 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> tac-tics wrote:
> > In the Python debugger (pdb), how do you designate breakpoints at the
> > start of methods?
> > I've tried:
> > break methodName
> > break class.methodName
> > break object.methodName
>
> > but none of these seem to work. What is the trick?define "seem to work".
>
> the "className.methodName" and "object.methodName" forms seem to work
> just fine to me (assuming that the class or object has been defined, of
> course).
>
> if nothing else works, you can use the line or file:line syntax.
> 
> </F>



From brian at sweetapp.com  Thu Nov 23 13:49:08 2006
From: brian at sweetapp.com (Brian Quinlan)
Date: Thu, 23 Nov 2006 19:49:08 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <ek3uqa$8lm$1@sea.gmane.org>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
	<ek3uqa$8lm$1@sea.gmane.org>
Message-ID: <4565ED24.3050900@sweetapp.com>

Fredrik Lundh wrote:
> 4) [] and {} always create a new object every time they're evaluated.

Not quite. The empty tuple is cached:

 >>> a = ()
 >>> b = ()
 >>> a is b
True

Cheers,
Brian


From dursuncaglar at gmail.com  Fri Nov 10 05:40:03 2006
From: dursuncaglar at gmail.com (dursuncaglar at gmail.com)
Date: 10 Nov 2006 02:40:03 -0800
Subject: substring search without using built in utils
In-Reply-To: <mailman.1949.1163035784.11739.python-list@python.org>
References: <mailman.1949.1163035784.11739.python-list@python.org>
Message-ID: <1163155203.045875.185980@m7g2000cwm.googlegroups.com>



    My lecture Mustafa Ba?er give me the same homework.But u have to
check similar algorithm at c then you can manipulate the same functions
for python.Cause other languages (except C#, java etc.) does not have a
strong library as python.Or alternatively you can check the source
codes too see behind the function's code.



From bj_666 at gmx.net  Fri Nov 17 10:02:37 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 17 Nov 2006 16:02:37 +0100
Subject: function for allocating memory for string array
References: <1163772870.781423.161550@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.17.15.02.36.648691@gmx.net>

In <1163772870.781423.161550 at k70g2000cwa.googlegroups.com>, Sheldon wrote:

> Can someone tell me how to remove the conflicts here ?

What do you mean by conflicts?  I see a bunch of undeclared functions
here.  Just look at the compiler messages and fix the problems one by one.

> #include <stdlib>

Here is missing a ``.h`` suffix.

> static char*** Memory2DStr(int R, int C);
> static void MemoryFreeStr(int C, char*** array);
> 
> void main() {
> unsigned char ***arr_scenes=NULL;
> int R = 15;
> int C = 15;
> 
> arr_scenes = Memory2DStr(nscenes,2);

Where is `nscenes` coming from?  And you should pay attention how the
types are declared.  You assign `char ***` return value from
`Memory2DStr()` to `unsigned char ***` typed `arr_scenes`.

>   for (i = 0; i < C; i++) {
>     array[i] = calloc(R,sizeof(char*));
>     if(array == NULL) { // Memory for the Col

C++ comments are not allowed in ANSI C.  Some compilers understand them
but if you want to write portable code you should steer clear of them.

>       fprintf(stderr, "Failed to allocate memory\n");

The declaration of `fprintf()` lives in `stdio.h`.

Ciao,
	Marc 'BlackJack' Rintsch


From anrnsrisnotreqid at blueyonder.co.uk  Mon Nov  6 18:04:32 2006
From: anrnsrisnotreqid at blueyonder.co.uk (djc)
Date: Mon, 06 Nov 2006 23:04:32 GMT
Subject: simple way to un-nest (flatten?) list
In-Reply-To: <pan.2006.11.06.10.43.12.77229@REMOVE.THIS.cybersource.com.au>
References: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>
	<pan.2006.11.06.10.43.12.77229@REMOVE.THIS.cybersource.com.au>
Message-ID: <4cP3h.48258$r61.7630@text.news.blueyonder.co.uk>

George Sakkis wrote:
 > Meet itertools:
 >
 > from itertools import chain
 > names = set(chain(*r.itervalues()))
 > print [line for line in table if line[7] in names]

Steven D'Aprano wrote:
> Assuming you don't care what order the strings are in:
> 
> r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> result = sum(r.values(), ())
> 
> If you do care about the order:
> 
> r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> keys = r.keys()
> keys.sort()
> result = []
> for key in keys:
>     result.extend(r[key])
> result = tuple(result)

Thank you everybody.
As it is possible that the tuples will not always be the same word in 
variant cases
result = sum(r.values(), ())
  will do fine and is as simple as I suspected the answer would be.





-- 
djc


From chris.cavalaria at free.fr  Thu Nov  2 08:06:45 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 02 Nov 2006 14:06:45 +0100
Subject: other ways to check for <type 'function'>?
In-Reply-To: <slrnekjlva.rj5.sybrenUSE@schuimige.stuvel.eu>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
	<4549cf05$0$9363$426a74cc@news.free.fr>
	<slrnekjlva.rj5.sybrenUSE@schuimige.stuvel.eu>
Message-ID: <4549ed5c$0$30321$426a74cc@news.free.fr>

Sybren Stuvel a ?crit :
> Christophe enlightened us with:
>> I don't think it's a good idea because when you place a try catch
>> block around a function call, you'll catch any exception thrown by
>> the function itself and not only the "cannot be called" exception.
> 
> That depends on the exception you're catching, doesn't it?

And what if the function has an error and calls a non callable object ?


From sturlamolden at yahoo.no  Wed Nov  8 12:41:15 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 8 Nov 2006 09:41:15 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <1163007675.919803.158010@m7g2000cwm.googlegroups.com>

robert wrote:

> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.

Threading is not the best way to exploit multiprocessors in this
context. Threads are not the preferred way of exploiting multiple
processors in scientific computing.

here are a few thoughts on the matter:

1. SciPy uses ATLAS/BLAS and LAPACK. You can compile these libraries
for SMPs. The same goes for FFTW, vendor optimized math kernels, etc.
If most of the CPU time is spent inside these numeric libraries, using
multi-processor versions of these libraries are a much better strategy.

2. The number of CPUs are not the only speed limiting factor on an SMP.
Use of cache and prefetching are just as important. That can make
multi-processor aware numeric libraries a lot more efficient than
manual multi-threading.

3. One often uses cluster architectures (e.g. Beowulf) instead of SMPs
for scientific computing. MPI works on SMP and clusters. Threads only
work on SMPs.

4. Fortran compilers can recognize parallel array statements in
Fortran90/95 and exploit multiple processors on an SMP automatically.
NumPy should be able to to the same when it matures. E.g. if you make a
statement like "arr[1,::] = arr[2,::] * arr[3,::]", then this statement
could be evaluated in parallel on multiple CPUs, without any
multi-threading on your part. Since the order in which the
multiplications are performed are of no significance, the work can just
as well be spread out to multiple processors in an SMP or a cluster.
NumPy is still immature, but Fortran compilers have done this at least
two decades.

5. Streaming SIMD extensions (SSE) and similar opcodes: Are you aware
that Pentium III (and newer) processors are pipe-lined to do four
floating-point operations in parallel? You could theoretically
quadruple your flops using the SSE registers, using no threading at
all. (The actual improvement is slightly less, due to some extra
book-keeping required to get the data in and out of the SSE registers.)
Again this requires modifications inside NumPy, not multi-threading.

> If not, would it be an idea to create such thing in the Python std libs to make Python multi-processor-ready. I guess Python will always have a GIL - otherwise it would loose lots of comfort in threaded programming

I would say that the GIL actually has very little effect of Python's
potential in high-performance numeric and scientific computing. It all
depends on the libraries, not on Python per se. Threading is for making
certain tasks more comfortable to write, not so much for computational
speed.



From vasudevram at gmail.com  Sat Nov 18 11:11:39 2006
From: vasudevram at gmail.com (vasudevram)
Date: 18 Nov 2006 08:11:39 -0800
Subject: Has anyone generated Open Office Calc XML files from python
In-Reply-To: <1163702075.010225.204970@m73g2000cwd.googlegroups.com>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
	<1163700443.697061.47130@e3g2000cwe.googlegroups.com>
	<1163700905.899704.81920@e3g2000cwe.googlegroups.com>
	<1163702075.010225.204970@m73g2000cwd.googlegroups.com>
Message-ID: <1163866299.942857.56100@m73g2000cwd.googlegroups.com>


vj wrote:
> > Isn't generating CSV output suitable to your needs?
> > Python's CSV module makes that very simple - unless you want to include
> > images, etc. in the XLS file?
>
> You cannot create multiple worksheets using this method, or apply any
> other form of formatting. 
> 
> VJ

Ok, got it.



From aboudouvas at panafonet.gr  Wed Nov 22 04:40:10 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 22 Nov 2006 01:40:10 -0800
Subject: Python visual IDE
Message-ID: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>


Hi to all,

i am not sure if this question really belongs here but anyway, here it
goes: I have seen a lot of IDEs for Python, a lot of good stuff but
actually none of them has what, for example, Visual Studio has: a
Visual Editor (with the  ability to place controls on forms etc etc),
or RAD

I know that there is Glade but does anybody knows of some product, or
an ongoing effort to this direction so i can have a look at ?

Coming from Windows and vs.net world, i think the only missing point
here is the integration of the Pyrthon with a RAD IDE...

Thanks a lot and i apologize if this isn't the correct place for this
question...


Kikapu



From leonhard.vogt at gmx.ch  Tue Nov  7 16:33:00 2006
From: leonhard.vogt at gmx.ch (Leonhard Vogt)
Date: Tue, 07 Nov 2006 22:33:00 +0100
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov  7)
In-Reply-To: <4550f7b9$0$14445$c3e8da3@news.astraweb.com>
References: <eiqr89$20d$1@lairds.us>
	<4550f7b9$0$14445$c3e8da3@news.astraweb.com>
Message-ID: <4550fb75$1_6@news.bluewin.ch>

John Salerno schrieb:
> Cameron Laird wrote:
> 
>>     Fredrik Lundh collects pyidioms:
>>     http://effbot.org/zone/python-lists.htm
> 
> Not working?

Try
http://effbot.org/zone/python-list.htm

Leonhard


From tleeuwenburg at gmail.com  Thu Nov  2 23:14:30 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 2 Nov 2006 20:14:30 -0800
Subject: The Python Journal
In-Reply-To: <1162475367.820769.169600@h54g2000cwb.googlegroups.com>
References: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
	<1162474966.333979.31610@i42g2000cwa.googlegroups.com>
	<1162475367.820769.169600@h54g2000cwb.googlegroups.com>
Message-ID: <1162527270.731091.150920@m7g2000cwm.googlegroups.com>

Thanks all for your comments. A number of people have mentioned the
click-difficulty of getting to the journal. I'll work with the
publisher to make that happen, otherwise I may be able to manually edit
the front page to include a link to the latest version.

It's great to have people visiting already. I'll respond to the other
specific comments shortly, but just thought I'd say, "we're
listening!".

The python error is due to my inability to typeset python well within
OpenOffice. I used "enscript" and some helper tools to create the
graphics, but have since discovered that a cut-and-paste from Eclipse
does a *much* better job. Expect better code snippets from the next
edition.

Cheers,
-T (editor-in-chief)



From gregg at lind-beil.net  Fri Nov 17 12:54:44 2006
From: gregg at lind-beil.net (Gregg Lind)
Date: Fri, 17 Nov 2006 11:54:44 -0600
Subject: Slicing / subsetting list in arbitrary fashion
References: 455DEA24.1060906@lind-beil.net
Message-ID: <455DF764.50105@lind-beil.net>

I wish something like this was part of the standard python installation, 
and didn't require one to use Numpy or Numarray.  This sort of list 
subsetting is useful in many, many contexts. 



From inq1ltd at verizon.net  Fri Nov 24 13:20:32 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 24 Nov 2006 13:20:32 -0500
Subject: Access to variable from external imported module
In-Reply-To: <200611241301.05557.inq1ltd@verizon.net>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<1164357005.703346.35320@45g2000cws.googlegroups.com>
	<200611241301.05557.inq1ltd@verizon.net>
Message-ID: <200611241320.32735.inq1ltd@verizon.net>

On Friday 24 November 2006 13:01, jim-on-linux 
wrote:
> On Friday 24 November 2006 03:30, John Machin
>
> wrote:
> > jim-on-linux wrote:
> > > GinTon,
> > >
> > > I think this is what you want.
> > >
> > >
> > > class Kdoi:
> >
> > Is that a typo?
>
>        No, it's a style. life seems to be
> easier to me if one is consistent, all my
> classes begin with K.

Sorry, Kdoi should be Kod



>
> > >    def __init__(self) :
> > >        self.Fdo()
> >
> > What is all this K and F stuff?
>
>    It's my style. life seems to be easier  to
> me if one is consistent all my function begin
> with F.
>
> I started doing things like this when the only
> way to debug was to read each line of code and
> try to figgure out if it was the problem.
> They are my personal sign posts.
>
> > >    def Fdo(self):
> > >
> > >
> > >      searchterm = 'help'
> > >      print searchterm     #local
> > >
> > >      self.searchterm = searchterm
> > >      print self.searchterm #used inside the
> > > class
> > >
> > >      Kdo.searchterm = searchterm   #<<<<
> > >      print Kdo.searchterm #used outside the
> > > class Kdomore()
the line above should be Kdomore(), not class 
Kdomore() (For the technocrats)
> > >
> > >
> > >
> > > class Kdomore(Kdo):
> > >      def __init__(self) :
> > >          self.Fdomore()
> > >
> > >      def Fdomore(self):
> > >          searchterm =  Kdo.searchterm   #
> > > <<<< print searchterm
> >
> > It's not apparent what the print statements
> > are for -- are they part of an attempt to
> > debug your code?
>
> print shows the results wherever a print
> statement turns up the results = 'help' .
> I didn't run the code, and it has it has a
> coding error but if removed, the results should
> be;
>
>    searchterm = 'help'
>    self.searchterm = 'help'
>    Kdo.searchterm = 'help'
>
>    Sound silly but many people have trouble
> with getting a variable from here to there in
> their code. This shows that it can be done
>
> > What gives you the idea that this is what the
> > OP wants or needs?
>
> If I remember right,  he refrased  his first
> question and asked a second one.
> Sometimes people don't take the time to write
> correctly, the questions that are really in
> their mind. So I guessed.  If Im wrong, he will
> ignore it.  If I'm right, he will use it.
>
> Also, I have found that other will latch on to
> the ideas presented  in these email responses.
> And they will use them, even though the
> response was not exactly what the original
> emailer wanted.
>
> And, I sometimes I do use print statements to
> debug, I have used other ways but on linux, I
> prefer a print statement.
>
 jim-on-linux
 http://www.inqvista.com


From larry.bates at websafe.com  Fri Nov  3 16:35:14 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Nov 2006 15:35:14 -0600
Subject: Having trouble with file modes
In-Reply-To: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
References: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
Message-ID: <454BB612.3090306@websafe.com>

Don't do that.  Do something like renaming the old file
to .bak (or .aside or something) and then create the entire file
by opening it with 'w'.

-Larry


From fredrik at pythonware.com  Tue Nov 14 05:42:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 11:42:36 +0100
Subject: Seeking assistance - string processing.
In-Reply-To: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
Message-ID: <ejc6iq$k1g$1@sea.gmane.org>

billpaterson2006 at googlemail.com wrote:

> I am trying to work out how to make it find a string like this "==="
> and when it has found it, I want it to add "===" to the end of the
> line.

how about

     if line.startswith("==="):
         line = line + "==="

or

     if "===" in line: # anywhere
         line = line + "==="

?

>         if line.rfind("--------------------") is not -1:
>             new = line.replace("--------------------","----")

it's not an error to use replace on a string that doesn't contain the 
pattern, so that rfind is rather unnecessary.

(and for cases where you need to look first, searching from the left
is usually faster than searching backwards; use "pattern in line" or 
"line.find(pattern)" instead of rfind.

</F>



From Roberto.Bonvallet at cern.ch  Fri Nov 10 12:02:52 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Fri, 10 Nov 2006 17:02:52 +0000 (UTC)
Subject: SyntaxError: Invalid Syntax.
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
Message-ID: <ej2bbs$ve6$1@cernne03.cern.ch>

ronrsr wrote:
>   return =  MySQLdb.connect (host = "db91x.xxxx.com",
>                           user = "xxxx",
>                            passwd = "xxxxx",
>                        db = "homebase_zingers"
>                           );

return is a reserved keyword.  You cannot have a variable with that name.

-- 
Roberto Bonvallet


From steve at holdenweb.com  Fri Nov  3 14:27:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Nov 2006 19:27:53 +0000
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <o9mdnZQHN4lE99bYnZ2dnUVZ_q6dnZ2d@comcast.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
	<o9mdnZQHN4lE99bYnZ2dnUVZ_q6dnZ2d@comcast.com>
Message-ID: <eig55i$gc8$1@sea.gmane.org>

Larry Bates wrote:
> Michael B. Trausch wrote:
> 
>>I was wondering if anyone has had any experience with this.  Someone I
>>know is trying to move away from Microsoft Works, and I am trying to
>>look into a solution that would convert their data in a lossless fashion
>>to a more modern format.  The database has more than 65K rows, so
>>converting it to be an Excel spreadsheet, would, AFAIK, not be an option.
[...]
> MS ships ODBC interface to xBase databases in all versions of Windows.
> You don't need Access.  Just create DSN to your exported dBase database
> and MS Word, MS Excel, and any other ODBC aware product

Including, presumably, mx.ODBC in Python, which gives the most 
attractive possibilities for output.

  can read the
> data.  If the data size is large or if you want to move to server, you
> can do that later.
> 
regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From john106henry at hotmail.com  Thu Nov 30 15:38:56 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 12:38:56 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <mailman.897.1164918835.32031.python-list@python.org>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<mailman.896.1164917235.32031.python-list@python.org>
	<1164917869.978435.63370@f1g2000cwa.googlegroups.com>
	<mailman.897.1164918835.32031.python-list@python.org>
Message-ID: <1164919135.876176.82870@h54g2000cwb.googlegroups.com>


Thomas Ploch wrote:
>
> John Henry schrieb:
> > > Thomas Ploch wrote:
> > > <snip>
> >> >> I had a little bit of fun while writing this:
> >> >>
> >> >> itemList = (a,b,c1,c2,c3,d1,d2,d3,d4,d5) and
> >> >> itemList2 = (a1,a2,a3,b,c,d1,d2,d3,d4,d5) the next time.
> >> >>
> > >
> > > Huh?  What's a,b,....d5?
> > >
>
> Can be any object, as you had in your example in your mail:
> 

Oh, sorry.



From johnjsal at NOSPAMgmail.com  Wed Nov  8 10:51:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 10:51:58 -0500
Subject: sqlite query not working
In-Reply-To: <1162935448.060121.258780@m7g2000cwm.googlegroups.com>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>
	<mailman.1854.1162933832.11739.python-list@python.org>
	<4550f7a5$0$14445$c3e8da3@news.astraweb.com>
	<mailman.1855.1162934802.11739.python-list@python.org>
	<4550fa9f$0$17710$c3e8da3@news.astraweb.com>
	<1162935448.060121.258780@m7g2000cwm.googlegroups.com>
Message-ID: <4551fd12$0$7047$c3e8da3@news.astraweb.com>

BartlebyScrivener wrote:
> John Salerno wrote:
> 
>>> Ah well, I'm sure there was *something* different
> 
> Are you sure that it's not you were doing SELECT before, as opposed to
> INSERT?

Perhaps. It might have been that I used the INSERT statement on the 
sqlite command line, then used SELECT in Python, and got it all mixed up 
in my head. :)


From ocollioud at gmail.com  Wed Nov 29 07:41:47 2006
From: ocollioud at gmail.com (olive)
Date: 29 Nov 2006 04:41:47 -0800
Subject: Processing Solid Edge objects
In-Reply-To: <1164803264.351803.204720@h54g2000cwb.googlegroups.com>
References: <1164803264.351803.204720@h54g2000cwb.googlegroups.com>
Message-ID: <1164804107.162420.99730@j44g2000cwa.googlegroups.com>

It would help if you could give an exemple of .par and .asm file.

Is it human readable, XML ... ?

Is there any other import/export file format provided ?

Maria R a ?crit :

> I consider using Python to process Solid Edge .par .asm etc objects.
> Solid Edge provides a pretty rich documentation and tutorials.
> Still, when trying it out, using PyWin32, I get somewhat frustrated.
>
> So, I hope for someone out there to be willing to share experiences.
>
> The objective is to automate generation of customer specific machine
> elements from project spec's.
> In particular, we wish to be able to use .par files as templates and,
> by
> taking a copy and changing attribute values, instantiate components
> to be used in an assembly.
> The end result shall be a complete construction structure from which,
> among many things, customer doc's drawings and Bill Of Materials are to
> be
> extracted.
> //M



From trentm at activestate.com  Thu Nov  2 15:21:00 2006
From: trentm at activestate.com (Trent Mick)
Date: Thu, 02 Nov 2006 12:21:00 -0800
Subject: uninstall and Windows file associations
In-Reply-To: <1162414083.490714.313860@e3g2000cwe.googlegroups.com>
References: <1162414083.490714.313860@e3g2000cwe.googlegroups.com>
Message-ID: <454A532C.8080404@activestate.com>

Roger Miller wrote:
> When I installed Python 2.5 (on Windows XP) I left 2.4 in place "just
> in case". Today I decided to remove it. However after doing so (from
> the control panel) I found that Windows no longer knows about the
> Python file types and associations. Is this behavior expected, or was
> there something wrong with my installation? Is there a way to restore
> the file associations, short of reinstalling 2.5 or manually editing
> them?

ActivePython handles that case by providing a "Repair" functionality in the 
installer. I'm not sure if the python.org Windows installer has that 
functionality (it probably does). Just try invoking the .msi file again.

And, as Neil said, you can just reinstall.

Trent

-- 
Trent Mick
trentm at activestate.com


From eduardo.padoan at gmail.com  Wed Nov 29 11:45:38 2006
From: eduardo.padoan at gmail.com (eduardo.padoan at gmail.com)
Date: 29 Nov 2006 08:45:38 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
Message-ID: <1164818738.403393.112900@j44g2000cwa.googlegroups.com>


Leandro Ardissone wrote:
> Hi,
>
> I want to know what type is a variable.
> For example, I get the contents of an xml but some content is a list or
> a string, and I need to know what type it is.

You should try to treat it as a list, catch the exceptions raise when
it is a string (problably ValueError, TypeError ou Attribute error,
depends on what are you doing), and then treat it as a string. This is
the BAFP (better ask for forgiveness than permission) style, and is
more accepted in duck-typing languages like Python then LBYL (look
before you leep) style.



From gagsl-py at yahoo.com.ar  Thu Nov  2 16:16:35 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Nov 2006 18:16:35 -0300
Subject: __doc__ in compiled script
In-Reply-To: <eidm6p$sdk$1@sea.gmane.org>
References: <7.0.1.0.0.20061102172803.05831948@softlab.com.ar>
	<eidm6p$sdk$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061102180858.01d7af38@yahoo.com.ar>

At Thursday 2/11/2006 17:59, Fredrik Lundh wrote:

> > I have a script starting with a docstring. After compiling it with
> > compile(), is there any way I could get the docstring? __doc__ on the
> > code object doesn't work.
>  >
> > I can't use __import__ because the script has top-level statements that
> > have to be executed only once (it's not supposed to be used as a module).
>
>(or you can just look in co.co_consts[0] and hope for the best)

I'll use co.co_consts[0] and check it's a string - it may fail when 
there is no docstring and the first const referenced is a string, but 
it's good enough for me. Thanks!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ironpythonster at gmail.com  Mon Nov  6 22:27:46 2006
From: ironpythonster at gmail.com (Kevien Lee)
Date: 6 Nov 2006 19:27:46 -0800
Subject: Is there any python lib for calling CVS api?
In-Reply-To: <1162810509.523809.158260@k70g2000cwa.googlegroups.com>
References: <1162804318.492725.245410@f16g2000cwb.googlegroups.com>
	<1162810509.523809.158260@k70g2000cwa.googlegroups.com>
Message-ID: <1162870066.351009.214330@k70g2000cwa.googlegroups.com>

Paul :

Thanks ,but the viewvc lib so simple useable for python:(

Paul Boddie wrote:
> ironpythonster at gmail.com wrote:
> > Hi everyone, this should be a quick question.  I'm writing some scripts
> > to take some file and move them into a CVS repository, but it's pretty
> > slow, because it uses system calls to execute the CVS commands.
>
> [...]
>
> > anyway, if anyone knows of a useful module, I'd love to hear about it.
>
> You might get some ideas from ViewVC if you're accessing the repository
> directly:
>
> http://www.viewvc.org/
>
> There may be scripts out there which import data from various other
> revision control systems into CVS, although the focus these days seems
> to be on *exporting* data from CVS and putting it into things like
> Subversion, Bazaar, Mercurial and so on, but I believe the scripts for
> the latter two are Python programs and may also provide some
> inspiration.
> 
> Paul



From cvanarsdall at mvista.com  Wed Nov  8 16:20:26 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 08 Nov 2006 13:20:26 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <17746.17512.702626.550949@montanaro.dyndns.org>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
	<45522C3E.3050705@mvista.com>
	<17746.17512.702626.550949@montanaro.dyndns.org>
Message-ID: <45524A1A.5090407@mvista.com>

skip at pobox.com wrote:
>     Carl> You are comparing interviews to usenet.  I somehow see a
>     Carl> disconnect.  I don't think many people are going to go to a
>     Carl> potential employer and say "hey fuck face, how the fuck are ya?"
>     ...
>     Carl> Although you mentioned impressing people etc, is it really
>     Carl> important to impress people here by watching your P's and Q's?
>     Carl> What impresses me here is someone's command of the language, I
>     Carl> could really give a rats ass how they choose to disseminate their
>     Carl> expertise.
>
> If recent news reports are to be believed (*) it would appear that companies
> are starting to check out prospective employees online.  Granted, most of
> the stuff I've seen or heard relates to use of social networking sites like
> Facebook and MySpace, but I'm sure savvy employers looking for programming
> expertise would know to check out Usenet newsgroups and/or relevant mailing
> lists.  Anything you post is fair game though.  Also, "command of the
> language" can extend to the spoken/written word.
>
> Skip
>
> (*) http://www.nytimes.com/2006/06/11/us/11recruit.html?ei=5090&en=ddfbe1e3b386090b&ex=1307678400
>   
Whereas you are right about employers looking online (its happened to me 
too), that should remain the issue of the poster of those horrible 
things.  It shouldn't be the issue of "offended code monkey #12". 

As for your statement about how "command of the language" (in reference 
to python) extends to written/spoken word, I don't quite understand what 
you are saying.  Yes, there are skills in being able to explain code or 
concepts to someone, but adjective choice (at least in the way I had 
used it) hardly hinders one's ability to communicate python ideas and 
code.  Can you explain how the use of profanity affects one's ability to 
code in python or explain their code?  The only thing I really can think 
of is that someone gets over sensitive and starts complaining instead of 
taking in the deeper meaning of the "enhanced" statement. 

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From fredrik at pythonware.com  Sat Nov 18 11:29:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 17:29:08 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<ejmm4d$guk$1@sea.gmane.org>
	<894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>
Message-ID: <ejncck$9eg$1@sea.gmane.org>

Chas Emerick wrote:

>> and keep patting our-
>> selves on the back, while the rest of the world is busy routing around
>> us, switching to well-understood XML subsets or other serialization
>> formats, simpler and more flexible data models, simpler API:s, and
>> more robust code.  and Python ;-)
> 
> That's flatly unrealistic.  If you'll remember, I'm not one of "those  
> people" that are specification-driven -- I hadn't even *heard* of  
> Infoset until earlier this week!

The rant wasn't directed at you or anyone special, but I don't really 
think you got the point of it either.  Which is a bit strange, because 
it sounded like you *were* working on extracting information from messy 
documents, so the "it's about the data, dammit" way of thinking 
shouldn't be news to you.

And the routing around is not unrealistic, it's is a *fact*; JSON and 
POX are killing the full XML/Schema/SOAP stack for communication, XHTML 
is pretty much dead as a wire format, people are apologizing in public 
for their use of SOAP, AJAX is quickly turning into AJAJ, few people 
care about the more obscure details of the XML 1.0 standard (when did 
you last see a conditional section? or even a DTD?), dealing with huge 
XML data sets is still extremely hard compared to just uploading the 
darn thing to a database and doing the crunching in SQL, and nobody uses 
XML 1.1 for anything.

Practicality beats purity, and the Internet routes around damage, every 
single time.

 > overwhelming majority of the developers out there care for nothing
 > but the serialization, simply because that's how one plays nicely
 > with others.

The problem is if you only stare at the serialization, your code *won't* 
play nicely with others.  At the serialization level, it's easy to think 
that CDATA sections are different from other text, that character 
references are different from ordinary characters, that you should 
somehow be able to distinguish between <tag></tag> and <tag/>, that 
namespace prefixes are more important than the namespace URI, that an 
&nbsp; in an XHTML-style stream is different from a U+00A0 character in 
memory, and so on.  In my experience, serialization-only thinking (at 
the receiving end) is the single most common cause for interoperability 
problems when it comes to general XML interchange.

But when you focus on the data model, and treat the serialization as an 
implementation detail, to be addressed by a library written by someone 
who's actually read the specifications a few more times than you have, 
all those problems tend to just go away.  Things just work.

And in practice, of course, most software engineers understand this, and 
care about this.  After all, good software engineering is about 
abstractions and decoupling and designing things so you can focus on one 
part of the problem at a time.  And about making your customer happy, 
and having fun while doing that.  Not staying up all night to look for 
an obscure interoperability problem that you finally discover is caused 
by someone using a CDATA section where you expected a character 
reference, in 0.1% of all production records, but in none of the files 
in your test data set.

(By the way, did ET fail to *read* your XML documents?  I thought your 
complaint was that it didn't put the things it read in a place where you 
expected them to be, and that you didn't have time to learn how to deal 
with that because you had more important things to do, at the time?)

</F>



From fredrik at pythonware.com  Sun Nov 19 09:55:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 15:55:27 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <1163941421.235619.150260@f16g2000cwb.googlegroups.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<mailman.408.1163844581.32031.python-list@python.org>
	<1163941421.235619.150260@f16g2000cwb.googlegroups.com>
Message-ID: <ejpr8v$54p$1@sea.gmane.org>

Uche Ogbuji wrote:

 > The fact that the XML Infoset is hardly used outside W3C XML Schema,
 > and that the XPath data model is far more common, and that focus on
 > the serialization is even more common than that is a matter of
 > everyday practicality.

everyday interoperability problems, that is.  yesterday, someone 
reported a bug in Python's xml.dom because he couldn't get it to 
serialize the string "&nbsp;" as "&nbsp;".  earlier today, someone
asked how to work around an XML parser that didn't understand
namespace prefixes.

> And oh by the way, this thread is all about *your* customer's
> complaining.

from what I can tell, it was *your* customer posting FUD about a 
different library, not my customer asking for help with a specific 
problem.  this is free software; people who use a piece of software 
count a *lot* more than people who don't want to use it.

 > This is not one fo those times, so this is probably where I get off.

I'll be looking forward to your next O'Reilly article.

</F>



From deets at nospam.web.de  Mon Nov  6 08:11:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Nov 2006 14:11:25 +0100
Subject: Projecting MUD maps
References: <mailman.1793.1162765972.11739.python-list@python.org>
	<4r79c5Fptb28U1@uni-berlin.de>
	<mailman.1804.1162815961.11739.python-list@python.org>
Message-ID: <4r8qjtFpkllgU2@uni-berlin.de>

BJ?rn Lindqvist wrote:

> On 11/5/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
>> BJ?rn Lindqvist schrieb:
>> > Hello, I'm looking for an algorithm to project "MUD maps" such as the
>> > following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg
>> >
>> > MUD:s consists of rooms, each rooms has up to four orthogonal edges
>> > (north, east, west and south) that connects it to another room. So it
>> > is very easy to model a MUD as a directed graph. But projecting the
>> > graph on a surface is very complicated. For example, Room A:s North
>> > edge may connect it to Room B. But Room B:s South edge may connect it
>> > to Room C. Or another tricky example: Room A:s East edge connects it
>> > to Room B, whose East edge connect it to Room C, whose North edge
>> > connects it to Room D, whose West edge connects it to Room E, whose
>> > South edge connects it to Room A. In that example, there would be a
>> > "hole" between Room D and E.
>>
>>
>> try graphviz. You can also annotate some compass information ther, I
>> guess it should make for a better placement.
> 
> Sorry, I think everyone misunderstood what my problem is. Which is not
> very strange since I see now that I didn't explain it very well.
> 
> In the code below, I have created a simple Room class. It has up to
> four edges; north, east, west and south. The Room class also has the
> method get_projection() which recursively traverses through all
> reachable rooms in the graphs and gives them x,y coordinates and
> returns a dict containing x,y-coordinates and rooms. The function
> project_dict() simply plots the dict on stdout.
> 
> The main() function demonstrates how a map consisting of nine rooms
> should be plotted. All well so far. But if there had been an east-west
> edge from G to I, then that edge would have overlapped C:s position.
> That would have been wrong and I want the algorithm in
> get_projection() to detect such overlaps and automatically fix them.
> In this case, the fix would have been to add 2 to G and I:s
> y-coordinate. Then the east-west edge from G to I wouldn't overlap any
> room.
> 
> So I wonder if there is any algorithm that can do what I'm asking for?

It depends - it is complicated and very sophisticated and generally
considered a hard, even unsolvable problem. However, a good general
solution is written in the graphviz toolkit. Which is the reason I
suggested it.

But there is no cookbook-algorithm that will produce perfect MUD-maps. For
such a beast, you have to cough up one on your own, with things like
constraint solvers and the like. Certainly over _my_ head, at least without
deep studies of planar graph representation problems.

Diez


From srikrishnamohan at gmail.com  Wed Nov 15 07:29:57 2006
From: srikrishnamohan at gmail.com (km)
Date: Wed, 15 Nov 2006 17:59:57 +0530
Subject: biopython SProt
Message-ID: <f4cc03640611150429v7f05e10chbd2457175dbeee70@mail.gmail.com>

Hi all,

Biopython's SProt module doesnt seem to work with current Uniprot KB .
do anyone have a parser to read Uniprot format files ?

regards,
KM
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From g.brandl-nospam at gmx.net  Thu Nov  9 17:57:51 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 09 Nov 2006 23:57:51 +0100
Subject: Simple question to split
In-Reply-To: <4rhq0jFrneqhU3@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
	<4rhpvgFrneqhU2@mid.uni-berlin.de>
	<4rhq0jFrneqhU3@mid.uni-berlin.de>
Message-ID: <ej0bpf$gp9$1@news.albasani.net>

Diez B. Roggisch schrieb:
> Diez B. Roggisch schrieb:
>> Matthias Winterland schrieb:
>>> Hi,
>>>
>>> I have a simple question. When I read in a string like:
>>> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
>>> single split-call?
>> 
>> Nope. But you could replace the commas with spaces, and then split.
> 
> Or use re.split....

And not forget to map it through int() afterwards.

Georg


From rdiaz02 at gmail.com  Sat Nov  4 13:48:06 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sat, 4 Nov 2006 19:48:06 +0100
Subject: PySchool - Online Python Web Framework Workshop.
In-Reply-To: <1162651399.648891.31580@i42g2000cwa.googlegroups.com>
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
	<agZ2h.4143$9v5.1633@newssvr29.news.prodigy.net>
	<1162651399.648891.31580@i42g2000cwa.googlegroups.com>
Message-ID: <624934630611041048l65b501ebt631e7c040501830e@mail.gmail.com>

Dear Rob,

On 4 Nov 2006 06:43:19 -0800, RobJ <bobjohnson11 at gmail.com> wrote:
>
> Thanks James and Steve for the feedback I have made the appropriate
> changes and republished the survey at the following URL:
>
> http://killersurvey.com/answer_survey.php?id=490
>


Thanks for the update. However, a whole bunch of Linux distributions
are missing. For instance, I think that both Debian and Gentoo have a
large enough user base to deserve an explicit place in that list. And
I'd definitely add a way to list your very own distro, if not among
the listed, like you do in q. 3.

Best,

R.

> Rob J
>
>
>
> James Stroud wrote:
> > RobJ wrote:
> > > Hi! My Name is Rob Johnson and I am a graduate student at The Richard
> > > Stockton College of NJ. To make a long story short, I'm working on my
> > > Masters project in the MAIT program (Masters of Arts in Instructional
> > > Technology). I have written a proposal to put together a free on-line
> > > Python web framework workshop. The workshop will be geared to help
> > > people new to Python web frameworks. I am asking for the community's
> > > assistance to help me get this project off the ground. As part of my
> > > project, I am conducting a survey for people who are interested in
> > > learning more about python web frameworks.  The survey is located at
> > > http://killersurvey.com/answer_survey.php?id=479. I have also started a
> > > blog about this experience in order to let people know what I'm doing
> > > (http://pyschool.blogspot.com/). If you have a few minutes, please take
> > > a couple of minutes to take the quick survey. The survey is anonymous
> > > and the information will be used for statistics for my project. Also,
> > > any constructive feedback or suggestions that you can give me would be
> > > gladly appreciated.
> > >
> > > Thanks
> > >
> > > Rob J
> > >
> > Q9 should be "check all that apply" or otherwise qualified with "primarily".
> >
> > Q10 is missing other types of broadband such as what one might find at
> > school, and also have the option of multiple selections.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


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


From walterbyrd at iname.com  Wed Nov 15 15:54:55 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 12:54:55 -0800
Subject: Will GPL Java eat into Python marketshare?
Message-ID: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>

Some think it will.

Up untill now, Java has never been standard across different versions
of Linux and Unix. Some think that is one reason that some developers
have avoided Java in favor of Python. Now that Java has been GPL'd that
might change.

IMO: it won't make much difference. But I don't really know.



From robert.kern at gmail.com  Thu Nov  9 17:28:44 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 09 Nov 2006 16:28:44 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <45539325.3090304@tim.thechases.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<45539325.3090304@tim.thechases.com>
Message-ID: <ej0a36$3ku$1@sea.gmane.org>

Tim Chase wrote:
> A few arbitrary warts per-dictum of BDFL are fine though...it 
> still looks much cleaner compared to PHP & Perl ;-)

Well, it's neither arbitrary nor simply the preference of the BFDL. The ABC
project actually did empirical experiments with programmers to find that code
comprehension improved by adding the colon.

Here's a post from Uncle Timmy mentioning it:

http://groups.google.com/group/comp.lang.python/browse_frm/thread/525480d0caa61b7f/8d568e684d653003?lnk=st&q=group%3Acomp.lang.python+ABC+colon+experiment&rnum=2#8d568e684d653003

Unfortunately, my Google-fu has not located an actual paper. It might be in here
somewhere:

http://homepages.cwi.nl/~steven/abc/publications.html

-- 
Robert Kern

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



From sjmachin at lexicon.net  Fri Nov 17 06:19:40 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 03:19:40 -0800
Subject: A question on Encoding and Decoding.
In-Reply-To: <ejk2a1$1mf$2@wake.carmen.se>
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>
	<mailman.147.1163514990.32031.python-list@python.org>
	<1163584122.966665.149360@k70g2000cwa.googlegroups.com>
	<ejk2a1$1mf$2@wake.carmen.se>
Message-ID: <1163762380.380272.221440@e3g2000cwe.googlegroups.com>



On Nov 17, 9:18 pm, Johan von Boisman <do-not-re... at by-mail.com> wrote:
> I missed the beginning of this thread, but why not write
>
> s = u"???????"
>
> Is there ever a reason _not_ to exclusively use the unicode stringtype
> throughout your Python program? (of course you may need to encode/decode
> when interfacing with the world outside your program)
>

Please consider going back and finding the beginning of the thread.

Cheers,
John



From python.list at tim.thechases.com  Thu Nov 16 13:13:02 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 16 Nov 2006 12:13:02 -0600
Subject: Python v PHP: fair comparison?
In-Reply-To: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>
References: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>
Message-ID: <455CAA2E.5010708@tim.thechases.com>

Demel, Jeff wrote:
> Walterbyrd wrote:
>> Okay, where can I get Python and Apache 2.X for $10 a year?
> 
> Webfaction.com

Um, I think you're off by an order of magnitude.  Walterbyrd 
asked about $10/*year* and webfaction.com charges $7.50/*month*. 
    Well, I suppose if one only needed one and a third months of 
hosting during the course of the year, it might do for ya. ;-)

I can't say I've come across any hosting places that serve up PHP 
for $10/yr either...the closest I've found is about $3.50/mo 
(which also provides Python CGI).

-tkc








From sittner at lkb.ens.fr  Mon Nov  6 17:06:18 2006
From: sittner at lkb.ens.fr (sittner at lkb.ens.fr)
Date: Mon, 6 Nov 2006 23:06:18 +0100 (CET)
Subject: sound processing modules in python - anyone?
In-Reply-To: <mailman.4783.1162830903.11738.python-list@python.org>
References: <mailman.4783.1162830903.11738.python-list@python.org>
Message-ID: <43930.81.67.23.46.1162850778.squirrel@mailgate.phys.ens.fr>

Hi everyone,
I'm looking for a module for sound processing (manipulating sound objets,
filters, ffts etc.).
I tried Snack, but when i downloaded the package that was supposed to be
for python, there was only the Tk/Tcl stuff (where's the .py ?).
could anyone help me with that (or with any other sound module for python)?
thanks in advance,
g



From thunderfoot at gmail.com  Thu Nov 30 11:39:35 2006
From: thunderfoot at gmail.com (thunderfoot at gmail.com)
Date: 30 Nov 2006 08:39:35 -0800
Subject: EasyInstall under Windows - strange behaviour
References: <1164903982.201944.46380@l39g2000cwd.googlegroups.com>
Message-ID: <1164904775.190791.252930@j44g2000cwa.googlegroups.com>


Norbert wrote:
> Hello all,
> i try to install ZSI under python 2.5 and windows 2000.
> I Downloaded the egg and tried the following
>
> c:\Python25\Scripts>easy_install.exe c:\download\ZSI-2.0_rc3-py2.5.egg
>
> The result is that pythonwin pops up and shows the file :
> c:\Python25\Scripts\easy_install-script.py :
> ----------------------------
> !C:\Python25\Lib\site-packages\pythonwin\Pythonwin.exe
> # EASY-INSTALL-ENTRY-SCRIPT:
> 'setuptools==0.6c3','console_scripts','easy_install'
> __requires__ = 'setuptools==0.6c3'
> import sys
> from pkg_resources import load_entry_point
>
> sys.exit(
>    load_entry_point('setuptools==0.6c3', 'console_scripts',
> 'easy_install')()
> )
> ----------------------------
>
> What is going on here ?
> I presume that there are some trivial things I don't understand, can
> someone provide apointer or hint ?
>
> Thank you for your time !
>
> Norbert

I'm no expert, but it sounds like you associated the .py file extension
with the pythonwin program, so that's what's being used to open it
(instead of the desired python.exe). See
http://support.microsoft.com/kb/320033 for more information.

hth,
Don



From antoine at vo.lu  Fri Nov 24 16:44:10 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Fri, 24 Nov 2006 22:44:10 +0100
Subject: synching with os.walk()
In-Reply-To: <mailman.679.1164383825.32031.python-list@python.org>
References: <mailman.679.1164383825.32031.python-list@python.org>
Message-ID: <d2317$456767a7$544aba09$1434@news.hispeed.ch>

Andre Meyer wrote:
> Hi all
> 
> os.walk() is a nice generator for performing actions on all files in a 
> directory and subdirectories. However, how can one use os.walk() for 
> walking through two hierarchies at once? I want to synchronise two 
> directories (just backup for now), but cannot see how I can traverse a 
> second one. I do this now with os.listdir() recursively, which works 
> fine, but I am afraid that recursion can become inefficient for large 
> hierarchies.
> 
> thanks for your help
> Andr?
> 

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/191017
might be what you are looking for, or at least a starting point...

Regards,
antoine


From sjmachin at lexicon.net  Wed Nov 29 14:53:15 2006
From: sjmachin at lexicon.net (John Machin)
Date: 29 Nov 2006 11:53:15 -0800
Subject: utf - string translation
In-Reply-To: <mailman.832.1164798594.32031.python-list@python.org>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>
	<mailman.832.1164798594.32031.python-list@python.org>
Message-ID: <1164829990.146305.92750@l39g2000cwd.googlegroups.com>


Frederic Rentsch wrote:

> Try this:
>
> from_characters   =
> '\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd8\xd9\xda\xdb\xdc\xdd\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xff\xe7\xe8\xe9\xea\xeb'
> to_characters     =
> 'AAAAAAACEEEEIIIIDNOOOOOOUUUUYaaaaaaaiiiionoooooouuuuyyceeee'
> translation_table = string.maketrans (from_characters, to_characters)
> translated_string = string.translate (original_string, translation_table)
>

A few observations on the above:

1. This assumes that "original_string" is a str object, and the text is
encoded in latin1 or similar (e.g. cp1252).

2. Presentation of the map could be improved greatly, along the lines
of:

import pprint
import unicodedata
fromc = \
[snip]
toc = 'AAAAAAACEEEEIIIIDNOOOOOOUUUUYaaaaaaaiiiionoooooouuuuyyceeee'
assert len(fromc) == len(toc)
tups = list(zip(unicode(fromc, 'latin1'), toc))
tups.sort()
tupsu = [(x[1], x[0], unicodedata.name(x[0], '** no name **')) for x in
tups]
pprint.pprint(tupsu)

which produces:

[('A', u'\xc0', 'LATIN CAPITAL LETTER A WITH GRAVE'),
 ('A', u'\xc1', 'LATIN CAPITAL LETTER A WITH ACUTE'),
[snip]
 ('D', u'\xd0', 'LATIN CAPITAL LETTER ETH'),
[snip]
 ('Y', u'\xdd', 'LATIN CAPITAL LETTER Y WITH ACUTE'),
 ('a', u'\xe0', 'LATIN SMALL LETTER A WITH GRAVE'),
[snip]
 ('o', u'\xf0', 'LATIN SMALL LETTER ETH'),
[snip]
 ('y', u'\xfd', 'LATIN SMALL LETTER Y WITH ACUTE'),
 ('y', u'\xff', 'LATIN SMALL LETTER Y WITH DIAERESIS')]

This makes it a lot easier to see what is going on, and check for
weirdness, like the inconsistent treatment of \xd0 and \xf0.

3. ... and to check for missing maps. The OP may be working only with
French text, and may not care about Icelandic and German letters, but
other readers who stumble on this (and miss past thread(s) on this
topic) may like something done with \xde (capital thorn),  \xfe (small
thorn) and \xdf (sharp s aka Eszett).

Cheers,
John



From steve at holdenweb.com  Thu Nov  2 12:58:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 17:58:30 +0000
Subject: creating new objects with references to them
In-Reply-To: <1162485707.730939.98020@i42g2000cwa.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>	<1162482760.424782.244760@h48g2000cwc.googlegroups.com>	<1162483976.152660.121200@f16g2000cwb.googlegroups.com>	<mailman.1669.1162485221.11739.python-list@python.org>
	<1162485707.730939.98020@i42g2000cwa.googlegroups.com>
Message-ID: <eidbi1$i72$1@sea.gmane.org>

JohnJSal wrote:
> Steve Holden wrote:
> 
> 
>>     del rec[7]
> 
> 
> Hmmm, but what if the record can remain open, changes can be made, and
> then saved again to the same object? I suppose it isn't necessary to
> delete them, right? Man, this stuff gets complicated....
> 
Right. Of course, once you've written a record to the database for the 
first time you need a flag to tell you it exists so that further changes 
are made with UPDATE statements. But ultimately it's just a matter of 
synchronizing the contents of an internal data structure with the 
contents of a set of windows (typically dialogs) and a database.

Another option is to use an object-relational mapper like SQLObject or 
SQLalchemy to hide most of the database ferkling.

The complexity is known as "real life". Get used to it ;-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From tim at tdw.net  Thu Nov 23 07:25:49 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 23 Nov 2006 12:25:49 +0000
Subject: socket.error connection refused
In-Reply-To: <B58381932.818.38963.1@mxextra>
References: <B58381932.818.38963.1@mxextra>
Message-ID: <9afea2ac0611230425t6a333623n4ac48e25263d4c45@mail.gmail.com>

On 23 Nov 2006 04:09:18 -0800, Vania <vania.cIlli at gmail.com> wrote:
> Hi, I'm not sure this is the proper forum but I try nevertheless.
> The problem I'am facing is that the socket library always fail to
> connect to an URL. The net effect is that I can not use setuptools.
> I'm using Python2.4 on a windows XPPRO Sp2 machine.
> The firewall is disabled.
> There is no NLTM proxy.
> I connect to the internet through a NAT server (and it works).
> Other than with easy_install I tried to connect to a number of external
> urls
> (all of them running) and even to localhost,
> directly in script using urllib
> and the error is always the same errno:  10061 connection refused.
> Any ideas?

A socket can't connect to a URL, a URL is an absolute location of an
internet resource, eg hostname + (virtual) location on a server + page
name.  A socket can connect to an IP address or hostname - which is
the first part of the URL after the "http://"  (or ftp:// etc)

You need to post a code snippet and the errors you are getting.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Nov  1 15:08:21 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 01 Nov 2006 21:08:21 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>	<mailman.1563.1162321248.11739.python-list@python.org>	<4qrln8Fo2ollU1@individual.net>	<mailman.1593.1162387930.11739.python-list@python.org>
	<4qrsafFo961qU1@individual.net>
	<mailman.1610.1162395013.11739.python-list@python.org>
Message-ID: <4qsd5kFo1tsgU1@individual.net>

Fredrik Lundh wrote:

> "enumerate" is the obviously right thing for this, sure.

K.

> but it's not necessarily the right thing for the OP's "I want to
> create a new list based on an existing list".  modifying the
> existing list is usually not the most efficient way to do that.

Agreed.

Regards,


Bj?rn

-- 
BOFH excuse #418:

Sysadmins busy fighting SPAM.



From kinch1967 at gmail.com  Wed Nov 29 01:44:18 2006
From: kinch1967 at gmail.com (bullockbefriending bard)
Date: 28 Nov 2006 22:44:18 -0800
Subject: 6 Pick Bet Grouping
In-Reply-To: <1164778063.164978.117930@j72g2000cwa.googlegroups.com>
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
	<1164777870.480711.28130@l12g2000cwl.googlegroups.com>
	<1164778063.164978.117930@j72g2000cwa.googlegroups.com>
Message-ID: <1164782658.951294.207530@l39g2000cwd.googlegroups.com>

Your explanation is correct. It's important to realise that effectively
the input many thousands of single bets come out of a black box and it
is then necessary for me to merge them into the grouped format to make
things more manageable. Given an arbitrary bucket of single bets, it is
by no means obvious how they should be grouped without doing something
algorithmic. In grouping, it is also important to not inadvertently
introduce any new single bets.

For the purpose of this discussion, I am also assuming that all bets
are the same size. That's not the case, but can leave that little twist
for another day.



From antonioskatsikadamos at yahoo.com  Wed Nov  8 09:20:57 2006
From: antonioskatsikadamos at yahoo.com (Antonios Katsikadamos)
Date: Wed, 8 Nov 2006 06:20:57 -0800 (PST)
Subject: IndentationError: expected an indented block
Message-ID: <20061108142057.39397.qmail@web58109.mail.re3.yahoo.com>

hi all. I am using python 2.4. I have to run an older python code and when i run it i get the following message

IndentationError: expected an indented block.

1)what does this mean?
2)how can i overcome this problem


Thanks for any advice.

kind regards,

Antonios

 	
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From paddy3118 at netscape.net  Tue Nov 21 17:25:23 2006
From: paddy3118 at netscape.net (Paddy)
Date: 21 Nov 2006 14:25:23 -0800
Subject: How to sort list
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
Message-ID: <1164147923.665526.292230@j44g2000cwa.googlegroups.com>


Lad wrote:

> I have a list of emails and I would like to sorted that list by domains
> E.g.
> If the list is
>
> Emails=['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com',....]
>
> after sorting I would like to have
> Emails=['a at hotmail.com','b at hotmail.com','a at yahoo.com','c at yahoo.com',....]
>
> What is the best/easiest way?
>
> Thank you for help
> L.

What have you tried?
What issues did you have with your attempts?

- Paddy.



From fredrik at pythonware.com  Sat Nov 11 17:28:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 23:28:29 +0100
Subject: httplib continuation packets
In-Reply-To: <slrnelcd4f.jtl.hakonrk@fox.venod.com>
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>
Message-ID: <ej5iqa$8iu$1@sea.gmane.org>

Haakon Riiser wrote:

> Is this a bug in httplib or the web server?

it could be that they're blocking requests from Python's urllib, of 
course.  have you tried overriding the user-agent string ?

</F>



From sjmachin at lexicon.net  Thu Nov  9 18:12:00 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 15:12:00 -0800
Subject: Simple question to split
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
Message-ID: <1163113920.871418.217470@m73g2000cwd.googlegroups.com>

Matthias Winterland wrote:
> Hi,
>
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a
> single split-call?
>

Using str method split, no -- as documented [hint!], it provides only a
single separator argument.

Using re.split function, yes -- as documented [hint!], it allows a
pattern as a separator.

The required pattern is simply expressed as "space or comma":

| import re
| >>> re.split('[, ]', '1,2,3,4,5 6 7,3,4')
| ['1', '2', '3', '4', '5', '6', '7', '3', '4']
| >>> [int(x) for x in re.split('[, ]', '1,2,3,4,5 6 7,3,4')]
| [1, 2, 3, 4, 5, 6, 7, 3, 4]

Cheers,
John



From apardon at forel.vub.ac.be  Tue Nov 28 08:26:21 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Nov 2006 13:26:21 GMT
Subject: Problem with imaplib (weird result if mailbox contains a %)
Message-ID: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>

This little program gives IMO a strange result.

import imaplib

user = "cpapen"

cyr = imaplib.IMAP4("imap.vub.ac.be")
cyr.login("cyrus", "cOn-A1r")
rc, lst = cyr.list('""', "user/%s/*" % user)
for el in lst:
  print "%r" % (el,)

And the result is:

'(\\HasNoChildren) "/" "user/cpapen/Out"'
'(\\HasNoChildren) "/" "user/cpapen/Punten"'
'(\\HasNoChildren) "/" "user/cpapen/Spam"'
'(\\HasNoChildren) "/" "user/cpapen/agoog to be"'
'(\\HasNoChildren) "/" "user/cpapen/artistiek &- kunst"'
'(\\HasNoChildren) "/" "user/cpapen/copains et copinnes =x="'
'(\\HasNoChildren) "/" "user/cpapen/cp &- writing"'
'(\\HasNoChildren) "/" "user/cpapen/examen"'
'(\\HasNoChildren) "/" "user/cpapen/important info (pass)"'
'(\\HasNoChildren) "/" "user/cpapen/lesmateriaal"'
'(\\HasNoChildren) "/" "user/cpapen/love &- flesh for fantasy"'
'(\\HasNoChildren) "/" "user/cpapen/media"'
'(\\HasNoChildren) "/" "user/cpapen/music &- beats"'
('(\\HasNoChildren) "/" {25}', 'user/cpapen/newsletters %')
''
'(\\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"'
'(\\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"'
'(\\HasNoChildren) "/" "user/cpapen/the closest ones to me [x]"'
'(\\HasNoChildren) "/" "user/cpapen/vubrations"'
'(\\HasNoChildren) "/" "user/cpapen/wm2addressbook"'
'(\\HasNoChildren) "/" "user/cpapen/wm2prefs"'
'(\\HasNoChildren) "/" "user/cpapen/wm2signature"'


What I have a problem with is the 14th and 15th line.
All other entries are strings but the 14th is a tuple.
and the 15th is an empty string. As far as I can tell
every time a "%" is in the mailbox name I get this kind of
result.

I'm using python 2.3.3 and the imap sytem is Cyrus.

Can someone explain what is going one?

Is this a bug?

If it is, is it fixed in later versions?

Whether or not it is a bug, can I rely on the mailbox
being the last item in the tuple in these cases?

-- 
Antoon Pardon


From shea at void.nil  Tue Nov  7 21:22:57 2006
From: shea at void.nil (Shea Martin)
Date: Wed, 08 Nov 2006 02:22:57 GMT
Subject: no ptyhon curses module on solaris?
Message-ID: <5cb4h.60189$H7.4783@edtnps82>

I just installed active python, and I get this error:

% python
ActivePython 2.4.3 Build 11 (ActiveState Software Inc.) based on
Python 2.4.3 (#1, Apr  3 2006, 18:34:02) [C] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
 >>> import curses
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/local/lib/python2.4/curses/__init__.py", line 15, in ?
     from _curses import *
ImportError: No module named _curses

Any ideas why?  I have libncurses 5.2 on my machine.

Thanks


From bj_666 at gmx.net  Sat Nov  4 13:58:43 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 04 Nov 2006 19:58:43 +0100
Subject: elementtree terminology + tangential questions
References: <1162655068.276394.287080@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.04.18.58.42.395976@gmx.net>

In <1162655068.276394.287080 at m73g2000cwd.googlegroups.com>, mirandacascade
wrote:

> 2) None of the xml documents to which I've had exposure (a very, very
> small set) have had text between an element's end tag and the next tag,
> hence the following question: are there some 'best practices' advice
> available to help one decide when it's a good idea to put text between
> an element's end tag and the next tag as opposed to putting text in the
> text property of an element?

This depends on the type of document.  Examples of xml with text between
tags are XHTML or DocBook. ::

  <p>This is an <em>example</em> of "tail text" in
    <strong>XHTML</strong>.</p>

Ciao,
	Marc 'BlackJack' Rintsch


From martin at v.loewis.de  Sat Nov  4 09:41:55 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 04 Nov 2006 15:41:55 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eii1ur$a60$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
Message-ID: <454ca6b4$0$151$9b622d9e@news.freenet.de>

robert schrieb:
> PS: Besides: what are speed costs of LOCK INC <mem> ?

That very much depends on the implementation. In

http://gcc.gnu.org/ml/java/2001-03/msg00132.html

Hans Boehm claims it's 15 cycles. The LOCK prefix
itself asserts the lock# bus signal for the entire
operation, meaning that the other processors
can't perform memory operations during that time.
On the P6, if the data is cacheable (for some Intel
definition of this word), the lock# signal will
not be asserted, just the cache gets locked.
The LOCK prefix also causes any pending writes
to be performed before the operation starts.

So in the worst case, a LOCK INC will have to
wait for pending writes, then will assert the
lock# prefix, then perform a read and a write
cycle memory cycle, with the increment processor
cycle in-between. Assuming a 400MHz memory bus
and a 4GHz processor, LOCK INC will take around
20 cycles, whereas a plain INC might get done
in a single cycle or less (assuming pipelining
and caching).

Regards,
Martin


From fredrik at pythonware.com  Fri Nov 10 13:52:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 19:52:09 +0100
Subject: newbie: minidom
In-Reply-To: <if25h.664$mZ5.553@tornado.fastwebnet.it>
References: <if25h.664$mZ5.553@tornado.fastwebnet.it>
Message-ID: <ej2hoq$581$1@sea.gmane.org>

Danny Scalenotti wrote:

> I'm not able to get out of this .......
> 
> from  xml.dom.minidom import getDOMImplementation
> 
> impl = getDOMImplementation()  // default UTF-8
> doc = impl.createDocument(None, "test",None)
> root = doc.documentElement
> root.setAttribute('myattrib', '5')
> 
> print root.toxml()
> 
> 
> I obtain
> 
> <test myattrib="5"/>
> 
> why not this?
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <test myattrib="5"/>

why?  the documents are equivalent, and any XML application that 
requires an explicit UTF-8 encoding declaration is broken.

</F>



From JKPeck at gmail.com  Mon Nov 13 09:56:31 2006
From: JKPeck at gmail.com (JKPeck)
Date: 13 Nov 2006 06:56:31 -0800
Subject: Character Encodings and display of strings
In-Reply-To: <mailman.62.1163428860.32031.python-list@python.org>
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
	<mailman.62.1163428860.32031.python-list@python.org>
Message-ID: <1163429791.517778.46220@f16g2000cwb.googlegroups.com>

Thanks for the quick answer.  I thought repr was involved here, but
when I use repr explicitly I get a notation where the backslashes are
escaped.  I also though that with the encoding explictily declared in
the source, that repr would take that into account and use the
character form, but obviously it doesn't.


Fredrik Lundh wrote:
> "JKPeck" wrote:
>
> >I am trying to understand why, with nonwestern strings, I sometimes get
> > a hex display and sometimes get the string printed as characters.
> >
> > With my Python locale set to Japanese and with or without a # coding of
> > cp932 (this is Windows) at the top of the file, I read a list of
> > Japanese strings into a list, say, catlis.
> >
> > With this code
> > for item in catlis:
> >       print item
> > print catlis
> > print " ".join(catlis)
> >
> > the first print (print item) displays Japanese text as characters..
> > The second print (print catlis) displays a list with the double byte
> > characters in hex notation.
> > The third print (print " ".join(catlis)) prints a combined string of
> > Japanese characters properly.
> >
> > According to the print documentation,
> > "If an object is not a string, it is first converted to a string using
> > the rules for string conversions"
> >
> > but the result is different with a list of strings.
>
> a list is not a string, so it's converted to one using the standard list representation
> rules -- which is to do repr() on all the items, and add brackets and commas as
> necessary.
>
> for some more tips on printing, see:
> 
>     http://effbot.org/zone/python-list.htm#printing
> 
> </F>



From pavlovevidence at gmail.com  Tue Nov 21 16:46:08 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Nov 2006 13:46:08 -0800
Subject: Note about getattr and '.'
In-Reply-To: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
References: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
Message-ID: <1164145568.453822.24340@m73g2000cwd.googlegroups.com>


szport at gmail.com wrote:
> There is an interesting skewness in python:
>
> class A(object): pass
>
> >>> a=A()
> >>> setattr(a, '$foo', 17)
> >>> getattr(a, '$foo')
> 17
>
> But I can't write
> >>> a.'$foo'

Likewise, you can write

setattr(a,'hello',17)

but you can't write

a.'hello'

but you can write

a.hello

The only thing that can follow the "." (attribute access) operator is a
valid Python identifier.  Strings may not.  Anyways, it's probably not
a good idea in most cases to use getattr and setattr with a
non-identifier, but Python doesn't prevent you from doing it.  (Which
is good in the occasional case where it is a good idea.)

BTW, Matlab has an interesting syntax; you could have written this:

a.("$foo")

(And because Matlab is weird that way, this was not structure member
access, but some weird hybrid of structure accces and indexing and/or
slicing.  The syntax was very useful in Matlab because there's no
built-in associative array and using this syntax was the easiest way to
get something like it.  In Python we'd do that with a dict, so it's not
so useful here.)


Carl Banks



From fredrik at pythonware.com  Sun Nov 12 06:22:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 12:22:28 +0100
Subject: Find interface associated with default route?
In-Reply-To: <ej6vr6$17a$1@sea.gmane.org>
References: <ej6vr6$17a$1@sea.gmane.org>
Message-ID: <ej705n$2n9$1@sea.gmane.org>

Neal Becker wrote:

> Any thoughts on howto find the interface associated with the default route
> (this is on linux)?

are you sure you sent this to the right newsgroup ?

is this what you want ?

 >>> import os
 >>> for line in os.popen("/sbin/route"):
...     line = line.split()
...     if line[0] == "default":
...             print line[-1]
...
eth0

</F>



From skip at pobox.com  Wed Nov  8 09:23:31 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 08:23:31 -0600
Subject: for x in... x remains global
In-Reply-To: <4rdvnsFqv1sdU1@mid.uni-berlin.de>
References: <dfc90$4551c444$544abc47$21060@news.hispeed.ch>
	<4rdvnsFqv1sdU1@mid.uni-berlin.de>
Message-ID: <17745.59491.665139.538081@montanaro.dyndns.org>


    Diez> It's an somewhat unfortunate fact that loop variables leak to the
    Diez> outer scope.  List-comps as well, btw.

It's unfortunate that loop variables leak from list comprehensions (they
don't leak in genexps).  It's by design in for loops though.  Consider:

    for i in range(10):
        if i*i == 9:
            break
    print i

In this silly example, the loop index is the useful value of the
computation.  You could assign to a different variable, though that would be
slightly ugly:

    for i in range(10:
        j = i
        if j*j == 9:
            break
    print j

Skip


From jorge.vargas at gmail.com  Sat Nov  4 08:44:45 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sat, 4 Nov 2006 13:44:45 +0000
Subject: [OT] how to write code into a blog post?
Message-ID: <32822fe60611040544j21d8d178p594e7dc9080e0f7@mail.gmail.com>

Hi I know many people here blog so sorry for the OT.

Currently I have a wordpress install and went I wanted to post some
code I notice how painfull it is. I'm still in shock that programmers
forgot about posting code on their own engine, but oohh well they are
php :D

anyway I'll like to know your experiences I google around for wp
plugins and half of them are dead links and the other half I wasn't
very existed about.

I'm running this on a very good webhost so I can install pretty much
anything. so I'll accept suggestions either for wp plugins or another
engine, but the only way I'll accept something like blogger is that
they let me have it on my hostname or at least make me do overwrites.

I'm even willing to change my blogging platform if that's the best
way. So please post your suggestions there too.

thanks


From larry.bates at websafe.com  Tue Nov 14 17:11:41 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 14 Nov 2006 16:11:41 -0600
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
Message-ID: <n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>

walterbyrd wrote:
> I don't know if this is a fair comparison or not. Any comments
> appreciated.
> 
> - Python is more readable, and more general purpose
> - PHP has awful backward compatibility
> - PHP has a lower barrier to entry
> - Most inexpensive web-hosters support PHP, but not Python
> - PHP has far more pre-writen scripts available
> - Newer versions of mod_python require Apache 2.0, which few hosters
> have
> - There is more demand for PHP developers, than Python developers
> 

For the most part you wouldn't ever thing about writing data
conversion programs, GUI applications, Windows services, COM+ objects,
Linux daemons, simple scripts, socket server/client applications,
etc. in PHP (but all can be done in Python).  Web apps are just one of
the many applications that Python can tackle.  PHP is normally
relegated to dynamic web page creation and database interfacing of
a web application.  I've never seen it promoted as a language
that can be used to develop a standalone non-web browser based
application (but I'm sure someone will tell me that it can be used
that way ;-).

I agree that you can use PHP to do some basic Web apps more
quickly and with more general availability in PHP than Python.
I think there is a reason that Java and Python are used to power
the larger application frameworks that I see (e.g. WebSphere,
WebLogic, Zope, etc.).

I find many hosting companies that have mod_python now (this
wasn't the case a couple of years ago).  Hosting costs have
dropped so much during that time that getting Python doesn't
cost much (if any) extra.

I'd be surprised if there was more demand for PHP developers
than Python developers.  Google lists 51 PHP jobs and 168
Python jobs in their internal jobs database (I just did a
quick search).

-Larry


From gnewsg at gmail.com  Sun Nov  5 15:38:37 2006
From: gnewsg at gmail.com (billie)
Date: 5 Nov 2006 12:38:37 -0800
Subject: RAW network programming under Windows
Message-ID: <1162759117.346975.255000@f16g2000cwb.googlegroups.com>

RAW network programming under Windows it's not always possible because
of the security limitations that microsoft introduced in the latest
Windows versions and that affects WinSocket API.
On UNIX systems I'm able to freely send raw packets (for example I'm
able to compile IP packets with a src address defined by me) through
raw socket API, but if I do the same on a Windows system socket module
raises an error.

Now I'm searching for something different from raw socket api, an
extension module able to send arbitrary RAW packets through the
network.
I noticed that WinPcap (http://www.winpcap.org/) has a function to do
that (pcap_sendpacket()) so I started to search a Python wrapping for
WinPcap.
I found:
pcapy: http://oss.coresecurity.com/projects/pcapy.html
pypcap: http://www.monkey.org/~dugsong/pypcap/
...but none of them include a wrap for pcap_sendpacket() function.

Does someone know if exist a *complete* Python wrapping of WinPcap
library?



From fredrik at pythonware.com  Mon Nov 13 15:51:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 21:51:11 +0100
Subject: Python memory usage
In-Reply-To: <1163450668.617908.208020@h54g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>
	<1163450668.617908.208020@h54g2000cwb.googlegroups.com>
Message-ID: <ejalrv$7sd$1@sea.gmane.org>

Klaas wrote:

> I think floats use obmalloc so I'm slightly surprised you don't see
> differences.

as noted in the FAQ I just posted a link to, floats also use a free list 
(using pretty much identical code to that used for integers).

see comments in Objects/intobject.c (quoted below) and 
Objects/floatobject.c for details.

</F>

/* Integers are quite normal objects, to make object handling uniform.
    (Using odd pointers to represent integers would save much space
    but require extra checks for this special case throughout the code.)
    Since a typical Python program spends much of its time allocating
    and deallocating integers, these operations should be very fast.
    Therefore we use a dedicated allocation scheme with a much lower
    overhead (in space and time) than straight malloc(): a simple
    dedicated free list, filled when necessary with memory from malloc().

    block_list is a singly-linked list of all PyIntBlocks ever allocated,
    linked via their next members.  PyIntBlocks are never returned to the
    system before shutdown (PyInt_Fini).

    free_list is a singly-linked list of available PyIntObjects, linked
    via abuse of their ob_type members.
*/

#define BLOCK_SIZE	1000	/* 1K less typical malloc overhead */
#define BHEAD_SIZE	8	/* Enough for a 64-bit pointer */



From bearophileHUGS at lycos.com  Thu Nov 30 19:40:16 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Nov 2006 16:40:16 -0800
Subject: best way to align words?
In-Reply-To: <1164930554.608614.280060@l12g2000cwl.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
	<1164930554.608614.280060@l12g2000cwl.googlegroups.com>
Message-ID: <1164933616.037945.124510@l12g2000cwl.googlegroups.com>

> This is my first solution try, surely there are faster, shorter, better
> solutions...
> It creates a graph with the paths of words, then sorts the graph
> topologically,

Beside possible inefficiencies, this "solution" breaks if words aren't
in the correct order, the topological sort can't work...
I'll have to think about better solutions, if possible.

Sorry,
bye,
bearophile



From martin.witte at gmail.com  Wed Nov  1 09:14:15 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 1 Nov 2006 06:14:15 -0800
Subject: best way to check if a file exists?
In-Reply-To: <mailman.1597.1162389697.11739.python-list@python.org>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>
	<mailman.1597.1162389697.11739.python-list@python.org>
Message-ID: <1162390455.727684.118970@b28g2000cwb.googlegroups.com>


Ben Finney wrote:
> "wittempj at hotmail.com" <martin.witte at gmail.com> writes:
>
> > You could try to read the file, if that fails it doesn't exist:
> >
> > try:
> >     f = open('xxx')
> > except IOError:
> >     f = open('xxx', 'w')
> >     print "file doesn't exist"
> > print f
>
> Except that there are other conditions than "File doesn't exist" that
> can cause an 'open' to fail.
>
Ok, true. You can test explicit on non existence as follows, and then
decide to open the file

import errno
try:
    f = open('xxx')
except IOError, e:
    if e.errno == errno.ENOENT:
        f = open('xxx', 'w')
print f

> --
>  \            "If you continue running Windows, your system may become |
>   `\                 unstable."  -- Microsoft, Windows 95 BSOD message |
> _o__)                                                                  |
> Ben Finney



From kdotsky at gmail.com  Sun Nov 26 03:54:43 2006
From: kdotsky at gmail.com (kdotsky)
Date: 26 Nov 2006 00:54:43 -0800
Subject: urllib2 spinning CPU on read
Message-ID: <1164531283.213844.243990@l39g2000cwd.googlegroups.com>

Hello All,
I've ran into this problem on several sites where urllib2 will hang
(using all the CPU) trying to read a page.  I was able to reproduce it
for one particular site.  I'm using python 2.4

import urllib2
url = 'http://www.wautomas.info'
request = urllib2.Request(url)
opener = urllib2.build_opener()
result = opener.open(request)
data = result.read()

It never returns from this read call.

I did some profiling to try and see what was going on and make sure it
wasn't my code.  There was a huge number of calls to (and amount of
time spent in) socket.py:315(readline) and to recv.  A large amount of
time was also spent in httplib.py:482(_read_chunked).  Here's the
significant part of the statistics:

         32564841 function calls (32563582 primitive calls) in 545.250
CPU seconds

   Ordered by: internal time
   List reduced from 416 to 50 due to restriction <50>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
 10844775  233.920    0.000  447.440    0.000 socket.py:315(readline)
 10846078  152.430    0.000  152.430    0.000 :0(recv)
        3   97.330   32.443  544.730  181.577
httplib.py:482(_read_chunked)
 10844812   61.090    0.000   61.090    0.000 :0(join)


Also, where should I go to see if something like this has already been
reported as a bug?

Thanks for any help you can give me.



From Leo.Kislov at gmail.com  Tue Nov 28 04:35:48 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 01:35:48 -0800
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
Message-ID: <1164706548.778583.267730@n67g2000cwd.googlegroups.com>


Peter Otten wrote:
> Peter Otten wrote:
>
> > HYRY wrote:
> >
> >> I want to join two mono wave file to a stereo wave file by only using
> >> the default python module.
> >> Here is my program, but it is much slower than the C version, so how
> >> can I increase the speed?
> >> I think the problem is at line #1, #2, #3.
> >
> >> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
> >
> > ITEMSIZE = 2
> > size = ITEMSIZE*(len(larray) + len(rarray))
> > oarray = array.array("h")
> > oarray.fromstring("\0" * size)
> >
> > may be a bit faster.
>
> Confirmed:
>
> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
> array("h"); a.fromstring("\0"*(2*N))'
> 100 loops, best of 3: 9.68 msec per loop
> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a = array("h",
> [0]*N);'
> 10 loops, best of 3: 199 msec per loop

Funny thing is that using huge temporary string is faster that
multiplying small array:

C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
=array('h'); a.fromstring('\0'*(2*N))"
100 loops, best of 3: 9.57 msec per loop

C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
= array('h','\0\0'); a*N"
10 loops, best of 3: 28.4 msec per loop

Perhaps if array multiplication was as smart as string multiplication
then array multiplication version would be the fastest.

  -- Leo



From duncan.booth at invalid.invalid  Mon Nov 27 08:43:00 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Nov 2006 13:43:00 GMT
Subject: working with files and directories
References: <7IAah.58105$uv5.416763@twister1.libero.it>
	<mailman.766.1164631069.32031.python-list@python.org>
	<jkBah.58160$uv5.417213@twister1.libero.it>
Message-ID: <Xns98888B8FD9B32duncanbooth@127.0.0.1>

"halex2000" <powernews at libero.it> wrote:
> "Thomas Ploch" <Thomas.Ploch at gmx.net> ha scritto nel messaggio 
> news:mailman.766.1164631069.32031.python-list at python.org...
>> Have you actually even tried to find some "documentation"?
>> Have you placed a google search "python directories rename files"?
>> Thomas
> 
> Actually I did it on the documentation file provided with the windows 
> distribution. I took a look at 11 ("File and Directory Access") but
> the listed functions doesn't appear to be what I need. 14.1.4 should
> do the job, but was not as intuitive to find as the previous one. 
> 
Do you know about the search tab in windows help? Searching for "rename 
files", or indeed a search identical to the one suggested for Google will 
both find 14.1.4 as the top hit.


From sjmachin at lexicon.net  Sun Nov 19 20:33:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 19 Nov 2006 17:33:45 -0800
Subject: Looking for a graph (as in network, nodes) package
In-Reply-To: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
References: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
Message-ID: <1163986425.634592.240620@h48g2000cwc.googlegroups.com>


John Henry wrote:
> I am looking for a ready made simple graph package.  I found an
> extensive one in the piana package but when  I try to use just the
> graph portion, it fails to load because of the line:
>
> class Graph(object):

"fails to load" is insufficient information. Please provide the
traceback and the actual error message.

What version of Python are you using? That line should be OK from
Python 2.2 onwards.

>  ...
>
> It seems that their Graph is subclassed from "object" but I couldn't
> find a "object" class anywhere.  So, I abandoned using that one.
>

object is built-in to Python. It is the uber-class from which new-style
classes inherit.
New-style classes were introduced in Python 2.2

class Foo(object): # new-style class

class Bar: # old-style class



From mike.klaas at gmail.com  Mon Nov 20 17:23:51 2006
From: mike.klaas at gmail.com (Klaas)
Date: 20 Nov 2006 14:23:51 -0800
Subject: a few extensions for the itertools
In-Reply-To: <45616b46$0$12642$3b214f66@tunews.univie.ac.at>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
Message-ID: <1164061431.581363.156430@m73g2000cwd.googlegroups.com>

Mathias Panzenboeck wrote:

> It's like the . operator in haskell:
>
> fchain(f,g,h) is the same like lambda *args,**kwargs: f(g(h(*args,**kwargs)))

I used this once:

composedfun = lambda arg: reduce(lambda x, f: f(x), funcs, arg)

so I can see the potential need (it is not terribly obvious in short-
or long- form).

If this belongs anywhere, though, it is functools, not itertools.

-Mike



From *firstname*nlsnews at georgea*lastname*.com  Fri Nov 10 11:30:00 2006
From: *firstname*nlsnews at georgea*lastname*.com (Tony Nelson)
Date: Fri, 10 Nov 2006 16:30:00 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
Message-ID: <*firstname*nlsnews-9084D6.11300110112006@news.verizon.net>

In article <4rhku3FriokeU2 at mid.individual.net>,
 Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> 
 wrote:

> Michael Hobbs wrote:
> 
> > That is, assume that the expression ends at the colon, not at the
> > newline. That would make this type of statement possible:
> >     if color == red or
> >       color == blue or
> >       color == green:
> >         return 'primary'
> > Right now, such a statement would have to be spelled thus:
> >     if color == red or \
> >       color == blue or \
> >       color == green:
> >         return 'primary'
> > or
> >     if (color == red or
> >       color == blue or
> >       color == green):
> >         return 'primary'
> 
> What about
> 
> if color == red or blue or green:
>     return 'primary'

What about

    if color in [red, blue, green]:
        return 'primary'
________________________________________________________________________
TonyN.:'                        *firstname*nlsnews at georgea*lastname*.com
      '                                  <http://www.georgeanelson.com/>


From gagsl-py at yahoo.com.ar  Sun Nov 19 22:28:34 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 00:28:34 -0300
Subject: edit text in a file and save it again
In-Reply-To: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>
References: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061120002502.03dbbfc0@yahoo.com.ar>

At Sunday 19/11/2006 20:07, cyberco wrote:

>I must be overlooking something here... I'm trying to edit a line in a
>text file. I thought this was easy with fileinput, but all examples do
>not write the line back to the file but simply 'print' it. I want to
>open the file, edit the line and save it again. Is fileinput the right
>module for that?

Short answer: You can't.
Use an intermediate file. Keep reading from the original file and 
writing to the intermediate file, until you find the line to replace. 
Process that line and write to the output; then keep reading and 
writing until the end.
Delete or rename the original file; and rename the intermediate file.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From carsten at uniqsys.com  Mon Nov 13 13:35:04 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Nov 2006 13:35:04 -0500
Subject: Is python for me?
In-Reply-To: <1163441697.231672.163480@k70g2000cwa.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
Message-ID: <1163442904.3434.60.camel@dot.uniqsys.com>

On Mon, 2006-11-13 at 10:14 -0800, Dan Lenski wrote:
> lennart wrote:
> > So i ask myself is python the language I'm looking for?
> 
> Yep!  Python is very much a jack-of-all-trades language.

I'll run the risk of being nitpicky, but the full phrase is "Jack of all
trades, master of none," which doesn't do Python justice. Python is a
master of all trades!

But I agree with Dan's sentiment, Python is definitely the language
you're looking for.

-Carsten.




From no-spam at no-spam-no-spam.com  Thu Nov  2 13:51:08 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 02 Nov 2006 19:51:08 +0100
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1678.1162491833.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>
	<mailman.1678.1162491833.11739.python-list@python.org>
Message-ID: <eiden1$sj0$1@news.albasani.net>

Fredrik Lundh wrote:
> robert wrote:
> 
>> Is it really not possible to create extension libs with
>  > older MSVC or Mingw, which work with regular Python binaries
>  > version 2.4 and 2.5 ?
> 
> last time I tried, it took me 20 minutes from that I typed "mingw" into 
> google until I had built and tested my first non-trivial extension. your 
> milage may vary.

thats far beyond my dexterity.

When one follows ..
http://docs.python.org/inst/tweak-flags.html#SECTION000622000000000000000 
http://www.zope.org/Members/als/tips/win32_mingw_modules

..this seems only to cover the immediate python dll issues. What happens with the C runtime libraries? You'll bind 2 different C-RTLs (DLLs) etc.? 
And what happens for example with heap objects created with one C-RTL and deleted/free'd with the other?

-robert



From bytter at gmail.com  Wed Nov 22 14:17:52 2006
From: bytter at gmail.com (Bytter)
Date: 22 Nov 2006 11:17:52 -0800
Subject: PyParsing and Headaches
Message-ID: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>

Hi,

I'm trying to construct a parser, but I'm stuck with some basic
stuff... For example, I want to match the following:

letter = "A"..."Z" | "a"..."z"
literal = letter+
include_bool := "+" | "-"
term = [include_bool] literal

So I defined this as:

literal = Word(alphas)
include_bool = Optional(oneOf("+ -"))
term = include_bool + literal

The problem is that:

term.parseString("+a") -> (['+', 'a'], {}) # OK
term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
recognize any token since I didn't said the SPACE was allowed between
include_bool and literal.

Can anyone give me an hand here?

Cheers!

Hugo Ferreira

BTW, the following is the complete grammar I'm trying to implement with
pyparsing:

## L ::= expr | expr L
## expr ::= term | binary_expr
## binary_expr ::= term " " binary_op " " term
## binary_op ::= "*" | "OR" | "AND"
## include_bool ::= "+" | "-"
## term ::= ([include_bool] [modifier ":"] (literal | range)) | ("~"
literal)
## modifier ::= (letter | "_")+
## literal ::= word | quoted_words
## quoted_words ::= '"' word (" " word)* '"'
## word ::= (letter | digit | "_")+
## number ::= digit+
## range ::= number (".." | "...") number
## letter ::= "A"..."Z" | "a"..."z"
## digit ::= "0"..."9"

And this is where I got so far:

word = Word(nums + alphas + "_")
binary_op = oneOf("* and or", caseless=True).setResultsName("operator")
include_bool = oneOf("+ -")
literal = (word | quotedString).setResultsName("literal")
modifier = Word(alphas + "_")
rng = Word(nums) + (Literal("..") | Literal("...")) + Word(nums)
term = ((Optional(include_bool) + Optional(modifier + ":") + (literal |
rng)) | ("~" + literal)).setResultsName("Term")
binary_expr = (term + binary_op + term).setResultsName("binary")
expr = (binary_expr | term).setResultsName("Expr")
L = OneOrMore(expr)


-- 
GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85



From vania.cIlli at gmail.com  Fri Nov 24 04:54:08 2006
From: vania.cIlli at gmail.com (Vania)
Date: 24 Nov 2006 01:54:08 -0800
Subject: socket.error connection refused
In-Reply-To: <1164292108.395755.172250@f16g2000cwb.googlegroups.com>
References: <B58381932.818.38963.1@mxextra>
	<mailman.635.1164284752.32031.python-list@python.org>
	<1164285165.811809.175040@j72g2000cwa.googlegroups.com>
	<4slngrF10ij2pU1@mid.individual.net>
	<1164292108.395755.172250@f16g2000cwb.googlegroups.com>
Message-ID: <1164362048.683892.257420@f16g2000cwb.googlegroups.com>


For anyone interested restarting windows fixed the connection problem.



From uval at rz.uni-karlsruhe.de  Wed Nov  1 11:48:48 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Wed, 01 Nov 2006 17:48:48 +0100
Subject: re question
Message-ID: <eibipo$4pn$1@news2.rz.uni-karlsruhe.de>

Hello all,

I didn't found more appropriate news group for
this question, please let me know if there is ng with
regular expression as its main topic

I am trying to construct a case where a greedy and
non greedy operation produce different result.
I dont see the difference between 'a??b' and 'a?b'
As far I understand is that ? will first try to match a
(it's greedy) and only if it fails then it step back
and lets a unmatched. The other doesn't match a at first,
only if the pattern fails to match it steps back and match a.

But don't they do eventually the same thing?
Can someone provide an example where 2 patterns yield
different results.

Regards, Daniel


From chris at kateandchris.net  Wed Nov 22 13:35:47 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Wed, 22 Nov 2006 13:35:47 -0500
Subject: Programmatically replacing an API for another module
In-Reply-To: <rc57m29qq8m1uebvrkc9g7bcn9li38agdv@4ax.com>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<4562de7f$0$21252$426a34cc@news.free.fr>
	<rc57m29qq8m1uebvrkc9g7bcn9li38agdv@4ax.com>
Message-ID: <20061122183547.GA3929@kateandchris.net>

On Tue, Nov 21, 2006 at 05:00:32PM -0800, Tom Plunket wrote:
> Bruno Desthuilliers wrote:
> 
> > > I've got a bunch of code that runs under a bunch of unit tests.  It'd
> > > be really handy if when testing I could supply replacement
> > > functionality to verify that the right things get called without those
> > > things actually getting called, since frequently those calls take a
> > > long time to execute and do things that, well, I don't really want to
> > > do.
> > 
> > Congratulation, you just rediscovered the MockObject.
> 
> How do I rediscover something that I'm explicitly implementing?  I had
> set out specifically to mock an API, there was no rediscovery going
> on.
> 
> That does allow me to discover via Google the Python Mock Module,
> though, which may well do what I want:
> 
> from TestedModule import *
> 
> my_win32file = Mock({
>    'CopyFile': 'CopyFile called'
>    }
> 
> win32file = my_win32file
> 
> ...perhaps.
> 
> I'm just a bit loathe to download and install more stuff when
> something simpler appears to be near-at-hand.  ...especially
> considering the page describing this module doesn't offer any download
> links!  http://python-mock.sourceforge.net/
How about mini-mock:
http://blog.ianbicking.org/minimock.html
> 
> 
> -tom!
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From bdesth.quelquechose at free.quelquepart.fr  Sun Nov 19 17:43:55 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Nov 2006 23:43:55 +0100
Subject: Overwrite only one function with property()
In-Reply-To: <mailman.441.1163887594.32031.python-list@python.org>
References: <mailman.441.1163887594.32031.python-list@python.org>
Message-ID: <4560d91c$0$17497$426a34cc@news.free.fr>

Kai Kuehne a ?crit :
> Hi list!
> It is possible to overwrite only one function with the property-function?

property is not function, it's a class. And it doesn't "overwrite" anything.

> x = property(getx, setx, delx, 'doc')
> 
> I just want to overwrite setx, but when I set the others to None,
> I can't read and del the member. 

You don't "overwrite" setx, you pass it as an argument to the property 
constructor call.

> Any ideas or is this not possible?

Read this, and you'll have a detailed answer:
http://users.rcn.com/python/download/Descriptor.htm


> Thank you!
> Kai


From john106henry at hotmail.com  Sun Nov 19 11:11:31 2006
From: john106henry at hotmail.com (John Henry)
Date: 19 Nov 2006 08:11:31 -0800
Subject: Why isn't SPLIT splitting my strings
In-Reply-To: <1163952617.270591.279730@j44g2000cwa.googlegroups.com>
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
	<1163932286.420652.100100@f16g2000cwb.googlegroups.com>
	<1163952617.270591.279730@j44g2000cwa.googlegroups.com>
Message-ID: <1163952691.372592.76110@k70g2000cwa.googlegroups.com>

Oops!

newString= re.split("[; ()\[\]", result)

John Henry wrote:
> Meaning:
>
> import re
>
> newString= re.split('[; ()\[\]", result)
>
>
>
> Nick Vatamaniuc wrote:
> > The regular string split does not take a _class_ of characters as the
> > separator, it only takes one separator. Your example suggests that you
> > expect that _any_ of the characters "; ()[]" could be a separator.
> > If you want to use a regular expression as a list of separators, then
> > you need to use the split function from the regular expression module
> > (re):
> > http://docs.python.org/lib/node46.html
> >
> > Hope this helps,
> > Nick V.
> >
> >
> > ronrsr wrote:
> > > I'm trying to break up the result tuple into keyword phrases.  The
> > > keyword phrases are separated by a ;  -- the split function is not
> > > working the way I believe it should be. Can anyone see what I"m doing
> > > wrong?
> > >
> > > bests,
> > >
> > > -rsr-
> > >
> > >
> > >
> > >  print "newstring =", str(result[i][0])
> > >         print "just split", str(result[i][0]).split('; ()[]"')
> > >         zd.append(str(result[i][0]).split('; ()[]"'))
> > >
> > >
> > > result= (('Agricultural subsidies; Foreign aid',), ('Agriculture;
> > > Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
> > > Childhood Development, Birth Defects; Toxic Chemicals',),
> > > ('Antibiotics, Animals',), ('Agricultural Subsidies, Global Trade',),
> > > ('Agricultural Subsidies',), ('Biodiversity',), ('Citizen Activism',),
> > > ('Community Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture,
> > > Cotton',), ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
> > > ('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
> > > Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
> > > Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
> > > ('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
> > > Childhood Development, Birth Defects',), ('Corporate Reform,
> > > Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
> > > (Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
> > > Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
> > > ('Democracy, Corporate
> > >
> > >
> > >
> > > partial results:
> > >
> > > string a =  Agricultural subsidies; Foreign aid
> > > newstring = Agricultural subsidies; Foreign aid
> > > just split ['Agricultural subsidies; Foreign aid']
> > > newstring = Agriculture; Sustainable Agriculture - Support; Organic
> > > Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> > > Toxic Chemicals
> > > just split ['Agriculture; Sustainable Agriculture - Support; Organic
> > > Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> > > Toxic Chemicals']
> > > newstring = Antibiotics, Animals
> > > just split ['Antibiotics, Animals']



From gagsl-py at yahoo.com.ar  Wed Nov  8 16:42:37 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 18:42:37 -0300
Subject: Python c-api and reusing python-objects: works only once
In-Reply-To: <1163016241.418970.54900@b28g2000cwb.googlegroups.com>
References: <1163016241.418970.54900@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108183316.01d5bd58@yahoo.com.ar>

At Wednesday 8/11/2006 17:04, karye2004 at gmail.com wrote:

>I'm trying to access python objects from c++. It works once. Second
>time it hangs.
>Does someone have any clue or some example code or pointer?

In general, try to make a *small* example that reproduces the problem you have.

>And the c++ class executed inside a thread:
>--------------------------------------------------------------------------------------------------
>QStringList Pythonizer::getPackages( char *pyModule )
>{
>         // Initialize the Python Interpreter
>         Py_Initialize();
>
>  [... some code ...]
>
>         DEBUG_LINE_INFO;
>         if ( PyErr_Occurred() ) {
>                 PyErr_Print();
>                 PyErr_Clear();
>                 return QStringList::QStringList();
>         }
>
>  [... more code ...]
>         // Finish the Python Interpreter
>         Py_Finalize();
>
>         return packageList;
>}

You are initializing the interpreter on *each* call to getPackages - 
don't do that. Worse, "inside a thread". Just initialize the 
interpreter when your program begins, and finalize it when your program ends.
Your current code does not call Py_Finalize when an error occurs. The 
next time, you invoke Py_Initialize again; and you shouldn't.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Tue Nov 21 01:39:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 22:39:45 -0800
Subject: Parsing/Splitting Line
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
Message-ID: <1164091185.904564.58430@k70g2000cwa.googlegroups.com>

acatejr at gmail.com wrote:
> I have a text file and each line is a list of values.  The values are
> not delimited, but every four characters is a value.  How do I get
> python to split this kind of data?  Thanks.

1. Look for "slicing" or "slice" or "slices" in the Python tutorial.
2. Write some code.
3. Run it.



From ronrsr at gmail.com  Sun Nov 12 22:11:21 2006
From: ronrsr at gmail.com (ronrsr)
Date: 12 Nov 2006 19:11:21 -0800
Subject: how do i map this?
Message-ID: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>

I think I am passing the wrong argument to the Print_row routine:



Traceback (most recent call last):
  File "index.py", line 91, in ?
    zhtml.print_row(record)
  File "/usr/www/users/homebase/realprogress/zingers/zhtml.py", line
154, in pri
nt_row
    print """<tr>
TypeError: format requires a mapping
homebase at upsilon%



routine from zhtml.py:

#row is a dictionary with keys: zid, keywords, citation, quotation
def print_row(row):
   print """<tr>
      <td class="pad">%(keywords)s
      </td>
      <td class="pad">%(quotation)s
      </td>
      <td class="pad">%(citation)s
      </td>
      <td class="pad" align="center"><form action="update.py"
name="updateform" enctype="application/x-www-form-urlencoded"
method="GET"><input type="hidden" name="zid" value="%(zid)d"><input
type="submit" value="Edit"></form>
      </td>
      </tr>
      """


code from index.py:


cursor.execute(querystring);
# get the resultset as a tuple
result = cursor.fetchall()
# iterate through resultset
for record in result:
      print record[0] , "-->", record[1]

#zq = zc.query(querystring).dictresult()

#HTML

import zhtml
zhtml.print_start_html()
zhtml.print_header("Frankie's Zingers")

if form.has_key("printview"):
   print ("xxxxthenxxxxxx")
   zhtml.printp_start_table()
   zhtml.printp_title_row()
   for record in result:
      zhtml.printp_row(record[row])
else:
#   print ("xxxxxelsexxxxx",record[1]);
   zhtml.print_top_controls(k=k,c=c,q=q)
   zhtml.print_start_table()
   zhtml.print_title_row()
   zhtml.print_search_row(k=k,c=c,q=q)
   for record in result:


      print(record);
      zhtml.print_row(record)

zhtml.print_end_table()
zhtml.print_end_html()






how do i go about mapping that, if tha'ts what I need to do.
thanks again for your help.

bests, 

-rsr-



From vbgunz at gmail.com  Sat Nov 25 19:10:49 2006
From: vbgunz at gmail.com (vbgunz)
Date: 25 Nov 2006 16:10:49 -0800
Subject: case insensitive dictionary
In-Reply-To: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
Message-ID: <1164499849.215048.189340@45g2000cws.googlegroups.com>


John Henry wrote:
> I believe the standard dictionary should be amened to allow the use of
> case insensitive keys - as an option.  I found some work done by others
> to do that at:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/283455
>
> but the problem with that approach is that they lowercase the keys
> immediately when you create the dictionary and so the true identity of
> the key is lost.
>
> Of course, I can subclass it and save a copy of the "real" key but
> that's kind of messcy.
>
> In other words:
>
> If I have:
>
>     pets=caselessDict()
>
>     pets["Cat"] = 3
>     pets["Dog"] = 2
>
> I would like to see:
>
>    pets["cat"]  prints 3
>    pets["DOG"] prints 2
>
> but
>
>    print pets.keys()
>
> should print:
>
> "Cat", "Dog"
>
> not:
>
> "cat", "dog"

You can try to title-case the list returned with keys() like so:
print [x.title() for x in pets.keys()]

Not a perfect solution but you get what you want... just an idea :)



From virusalert at fastweb.it  Thu Nov  9 07:28:42 2006
From: virusalert at fastweb.it (virusalert at fastweb.it)
Date: Thu, 09 Nov 2006 13:28:42 +0100
Subject: Antivirus Notification
Message-ID: <20061109122844.189651E4006@bag.python.org>

InterScan Messaging Security Suite notification
-------------- next part --------------
An embedded message was scrubbed...
From: python-list at python.org
Subject: RETURNED MAIL: SEE TRANSCRIPT FOR DETAILS
Date: Thu, 9 Nov 2006 13:26:55 +0100
Size: 1582
URL: <http://mail.python.org/pipermail/python-list/attachments/20061109/b38dfeb2/attachment.mht>

From timothy at open-networks.net  Sun Nov  5 00:18:20 2006
From: timothy at open-networks.net (timmy)
Date: Sun, 05 Nov 2006 15:18:20 +1000
Subject: python GUIs comparison (want)
In-Reply-To: <1162657420.655675.185930@e3g2000cwe.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
Message-ID: <454d73ab@quokka.wn.com.au>

Mudcat wrote:
> I have been using Tkinter for several years now. Recently I have been
> thinking about switching to something else that may have a sharper
> appearance. However I'm not sure what that may be, and if that
> something else is *that* much better than what I'm already using.
> 
> Does everyone agree that wxPython looks best on Windows? I've also read
> in a couple of places where Dabo looks pretty good as well.
> 
> So if someone were to pick a UI that gave the best appearance, what
> would they choose?
> 
> 
i've been using wxpython for a few years and it's great.
it's got far better widgets then tkinter and it's speed is greater on 
large stuff as well.
it's got a great support forum and the maintainer robin dunn does a 
great job of answering all questions.
i can't particularly fault wxpython. it looks great on all platforms and 
maintain the native look and feel of the platofrm as well.


From theller at ctypes.org  Thu Nov 30 15:04:58 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 30 Nov 2006 21:04:58 +0100
Subject: Python spam?
In-Reply-To: <ekn9pi$ek8$1@panix3.panix.com>
References: <ekn9pi$ek8$1@panix3.panix.com>
Message-ID: <ekndha$83v$1@sea.gmane.org>

Aahz schrieb:
> Anyone else getting "Python-related" spam?  So far, I've seen messages
> "from" Barry Warsaw and Skip Montanaro (although of course header
> analysis proves they didn't send it).

I'm getting spam not only from Barry, but also from myself ;-) with forged headers.
But I'm not sure what you mean with Python-related...  Not the contents, IIRC.

Thomas



From no-spam at no-spam-no-spam.invalid  Sat Nov  4 12:01:39 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 04 Nov 2006 18:01:39 +0100
Subject: Trouble compiling win32all on Windows
Message-ID: <eiih1o$1jd$1@news.albasani.net>

I've trouble compiling win32all. VC98 and latest SDK installed (otherwise with original SDK it won't even compile).
It tells that uuid.lib(cguid_i.obj) : fatal error LNK1103: debug info is destroyed.  This lib file is in the SDK file tree. What should I do?

( a cguid_i.* file is not in this SDK tree )


C:\usr\src\pywin32-210>python setup.py -q build
Building pywin32 2.3.210.0
PyACL.cpp
PyDEVMODE.cpp
PyHANDLE.cpp
PyIID.cpp
PyLARGE_INTEGER.cpp
PyOVERLAPPED.cpp
PySECURITY_ATTRIBUTES.cpp
PySECURITY_DESCRIPTOR.cpp
PySID.cpp
PyTime.cpp
PyUnicode.cpp
PyWAVEFORMATEX.cpp
PyWinTypesmodule.cpp
   Bibliothek build\temp.win32-2.3\Release\win32\src\pywintypes23.lib und Objekt
 build\temp.win32-2.3\Release\win32\src\pywintypes23.exp wird erstellt
uuid.lib(cguid_i.obj) : fatal error LNK1103: Debug-Informationen beschaedigt; Mo
dul muss neu kompiliert werden.
error: command '"C:\Programme\Microsoft Visual Studio\VC98\BIN\link.exe"' failed
 with exit status 1103

C:\usr\src\pywin32-210>




robert


From stephen04 at tiscali.co.uk  Mon Nov 20 18:28:12 2006
From: stephen04 at tiscali.co.uk (stephen04 at tiscali.co.uk)
Date: Mon, 20 Nov 2006 23:28:12 -0000
Subject: Programmatically replacing an API for another module
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
Message-ID: <45623a12_2@mk-nntp-2.news.uk.tiscali.com>

Tom i think i know what you are talking about. If i do then i have recently 
had to deal with something similar.

One approach could be to create a module that acts as an interface between 
your code and the api whos functions you wish to use.

The interface would consist of wrapper functions for all of the functions 
you wish to use. This interface will only include the wrappers for the api 
functions you will actually use.

Now you have created the interface you will need to import the module whose 
functions you want to wrap up in the interface.

At this point you can either import a stub or the real thing. The code 
snippet would look like this

try:
     import stub_api as api
except:
     import real_api as api

def get():
     return api.get()

.....................etc


So when you are testing you make sure that the stub_api module is available 
to the interface, the try will succeed and you will call stub functions. If 
you do not make the stub_api available then the try will fail, the exception 
will be handled by importing the real_api. In either case functions will be 
callable by using the api. as you have effectively renamed what is being 
imported to api.

The advantages of this are that you only make visible to your code the 
fuctions of the api that you are going to use. And you are isolating changes 
to code to the interface only.

Ok hope this helps.

Steve





"Tom Plunket" <tomas at fancy.org> wrote in message 
news:agb4m25v0o0silbl788qc6jqvk2kran4lv at 4ax.com...
> I've got a bunch of code that runs under a bunch of unit tests.  It'd
> be really handy if when testing I could supply replacement
> functionality to verify that the right things get called without those
> things actually getting called, since frequently those calls take a
> long time to execute and do things that, well, I don't really want to
> do.
>
> E.g. imagine you've got a routine which takes a filespec, generates a
> list of files, and copies those files from one location to another. (I
> realize that this example could be multiple functions that should be
> tested independently, but please bear with me.)  You don't actually
> want to do the file copy, but you want to make sure that the file copy
> API is appropriately called.
>
> Using win32com, I might then use win32file.CopyFile, but from testing
> code I'd like to replace that with a different call, a test function
> that I supply.  Ideally I could replace the whole module, after
> importing the module under test, I could do something like 'win32com =
> __dict__', and assuming I had a CopyFile function defined in the test
> module, it'd hook right in.  However, I'm suspicious that this
> wouldn't actually override the win32com seen by the other module that
> will actually do the execution (and I don't yet understand Python's
> execution model sufficiently).
>
> At present, ModuleTest.py does 'from Module import *' and then makes
> calls on Module without the "Module." decoration.  Since typically a
> file named SomeClass.py will only define the SomeClass class, this is
> more of a convenience than anything.  If this is a barrier to
> replacing APIs, though, well, I can change it.
>
> Any insight is helpful, thanks.
>
>
> -tom! 




From steve at holdenweb.com  Mon Nov 13 16:43:56 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 15:43:56 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558b437$0$32430$c3e8da3@news.astraweb.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <ejaosl$glg$1@sea.gmane.org>

John Salerno wrote:
> Fredrik Lundh wrote:
>> John Salerno wrote:
>>
>>>> Anyway, the FAQ answer seems to be a weak argument to me.
>>> I agree. I was expecting something more technical to justify the 
>>> colon, not just that it looks better.
>> yeah, the whole idea of treating programming languages as an interface 
>> between people and computers is really lame.  no wonder nobody's using 
>> Python for anything.
>>
>> </F>
>>
> 
> personally, i don't mind the colon and see no need to lose it, but if we 
> are talking in the realm of aesthetics, it actually seems like it would 
> be cleaner if it weren't there...sure, at first everyone who is used to 
> it might feel like something is missing, or the line is "hanging" open, 
> but overall the less characters, the better, right? isn't that why the 
> braces are gone?

No. The braces are gone because they don't assist a reader's 
determination of block structure like indentation does. Otherwise why 
would people write indenting pretty printers for C and the like?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jgodoy at gmail.com  Wed Nov  8 16:22:46 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Wed, 08 Nov 2006 19:22:46 -0200
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
	<eitahh$nov$1@panix3.panix.com>
	<mailman.1928.1163016034.11739.python-list@python.org>
Message-ID: <87slgt1vmh.fsf@gmail.com>

Cliff Wells <cliff at develix.com> writes:

> I think this sums up my point of view as well (although I would have
> used around 3215 more words to say it). 

Hmmmm...  Putting this on the discussion of the week: you'd have used
range(3215) or xrange(3215) more words?  ;-)

-- 
Jorge Godoy      <jgodoy at gmail.com>


From antroy at gmail.com  Thu Nov  9 08:16:15 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 05:16:15 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163066294.697993.148680@h48g2000cwc.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
Message-ID: <1163078175.600579.22930@h54g2000cwb.googlegroups.com>

> Vim, it can handle all the things.http://www.vim.org/

I'm not convinced of that quite yet. jEdit's syntax highlighting seems
more robust (see SocketServer.py in the standard library for an example
- vim gets the highlighting of the first doc-comment wrong). I've also
not found anything like jEdit's Console plugin for vim. It's
interactive. You can run the current buffer in the console window. The
console interacts with an error reporting pane which allows you to
click on the error and it will take you to the appropriate line in the
code that the stack trace indicates.

The only thing I have found for vim (and it is specific to running
Python code) is the runscript.vim plugin, which merely allows you to
view the stdout from the script in a different buffer. It doesn't allow
you to interact (say you are writing a console based interactive
application for example)  nor does it have all of those other features
I mentioned.

I'm very interested in other people's vim setup for Python coding
however, as I do use vim more than Python these days, mainly because I
have to use it a great deal on headless servers (jEdit would be no good
here of course) and I got fed up with adding artefacts such as
extraneous i's, o's and :w's into my code when working with jEdit ;-)
And it starts faster of course.



From deets at nospam.web.de  Sun Nov  5 18:11:02 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Nov 2006 00:11:02 +0100
Subject: Projecting MUD maps
In-Reply-To: <mailman.1793.1162765972.11739.python-list@python.org>
References: <mailman.1793.1162765972.11739.python-list@python.org>
Message-ID: <4r79c5Fptb28U1@uni-berlin.de>

BJ?rn Lindqvist schrieb:
> Hello, I'm looking for an algorithm to project "MUD maps" such as the
> following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg
> 
> MUD:s consists of rooms, each rooms has up to four orthogonal edges
> (north, east, west and south) that connects it to another room. So it
> is very easy to model a MUD as a directed graph. But projecting the
> graph on a surface is very complicated. For example, Room A:s North
> edge may connect it to Room B. But Room B:s South edge may connect it
> to Room C. Or another tricky example: Room A:s East edge connects it
> to Room B, whose East edge connect it to Room C, whose North edge
> connects it to Room D, whose West edge connects it to Room E, whose
> South edge connects it to Room A. In that example, there would be a
> "hole" between Room D and E.


try graphviz. You can also annotate some compass information ther, I 
guess it should make for a better placement.

Diez


From larry.bates at websafe.com  Tue Nov 28 13:11:49 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Nov 2006 12:11:49 -0600
Subject: Simple text parsing gets difficult when line continues to next
	line
In-Reply-To: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
Message-ID: <DJ6dnZqywpac4fHYnZ2dnUVZ_vWdnZ2d@comcast.com>

Jacob Rael wrote:
> Hello,
> 
> I have a simple script to parse a text file (a visual basic program)
> and convert key parts to tcl. Since I am only working on specific
> sections and I need it quick, I decided not to learn/try a full blown
> parsing module. My simple script works well until it runs into
> functions that straddle multiple lines. For example:
> 
>   Call mass_write(&H0, &HF, &H4, &H0, &H5, &H0, &H6, &H0, &H7, &H0,
> &H8, &H0, _
>                 &H9, &H0, &HA, &H0, &HB, &H0, &HC, &H0, &HD, &H0, &HE,
> &H0, &HF, &H0, -1)
> 
> 
> I read in each line with:
> 
> for line in open(fileName).readlines():
> 
> I would line to identify if a line continues (if line.endswith('_'))
> and concate with the next line:
> 
> line = line + nextLine
> 
> How can I get the next line when I am in a for loop using readlines?
> 
> jr
> 
Something like (not tested):

fp=open(filename, 'r')
for line in fp:
    while line.rstrip().endswith('_'):
        line+=fp.next()


fp.close()

-Larry



From lucaberto at libero.it  Thu Nov 16 03:02:10 2006
From: lucaberto at libero.it (luca72)
Date: 16 Nov 2006 00:02:10 -0800
Subject: matplotlib real time grap.
Message-ID: <1163664130.657647.260620@e3g2000cwe.googlegroups.com>

Hello at all.
I need to do a real time plot where on the frame i have this like limit
line:
        import math
        dati = []
        for freq in range(int(freqiniziale), (int(freqfinale )+ 1)):
            forza = float(massa) * ((2*math.pi*freq)**2)/10
            dati.append(forza)
        ax1 = subplot(111)
        plot(dati)
        xlabel('Frequenza HZ')
        ylabel('Deg')
        title('Grafico Calibrazione')
        ax2 = twinx()
        plot([0.1,0.2,0.3],'r-')
        ylabel('Forza')
        ax2.yaxis.tick_right()
        #dlg = wx.FileDialog(self, "Choose a file", ".", "", "*.*",
wx.SAVE)
        #try:
          #  if dlg.ShowModal() == wx.ID_OK:
            #    filename = dlg.GetPath()

              #  savefig(filename+'.pdf')
        #finally:
          #  dlg.Destroy()
        show()

with this i have the grap on the screen but i have to update every time
that i receive others data coming from two instruments (10 seconds),
how i can update the grap?

Regards

Luca



From maxerickson at gmail.com  Fri Nov 10 12:03:20 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Fri, 10 Nov 2006 17:03:20 +0000 (UTC)
Subject: path.py and directory naming: trailing slash automatic?
References: <1163174332.182408.166820@f16g2000cwb.googlegroups.com>
Message-ID: <Xns98777A996B33Fmaxericksongmailcom@80.91.229.5>

"metaperl.mogd at gmail.com" <metaperl.mogd at gmail.com> wrote:

> Hi,
> 
> I'm a big fan of path.py. One thing that I think is a good idea
> is for directories to automatically have a slash appended to them
> if it is not automatically added. Eg:
> 
> from path import path
> 
> dir = path('/some/dir')
> 
> x = dir + "file" # should yield /some/dir/file
> 
> 
> I emailed the author of path.py but I think he must be extremely
> busy. It took him 2-3 weeks to answer my first email and it's
> been longer than that for the one I sent regarding this.
> 

just use '/' if that is what you want:

>>> from path import path
>>> d=path('/some/dir')
>>> d / "file"
path(u'/some/dir\\file')
>>> 

If + also did that, it would be more difficult to change the extension 
when renaming a file or whatever.

max



From kay.schluehr at gmx.net  Thu Nov 16 14:12:16 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Nov 2006 11:12:16 -0800
Subject: Fun with generators
Message-ID: <1163704336.777736.25480@m73g2000cwd.googlegroups.com>

While this has been possible before and I guess ( from somewhat
superficial reading ) Michael Sparks Kamaelia project is all about this
kind of stuff, Python 2.5 generators can be used trivially to turn
higher order functions like reduce or map into generators producing
streams. After reading a thread here on comp.lang.python initiated by
someone who gets nervous about reduce() is going away in Py3K one might
just respond that it's not a big deal: functions are out anyway,
dataflow and coroutines are in :)

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498264



From rvernica at gmail.com  Fri Nov 17 14:34:13 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 11:34:13 -0800
Subject: remove a list from a list
In-Reply-To: <455E0A20.9000509@tim.thechases.com>
References: <ejkv1u$ajf$1@sea.gmane.org>
	<455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>
	<455E0A20.9000509@tim.thechases.com>
Message-ID: <ejl2re$ns3$1@sea.gmane.org>

Yeah, I ended up doing a similar kind of loop. That is pretty messy.

Is there any other way?

Thanks,
Ray

Tim Chase wrote:
>> That is a nice solution.
>>
>> But, how about modifying the list in place?
>>
>> That is, l would become ['c', 'D'].
>>
>>>  >>> e = ['a', 'b', 'e']
>>>  >>> l = ['A', 'a', 'c', 'D', 'E']
>>>  >>> s = set(e)
>>>  >>> [x for x in l if x.lower() not in s]
>>> ['c', 'D']
> 
> 
> Well...changing the requirements midstream, eh? ;-)
> 
> You can just change that last item to be a reassignment if "l" is 
> all you care about:
> 
>  >>> l = [x for x in l ...]
> 
> Things get a bit hairier if you *must* do it in-place.  You'd 
> have to do something like this (untested)
> 
> for i in xrange(len(l), 0, -1):
> 	if l[i-1].lower() in s:
> 		del l[i-1]
> 
> 
> which should do the job.
> 
> -tkc
> 
> 
> 



From gagsl-py at yahoo.com.ar  Fri Nov 24 19:14:19 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 21:14:19 -0300
Subject: File upload from client application (non-form based upload)
In-Reply-To: <1164197318.244221.61540@m7g2000cwm.googlegroups.com>
References: <1164197318.244221.61540@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061124211030.03f4ea28@yahoo.com.ar>

At Wednesday 22/11/2006 09:08, stuart at microsoft.com wrote:

>I'm trying to write a Python script to receive and save a file on a web
>server that has been POST'ed from a client application.
>
>In essence, this is similar to handling a file upload from an HTML
>form. However, I can't use:
>
>form = cgi.FieldStorage()
>fileitem = form['file']
>
>since the file is not coming from a form, and hence I don't have a form
>field called 'file'.
>
>I have working server-side code in PHP to do this (error handling
>removed):
>
>$file = "./test.jpg";
>$file_handle = fopen($file,"w");
>$mydata = file_get_contents("php://input");
>fwrite($file_handle, $mydata);
>fclose($file_handle);
>
>What I need is a Python equivalent of the the above PHP script. The
>content-type in the POST header is currently set to
>"application/octet-stream" which works fine with the php code above.

You got rather close... "file" is not an item, it's an attribute, a 
file-like object already open:

form = cgi.FieldStorage()
fileitem = form.file
data = fileitem.read()


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Mon Nov 13 07:12:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 13:12:05 +0100
Subject: httplib.InvalidURL: nonnumeric port: For characters in the
	proxypassword in URL
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com><mailman.40.1163409170.32031.python-list@python.org>
	<1163419232.632721.192360@i42g2000cwa.googlegroups.com>
Message-ID: <ej9nel$cgb$1@sea.gmane.org>

"Phoe6" wrote:

>> if you want to prevent the URI parser from treating something as part of
>> the URI, you need to quote it:
>>
>>     pwd = urllib.quote(pwd, "")
>
> Tried this and did not work out. It ended up confusing urllib and
> urllib2 objects.

oh, please.  urllib.quote is a *function*; there's no way that calling that function
from code written for urllib2 will affect anything.

but you can access urllib.quote from the urllib2 namespace too.  it's actually the
very same function:

>>> urllib.quote
<function quote at 0x00F430F0>
>>> urllib2.quote
<function quote at 0x00F430F0>

(urllib2 imports lots of stuff from urllib)

> I dont want to import urllib, with the urllib2 itself wanted to work
> around this piece of code.

not wanting to solve a problem is a pretty lousy problem-solving strategy, really.

</F> 





From seandavi at gmail.com  Wed Nov 29 10:27:51 2006
From: seandavi at gmail.com (SeanDavis12)
Date: 29 Nov 2006 07:27:51 -0800
Subject: Calling functions with dynamic arguments
In-Reply-To: <ekk857$4lo$1@cernne03.cern.ch>
References: <1164812985.794957.26530@l12g2000cwl.googlegroups.com>
	<ekk857$4lo$1@cernne03.cern.ch>
Message-ID: <1164814071.821186.269680@h54g2000cwb.googlegroups.com>


Roberto Bonvallet wrote:
> SeanDavis12 wrote:
> > I have a dictionary like:
> >
> > {"a":1, "b":2}
> >
> > and I want to call a function:
> >
> > def func1(a=3,b=4):
> >    print a,b
> >
> > so that I get a=1,b=2, how can I go about that?
> 
> func1(**yourdict)

Thanks, Roberto.  

Sean



From bootiack at yahoo.com  Thu Nov 30 03:19:09 2006
From: bootiack at yahoo.com (gavino)
Date: 30 Nov 2006 00:19:09 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164764454.043697.125730@j72g2000cwa.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
Message-ID: <1164874749.914101.32410@16g2000cwy.googlegroups.com>


gregarican wrote:
> gavino wrote:
> > wtf
>
> You have to be trolling I would think. For most people I think they
> would like to code in Python if they had a personal choice. But for
> professional reasons they are likely forced to code in Java because of
> the sheep mentality of the large corporate drone-dom that's out there.
> To me, languages such as Smalltalk, Python, and Ruby allow the problems
> to solve themselves in code that's easier to read and requires less
> verbiage. Meanwhile all of Java's semicolons, curly braces, and
> syntactical hoops leaves my fingers tired and my eyes crossed.

I want to learn to program and I can't seem to pick a direction.  A
java guy I know makes a lot of $, but a lot of reading I have done
shows lisp smalltalk and haskell to be really nice, as well as of
course python.  It seems python is 4/5 way to lisp yet has a lot of
people using it for practical things.  I also hear that it dominates in
leaving readable code behind it.  Am I listening to too much marketing
from non dominant tools?  I hear again and again how java is just
putrid.  My instict says learn something like scheme but my smal
experience sees only java people making money.. aggkk!!



From DustanGroups at gmail.com  Sat Nov 11 18:48:05 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 15:48:05 -0800
Subject: reduce to be removed?
In-Reply-To: <mailman.2116.1163286891.11739.python-list@python.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
Message-ID: <1163288885.884417.218270@f16g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> Dustan wrote:
>
> > It's always nice to know there are such good-natured people ready to
> > help on this group.
>
> any special reason why you keep pretending that some random wikipedia
> editor knows more about a future Python release than the people that
> develops Python ?

Be careful how you word that - this is the first time I've ever
referenced wikipedia in a question on this forum.

> > Anyway, I figured out a way to get the builtin
> > function 'sum' to work as I need:
> > sum([[1,2,3],[4,5,6],[7,8,9]],  [])
>
> sum() is designed for adding numbers, not sequences.  abusing it
> for sequences leads to inefficient code, and extremely bad worst-
> case behaviour, since you end up copying the same data over and
> over and over again

Thanks for some quality feedback for a change. Why can't you do that
more often?

> -- the function even checks for strings for
> this very reason:
>
>  >>> sum(["123", "456", "789"], "")
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> TypeError: sum() can't sum strings [use ''.join(seq) instead]
>
> (maybe it should check for other well-known containers as well?)
>
> if you care about writing robust code, why not just use a for-loop,
> and the list extend method?

Because I'm embedding this expression in a list comprehension (as I
stated in my original post), and last time I checked, it's not possible
to treat a for-loop as an expression (which is what a list
comprehension requires).

> </F>



From lycka at carmen.se  Thu Nov 16 04:52:54 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 16 Nov 2006 10:52:54 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558b437$0$32430$c3e8da3@news.astraweb.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <ejhcdm$3pv$1@wake.carmen.se>

John Salerno wrote:
> personally, i don't mind the colon and see no need to lose it, but if we 
> are talking in the realm of aesthetics, it actually seems like it would 
> be cleaner if it weren't there...sure, at first everyone who is used to 
> it might feel like something is missing, or the line is "hanging" open, 
> but overall the less characters, the better, right? isn't that why the 
> braces are gone?

Which is the better writing style for text intended for human readers?

I have some things to say:
     Seagulls belong in the sky.
     Colon fits in the text.

I have some things to say
{
     Seagulls belong in the text.
     Colon fits in the belly.
}



From onurb at xiludom.gro  Wed Nov 22 08:38:56 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 22 Nov 2006 14:38:56 +0100
Subject: Method argument names
In-Reply-To: <1164202574.147454.80620@j44g2000cwa.googlegroups.com>
References: <1164202574.147454.80620@j44g2000cwa.googlegroups.com>
Message-ID: <456452f1$0$10390$426a74cc@news.free.fr>

martinskou at gmail.com wrote:
> Hi
> 
> Having a method:
> 
> def method(self,x,y):
> 
> is it possible to discover, from outside the method, that the methods
> arguments are ['self', 'x', 'y']?

import inspect
help(inspect.getargspec)

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Wed Nov  1 02:45:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 08:45:51 +0100
Subject: Updating XML using XPath
In-Reply-To: <1162355693.760367.114040@i42g2000cwa.googlegroups.com>
References: <1162355693.760367.114040@i42g2000cwa.googlegroups.com>
Message-ID: <ei9jbe$3ab$2@sea.gmane.org>

marijuanated at gmail.com wrote:

> Is there a way that I can update the attributes of an XML node and MAKE
> IT PERSISTENT in the XML file through the Python XPath API? I tried the
> setContent method of the Node but i am only able to update the node
> variable not the file content itself. 

how about saving the DOM tree when you're done modifying it?

</F>



From raphael.badeau at yahoo.fr  Tue Nov 28 00:56:37 2006
From: raphael.badeau at yahoo.fr (Raphael)
Date: Mon, 27 Nov 2006 21:56:37 -0800
Subject: splitting a long string into a list
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
Message-ID: <J9FF6E.130o@beaver.cs.washington.edu>

What exactly seems to be the problem?


"ronrsr" <ronrsr at gmail.com> wrote in message 
news:1164692082.272978.66720 at 14g2000cws.googlegroups.com...
>I have a single long string - I'd like to split it into a list of
> unique keywords. Sadly, the database wasn't designed to do this, so I
> must do this in Python - I'm having some trouble using the .split()
> function, it doesn't seem to do what I want it to - any ideas?
>
> thanks very much for your help.
>
> r-sr- 




From fredrik at pythonware.com  Tue Nov 28 11:21:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 17:21:44 +0100
Subject: HTML Table-of-Content Extraction Script
In-Reply-To: <ekh4bn$782$1@news.albasani.net>
References: <ekh4bn$782$1@news.albasani.net>
Message-ID: <ekhnmo$3q5$2@sea.gmane.org>

robert wrote:

> I'm looking for a function which extracts a table of contents
 > of HTML file(s) from <Hx....><a name=...></a>...</Hx>
 > and possibly auto-creates the ancors.
> Maybe something already exists?

that's the kind of stuff you'll write in approximately two minutes using 
BeautifulSoup (or if you prefer the ElementTree API, ElementSoup).

start here:

     http://www.crummy.com/software/BeautifulSoup/

</F>



From gagsl-py at yahoo.com.ar  Thu Nov 16 18:41:02 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 20:41:02 -0300
Subject: deciding what is a dir (folder) in a zip file
In-Reply-To: <1163684892.073310.195950@k70g2000cwa.googlegroups.com>
References: <1163684892.073310.195950@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061116201418.03b33450@yahoo.com.ar>

At Thursday 16/11/2006 10:48, Jim wrote:

>I'm trying to read .zip files and drop from the listing those files
>that are directories.  I'm using the zipfile module.
>
>Googling has increased my suspicion that
>it is not just a matter of seeing if the file name ends in '/' and that
>the relevant external file attribute seems to have different values for
>people from different platforms, so just experimenting on my platform
>doesn't seem to be a safe solution.

Ending in / appears to be enough. Filenames are stored using / in 
Windows or Linux, using winzip, gzip and winrar at least.
Notice that no ordering is implied: directories may come _after_ 
filenames inside it.
This fragment extracts all ZipFile contents, maintaining directory structure:

--- cut ---
zf = ZipFile(zfname, 'r')
try:
     # creo todos los subdirectorios que existen en el zip
     # (vienen en cualquier orden)
     namelist = list(zf.namelist())
     namelist.sort(key=lambda n:len(n))
     for fn in namelist:
         if fn.endswith('/'):
             fullfn = os.path.join(tmpdir, *fn[:-1].split('/'))
             if not os.path.isdir(fullfn):
                 os.makedirs(fullfn)

     # extraigo todos los archivos, respetando sus directorios
     for fn in namelist:
         if fn.endswith('/'):
             continue
         fullfn = os.path.join(tmpdir, *fn.split('/'))
         ofile = open(fullfn, 'wb')
         ofile.write(zf.read(fn))
         ofile.close()
         # mantener fecha/hora
         dt = zf.getinfo(fn).date_time
         ft = time.mktime((dt[0],dt[1],dt[2],dt[3],dt[4],dt[5],0,0,-1))
         os.utime(fullfn, (ft,ft))
finally:
     zf.close()
--- cut ---


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From nospam at domain.tld  Thu Nov 16 07:52:25 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 16 Nov 2006 13:52:25 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<455c54c4$1@quokka.wn.com.au>
Message-ID: <ejhmu9$3pq$1@kohl.informatik.uni-bremen.de>

timmy <"timothy at open-networks.net"> wrote:

>> count and limit the number of evaluation steps allowed for untrusted
>> script or methods in untrusted script as well as to limit the recursion
>> depth or memory to be allocated.
> 
> idunno sounds like a lot of trouble to engineer a solution that has
> already got a solution. all win NT systems have resource managment and i
> imagine OS X would as well??

Sounds very likely, but does not solve the problem. With resource management
on the OS level you can indeed set some important limits for untrusted
scripts, but there are at least two drawbacks, which come to my mind (and
maybe more, that I'm not aware of): 1. OS level can always only implement
the lowest common denominator of all OS resource managements to be platform
independent, which is a strong requirement, IMO. 2. If you want to exec a
untrusted script from inside a trusted interpreter giving it a sandbox,
then the sandbox has the same OS level restrictions as the first
interpreter (except when started in a separate process, which makes
communication between trusted and untrusted parts much more complicated).
Also you can't have such a fine grained control over the untrusted
execution environment at the OS level, e.g. limiting the recursion depth,
which is a very important limit for secure interpreters. Limiting the stack
on the OS level is for example no solution for this, because the byte code
may behave completely different on the stack (and regarding hidden internal
recursion) as what the toplevel Python code does (does anyone understand,
what I'm talking about... - I think I just reached the recurion limit of my
english capabilities), which means that you can't set deterministic
restrictions for untrusted code in a platform independent manner at the OS
level. - Managing all this in the interpreter would solve the problem, at
the cost of implementing lots of resource management code. A good sandbox
seems to be a real adventure with few survivors, as can be seen in the
JavaScript-world.

Regards
Stephan




From wo_shi_big_stomach at mac.com  Sat Nov 25 23:29:32 2006
From: wo_shi_big_stomach at mac.com (wo_shi_big_stomach)
Date: Sat, 25 Nov 2006 20:29:32 -0800
Subject: combining the path and fileinput modules SOLVED
In-Reply-To: <tv1ah.3127$ql2.930@newsread3.news.pas.earthlink.net>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
	<7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
	<mailman.719.1164470313.32031.python-list@python.org>
	<tv1ah.3127$ql2.930@newsread3.news.pas.earthlink.net>
Message-ID: <4569182C.4040206@mac.com>

Dennis Lee Bieber wrote:
> On Sat, 25 Nov 2006 07:58:26 -0800, wo_shi_big_stomach
> <wo_shi_big_stomach at mac.com> declaimed the following in
> comp.lang.python:
> 
>>   File "p2.py", line 23, in ?
>>     for line in fileinput.input(f,):
>>   File
>> "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/fileinput.py",
>> line 231, in next
>>     line = self.readline()
>>   File
>> "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/fileinput.py",
>> line 320, in readline
>>     self._file = open(self._filename, "r")
>>
>> This looks similar to before -- fileinput.input() still isn't operating
>> on the input.
>>
> 	And where is the actual exception message line -- the one with the
> error code/description.
>  
> 
>> dir = path('/home/wsbs/Maildir')
>> #for f in dir.walkfiles('*'):
>> for f in filter(os.path.isfile, dir.walkfiles('*')):
> 
> 	If I understand the documentation of fileinput, you shouldn't even
> need this output loop; fileinput is designed to expect a list of files
> (that it works with a single file seems an afterthought)

Yes, thanks. This is the key point.

Feeding fileinput.input() a list rather than a single file (or whatever
it's called in Python) got my program working. Thanks!

> 
>> 	for line in fileinput.input(f,):
> 	for line in fileinput.input(filter(os.path.isfile, 
> 							dir.walkfiles("*")),
> 							inplace=1):
> 
> should handle all the files... 

Indeed it does -- too many times.

Sorry, but this (and the program you provided) iterate over the entire
list N times, where N is the number of files, rather than doing one
iteration on each file.

For instance, using your program with inplace editing and a ".bak" file
extension for the originals, I ended up with filenames like
name.bak.bak.bak.bak.bak in a directory with five files in it.

I don't have this third party path
> module, so the directory tree walking isn't active, but...

The path module:

http://www.jorendorff.com/articles/python/path/

is a *lot* cleaner than os.path; see the examples at that URL.

Thanks for the great tip about fileinput.input(), and thanks to all who
answered my query. I've pasted the working code below.

/wsbs

import fileinput
import os
import re
import string
import sys
from path import path

# p2.py - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with "From "
# for each match, program deletes line

# recurse dirs
dir = path('/home/wsbs/Maildir')
g = dir.walkfiles('*')
for line in fileinput.input(g, inplace=1, backup='.bak'):
# just print 2nd and subsequent lines
	if not fileinput.isfirstline():
		print line.rstrip('\n')
	# check first line only
	elif fileinput.isfirstline():
		if not re.search('^From ',line):
			print line.rstrip('\n')
fileinput.close()


From g.brandl-nospam at gmx.net  Mon Nov 13 11:30:54 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 13 Nov 2006 17:30:54 +0100
Subject: Python 3000 idea -- + on iterables -> itertools.chain
In-Reply-To: <1163415597.022620.153310@b28g2000cwb.googlegroups.com>
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<ej993b$tt7$1@news.albasani.net>
	<1163415597.022620.153310@b28g2000cwb.googlegroups.com>
Message-ID: <eja6k4$8k0$1@news.albasani.net>

Carl Banks wrote:
> Georg Brandl wrote:
>> What has a better chance of success in my eyes is an extension to yield
>> all items from an iterable without using an explicit for loop: instead of
>>
>> for item in iterable:
>>      yield item
>>
>> you could write
>>
>> yield from iterable
>>
>> or
>>
>> yield *iterable
> 
> Since this is nothing but an alternate way to spell a very specific
> (and not-too-common) for loop, I expect this has zero chance of
> success.

well, it could also be optimized internally, i.e. with a new opcode.

Georg


From robert.kern at gmail.com  Sat Nov 25 19:18:53 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 25 Nov 2006 18:18:53 -0600
Subject: my small hashlib - using pythons hash-functions
In-Reply-To: <ekaccd$807$1@sea.gmane.org>
References: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>	<7x7ixjp7c2.fsf@ruckus.brouhaha.com>	<4568b17a$0$11868$3b214f66@tunews.univie.ac.at>
	<ekaccd$807$1@sea.gmane.org>
Message-ID: <ekamhu$v9v$1@sea.gmane.org>

Fredrik Lundh wrote:
> Mathias Panzenboeck wrote:
> 
>> But the question is: *IS* this derived work? I mean, it's not copied code.
>> It's the same hashing-logic, which I learned by watching pythons code.
> 
> given that it's only a few lines of code, and there's hardly any other 
> way to write those lines if you want to implement the same algorithm, 
> I'd say it falls under "fair use".  crediting the Python developers in 
> the source code should be good enough.

If you'll forgive my pedantry, that's not "fair use," but simply the use of
material that cannot be copyrighted by itself (in many jursidictions, at least)
because it is so short, obvious, non-creative, etc.

A good overview of fair use is here:

http://fairuse.stanford.edu/Copyright_and_Fair_Use_Overview/chapter9/index.html

IANAL. TINLA.

-- 
Robert Kern

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



From gagsl-py at yahoo.com.ar  Wed Nov  8 14:55:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 16:55:40 -0300
Subject: Problem exiting application in Windows Console.
In-Reply-To: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108164423.05a82ec0@yahoo.com.ar>

At Wednesday 8/11/2006 09:10, Ant wrote:

[getting a stack trace for SystemExit instead of a clean exit]

>class HelpHTTPRequestHandler(SimpleHTTPRequestHandler):
>     def do_GET(self):
>         print "PATH: ", self.path
>         if self.path.endswith("quit.html"):
>             print "Exiting..."
>             sys.exit(0)
>         else:
>             return SimpleHTTPRequestHandler.do_GET(self)
>
>def help(base_dir, server_class=HTTPServer,
>handler_class=HelpHTTPRequestHandler):
>     os.chdir(base_dir)
>     server_address = ('', 8000)
>     httpd = server_class(server_address, handler_class)
>     server_thread = Thread(target=httpd.serve_forever)
>     server_thread.start()
>
>     webbrowser.open("http://localhost:8000/index.html")
>
>     print "Hit CTRL-Break or CTRL-C to exit server"

Replace serve_forever with your own loop checking an exit flag, and 
set the flag in your "quit.html" handler instead of sys.exit(0)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 12 05:43:59 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 21:43:59 +1100
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
	<mailman.1.1163325764.32031.python-list@python.org>
Message-ID: <pan.2006.11.12.10.43.58.262311@REMOVE.THIS.cybersource.com.au>

On Sun, 12 Nov 2006 20:38:31 +1100, Ben Finney wrote:

> But you try to tell people overseas about this legislation, and they
> just don't believe you.

Ha! You were lucky. When I was a lad, we had to write our postcodes on
envelopes in balanced ternary.


-- 
Steven.



From vatamane at gmail.com  Fri Nov 10 22:28:10 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 10 Nov 2006 19:28:10 -0800
Subject: PDF to text script
References: <1163188222.330683.9160@e3g2000cwe.googlegroups.com>
Message-ID: <1163215690.262530.214010@i42g2000cwa.googlegroups.com>

Vyz wrote:
> I am looking for a PDF to text script. I am working with multibyte
> language PDFs on Windows Xp. I need to batch convert them to text and
> feed into an encoding converter program
>
> Thanks for any help in this regard

Multibyte languages are not easy.  I do text extraction from PDF but 1)
I do it on Linux and 2) I only need English text. The utility I use is
pdftotext that comes as part of XPDF *nix package.

The other problem however, is not with the extraction but with the fact
that after you extract the text, it might not look very good.  In other
words, the extraction program will never complain but will nevertheless
produce garbage.  Then you have to process the result yourself. For
example, whitespace is not consistent, sometimes there will be extra
whitespace -- sometimes there won't be enough for example " S o m  e
  w ordsloo l i k e t his" and so on...

The real answer is that pdf text extraction is pretty hard. It is a
1000x better to get a hold of the original source...

Nick V.



From inq1ltd at verizon.net  Thu Nov  9 20:44:19 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 09 Nov 2006 20:44:19 -0500
Subject: Tkinter check box behaviour - Windows / Linux discrepancy
In-Reply-To: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
References: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>
Message-ID: <200611092044.19152.inq1ltd@verizon.net>

Peter,
You already have an answer to you question but if 
you want to fancy up your program you could 
replace;


       
self.chkTest.bind('<ButtonRelease-1>',
self.chkTest_click)
>
with
>
self.chkTest.bind('<f2>',self.chkTest_click0)

or some other acceptable key from the keyboard
>


def chkTest_click0(self,event):
    self.chkTest_click()


def chkTest_click(self):
         # read check box state and display
   appropriate text 
   if self.intTest.get()==0:
             self.lblTest.config(text='Check box
         cleared') 
   else:
             self.lblTest.config(text='Check box
 set')



jim-on-linux
http://www.inqvista.com



On Thursday 09 November 2006 18:28, peter wrote:
> I've come across a weird difference between the
> behaviour of the Tkinter checkbox in Windows
> and Linux.  The issue became apparent in some
> code I wrote to display an image in a fixed
> size canvas widget. If a checkbox was set then
> the image should be shrunk as necessary to fit
> the canvas while if cleared it should appear
> full size with scrollbars if necessary.
>
> The code worked fine under Linux (where it was
> developed).  But under Windows, the first click
> in the checkbox did nothing, then subsequent
> clicks adjusted the size according to the
> PREVIOUS, not the current, checkbox state.
>
> I've isolated the problem in the code below,
> which shows a single checkbox and a label to
> describe its state. It works ok under Linux,
> but in Windows it is always one click behind.
>
> Any ideas?  I am using
>    Linux: Fedora Core 3, Python 2.3.4
>    Windows: Windows NT, Python 2.3.4
>
> Peter
>
> ===============================================
>========================= import Tkinter as tk
>
>
>
> class App:
>
>     def __init__(self,frmMain):
>
>         """
>         Demonstrate difference in Windows /
> Linux handling of check box
>
>         Text in lblTest should track check box
> state """
>
>         # Set up form
>
>         self.intTest=tk.IntVar()
>
>        
> self.chkTest=tk.Checkbutton(frmMain,text='Click
> me!',variable=self.intTest)
>
>        
> self.chkTest.grid(row=0,column=0,padx=5,pady=5,
>sticky=tk.W)
>
>        
> self.chkTest.bind('<ButtonRelease-1>',self.chkT
>est_click)
>
>
>
>        
> self.lblTest=tk.Label(frmMain,text='Dummy')
>
>        
> self.lblTest.grid(row=1,column=0,padx=5,pady=5,
>sticky=tk.W)
>
>
>         self.chkTest_click() # so as to
> initialise text
>
>     def chkTest_click(self,event=None):
>         # read check box state and display
> appropriate text if self.intTest.get()==0:
>             self.lblTest.config(text='Check box
> cleared') else:
>             self.lblTest.config(text='Check box
> set')
>
>
>
>
> if __name__=='__main__':
>
>     frmMain=tk.Tk()
>
>     app=App(frmMain)
>
>     frmMain.mainloop()


From ray_usenet at yahoo.com  Fri Nov 10 01:00:55 2006
From: ray_usenet at yahoo.com (Ray)
Date: 9 Nov 2006 22:00:55 -0800
Subject: how is python not the same as java?
In-Reply-To: <1163136947.735028.95160@m73g2000cwd.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<1163136947.735028.95160@m73g2000cwd.googlegroups.com>
Message-ID: <1163138455.713334.204180@h48g2000cwc.googlegroups.com>


p.lavarre at ieee.org wrote:

> Jython exists.

And Pava (or Pyava) doesn't, you mean?



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 21:08:32 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 13:08:32 +1100
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
Message-ID: <pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>

On Sun, 12 Nov 2006 02:31:04 +0100, Fredrik Lundh wrote:

>> For example, I have a ZIP code 
>> database that can do some processing on its numbers, and the numbers are 
>> stored as floating point values (exactly) but Python doesn't get them 
>> right
> 
> sounds odd.  are you sure you don't mean "stored as strings containing 
> decimal numbers" ?
> 
> (who uses fractional ZIP codes, btw?)

Well, I can't speak for Americans, but here in Australia we typically give
our post codes to six decimal places:

Melbourne 3000.000000
Brunswick 3056.000000
Clifton Hill 3068.000000
Sydney 2000.000000
St Johns Park 2176.000000

and so forth. You can't have too much precision with those floating point
post/ZIP codes!


-- 
Steven.



From jmgimeno at gmail.com  Tue Nov  7 09:57:08 2006
From: jmgimeno at gmail.com (babui)
Date: 7 Nov 2006 06:57:08 -0800
Subject: __init__ function problem
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
	<pan.2006.11.07.14.39.04.730211@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162911428.266555.18650@e3g2000cwe.googlegroups.com>


Steven D'Aprano ha escrit:

> Once the __new__ method creates the instance and returns, before anything
> else happens, the instance's __init__ method is called.

This only happens when the object created by __new__ isinstance of the
class invoked in the creation statement, that is:

s=MagicStr("lala")

executes:

s = MagicStr.__new__(MagicStr, "lala")
if isinstance(s, MagicStr):
    type(s).__init__(s, "lala")

--
Juan M. Gimeno



From rudy.schockaert at gmail.com  Tue Nov 28 03:49:00 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Tue, 28 Nov 2006 09:49:00 +0100
Subject: Using SimpleXMLRPCServer in a Windows Service
In-Reply-To: <7.0.1.0.0.20061125003821.034c9810@yahoo.com.ar>
References: <60987dac0611230152r4af42ce6mfbbaf5a4409537ee@mail.gmail.com>
	<7.0.1.0.0.20061125003821.034c9810@yahoo.com.ar>
Message-ID: <60987dac0611280049t4138334r13ddbfb7c7236b5b@mail.gmail.com>

I found the problem.
Actually both pieces of code work now. The problem was that when I run
the SimpleXMLRPCService in a Windows Service, the STDERR needs to be
redirected to a real file. I guess some kind of buffer overflow occurs
when you don't do this.

I added the following lines:

<snip>
def SvcStop(self):
    sys.stdout = self.stdout
    sys.stderr = self.stderr
    .....


def SvcDoRun(self):
    self.stdout = sys.stdout
    self.stderr = sys.stderr
    sys.stdout = file("c:/temp/my.log", "a+", 0)
    sys.stderr = sys.stderr
    ....
</snip>


On11/25/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Thursday 23/11/2006 06:52, Rudy Schockaert wrote:
>
> >After some Googling I found a post of someone who wanted to do exactly
> >as what I want to do now.
> >There is however a problem in his code that makes the service fails
> >after the first connection. I slightly modified his code and now I can
> >run the service longer before I run into trouble.
> >I then tried making the SimpleXMLRPCServer multi-threaded, hoping the
> >problem would disappear, but no avail.
> >The code is as follows:
> >The commented part in the while loop is from the original code.
>
> The original (commented-out) code should be fine. You have to wait
> for 2 events: the service stop signal, or an incoming connection.
> Anyway, you always have to catch exceptions; override handle_error at least.
>
> Another approach (not involving events) would be to set a (not so
> big) timeout on the socket, and test for self.stop_requested on each iteration.
>
> >         server = ThreadedSimpleXMLRPCServer(("", 8080))
> >         object = OBJECT()
> >         server.register_instance(object)
> >         self.socket = server.socket
> >
> >         while 1:
> >             #win32file.WSAEventSelect(server,
> >self.hSockEvent,win32file.FD_ACCEPT)
> >             #rc =
> >win32event.WaitForMultipleObjects((self.hWaitStop,self.hSockEvent), 0,
> >win32event.INFINITE)
> >             #if rc == win32event.WAIT_OBJECT_0:
> >             #    break
> >             #else:
> >             #    server.handle_request()
> >             #    win32file.WSAEventSelect(server,self.hSockEvent, 0)
> >             #    #server.serve_forever()  ## Works, but breaks the
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar
>
>


From will at willNOmcguganSPAM.com  Wed Nov 29 17:44:14 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Wed, 29 Nov 2006 22:44:14 +0000
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164839790.959848.54570@l39g2000cwd.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e09b7$0$1505$db0fefd9@news.zen.co.uk>
	<1164839790.959848.54570@l39g2000cwd.googlegroups.com>
Message-ID: <456e0d41$0$18045$fa0fcedb@news.zen.co.uk>

Beliavsky wrote:

> 
> The number 1 is not generally considered to be a prime number -- see
> http://mathworld.wolfram.com/PrimeNumber.html .
> 

I stand corrected.

-- 
blog: http://www.willmcgugan.com


From gagsl-py at yahoo.com.ar  Sat Nov 25 01:46:15 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 25 Nov 2006 03:46:15 -0300
Subject: combining the path and fileinput modules
In-Reply-To: <4567B532.4030906@mac.com>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
Message-ID: <7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>

At Saturday 25/11/2006 00:14, wo_shi_big_stomach wrote:

> > The filter should be applied to walkfiles. Something like this:
> >
> > dir = path(/home/wsbs/Maildir)
> > for f in filter(os.path.isfile, dir.walkfiles('*')):
> >         #
> >         # test:
> >         # print f
>
>Thanks, this way f will print the full pathname/filename. But f already
>does that using Jason Orendorff's path module:
>
>dir = path('/home/wsbs/Maildir')
>for f in dir.walkfiles('*'):
>         print f

The filter is used to exclude directories. fileinput can't handle directories.

>At this point I believe the error has to do with fileinput, not the path
>or os.path modules.
>
>If I give fileinput.input() a hardcoded path/filename in place of 'f'
>the program runs. However the program will not accept either f or 'f' as
>an argument to fileinput.input().

Tried with (f,) ?
Notice that *this* error is not the same as your previous error.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From horpner at yahoo.com  Mon Nov  6 06:13:16 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: Mon, 06 Nov 2006 11:13:16 GMT
Subject: Projecting MUD maps
References: <mailman.1793.1162765972.11739.python-list@python.org>
Message-ID: <gNE3h.60$eb5.51@newsreading01.news.tds.net>

On 2006-11-05, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> Hello, I'm looking for an algorithm to project "MUD maps" such
> as the following map:
> http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg

Check out the Ruby project IFMapper for a mature project that
might accomplish your goal.  You can write a new back-end for it
to produce MUD code (so you can design your maps graphically), or
you can write a new front-end to interpret MUD code (so you can
make IF-Mapper draw maps for you game in progress).

http://ifmapper.rubyforge.org/

-- 
Neil Cerutti


From steve at rueb.com  Wed Nov 29 23:28:35 2006
From: steve at rueb.com (Steve Bergman)
Date: 29 Nov 2006 20:28:35 -0800
Subject: Why are slice indices the way they are in python?
Message-ID: <1164860915.349821.309920@14g2000cws.googlegroups.com>

A couple of off the wall questions.

It seems to me that there is usually a solid *reason* for things in
Python and I'm wondering about the rationale for the way slicing works:

my_string[2:5]

gets you the 3rd through the 3rd through the 5th character of the
string because indexing starts at 0 and you get everything up to, but
not including the second index.

Why?  It doesn't seem intuitive to me.  To me, it makes it harder, not
easier, to work with slices than if indexing started at 1 and  the
above expression got you the 2nd throught the 5th character.

Another thing that I've been puzzling over is the pow() function.

pow(x,y) gives x**y.  Fine.

But pow(x,y,z) gives (x**y) % c

I'm curious to know what the pressing reason for such a feature was.



From billpaterson2006 at googlemail.com  Tue Nov 14 05:55:43 2006
From: billpaterson2006 at googlemail.com (billpaterson2006 at googlemail.com)
Date: 14 Nov 2006 02:55:43 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <mailman.125.1163500986.32031.python-list@python.org>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<mailman.125.1163500986.32031.python-list@python.org>
Message-ID: <1163501742.957889.57410@m73g2000cwd.googlegroups.com>

Thanks so much, a really elegant solution indeed.

I have another question actually which I'm praying you can help me
with:

with regards to the .jpg conversion to .jpg]] and .gif -> .gif]]

this works, but only when .jpg/.gif is on it's own line.

i.e:

.jpg

will get converted to:

.jpg]]

but

Image:test.jpg

gets converted to:

[[Image:test.jpg

rather than

[[Image:test.jpg]]

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

Hope you can help again!  Cheers



From sjmachin at lexicon.net  Fri Nov 24 12:43:28 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 09:43:28 -0800
Subject: How do I access a main frunction from an import module?
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <1164390207.777502.24220@h54g2000cwb.googlegroups.com>

Jim wrote:
> Hi,
>
> I have created an import module.  And would like to access a function
> from the main script, e.g.,
>
> file abc.py:
> ###################
> def a():
>     m()
>     return None
> ####################
>
> file main.py:
> #####################
> from abc import *
> def m():
>     print 'something'
>     return None
>
> a()
> ######################
>
> python25.exe main.py
>

Although there are literally correct answers to your question, the best
answer is "Don't do that. You would be creating circular references
between modules, and run the risk of emulating the mythical ooloo bird
by disappearing up your own fundamental orifice". Some possible
practical solutions:

1. Put the m function in a 3rd file/module. Then any other module which
needs it can import/call.

2. If you think that's not a good idea, then put it in abc.py (it's not
used in main.py in your example).

3. Maybe this will suit what you are really trying to do:

 file abc.py:
 ###################
 def a(argfunc): # <<<<<=====
     argfunc() # <<<<<=====
 ####################

 file main.py:
 #####################
 from abc import *
 def m():
     print 'something'

 a(m) # <<<<<=====
 ######################

4. If you think *that's* not a good idea, then you might like to
explain at a higher level what you are *really* trying to achieve :-)
E.g. "Function m is one of n functions in main.py of which abc.py
may/must call 0, 1, or many because blah blah blah ..."

BTW, "return None" at the very end of a function is redundant. The
Python compiler generates "return None" automagically (implicitly!?)
instead of letting you fall off the end of the world. Which book or
tutorial are you using?

BTW #2: "python25.exe main.py" ?? If you are on Windows, have Python
2.4 as your default setup, and are trialling 2.5: you may like to ask
(in a new thread) about more convenient ways of doing it. Otherwise you
might like to tell what you are up to (in a new thread) so that your
problem can be diagnosed correctly and cured :-)

HTH,
John



From vatamane at gmail.com  Wed Nov  8 01:51:56 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 7 Nov 2006 22:51:56 -0800
Subject: unpickling Set as set
References: <1162967110.642248.54400@m7g2000cwm.googlegroups.com>
Message-ID: <1162968716.356479.124850@m7g2000cwm.googlegroups.com>


The two are not of the same type:

---------------------------------
In : import sets
In : s1=sets.Set([1,2,3])

In : s2=set([1,2,3])

In: type(s1)
Out: <class 'sets.Set'>

In : type(s2)
Out: <type 'set'>

In : s1==s2
Out: False   # oops!

In: s2==set(s1)
Out: True   # aha!
----------------------------------

You'll have to just cast:
 unpickled_set=set(unpickled_set)

-Nick V.


Amir  Michail wrote:
> Hi,
>
> Is there an easy way to unpickle the older Set as the newer set behind
> the scenes when using shelve?
> 
> Amir



From sjdevnull at yahoo.com  Mon Nov 13 16:21:22 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 13 Nov 2006 13:21:22 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.81.1163443844.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
	<1163353941.3497.45.camel@localhost.localdomain>
	<mailman.81.1163443844.32031.python-list@python.org>
Message-ID: <1163452882.237659.94330@b28g2000cwb.googlegroups.com>

Michael Hobbs wrote:
> No, old research does is not automatically invalidated, but
> out-of-context research is. I'm sure there's research somewhere proving
> that code written in ALL UPPERCASE is preferable, since it makes
> punched-cards easier to read by humans. Python 1.0 may have been a nice
> language for "newbies", with a lot of similarities to ABC, but there has
> been a lot of evolution since then. Sure, it's still very easy to teach
> basic Python, but if you're concerned about readability, take a look at
> any real-world Python app or library. You'll find it's filled with
> things such as "__getattr__", "__repr__", "__nonzero__", and
> "super(MyClass, self).__init__()". Hardly newbie stuff.

Really?

Just looking at our real-world Python code (roughly 325,000 lines of
code in about 5,000 files), I see:
3 classes define __getattr__
1 call to __getattr__, which is an upcall from within one of those 3
__getattr__ definitions
17 classes define __repr__
0 explicit __repr__ calls
0 calls or definitions of __nonzero__
0 calls to super

That's hardly "filled with" in my book.

Really, there are only 3 widely used __foo__ strings in most of the
real-world Python code I've seen; __init__, __name__=="__main__" tests,
and __class__.

Aside from those, I normally see __foo__ tags only where you'd really
expect to--custom importers, dictionaries with lazy value retrieval,
class definitions overriding default behavior, etc.  Not newbie stuff
at all, and not particularly common.

Of the 5,000 files we have, only 80 have any __foo__ tag aside from the
3 widely used ones.



From fredrik at dolda2000.com  Fri Nov 17 08:29:04 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Fri, 17 Nov 2006 14:29:04 +0100
Subject: Secure Python
In-Reply-To: <017e01c7094b$86c36ce0$03000080@hendrik>
References: <1163646179.11586.60.camel@pc7.dolda2000.com>
	<017e01c7094b$86c36ce0$03000080@hendrik>
Message-ID: <1163770144.24310.0.camel@pc7.dolda2000.com>

On Thu, 2006-11-16 at 08:43 +0200, Hendrik van Rooyen wrote:
>  "Fredrik Tolf" <fredrik at dolda2000.com> wrote:
> 
> > I was thinking that maybe it could be possible to load and run untrusted
> > Python code, simply by loading it in a module with a modified version of
> > __builtins__. Without any reachable function that do unsafe operations,
> > code running from there shouldn't be able to do evil things.
> 
> google for "sandbox"

I tried googling for various combinations of "sandbox", "python" and
some other keywords, but I could not find anything that seemed relevant.
Did you have any particular hit in mind?

Fredrik Tolf




From steve at holdenweb.com  Fri Nov  3 13:27:23 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 03 Nov 2006 18:27:23 +0000
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <200611031100.49503.inq1ltd@verizon.net>
References: <4549FA01.4090706@vtxmail.ch> <454A4E1D.8030106@vtxmail.ch>
	<454B423C.20400@holdenweb.com>
	<200611031100.49503.inq1ltd@verizon.net>
Message-ID: <454B8A0B.8010908@holdenweb.com>

jim-on-linux wrote:
> On Friday 03 November 2006 08:21, Steve Holden 
> wrote:
> 
>>Frederic Rentsch wrote:
>>
>>>jim-on-linux wrote:
>>>
>>>>Frederic,
>>>>
>>>>I've been trying to get back into my package
>>>>in the Cheese Shop for over a year. The
>>>>phone company changed my e:mail address and
>>>>to make a long and frustrating story short I
>>>>can't get back into the Cheese Shop to make
>>>>changes to my file.
>>>>
>>>>Time is money.  At some time you have to
>>>>consider if it is worth it.  At least you
>>>>have the name of your program listed.
>>>>
>>>>I wish I could be more helpfull. I'll watch
>>>>the responses you get from others.
>>>>
>>>>Good Luck,
>>>>jim-on-linux
>>>>
>>>>http://www.inqvista.com
>>>>
>>>>On Thursday 02 November 2006 09:00, you wrote:
>>>>
>>>>>Some time ago I had managed to upload a
>>>>>small package to the Cheese Shop using the
>>>>>data entry template. Uploading is in two
>>>>>steps: first the text then the package
>>>>>file. When I had a new version it went like
>>>>>this: The new text made a new page, but the
>>>>>new file went to the old
>>>>
>>>>snip
>>>
>>>Thanks for letting me know that I am not
>>>alone. Do you know of an alternative to the
>>>Cheese Shop?
>>
>>Surely the correct answer to this problem is to
>>get the Cheese Shop fixed, not to migrate away
>>from it? To whom (besides this list) have you
>>communicated the problem, and with what
>>results?
> 
> 
> I emailed and emailed,  I got one response but 
> nothing changed.
> 
> I suggest that the Cheese Shop also forward copies 
> of help request to a site like this or similar. 
> At least the sender knows that someone will read  
> the email and help is on the way.
> 
> Also, my guess is that before these postings of 
> the last few days, 65% of the people on this site 
> never heard of The Cheese Shop,  Postings like 
> these can only help The Cheese Shops.       
> 
> jim-on-linux
> 
> http://www.inqvista.com
> 
> 
> 
>>Remember that python.org is run by volunteers,
>>but they are mostly highly capable volunteers.
>>This is probably just a change situation that
>>wasn't anticipated in the design (we all make
>>mistakes).
>>
>>A simple change of email address could probably
>>be achieved by tweaking the data for one or two
>>individuals, and an automated solution should
>>clearly be added as volumes build up.
>>
>>For now, how about a link that causes someone
>>to receive email? I'd be surprised if this
>>couldn't be used to handle low-volume changes
>>with adequate security.
>>
I am forwarding this mail to the group that maintains the web site.

Note that

   http://cheeseshop.python.org/pypi

like most python.org pages does have a "report web site bug" link. I'm 
not sure whether this requires you to register for an account, as I know 
that Trac spam has been a problem, but there are ways to get the 
attention of the site maintainers (besides posting on c.l.py, where 
basically you are hoping that a webmaster or someone who knows the 
webmasters will see your message).

webmaster at python.org is another good address to remember ;-)

Anyway, I hope this gets the issue addressed. No promises, though: 
remember that all webmasters are volunteers.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden


From eric_brunel at despammed.com  Thu Nov 23 03:35:20 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 23 Nov 2006 09:35:20 +0100
Subject: utf - string translation
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
Message-ID: <op.tjgng6oqrqur0o@eb.pragmadev>

On Wed, 22 Nov 2006 22:59:01 +0100, John Machin <sjmachin at lexicon.net>  
wrote:
[snip]
> So why do you want to strip off accents? The history of communication
> has several examples of significant difference in meaning caused by
> minute differences in punctuation or accents including one of which you
> may have heard: a will that could be read (in part) as either "a chacun
> d'eux million francs" or "a chacun deux million francs" with the
> remainder to a 3rd party.

It may not be to store or even use the actual text. I stumbled on a  
problem like this some time ago: I had some code building an index for a  
document and wanted the entries starting with "e", "?", "?" or "?" to be  
in the same section...
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From bearophileHUGS at lycos.com  Wed Nov 22 21:11:04 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 18:11:04 -0800
Subject: Abelson and Python
In-Reply-To: <1164246961.951287.132170@j44g2000cwa.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
Message-ID: <1164247864.305277.314000@h54g2000cwb.googlegroups.com>

markscottwright:
> I love Python as much as the next guy, but I
> just don't see how SICP can be done in Python.

The contents of the course are probably different, they work on
robotics...

Bye,
bearophile



From johnjsal at NOSPAMgmail.com  Wed Nov  8 10:55:57 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 10:55:57 -0500
Subject: assigning values in __init__
In-Reply-To: <mailman.1865.1162939573.11739.python-list@python.org>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
Message-ID: <4551fe01$0$7047$c3e8da3@news.astraweb.com>

Ben Finney wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> 
>> But I do like Steve's suggestion that it's better to be explicit
>> about each attribute, instead of just accepting a list of numbers
>> (but I can't help but feel that for some reason this is better,
>> because it's more general).
> 
> If you pass a *mapping* of the "I-might-want-to-add-more-in-the-future"
> values, then you get both explicit *and* expandable, without an
> arbitrary unneeded sequence.
> 

Do you mean by using the **kwargs parameter? If I do this, doesn't it 
mean that *anything* could be added though? Misspelled words and 
completely unrelated attributes as well?

Or does this matter as long as you are handling the processing yourself 
internally and not allowing users access to the Character class?


From sjmachin at lexicon.net  Fri Nov 10 15:36:26 2006
From: sjmachin at lexicon.net (John Machin)
Date: 10 Nov 2006 12:36:26 -0800
Subject: how is python not the same as java?
In-Reply-To: <mailman.2035.1163170200.11739.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<mailman.2035.1163170200.11739.python-list@python.org>
Message-ID: <1163190986.892964.74670@m73g2000cwd.googlegroups.com>


Jorge Vargas wrote:
> On 9 Nov 2006 18:09:37 -0800, John Machin <sjmachin at lexicon.net> wrote:
> >
> > Jorge Vargas wrote:
> > > On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
> > > > both are interpreted oo langauges......
> > > >
> > > that is not correct java is compiled and the VM interprets the code
> >
> > ... and what do you think is in those pesky little .pyc files you may
> > have noticed lying around on your hard disk?
> >
> can you open a commandline and start writting java code? no

If not, then java lacks functionality -- but that (like *all* your
quibbles below) has nothing to do with the fundamental point: both
languages compile into an intermediate form which is then interprerted.

>
> the division between java (runtime) and javac is very explicit, the
> compiler catches a lot of things, in python this is threaded in a
> totally different way.

Again, irrelevant.

>
> the pyc files are just a "catching" system for the common python
> developer,

Do you mean "caching"?

> as for the java developer the .class files are executable
> code.

So are .pyc files.

> In python noone runs the pyc files, the interpreter takes care
> of this for you.

Python is more functional, but again this has nothing to do with the
question.



From hannibal.holm at gmail.com  Thu Nov  2 13:26:37 2006
From: hannibal.holm at gmail.com (hannibal.holm at gmail.com)
Date: 2 Nov 2006 10:26:37 -0800
Subject: refcounting errors???
Message-ID: <1162491997.320068.243850@h48g2000cwc.googlegroups.com>

Hi,

I have a few problems with the C-API. I am trying to embed Python in a
simulator that I am writing (I am replacing my previous Guile-based
scripting system (mostly as pyrex is a lot nicer than swig and the fact
that PyUnit is really nice)).

Non the less, my problems come when dealing with callbacks from my
C-code to python 2.4.4.

This is the python code that is executed (through PyRun_SimpleFile):
----------
import io
import config
config.setScreenSize(800, 600)

def foo(a, b, c):
    print a, b, c

io.registerButtonHandler("foo", foo) # register foo as io-callback
io.bindKeyUp("a", "foo")                     # bind the a-key to the
foo function
----------
Where io and config are two pyrex generated modules.

Now, when I start tapping the a-key foo is activated (and prints its
arguments), but is only done so 8 times, on the 9th time the app
crashes in the internal_print function invoked by the print-statement.

The registration of the callback is done by

    Py_INCREF(f);
    ah->u.button.u.s = f;

The invokation of the foo-function goes somewhere in the line of:

            PyObject *up = PyBool_FromLong(1L);
            if (! up) PyErr_Print();

            PyObject *res = PyObject_CallFunction(action.u.button.u.s,
"(NIH)",
                up, (unsigned int)key, (unsigned short)special);
            if (! res) PyErr_Print();

            Py_XDECREF(res);
            Py_XDECREF(up);

I would suppose that I have made a mistake somewhere, but cannot really
figure out what. So I would appreciate any pointers on what I can have
done wrong.


Best regards and thanks in advance,
Mattias



From robert.kern at gmail.com  Fri Nov  3 12:51:03 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 03 Nov 2006 09:51:03 -0800
Subject: Python in sci/tech applications
In-Reply-To: <eifub5$ak9$1@news.albasani.net>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>	<mailman.1678.1162491833.11739.python-list@python.org>	<eiden1$sj0$1@news.albasani.net>	<eifg8f$96s$1@wake.carmen.se>	<mailman.1715.1162568469.11739.python-list@python.org>
	<eifub5$ak9$1@news.albasani.net>
Message-ID: <eifvi9$ue2$1@sea.gmane.org>

robert wrote:
> In past I asked for linking Python2.5 and next Pythons on Win against such standard DLL (MSVCRT4 or MSVCRT.DLL)- yet Martin v. L?wis somehow explained in  
> http://groups.google.de/group/comp.lang.python/msg/fcbe41f9df595c35
> somehow that MSVCRT.dll is not intended for normal apps - only for "system-level components". 
> 
> Now I'm stun that MingW by default works with that library by default!

This is what Martin said:

"""
It used to be possible to link with it. See

http://msdn2.microsoft.com/en-us/library/abx4dbyh(VS.80).aspx

This is now a "known DLL", and meant for use by system-level components
only.
"""

Note the words "used to" and "now". Mingw is a somewhat old project and was 
initially developed at a time when MSVCRT.dll *was* intended to be used by 
applications. It simply hasn't received enough attention recently to move to a 
different runtime. If you would like to volunteer your time to do the necessary 
work to allow it to link to modern runtimes, please do so. You will receive the 
undying thanks of many, many Pythoneers.

-- 
Robert Kern

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



From bjourne at gmail.com  Mon Nov  6 07:25:57 2006
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 6 Nov 2006 12:25:57 +0000
Subject: Projecting MUD maps
In-Reply-To: <4r79c5Fptb28U1@uni-berlin.de>
References: <mailman.1793.1162765972.11739.python-list@python.org>
	<4r79c5Fptb28U1@uni-berlin.de>
Message-ID: <740c3aec0611060425l795a974m999efb87ffd879bb@mail.gmail.com>

On 11/5/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> BJ?rn Lindqvist schrieb:
> > Hello, I'm looking for an algorithm to project "MUD maps" such as the
> > following map: http://www.aww-mud.org/maps/MUD_Maps/Caerin-colour.jpg
> >
> > MUD:s consists of rooms, each rooms has up to four orthogonal edges
> > (north, east, west and south) that connects it to another room. So it
> > is very easy to model a MUD as a directed graph. But projecting the
> > graph on a surface is very complicated. For example, Room A:s North
> > edge may connect it to Room B. But Room B:s South edge may connect it
> > to Room C. Or another tricky example: Room A:s East edge connects it
> > to Room B, whose East edge connect it to Room C, whose North edge
> > connects it to Room D, whose West edge connects it to Room E, whose
> > South edge connects it to Room A. In that example, there would be a
> > "hole" between Room D and E.
>
>
> try graphviz. You can also annotate some compass information ther, I
> guess it should make for a better placement.

Sorry, I think everyone misunderstood what my problem is. Which is not
very strange since I see now that I didn't explain it very well.

In the code below, I have created a simple Room class. It has up to
four edges; north, east, west and south. The Room class also has the
method get_projection() which recursively traverses through all
reachable rooms in the graphs and gives them x,y coordinates and
returns a dict containing x,y-coordinates and rooms. The function
project_dict() simply plots the dict on stdout.

The main() function demonstrates how a map consisting of nine rooms
should be plotted. All well so far. But if there had been an east-west
edge from G to I, then that edge would have overlapped C:s position.
That would have been wrong and I want the algorithm in
get_projection() to detect such overlaps and automatically fix them.
In this case, the fix would have been to add 2 to G and I:s
y-coordinate. Then the east-west edge from G to I wouldn't overlap any
room.

So I wonder if there is any algorithm that can do what I'm asking for?

----------------------- mudgraph.py -----------------------
# -*- coding: utf-8 -*-
import sys

class Dir:
    dirs = ['n', 'e', 's', 'w']
    @classmethod
    def opposite(cls, dir):
        """
        Return the opposite direction, i.e Dir.opposite('n') => 's'.
        """
        opp_idx = (Dir.dirs.index(dir) + 2) % 4
        return Dir.dirs[opp_idx]

class Room:
    """
    A Room is a node in a mud map. Each room can have up to four
    connections (edges) to other rooms in the cardinal directions;
    north, east, south and west.
    """
    def __init__(self, name = None):
        self.name = name or "+"
        self.n = None
        self.s = None
        self.e = None
        self.w = None

    def connect(self, dir, room):
        """
        Create an edge dir from self to room. Also create an edge in
        the opposite direction from room to self.
        """
        setattr(self, dir, room)
        setattr(room, Dir.opposite(dir), self)

    def north(self, room):
        self.connect('n', room)

    def east(self, room):
        self.connect('e', room)

    def west(self, room):
        self.connect('w', room)

    def south(self, room):
        self.connect('s', room)

    def get_projection(self, x = 0, y = 0,
                       proj_dict = None,
                       visited = None):
        """
        Return a dictionary containing all Rooms in the map as
        values. Each key is the projected x and y position of the
        room.
        """
        if proj_dict is None:
            proj_dict = {}
        if visited is None:
            visited = set()
        visited.add(self)
        proj_dict[x, y] = self
        if self.n and not self.n in visited:
            self.n.get_projection(x, y - 1, proj_dict, visited)
        if self.e and not self.e in visited:
            self.e.get_projection(x + 1, y, proj_dict, visited)
        if self.w and not self.w in visited:
            self.w.get_projection(x - 1, y, proj_dict, visited)
        if self.s and not self.s in visited:
            self.s.get_projection(x, y + 1, proj_dict, visited)
        return proj_dict

def project_dict(dict):
    coords = dict.keys()

    max_x = 0
    max_y = 0
    min_x = 999
    min_y = 999
    for x, y in coords:
        if x > max_x:
            max_x = x
        elif x < min_x:
            min_x = x
        if y > max_y:
            max_y = y
        elif y < min_y:
            min_y = y

    max_x += 1
    max_y += 1
    for y in range(min_y, max_y):
        x_range = range(min_x, max_x)
        for x in x_range:
            if dict.has_key((x, y)) and dict[x, y].n:
                sys.stdout.write(" | ")
            else:
                sys.stdout.write("   ")
        sys.stdout.write("\n")
        for x in x_range:
            if dict.has_key((x, y)):
                room = dict[x, y]
                if room.w:
                    sys.stdout.write("-")
                else:
                    sys.stdout.write(" ")
                sys.stdout.write(room.name)
                if room.e:
                    sys.stdout.write("-")
                else:
                    sys.stdout.write(" ")
            else:
                sys.stdout.write("   ")
        sys.stdout.write("\n")
        for x in x_range:
            if dict.has_key((x, y)) and dict[x, y].s:
                sys.stdout.write(" | ")
            else:
                sys.stdout.write("   ")
        sys.stdout.write("\n")

def main():
    a = Room('A')
    b = Room('B')
    c = Room('C')
    d = Room('D')
    e = Room('E')
    f = Room('F')
    g = Room('G')
    h = Room('H')
    i = Room('I')

    a.east(b)
    b.south(c)
    b.east(h)
    c.south(d)
    a.north(e)
    a.west(f)
    f.south(g)
    i.north(h)


    dict = a.get_projection()

    project_dict(dict)

if __name__ == "__main__":
    main()


-- 
mvh Bj?rn


From bearophileHUGS at lycos.com  Wed Nov  1 12:58:19 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Nov 2006 09:58:19 -0800
Subject: Style for modules with lots of constants
In-Reply-To: <Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
	<Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1162403899.125501.59310@b28g2000cwb.googlegroups.com>

Rob Williscroft:
> This is nice, but you can cut down on some of the cruft:
>
> class Constants( object ):
>   pass
>
> Constants.RIGHT = 0
> Constants.LEFT = 1
>
> ## client code ...
> print Constants.LEFT

Another possibility is to define such constants as strings instead of
integers:

_allflags = ("left",
             "right",
             # other constants...
             # other constants...
            )

class Flags(): pass

for _flag in _allflags:
    setattr(Flags, _flag, _flag)

#print Flags.__dict__

Then the user can use Flags.left+" "+Flags.... , or just the "left"
string.
Then maybe for each attribute like the "left" constant, a "left_doc"
attribute can be added to Flags with a textual explanation of the
meaning of the "left" constant.

If your module has a short name, then maybe it's better to just use
such string constants as modulename.constant instead of Flags.constant,
 using globals()[_flag] = _flag

Bye,
bearophile



From antroy at gmail.com  Mon Nov 20 03:16:15 2006
From: antroy at gmail.com (Ant)
Date: 20 Nov 2006 00:16:15 -0800
Subject: rpncalc-2.5 RPN Calculator for Python
In-Reply-To: <1164009539.310173.248620@m7g2000cwm.googlegroups.com>
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>
	<mailman.491.1164004338.32031.python-list@python.org>
	<1164009539.310173.248620@m7g2000cwm.googlegroups.com>
Message-ID: <1164010575.812704.120600@f16g2000cwb.googlegroups.com>


> name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT

Lukershavik IIRC. At least that's how I was told it was pronounced (I
had to say the damn name many times in presentations whilst using his
algebras to model three-valued logic. Don't know if there were many
Poles there to criticise mind ;-) )



From simonwittber at gmail.com  Mon Nov  6 00:22:45 2006
From: simonwittber at gmail.com (Simon Wittber)
Date: 5 Nov 2006 21:22:45 -0800
Subject: Python Distilled
Message-ID: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>

I want to build a Python2.5 interpreter for an embedded system. I only
have 4MB of RAM to play with, so I want to really minimise the python
binary.

Things I can think of removing safely are:
 - Unicode
 - Long numbers
 - Complex number
 - Compiler / Parser
 - Thread support
 - OS specific stuff

I'd also like to remove any deprecated or stuff which is left in for
backwards functionality (eg Classic classes).

Google tells me that people have done this before, back in Python1.5.2
days. Has anyone tried to do this recently with a more modern Python?

-Sw.



From nicolasg at gmail.com  Wed Nov  8 19:18:34 2006
From: nicolasg at gmail.com (Nicolas G)
Date: Thu, 9 Nov 2006 02:18:34 +0200
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>
References: <B57127370.889.19118.1@mxextra>
	<9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>
Message-ID: <7d2580610611081618g69db3e25k6d21cd6d1f15d8a7@mail.gmail.com>

On 11/9/06, Tim Williams <tim at tdw.net> wrote:
>
> On 8 Nov 2006 15:35:31 -0800, NicolasG <nicolasg at gmail.com> wrote:
> > How can I use python to get the real IP address of my DSL router (when
> > my PC is part of the local home LAN) ?
>
> The router will the PC's default gateway IP address,  if you are on a
> windows platform,  you can view it by typing IPCONFIG (enter) from a
> command prompt.


This is the  router local IP, I need to get the router "outside" IP witch is
the real one.

A quick google, gave me this,  look at the comments at the end for an
> example of finding the Default Gateway IP address using Python
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994


import win32api raise the error "module not exsit"
and
socket.gethostbyname(name)

the router doesn't have a hostname.

cheers ;)

-- 
Nicolas G

Skype: nicolasg_
mobile: +30 69 45 714 578
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From nun at example.com  Tue Nov 28 19:24:45 2006
From: nun at example.com (Mitja Trampus)
Date: Wed, 29 Nov 2006 01:24:45 +0100
Subject: Really closing stdout (was: "fork and exit" needed?)
In-Reply-To: <slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
Message-ID: <hr4bh.504$Ib3.364308@news.siol.net>

Nick Craig-Wood wrote:

>>> open STDOUT, '>/dev/null'; 
>>  sys.stdout = open(os.devnull, 'w') 
> $ ls -l /proc/32004/fd
> total 4
> lrwx------ 1 ncw ncw 64 Nov 28 09:55 0 -> /dev/pts/17
> lrwx------ 1 ncw ncw 64 Nov 28 09:55 1 -> /dev/pts/17
> lrwx------ 1 ncw ncw 64 Nov 28 09:55 2 -> /dev/pts/17
> l-wx------ 1 ncw ncw 64 Nov 28 09:55 3 -> /dev/null
> 
> I'm not sure how you do open stdout to /dev/null in python though!
> I suspect something like this...
>   import posix
>   posix.close(1)
>   posix.open("/dev/null", posix.O_WRONLY)

Yes, you're close enough... The explanations are here:
http://www.google.com/search?q=python%20close%20stdout,
I like this one in particular:
http://www.python.org/infogami-faq/library/why-doesn-t-closing-sys-stdout-stdin-stderr-really-close-it/

If you explicitly want to leave file descriptors 0-2 present 
(Do you gain anything by not closing them? If you know, do 
tell...), but pointing do /dev/null, you could do:

null = os.open(os.devnull,os.O_WRONLY)
os.dup2(null,0)
os.dup2(null,1)
os.dup2(null,2)
os.close(null)

Untested.

More info on file descriptors and python here:
http://docs.python.org/lib/os-fd-ops.html

Mitja


From B.Ogryczak at gmail.com  Thu Nov 30 09:31:46 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 30 Nov 2006 06:31:46 -0800
Subject: pickle and infinity
In-Reply-To: <12mrplbrrn4il70@corp.supernews.com>
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
	<mailman.844.1164823762.32031.python-list@python.org>
	<1164824790.211227.305300@14g2000cws.googlegroups.com>
	<12mrplbrrn4il70@corp.supernews.com>
Message-ID: <1164897106.593493.178850@f1g2000cwa.googlegroups.com>


Grant Edwards wrote:
> On 2006-11-29, Bart Ogryczak <B.Ogryczak at gmail.com> wrote:
> >
> > Fredrik Lundh wrote:
> >> Bart Ogryczak wrote:
> >>
> >> > I?ve got this problem with pickle, it seems it doesn?t handle
> >> > correctly infinite values (nor does Python return overflow/underflow
> >> > error).
> >>
> >> Python 2.X relies on the C library to serialize floats, and, as you've
> >> noticed, some C libraries can produce values that they themselves cannot
> >> read.
> >
> > Actually I?d be very happy, if Python would throw FloatPointExeption,
> > rather then allow infinite values.
>
> I'd be very unhappy.  I use both NaNs and infinities in many
> programs, so it needs to be selectable should that feature be
> added.

Like I?ve said. I?d be satisfied with something like fpectl, which
gives you option to either throw FloatPointExeption or go on with NaNs
and infs. NaNs and infinities are pain in the a** if you?re
integrating with C libraries or you?re using pickle, pyro, whatever.
The problem is, that the error pops out in the middle of the code that
really has nothing to do with the actual erroneous calculation. Its
impossible to trace back where the hell the NaN or infinite value comes
from.

> > Haven?t got idea how to do it. fpectl would do the trick, but
> > it?s not present nither on Solaris, nor on Windows platform.
> > And I?d need it on both.
>
> In my experience anything than needs to be portable and
> involves NaN, inf, or denormals is rather painful.

That?s not very comforting :-/



From fivenastydisco at hotmail.com  Thu Nov  9 13:02:03 2006
From: fivenastydisco at hotmail.com (donkeyboy)
Date: 9 Nov 2006 10:02:03 -0800
Subject: Newb: installing Jython on Windows XP ...
Message-ID: <1163095323.668867.58320@i42g2000cwa.googlegroups.com>

All,

I'm having issues installing Jython on Windows XP. I've looked on the
web and this newsgroup but to no avail. Any suggestions? The shell
listing is below:

NB I've got Cygwin installed, hence the Unix 'ls' on a Windows box

C:\>cd Jython

C:\Jython>ls
jython_21.class

C:\Jython>ls "c:\Program Files\Java\jdk1.5.0_09\bin\java.exe"
c:\Program Files\Java\jdk1.5.0_09\bin\java.exe

C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython_21
Exception in thread "main" java.lang.NoClassDefFoundError: jython_21

C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython-21
Exception in thread "main" java.lang.NoClassDefFoundError: jython-21

Any help would be of great use!!!



From tdelaney at avaya.com  Mon Nov 27 23:17:24 2006
From: tdelaney at avaya.com (Delaney)
Date: Tue, 28 Nov 2006 15:17:24 +1100
Subject: super() and type()
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EBFB@au3010avexu1.global.avaya.com>

Carl Banks wrote:

> Unfortunately, short of hackery, you're stuck with having to write out
> super(C,self).

For my version of that particular hackery ...
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286195

Tim Delaney


From martin at v.loewis.de  Wed Nov  8 16:14:20 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Nov 2006 22:14:20 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162992063.382185.5440@h48g2000cwc.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<1162939715.915139.146890@b28g2000cwb.googlegroups.com>
	<455166B6.6040009@v.loewis.de>
	<1162992063.382185.5440@h48g2000cwc.googlegroups.com>
Message-ID: <455248ac$0$23938$9b622d9e@news.freenet.de>

Ross Ridge schrieb:
> The problem your describing isn't that reference counting hasn't been
> made safe.  What you and Joe seem to be trying to say is that atomic
> increment and decrement instructions alone don't make accessing shared
> structure members safe.

All I can do is to repeat Joe's words literally
"Atomic increment and decrement instructions are not by themselves
sufficient to make reference counting safe."

Replace "by themselves" with "alone", and "reference counting"
with "reference counting in the presence of shared structure
members", and you find that your statement and Joe's are equivalent.
*Of course* reference counting is about shared structure members.
That's it's primary purpose.

Regards,
Martin


From timothy at open-networks.net  Sun Nov  5 18:11:36 2006
From: timothy at open-networks.net (timmy)
Date: Mon, 06 Nov 2006 09:11:36 +1000
Subject: SPE editor slow?
Message-ID: <454e6f35@quokka.wn.com.au>

hello i've been using the SPE editor on a moderately large project and 
it's constantly pausing during editing, like it's attempting to check 
something as i edit.
as you can imagine a 4 second pause every few characters is EXTREMELY 
annoying when you just want to get some work done. i really like SPE's 
layout and features but if it's going to be dogshit slow all the time 
i'll have to change. please help!


From detlev at die-offenbachs.de  Sun Nov 12 05:55:58 2006
From: detlev at die-offenbachs.de (Detlev Offenbach)
Date: Sun, 12 Nov 2006 11:55:58 +0100
Subject: ANN: version 3.9.2 of eric3 available
Message-ID: <ej6uju$b6t$1@online.de>

Hi,

this is to informe you about the availability of eric3 v 3.9.2. This is
bug fix release with some new features. It is available via

http://www.die-offenbachs.de/detlev/eric.html

Changelog:
- bug fixes
- added support for new QScintilla stuff 
  (e.g. autocomplete from document and APIs)
- extended debugger to not set the encoding (configurable)
- added keyboard shortcuts for the shell
  -- to clear the shell
  -- for all zoom aczions (zoom in, zoom out, zoom)
- added the tool eric3-configure to setup eric3 without the need
  to start the IDE

Regards,
Detlev
-- 
Detlev Offenbach
detlev at die-offenbachs.de


From john.hicken at gmail.com  Tue Nov 28 06:21:45 2006
From: john.hicken at gmail.com (John Hicken)
Date: 28 Nov 2006 03:21:45 -0800
Subject: Modifying every alternate element of a sequence
In-Reply-To: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <1164712905.785689.193390@45g2000cws.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
>
> input = [1,2,3,4,5,6]
> wanted = [1,-2,3,-4,5,-6]
>
> I can implement it like this:
>
> input = range(3,12)
> wanted = []
> for (i,v) in enumerate(input):
>     if i%2 == 0:
>         wanted.append(v)
>     else:
>         wanted.append(-v)
>
> But is there any other better way to do this.
>
> --
> Suresh

I would tend to do this as a list comprehension. In python 2.5 you can
do this:

wanted = [(v if i % 2 == 0 else -v) for (i,v) in enumerate(input)]

(a if b else c) is new to Python 2.5. You don't always need the
brackets, but I think it makes things clearer. See
(http://docs.python.org/whatsnew/pep-308.html) for more details on this
feature.

With earlier versions, you could do

wanted = [v - 2*(i % 2) for (i,v) in enumerate(input)]

That looks less clear to me than your version, though.

John Hicken



From roger.miller at nova-sol.com  Wed Nov  1 15:48:03 2006
From: roger.miller at nova-sol.com (Roger Miller)
Date: 1 Nov 2006 12:48:03 -0800
Subject: uninstall and Windows file associations
Message-ID: <1162414083.490714.313860@e3g2000cwe.googlegroups.com>

When I installed Python 2.5 (on Windows XP) I left 2.4 in place "just
in case". Today I decided to remove it. However after doing so (from
the control panel) I found that Windows no longer knows about the
Python file types and associations. Is this behavior expected, or was
there something wrong with my installation? Is there a way to restore
the file associations, short of reinstalling 2.5 or manually editing
them?



From martin.witte at gmail.com  Thu Nov  2 06:28:16 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 2 Nov 2006 03:28:16 -0800
Subject: other ways to check for <type 'function'>?
In-Reply-To: <4549cf05$0$9363$426a74cc@news.free.fr>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>
	<4549cf05$0$9363$426a74cc@news.free.fr>
Message-ID: <1162466896.660320.112140@e3g2000cwe.googlegroups.com>


Christophe wrote:
> Sybren Stuvel a ?crit :
> > elderic enlightened us with:
> >> are there other ways than the ones below to check for <type
> >> 'function'> in a python script?
> >
> > First of all, why would you want to? If you want to call the object
> > as a function, just do so. Handle the exception that is raised when
> > it's raised.
>
> I don't think it's a good idea because when you place a try catch block
> around a function call, you'll catch any exception thrown by the
> function itself and not only the "cannot be called" exception.

A little experimentation shows that when something is not callable
always a TypeError which evaluates to "'<type>' object is not
callable", so you can refine the try/catch with this information

py> x = 1
py> x()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
py> x = ''
py> x()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'str' object is not callable
py> class x:
...     pass
...
py> x()
<__main__.x instance at 0x1002eef38>
py> def x():
py.     pass
py. 
py> x()



From Roberto.Bonvallet at cern.ch  Wed Nov 29 11:29:42 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 29 Nov 2006 16:29:42 +0000 (UTC)
Subject: How to detect what type a variable is?
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
	<1164817535.636391.294310@n67g2000cwd.googlegroups.com>
Message-ID: <ekkchm$6e3$2@cernne03.cern.ch>

Leandro Ardissone wrote:
> And how I can compare this "<type 'str'>" output ?
> I want to decide what to do if the var is an string and what to do if
> not..
> 
> Tried with:
> if type(artistList) == "<type 'list'>":
> 
> and
> if type(artistList) == "list":
> 
> but nothing..

type() doesn't return a string, it returns a type object.
You should try this:

    if isinstance(artistList, list):
	...

Cheers,
-- 
Roberto Bonvallet


From jacob at cd.chalmers.se  Sun Nov 12 06:47:29 2006
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Sun, 12 Nov 2006 11:47:29 +0000 (UTC)
Subject: Python component model
References: <W5wWg.7118$Y24.2917@newsread4.news.pas.earthlink.net>
	<1160696330.090125.212900@h48g2000cwc.googlegroups.com>
Message-ID: <ej71kh$v3n$1@gide.ita.chalmers.se>

In article <1160696330.090125.212900 at h48g2000cwc.googlegroups.com>,
Peter Wang <misterwang at gmail.com> wrote:
...
>functions at ever higher levels of abstraction, or to have a
>proliferation of nebulously-defined "manager" objects.)  IMHO once you
>cross this chasm and are able to model your problem domain with live
>objects that go off and automatically respond to the runtime
>environment and Do the Right Thing, it's very hard to go back to a dead
>object mindset.  I can understand, however, that until one makes this
>leap, it might seem like an academic and useless distinction.

I'm not disagreeing with the blessings of components reacting to events
and going off Doing the Right Thing. However, there is a huge with
components going off Doing the Wrong Thing. It becomes exceedingly
hard to debug for several reasons. The first one is that it is difficult
to trace the callbacks generated, since the point where they were
registered is no longer trackable when your problem occurs. The second
and most serious problem is that erroneous behaviour in two components
can interact in extremely mysterious ways that are really difficult to
debug.

In part these problems can be reduced by much rigorous testing of each
component than is the norm today, but for the really tough problems we
need tools that have not been invented yet, that track the history
of each callback. Since these tools have to understand the details
of the calling conventions and registration mechanism for events, they
have to be custom built for each component framework and should therefore
be part of the framework distribution.

Jacob Hall?n

-- 


From anthra.norell at vtxmail.ch  Tue Nov 14 12:26:57 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Tue, 14 Nov 2006 18:26:57 +0100
Subject: Seeking assistance - string processing.
In-Reply-To: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
Message-ID: <4559FC61.8030306@vtxmail.ch>

billpaterson2006 at googlemail.com wrote:
> I've been working on some code to search for specific textstrings and
> act upon them insome way. I've got the conversion sorted however there
> is 1 problem remaining.
>
> I am trying to work out how to make it find a string like this "==="
> and when it has found it, I want it to add "===" to the end of the
> line.
>
> For example.
>
> The text file contains this:
>
> ===Heading
>
> and I am trying to make it be processed and outputted as a .dat file
> with the contents
>
> ===Heading===
>
> Here's the code I have got so far.
>
> import string
> import glob
> import os
>
> mydir = os.getcwd()
> newdir = mydir#+"\\Test\\";
>
> for filename in glob.glob1(newdir,"*.txt"):
>     #print "This is an input file: " + filename
>     fileloc = newdir+"\\"+filename
>     #print fileloc
>
>     outputname = filename
>     outputfile = string.replace(outputname,'.txt','.dat')
>     #print filename
>     #print a
>
>     print "This is an input file: " + filename + ".  Output file:
> "+outputfile
>
>     #temp = newdir + "\\" + outputfile
>     #print temp
>
>
>     fpi = open(fileloc);
>     fpo = open(outputfile,"w+");
>
>     output_lines = []
>     lines = fpi.readlines()
>
>     for line in lines:
>         if line.rfind("--------------------") is not -1:
>             new = line.replace("--------------------","----")
>         elif line.rfind("img:") is not -1:
>             new = line.replace("img:","[[Image:")
>         elif line.rfind(".jpg") is not -1:
>             new = line.replace(".jpg",".jpg]]")
>         elif line.rfind(".gif") is not -1:
>             new = line.replace(".gif",".gif]]")
>         else:
>             output_lines.append(line);
>             continue
>         output_lines.append(new);
>
> for line in output_lines:
>     fpo.write(line)
>
> fpi.close()
> fpo.flush()
> fpo.close()
>
>
> I hope this gets formatted correctly :-p
>
> Cheers, hope you can help.
>
>   

Here's a suggestion:

 >>> import SE
 >>> Editor = SE.SE ('--------------------==----  img:=[[Image: 
.jpg=.jpg]] .gif=.gif]]')
 >>> Editor ('--------------------  img: .jpg .gif')    # See if it works
'------------------------  [[Image: .jpg]] .gif]]'

It works. (Add in other replacements if the need arises.)

Works linewise

 >>> for line in f:
          new_line = Editor 
(line)                                                       
          ...

Or filewise, which comes in handy in your case:

 >>> for in_filename in glob.glob (newdir+'/*.txt'):
          out_filename = in_filename.replace ('.txt','.dat')
          Editor (in_filename, out_filename)


See if that helps. Find SE here: http://cheeseshop.python.org/pypi/SE/2.3

Frederic




From skip at pobox.com  Fri Nov 10 14:31:13 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 10 Nov 2006 13:31:13 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej2gp9$1qc$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2gp9$1qc$1@sea.gmane.org>
Message-ID: <17748.54145.204700.69619@montanaro.dyndns.org>

Replying via Steve's not to (I think) a comment from Michael Hobbs
(apologies to Steve):

    >> The FAQ says that the colon increases readability, but I'm
    >> skeptical. The indentation seems to provide more than enough of a
    >> visual clue as to where the if conditional ends.

I use four-space indents whenever possible.  If I have a multi-line
condition I find that the condition indents to the same level as the the
indented block, e.g.:

    # Oh, wait, I shouldn't have typed that colon just now!  It's not
    # necessary.  Oh, darn.  Hmmm... What does Strunk say?
    if (some_long_expression and
        some_other_long_expression and
        yet_another_long_expression):
        that_was_a_long_expression = True

I don't know if this is just a shortcoming of the style I use to break lines
in a long expression or what, but the colon makes it clear where the
condition ends and the indented block begins.

Skip


From gagsl-py at yahoo.com.ar  Wed Nov  8 21:43:34 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 23:43:34 -0300
Subject: is this the right way to do subclasses?
In-Reply-To: <871wodmmgi.fsf@benfinney.id.au>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<871wodmmgi.fsf@benfinney.id.au>
Message-ID: <7.0.1.0.0.20061108233333.05ac46f0@yahoo.com.ar>

At Wednesday 8/11/2006 22:35, Ben Finney wrote:

>     class Character(object):
>         stat_keys = ['strength', 'dexterity', 'intelligence']
>         def __init__(self, name, stats):
>             self.name = name
>             self.health = 10
>             self.stats = {}
>             for (key, value) in [(k, stats.get(k)) for k in stat_keys]:
>                 setattr(self, key, value)

Doesn't work, should say self.stat_keys. I prefer this other way:

=== cut ===
class Character(object):
     stat_keys = ['strength', 'dexterity', 'intelligence']
     strength = dexterity = intelligence = 0
     def __init__(self, name, **stats):
         self.name = name
         self.health = 10
         for key, value in stats.iteritems():
             if key in self.stat_keys: setattr(self, key, value)
             else: raise KeyError, "Unknown stats name: %s" % key

class Cleric(Character):
     stat_keys = Character.stat_keys + ['holyness']
     holyness = 0

c=Cleric('Fray Tuck', strength=8, dexterity=5, holyness=2)
print vars(c)
=== cut ===

This way, misspelled properties are caught, and calling interfase is 
simple too. Also, class attributes provide default instance 
attributes - you don't have to provide an explicit value. Stats names 
are extensible as shown.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Mon Nov 20 02:00:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 08:00:52 +0100
Subject: re.match -- not greedy?
In-Reply-To: <1163981503.295521.7180@m7g2000cwm.googlegroups.com>
References: <mailman.476.1163979600.32031.python-list@python.org>
	<1163981503.295521.7180@m7g2000cwm.googlegroups.com>
Message-ID: <ejrjr5$mip$1@sea.gmane.org>

Carl Banks wrote:

 > I'm suddenly curious if there are any cases at all where greediness
 > changes whether it finds a match.

the "|" operator picks the leftmost subpattern that matches in any way, 
so the *overall* greediness of a Python RE can vary.  e.g.

     re.match("(ab?a|a.a+)", "abaaaaaaaa")

matches three characters, not ten.

</F>



From gagsl-py at yahoo.com.ar  Tue Nov  7 12:26:18 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 14:26:18 -0300
Subject: But it was yesterday here!
In-Reply-To: <20061107162436.99027.qmail@web56003.mail.re3.yahoo.com>
References: <20061107162436.99027.qmail@web56003.mail.re3.yahoo.com>
Message-ID: <7.0.1.0.0.20061107142409.0468fda0@yahoo.com.ar>

At Tuesday 7/11/2006 13:24, Sorin Schwimmer wrote:

>I'm trying to use the smtplib - I did it so many times already. The 
>import statement fails, as the
>SMTP name cannot be imported. Digging more, I found that SMTP fails because
>email.base64MIME cannot be imported (ImportError:No module named base64MIME).
>I don't understand why, as the file is in the right location, has 
>the correct access rights (I'm on
>Linux), and it's content is not corrupt. I also tried to import 
>email.__init__ and end up with the same error.
>
>The only way that works is to navigate to the email directory and 
>perform the import base64MIME there.
>
>What may have happened?

I bet you have an email.py somewhere in your sources...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From hoendech at ecc.lu  Fri Nov 24 17:08:28 2006
From: hoendech at ecc.lu (Stefaan A Eeckels)
Date: Fri, 24 Nov 2006 23:08:28 +0100
Subject: Python popenX() slowness on AIX?
References: <1164059636.171319.121310@j44g2000cwa.googlegroups.com>
	<gmB8h.46111$39.18831@southeast.rr.com>
	<1164117707.309823.237640@j44g2000cwa.googlegroups.com>
	<1164119554.955532.236180@b28g2000cwb.googlegroups.com>
	<1164124553.907183.261220@m7g2000cwm.googlegroups.com>
	<1164142934.364814.191210@m73g2000cwd.googlegroups.com>
	<20061122000251.56e894dd.hoendech@ecc.lu>
	<1164387821.375946.191430@m7g2000cwm.googlegroups.com>
Message-ID: <20061124230828.d8075dd2.hoendech@ecc.lu>

On 24 Nov 2006 09:03:41 -0800
allenjo5 at mail.northgrum.com wrote:

> Stefaan A Eeckels wrote:
> > On 21 Nov 2006 13:02:14 -0800
> > allenjo5 at mail.northgrum.com wrote:
> >
> > > The fact that it does this in Python code instead of C is the main
> > > cause of the slowness.  So, unless Python is changed to do this
> > > in C, it's always going to be slow on AIX :-(
> >
> > I guess that the reason it's slow is that there are many
> > descriptors to try and close. Reducing them using ulimit -n could
> > improve the speed.
> >
> > AIX has a fcntl command to close all open file descriptors from a
> > descriptor onwards:
> >
> > fcntl(3, F_CLOSEM);
> >
> > This of course should be used instead of the loop:
> >
> > 10 happens to be the value of F_CLOSEM (from /usr/include/fcntl.h).
> > I've currently no access to an AIX system with Python, but it could
> > be worth trying.
> 
> Yes, very much worth it.  F_CLOSEM is _so_ much better than the loop,
> even in C.   Using your brilliant suggestion, I now have a simple
> patch to the python source that implements it for any OS that happens
> to have the fcntl F_CLOSEM option.   

The *BSDs and Solaris have "closefrom(3)" which does the same as
F_CLOSEM in AIX. As with AIX, the speedup is dramatic when there are a
lot of file descriptors to try and close.

> It is below in its entirety.  I believe I got the try: stuff correct,
> but since I'm new to Python, I'd appreciate any comments.

I'm no great Python specialist myself. I'll leave it to those better
qualified to comment.

> I have another patch to implement my os.rclose(x,y) method, which
> would improve the speed of popenX() for the OSes that don't have
> F_CLOSEM, by doing the close() loop in C instead of Python,  but I
> don't know if it would be as likely to be accepted as this probably
> would be.
> 
> Now, where do I send my proposed patch for consideration?

The README file in the Python distribution has the following to say:

Patches and contributions
-------------------------

To submit a patch or other contribution, please use the Python Patch
Manager at http://sourceforge.net/patch/?group_id=5470.  Guidelines
for patch submission may be found at http://www.python.org/patches/.

Take care,

-- 
Stefaan A Eeckels
-- 
Never explain by malice what can be adequately explained by stupidity.
However:
Sufficiently advanced stupidity is indistinguishable from malice.


From rw at smsnet.pl  Wed Nov 29 03:03:29 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: 29 Nov 2006 00:03:29 -0800
Subject: Question about import and sys.path
In-Reply-To: <1164779632.560938.111260@l12g2000cwl.googlegroups.com>
References: <1164700262.370760.129210@l12g2000cwl.googlegroups.com>
	<1164725294.490337.224430@l12g2000cwl.googlegroups.com>
	<1164779632.560938.111260@l12g2000cwl.googlegroups.com>
Message-ID: <1164787409.741343.42000@14g2000cws.googlegroups.com>


Frank Millman wrote:

> One small point. The docs have the following warning -
>
> "Important: the caller is responsible for closing the file argument, if
> it was not None, even when an exception is raised. This is best done
> using a try ... finally statement. "
>
> I have added this to my code.
>
> I wonder if you can avoid this in 2.5 by using the 'with' statement. I
> am still using 2.4, so I cannot test. Anyway, your suggestion does
> exactly what I want, and it works perfectly.

Yes, of course. The `with` statement works exactly
as previously try...finally. I've tried it in 2.5 and it works
perfectly.
You have to use `from __future__ import with_statement`, though.
This statement will be always enabled in Python 2.6.

-- 
HTH,
Rob



From angelina_kurkova at yahoo.com  Tue Nov 21 13:25:13 2006
From: angelina_kurkova at yahoo.com (angelina_kurkova at yahoo.com)
Date: 21 Nov 2006 10:25:13 -0800
Subject: I AM SO SEXY,COME AND GET ME:))
Message-ID: <1164133513.258527.41790@j44g2000cwa.googlegroups.com>





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TITS.
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From naima.mans at gmail.com  Wed Nov  8 08:25:02 2006
From: naima.mans at gmail.com (naima.mans at gmail.com)
Date: 8 Nov 2006 05:25:02 -0800
Subject: Python cgi Apache os.system()
Message-ID: <1162992302.834406.24550@f16g2000cwb.googlegroups.com>

Hello :)

I have installed Apache on windows...
The server work well, and my python script also

but when I want in my python script to run a System command like
os.system(my_command) the script doesn't do anything!

here the error.log

[Wed Nov 08 14:19:30 2006] [error] [client 127.0.0.1] The system cannot
find the drive specified.\r, referer:
http://127.0.0.1/cgi-bin/extract_source.py

When i run the python script manually it works!

i think it's a user access probleme but i don't know how to resolve it
!

please help .... 
thanks



From cousinstanley at hotmail.com  Fri Nov 24 19:52:21 2006
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Fri, 24 Nov 2006 18:52:21 -0600
Subject: SQLite3__Python2.3-SQLite__Problem
References: <1164325325_8617@sp6iad.superfeed.net>
	<1164395893_13229@sp6iad.superfeed.net>
	<20061124215222.4be05771@localhost.localdomain>
Message-ID: <1164415941_14133@sp6iad.superfeed.net>


> if you look at
> http://packages.debian.org/stable/python/python2.3-sqlite,
> you will see that the python2.3-sqlite package is built against
> SQLite 2. This is why you have a "file is encrypted or is not a
> database" message, since databases created with SQLite 2.x are not
> file-compatible with SQLite 3.x file.
> ....

Jon .... 

  I downloaded the PySQLite2 source package
  and compiled and installed it using distutils .... 

  Everything is now working as expected
  under Debian Sarge .... 

  Thanks a lot for taking the time to help out ....


-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From fd0man at gmail.com  Thu Nov  9 08:46:18 2006
From: fd0man at gmail.com (Michael B. Trausch)
Date: Thu, 09 Nov 2006 08:46:18 -0500
Subject: Lists of lists and tuples, and finding things within them
Message-ID: <1163079978.5053.32.camel@pepper>

I have a program that keeps some of its data in a list of tuples.
Sometimes, I want to be able to find that data out of the list.  Here is
the list in question:

[('password01', 'unk'), ('host', 'dragonstone.org'), ('port', '1234'),
('character01', 'Thessalus')]

For a regular list, I could do something like x.index('host') and find
the index of it, but I don't know how to do this for a tuple where the
data item isn't known in advance.  For example, I want to get the "host"
entry from the list above; but I can only retrieve it if I know what it
contains (e.g., x.index(('host', 'dragonstone.org'))).

Is there a better way to do this than a construct similar the following?

for key, value in x:
    if key == 'host':
        print value

Thanks in advance!

    ? Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
   Jabber IM: fd0man at livejournal.com

Demand Freedom!  Use open and free protocols, standards, and software!
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From fredrik at pythonware.com  Tue Nov 28 07:01:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 13:01:56 +0100
Subject: How to increase the speed of this program?
In-Reply-To: <1164714786.086910.288450@45g2000cws.googlegroups.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>	<ekgt97$31p$00$2@news.t-online.com>	<ekgto0$khn$02$1@news.t-online.com>	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>	<ekh0nm$9sh$00$1@news.t-online.com>	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
Message-ID: <ekh8fj$9l2$1@sea.gmane.org>

John Machin wrote:

> I'm extremely agnostic about the spelling :-) IOW I'd be very glad of
> any way [pure Python; e.g. maintaining my own version of the array
> module doesn't qualify] to simply and rapidly create an array.array
> instance with typecode t and number of elements n with each element
> initialised to value v (default to be the zero appropriate to the
> typecode).

     array(t, [v])*n

</F>



From stefan.behnel-n05pAM at web.de  Fri Nov 17 03:55:59 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Fri, 17 Nov 2006 09:55:59 +0100
Subject: Secure Python
In-Reply-To: <mailman.261.1163688502.32031.python-list@python.org>
References: <1163646179.11586.60.camel@pc7.dolda2000.com>
	<mailman.261.1163688502.32031.python-list@python.org>
Message-ID: <455D791F.10002@web.de>

krishnakant Mane wrote:
> I need to use python for a very mission critical project.  may be I
> will also use zope.
> so I will like to know how far I can trust python for security in its
> absolute (platform independent ) sence?
> I mean running unwanted code at run-time etc.

If you want a secure system, build it without having to run arbitrary code
from untrusted sources.

Stefan


From mail at microcorp.co.za  Tue Nov 14 01:12:24 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Nov 2006 08:12:24 +0200
Subject: Python development time is faster.
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <02d801c707c2$81792ac0$03000080@hendrik>

 "Chris Brat" <chrisBrat at gmail.com> wrote:


> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
>
> Does anyone have any comments on that statement from personal
> experience?
> How is this comparison measured?

I don't think it can be, objectively - comparing two teams,  one using language
"a", and the other python, to do  a task, is simply comparing the skill levels
of the two teams - and using the same team to do the same task in two different
languages is also misleading, because of the experience gained in the first
iteration.

Python is actually astonishing - it seems to "fit the brain" of a large number
of people - it is very easy to get started with, and is rich enough to keep
surprising you - even after considerable time hacking around with it.
It can do OO, but you can also write procedures in it, and you can even mix the
two in the same module, and most of the time it "just works" - and when it
doesn't, it is normally very easy to teach yourself what you are doing wrong by
playing at the interactive interpreter prompt.  This makes for productivity, as
you can write quite complex things in a day or so, from scratch, such as:

A single pass "assembler" for a virtual machine with 33 instructions - from
nothing to running, fully debugged, in two days.

A simple sliding window protocol - coded up from nothing in four days - mostly
spent staring into space, imagining problems, instead of coding... so the
"design" time is included... but its not working yet, as I have to write the
other side in assembler on a very small machine, which would normally have taken
me almost a month, but that will now probably take about two weeks, as I have
the Python code to translate...

And I am not a guru on this group, and I have just idly mucked around with
Python for about a year in real time, not doing it full time, or making any real
effort to study the language formally beyond lurking here - there are other
people here on this group who, I am sure, could beat the hell out of these
times, both for the design and the coding.

So to sum up my personal perspective - it is very worth while to know a little
python, even if you just use it as a prototyping language - it gets you going
rapidly...

- Hendrik




From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 21:40:18 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 05 Nov 2006 13:40:18 +1100
Subject: WebScraping
References: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <pan.2006.11.05.02.40.17.857810@REMOVE.THIS.cybersource.com.au>

On Sun, 05 Nov 2006 08:09:52 +1000, Graham Feeley wrote:

> Can someone steer me to scripts / modules etc on webscraping please???

The definitive documentation on the built-in Python modules can be found
here: http://docs.python.org/modindex.html

The ActiveState Python cookbook should be useful, e.g.
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/391929

Also see Beautiful Soup:
http://www.crummy.com/software/BeautifulSoup/

And of course, GIYF ("Google Is Your Friend") http://www.google.com which
leads me to:

http://sig.levillage.org/?p=588
http://sig.levillage.org/2005/03/11/web-scraping-with-python-part-ii/
http://wiki.tcl.tk/2915 (not focused on Python, but may still be useful).


> Ultimately I would like someone to write a script for me.

Are you offering to hire a developer?


-- 
Steven.



From python.list at tim.thechases.com  Thu Nov  9 22:58:12 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 09 Nov 2006 21:58:12 -0600
Subject: how is python not the same as java?
In-Reply-To: <ej0se4$jt9$1@sea.gmane.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<ej0se4$jt9$1@sea.gmane.org>
Message-ID: <4553F8D4.70907@tim.thechases.com>

> Java is horrible, Oython is not.

Oython...the new scripting language from down under...just a wee 
bit south of the island of Java...

g'day-mate'ly yers...

-tkc







From msherman77 at yahoo.com  Wed Nov  1 08:53:54 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 1 Nov 2006 08:53:54 -0500 (EST)
Subject: report progress from C function
In-Reply-To: <1162336313.895048.202440@k70g2000cwa.googlegroups.com>
Message-ID: <20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>

I downloaded Pyrex and ran it through their own
example. The code looks quite messy, and I even saw a
few "goto"s. 
I think I will stick with my own code for now.
Thanks in any case.

--- John Machin <sjmachin at lexicon.net> wrote:

> Michael S wrote:
> > Good day all.
> >
> > I rewrote part of my program in C, it's a usually
> a
> > long task. I wanted to be able to report the
> progress
> > back to my python program. In  my module (in
> addition
> > to the function that performs the above-mentioned
> > task) there is a function that returns the
> variable,
> > indicating the progress. However I am not sure how
> to
> > call it. Once I call the C function that does the
> work
> > (it's a while loop that takes minutes sometimes) I
> > can't call that progress function.
> > Any ideas?
> >
> 
> What do you expect your "python program" to be doing
> between calls to
> the get_progress function?
> 
> Here's a sketch of one possible way of doing
> something useful: add the
> following 2 args to your C "does the work function":
> (1) Python function object to be called every n
> times around the while
> loop or every nth other event or every n
> milliseconds or whatever
> (2) n
> 
> BTW, why did you rewrite in C rarher than using
> Pyrex?
> 
> Cheers,
> John
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From fredrik at pythonware.com  Fri Nov 17 10:34:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 16:34:32 +0100
Subject: Python list Limit
References: <5a00f6240611170649v275f5e91ka97e997357948513@mail.gmail.com>
Message-ID: <ejkkq9$vhb$1@sea.gmane.org>

Bugra Cakir wrote:

> What is the size limit of list data type in Python ?

there is no limit, beyond the size of a pointer, and the limitations put on your
program by the operating system.

> I've found an MemoryError while extending a list with
>
> samplelist.extend("tail")

when the list is resized, you need to be able to hold an extra copy of the list in
memory simultaneously, in worst case.  the size of a list depends on the number
of items in it, not the size of the actual items, so the peak memory use for a list
of size "size" is a little over 2*size*sizeof(pointer).

are you adding stuff to multiple large lists simultaneously?  have you plotted the
memory growth and compared it to the list size growth?  if memory growth is
more quadratic than linear, you're probably fragmenting the memory.  the only
solution to that problem is to use a better data structure.

</F> 





From stugots at qwest.net  Tue Nov 28 17:23:34 2006
From: stugots at qwest.net (John DeRosa)
Date: Tue, 28 Nov 2006 14:23:34 -0800
Subject: SPE (Stani's Python Editor) web site?
References: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
	<1164748601.099263.98060@l12g2000cwl.googlegroups.com>
Message-ID: <qkdpm2hn6eqddmebkbe28s2euvjpakg3ko@4ax.com>

On 28 Nov 2006 13:16:41 -0800, "Bernard" <bernard.chhun at gmail.com>
wrote:

>
>I can send you the latest tar.gz ( SPE-0.8.3.c-wx2.6.1.0.tar ) file if
>you want it :)

I'm looking for SPE for Python 2.5 and wxPython 2.7.2.0, on Windows.
Do you have that?


From ndbecker2 at gmail.com  Sun Nov 12 06:16:57 2006
From: ndbecker2 at gmail.com (Neal Becker)
Date: Sun, 12 Nov 2006 06:16:57 -0500
Subject: Find interface associated with default route?
Message-ID: <ej6vr6$17a$1@sea.gmane.org>

Any thoughts on howto find the interface associated with the default route
(this is on linux)?



From ronrsr at gmail.com  Fri Nov 17 01:07:16 2006
From: ronrsr at gmail.com (ronrsr)
Date: 16 Nov 2006 22:07:16 -0800
Subject: determining the bounds of a tuple returned from a database
Message-ID: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>

here is my result.
How do I determine the number of tuples in this array, returned from a
mysql database?

How do I determine the number of characters or entry in each tuple?

thanks very much for your assistance,

-rsr-


(('Agricultural subsidies; Foreign aid',), ('Agriculture; Sustainable
Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
Development, Birth Defects; Toxic Chemicals',), ('Antibiotics,
Animals',), ('Agricultural Subsidies, Global Trade',), ('Agricultural
Subsidies',), ('Biodiversity',), ('Citizen Activism',), ('Community
Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture, Cotton',),
('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
Childhood Development, Birth Defects',), ('Corporate Reform,
Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
(Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
('Democracy, Corporate Personhood, Porter Township (Dem. Book)',),
('Disaster Relief',), ('Dwellings, Slums',), ('Economics, Mexico',),
('Economy, Local',), ('Education, Protests',), ('Endangered Habitat,
Rainforest',), ('Endangered Species',), ('Endangered Species,
Extinction',), ('antibiotics, livestock',), ('Pesticides, Water',),
('Environment, Environmentalist',), ('Food, Hunger, Agriculture, Aid,
World, Development',), ('Agriculture, Cotton Trade',), ('Agriculture,
Cotton, Africa',), ('Environment, Energy',), ('Fair Trade (Dem.
Book)',), ('Farmland, Sprawl',), ('Fast Food, Globalization,
Mapping',), ('depression, mental illness, mood disorders',), ('Economic
Democracy, Corporate Personhood',), ('Brazil, citizen activism, hope,
inspiration, labor issues',), ('citizen activism, advice, hope',),
('Pharmaceuticals, Medicine, Drugs',), ('Community Investing',),
('Environment, Consumer Waste Reduction, Consumer Behavior and
Taxes',), ('Hunger, US, Poverty',), ('FERTILITY, Women',),
('Corporatism, Environment',), ('Economic Democracy, Corporate
Farming',), ('Economic Democracy, Inspiration',), ('FEAR
(Fearlessness)',), ('Federal budget, military spending, foreign
cultural exchange programs',), ('Fish Farming',), ('Fish population,
commercial fishing industry',), ('GMO, BT Cotton',), ('Food borne
Illness, Water',), ('Food Charity',), ('Food Charity, Urban Farming',),
('Food Consumption, Luxury',), ('Food Cost, international',), ('Food
Disposal, Waste',), ('Food stamps, eligibility for',), ('Food,
expenditure on',), ('Foreign Aid',), ('Genetics, Food, Agriculture,
International',), ('Global Policy, Bush Administration',), ('Global
Trade, food',), ('Global Trade, free trade, clothing',),
('Globalization',), ('GMO, SACTO Protests',), ('GMO, Wheat, trade',),
('Happiness and income',), ('Health Care - Spending',), ('Hope',),
('Hope, inspirational quote',), ('Human Cloning',), ('Hunger',),
('Hunger, income',), ('IMF, Argentina',), ('IMF, failings',),
('Inequality',), ('INEQUALITY, GLOBALIZATION, POVERTY',), ('Inequality,
Globalization, Latin America',), ('Inspiration',), ('Junk Food',),
('Junk Food, Soft Drinks',), ('Junk Food ,Children, Education,
Media',), ('Junk Food, Education, Children, Nutrition',), ('Junk Food,
Global, Coke',), ('Junk Food, McDonald\x92s',), ('Junk Food,
McDonald\x92s, Global',), ('Junk Food, Soft Drinks, Water',), ('Junk
Food, Education, Nutrition, Childhood Illness',), ('Junk food,
Nutrition, Schools',), ('Labor',), ('Labor Issues, Agriculture,
Sustainable Agriculture Support',), ('Labor Issues, Employee
Ownership',), ('Land Reform, Brazil, Infant mortality',),
('Livestock',), ('Meat',), ('Meat, Brazil, Soybeans, Deforestation',),
('Meat, concentration',), ('Meat, Recalls, Contamination',), ('Meat,
Recalls',), ('Media',), ('Microloans',), ('Military Spending',),
('Nutrition Programs, School Meals, Snapple',), ('Nutrition,
Finland',), ('Obesity',), ('Obesity, Childhood',), ('Obesity,
Africa',), ('Organic Food',), ('Obesity, Global',), ('Obesity, related
illnesses',), ('Obesity, related illnesses, children',), ('Oil',),
('Organic Agriculture',), ('Organic Agriculture, Growth',), ('Organic
Agriculture, Nutrition',), ('Organic Agriculture, Productivity',),
('Organic food prices',), ('Community',), ('Corporate Concentration',),
('Community Gardens, Urban Gardens',), ('Pollution, Air, CO2
emissions',), ('Population, Water',), ('Poverty, Aid',), ('Poverty,
World Bank, Hunger',), ('Organic Produce',), ('Organic Produce,
Farmer\x92s Markets, CSA Community Initiatives (Dem. Book)',),
('Pakistan, Education, Poverty, Terrorism',), ('Pesticides',),
('Pollution, US',), ('Population, Women',), ('Poverty, Labor Issues',),
('t2',), ('Agriculture, Subsidies, Farming, Ranching, Government,
Livestock, Cattle',), ('School, Farmers\x92 Fresh Produce Food',),
('School, Fast Food, Lunch Programs',), ('School, Fast Food, Lunch
Programs, Harms',), ('Citizens Groups',), ('Public Health, Bacteria',),
('Violence, Impotence',), ('Private Food Aid, Food Stamps',), ('Prison
Rates, Race',), ('Produce, Nutritional content of produce, Historical
Perspective',), ('Public Opinion',), ('Slavery',), ('Solar, Renewable
Energy',), ('Suicide',), ('Sustainable agriculture, Moringa tree',),
('Sweatshop Labor',), ('Tax Cuts, George W. Bush',), ('Economic
Democracy (Dem. Book)',), ('Tobacco',), ('Toxic Chemicals',),
('Trade',), ('Trade, Agricultural Raw materials',), ('Trade, Coffee',),
('Trade, Cotton',), ('Trade, NAFTA, Mexico',), ('Vegetarianism',),
('Veterans\x92 Benefits',), ('Violence',), ('Violence, Media,
Children',), ('Water',), ('Water, Privatization',), ('Welfare
Reform',), ('Wind, Renewable Energy',), ('Words',), ('World
Population',), ('World Bank',), ('Grassroots, Community, Living Wage,
Poverty',), ('Subsidies',), ('Protest, Action',), ('Nuclear Power
Plants, Emissions',), ('Media, Fear, Religion, George W. Bush',),
('Consciousness, Change',), ('Peace, Security, Oil',), ('Globalization,
Inequality, Commodity prices',), ('Water, Corporate',), ('Consumerism,
Developing Nations',), ('Nuclear Power, Wind Power',),
('Sustainability, Hope',), ('Ozone, CFCs, Chlorine, Atmosphere',),
('Hydrogen, Emissions, Ozone',), ('Water, Pesticides',), ('Iraq,
Military, Health',), ('Toxic Waste Reduction, Toxic Waste Disposal,
Environmental Regulation, Recycling Electronics',), ('Shareholder
Advocacy, Social Responsibility, Community Investing (Dem. Book)',),
('Fair Trade',), ('Genetically Modified Food, Africa, USAID, ISAAA',),
('Sustainability, Progress',), ('Sustainability, Human Rights,
Globalization, Corporatization',), ('Agricultural Subsidies,
Agricultural Policy',), ('Agricultural Subsidies, Farmers',), ('Cotton,
Rice',), ('Agricultural Subsidies, Farmers, Livestock',),
('Agricultural Subsidies, Prices',), ('Food scarcity, Hunger, Urban
Agriculture',), ('GMO farming, Toxic chemicals',), ('Hunger,
Children',), ('Hunger, Food Insecurity',), ('Inspiration, Corporatism,
War',), ('Inspiration, Economic Growth',), ('Land Vacancies, US Land
Reform',), ('Local agriculture, Local produce, Nutritional content of
local produce',), ('Local produce, Urban agriculture',), ('Pakistan,
Religion, Education',), ('Pharmaceuticals',), ('Privatization',),
('Public panic, Altruism',), ('QA rewrite: citizen activism,
corporatism-environment, hope, inspiration',), ('Wal-Mart, Food
Stamps',), ('Socially Responsible Investment, Banking and Environmental
Initiatives',), ('Terrorism, Suicide Attacks',), ('Agriculture,
Corporate v. Family Farming',), ('Depression, Health',), ('Depression,
Health, Employment, Work, Employee',), ('Self-Interest, Vote,
Altruism',), ('Animal Feed',), ('Corporate Reform (Dem. Book)',),
('Economic Growth',), ('Corporate History, Globalization',),
('Agriculture',), ('Environment, Public Opinion (Dem. Book)',),
('Illiteracy, poverty',), ('Military, Arms Sales',), ('Agriculture;
Agricultural imports; Global trade',), ('Africa; Foreign aid; Third
World debt; Loan forgiveness; Jubilee',), ('Foreign aid; Military aid;
Development aid; Humanitarian aid',), ('Foreign aid; Development
assistance',), ('Agricultural Subsidies; Foreign aid; Cotton subsidies;
Africa',))
>>>



From acatejr at gmail.com  Fri Nov  3 18:48:23 2006
From: acatejr at gmail.com (acatejr at gmail.com)
Date: 3 Nov 2006 15:48:23 -0800
Subject: Python Classes and dynamic class members
In-Reply-To: <xkQ2h.21568$TV3.20249@newssvr21.news.prodigy.com>
References: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>
	<xkQ2h.21568$TV3.20249@newssvr21.news.prodigy.com>
Message-ID: <1162597703.632080.75970@i42g2000cwa.googlegroups.com>

James Stroud wrote:
> acatejr at gmail.com wrote:
> > I have a text file that I am parsing.  Each line is of the form:
> >
> > max_time  0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
> >
> > The first item is the field name and the next twelve items are values
> > for each month in the year.  There are multiple lines each for some
> > different variable.  I am able to parse this data easily enough, but
> > what I'd like to do is have a class that stores all this infomormation
> > using dynamic member attributes/fields and the resulting list of
> > values.  For example, if the class WeatherData was instantiated and I
> > parsed the line above as so:
> >
> > field_name = "max_time;
> > values = [0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
> >
> > how could I get weather data to store values in an attribute called
> > "max_time"?  Ultimately, something like this would be possible:
> >
> >
> >>>>WeatherData.max_time
> >>>>[0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
> >
> >
> > Any help would be appreciated.
> >
> setattr(Weatherdata, "max_time", max_time)
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/

Thanks a lot!!

I did find that creating and calling the following method works too:

def setAt(self, field, data):
    expression = "self." + field + " = data"
    exec(expression)

I just don't know which one would be more efficient, but I like setattr
better.



From hollowspook at gmail.com  Sat Nov 25 21:30:15 2006
From: hollowspook at gmail.com (hollowspook)
Date: 25 Nov 2006 18:30:15 -0800
Subject: problem with global variable in a module
In-Reply-To: <4sr5bvF110fjlU1@mid.uni-berlin.de>
References: <1164463795.849460.124060@j72g2000cwa.googlegroups.com>
	<4sr5bvF110fjlU1@mid.uni-berlin.de>
Message-ID: <1164508215.452358.13030@l39g2000cwd.googlegroups.com>

Thanks for all the replys.


"Diez B. Roggisch ???
"
> hollowspook schrieb:
> > def aa():
> >     global b
> >     b=b+1
> >     print b
> >
> > b=1
> > aa()
> >
> > The above code runs well in python shell.
> >
> > However I  have a problem as follows.
> >
> > new a file named test.py
> > ------------------------------------------------------------------------
> >
> > def aa():
> >     global b
> >     b=b+1
> >     print b
> > -------------------------------------------------------------------------
> >
> > Then in python shell,
> >
> > from test import *
> > b=1
> > aa()
> >
> > The error message is :
> > Traceback (most recent call last):
> >   File "<interactive input>", line 1, in ?
> >   File "test.py", line 3, in aa
> >     b=b+1
> > NameError: global name 'b' is not defined
> >
> > Why this happens? Please do me a favor.
>
> Because python does not know "real" globals - globals are always only
> global on a module level. Now using the "from module import *"-syntax
> asks for trouble. Because your global b above is global to the
> __main__-module, not to the module test. But the aa-function expects it
> to live in tests.
>
> To make your example work, do it as this:
>
> import test
>
> test.b = 1
> test.aa()
>
>
> See
> http://effbot.org/pyfaq/tutor-whats-the-difference-between-import-foo-and-from-foo-import.htm
> 
> Diez



From tgrav at mac.com  Sat Nov 18 11:12:06 2006
From: tgrav at mac.com (Tommy Grav)
Date: Sat, 18 Nov 2006 11:12:06 -0500
Subject: pyfits problem
In-Reply-To: <0001HW.C18403F2008395CBF0305530@news.verizon.net>
References: <mailman.286.1163708914.32031.python-list@python.org>
	<0001HW.C18403F2008395CBF0305530@news.verizon.net>
Message-ID: <F8130767-21C1-4A71-A02F-904855BA3A29@mac.com>


On Nov 18, 2006, at 12:27 AM, Cygnus X-1 wrote:

> Have you opened the file?  Which version of pyFITS?
>
> Consider:
>    fimg=pyfits.open(datafile)
>    self.header=fimg[0].header
>    self.image=fimg[0].data
>
> Tom

I found that installing the latest version of pyfits solved the problem.
Seems like there was a mismatch between my version of numpy
and pyfits. Anyways it works just fine now :)

Tommy
tgrav at mac.com
http://homepage.mac.com/tgrav/

"Any intelligent fool can make things bigger,
more complex, and more violent. It takes a
touch of genious -- and a lot of courage --
to move in the opposite direction"
                          -- Albert Einstein


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From python.sam at googlemail.com  Thu Nov 16 11:59:30 2006
From: python.sam at googlemail.com (sam)
Date: 16 Nov 2006 08:59:30 -0800
Subject: accessing fortran modules from python
Message-ID: <1163696370.036741.274000@b28g2000cwb.googlegroups.com>

hello all,

i am currently in the process of planning a piece of software to model
polymerisation kinetics, and intend to use python for all the
high-level stuff. the number-crunching is something i would prefer to
do in fortran (which i have never used, but will learn), but i have no
experience of accessing non-python code from python. i am also fairly
new to programming period, and am therefore tackling a fairly serious
issue reletive to my experience.

how easy is it to get fortran modules running from python? if c is
easier to use in this respect, i could go in that direction instead.

i realize there is a lot of material on this subject already available,
but i am finding it difficult to make sense of, it's like trying to
take a drink from a fire hose.

any advice would be gratefully received. i will almost certainly be
coding this on windows, for what it's worth.

thank you,

sam

PS if numpy is adequate for this, i would be quite happy to use it. i
got the impression it was more for matrix algebra. i will be
programming a monte carlo simulation, which will need to perform a lot
(a lot!) of simple operations over and over...



From gagsl-py at yahoo.com.ar  Sat Nov 25 00:59:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 25 Nov 2006 02:59:07 -0300
Subject: Does only emacs and idle support symbolic debugging?
In-Reply-To: <1164304071.554196.245920@l12g2000cwl.googlegroups.com>
References: <mailman.647.1164297263.32031.python-list@python.org>
	<4sluthFvvkteU1@mid.uni-berlin.de>
	<1164304071.554196.245920@l12g2000cwl.googlegroups.com>
Message-ID: <7.0.1.0.0.20061125025826.01f9e1c0@yahoo.com.ar>

At Thursday 23/11/2006 14:47, Bytter wrote:

>PyScripter (windows only) here:
>http://mmm-experts.com/Products.aspx?ProductId=4
>
>On Nov 23, 4:00 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> > Victor Ng wrote:
> > > Subject line pretty much says it all - are those the only two editors
> > > that support running the symbolic debugger from inside the 
> editor?Nope, eric for example does as well. And I presume komodo 
> will do that also.

Also PythonWin (part of win32all package)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From tiedon_jano at hotmail.com  Sun Nov 26 15:21:02 2006
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 26 Nov 2006 22:21:02 +0200
Subject: question about function not executing
In-Reply-To: <mailman.742.1164568130.32031.python-list@python.org>
References: <mailman.742.1164568130.32031.python-list@python.org>
Message-ID: <4569F72E.5000204@hotmail.com>

Ara Kooser wrote:
<snip>

> When I run the python program it works fine until I try to go west
> from my inital start room. I get the room description but no raw_input
> prompt. I just get dumped back to >>> in the python shell. I think I
> am missing something simple. I pasted in the code below. I am using

<snip>

You've got at least 2 places that read
	prompt_meadow1
instead of
	prompt_meadow1()
like they should.

Cheers,
Jussi



From fredrik at pythonware.com  Sun Nov 12 07:50:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 13:50:18 +0100
Subject: Close program built with py2exe
In-Reply-To: <1569.80.46.127.179.1163277487.squirrel@www.tnei.co.uk>
References: <1569.80.46.127.179.1163277487.squirrel@www.tnei.co.uk>
Message-ID: <ej75ad$eq1$1@sea.gmane.org>

Steve Ingram wrote:

> I've got a problem with a program I've written and want to distribute. It
> uses a wxPython dialog and I've built a distribution version with py2exe.
> Problem is when I run the .exe under windows I can only stop the program
> completely using the task manager. When I close the dialog and check the
> task manager, there is still a running process. I think this is probably
> the python interpreter that is still running.
> 
> Can't find any help anywhere, does anyone know how to get the dialog to
> kill the process properly??

have you checked if any exceptions occur during application shutdown?

it could be that the GUI toolkit manages to remove all windows, but that 
something goes wrong at the application level before the GUI gets around 
to shut down the message loop.

</F>



From bytter at gmail.com  Thu Nov 23 12:47:51 2006
From: bytter at gmail.com (Bytter)
Date: 23 Nov 2006 09:47:51 -0800
Subject: Does only emacs and idle support symbolic debugging?
In-Reply-To: <4sluthFvvkteU1@mid.uni-berlin.de>
References: <mailman.647.1164297263.32031.python-list@python.org>
	<4sluthFvvkteU1@mid.uni-berlin.de>
Message-ID: <1164304071.554196.245920@l12g2000cwl.googlegroups.com>

PyScripter (windows only) here:
http://mmm-experts.com/Products.aspx?ProductId=4

On Nov 23, 4:00 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> Victor Ng wrote:
> > Subject line pretty much says it all - are those the only two editors
> > that support running the symbolic debugger from inside the editor?Nope, eric for example does as well. And I presume komodo will do that also.
> 
> Diez



From fredrik at pythonware.com  Wed Nov 29 01:51:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 07:51:00 +0100
Subject: ElementTree xmlns:xsi question
In-Reply-To: <1164758845.711068.194520@h54g2000cwb.googlegroups.com>
References: <1164758845.711068.194520@h54g2000cwb.googlegroups.com>
Message-ID: <ekjakj$rs1$1@sea.gmane.org>

Craig wrote:

> I'm generating an XML script using ElementTree which has the following
> attributes in the root element:
> 
> <CANmessages xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>  xsi:noNamespaceSchemaLocation="code/can.xsd">

those are namespace declarations, and mean that tags prefixed by "xsi" 
really belongs to the http://www.w3.org/2001/XMLSchema-instance name-
space.

> My python script I have written is:
> 
> root = Element("CANmessages",
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance",
> xsi:noNamespaceSchemaLocation="code/can.xsd")

try:

NS_XSI = "{http://www.w3.org/2001/XMLSchema-instance}"

root = Element("CANmessages")
root.set(NS_XSI + "noNamespaceSchemaLocation", "code/can.xsd")

also see:

     http://effbot.org/zone/element.htm#xml-namespaces

</F>



From fredrik at pythonware.com  Sun Nov 12 09:01:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 15:01:13 +0100
Subject: python(abi)
In-Reply-To: <1163336764.407597@athprx04>
References: <1163336764.407597@athprx04>
Message-ID: <ej79fc$pkk$1@sea.gmane.org>

Ioannis Vranos wrote:

> [root at localhost download]# rpm -ivh wxPython-common-gtk2-unicode-2.6.3.3-fc4_py2.4.i386.rpm
> error: Failed dependencies:
>          python(abi) = 2.4 is needed by wxPython-common-gtk2-unicode-2.6.3.3-fc4_py2.4.i386
> 
> I have found in some message logs, that it is a pseudo-requirement, but where can I 
> download this for Python 2.4.4? (The Python version that comes with my distribution is 
> currently 2.3.4).

something like this could work:

http://rpmfind.net//linux/RPM/fedora/updates/4/i386/python-2.4.3-8.FC4.i386.html

</F>



From bborcic at gmail.com  Fri Nov 10 11:34:11 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 10 Nov 2006 17:34:11 +0100
Subject: how is python not the same as java?
In-Reply-To: <mailman.2035.1163170200.11739.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>	<mailman.2014.1163123991.11739.python-list@python.org>	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<mailman.2035.1163170200.11739.python-list@python.org>
Message-ID: <4554aa2d$1_2@news.bluewin.ch>

Jorge Vargas wrote:
> can you open a commandline and start writting java code? 

beanshell, iirc


From sjmachin at lexicon.net  Thu Nov  9 21:02:55 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 18:02:55 -0800
Subject: comparing Unicode and string
In-Reply-To: <slrnej74sp.nc.horpner@FIAD06.norwich.edu>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<slrnej74sp.nc.horpner@FIAD06.norwich.edu>
Message-ID: <1163124175.648350.202540@k70g2000cwa.googlegroups.com>


Neil Cerutti wrote:
> On 2006-10-16, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
> > Hello,
> >
> > here is something that surprises me.
> >
> >   #coding: iso-8859-1
>
> I think that's supposed to be:
>
> # -*- coding: iso-8859-1 -*-
>

Not quite. As PEP 263 says:

"""
More precisely, the first or second line must match the regular
expression "coding[:=]\s*([-\w.]+)". 
"""



From mail at microcorp.co.za  Sun Nov 12 06:15:03 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 12 Nov 2006 13:15:03 +0200
Subject: explicit self revisited
References: <ej5fuv$a4a$1@online.de>
	<ej5i3k$6l3$1@sea.gmane.org><mailman.2110.1163283825.11739.python-list@python.org>
	<Bot5h.5910$ig4.165@newsread2.news.pas.earthlink.net>
Message-ID: <00a401c7064f$73cdd200$03000080@hendrik>

"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote:


> Especially since there is a comefrom <G>


*breaks into song* : "Oh Susannah, now don't you cry for me..."



From carsten at uniqsys.com  Thu Nov  2 16:23:29 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 02 Nov 2006 16:23:29 -0500
Subject: what's the difference between these two methods? (aka, why
	doesn't one of them work?)
In-Reply-To: <1162502076.438629.289560@k70g2000cwa.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>
	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>
	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>
Message-ID: <1162502609.9422.15.camel@dot.uniqsys.com>

On Thu, 2006-11-02 at 13:14 -0800, JohnJSal wrote:
> JohnJSal wrote:
> > JohnJSal wrote:
> > > Peter Otten wrote:
> > >
> > >
> > > > ...the above is not a 1-tuple, but an ordinary string. You forgot the
> > > > trailing comma:
> > > >
> > > > ('notes',)
> > >
> > > Right you are! Now it works! :)
> > >
> > > Thanks!
> >
> > Oh great, now I've moved on to another issue. It seems that the list
> > appending isn't working right. All that gets added to a list is the
> > last value, not everything. Am I doing something wrong with the append
> > method?
> 
> Ah, got it! I was reinitializing the table_values list in the wrong
> place

The fact that you were able to answer your own question only a few
minutes later indicates to me that you should set your "I give up and
ask the list" threshold a tad higher.

-Carsten




From shansen at advpubtech.com  Wed Nov 29 16:37:24 2006
From: shansen at advpubtech.com (Stephen Hansen)
Date: Wed, 29 Nov 2006 13:37:24 -0800
Subject: Good script editor for Python on Mac OS 10.3
In-Reply-To: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
Message-ID: <7a9c25c20611291337q6e217f27sc23971e77a972a8c@mail.gmail.com>

If you're looking for something free, there's always IDLE.
http://www.python.org/download/mac/

However, if you don't mind paying a little bit-- you should really look at
TextMate at http://www.macromates.com/

It's .. the best editor ever :) I'm the envy of all my windows coworkers who
I had previously sold on UltraEdit ;)

TextMate has good python support, and is extremely customizable.. It also
has a very helpful community to get assistance if its needed w/ the usage or
customization.

On 29 Nov 2006 11:59:20 -0800, Scott_Davies <cloudrider9 at gmail.com> wrote:
>
> Hi,
>
> I have an old Mac with OS X Panther installed.  I also have the Python
> language download file, but I haven't got a text/script editor to use
> for it.  Does anyone have a recommendation for a good Python text
> editor in OS 10.3?
>
> Thanks,
>
> Scott D.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Stephen Hansen
Development
Advanced Publishing Technology

shansen at advpubtech.com
(818) 748-9282
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From gagsl-py at yahoo.com.ar  Tue Nov 14 14:15:33 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 14 Nov 2006 16:15:33 -0300
Subject: How to check for instances of a class
In-Reply-To: <1163530852.868370.104780@h54g2000cwb.googlegroups.com>
References: <1163530852.868370.104780@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061114161425.052b59c8@yahoo.com.ar>

At Tuesday 14/11/2006 16:00, erokar at gmail.com wrote:

>Traversing a list of variables, I need to check wheter an element in
>the list is an instance of a (user defined) class. What cind of
>comparison operator can I use? Can't seem to find this in the
>documentation. I anyone have an example it is much appreciated.

isinstance


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From mogmios at gmail.com  Fri Nov 17 13:57:13 2006
From: mogmios at gmail.com (Michael)
Date: Fri, 17 Nov 2006 11:57:13 -0700
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <Xns987CACBEFEFDCcastleamber@130.133.1.4>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
Message-ID: <455E0609.8030903@mlug.missouri.edu>


>> Short answer: People use Python instead of Java because people (at
>> least intelligent people) tend to avoid pain.
>>     
> Intelligent people don't suffer from fanboy sentiments. They just pick a 
> language that works best for them.
I agree with the previous poster and don't think it's just being a fan
boy. Some projects require Java, or at least are easier in Java, such as
creating browser applets, but in the majority of cases I find Python
much easier to work in. The code is more terse and easier to read and
work with.




From ptmcg at austin.rr._bogus_.com  Wed Nov 22 10:46:08 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 22 Nov 2006 15:46:08 GMT
Subject: Pyparsing Question.
References: <1164188646.047093.182390@f16g2000cwb.googlegroups.com>
Message-ID: <4h_8h.1571$_H5.1426@tornado.texas.rr.com>

"Ant" <antroy at gmail.com> wrote in message 
news:1164188646.047093.182390 at f16g2000cwb.googlegroups.com...
>I have a home-grown Wiki that I created as an excercise, with it's own
> wiki markup (actually just a clone of the Trac wiki markup). The wiki
> text parser I wrote works nicely, but makes heavy use of regexes, tags
> and stacks to parse the text. As such it is a bit of a mantainability
> nightmare - adding new wiki constructs can be a bit painful.
>
> So I thought I'd look into the pyparsing module, but can't find a
> simple example of processing random text. For example, I want to parse
> the following:
>
> "Some random text and '''some bold text''' and some more random text"
>
> into:
>
> "Some random text and <strong>some bold text</strong> and some more
> random text"
>
> I have the following as a starting point:
>
> from pyparsing import *
>
> def parse(text):
>    italics = QuotedString(quoteChar="''")
>
>    parser = Optional(italics)
>
>    parsed_text = parser.parseString(text)
>
>
> print parse("Test this is '''bold''' but this is not.")
>
> So if you could provide a bit of a starting point, I'd be grateful!
>
> Cheers,
>
Ant,

Welcome to pyparsing!  The simplest way to implement a markup processor in 
pyparsing is to define the grammar of the markup, attach a parse action to 
each markup type to convert the original markup to the actual results, and 
then use transformString to run through the input and do the conversion. 
This discussion topic has some examples: 
http://pyparsing.wikispaces.com/message/view/home/31853.

-- Paul




From svein at seldal dot com  Tue Nov 14 07:54:33 2006
From: svein at seldal dot com (Svein Seldal)
Date: Tue, 14 Nov 2006 13:54:33 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <eivuh3$tk2$1@news.albasani.net>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
	<7vCdnSqE260grc7YRVnzvQ@telenor.com>
	<eivuh3$tk2$1@news.albasani.net>
Message-ID: <Y7idna2l5tQXIcTYRVnzvA@telenor.com>

Hi!

I think I've found the bug, but I need to confirm this behavior.

My findings is that if you use PyEval_InitThreads(), it is crucial to 
release the GIL with PyEval_ReleaseThread() afterwards.

The API docs states that you can release the GIL with 
PyEval_ReleaseLock() or PyEval_ReleaseThread() AFAICS. 
http://docs.python.org/api/threads.html under docs of void 
PyEval_InitThreads().

However, if I do use PyEval_ReleaseLock() it will crash shortly after 
with "Fatal Python error: ceval: tstate mix-up" in a multithreaded C 
environment.

If I use PyEval_ReleaseThread() to release the GIL, my app seems stable. 
I release the GIL like this:

     PyThreadState *pts = PyGILState_GetThisThreadState();
     PyEval_ReleaseThread(pts);

Now, is this a feature or expected behavior in python (i.e. unclear API 
documentation), or is this a bug in python itself?


Regards,
Svein


PS:

For reference I did something like this in pseudo-code:

     Py_Initialize();
     PyEval_InitThreads();

     other_py_inits();   // Load py modules, etc.

     PyEval_ReleaseLock();    // <-- MAKES THE APP UNSTABLE

     create_c_thread();

     PyGILState_STATE gstate;
     gstate = PyGILState_Ensure();

     call_py_function_main();  // Py main() wont return

     PyGILState_Release(gstate);


And the "main" of the C thread function looks like this:
    while(1)
    {
         PyGILState_STATE gstate;
         gstate = PyGILState_Ensure();

         call_py_function_send();

         PyGILState_Release(gstate);
    }


From santoshrc at gmail.com  Wed Nov  8 00:24:36 2006
From: santoshrc at gmail.com (Santosh Chikkerur)
Date: Wed, 8 Nov 2006 10:54:36 +0530
Subject: use of (a**b) (a*b)
Message-ID: <caa940d20611072124g53bfa933j533a618e9e55bbb6@mail.gmail.com>

Hi Friends,
Let me know the use of ' ** ' operator and ' \\' use.

f=(3*s**2) how is it different, if use only single '*' and also the divide
operator.


Thanks in advance,
Santosh
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From norbert at akumakun.de  Sat Nov  4 07:15:30 2006
From: norbert at akumakun.de (Norbert Kaufmann)
Date: Sat, 04 Nov 2006 13:15:30 +0100
Subject: small python cgi webserver
In-Reply-To: <mailman.1761.1162636919.11739.python-list@python.org>
References: <mailman.1760.1162630079.11739.python-list@python.org>	<1162635479.491109.15640@h54g2000cwb.googlegroups.com>
	<mailman.1761.1162636919.11739.python-list@python.org>
Message-ID: <eii08d$8ki$1@online.de>

Fabian Braennstroem wrote:
[...]
> 
> Maybe, I understood something wrong, but I thought that the
> above 'webserver' script would replace apache in my case; at
> least I hoped!?
> 

It does. The 'ServerRoot' and 'DocumentRoot' directories are the
directories you are starting your webserver in.
Create a 'cgi' directory inside this and consider that you have to name
it in the serverscript in relation to the serverroot!

<quote>
cgi_directories=["/home/fab/Desktop/cgi-bin"]
</quote>

This means you have to start your server inside directory '/'.

If you start your server in your home dir '/home/fab' then you have to
name your cgi_directories ['/Desktop/cgi-bin'].

In your response (cgi-script) you have to divide the header from the
content '\r\n\r\n'.

HTH

Norbert


From bogus@does.not.exist.com  Tue Nov  7 16:16:20 2006
From: bogus@does.not.exist.com (Christian Aastorp)
Date: Tue, 07 Nov 2006 22:16:20 +0100
Subject: sound processing modules in python - anyone?
References: <mailman.4783.1162830903.11738.python-list@python.org>
	<mailman.1820.1162850780.11739.python-list@python.org>
Message-ID: <0jt1l2lv63823tnvck7o569chme5kcpf8q@4ax.com>

On Mon, 6 Nov 2006 23:06:18 +0100 (CET), sittner at lkb.ens.fr wrote:

>Hi everyone,
>I'm looking for a module for sound processing (manipulating sound objets,
>filters, ffts etc.).
>I tried Snack, but when i downloaded the package that was supposed to be
>for python, there was only the Tk/Tcl stuff (where's the .py ?).
>could anyone help me with that (or with any other sound module for python)?
>thanks in advance,
>g

Here is the download page, listing Python (only version 2.3 though).
The source is available from the same page.

Or maybe, from comp.lang.python.announce:
----------------
     An early beta of the csound routine library is out with another
version to follow soon after.  The csound library is a group of
routines to minipulate .csd and .orc .sco  .src (shortened orc format)
combine delete exc.

https://sourceforge.net/project/showfiles.php?group_id=156455 
----------------

I believe that csound is a very mature and complete toolbox for music
generation and sound manipulation. 

-- 
Christian Aastorp


From allenjo5 at mail.northgrum.com  Tue Nov 21 11:25:05 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 21 Nov 2006 08:25:05 -0800
Subject: Question about unreasonable slowness
In-Reply-To: <Tsydnegq7KP-tv_YnZ2dnUVZ_rGdnZ2d@99main.com>
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
	<455ce05a$0$5794$4d3efbfe@news.sover.net>
	<1163773005.201111.175020@f16g2000cwb.googlegroups.com>
	<mailman.347.1163778501.32031.python-list@python.org>
	<1163795956.923263.200590@e3g2000cwe.googlegroups.com>
	<Tsydnegq7KP-tv_YnZ2dnUVZ_rGdnZ2d@99main.com>
Message-ID: <1164126305.682178.207780@j44g2000cwa.googlegroups.com>


James Antill wrote:
> On Fri, 17 Nov 2006 12:39:16 -0800, allenjo5 wrote:
>
> >> allenjo5 at mail.northgrum.com:
> >> > Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
> >> > shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
> >> > python 2.4.3.   So, that's better, but still unreasonably slow.  And to
> >> > answer another's question, I'm using the ksh builtin 'time' command to
> >> > time the overall script.
> >> >
> >> > BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
> >> > This naively translated pure shell version of my python test script
> >> > completes in .1 secs:
> >> >
> >> > i=1
> >> > while ((i<20))
> >> > do ((i+=1))
> >> >    print next
> >> >    print "$shellIn" | /bin/sh -c ':' |
> >> >            while read line
> >> >            do print $line
> >> >            done
> >> > done
> >>
> > Yeah, apparently this is an AIX specific issue - perhaps the python
> > implementation of popen4() needs to do something special for AIX?
>
>  This seems likely a more general issue, rather than just a python issue
> (although the huge speed up from moving to 2.5.x). A
> couple of things I'd try:

With help from c.u.aix, I've discovered the problem.  Python (in
popen2.py) is attempting to close filedescriptors 3 through 32767
before running the /bin/sh.   This is because os.sysconf('SC_OPEN_MAX')
is returning 32767.   So far, it looks like SC_OPEN_MAX is being set
correctly to 4 in posixmodule.c, and indeed, os.sysconf_names seems to
also have SC_OPEN_MAX set to 4:

python -c 'import os;  print os.sysconf_names'

...
'SC_XOPEN_XCU_VERSION': 109, 'SC_OPEN_MAX': 4, 'SC_PRIORITIZED_IO': 91,
...

In fact, none of the values that sysconf_names has set for the various
constants are being returned by os.sysconf().  For example, the 2
others I just listed:

$ ./python -c 'import os; print os.sysconf("SC_XOPEN_XCU_VERSION")'
4

$ ./python -c 'import os; print os.sysconf("SC_PRIORITIZED_IO")'
-1

This makes no sense to me... unless there is some memory alignment or
endian issue going on here?



From Leo.Kislov at gmail.com  Sun Nov 19 06:27:32 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 19 Nov 2006 03:27:32 -0800
Subject: A python IDE for teaching that supports cyrillic i/o
References: <mailman.430.1163877551.32031.python-list@python.org>
Message-ID: <1163935652.536330.240090@b28g2000cwb.googlegroups.com>

Kirill Simonov wrote:
> Hi,
>
> Could anyone suggest me a simple IDE suitable for teaching Python as a
> first programming language to high school students?  It is necessary
> that it has a good support for input/output in Cyrillic.
>
> Unfortunately, most IDEs I tried failed miserably in this respect.  My
> test was simple: I've run the code
>     name = raw_input("What's your name? ")  # written in Russian
>     print "Hello, %s!" % name               # in Russian as well
> both from the shell and as a standalone script. This either caused a
> UnicodeError or just printed invalid characters.
>
> For the record, I've checked IDLE, PythonWin, Eric, DrPython, SPE, and
> WingIDE.  The only ones that worked are WingIDE and IDLE (under Linux,
> but not under Windows).

IDLE on Windows works fine for your example in interactive console:

>>> name = raw_input("What's your name? ")
What's your name? ??????
>>> print name
??????
>>> name
u'\u041b\u0435\u043e\u043d\u0438\u0434'

and as a script:

What's your name? ??????
Hello, ??????!
<type 'unicode'>
>>>

That is IDLE + python 2.4 on Windows. So I'm not sure what is the
problem. In other messages you seems to be talking about system
console. Why? It's not part of IDE.

And another question: are you aware of the fact that recommended way to
handle non-ascii characters is to use unicode type? Most of IDEs should
work fine with unicode. 

  -- Leo



From mail at microcorp.co.za  Fri Nov 17 01:30:29 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 08:30:29 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <035401c70a1f$3df0be80$03000080@hendrik>

"Stephan Kuhagen" <nospam at domain.tld> wrote:


> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. All those limits are managed by the interpreter for script code
> and hence can be limited for untrusted code by the interpreter. This also
> does not really make DoS impossible (what about C extensions? - maybe
> restricting "import"?). - As I said before in this thread, making a sandbox
> really secure is a hard job, and may need some serious changes in the
> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
> to have.

I seem to recall previous discussion on this group about a thing called the
bastion module,
and that it was deprecated.  Not sure if it has any relevance.

- Hendrik



From claird at lairds.us  Mon Nov 13 16:08:19 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Nov 2006 21:08:19 +0000
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
	<mailman.78.1163442868.32031.python-list@python.org>
	<1163447345.986774.289950@h54g2000cwb.googlegroups.com>
Message-ID: <3f3n24-5aa.ln1@lairds.us>

In article <1163447345.986774.289950 at h54g2000cwb.googlegroups.com>,
lennart <l.m.aangeenbrug at gmail.com> wrote:
			.
			.
			.
>At least: i use the dutch portal http://python.startpagina.nl/ to start
>with. Can you advice me a good Python interpreter, or a good startpage
>(as in Python for dummys)?
>
>Lennart
>

Along with the <URL: http://docs.python.org/tut/ > I already sent you,
you can hardly do better than the Dutch-language page you mention above.
You might like <URL:
http://en.wikibooks.org/wiki/Non-Programmer's_Tutorial_for_Python/Contents >;
note that I recommend this as no insult to you, even though you already
are a programmer.  


From hankpai at gmail.com  Wed Nov 29 03:12:34 2006
From: hankpai at gmail.com (hankpai at gmail.com)
Date: 29 Nov 2006 00:12:34 -0800
Subject: [PyQt] windows problem
Message-ID: <1164787954.310842.13220@h54g2000cwb.googlegroups.com>

Dumb question from extreme newbie.

Steps so far:
1. Installed Python 2.5
2. Installed Qt 4.2.1 (with mingw) from executable
3. Installed PyQt 4.1 from executable

Been trying to run the first example (t1.pyw) in the tutorials folder,
but the following error pops up while running the from idle-python gui:

Traceback (most recent call last):
  File "C:/TestEnv/t1.pyw", line 7, in <module>
    from PyQt4 import QtGui
ImportError: DLL load failed: The specified module could not be found.

Thanks for any help!

-henry



From python.list at tim.thechases.com  Thu Nov  9 13:08:40 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 09 Nov 2006 12:08:40 -0600
Subject: Vim/Python Help
In-Reply-To: <37d8e$45536caa$43b07816$714@msgid.meganewsservers.com>
References: <37d8e$45536caa$43b07816$714@msgid.meganewsservers.com>
Message-ID: <45536EA8.3020201@tim.thechases.com>

> I am just getting into python and am trying to learn how to use the 
> python.vim script.  I really like the fact that it autoindents for me while 
> inserting defs etc, but how do I move my cursor to back to outer block (say 
> at the end of a def) to continue with writing next def while still in insert 
> mode?  Right now I have to get out of insert mode to do this....very 
> annoying! 

If I understand what you're wanting, it sounds like you want an 
exdent sort of command.

Vim provides two variants within insert mode:

1) just plain control+D will exdent one 'shiftwidth'

2) typing a zero followed by a control+D will exdent you to the 
far left margin

You can read more in the help at

	:help i_CTRL-D
	:help i_0_CTRL-D
	:help i_^_CTRL-D

(that last variant is more helpful for C/C++ coding than for 
Python, but it's nice to know it's there)

For future reference regarding vim related questions, I highly 
recommend the vim mailing list, which you can find at www.vim.org 
which is almost pure content (very high S/N ratio) and gives the 
python ML a run for its money in terms of fast & accurate responses.

-tkc







From tuomas.vesterinen at pp.inet.fi  Mon Nov  6 07:37:17 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Mon, 06 Nov 2006 12:37:17 GMT
Subject: forwarding *arg parameter
In-Reply-To: <lbx3h.2867$L6.2017@newsread3.news.pas.earthlink.net>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi>
	<U6s3h.3309$ig4.2795@newsread2.news.pas.earthlink.net>
	<oVt3h.336$7b6.109@read3.inet.fi>
	<lbx3h.2867$L6.2017@newsread3.news.pas.earthlink.net>
Message-ID: <10G3h.99$8a7.86@read3.inet.fi>

Dennis Lee Bieber wrote:
> On Sun, 05 Nov 2006 22:51:00 GMT, Tuomas <tuomas.vesterinen at pp.inet.fi>
> declaimed the following in comp.lang.python:
> 
> 
>>> 
>>
>>I fylly agree with tis: "Typically, the responsibility should be on the 
>>CALLER, not the CALLED..". I just don't know how to unpack *arg for 
>>calling g. I can get the len(arg), but how to formulate an unpacked call 
>>g(arg[0], arg[1], ..). Building a string for eval("g(arg[0], arg[1], 
>>..)") seems glumsy to me.
>>
> 
> 	Did you miss the example I gave? Using "*args" on the "def"
> essentially says "pack remaining arguments into one tuple". Using
> "*args" on a CALL says "UNPACK tuple into positional arguments"
> 
> def f(*args):	<<<< pack arguments into tuple

Thats it:

> 	x = g(*args)	>>>> unpack args tuple when calling

Yesterday I tested something like this and got a syntax error. So I got 
misunderstanding that "g(*args)" is'nt a proper syntax. Obviously my 
test sentence had some other syntax error. Sorry.

TV


From noone at nowhere.com  Fri Nov 17 17:41:10 2006
From: noone at nowhere.com (Josh)
Date: Fri, 17 Nov 2006 17:41:10 -0500
Subject: notify on directory changes
Message-ID: <455e3a83$0$560$b45e6eb0@senator-bedfellow.mit.edu>

Hi,
Does python have a way of registering a callback - or through some other 
mechanism - to notify me when a directory listing has changed, or if a file 
has been modified, deleted, created, etc.? I'm looking for behavior similar 
to the .net class FileSystemWatcher. I would also be interested to know if 
there exists a portable c or c++ solution, too.
thanks!
Josh




From cbarbez at gmail.com  Fri Nov 10 06:15:45 2006
From: cbarbez at gmail.com (DarkPearl)
Date: 10 Nov 2006 03:15:45 -0800
Subject: service windows avec py2exe
Message-ID: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>

Bonjour ? tous,

apres avoir cr?er un service windows avec py2exe,
j'ai ce probleme quand je lance le service :

voici ce que je trouve dans le journal d'evenement :

The instance's SvcRun() method failed
<Error getting traceback - traceback.print_tb() failed
<class 'pywintypes.com_error'>: (-2147221020, 'Syntaxe incorrecte',
None, None)



je n'arrive pas du tout ? trouver le probleme.

Peut etre que quelqu'un d'entre vous sais...

Merci



From trentm at activestate.com  Tue Nov 28 12:51:13 2006
From: trentm at activestate.com (Trent Mick)
Date: Tue, 28 Nov 2006 09:51:13 -0800
Subject: pyxpcom
In-Reply-To: <QhHah.226$YX1.85@newsfe23.lga>
References: <QhHah.226$YX1.85@newsfe23.lga>
Message-ID: <456C7711.4060702@activestate.com>

hg wrote:
> Hi,
> 
> Can one tell me what the status of this project is ?. I did google ...
> but not much out there.

PyXPCOM source is in the main Mozilla CVS tree. It is being maintained by Mark 
Hammond (the original developer of the extension). There isn't a lot of 
activity on it, I think, because:
1. Mark did such a good job of implementing it the first time around that it 
needs very little work :)
2. It is very high learning curve to get into playing with PyXPCOM because 
there are no conveniently packaged builds of PyXPCOM for current (or any) 
versions of Firefox or Mozilla.

Interestingly, Mark is currently working *full* support for Python in the 
Mozilla code base, i.e. being able to use Python anywhere you can currently 
use JavaScript (in <script> tags in XUL and HTML). Look for "nsdom" and 
Python. Note that it is still very much in development phase, is only part of 
the Mozilla trunk (I believe) -- hence only really applies to Firefox versions 
well beyond FF2.

The pyxpcom mailing list is here:
http://listserv.activestate.com/mailman/listinfo/pyxpcom

PyXPCOM is heavily used in Komodo 
(<http://www.activestate.com/Products/Komodo/>, the IDE that I work on at 
ActiveState).

Regarding #2 (from above): Mark started some discussion a while back about the 
  what it would take to provide builds of PyXPCOM. The answer is that it would 
probably be very hard.
http://aspn.activestate.com/ASPN/Mail/Message/pyxpcom/3167613


Cheers,
Trent

-- 
Trent Mick
trentm at activestate.com


From multani at free.fr  Fri Nov 24 15:52:22 2006
From: multani at free.fr (Jonathan Ballet)
Date: Fri, 24 Nov 2006 21:52:22 +0100
Subject: SQLite3__Python2.3-SQLite__Problem
References: <1164325325_8617@sp6iad.superfeed.net>
	<1164395893_13229@sp6iad.superfeed.net>
Message-ID: <20061124215222.4be05771@localhost.localdomain>

Le Fri, 24 Nov 2006 13:18:14 -0600,
Cousin Stanley <cousinstanley at hotmail.com> a ?crit :
> 
>    This problem is occuring under Debian GNU/Linux Sarge 
>    using Python 2.3 ....
> 

Hi,

if you look at
http://packages.debian.org/stable/python/python2.3-sqlite,
you will see that the python2.3-sqlite package is built against
SQLite 2. This is why you have a "file is encrypted or is not a
database" message, since databases created with SQLite 2.x are not
file-compatible with SQLite 3.x file.


So, if you can find a Python binding for SQLite 3, go for it, but,
unless you are building it from scratch (I mean, not from a Debian
package), it might be difficult to find.

Otherwise, use the sqlite command line tool (not sqlite3), which is
built against SQLite 2.x.
If you go for this solution, it's easy to migrate from a 2.x to a 3.x
database, something like :
$ echo ".dump" sqlite database.db.2x | sqlite3 database.db.3x
(you will have to change the Python accordingly, of course ;)

Hope it helps,

 - Jon


From claird at lairds.us  Sat Nov 25 05:53:35 2006
From: claird at lairds.us (Cameron Laird)
Date: Sat, 25 Nov 2006 10:53:35 +0000
Subject: Ruby/Python/REXX as a MUCK scripting language
References: <2006112418112116807-zobeid@techiecom>
	<7fN9h.3177$tM1.1699@newsread1.news.pas.earthlink.net>
Message-ID: <fujl34-ipc.ln1@lairds.us>

In article <7fN9h.3177$tM1.1699 at newsread1.news.pas.earthlink.net>,
Dennis Lee Bieber  <wlfraed at ix.netcom.com> wrote:
>On Fri, 24 Nov 2006 18:11:21 -0600, Tony Belding <zobeid at techie.com>
>declaimed the following in comp.lang.python:
>
>> the security issue that really worries me. . .  I have to be able to 
>> limit what the interpreter can execute.  I can't have my users running 
>
>	That is going to be the killer... Python no-longer ships with a
>"secure sandbox" module, because there were always ways to work around
>it.
			.
			.
			.
Tcl's the one language in this area that has gone the farthest
with its "safe interpreter" <URL: http://wiki.tcl.tk/4204 >,
and Tcl is well-supported under Mac OS.


From bill.pursell at gmail.com  Fri Nov  3 01:32:03 2006
From: bill.pursell at gmail.com (Bill Pursell)
Date: 2 Nov 2006 22:32:03 -0800
Subject: a newbi problem: can't find complete python curses library
In-Reply-To: <mailman.1701.1162530265.11739.python-list@python.org>
References: <mailman.1701.1162530265.11739.python-list@python.org>
Message-ID: <1162535523.415862.236840@m7g2000cwm.googlegroups.com>


krishnakant Mane wrote:

> I will like to use the curses or ncurses library for the menus and the
> input forms with add, save, delete, update and cancel buttens.
> I also need to create drop down menus with a top level menu bar.
> I read a few articles about python wrapping curses but can't find some
> thing very comprehencive.
> my question is,
> does python possess a complete wrapper to ncurses and its related
> libraries like menu, panel and form?
> if yes then where can I find documentation?

Try section 14.11.2 of the library reference.

http://docs.python.org/lib/curses-panel-objects.html

--
Bill Pursell



From nickle at gmail.com  Thu Nov 30 12:16:00 2006
From: nickle at gmail.com (Nick)
Date: 30 Nov 2006 09:16:00 -0800
Subject: Python Worship
Message-ID: <1164906960.585165.64570@j44g2000cwa.googlegroups.com>

http://www.sciencedaily.com/releases/2006/11/061130081347.htm

World's Oldest Ritual Discovered -- Worshipped The Python 70,000 Years
Ago

Nick



From mirandacascade at yahoo.com  Sat Nov  4 10:44:28 2006
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 4 Nov 2006 07:44:28 -0800
Subject: elementtree terminology + tangential questions
Message-ID: <1162655068.276394.287080@m73g2000cwd.googlegroups.com>

Was prompted to ask these questions when reading the following link:

http://effbot.org/zone/element-infoset.htm#mixed-content

provides a clear explanation of what the tail member is in the
elementtree package.

Questions:
1) In the xml world, is the text between an element's end tag and the
next tag referred to as the "tail"?
2) None of the xml documents to which I've had exposure (a very, very
small set) have had text between an element's end tag and the next tag,
hence the following question: are there some 'best practices' advice
available to help one decide when it's a good idea to put text between
an element's end tag and the next tag as opposed to putting text in the
text property of an element?
3) Are these questions appropriate for the comp.lang.python group, or
should they be directed to a different group?

Thank you.



From superflit at gmail.com  Mon Nov 13 11:39:40 2006
From: superflit at gmail.com (flit)
Date: 13 Nov 2006 08:39:40 -0800
Subject: Elliptic Curve Simple Example
Message-ID: <1163435980.109473.313080@h48g2000cwc.googlegroups.com>

Hello,

I am trying the Python Cryptography Toolkit, but I didnt succeed, maybe
I am not used to technical programming docs.

WHat I succeed, using the the AES example to encrypt and decrypt.
How Can I change it to use elliptic curves cryptography?
Anyone has a working example, in python to use elliptic to encrypt and
decrypt?

Any help is good
Thanks in advance



From bignose+hates-spam at benfinney.id.au  Sat Nov 11 06:06:00 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 11 Nov 2006 22:06:00 +1100
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<1163203459.695403.19830@m7g2000cwm.googlegroups.com>
	<ej435p$hpp$1@ctb-nnrp2.saix.net>
Message-ID: <87zmayi6p3.fsf@benfinney.id.au>

Jacques Naude <jln at iafrica.com> writes:

> Eric_Dexter at msn.com wrote:
> > They have pearl, c, basic, cobol also but no python.....
>
> Pearl?

Practical Extraction And Reporting Language.

    <URL:http://en.wikipedia.org/wiki/Perl#Name>

-- 
 \     Lucifer: "Just sign the Contract, sir, and the Piano is yours." |
  `\     Ray: "Sheesh! This is long! Mind if I sign it now and read it |
_o__)                             later?"  -- http://www.achewood.com/ |
Ben Finney



From fabio at NOSPAMchelly.net  Thu Nov 23 05:56:51 2006
From: fabio at NOSPAMchelly.net (Fabio Chelly)
Date: Thu, 23 Nov 2006 11:56:51 +0100
Subject: How do I separate my parameters with spawnv
Message-ID: <mn.bacc7d6b8e71c7ac.21770@NOSPAMchelly.net>

Hi,

I have a command line that works fine when I execute it directly:

c:\\curl.exe -T c:\\upload.txt -u login:pwd ftp://ftp-myurl --ftp-ssl

But when I try to use os.spawnv to excute it from my python code, it 
doesn't work at all. Here is my code:

exe = "c:\\curl.exe"
f = "c:\\upload.txt"
logon = "login:pwd"
url = "ftp://ftp-myurl"
import os
os.spawnv(os.P_WAIT, exe, ["-T", f, "-u", logon, url, "--ftp-ssl"])

Does anyone know How I can execute my command line in python?

Thanks and best regards,
Fabio

-- 
Ceci est une signature automatique de MesNews.
Site : http://www.mesnews.net




From fredrik at pythonware.com  Fri Nov 24 01:44:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 07:44:36 +0100
Subject: beginner question about range with list and list
In-Reply-To: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>
References: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>
Message-ID: <ek64cm$hc$1@sea.gmane.org>

erik gartz wrote:

> I'm new to python and I'm having difficulty understanding the following
> code. Why doesn't the variable a contain  [[{}, {'x': 0}, {}], [{},
> {'x': 1}, {}]] instead. Doesn't {} allocate new memory for the
> dictionary each time?

each time it's *executed*, yes.  [{}]*3 doesn't execute [] or {} three 
times; it executes them both once, and then creates a new list with 
three references to the dictionary.  see:

http://effbot.org/pyfaq/how-do-i-create-a-multidimensional-list.htm

</F>



From claird at lairds.us  Mon Nov 13 12:24:38 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Nov 2006 17:24:38 +0000
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
Message-ID: <mbmm24-48f.ln1@lairds.us>

In article <1163437873.721254.31070 at b28g2000cwb.googlegroups.com>,
lennart <l.m.aangeenbrug at gmail.com> wrote:
>Hi,
>
>I'm planning to learn a language for 'client' software. Until now, i
>'speak' only some web based languages, like php. As a kid i programmed
>in Basic (CP/M, good old days :'-) ) Now i want to start to learn a
>(for me) new computer language.
>
>I like Python. Its free, easy to learn and some favorite programs of my
>are written in Python / can understand Python (like OpenOffice) etc.
>
>But I'm not a full-time programmer. I know, that I've only time &
>possibility to learn one (= 1) language good. So i ask myself is python
>the language I'm looking for?
>
>In the future, i want to write the following applications:
>[*] A database driven program, which can handle my clients, tasks and
>places (= 3 tables, has to work relative with each other). I think,
>this isn't a problem for Python
>[*] As a photographer i like to build a picture management system (also
>db) with raw support. Raw is the raw-data from the sensor of the
>camera. My questions:
>- can python encode raw?
>- can python head for a utility like dcraw?
>- or head for a utility like IrfanView (delphi?) or something like
>that? 
			.
			.
			.
Yes.

Yes, Python is generally capable in all the roles you describe.
Perhaps most exciting, though, is that you can try out the
language yourself, TODAY, over the next few hours, and, in no
more time than that, get a realistic if limited idea how it's
likely to work for you.  With the right introduction <URL:
http://docs.python.org/tut/ > you can be coding usefully in
Python very quickly.


From duncan.booth at invalid.invalid  Mon Nov 20 03:59:29 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Nov 2006 08:59:29 GMT
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
Message-ID: <Xns98815B738B64Cduncanbooth@127.0.0.1>

Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> wrote:

> No, because the builtin sum want's a list. This can also handle any
> kind of iterable, so this would work:
> 
> isum(i**2 for i in xrange(100))
> 
> sum would need firs the whole list to be generated:
> 
> sum([i**2 for i in xrange(100)])

Really?

>>> sum(i**2 for i in xrange(20000000))
2666666466666670000000L

seems to work fine, and judging by the memory usage it pretty obviously 
doesn't create an intermediate list.


From paul at boddie.org.uk  Thu Nov  9 12:16:57 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Nov 2006 09:16:57 -0800
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1985.1163092232.11739.python-list@python.org>
Message-ID: <1163092617.499298.326930@f16g2000cwb.googlegroups.com>

Steve Holden wrote:
> Paul Boddie wrote:
> > http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements
> >
> I suppose it would be even better if that hyperlink actually took you to
>   section 1.4.27 rather than 1.4.14 ...

I'd suggest a browser upgrade: even the old version of Konqueror I'm
using here manages to scroll to the right place. And it isn't a Web
site maintenance problem, either, although I did have my suspicions.

Paul



From schronos at yahoo.com  Wed Nov  8 10:44:55 2006
From: schronos at yahoo.com (__schronos__)
Date: 8 Nov 2006 07:44:55 -0800
Subject: Change directory permission under windows
Message-ID: <1163000695.110991.317420@b28g2000cwb.googlegroups.com>

Hi.

  I would like to add people with full control access to a directory. I
can do it to a file in the following way:

		info=win32security.DACL_SECURITY_INFORMATION
		sd=win32security.GetFileSecurity(DIR, info)
		acl=sd.GetSecurityDescriptorDacl()
		sidUser=win32security.LookupAccountName(None,USER)[0]
		acl.AddAccessAllowedAce(win32file.FILE_ALL_ACCESS, sidUser)
		sd.SetSecurityDescriptorDacl(1, acl, 0)
		win32security.SetFileSecurity(dir, info, sd)

and it work correctly, but if I try to do the same to a directory only
the "special permission" checkbox is checked and this is not useful to
me because I need a "full control" so that files under the directory
can inheritage the directory rigths.

Can anybody help me

Thank's



From copiernik at wp.pl  Fri Nov 10 11:58:14 2006
From: copiernik at wp.pl (consternation)
Date: Fri, 10 Nov 2006 17:58:14 +0100
Subject: newbee I have an object how to check what's his class?
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
	<1163171613.040825.78290@m73g2000cwd.googlegroups.com>
Message-ID: <ej2b34$9nk$1@ultra60.mat.uni.torun.pl>

Thank You for reply but ....
I found solution suggested by You in a tutorial yesterday. For some reason
it doesn't work in my case.

code:
#mem-dictionary in Y class for storing objects
#Y doesn't inherit from X
      for (i,v) in self.mem.items(): 
      print " isinstance(x,X)"
      print  isinstance(v,X)
      print "type(x) is X"
      print type(v) is X
      print v.__class__.__name__
      print v.__class__

result:
isinstance(x,X)
False
type(x) is X
False
<type 'list'>
list

Well I can handle my problem. I will give an extra field in class with it's
name. But I thought that when a language has tools to learn a class of an
object one should use it. 


paul.keating at nibc.com wrote:

> This doesn't answer your whole post because it asked a lot of
> questions. But as to finding out whether something is an instance of a
> class:
> 
> class X(object):
>       # ... defined as in your post
> 
>>>> x = X('Fred')
>>>> x
> class X contains:
>>>> type(x) is X
> True
>>>> isinstance(x,X)
> True
>>>> x.__class__.__name__
> 'X'
> 
> Now for subclasses:
> 
> class Y(X):
>     extrastuffinY = 1
> 
>>>> y = Y('Joe')
>>>> type(y) is X
> False
>>>> isinstance(y,X)
> True
> 
> 
> consternation:
> 
>> I can't find  neither in tutorial nor with google It's all about
>> isinstance,  or  __class__.
>> How to test that an object is an instance of my X class??



From DustanGroups at gmail.com  Tue Nov 14 21:57:59 2006
From: DustanGroups at gmail.com (Dustan)
Date: 14 Nov 2006 18:57:59 -0800
Subject: reduce to be removed?
In-Reply-To: <1163378573.018479.261660@b28g2000cwb.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
	<mailman.0.1163325764.32031.python-list@python.org>
	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>
	<1163378573.018479.261660@b28g2000cwb.googlegroups.com>
Message-ID: <1163559479.415682.138010@k70g2000cwa.googlegroups.com>


George Sakkis wrote:
> Dustan wrote:
>
> > Alright, I can see I'm a bit outvoted here. I tried your suggestions
> > and it worked fine.
> >
> > I'll also try to consider in the future that part of the problem might
> > be lack of information conveyed on my part.
>
> If you insist on one-liners, it can be done without sum(), though it
> probably doesn't buy you much in readability:
>
> from itertools import chain
> [list(chain(*row)) for row in foo]
>
> By the way, if this was not a toy example and you're doing serious work
> with n-dimensional arrays, make yourself a favor and install NumPy;
> it's usually both faster and more elegant for array manipulations than
> pure python.

1. I've already written pretty much all the code, and a complete
rewrite would be rather difficult.

2. While I haven't taken a good look at NumPy, my intuition tells me it
won't work with complex data types, which wouldn't work for me at all.

Am I correct on that second one?



From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 29 23:17:10 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 30 Nov 2006 15:17:10 +1100
Subject: a quickie: range - x
References: <1164858136.495250.180790@14g2000cws.googlegroups.com>
Message-ID: <pan.2006.11.30.04.17.10.9008@REMOVE.THIS.cybersource.com.au>

On Wed, 29 Nov 2006 19:42:16 -0800, rjtucke wrote:

> I want an iterable from 0 to N except for element m (<=M).
> I could write
> x = range(N)
> x.remove(m)
> but I want it in one expression.

Because the world will end if you can't?

What's wrong with the solution you already have? If you need to use it
many times, make it a function. Calling the function is always a one-liner.

Here's another solution:

x = [i for i in range(N) if i != m]

Here's another:

x = range(m-1) + range(m+1, N)

Here's a generator to do it:

def range_except(N, m):
    """Iterator that returns ints from 0 through N-1 except for m."""
    for i in xrange(N):
        if i != m:
            yield i




-- 
Steven.



From francois.rivron at gmail.com  Fri Nov 10 02:27:41 2006
From: francois.rivron at gmail.com (frifri007)
Date: 9 Nov 2006 23:27:41 -0800
Subject: urllib.urlopen: Errno socket error
In-Reply-To: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
References: <1161022115.983554.76140@h48g2000cwc.googlegroups.com>
Message-ID: <1163143661.265159.254700@m7g2000cwm.googlegroups.com>


kgrafals at gmail.com a ?crit :

> Hi,
>
> I'm just trying to read from a webpage with urllib but I'm getting
> IOErrors. This is my code:
>
> import urllib
> sock = urllib.urlopen("http://www.google.com/")
>
> and this is the error:
>
> Traceback (most recent call last):
>   File "<pyshell#5>", line 1, in <module>
>     sock = urllib.urlopen("http://www.google.com/")
>   File "C:\Python25\lib\urllib.py", line 82, in urlopen
>     return opener.open(url)
>   File "C:\Python25\lib\urllib.py", line 190, in open
>     return getattr(self, name)(url)
>   File "C:\Python25\lib\urllib.py", line 325, in open_http
>     h.endheaders()
>   File "C:\Python25\lib\httplib.py", line 856, in endheaders
>     self._send_output()
>   File "C:\Python25\lib\httplib.py", line 728, in _send_output
>     self.send(msg)
>   File "C:\Python25\lib\httplib.py", line 695, in send
>     self.connect()
>   File "C:\Python25\lib\httplib.py", line 679, in connect
>     raise socket.error, msg
> IOError: [Errno socket error] (10060, 'Operation timed out')
>
> I'm behind my company's firewall. Would that cause a problem? If it
> does, How do I get around it?


See the documentation for urllib.urlopen:

"""
In a Windows environment, if no proxy environment variables are set,
proxy settings are obtained from the registry's Internet Settings
section.
"""
Remove Proxy configuration under IE and try again
(don't use Ie anymore ;0)



From cvanarsdall at mvista.com  Wed Nov  8 13:12:25 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 08 Nov 2006 10:12:25 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163001215.177739.238130@k70g2000cwa.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>	<mailman.1861.1162937772.11739.python-list@python.org>	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>	<eistaq$m7u$1@panix3.panix.com>
	<4551FA0F.4000202@hotmail.com>
	<1163001215.177739.238130@k70g2000cwa.googlegroups.com>
Message-ID: <45521E09.8050108@mvista.com>

BartlebyScrivener wrote:
> Chaz Ginger wrote:
>
>   
>>> it is supposed to be about PYTHON. Get it?
>>>       
>
> I agree. And Python is an extremely serious matter calling for decorum
> and propriety.
>   
Lol, is it really now?  And I suppose its your definition of decorum and 
not mine right?  Things like that are always relative.  I think decorum 
would state that you should be an adult and not make a big deal out of 
nothing.  But that's just me, and as I said, its all relative.

(and honestly, if you thought the word fuck was bad, you should really 
be offended by my profanity-free statement above).

-c


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From fredrik at pythonware.com  Sun Nov 19 10:32:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 16:32:14 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <1163941421.235619.150260@f16g2000cwb.googlegroups.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<mailman.408.1163844581.32031.python-list@python.org>
	<1163941421.235619.150260@f16g2000cwb.googlegroups.com>
Message-ID: <ejptdv$blg$1@sea.gmane.org>

Uche Ogbuji wrote:

> The fact that the XML Infoset is hardly used outside W3C XML Schema,
> and that the XPath data model is far more common,

and for the bystanders, it should be noted that the Infoset is pretty 
much the same thing as the XPath data model; it's mostly just that the 
specifications use different names for the same concept.  if you cut 
through the vocabulary, it's all about a tree of elements, plus text and 
attributes and a few more (but usually less interesting) things.  it's a 
bit like arguing that

     class Person(object):
         __slots__ = ["name"]
         def __init__(self, name):
             self.name = name

and

     class Employee:
         def __init__(self, first_name, last_name):
             self.full_name = first_name + " " + last_name

and

     employee_name = "..."

are entirely different things, and not just three more or less con- 
venient ways to store exactly the same information.

</F>



From bytter at gmail.com  Wed Nov 22 17:06:31 2006
From: bytter at gmail.com (Hugo Ferreira)
Date: Wed, 22 Nov 2006 22:06:31 +0000
Subject: PyParsing and Headaches
In-Reply-To: <6v39h.2422$Gk5.2255@tornado.texas.rr.com>
References: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
	<6v39h.2422$Gk5.2255@tornado.texas.rr.com>
Message-ID: <4e8efcf50611221406p2c15c789nba30766b3ca9615a@mail.gmail.com>

Chris,

Thanks for your quick answer. That changes a lot of stuff, and now I'm able
to do my parsing as I intended to.

Paul,

Thanks for your detailed explanation. One of the things I think is missing
from the documentation (or that I couldn't find easy) is the kind of
explanation you give about 'The Way of PyParsing'. For example, It took me a
while to understand that I could easily implement simple recursions using
OneOrMany(Group()). Or maybe things were out there and I didn't searched
enough...

Still, fwiw, congratulations for the library. PyParsing allowed me to do in
just a couple of hours, including learning about it's API (minus this little
inconvenient) what would have taken me a couple of days with, for example,
ANTLR (in fact, I've already put aside ANTLR more than once in the past for
a built-from-scratch parser).

Cheers,

Hugo Ferreira

On 11/22/06, Paul McGuire <ptmcg at austin.rr._bogus_.com> wrote:
>
> "Bytter" <bytter at gmail.com> wrote in message
> news:1164223072.219676.157790 at j44g2000cwa.googlegroups.com...
> > Hi,
> >
> > I'm trying to construct a parser, but I'm stuck with some basic
> > stuff... For example, I want to match the following:
> >
> > letter = "A"..."Z" | "a"..."z"
> > literal = letter+
> > include_bool := "+" | "-"
> > term = [include_bool] literal
> >
> > So I defined this as:
> >
> > literal = Word(alphas)
> > include_bool = Optional(oneOf("+ -"))
> > term = include_bool + literal
> >
> > The problem is that:
> >
> > term.parseString("+a") -> (['+', 'a'], {}) # OK
> > term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
> > recognize any token since I didn't said the SPACE was allowed between
> > include_bool and literal.
> >
>
> As Chris pointed out in his post, the most direct way to fix this is to
> use
> Combine.  Note that Combine does two things: it requires the expressions
> to
> be adjacent, and it combines the results into a single token.  For
> instance,
> when defining the expression for a real number, something like:
>
> realnum = Optional(oneOf("+ -")) + Word(nums) + "." + Word(nums)
>
> Pyparsing would parse "3.14159" into the separate tokens ['', '3', '.',
> '14159'].  For this grammar, pyparsing would also accept "2. 23" as ['',
> '2', '.', '23'], even though there is a space between the decimal point
> and
> "23".  But by wrapping it inside Combine, as in:
>
> realnum = Combine(Optional(oneOf("+ -")) + Word(nums) + "." + Word(nums))
>
> we accomplish two things: pyparsing only matches if all the elements are
> adjacent, with no whitespace or comments; and the matched token is
> returned
> as ['3.14159'].  (Yes, I left off scientific notation, but it is an
> extension of the same issue.)
>
> Pyparsing in general does implicit whitespace skipping; it is part of the
> zen of pyparsing, and distinguishes it from conventional regexps (although
> I
> think there is a new '?' switch for re's that puts '\s*'s between re terms
> for you).  This is to simplify the grammar definition, so that it doesn't
> need to be littered with "optional whitespace or comments could go here"
> expressions; instead, whitespace and comments (or "ignorables" in
> pyparsing
> terminology) are parsed over before every grammar expression.  I
> instituted
> this out of recoil from a previous project, in which a co-developer
> implemented a boolean parser by first tokenizing by whitespace, then
> parsing
> out the tokens.  Unfortunately, this meant that "color=='blue' &&
> size=='medium'" would not parse successfully, instead requiring "color ==
> 'blue' && size == 'medium'".  It doesn't seem like much, but our support
> guys got many calls asking why the boolean clauses weren't matching.  I
> decided that when I wrote a parser, "y=m*x+b" would be just as parseable
> as
> "y = m * x + b".  For that matter, you'd be surprised where whitespace and
> comments sneak in to people's source code: spaces after left parentheses
> and
> comments after semicolons, for example, are easily forgotten when spec'ing
> out the syntax for a C "for" statement; whitespace inside HTML tags is
> another unanticipated surprise.
>
> So looking at your grammar, you say you don't want to have this be a
> successful parse:
>     term.parseString("+ a") -> (['+', 'a'], {})
>
> because, "It shouldn't recognize any token since I didn't said the SPACE
> was
> allowed between include_bool and literal."  In fact, pyparsing allows
> spaces
> by default, that's why the given parse succeeds.  I would turn this
> question
> around, and ask you in terms of your grammar - what SHOULD be allowed
> between include_bool and literal?  If spaces are not a problem, then your
> grammar as-is is sufficient.  If spaces are absolutely verboten, then
> there
> are 2 or 3 different techniques in pyparsing to disable the
> whitespace-skipping behavior, depending on whether you want all whitespace
> skipping disabled, just for literals of a certain type, or just for
> literals
> when following a leading include_bool sign.
>
> Thanks for giving pyparsing a try; if you want further help, you can post
> here, or on the pyparsing wiki - the discussion threads on the Home page
> are
> a pretty good support and message log.
>
> -- Paul
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85
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From Jeremy at omba.demon.co.uk  Sun Nov 26 18:36:10 2006
From: Jeremy at omba.demon.co.uk (Jeremy C B Nicoll)
Date: Sun, 26 Nov 2006 23:36:10 +0000 (GMT)
Subject: Ruby/Python/REXX as a MUCK scripting language
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <4e8c0fd25aJeremy@omba.demon.co.uk>

In article <2006112418112116807-zobeid at techiecom>,
   Tony Belding <zobeid at techie.com> wrote:

> My final option would be to create my own language interpeter...

If you're capable of doing that, I'd have thought you'd be capable of
taking the source code for Regina and modifying it so that either no
commands are passed to an external environment, or that only some are.
Surely that'd be less work than creating something from scratch.

-- 
Jeremy C B Nicoll, Edinburgh, Scotland - my opinions are my own.


From jonas.esp at googlemail.com  Wed Nov 22 11:14:27 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 22 Nov 2006 08:14:27 -0800
Subject: Data not flushed at the moment
In-Reply-To: <1164198147.070141.115060@e3g2000cwe.googlegroups.com>
References: <1164198147.070141.115060@e3g2000cwe.googlegroups.com>
Message-ID: <1164212067.403771.234660@m73g2000cwd.googlegroups.com>

Here it's very well explained:
http://groups.google.com/group/django-developers/browse_thread/thread/7bcb01ec38e7e6cd

syncdb() method:
http://code.djangoproject.com/browser/django/trunk/django/core/management.py#L435

But I'm not sure if is a django problem or from python.


MindClass ha escrito:

> I've to modifying a file, then I use a method imported that access to
> that file and has to read the new data, but they are not read ( as if
> the data were not flushed at the moment even using .close()
> explicitly).
>
> ---------------------------------------
>     ...
>     ...
>     # If it is not installed, it looking for the line and insert it.
>     if not is_application:
>         print "Activating I18n application ..."
>         writefile_line = 0
>         a = fileinput.input(settings, inplace=1)
> #        for line in fileinput.input(settings, inplace=1):
>         for line in a:
>             writefile_line += 1
>             if writefile_line == readfile_line:
>                 print "    '%s'," % application_name
>                 print line[:-1]
>             else:
>                 print line[:-1]
>         a.close()
>
>         update()
>
> def update():
>     # Update the data base.
>     try:
>         from django.core.management import syncdb
>     except ImportError, err:
>         print "Can't import from Django: %s" % err
>         sys.exit(1)
>
>     syncdb()
> ---------------------------------------
>
> Note that it only fails if the update() method is run inner of 'if not
> is_application', and I don't understand because it is happening so. But
> the problem is that I need run it when that condition is performed. Any
> idea?



From gagsl-py at yahoo.com.ar  Tue Nov 21 19:41:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 21:41:07 -0300
Subject: Is time.time() < time.time() always true?
In-Reply-To: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061121213222.041021c8@yahoo.com.ar>

At Tuesday 21/11/2006 20:10, flamesrock wrote:

>The question was, is the statement:
>
>time.time() < time.time()
>
>always true? Seems it should be false, since the statement itself
>occurs at one time instant.. but of course we know that python doesn't
>execute code that way.. So my question is, why doesn't Python work this
>way?

The only thing Python can guarantee, is that the left expression is 
evaluated before the right one (5.13 Evaluation order, Language Reference).

Then, whether the first call yields a result always less (or equal) 
to the second, is out of Python scope (and control).
(They might be equal if both calls get the same quantum of time; they 
might be reversed if some other process sets the time in the past).


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From srikrishnamohan at gmail.com  Fri Nov 17 13:50:02 2006
From: srikrishnamohan at gmail.com (km)
Date: Sat, 18 Nov 2006 00:20:02 +0530
Subject: What python modules are available?
In-Reply-To: <ejkvqh$d4i$2@sea.gmane.org>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
	<mailman.334.1163766357.32031.python-list@python.org>
	<1163767023.599564.260920@m7g2000cwm.googlegroups.com>
	<ejkvqh$d4i$2@sea.gmane.org>
Message-ID: <f4cc03640611171050i791c8496sa6c7712161e7f4c1@mail.gmail.com>

Hi all,

Thats ridiculous! why is that the numpy implementation documentation is put
on sale  and not available freely  to everyone?

regards,
KM

-------------------------------------------------------------------------------------------------------
On 11/18/06, Robert Kern <robert.kern at gmail.com> wrote:
>
> Why Tea wrote:
> > All I need is something to provide me with array features. I can't
> > remember why I chose to use numarray a while ago...
>
> You will probably want numpy these days. numarray is being phased out.
>
>   http://numpy.scipy.org/
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless
> enigma
> that is made terrible by our own mad attempt to interpret it as though it
> had
> an underlying truth."
>   -- Umberto Eco
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From daniel.dittmar at sap.com  Fri Nov  3 10:16:47 2006
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Fri, 03 Nov 2006 16:16:47 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eifhf3$mmh$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
Message-ID: <eifmgv$r37$1@news.sap-ag.de>

robert wrote:
> ---- Question Besides:  do concurrent INC/DEC machine OP-commands 
> execute atomically on Multi-Cores as they do in Single-Core threads?

No on the level that that Python reference counting is implemented. The 
CPUs have often special assembler ops for these operations. I think that 
it's even more complicated as some machines require additional read and 
write barriers around these operations.

>> Take a look at IPython1 and it's parallel computing capabilities [1,
[...]
> I do selected things with interprocess shared memory techniques already. 
> Thats medium efficent.
> Multiple interpreters inside one process seem to be most promising for 
> seemless multi-core programming. 

Both IPython and Jython use multiple CPUs without the GIL, so you don't 
need to add the complication of multiple interpreters.

 > As all Python objects share the same
 > malloc space - thats the key requirement in order to get the main
 > effect. As soon as with have object pickling in between its well away
 > from this very discussion.

There's the complication that CPython has garbage collection in addition 
to reference counting. I'm not sure what happens when the garbage 
collector looks at objects rooted in another interpreter.

Daniel


From lorenlightng at gmail.com  Thu Nov 30 20:01:40 2006
From: lorenlightng at gmail.com (g4rlik)
Date: Thu, 30 Nov 2006 17:01:40 -0800 (PST)
Subject: v2.3, 2.4, and 2.5's GUI is slow for me
In-Reply-To: <7630074.post@talk.nabble.com>
References: <7630074.post@talk.nabble.com>
Message-ID: <7631564.post@talk.nabble.com>


No one can help?  This is seriously bugging me to no end.

g4rlik wrote:
> 
> I've been asking all over the place, namely different forums.  I even
> e-mailed help at python.org about my problem, but they couldn't assist me too
> much.
> 
> My problem is..the GUI for versions 2.3, 2.4, and 2.5 of Python run very
> sluggishly.  When I type in them or move them around my desktop, it's very
> slow.  I have figured out that this is because of the subprocesses
> running.  
> 
> To cope with this problem, I created an idle.txt file, and added this to
> the first line of it:
> 
> c:\python25\python c:\python25\Lib\idlelib\idle.py -n
> 
> After that I saved the extension to .bat and now when I run that file, the
> Python GUI opens without any subprocesses running and I have no problem. 
> However, I'd still really like to know how I could fix this problem even
> more.  I honestly don't understand why the GUI is so sluggish for me.  The
> GUIs for Python version 2.2 and below run fine for me.  My system specs
> are as follows:
> 
> Windows XP Home Edition
> AMD Athlon XP 2800
> nVidia 6800GT
> 1 gig of RAM
> 
> If anyone else could help, that would be great.
> 
> 
> ***EDIT***
> 
> When starting up Python's v2.5 GUI, I noticed this message.
> 
> "Personal firewall software may warn about the connection IDLE
>     makes to its subprocess using this computer's internal loopback
>     interface.  This connection is not visible on any external
>     interface and no data is sent to or received from the Internet."
> 
> Maybe a firewall is interfering somehow?  I'm behind a hardware firewall
> with my Linksys router.
> 

-- 
View this message in context: http://www.nabble.com/v2.3%2C-2.4%2C-and-2.5%27s-GUI-is-slow-for-me-tf2735011.html#a7631564
Sent from the Python - python-list mailing list archive at Nabble.com.



From steve at REMOVEME.cybersource.com.au  Fri Nov 17 03:19:22 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 17 Nov 2006 19:19:22 +1100
Subject: How fuzzy is get_close_matches() in difflib?
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
	<1163746781.666937.63970@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.11.17.08.19.21.505181@REMOVEME.cybersource.com.au>

On Thu, 16 Nov 2006 22:59:41 -0800, John Henry wrote:

> I encountered a case where I am trying to match "HIDESST1" and
> "HIDESCT1" against ["HIDEDST1", "HIDEDCT1", "HIDEDCT2", "HIDEDCT3"]
> 
> Well, they both hit "HIDEDST1" as the first match which is not exactly
> the result I was looking for.  I don't understand why "HIDESCT1" would
> not hit "HIDEDCT1" as a first choice.

All those strings are so similar that I think the exact order of "best
match" will depend on the precise details of the algorithm. I note that
the difflib specifically says:

[quote]
This does not yield minimal edit sequences, but does tend to yield matches
that "look right" to people. 
[end quote]

There are many ways that one can calculate the difference between two
strings, e.g. is the string "acab" an "ab" with "ac" inserted at the
front, or "ab" with "ca" inserted in the middle? The Unix diff utility
may return minimal diffs, but difflib does not make that claim.

You want to see "HIDEDCT1" match closer to "HIDESCT1" than "HIDEDST1":

HIDEDCT1 -- John's "best match" target string
HIDEDST1 -- difflib's "best match" target string
HIDESCT1 -- source string

John's best match matches in seven of eight positions, compared to six
of eight for the difflib best match. Disregarding order, both have seven
matching characters. That's a pretty slim difference between the two:

>>> "".join(difflib.Differ().compare("HIDEDCT1", "HIDESCT1"))
'  H  I  D  E- D+ S  C  T  1'
>>> "".join(difflib.Differ().compare("HIDEDST1", "HIDESCT1"))
'  H  I  D  E- D  S+ C  T  1'

I honestly don't know how to interpret those results :(


>>> s = difflib.SequenceMatcher(None, "HIDEDCT1", "HIDESCT1")
>>> t = difflib.SequenceMatcher(None, "HIDEDST1", "HIDESCT1")
>>>
>>> for block in s.get_matching_blocks():
...     print "a[%d] and b[%d] match for %d elements" % block
...
a[0] and b[0] match for 4 elements
a[5] and b[5] match for 3 elements
a[8] and b[8] match for 0 elements
>>>
>>> for block in t.get_matching_blocks():
...     print "a[%d] and b[%d] match for %d elements" % block
...
a[0] and b[0] match for 4 elements
a[5] and b[4] match for 1 elements
a[6] and b[6] match for 2 elements
a[8] and b[8] match for 0 elements
>>>

I think what you are seeing is an artifact of the precise details of the
pattern matcher. Feel free to subclass the SequenceMatcher or Differ
classes to get the results you expect :-)


-- 
Steven D'Aprano



From insyte at gmail.com  Mon Nov 13 19:33:17 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 13 Nov 2006 16:33:17 -0800
Subject: __cmp__ between dissimilar objects
Message-ID: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>

I have a class that has, as an attribute, an instance of
datetime.datetime().  I would like to be able to compare my class
directly to instances of datetime.datetime in addition to other
instances of my class.  The value used for the comparison in either
case should be the value of the datetime attribute of the class:

from datetime import datetime

class GeneralizedTime(object):
    def __init__(self, time=None):
        if time is None:
            self.datetime = datetime.now()
    def __cmp__(self, x):
        if isinstance(x, GeneralizedTime):
            return cmp(self.datetime, x.datetime)
        if isinstance(x, datetime):
            return cmp(self.datetime, x)


>>> import datetime
>>>
>>> GeneralizedTime() > datetime.now()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: can't compare datetime.datetime to GeneralizedTime

Clearly I'm misunderstanding something, here.  As I understand my code,
I'm directly comparing an instance of datetime (self.datetime) to
another instance of datetime.

What am I failing to grasp?

Thanks!

-Ben



From R.Brodie at rl.ac.uk  Thu Nov 16 10:49:16 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Thu, 16 Nov 2006 15:49:16 -0000
Subject: Yield
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
Message-ID: <eji19t$cak$1@south.jnrs.ja.net>


"Danny Colligan" <dannycolligan at gmail.com> wrote in message 
news:1163691173.737911.130410 at i42g2000cwa.googlegroups.com...
> Now that we're on the subject, what are the advantages of using
> generators over, say, list comprehensions or for loops?  It seems to me
> that virtually all (I won't say everything) the examples I've seen can
> be done just as easily without using generators.

The more trivial the example, the harder it is to see the advantage.
Suppose you wanted to sum the first 10000 primes. A quick Google
fins you Wensheng Wang's recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/366178
Just add print sum(primes(10000)), and you're done.






From billjosephson at hotmail.com  Thu Nov  9 10:31:02 2006
From: billjosephson at hotmail.com (BillJosephson)
Date: 9 Nov 2006 07:31:02 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163077141.110334.136080@i42g2000cwa.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163077141.110334.136080@i42g2000cwa.googlegroups.com>
Message-ID: <1163086262.252635.35400@m73g2000cwd.googlegroups.com>


Ant wrote:
> On Nov 9, 6:52 am, "BillJosephson" <billjoseph... at hotmail.com> wrote:
> ...
> > If anyone knows why i can't connect, in info about it would be
> > a big help.
>
> Sounds like the default mirror is down. Go to Utilities -> Global
> Options -> Plugin Manager and click on "Update mirror list". Choose a
> new mirror and try again. If that still fails, it may be that you need
> to set up your proxy server properly.



Woo hoo!  It worked!  Now of course it was a dumb question to begin
with.

May I ask another quetion?  I don't want to mess with lots of plugins
at this point. What are the minimum plugins to get a typical looking
IDE with a code window and output window and that lets me set
breakpoints and step through code?

Thanks a lot Ant, I appreciate your help.



From cameron.walsh at gmail.com  Wed Nov  8 21:30:15 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Thu, 09 Nov 2006 10:30:15 +0800
Subject: Python cgi Apache os.system()
In-Reply-To: <1162992302.834406.24550@f16g2000cwb.googlegroups.com>
References: <1162992302.834406.24550@f16g2000cwb.googlegroups.com>
Message-ID: <eiu3qa$hte$1@enyo.uwa.edu.au>

naima.mans at gmail.com wrote:
> Hello :)
> 
> I have installed Apache on windows...
> The server work well, and my python script also
> 
> but when I want in my python script to run a System command like
> os.system(my_command) the script doesn't do anything!
> 
> here the error.log
> 
> [Wed Nov 08 14:19:30 2006] [error] [client 127.0.0.1] The system cannot
> find the drive specified.\r, referer:
> http://127.0.0.1/cgi-bin/extract_source.py
> 
> When i run the python script manually it works!
> 
> i think it's a user access probleme but i don't know how to resolve it
> !
> 
> please help .... 
> thanks
> 

Without knowing what "my_command" is, all I can suggest is that
"my_command" might be referring to a file that is in your user path, but
not in the path of the user used to run apache or python (which could be
"nobody").

Depending on how securely your server is configured, you may be able to
access whichever file it is looking for if you specify the full path to
the file, or the relative path from the server root directory (watch out
for hardlinks/softlinks.)

Cameron.


From it.job.opportunities at gmail.com  Tue Nov  7 18:30:10 2006
From: it.job.opportunities at gmail.com (IT Recruiter)
Date: 7 Nov 2006 15:30:10 -0800
Subject: Urgent Requirement for a short-term project for SQL Server Developer
	with Good experience in Python - Stamford,
	CT - Duration - 2 to 3 weeks
Message-ID: <1162942210.638203.98190@i42g2000cwa.googlegroups.com>

Hi All,

Our Client is looking for a SQL Server Developer with hands-on
experience in Python at Stamford, CT. It's a very short term project
for 2-3 weeks. Please let me know if you are interested or you know of
someone suitable. The Client would prefer to have an in-person meeting
too. So, ideally anyone who can attend the Face-to-Face would be
preferred.

Please responsd to nslakshmi at eprocorp.com ONLY...

Looking forward for your reply...

Thanks & Regards,

Lakshmi
nslakshmi at eprocorp.com



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov  9 04:37:53 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 09 Nov 2006 20:37:53 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
	<mailman.1948.1163035654.11739.python-list@python.org>
Message-ID: <pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>

On Thu, 09 Nov 2006 12:27:12 +1100, Ben Finney wrote:

> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> 
>> Ben Finney wrote:
>> > If you pass a *mapping* of the
>> > "I-might-want-to-add-more-in-the-future" values, then you get both
>> > explicit *and* expandable, without an arbitrary unneeded sequence.
>>
>> Do you mean by using the **kwargs parameter?
> 
> No. 

Well, that'll teach me to put words in your mouth.

[snip]
> If you have a group of named, semantically-related, unsequenced values,
> pass them into the function as a mapping object (a dict object).

Still, if you are doing this:

mapping_object = {"strength": roll_dice(10),
    "intelligence":roll_dice(10),
    "dexterity":roll_dice(10)}
my_character = Character(mapping_object)

then there is little benefit to building the dict just for the purposes of
passing it to Character(), never to use it again, not when you can do this:

my_character = Character(strength: roll_dice(10), 
    intelligence:roll_dice(10), dexterity:roll_dice(10))

If you happen to already have collected your character attributes in a
mapping object for some other reason, then well and good, pass it into the
function. Otherwise, well, I believe the correct container for
character attributes is a Character, not a dict.

-- 
Steven.



From prouleau001 at gmail.com  Thu Nov 16 11:25:58 2006
From: prouleau001 at gmail.com (Pierre Rouleau)
Date: Thu, 16 Nov 2006 11:25:58 -0500
Subject: atexit.register does not return the registered function. IMHO,
	it should.
In-Reply-To: <60bb7ceb0611160809j42cde231u2c55b41f784e589e@mail.gmail.com>
References: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
	<60bb7ceb0611160809j42cde231u2c55b41f784e589e@mail.gmail.com>
Message-ID: <5c1d522d0611160825l3adfe9d5vc398f7914593f85e@mail.gmail.com>

On 11/16/06, Skip Montanaro <skip.montanaro at gmail.com> wrote:
> > Since that the decorator syntax is upon us, I think it would be good if
> > atexit.register() was returning the function passed as argument.  This
> > simple change to the library would solve a problem with the use of
> > atexit.register as a decorator (and I can't think of any use case where
> > this change would break any code).
> ...
>
> Can you submit a bug report to the SourceForge bug tracker?  I'll take
> care of the problem when I have access to the subversion repository.
>
Done: http://sourceforge.net/tracker/index.php?func=detail&aid=1597824&group_id=5470&atid=105470

I select Python 2.5 as the category.  It affects all versions but most
likely to cause a problem in Python 2.4 and after.

--

Pierre R.


From pDOTpagel at gsf.de  Tue Nov 14 09:21:27 2006
From: pDOTpagel at gsf.de (Philipp Pagel)
Date: Tue, 14 Nov 2006 14:21:27 +0000 (UTC)
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejcjd7$p4r$1@news.lrz-muenchen.de>

erikcw <erikwickstrom at gmail.com> wrote:
> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.

I am not sure, what you mean by 'ordered' in this context. As
pointed out by Jeremy, you need to find an appropriate statistical test.
The appropriateness depend on how your data is (presumably) distributed
and what exactly you are trying to test. E.g. do te data pints come from
differetn groupos of some kind? Or are you just looking for extreme
values (outliers maybe?)?

So it's more of statistical question than a python one.

cu
	Philipp

-- 
Dr. Philipp Pagel                          Tel. +49-8161-71 2131
Dept. of Genome Oriented Bioinformatics    Fax. +49-8161-71 2186
Technical University of Munich
http://mips.gsf.de/staff/pagel


From b.duncan at streatsahead.com  Wed Nov 29 20:32:33 2006
From: b.duncan at streatsahead.com (Brendon)
Date: 29 Nov 2006 17:32:33 -0800
Subject: PyLint syntax question
Message-ID: <1164850353.550655.41010@80g2000cwy.googlegroups.com>

Hi,

This may seem like a stupid question, but I'd like to know anyway.  How
do I used pylint's --ignore option to prevent it from looking at some
files?  The documentation says you have to use a base name.  What the
heck is a base name?

Are there any other ways to stop it looking at certain files?  At the
moment I'm trying to get it to avoid the ones that contain 'import wx'.


Thanks,
Brendon



From deets at nospam.web.de  Mon Nov 27 14:56:17 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Nov 2006 20:56:17 +0100
Subject: Passing com object from simple xmlrpc server to client
In-Reply-To: <1164654803.832525.251850@n67g2000cwd.googlegroups.com>
References: <1164654803.832525.251850@n67g2000cwd.googlegroups.com>
Message-ID: <4t0u71F11pceuU1@mid.uni-berlin.de>

tsjuan schrieb:
> Hello python users,
> 
> I am just learning on how to use xmlrpc and stumbled upon how to pass
> com object
> from server to client side.
> 
> The client side complain about can't marshall the com object. I don't
> know what type
> of marshall command I should use to pass the object.

you can't do that. COM is a interprocess-communication facility that 
doesn't have a value - which is what marshalling tries to accomplish: 
create a wire-representation of a value.

If you are using COM anyway, why don't you use DCOM instead of XMLRPC - 
then things could work.

Diez


From podi.ex at gmail.com  Thu Nov  9 19:42:19 2006
From: podi.ex at gmail.com (Podi)
Date: 9 Nov 2006 16:42:19 -0800
Subject: Excel file read/write?
Message-ID: <1163119339.334965.264850@i42g2000cwa.googlegroups.com>

As far as I know, there is pyXLWriter for writing and xlrd for reading.
Is there such thing so that one can open an Excel file into memory and
read/update any sheet/cell on the fly. One analogy to this is the
ConfigParser module.

Any info would be much appreciated.



From python.list at tim.thechases.com  Thu Nov  9 15:44:21 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 09 Nov 2006 14:44:21 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <slrnel74ak.18g.horpner@FIAD06.norwich.edu>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
Message-ID: <45539325.3090304@tim.thechases.com>

>>> Anyway, the FAQ answer seems to be a weak argument to me.
>> I agree. I was expecting something more technical to justify
>> the colon, not just that it looks better.
> 
> I think it is outstanding that the colon's justification is
> asthetic rather than technical (though I too had expected to see
> a technical excuse for it).

Though by such justifications based on asthetics, the interpreter 
should also enforce that class-names begin with capital letters, 
that camel-case is eschewed in favor of underscore_separation. 
And perhaps enforce a 79-column character limit on text.  Perhaps 
also put a cap on the number of punctuation characters on a given 
line as well to prevent the code from looking too much like 
Perl... ;*)

A few arbitrary warts per-dictum of BDFL are fine though...it 
still looks much cleaner compared to PHP & Perl ;-)

Shaving-with-Occam's-disposable-razor'ly yers...

-tkc






From alain.marcel at svd-info.fr  Mon Nov 13 02:50:40 2006
From: alain.marcel at svd-info.fr (alain.marcel at svd-info.fr)
Date: 12 Nov 2006 23:50:40 -0800
Subject: logging
Message-ID: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>

Hi all !
How to remove a logger ?
There si no logging.removeLogger(name) method.
I've a lot of objects that create loging.
When objects are destroyed, associated logger are not. This create
memory leak...

Thanks for any idea.



From skip at pobox.com  Wed Nov  1 22:38:58 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 1 Nov 2006 21:38:58 -0600
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <1162434526.601605.315560@k70g2000cwa.googlegroups.com>
References: <eib0la$86i$1@newslocal.mitre.org>
	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>
	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
	<1162434526.601605.315560@k70g2000cwa.googlegroups.com>
Message-ID: <17737.26706.452653.458388@montanaro.dyndns.org>


    >> ...alternatively you can just use 'unix slashes', e.g.
    >> 'c:/temp/book1.csv', since those work just fine 'cause the Windows
    >> APIs deal with them properly.

    John> Not all APIs do the right thing. If you fire up the cmd.exe shell
    John> and feed it slashes as path separators, it barfs. Example:
    John>     C:\junk>dir c:/junk/*.bar
    John>     Invalid switch - "junk".
    John> Hence the advice to use rawstrings with backslashes -- they work
    John> under all circumstances.

I think he means "the Windows APIs" within a Python program.

Skip


From timothy.grant at gmail.com  Wed Nov 29 15:51:22 2006
From: timothy.grant at gmail.com (Timothy Grant)
Date: Wed, 29 Nov 2006 12:51:22 -0800
Subject: Good script editor for Python on Mac OS 10.3
In-Reply-To: <pecora-F96D92.15371029112006@ra.nrl.navy.mil>
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
	<pecora-F96D92.15371029112006@ra.nrl.navy.mil>
Message-ID: <e775286d0611291251x62851470o996a9a7e4a3c6554@mail.gmail.com>

On 11/29/06, Lou Pecora <pecora at anvil.nrl.navy.mil> wrote:
> In article <1164830360.213197.182560 at l12g2000cwl.googlegroups.com>,
>  "Scott_Davies" <cloudrider9 at gmail.com> wrote:
>
> > Hi,
> >
> > I have an old Mac with OS X Panther installed.  I also have the Python
> > language download file, but I haven't got a text/script editor to use
> > for it.  Does anyone have a recommendation for a good Python text
> > editor in OS 10.3?
> >
> > Thanks,
> >
> > Scott D.
> >
>
> Try TextWrangler.  It's free.  I use it's big brother BBEdit and like it.
>
> -- Lou Pecora  (my views are my own) REMOVE THIS to email me.
> --
> http://mail.python.org/mailman/listinfo/python-list
>

As a long-time Vim user I still vote for shelling out the Euros for TextMate.

Fabulous editor...
fabulous support...
fabulous community.





-- 
Stand Fast,
    tjg.


From podi.ex at gmail.com  Wed Nov 22 20:05:32 2006
From: podi.ex at gmail.com (Podi)
Date: 22 Nov 2006 17:05:32 -0800
Subject: windows background process
In-Reply-To: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
References: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
Message-ID: <1164243932.585949.202250@b28g2000cwb.googlegroups.com>

Some update...

I just found out that the following seems to work,

import subprocess
subprocess.Popen(' myargs', executable='mycmd.exe')

However, it does not work with "my path\\mycmd.exe"

subprocess.Popen(' myargs', executable='"my path\\mycmd.exe"') # error



From johnjsal at NOSPAMgmail.com  Wed Nov 15 16:12:24 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 15 Nov 2006 16:12:24 -0500
Subject: Decimal() instead of float?
In-Reply-To: <1163322853.760315.51040@k70g2000cwa.googlegroups.com>
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
	<1163322853.760315.51040@k70g2000cwa.googlegroups.com>
Message-ID: <455b82a0$0$7054$c3e8da3@news.astraweb.com>

John Machin wrote:

> Here in Austraila, (I expect this is common to most countries), there
> are people who are utterly clueless about elementary data model rules,
> like identification "numbers" should be kept as strings.

Do you mean that ID numbers that serve as a primary key in a database 
should also be strings?


From martin at v.loewis.de  Mon Nov  6 13:06:49 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 06 Nov 2006 19:06:49 +0100
Subject: Building C extensions
In-Reply-To: <mailman.1806.1162818237.11739.python-list@python.org>
References: <mailman.1806.1162818237.11739.python-list@python.org>
Message-ID: <454f79b9$0$2320$9b622d9e@news.freenet.de>

Paolo Pantaleo schrieb:
> Well I'm just courious: if I want to buid a C extension, I shoul use
> the same compiler that has been used to build python (right?). Since
> python has been built using Visual C, how can I build an extension if
> I don't have Visual Studio?

If you don't have mingw32, either, you can't build the extension module.
You need to get a supported compiler. If you don't have one, find
somebody who builds the extension for you.

Regards,
Martin


From sjmachin at lexicon.net  Thu Nov  9 20:19:40 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 17:19:40 -0800
Subject: pack a three byte int
In-Reply-To: <1163120300.092721.96830@f16g2000cwb.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
	<1163115840.190634.5800@m73g2000cwd.googlegroups.com>
	<1163120300.092721.96830@f16g2000cwb.googlegroups.com>
Message-ID: <1163121579.988102.322250@h48g2000cwc.googlegroups.com>


p.lavarre at ieee.org wrote:
> > "struct" == "Python struct module"
> >
> > Struct module has (concise) codes B, H, I, Q for unsigned integers of
> > lengths 1, 2, 4, 8, but does *not* have a code for 3-byte integers.
>
> I thought that's what the manual meant, but I was unsure, thank you.

If it doesn't have a code for 3-byte integers in the table of codes, it
doesn't have one. What's to be unsure about??

>
> > > > 1. Not as concisely as a one-byte struct code
> >
> > Looks like you ignored the first word in the sentence ("Not").
>
> I agree I have no confident idea of what your English meant.

"Not" is rather unambiguous.

>
> I guess you're hinting at the solution you think I should find obvious,
> without volunteering what that is.

I did volunteer what it is -- try reading the message again. You may
need to use the PageDown key :-)

>
> Yes?  If so, then:

No, not at all. Stop guessing. I ask again: have you read the solution
that I gave???
Here it is again:

"""
You could try throwing the superfluous bits away before packing instead
of after:

| >>> from struct import pack
| >>> skip = 0x123456; count = 0x80
| >>> hi, lo = divmod(skip, 0x10000)
| >>> cdb = pack(">BBHBB", 0x08, hi, lo, count, 0)
| >>> ' '.join(["%02X" % ord(x) for x in cdb])
| '08 12 34 56 80 00'


>
> I guess for you "a one-byte struct code" is a 'B' provided as a "format
> character" of the fmt parameter of the struct.pack function.
>
> Yes?

Yes -- but I thought we were already over that.


> if so, then:

This does not follow.

>
> You recommend shattering the three byte int:

Yes, but not like that. See above.

>
> skip = 0x012345 ; count = 0x80
> struct.pack('>6B', 0x08, skip >> 0x10, skip >> 8, skip, count, 0)
>
> Except you know that chokes over:
>
> DeprecationWarning: 'B' format requires 0 <= number <= 255

That is not "choking" -- that is barfing; it is telling you that you
have done something silly.

>
> So actually you recommend:
>
> def lossypack(fmt, *args):
>         return struct.pack(fmt, *[(arg & 0xFF) for arg in args])
> skip = 0x012345 ; count = 0x80
> lossypack('>6B', 0x08, skip >> 0x10, skip >> 8, skip, count, 0)
>
> Yes?

No, never, not in a pink fit.

>
> > > I guess you're asking me ...
> > > to show more plainly that indeed I am trying
> > > to make sense of every word of every answer

You guess wrongly.

> 
> Am I helping?

No.



From matt.moriarity at gmail.com  Sat Nov 18 17:33:16 2006
From: matt.moriarity at gmail.com (Matt Moriarity)
Date: 18 Nov 2006 14:33:16 -0800
Subject: syntax error in sum(). Please explicate.
In-Reply-To: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
Message-ID: <1163889196.135008.126970@h54g2000cwb.googlegroups.com>

try surrounding your sum argument in brackets:

sum([phi(x // ps[i+1], i) for i in range(a)])

instead of:

sum(phi(x // ps[i+1], i) for i in range(a))

On Nov 18, 5:23 pm, Michael Press <j... at abc.net> wrote:
> I have not written python codes nor run any. I saw this
> code posted and decided to try it. It fails. I read the
> tutorial and the entry for the built in function sum,
> but still do not see the problem. The code was cut and
> paste. Please help. Thanks.
>
> _________________________BEGIN_CODE_________________________
> #!/usr/bin/python
>
> ps = [none, 2,3,5,7,11,13,17,19,23,29]
>
> def phi(x, a):
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>
> def pi(n):
>     from math import sqrt
>     if n <= 1:
>         return 0
>     a = pi(int(sqrt(n)))
>     return phi(n, a) + a - 1
> __________________________END_CODE__________________________
>
> Here is the result of running it:
>
>   File "/Users/mdp/source/prime_counter_python", line 6
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>                                           ^
> SyntaxError: invalid syntax
>
> Here are some lines from python -v:
>
> Python 2.3 (#1, Sep 13 2003, 00:49:11)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
> Type "help", "copyright", "credits" or "license" for more information
> 
> --
> Michael Press



From icetortoise at gmail.com  Thu Nov 23 22:33:00 2006
From: icetortoise at gmail.com (Andy)
Date: 23 Nov 2006 19:33:00 -0800
Subject: How do I find possible matches using regular expression?
In-Reply-To: <1164286433.937425.301490@j44g2000cwa.googlegroups.com>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
	<ek3umo$4m5$03$1@news.t-online.com>
	<1164286433.937425.301490@j44g2000cwa.googlegroups.com>
Message-ID: <1164339180.444298.49680@m7g2000cwm.googlegroups.com>

This works well as a checking strategy, but what I want is a suggesting
list...

Maybe what I want is not practical at all?

Thanks anyway Peter.

Andy Wu


Andy ??????

> The seems good to me, I'll try it out, thanks for the posting.
>
>
> "Peter Otten ??????
> "
> > Andy wrote:
> >
> > > I'm trying to do some predicting work over user input, here's my
> > > question:
> > >
> > > for pattern r'match me', the string 'no' will definitely fail to match,
> > > but 'ma' still has a chance if user keep on inputting characters after
> > > 'ma', so how do I mark 'ma' as a possible match string?
> >
> > The following may or may not work in the real world:
> >
> > import re
> >
> > def parts(regex, flags=0):
> >     candidates = []
> >     for stop in reversed(range(1, len(regex)+1)):
> >         partial = regex[:stop]
> >         try:
> >             r = re.compile(partial + "$", flags)
> >         except re.error:
> >             pass
> >         else:
> >             candidates.append(r)
> >     candidates.reverse()
> >     return candidates
> >
> > if __name__ == "__main__":
> >     candidates = parts(r"[a-z]+\s*=\s*\d+", re.IGNORECASE)
> >     def check(*args):
> >         s = var.get()
> >         for c in candidates:
> >             m = c.match(s)
> >             if m:
> >                 entry.configure(foreground="#008000")
> >                 break
> >         else:
> >             entry.configure(foreground="red")
> >
> >
> >     import Tkinter as tk
> >     root = tk.Tk()
> >     var = tk.StringVar()
> >     var.trace_variable("w", check)
> >     entry = tk.Entry(textvariable=var)
> >     entry.pack()
> >     root.mainloop()
> >
> > The example lets you write an assignment of a numerical value, e. g
> >
> > meaning = 42
> >
> > and colours the text in green or red for legal/illegal entries.
> > 
> > Peter



From no at spam.com  Tue Nov  7 15:06:35 2006
From: no at spam.com (Farshid Lashkari)
Date: Tue, 07 Nov 2006 12:06:35 -0800
Subject: C wrapper
In-Reply-To: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
Message-ID: <dG54h.6600$736.3574@newsfe16.phx>

Sheldon wrote:
> Can anyone give me some idea as to what this error means?
> 
> "ImportError: dynamic module does not define init function "
> 
> I am new at this and there is still a lot to learn.
> 
> Any help is appreciated,

Take a look at the documentation for creating extension modules, 
especially the following page:

http://docs.python.org/ext/methodTable.html

"The initialization function must be named initname(), where name is the 
name of the module, and should be the only non-static item defined in 
the module file"

-Farshid


From inq1ltd at verizon.net  Tue Nov  7 10:38:53 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Tue, 07 Nov 2006 10:38:53 -0500
Subject: Simple Tkinter problem
In-Reply-To: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>
References: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>
Message-ID: <200611071038.53216.inq1ltd@verizon.net>


Greg,

Run the following code to see how pack_forget() or 
grid_forget() works, it makes previous widgets 
disappear but not go away.  If you call grid() or 
pack() again after using grid_forget() the widget 
returns. 


root = Tk()
class Ktest:
    def __init__(self):
        self.Ftest1()

    def  Ftest1(self):

        try:    
            self.test2.grid_forget()
        except AttributeError :
            pass
        self.test1 = Button(root, text='Push #1
               button', bg = 'yellow', width = 25,
                command = self.Ftest2,
                 height = 25)
        self.test1.grid(row=0, column=0)


    def Ftest2(self):
       self.test1.grid_forget()
       self.test2 = Button(root, text='Push #2 
                       button', bg = 'green',
                         width = 15,
                        command = self.Ftest1,
                         height = 10)
       self.test2.grid(row=0, column=0)

if __name__==  '__main__' :
    Ktest()
    mainloop()



Maybe someone else has an idea about not defining 
a variable.  

My question is how does a budket of wires and 
screws know its a bucket of wires and screws 
unless someone tells it that it's a bucket of 
wires and screws? 








On Tuesday 07 November 2006 09:35, 
gmarkowsky at gmail.com wrote:
> Hi all,
>
> I'm trying to write a GUI that will put up
> multiple widgets in succession. My problem is
> that each widget also contains the previous
> widgets when they pop up. How do I reinitialize
> the widget each time so that it doesn't contain
> earlier ones? Actually, another question I have
> is, is there a way to set python so that it
> will assume any undefined variable is 0 or ''?
> That is, I have several statements like "If k >
> 0 then so and so" and I would like it to assume
> k=0 unless I tell it otherwise. I've just been
> defining k=0 at the start of the program but it
> seems there should be a better way.
>
> Greg


From rrr at ronadam.com  Sat Nov 11 16:02:28 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 11 Nov 2006 15:02:28 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej5asp$e85$1@news.albasani.net>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
Message-ID: <ej5e06$rvq$1@sea.gmane.org>

Georg Brandl wrote:
> Ron Adam wrote:
>> Michael Hobbs wrote:
>>
>>> The same problem that is solved by not having to type parens around the 
>>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>>> months and got very comfortable with just typing the if conditional and 
>>> hitting return, without any extra syntax. When I came back to Python, I 
>>> found that I felt annoyed every time I typed the colon, since it 
>>> obviously isn't required. The FAQ says that the colon increases 
>>> readability, but I'm skeptical. The indentation seems to provide more 
>>> than enough of a visual clue as to where the if conditional ends.

>> I'm not sure why '\'s are required to do multi-line before the colon.
> 
> Special cases aren't special enough to break the rules.
> 
> Georg

A bit of a circular answer.

     Why the rule? -> So not to break the rule?


I would guess this probably is more applicable in this case.

     Explicit is better than implicit.


Ron









From mike.klaas at gmail.com  Thu Nov 23 14:24:35 2006
From: mike.klaas at gmail.com (Klaas)
Date: 23 Nov 2006 11:24:35 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.620.1164259740.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<mailman.620.1164259740.32031.python-list@python.org>
Message-ID: <1164309875.039952.77740@m7g2000cwm.googlegroups.com>

Tennessee writes:
>    * If you say LaTex, I'll eat your brain. Or my hat. Unless I'm
> seriously underrating it, but I don't think so.

Why?  It is a suitable solution to this problem.  You can produce
unformatted content, then produce pdf and html pages from it.

-Mike



From Tim.Golden at viacom-outdoor.co.uk  Wed Nov 22 06:47:15 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 22 Nov 2006 11:47:15 -0000
Subject: file backup in windows
In-Reply-To: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B60F@vogbs009.gb.vo.local>

[... snip ...]

| ---------------------------------------------------
| how can i make the following code work, I have probelm with filepath
| declaration.
| ---------------------------------------------------
| import os, shutil
| filepath = ' C:\\Documents and Settings\\060577\\Local
| Settings\\Application Data\\Microsoft\\Outlook\\* '
| backup = ' D:\\temp\\outlook '
| os.system ("xcopy /s %s %s" % (filepath, backup))
| -----------------------------------------

... also, for various ways of copying files around
under Windows in Python, see:

http://tgolden.sc.sabren.com/python/win32_how_do_i/copy-a-file.html

TJG

________________________________________________________________________
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From robin at NOSPAMreportlab.com  Thu Nov  9 17:41:45 2006
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Thu, 09 Nov 2006 22:41:45 +0000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <mailman.2001.1163109689.11739.python-list@python.org>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>	<45533D9F.5020002@chamonix.reportlab.co.uk>
	<mailman.2001.1163109689.11739.python-list@python.org>
Message-ID: <4553AEA9.5040902@jessikat.plus.net>

Andrew MacIntyre wrote:
> Robin Becker wrote:
> 
>> I think it uses sysv semaphores and although freeBSD 6 has them 
>> perhaps there's something I need to do to allow them to work.
> 
> IIRC, you need to explicitly configure loading the kernel module, or
> compile the kernel with the necessary option in the config file.
> 
I tried loading the module, but it seems already to be in the kernel. 
Probably some sysctl stuff to do.

-- 
Robin Becker


From attn.steven.kuo at gmail.com  Wed Nov  1 21:38:22 2006
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 1 Nov 2006 18:38:22 -0800
Subject: re question
References: <eibipo$4pn$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1162435102.490450.288710@h48g2000cwc.googlegroups.com>

Sch?le Daniel wrote:

(snipped)

> I am trying to construct a case where a greedy and
> non greedy operation produce different result.
> I dont see the difference between 'a??b' and 'a?b'
> As far I understand is that ? will first try to match a
> (it's greedy) and only if it fails then it step back
> and lets a unmatched. The other doesn't match a at first,
> only if the pattern fails to match it steps back and match a.
>
> But don't they do eventually the same thing?
> Can someone provide an example where 2 patterns yield
> different results.
>

Perhaps this sheds some light
on the matter:


>>> import re
>>> string = "aaaba"

>>> one =  re.findall(r'a?b?', string)
>>> two =  re.findall(r'a??b?', string)

>>> print one, two

Yields:

['a', 'a', 'ab', 'a', ''] ['', '', '', 'b', '', '']


-- 
Hope this helps,
Steven



From eric_brunel at despammed.com  Wed Nov 15 03:16:12 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 15 Nov 2006 09:16:12 +0100
Subject: Tkinter: Strange behavior using place() and changing cursors
References: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
	<slrneljmv7.1kp.wojciech_mula@cat.tac>
	<1163522752.447520.86910@k70g2000cwa.googlegroups.com>
Message-ID: <op.ti1s9aizrqur0o@eb.pragmadev>

On Tue, 14 Nov 2006 17:45:52 +0100, Mudcat <mnations at gmail.com> wrote:
> The problem is I need the ability to change it dynamically. I don't
> want the cursor to be the double_arrow the whole time the mouse hovers
> inside that frame. It's supposed to be a resize arrow when the mouse is
> on the frame border, and regular cursor once it passes to the inner
> part of the frame.

Why don't you create a Frame for the inside with no border, and another  
Frame for the border? This way, you can have a cursor setting for each of  
them, i.e one for the inside and one for the border.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From paul at boddie.org.uk  Thu Nov  9 11:27:37 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Nov 2006 08:27:37 -0800
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
Message-ID: <1163089657.164900.112820@f16g2000cwb.googlegroups.com>

Michael Hobbs wrote:
>
> I think the colon could be omitted from every type of compound
> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?

The FAQ answer. ;-)

http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements

Paul



From steven.bethard at gmail.com  Fri Nov  3 12:57:32 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Fri, 3 Nov 2006 17:57:32 +0000 (GMT)
Subject: python-dev Summary for 2006-09-01 through 2006-09-15
Message-ID: <20061103175734.854011E4004@bag.python.org>

python-dev Summary for 2006-09-01 through 2006-09-15
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-09-01_2006-09-15]



=============
Announcements
=============

----------------------------
QOTF: Quote of the Fortnight
----------------------------

Through a cross-posting slip-up, Jean-Paul Calderone managed to provide us with some inspiring thoughts on mailing-list archives:

    One could just as easily ask why no one bothers to read mailing list
    archives to see if their question has been answered before.

    No one will ever know, it is just one of the mysteries of the universe.

Contributing thread:

- `[Twisted-Python] Newbie question <http://mail.python.org/pipermail/python-dev/2006-September/068682.html>`__

-------------------------
Monthly Arlington sprints
-------------------------

Jeffrey Elkner has arranged for monthly Arlington Python sprints. See the `Arlington sprint wiki`_ for more details.

.. _Arlington sprint wiki: http://wiki.python.org/moin/ArlingtonSprint

Contributing thread:

- `Arlington sprints to occur monthly <http://mail.python.org/pipermail/python-dev/2006-September/068688.html>`__

=========
Summaries
=========

-----------------------------------------
Signals, threads and blocking C functions
-----------------------------------------

Gustavo Carneiro explained a problem that pygtk was running into.  Their main loop function, ``gtk_main()``, blocks forever. If there are threads in the program, they cannot receive signals because Python catches the signal and calls ``Py_AddPendingCall()``, relying on the main thread to call ``Py_MakePendingCalls()``.  Since with pygtk, the main thread is blocked calling a C function, it has no way other than polling to decide when ``Py_MakePendingCalls()`` needs to be called.  Gustavo was hoping for some sort of API so that his blocking thread could get notified when ``Py_AddPendingCall()`` had been called.

There was a long discussion about the feasibility of this and other solutions to his problem. One of the main problems is that almost nothing can safely be done from a signal handler context, so some people felt like having Python invoke arbitrary third-party code was a bad idea. Gustavo was reasonably confident that he could write to a pipe within that context, which was all he needed to do to solve his problem, but Nick Maclaren explained in detail some of the problems, e.g. writing proper synchronization primitives that are signal-handler safe.

Jan Kanis suggested that threads in a pygtk program should occasionally check the signal handler flags and calls PyGTK's callback to wake up the main thread. But Gustavo explained that things like the GnomeVFS library have their own thread pools and know nothing about Python so can't make such a callback.

Adam Olsen suggested that Python could create a single non-blocking pipe for all signals. When a signal was handled, the signal number would be written to that pipe as a single byte. Third-party libraries, like pygtk, could poll the appropriate file descriptor, waking up and handing control back to Python when a signal was received. There were some disadvantages to this approach, e.g. if there is a large burst of signals, some of them would be lost, but folks seemed to think that these kinds of things would not cause many real-world problems. Gustavo and Adam then worked out the code in a little more detail.

The `Py_signal_pipe patch`_ was posted to SourceForge.

.. _Py_signal_pipe patch: http://bugs.python.org/1564547

Contributing thread:

- `Signals, threads, blocking C functions <http://mail.python.org/pipermail/python-dev/2006-September/068569.html>`__

------------------------
API for str.rpartition()
------------------------

Raymond Hettinger pointed out that in cases where the separator was not found, ``str.rpartition()`` was putting the remainder of the string in the wrong spot, e.g. ``str.rpartition()`` worked like::

    'axbxc'.rpartition('x') == ('axb', 'x', 'c')
    'axb'.rpartition('x') == ('a', 'x', 'b')
    'a'.rpartition('x') == ('a', '', '')  # should be ('', '', 'a')

Thus code that used ``str.rpartition()`` in a loop or recursively would likely never terminate. Raymond checked in a fix for this, spawning an enormous discussion about how the three bits ``str.rpartition()`` returns should be named.  There was widespread disagreement on which side was the "head" and which side was the "tail", and the only unambiguous one seemed to be "left, sep, right". Raymond and others were not as happy with this version because it was no longer suggestive of the use cases, but it looked like this might be the best compromise.

Contributing threads:

- `Problem withthe API for str.rpartition() <http://mail.python.org/pipermail/python-dev/2006-September/068565.html>`__
- `Fwd: Problem withthe API for str.rpartition() <http://mail.python.org/pipermail/python-dev/2006-September/068615.html>`__

---------------
Unicode Imports
---------------

Kristjan V. Jonsson submitted a `unicode import patch`_ that would allow unicode paths in sys.path and use the unicode file API on Windows. It got a definite "no" from the Python 2.5 release managers since it was already too late in the release process. Nonetheless there was a long discussion about whether or not it should be considered a bug or a feature. Martin v. Lowis explained that it was definitely a feature because it would break existing introspection tools expecting things like __file__ to be 8-bit strings (not unicode strings as they would be with the patch).

.. _unicode import patch: http://bugs.python.org/1552880

Contributing thread:

- `Unicode Imports <http://mail.python.org/pipermail/python-dev/2006-September/068686.html>`__

-------------------------
Exception and __unicode__
-------------------------

Marcin 'Qrczak' Kowalczyk reported a `TypeError from unicode()`_ when applied to an Exception class. Brett Cannon explained the source of this: BaseException defined a ``__unicode__`` descriptor which was complaining when it was handed a class, not an instance. The easiest solution seemed to be the best for Python 2.5: simply rip out the ``__unicode__`` method entirely. M.-A. Lemburg suggested that for Python 2.6 this should be fixed by introducing a tp_unicode slot.

.. _TypeError from unicode(): http://bugs.python.org/1551432

Contributing thread:

- `2.5 status <http://mail.python.org/pipermail/python-dev/2006-September/068607.html>`__

--------------------------
Slowdown in inspect module
--------------------------

Fernando Perez reported an enormous slowdown in Python 2.5's inspect module. Nick Coghlan figured out that this was a result of ``inspect.findsource()`` calling ``os.path.abspath()`` and ``os.path.normpath()`` repeatedly on the module's file name. Nick provided a `patch to speed things up`_ by caching the absolute, normalized file names.

.. _patch to speed things up: http://bugs.python.org/1553314

Contributing thread:

- `inspect.py very slow under 2.5 <http://mail.python.org/pipermail/python-dev/2006-September/068656.html>`__

--------------------------------
Cross-platform float consistency
--------------------------------

Andreas Raab asked about trying to minimize some of the cross-platform differences in floating-point calcuations, by using something like fdlibm_. Tim Peters pointed him to a `previous thread on this issue`_ and suggested that best route was probably to package a Python wrapper for fdlibm_ and see how much interest there was.

.. _fdlibm: http://www.netlib.org/fdlibm/
.. _previous thread on this issue: http://mail.python.org/pipermail/python-list/2005-July/290164.html

Contributing thread:

- `Cross-platform math functions? <http://mail.python.org/pipermail/python-dev/2006-September/068599.html>`__

-----------------------------------
Refcounting and errors in functions
-----------------------------------

Mihai Ibanescu pointed out that refcount status for functions that can fail is generally poorly documented. Greg Ewing explained that refcounting behavior should be independent of whether the call succeeds or fails, but it was clear that this was not always the case. Mihai promised to file a low-severity bug so that this problem wouldn't be lost.

Contributing thread:

- `Py_BuildValue and decref <http://mail.python.org/pipermail/python-dev/2006-September/068708.html>`__

------------
Python 2.3.6
------------

Barry Warsaw offered to push out a Python 2.3.6 if folks were interested in getting some bugfixes out to the platforms which were still running Python 2.3.  After an underwhelming response, he retracted the offer.  (Stay tuned though - more on 2.3.6 in future summaries.)

Contributing threads:

- `Interest in a Python 2.3.6? <http://mail.python.org/pipermail/python-dev/2006-August/068520.html>`__
- `Interest in a Python 2.3.6? <http://mail.python.org/pipermail/python-dev/2006-September/068731.html>`__
- `Python 2.4.4 was: Interest in a Python 2.3.6? <http://mail.python.org/pipermail/python-dev/2006-September/068737.html>`__

-----------------------------------
Effbot Python library documentation
-----------------------------------

Johann C. Rocholl asked about the status of http://effbot.org/lib/, Fredrik Lundh's alternative format and rendering for the Python library documentation. Fredrik indicated that due to the pushback from some folks on python-dev, they've been working mainly "under the radar" on this. (At least until some inconsiderate soul put them in the summary...) ;-)

Contributing threads:

- `That library reference, yet again <http://mail.python.org/pipermail/python-dev/2006-August/068556.html>`__
- `That library reference, yet again <http://mail.python.org/pipermail/python-dev/2006-September/068561.html>`__


================
Deferred Threads
================
- `IronPython and AST branch <http://mail.python.org/pipermail/python-dev/2006-September/068778.html>`__


==================
Previous Summaries
==================
- `Py2.5 issue: decimal context manager misimplemented, misdesigned, and misdocumented <http://mail.python.org/pipermail/python-dev/2006-September/068564.html>`__
- `Error while building 2.5rc1 pythoncore_pgo on VC8 <http://mail.python.org/pipermail/python-dev/2006-September/068582.html>`__
- `gcc 4.2 exposes signed integer overflows <http://mail.python.org/pipermail/python-dev/2006-September/068602.html>`__
- `no remaining issues blocking 2.5 release <http://mail.python.org/pipermail/python-dev/2006-September/068606.html>`__
- `new security doc using object-capabilities <http://mail.python.org/pipermail/python-dev/2006-September/068673.html>`__


===============
Skipped Threads
===============
- `A test suite for unittest <http://mail.python.org/pipermail/python-dev/2006-September/068558.html>`__
- `Fwd: [Python-checkins] r51674 - python/trunk/Misc/Vim/vimrc <http://mail.python.org/pipermail/python-dev/2006-September/068562.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-September/068567.html>`__
- `Windows build slave down until Tuesday-ish <http://mail.python.org/pipermail/python-dev/2006-September/068573.html>`__
- `[Python-checkins] TRUNK IS UNFROZEN, available for 2.6 work if you are so inclined <http://mail.python.org/pipermail/python-dev/2006-September/068605.html>`__
- `Exception message for invalid with statement usage <http://mail.python.org/pipermail/python-dev/2006-September/068665.html>`__
- `buildbot breakage <http://mail.python.org/pipermail/python-dev/2006-September/068671.html>`__
- `Change in file() behavior in 2.5 <http://mail.python.org/pipermail/python-dev/2006-September/068678.html>`__
- `'with' bites Twisted <http://mail.python.org/pipermail/python-dev/2006-September/068681.html>`__
- `What windows tool chain do I need for python 2.5 extensions? <http://mail.python.org/pipermail/python-dev/2006-September/068709.html>`__
- `2.5c2 <http://mail.python.org/pipermail/python-dev/2006-September/068742.html>`__
- `_PyGILState_NoteThreadState should be static or not? <http://mail.python.org/pipermail/python-dev/2006-September/068743.html>`__
- `BRANCH FREEZE: release25-maint, 00:00UTC 12 September 2006 <http://mail.python.org/pipermail/python-dev/2006-September/068745.html>`__
- `datetime's strftime implementation: by design or bug <http://mail.python.org/pipermail/python-dev/2006-September/068747.html>`__
- `Subversion 1.4 <http://mail.python.org/pipermail/python-dev/2006-September/068761.html>`__
- `RELEASED Python 2.5 (release candidate 2) <http://mail.python.org/pipermail/python-dev/2006-September/068766.html>`__
- `Maybe we should have a C++ extension for testing... <http://mail.python.org/pipermail/python-dev/2006-September/068768.html>`__
- `.pyc file has different result for value "1.79769313486232e+308" than .py file <http://mail.python.org/pipermail/python-dev/2006-September/068769.html>`__
- `release is done, but release25-maint branch remains near-frozen <http://mail.python.org/pipermail/python-dev/2006-September/068773.html>`__
- `fun threading problem <http://mail.python.org/pipermail/python-dev/2006-September/068774.html>`__
- `Thank you all <http://mail.python.org/pipermail/python-dev/2006-September/068779.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
September 01, 2006 through September 15, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
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This python-dev summary is the 12th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

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

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

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From duncan.booth at invalid.invalid  Fri Nov 24 03:18:48 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Nov 2006 08:18:48 GMT
Subject: Local variables persist in functions?
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <Xns988554943C60Bduncanbooth@127.0.0.1>

120psi at gmail.com wrote:

> 
> Considering the default value of _curList, these statements should be
> identical.  Any pointers?  Did I miss something in the python reference
> manual?  (running 2.4.3, fyi)

See the FAQ:

http://www.python.org/doc/faq/general.html#why-are-default-values-shared-between-objects


From ptmcg at austin.rr._bogus_.com  Sat Nov 18 08:02:52 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 18 Nov 2006 13:02:52 GMT
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org><1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<mailman.408.1163844581.32031.python-list@python.org><FaC7h.73$_H5.19@tornado.texas.rr.com>
	<mailman.412.1163853827.32031.python-list@python.org>
Message-ID: <0wD7h.77$_H5.56@tornado.texas.rr.com>

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.412.1163853827.32031.python-list at python.org...
> Paul McGuire wrote:
>
>> maybe time to switch to decaf... :)
>
> do you disagree with my characterization of the state of the XML universe?
>
> </F>
>
Thankfully, I'm largely on the periphery of that universe (except for being 
a sometimes victim).  But it is certainly frustrating to see many of the OMG 
concepts of the 90's reimplemented in Java services, and then again in 
XML/SOAP, with no detectable awareness that these messaging and 
serialization problems have been considered before, and much more 
thoroughly.

I liked XML when I could read it and hack it out in Notepad.  I like 
attributes, which puts me on the outs with most XML zealots who forswear the 
use of attributes on purely academic grounds (they defeat the future 
possible expansion of an attribute's value into more complex substructure). 
I dislike namespaces, especially the default xmlns kind, as they make me 
take extra steps when retrieving nodes via Xpaths; and everyone seems to 
think their application needs namespaces, when there is no threat that these 
tags will ever get mixed up with anyone else's.

No, I was mostly amused (which I thought was your intent, given the trailing 
smiley) at your breathless, quasi-rant against the XML milieu in general - I 
think your one sentence went on for about 15 lines!

-- Paul 




From no-spam at no-spam-no-spam.invalid  Fri Nov 17 06:26:36 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 17 Nov 2006 12:26:36 +0100
Subject: numpy magic: cast scalar returns auto to python types float & int
 ?
Message-ID: <ejk69e$2g1$1@news.albasani.net>

Turning algs for old NumPy modules into numpy code I suffer from this:
Upon further processing of returns of numpy calculations, lots of data in an apps object tree will become elementary numpy types.
First there is some inefficiency in calculations. And then you get data inflation and questionable dependencies - e.g. with pickle,ZODB,mpi's ... :


>>> l=array((1.,0))
>>> l.prod()
0.0
>>> cPickle.dumps(_)
"cnumpy.core.multiarray\nscalar\np1\n(cnumpy\ndtype\np2\n(S'f8'\nI0\nI1\ntRp3\n(I2\nS'<'\nNNNI-1\nI-1\ntbS'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'\ntRp4\n."
>>> cPickle.dumps(0.0)
'F0\n.'
>>> l=array((1,0))
>>> l.prod()
0
>>> cPickle.dumps(_)
"cnumpy.core.multiarray\nscalar\np1\n(cnumpy\ndtype\np2\n(S'i4'\nI0\nI1\ntRp3\n(I2\nS'<'\nNNNI-1\nI-1\ntbS'\\x00\\x00\\x00\\x00'\ntRp4\n."
>>> cPickle.dumps(0)
'I0\n.'
>>> type(l.prod())
<type 'numpy.int32'>


To avoid this you'd need a type cast in Python code everywhere you get scalars from numpy into a python variable. Error prone task. Or check/re-render your whole object tree.
Wouldn't it be much better if numpy would return Python scalars for float64 (maybe even for float32) and int32, int64 ... where possible? (as numarray and Numeric did)
I suppose numpy knows internally very quickly how to cast. 
Or is there maybe a config-setting to turn numpy this way?

Robert


From hg at nospam.com  Wed Nov 22 13:38:06 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 12:38:06 -0600
Subject: utf - string translation
Message-ID: <yR09h.1987$%_2.506@newsfe19.lga>

Hi,

I'm bringing over a thread that's going on on f.c.l.python.

The point was to get rid of french accents from words.

We noticed that len('?') != len('a') and I found the hack below to fix
the "problem" ... yet I do not understand - especially since '?' is
included in the extended ASCII table, and thus can be stored in one byte.

Any clue ?

hg





# -*- coding: utf-8 -*-
import string

def convert(mot):
    print len(mot)
    print mot[0]
    print '%x' % ord(mot[1])
    table =
string.maketrans('??????????????','\x00a\x00a\x00a\x00e\x00e\x00e\x00e\x00i\x00i\x00o\x00o\x00u\x00u\x00u')

    return mot.translate(table).replace('\x00','')


c = '?b?? a '
print convert(c)


From sjmachin at lexicon.net  Tue Nov 14 06:44:43 2006
From: sjmachin at lexicon.net (John Machin)
Date: 14 Nov 2006 03:44:43 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
Message-ID: <1163504683.480050.242050@h54g2000cwb.googlegroups.com>

billpaterson2006 at googlemail.com wrote:
> I've been working on some code to search for specific textstrings and
> act upon them insome way. I've got the conversion sorted

What does that mean? There is no sort in the computer sense, and if you
mean as in "done" ...

> however there
> is 1 problem remaining.
>
> I am trying to work out how to make it find a string like this "==="
> and when it has found it, I want it to add "===" to the end of the
> line.

The answer is at the end. Now take a deep breath, and read on carefully
and calmly:

>
> For example.
>
> The text file contains this:
>
> ===Heading
>
> and I am trying to make it be processed and outputted as a .dat file
> with the contents
>
> ===Heading===
>
> Here's the code I have got so far.
>
> import string

Not needed for this task. In fact the string module has only minimal
use these days. From what book or tutorial did you get the idea to use
result = string.replace(source_string, old, new) instead of result =
source_string.replace(old, new) sometimes? You should be using the
result = source_string.replace(old, new) way all the time.

What version of Python are you using?

> import glob
> import os
>
> mydir = os.getcwd()
> newdir = mydir#+"\\Test\\";

Try and make a real comment obvious; don't do what you did -- *delete*
unwanted code; alternatively if it may be wanted in the future, put in
a real comment to say why.

What was the semicolon for?

Consider using os.path.join() -- it's portable. Don't say "But my code
will only ever be run on Windows". If you write code like that, it will
be a self-fulfilling prophecy -- no-one will want try to run it
anywhere else.

>
> for filename in glob.glob1(newdir,"*.txt"):
>     #print "This is an input file: " + filename
No it isn't; it's a *name* of a file
>     fileloc = newdir+"\\"+filename
>     #print fileloc
>
>     outputname = filename
>     outputfile = string.replace(outputname,'.txt','.dat')

No again, it's not a file.

Try outputname = filename.replace('.txt', '.dat')
Also consider what happens if the name of the input file is foo.txt.txt
[can happen]

>     #print filename
>     #print a
>
>     print "This is an input file: " + filename + ".  Output file:
> "+outputfile

No it isn't.


>
>     #temp = newdir + "\\" + outputfile
>     #print temp
>
>
>     fpi = open(fileloc);
>     fpo = open(outputfile,"w+");

Why the "+"?
Semi-colons?

>
>     output_lines = []

Why not just write as you go? What happens with a 1GB file? How much
memory do you have on your computer?


>     lines = fpi.readlines()

Whoops. That's now 2GB min of memory you need

>
>     for line in lines:

No, use "for line in fpi"

>         if line.rfind("--------------------") is not -1:

Quick, somebody please count the "-" signs in there; we'd really like
to know what this program is doing. If there are more identical
characters than you have fingers on your hand, don't do that. Use
character.repeat(count). Then consider giving it a name. Consider
putting in a comment to explain what your code is doing. If you can,
like why use rfind instead of find -- both will give the same result if
there are 0 or 1 occurrences of the sought string, and you aren't using
the position if there are 1 or more occurences. Then consider that if
you need a a comment for code like that, then maybe your variable names
are not very meaningful.

>             new = line.replace("------------------","----")

Is that the same number of "-"? Are you sure?

>         elif line.rfind("img:") is not -1:
>             new = line.replace("img:","[[Image:")
>         elif line.rfind(".jpg") is not -1:
>             new = line.replace(".jpg",".jpg]]")

That looks like a pattern to me. Consider setting up a list of (old,
new) tuples and looping over it.

>         elif line.rfind(".gif") is not -1:
>             new = line.replace(".gif",".gif]]")
>         else:
>             output_lines.append(line);
>             continue
>         output_lines.append(new);
>

Try this:
   else:
        new = line
   fpo.write(new)

> for line in output_lines:
>     fpo.write(line)
>
> fpi.close()
> fpo.flush()

News to me that close() doesn't automatically do flush() on a file
that's been open for writing.

> fpo.close()
>
>
> I hope this gets formatted correctly :-p
>
> Cheers, hope you can help.

Answer to your question:

string1 in string2 beats string2.[r]find(string1) for readability and
(maybe) for speed too

elif "===" in line: # should be same to assume your audience can count
to 3 
   new = line[:-1] + "===\n"

HTH,
John



From swayne at localhost  Fri Nov 24 10:42:21 2006
From: swayne at localhost (Steven Wayne)
Date: Fri, 24 Nov 2006 09:42:21 -0600
Subject: Python work in UK
References: <4565f638$0$2447$db0fefd9@news.zen.co.uk>
Message-ID: <slrneme4mn.drc.swayne@wayne.powernet>

On Thu, 23 Nov 2006 19:28:26 +0000, Will McGugan
	<will at willNOmcguganSPAM.com> wrote:
> Hi,
>
> I'd love to work in Python, for the sake of my blood pressure, but there 
> doesnt seem to be that many jobs that look for Python as the main skill. 
> I use Python at work from time to time, and occasionaly get to spend 
> several days on a Python project but the majority of the time I use C++. 
> How can I make that leap to working with Python? There doesn't seem to 
> be many UK positions on the jobs section of Python.org or the usual jobs 
> sites. Any recommended jobs sites or tips? (I have googled)
>
> In the off chance that a potential empolyer is reading this, I'm looking 
> for something in web development, applications, graphics or other 
> interesting field. Here is a copy of my CV.
>
> http://www.willmcgugan.com/cvwillmcgugan.pdf
>
> Regards,
>
> Will McGugan

www.riverhall.co.uk are looking.

Steven
-- 
 .''`.
: :'  :
`. `'`
  `-


From rajani.vemula at gmail.com  Thu Nov  9 07:08:42 2006
From: rajani.vemula at gmail.com (Raj)
Date: 9 Nov 2006 04:08:42 -0800
Subject: Post data to http server using libcurl
Message-ID: <1163074121.820503.38410@m7g2000cwm.googlegroups.com>

Hi,
I am newbie to programming with libcurl. the problem is i want to send
my gmail username and password outside the browser and get access to my
mail. this i am doing with LibCurl. Though i dont get any errors, i am
nt able to get the o/p Can anyone kindly help. i will attach the
program here
#include <curl/curl.h>
 #include <curl/types.h>
 #include <curl/easy.h>

 int main(int argc, char *argv[])
 {
   CURL *curl;
   CURLcode res;

   struct curl_httppost *formpost=NULL;
   struct curl_httppost *lastptr=NULL;
   struct curl_slist *headerlist=NULL;
   char buf[] = "Expect:";

   curl_global_init(CURL_GLOBAL_ALL);

   /* Fill in the file upload field */
   curl_formadd(&formpost,
              &lastptr,
                CURLFORM_COPYNAME, "rajani.vemula",
                CURLFORM_END);

   /* Fill in the filename field */
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "xxxxx",
                CURLFORM_END);
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "null",
                CURLFORM_COPYCONTENTS, "Sign in",
                CURLFORM_END);




   curl = curl_easy_init();
   /* initalize custom header list (stating that Expect: 100-continue
is
 not
      wanted */
   headerlist = curl_slist_append(headerlist, buf);
   if(curl) {
     /* what URL that receives this POST */
     curl_easy_setopt(curl, CURLOPT_URL,"
http://mail.google.com/mail");
     curl_easy_setopt(curl, CURLOPT_PROXY, "proxyname");
   curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "User:Password)";
       /* only disable 100-continue header if explicitly requested */
       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
     res = curl_easy_perform(curl);

     /* always cleanup */
     curl_easy_cleanup(curl);

     /* then cleanup the formpost chain */
     curl_formfree(formpost);
      curl_slist_free_all(headerlist
  }
   return 0;
 }

Thanks



From jaap at nospaml.com  Mon Nov  6 14:25:58 2006
From: jaap at nospaml.com (Jaap)
Date: Mon, 06 Nov 2006 20:25:58 +0100
Subject: tips requested for a log-processing script
In-Reply-To: <mailman.1796.1162794121.11739.python-list@python.org>
References: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>
	<mailman.1796.1162794121.11739.python-list@python.org>
Message-ID: <454f8c45$0$10757$e4fe514c@dreader29.news.xs4all.nl>

Hendrik van Rooyen schreef:
> "Jaap" <jaap at nospaml.com> wrote:
> 
> 
>> Python ers,
Thanks!
all your replies have been both to the point and helpfull for me.

You have proven both Python and it's community are open and welcoming to 
new users.

Jaap


From robert.kern at gmail.com  Fri Nov  3 10:39:50 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 03 Nov 2006 07:39:50 -0800
Subject: Python in sci/tech applications
In-Reply-To: <eifg8f$96s$1@wake.carmen.se>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>	<mailman.1678.1162491833.11739.python-list@python.org>	<eiden1$sj0$1@news.albasani.net>
	<eifg8f$96s$1@wake.carmen.se>
Message-ID: <eifns7$17t$1@sea.gmane.org>

Magnus Lycka wrote:
> robert wrote:
>> When one follows ..
>> http://docs.python.org/inst/tweak-flags.html#SECTION000622000000000000000 
>> http://www.zope.org/Members/als/tips/win32_mingw_modules
>>
>> ..this seems only to cover the immediate python dll issues. What happens 
>> with the C runtime libraries? You'll bind 2 different C-RTLs (DLLs) 
>> etc.? And what happens for example with heap objects created with one 
>> C-RTL and deleted/free'd with the other?
> 
> As far as I understand, there should be only one runtime library
> involved. MinGW relies on the Microsoft runtime. It seems some
> people have had problems using MSVCRT71 with MinGW, but I'm sure
> that e.g. the Enthought people can explain those issues, since they
> bundle MinGW in their Python 2.4 distribution.

No, there are two if you use an unmodified Mingw distribution. Mingw is built 
around MSVCRT.dll . For many extensions, this doesn't cause a problem since 
things like FILE pointer don't cross C runtime boundaries. One can edit gcc's 
spec file to make it use MSVCR71.dll . However, Mingw's headers are still 
written for MSVCRT.dll and Microsoft changed some of the internal details that 
they rely upon. For many (most?) extensions, this won't matter, either. C++ 
extensions using iostreams have a problem, IIRC. Unfortunately, neither approach 
works for all extensions. It may even be the case that some extensions won't 
work under *either* method.

-- 
Robert Kern

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



From inq1ltd at verizon.net  Wed Nov  8 12:03:46 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 08 Nov 2006 12:03:46 -0500
Subject: Python Error:IndentationError: expected an indented block
In-Reply-To: <20061108154702.61516.qmail@web58107.mail.re3.yahoo.com>
References: <20061108154702.61516.qmail@web58107.mail.re3.yahoo.com>
Message-ID: <200611081203.46919.inq1ltd@verizon.net>


try this

  def DoCsubnet1 (action, subject, target,
                            args): 
       pass



jim-on-linux
http://www.inqvista.com




On Wednesday 08 November 2006 10:47, Antonios 
Katsikadamos wrote:
> hi all. I try to run an old python code and i
> get the following message
>
>  File "/home/antonis/db/access.py", line 119
>      def DoCsubnet1 (action, subject, target,
> args):             # DoC servers net ^
>  IndentationError: expected an indented block
>
>  1) and I don't know what causes it. I would be
> grate full if you could give me a tip.
>
>  2) how can i overcome it? Can i use the
> keyword pass?and if how ccan i use it
>
>
>  Kind regards,
>
>  Antonios
>
>


From joncle at googlemail.com  Thu Nov  9 08:33:46 2006
From: joncle at googlemail.com (Jon Clements)
Date: 9 Nov 2006 05:33:46 -0800
Subject: newbie class-building question
In-Reply-To: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
References: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
Message-ID: <1163079226.645574.214770@m73g2000cwd.googlegroups.com>


jrpfinch wrote:

> I am constructing a simple class to make sure I understand how classes
> work in Python (see below this paragraph).
>
> It works as expected, except the __add__ redefinition.  I get the
> following in the Python interpreter:
>
> >>> a=myListSub()
> >>> a
> []
> >>> a+[5]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: 'str' object is not callable
> >>>
>
> Please could you let me know where I am going wrong.  I have hacked
> around with the code and tried googling this error message but am
> having difficulty finding the source of the problem.
>
> Many thanks
>
> Jon
>
> class myList:
>     def __init__ (self,value=[]):
>         self.wrapped=[]
>         for x in value :
>             self.wrapped.append(x)
>     def __repr__ (self):
>         return `self.wrapped`
>     def __getattr__ (self,attrib):
>         return getattr(self.wrapped,attrib,'attribute not found')
>     def __len__ (self):
>         return len(self.wrapped)
>     def __getitem__ (self,k):
>         return self.wrapped[k]
>     def __add__(self,other):
>         return self.wrapped+other
>
> class myListSub(myList):
>     classCounter=0
>     def __init__ (self,value=[]):
>         self.instanceCounter=0
>         myList.__init__(self,value)
>     def __add__(self,other):
>         myListSub.classCounter=myListSub.classCounter+1
>         self.instanceCounter=self.instanceCounter+1
>         myList.__add__(self,other)
>     def getCounters (self):
>         return "classCounter=%s instanceCounter=%s" %
> (myListSub.classCounter,self.classCounter)

I'm not sure what you're trying to achieve with the __getattr__ in
myList, but the reason your __add__ isn't working is that when "a +
[5]" is executed, Python tries to find a __coerce__ attribute (to prove
this just put a "print attrib" as the first line of your __getattr__).
Your customer __getattr__ returns a default string object of 'attribute
not found', when it fails to locate this. Python then attempts to call
this string, and as your exception states -- strings aren't callable.

That should give you enough information to be going onwith.

Also, if you're trying to get use to classes, I would suggest you start
off with the 'new-style' classes; those are the ones that derive from
object. A quick google for new-style classes will sort you.

hth a bit,

Jon.



From bearophileHUGS at lycos.com  Wed Nov  1 11:28:26 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Nov 2006 08:28:26 -0800
Subject: Style for modules with lots of constants
In-Reply-To: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
Message-ID: <1162398506.919161.145290@m7g2000cwm.googlegroups.com>

Neil Cerutti:
> scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
>    'WriteAppend', 0)

That "+" sign seems useless. A space looks enough to me. The functions
can accept case-agnostic strings and ignore spaces inside them.
Example:
('transcript textmode ', 'writeappend', 0)


> Parsing the combinable bitfield contants might be slowish, though.

I think you have to test if this is true for your situation. Management
of interned strings is probably fast enough (compared to the rest of
things done by the Python interpreter) for many purposes.

Bye,
bearophile



From z28quetzal at gmail.com  Wed Nov 22 13:37:46 2006
From: z28quetzal at gmail.com (JG)
Date: Wed, 22 Nov 2006 13:37:46 -0500
Subject: How to pass a boolean to a stored proc using Cx_Oracle?
Message-ID: <ek25dr$3q6$1@sea.gmane.org>

Hi,
I am using Python 2.4 and cx_Oracle.  I have a stored proc that takes two
arguments.  First is an NUMBER, second is a BOOLEAN.  How do you call that
stored procedure?

After properly extablishing a connection, I have something like this:

cursor = con.cursor()
cursor.callproc("testproc",[123,True])

The problem I have ran into is that I keep getting an error from Oracle
stating I don't have the variables defined in with the proper type.  I
changed to proc just to test it, so that it would take two numbers.  I was
able to make it run properly.

So, what is the trick to pass a boolean?

Thanks,
joe





From python.list at tim.thechases.com  Tue Nov 14 14:45:53 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 14 Nov 2006 13:45:53 -0600
Subject: Is python for me?
In-Reply-To: <1163530584.269684.214520@h48g2000cwc.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>	<mbmm24-48f.ln1@lairds.us>	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
	<1163530584.269684.214520@h48g2000cwc.googlegroups.com>
Message-ID: <455A1CF1.1000104@tim.thechases.com>

> By large I mean an application with intensive operations, such
> as a fancy GUI maybe a couple of threads, accessing a
> database, etc.

I can't say I've had any python related problems on such matters.
  I've done some modestly large-sized apps, and the bottlenecks
are almost always I/O bound...disk, network, database (which is
regularly disk or network bound).  Some stuff has done some
fairly intense computation, and it's usually an algorithmic
problem, not a python problem (in my case, it was an O(n^2)
comparison of every element in one list with every element in
another list to find a "closest" string match to try and gently
merge two datasets on merely a person's ill-formatted name).

I'm not sure I'd write a hard-core nuclear-explosion simulator or
render intense 3d graphics within python.  But I'd readily use
python to glue together low-level optimized versions of libraries
such as OpenGL where performance counts...

-tkc






From donn at u.washington.edu  Thu Nov 30 12:59:54 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 30 Nov 2006 09:59:54 -0800
Subject: Problem with imaplib (weird result if mailbox contains a %)
References: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>
	<1164727244.400677.36150@l12g2000cwl.googlegroups.com>
	<slrnemqfhg.al8.apardon@rcpc42.vub.ac.be>
	<1164803590.454993.141050@j72g2000cwa.googlegroups.com>
	<slrnemr1if.1ra.apardon@rcpc42.vub.ac.be>
Message-ID: <donn-657942.09595430112006@gnus01.u.washington.edu>

In article <slrnemr1if.1ra.apardon at rcpc42.vub.ac.be>,
 Antoon Pardon <apardon at forel.vub.ac.be> wrote:
...
> $ telnet machine.domain imap
> Trying xxx.xxx.xxx.xxx...
> Connected to machine.domain
> Escape character is '^]'.
> * OK maxi Cyrus IMAP4 v2.2.13 server ready
> 0001 LOGIN ... ....
> 0001 OK User logged in
> 0002 LIST "" user/cpapen/*
> * LIST (\HasNoChildren) "/" "user/cpapen/Out"
> ...
> * LIST (\HasNoChildren) "/" "user/cpapen/music &- beats"
> * LIST (\HasNoChildren) "/" {25}
> user/cpapen/newsletters %
> * LIST (\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"
> * LIST (\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"


{5}\r\nhello\r\n is an IMAP "literal".  It's unlucky that
Cyrus uses this for some LIST responses and not others, since
that will be a surprise to clients that use ad hoc parsing -
like imaplib users.

   Donn Cave, donn at u.washington.edu


From davigoli at gmail.com  Sun Nov  5 03:22:05 2006
From: davigoli at gmail.com (David)
Date: 5 Nov 2006 00:22:05 -0800
Subject: python to sharepoint ?
References: <1162657536.386483.191300@h54g2000cwb.googlegroups.com>
Message-ID: <1162714925.852777.108210@e3g2000cwe.googlegroups.com>

You might want to check out IronPython:

http://www.codeplex.com/Wiki/View.aspx?ProjectName=IronPython

It's a port of the .NET FW for Python, which probably exposes the API
you'll need.

-David


curtin wrote:
> anyone have code that allows me to post files direct to sharepoint from
> python?
> 
> any pointers, FAQ, etc,  appreciated!
> 
> thanks,
> 
> craig



From paddy3118 at netscape.net  Fri Nov  3 12:35:12 2006
From: paddy3118 at netscape.net (Paddy)
Date: 3 Nov 2006 09:35:12 -0800
Subject: Best way to have intermediate object description format
In-Reply-To: <1162539920.802607.202610@i42g2000cwa.googlegroups.com>
References: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
	<1162536668.321600.171650@h48g2000cwc.googlegroups.com>
	<1162539920.802607.202610@i42g2000cwa.googlegroups.com>
Message-ID: <1162575312.121770.27350@m7g2000cwm.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Thanks paddy, Since the original language from which I am translating
> does not support any of these formats, I will have to write one myself.
> So, which one is easy to write out in a C like environment.
>
> regards,
> Suresh
> Paddy wrote:
> > jm.suresh at no.spam.gmail.com wrote:
> > > Hi,
> > >  Is there any standard text format for storing data of object oriented
> > > nature.
> > >  The text file should be readable.
> > >
> > > That is, Is there any better way than having to write out a file like
> > > this from the original place and read it in python and process it.
> > >
> > > #----------------------------
> > > world = World(name='MyWorld')
> > > world.objects.append(Box(color='red'))
> > > world.objects.append(Circle(color='green'))
> > > world.someProp = "123"
> > > #-----------------------------
> > >
> > > Thanks.
> > > Suresh
> >
> > XML ?
> > YAML ?
> > JSON ?
> > ConfigParser module ?
> > CSV file ?
> > UML ?
> >
> > I'm finding it hard to be more specific, given your original post. so
> > just squirted some data formats that are supported by multiple
> > languages and can be used to transfer data between them.
> >
> > P.S. I don't know why I put XML first :-)
> > P.P.S. And UML seems to be about pretty diagrams rather than a textual
> > format, but no doubt, with the size of the companies behind it, there's
> > probably a textual format hidden in their too.
> >
> >
> > - Paddy.
 Could you write out the data as a series of python dicts to file
ending in .py?,

If it is hard to write out the data in the language you are coming from
then it might be easier to stick to a simple format like CSV (comma
separated value/tab separated value), and then put more smarts in the
Python reader to reconstruct your objects.

- Paddy.



From fredrik at pythonware.com  Mon Nov 13 17:01:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 23:01:05 +0100
Subject: Python app links in windows
In-Reply-To: <000001c7076d$5de84000$9f0bf70a@lasp.colorado.edu>
References: <4558DBEF.8010409@hobbshouse.org>
	<000001c7076d$5de84000$9f0bf70a@lasp.colorado.edu>
Message-ID: <ejapv1$otk$1@sea.gmane.org>

Bryce Bolton wrote:

> I want to click a link, which is assocated with a Python application in
> Windows, and have the contents of the link file passed to my program.  How
> is this done?

if you want to open a new thread, please don't do that by replying to a 
random existing post.

 > I don't know how.

sys.argv ?

</F>



From bj_666 at gmx.net  Fri Nov  3 16:35:31 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 03 Nov 2006 22:35:31 +0100
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
Message-ID: <pan.2006.11.03.21.35.31.26395@gmx.net>

In <454ba334$0$12110$88260bb3 at free.teranews.com>, tobiah wrote:

> What else is available for sharing complex structures
> with processes running programs that were written in
> other languages?

Corba?

Ciao,
	Marc 'BlackJack' Rintsch


From lycka at carmen.se  Fri Nov  3 10:28:12 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 03 Nov 2006 16:28:12 +0100
Subject: is mod_python borked?
In-Reply-To: <1162519586.681243.301550@h48g2000cwc.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
	<1162509979.221261.192440@m7g2000cwm.googlegroups.com>
	<1162519586.681243.301550@h48g2000cwc.googlegroups.com>
Message-ID: <eifn6c$jou$1@wake.carmen.se>

walterbyrd wrote:
> *sigh* maybe I'll just use php until the web-hosters catch up, if they
> ever do.

The first general availability release of Apache 2.0 (2.0.35) appeared
in April 2002. There are many ISPs. Perhaps you should limit yourself
to those who lag behind less than four years? I can understand that it
isn't always so easy. If you're approached by a client who has a web
site up and running on some backwards ISP, it might not be so easy to
get them to move their site or place parts of it on a separate server.

Hopefully, virtual server prices will continue to drop and become more
of a normal choice fairly soon.


From ironfroggy at gmail.com  Sun Nov 26 02:37:56 2006
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Sun, 26 Nov 2006 02:37:56 -0500
Subject: screen output problem
In-Reply-To: <1164497246.626735.254050@h54g2000cwb.googlegroups.com>
References: <1164497246.626735.254050@h54g2000cwb.googlegroups.com>
Message-ID: <76fd5acf0611252337v2522a518jf8f92d241906d84@mail.gmail.com>

On 25 Nov 2006 15:27:26 -0800, Ritesh Raj Sarraf <rrs at researchut.com> wrote:
> Hi,
>
> I have, for very long, been trying to find a consistent solution (which
> could work across major python platforms - Linux, Windows, Mac OS X)
> for the following problem.
>
> I have a function which downloads files from the web. I've made the
> function threaded. I'm trying to implement a progress bar for it which
> could work across all the platforms.
>
> The problem is that when the progress bar is displayed, all the threads
> overwrite the progress bar.
>
> I've thought of using curses but AFAIK curses is not available for
> Windows.
>
> Is there a generic way to accomplish the following:
>
> progress = "[===================]\n[=======================]"
> for x in range(5):
>     sys.stdout.write(progress + "\r")
>
> Basically, I want a way through which I want to display data on two
> lines and make sure that "\r" overwrites the two lines without putting
> a newline making sure that whatever library it uses is available across
> all major Python platforms.
>
> Thanks,
> Ritesh
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Take a look at this:
http://cheeseshop.python.org/pypi/progressbar

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From martin at v.loewis.de  Tue Nov  7 09:44:59 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Nov 2006 15:44:59 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7x3b8voehm.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
	<7x7iyafg85.fsf@ruckus.brouhaha.com> <454DC638.2050802@v.loewis.de>
	<7x3b8voehm.fsf@ruckus.brouhaha.com>
Message-ID: <45509BEB.4050301@v.loewis.de>

Paul Rubin schrieb:
> "Martin v. L?wis" <martin at v.loewis.de> writes:
>> Ah, but in the case where the lock# signal is used, it's known that
>> the data is not in the cache of the CPU performing the lock operation;
>> I believe it is also known that the data is not in the cache of any
>> other CPU. So the CPU performing the LOCK INC sequence just has
>> to perform two memory cycles. No cache coherency protocol runs
>> in that case.
> 
> How can any CPU know in advance that the data is not in the cache of
> some other CPU?

AFAIU, the lock# line, in P6, is only used for memory regions that
are marked non-cacheable. The CPU determines a memory region to be
non-cacheable if either the memory-type register (MTRR) says it's
non-cacheable, or if the not-cached bit in the page table is set.

If a certain location is known to be modified a lot from different
CPUs (e.g. a spin lock), it might be best if the operating system
sets the page where this location lives as non-cacheable - it might
be more performant to always modify it through the main memory,
than having cache coherence deal with it.

> OK, this is logical, but it already implies a cache miss, which costs
> many dozen (100?) cycles.  But this case may be uncommon, since one
> hops that cache misses are relatively rare.  

Right - I'm completely uncertain as to what the cost of a cache miss
is, in terms of internal cycles. E.g. how many memory cycles does
the CPU have to perform to fill a cache line? And what is the ratio
between memory cycles and CPU cycles?

> IIRC, the SPJ paper that I linked claims that lock-free protocols
> outperform traditional lock-based ones even with just two processors.
> But maybe things are better with a dual core processor (shared cache)
> than with two separate packages.

Likely, yes. Although different dual-core designs are out there, some
of them not using a shared cache, but two individual ones.

Regards,
Martin


From sjmachin at lexicon.net  Thu Nov 16 06:11:46 2006
From: sjmachin at lexicon.net (John Machin)
Date: 16 Nov 2006 03:11:46 -0800
Subject: split CSV fields
References: <ejhduq$l5l$1@news.albasani.net>
	<mailman.238.1163673019.32031.python-list@python.org>
	<1163674830.440318.246920@f16g2000cwb.googlegroups.com>
Message-ID: <1163675506.590469.251910@h48g2000cwc.googlegroups.com>

John Machin wrote:
> Fredrik Lundh wrote:
> > robert wrote:
> >
> > > What is a most simple expression for splitting a CSV line
> >  > with "-protected fields?
> > >
> > > s='"123","a,b,\"c\"",5.640'
> >
> > import csv
> >
> > the preferred way is to read the file using that module.  if you insist
> > on processing a single line, you can do
> >
> >      cols = list(csv.reader([string]))
> >
> > </F>
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> | >>> import csv
> | >>> s='"123","a,b,\"c\"",5.640'
> | >>> cols = list(csv.reader([s]))
> | >>> cols
> [['123', 'a,b,c""', '5.640']]
> # maybe we need a bit more:
> | >>> cols = list(csv.reader([s]))[0]
> | >>> cols
> ['123', 'a,b,c""', '5.640']
>
> I'd guess that the OP is expecting 'a,b,"c"' for the second field.
>
> Twiddling with the knobs doesn't appear to help:
>
> | >>> list(csv.reader([s], escapechar='\\'))[0]
> ['123', 'a,b,c""', '5.640']
> | >>> list(csv.reader([s], escapechar='\\', doublequote=False))[0]
> ['123', 'a,b,c""', '5.640']
>
> Looks like a bug to me; AFAICT from the docs, the last attempt should
> have worked.

Given Peter Otten's post, looks like
(1) there's a bug in the "fmtparam" mechanism -- it's ignoring the
escapechar in my first twiddle, which should give the same result as
Peter's.
(2)
| >>> csv.excel.doublequote
True
According to my reading of the docs:
"""
doublequote
Controls how instances of quotechar appearing inside a field should be
themselves be quoted. When True, the character is doubled. When False,
the escapechar is used as a prefix to the quotechar. It defaults to
True. 
"""
Peter's example should not have worked.



From newsuser at stacom-software.de  Wed Nov 15 12:21:46 2006
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Wed, 15 Nov 2006 18:21:46 +0100
Subject: Heap cleanup in python extension
Message-ID: <ejfiai$ivt$1@online.de>

Hello Together,

Shortly what I'm  doing:
- Extending python with boost.pthon extension
- Using python C-Api for datatypes in the extension
- extension has a thread (that can be stopped/started)
- thread started: extension updates a dict (given as parameter to the extension) 
every 20 ms
- the dict looks like:
{int:{int:[float,float,float] int:[float,float,float], ...}}

Now my question:
I create the dict every 20 ms on the heap in the following way:
------------------------------
static PyObject*  createPTDict()
{
	static int aNumIter = 0;

	PyObject* nRetDictPy =  PyDict_New(); // dicto to return
	PyObject* nToolIdPy = PyInt_FromLong(1234567);
	PyObject* nLedDict =  PyDict_New(); // dict containing 5 key,values
		
	for (int aLedNum=0; aLedNum < 5; aLedNum++)
	{
		PyObject* aLedNumPy = PyInt_FromLong(aLedNum);
		PyObject* aLedList = PyList_New(0);
		for ( int aXYZ=0; aXYZ < 3; aXYZ++)
		{
			PyObject* aLedPosXYZ = PyFloat_FromDouble(1.0);
			PyList_Append(aLedList, aLedPosXYZ);
		}
		PyDict_SetItem(nLedDict, aLedNumPy, aLedList);
	}
	PyDict_SetItem(nRetDictPy, nToolIdPy, nLedDict);
	aNumIter ++;
	return nRetDictPy;
}
------------------------------
I give it to python with:
------------------------------
PyObject *aKey, *aValue;
int aPos = 0;
PyObject* aNewToolDict = createPTDict();
PyDict_Next(aNewToolDict, &aPos, &aKey, &aValue);

// DictInPython passed prior to extension
PyDict_SetItem(<DictInPython>, aKey, aValue);
------------------------------
And now, what would be a proper way to cleanup the heap?
1) Does PyDict_Clear(aNewToolDict) also decrement the ref counting for the 
containing list, int, ... PyObjects?
2) Do I need to Py_CLEAR( PyObject *o) for every created PyObject?

Thanks a lot for every answer/hint.

Regards
Alexander


From jm.suresh at gmail.com  Mon Nov 13 04:34:09 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 13 Nov 2006 01:34:09 -0800
Subject: Data structure for ordered sequence
Message-ID: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>

Dear all,
 I am looking for a data structure to hold rectangles in a 2d space.
Please point me to any module which does these operations:
 Insert a rectangle into a particular co-ordinate.
 Get the rectangle/s right/left/above/below side to a particular
rectangle.
 Get all the rectangles within a box
 Delete a particular rectangle.

--
thanks.
Suresh



From gilbert3b2g at msn.com  Sat Nov 18 10:47:06 2006
From: gilbert3b2g at msn.com (jim)
Date: 18 Nov 2006 07:47:06 -0800
Subject: Free Decompiler
Message-ID: <1163864826.030264.306370@m73g2000cwd.googlegroups.com>

where can I find a free decompile that I can run in windows xp



From durumdara at gmail.com  Fri Nov 10 04:26:43 2006
From: durumdara at gmail.com (durumdara)
Date: Fri, 10 Nov 2006 10:26:43 +0100
Subject: Localization - set to default on Windows
Message-ID: <455445D3.9010805@gmail.com>

Hi !

I want to set default locale on WXP.
I want to create a formatting tool that can set up format locale in the 
init, and next the formatter functions are use these settings.
Example:

fmtunit:
-------

SetLocaleToDefault()

def ToUnicode(text,  encoding = None):
    ....
    if encoding == None:
       encoding = defaultencoding
    ...

This is my test code that have been failed in more point.

    import locale
    # Get default
    print locale.getdefaultlocale('LANG')
    # Get actual
    print locale.getlocale(locale.LC_ALL)
    # Get default to "loc"
    loc, enc = locale.getdefaultlocale('LANG')
    try:
        # Try to set
        locale.setlocale(locale.LC_ALL, loc)
    except Exception, msg:
        # An error
        print msg
    # Get actual
    print locale.getlocale(locale.LC_ALL)
    # Set manually
    locale.setlocale(locale.LC_ALL, "HU")
    # Get the actual locale
    print locale.getlocale(locale.LC_ALL)
    print locale.getdefaultlocale('LANG')

The result was:

     > Executing: C:\Program Files\ConTEXT\ConExec.exe
    "c:\python24\python" "c:\loc.py"

    ('hu_HU', 'cp1250')
    (None, None)
    unsupported locale setting
    (None, None)
    ('Hungarian_Hungary', '1250')
    ('hu_HU', 'cp1250')
     > Execution finished.

Two interesting thing I see:

   1. The default locale (hu_HU) is not correct parameter for setlocale.
      Why ? I want to determine and set up the locale automatically,
      with script !
   2. When I set locale with HU, then I cannot compare default locale
      with locale, to check it's state. These values are uncomparable:
      "HU", "hu_HU", "Hungarian_Hungary"...


Please help me: how to do this localization ?

Thanks for it:
    dd



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From vinjvinj at gmail.com  Fri Nov 17 15:16:29 2006
From: vinjvinj at gmail.com (vj)
Date: 17 Nov 2006 12:16:29 -0800
Subject: Anynoe have any examples on how to use python with paypal?
Message-ID: <1163794589.745670.255400@b28g2000cwb.googlegroups.com>

I looked all over the web and can't seem to find any examples. Surely
someone must be using python to access the paypal SDK. I found this
link for ruby  (which was helpful), but python code would be better:

http://www.jeremyhubert.com/2006/7/7/using-paypal-website-payments-pro-with-ruby-on-rails

Any examples would be greatly appreciated. 

VJ



From john106henry at hotmail.com  Thu Nov 16 19:40:49 2006
From: john106henry at hotmail.com (John Henry)
Date: 16 Nov 2006 16:40:49 -0800
Subject: How fuzzy is get_close_matches() in difflib?
Message-ID: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>

I am just wondering what's with get_close_matches() in difflib.  What's
the magic?   How fuzzy do I need to get in order to get a match?



From fredrik at pythonware.com  Fri Nov 17 10:25:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 16:25:02 +0100
Subject: How to pass an argument to a python program open in IDLE?
References: <ZMG6h.110$nx.65@lon04-news-philips><1163611493.817940.299130@f16g2000cwb.googlegroups.com>
	<1163772388.931433.129480@f16g2000cwb.googlegroups.com>
Message-ID: <ejkk8g$t6a$1@sea.gmane.org>

"TonyHa" wrote:

> My problem is this: When I start IDLE GUI, then I open my script with
> the edit window. (i.e.
> File -> open). I run my script under the edit window using run -> run
> module or F5. But IDLE does not allow me to input the argument to my
> script, i.e. IDLE runs without prompting for the argument, then my
> script fails. I wonder how can I pass the argument to my script under
> IDLE?

one would think that there would be a "set argument" command somewhere, but I
sure couldn't find it.

as a workaround, to help with testing, you can simply do:

    import sys

    if not sys.argv[1:]:
        sys.argv += ["argument1", "argument2", "argument3"]

at the top of your program.

</F> 





From ptmcg at austin.rr._bogus_.com  Thu Nov 23 04:14:06 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 23 Nov 2006 09:14:06 GMT
Subject: How do I find possible matches using regular expression?
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
Message-ID: <yDd9h.2553$Gk5.410@tornado.texas.rr.com>

"Andy" <icetortoise at gmail.com> wrote in message 
news:1164272307.978986.158810 at l39g2000cwd.googlegroups.com...
> Hi there,
>
> I'm trying to do some predicting work over user input, here's my
> question:
>
> for pattern r'match me', the string 'no' will definitely fail to match,
> but 'ma' still has a chance if user keep on inputting characters after
> 'ma', so how do I mark 'ma' as a possible match string?
>
> Thanks a lot,
>
> Andy
>
Maybe .startsWith might be more useful than re.match, since you are 
predicting user input based on characters that have been typed so far.

-- Paul 




From pavlovevidence at gmail.com  Mon Nov 20 07:08:21 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 20 Nov 2006 04:08:21 -0800
Subject: a few extensions for the itertools
In-Reply-To: <pan.2006.11.20.11.41.50.45063@REMOVE.THIS.cybersource.com.au>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.20.11.41.50.45063@REMOVE.THIS.cybersource.com.au>
Message-ID: <1164024501.194320.78010@h48g2000cwc.googlegroups.com>

Steven D'Aprano wrote:
> Worse, because comparing an iterator consumes items, you can easily get
> crazy results like the following:
[snip]

However, that doesn't stop the "in" operator:

>>> a = (x for x in xrange(5))
>>> 3 in a
True
>>> list(a)
[4]

I'm not sure if I like it, but at least it's probably a lot more useful
than icmp.

Carl Banks



From frank at chagford.com  Sat Nov 11 01:31:52 2006
From: frank at chagford.com (Frank Millman)
Date: 10 Nov 2006 22:31:52 -0800
Subject: Inheritance Question
In-Reply-To: <ej34k1$6oh$1@skeeter.ucdavis.edu>
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
Message-ID: <1163226712.585220.53550@f16g2000cwb.googlegroups.com>


Jackson wrote:
> I've got an inheritance question and was hoping brighter minds could
> guide me.  I am in the strange situation where some of the methods in a
> subclass are actually more general than methods in a superclass.  What
> is the preferred way to handle such situations.  My original thought was
> to do something like this:
>
> class AA(object):
> 	def general_method(): pass
>
> class A(AA):
>    # redefine general_method() to call a
>    # restricted version of AA.general_method()
>
> class B(A,AA):
>    # redefine general_method() to call AA.general_method()
>
> This seems ugly to me, and I am wondering if there is a better method.
> So any suggestions would be appreciated.
>

I don't have an answer, but I have a similar question, so I hope you
don't mind if I add it to this thread. Hopefully there will be some
commonality in the responses.

Continuing your analogy of animals, assume a class A with a 'walk'
method and an 'eat' method.

Most animals walk the same way, but a few don't, so I create a subclass
AW and override the walk method.

Most animals eat the same way, but a few don't, so I create a subclass
AE and override the eat method.

How do I create an instance of an animal that both walks and eats
differently?

This is how I do it at present.

class A(object):  # walks normally, eats normally
    def walk(self):
        normal walk
    def eat(self):
        normal eat

class AW(A):  # walks differently, eats normally
    def walk(self):
        different walk

class E(object):  # abstract class
    def eat(self):
        different eat

class AE(E,A):  #  walks normally, eats differently
    pass

class AWE(E,AW):  #  walks differently, eats differently
    pass

So I use multiple inheritance instead of subclassing to override the
eat method. It works, but it feels ugly. Is there a cleaner solution?

Thanks

Frank Millman



From orsenthil at gmail.com  Thu Nov 30 13:22:17 2006
From: orsenthil at gmail.com (Phoe6)
Date: 30 Nov 2006 10:22:17 -0800
Subject: Trying to understand rfc822.Message() behaviour
Message-ID: <1164910937.624693.315950@l12g2000cwl.googlegroups.com>

Hi all,
Have  a look at this snippet, I have a file direct.txt and I want to
read it as rfc8222.Message() so that I get the Subject: and Mood: as
Dict Keys and content separately, but I am unable to get the Content
Properly.

>>> fhandle = open('direct.txt','r')
>>> print fhandle.read()
Subject: testing - fortune
Mood: happy


  "Why should we subsidize intellectual curiosity?"
  - Ronald Reagan


>>> fhandle.seek(0)
>>> import rfc822
>>> message = rfc822.Message(fhandle)
>>> print message
Subject: testing - fortune
Mood: happy

>>>

What is happening here. Why is the message not coming up?

-- 
Senthil



From python.list at tim.thechases.com  Wed Nov 29 12:15:41 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 29 Nov 2006 11:15:41 -0600
Subject: How to detect what type a variable is?
In-Reply-To: <1164818738.403393.112900@j44g2000cwa.googlegroups.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<1164818738.403393.112900@j44g2000cwa.googlegroups.com>
Message-ID: <456DC03D.7040107@tim.thechases.com>

>> I want to know what type is a variable.
> 
> You should try to treat it as a list, catch the exceptions
> raise when it is a string (problably ValueError, TypeError ou
> Attribute error, depends on what are you doing), and then
> treat it as a string. This is the BAFP (better ask for
> forgiveness than permission) style


One might prefer to check for string-ness, as strings can 
duck-type somewhat like lists:

my_list = ['my', 'brain', 'hurts']
my_string = 'Are you the brain specialist?'

for test in [my_list, my_string]:
     try:
         for thing in test:
             process_list_item(thing)
     except Exception: #whatever flavor you want
         process_string(thing) # not called because
         #strings are iterable


This gives the potentially-surprising result of iterating over 
my_string and calling process_list_item() with each character in 
the string, rather than raising some exception and calling 
process_string().  Python does the right thing, but it can be 
confusing when the duck-typing syntax is identical for the two, 
despite a desire to treat them differently...perhaps a tree-like 
list of lists and strings such as HTML/XML structure.

-tkc





From no at spam.com  Wed Nov  1 14:40:30 2006
From: no at spam.com (Farshid Lashkari)
Date: Wed, 01 Nov 2006 11:40:30 -0800
Subject: Hooking file open
Message-ID: <QI62h.828$Hc2.442@newsfe11.phx>

Hi,

My goal is to detect all (or most) file dependencies of a script (i.e. 
modules, dlls, data files). Currently, after a script is finished 
executing I use sys.modules to determine all module dependencies, and I 
use win32process.EnumProcessModules to determine DLL dependencies. This 
works reasonably well, however I would still like to detect dependencies 
from regular file open calls.

I did a little test by modifying __builtins__.open to point to a custom 
function that forwards the call to the original open function and saves 
the filename to a list. It seemed to work for simple test cases. Here is 
the code:

def open_hook(*args,**kwargs):
     r = open_real(*args,**kwargs)
     saveFileName(args[0])
     return r

open_real = __builtins__.open
__builtins__.open = open_hook

Is this a safe approach? Is there a more efficient way of doing this? I 
realize that some dependencies will still fall through my checks, 
especially file opens from C extensions, which is fine. I just want to 
be able to detect the most common use cases. Any other suggestions are 
appreciated.

-Farshid


From no at spam.it  Thu Nov 30 08:29:14 2006
From: no at spam.it (Danny Scaleno)
Date: Thu, 30 Nov 2006 14:29:14 +0100
Subject: IEC Controller and <head> element
In-Reply-To: <456c92a1$0$3215$4fafbaef@reader2.news.tin.it>
References: <456c92a1$0$3215$4fafbaef@reader2.news.tin.it>
Message-ID: <456edc64$0$13751$4fafbaef@reader3.news.tin.it>

Maybe this help someone else.
The solution comes with old VB6. It's "COM Land" so
introspecting the VB WebBrowser Control object I found properties and 
methods to correctly access all parts of the python IEC.Document object 
returned by the IEC Controller

http://www.mayukhbose.com/python/IEC/index.php

Great library !
Danny

> using IEC Controller,
> anybody knows how to capture the head part of an html page like this one?
> 
> <html>
> <head>
> <script language='javascript'>
>     Object=window.open('test.html','test1','name="test1"');
>     Object.focus()
> </script>
> <head>
> <body></body>
> </html>
 > it seems IEC is able to capture only the <body> part.
 > I need to parse the string inside the tag <script>

 > Actually, IEC return the ie.Document object, but
 > how do I know which methods and properties are available for it ?


From inq1ltd at verizon.net  Thu Nov  2 10:20:31 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 02 Nov 2006 10:20:31 -0500
Subject: SE 2.3 temporarily unavailable. Cheese shop defeats upload with
	erratic behavior. Urgently requesting help.
In-Reply-To: <4549FA01.4090706@vtxmail.ch>
References: <4549FA01.4090706@vtxmail.ch>
Message-ID: <200611021020.31599.inq1ltd@verizon.net>


Frederic,

I've been trying to get back into my package in 
the Cheese Shop for over a year. The phone 
company changed my e:mail address and to make a 
long and frustrating story short I can't get back 
into the Cheese Shop to make changes to my file.

Time is money.  At some time you have to consider 
if it is worth it.  At least you have the name of 
your program listed.

I wish I could be more helpfull. I'll watch the 
responses you get from others.

Good Luck,
jim-on-linux

http://www.inqvista.com






On Thursday 02 November 2006 09:00, you wrote:
> Some time ago I had managed to upload a small
> package to the Cheese Shop using the data entry
> template. Uploading is in two steps: first the
> text then the package file. When I had a new
> version it went like this: The new text made a
> new page, but the new file went to the old
> page. The old page then had both files and all
> attempts at uploading the new file to the new
> page failed with the error message that a file
> could not be uploaded if it was already there.
> So I let it go and handed out the url of the
> old page, figuring that given the choice of two
> versions, picking the latest one was well
> within the capabilities of anyone. One
> downloader just now made me aware that the new
> version had misspelled extensions 'PY'. They
> should be lower case. So I fixed it an tried to
> exchange the file. One hour later I have three
> text pages, headed V2,2beta, V2,2beta/V2.3  and
> V2.3. The first (oldest) page has the old
> package file. The two other pages have no
> files. The new version package is gone,
> because, prior to re-uploading I was asked to
> delete it. The re-upload fails on all three
> pages with the message: 'Error processing form,
> invalid distribution file'. The file is a zip
> file made exactly the way I had made and
> uploaded the ones before. I am banging my real
> head against the proverbial wall. This thing
> definitely behaves erratically and I see no
> alternative other than to stop banging and go
> to the gym to take my anger out at machines and
> when I come back in an hour, I wish a kind,
> knowledgeable soul will have posted some good
> advice on how to vanquish such stubborn
> obstinacy. I have disseminated the url and the
> thought that someone might show up there and
> not find the promised goods make me really
> unhappy. Until such time as this upload is
> made, I will be happy to send SE-2.3 out off
> list by request.
>
> Infinite thanks
>
> Frederic


From NO_Kroeger at gmx.de  Sat Nov 25 12:01:31 2006
From: NO_Kroeger at gmx.de (=?GB2312?B?TmlscyBPbGl2ZXIgS3JvImdlcg==?=)
Date: Sat, 25 Nov 2006 18:01:31 +0100
Subject: Try to stop thread Using flag
In-Reply-To: <1164456728.261093.184820@h54g2000cwb.googlegroups.com>
References: <1164456728.261093.184820@h54g2000cwb.googlegroups.com>
Message-ID: <456876EB.6020809@gmx.de>

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

The Python documentation states:

[quote]
start(  	)
    Start the thread's activity.

    This must be called at most once per thread object. It arranges for
the object's run() method to be invoked in a separate thread of control.
[/quote]

So you cannot start() one Thread object a second time, you have to
create a new one. But as you don't move any thread out of your list in
the OnEndProcess function all stopped Thread objects are indeed
restarted by your OnBeginProcess as they are still in self.threadlist.

Furthermore: you should wait in our OnEndProcess function and check
whether all thread have ended indeed by calling Thread.join().
Otherwise some threads mights still be running indeed.

Hope I could make it clear.

Greetings

Nils
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Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org

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From mike at hobbshouse.org  Mon Nov 13 13:30:59 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 12:30:59 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej6erq$vkh$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>	<mailman.2105.1163279202.11739.python-list@python.org>	<ej5e69$j1q$1@news.albasani.net>	<ej5g0e$1jp$1@sea.gmane.org>	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org>
Message-ID: <4558B9E3.2040207@hobbshouse.org>

Ron Adam wrote:
> skip at pobox.com wrote:
>   
>>     >>>>> I'm not sure why '\'s are required to do multi-line before the colon.
>>     >>>> Special cases aren't special enough to break the rules.
>>     >>>> 
>>     >>>> Georg
>>     >>> A bit of a circular answer.
>>     >>> 
>>     >>> Why the rule? -> So not to break the rule?
>>     >> 
>>     >> You proposed to allow leaving off line continuation '\' only in the
>>     >> "if", "for" and "while" headers. This is a special case in my eyes.
>>
>>     Ron> I wasn't that specific and it was related to Michael's suggestion
>>     Ron> the colon wasn't needed. If the need for '\' was dropped in
>>     Ron> multi-line block headers, then the colon would be required for an
>>     Ron> obvious reason.
>>
>> But \ is used to continue all sorts of statements/expressions, e.g.:
>>
>>     x = a + \
>>           b
>>
>> not just conditionals.
>>
>> Skip
>>     
>
> Of course, and your point is?
>
> How about if it be ok to continue to use '\' in headers, but it also be ok to 
> not to?  That would be the backward compatible way to change it.
>
> This doesn't answer the question I was asking, are there any situation where it 
> would cause problems?  And if so, that reason would be a good and explicit 
> reason for not making such a change

To be clear, this is the actual thrust of my argument. It seems 
redundant to have *both* line continuations and colons in compound 
statements. I've been arguing for the removal of colons, though to be 
honest, I'd be content with the opposite approach as well.

- Mike



From steve at holdenweb.com  Fri Nov  3 22:54:41 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Nov 2006 03:54:41 +0000
Subject: Javascript is turning into Python?!
In-Reply-To: <7xr6wkt6a3.fsf@ruckus.brouhaha.com>
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>	<1162596267.518634.164170@h54g2000cwb.googlegroups.com>
	<7xr6wkt6a3.fsf@ruckus.brouhaha.com>
Message-ID: <eih2rp$2lf$2@sea.gmane.org>

Paul Rubin wrote:
> "Carl Banks" <pavlovevidence at gmail.com> writes:
> 
>>>http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7
>>
>>Maybe in exchange, Python can borrow the let statement.
> 
> 
> Maybe the with statement could be extended to allow binding more than
> one variable.  
>     with x as f(), y as g():
>        blah (x, y)

Wouldn't that be

     with f() as x, g() as y:
         blah(x, y)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From santoshrc at gmail.com  Mon Nov  6 07:58:25 2006
From: santoshrc at gmail.com (Santosh Chikkerur)
Date: Mon, 6 Nov 2006 18:28:25 +0530
Subject: Python-list Digest, Vol 38, Issue 72
In-Reply-To: <mailman.4743.1162810804.11738.python-list@python.org>
References: <mailman.4743.1162810804.11738.python-list@python.org>
Message-ID: <caa940d20611060458j7c5ae681l83a33c465810b165@mail.gmail.com>

Hi Friends,

How to use getchar( ) in python. I want to see the output of the program
,step by step.
I have given print statements in between for the results..
Hence i would like to print the output everytime there is getchar().which is
the
similar fn in python

thanks,
Santosh





On 11/6/06, python-list-request at python.org <python-list-request at python.org>
wrote:
>
> Send Python-list mailing list submissions to
>         python-list at python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>         http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
>         python-list-request at python.org
>
> You can reach the person managing the list at
>         python-list-owner at python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
>
>
> Today's Topics:
>
>    1. Re: Learning Python (Jorge Vargas)
>    2. Problem with XML-RPC not mounted in / (Almad)
>    3. Re: Python Distilled (Marc 'BlackJack' Rintsch)
>    4. Re: Creating db front end or middleware. (Bruno Desthuilliers)
>    5. Re: Python Distilled (Georg Brandl)
>    6. Re: Python Distilled (Jorge Godoy)
>    7. Re: simple way to un-nest (flatten?) list (Steven D'Aprano)
>    8. Re: Python Distilled (Paul McGuire)
>    9. RE: Classes referencing each other (Ryan Ginstrom)
>   10. Re: forwarding *arg parameter (Steven D'Aprano)
>   11. Re: Is there any python lib for calling CVS api? (Paul Boddie)
>
>
>
> ---------- Forwarded message ----------
> From: "Jorge Vargas" <jorge.vargas at gmail.com>
> To: ArdPy <ardsrk at gmail.com>
> Date: Mon, 6 Nov 2006 09:54:26 +0000
> Subject: Re: Learning Python
> On 6 Nov 2006 01:33:36 -0800, ArdPy <ardsrk at gmail.com> wrote:
> >
> > kaushal wrote:
> > > Hi
> > >
> > > How do i start Learning Python,is there any reference material which I
> > > can refer since I dont have
> > > any programming experience
> > >
> > > Thanks and Regards
> > >
> > > Kaushal
> >
> > Hi kaushal,
> >
> > Look into http://diveintopython.org. Dive into python is a really
> > readable ebook...enjoy
> >
> Even though that's a great book I don't recomend it for non
> programmers I think this http://docs.python.org/tut/ is a better way
> to start
>
> also I'll suggest you start learning other programming languaje before
> python or else this will be the only one you will code :)
>
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
>
>
> ---------- Forwarded message ----------
> From: "Almad" <bugs at almad.net>
> To: python-list at python.org
> Date: 6 Nov 2006 02:04:12 -0800
> Subject: Problem with XML-RPC not mounted in /
> Hi,
>
> I'm trying to build XML-RPC service, both server and client library.
>
> My server is CherryPy with XML-RPC filter. I have here method
> registration_ip. When it's in, say http://ws.rpgplanet.nerv/,
> everything is OK, but when I move it in http://ws.rpgplanet.nerv/main/,
> this behaviour occur:
>
> srv = ServerProxy('http://ws.rpgplanet.nerv/main/')
> print srv.register_ip("guest")
>
> raises 404, as according to log, library is trying to access /main/
> instead of /main/register_ip
>
> srv = ServerProxy('http://ws.rpgplanet.nerv/')
> print srv.main.register_ip("guest")
>
> raises 500, as client is correctly hitting /main/register_ip, but NOT
> sending "guest" argument.
>
> I'm probably missing something obvious, so where should problem be? Is
> it not possible for XML-RPC to live not in / ?
>
> Thank You for advices,
>
> Almad
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Marc 'BlackJack' Rintsch <bj_666 at gmx.net>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 11:11:41 +0100
> Subject: Re: Python Distilled
> In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
> wrote:
>
> > I'd also like to remove any deprecated or stuff which is left in for
> > backwards functionality (eg Classic classes).
>
> Classic classes are still needed for exceptions:
>
> >>> class E(object):
> ...    pass
> ...
> >>> raise E
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: exceptions must be classes, instances, or strings (deprecated),
> not type
>
> Ciao,
>         Marc 'BlackJack' Rintsch
>
>
>
>
> ---------- Forwarded message ----------
> From: Bruno Desthuilliers <onurb at xiludom.gro>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 11:19:47 +0100
> Subject: Re: Creating db front end or middleware.
> tobiah wrote:
> > Let's say I want to write a new tool to do
> > something to, or report on people in a database.
> > Each tool is going to have to have all sorts of
> > routines that know about the relationship between
> > the data.  The first thought is to write a library
> > of routines that do things like, change_address(),
> > or fire_employee() or whatever.
> > Whoops, now we've decided to move to python.  I
> > have to write all of that again.
> >
> > So I thought, shouldn't there be a cloud that sits
> > in front of the database to which I can ask these
> > services of?  Some process that awaits requests for
> > information, or handles new incoming data.  Now new
> > apps written in any language should be able to use a basic protocol in
> > order to get the work done.
> >
> > The question then, is what the best way to do this is.
>
> The first question then is: do you really need a middleware ? Most
> RDBMSs are already full-blown server applications - with support for
> authentification, permissions, triggers and stored procedures - that can
> be accessed by client programs in almost any language.
>
> Now if you effectively want/need a web service, it seems that the
> canonical solutions are XMLRPC and SOAP. But if you already use a RDBMS,
> this web service should IMHO mostly be designed as an higher-level
> interface to the RDBMS, not as a full-blown app managing domain/business
> rules (which is the job of the RDBMS). IOW, it should be still possible
> for applications to directly interact with the RDBMS.
>
> > First I thought of using cherrypy to sit and listen to
> > POST requests, but this would make passing complex structures
> > extremely inconvenient.
>
> There are XMLRPC packages for most languages, that knows how to do the
> native data structure <-> XMLRPC translation. Python has both client and
> server packages in the standard lib.
>
> >  Then I thought about WSDL.
> > Would this be the next logical step, or is this more for
> > allowing different companies to communicate with each other
> > when there needs to be a broadcast description of the interface?
>
> As the name implies, W(eb) S(ervice) D(escription) L(anguage) is meant
> to describe a given web service - and says nothing about implementation.
>
> My 2 cents
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"
>
>
>
>
> ---------- Forwarded message ----------
> From: Georg Brandl <g.brandl-nospam at gmx.net>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 11:26:11 +0100
> Subject: Re: Python Distilled
> Marc 'BlackJack' Rintsch wrote:
> > In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon
> Wittber
> > wrote:
> >
> >> I'd also like to remove any deprecated or stuff which is left in for
> >> backwards functionality (eg Classic classes).
> >
> > Classic classes are still needed for exceptions:
> >
> >>>> class E(object):
> > ...    pass
> > ...
> >>>> raise E
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: exceptions must be classes, instances, or strings
> (deprecated),
> > not type
>
> The error is a bit misleading, since in Python 2.5 all exceptions are
> new-style,
> but new exception classes must be derived from an existing one.
> Classic classes, their instances and strings are only allowed for
> backwards
> compatibility.
>
> Georg
>
>
>
>
> ---------- Forwarded message ----------
> From: Jorge Godoy <jgodoy at gmail.com>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 08:29:49 -0200
> Subject: Re: Python Distilled
> Marc 'BlackJack' Rintsch <bj_666 at gmx.net> writes:
>
> > In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon
> Wittber
> > wrote:
> >
> >> I'd also like to remove any deprecated or stuff which is left in for
> >> backwards functionality (eg Classic classes).
> >
> > Classic classes are still needed for exceptions:
> >
> >>>> class E(object):
> > ...    pass
> > ...
> >>>> raise E
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > TypeError: exceptions must be classes, instances, or strings
> (deprecated),
> > not type
>
> On the other hand...
>
> >>> import exceptions
> >>> class E(exceptions.Exception):
> ...     pass
> ...
> >>> raise E
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> __main__.E
> >>>
>
>
> This also has the advantage to let it explicit in the code that E is an
> exception.
>
>
> --
> Jorge Godoy      <jgodoy at gmail.com>
>
>
>
>
> ---------- Forwarded message ----------
> From: Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 21:43:13 +1100
> Subject: Re: simple way to un-nest (flatten?) list
> On Sun, 05 Nov 2006 21:43:33 +0000, djc wrote:
>
> > There is I am sure an easy way to do this, but I seem to be brain dead
> > tonight. So:
> >
> > I have a table such that I can do
> >
> >   [line for line  in table if line[7]=='JDOC']
> > and
> >   [line for line  in table if line[7]=='Aslib']
> > and
> >   [line for line  in table if line[7]=='ASLIB']
> > etc
> >
> > I also have a dictionary
> >   r=  {'a':('ASLIB','Aslib'),'j':('JDOC', 'jdoc')}
> > so I can extract values
> > r.values()
> > [('ASLIB', 'Aslib'), ('JDOC', 'jdoc')]
> >
> > I would like to do
> >
> > [line for line  in table if line[7] in ('JDOC','jdoc','Aslib','ASLIB')]
>
> What is the purpose of the "if line[7]" bit?
>
>
>
> > so how should I get from
> > {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> > to
> > ('Aslib','ASLIB','JDOC','jdoc')
>
>
> Assuming you don't care what order the strings are in:
>
> r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> result = sum(r.values(), ())
>
> If you do care about the order:
>
> r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> keys = r.keys()
> keys.sort()
> result = []
> for key in keys:
>     result.extend(r[key])
> result = tuple(result)
>
>
> --
> Steven.
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Paul McGuire" <ptmcg at austin.rr._bogus_.com>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 10:36:34 GMT
> Subject: Re: Python Distilled
> "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message
> news:pan.2006.11.06.10.11.35.335058 at gmx.net...
> > In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon
> Wittber
> > wrote:
> >
> >> I'd also like to remove any deprecated or stuff which is left in for
> >> backwards functionality (eg Classic classes).
> >
> > Classic classes are still needed for exceptions:
> >
> >>>> class E(object):
> > ...    pass
> > ...
> >>>> raise E
> > Traceback (most recent call last):
> >  File "<stdin>", line 1, in <module>
> > TypeError: exceptions must be classes, instances, or strings
> (deprecated),
> > not type
> >
> > Ciao,
> > Marc 'BlackJack' Rintsch
>
> I thought exceptions were converted to new-style classes for Py2.5
> (http://docs.python.org/whatsnew/pep-352.html).  I've not upgraded yet, so
> cannot easily test this - under what version of Python was your posted
> code
> run?
>
> -- Paul
>
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Ryan Ginstrom" <ginstrom at tree.odn.ne.jp>
> To: <python-list at python.org>
> Date: Mon, 6 Nov 2006 18:39:37 +0900
> Subject: RE: Classes referencing each other
> > Behalf Of Manuel Bleichner
> > In a module I have a huge number of classes of the form:
> >
> > class A(object):
> >    connected_to = [B, C]
> >    <other attributes...>
> >
> > class B(object)
> >    connected_to = [C]
> >    <other attributes...>
> >
> > class C(object)
> >    connected_to = [A]
> >    <other attributes...>
> >
> > As you see, classes A and B reference classes that are not
> > yet defined when the class is being defined.
> > It will raise a NameError: 'B'.
>
> How about a connection broker?
>
> Simple example:
>
> #############################
> connections = {}
>
> def Register( obj ):
>         try:
>                 connections[obj.name]['obj'] = obj
>         except KeyError:
>                 connections[obj.name] = { 'obj' : obj, 'connected_to' : []
> }
>
> def ConnectTo( objname, obj ):
>         try:
>                 connections[objname]['connected_to'].append( obj )
>         except KeyError:
>                 connections[objname] = { 'obj' : None, 'connected_to' :
> [obj] }
>
> class ConnectionObject:
>         def __str__(self):
>                 return self.name
>
> class A(ConnectionObject):
>     def __init__(self):
>         self.name = 'A'
>         Register( self )
>         ConnectTo( 'B', self )
>
>
> class B(ConnectionObject):
>     def __init__(self):
>         self.name = 'B'
>         Register( self )
>         ConnectTo( 'A', self )
>         ConnectTo( 'C', self )
>
>
> class C(ConnectionObject):
>     def __init__(self):
>         self.name = 'C'
>         Register( self )
>         ConnectTo( 'A', self )
>
>
> a = A()
> b = B()
> c = C()
>
>
> for (key, val) in connections.iteritems():
>     print 'object: %s (%s)' % ( key, val['obj'] )
>     str_vals = []
>     for obj in val['connected_to']:
>         str_vals.append( str( obj ) )
>     print '\tconnections from:', str_vals
>
> #############################
> Output:
>
> object: A (A)
>         connections from: ['B', 'C']
> object: C (C)
>         connections from: ['B']
> object: B (B)
>         connections from: ['A']
> object: D (None)
>         connections from: ['C']
>
> Regards,
> Ryan Ginstrom
>
>
>
>
>
> ---------- Forwarded message ----------
> From: Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au>
> To: python-list at python.org
> Date: Mon, 06 Nov 2006 22:00:28 +1100
> Subject: Re: forwarding *arg parameter
> On Sun, 05 Nov 2006 19:35:58 +0000, Tuomas wrote:
>
> > Thanks. My solution became:
> >
> >  >>> def flattern(arg):
> > ...     result = []
> > ...     for item in arg:
> > ...         if isinstance(item, (list, tuple)):
> > ...             result.extend(flattern(item))
> > ...         else:
> > ...             result.append(item)
> > ...     return tuple(result)
> > ...
> >  >>> def g(*arg):
> > ...     arg = flattern(arg)
> > ...     return arg
> > ...
> >  >>> def f(*arg):
> > ...     return g(arg)
> > ...
> >  >>> f('foo', 'bar')
> > ('foo', 'bar')
>
>
> That's the most complicated do-nothing function I've ever seen. Here is a
> shorter version:
>
> def shortf(*args):
>     return args
>
>
> >>> f('foo', 'bar')
> ('foo', 'bar')
> >>> shortf('foo', 'bar')
> ('foo', 'bar')
>
> >>> f(1,2,3,4)
> (1, 2, 3, 4)
> >>> shortf(1,2,3,4)
> (1, 2, 3, 4)
>
> >>> f({}, None, 1, -1.2, "hello world")
> ({}, None, 1, -1.2, 'hello world')
> >>> shortf({}, None, 1, -1.2, "hello world")
> ({}, None, 1, -1.2, 'hello world')
>
> Actually, they aren't *quite* identical: your function rips lists apart,
> which is probably not a good idea.
>
> >>> f("foo", [1,2,3], None) # three arguments turns into five
> ('foo', 1, 2, 3, None)
> >>> shortf("foo", [1,2,3], None) # three arguments stays three
> ('foo', [1, 2, 3], None)
>
>
>
> I still don't understand why you are doing this. Can we have an example of
> why you think you need to do this?
>
>
>
> --
> Steven.
>
>
>
>
>
> ---------- Forwarded message ----------
> From: "Paul Boddie" <paul at boddie.org.uk>
> To: python-list at python.org
> Date: 6 Nov 2006 02:55:09 -0800
> Subject: Re: Is there any python lib for calling CVS api?
> ironpythonster at gmail.com wrote:
> > Hi everyone, this should be a quick question.  I'm writing some scripts
> > to take some file and move them into a CVS repository, but it's pretty
> > slow, because it uses system calls to execute the CVS commands.
>
> [...]
>
> > anyway, if anyone knows of a useful module, I'd love to hear about it.
>
> You might get some ideas from ViewVC if you're accessing the repository
> directly:
>
> http://www.viewvc.org/
>
> There may be scripts out there which import data from various other
> revision control systems into CVS, although the focus these days seems
> to be on *exporting* data from CVS and putting it into things like
> Subversion, Bazaar, Mercurial and so on, but I believe the scripts for
> the latter two are Python programs and may also provide some
> inspiration.
>
> Paul
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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From no-spam at no-spam-no-spam.invalid  Wed Nov 29 13:20:19 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 29 Nov 2006 19:20:19 +0100
Subject: Detecting recursion loops
In-Reply-To: <1164815293.529674.109850@l39g2000cwd.googlegroups.com>
References: <ekk6qu$po0$1@news.albasani.net>
	<1164815293.529674.109850@l39g2000cwd.googlegroups.com>
Message-ID: <ekkj14$im2$2@news.albasani.net>

Carl Banks wrote:
> robert wrote:
>> My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
>> What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?
> 
> 
> 1. You could catch RuntimeError at the top, check whether it's
> recursion depth exception, and raise a user exception if it is.

thats what happens now anyway. need to limit this kind of recursion.

> 2. Consider whether you're unwittingly trying to cover up a bug.  ISTM
> no matter how problematic the input is, you should at least be able to
> make progress on it.  Are you getting this error because, say, you're
> not incrementing a counter somewhere, and thus recalling a function
> with the same arguments again?

the "bug" comes in from the I/O input. its about to stop it in non-simple recursion (through more functions calls)

> 3. Also consider whether you could rewrite the code to be
> non-recursive.  Usually when I process input recursively, the input is
> allowed to be arbitrarily deeply nested.  (In that case I think it
> would be a mistake to arbitrarily limit depth.)   But it sounds to me
> like your input might be inherently non-nestable.  If that's the case,
> it might be possible to get rid of the recursion altogether, or at
> least to put in error checking that detects when input is at an invalid
> depth.
> 
> 4. If those concerns don't apply, and you do need to detect recursion,
> I'd suggest using a global dictionary to track function calls.  If you
> have a function parse_something that you want to track, you could
> define a dict like this:
> 
> _call_count = { parse_something: 0 }
> 
> And change parse_something to adjust its own counter:
> 
> def parse_something():
>     _call_count[parse_something] += 1
>     check_invalid_recursion()
>     ....
>     _call_count[parse_something] -= 1
> 
> (You could define a decorator to do this more easily; that's left as an
> excercise.)
> 
> The check_invalid_recursion() function would inspect _call_count and
> raise an exception based on any criteria you want.

thats possibly the right practical/fast possibility, I end so far with. As its threaded, a try-finally protected counter on a TLS _func_recccount[thread.get_ident()]

> 5. In CPython, you could just inpect the stack frame and look for
> duplicated function calls.  See the documentation for sys._getframe.
> 
> 
> Carl Banks
> 


From egbert.bouwman at hccnet.nl  Wed Nov  8 13:54:33 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Wed, 8 Nov 2006 19:54:33 +0100
Subject: Dispatcher experiment
Message-ID: <20061108185433.GA19909@hccnet.nl>

As an exercise in the use of dispatcher 
I concocted a Zoo with some Animals, see below.
It works, but I think it is convoluted, obfuscated.

The idea is that in the Zoo each animal needs its own type of food,
and the Zoo should acknowledge a wish for that food,
as soon as the animal says it wants food.
The number and kind of animals (and their food) may vary.

The general problem is that you may have an unspecified number
of instances of some type, and that each instance must be recognized
and handled by the specific signal it sends into the world.

I would appeciate any comments or improvements on my design.
In a python shell you may test it with:
    import dip
    zoo = dip.Zoo()
    zoo.animals["fish"].send_food_wish()
    
egbert

#!/usr/bin/env python
# dip.py := experiment with Patrick O'Brien's dispatcher 

import wx.py.dispatcher as disp

class Animal(object):
    def __init__(self, animal_food):
        self.animal_food = animal_food
        
    def send_food_wish(self):
        # started by some event outside this class.
        disp.send(signal=self.animal_food, sender=self)

class Zoo(object):
    def __init__(self):
        # dummies for some gui that accepts names of animals and their food:
        animal_list  = ["bird",  "lion", "fish"]
        food_list    = ["bread", "meat", "plankton"]
        
        # zoo administration: register animals and their food;
        self.animals = {}
        for animal,food in zip(animal_list, food_list):
            animal_food_signal = (animal, food)
            self.animals[animal] = Animal(animal_food_signal)
            disp.connect(self.listen_to_food_wish, signal=animal_food_signal)
            
    def listen_to_food_wish(self, signal, sender=disp.Any):
        print "sender %s is %s and wishes to eat %s now" % \
              (sender, signal[0], signal[1])

if __name__ == '__main__':
    zoo = Zoo()
    for animal in zoo.animals.values():
        animal.send_food_wish()
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From eegunnar at yahoo.com  Thu Nov 23 23:07:11 2006
From: eegunnar at yahoo.com (erik gartz)
Date: 23 Nov 2006 20:07:11 -0800
Subject: beginner question about range with list and list
Message-ID: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>

Hello,
I'm new to python and I'm having difficulty understanding the following
code. Why doesn't the variable a contain  [[{}, {'x': 0}, {}], [{},
{'x': 1}, {}]] instead. Doesn't {} allocate new memory for the
dictionary each time? It almost appears as if the 2nd dictionary
created overwrites the first one. Thanks for your help,
Erik

>>>
>>> a = [[{}] *  3] * 2
>>> a
[[{}, {}, {}], [{}, {}, {}]]
>>> for i in range(2):
	a[i][1] = {'x':i}
>>> a
[[{}, {'x': 1}, {}], [{}, {'x': 1}, {}]]
>>>



From john.pye at gmail.com  Wed Nov 22 08:00:52 2006
From: john.pye at gmail.com (john.pye at gmail.com)
Date: 22 Nov 2006 05:00:52 -0800
Subject: Getting exceptions back from calls to embedded python
Message-ID: <1164200452.424657.168410@h48g2000cwc.googlegroups.com>

Hi all,

I have an application that is using embedded python to offer some
scripting ability. An API is exposed via SWIG, and I am accessing that
API from my embedded python interpreter.

Scripts are present as separate files, and I'm invoking them at present
using the following:

	iserr = PyRun_AnyFileEx(f,name,1);

	if(iserr){
		/* tell the user */
		return 1;
	}else{
		/* all good */
		return 0;
	}

My question is, if I want to be able to get information about
exceptions that have occurred here (perhaps a syntax error, or an
import error, or perhaps a runtime error), what would be the easiest
way to do this now?

I understand that I'm currently using the 'very high level interface'
for python embedding. What's the easiest next step down that will allow
me to catch exceptions and report them?

Would appreciate any thoughts.

Cheers
JP



From jameshcunningham at gmail.com  Thu Nov 16 07:57:48 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Thu, 16 Nov 2006 07:57:48 -0500
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
	<mailman.243.1163673962.32031.python-list@python.org>
Message-ID: <2006111607574875249-jameshcunningham@gmailcom>

On 2006-11-16 05:46:45 -0500, Steve Holden <steve at holdenweb.com> said:

> James Cunningham wrote:
>> On 2006-11-15 20:59:26 -0500, "walterbyrd" <walterbyrd at iname.com> said:
>> 
>>> Bruno Desthuilliers wrote:
>>>> walterbyrd a ?crit :
>>>> You mean there are web hosting companies that are still using Apache
>>>> 1.3.x ?
>>>> 
>>> Practically all web-hosters still use Apache 1.3.x. Certainly all of
>>> the lower priced hosters.
>> 
>> Not true. Dreamhost, at least, uses Apache 2.
> 
> So you thin a single counter-example disproves an assertion that begins 
> with "practically all"?

Nope. It disproves your assertion that "certainly all of the lower 
priced hosters" use Apache 1.3.

"Certainly all".

"Certainly" "all".

Best,
James



From brenNOSPAMbarn at NObrenSPAMbarn.net  Tue Nov 14 00:45:57 2006
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Tue, 14 Nov 2006 05:45:57 GMT
Subject: Unpacking sequences and keywords in one function call
References: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
	<nNmdnervt49hg8TYnZ2dnUVZ_rOdnZ2d@comcast.com>
	<mailman.114.1163473007.32031.python-list@python.org>
Message-ID: <Xns987ADD0FF21A8OKB@199.45.49.11>

Steve Holden wrote:

> Noah Rawlins wrote:
> You should be ok as long as you use the following ordering of
> actual arguments in a function call:
> 
>    1. Positional arguments
>    2. Keyword arguments
>    3. * sequence
>    4. ** dict

    	I was just wondering about this yesterday.  Is there a reason you 
can only unpack a sequence at the END of the positional argument list?

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From walterbyrd at iname.com  Wed Nov 15 10:46:37 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 07:46:37 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <1163605597.576368.243640@f16g2000cwb.googlegroups.com>


Larry Bates wrote:

> I'd be surprised if there was more demand for PHP developers
> than Python developers.

Prepare to be surprised. From what I have seen demand for PHP
developers is off-the-scale higher than demand for Python developers.

If you search the job boards, then -IMO- it is only fair to not include
jobs where the language is listed as an also-ran. For example a typical
sys-admin job will list about 24 skills, and python is often  thrown
into the landry list. To my way of thinking, that is not really an ad
for a python developer.

Trying to be as fair as I can be, my research shows that demand for
developers where PHP is the primary is *far* higher than jobs where
Python is the primary skills.

Of course, at best, that only shows the demand part of the equation.
There is also the supply side to consider. From what I have seen for
salary offers for PHP developers, it may be fair to say that PHP
developers are a dime a dozen.



From tom at t0mb.net  Sat Nov 18 17:45:56 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 22:45:56 +0000
Subject: print with variable justification (with *)
In-Reply-To: <1163889500.346015.214830@m73g2000cwd.googlegroups.com>
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>	<mailman.438.1163884150.32031.python-list@python.org>
	<1163889500.346015.214830@m73g2000cwd.googlegroups.com>
Message-ID: <455F8D24.3050800@t0mb.net>

John Machin wrote:
> tom wrote:
>   
>> Why Tea wrote:
>>     
>>> print format % values
>>> An optional minimum width of the conversion, specified using one or
>>> more digits or an asterisk (*), which means that the width is taken
>>> from the next item in values
>>>
>>> That's from one of O'reilly's books. But there is no example and I
>>> couldn't get it to work by trials and errors. Does anyone have a
>>> working example?
>>>
>>> /Why Tea
>>>
>>>
>>>       
>> value = 3.141592654
>> print "%1.3f" % value
>>     
>
> Please consider reading the subject of a message occasionally :)
>   

Sorry bout that !

> | >>> value = 3.141592654
> | >>> print "%1.3f" % value
> | 3.142
> | >>> print "%10.3f" % value
> |      3.142
> | >>> print "%*.3f" % (1, value)
> | 3.142
> | >>> print "%*.3f" % (10, value)
> |      3.142
> | >>> for n in range(11):
> | ...     print "%*.3f" % (n, value)
> | ...
> | 3.142
> | 3.142
> | 3.142
> | 3.142
> | 3.142
> | 3.142
> |  3.142
> |   3.142
> |    3.142
> |     3.142
> |      3.142
> | >>>
>   
>> there you go :)
>>     
>
> There *you* go :)
>
>   
>>  look at printf in c for general ideas about the format
>> specifiers
>>     
>
> Unfortunately this is about the same advice as given by the official
> Python tutorial:
>
> """Most formats work exactly as in C [snip] Using * to pass the width
> or precision in as a separate (integer) argument is supported"""
>
> Not quite so many folks come to Python with a background in C these
> days. Is anyone aware of a tutorial that covers % formatting from a
> standing start?
>
>   
If you're on a unix system you can probably do `man fprintf`, but it 
will mean wading through a lot of stuff you're no interested in.  This 
has a good little section on it though, specifically for python

http://rgruet.free.fr/PQR24/PQR2.4.html

> Cheers,
> John
>
>   



From timothy at open-networks.net  Thu Nov  9 02:07:46 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 09 Nov 2006 17:07:46 +1000
Subject: opening excel
Message-ID: <4552d34b$1@quokka.wn.com.au>

Hello,

has anybody got any experience opening and manilpulating excel 
spreedsheets via python? it seems pythoncom allows this to happen but 
i'm a total newb to it. (i usually work in the unix world)
all i need to do, is open the xls files and read values from it.


From sturlamolden at yahoo.no  Sat Nov 18 13:57:00 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Nov 2006 10:57:00 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163791069.178490.198740@j44g2000cwa.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163791069.178490.198740@j44g2000cwa.googlegroups.com>
Message-ID: <1163876220.121691.166740@h54g2000cwb.googlegroups.com>


Filip Wasilewski wrote:

> Actually you have not. The algorithm you presented gives completely
> wrong results. Have a look at quick&dirty(TM) implementation bellow.

God grief. I followed the implementation in Ingrid Daubechies' and Wim
Sweldens' original wavelet lifting paper  (J. Fourier Anal. Appl., 4:
247-269, 1998). If you look at the factorized polyphase matrix for D4
(which gives the inverse transform), their implementation of the
lifting steps the original paper is incorrect. That is scary.

A free PDF or PS of the paper is available here:

http://cm.bell-labs.com/who/wim/papers/factor/index.html



Thanks a lot!


Sturla Molden



From tleeuwenburg at gmail.com  Thu Nov 23 22:55:48 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 23 Nov 2006 19:55:48 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164340388.885058.264750@l12g2000cwl.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
Message-ID: <1164340548.689493.39050@j72g2000cwa.googlegroups.com>


> I thought I just had. In what way does the statement "Yes, it's true
> that you can't resell copies of The Python Papers for personal profits,
> but you may derive from it, reproduce and propagate it" not provide
> such a revision and clarification? Seriously, let me know what exact
> statement you feel needs to be made, and I will endorse it accordingly
> if it is accurate.
>
> For my part, I don't see that there are ethically serious restrictions
> on the freedom of use of the information contained within The Python
> Papers. Call it "mostly free" if you like. There's no such thing as
> complete freedom of information anyway, and we have done the best we
> can.
>
> It's not software. The GPL is not the only license which preserves the
> free use of the information containted within and I don't think there's
> any contradiction in what we are doing...
>
> We considered releasing under the GPL, but felt that we wanted to
> preserve two things which don't seem to be provided by it:
>   * Rights of the author to attribution as may be expected and desired
> of an academic publication. The GPL doesn't seem appropriate for
> disseminating the work of a single author.
>   * Rights of the author to have their words presented in their originial form
>   * Opportunity for the author to commercially license their works to
> other vendors. By choosing the Share Alike restriction, we have
> encouraged the free dissemination of research information without
> affecting its commercial use. It seemed to be the best middle ground
> between taking a strong ideological position on either side that would
> be bound to put people off side. It preserves some rights for the
> author while still allowing a substantial amount of free re-use.
>   * Reputation as an unbiased, financially disinterested group. By
> distributing under the license we chose, we hoped to establish our
> credentials.
>
> Your email indicates a possible concern that we are doing something
> untoward -- this was not at all intended, nor is it true.
>
> Cheers,
> -T
> (Editor-In-Chief)


Oh, and I should have gone back and revised that 'two' up to 'four'.
Snafu, sorry.

Cheers,
-T
(Only-Human EIC)



From frank at chagford.com  Wed Nov 29 00:53:52 2006
From: frank at chagford.com (Frank Millman)
Date: 28 Nov 2006 21:53:52 -0800
Subject: Question about import and sys.path
In-Reply-To: <1164725294.490337.224430@l12g2000cwl.googlegroups.com>
References: <1164700262.370760.129210@l12g2000cwl.googlegroups.com>
	<1164725294.490337.224430@l12g2000cwl.googlegroups.com>
Message-ID: <1164779632.560938.111260@l12g2000cwl.googlegroups.com>


Rob Wolfe wrote:
> Frank Millman wrote:
> > Hi all
> >
> > However, I want the ability to have duplicate program names stored in
> > different subdirectories. At the time of selecting the menu option I
> > know which company is active, so I know which directory I want to run
> > the program from, but there does not seem to be a way to tell 'import'
> > to import from a particular directory.
>
> I suggest to use module `imp`.
> For example:
>
> I assume paths like this:
>
> app/
>      importer.py
>      company1/
>          prog1.py
>
>
> the module in the company1 subdirectory:
>
> # prog1
> class SomeClass(object):
>     def test(self):
>         return "%s: %s" % (__file__, self.__class__.__name__)
>
> and the module with your menu could look like this:
>
> # importer.py
>
> def get_class(classname, impname, company):
>     fp, pathname, description = imp.find_module(impname, [company])
>     m = imp.load_module(impname, fp, pathname, description)
>     return getattr(m, classname)
>
> obj = get_class("SomeClass", "prog1", "company1")()
> print obj.test()
>

Perfect. Thanks very much, Rob.

One small point. The docs have the following warning -

"Important: the caller is responsible for closing the file argument, if
it was not None, even when an exception is raised. This is best done
using a try ... finally statement. "

I have added this to my code.

I wonder if you can avoid this in 2.5 by using the 'with' statement. I
am still using 2.4, so I cannot test. Anyway, your suggestion does
exactly what I want, and it works perfectly.

Thanks again.

Frank



From gmarkowsky at gmail.com  Tue Nov  7 09:35:14 2006
From: gmarkowsky at gmail.com (gmarkowsky at gmail.com)
Date: 7 Nov 2006 06:35:14 -0800
Subject: Simple Tkinter problem
Message-ID: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>

Hi all,

I'm trying to write a GUI that will put up multiple widgets in
succession. My problem is that each widget also contains the previous
widgets when they pop up. How do I reinitialize the widget each time so
that it doesn't contain earlier ones? Actually, another question I have
is, is there a way to set python so that it will assume any undefined
variable is 0 or ''? That is, I have several statements like "If k > 0
then so and so" and I would like it to assume k=0 unless I tell it
otherwise. I've just been defining k=0 at the start of the program but
it seems there should be a better way.

Greg



From dananrg at yahoo.com  Wed Nov  8 07:13:40 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 8 Nov 2006 04:13:40 -0800
Subject: More elegant way to obtain ACLs / permissions for windows
	directories than using "cacls" dos command?
In-Reply-To: <1162952479_41619@sp6iad.superfeed.net>
References: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>
	<1162952479_41619@sp6iad.superfeed.net>
Message-ID: <1162988020.060319.124030@b28g2000cwb.googlegroups.com>

Thanks Roger, I'll give it a shot.

Is os.walk the best way (using standard library modules) to traverse
directory trees in Python 2.4 and beyond?



From gagsl-py at yahoo.com.ar  Tue Nov  7 20:25:06 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 22:25:06 -0300
Subject: __init__ function problem
In-Reply-To: <1162946870.504386.302530@m7g2000cwm.googlegroups.com>
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
	<1162929803.735097.279460@i42g2000cwa.googlegroups.com>
	<1162946870.504386.302530@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107220904.05831438@yahoo.com.ar>

At Tuesday 7/11/2006 21:47, Jia Lu wrote:

> > In Python, the real constructor is called __new__, >
> > Carl Banks
>
>But the code below won't invoke __new__:

Is this a question, or just for making things more and more confusing 
to beginners?

>class Test:
>     def __new__(self, value):
>         print "__new__",value

For old-style classes __new__ is not used. On new-style classes it's 
used mostly for dealing with immutable objects. The code should be:

class NewStyle(object):
     "A new style class inherits from object in some way"
     def __new__(cls, value):
         print "NewStyle.__new__",value
         return super(NewStyle, cls).__new__(cls, value)
         # return object.__new__(cls, value) for lazy people

     def __init__(self, value):
         print "NewStyle.__init__",value

class OldStyle:
     "An old style class does not inherit from object"
     def __init__(self, value):
         print "OldStyle.__init__",value

n = NewStyle(1)
o = OldStyle(2)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From greenbergj at NOSPAMwit.edu  Mon Nov 27 01:47:32 2006
From: greenbergj at NOSPAMwit.edu (Jordan Greenberg)
Date: Mon, 27 Nov 2006 01:47:32 -0500
Subject: test message
In-Reply-To: <mailman.759.1164604111.32031.python-list@python.org>
References: <9fckm2p839oh7c586t93c9fn3lfppu43g3@4ax.com>	<456A5A1D.60309@NOSPAMwit.edu>
	<mailman.759.1164604111.32031.python-list@python.org>
Message-ID: <456A8A04.6090707@NOSPAMwit.edu>

Ben Finney wrote:
> Jordan Greenberg <greenbergj at NOSPAMwit.edu> writes:
> 
>> john.smith at nowhere.com wrote:
>>> This is a test message, please ignore.
>> I could do that, but reminding you that test messages go in *.test
>> groups is way more fun.
> 
> I'm betting that the test message was to the Python mailing list, not
> a Usenet group. Unlike for Usenet, where being able to send a message
> to one newsgroup is a strong indication that most others will also
> work, a test message to one mailing list says very little about
> ability to send messages to other mailing lists.
> 

Ahh. This is true, and I have been shamed for forgetting that
Python-list mirrors c.l.p. Apologies to the OP. Though also when posting
to a mailing list, IMHO, one can assume that it'll be received so long
as one's outgoing mail is functional, which can be tested without
actually mailing the list.

My bad,
Jordan

-- 
Posted via a free Usenet account from http://www.teranews.com



From email at christoph-haas.de  Fri Nov 24 05:28:20 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Fri, 24 Nov 2006 11:28:20 +0100
Subject: Pimping the 'cgi' module (was: Re: python gaining popularity
	according to a study)
In-Reply-To: <ek50ag$q3l$1@news.albasani.net>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<ek50ag$q3l$1@news.albasani.net>
Message-ID: <200611241128.21131.email@christoph-haas.de>

On Thursday 23 November 2006 21:29, robert wrote:
> When a LAMP programmer comes to Python, there are so many different
> confusing things. It starts with a 'non-documented' cgi module - a
> 'High-Level-Interface', that cannot even iterate over the form items. A
> name ZOPE in focus which reveals to be a monster system with 2-year
> learning-curve, ready for running an article editorial system for TOP-10
> newspaper companies, but unable to make simple things simple. A handful
> of different Djangos - choose one for each weekday and programmer ...
> And Ruby made it with this single-known simple URL-to-method-router (And
> possibly when coming from PHP & Perl one recognizes ::@$_$%??%/&... and
> the old namespace dirt) If there would have been a good cgi-system and a
> somewhat comfortable advanced URL-to-OO-router (beyond the socket
> wrapper HTTPServer) well exposed in the Python standard lib, the numbers
> would be probably very different today ...

I can fully second that. Coming from Perl and being used to the CGI module 
that is de-facto standard and already doing things much better than 
Python's equivalent my first thought was: "Does Python really expect me to 
re-invent the wheel to write basic CGIs?" So I started creating 
cookie-based session handlers, form field handling etc.

The reason of my posting it not only to complain though. My Python skills 
are average but I would really like to help contribute some code on this 
topic. I don't know Ruby-on-Rails myself but I have worked with CGIs for 
ten years both in C (yuk) and Perl (Perl=semi-yuk / Perl-CGI=yum) and 
think I know what people coming from Perl expect. And I'm not speaking of 
Zope or Django or huge frameworks. I try to avoid frameworks wherever I 
can (I want to write Python - not Zope or Django). I rather rely on the 
standard library unless it's really saving me time and worth learning 
another language. Are frameworks perhaps even telling that the standard 
library is still lacking in some way?

I'm thinking of features like:
- cookie handling
- cookie-session handling (similar to PHP or Perl's CGI::Session; combined
  with database backends or simple text files)
- handling of form fields (Perl's CGI class can easily redisplay what
  has been entered in the fields when they got submitted through a <FORM>)
- accessing parameters (honestly I haven't yet understood why I need to use
  .value on FielStorage dictionaries - why isn't it just a plain
  dictionary?)
- state keeping (storing the contents of all form fields on disk
  to retrieve it later)
- creating form elements easily (option lists for example from
  dictionaries and lists like in Perl)
- creating standard HTML elements (or do you remember how DOCTYPE
  looks without looking it up?)
- handling of file uploads (which is just a recipe on ActivePython
  at the moment)
- controlling HTTP headers (expires, redirections, charset)
- convenience functions e.g. for getting the client IP address without
  needing to read ENV['REMOTE_ADDR']

Well, of course there are modules like 'cgi' or 'cookielib' and others may 
argue that everything is already there. And there is a 'Web.py' already (I 
assume every CGI programmer has written their own Web.py already). But 
can't we come closer to what other scripting languages provide? Something 
common? Can't a simple form-based CGI just be a matter of a dozen lines? 
When it comes to CGIs Python loses its elegance for no reason.

I'm ready to invest work and ideas if anyone else is interested. Perhaps 
some day it makes it into the standard library or at least gives us 
something between the features of the standard library and huge framework 
monsters - something people can be pointed at when starting with Python 
and CGIs. I'll probably do that anyway because my web projects all use 
their own reinvented wheel and I'm losing the overview. And even Perl has 
come that route - it started with a cgi-lib.pl which later became 
the 'CGI' standard module.

Is it just a matter of lacking resources or interest? Even if there is no 
interest I'll probably read "man CGI" and "man CGI::Session" again and 
start implementing something nifty for ex-perlies like myself. Hmmm, 
batteries included even for CGI programmers, a man can dream. :)

Cheers
 Christoph


From Tim.Golden at viacom-outdoor.co.uk  Wed Nov 22 05:02:14 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 22 Nov 2006 10:02:14 -0000
Subject: file backup in windows
In-Reply-To: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B60C@vogbs009.gb.vo.local>

| " c:\documents and settings\060577\Local Settings\Application
| Data\Microsoft\Outlook "
| where 060577 represents username. I want my script to 
| identigy the user
| logged in and go to the resp outlook folder or should be able to read
| outlook store directory path from registry and the copy the files to
| the desired path.
| 
| ---------------------------------------------------
| how can i make the following code work, I have probelm with filepath
| declaration.
| ---------------------------------------------------
| import os, shutil
| filepath = ' C:\\Documents and Settings\\060577\\Local
| Settings\\Application Data\\Microsoft\\Outlook\\* '
| backup = ' D:\\temp\\outlook '
| os.system ("xcopy /s %s %s" % (filepath, backup))
| -----------------------------------------

I suggest you let the system work out most of the
filepath for you. Things like Application Data are
determined by the Windows Shell as they can change
according to Windows version / roaming profile settings
and so on. The following code snippet shows how to
get the Local Application Data folder. It assumes
you have installed the pywin32 extensions from 
http://pywin32.sf.net

<code>
import os, sys
from win32com.shell import shell, shellcon

local_app_data = shell.SHGetSpecialFolderPath (0,
shellcon.CSIDL_LOCAL_APPDATA)
outlook_path = os.path.join (local_app_data, "Microsoft", "Outlook")

print outlook_path

</code)

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
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From hg at nospam.com  Mon Nov 27 14:41:50 2006
From: hg at nospam.com (hg)
Date: Mon, 27 Nov 2006 13:41:50 -0600
Subject: pyxpcom
Message-ID: <QhHah.226$YX1.85@newsfe23.lga>

Hi,

Can one tell me what the status of this project is ?. I did google ...
but not much out there.

Regards,

hg


From g_gherdovich at yahoo.it  Sat Nov 11 07:23:30 2006
From: g_gherdovich at yahoo.it (giovanni gherdovich)
Date: Sat, 11 Nov 2006 13:23:30 +0100 (CET)
Subject: plasTeX doesn't load LaTeX packages
Message-ID: <20061111122330.4969.qmail@web27208.mail.ukl.yahoo.com>

Hello,

first of all:
Is this the right place to ask plastek-related
questions?

I'm trying to make plastex work on my Ubuntu Dapper
Drake. For LaTeX, I have the all-in-one package
tetex.

Everything is ok with this simple helloword code:

\documentclass{article}
\author{Au. Thor}
\title{Title}
\date{\today}
\begin{document}
\maketitle
Hello World!
\end{document}

but if I try to load any package, like in

\documentclass{article}
\usepackage{babel,a4,amsfonts,amsmath,amsthm,amssymb}
\author{Au. Thor}
\title{Title}
\date{\today}
\begin{document}
\maketitle
Hello World!
\end{document}

I got a lot of errors:

$ plastex helloworld.tex
plasTeX version 0.6
 (
/usr/lib/python2.4/site-packages/plasTeX/Packages/article.pyc
)
 ( /usr/share/texmf-tetex/tex/generic/babel/babel.sty
WARNING: Could not find any file named: b
 )
ERROR: Error while expanding "usepackage" in
/usr/share/texmf-
   tetex/tex/generic/babel/babel.sty on line 145
(Empty module name)
ERROR: Error while expanding "usepackage" in
/usr/share/texmf-
   tetex/tex/generic/babel/babel.sty on line 145
(Empty module name)
ERROR: An error occurred while building the document
object in /usr/share
   /texmf-tetex/tex/generic/babel/babel.sty on line
145 (Empty module name)
Traceback (most recent call last):
  File "/usr/bin/plastex", line 95, in ?
    main(sys.argv)
  File "/usr/bin/plastex", line 44, in main
    tex.parse()
  File
"/usr/lib/python2.4/site-packages/plasTeX/TeX.py",
line 376, in parse
    for item in tokens:
  File
"/usr/lib/python2.4/site-packages/plasTeX/TeX.py",
line 45, in next
    return self._next()
  File
"/usr/lib/python2.4/site-packages/plasTeX/TeX.py",
line 287, in __iter__
    tokens = obj.invoke(self)
  File
"/usr/lib/python2.4/site-packages/plasTeX/Base/LaTeX/Packages.py",
line 65, in invoke
    self.load(tex, file, a['options'])
  File
"/usr/lib/python2.4/site-packages/plasTeX/Base/LaTeX/Packages.py",
line 23, in load
    self.ownerDocument.context.loadPackage(tex,
file+self.extension, options)
  File
"/usr/lib/python2.4/site-packages/plasTeX/Context.py",
line 250, in loadPackage
    result = tex.loadPackage(file, options)
  File
"/usr/lib/python2.4/site-packages/plasTeX/TeX.py",
line 184, in loadPackage
    for tok in self:
  File
"/usr/lib/python2.4/site-packages/plasTeX/TeX.py",
line 287, in __iter__
    tokens = obj.invoke(self)
  File
"/usr/lib/python2.4/site-packages/plasTeX/Base/LaTeX/Packages.py",
line 65, in invoke
    self.load(tex, file, a['options'])
  File
"/usr/lib/python2.4/site-packages/plasTeX/Base/LaTeX/Packages.py",
line 23, in load
    self.ownerDocument.context.loadPackage(tex,
file+self.extension, options)
  File
"/usr/lib/python2.4/site-packages/plasTeX/Context.py",
line 229, in loadPackage
    m = __import__(module, globals(), locals())
ValueError: Empty module name

What is wrong?

Best regards,
Giovanni Gherdovich

__________________________________________________
Do You Yahoo!?
Poco spazio e tanto spam? Yahoo! Mail ti protegge dallo spam e ti da tanto spazio gratuito per i tuoi file e i messaggi 
http://mail.yahoo.it 


From breakfastea at gmail.com  Sat Nov 11 03:00:34 2006
From: breakfastea at gmail.com (Camellia)
Date: 11 Nov 2006 00:00:34 -0800
Subject: UnboundLocalError
In-Reply-To: <mailman.2085.1163229531.11739.python-list@python.org>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
	<1163223355.190176.127030@h48g2000cwc.googlegroups.com>
	<mailman.2085.1163229531.11739.python-list@python.org>
Message-ID: <1163232033.960671.290850@f16g2000cwb.googlegroups.com>

Oh how can I thank you enough, you make my day:)
According to what you said I finally figure it out, it is the same as:

<code>
b = 1
def a():
    b = b #no good:)
</code>

So in every day programming I should avoid using the same name for
different objects because they will step on each other, right?

On Nov 11, 6:18 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Saturday 11/11/2006 02:35, Camellia wrote:
>
> >But sorry I'm so dumb I can't say I really understand,
> >what do I actually do when I define a function with its name "number"?Don't apologize, Python is a lot more dumb than you. It obeys very
> simple rules (a good thing, so we can clearly understand them, once
> we know them).
> Recalling your previous example:
>
> > > >> def main():
> > > >>    number = number()Python first scans the source code looking for assigned-to names.
> That is, names to the left of equal signs. Those names, plus the
> function formal parameters, make the list of "local names". Any other
> names referenced are assumed to be globals, that is, living outside
> your function. (That's not entirely true but enough for now).
> Notice that "number" is a local name because it's assigned to; it
> doesn't matter whether a global name "number" exists or not.
> When the code is executed, the "number" to the right references the
> local name, which has not been assigned to yet - that's why you get
> an UnboundLocalError. "number" can't be a global name when used on
> the right hand side, and a local name when used on the left hand
> side. It's simple: it is local, or not, but not both.
>
> >why does a name of a function has something to do with a variable?Notice also that it does not matter *what* kind of object a name
> refers to: it may be a function, a class, an object instance,
> whatever. Inside a function, by example, a local name "a" may be
> bound at most to a single object at a time, it doesn't matter its
> type. A local name "a" can't refer to an integer and a class at the same time.
> The left hand side of an assign statement *always* uses local names,
> except when you declare a name to be global by using the "global" keyword.
> And notice also that I've never used the word variable.
>
> >Oh wait can I do this in Python?:
> ><code>
> >def a():
> >     def b()
> ></code>
>
> >so the b() will appear to be a local function which is the possible
> >cause of my little own error because the compiler will interpret the
> >number() as a local function but a global one?Yes, you can. Python has "lexically nested scopes". The simple
> local/global rule of above is a bit more complicated: when a name is
> not local, it is searched inside the enclosing functions, then in the
> containing module's global namespace, and last in the builtin names.
> And yes, b is local to a, so it effectively hides any external b that
> could be in outer scopes.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! -http://correo.yahoo.com.ar



From skip at pobox.com  Fri Nov 10 09:27:43 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 10 Nov 2006 08:27:43 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <slrnel915m.1r8.horpner@FIAD06.norwich.edu>
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
Message-ID: <17748.35935.368749.950252@montanaro.dyndns.org>


    Neil> The colon's main purpose seems to be to allow one-liners:

    Neil> Easy to parse: if a < b: a += 1
    Neil> Hard to parse if a < b a += 1

    Skip> ... the ABC language designers found that indentation-based block
    Skip> structure by itself wasn't enough to clue new users in about the
    Skip> code structure.  Adding the colon at the end of the if/while/for
    Skip> clause helped.

One final note.  Just because the colon isn't technically required in many
situations doesn't mean it's superfluous.  If all language designers cared
about was ease of parsing we'd probably all be programming in assembler,
sendmail, brainfuck.  Or, as the Zen of Python says: "Readability counts".

Skip

P.S.  I felt I just had to tie this into the thread on profanity somehow.
But notice that I didn't mention nazis or Hitler. ;-)

S




From paddy3118 at netscape.net  Fri Nov  3 17:31:11 2006
From: paddy3118 at netscape.net (Paddy)
Date: 3 Nov 2006 14:31:11 -0800
Subject: WSDL?
In-Reply-To: <454ba334$0$12110$88260bb3@free.teranews.com>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
Message-ID: <1162593071.051357.113370@m7g2000cwm.googlegroups.com>


tobiah wrote:
> Is WSDL the right answer for in house communication
> between programs written in different languages, or
> is it more for publishing interfaces for use by parties
> outside your own company?
>
> What else is available for sharing complex structures
> with processes running programs that were written in
> other languages?
>
> Thanks,
>
> Toby
>
> --
> Posted via a free Usenet account from http://www.teranews.com

What languages?
What OS's?
- Pad.



From scott.daniels at acm.org  Sun Nov 26 18:26:16 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 26 Nov 2006 15:26:16 -0800
Subject: Pending: A Mixin class for testing
Message-ID: <456a1929$1@nntp0.pdx.net>

Here is a Mix-in class I just built for testing.
It is quite simple, but illustrates how Mixins
can be used.

     class Pending(object):
         _pending = iter(())
         def __new__(class_, *args, **kwargs):
             try:
                 return class_._pending.next()
             except StopIteration:
                 return super(Pending, class_).__new__(class_,
                                                *args, **kwargs)

Now for the use:

     class Float(Pending, float): pass

     Float._pending = iter(range(4,7))

     print [Float(x*(x+1)//2) for x in range(6)]

Possibly by using itertools functions such as chain as in:
     Klass._pending = itertools.chain(generate_some(), Klass._pending)
you can inject fixed values to simplify testing.

Or something like this:

      class SomeTrickyClass(...):  # new-style only (derived from object)
          ...

      class Hacked(Pending, SomeTrickyClass):
          _pending = sample_value_generator()

      TempHold, SomeTrickyClass = SomeTrickyClass, Hacked
      try:
          <do the test>
      finally:
          SomeTrickyClass = TempHold


--Scott David Daniels
scott.daniels at acm.org


From naima.mans at gmail.com  Thu Nov  9 04:11:19 2006
From: naima.mans at gmail.com (naima.mans at gmail.com)
Date: 9 Nov 2006 01:11:19 -0800
Subject: Python cgi Apache os.system()
In-Reply-To: <eiu3qa$hte$1@enyo.uwa.edu.au>
References: <1162992302.834406.24550@f16g2000cwb.googlegroups.com>
	<eiu3qa$hte$1@enyo.uwa.edu.au>
Message-ID: <1163063479.546002.40350@b28g2000cwb.googlegroups.com>

Hello

thanks for your help..

it was a problem of path as you mentionned... my command was "O:\\....
ccm start" and i have change it with the path of the drive O

thanks a lot
 have a good day

Tachi



From Wolfram at invalid.invalid  Tue Nov 28 11:23:19 2006
From: Wolfram at invalid.invalid (Wolfram)
Date: Tue, 28 Nov 2006 17:23:19 +0100
Subject: Error handling. Python embedded into a C++ app.
Message-ID: <0eoom290nb1m69n36gr97dsm0bn74ora5o@4ax.com>

I have a problem with displaying errors in an embedded situation.

The "main program" I want to embed Python into is a windows, MFC,
non-console, C++ application. My issue is that I have not been able to
"catch" error messages from python, for example syntax errors. 

PyRun_SimpleFile() crashed, probably due to incompatible FILE
structures. So I am using PyRun_SimpleString to call the python
"execute" command to execute a *.py file. As a test for stdout I can
do a "print" in the *.py and I test stderr using an on-purpose name
error.


Here is what I tried:

- Use AllocConsole and 
	freopen("CON", "w", stdout);
  freopen("CON", "w", stderr);
to redirect stderr and stdout to a new console window.
The C++ stderr/stdout is successfully redirected before I start python
with  Py_Initialize(), but Python does not output into it at all. In
case it is a "not flushed yet" issue, I even added a Py_Finalize()
afetr executing the *.py file.
- I used a TKInter based solution found on the net
- I reopened stderr and stdout in C++ to a file. It always stays at 0
bytes.
- I tried to reset stderr in the python code (sorry, forgot details).

What is the best way to access Python error messages?
I prefer a C++ to a python way as I currently can debug C++ but not
python.
Is there one way I can use to "catch" exceptions, "runtime errors" and
"syntax errors" in case there is a difference between them? Sorry for
the newbie questions but neither a look into my Python-book nor onto
google helped.

Bye bye,
Wolfram Kuss.


From kevin.dahlhausen at gmail.com  Wed Nov  1 08:39:31 2006
From: kevin.dahlhausen at gmail.com (kpd)
Date: 1 Nov 2006 05:39:31 -0800
Subject: Remote Objects via CGI?
Message-ID: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>

Three are lots of good looking remote-object implementations for Python
such as Pyro, Rpyc, and PyInvoke.    All of these require a deamon
running to serve the remote objects.

Has anyone seen a method of doing this using CGI or FastCGI instead of
a deamon?   I'm not worried about performance for this application, but
I do have constraints on long-running processes.

I do want to stay away from XmlRpc if possible.

Do you have any suggestions?



From Mythmon at gmail.com  Sat Nov 11 19:48:06 2006
From: Mythmon at gmail.com (Mythmon at gmail.com)
Date: 11 Nov 2006 16:48:06 -0800
Subject: Why does this code crash python?
In-Reply-To: <eYs5h.5470$L6.744@newsread3.news.pas.earthlink.net>
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<eYs5h.5470$L6.744@newsread3.news.pas.earthlink.net>
Message-ID: <1163292486.423157.316390@m7g2000cwm.googlegroups.com>



On Nov 11, 3:23 pm, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> I have no knowledge of Console, but under Windows I was able to hack
> this (see bottom of post) together using only one non-portable library
> -- msvcrt. Oh, and an ActiveState 2.4 build. I'm not touching 2.5 until
> a lot of 3rd party stuff is rebuilt and installers are available.
>

And here I am thinking this was going to be an easy project. I haven't
had a chance to work on this since my last message, but that example
should be a good thing, since now i have an example of how threads
/should/ be done. I was pretty much just guessing so far.

>
> >             newTime = time.time()
> >             timeLeft[turn] -= newTime - oldTime[turn]        I'd duplicated this form, but it is wrong... when the clock swaps it
> will immediately decrement the current clock by the difference since it
> was last updated!
>
> >             if float(seconds[0]) < 10: seconds[0] = '0' +
> > seconds[0][:-1]
> >             if float(seconds[1]) < 10: seconds[1] = '0' +
> > seconds[1][:-1]        I've not handled leading 0s on the seconds field (I tried, but can't
> figure out how to specify zero-filled field width for floats -- works
> for integers)
>

I ran into the same problem, thats why I did it the way I did, instead
of continuing to wrestle with python's string formatting.

> >         go = True
> >         while go:        Why define "go" when it never changes

Whenever I make infinite loops, I put in a control variable so I could
stop it if I want, which I was planning on doing, when the time runs
out or something like that.


>
>         Note that I lock access to timeLeft and side to ensure they don't
> change in the middle of access; may not have been critical, but why risk
> it (and if the code gets expanded so the changes take more time -- or
> multiple look-ups using side).
>
>         getch() doesn't seem to return a value for <ctrl-c>, so I used
> <ctrl-z>
>
>         Uh, it also updates the time with an invalid negative before it
> exits <G>

Now to see if I can get this to work for my self with an example. This
is more a learning project than something that has to be done.



From e0427417 at student.tuwien.ac.at  Mon Nov 20 03:50:28 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 09:50:28 +0100
Subject: a few extensions for the itertools
In-Reply-To: <Xns988155A19F30duncanbooth@127.0.0.1>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<Xns988155A19F30duncanbooth@127.0.0.1>
Message-ID: <45616bf6$0$12642$3b214f66@tunews.univie.ac.at>

Duncan Booth wrote:
> Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> wrote:
> 
>> take(n,iterable) -> iterator
>>      returns a iterator over the first n
>>      elements of the iterator
> 
> Isn't this just the same as itertools.islice(iterable, n) ?
> 

ok, that's true.

>> drop(n,iterable) -> iterable
>>      drops the first n elemetns of iterable and
>>      return a iterator over the rest
> 
> and this looks to be the same as itertools.islice(iterable, n, None)
> 

same here.

> Can you give use cases for 'heads' and 'tails'? I'm curious why you would 
> want them.

I use them in haskell all the time. But in haskell the lists are all "generators".

In haskell you would implement naive string-search like this:

import List
findIndex (isPrefixOf "bla") (tails "dfvbdbblaesre")


From tomas at fancy.org  Wed Nov 29 16:09:29 2006
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 29 Nov 2006 13:09:29 -0800
Subject: type(foo) == function ?
References: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
	<V5qdnXzkk976cPDYnZ2dnUVZ_uadnZ2d@speakeasy.net>
Message-ID: <l1trm21pku7nc60nu1mh7cbopddp6osoet@4ax.com>

Erik Max Francis wrote:

> In dynamically-typed languages in general, explicit typechecks are not 
> a good idea, since they often preclude user-defined objects from being 
> used.  Instead, try performing the call and catch the resulting 
> TypeError:

Good point, although I need to figure out if the thing can be called
without calling it, so I can build an appropriate UI.  Basically I
expect three types of things in the 'value' field of the top-level
dictionary.  The three sorts of things that I will deal with in the UI
are callable things (e.g. functions, for which Chris Mellon reminds me
about callable()), mappings (e.g. dictionaries, used similarly to the
top-level one), and sequences of strings.

So I think callable() works for me in the general case, but now
trawling the documentation in that area I'm not sure how I can tell if
something is a mapping or if it's a sequence.

The gist of the UI generation may be envisioned as:

key is the name that gets assigned to the control.
value indicates that the UI element is a:
   "group box" if the value is a mapping
   series of "radio buttons" if the value is a sequence of strings
   "check box" if the value is a function

...I've still gotta figure out the exact API, this is for a plugin
sort of system that'll be used by the manually-driven version of the
build process and this data is explicitly to build the UI for the
various tools that are available.

thanks,
-tom!


From http  Sat Nov 25 16:03:25 2006
From: http (Paul Rubin)
Date: 25 Nov 2006 13:03:25 -0800
Subject: my small hashlib - using pythons hash-functions
References: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>
Message-ID: <7x7ixjp7c2.fsf@ruckus.brouhaha.com>

Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> writes:
> So, can this code be considered as derived and do I have to put my
> code under the GPL? I'd like to publish it under something less
> restrictive, like a BSD style license. But if GPL is the only way,
> then GPL it is. :)

Python is not GPL'd but has its own license.  You can make the derived
work GPL if you want, but it is not required.  You'll have to check
its terms to see whether you can specifically use the BSD license.
Simplest might be to just stay with the Python license.


From lbrooks at MIT.EDU  Sun Nov  5 12:36:08 2006
From: lbrooks at MIT.EDU (Lane Brooks)
Date: Sun, 05 Nov 2006 12:36:08 -0500
Subject: python bindings
Message-ID: <454E2108.1050703@mit.edu>

I have a header file and archive file for a C-api that I would like to
interface via python.  I tried using SWIG, but I get the error message
to compile the object files with the -fPIC option.  Since I do not have
the source code, I cannot recompile.

Can anyone suggest a way to get this C-api into python?

Thanks,
Lane Brooks



From no-spam at no-spam-no-spam.invalid  Fri Nov 17 11:06:45 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 17 Nov 2006 17:06:45 +0100
Subject: numpy magic: cast scalar returns auto to python types float &
	int   ?
In-Reply-To: <mailman.337.1163769761.32031.python-list@python.org>
References: <ejk69e$2g1$1@news.albasani.net>
	<mailman.337.1163769761.32031.python-list@python.org>
Message-ID: <ejkmmp$p6$1@news.albasani.net>

Tim Hochberg wrote:
> robert wrote:
>> To avoid this you'd need a type cast in Python code everywhere you get 
>> scalars from numpy into a python variable. Error prone task. Or 
>> check/re-render your whole object tree.
>> Wouldn't it be much better if numpy would return Python scalars for 
>> float64 (maybe even for float32) and int32, int64 ... where possible? 
>> (as numarray and Numeric did)
>> I suppose numpy knows internally very quickly how to cast. 
> 
> The short answer is no, it would not be better. There are some trade 
> offs involved here, but overall, always returning numpy scalars is a 
> significant improvement over returning Python scalars some of the time. 
> Which is why numpy does it that way now; it was a conscious choice, it 
> didn't just happen.  Please search the archives of numpy-discussion for 
> previous discussions of this and if that is not enlightening enough 
> please ask at on the numpy-discussion list (the address of which just 
> changed and I don't have it handy, but I'm sure you can find it).

Didn't find the relevant reasoning within time. Yet guess the reason is isolated-module-centric. 
All further computations in python are much slower and I cannot even see a speed increase when (rare case) puting a numpy-ic scalar back into a numpy array:

>>> a=array([1.,0,0,0,0])
>>> f=1.0
>>> fn=a[0]
>>> type(fn)
<type 'numpy.float64'>
>>> timeit.Timer("f+f",glbls=globals()).timeit(10000)
0.0048265910890909324
>>> timeit.Timer("f+f",glbls=globals()).timeit(100000)
0.045992158221226376
>>> timeit.Timer("fn+fn",glbls=globals()).timeit(100000)
0.14901307289054877
>>> timeit.Timer("a[1]=f",glbls=globals()).timeit(100000)
0.060825607723899111
>>> timeit.Timer("a[1]=fn",glbls=globals()).timeit(100000)
0.059519575812004177
>>> timeit.Timer("x=a[0]",glbls=globals()).timeit(100000)
0.12302317752676117
>>> timeit.Timer("x=float(a[0])",glbls=globals()).timeit(100000)
0.31556273213496411

creation of numpy scalar objects seems not be cheap/advantagous anyway:

>>> oa=array([1.0,1.0,1.0,1.0,1],numpy.object)
>>> oa
array([1.0, 1.0, 1.0, 1.0, 1], dtype=object)
>>> timeit.Timer("x=a[0]",glbls=globals()).timeit(100000)
0.12025438987348025
>>> timeit.Timer("x=oa[0]",glbls=globals()).timeit(100000)
0.050609225474090636
>>> timeit.Timer("a+a",glbls=globals()).timeit(100000)
1.3081539692893784
>>> timeit.Timer("oa+oa",glbls=globals()).timeit(100000)
1.5201345422392478

> For your particular issue, you might try tweaking pickle to convert 
> int64 objects to int objects. Assuming of course that you have enough of 
> these to matter, otherwise, I suggest just leaving things alone.

( int64've not had so far don't know whats with python L's )

the main problem is with hundreds of all-day normal floats (now numpy.float64) and ints (numpy.int32) variables.
Speed issues, memory consumption... And a pickled tree cannot be read by an app which has not numpy available. and the pickles are very big.

I still really wonder how all this observations and the things which I can imagine so far can sum up to an overall advantage for letting numpy.float64 & numpy.int32 scalars out by default - and also possibly not for numpy.float32 which has somewhat importance in practice ?
Letting out nan and inf.. objects and offering an explicit type case is of course ok.

Robert


From bblais at bryant.edu  Thu Nov  2 08:51:14 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 02 Nov 2006 08:51:14 -0500
Subject: idle with ipython
Message-ID: <4549F7D2.6040002@bryant.edu>

Hello,

I was wondering if there is a way to configure idle to call ipython instead of 
python?  I am working with the Enthought edition of Python (Enthon 1.0.0).  I use 
ipython in Linux all the time, but in windows I like the "Run Module" button in Idle, 
and would like to have both.

thanks,


		Brian Blais

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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From fredrik at pythonware.com  Fri Nov  3 06:38:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Nov 2006 12:38:26 +0100
Subject: refcounting errors???
References: <1162491997.320068.243850@h48g2000cwc.googlegroups.com>
Message-ID: <eif9nj$d7r$1@sea.gmane.org>

hannibal.holm at gmail.com wrote:


> The invokation of the foo-function goes somewhere in the line of:
>
>            PyObject *up = PyBool_FromLong(1L);
>            if (! up) PyErr_Print();
>
>            PyObject *res = PyObject_CallFunction(action.u.button.u.s,
> "(NIH)",

what happens if you use "(OIH)" instead ?

</F> 





From Thomas.Ploch at gmx.net  Mon Nov 20 18:24:39 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 21 Nov 2006 00:24:39 +0100
Subject: whats wrong with my python?
Message-ID: <45623937.5080309@gmx.net>



Hello,

I am having all sorts of troubles concerning my python install(s) (all
of them 2.3, 2.4, 2.5). Python itself actually works fine, but whatever
extensions I want to add, or build anything that requires python (like
apache's mod_python) I always get the following error:


[snip whatever I tried to built]
ld: Undefined symbols:
_fstatvfs referenced from Python expected to be defined in libSystem
_lchown referenced from Python expected to be defined in libSystem
_statvfs referenced from Python expected to be defined in libSystem
[snip error from whatever built it was]

What can I do about that? I think it has something to do with
dynamic/static python libraries, but my knowledge is not profound enough
(wether UNIX or python) to solve this.

Oh, I am running on an iBook G4 with MAC OS X 10.3.9

Any help would be much appreciated!

Thomas



From j1o1h1n at gmail.com  Tue Nov 21 09:34:32 2006
From: j1o1h1n at gmail.com (j1o1h1n at gmail.com)
Date: 21 Nov 2006 06:34:32 -0800
Subject: interleaving dictionary values
Message-ID: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>


Hello,

I was trying to create a flattened list of dictionary values where each
value is a list, and I was hoping to do this in some neat functionally
style, in some brief, throwaway line so that it would assume the
insignificance that it deserves in the grand scheme of my program.

I had in mind something like this:

>>> interleave([1, 2, 3], [4,5], [7, 8, 9])
[1, 4, 7, 2, 5, 8, 3, 9]

I played for a while with zip(), [some newfangled python keyword, that
I was truly shocked to find has been hiding at the bottom of the list
built in functions since version 2.0], before giving up and going back
to trusty old map(), long celebrated for making code hard to read:

>>> map(None, [1, 2, 3], [4,5], [7, 8, 9])
[(1, 4, 7), (2, 5, 8), (3, None, 9)]

This is basically it.  It then becomes:

>>> filter(None, flatten(map(None, [1, 2, 3], [4,5], [7, 8, 9])))
[1, 4, 7, 2, 5, 8, 3, 9]

filter(None, - my brain parses that automatically now.  This is not so
bad.  Flatten is snitched from ASPN/Cookbook/Python/Recipe/363051,
thank you Jordan Callicoat, Mike C. Fletcher:

def flatten(l, ltypes=(list, tuple)):
    i = 0
    while (i < len(l)):
       while (isinstance(l[i], ltypes)):
           l[i:i+1] = list(l[i])
       i += 1
    return l

Trouble is then getting map() to play with the result of dict.values().
 I only worked this out while writing this post, of course.

Given a dictionary like d = { "a" : [1, 2, 3], "b" : [4, 5], "c" : [7,
8, 9]} - I was hoping to do this:

  map(None, d.values())

But instead I (finally worked out I could) do this:

  apply(map, tuple([None] + d.values()))

So... my bit of code becomes:

  filter(None, flatten(map(None, apply(map, tuple([None] +
d.values())))))

It fits on one line, but it feels far more evil than I set out to be.
The brackets at the end are bad for my epilepsy.

Surely there is there some nice builtin function I have missed?

--
| John J. Lehmann, j1o1h1n(@)gmail.com
+ [lost-in-translation] "People using public transport look stern, and
handbag
+ snatchers increase the ill feeling."  A  Japanese woman, Junko, told
the paper:
+ "For us, Paris is the dream city. The  French are all beautiful and
elegant
+ And then, when we arrive..."



From rridge at csclub.uwaterloo.ca  Tue Nov  7 17:48:35 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 7 Nov 2006 14:48:35 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
Message-ID: <1162939715.915139.146890@b28g2000cwb.googlegroups.com>

Martin v. L?wis wrote:
> How would you propose to fix file_repr to prevent such
> a race condition?

Ross Ridge schrieb:
> The race condition you describe is different from the one Joe Seigh
> described.  It's caused because without GIL access to the file object
> is no longer thread safe, not because reference counting isn't thread
> safe.

Martin v. L?wis wrote:
> Joe's claim (quoting him) was: "Atomic increment and decrement
> instructions are not by themselves sufficient to make reference
> counting safe."

So give an example where reference counting is unsafe.

Remember that I only said that Joe Seigh's statement didn't make sense,
not that I had some magic solution that would somehow make Python
thread safe without locking.   

                   Ross Ridge



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Nov  1 08:28:08 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 01 Nov 2006 14:28:08 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>
	<mailman.1563.1162321248.11739.python-list@python.org>
Message-ID: <4qrln8Fo2ollU1@individual.net>

Fredrik Lundh wrote:

> what's wrong with using enumerate?  or a list comprehension?  or
> some other of the many different ways you can use to build a list
> from a set of values?

Shouldn't there be one -- and preferably only one -- obvious way to
do it? 8)

Python Cookbook says "enumerate()", is this still correct with 2.5?

Regards,


Bj?rn

-- 
BOFH excuse #195:

We only support a 28000 bps connection.



From bedouglas at earthlink.net  Wed Nov 15 18:29:46 2006
From: bedouglas at earthlink.net (bruce)
Date: Wed, 15 Nov 2006 15:29:46 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <455ba1a9$0$4218$426a74cc@news.free.fr>
Message-ID: <1a2e01c7090d$f074cdc0$0301a8c0@tmesa.com>

ummm bruno...

you don't 'need' apache to run php.

in fact, although i'm from the old hard c/c++ world.... way before web apps,
i haven't really found much for most general apps (not ui/not threaded
stuff) that php can't do..

peace


-----Original Message-----
From: python-list-bounces+bedouglas=earthlink.net at python.org
[mailto:python-list-bounces+bedouglas=earthlink.net at python.org]On Behalf
Of Bruno Desthuilliers
Sent: Wednesday, November 15, 2006 3:46 PM
To: python-list at python.org
Subject: Re: Python v PHP: fair comparison?


walterbyrd a ?crit :
> Bjoern Schliessmann wrote:
>
>>walterbyrd wrote:
>>
>>
>>>- PHP has a lower barrier to entry
>>
>>Which kind of barrier do you mean -- syntax, availability, ...?
>
>
> Putting php into a web-site is as easy as throwing some php code into a
> my html file, and maybe giving the file a php extension. I can get php
> hosting for $10 a year easy.
>
> This may not be what you want for a major developement project,

Not even for a minor one. While one can write not-trivial applications
in PHP, the kind of work this requires would greatly benefit from a real
programming language (vs a Q&D web scripting language).

> but the
> barrier to entry is very low.
>
Ok. This observation is very specific to web development. Python is a
general purpose programming language. And from this POV, it's IMHO much
easier to learn. And not only because you don't need Apache to use it.
--
http://mail.python.org/mailman/listinfo/python-list



From walterbyrd at iname.com  Mon Nov 27 10:55:58 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 27 Nov 2006 07:55:58 -0800
Subject: Is PyGTK only for local - not web?
Message-ID: <1164642958.887985.53910@h54g2000cwb.googlegroups.com>

I have noticed that there is also pygtk-web project, I suppose that is
what you use for the web?



From __peter__ at web.de  Thu Nov 16 06:24:19 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Nov 2006 12:24:19 +0100
Subject: split CSV fields
References: <ejhduq$l5l$1@news.albasani.net>
	<mailman.238.1163673019.32031.python-list@python.org>
	<1163674830.440318.246920@f16g2000cwb.googlegroups.com>
Message-ID: <ejhhoa$7k9$03$1@news.t-online.com>

John Machin wrote:

> | >>> s='"123","a,b,\"c\"",5.640'

Note how I fixed the input:

>>> '"123","a,b,\"c\"",5.640'
'"123","a,b,"c"",5.640'

>>> '"123","a,b,\\"c\\"",5.640'
'"123","a,b,\\"c\\"",5.640'

Peter


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Date: 15 Nov 2006 12:10:23 -0800
Subject: MALAYSIAN SEXY GIRL
Message-ID: <1163621423.572518.89330@m73g2000cwd.googlegroups.com>

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From Leo.Kislov at gmail.com  Sat Nov 18 04:23:22 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 18 Nov 2006 01:23:22 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<455CED78.1060604@v.loewis.de>
	<bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>
	<455CF4BA.1050608@v.loewis.de>
	<1163759435.551233.76030@j44g2000cwa.googlegroups.com>
	<455E5C61.5030502@v.loewis.de>
Message-ID: <1163841802.859750.105910@h54g2000cwb.googlegroups.com>

Martin v. L?wis wrote:
> Leo Kislov schrieb:
> > How about returning two lists, first list contains unicode names, the
> > second list contains undecodable names:
> >
> > files, troublesome = os.listdir(separate_errors=True)
> >
> > and make separate_errors=True by default in python 3.0 ?
>
> That would be quite an incompatible change, no?

Yeah, that was idea-dump. Actually it is possible to make this idea
mostly backward compatible by making os.listdir() return only unicode
names and os.binlistdir() return only binary directory entries.
Unfortunately the same trick will not work for getcwd.

Another idea is to map all 256 bytes to unicode private code points.
When a file name cannot be fully decoded the undecoded bytes will be
mapped to specially allocated code points. Unfortunately this idea
seems to leak if the program later wants to write such unicode string
to a file. Python will have to throw an exception since we don't know
if it is ok to write broken string to a file. So we are back to square
one, programs need to deal with filesystem garbage :(

  -- Leo



From bill_maxwell_notMyRealAddress at notreal.net  Thu Nov  9 23:37:45 2006
From: bill_maxwell_notMyRealAddress at notreal.net (Bill Maxwell)
Date: Thu, 09 Nov 2006 23:37:45 -0500
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
Message-ID: <6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>

On 8 Nov 2006 11:49:07 -0800, "John Henry" <john106henry at hotmail.com>
wrote:

>
>John Salerno wrote:
>> Dan Lenski wrote:
>>
>> > So, is there another toolkit I should be looking at?
>>
>> I highly recommend wxPython. It's very mature, full-featured, and
>> portable, and fairly easy to learn as well. I can't really compare it to
>> other toolkits (not having used any of them, except Tkinter), but it's
>> definitely one of the most popular and well-supported ones out there.
>>
>> http://www.wxpython.org/
>
>I highly recommend that you try PythonCard (which sits on top of
>wxPython).  You can get productive very very quickly.  Take a look at:
>
>http://pythoncard.sourceforge.net/walkthrough1.html


I took a brief look at PythonCard almost a year ago and got discouraged
by what I found, so I stopped looking at it.  I've inserted my notes
from back then, below.  Does anybody know if these things have been
fixed in the latest release?

Bill


=====================================================================
My notes from Fri Dec-23-2005:

This is a list of gripes I have while trying to learn about PythonCard.
I'm trying to investigate various GUI builders for Python, and
PythonCard looks promising, but a lot of things are getting in the way.

I installed yesterday, using this installer:
PythonCard-0.8.1.FIXED.win32.exe

A)  The very first example in the tutorial is wrong!  

	On this page:  http://pythoncard.sourceforge.net/documentation.html
	When you follow this link to try something for the very first time:

		Getting Started in PythonCard by Dan Shafer: 
			http://pythoncard.sourceforge.net/walkthrough1.html

	You quickly see that the minimal.py example doesn't even contain
this line, even though the tutorial refers to it:

		def on_menuFileAbout_select(self, event):

	And, of course, if you replace the word "pass" with this, as
instructed:

		result = dialog.alertDialog(self, 'It works!', 'Showing Off')

	it won't run, because the existing "pass" line isn't inside a def
inside of a class.


B)  Is the Notebook widget really supported?

	In the installed file "changelog.txt" (gets installed as part of
PythonCard installation), it says:

		"added Notebook component, PageBackground, and testNotebook
 		sample"

	But, the testNotebook sample is nowhere to be found.

	I looked lots of places, including the main SourceForge web site,
and on the wiki, here:

		http://wiki.wxpython.org/index.cgi/PythonCard

	Both the main website and the wiki seem way out of date, and the
latest dates I could find on both of them are sometime in 2004.

	Finally, by following the mailing list archive link on the main
website, I managed to find a reference to the notebook component on the
ASPN site, where some guy named Brian wonders about the same thing as
me, concerning the availability of the notebook component:

		http://aspn.activestate.com/ASPN/Mail/Message/pythoncard/2536825

	and, that message led me here:

		http://article.gmane.org/gmane.comp.python.pythoncard/1060

	where Kevin Altis admits that he forgot to include it in the 0.8.1
release!  At least he provides a way to download it separately.  But,
gheesh, this is pretty poor for a new user.  I was interested in using
the notebook component right away, because I looked at the wxGlade
tutorial before looking at PythonPage, and they use the notebook
component in their example (and I decided I really want to use the
component).

	To add insult to injury, after you download the zip file with the
testNotebook stuff, the readme file says this:

		"Until we have a Notebook integrated into some of the other
samples or tools this will serve as a basic test app, but I don't expect
to include it in releases."

C)  Are the websites being maintained?


From rrr at ronadam.com  Fri Nov 10 19:32:44 2006
From: rrr at ronadam.com (Ron Adam)
Date: Fri, 10 Nov 2006 18:32:44 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4554ECBF.7040603@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>
	<4554ECBF.7040603@hobbshouse.org>
Message-ID: <ej35ue$52k$1@sea.gmane.org>

Michael Hobbs wrote:
> Ron Adam wrote:
>> It is also an outline form that frequently used in written languages.  Something 
>> python tries to do, is to be readable as if it were written in plain language 
>> where it is practical to do so.  So the colon/outline form makes a certain sense 
>> in that case as well.
>>   
> That is perhaps the most convincing argument that I've heard so far. 
> Indeed, I often find myself writing out colons when writing pseudo-code 
> out on paper. The reason, however, is usually because my indents don't 
> quite line up as perfectly on paper as they do in an editor. The colons 
> provide a form of backup separation for when my columns start to get 
> sloppy. (Natural language is actually filled with such redundancies in 
> order to compensate for sloppy handwriting.) This backup function 
> obviously isn't needed when a computer is taking care of the layout.
> 
> My final argument against the colons is to simply try programming in 
> Ruby for a while and then come back to Python. I think you'll find that 
> programming without the colons just simply feels more "natural".

LOL,  of course it would.  I would expect that too after a suitable amount of 
'brain washing', oops, I mean training and conditioning. ;-)

The point is what is more natural to "read" with a minimum amount of 
explanation. I would think for most people who are learning programming for the 
first time, it is things that resemble things they already know.  Such as 
outlining with colons.

Leaving the colon out probably would feel more natural for writing once you get 
used to it.  After all it is a bit less typing.   But I don't think it would be 
the most readable choice for most people.  It's probably a trade off, 
readability vs writability.  Another python development guideline is to favor 
readability over writability on the presumption we tend to write code once, but 
read code many times.

Here's an alternative test.  Write a program to remove all the end of line 
colons from pythons library and then write another separate program to put them 
back in.  Will it miss any?  will it pass the python test suite?

I think you will find that that is more complex than it sounds.  Try writing 
colorizing routines for both versions?  Which is easier?

Cheers,
    Ron


PS.  Rather than shav of on character her and ther in pythons programing 
languag, Lets remov all the silent leters from the english languag. That will 
sav thousands mor kestroks over a few yers.

I think if you try that for a few months and then switch back, you will find 
writing without the silent letters just feels more natural.  ;)




From tim at tdw.net  Thu Nov  9 10:57:53 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 9 Nov 2006 15:57:53 +0000
Subject: extract text from a string
In-Reply-To: <B57185569.857.20234.1@mxextra>
References: <B57185569.857.20234.1@mxextra>
Message-ID: <9afea2ac0611090757hf414239rfcb7243420a33466@mail.gmail.com>

On 9 Nov 2006 07:45:25 -0800, boris.smirnov at gmail.com
<boris.smirnov at gmail.com> wrote:

>
> I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
> become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
> code of how to extract this text from that string?
>

for that particular string

>>> "+abc_cde.fgh_jkl\n"[1:-1]
'abc_cde.fgh_jkl'
>>> "+abc_cde.fgh_jkl\n".strip()[1:]
'abc_cde.fgh_jkl'
>>> "+abc_cde.fgh_jkl\n"[1:].strip()
'abc_cde.fgh_jkl'
>>> "+abc_cde.fgh_jkl\n"[1:].strip().replace('+','')
'abc_cde.fgh_jkl'
>>> "+abc_cde.fgh_jkl\n"[1:].replace('\n','').replace('+','')
'abc_cde.fgh_jkl'

I'm sure there are other ways too !!

HTH :)


From gblais at cox.net  Sat Nov  4 20:31:55 2006
From: gblais at cox.net (gblais at cox.net)
Date: Sun, 5 Nov 2006 01:31:55 GMT
Subject: wing ide vs. komodo?
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<mailman.480.1160767168.11739.python-list@python.org>
	<tURXg.27343$Go3.5193@dukeread05>
	<mailman.481.1160768935.11739.python-list@python.org>
	<18SXg.27347$Go3.9933@dukeread05>
	<mailman.482.1160769808.11739.python-list@python.org>
	<XMSXg.27356$Go3.11355@dukeread05>
Message-ID: <Z9b3h.2827$IJ1.2467@newsfe15.lga>

I have both, but the IDE I use every day is SPE, which is shareware.  I'm
not savvy enough to enumerate a feature comparison, but I do find SPE
extremely friendly and intuitive.

Gerry


From news at p2b.datatailors.com  Thu Nov  9 06:31:12 2006
From: news at p2b.datatailors.com (Peter van Kampen)
Date: 09 Nov 2006 11:31:12 GMT
Subject: Is there a commas-in-between idiom?
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
	<slrnel39n2.9hk.news@datatailors.xs4all.nl>
	<mailman.1935.1163021371.11739.python-list@python.org>
Message-ID: <slrnel64at.vcg.news@datatailors.xs4all.nl>

On 2006-11-08, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> At Wednesday 8/11/2006 16:51, Peter van Kampen wrote:
>
>>"""
>>A = B = [] # both names will point to the same list
>>"""
>>
>>I've been bitten by this once or twice in the past, but I have always
>>wondered what it was useful for? Can anybody enlighten me?
>
> As an optimization, inside a method, you can bind an instance 
> attribute and a local name to the same object:
>
>      def some_action(self):
>          self.items = items = []
>          // following many references to self.items,
>          // but using items instead.
>
> Names in the local namespace are resolved at compile time, so using 
> items is a lot faster than looking for "items" inside self's 
> namespace each time it's used.

Nice example.

Thanks,

PterK

-- 
Peter van Kampen
pterk -- at -- datatailors.com


From grante at visi.com  Wed Nov 29 10:41:19 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Nov 2006 15:41:19 -0000
Subject: How to detect what type a variable is?
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
Message-ID: <12mragv4f1jhfb4@corp.supernews.com>

On 2006-11-29, Leandro Ardissone <lardissone at gmail.com> wrote:

> I want to know what type is a variable. For example, I get the
> contents of an xml but some content is a list or a string, and
> I need to know what type it is.

>>> x = 'asdf'
>>> type(x)
<type 'str'>
>>> i = 0
>>> type(i)
<type 'int'>
>>> 

-- 
Grant Edwards                   grante             Yow!  I Know A Joke!!
                                  at               
                               visi.com            


From filipwasilewski at gmail.com  Fri Nov 17 14:17:49 2006
From: filipwasilewski at gmail.com (Filip Wasilewski)
Date: 17 Nov 2006 11:17:49 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <1163791069.178490.198740@j44g2000cwa.googlegroups.com>

sturlamolden wrote:
> Boris wrote:
> > Hi, is there any alternative software for Matlab? Although Matlab is
> > powerful & popular among mathematical & engineering guys, it still
> > costs too much & not publicly open. So I wonder if there's similar
> > software/lang that is open & with comparable functionality, at least
> > for numerical aspect. Thanks!
>
> I have used Matlab for years, and has recently changed to Python. In
> addition one needs NumPy and Matplotlib, and perhaps SciPy. Other
> useful packages are PyGTK for GUI, PyGame for multimedia, PyOpenGL for
> 3D graphics, Mpi4Py for parallel computation, etc. You will find python
> packages for nearly any conceivable task. Unlike Matlab, Python is a
> general purpose programming language, and a distant cousin of Lisp. The
> Python language is fare more expressive and productive than Matlab, yet
> even more easy to use.

Huh, so you don't think it's just damn sexy to do OOP, networking and
databases by multiplying matrices?;-)


> The NumPy package is the core requirement for numerical work in Python.
> It is quite different form Matlab, but I think it is more powerful.
> Particularly, arrays are passed by reference (not by value), and
> indexing creates view matrices.

For those interested in drilling down on this topic there is a Numpy
for Matlab Users guide at http://scipy.com/NumPy_for_Matlab_Users


> To compare Matlab with NumPy we can e.g. use the D4 discrete wavelet
> transform. I have here coded it in Matlab and Python/NumPy using Tim
> Swelden's lifting scheme.
[...]

Actually you have not. The algorithm you presented gives completely
wrong results. Have a look at quick&dirty(TM) implementation bellow.

import math
import numpy

def d2_lwt(x, axis=-1, level=None, copy=False):
    """
    Daubechies2 (4 point support) Lifting Wavelet Transform in NumPy
    """
    C1 = 1.7320508075688772    # sqrt(3)
    C2 = 0.4330127018922193    # sqrt(3)/4
    C3 = -0.066987298107780702 # (sqrt(3)-2)/4)
    C4 = 0.51763809020504137   # (sqrt(3)-1)/sqrt(2)
    C5 = 1.9318516525781364    # (sqrt(3)+1)/sqrt(2)

    if not isinstance(x, numpy.ndarray) or x.dtype.kind != 'f':
        x = numpy.array(x, dtype=numpy.float64)
    elif copy:
        x = x.copy()

    max_level = int(math.floor(math.log(x.shape[axis],2)))
    if level is None:
        level = max_level
    else:
        assert level <= max_level, "Level param too high"

    coeffs = []
    cA = x.swapaxes(0, axis)
    while level > 0:
        level -= 1

        # lazy
        even = cA[::2]
        odd = cA[1::2]

        # dual
        # using `even = even + C1*odd` may speed up things on
        # some machines (only for not in-place transform).
        even += C1*odd

        # primal
        odd[0] -= C2*even[0] + C3*even[-1]
        odd[1:] -= C2*even[1:] + C3*even[:-1]

        # dual
        even[:-1] -= odd[1:]
        even[-1] -= odd[0]

        # scale
        even *= C4
        odd *= C5

        cA, cD = even, odd
        coeffs.append(cD.swapaxes(axis, 0))

    coeffs.append(cA.swapaxes(axis, 0))
    coeffs.reverse()
    return coeffs

if __name__ == "__main__":
    d = [1,5,3,2,4,8,5,2]
    data = [
        numpy.array(d, dtype=numpy.float32),
        numpy.array(d, dtype=numpy.float64),
        numpy.array([d]*2, dtype=numpy.float64),
        numpy.array([d]*2, dtype=numpy.float32),
        numpy.array(d, dtype=numpy.int32),
        [d]*2,
        [[d,d]]*3,
    ]

    for i,x in enumerate(data):
        print "Case %d:" % (i+1)
        print "x in:\n", x
        coeffs = d2_lwt(x, axis=-1, level=None, copy=False)
        print "coeffs:"
        for c in coeffs:
            print c, c.dtype
        print "x out:\n", x
        print


Please excuse me not including Matlab version here, I would like to
have a free weekend.

As far as the speed comparison is concerned I totally agree that NumPy
can easily outperform Matlab in most cases. Of course one can use
compiled low-level extensions to speed up specific computations in
Matlab, but it's a lot easier and/or cheaper to find very good tools
for Python.


> If anyone wonders why I think Travis Oliphant and the NumPy team should
> be knighted, then this is the answer.

Would love to see the ceremony:)

cheers,
fw



From dannycolligan at gmail.com  Thu Nov 16 10:32:53 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 16 Nov 2006 07:32:53 -0800
Subject: Yield
In-Reply-To: <455c1ddf@news.eftel.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
Message-ID: <1163691173.737911.130410@i42g2000cwa.googlegroups.com>

Now that we're on the subject, what are the advantages of using
generators over, say, list comprehensions or for loops?  It seems to me
that virtually all (I won't say everything) the examples I've seen can
be done just as easily without using generators.  For example,
Fredrik's initial example in the post:

>>> a = [1,2,3]
>>> for i in a: print i
...
1
2
3
>>> sum(a)
6
>>> [str(i) for i in a]
['1', '2', '3']
>>>

Carsten mentioned that generators are more memory-efficient to use when
dealing with large numbers of objects.  Is this the main advantage of
using generators?  Also, in what other novel ways are generators used
that are clearly superior to alternatives?

Thanks in advance,

Danny

On Nov 16, 3:14 am, John Machin <sjmac... at lexicon.net> wrote:
> On 16/11/2006 7:00 PM, Fredrik Lundh wrote:
>
> > John Machin wrote:
>
> >>> I would like to thanks Fredrik for his contribution to improve that.
>
> >> Call me crazy, but after an admittedly quick read, the version on the
> >> wiki seems to be about word for word with on the docs.python.org version.
>
> > maybe he was thinking about the article I posted, or the FAQ link I
> > posted in a followup:
>
> >    http://effbot.org/pyfaq/what-is-a-generator.htm
>
> > which was based on my article and the glossary entry from the tutorial:
>
> >    http://effbot.org/pytut/glossary.htm#generatorQuite possibly.
>
>
>
> >> Could you please tell us how you think the wiki version is an
> >> improvement?
>
> > an "add comment" link?  direct URL:s for all concepts in the language?
> > extensive hyperlinking?  semantic retargetable markup?Yes, they're great. Maybe I was thinking about the text contents only :-)
> 
> Cheers,
> John



From jorge.vargas at gmail.com  Thu Nov  9 20:59:49 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 10 Nov 2006 01:59:49 +0000
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <32822fe60611091759r7f61dab9m45794b3d8ea29c3c@mail.gmail.com>

On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
> both are interpreted oo langauges......
>
that is not correct java is compiled and the VM interprets the code
from the programmers point  of view java is a compiled languaje.

python is dynamic typed java is static
python allows functional programming as well as procedural, java doesn't
java is OO in the API, python is OO everywhere.

tons of other things
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From robert.kern at gmail.com  Tue Nov 14 22:21:23 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 14 Nov 2006 21:21:23 -0600
Subject: reduce to be removed?
In-Reply-To: <1163559479.415682.138010@k70g2000cwa.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>	<mailman.2122.1163291415.11739.python-list@python.org>	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>	<mailman.2127.1163297289.11739.python-list@python.org>	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>	<mailman.0.1163325764.32031.python-list@python.org>	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>	<1163378573.018479.261660@b28g2000cwb.googlegroups.com>
	<1163559479.415682.138010@k70g2000cwa.googlegroups.com>
Message-ID: <eje140$23f$1@sea.gmane.org>

Dustan wrote:

> 2. While I haven't taken a good look at NumPy, my intuition tells me it
> won't work with complex data types, which wouldn't work for me at all.
> 
> Am I correct on that second one?

No. numpy can make arrays of Python objects in addition to arrays of double,
unsigned int, etc.

-- 
Robert Kern

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



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 19:44:48 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 11:44:48 +1100
Subject: explicit self revisited
References: <ej5fuv$a4a$1@online.de> <ej5i3k$6l3$1@sea.gmane.org>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2120.1163290207.11739.python-list@python.org>
Message-ID: <pan.2006.11.12.00.44.48.217739@REMOVE.THIS.cybersource.com.au>

On Sat, 11 Nov 2006 18:09:59 -0600, skip wrote:

> 
>     Doug> The explicit self is there simply because OOP was tacked onto
>     Doug> python as an afterthought.
> 
> Got a reference to support that claim?

Of course not, since it is a classic example of trolling.

By comparison, the way I read the Original Poster, he was sincere if
misguided -- but Doug's bullshit response is a typical attempt to throw
petrol on an already hot situation.


-- 
Steven.



From wiggly at wiggly.org  Wed Nov 15 12:33:26 2006
From: wiggly at wiggly.org (Nigel Rantor)
Date: Wed, 15 Nov 2006 17:33:26 +0000
Subject: modules and generated code
In-Reply-To: <ejfhqf$189$1@aioe.server.aioe.org>
References: <mailman.146.1163514956.32031.python-list@python.org>	<ejckue$ns2$01$1@news.t-online.com>	<mailman.150.1163517249.32031.python-list@python.org>	<ejcq59$920$00$1@news.t-online.com>	<mailman.163.1163526017.32031.python-list@python.org>
	<ejfhqf$189$1@aioe.server.aioe.org>
Message-ID: <455B4F66.9000408@wiggly.org>

J. Clifford Dyer wrote:
> 
> Maybe I'm missing something obvious, but it sounds like you are 
> over-complicating the idea of inheritance.  Do you just want to create a 
> subclass of the other class?

Nope, that isn't my problem.

I have an IDL file that is used to generate a set of stub and skeleton 
code that is not human-modifiable.

Eventually I would like to have my IDL in source control and have a 
setup script able to generate my stubs and skels and install them for me.

At the same time I want to produce code that uses this code but in the 
same package.

In Java or Perl I can easily create a couple package/module like this:

package org.mine.package;

[...class definitions...]


and then somewhere else

package org.mine.otherpackage;

[...class definitions...]

These can be compiled into separate Jar files and just work.

Since the python is the final target though I don't want to put it all 
in one directory because then I need to be clever when I regenerate the 
generated code, I don't want old python modules lying around that are no 
longer in the IDL. Blowing the entire generated directory away is the 
best way of doing this, so I don't want my implementation code in there.

Basically, I want the same top-level package to have bits of code in 
different directories, but because Python requires the __init__.py file 
it only picks up the first one in PYTHONPATH.

I'm not sure if that makes sense, my brain is already toast from 
meetings today.

   n







From gabor at nekomancer.net  Sun Nov 19 15:24:48 2006
From: gabor at nekomancer.net (gabor)
Date: Sun, 19 Nov 2006 21:24:48 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <mailman.475.1163967608.32031.python-list@python.org>
References: <mailman.294.1163721712.32031.python-list@python.org>	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>	<455d507d$0$18480$9b622d9e@news.freenet.de>	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>	<455E5D15.7030207@v.loewis.de>	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<mailman.475.1163967608.32031.python-list@python.org>
Message-ID: <8a200$4560bd8e$59ad1aca$1481@news.flashnewsgroups.com>

Fredrik Lundh wrote:
> gabor wrote:
> 
>> yes, sure... but then.. it's possible to implement it also on top of 
>> an raise-when-error version :)
> 
> not necessarily if raise-when-error means raise-error-in-os-listdir.
> 

could you please clarify?

currently i see 2 approaches how to do it on the raise-when-error version:

1.
dirname = u'something'
try:
	files = os.listdir(dirname)
except UnicodeError:
	byte_files = os.listdir(dirname.encode('encoding))
	#do something with it

2.

dirname = u'something'
byte_files = os.listdir(dirname.encode('encoding'))
for byte_file in byte_files:
	try:
		file = byte_file.decode(sys.getfsenc())
	except UnicodeError:
		#do something else
	#do something


the byte-string version of os.listdir remains. so all the other versions 
can be implemented on the top of it. imho the question is:
which should be the 'default' behavior, offered by the python standard 
library.

gabor


From theller at ctypes.org  Fri Nov 10 09:27:52 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 10 Nov 2006 15:27:52 +0100
Subject: announce: FAQs suggested
In-Reply-To: <1163167884.303515.257820@k70g2000cwa.googlegroups.com>
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>	<ej20b4$rjj$02$1@news.t-online.com>
	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>
Message-ID: <45548C68.1080501@ctypes.org>

p.lavarre at ieee.org schrieb:
>> > > http://effbot.org/pyfaq/suggest.htm
>> > FAQ: How do I say returns void in ctypes?
>> That's in the ctypes documentation, where it belongs.
> 
> Thank you, before I never had found "Use None for void a function not
> returning anything" at:
> http://starship.python.net/crew/theller/ctypes/reference.html
> 
> Now I see, that find corresponds to:
> http://docs.python.org/dev/lib/ctypes-foreign-functions.html
> 
> I think this remains an FAQ, because I see void is missing from much
> more prominent places:
> http://docs.python.org/dev/lib/node452.html "Fundamental data types"

I don't think it belongs in the above section because 'void' is not a type.

> http://docs.python.org/dev/lib/ctypes-return-types.html

A note could probably be added to this section.

> Finding a way to suggest improving those docs would help more than
> suggesting an FAQ, I agree.
> 
>> > > > http://effbot.org/pyfaq/suggest.htm
>> > FAQ: How do I say unsigned char in ctypes?
>> That's in the ctypes documentation, where it belongs.
> 
> Yes and no.  The whole FAQ suggested was:
> 
> FAQ: How do I say unsigned char in ctypes?
> A: ctypes.c_ubyte
> ctypes doesn't define c_uchar. This actually is doc'ed, it's just
> annoying.
> 
> Per your kind correction above re void, I see we could also say:
> 
> FAQ: How do I say returns void in ctypes?
> A: restype = None
> ctypes doesn't define c_void. This actually is doc'ed obscurely, it's
> just irregular.


I don't think that this is irregular, see comment about void not being a type.

Thomas



From stefan.behnel-n05pAM at web.de  Wed Nov 22 10:23:05 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 22 Nov 2006 16:23:05 +0100
Subject: XML Validation in Python using XSV
In-Reply-To: <1164207925.488546.265120@h54g2000cwb.googlegroups.com>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
	<45644E9A.3030209@web.de>
	<1164202262.974495.289490@f16g2000cwb.googlegroups.com>
	<45645F93.7050907@web.de>
	<1164207925.488546.265120@h54g2000cwb.googlegroups.com>
Message-ID: <45646B59.4020908@web.de>

bmichel at gmail.com wrote:
> Stefan Behnel wrote:
>>> bmichel at gmail.com wrote:
>>> Stefan Behnel wrote:
>>>> BTW: any reason you need to use XSV? There are some other libraries out there
>>>> that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
>>>> much more powerful than XSV.
>>> No particular reason for XSV
>>> I just want to validate XML files against an XML schema through Python.
>>> If you can suggest any other package for debian, I'll be glad to try
>>> it.
>> Well, as I said:
>>
>> http://packages.debian.org/unstable/python/python-lxml
>> http://codespeak.net/lxml/
>>
>> Just try "apg-get install python-lxml".
>
> I've read a bit about lxml, didn't found anything related to validating
> XML schema...
>
> Maybe you can give more details on how to install lxml and use it in
> Python to validate XML files against an XML Schema
> I'm going to ask the server administrator to install lxml, so I can't
> play around a lot with the system trying stuff.
>
> It would be nice if you can tell me:
> - What files to download, where to download them from
> - How to install it and configure it
> - How to import the functions in Python

Being able to read can simplify a lot of things these days.

See above to find out how to install lxml on Debian. See the page mentioned
above to find out how to use lxml. I mean this page:

http://codespeak.net/lxml/

in particular this section:

http://codespeak.net/lxml/#documentation

or simply search that page for things like "XML Schema" or "API documentation".

Hope that gets you on the right track,
Stefan


From steven.bethard at gmail.com  Mon Nov 13 10:20:51 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 13 Nov 2006 08:20:51 -0700
Subject: Python development time is faster.
In-Reply-To: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>

Chris Brat wrote:
> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
> 
> Does anyone have any comments on that statement from personal
> experience?

I had to work at a laboratory a few years ago which used Java 
exclusively.  I was coming from several years as a graduate student 
using Python almost exclusively for my own work.  (But I used to teach 
introductory Java classes at my previous university, so I had plenty of 
Java experience.)

My own work and the work that I did for the lab were quite similar, 
mainly focused on training machine learning models on natural language 
processing tasks. I estimated that the Java code took me about 5x as 
long. Part of this is the verbosity of Java, e.g. where you have to 
write an anonymous inner class instead of using a function or a class 
object directly. But probably a larger part of this was using the Java 
libraries, which tend to be way over-engineered, and more complicated to 
use than they need to be.

A simple example from document indexing.  Using Java Lucene to index 
some documents, you'd write code something like::

     Analyzer analyzer = new StandardAnalyzer()
     IndexWriter writer = new IndexWriter(store_dir, analyzer, true)
     for (Value value: values) {
         Document document = Document()
         Field title = new Field("title", value.title,
                                 Field.Store.YES,
                                 Field.Index.TOKENIZED)
         Field text = new Field("text", value.text,
                                Field.Store.YES,
                                Field.Index.TOKENIZED)
         document.add(title)
         document.add(text)
     }

Why is this code so verbose?  Because the Lucene Java APIs don't like 
useful defaults. So for example, even though StandardAnalyzer is 
supposedly *Standard*, there's no IndexWriter constructor that includes 
it automatically. Similarly, if you create a Field with a string name 
and value (as above), you must specify both a Field.Store and a 
Field.Index - there's no way to let them default to something reasonable.

Compare this to Python code. Unfortunately, PyLucene wraps the Lucene 
APIs pretty directly, but I've wrapped PyLucene with my own wrapper that 
adds useful defaults (and takes advantages of things like Python's 
**kwargs).  Here's what the same code looks like with my Python wrapper 
to Lucene::

     writer = IndexWriter(store_dir)
     for value in values:
         document = Document(title=value.title, text=value.text)
         writer.addDocument(document)
     writer.close()

Gee, and I wonder why it took me so much longer to write things in Java. ;-)


STeVe


From cousinstanley at hotmail.com  Sat Nov 25 11:54:46 2006
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Sat, 25 Nov 2006 10:54:46 -0600
Subject: Invoking Python from Cygwin problem.
References: <1164385876.755749.139020@l39g2000cwd.googlegroups.com>
Message-ID: <1164473686_17679@sp6iad.superfeed.net>



> Hi all,
>
> Using cygwin and Python 2.5, I have the following scripts, 
> one bash script and the other a python script:
> --------------------------------------------------------------

Ant .... 

  Using Cygwin and Python 2.4 under Win2K the following version 
  of your code seems to work OK here with no extraneous CR ....

  I only changed the variable names & messages just a bit 
  for clarity ....

  I don't see any real differences in this version
  and what you originally posted, so I can't explain
  the reason for the semingly extraneous carriage return
  that you are seeing ....
      
  # ------------------------------------------------------------ 

  #!/bin/bash

  TEST_1=`./test.py`
  TEST_2="Testing Bash  Value"

  echo " "
  echo "TEST_1 :  $TEST_1 .... OK"
  echo "TEST_2 :  $TEST_2 .... OK"


  # ------------------------------------------------------------

  #!/usr/bin/python
  print "Testing Python Code",


  # ------------------------------------------------------------

  $ ./test_vars

  TEST_1 :  Testing Python Code .... OK
  TEST_2 :  Testing Bash  Value .... OK
  

-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From Roberto.Bonvallet at cern.ch  Tue Nov 28 07:14:31 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Tue, 28 Nov 2006 12:14:31 +0000 (UTC)
Subject: Modifying every alternate element of a sequence
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <ekh977$pov$1@cernne03.cern.ch>

jm.suresh at no.spam.gmail.com wrote:
> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
[...]
> But is there any other better way to do this.

I think the best way is the one that uses slices, as somebody suggested
in this thread.  This is another (worse) way, just for fun:

    >>> from itertools import cycle
    >>> input = [1, 2, 3, 4, 5, 6]
    >>> wanted = [x * sign for x, sign in zip(input, cycle([1, -1]))]
    >>> wanted
    [1, -2, 3, -4, 5, -6]

Cheers,
-- 
Roberto Bonvallet


From fredrik at pythonware.com  Fri Nov 10 11:50:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 17:50:16 +0100
Subject: announce: FAQs suggested
In-Reply-To: <1163170817.527911.85510@b28g2000cwb.googlegroups.com>
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>	<ej20b4$rjj$02$1@news.t-online.com>	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>	<mailman.2034.1163169174.11739.python-list@python.org>
	<1163170817.527911.85510@b28g2000cwb.googlegroups.com>
Message-ID: <ej2ak9$85c$1@sea.gmane.org>

p.lavarre at ieee.org wrote:

>>> http://docs.python.org/dev/lib/ctypes-return-types.html
 >>
>> A note could probably be added to this section.
> 
> Good.  Next: Is there a place on the web where we can log that
> conclusion to inspire its resolution?

ideally, you'd click "add a comment" on the relevant library reference 
page, just like you did for the FAQ, but we're not quite there yet.  in 
the meantime, see this page:

     http://docs.python.org/tut/about.html

</F>



From vedran at v-programs.com  Thu Nov  9 13:01:29 2006
From: vedran at v-programs.com (vedran at v-programs.com)
Date: 9 Nov 2006 10:01:29 -0800
Subject: directpython object move
Message-ID: <1163095289.208707.183600@f16g2000cwb.googlegroups.com>

Hello,

How can I move objects in directpython???













               I appreciate that.Thanks



From martin.witte at gmail.com  Fri Nov 24 10:42:14 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 24 Nov 2006 07:42:14 -0800
Subject: fast listdir & stat
In-Reply-To: <ek70j3$nqp$1@news.albasani.net>
References: <ek70j3$nqp$1@news.albasani.net>
Message-ID: <1164382934.355278.154350@45g2000cws.googlegroups.com>


robert wrote:
> I want to get the files and sizes and times etc. stats of a dir fast.
> os.listdir & iterating with os.stat seems not to run at optimal speed for network folders. Is there a faster possibility? (both for Win & *nix ; best platform independent)
>
>
> Robert

An alternative is to work with os.walk() it returns a generator  - see
http://docs.python.org/lib/lib.html, and os.path.getsize(),
os.path.gettmtime() - see http://docs.python.org/lib/module-os.path.html



From jm.suresh at gmail.com  Tue Nov 28 05:38:09 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 28 Nov 2006 02:38:09 -0800
Subject: Modifying every alternate element of a sequence
Message-ID: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>

I have a list of numbers and I want to build another list with every
second element multiplied by -1.

input = [1,2,3,4,5,6]
wanted = [1,-2,3,-4,5,-6]

I can implement it like this:

input = range(3,12)
wanted = []
for (i,v) in enumerate(input):
    if i%2 == 0:
        wanted.append(v)
    else:
        wanted.append(-v)

But is there any other better way to do this.

--
Suresh



From Thomas.Ploch at gmx.net  Thu Nov 30 12:52:07 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 18:52:07 +0100
Subject: Python Worship
In-Reply-To: <1164906960.585165.64570@j44g2000cwa.googlegroups.com>
References: <1164906960.585165.64570@j44g2000cwa.googlegroups.com>
Message-ID: <456F1A47.3000906@gmx.net>

Nick schrieb:
> http://www.sciencedaily.com/releases/2006/11/061130081347.htm
> 
> World's Oldest Ritual Discovered -- Worshipped The Python 70,000 Years
> Ago
> 
> Nick
> 

That's really interesting since there is an indio tribe in the amazonas
jungle which also worships python.

That just tells me Python is right. Whatever angle you look at it.

:-D

Thomas


From guid.china at gmail.com  Mon Nov  6 02:00:11 2006
From: guid.china at gmail.com (haishan chang)
Date: Mon, 6 Nov 2006 15:00:11 +0800
Subject: how can I send several command by useing pexpect ssh
Message-ID: <a34765230611052300p13c13e16g2147192461afa602@mail.gmail.com>

I have studied pexpect example "sshls.py" and "ssh_session.py", trying to
carry several linux command by ssh. for example.
1. ssh connect one remotehost,
2. cd  /tmp directory
3. mkdir myname
4. touch  output.log

But I found these examples only can carry one command.who knows how to carry
sereval linux command continuely.
Background: I have hundreds computers, and try to control all computers at
one time.
thank you very much.
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From kevin.bell at slcgov.com  Wed Nov 29 17:05:24 2006
From: kevin.bell at slcgov.com (Bell, Kevin)
Date: Wed, 29 Nov 2006 15:05:24 -0700
Subject: open a directory in widows
Message-ID: <2387F0EED10A4545A840B231BBAAC722F116D4@slcimail1.slcgov.com>

If I want "C:\temp" to pop open on screen, how do I do it?




From daniel.dittmar at sap.com  Fri Nov  3 04:27:05 2006
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Fri, 03 Nov 2006 10:27:05 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <eif219$bat$1@news.sap-ag.de>

robert wrote:
> I'd like to use multiple CPU cores for selected time consuming Python 
> computations (incl. numpy/scipy) in a frictionless manner.
> 
> Interprocess communication is tedious and out of question, so I thought 
> about simply using a more Python interpreter instances 
> (Py_NewInterpreter) with extra GIL in the same process.

If I understand Python/ceval.c, the GIL is really global, not specific 
to an interpreter instance:
static PyThread_type_lock interpreter_lock = 0; /* This is the GIL */

Daniel




From Roberto.Bonvallet at cern.ch  Tue Nov 28 13:13:07 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Tue, 28 Nov 2006 18:13:07 +0000 (UTC)
Subject: Simple text parsing gets difficult when line continues to next
	line
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
Message-ID: <ekhu7j$4nf$1@cernne03.cern.ch>

Jacob Rael wrote:
[...]
> I would line to identify if a line continues (if line.endswith('_'))
> and concate with the next line:
> 
> line = line + nextLine
> 
> How can I get the next line when I am in a for loop using readlines?

Don't use readlines.

    # NOT TESTED
    program = open(fileName)
    for line in program:
	while line.rstrip("\n").endswith("_"):
	    line = line.rstrip("_ \n") + program.readline()
	do_the_magic()

Cheers,
-- 
Roberto Bonvallet


From g.brandl-nospam at gmx.net  Sat Nov 11 15:13:08 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 11 Nov 2006 21:13:08 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.2054.1163185546.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
Message-ID: <ej5asp$e85$1@news.albasani.net>

Ron Adam wrote:
> Michael Hobbs wrote:
> 
>> The same problem that is solved by not having to type parens around the 
>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>> months and got very comfortable with just typing the if conditional and 
>> hitting return, without any extra syntax. When I came back to Python, I 
>> found that I felt annoyed every time I typed the colon, since it 
>> obviously isn't required. The FAQ says that the colon increases 
>> readability, but I'm skeptical. The indentation seems to provide more 
>> than enough of a visual clue as to where the if conditional ends.
> 
> I'm not sure why '\'s are required to do multi-line before the colon.

Special cases aren't special enough to break the rules.

Georg


From sjmachin at lexicon.net  Wed Nov 22 00:00:02 2006
From: sjmachin at lexicon.net (John Machin)
Date: 21 Nov 2006 21:00:02 -0800
Subject: Is there a list comprehension for this?
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>
Message-ID: <1164171602.525542.56750@f16g2000cwb.googlegroups.com>

Steven D'Aprano wrote:

[snip]

> def running_sum(dw):
>     """Return a list of the running sums of sequence dw"""
>     rs = [0]*len(dw)
>     for i in range(len(dw)):
>         rs[i] = dw[i] + rs[i-1]

Please explain to the newbies why there is no exception raised when
rs[i-1] is executed for i == 0, and state whether you consider this is
a Good Idea or a Filthy Trick or a Fortunate Accident.

>     return rs
>
> It isn't a one-liner, but it is clear, the name is self-documenting, it
> has a doc-string, you don't have to copy-and-paste code every time you
> want to use it, and now that you've defined it once, you can use it as a
> one-liner as many times as you like.
> 
> >>> running_sum(range(5)):
> [0, 1, 3, 6, 10]



From sjmachin at lexicon.net  Sat Nov 18 18:05:38 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 15:05:38 -0800
Subject: print with variable justification (with *)
In-Reply-To: <mailman.443.1163890027.32031.python-list@python.org>
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
	<mailman.438.1163884150.32031.python-list@python.org>
	<1163889500.346015.214830@m73g2000cwd.googlegroups.com>
	<mailman.443.1163890027.32031.python-list@python.org>
Message-ID: <1163891138.094803.321690@m7g2000cwm.googlegroups.com>


tom wrote:
> John Machin wrote:

> > Not quite so many folks come to Python with a background in C these
> > days. Is anyone aware of a tutorial that covers % formatting from a
> > standing start?
> If you're on a unix system you can probably do `man fprintf`, but it
> will mean wading through a lot of stuff you're no interested in.  This
> has a good little section on it though, specifically for python
>
> http://rgruet.free.fr/PQR24/PQR2.4.html
>

Well done, tom, you've redeemed yourself! Those formatting examples are
just the ticket. I used that quick reference years ago when I started
out with Python, but I wasn't aware that it was still maintained, and
an advertisement for CSS as well. Bonus!

Cheers,
John



From fredrik at pythonware.com  Sun Nov 26 11:52:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 17:52:47 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <200611261804.54669.mgiann@beta-cae.gr>
References: <200611261804.54669.mgiann@beta-cae.gr>
Message-ID: <ekcgov$lu1$1@sea.gmane.org>

Michalis Giannakidis wrote:

> Could someone please explain the reasoning/behabiour of these?

in general, methods on C objects are implemented in terms of operations 
on the internal data structures, not in terms of a subset of the methods 
already provided by the object.

</F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Nov 14 15:28:44 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 14 Nov 2006 21:28:44 +0100
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
Message-ID: <4run7sFskcrrU1@mid.individual.net>

walterbyrd wrote:

> - PHP has a lower barrier to entry

Which kind of barrier do you mean -- syntax, availability, ...?

Also from what I know of PHP, language and API seem more unstable
and inhomogenous. CMIIW.

Regards,


Bj?rn

-- 
BOFH excuse #219:

Recursivity.  Call back if it happens again.



From paul at boddie.org.uk  Thu Nov 16 09:59:09 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 06:59:09 -0800
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au> <4s38t9Ftln2aU1@mid.uni-berlin.de>
Message-ID: <1163689149.613418.40020@b28g2000cwb.googlegroups.com>

Diez B. Roggisch wrote:
>

[Multiplayer game servers]

> Now how exactly does linux (or any other resource limiting technique on any
> OS) help here - killing the whole game server surely isn't a desirable
> solution when one player goes berserk, might it be intentionally or not.

A significant issue is the architecture of the server itself. Is a
per-process solution acceptable or must everything happen in the same
process with lots of threads (or microthreads)? Of course, there are
games using lots of microthreads, although I'm not sure whether they
also use lots of processes, too, and it has been asserted that having
lots of operating system threads or processes is just too resource
intensive, but I think it's especially worth considering the nature of
the platform you're using and what it offers.

Presumably, the original idea with UNIX-based systems was that you'd
employ lots of processes in order to serve lots of customers, players,
and so on, and there were companies like Internet service providers
using precisely that one process per customer model in a naive fashion
(until they exceeded the limit on simultaneous process identifiers in
one particular case, I believe). Subsequent work focusing on throwing
lots of threads into a single server-side container and then trying to
isolate them from each other, all whilst running the container on a
UNIX variant - a classic Java architectural pattern - seems like a
curious distraction when one considers the strong portfolio of
appropriate and readily available technologies that are left unused in
the operating system of the deployment environment concerned.

> It is a recurring and pretty much understandable request on c.l.py to be
> able to do so - sometimes it arises in the disguise of killable threads.
> But unfortunately the solution doesn't seem to be as simple as one would
> wish.

And this is where the hot topics collide: people want performant
multitasking with lots of shared state (the global interpreter lock
controversy) together with sandboxing so that the individual threads
can't access most of that shared state (the restricted execution
controversy). But it's like using a trip to meet the neighbours to
justify a mission to the moon: you can visit the neighbours at a much
lower cost with the vehicles you already have. I hear that various
operating systems support better interprocess communication these days,
but then we meet the third hot topic: why won't it work on Windows?
Something has to give.

Paul



From chris.cavalaria at free.fr  Thu Nov  9 05:38:46 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Thu, 09 Nov 2006 11:38:46 +0100
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
Message-ID: <45530513$0$25102$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> There is also PyQT which we wrote off as we wanted to write commercial
> applications too.  As it happens we have a commercial QT licence, but
> we decided we didn't want to have to incurr the additional expense of
> renewing it.
Note: Nothing in the GPL prevents you from writting commecial software ;)


From ronrsr at gmail.com  Fri Nov 17 02:01:39 2006
From: ronrsr at gmail.com (ronrsr)
Date: 16 Nov 2006 23:01:39 -0800
Subject: determining the bounds of a tuple returned from a database
In-Reply-To: <mailman.308.1163746322.32031.python-list@python.org>
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
	<1163744646.708954.271010@f16g2000cwb.googlegroups.com>
	<mailman.308.1163746322.32031.python-list@python.org>
Message-ID: <1163746899.262327.72100@h48g2000cwc.googlegroups.com>

very sorry, that was my error - len(result[0]) and len(result[1]) both
return 1 --

i think I'm misunderstanding what len() does - to me they appear to
have 2 or 3 elements, or at least be composed of a string of some
length.

I guess len() isn't the function i'm looking for then.  How do I tell
how many strings, or how many bytes are in each dimension?  so that I
can iterate through them.

Each entry in that list is a keyword - Alternately, is there any fast
way to parse that into a sorted list of distinct keywords.

very sorry for the error.

bests,

-rsr-

Fredrik Lundh wrote:
> ronrsr wrote:
>
> > it looks like the  len() function is the one I want.
> >
> > for:   len(result) - i get 248,
> >
> > but for len(result[0]) or len(result[1]) i always get 0.
>
> that's a bit surprising, because both items are tuples that contain
> exactly one item:
>
> >> (('Agricultural subsidies; Foreign aid',), ('Agriculture; Sustainable
> >> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> >> Development, Birth Defects; Toxic Chemicals',),
> 
> </F>



From arkanes at gmail.com  Fri Nov 24 08:56:22 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Fri, 24 Nov 2006 07:56:22 -0600
Subject: Abelson and Python
In-Reply-To: <4565c7f6$1@nntp0.pdx.net>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
	<mailman.625.1164269712.32031.python-list@python.org>
	<1164281565.180846.232360@k70g2000cwa.googlegroups.com>
	<4565c7f6$1@nntp0.pdx.net>
Message-ID: <4866bea60611240556p4d9b3a85hd2a19ecf1cf2d2d6@mail.gmail.com>

On 11/23/06, Scott David Daniels <scott.daniels at acm.org> wrote:
> markscottwright wrote:
> > Fredrik Lundh wrote:
> >> markscottwright wrote:
> >>
> >>  > If it were that easy, the PyPy guys would be done by now.
> >>
> >> if the PyPy guys had focused on writing a Python interpreter in Python,
> >> they'd been done by now.
> >>
> >> </F>
> >
> > Isn't that the point of PyPy?  It's what their mission statement says
> > (http://codespeak.net/pypy/dist/pypy/doc/architecture.html#mission-statement):
> >
> > "PyPy is an implementation of the Python programming language written
> > in Python itself, flexible and easy to experiment with."
> >
> > This is something that is amazingly easy to do in scheme, since the
> > language is so simple, but is typically pretty difficult to do in other
> > languages....
> >
> > That said, I see now that the course we're talking about isn't the same
> > as the old 6.001 course, and presumably has different pedagogical goals.
> >
> There are a more than a few library functions in the Python code that
> are written in C in CPython.  Not only is PyPy trying to get the
> _entire_ Python system into Python, it is trying to do so in a
> friendly-to-translation-in-a-statically-typed-language way.
>
> Besides, if you can freely use "eval" and "exec", how hard is a pure
> python language interpreter?
>

It's pretty trivial, and thats why I've always been unimpressed by
"implemente a <x> language interpreter in <y> lines" type statements.
It's a cute toy but what's the real learning  opportunity there?

Now, writing a compiler/interpreter from the ground up is a more
valuable experience, but does it really matter if the language is the
same one you wrote the compiler in? It gets harder the more
complicated the syntax and semantics of the language are, but, say,
python 1.0 would probably be a suitable goal for coursework.


From gagsl-py at yahoo.com.ar  Wed Nov  8 21:19:48 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 23:19:48 -0300
Subject: Using Python from Cocoa App via PyObjc - numbers dont
  match...
In-Reply-To: <1163035378.654266.287360@m73g2000cwd.googlegroups.com>
References: <1163035378.654266.287360@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108231137.05ab7c10@yahoo.com.ar>

At Wednesday 8/11/2006 22:22, sapsi wrote:

>I managed to create a python class and instantiate that from my
>Objective C Cocoa App (its not a python app). [...]
>The first output in the console is 40.4 and the second
>-40.40000152587891.
>
>If i change the NSLog(s)  to "%f",[n floatValue] (and the second
>likewise) the first is 40.400002 and the second is -40.400002.
>
>Why does this happen?

This is mostly independent on the language in use.
Numbers like 40.4 don't have, in general, an exact binary representation.
See http://docs.python.org/tut/node16.html


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From http  Tue Nov 14 06:26:47 2006
From: http (Paul Rubin)
Date: 14 Nov 2006 03:26:47 -0800
Subject: Random image text generation?
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xslgmxo94.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> Instead of displaying an obfuscated image of a nonsense word, display six
> randomly chosen photos, where five are of the same thing but not the same
> image. E.g. you might show five different kittens and a horse. The user
> has to click on the image that is not the same as the others.
> State-of-the-art horse-recognition software is not yet in widespread use
> by spammers *wink*

No need to recognize the horse.  Just pick one of the pictures at
random and you'll get the right one 1/6th of the time.  Repeat ad
infinitum--they're spammers and like to repeat stuff after all.
That's why those conventional captcha images make you recognize a
multi-character string: so the guessing chance is low.


From ptmcg at austin.rr._bogus_.com  Wed Nov  1 11:26:31 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 01 Nov 2006 16:26:31 GMT
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
Message-ID: <XU32h.436$lx6.417@tornado.texas.rr.com>

"Neil Cerutti" <horpner at yahoo.com> wrote in message 
news:slrnekhbru.1as.horpner at FIAD06.norwich.edu...
> The Glk API (which I'm implementing in native Python code)
> defines 120 or so constants that users must use. The constants
> already have fairly long names, e.g., gestalt_Version,
> evtype_Timer, keycode_PageDown.
>
> Calls to Glk functions are thus ugly and tedious.
>
>    scriptref = glk.fileref_create_by_prompt(
>            glk.fileusage_Transcript | glk.fileusage_TextMode,
>            glk.filemode_WriteAppend, 0)
>
> Please give me some good style advice for this situation.
>
> I know some modules are designed to be used as 'from XXX import
> *'. Since the Glk API is heavily influenced by its inception in
> C this might not be a huge problem. All the functions in the API
> have glk_ prepended, since C has no namespaces. I think it makes
> sense to stick the glk_'s back on the functions and instruct
> users to 'from Glk import *', but I know it doesn't conform with
> Python practice, and Python has plenty of modules that were
> originally designed in C, but don't insist on polluting the
> global namespace.
>

Neil -

I recently had to add some new constants to pyparsing, representing LEFT and 
RIGHT, but I didn't want to define such generic and 
likely-to-collide-with-user-code variable names.

I settled on defining my own flavor of the Bag class, which I named 
Constants since it is there specifically to define constants (although it 
does nothing to enforce the "constant-ness" of the values).

class Constants(object)
    pass

(I guess value immutability could probably be implemented using clever 
implementations of __setattr__ and such, but is it really worth the 
bother?).

Then I defined the context for my LEFT and RIGHT constants, which are being 
created to specify operator associativity, and then my constant fields as 
attributes of that object:

opAssoc = Constants(object)
opAssoc.RIGHT = 0
opAssoc.LEFT = 1

In client modules (that is, those that import your library) that don't like 
"from pyparsing import *", they can just add opAssoc to the list of imported 
names (as in "from pyparsing import opAssoc"), and all of the related 
constant definitions come along for the ride.

In your example, this would look something like:

fileusage = Constants()
fileusage.Transcript = 1
fileusage.TextMode = 2

filemode = Constants()
filemode.Read = 1
filemode.Write = 2
filemode.Append = 4
filemode.WriteAppend = filemode.Write | filemode.Append

and so on.  In the client modules they would simply enter "from glk import 
fileusage, filemode".  Or if they just "import glk", the references to the 
constants look like "glk.filemode.Append", "flk.fileusage.TextMode", etc., 
and those garish and unsightly '_' separators are reduced to svelte little 
'.'s.

I think this is a reasonable compromise in avoiding namespace pollution, 
without inflicting unseemly text entry overhead on your module clients.

-- Paul




From IloChab at yahoo.it  Sat Nov  4 07:02:26 2006
From: IloChab at yahoo.it (IloChab)
Date: Sat, 04 Nov 2006 13:02:26 +0100
Subject: Really strange behavior
Message-ID: <pan.2006.11.04.12.02.26.532144@yahoo.it>

Sorry I wasn't able to be more specific on my topic but I really do not
know how to classify my  problem, I mean that I can't understand if it's 
a python
or a twisted
or a Qt4
problem
I'm trying to run a simple application with Twisted and Qt4. 
To do this I downloaded this:
    http://twistedmatrix.com/trac/attachment/ticket/1770/qt4reactor.py
Now,
if I run this:
# >>>>>>>>>
import  qt4reactor
import sys
from PyQt4 import  QtGui
from winIum import Window

def main():
    app = QtGui.QApplication(sys.argv)
    qt4reactor.install(app)
    MainWindow = QtGui.QMainWindow()
    win = Window(MainWindow)
    MainWindow.show()
    from twisted.internet import reactor
    reactor.run()
# <<<<<<<<
my window shows and run correctly.

If I run this:
# >>>>>>>>>>>>>
import  qt4reactor
import sys
from PyQt4 import  QtGui
from winIum import Window

def creApp():
    app = QtGui.QApplication(sys.argv)
    qt4reactor.install(app)
    retrun app
def creWin():
    MainWindow = QtGui.QMainWindow()
    win = Window(MainWindow)
    MainWindow.show()
def main():
    app = creApp()
    creWin()
    from twisted.internet import reactor
    reactor.run()
# <<<<<<<<<<<<<
my window doesn't show and the script doesn't stop but remains trapped in
some gui loop.
 
What's the problem I can't see??

Thank you in advance for any help.
Licia


From aj108778 at gmail.com  Sat Nov 11 18:40:45 2006
From: aj108778 at gmail.com (Doug)
Date: 11 Nov 2006 15:40:45 -0800
Subject: explicit self revisited
In-Reply-To: <mailman.2110.1163283825.11739.python-list@python.org>
References: <ej5fuv$a4a$1@online.de><ej5i3k$6l3$1@sea.gmane.org>
	<mailman.2110.1163283825.11739.python-list@python.org>
Message-ID: <1163288444.893136.42030@h54g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> Fredrik Lundh wrote:
> > cannot all you clueless trolls who cannot think of a single useful thing
> > to contribute to Python start your own newsgroup?
>
> and before anyone complains; please note that they're working through
>
>      http://www.effbot.org/pyfaq/design-index.htm

That site is a bunch of FUD -
The explicit self is there simply because OOP was tacked onto python as
an afterthought.
Why not just be honest about it.  It's too late to change Python's
syntax.  It just means a little extra typing.  If it really bothers
someone, use "s" instead of "self" or else use Ruby.



From eric_brunel at despammed.com  Mon Nov  6 04:18:09 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Mon, 06 Nov 2006 10:18:09 +0100
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<453e3c5a$0$23254$426a74cc@news.free.fr>
	<mailman.1094.1161707865.11739.python-list@python.org>
	<453f18a6$0$21544$426a74cc@news.free.fr>
	<mailman.1154.1161764419.11739.python-list@python.org>
	<453f28b7$0$23797$426a74cc@news.free.fr>
Message-ID: <op.tik74jebrqur0o@eb.pragmadev>

On Wed, 25 Oct 2006 11:04:57 +0200, Christophe <chris.cavalaria at free.fr>  
wrote:
>>> And no modern layout manager available. Only those old school  
>>> left/right/up/down pack and anchors are available.
>>  huh?  when did you last look at Tk?  1994?
> Yesterday. In fact, I could find no mention at all of layout managers  
> others than those working with anchors. Anchors are soooo old school  
> nowadays :)

Being "old school" or "modern" is not an argument in itself. How do the  
so-called "modern" layout managers help you do the thing you want to do?

And the fact that you could find no mention of something does not mean  
that it doesn't exist. It may just be a documentation problem.

> Honestly, I can't stand using anchors or the Packer anymore. The systems  
> used in wx, Qt are much better. Use them once and you cannot live  
> without them anymore.

The "Packer" is very rarely used in Tkinter applications when the layout  
becomes complicated. Almost all applications I saw use the "grid" layout  
manager, except for very simple things (like buttons in a row or column,  
where the "pack" layout manager is just enough).
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From dakman at gmail.com  Thu Nov  9 13:14:16 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 9 Nov 2006 10:14:16 -0800
Subject: Lists of lists and tuples, and finding things within them
In-Reply-To: <mailman.1986.1163095615.11739.python-list@python.org>
References: <1163079978.5053.32.camel@pepper>
	<mailman.1986.1163095615.11739.python-list@python.org>
Message-ID: <1163096056.434360.56160@h48g2000cwc.googlegroups.com>

<LameJoke>
 Thanks Captain Obvious!
</LameJoke>
Daniel Nogradi wrote:
> > I have a program that keeps some of its data in a list of tuples.
> > Sometimes, I want to be able to find that data out of the list.  Here is
> > the list in question:
> >
> > [('password01', 'unk'), ('host', 'dragonstone.org'), ('port', '1234'),
> > ('character01', 'Thessalus')]
> >
> > For a regular list, I could do something like x.index('host') and find
> > the index of it, but I don't know how to do this for a tuple where the
> > data item isn't known in advance.  For example, I want to get the "host"
> > entry from the list above; but I can only retrieve it if I know what it
> > contains (e.g., x.index(('host', 'dragonstone.org'))).
> >
> > Is there a better way to do this than a construct similar the following?
> >
> > for key, value in x:
> >     if key == 'host':
> >         print value
> >
>
> If I were you I would use a dictionary for such a thing:
>
> mydict = dict( password01='unk', host='dragonstone.org', port='1234',
> character01='Thessalus' )
>
> And then you would look up host by:
> 
> mydict[ 'host' ]
> 
> HTH,
> Daniel



From ptmcg at austin.rr._bogus_.com  Fri Nov 24 11:59:46 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 24 Nov 2006 16:59:46 GMT
Subject: Local variables persist in functions?
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <6yF9h.2260$_H5.1046@tornado.texas.rr.com>

<120psi at gmail.com> wrote in message 
news:1164355869.607182.278200 at l12g2000cwl.googlegroups.com...
> I'm a bit baffled.  Here is a bit of fairly straightforward code:
>
> def _chunkify( l, chunkSize, _curList = list() ):
>    print _curList   # yay for printf debugging

Check out Winpdb at http://www.digitalpeers.com/pythondebugger/.

-- Paul




From rtw at freenet.co.uk  Wed Nov  1 15:12:07 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 14:12:07 -0600
Subject: Where do nested functions live?
References: <Xns986E6E3BBB3B2rtwfreenetREMOVEcouk@216.196.109.145>
	<mailman.1613.1162403556.11739.python-list@python.org>
Message-ID: <Xns986ECD9088F17rtwfreenetREMOVEcouk@216.196.109.145>

Frederic Rentsch wrote in news:mailman.1613.1162403556.11739.python-
list at python.org in comp.lang.python:

> Since we have a class that goes out of scope 
> when the function returns, and we don't need more than one instance, why 
> bother to make an instance? Why not use the class object itself?

Because you hadn't yet pointed this out to me :-).

Thanks

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From rupole at hotmail.com  Tue Nov  7 21:17:45 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 7 Nov 2006 21:17:45 -0500
Subject: More elegant way to obtain ACLs / permissions for windows
	directories than using "cacls" dos command?
References: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>
Message-ID: <1162952479_41619@sp6iad.superfeed.net>


dananrg at yahoo.com wrote:
> Is there a standard library module in Python 2.4 (Win32) that will
> return directory permissions / ACLs (e.g. users, groups, and what
> rights they have)?
>
> Otherwise, I'm faced with sending "cacls dirName" commands via os.popen
> as below, and then parsing and comparing the text output.
>
> Basically, I'd like to compare what the ACLs a directory should have
> against what the actual ACLs are.
>
> Here's what I started with:
>
> import os           # Cross-platform filesystem manipulation
>
> rootDir = "S:\someRootDirectoryHere"
>
> print "*** Printing DIRECTORY names beneath directory " + rootDir + "
> ***\n"
> for dirpath, dirnames, filenames in os.walk(rootDir):
>    for dirNm in dirnames:
>        theDirPath = os.path.join(dirpath, dirNm)
>        print '"' + theDirPath +'"'
>        # cacls needs double-quotes around space-containing paths
>        result = os.popen("cacls " + '"' + theDirPath + '"')
>        # Print the security info (ACLs)for specified directory
>        print result.read()
>
> Thanks.

The win32security module from Pywin32 wraps the functions used to
read and change security descriptors.

                Roger





----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From multani at free.fr  Tue Nov 21 17:03:57 2006
From: multani at free.fr (Jonathan Ballet)
Date: Tue, 21 Nov 2006 23:03:57 +0100
Subject: Note about getattr and '.'
References: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
Message-ID: <20061121230357.71abe4b2@localhost.localdomain>

Le 21 Nov 2006 13:21:52 -0800,
szport at gmail.com a ?crit :

> There is an interesting skewness in python:
> 
> class A(object): pass
> 
> >>> a=A()
> >>> setattr(a, '$foo', 17)
> >>> getattr(a, '$foo')
> 17
> 
> But I can't write 
> >>> a.'$foo'
> 

Well, you can even do :

>>> class A(object): pass
...
>>> a = A()
>>> setattr(a, 'some.attr', 15)
>>> a.some.attr
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'A' object has no attribute 'some'
>>> getattr(a, 'some.attr')
15
>>>

Which is a lot funnier IMHO :)

 - Jon


From john106henry at hotmail.com  Wed Nov  8 15:37:20 2006
From: john106henry at hotmail.com (John Henry)
Date: 8 Nov 2006 12:37:20 -0800
Subject: decorators
Message-ID: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>

I must be very thick.  I keep reading about what decorators are and I
still don't have a good feel about it.  See, for example:

http://alex.dojotoolkit.org/?p=564

and:

http://soiland.no/software/decorator

What exactly do I use decorators for?



From fredrik at pythonware.com  Sun Nov 12 12:36:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 18:36:17 +0100
Subject: explicit self revisited
In-Reply-To: <1163351573.3497.26.camel@localhost.localdomain>
References: <ej5fuv$a4a$1@online.de>	<mailman.2110.1163283825.11739.python-list@python.org>	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>	<mailman.2119.1163289905.11739.python-list@python.org>	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>
	<1163351573.3497.26.camel@localhost.localdomain>
Message-ID: <ej7m2l$tsm$1@sea.gmane.org>

Carsten Haese wrote:

> According to that definition, FUD is "a sales or marketing strategy of
> disseminating negative (and vague) information on a competitor's
> product."

Doug "cheddar cheese" Holton (who has a long history of posting 
seriously confused and/or abusive stuff under a number of aliases) is
a developer of a "competing" language named Boo.

I suppose that in his view, language advocacy is a zero-sum game, so 
positive comments about Python can be considered as FUD against his own 
project.  He's even invented his own del.icio.us tag for this purpose:

     http://del.icio.us/tag/pythonfud

</F>



From inyeol.lee at siliconimage.com  Wed Nov  1 16:46:41 2006
From: inyeol.lee at siliconimage.com (Inyeol Lee)
Date: Wed, 1 Nov 2006 13:46:41 -0800
Subject: scared about refrences...
In-Reply-To: <1162412436.595926.66940@i42g2000cwa.googlegroups.com>
References: <1162236136.367603.165180@b28g2000cwb.googlegroups.com>
	<1162251429.386255.289620@e3g2000cwe.googlegroups.com>
	<4547d0d7$0$7246$426a34cc@news.free.fr>
	<1162412436.595926.66940@i42g2000cwa.googlegroups.com>
Message-ID: <20061101214641.GB475@siliconimage.com>

On Wed, Nov 01, 2006 at 12:20:36PM -0800, SpreadTooThin wrote:
> 
> Bruno Desthuilliers wrote:
> > Nick Vatamaniuc a ?crit :
> > (snip)
> > > In  Python all the primitives are copied and all other entities are
> > > references.
> >
> > Plain wrong. There's no "primitives" (ie : primitive data types) in
> > Python, only objects. And they all get passed the same way.
> 
> so..
> def fn(x):
>    x = x + 1
>    print x
> 
> a = 2
> fn(a)
> fn(2)
> 
> Wouldn't you say that this is being passed by value rather than by
> refrence?
> 

What you're confused with is assignment. Check this example;

    >>> def f(x):
    ...     print id(x)
    ...     x = x + 1
    ...     print id(x)
    ... 
    >>> f(1234)
    1617596
    1617608
    >>> a = 5678
    >>> id(a)
    1617596
    >>> f(a)
    1617596
    1617620
    >>>

You can assume id() as a memory address. Is it call-by-value?

-- Inyeol Lee


From inq1ltd at verizon.net  Sat Nov  4 15:39:16 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sat, 04 Nov 2006 15:39:16 -0500
Subject: disabledforeground or similar for Entry (in Tkinter)
In-Reply-To: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
References: <1162656214.176092.46530@f16g2000cwb.googlegroups.com>
Message-ID: <200611041539.16898.inq1ltd@verizon.net>

On Saturday 04 November 2006 11:03, Dustan wrote:
> Back in this post, I attempted to make a label
> look like a button:
> http://groups.google.com/group/comp.lang.python
>/browse_thread/thread/a83195d3970a6851/2053cbaec
>1bc1f19?auth=DQAAAHkAAAAMDAWnhNnzpuKlwOKZUwAGUTt
>T2Ay-EAB7rCY6SnwfnDzZ98M37bZDW2Is0LrBVrr8XEgPfcu
>OkiUE-CrSsKbBSX-67voDUXfbATBd0eYNMClezby4EXT2fuL
>m6f0llJ_xMO8BfkjVho_7CZvlf_9tNGnJixTbq8zr21ODZBh
>ouQ
>
> Alright, I've learned my lesson - don't use a
> new widget; modify the old one.
>
> Except the Entry widget doesn't have a
> disabledforeground option. Neither does the
> Text widget, but IDLE seems to accomplish
> making a disabled Text look the same as an
> enabled Text in the IDLE Help section.
>
> No, foreground (fg) and background (bg) don't
> make a difference; it still changes the color
> of the Entry widget upon disabling.
>
> There must be something I'm missing here...

Have you tried the state option ?

state = 'disabled'

It works for Text, Entry, and Button.  

Once disabled you won't be able to make changes 
until state= 'normal'

jim-on-linux

http://www.inqvista.com


From icetortoise at gmail.com  Thu Nov 23 07:53:54 2006
From: icetortoise at gmail.com (Andy)
Date: 23 Nov 2006 04:53:54 -0800
Subject: How do I find possible matches using regular expression?
In-Reply-To: <ek3umo$4m5$03$1@news.t-online.com>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
	<ek3umo$4m5$03$1@news.t-online.com>
Message-ID: <1164286433.937425.301490@j44g2000cwa.googlegroups.com>

The seems good to me, I'll try it out, thanks for the posting.


"Peter Otten ???
"
> Andy wrote:
>
> > I'm trying to do some predicting work over user input, here's my
> > question:
> >
> > for pattern r'match me', the string 'no' will definitely fail to match,
> > but 'ma' still has a chance if user keep on inputting characters after
> > 'ma', so how do I mark 'ma' as a possible match string?
>
> The following may or may not work in the real world:
>
> import re
>
> def parts(regex, flags=0):
>     candidates = []
>     for stop in reversed(range(1, len(regex)+1)):
>         partial = regex[:stop]
>         try:
>             r = re.compile(partial + "$", flags)
>         except re.error:
>             pass
>         else:
>             candidates.append(r)
>     candidates.reverse()
>     return candidates
>
> if __name__ == "__main__":
>     candidates = parts(r"[a-z]+\s*=\s*\d+", re.IGNORECASE)
>     def check(*args):
>         s = var.get()
>         for c in candidates:
>             m = c.match(s)
>             if m:
>                 entry.configure(foreground="#008000")
>                 break
>         else:
>             entry.configure(foreground="red")
>
>
>     import Tkinter as tk
>     root = tk.Tk()
>     var = tk.StringVar()
>     var.trace_variable("w", check)
>     entry = tk.Entry(textvariable=var)
>     entry.pack()
>     root.mainloop()
>
> The example lets you write an assignment of a numerical value, e. g
>
> meaning = 42
>
> and colours the text in green or red for legal/illegal entries.
> 
> Peter



From gagsl-py at yahoo.com.ar  Wed Nov  8 21:22:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 23:22:56 -0300
Subject: substring search without using built in utils
In-Reply-To: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
Message-ID: <7.0.1.0.0.20061108232037.05ac4cb0@yahoo.com.ar>

At Wednesday 8/11/2006 22:29, zeal elite wrote:

>I am looking for substring search python program without using the 
>built in funtions like find, or 'in'.

The only reasonable usage for such a constraint would be a school 
assignment so: don't cheat and do your homework!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From claird at lairds.us  Sun Nov 12 08:30:15 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 12 Nov 2006 13:30:15 +0000
Subject: Help with gateway
Message-ID: <78kj24-pto.ln1@lairds.us>

Who knows and/or manages bag.python.org?  My e-mail server
and the clp gateway are having a configuration disagreement
that I'd like to solve.  Please e-mail me privately.

I'll report back to the group as appropriate.


From tim at tdw.net  Thu Nov  9 05:26:35 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 9 Nov 2006 10:26:35 +0000
Subject: help using smtplib to work ..
In-Reply-To: <B57142370.803.19370.1@mxextra>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<mailman.1940.1163027412.11739.python-list@python.org>
	<B57142370.803.19370.1@mxextra>
Message-ID: <9afea2ac0611090226s7a083de2xa92f3aecdcdf7cb9@mail.gmail.com>

On 8 Nov 2006 19:45:00 -0800, Jordan <jordan.taylor2 at gmail.com> wrote:

>  For some reason,
> smtp for gmail seems to require that you call server.ehlo() a second
> time, after having called server.starttls(), otherwise, the server
> won't accept authorization.  Thanks.

Not just GMAIL,  all (RFC Compliant) SMTP servers require a 2nd EHLO
after a successful STARTTLS command.

The list of returned options / available commands will usually be
different for the 2nd EHLO.  Often this will just mean the removal of
the STARTTLS option, but sometimes there can be additional
functionality offered.

HTH :)


From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 10:26:58 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 15:26:58 GMT
Subject: forwarding *arg parameter
Message-ID: <6pn3h.125$7b6.98@read3.inet.fi>

 >>> def g(*arg):
...     return arg
...
 >>> g('foo', 'bar')
('foo', 'bar')
 >>> # seems reasonable
...
 >>> g(g('foo', 'bar'))
(('foo', 'bar'),)
 >>> # not so good, what g should return to get rid of the outer tuple

TV


From jlicht at gmail.com  Wed Nov  8 04:08:57 2006
From: jlicht at gmail.com (jlicht at gmail.com)
Date: 8 Nov 2006 01:08:57 -0800
Subject: E-Commerce Partner Program
Message-ID: <1162976937.184245.98750@h48g2000cwc.googlegroups.com>

Just thought that I'd let you know that PricePlay.com has launched an
awesome Partner Program for all the E-Commerce developers.  All you
have to do is sign someone up and get paid.

http://www.priceplay.com/corporate/partners/incentive/signup.cfm



From jorge.vargas at gmail.com  Sat Nov  4 08:58:55 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sat, 4 Nov 2006 13:58:55 +0000
Subject: WSDL?
In-Reply-To: <pan.2006.11.04.13.50.50.713078@gmx.net>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
	<pan.2006.11.04.13.50.50.713078@gmx.net>
Message-ID: <32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>

On 11/4/06, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <mailman.1762.1162647487.11739.python-list at python.org>, Jorge Vargas
> wrote:
>
> > and please please don't go to corba we need to kill that.
>
> Have you real reasons or is this a religious thing?  As I see it Corba is
> much better supported by Python libs than SOAP is.
>
I see ZSI as a very good engine for SOAP as for xmlrpc it's "better"
since you can interact with a browser and then you can even have json
rpc.

but yes ur right is mostly because of religious reasons :)

> Ciao,
>         Marc 'BlackJack' Rintsch
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From pkarjala at paju.oulu.fi  Thu Nov 30 08:50:58 2006
From: pkarjala at paju.oulu.fi (Pekka Karjalainen)
Date: Thu, 30 Nov 2006 13:50:58 +0000 (UTC)
Subject: Remarkable results with psyco and sieve of Eratosthenes
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
Message-ID: <slrnemtoe2.oju.pkarjala@paju.oulu.fi>

In article <1164837289.295731.178070 at h54g2000cwb.googlegroups.com>,
Steve Bergman wrote:
>BTW, can this code be made any more efficient?

>def primes():
>    primes=[3]
>    for x in xrange(5,10000000,2):
>        maxfact = int(math.sqrt(x))
>        flag=True
>        for y in primes:
>            if y > maxfact:
>                break
[...]

You can omit the call to math.sqrt if you test this instead.

    y*y > x

in place of if y > maxfact: .

Pka



From paul at boddie.org.uk  Fri Nov 10 05:52:48 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Nov 2006 02:52:48 -0800
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<1163136947.735028.95160@m73g2000cwd.googlegroups.com>
	<1163138455.713334.204180@h48g2000cwc.googlegroups.com>
Message-ID: <1163155968.356530.273340@f16g2000cwb.googlegroups.com>

Ray wrote:
> p.lavarre at ieee.org wrote:
>
> > Jython exists.
>
> And Pava (or Pyava) doesn't, you mean?

Proof of concept only: http://www.boddie.org.uk/python/javaclass.html

If there were any really compelling libraries for Java that really had
to be available for CPython programs, I'd probably have worked around
the "platform issues" mentioned in the above document by now. However,
most people should just use Jython if they want Python and Java
interoperability, and gcj if they want to write Java for use with
CPython (just as the PyLucene people have done).

Paul



From cyberco at gmail.com  Mon Nov 20 06:01:43 2006
From: cyberco at gmail.com (cyberco)
Date: 20 Nov 2006 03:01:43 -0800
Subject: fileinput.input('test.txt') => ERROR: input() already active
In-Reply-To: <1164018218.422003.286870@h54g2000cwb.googlegroups.com>
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>
	<ejrqnb$5o3$02$1@news.t-online.com>
	<1164016727.678036.225640@e3g2000cwe.googlegroups.com>
	<1164018218.422003.286870@h54g2000cwb.googlegroups.com>
Message-ID: <1164020503.611469.71310@h54g2000cwb.googlegroups.com>

> > Please don't use lowercase "L" as a variable name;

Ohoh...I plead guilty! I totally forgot about CS 101... :)



From mgiann at beta-cae.gr  Tue Nov 28 09:31:38 2006
From: mgiann at beta-cae.gr (Michalis Giannakidis)
Date: Tue, 28 Nov 2006 16:31:38 +0200
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <Xns9888CD96B985AOKB@199.45.49.11>
References: <200611261804.54669.mgiann@beta-cae.gr>
	<mailman.779.1164656450.32031.python-list@python.org>
	<Xns9888CD96B985AOKB@199.45.49.11>
Message-ID: <200611281631.38692.mgiann@beta-cae.gr>

On Tuesday 28 November 2006 06:12, OKB (not okblacke) wrote:
> Carsten Haese wrote:
> > You can change the behavior of a list's sort method by overriding
> > sort. You can't change the behavior of sort by overriding
> > __getitem__ and __setitem__, because sort does not call __getitem__
> > or __setitem__.
>
>     	Why doesn't it?

I also expected that it did!

I perfectly understand that this adds significant penalty to the execution of 
code. But in the way things are, I have to know ( or guess ?) how its 
function has been implemented. And I cannot handle all cases the same.

If I provided my sort method for my class  in Python, wouldn't this call my 
__getitem__ and __setitem__ methods (considering l[i] = j assignment do)? Can 
this be considered an in consitency?

-- 
Michalis Giannakidis


From marc.wyburn at googlemail.com  Tue Nov  7 09:27:03 2006
From: marc.wyburn at googlemail.com (marc.wyburn at googlemail.com)
Date: 7 Nov 2006 06:27:03 -0800
Subject: sound processing modules in python - anyone?
In-Reply-To: <mailman.1820.1162850780.11739.python-list@python.org>
References: <mailman.4783.1162830903.11738.python-list@python.org>
	<mailman.1820.1162850780.11739.python-list@python.org>
Message-ID: <1162909623.472288.170500@i42g2000cwa.googlegroups.com>

I've had a brief look at this and there isn't a sound orientated
library as such.  You can however use numpy to do stuff like FFTs and
there are there is a wave module in python that will allow you to
create wavs, you can google for importing wav's into numpy arrays.
This seemed like a good idea to me as I think Numpy is written in C or
C++ (or maybe it was fortran).  There seem to be a lot of people using
numpy in a similar way to matlab so there is a fair ammount of the
standard DSP routines have already been written.


sittner at lkb.ens.fr wrote:
> Hi everyone,
> I'm looking for a module for sound processing (manipulating sound objets,
> filters, ffts etc.).
> I tried Snack, but when i downloaded the package that was supposed to be
> for python, there was only the Tk/Tcl stuff (where's the .py ?).
> could anyone help me with that (or with any other sound module for python)?
> thanks in advance,
> g



From CRhode at LacusVeris.com  Thu Nov 30 21:52:40 2006
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Thu, 30 Nov 2006 20:52:40 -0600
Subject: PythonTidy
In-Reply-To: <ekng6f$irr$1@sea.gmane.org>
References: <20061130024509.GA8961@loki> <ekng6f$irr$1@sea.gmane.org>
Message-ID: <20061201025240.GE799@loki>

Thomas Heller wrote this on Thu, Nov 30, 2006 at 09:50:25PM +0100.  My
reply is below.

> The two things that bother me at the moment are how the comments are
> formatted (dunno if that can be customized or changed easily), and
> it would be good if the script took command line args instead of
> working as a filter only.

Thank you for trying PythonTidy.

o Command-line args: Please give an example of a standard command that
I might emulate w.r.t. standard argument use.

o Comments: Input is parsed twice: I use *tokenize.generate_tokens* to
extract the comments and *compiler.parse* to generate the Abstract
Syntax Tree (AST).  Other applications usually use the AST to generate
bytecode, so it contains no information about comments.  The tokens
list identifies keywords (and comments and some whitespace) but
doesn't group them into statements.  I need both: comments *and*
functional grouping.  Fortunately both the AST and the tokens list
carry line numbers to reference the source.  Unfortunately the AST
line numbers are relative to functional groups and do not necessarily
apply to the particular keywords that introduce each group.  This
makes fixing the position of comments relative to reconstructed code a
bit of a challenge.  For example, when a comment has a line number in
the beginning/ending range of what would normally be considered one
command, I have to assume it is an inline comment regardless of how it
may have appeared in the original code.

Out-of-line comments should appear pretty much as they did in the
original code, however.  Can you provide an example where they do not?
Would you prefer that they be left justified or wrapped?  >-~

Doc strings (for modules, class declarations, and functions) are
another matter.  PythonTidy should not mess with them (unless
LEFTJUST_DOC_STRINGS is True).  They should appear exactly as
originally written.

I was taught that code ought to be self documenting and that comments
more often than not diminish readability by padding the code beyond
what can be comprehended on one page (screen).  I use them only
minimally and am not greatly inconvenienced when they are moved around
a little.

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 21? ? Wind N 8 mph


From __peter__ at web.de  Sat Nov 18 07:55:45 2006
From: __peter__ at web.de (Peter Otten)
Date: Sat, 18 Nov 2006 13:55:45 +0100
Subject: How can I speed this function up?
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <ejmvrl$bfb$02$1@news.t-online.com>

Chris wrote:

> So my question is how can I speed up what's happening inside the
> function write_data()? Only allowed to use vanilla python (no psycho or
> other libraries outside of a vanilla python install).

> def write_data1(out, data):
>      for i in data:
>          if i[0] is 'ELEMENT':
>              out.write("%s %06d " % (i[0], i[1]))
>              for j in i[2]:
>                  out.write("%d " % (j))
>              out.write("\n")

# reference, modified to avoid trailing ' '
def write_data(out, data):
    for i in data:
        if i[0] == 'ELEMENT':
            out.write("%s %06d" % (i[0], i[1]))
            for j in i[2]:
                out.write(" %d" % j)
            out.write("\n")

# Norvitz/Lundh
def writelines_data(out, data, map=map, str=str):
      SPACE_JOIN = ' '.join
      out.writelines(
         "ELEMENT %06d %s\n" % (i1, SPACE_JOIN(map(str, i2)))
               for i0, i1, i2 in data if i0 == 'ELEMENT'
         )

def print_data(out, data):
    for name, index, items in data:
        if name == "ELEMENT":
            print >> out, "ELEMENT %06d" % index,
            for item in items:
                print >> out, item,
            print >> out


import time

data = []
for i in range(500000):
     data.append(("ELEMENT", i, (1,2,3,4,5,6)))

for index, write in enumerate([write_data, writelines_data, print_data]):
    fname = "test%s.txt" % index
    out = open(fname,'w')
    start = time.time()
    write(out, data)
    out.close()
    print write.__name__, time.time()-start

for fname in "test1.txt", "test2.txt":
    assert open(fname).read() == open("test0.txt").read(), fname

Output on my machine:

$ python2.5 writedata.py
write_data 10.3382301331
writelines_data 5.4960360527
print_data 3.50765490532

Moral: don't forget about good old print. It does have an opcode(*) of its
own, after all.

Peter

(*) or two


From ronrsr at gmail.com  Mon Nov 13 14:40:04 2006
From: ronrsr at gmail.com (ronrsr)
Date: 13 Nov 2006 11:40:04 -0800
Subject: Printing database output in tabular form
Message-ID: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>

when I try to print a web table containing output from a database, I am
getting more info than I want- -

I would like this to print w'o the array('c',    AND I'd like the
control characters to print as HTML control chars.

array('c', '- "In the boom years of 1990-1997 developing countries paid
more in debt service than they received in new assistance."
\\r\\n\\r\\n- "Africa pays out $13.5 billion in debt service every
year." \\r\\n\\r\\n- "Africa spends four times as much on debt
repayment a')


Thanks very much for your assistance. 

bests, 

-rsr-



From __peter__ at web.de  Tue Nov 28 02:51:02 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 08:51:02 +0100
Subject: splitting a long string into a list
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
	<mailman.788.1164693655.32031.python-list@python.org>
	<1164698637.721659.169240@n67g2000cwd.googlegroups.com>
Message-ID: <ekgpnq$rr8$00$1@news.t-online.com>

ronrsr wrote:

> still having a heckuva time with this.

You don't seem to get it.

> here's where it stand - the split function doesn't seem to work the way
> i expect it to.
> 
> 
> longkw1,type(longkw):   Agricultural subsidies; Foreign
> aid;Agriculture; Sustainable Agriculture - Support; Organic
> Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> <type 'list'> 1
> 
> longkw.replace(',',';')

>>> sample = "eat, drink; man, woman"
>>> sample.replace(";", ",")
'eat, drink, man, woman'
>>> sample
'eat, drink; man, woman'

Aha, Python doesn't replace in place, it creates a new string instead.

> Agricultural subsidies; Foreign aid;Agriculture; Sustainable
> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> Development
> 
> 
>  kw = longkw.split("; ,")    #kw is now a list of len 1

>>> sample = "eat+-drink+man-woman"
>>> sample.split("+-")
['eat', 'drink+man-woman']
>>> sample.split("+")
['eat', '-drink', 'man-woman']

Aha, Python interprets the complete split() argument as the delimiter, not
each of its characters.

Do you think you can combine these two findings to make your code work? You
will have to replace() first and then split().

Peter


From nkanthikiran at gmail.com  Wed Nov 22 23:23:38 2006
From: nkanthikiran at gmail.com (k.i.n.g.)
Date: 22 Nov 2006 20:23:38 -0800
Subject: file backup in windows
In-Reply-To: <iP09h.2364$tM1.2116@newsread1.news.pas.earthlink.net>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
	<mailman.581.1164189748.32031.python-list@python.org>
	<1164196688.000016.25350@e3g2000cwe.googlegroups.com>
	<mailman.584.1164197445.32031.python-list@python.org>
	<1164198227.681869.132540@j44g2000cwa.googlegroups.com>
	<iP09h.2364$tM1.2116@newsread1.news.pas.earthlink.net>
Message-ID: <1164255818.774972.105700@l39g2000cwd.googlegroups.com>

Hi,

The following code has worked for me, I will continue from here to make
this further userfriendly.
More I would like to know how can i distribute my python code as self
installer package.
In the process of learning programming I would like take
OutlookBackup.py as my first project and learn accordingly. Please
guide me in this.

Once again thank you all of you for your valuable suggestions

Regards,
Kk
---------------------------------------------------------------------------------------------------
import os, sys ,shutil, win32file
import time
from win32com.shell import shell, shellcon

local_app_data = shell.SHGetSpecialFolderPath
(0,shellcon.CSIDL_LOCAL_APPDATA)
outlook_path = os.path.join (local_app_data, "Microsoft", "Outlook" )

# print outlook_path
#c:\documents and settings\060577\Local Settings\Application
Data\Microsoft\Outlook

source = outlook_path
#source = outlook_path +'\\*'
#print source

backup = 'D:\MailBackup'
backup1=r'D:\temp\outlook1'
backup2 =  'D:\MailBackup'
today = backup1 + '_'  + time.strftime ( '%Y-%m-%d')
now = time.strftime('%H.%M.%S')
target = today +'_'+ now
shutil.copytree(source, target) # copy directory tree

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



From jrpfinch at gmail.com  Thu Nov  9 07:30:27 2006
From: jrpfinch at gmail.com (jrpfinch)
Date: 9 Nov 2006 04:30:27 -0800
Subject: newbie class-building question
Message-ID: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>

I am constructing a simple class to make sure I understand how classes
work in Python (see below this paragraph).

It works as expected, except the __add__ redefinition.  I get the
following in the Python interpreter:

>>> a=myListSub()
>>> a
[]
>>> a+[5]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'str' object is not callable
>>>

Please could you let me know where I am going wrong.  I have hacked
around with the code and tried googling this error message but am
having difficulty finding the source of the problem.

Many thanks

Jon

class myList:
    def __init__ (self,value=[]):
        self.wrapped=[]
        for x in value :
            self.wrapped.append(x)
    def __repr__ (self):
        return `self.wrapped`
    def __getattr__ (self,attrib):
        return getattr(self.wrapped,attrib,'attribute not found')
    def __len__ (self):
        return len(self.wrapped)
    def __getitem__ (self,k):
        return self.wrapped[k]
    def __add__(self,other):
        return self.wrapped+other

class myListSub(myList):
    classCounter=0
    def __init__ (self,value=[]):
        self.instanceCounter=0
        myList.__init__(self,value)
    def __add__(self,other):
        myListSub.classCounter=myListSub.classCounter+1
        self.instanceCounter=self.instanceCounter+1
        myList.__add__(self,other)
    def getCounters (self):
        return "classCounter=%s instanceCounter=%s" %
(myListSub.classCounter,self.classCounter)



From jgodoy at gmail.com  Sun Nov 12 15:10:36 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 12 Nov 2006 18:10:36 -0200
Subject: Random image text generation?
References: <mailman.21.1163361663.32031.python-list@python.org>
Message-ID: <873b8obf43.fsf@gmail.com>

skip at pobox.com writes:

> Is there a module out there that will generate an image with a random text
> string such as the confirmation images you see on various websites?  I'm
> thinking I'm going to have to add that to the forms on the Mojam websites.
> Over the past couple weeks we've begun to get lots of spam submission crap.

http://captchas.net/sample/python/
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440588

There are specific implementations for Zope, TurboGears and other frameworks. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From danielkleinad at gmail.com  Sat Nov 18 08:52:21 2006
From: danielkleinad at gmail.com (Daniel Klein)
Date: Sat, 18 Nov 2006 13:52:21 GMT
Subject: Having trouble converting popen2 to subprocess
Message-ID: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>

Here's a c routine that prints a single line :

#include <stdio.h>
main()
{
  printf ("Hello World!\n");
}

And now the Python program (called 'po.py') that uses 'popen2' :

import popen2
(fin, fout) = popen2.popen2(r'c:\home\hw.exe', -1, 't')
print fin.readline()
fin.close()
fout.close()

When this is run it properly outputs the one line from the c routine :

C:\>python c:\python\po.py
Hello World!

Now here is my attempt to use the 'subprocess' module :

from subprocess import *
p = Popen(r'c:\home\hw.exe', bufsize=-1, stdin=PIPE, stdout=PIPE,
universal_newlines=True)
fin = p.stdin
print fin.readline()
fin.close()

When this is run, I get no output :

C:\>python c:\python\sp.py


C:\>

As you can see, I get no exception.

I've tried various combinations of the Popen arguments with no joy.

The platform is Windows XP Pro, so I did not try things like
'close_fds'.

What am I missing ?

Daniel Klein


From shejo284 at gmail.com  Tue Nov  7 15:43:09 2006
From: shejo284 at gmail.com (Sheldon)
Date: 7 Nov 2006 12:43:09 -0800
Subject: C wrapper
In-Reply-To: <mailman.1851.1162931420.11739.python-list@python.org>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
	<mailman.1851.1162931420.11739.python-list@python.org>
Message-ID: <1162932189.315088.58420@m7g2000cwm.googlegroups.com>


Hi,

> For a module called foo.c the initialization function must be called
> initfoo (*not* init_foo)

Ok, I fixed this part. Thanks


> And what are those non-static functions used for? The *only* purpose
> of your module should be to provide the Python bindings...

I wrote the C module to do some number crunching. Now I just need to
"connect" it to my python program. Should the initmsgpps_functions() be
the only function in the file? Then how do I "connect" my C module to
my Python program?

/Sheldon



From steve at REMOVE.THIS.cybersource.com.au  Tue Nov 28 07:24:12 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 28 Nov 2006 23:24:12 +1100
Subject: Modifying every alternate element of a sequence
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.28.12.23.59.538941@REMOVE.THIS.cybersource.com.au>

On Tue, 28 Nov 2006 02:38:09 -0800, jm.suresh at no.spam.gmail.com wrote:

> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
> 
> input = [1,2,3,4,5,6]
> wanted = [1,-2,3,-4,5,-6]
> 
> I can implement it like this:
> 
> input = range(3,12)
> wanted = []
> for (i,v) in enumerate(input):
>     if i%2 == 0:
>         wanted.append(v)
>     else:
>         wanted.append(-v)
> 
> But is there any other better way to do this.


Lots of ways.

Other people have given you some solutions. In my opinion, this is
the simplest method of all, if you want to modify input in place:

for i in range(1, len(input), 2):
    input[where] = -input[where]


Here's another method that only works if there are an even number of items:

A = input[0::2] # extended slicing
B = input[1::2]
B = [-x for x in B]
tmp = zip(A, B) # but watch out for odd number of items!
result = []
for t in tmp:
    result.extend(t)


Here's a third method:

factors = [(-1)**i for i in range(len(input))]
output = map(operator.mul, input, factors)


As for which is best, I leave that to you to decide.


-- 
Steven.



From mike at hobbshouse.org  Fri Nov 10 14:16:32 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Fri, 10 Nov 2006 13:16:32 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej2gp9$1qc$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<ej2gp9$1qc$1@sea.gmane.org>
Message-ID: <4554D010.4080408@hobbshouse.org>

Steve Holden wrote:
> Michael Hobbs wrote:
>   
>> Ben Finney wrote:
>>     
> [...]
>   
>>> A use case. What problem is being solved by introducing this
>>> inconsistency?
>>>   
>>>       
>> The same problem that is solved by not having to type parens around the 
>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>> months and got very comfortable with just typing the if conditional and 
>> hitting return, without any extra syntax. When I came back to Python, I 
>> found that I felt annoyed every time I typed the colon, since it 
>> obviously isn't required. The FAQ says that the colon increases 
>> readability, but I'm skeptical. The indentation seems to provide more 
>> than enough of a visual clue as to where the if conditional ends.
>>
>>     
> So you'd also like us to shorten the names of the builtins and the the 
> keywords? Why bother with "def" when we could just use "d", "class" when 
> we could just use "c"? Or *does* readability matter to some degree?
>
>   
Like I said in that paragraph, removing the colon wouldn't seem to 
degrade readability *that much*, if at all. Personally, even though I 
find typing the colon to be a small annoyance, that annoyance exceeds 
any improvement to readability that it might provide; especially 
considering that indentation sticks out like a big red sign saying the 
code block starts "HERE, HERE, HERE".

>> As far as using the FAQ as gospel, the FAQ also provides arguments for 
>> why there isn't a with statement or a switch statement. The with 
>> statement has already been implemented in 2.5 and there's a PEP to 
>> implement switch (3103).
>>
>>     
> But the "with" statement isn't the one that "with" was reserved for in 
> the FAQ, which is really talking about the same kind of "with" statement 
> that Visual Basic uses: an implied left operand for unary "." operations.
>
>   
Yeah, okay, I didn't read through the details of the PEP. I picked a bad 
example to illustrate a point that is still true. The FAQ also tries to 
argue that it's a Good Thing that join() is a string method, not a list 
method. It also tries to argue that there's a good reason that lists are 
different than tuples. I don't think it would surprising that many 
Python developers don't really buy those arguments either.

- Mike




From exarkun at divmod.com  Thu Nov  2 14:41:25 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Nov 2006 14:41:25 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <20061102191558.20948.700824158.divmod.quotient.10758@ohm>
Message-ID: <20061102194125.20948.1673187204.divmod.quotient.10786@ohm>

On Thu, 2 Nov 2006 14:15:58 -0500, Jean-Paul Calderone <exarkun at divmod.com> wrote:
>On Thu, 02 Nov 2006 19:32:54 +0100, robert <no-spam at no-spam-no-spam.com> wrote:
>>I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
>
>NumPy releases the GIL in quite a few places.

Eh, no it doesn't.  Sorry for the misinformation.  I'll double check
my memory first next time.

>Jean-Paul


From cyberco at gmail.com  Tue Nov 21 15:56:19 2006
From: cyberco at gmail.com (cyberco)
Date: 21 Nov 2006 12:56:19 -0800
Subject: Python development time is faster.
In-Reply-To: <mailman.506.1164038120.32031.python-list@python.org>
References: <mailman.506.1164038120.32031.python-list@python.org>
Message-ID: <1164142579.142264.259570@f16g2000cwb.googlegroups.com>

The wicked experience I have when writing Python code is that the
number of lines is like a YoYo. First I write my code, quick and dirty.
But then I discover a way to some things with less code while making it
even more readable, so I replace 10 lines with the new 5 lines. Then I
discover some new cool function Python offers that I can use and add it
to my application. But, of course, then again I discover that it can be
done better and simpler. Etcetera.

The cool thing about Python is a tool that perfectly fits every stage
of this writing process (from scribbling to architecting), while it
stimulates you to write "good, clean and wholesome code". And it has
this unbelievable amount of nuggets hidden under the surface!

2B



From tiedon_jano at hotmail.com  Mon Nov 27 14:14:30 2006
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Mon, 27 Nov 2006 19:14:30 GMT
Subject: python skipping lines?
In-Reply-To: <1164653920.282736.139870@j44g2000cwa.googlegroups.com>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>
	<456B338D.4050408@NOSPAMwit.edu>
	<1164653920.282736.139870@j44g2000cwa.googlegroups.com>
Message-ID: <qOGah.290$kd1.163@read3.inet.fi>

lisa.engblom at gmail.com wrote:

> RawData = open('/Python25/working/data.txt', 'r')

You open this file only once. The first time in here:

> def PullHourlyData(filename, facility, unit):
>         for line in filename:

reads all of the file - nothing left for the other function calls!

A better way would be to read the file in once to a list and give that 
lkist to the function to process.

HTH,
Jussi


From ptmcg at austin.rr._bogus_.com  Wed Nov  8 16:08:19 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 08 Nov 2006 21:08:19 GMT
Subject: decorators
References: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
Message-ID: <7Hr4h.678$mR4.557@tornado.texas.rr.com>

"John Henry" <john106henry at hotmail.com> wrote in message 
news:1163018240.383103.183930 at b28g2000cwb.googlegroups.com...
>I must be very thick.  I keep reading about what decorators are and I
> still don't have a good feel about it.  See, for example:
>
> http://alex.dojotoolkit.org/?p=564
>
> and:
>
> http://soiland.no/software/decorator
>
> What exactly do I use decorators for?
>

John -

See if any of these examples give you some ideas on how you might use a 
decorator: http://wiki.python.org/moin/PythonDecoratorLibrary

-- Paul 




From martin at v.loewis.de  Mon Nov 20 18:13:26 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 21 Nov 2006 00:13:26 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <1164046257.736569.267090@j44g2000cwa.googlegroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
	<4561515B.4060106@v.loewis.de>
	<1164046257.736569.267090@j44g2000cwa.googlegroups.com>
Message-ID: <45623696.90504@v.loewis.de>

Ross Ridge schrieb:
> Ross Ridge schrieb:
>> That would conflict with private use characters appearing in file
>> names.
> 
> Martin v. L?wis wrote:
>> Not necessarily: they could get escaped.
> 
> How?

Suppose I use U+E001..U+E0FF as the PUA characters for unencodable
bytes; U+E000 wouldn't be needed since it \0 cannot be part of
a file name in POSIX.

Then I would use U+E000 for escaping. Each PUA character in the
listed file name would get escaped with U+E000 in the Python
string; when the file name is converted back to the system, it
gets unescaped.

Notice that I think this is a really unrealistic case - I expect
that all file names containing PUA characters were deliberately
crafted to investigate using PUA characters in file names.

>> AFAICT, you can have that conflict only if the file system encoding
>> is UTF-8: otherwise, there is no way to represent them.
> 
> They can also appear UTF-16 filenames (obviously) and various Far-East
> multi-byte encodings.

No: UTF-16 file names cannot occur in POSIX, as this is not a null-byte
free encoding. What Far-East multi-byte encoding uses PUA characters,
and for what characters?

> No, I just expect that if the underlying file system API does accept a
> given byte or Unicode string that I could pass the same string to
> open() and stat(), etc.. and have it work.

On no operating system I'm aware of can you pass "Unicode strings" to
open() or stat(). You always have to find some byte encoding as
parameters for open() and stat(), because that's what POSIX specifies.

> Should I assume that since you think that having "os.listdir()" return
> Unicode strings when passed a Unicode directory name is a good idea,
> that you also think that file object methods (eg. readline) should
> return Unicode strings when opened with a Unicode filename?

No, not at all. How file names are interpreted is entirely independent
on how file content is interpreted.

Many people believe file names are character strings, and use them
as such in every day's life. OTOH, many people are aware that the
file contents of a file isn't necessarily plain text - most people
are familiar with PDF and executable files.

> On Windows you can use GetVolumeInformation(), though it may be more
> practical to assume Unicode or byte strings based on the OS.  On Unix
> you'd assume byte strings.

On Windows, the entire issue doesn't exist: We don't use open() or
stat() on Windows. If we have a Unicode file name on Windows, we
use the system's Unicode API.

>> Does OSX use Unicode (it requires path names to be UTF-8)?
> 
> HFS+ uses Unicode.  I have no idea how you'd figure out the properties
> of a filesystem under OS/X, but then the Python docs suggests this
> os.listdir() Unicode feature doesn't work on Macintosh systems anyways.

Either the docs are wrong, or you are misinterpreting them. It works
just fine in practice.

> That's the problem here, there's no
> encoding associated Unix filenames, they're just byte strings. 

Can you please quote chapter and verse of the POSIX spec that says
so? I believe POSIX specifies the entire opposite:

http://www.opengroup.org/onlinepubs/007908799/xbd/glossary.html#tag_004_000_114

says

# A name consisting of 1 to {NAME_MAX} bytes used to name a file. The
# characters composing the name may be selected from the set of all
# character values excluding the slash character and the null byte. The
# filenames dot and dot-dot have special meaning; see pathname
# resolution . A filename is sometimes referred to as a pathname
# component.
#
# Filenames should be constructed from the portable filename character
# set because the use of other characters can be confusing or ambiguous
# in certain contexts. (For instance, the use of a colon (:) in a
# pathname could cause ambiguity if that pathname were included in a
# PATH definition.)

So they are not "just byte strings"; they must come from the set of all
characters. "character" is defined as "A sequence of one or more bytes
representing a single graphic symbol or control code."

> Since
> Python byte strings also have no encoding associated with them they're
> the natural way of representing all valid file names on Unix systems.

And still, people want to render file names in a user interface to
the user.

Regards,
Martin


From roman.yakovenko at gmail.com  Mon Nov 13 01:17:17 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Mon, 13 Nov 2006 08:17:17 +0200
Subject: boost::python embedding example running error
In-Reply-To: <1163387424.605308.89030@h48g2000cwc.googlegroups.com>
References: <1163387424.605308.89030@h48g2000cwc.googlegroups.com>
Message-ID: <7465b6170611122217i5c07c356h64e3ec5b87d07c2@mail.gmail.com>

On 12 Nov 2006 19:10:24 -0800, could.net at gmail.com <could.net at gmail.com> wrote:
> I use boost 1.33_1, there's an example on boost::python named
> embedding.cpp. When I tried to build and run it in visual studio 2005,
> I got an error on this line:
>
> std::string hello() { return python::call_method<std::string>(self,
> "hello"); }
>
> It's a back ptr error.
>
> I don't know where to ask this question so I came to python group.

Boost.Python mailing list: http://mail.python.org/mailman/listinfo/c++-sig/

More resources: http://www.language-binding.net/pyplusplus/links.html


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


-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From metaperl.mogd at gmail.com  Fri Nov 10 10:58:52 2006
From: metaperl.mogd at gmail.com (metaperl.mogd at gmail.com)
Date: 10 Nov 2006 07:58:52 -0800
Subject: path.py and directory naming: trailing slash automatic?
Message-ID: <1163174332.182408.166820@f16g2000cwb.googlegroups.com>

Hi,

I'm a big fan of path.py. One thing that I think is a good idea is for
directories to automatically have a slash appended to them if it is not
automatically added. Eg:

from path import path

dir = path('/some/dir')

x = dir + "file" # should yield /some/dir/file


I emailed the author of path.py but I think he must be extremely busy.
It took him 2-3 weeks to answer my first email and it's been longer
than that for the one I sent regarding this.



From deets at nospam.web.de  Mon Nov 13 09:03:28 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Nov 2006 15:03:28 +0100
Subject: logging
References: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>
	<4rqukpFshgdkU1@mid.uni-berlin.de>
	<1163421996.988808.205220@b28g2000cwb.googlegroups.com>
Message-ID: <4rrc9gFsrvuoU1@mid.uni-berlin.de>

> 
> That's a good idea but object name change (necessity).

So what? You can log the name, but you don't need a logger with that name
for that!

Diez


From steve at holdenweb.com  Thu Nov  9 08:40:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 07:40:48 -0600
Subject: IndentationError: expected an indented block
In-Reply-To: <20061108142057.39397.qmail@web58109.mail.re3.yahoo.com>
References: <20061108142057.39397.qmail@web58109.mail.re3.yahoo.com>
Message-ID: <eivb2n$799$2@sea.gmane.org>

Antonios Katsikadamos wrote:
> hi all. I am using python 2.4. I have to run an older python code and 
> when i run it i get the following message
> 
> IndentationError: expected an indented block.
> 
> 1)what does this mean?
Just what it did the first time you asked. This is a troll to get your 
"sponsored link" published, isn't it?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From dale at riverhall.nospam.co.uk  Thu Nov 23 11:09:43 2006
From: dale at riverhall.nospam.co.uk (Dale Strickland-Clark)
Date: Thu, 23 Nov 2006 16:09:43 +0000
Subject: What's going on here?
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <hJj9h.45491$Xt5.14428@fe81.usenetserver.com>

Thanks for the answers. I am informed but I don't feel enlightened. 

It does strike me as odd that an apparently empty subclass should add extra
function to the base class. 

Not at all obvious.
-- 
Dale Strickland-Clark
We are recruiting Python programmers. Please see the web site.
Riverhall Systems www.riverhall.co.uk



From no-spam at no-spam-no-spam.invalid  Sun Nov 19 06:27:22 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 19 Nov 2006 12:27:22 +0100
Subject: Programmatically finding "significant" data points
In-Reply-To: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejpf2r$p8g$1@news.albasani.net>

erikcw wrote:
> Hi all,
> 
> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.
> 
> Here is some sample data:
> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> 0.10]
> 
> In this data, some of the significant points include:
> data[0]
> data[2]
> data[4]
> data[6]
> data[8]
> data[9]
> data[13]
> data[14]
> ....
> 
> How do I sort through this data and pull out these points of
> significance?

Its obviously a kind of time series and you are search for a "moving_max(data,t,window)>data(t)" / "moving_min(data,t,window)<data(t)": an extremum within a certain (time) window. And obviously your time window is as low as 2 or 3 or so.

Unfortunately a moving_max func is not yet in numpy and probably not achievable from other existing array functions.  You have to create slow looping code.


Robert



From fuzzyman at gmail.com  Sat Nov  4 20:46:11 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 4 Nov 2006 17:46:11 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <1162690929.501897.258360@b28g2000cwb.googlegroups.com>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1162690929.501897.258360@b28g2000cwb.googlegroups.com>
Message-ID: <1162691171.146095.67190@e3g2000cwe.googlegroups.com>


vj wrote:
> I've tried both and find WingIDE much faster than Komodo and the layout
> is very well thought out. I love the way you can collapse all the
> differnet panes with a few keystrokes. I also like their autocomplete
> functionality.
>

+1

I use Wing and enjoy its auto-completion.

Fuzzyman
http://www.voidspace.org.uk

> Wing is developed by a small company, focussed on python development,
> while komodo supports all the major scripting languages. 
> 
> VJ



From fredrik at pythonware.com  Tue Nov 14 08:52:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 14:52:33 +0100
Subject: sqlite3 views, if not exists clause
References: <4559c572$0$560$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <ejchn1$t4e$1@sea.gmane.org>

"Josh" wrote:

> THIS DOES NOT WORK, but it should!

Python 2.5 was released on September 19th, 2006, and support for CREATE
VIEW IF NOT EXISTS was added to sqlite on October 9th, 2006:

    http://www.sqlite.org/changes.html

</F> 





From enrique.palomo at xgs-spain.com  Fri Nov 10 03:56:59 2006
From: enrique.palomo at xgs-spain.com (Enrique Palomo)
Date: Fri, 10 Nov 2006 09:56:59 +0100
Subject: Create shared folder in server
Message-ID: <PITAGORASiPXkmCJiLy00000ce3@pitagoras.xgs-spain.com>


Hi all,
I'm doing some test to create and share  folders in another pc.
I'm executing an example found googling and works fine in my own pc, but
executing from another (ping is ok) raises an "access denied" error.
I've included the entry shinfo['user'], don't know if exist but is needed to
operate in different servers.
Any idea?

Thanks a lot
Enrique

import win32net
import win32netcon

shinfo={}

shinfo['netname']='prueba pitonera'
shinfo['type']=win32netcon.STYPE_DISKTREE
shinfo['remark']='bedrock_rubbel'
shinfo['permissions']=0
shinfo['max_uses']=-1
shinfo['current_uses']=0
shinfo['path']='c:\\xxxxxxxxxxxx'
shinfo['user']='xxxxxxxxxxxxxx'
shinfo['passwd']='xxxxxxxxxxxx'
server='xxxxxxxxxxxx'

try:
  win32net.NetShareAdd(server,2,shinfo)
except win32net.error:
  print
traceback.format_tb(sys.exc_info()[2]),'\n',sys.exc_type,'\n',sys.exc_value


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From __peter__ at web.de  Tue Nov 28 03:51:31 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 09:51:31 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
Message-ID: <ekgt97$31p$00$2@news.t-online.com>

HYRY wrote:

> I want to join two mono wave file to a stereo wave file by only using
> the default python module.
> Here is my program, but it is much slower than the C version, so how
> can I increase the speed?
> I think the problem is at line #1, #2, #3.

> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1

ITEMSIZE = 2
size = ITEMSIZE*(len(larray) + len(rarray))
oarray = array.array("h")
oarray.fromstring("\0" * size)

may be a bit faster.

Peter


From fredrik at pythonware.com  Fri Nov 24 09:39:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 15:39:13 +0100
Subject: Pimping the 'cgi' module
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com><mailman.670.1164364120.32031.python-list@python.org><ek6ncq$7pp$1@news.albasani.net>
	<200611241404.23599.email@christoph-haas.de>
Message-ID: <ek706h$kik$1@sea.gmane.org>

Christoph Haas wrote:

>> well, note, for that they have named it Ruby-On-Rails, so its still the
>> language - leveraged. While it is Zope/Django/Ego-on-Python ... ?
>
> If by that you mean that neither Zope nor Django are exactly pythonic I
> think I concur.

Django is highly Pythonic (it's pure Python plus templates, and has the same
"pencil-like qualities" as Python itself).  Zope 3 is highly Pythonic too, but a
rather more advanced form of Python.  but they're both application servers,
not CGI scripting environments.

>> First need of course: an update of that cgi "module".
>
> Oh, yeah. I just joined the Web SIG and found out that WSGI seems the way
> to go. At a first look it seems horrible if you just want to provide a CGI
> module.

WSGI is a CGI replacement, not a CGI implementation.  Which is a good thing,
because what really matters, if you think about what a web server is doing, is the
HTTP protocol, not an old and not always practical httpd extension standard.
WSGI simply provides plumbing for working very close to the HTTP level.

(you can of course create a WSGI-compatible adapter for CGI in no time at
all, but that's not really the point of WSGI).

> Somehow I sadly feel I would just add another incomplete  framework to that
> pile.

as they say, if you don't understand history, you're bound to repeat it ;-)

> I'm especially unsure whether it's good or bad to create another "I'm sick
> of the standard library"-style module. I've just become a bit less
> confident to actually contribute something useful there. Overwhelming.

Building a "like cgi.py, but with more support for the kind of things people actually
need" library would be an excellent idea.  It's not clear from your posts that you
"get" what things like Django and Zope do, and how that's different from "CGI
programming", but if you have a deep understanding of the latter, I'm sure you
could come up with a nice "cgi2.py" library with relatively little effort.  Get to
work!

</F> 





From paddy3118 at netscape.net  Wed Nov  8 16:44:44 2006
From: paddy3118 at netscape.net (Paddy)
Date: 8 Nov 2006 13:44:44 -0800
Subject: decorators
In-Reply-To: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
References: <1163018240.383103.183930@b28g2000cwb.googlegroups.com>
Message-ID: <1163022283.928736.14290@m7g2000cwm.googlegroups.com>


John Henry wrote:
> I must be very thick.  I keep reading about what decorators are and I
> still don't have a good feel about it.  See, for example:
>
> http://alex.dojotoolkit.org/?p=564
>
> and:
>
> http://soiland.no/software/decorator
>
> What exactly do I use decorators for?
Here's my learning experience on decorators:
http://paddy3118.blogspot.com/2006/05/python-function-attributes.html
especially:
http://paddy3118.blogspot.com/2006/05/function-attributes-assigned-by.html



From larry.bates at websafe.com  Mon Nov 20 18:35:36 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 20 Nov 2006 17:35:36 -0600
Subject: Programmatically replacing an API for another module
In-Reply-To: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
Message-ID: <39ednaWIOuxepv_YnZ2dnUVZ_omdnZ2d@comcast.com>

Tom Plunket wrote:
> I've got a bunch of code that runs under a bunch of unit tests.  It'd
> be really handy if when testing I could supply replacement
> functionality to verify that the right things get called without those
> things actually getting called, since frequently those calls take a
> long time to execute and do things that, well, I don't really want to
> do.
> 
> E.g. imagine you've got a routine which takes a filespec, generates a
> list of files, and copies those files from one location to another. (I
> realize that this example could be multiple functions that should be
> tested independently, but please bear with me.)  You don't actually
> want to do the file copy, but you want to make sure that the file copy
> API is appropriately called.
> 
> Using win32com, I might then use win32file.CopyFile, but from testing
> code I'd like to replace that with a different call, a test function
> that I supply.  Ideally I could replace the whole module, after
> importing the module under test, I could do something like 'win32com =
> __dict__', and assuming I had a CopyFile function defined in the test
> module, it'd hook right in.  However, I'm suspicious that this
> wouldn't actually override the win32com seen by the other module that
> will actually do the execution (and I don't yet understand Python's
> execution model sufficiently).
> 
> At present, ModuleTest.py does 'from Module import *' and then makes
> calls on Module without the "Module." decoration.  Since typically a
> file named SomeClass.py will only define the SomeClass class, this is
> more of a convenience than anything.  If this is a barrier to
> replacing APIs, though, well, I can change it.
> 
> Any insight is helpful, thanks.
> 
> 
> -tom!

Whatever points to something in Python is what is called.

example

def abc(a, b):
    z=a+b
    return z

def efg(a, b):
    z=a*b
    return z


f=abc
print f(1,2)
f=efg
print f(1,2)

As long as you implement the full API, you can replace functions
with others quite easily.  Note: this also works with class methods.

Observation: IMHO it is going to be really hard to keep your functional
shims up to date as you change your REAL functions/methods.  You also
are testing different code than you are executing which doesn't make
the unit tests nearly as valuable.

-Larry


From mike at hobbshouse.org  Fri Nov 10 11:37:08 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Fri, 10 Nov 2006 10:37:08 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <87ac30kwdn.fsf@benfinney.id.au>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au>
Message-ID: <4554AAB4.10002@hobbshouse.org>

Ben Finney wrote:
> Please don't hide your new thread as a reply to an existing, unrelated
> message. Start a new message if your message isn't actually a reply.
>
>   
My apologies. My email client was apparently hiding some important 
headers from me.

>> The colon that divides the statement therefore seems redundant. The
>> colon could continue to be used for single-line statements:
>>     if self.hungry: self.eat()
>>     
>
> Why have two different syntaxes for the same statement?
>
>   
Why am I allowed separate statements with semi-colons in addition to 
newlines? Why have triple-quoted long strings in addition to 
single-quoted short strings? Why do I have to type backslash to continue 
a line, except when I'm currently inside parens, brackets, or braces?

The answer is that it's a matter of convenience for the most common 
case, with some exceptions allowed for the exceptional cases.

>> I think the colon could be omitted from every type of compound
>> statement: 'if', 'for', 'def', 'class', whatever. Am I missing
>> anything?
>>     
>
> A use case. What problem is being solved by introducing this
> inconsistency?
>   
The same problem that is solved by not having to type parens around the 
'if' conditional, a la C and its derivatives. That is, it's unnecessary 
typing to no good advantage, IMHO. I was coding in Ruby for several 
months and got very comfortable with just typing the if conditional and 
hitting return, without any extra syntax. When I came back to Python, I 
found that I felt annoyed every time I typed the colon, since it 
obviously isn't required. The FAQ says that the colon increases 
readability, but I'm skeptical. The indentation seems to provide more 
than enough of a visual clue as to where the if conditional ends.

As far as using the FAQ as gospel, the FAQ also provides arguments for 
why there isn't a with statement or a switch statement. The with 
statement has already been implemented in 2.5 and there's a PEP to 
implement switch (3103).

- Mike



From could.net at gmail.com  Sun Nov 12 22:10:24 2006
From: could.net at gmail.com (could.net at gmail.com)
Date: 12 Nov 2006 19:10:24 -0800
Subject: boost::python embedding example running error
Message-ID: <1163387424.605308.89030@h48g2000cwc.googlegroups.com>

I use boost 1.33_1, there's an example on boost::python named
embedding.cpp. When I tried to build and run it in visual studio 2005,
I got an error on this line:

std::string hello() { return python::call_method<std::string>(self,
"hello"); }

It's a back ptr error.

I don't know where to ask this question so I came to python group. Has
anyone run this example successfully? Thanks in advance.



From jeffrey at fro.man  Thu Nov  2 17:33:29 2006
From: jeffrey at fro.man (Jeffrey Froman)
Date: Thu, 02 Nov 2006 14:33:29 -0800
Subject: is mod_python borked?
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
	<1162481212.495984.101510@m73g2000cwd.googlegroups.com>
	<1162501223.324957.243750@h54g2000cwb.googlegroups.com>
Message-ID: <12kksho9q9bb450@corp.supernews.com>

walterbyrd wrote:

> Researching further, it looks to me like mod_python may only work well
> on apache 2.X.

mod_python works splendidly with Apache 2.0.x as well as Apache 1.3.x. There
is a different mod_python version for each Apache branch. The version for
Apache 2.0.x has newer features, but the version for Apache 1.3.x is still
enjoyable.

Django may use features from the Apache 2.0.x mod_python version that are
not available in the Apache 1.3.x version, thus making Django incompatible
with Apache 1.3.x.


Jeffrey 


From fredrik at pythonware.com  Thu Nov  2 16:33:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 22:33:43 +0100
Subject: what's the difference between these two methods? (aka,   why
	doesn't one of them work?)
In-Reply-To: <1162502862.141973.324040@h48g2000cwc.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>	<eidlah$v0m$01$1@news.t-online.com>	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>	<mailman.1692.1162502583.11739.python-list@python.org>
	<1162502862.141973.324040@h48g2000cwc.googlegroups.com>
Message-ID: <eido7n$4j0$1@sea.gmane.org>

JohnJSal wrote:

> That's a perfectly valid comment, but in this case just not applicable.
> I spent a lot of time working through my original question before
> posting, but I just couldn't get it.

how do you fit "a lot of time" into 18 minutes?

</F>



From dakman at gmail.com  Tue Nov 14 13:56:24 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 14 Nov 2006 10:56:24 -0800
Subject: Is python for me?
In-Reply-To: <1163448523.712403.232970@i42g2000cwa.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
Message-ID: <1163530584.269684.214520@h48g2000cwc.googlegroups.com>

By large I mean an application with intensive operations, such as a
fancy GUI maybe a couple of threads, accessing a database, etc.

lennart wrote:
> dakman at gmail.com schreef:
>
> > As stated above python is capable of all those things, however on
> > larger applications like that it can tend to slow down a bit. And the
> > executables do need a little bit of work, because it's bassicly a dll
> > and a library of all your .pyc files. However python is still a great
> > language and I would recomend it. And most of these things will
> > probably be fixed in Python 3000!
> >>
> >> <<snip>>
> > > Python very quickly.
>
> Can you define 'large'? Is that large in code, or large in database? I
> don't know which database is supported. If its a external db, like
> MySql, the query is performed through the software of MySql, am I
> right? If I'm correct, the 'slowness' comes from the amount of code in
> python itself, not from the database.



From iladijas at gmail.com  Mon Nov 13 10:13:54 2006
From: iladijas at gmail.com (fynali)
Date: 13 Nov 2006 07:13:54 -0800
Subject: Fredrik Lundh [was "Re: explicit self revisited"]
In-Reply-To: <1163315672.921664.306460@e3g2000cwe.googlegroups.com>
References: <ej5fuv$a4a$1@online.de>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2119.1163289905.11739.python-list@python.org>
	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>
Message-ID: <1163430834.390202.266710@h48g2000cwc.googlegroups.com>

> You idiot.  Putting the word "official" in front of something doesn't
> mean it can't be FUD.  Especially when it is written by people such as
> yourself.  Have you not paid attention to anything happening in
> politics around the world during your lifetime?

Ridiculous boo-llshit!



From fredrik at pythonware.com  Fri Nov  3 14:13:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 20:13:57 +0100
Subject: ANN: SE 2.3. Available now
In-Reply-To: <454B8B8D.8010406@vtxmail.ch>
References: <454B3B49.6070702@vtxmail.ch>
	<454B6FEC.20709@islandtraining.com>	<eifrs9$gb0$1@sea.gmane.org>
	<454B8B8D.8010406@vtxmail.ch>
Message-ID: <eig4dk$g9l$1@sea.gmane.org>

Frederic Rentsch wrote:

> And here's the proof I am being perceived as a nuisance. I apologize, 
> keeping to myself that I don't care.

since you're constantly targeting newbies, and are hawking your stuff 
also for things for which there are simple and efficient solutions 
available in Python's standard library, your behavior could be seen
as more than just a nuisance.

</F>



From ladasky at my-deja.com  Fri Nov  3 11:51:41 2006
From: ladasky at my-deja.com (John Ladasky)
Date: 3 Nov 2006 08:51:41 -0800
Subject: Keyboard interrupts, Idle vs. SciTE
In-Reply-To: <DFu2h.57701$rP1.32384@news-server.bigpond.net.au>
References: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
	<DFu2h.57701$rP1.32384@news-server.bigpond.net.au>
Message-ID: <1162572701.034538.156260@m7g2000cwm.googlegroups.com>

Thanks for the SciTE info, Neil.

Yes, it was silly of me to forget to state that I'm using Win32.
Normally, when I post to comp.lang.python, I remember to include that
fact... :^P

+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Ladasky Home Solar, Inc.:  blowing sunshine up your   |
|       power grid since March 24, 2005.  Fiat lux!       |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Uptime    Downtime    kWh generated     kWh consumed  |
|   584 days  6.5 hours       10953            10982      |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+



From mail at microcorp.co.za  Wed Nov 15 01:23:00 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 15 Nov 2006 08:23:00 +0200
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com><n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
	<d5f60f0c0611141504h7f0ccdc9h388ca13528b8858d@mail.gmail.com>
Message-ID: <011401c7087f$c71a3200$03000080@hendrik>

Olexandr Melnyk  wrote:


> PHP has a lower barrier to entry

I don't think so. Python has more intuitive syntax for beginners and is one of
the best choices for the first programming language to pick up.

I second this - before discovering Python (in a GSM module's guts) - I was being
steered in the direction of PHP by a friend - and I resisted, kicking and
screaming, as I found the syntax weird -  I believe its not called Personal Home
Page for nothing...

- Hendrik



From bytter at gmail.com  Thu Nov 23 06:57:04 2006
From: bytter at gmail.com (Bytter)
Date: 23 Nov 2006 03:57:04 -0800
Subject: PyParsing and Headaches
In-Reply-To: <mailman.608.1164225033.32031.python-list@python.org>
References: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
	<mailman.608.1164225033.32031.python-list@python.org>
Message-ID: <1164283023.996975.292750@f16g2000cwb.googlegroups.com>

(This message has already been sent to the mailing-list, but I don't
have sure this is arriving well since it doesn't come up in the usenet,
so I'm posting it through here now.)

Chris,

Thanks for your quick answer. That changes a lot of stuff, and now I'm
able to do my parsing as I intended to.

Still, there's a remaining problem. By using Combine(), everything is
interpreted as a single token. Though what I need is that
'include_bool' and 'literal' be parsed as separated tokens, though
without a space in the middle...

Paul,

Thanks for your detailed explanation. One of the things I think is
missing from the documentation (or that I couldn't find easy) is the
kind of explanation you give about 'The Way of PyParsing'. For example,
It took me a while to understand that I could easily implement simple
recursions using OneOrMany(Group()). Or maybe things were out there and
I didn't searched enough...

Still, fwiw, congratulations for the library. PyParsing allowed me to
do in just a couple of hours, including learning about it's API (minus
this little inconvenient) what would have taken me a couple of days
with, for example,  ANTLR (in fact, I've already put aside ANTLR more
than once in the past for a built-from-scratch parser).

Cheers,

Hugo Ferreira

On Nov 22, 7:50 pm, Chris Lambacher <c... at kateandchris.net> wrote:
> On Wed, Nov 22, 2006 at 11:17:52AM -0800, Bytter wrote:
> > Hi,
>
> > I'm trying to construct a parser, but I'm stuck with some basic
> > stuff... For example, I want to match the following:
>
> > letter = "A"..."Z" | "a"..."z"
> > literal = letter+
> > include_bool := "+" | "-"
> > term = [include_bool] literal
>
> > So I defined this as:
>
> > literal = Word(alphas)
> > include_bool = Optional(oneOf("+ -"))
> > term = include_bool + literal+ here means that you allow a space.  You need to explicitly override this.
> Try:
>
> term = Combine(include_bool + literal)
>
>
>
> > The problem is that:
>
> > term.parseString("+a") -> (['+', 'a'], {}) # OK
> > term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
> > recognize any token since I didn't said the SPACE was allowed between
> > include_bool and literal.
>
> > Can anyone give me an hand here?
>
> > Cheers!
>
> > Hugo Ferreira
>
> > BTW, the following is the complete grammar I'm trying to implement with
> > pyparsing:
>
> > ## L ::= expr | expr L
> > ## expr ::= term | binary_expr
> > ## binary_expr ::= term " " binary_op " " term
> > ## binary_op ::= "*" | "OR" | "AND"
> > ## include_bool ::= "+" | "-"
> > ## term ::= ([include_bool] [modifier ":"] (literal | range)) | ("~"
> > literal)
> > ## modifier ::= (letter | "_")+
> > ## literal ::= word | quoted_words
> > ## quoted_words ::= '"' word (" " word)* '"'
> > ## word ::= (letter | digit | "_")+
> > ## number ::= digit+
> > ## range ::= number (".." | "...") number
> > ## letter ::= "A"..."Z" | "a"..."z"
> > ## digit ::= "0"..."9"
>
> > And this is where I got so far:
>
> > word = Word(nums + alphas + "_")
> > binary_op = oneOf("* and or", caseless=True).setResultsName("operator")
> > include_bool = oneOf("+ -")
> > literal = (word | quotedString).setResultsName("literal")
> > modifier = Word(alphas + "_")
> > rng = Word(nums) + (Literal("..") | Literal("...")) + Word(nums)
> > term = ((Optional(include_bool) + Optional(modifier + ":") + (literal |
> > rng)) | ("~" + literal)).setResultsName("Term")
> > binary_expr = (term + binary_op + term).setResultsName("binary")
> > expr = (binary_expr | term).setResultsName("Expr")
> > L = OneOrMore(expr)
>
> > --
> > GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85
> 
> > --
> >http://mail.python.org/mailman/listinfo/python-list



From mike at hobbshouse.org  Mon Nov 13 13:50:40 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 12:50:40 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163353941.3497.45.camel@localhost.localdomain>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
	<1163353941.3497.45.camel@localhost.localdomain>
Message-ID: <4558BE80.9010909@hobbshouse.org>

Carsten Haese wrote:
> On Sat, 2006-11-11 at 23:18 -0800, Doug wrote:
>   
>> Michael Hobbs wrote:
>>     
>>> I think the colon could be omitted from every type of compound
>>> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
>>>
>>> Thanks,
>>> - Mike
>>>       
>> It is a very good idea as the colon is technically redundant (not
>> necessary for parsing, aside from one liners) and actually hurts
>> readability (and writeability).  The "evidence" people cite for the
>> advantage of using a colon is research done by users of the ABC
>> language, python's predecessor.  They forget that A) that was like 20
>> years ago,
>>     
>
> Research being old does not automatically invalidate it. Old research is
> invalidated by newer research that invalidates it.
>
>   
No, old research does is not automatically invalidated, but 
out-of-context research is. I'm sure there's research somewhere proving 
that code written in ALL UPPERCASE is preferable, since it makes 
punched-cards easier to read by humans. Python 1.0 may have been a nice 
language for "newbies", with a lot of similarities to ABC, but there has 
been a lot of evolution since then. Sure, it's still very easy to teach 
basic Python, but if you're concerned about readability, take a look at 
any real-world Python app or library. You'll find it's filled with 
things such as "__getattr__", "__repr__", "__nonzero__", and 
"super(MyClass, self).__init__()". Hardly newbie stuff.

I think waving the banner of ABC simplicity in the context of Py3K is 
about as applicable as complaining that an RSS aggregator isn't written 
in assembly. (An RSS aggregator is so far beyond being CPU-bound that 
it's pointless to argue which language it should be written in.)

- Mike



From Anders+news at Arnholm.nu  Thu Nov  9 11:00:33 2006
From: Anders+news at Arnholm.nu (Anders Arnholm)
Date: Thu, 9 Nov 2006 17:00:33 +0100
Subject: Can not download plugins for jEdit (help!!)
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
Message-ID: <slrnel6k51.d1q.Anders+news@tika.arnholm.se>

Ant <antroy at gmail.com> skriver:
>> Vim, it can handle all the things.http://www.vim.org/
>
> I'm not convinced of that quite yet. jEdit's syntax highlighting seems
> more robust (see SocketServer.py in the standard library for an example
> - vim gets the highlighting of the first doc-comment wrong). I've also

I can't see that problem at all. Vim 7.0 standard win32 build and
6.4 on OpenBSD.

My vimrc hold and old rule that I'm not sure is needed or how it works
against the new standard python module:

:au BufEnter *.py :set smarttab smartindent \
    cinwords="if,elif,else,for,while,def,try,rxcept,finally,class"

I have not yet seen any problenm from it but maybe it's time to remote
it soon.


/ Balp
-- 
http://anders.arnholm.nu/			     Keep on Balping


From gagsl-py at yahoo.com.ar  Fri Nov 10 20:40:44 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 10 Nov 2006 22:40:44 -0300
Subject: Inheritance Question
In-Reply-To: <ej34k1$6oh$1@skeeter.ucdavis.edu>
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
Message-ID: <7.0.1.0.0.20061110214035.0497fb00@yahoo.com.ar>

At Friday 10/11/2006 21:13, Jackson wrote:

>I've got an inheritance question and was hoping brighter minds could
>guide me.  I am in the strange situation where some of the methods in a
>subclass are actually more general than methods in a superclass.  What
>is the preferred way to handle such situations.  My original thought was
>to do something like this:
>
>class AA(object):
>         def general_method(): pass
>
>class A(AA):
>    # redefine general_method() to call a
>    # restricted version of AA.general_method()
>
>class B(A,AA):
>    # redefine general_method() to call AA.general_method()
>
>This seems ugly to me, and I am wondering if there is a better method.
>So any suggestions would be appreciated.

(Note that even using your design, B doesn't have to inherit from 
both A and AA, just inheriting from A is enough to be able to  call 
AA.general_method)

It's hard to tell in this abstract terms, but maybe you should 
consider whether really B "is an" A, and A "is an" AA.
Other kind of relationships are possible, like delegation ("behaves 
like") or the strategy pattern ("now behaves like...", at runtime).

>For a more "concrete" example:

Ahhhh! I didn't notice this when I read your post.

>Suppose all the animals in the world have only 1 or 2 legs.

I would not consider walk a method of Legs, but of Animal. An Animal 
"has" Legs; it may have OneLeg or TwoLegs. An Animal walks "using" its legs.

class Animal:
     def __init__(self, number_of_legs):
         # an animal has legs
         self.legs = CreateLegs(self, number_of_legs)

     def walk(self):
         # an animal uses its legs to walk
         self.legs.walk()

class Legs:
     def walk():
         raise NotImplementedError # an abstract Legs doesn't have how to walk

class OneLeg(Legs): # a monopod? like in Plinius? 
"http://en.wikipedia.org/wiki/Monopod_(creature)"
     def walk():
          # implement walking with one leg
          print "Look ma, just one leg!"

class TwoLegs(Legs):
     def walk():
          # implement walking with two legs
          print "Left, rigth, left, right..."

def CreateLegs(animal, number_of_legs):
     # legs might depend on animal too
     if number_of_legs==1: return OneLeg()
     elif number_of_legs==2: return TwoLegs()
     raise ValueError, "Invalid number of legs: %d" % number_of_legs

If walking in general, have some common structure, you can put the 
"sketch" on Legs and let the derived classes "fill the gaps". This is 
known as "Template Method Pattern" - look for it.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From bj_666 at gmx.net  Tue Nov 28 04:12:23 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 28 Nov 2006 10:12:23 +0100
Subject: Python script and C++
References: <456b83c7$1@clarion.carno.net.au>
	<1164691472.172783.151290@n67g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.28.09.12.21.978965@gmx.net>

In <1164691472.172783.151290 at n67g2000cwd.googlegroups.com>, Ravi Teja
wrote:

>>     I am new to python  and currently I am working on a traffic simulation
>> which I plan to define the various agents using scripting. It's kind of like
>> scripting for non-playable character in games. I am thinking of using python
>> for this but I am concerned with running time. Is scripting a lot slower
>> compared to direct implementation in C++? Does compiling the script help in
>> any way?
> 
> Python is perfectly suitable for this use. Python was in use in video
> games in this way when computers were a lot slower.

There's a difference between simulations and games.  The simulation will
not always be observed by a human being so it runs as fast as possible.
In games the speed of NPCs is usually limited to a level the player can
deal with.

But I think Python is fine for such a task.  The only way to find out if
it may be to slow is writing a prototype and measure.  Maybe it's a good
idea to design the API for the "NPCs" independent from the language so you
can also write them in C++ or another scripting language.

Ciao,
	Marc 'BlackJack' Rintsch


From mensanator at aol.com  Wed Nov 22 19:35:38 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 22 Nov 2006 16:35:38 -0800
Subject: Abelson and Python
In-Reply-To: <1164241247.453138.296580@m73g2000cwd.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164240649.628193.65300@f16g2000cwb.googlegroups.com>
	<1164241247.453138.296580@m73g2000cwd.googlegroups.com>
Message-ID: <1164242138.749183.144160@k70g2000cwa.googlegroups.com>


bearophileH... at lycos.com wrote:
> mensanator at aol.com:
> > No surprise to anyone who's ever tried to use MIT Scheme.
>
> Be careful, such assertions are often flamebait.

Well, yeah, it's a warning to everyone to not
bother with the MIT implementation of Scheme which
is completely worthless.

>
> I am using DrPython

Haven't heard of that one, although I've got DrScheme.

> (I think they were using it at MIT too lately),

That's no surprise since the MIT implementation
of Scheme is worthless.

> and
> it is very very good IDE, it produces executables on the fly, it has a
> visual debugger with some nice graphical things, it manages graphics,
> and it has something that I have never seen in Python: it manages a
> hierarchy of simpler Scheme languages, useful to learn for students.
> Probably something similar may be useful to learn Python too (such
> stripped down Python versions can forbid things like  def foo(x=[]):
> ...).

I find that hierarchy extremely annoying. I don't see the need for it.
I never use OOP in Python yet there's no need for me to have a
stripped down version, I just don't use it.

> I am appreciating Scheme a bit because of such very good editor
> that makes things possible for newbies of the language too.

But those are implementation details, which you can't avoid.
A bad implementation spoils a language even if the language itself
is fabulous.

> 
> Bye,
> bearophile



From michele.simionato at gmail.com  Mon Nov 13 03:51:10 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 13 Nov 2006 00:51:10 -0800
Subject: explicit self revisited
In-Reply-To: <ej5fuv$a4a$1@online.de>
References: <ej5fuv$a4a$1@online.de>
Message-ID: <1163407870.637052.32760@m73g2000cwd.googlegroups.com>

Peter Maas wrote:
> The Python FAQ 1.4.5 gives 3 reasons for explicit self (condensed version):
>
> 1. Instance variables can be easily distinguished from local variables.
>
> 2. A method from a particular class can be called as
>    baseclass.methodname(self, <argument list>).
>
> 3. No need for declarations to disambiguate assignments to local/instance
>    variables.
>
> All these reasons are valid and retained by the following suggestion: let
> self be represented by the dot <snip>

This suggestion has been discussed in the past (I remember having the
same idea
myself when I first learned Python). But at the end I believe the
explicit 'self' is
a better solution, because there are cases where it is useful to have
it (see Steven
d'Aprano's post) and also I like the fact that  I can spell it 'cls' in
classmethods and in
metaclasses. After a while one gets used to it and if you think a bit
it makes quite a
lot sense. Also, having the self explicit, makes Python object system
better (i.e.
it goes more in the direction of CLOS and less in the direction of
Java).

          Michele Simionato



From pgarrone at acay.com.au  Sat Nov 11 09:07:13 2006
From: pgarrone at acay.com.au (pgarrone at acay.com.au)
Date: 11 Nov 2006 06:07:13 -0800
Subject: handling many default values
In-Reply-To: <yZj5h.119$tb2.36@trnddc08>
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<mailman.2074.1163201795.11739.python-list@python.org>
	<yZj5h.119$tb2.36@trnddc08>
Message-ID: <1163254033.689265.190240@h54g2000cwb.googlegroups.com>


Alan Isaac wrote:
> > At Friday 10/11/2006 14:11, Alan G Isaac wrote:
> > >class Params:
> > >      def __init__(self,**kwargs):
> > >          #set lots of default values
> > >          ...
> > >          #set the deviations from defaults
> > >          self.__dict__.update(kwargs)
> > >
> > >Is this a reasonable approach overall?
> > >(Including the last line.)
>
>
> "Gabriel Genellina" wrote in message
> news:mailman.2074.1163201795.11739.python-list at python.org...
> > I'm not sure what you want to do exactly, but a class attribute acts
> > as a default instance attribute.
>
> Yes.  I am sorry my question was not clearer.
> There are *many* parameters,
> and the list can change,
> so I want to avoid listing them all in the Param class's __init__ function,
> using the strategy above.
>
> Q1: Is this approach reasonable?
>     (This is a newbie question about unforseen hazards.)
> Q2: Is it horrible design to isolate the parameters in a separate class?
>     (Comment: currently several classes may rely on (parts of) the same
> parameter set.)
>
> Thanks,
> Alan Isaac
Hi,
 I kind of had a similar problem when I was developing a 3d OO engine.
I had many
bigger things composed of lots of little things, and a lot of code was
spent
initializing the little things in constructors.

So I just passed a reference of the bigger thing to the little thing in
its constructor, thus saving a lot
of parameter passing and variable setup and copying. In the following
example, big is passed to
little's constructor, instead of all of big's variables.

ie.
class big:
   def __init__(self):
      self.v1 = ...
      self.v2 = ...
      self.objects = []
  def assemble(self):
      self.objects.append(little(self, 1))
      self.objects.append(little(self,2))

class little:
   def __init__(self, big, n):
     self.big = big # Now little has access to v1, v2 by self.big.v1
etc
     self.n = n  # This makes it different
  def a_function(self):
     do_something(self.big.v1, self.big.v2)



From tomas at fancy.org  Thu Nov  2 18:23:59 2006
From: tomas at fancy.org (Tom Plunket)
Date: Thu, 02 Nov 2006 15:23:59 -0800
Subject: Win32 COM
References: <t3eik2d1uctiiniuc7ijopbladmo0epf3n@4ax.com>
Message-ID: <aqtkk2t596gcnb57i4p4vq5o4ohatbldgf@4ax.com>

Tom Plunket wrote:

> I don't know anything about COM beyond the fact that I can look in the
> OLE/COM browser to maybe figure out the API that an object has that I
> need to operate on.

I'm still not entirely sure what's going on, because there are some
methods and properties that are available before doing this, but
makepy was part of my solution.

What I wanted to avoid was explicitly going around and running makepy
N times on everyone's machine that might need to run this toolset.
What I discovered I could do was run makepy with a -i command-line
parameter, which would emit code that would kick the gencache to
implicitly run makepy if necessary.  So, problem solved!

in my case:

: C:\Python24\Lib\site-packages\win32com\client>makepy -i
: NxNXMLHelper 1.0 Type Library
:  {5E7B0F01-92C1-11D3-A5FB-00104B45886F}, lcid=0, major=1, minor=0
:  >>> # Use these commands in Python code to auto generate .py support
:  >>> from win32com.client import gencache
:  >>> gencache.EnsureModule('{5E7B0F01-92C1-11D3-A5FB-00104B45886F}', 0, 1, 0)

Very handy!


-tom!


From sjmachin at lexicon.net  Tue Nov 14 12:54:28 2006
From: sjmachin at lexicon.net (John Machin)
Date: 14 Nov 2006 09:54:28 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <1163506226.041478.178830@m7g2000cwm.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<1163504683.480050.242050@h54g2000cwb.googlegroups.com>
	<1163505308.880218.310810@b28g2000cwb.googlegroups.com>
	<1163506226.041478.178830@m7g2000cwm.googlegroups.com>
Message-ID: <1163526867.838600.176320@e3g2000cwe.googlegroups.com>


billpaterson2006 at googlemail.com wrote:
> Thanks Fredrik, Peter and John for your help.
>
> John, I especially enjoyed your line by line assasination of my code,
> keep it up.
>
> I'm not a programmer, I dislike programming, I'm bad at it. I just
> agreed to do this to help someone out, I didn't even know what python
> was 3 days ago.
>

I would have to disagree strongly with the "I'm bad at it". Everything
is relative. I've seen mind-bogglingly fugly incoherent messes produced
by people who claim to be professional programmers with 3 *years*
experience in a language (only rarely in Python). To have produced what
you did -- it was clear enough what you were trying to do, and it
"worked" well enough for a one-off job -- with 3 *days* experience with
Python was a remarkable achievement IMHO.

What's this "dislike programming" business? No such concept :-)

Cheers,
John



From srinivasaraju.datla at gmail.com  Wed Nov  8 06:53:22 2006
From: srinivasaraju.datla at gmail.com (Srinivasa)
Date: 8 Nov 2006 03:53:22 -0800
Subject: Need help
Message-ID: <1162986802.818675.5510@h48g2000cwc.googlegroups.com>

Hai friends,
I wrote a programme to display a window (ui) using Python. I renamed it
as .pyw to avoid popping-up the dos window while running it. It worked
fine. But when i converted  it to executable file using py2exe; the dos
window appears. Can anybody tell me what the solution is.

Thanks and Regards
- Srinivasa Raju Datla



From paul.keating at nibc.com  Mon Nov 20 10:47:56 2006
From: paul.keating at nibc.com (paul.keating at nibc.com)
Date: 20 Nov 2006 07:47:56 -0800
Subject: Misleading IOerror when opening a non-existent file for append?
In-Reply-To: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
References: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
Message-ID: <1164037676.537263.53480@f16g2000cwb.googlegroups.com>

It probably is misleading. But I'd say it's a misleading Linux message
not a misleading Python message.
f = file(r'c:\temp\DoesNotExist.txt','a')
not only does not give a misleading error under Windows, it works.

It appears that under Linux if you open a file for writing, but specify
append, it complains about the append if there isn't a file to append
to (a reasonable complaint, IMO).

> >>> ifile=open("\\no_such_dir\\no_such_file" ,'a')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> IOError: invalid mode: a

> >>> ifile=open("\\no_such_dir\\no_such_file" ,'r')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> IOError: [Errno 2] No such file or directory:



From fredrik at pythonware.com  Wed Nov 22 09:57:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 15:57:34 +0100
Subject: What's going on here?
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <ek1ogu$gm6$1@sea.gmane.org>

Dale Strickland-Clark wrote:

> Why can't I assign to attributes of an instance of object?

it doesn't have any attribute storage.

</F> 





From jjl at pobox.com  Mon Nov 27 20:19:11 2006
From: jjl at pobox.com (John J. Lee)
Date: Tue, 28 Nov 2006 01:19:11 GMT
Subject: urllib2 spinning CPU on read
References: <1164531283.213844.243990@l39g2000cwd.googlegroups.com>
Message-ID: <87odqse5bk.fsf@pobox.com>

"kdotsky" <kdotsky at gmail.com> writes:

> Hello All,
> I've ran into this problem on several sites where urllib2 will hang
> (using all the CPU) trying to read a page.  I was able to reproduce it
> for one particular site.  I'm using python 2.4
> 
> import urllib2
> url = 'http://www.wautomas.info'
[...]
> Also, where should I go to see if something like this has already been
> reported as a bug?

I didn't try looking at your example, but I think it's likely a bug
both in that site's HTTP server and in httplib.  If it's the same one
I saw, it's already reported, but nobody fixed it yet.

http://python.org/sf/1411097


John


From fredrik at pythonware.com  Wed Nov 22 04:49:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 10:49:19 +0100
Subject: file backup in windows
In-Reply-To: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
Message-ID: <ek16ev$g3j$1@sea.gmane.org>

k.i.n.g. wrote:

> how can i make the following code work, I have probelm with filepath
> declaration.

http://effbot.org/pyfaq/tutor-i-need-help-im-getting-an-error-in-my-program-what-should-i-do

</F>



From bnblazer at gmail.com  Wed Nov  8 23:06:59 2006
From: bnblazer at gmail.com (Brian)
Date: 8 Nov 2006 20:06:59 -0800
Subject: Strange re problem on OSX but Not Linux
In-Reply-To: <cKr4h.679$mR4.350@tornado.texas.rr.com>
References: <1163008904.817018.186000@h54g2000cwb.googlegroups.com>
	<mailman.1932.1163019917.11739.python-list@python.org>
	<cKr4h.679$mR4.350@tornado.texas.rr.com>
Message-ID: <1163045219.373704.163850@i42g2000cwa.googlegroups.com>


Paul McGuire wrote:
> "Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote in message
> news:mailman.1932.1163019917.11739.python-list at python.org...
> > Dont use regex as a name. Also, do you have any script called "re.py"
> > hidding that library module? or regex.py?
>
> My bet is that a local re.py is masking the lib module.  (It's a shame this
> error is so easy to trip over.)
>
> -- Paul

I figured that one out so I renamed the file.  Unfortunately it took me
a while to realize that I needed to delete re.pyc as well.

Brian



From fredrik at pythonware.com  Wed Nov  1 15:06:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 21:06:00 +0100
Subject: best way to check if a file exists?
In-Reply-To: <1162411010.495259.311680@i42g2000cwa.googlegroups.com>
References: <EQO1h.213$1n3.4609@news.tufts.edu>	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>	<mailman.1597.1162389697.11739.python-list@python.org>	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>	<mailman.1606.1162392331.11739.python-list@python.org>
	<1162411010.495259.311680@i42g2000cwa.googlegroups.com>
Message-ID: <eiaun8$252$1@sea.gmane.org>

wittempj at hotmail.com wrote:

> os.path.exists() checks if a path exists, so a directory as argument
> also returns True

the original requirement was "to check if a file of a certain name 
exists before the user creates a new file of that name".

if you want to check for files only, use the os.path.isfile predicate.

</F>



From researchbase at gmail.com  Sat Nov 18 23:28:19 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Sun, 19 Nov 2006 09:58:19 +0530
Subject: please help me choose a proper gui library.
In-Reply-To: <1163882457.430161.140570@h54g2000cwb.googlegroups.com>
References: <mailman.425.1163871854.32031.python-list@python.org>
	<1163882457.430161.140570@h54g2000cwb.googlegroups.com>
Message-ID: <f81479dd0611182028v61c7635ep1460708051d02b02@mail.gmail.com>

On 18 Nov 2006 12:40:57 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
> It's a matter of taste. I would recommend PyGTK (yes it runs on
> Windows). You can design the GUI in a fly with GLADE, and import it as
> an XML resource in Python with one single line of code.
I also have to consider the issue of accessibility.
I am blind myself and need to know what I am coding.  and as a policy
matter our company always makes use of accessible libraries just in
case any client is also handicap.  some laws have also made it
mandatory.


>It will save
> you an awful lot of work; all you have to code is the event handlers.
that will be great provided it is accessible on windows.
> Additionally you get the GUI design out of you code, which makes
> maintenance a lot easier. You can redesign the GUI without changing or
> breaking your existing Python code.
that is great but I don't want to use glade.
I will like a simple ide where I can do hand coding.
I am going to try python with eclipse.


thanks,
Krishnakant.


From http  Sun Nov  5 03:30:18 2006
From: http (Paul Rubin)
Date: 05 Nov 2006 00:30:18 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
Message-ID: <7x7iyafg85.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> > I think that has to be on a single processor, or at most a dual core
> > processor with shared cache on die.  With multiple cpu chips I don't
> > think can get the signals around that fast.
> 
> Can you explain what you mean? The lock# signal takes *immediate*
> effect, within the CPU cycle in which it is asserted. There is no
> delay whatsoever (except for speed-of-light issues, of course).

I dunno about x86 hardware signals but these instructions do
read-modify-write operaitons.  That means there has to be enough
interlocking to prevent two cpu's from updating the same memory
location simultaneously, which means the CPU's have to communicate.
See <http://en.wikipedia.org/wiki/MESI_protocol> (I think this is
how the current x86's do it):

    A cache that holds a line in the Modified state must snoop
    (intercept) all attempted reads (from all of the other CPUs in the
    system) of the corresponding main memory location and insert the
    data that it holds. This is typically done by forcing the read to
    back off (i.e. to abort the memory bus transaction), then writing
    the data to main memory and changing the cache line to the Shared
    state.
    
    A cache that holds a line in the Shared state must also snoop all
    invalidate broadcasts from other CPUs, and discard the line (by
    moving it into Invalid state) on a match.

It is quite difficult to get signals off of a chip at GHz speeds, and
so this signalling is much slower than the CPU cycle.


From rpurser at mathworks.com  Mon Nov 27 10:16:54 2006
From: rpurser at mathworks.com (Rob Purser)
Date: Mon, 27 Nov 2006 10:16:54 -0500
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
	<1164504562.834005.197830@l39g2000cwd.googlegroups.com>
Message-ID: <ekevh6$2d5$1@fred.mathworks.com>

Hi all,

I'm not going to touch the big picture issues here -- you need to pick the 
right tool for the job you're doing, and only you know what works best for 
your task.  However, since it didn't come up, I feel I need to add a piece 
of info to the mix, since I spend my days getting MATLAB working with data 
acquisition hardware.  To be clear, I'm the development lead for Data 
Acquisition Toolbox, which is MathWorks' add on product to MATLAB and 
Simulink to handle all the issues associated with interfacing data 
acquisition hardware without all the CMEX work, threading, DLLs, etc.  As 
Sturla points out, that's not trivial work in any language.

Anyway, I just wanted to call your attention to Data Acquisition Toolbox:
http://www.mathworks.com/products/daq/

I'm not sure what hardware you're using, Phil, so I can't say whether we 
support it.  We do add support for new hardware all the time, so I'd be 
interested in hearing about your application.

All the best,
-Rob

-- 
Rob Purser
Senior Team Lead, Connectivity Products
The MathWorks
rob.purser at mathworks.com

"sturlamolden" <sturlamolden at yahoo.no> wrote in message 
news:1164504562.834005.197830 at l39g2000cwd.googlegroups.com...
>
> Phil Schmidt wrote:
>
>> Thanks for that list. I'm currently in the process of getting quotes
>> for a bunch of Matlab tools for hardware-in-the-loop simulation. Big
>> bucks.
>
> Yup, and better spent elsewhere...
>
>
>> I'd love to use Python, but I'm not comfortable with the hardware side
>> of that. I'm certain that most, if not all data acquisition hardware
>> comes with DLL drivers, which I could interface with using ctypes. I'm
>> concerned though about spending more time messing around with the
>> hardware interface than it's worth.
>
> Usually you have to mess equally much with Matlab, writing CMEX
> interfaces between the DLLs and Matlab. And afterwards you get the
> headache of Matlab's single-threaded environment and horrible
> pass-by-value sematics.
>
>
>> Do you have any experience with this side of the Matlab replacement
>> question? How about anyone else? Any recommendations?
>
> If you are afraid of doing some C coding or using ctypes, I'd say go
> for LabView. When it comes to data acquisition, LabView is far superior
> to Matlab. And data acquisition hardware usually comes with LabView
> drivers ready to run. LabView can also compile programs that you can
> run on real-time OS'es and common DSP chips, so you will not need to
> port your code to these targets if you need hard real-time constraints
> in your system.
>
> First find out what drivers or APIs are supplied with the hardware.
> Then do the decision of which language to use - including Python,
> Matlab, LabView, Java, C# .NET, C or C++. I would in any case get a
> quote for LabView as well, i does not cost you anything just to obtain
> the quote. Generally, development time is far more expensive than
> licenses, even with the ultra-expensive Matlab and LabView software.
> Using Python just for the sake of using Python is silly.
> 




From webmaster at cacradicalgrace.org  Wed Nov 15 12:08:30 2006
From: webmaster at cacradicalgrace.org (J. Clifford Dyer)
Date: Wed, 15 Nov 2006 10:08:30 -0700
Subject: modules and generated code
References: <mailman.146.1163514956.32031.python-list@python.org>	<ejckue$ns2$01$1@news.t-online.com>	<mailman.150.1163517249.32031.python-list@python.org>	<ejcq59$920$00$1@news.t-online.com>
	<mailman.163.1163526017.32031.python-list@python.org>
Message-ID: <ejfhqf$189$1@aioe.server.aioe.org>

Nigel Rantor wrote:
> Peter Otten wrote:
>> Nigel Rantor wrote:
>>
>>> Peter Otten wrote:
>>>> Nigel Rantor wrote:
>>
>>>>> So, if I have a tool that generates python code for me (in my case,
>>>>> CORBA stubs/skels) in a particular package is there a way of 
>>>>> placing my
>>>>> own code under the same package hierarchy without all the code 
>>>>> living in
>>>>> the same directory structure.
>>
>>>> http://docs.python.org/lib/module-pkgutil.html
>>
>>> Yep, looks like that should work, but it doesn't. :-/
>>>
>>> Do you have any idea whether other __init__.py scripts from the same
>>> logical module will still be run in this case?
>>
>> I don't think it will.
> 
> Yeah, I am getting that impression. Gah!
> 
>>> The generated code uses its init script to pull in other code.
>>
>> You could invoke it explicitly via
>> execfile("/path/to/generated/package/__init__.py")
>> in the static package/__init__.py.
> 
> Hmm, yes, that works. It's not pretty though, it seems to be finding the 
> file relative to the current directory, I suppose writing a bit of code 
> that figures out where this package is located and modifying it won't be 
> too hard.
> 
> And, at the risk of being flamed or sounding like a troll, this seems 
> like something that should be easy to do...other languages manage it 
> quite neatly. Up until this point I was really liking my exposure to 
> Python :-/
> 
> I wonder if there is any more magic that I'm missing, the thing is the 
> pkgutil method looks exactly like what I want, except for not executing 
> the additional __init__.py files in the added directories.
> 
> Thanks for the help so far Peter, if anyone has a prettier solution then 
> I'm all ears.
> 
> Cheers,
> 
>   n
> 
> 
> 
> 
> 

Maybe I'm missing something obvious, but it sounds like you are 
over-complicating the idea of inheritance.  Do you just want to create a 
subclass of the other class?

Cheers,
Cliff


From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 18:45:36 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 00:45:36 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163605942.995212.34630@m73g2000cwd.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<4run7sFskcrrU1@mid.individual.net>
	<1163605942.995212.34630@m73g2000cwd.googlegroups.com>
Message-ID: <455ba1a9$0$4218$426a74cc@news.free.fr>

walterbyrd a ?crit :
> Bjoern Schliessmann wrote:
> 
>>walterbyrd wrote:
>>
>>
>>>- PHP has a lower barrier to entry
>>
>>Which kind of barrier do you mean -- syntax, availability, ...?
> 
> 
> Putting php into a web-site is as easy as throwing some php code into a
> my html file, and maybe giving the file a php extension. I can get php
> hosting for $10 a year easy.
> 
> This may not be what you want for a major developement project,

Not even for a minor one. While one can write not-trivial applications 
in PHP, the kind of work this requires would greatly benefit from a real 
programming language (vs a Q&D web scripting language).

> but the
> barrier to entry is very low.
> 
Ok. This observation is very specific to web development. Python is a 
general purpose programming language. And from this POV, it's IMHO much 
easier to learn. And not only because you don't need Apache to use it.


From shuanyu at gmail.com  Sat Nov 25 07:12:08 2006
From: shuanyu at gmail.com (many_years_after)
Date: 25 Nov 2006 04:12:08 -0800
Subject: Try to stop thread Using flag
Message-ID: <1164456728.261093.184820@h54g2000cwb.googlegroups.com>

Hi,pythoners:

    I countered some problems when I try to stop threads using flag.
These are my some important codes:

#####  mythread.py
    def run(self):
        while self.addr != '':    ### text waiting for processing
            if not self.CONTINUE:   ### flag for thread ,means to exit
the RUN func or not
                break
            print self.name
            post(self.params, self.addr)  ### func to process the text
            self.addr = furl.readline().strip()


######  myapp.py
     def OnEndProcess(self, event):
       if self.threadList:
            for thread in self.threadList:
                thread.CONTINUE = False
#####   this func is an EVENT processor. When I press the END BUTTON ,
it will be caused.

    def OnBeginProcess(self, event):
            for i in range(num):
                if lines[i]!= '':
                    thread =
mythread.mythread('Thread'+str(i),lines[i], params)
                    self.threadList.append(thread)

            print '\n Starting Threads'

            for i in self.threadList:
                i.start()


######  this func is an EVENT processor. When I press the BEGIN BUTTON
, it will be caused.

By test I found this truely acts as supposed:thread exited the *run()*
func. But when I press the BEGIN BUTTON again, an Error was caused:
thread already started.
It's said that if the *run()* func is finished, the thread will become
dead. So how to interprete this?
Any solution?

Thanks.



From greg.kujawa at gmail.com  Tue Nov 28 20:40:54 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 28 Nov 2006 17:40:54 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
Message-ID: <1164764454.043697.125730@j72g2000cwa.googlegroups.com>


gavino wrote:
> wtf

You have to be trolling I would think. For most people I think they
would like to code in Python if they had a personal choice. But for
professional reasons they are likely forced to code in Java because of
the sheep mentality of the large corporate drone-dom that's out there.
To me, languages such as Smalltalk, Python, and Ruby allow the problems
to solve themselves in code that's easier to read and requires less
verbiage. Meanwhile all of Java's semicolons, curly braces, and
syntactical hoops leaves my fingers tired and my eyes crossed.



From mail at microcorp.co.za  Fri Nov 10 00:33:42 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 10 Nov 2006 07:33:42 +0200
Subject: Multithreaded C API Python questions
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
Message-ID: <034301c70496$a70cfc00$03000080@hendrik>

"Svein Seldal" <"svein at seldal dot com">wrote:
8<---------------------------------------------------
> I am dependent upon the ability to have to threads executing in python
> land at the same time. How can this be done?

call time.sleep(0.001) in each, as well as the main thread, to politely give the
rest a chance....

Fiddle with the sleep times in your setup to get the best performance - and
don't be misled into thinking that faster is better - its not always true -
there comes a point where the overhead of swapping  a thread consumes the total
resource of the process, and no work gets done.

- HTH

- Hendrik



From fredrik at pythonware.com  Mon Nov 13 09:39:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 15:39:44 +0100
Subject: Character Encodings and display of strings
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
Message-ID: <eja03g$ddm$1@sea.gmane.org>

"JKPeck" wrote:

>I am trying to understand why, with nonwestern strings, I sometimes get
> a hex display and sometimes get the string printed as characters.
>
> With my Python locale set to Japanese and with or without a # coding of
> cp932 (this is Windows) at the top of the file, I read a list of
> Japanese strings into a list, say, catlis.
>
> With this code
> for item in catlis:
>       print item
> print catlis
> print " ".join(catlis)
>
> the first print (print item) displays Japanese text as characters..
> The second print (print catlis) displays a list with the double byte
> characters in hex notation.
> The third print (print " ".join(catlis)) prints a combined string of
> Japanese characters properly.
>
> According to the print documentation,
> "If an object is not a string, it is first converted to a string using
> the rules for string conversions"
>
> but the result is different with a list of strings.

a list is not a string, so it's converted to one using the standard list representation
rules -- which is to do repr() on all the items, and add brackets and commas as
necessary.

for some more tips on printing, see:

    http://effbot.org/zone/python-list.htm#printing

</F> 





From sjmachin at lexicon.net  Sun Nov 26 17:28:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 14:28:12 -0800
Subject: Generating header information using ElementTree
In-Reply-To: <1164579522.671325.36260@14g2000cws.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
Message-ID: <1164580092.683593.76830@f16g2000cwb.googlegroups.com>


Craig wrote:
> Fredrik Lundh wrote:
>
> > Craig wrote:
> >
> > > I'm only new to Python so please bear with me.  I using ElementTree to
> > > generate an XML file that will reference a DTD and an XSL file.  The
> > > header information I want at the start of the file is as follows:
> > >
> > > <?xml version="1.0"?>
> > > <?xml-stylesheet type="text/xsl" href="test.xsl"?>
> > > <!DOCTYPE BobActivityLog SYSTEM "test.dtd">
> > >
> > > How do you add this header information to the tree
> >
> > to the file, you mean?  use print.
> >
> > </F>
>
> Thanks for the quick response.  Here is the code I am using to manually
> write to the file is:
>
>     outFile = open("record.xml", 'w')
>     outFile.write = ("<?xml version=\"1.0\"?>\n")

outFile.write is a *method* that you call to write your string, not
some sort of magic gadget that writes stuff as a side-effect of being
assigned to. Simply do this:

outFile.write("<?xml version=\"1.0\"?>\n")

and (of course) fix the following similar problems.


>     outFile.write = ("<?xml-stylesheet type=\"text/xsl\"
> href=\"test.xsl\"?>\n")
>     outFile.write = ("<!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n")
>     outFile.close()
>
> When I run the code I get the following error message:
>
> Traceback (most recent call last):
>   File "bob-xml.py", line 189, in <module>
>     main()
>   File "bob-xml.py", line 173, in main
>     outFile.write = ("<?xml version=\"1.0\"?>\n")
> AttributeError: 'file' object attribute 'write' is read-only
>

If that were permitted, you'd be replacing the  method with a string!

HTH,
John



From f.braennstroem at gmx.de  Sat Nov  4 05:41:35 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 4 Nov 2006 11:41:35 +0100
Subject: small python cgi webserver
References: <mailman.1760.1162630079.11739.python-list@python.org>
	<1162635479.491109.15640@h54g2000cwb.googlegroups.com>
Message-ID: <eihqou$j3c$1@sea.gmane.org>

Hi,

* ArdPy <ardsrk at gmail.com> wrote:
>
> Fabian Braennstroem wrote:
>> Hi,
>>
>> I am looking for a small python script, which starts a small
>> web server with python cgi support on a linux machine.
>>
>> I tried:
>>
>>
>>   #!/usr/bin/env python
>>   import sys
>>   from CGIHTTPServer import CGIHTTPRequestHandler
>>   import BaseHTTPServer
>>
>>   class MyRequestHandler(CGIHTTPRequestHandler):
>>       # In diesem Verzeichnis sollten die CGI-Programme stehen:
>>       cgi_directories=["/home/fab/Desktop/cgi-bin"]
>>
>>
>>   def run():
>>       # 8000=Port-Nummer
>>       #   --> http://localhost:8000/
>>       # Fuer http://localhost/
>>       #   Port-Nummer auf 80 setzen
>>       httpd=BaseHTTPServer.HTTPServer(('', 8000), MyRequestHandler)
>>       httpd.serve_forever()
>>
>>   if __name__=="__main__":
>>       print "Starting Server"
>>       run()
>>
>> but when I want to test a small python cgi test file:
>>
>>
>>   #!/usr/bin/python
>>   # -*- coding: UTF-8 -*-
>>
>>   # Debugging f?r CGI-Skripte 'einschalten'
>>   import cgitb; cgitb.enable()
>>
>>   print "Content-Type: text/html;charset=utf-8\n"
>>   print "Hello World!"
>>
>> I just get the text and not the html output. The file's mode
>> is 755.
>>
>> Is there anything wrong with the webserver script or do I do
>> something completely wrong? Maybe, you have a different
>> webserver script?
>>
>> Greetings!
>>  Fabian
>
> Probably the server is not executing your CGI script. If it is the
> Apache web server that you are using then just ensure the following
> settings in your /etc/httpd/conf/httpd.conf file is exactly like
> following:
>
> <Directory "/var/www/cgi-bin">
>     AllowOverride None
>     Options ExecCGI
>     Order allow,deny
>     Allow from all
> </Directory>

Maybe, I understood something wrong, but I thought that the
above 'webserver' script would replace apache in my case; at
least I hoped!?

Greetings!
 Fabian



From dingbat at codesmiths.com  Wed Nov 15 11:02:37 2006
From: dingbat at codesmiths.com (Andy Dingley)
Date: 15 Nov 2006 08:02:37 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
Message-ID: <1163606557.269571.184810@h54g2000cwb.googlegroups.com>


walterbyrd wrote:

> I don't know if this is a fair comparison or not.

Who cares?  Anything involving PHP is a "billion flies can't be wrong"
type of statement.

I agree completely with your observation about PHP's lower cost of
access. This is ostensibly a good thing, but it also means that every
software-ignorant newbie dives straight into PHP and ten minutes later
they're a guru.  The average quality of PHP developers is rock-bottom
and the average quality of PHP code is about the same. I don't like the
language either, but it's the use PHP is put to that spoils most of it,
more than language features itself.



From kzuberi at gmail.com  Fri Nov 24 12:18:32 2006
From: kzuberi at gmail.com (Khalid Zuberi)
Date: Fri, 24 Nov 2006 17:18:32 +0000 (UTC)
Subject: Modules - Jython Vs Python?
References: <1164362564.763699.313360@45g2000cws.googlegroups.com>
Message-ID: <loom.20061124T181431-759@post.gmane.org>

Patrick Finnegan writes:

> 
> How many of the Python modules written in C have been rewritten and and
> ported to Java to run under Jython? I am talking about SMTP, LDAP,
> WIN2K,XML etc.  Is there a list anywhere ?
> 

There's a list on the jython wiki of absent modules:

  http://wiki.python.org/jython/AbsentModules

though i can't vouch for it being up to date.

- kz







From rpdooling at gmail.com  Fri Nov 24 22:17:42 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 24 Nov 2006 19:17:42 -0800
Subject: synching with os.walk()
In-Reply-To: <d2317$456767a7$544aba09$1434@news.hispeed.ch>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<d2317$456767a7$544aba09$1434@news.hispeed.ch>
Message-ID: <1164424662.095958.120610@l39g2000cwd.googlegroups.com>

Antoine De Groote wrote:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/191017
> might be what you are looking for, or at least a starting point...
>

There's an updated version of this script at pages 403-04 of the Python
Cookbook 2nd Edition.

rd



From sarcasticzombie at gmail.com  Wed Nov 29 11:33:53 2006
From: sarcasticzombie at gmail.com (Sarcastic Zombie)
Date: 29 Nov 2006 08:33:53 -0800
Subject: Overloading "if object" unary operator
In-Reply-To: <ekkc9b$hi7$02$1@news.t-online.com>
References: <1164817022.500511.295260@80g2000cwy.googlegroups.com>
	<ekkc9b$hi7$02$1@news.t-online.com>
Message-ID: <1164818033.693242.22030@n67g2000cwd.googlegroups.com>



On Nov 29, 11:26 am, Peter Otten <__pete... at web.de> wrote:
> Sarcastic Zombie wrote:
> > is there any way to overload the 'if' unary usage to detect if a
> > variable has a value?Define a __nonzero__() or __len__() method.
>
> Peter

Thanks to both of you, it worked perfectly. I must have missed it in
the documentation somehow.

-Jason Ledbetter



From vania.cIlli at gmail.com  Fri Nov 24 07:33:47 2006
From: vania.cIlli at gmail.com (Vania)
Date: 24 Nov 2006 04:33:47 -0800
Subject: socket.error connection refused
In-Reply-To: <ek6g9v$sb7$1@news.albasani.net>
References: <1164283758.225074.9810@h54g2000cwb.googlegroups.com>
	<ek6g9v$sb7$1@news.albasani.net>
Message-ID: <1164371627.124748.69380@k70g2000cwa.googlegroups.com>


Thanks for the explanation.
Probably the fact that I was working inside a virtual machine
didn't help.

Vania

robert ha scritto:

> Vania wrote:
> > Hi, I'm not sure this is the proper forum but I try nevertheless.
> > The problem I'am facing is that the socket library always fail to
> > connect to an URL. The net effect is that I can not use setuptools.
> > I'm using Python2.4 on a windows XPPRO Sp2 machine.
> > The firewall is disabled.
> > There is no NLTM proxy.
> > I connect to the internet through a NAT server (and it works).
> > Other than with easy_install I tried to connect to a number of external
> > urls
> > (all of them running) and even to localhost,
> > directly in script using urllib
> > and the error is always the same errno:  10061 connection refused.
> > Any ideas?
>
>
> urllib.urlopen can pick up an invalid proxy setting from environ or IE-settings.
>
> routers/NAT servers sometimes need a 2nd tick - all browsers try it 2..4 times before displaying "no connection" - this is (unfortunately) not the default behavior of the "browser" urllib.
>
> if bare
>
> >>> import httplib
> >>> h=httplib.HTTPConnection('www.google.com')
> >>> h.connect()
> >>> h.request('GET','/')
> >>> h.getresponse().read()
> '<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">\n<TITLE>302 Moved</TITLE></HEAD><BODY>\n<H1>302 Moved</H1>\nThe document has moved\n<A HREF="http://www.google.de/">here</A>.\r\n</BODY></HTML>\r\n'
> >>>
>
> fails on multiple trials, then you have a very strange network setup. maybe multiple/confusing NIC's ...
> 
> 
> Robert



From richie at entrian.com  Thu Nov 30 07:13:28 2006
From: richie at entrian.com (Richie Hindle)
Date: Thu, 30 Nov 2006 12:13:28 +0000
Subject: why would anyone use python when java is there?
In-Reply-To: <1164887401.610800.190370@f1g2000cwa.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164818505.696250.264070@h54g2000cwb.googlegroups.com>
	<mailman.877.1164885636.32031.python-list@python.org>
	<1164887401.610800.190370@f1g2000cwa.googlegroups.com>
Message-ID: <bfitm2dnjmoia50mvgm6dpjjvof6340liq@4ax.com>


[Adam]
> For the life of me I can't understand why he would troll
> comp.lang.python when comp.lang.lisp is there.

[Richie]
> +1 QOTW!

[Paul]
> Overruled! ;-)
> 
> Mostly because comp.lang.lisp seems to have become a much better place
> to get quotes of the week about Python than comp.lang.python itself.

Point taken... but had Adam said "For the life of me I can't understand why
he would troll comp.lang.python when the rest of usenet is there" I would
have still voted QOTW.  It was a pro-comp.lang.python vote, not an
anti-comp.lang.lisp vote.  8-)

-- 
Richie Hindle
richie at entrian.com


From tuomas.vesterinen at pp.inet.fi  Tue Nov  7 09:54:55 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Tue, 07 Nov 2006 14:54:55 GMT
Subject: forwarding *arg parameter
In-Reply-To: <pan.2006.11.07.01.21.17.654906@REMOVE.THIS.cybersource.com.au>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi> <2Fp3h.195$7b6.100@read3.inet.fi>
	<eilc3m$301a$1@ulysses.news.tiscali.de>
	<y2r3h.244$7b6.238@read3.inet.fi>
	<pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>
	<%oG3h.107$8a7.65@read3.inet.fi>
	<pan.2006.11.07.01.21.17.654906@REMOVE.THIS.cybersource.com.au>
Message-ID: <3714h.172$mz.3@read3.inet.fi>

Steven D'Aprano wrote:
> On Mon, 06 Nov 2006 13:03:55 +0000, Tuomas wrote:
> 
> 
>>If you read the whole chain you find out what we were talking of.
> 
> 
> I had already read the whole thread, and I've read it again in case I
> missed something the first time, and I still have no idea why you think
> you need to do this. You explain *what* you want to do, but not *why* you
> want to do it.

Redirecting a funtion parameter to an other function is a quite common 
situation in programming. Here the question was forwarding *args 
parameter. Have you ever tried this and found the difference in cases:

def f(*args):
     x = g(args)  # how g sees arguments in this case
     x = g(*args) # and how it sees them in this case

I am happy with what Dennis Lee Bieber wrote in the second latest node 
in this chain. So luckily my "flattern" is not needed because the 
problem I had can be solved in the calling function.

TV


From tjreedy at udel.edu  Mon Nov 20 04:05:50 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Nov 2006 04:05:50 -0500
Subject: trying to create a dictionary in python,
	using variables as a value
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
Message-ID: <ejrr5e$9qr$1@sea.gmane.org>


"ronrsr" <ronrsr at gmail.com> wrote in message 
news:1164008459.159792.48600 at k70g2000cwa.googlegroups.com...
> but I keep getting syntax errors on this one -
>
>
>
> adict = {'zid': result[0][0], 'keywords': result{0][1],

The interpreter puts a ^ under the char where it sees a problem.
Cut and paste above into IDLE shell and it will highlight the problem.
Or just read carefully again ;-)


Terry Jan Reedy





From shuanyu at gmail.com  Sat Nov 25 10:14:20 2006
From: shuanyu at gmail.com (many_years_after)
Date: 25 Nov 2006 07:14:20 -0800
Subject: How to Restart a thread
Message-ID: <1164467660.760671.145440@j44g2000cwa.googlegroups.com>

class mythread(threading.Thread):
    def __init__(self, threadname):
        threading.Thread.__init__(self, name = threadname)

    def run(self):
        print 'i am running'
        print 'i quit run()'

thread  = mythread('1')
thread.start()
print threading.activeCount()  ## 1 , this means the thread is active
if not thread.isAlive():
    print 'i am dead,you can restart'   ### OK, this is executed. this
means the thread is no alive
    thread.start() #### " thread already started "

This program presentes that the thread quit the *run()* func and is
active but not alive.   How to understand this? It is said if the
thread quit the *run()* func , it's dead.
how to restart it ?

Thanks



From jonas.esp at googlemail.com  Thu Nov 23 17:09:21 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 23 Nov 2006 14:09:21 -0800
Subject: Access to variable from external imported module
In-Reply-To: <mailman.656.1164317994.32031.python-list@python.org>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
Message-ID: <1164319761.451409.196660@j44g2000cwa.googlegroups.com>

Sorry, I mean access to local variable from a method

import module
method(value)

I would to access to values that are created locally in that method

Fredrik Lundh ha escrito:

> GinTon wrote:
>
> > How to access to a variable (that value is not returned) from a module
> > imported?
> > And the variable is set at the module-level.
>
>    import module
>    print module.variable
> 
> (have you read the Python tutorial?)
> 
> </F>



From ptmcg at austin.rr._bogus_.com  Wed Nov  8 16:11:36 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 08 Nov 2006 21:11:36 GMT
Subject: Strange re problem on OSX but Not Linux
References: <1163008904.817018.186000@h54g2000cwb.googlegroups.com>
	<mailman.1932.1163019917.11739.python-list@python.org>
Message-ID: <cKr4h.679$mR4.350@tornado.texas.rr.com>

"Gabriel Genellina" <gagsl-py at yahoo.com.ar> wrote in message 
news:mailman.1932.1163019917.11739.python-list at python.org...
> Dont use regex as a name. Also, do you have any script called "re.py" 
> hidding that library module? or regex.py?

My bet is that a local re.py is masking the lib module.  (It's a shame this 
error is so easy to trip over.)

-- Paul




From wiggly at wiggly.org  Tue Nov 21 13:50:01 2006
From: wiggly at wiggly.org (Nigel Rantor)
Date: Tue, 21 Nov 2006 18:50:01 +0000
Subject: How good is CORBA?
In-Reply-To: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
Message-ID: <45634A59.5080501@wiggly.org>

Sai Krishna M wrote:
> Hi everybody,
> 
> i have been developing web based applications using python+cheetah.
> 
> The numbers are increasing. The applications have many common parts of
> code. Though these applications are separate from each other they are
> run in the same server.
> 
> I heard about CORBA... but also heard that it has some flaws...like
> the programming being very complicated.
> Also heard that CORBA is no more used these days...
> 
> Can someone suggest me a better option or is corba fine?

This is an extremely loaded question and you're liable to get many 
differing opinions.

What follows is just my opinion, I don't want to get into any religious 
wars.

CORBA is a large, complex system that allows you to do object-RPC 
efficiently and in many different languages.

Web services are now converging on the same solutions as the OMG did 
with CORBA because they are solving the same problems.

If you need to access someone else's services then web services with 
XML-RPC/SOAP/REST is probably a great idea.

If you have any kind of need for performance, or if all of your 
interfaces are internal then I would choose CORBA.

I am currently building a system with a mixture of CORBA/SOAP interfaces 
because of these trade-offs.

If you don't like CORBA, but want to do efficient object-RPC and don't 
mind paying for it then perhaps look at Ice from www.zeroc.com, they're 
a bunch of good guys who were big CORBA people and decided to go make an 
object-RPC mechanism without the cruft that CORBA gathered.

Despite the fact that some very bad decisions were made about what to 
include in CORBA you don't *have* to use any of the braindead features.

If you have any more specific questions then let me know, this is just 
my quick 0.02c

Regards,

   n



From bugracakir at gmail.com  Wed Nov  8 07:19:56 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Wed, 8 Nov 2006 14:19:56 +0200
Subject: Web Browser Pythonlet
Message-ID: <5a00f6240611080419j3d32cd90v9b9064b5c9621747@mail.gmail.com>

Hi,

I'm wondering if there is an environment for any web browser that executes
python code
and running a gui inside the web browser like applet, flash or like those ?
Thanks
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From fredrik at pythonware.com  Thu Nov 16 14:18:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 20:18:49 +0100
Subject: Heap Memory
In-Reply-To: <312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>	<ejia35$cfk$1@sea.gmane.org>
	<312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
Message-ID: <ejidip$ts$1@sea.gmane.org>

Gregory Pi?ero wrote:

> This computer it was running on has 2GB of RAM and 6GB of virtual
> memory so I really doubt I had used up all of that memory.  I didn't
> watch it the whole time so I can't be sure though.  Any ideas what
> could have been going on there?

bogus configuration?

     http://online.effbot.org/2006_10_01_archive.htm#20061004

</F>



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov  3 20:44:22 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Nov 2006 12:44:22 +1100
Subject: Timing a function object versus timeit
Message-ID: <pan.2006.11.04.01.44.21.971767@REMOVE.THIS.cybersource.com.au>

The timeit module is ideal for measuring small code snippets; I want to
measure large function objects.

Because the timeit module takes the code snippet argument as a string, it
is quite handy to use from the command line, but it is less convenient for
timing large pieces of code or when working in the interactive
interpreter. E.g. variations on this *don't* work:

$ python
Python 2.4.3 (#1, Jun 13 2006, 11:46:08)
[GCC 4.1.1 20060525 (Red Hat 4.1.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> def foo(x):
...     return x+1
...
>>> assert foo(1) == 2 # do lots of interactive testing
>>> 
>>> import timeit
>>> timeit.Timer("foo(1)").timeit()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/timeit.py", line 161, in timeit
    timing = self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
NameError: global name 'foo' is not defined
>>>

One solution is to work like this:

>>> foo_str = """def foo(x):
...     return x+1
... """
>>> exec foo_str
>>> assert foo(1) == 2
>>> timeit.Timer("foo(1)", foo_str).timeit(10000)
0.006793975830078125

Not so useful if you are timing functions from existing code, and very
easy to get foo_str and foo out of sync.

One solution is to resign oneself that timeit is just no good for timing
actual function objects, and to resort to writing ad hoc and potentially
buggy timing code any time you want to time a function:

>>> import time
>>> def timer(n=10000):
...     _it = [None]*n
...     t = time.time()
...     for _ in _it:
...             foo(1)
...     t = time.time() - t
...     return t
...
>>> timer()
0.0082669258117675781

That's hardly best practice -- good enough for rough and ready "how fast
is this?" but not scalable beyond one or two functions.

Do others have other suggestions or techniques they use?


I thought I could write a function, similar to the timeit.Timer.timeit()
method, which would take a function object instead of a string, plus
arbitrary arguments, and carefully time how long it takes to execute. I
ended up with something like this:

def ftimer(func, args, kwargs, number=1000000, timer=time.time):
    it = itertools.repeat(None, number)
    gc_saved = gc.isenabled()
    gc.disable()
    t0 = timer()
    for i in it:
        func(*args, **kwargs)
    t1 = timer()
    if gc_saved:
        gc.enable()
    return t1 - t0

(Aside: I should put the timing code in a try block, with the gc
restoration code under finally. Next version.)

Much to my surprise, this seems to give me elapsed times about double that
of timeit, at least for small functions that do little work.

I expected that executing the function would be faster than the timeit
module, which goes to show how badly off my intuition regarding the
overhead of timeit was.

I presume the problem is that the time it takes to unroll the *args and
**kwargs is making a significant difference to the time taken. But even if
I remove those arguments, and just call functions that take no arguments,
there is still a significant difference. My ftimer results are
consistently 10-20% longer than timeit. Example:

>>> setup_null = """def null():
...     return
... """
>>> exec setup_null
>>> timeit.Timer("null()", setup_null).timeit()
0.7631678581237793
>>> ftimer(null, [], {})
1.8860080242156982
>>> ftimer2(null)  # version that doesn't pass *args and **kwargs
0.90903997421264648


Can anyone help me understand these results? Why is the overhead
associated with timeit apparently so much smaller than the overhead in my
ftimer functions?

Am I barking up the wrong tree here? Is there a flaw in my reasoning, and
I'm measuring execution time the wrong way? 

Or is it that the timeit module and my ftimer functions are measuring
subtly different things?



-- 
Steven.



From mike at hobbshouse.org  Mon Nov 13 13:51:47 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 12:51:47 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej35ue$52k$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>
	<ej35ue$52k$1@sea.gmane.org>
Message-ID: <4558BEC3.3020003@hobbshouse.org>

Ron Adam wrote:
> LOL,  of course it would.  I would expect that too after a suitable amount of 
> 'brain washing', oops, I mean training and conditioning. ;-)
>   
Trust me, my brain is quite filthy and doesn't wash easily. I do 
appreciate aesthetics, which is why still stay with Python, even after 
programming in Ruby for several months. I've used Java/C/C++ for years, 
yet I make no complaint about the lack of static typing in Python. Even 
so, I'd like to think that I know a good thing when I see it.
> The point is what is more natural to "read" with a minimum amount of 
> explanation. I would think for most people who are learning programming for the 
> first time, it is things that resemble things they already know.  Such as 
> outlining with colons.
>
> Leaving the colon out probably would feel more natural for writing once you get 
> used to it.  After all it is a bit less typing.   But I don't think it would be 
> the most readable choice for most people.  It's probably a trade off, 
> readability vs writability.  Another python development guideline is to favor 
> readability over writability on the presumption we tend to write code once, but 
> read code many times.
>   
Not to repeat myself from an earlier post, but any pretense that 
Python's primary objective is readability went out the window with the 
invention of such constructs as "__del__", "__repr__", and 
"super(MyClass, self).__init__()". There are obviously other goals to 
the language's development that inspired these constructs and override 
the priority of readability.

> Here's an alternative test.  Write a program to remove all the end of line 
> colons from pythons library and then write another separate program to put them 
> back in.  Will it miss any?  will it pass the python test suite?
>   
I just may take you up on that. ;-) Not for a few days, though. Not 
enough time right now.

- Mike



From rpdooling at gmail.com  Wed Nov  8 21:27:02 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 8 Nov 2006 18:27:02 -0800
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <1163028931.055027.170040@h48g2000cwc.googlegroups.com>
References: <1163028931.055027.170040@h48g2000cwc.googlegroups.com>
Message-ID: <1163039222.045805.261350@m7g2000cwm.googlegroups.com>


NicolasG wrote:
> How can I use python to get the real IP address of my DSL router

http://whatismyip.com

rd



From bray at sent.com  Tue Nov  7 12:36:47 2006
From: bray at sent.com (bray at sent.com)
Date: Tue, 07 Nov 2006 11:36:47 -0600
Subject: ChiPy Monthly Meeting, Thursday 7:00 pm.
Message-ID: <1162921007.26531.275231865@webmail.messagingengine.com>

Thursday November 9 2006. 7:00 pm.

This may be our best meeting yet. This is our regular Thurs. meeting. In
addition stay tuned for a special meeting to welcome Ed Leafe 
http://chipy.org/EdOnDabo.

Please ping the list to tell us what you want to address in your
lightning talk. Lets try to get one talk from each brave soul for about
5 minutes
a piece.

Topics
------

- Python Mock Library - fawad
- Web log generation and parsing
- lightning talks

Location
--------

Daisychain - 2159 W 21st Pl, Chicago il 60608 http://www.dai5ychain.net/
map - http://tinyurl.com/ybdcxb

About ChiPy
-----------

ChiPy is a group of Chicago Python Programmers, l33t, and n00bs.
Meetings are held monthly at various locations around Chicago.
Also, ChiPy is a proud sponsor of many Open Source and Educational
efforts in Chicago. Stay tuned to the mailing list for more info.

ChiPy website: <http://chipy.org>
ChiPy Mailing List: <http://mail.python.org/mailman/listinfo/chicago>
Python website: <http://python.org>

---




From spe.stani.be at gmail.com  Mon Nov 13 20:23:05 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 13 Nov 2006 17:23:05 -0800
Subject: SPE bug?
In-Reply-To: <4553ac8a@quokka.wn.com.au>
References: <4553ac8a@quokka.wn.com.au>
Message-ID: <1163467385.690052.320520@i42g2000cwa.googlegroups.com>

timmy schreef:

> i can't paste from SPE into an xterm window. is this problem with SPE?

No the problem is with the wxPython binding of stc (scintilla). It
happens with the wxPython demo as well. I'll ask on the wxpython-users
mailing list.

Stani



From gagsl-py at yahoo.com.ar  Sat Nov 11 02:46:58 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 11 Nov 2006 04:46:58 -0300
Subject: Inheritance Question
In-Reply-To: <1163226712.585220.53550@f16g2000cwb.googlegroups.com>
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
	<1163226712.585220.53550@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061111042344.038b3a58@yahoo.com.ar>

At Saturday 11/11/2006 03:31, Frank Millman wrote:

>Continuing your analogy of animals, assume a class A with a 'walk'
>method and an 'eat' method.
>
>Most animals walk the same way, but a few don't, so I create a subclass
>AW and override the walk method.
>
>Most animals eat the same way, but a few don't, so I create a subclass
>AE and override the eat method.
>
>How do I create an instance of an animal that both walks and eats
>differently?
>
>This is how I do it at present.
>
>class A(object):  # walks normally, eats normally
>     def walk(self):
>         normal walk
>     def eat(self):
>         normal eat
>
>class AW(A):  # walks differently, eats normally
>     def walk(self):
>         different walk
>
>class E(object):  # abstract class
>     def eat(self):
>         different eat
>
>class AE(E,A):  #  walks normally, eats differently
>     pass
>
>class AWE(E,AW):  #  walks differently, eats differently
>     pass
>
>So I use multiple inheritance instead of subclassing to override the
>eat method. It works, but it feels ugly. Is there a cleaner solution?

Answer 1) Move *both* ways of walk, and *both* ways of eating, to 
another base class. Best when this is pure behavior - no new 
attributes are involved.

class A(object):  # does not know how to walk, neither how to eat
     def walk(self):
         raise NotImplemented
     def eat(self):
         raise NotImplemented

class WalkNormallyCapability(object):  # knows how to walk normally
     def walk(self):
         normal walk

class WalkDifferentCapability(object):  # knows how to walk different
     def walk(self):
         different walk

class EatNormallyCapability(object):    # knows how to eat normally
     def eat(self):
         normal eat

class EatDifferentCapability(object):  # knows how to eat different
     def eat(self):
         different eat

class 
AWnEn(A,WalkNormallyCapability,EatNormallyCapability):  #  walks 
normally, eats normally
     pass

class 
AWdEn(A,WalkDifferentCapability,EatNormallyCapability):  #  walks 
different, eats normally
     pass
...etc.

The xxxCapability classes are usually referred as "mixin class" - 
they add a new capability to an existing class, without adding new 
attributes (they could, but initialization gets more complicated, you 
must rewrite __init__ and so...). They may inherit from a common base 
class, too, but that's not required in Python.


Answer 2) Use an instance of another class to define how to walk and 
how to eat. Advantage: it can later be modified at runtime (strategy pattern).

class A(object):
     def __init__(self, walker, eater):
         self.walker=walker
         self.eater=eater
     def walk(self):
         self.walker.walk()
     def eat(self):
         self.eater.eat()

class NormalWalker(object):  # knows how to walk normally
     def walk(self):
         normal walk

class DifferentWalker(object):  # knows how to walk different
     def walk(self):
         different walk

class NormalEater(object):    # knows how to eat normally
     def eat(self):
         normal eat

class DifferentEater(object):  # knows how to eat different
     def eat(self):
         different eat

a=A(NormalWalker(), DifferentEater())
or define a factory function when you decide which walker an which 
eater to use based on its arguments. As above, they may inherit from 
a common base class (Walker, Eater, by example).



-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From kevin.dahlhausen at gmail.com  Wed Nov  1 15:38:41 2006
From: kevin.dahlhausen at gmail.com (kpd)
Date: 1 Nov 2006 12:38:41 -0800
Subject: Remote Objects via CGI?
In-Reply-To: <4qrto9FnvnaqU1@uni-berlin.de>
References: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>
	<4qrto9FnvnaqU1@uni-berlin.de>
Message-ID: <1162413520.985353.272940@e64g2000cwd.googlegroups.com>

I did not have much hope, but thought there might be something.  I was
thinking of going this route to get a very quick solution to a python
fat-client adding to or retrieving objects from a community repository
over http.

XMLRpc could work if there is a CGI solution, although the data sets do
not lend themselves to XML.  They are tuples of 6 floats about 2000 to
a data set.

I did just find out today that CherryPy can support different apps in
'branches' so that may be the right way to go.

Might just have to do it the right way with a real CGI app.



From steve at holdenweb.com  Wed Nov  8 13:55:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 12:55:51 -0600
Subject: Delivering data to python from a c-thread
In-Reply-To: <F9Gdnbl3uKqPhc_YRVnzvQ@telenor.com>
References: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>	<mailman.1908.1163004405.11739.python-list@python.org>
	<F9Gdnbl3uKqPhc_YRVnzvQ@telenor.com>
Message-ID: <eit95e$sab$1@sea.gmane.org>

Svein Seldal wrote:
> Steve Holden wrote:
> 
>> Could you have the Python code create a second Python thread and have it 
>> call back into the C code to collect any waiting data?
> 
> Well yeah, in principle. However one would need some synchronization 
> mechanisms anyway. The C data source is generating asynch. messages to 
> deliver to python and thus the py thread must be ready to wait for it. 
> It will add another thread in the total application (cuz' I cant remove 
> the extra C thread since it has other important tasks), but I'll give it 
> a shot at least!
> 
OK. I was just thinking that, with Python threads, communication using 
Queue.Queue is thread-safe and will handle the GIL, so that way you only 
have the problem of how to synchronize your C code when it receives the 
callback from the Python thread.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Mon Nov 13 15:35:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 21:35:17 +0100
Subject: tab compleation input
In-Reply-To: <1163446215.993860.325430@h48g2000cwc.googlegroups.com>
References: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>	<1163441927.046482.218330@e3g2000cwe.googlegroups.com>
	<1163446215.993860.325430@h48g2000cwc.googlegroups.com>
Message-ID: <ejaku5$428$2@sea.gmane.org>

Eli Criffield wrote:

> Not sure what your trying to do, but it doesn't work. :)
> valid doesn't exsist

it's assigned to by the for-in loop, and is only used inside it.

> Either way, it doesn't take the tab tell after you hit enter, Not
> really what i was getting at. What i want is like a bash shell prompt.

you can use the "readline" module with a custom completer class.  see 
the second example on this page:

     http://effbot.org/librarybook/readline.htm

</F>



From laurent.pointal at limsi.fr  Fri Nov 17 03:52:35 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 17 Nov 2006 09:52:35 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
Message-ID: <ejjtd1$8gp$1@upsn250.cri.u-psud.fr>

gabor a ?crit :
> hi,
> 
> from the documentation (http://docs.python.org/lib/os-file-dir.html) for
> os.listdir:
> 
> "On Windows NT/2k/XP and Unix, if path is a Unicode object, the result
> will be a list of Unicode objects."

Maybe, for each filename, you can test if it is an unicode string, and
if not, convert it to unicode using the encoding indicated by
sys.getfilesystemencoding().

Have a try.

A+

Laurent.


From mnations at gmail.com  Tue Nov 14 11:45:52 2006
From: mnations at gmail.com (Mudcat)
Date: 14 Nov 2006 08:45:52 -0800
Subject: Tkinter: Strange behavior using place() and changing cursors
In-Reply-To: <slrneljmv7.1kp.wojciech_mula@cat.tac>
References: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
	<slrneljmv7.1kp.wojciech_mula@cat.tac>
Message-ID: <1163522752.447520.86910@k70g2000cwa.googlegroups.com>


Wojciech Mula wrote:
> Mudcat wrote:
> > [...]
>
> You have to set cursor once, Tk change it automatically:
>
> > 	def buildFrame(self):
> > 		self.f = Frame(self.master, height=32, width=32, relief=RIDGE,
> > borderwidth=2)
> > 		self.f.place(relx=.5,rely=.5)
>  		#self.f.bind( '<Enter>', self.enterFrame )
>  		#self.f.bind( '<Leave>', self.leaveFrame )
>  		self.f.configure(cursor = 'sb_h_double_arrow')


The problem is I need the ability to change it dynamically. I don't
want the cursor to be the double_arrow the whole time the mouse hovers
inside that frame. It's supposed to be a resize arrow when the mouse is
on the frame border, and regular cursor once it passes to the inner
part of the frame.

Unless there is a better way to do this, I have written code to
determine if the mouse is on the edge or not. There doesn't seem to be
a 'mouseover' type event to determine if the mouse is currently on the
frame border itself. As a result, I calculate the position of the mouse
and set the cursor appropriately.

I have also determined that this is not a problem if the button is not
packed inside the frame.  So somehow the interaction of the internal
button is causing this problem.



From steve at ferg.org  Fri Nov  3 11:00:15 2006
From: steve at ferg.org (Steve)
Date: 3 Nov 2006 08:00:15 -0800
Subject: Tools for Java/Python scripting
Message-ID: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>

I have added a page to the wiki, listing  tools for Java-Python
scripting (Java-Python interoperability).

http://wiki.python.org/moin/Java_Scripting

I have included information about all of the tools that I could find.
If you know others, please add information about them to the page.



From jonas.esp at googlemail.com  Tue Nov 21 08:14:46 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 21 Nov 2006 05:14:46 -0800
Subject: Load objects using __import__
Message-ID: <1164114886.356071.14990@k70g2000cwa.googlegroups.com>

I load objects from a file (to django framework _but it's a python
question_).

1) Before I used this
    from project.I18n.models import *

And to load the object
    c1 = Country(name="Afghanistan")

But the problem is that there is to edit 'project' manually.

2) So I setup the environment and import the module:
    project_directory = os.path.abspath('')
    project_name = os.path.basename(project_directory)
    os.environ['DJANGO_SETTINGS_MODULE'] = "%s.settings" % project_name
    sys.path.append(os.path.dirname(project_directory))
    module = __import__('%s.I18n.models' % (project_name), {}, {},
[''])
    sys.path.pop()

It's all correct until here and to checking it I run:
    print i18n_module
    <module 'project.I18n.models' from
'/home/lala/django/project/I18n/models.pyc'>

    print i18n_module.Country
    <class 'project.I18n.models.Country'>

But when I load the object I get
    SyntaxError: invalid syntax

    c1 = <module 'project.I18n.models' from
'/home/lala/django/project/I18n/models.pyc'>.Country(name="Afghanistan")

Any idea?



From horpner at yahoo.com  Thu Nov  9 15:35:35 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Nov 2006 21:35:35 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
Message-ID: <slrnel74ak.18g.horpner@FIAD06.norwich.edu>

On 2006-11-09, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Michael Hobbs wrote:
>> Anyway, the FAQ answer seems to be a weak argument to me.
>
> I agree. I was expecting something more technical to justify
> the colon, not just that it looks better.

I think it is outstanding that the colon's justification is
asthetic rather than technical (though I too had expected to see
a technical excuse for it).

-- 
Neil Cerutti


From tim at tdw.net  Wed Nov  8 18:54:43 2006
From: tim at tdw.net (Tim Williams)
Date: Wed, 8 Nov 2006 23:54:43 +0000
Subject: help using smtplib to work ..
In-Reply-To: <R57127071.468.21846.1@mxextra>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<455263B5.9080704@websafe.com> <R57127071.468.21846.1@mxextra>
Message-ID: <9afea2ac0611081554l56e8da5hfa4dd43c02e76a73@mail.gmail.com>

On 8 Nov 2006 15:31:27 -0800, NicolasG <nicolasg at gmail.com> wrote:
>
> > <snip from Gmail SMTP setup instructions>
> >
> > Under outgoing mail smtp server, use smtp.gmail.com. Since it requires SMTP
> > authorization, use your Gmail account as username (e.g. yourname at gmail.com) and
> > your Gmail password as password. You can turn TSL on or off.
> >
> > <end snip>
> >
> > The email server requires authentication before it can send.
> > Normally this can be accomplished either by calling
> >
> Actually I used alt1.gmail-smtp-in.l.google.com for a server I don't
> need authentication. The problem is that for some mail addresses I can
> send mail's while for other's I can't . I don't know how to explained
> that.....

Without authentication, you will only be able to send to the severs
local addresses eg ... at gmail.com  ... at googlemail.com

> > The only alternative is to use an open relay email server that allows
> > you to send without authenticating.  Hope info at least points you in
> > the right direction.

or you can probably use your ISP's outgoing mail server, which usually
won't require authentication.

HTH :)


From paul at boddie.org.uk  Tue Nov 14 06:28:08 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Nov 2006 03:28:08 -0800
Subject: PyFAQ: anyone seen aahz' thread tutorial ?
References: <mailman.128.1163502991.32031.python-list@python.org>
Message-ID: <1163503688.391377.191690@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
> and yes, has anyone seen Aahz or his OSCON2001 thread tutorial slides
> lately ?  as noticed here:
>
>      http://effbot.org/pyfaq/how-do-i-program-using-threads.htm
>
> they have disappeared from the starship?  any ideas where to look for them ?

The Internet Archive (the rewind button of the Internet):

http://web.archive.org/web/20050729075144/http://starship.python.net/crew/aahz/OSCON2001/

Paul



From mblume at socha.net  Sun Nov 12 07:40:58 2006
From: mblume at socha.net (Martin Blume)
Date: Sun, 12 Nov 2006 13:40:58 +0100
Subject: Why does this code crash python?
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
Message-ID: <455715b3$0$2581$5402220f@news.sunrise.ch>

<Mythmon at gmail.com> schrieb 
> I am trying to make a program that will basically simulate 
> a chess clock in python. ...
> ... it crashes shortly after. 

Can't help you on why it crashes, but

> 
> class eventMonitor (Thread):
>     def run ( self ):
>         [snipped]
>                     if event.keycode == 32:
>                         if turn == 1: turn = 0
>                         if turn == 0: turn = 1
>

looks wrong to me. This is supposed to switch between the 
players (0 and 1), but the first if changes turn to 0, the
second changes it immediately back to 1.

I'd do:
  if turn == 1:  turn = 0
  else:          turn = 1

HTH
Martin




From Thomas.Ploch at gmx.net  Thu Nov 16 03:55:33 2006
From: Thomas.Ploch at gmx.net (Thomas P.)
Date: 16 Nov 2006 00:55:33 -0800
Subject: Tkinter Problems on MAC OS 10.3.9 & python2.5
Message-ID: <1163667332.920077.109950@k70g2000cwa.googlegroups.com>

Hello folks,

my name is Thomas, and I am new to this newsgroup. So first I want to
say hello. :-)

...done!

Now, I have a problem concerning my new python2.5 install. With
python2.3 and 2.4, Tkinter was no problem.

Now, when I try to import it, the folowing happens:

iPimpG4:~/Python-Dev/examples profipimp$ python
Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",
line 38, in <module>
    import _tkinter # If this fails your Python may not be configured
for Tk
ImportError: dlcompat: dyld:
/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
can't open library: /Library/Frameworks/Tk.framework/Versions/8.4/Tk
(No such file or directory, errno = 2)



From leonhard.vogt at gmx.ch  Sun Nov 19 17:38:18 2006
From: leonhard.vogt at gmx.ch (Leonhard Vogt)
Date: Sun, 19 Nov 2006 23:38:18 +0100
Subject: String Replace only if whole word?
In-Reply-To: <mailman.350.1163781593.32031.python-list@python.org>
References: <mailman.350.1163781593.32031.python-list@python.org>
Message-ID: <4560dcd7$1_4@news.bluewin.ch>

Michael Yanowitz schrieb:
>   Yeah, I am operating this on a Python script. However, I am working off
> a requirement that the script be pre-processed and the strings replaced
> before executing the script and that if there are any remaining (not
> replaced)
> names that I don't execute the script and report that some 'mnemonics' have
> not been replaced.

If you control the source(template), you could use string formatting.
http://docs.python.org/lib/typesseq-strings.html

You would have to rewrite your MNEMONIC as %(MNEMONIC)s .

An exception will be raised if you miss a replacement and you are sure
you do not replace anything by accident.

Leonhard


From zhangry at feng.co.jp  Tue Nov 28 02:32:36 2006
From: zhangry at feng.co.jp (HYRY)
Date: 27 Nov 2006 23:32:36 -0800
Subject: How to increase the speed of this program?
Message-ID: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>

I want to join two mono wave file to a stereo wave file by only using
the default python module.
Here is my program, but it is much slower than the C version, so how
can I increase the speed?
I think the problem is at line #1, #2, #3.

import wave
import array
lfile = wave.open(lfilename)
rfile = wave.open(rfilename)
ofile = wave.open(ofilename, "w")
lformat = lfile.getparams()
rformat = rfile.getparams()
lframes = lfile.readframes(lformat[3])
rframes = rfile.readframes(rformat[3])
lfile.close()
rfile.close()
larray = array.array("h", lframes)
rarray = array.array("h", rframes)
oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
oarray[0::2] = larray                                    #2
oarray[1::2] = rarray                                    #3
ofile.setnchannels(2)
ofile.setsampwidth(2)
ofile.setframerate(lformat[2])
ofile.setnframes(len(larray))
ofile.writeframes(oarray.tostring())
ofile.close()



From beemer328i2004 at yahoo.ca  Wed Nov 29 11:32:36 2006
From: beemer328i2004 at yahoo.ca (beemer328i2004)
Date: Wed, 29 Nov 2006 16:32:36 -0000
Subject: Using Python
Message-ID: <ekkcn4+ngk5@eGroups.com>

Hi Guys,

I am new to this language and i need some help...

I am trying to create a script that will go into a log file and bring 
me back the xml from an order...

For example:

go into Log1.xml and extract order number 2 from top to bottom and 
extract it into a txt file...

Does anyone know how i can create this type of script or has like a 
sample that i can use.. I am having a hard time starting the script..

hope someone can help

Thanks agian



From fuzzyman at gmail.com  Sat Nov 25 09:22:26 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Nov 2006 06:22:26 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.709.1164443726.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
	<mailman.709.1164443726.32031.python-list@python.org>
Message-ID: <1164464546.873315.101730@45g2000cws.googlegroups.com>


Fredrik Lundh wrote:
> Tennessee Leeuwenburg wrote:
>
> > If anyone has any good ideas for how to cope as a publisher with these
> > difficulties, I'm all ears.
>
> has any of the format zealots posting to this thread actually
> volunteered to produce any material for your publication?  if not, I
> suggest ignoring them.  any bozo with a keyboard can contribute stop
> energy to a project, but at the end, it's always the people *doing*
> things that matters.
>

+1

You guys are doing a great job and the CC license is fine for free
works like the Python Journal

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

> </F>



From podi.ex at gmail.com  Thu Nov  9 21:38:06 2006
From: podi.ex at gmail.com (Podi)
Date: 9 Nov 2006 18:38:06 -0800
Subject: Excel file read/write?
In-Reply-To: <1163123763.386857.255540@m7g2000cwm.googlegroups.com>
References: <1163119339.334965.264850@i42g2000cwa.googlegroups.com>
	<1163123763.386857.255540@m7g2000cwm.googlegroups.com>
Message-ID: <1163126286.504278.291010@i42g2000cwa.googlegroups.com>

Thanks for the reply.

>
> Most folk would seem to be using pyExcelerator rather than pyXLWriter.
> It is much more up to date, it just hasn't been worked on for a year,

I will give it a shot.

> 1. Python COM interface (part of
> http://sourceforge.net/projects/pywin32/) with lots of users (and hence
> readily available help in this newsgroup), examples, etc -- but
> requires (a) Windows OS (b) Microsoft Excel

I am not into COM as it is kind of anti-intuitive, at least to me.

>
> 2. OpenOffice.org has a built-in Python -- 2.n where n is a small
> number :-( and almost impenetrable documentation -- Sybren Stuvel has
> published some examples: http://www.stuvel.eu/ooo-python
> but my guess is that all the users of the OOo interface could fit in a
> taxi.

Hmmm..., I have 2.4.2 and would not like to down grade myself.

>
> 3. Gnumeric is rumoured to have a similar scripting facility.

Well, I would like to stick with the MS crowd, at least for the moment.

Cheers!
P



From johnjsal at NOSPAMgmail.com  Thu Nov  9 10:32:57 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 09 Nov 2006 10:32:57 -0500
Subject: is this the right way to do subclasses?
In-Reply-To: <mailman.1939.1163025303.11739.python-list@python.org>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>	<eitajt$bsk$03$1@news.t-online.com>	<45523133$0$14421$c3e8da3@news.astraweb.com>	<eith0g$t7e$02$1@news.t-online.com>	<45524d03$0$32427$c3e8da3@news.astraweb.com>	<45524da8$0$32427$c3e8da3@news.astraweb.com>
	<mailman.1939.1163025303.11739.python-list@python.org>
Message-ID: <45534953$0$12978$c3e8da3@news.astraweb.com>

Steve Holden wrote:

>> Wait, I just might be an idiot. Is it not even necessary for me to 
>> call Character's __init__ method? Fighter will inherit it 
>> automatically and call it when a Fighter object is created, right?
>>
> By Jove, he's got it!

But I was thinking...even though there are better ways to do it than 
what I did, I wasn't too far off the mark since I really *was* 
overriding the __init__ and doing some extra initializing of my own in 
each subclass. It was just a terribly ugly way to do it. :)


From webraviteja at gmail.com  Mon Nov 27 15:36:31 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 27 Nov 2006 12:36:31 -0800
Subject: How good is CORBA?
In-Reply-To: <mailman.549.1164136844.32031.python-list@python.org>
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
	<20061121190127.83586.qmail@web88305.mail.re4.yahoo.com>
	<mailman.549.1164136844.32031.python-list@python.org>
Message-ID: <1164659790.934572.282290@h54g2000cwb.googlegroups.com>

On Nov 21, 11:20 am, "Sai Krishna M" <saikris... at gmail.com> wrote:
> there are certainly client/server interactions.

But are they cross-language interactions?

This is how I would choose to distribute code.
Same machine, all in Python - organize in modules in Python path.
Different machines, all in Python - Pyro
Different machines, different languages, stateless calls, simple use -
XMLRPC/ReST
Different machines, different languages, stateless calls, more complex
requirements - SOAP
Different machines, different languages, statelful, typed - CORBA
(omniORB is the best bet at Python end)

ICE
A lot of the CORBA folks have been mad with ICE because it is subtly
discrediting CORBA while not being a standard. It is cleaner, comes
with good documentation, supports more languages than any single ORB
(however you are stuck with only those languages that ZeroC implements
support for). For simple apps, I would stick with omniORBPy. It is not
any more complicated than ICE. While ICE is simpler on the whole, you
will likely use only a fraction of the CORBA/ICE feature set. So the
difference won't necessarily show.

I like my tools to be simple. Lately, I have been happily using JSON
over HTTP.



From fredrik at pythonware.com  Mon Nov 20 05:12:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 11:12:24 +0100
Subject: fileinput.input('test.txt') => ERROR: input() already active
In-Reply-To: <1164016727.678036.225640@e3g2000cwe.googlegroups.com>
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>	<ejrqnb$5o3$02$1@news.t-online.com>
	<1164016727.678036.225640@e3g2000cwe.googlegroups.com>
Message-ID: <ejrv2a$lfr$1@sea.gmane.org>

cyberco wrote:

> Another related question I have: The following piece edits in place,
> but ads whitelines between all lines of a Windows text file. Why?
> 
> ===========================
> fi = fileinput.input('test.txt', inplace=1)
> for l in fi:
>     print l.replace('a', 'b')
> ===========================

     http://docs.python.org/lib/module-fileinput.html

     /.../ lines are returned including the trailing newline when it
     is present.

and "print" adds its own newline, of course.  try

     print text,

or

     sys.stdout.write(text)

</F>



From pavlovevidence at gmail.com  Tue Nov 21 08:42:58 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Nov 2006 05:42:58 -0800
Subject: Reference class in class creation
In-Reply-To: <a1c52$4562f68e$547078de$28920@news.chello.at>
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
	<a1c52$4562f68e$547078de$28920@news.chello.at>
Message-ID: <1164116577.982892.136790@f16g2000cwb.googlegroups.com>


Gregor Horvath wrote:
> Diez B. Roggisch schrieb:
>
> > Anything wrong with:
> >
> > class Foo(object):
> >    pass
> >
> > Foo.a = Foo
> >
> > ?
>
> Thanks.
> The problem with this is that there is also metaclass hacking involved
> which relies on "a" 's creation in the class body. In your suggestion
> "a" is not present when __new__ of the metaclass is called.

The metaclass's __new__ returns the class object.  This is the first
time the object is available; it's impossible to access before that,
but you can get at it before __new__ exits.  Most metaclass __new__
functions look like this:

def __new__(metatype,name,bases,clsdict):
    # do some weird stuff here
    return type.__new__(metatype,name,bases,clsdict)

You could change it to look like this instead:

def __new__(metatype,name,bases,clsdict):
    # do some weird stuff here
    cls = type.__new__(metatype,name,bases,clsdict)
    cls.a = SomeContainer(cls)
    return cls

Or, if you can't change the metaclass, you can subclass it and override
__new__ to get at cls before __new__ exits:

def __new__(metatype,name,bases,dict):
    cls = GivenMetaclass.__new__(metatype,name,bases,dict)
    cls.a = SomeContainer(cls)
    return cls

If the "metaclass hacking" you describe is setting __metaclass__ to a
function (i.e., not metaclass hacking), then same thing applies, just
modify or wrap the function to get at the class object and do what you
need to do.


Carl Banks



From shejo284 at gmail.com  Tue Nov  7 15:10:26 2006
From: shejo284 at gmail.com (Sheldon)
Date: 7 Nov 2006 12:10:26 -0800
Subject: C wrapper
In-Reply-To: <dG54h.6600$736.3574@newsfe16.phx>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
Message-ID: <1162930226.658619.79830@m73g2000cwd.googlegroups.com>


Farshid Lashkari skrev:

> Sheldon wrote:
> > Can anyone give me some idea as to what this error means?
> >
> > "ImportError: dynamic module does not define init function "
> >
> > I am new at this and there is still a lot to learn.
> >
> > Any help is appreciated,
>
> Take a look at the documentation for creating extension modules,
> especially the following page:
>
> http://docs.python.org/ext/methodTable.html
>
> "The initialization function must be named initname(), where name is the
> name of the module, and should be the only non-static item defined in
> the module file"
>
> -Farshid

This function is there and is called init_mymodule() but I have other
functions that are not static.
Could this be the cause?

/Sheldon



From bugracakir at gmail.com  Wed Nov  8 09:50:03 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Wed, 8 Nov 2006 16:50:03 +0200
Subject: Help solving Python 2.5 crash: The instruction "0x7c168f1d"
	referenced memory at "0x00000001c
Message-ID: <5a00f6240611080650i78ee03eawf716e358ca221bab@mail.gmail.com>

Hi,

I have came across this like problem in my simulations also. But the case is
not for the program structure or
python version, the case is hardware :) . If you have time to try it on some
other machine than the current and
if the problem arises then there is something different!
-------------- next part --------------
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From liam_herron at hotmail.com  Tue Nov 21 16:19:04 2006
From: liam_herron at hotmail.com (liam_herron)
Date: 21 Nov 2006 13:19:04 -0800
Subject: Is there a list comprehension for this?
Message-ID: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>


Given:
dw = [ 1, -1.1, +1.2 ]

Suppose I want to create a list 'w' that is defined as

w[0] = dw[0],
w[1] = w[0] + dw[1],
w[2] = w[1] + dw[2]

Is there a list comprehension or map expression to do it in one or 2
lines.



From __peter__ at web.de  Sun Nov  5 08:00:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 05 Nov 2006 14:00:51 +0100
Subject: string to list of numbers conversion
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <eikn9p$bbq$01$1@news.t-online.com>

jm.suresh at no.spam.gmail.com wrote:

>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>   Is there any alternative way?

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/364469

Peter


From robert.kern at gmail.com  Wed Nov  1 19:18:31 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 01 Nov 2006 16:18:31 -0800
Subject: Computing FFT with Python NumPy 1.0
In-Reply-To: <1162425898.984234.151740@i42g2000cwa.googlegroups.com>
References: <1162425898.984234.151740@i42g2000cwa.googlegroups.com>
Message-ID: <eibdgo$k3o$1@sea.gmane.org>

mcdurr at gmail.com wrote:
> I recently installed Python 2.5 on Windows and also installed numpy
> 1.0. 

You will want to ask numpy questions on the numpy mailing list.

   http://www.scipy.org/Mailing_Lists

> I'd like to compute an FFT on an array of numbers but I can't
> seem to access the FFT function.  I'm fairly new to Python (obviously)
> and I can't seem to find documentation to match my distribution of
> numpy and I can't figure out how to access the FFT function.
> 
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "copyright", "credits" or "license()" for more information.
> 
> IDLE 1.2
>>>> from numpy import *
>>>> a=array((1,2,3,2,1,2,3,2,1))
>>>> fft(a)
> 
> Traceback (most recent call last):
>   File "<pyshell#2>", line 1, in <module>
>     fft(a)
> TypeError: 'module' object is not callable

All of the fft functions are in the numpy.fft module.

 >>> from numpy import *
 >>> a=array((1,2,3,2,1,2,3,2,1))
 >>> fft.fft(a)
array([  1.70000000e+01+0.j        ,  -1.15270364e+00-0.41954982j,
         -3.37938524e+00-2.83564091j,   5.00000000e-01+0.8660254j ,
          3.20888862e-02+0.18198512j,   3.20888862e-02-0.18198512j,
          5.00000000e-01-0.8660254j ,  -3.37938524e+00+2.83564091j,
         -1.15270364e+00+0.41954982j])

-- 
Robert Kern

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



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 17 16:30:58 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 18 Nov 2006 08:30:58 +1100
Subject: remove a list from a list
References: <ejkv1u$ajf$1@sea.gmane.org> <455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org> <455E0A20.9000509@tim.thechases.com>
	<ejl2re$ns3$1@sea.gmane.org> <455E100D.8030100@tim.thechases.com>
	<mailman.374.1163793666.32031.python-list@python.org>
Message-ID: <pan.2006.11.17.21.30.58.132036@REMOVE.THIS.cybersource.com.au>

On Fri, 17 Nov 2006 12:00:46 -0800, Rares Vernica wrote:

> Problem context:
> 
> import os
> dirs_exclude = set(('a', 'b', 'e'))
> for root, dirs, files in os.walk('python/Lib/email'):
>      # Task:
>      # delete from "dirs" the directory names from "dirs_exclude"
>      # case-insensitive
> 
> The solution so far is:
> 
> for i in xrange(len(dirs), 0, -1):
>    if dirs[i-1].lower() in dirs_exclude:
>      del dirs[i-1]
> 
> I am looking for a nicer solution.

Define "nicer".

First thing I'd do is change the loop:

for i in xrange(len(dirs)-1, -1, -1):
    if dirs[i].lower() in dirs_exclude:
        del dirs[i]

Second thing I'd do is encapsulate it in a function instead of calling it
in place:

def remove_in_place(source, target):
    for i in xrange(len(source)-1, -1, -1):
        if source[i].lower() in target:
            del source[i]

Third thing I'd do is replace the delete-in-place code away, and build a
new list using the set idiom, finally using list slicing to change the
source in place:

def remove_in_place2(source, target):
    target = set(s.lower() for s in target)
    source[:] = [x for x in source if x.lower() not in target]
    # note the assignment to a slice

And finally, I would test the two versions remove_in_place and
remove_in_place2 to see which is faster.


import timeit

setup = """from __main__ import remove_in_place
target = list("aEIOu")
source = list("AbcdEfghIjklmnOpqrstUvwxyz")
"""

tester = """tmplist = source[:] # make a copy of the list!
remove_in_place(tmplist, target)
"""

timeit.Timer(tester, setup).timer()

You have to make a copy of the list on every iteration because you are
changing it in place; otherwise you change the values you are testing
against, and the second iteration onwards doesn't have to remove anything.


(All code above untested. Use at own risk.)

-- 
Steven.



From no-spam at no-spam-no-spam.invalid  Fri Nov 24 04:37:51 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 10:37:51 +0100
Subject: Local variables persist in functions?
In-Reply-To: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <ek6ehh$pm9$1@news.albasani.net>

120psi at gmail.com wrote:
> I'm a bit baffled.  Here is a bit of fairly straightforward code:
> 
> def _chunkify( l, chunkSize, _curList = list() ):
>     print _curList   # yay for printf debugging
>     if len( l ) <= chunkSize:
>         _curList.append( l )
>     else:
>         newChunk = l[:chunkSize]
>         _curList.append( newChunk )
>         _chunkify( l[chunkSize:], chunkSize, _curList )
>     return _curList
> 
> _chunkify simply breaks a sequence into a sequence of smaller lists of
> size <= chunkSize.  The first call works fine, but if I call it
> multiple times, weirdness happens.
> 
> chunks = _chunkify( list, size )   # _curList keeps its previous value!
> chunks = _chunkify( list, size, list() )    # this works as expected
> 
> Considering the default value of _curList, these statements should be
> identical.  Any pointers?  Did I miss something in the python reference
> manual?  (running 2.4.3, fyi)
> 

the default list() is only created once when the function is defined. And its later its always the same list
Use

def _chunkify( l, chunkSize, _curList=None ):
    _curList = _curList or []
    ...

then it works.

Robert


From kibleur.christophe at gmail.com  Thu Nov  9 16:12:17 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 9 Nov 2006 13:12:17 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1163088412.025310.185250@m7g2000cwm.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
	<1162831146.195927.296110@e3g2000cwe.googlegroups.com>
	<1163086763.536524.37710@h48g2000cwc.googlegroups.com>
	<1163088412.025310.185250@m7g2000cwm.googlegroups.com>
Message-ID: <1163106737.776663.18800@h54g2000cwb.googlegroups.com>

Thanks David,
your sample works nicely !



From e0427417 at student.tuwien.ac.at  Mon Nov 20 03:47:32 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 09:47:32 +0100
Subject: a few extensions for the itertools
In-Reply-To: <mailman.478.1163992943.32031.python-list@python.org>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
Message-ID: <45616b46$0$12642$3b214f66@tunews.univie.ac.at>

Gabriel Genellina wrote:
 > At Sunday 19/11/2006 17:35, Mathias Panzenboeck wrote:
 >
 >> I wrote a few functions which IMHO are missing in python(s itertools).
 >>
 >> You can download them here:
 >> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
 >>
 >>
 >> isum(iterable, start=0) -> value
 >>         Returns the sum of the elements of a iterable
 >>         plus the value of parameter 'start'.  When the
 >>         iterable is empty, returns start.
 >
 > Isn't the same as the builtin sum?
 >

No, because the builtin sum want's a list. This can also handle any kind of iterable, so this would 
work:

isum(i**2 for i in xrange(100))

sum would need firs the whole list to be generated:

sum([i**2 for i in xrange(100)])

 >> iproduct(iterable, start=0) -> value
 >
 > As others said, start should be 1
 >

Indeed. Can't believe I made that mistake... the mistake is only in the documentation. :)

 >> fcain(funct,*functs) -> function(...,***)
 >>         fcain(f1,f2,...,fn)(*args,*kwargs) equals
 >> f1(f2(...fn(*args,*kwargs)))
 >
 > I don't understand it, nor even the signature. Perhaps it tries to be
 > "fchain", function composition? But what has it to do with iterables?
 >

Ups, missed out the 'h'. (Also only in the documentation.)

It's like the . operator in haskell:

fchain(f,g,h) is the same like lambda *args,**kwargs: f(g(h(*args,**kwargs)))


From dlenski at gmail.com  Sat Nov 11 20:30:18 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 11 Nov 2006 17:30:18 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.2083.1163227355.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<ej2nrk$qea$2@sea.gmane.org>
	<mailman.2083.1163227355.11739.python-list@python.org>
Message-ID: <1163295018.712907.20310@m73g2000cwd.googlegroups.com>

Hendrik van Rooyen wrote:
> "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>
> 8<---------------------------------------------------
> >  >>> color = "blue"
> >  >>> if color == "red" or "green" or "yellow":
> > ...     print color, "is red or green or yellow"
> > ...
> > blue is red or green or yellow
>
> *grin* - this can be construed as a weakness in Python -
>
> Even COBOL compilers in the sixties would "add in" the implied
> "if color = " after each 'or', instead of bloody - mindedly thinking:

How the heck could this be considered a weakness in Python?  I *like*
the fact that Python does not do anything "automagical" and rewrite
expressions, thinking it's smarter than the programmer.  That's one
reason I got sick of Perl.

There are plenty of cases where I might want to use an expression like
"color == red or foo or bar" with the semantics it actually implies in
Python.  Making an exception for literal strings specifically seems
reallly dubious given the fact that Python already has an easy way to
do what you want with the "color in (red, green, blue)" construct.
This supposedly lacking feature would only be desired by people who
have been brain-damaged by programming languages like BASIC and
COBOL... or newbies who haven't programmed enough to really "get"
Boolean logic.  </rant>

Dan



From gbrunick at andrew.cmu.edu  Mon Nov 27 17:40:55 2006
From: gbrunick at andrew.cmu.edu (Gerard Brunick)
Date: Mon, 27 Nov 2006 17:40:55 -0500
Subject: Can you fix up wrapper function argument signatures?
Message-ID: <456B6977.70300@andrew.cmu.edu>

Consider:

 >>> def negate(func):
...     def wrapper(*args, **kwargs):
...         return not func(*args, **kwargs)
...     return wrapper
...
 >>> def f(x):
...     return x > 10
...
 >>> g = negate(f)
 >>> g(20)
False
 >>> g(5)
True

Now g has the argument signature of (*args, **kwargs).  Pop-up help in 
Python
Scripter(which is great by the way) tells me this, as does

 >>> g.func_code.co_varnames
('args', 'kwargs')

Is there anyway to fix this in negate?  I assume that I can't just start
changing things in g.func_code since the bytecodes depend on the order
of variables and lots of other stuff that I don't claim to understand.

Please note: From the new functools module, I see that one can set/update
__module__, __name__, __doc__, and __dict__ using the corresponding 
attributes
from the wrapped function; however, none these fix up the argument signature
do they?  (I'm still running 2.4, so I haven't tried it.)

Thanks,
Gerard



From inq1ltd at verizon.net  Mon Nov 27 12:29:58 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 27 Nov 2006 12:29:58 -0500
Subject: Several entries on Tile and TableList at the Tkinter wiki
In-Reply-To: <942ad$4569fe23$4275d90a$25231@FUSE.NET>
References: <942ad$4569fe23$4275d90a$25231@FUSE.NET>
Message-ID: <200611271229.58244.inq1ltd@verizon.net>

Thanks for posting this entry,

The fact that a wiki or help site doesn't get a 
lot of traffic is not an necessarily an indicator 
of it's usfulness.  It indicates to me that the 
product, in this case Tkinter, may be easy to use 
and understand, after working with it a little, A 
lot of help may not be necessary.

A good example is the py2exe help site.
At one time not to long ago there might be 8 to 12 
post per day, or more. Today by my unscientific 
count method, I don't think there are more than 3 
to 4 post per week.  Yet, py2exe and Tkinter is 
almost as valuable as Python. If we couldn't 
build programs for Windows, where would a python 
programmes's money come from?

Thanks again,

jim-on-linux
http://www.inqvista.com



On Sunday 26 November 2006 15:50, Kevin Walzer 
wrote:
> I'm not sure how often members of this list
> visit the Tkinter wiki at
> http://tkinter.unpythonic.net/wiki/FrontPage; 
> this wiki seems to have less traffic in general
> than the Tcl/Tk wiki at http://wiki.tcl.tk.
> Given that, I hope it's not out of line for me
> to call attention to several pages that I've
> posted about integrating Tile
> (http://tktable.sourceforge.net/tile) and
> TableList (http://www.nemethi.de,
> http://wiki.tcl.tk/5527) into Tkinter
> applications. I've noted a serious lack of
> resources/documentation about these two
> powerful Tk components. In addition to some
> documentation, screenshots, and sample
> applications, I've posted updated versions of
> the original TableList and Tile wrappers by
> Martin Franklin.
>
> I should take this moment to thank Mr. Franklin
> for his work on these wrappers; whatever I
> added to them was pretty minimal compared to
> the heavy lifting he did. He originally posted
> them on the Internet last year, but the site
> that hosted them has gone dark. Anyway, Mr.
> Franklin, if you are reading this, thank you
> for your hard work; it has been enormously
> helpful. I hope my own efforts extend your work
> and make it even more useful for other Tkinter
> developers.
>
> Here are the links:
>
> http://tkinter.unpythonic.net/wiki/UsingTile
> http://tkinter.unpythonic.net/wiki/TileWrapper
> http://tkinter.unpythonic.net/wiki/TableListWra
>pper
> http://tkinter.unpythonic.net/wiki/TableListTil
>eWrapper
> http://tkinter.unpythonic.net/wiki/PyLocateTile
> http://tkinter.unpythonic.net/wiki/PyLocate
>
> Hope these prove useful to others, as starting
> points for your own work if nothing else.
> Corrections and improvements are of course
> invited; it's a wiki!
>
>
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com


From jacob.rael at gmail.com  Tue Nov 28 12:59:41 2006
From: jacob.rael at gmail.com (Jacob Rael)
Date: 28 Nov 2006 09:59:41 -0800
Subject: Simple text parsing gets difficult when line continues to next line
Message-ID: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>

Hello,

I have a simple script to parse a text file (a visual basic program)
and convert key parts to tcl. Since I am only working on specific
sections and I need it quick, I decided not to learn/try a full blown
parsing module. My simple script works well until it runs into
functions that straddle multiple lines. For example:

  Call mass_write(&H0, &HF, &H4, &H0, &H5, &H0, &H6, &H0, &H7, &H0,
&H8, &H0, _
                &H9, &H0, &HA, &H0, &HB, &H0, &HC, &H0, &HD, &H0, &HE,
&H0, &HF, &H0, -1)


I read in each line with:

for line in open(fileName).readlines():

I would line to identify if a line continues (if line.endswith('_'))
and concate with the next line:

line = line + nextLine

How can I get the next line when I am in a for loop using readlines?

jr



From deets at nospam.web.de  Thu Nov 16 05:34:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Nov 2006 11:34:37 +0100
Subject: split CSV fields
References: <ejhduq$l5l$1@news.albasani.net>
Message-ID: <4s2t5tFtgldbU1@mid.uni-berlin.de>

robert wrote:

> What is a most simple expression for splitting a CSV line with "-protected
> fields?
> 
> s='"123","a,b,\"c\"",5.640'

Use the csv-module. It should have a dialect for this, albeit I'm not 100%
sure if the escaping of the " is done properly from csv POV. Might be that
it requires excel-standard.

Diez


From horpner at yahoo.com  Fri Nov 10 11:50:16 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 17:50:16 +0100
Subject: Py3K idea: why not drop the colon?
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
	<17748.35935.368749.950252@montanaro.dyndns.org>
	<mailman.2040.1163174491.11739.python-list@python.org>
Message-ID: <slrnel9bg3.1dk.horpner@FIAD06.norwich.edu>

On 2006-11-10, Robert Kern <robert.kern at gmail.com> wrote:
> skip at pobox.com wrote:
>> P.S.  I felt I just had to tie this into the thread on
>> profanity somehow. But notice that I didn't mention nazis or
>> Hitler. ;-)
>
> You did it just now!

I hate Godwin's Law Nazis.

;-)

-- 
Neil Cerutti
Scouts are saving aluminum cans, bottles, and other items to be
recycled. Proceeds will be used to cripple children. --Church Bulletin
Blooper


From robert.kern at gmail.com  Sat Nov 11 07:31:17 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 11 Nov 2006 06:31:17 -0600
Subject: numpy/scipy: correlation
In-Reply-To: <ej4eio$1fi$1@sea.gmane.org>
References: <ej4akj$vbe$1@news.albasani.net> <ej4eio$1fi$1@sea.gmane.org>
Message-ID: <ej4fr0$4r4$1@sea.gmane.org>

Robert Kern wrote:
> robert wrote:
>> Is there a ready made function in numpy/scipy to compute the correlation y=mx+o of an X and Y fast: 
>> m, m-err, o, o-err, r-coef,r-coef-err ?

> scipy.optimize.leastsq() can be told to return the covariance matrix of the
> estimated parameters (m and o in your example; I have no idea what you think
> r-coeff is).

Ah, the correlation coefficient itself. Since correlation coefficients are weird
beasts constrained to [-1, 1], standard gaussian errors like you are expecting
for m-err and o-err don't apply. No, there's currently no function in numpy or
scipy that will do something sophisticated enough to be reliable. Here's an option:

  http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=155684

-- 
Robert Kern

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



From tenax.raccoon at gmail.com  Mon Nov 13 12:47:18 2006
From: tenax.raccoon at gmail.com (Jason)
Date: 13 Nov 2006 09:47:18 -0800
Subject: Singleton Class Exception
References: <1163437486.036537.270190@h54g2000cwb.googlegroups.com>
Message-ID: <1163440038.901759.112130@h54g2000cwb.googlegroups.com>

dischdennis wrote:
> Hello List,
>
> I would like to make a singleton class in python 2.4.3, I found this
> pattern in the web:
>
> class Singleton:
>     __single = None
>     def __init__( self ):
>         if Singleton.__single:
>             raise Singleton.__single
>         Singleton.__single = self
>
>
> the line "raise Singleton.__single" invokes in my class the following
> error:
>
> exceptions must be classes, instances, or strings (deprecated), not
> PurchaseRequisitionController
>
>
>
> Greetings, Dennis

The problem is that you yoinked a bad example of a singleton.  The
error is correct, only exceptions derived from the Exception class and
strings are supported.  (Strings are supported for historical usage,
and a deprecated.)

Why exactly do you need a singleton?  Do you want only one instance of
a class?  Often, you really want something that shares state: all are
one.  This pattern is known as a borg.  Please see
"http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531" to see
how the Borg Pattern works.

If you absolutely gotta have a singleton, there are other ways of
implementing it.  I can think of only one reason: You want the
singleton's destructor to be called only if there are no remaining
instances in existance.  (For the Borg pattern, the deconstructor can
be called once per instance created.)

The problem with this reason is that Python doesn't guarantee when the
destructors will be called for instances (and some instances will never
have their destructors called).  Although C-Python implements usually
destroys an instance when its ref-count drops to 0, IronPython and
Jython may do things very differently.  (I have no experience with
either of those, so I cannot tell you how they differ.)

Still, if you're dead set on a Singleton class, I'll post one in a
little bit.

    --Jason



From fredrik at pythonware.com  Thu Nov 16 03:00:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 09:00:45 +0100
Subject: Yield
In-Reply-To: <455c15ca$1@news.eftel.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>	<455b4f9f$1@usenet01.boi.hp.com>	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
Message-ID: <ejh5rd$ojc$1@sea.gmane.org>

John Machin wrote:

>> I would like to thanks Fredrik for his contribution to improve that.
> 
> Call me crazy, but after an admittedly quick read, the version on the 
> wiki seems to be about word for word with on the docs.python.org version.

maybe he was thinking about the article I posted, or the FAQ link I 
posted in a followup:

     http://effbot.org/pyfaq/what-is-a-generator.htm

which was based on my article and the glossary entry from the tutorial:

     http://effbot.org/pytut/glossary.htm#generator

> Could you please tell us how you think the wiki version is an improvement?

an "add comment" link?  direct URL:s for all concepts in the language? 
extensive hyperlinking?  semantic retargetable markup?

</F>



From noah.rawlins at comcast.net  Tue Nov 21 19:27:02 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Tue, 21 Nov 2006 19:27:02 -0500
Subject: interleaving dictionary values
In-Reply-To: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
References: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
Message-ID: <y-Odnc7hp8zFBP7YnZ2dnUVZ_uGdnZ2d@comcast.com>

j1o1h1n at gmail.com wrote:

> filter(None, - my brain parses that automatically now.  This is not so
> bad.  Flatten is snitched from ASPN/Cookbook/Python/Recipe/363051,
> thank you Jordan Callicoat, Mike C. Fletcher:
> 
> def flatten(l, ltypes=(list, tuple)):
>     i = 0
>     while (i < len(l)):
>        while (isinstance(l[i], ltypes)):
>            l[i:i+1] = list(l[i])
>        i += 1
>     return l
> 

On a side note, that version of flatten doesn't handle an empty list as 
the last element of a list...

 >>> flatten([1, 2, 3, []])
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "<stdin>", line 4, in flatten
IndexError: list index out of range

You need a try: in there or something...

def flatten(l, ltypes=(list, tuple)):
     i = 0
     while(i < len(l)):
         try:
             while(isinstance(l[i], ltypes)):
                 l[i:i+1] = list(l[i])
             i += 1
         except IndexError:
            pass
     return l

noah


From johnjsal at gmail.com  Thu Nov  2 11:12:56 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 08:12:56 -0800
Subject: creating new objects with references to them
In-Reply-To: <1162482760.424782.244760@h48g2000cwc.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
	<1162482760.424782.244760@h48g2000cwc.googlegroups.com>
Message-ID: <1162483976.152660.121200@f16g2000cwb.googlegroups.com>

Ant wrote:

> It all depends on what UI you are using (Web frontend? GUI such as
> Tkinter?) and what your use case is.

Making it myself with wxPython.

>
> What is it exactly that you want to do? Create a bunch of Researcher
> objects and then save them in a single hit? Create a list of
> Researchers and then choose which to save to the db? Populate a list of
> researchers from the db, and have the option of editing or adding new
> ones? Should the new Researcher objects be committed to the db as soon
> as they are saved?

There are two options: save current record and save all records, both
of which put the info in the DB immediately.


> Anyway, a simple list of Researchers should suffice for any of these
> purposes, and assuming you want to commit them all in one hit, you have
> a list of objects ready to iterate over.

Ok, so in making a list does this mean that I won't have a name for
each instance? I just have to iterate over the list when I need them?
I'm not sure how I would do this if the user chooses just to save a
single record and not all of them.



From breakfastea at gmail.com  Sat Nov 11 03:03:07 2006
From: breakfastea at gmail.com (Camellia)
Date: 11 Nov 2006 00:03:07 -0800
Subject: UnboundLocalError
In-Reply-To: <mailman.2085.1163229531.11739.python-list@python.org>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
	<1163223355.190176.127030@h48g2000cwc.googlegroups.com>
	<mailman.2085.1163229531.11739.python-list@python.org>
Message-ID: <1163232187.747318.132260@m73g2000cwd.googlegroups.com>

Oh how can I thank you enough, you make my day:)
According to what you said I finally figure it out, it is the same as:

<code>
b = 1
def a():
    b = b #no good:)
</code>

So in every day programming I should avoid using the same name for
different types of objects because they will step on each other, right?

On Nov 11, 6:18 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:

On Nov 11, 6:18 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:
> At Saturday 11/11/2006 02:35, Camellia wrote:
>
> >But sorry I'm so dumb I can't say I really understand,
> >what do I actually do when I define a function with its name "number"?Don't apologize, Python is a lot more dumb than you. It obeys very
> simple rules (a good thing, so we can clearly understand them, once
> we know them).
> Recalling your previous example:
>
> > > >> def main():
> > > >>    number = number()Python first scans the source code looking for assigned-to names.
> That is, names to the left of equal signs. Those names, plus the
> function formal parameters, make the list of "local names". Any other
> names referenced are assumed to be globals, that is, living outside
> your function. (That's not entirely true but enough for now).
> Notice that "number" is a local name because it's assigned to; it
> doesn't matter whether a global name "number" exists or not.
> When the code is executed, the "number" to the right references the
> local name, which has not been assigned to yet - that's why you get
> an UnboundLocalError. "number" can't be a global name when used on
> the right hand side, and a local name when used on the left hand
> side. It's simple: it is local, or not, but not both.
>
> >why does a name of a function has something to do with a variable?Notice also that it does not matter *what* kind of object a name
> refers to: it may be a function, a class, an object instance,
> whatever. Inside a function, by example, a local name "a" may be
> bound at most to a single object at a time, it doesn't matter its
> type. A local name "a" can't refer to an integer and a class at the same time.
> The left hand side of an assign statement *always* uses local names,
> except when you declare a name to be global by using the "global" keyword.
> And notice also that I've never used the word variable.
>
> >Oh wait can I do this in Python?:
> ><code>
> >def a():
> >     def b()
> ></code>
>
> >so the b() will appear to be a local function which is the possible
> >cause of my little own error because the compiler will interpret the
> >number() as a local function but a global one?Yes, you can. Python has "lexically nested scopes". The simple
> local/global rule of above is a bit more complicated: when a name is
> not local, it is searched inside the enclosing functions, then in the
> containing module's global namespace, and last in the builtin names.
> And yes, b is local to a, so it effectively hides any external b that
> could be in outer scopes.
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! -http://correo.yahoo.com.ar



From mauriceling at acm.org  Thu Nov 16 15:27:30 2006
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 16 Nov 2006 20:27:30 GMT
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
Message-ID: <455cc9ae$1@news.unimelb.edu.au>


> 
> I once wrote a partial JVM in Modula-3 (strictly a researchware
> effort), so I can imagine it being done technically.  But why?
> 
> The big problem with Java-and-Python is not the VMs underneath.  It is
> the fact that Java has layers upon layers upon layers of idiosyncratic
> libraries and idioms.  When you write bindings to that world (even if
> the bindings are generated automagically), you have to *think* in
> those same layers.  The Python-oriented developer suddenly has to use
> a dozen imports in order to do things already done better in
> Pythonesque libraries.
> 

The main use I can see is to be able to incorporate Java applications 
into Python. For example, I am using Cytoscape (www.cytoscape.org) which 
is in Java. I do hope that I can control Cytoscape from Python and 
manipulate its objects from Python.

Say given cytoscape.jar, I'll like to be able to do this:

 >>> from cytoscape javaimport cytoscape
 >>> c = cytoscape()

And the tighest way I see that this can be done is for Python VM to 
execute Java bytecodes like Python bytecodes. That is, Python VM 
executes Java bytecodes directly and not through object mapping which I 
think is that JPyPe is doing.

I must say that this is part of even a fluffier dream that one day, I 
can take any applications and play around with it in Python. Currently, 
my collaborators wrote in Perl and Java, so it is not easy for me to use 
their work in my work.

ML


From cfbolz at googlemail.com  Fri Nov 24 03:16:02 2006
From: cfbolz at googlemail.com (cfbolz at googlemail.com)
Date: 24 Nov 2006 00:16:02 -0800
Subject: Abelson and Python
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
	<mailman.625.1164269712.32031.python-list@python.org>
Message-ID: <1164356162.745698.3310@h54g2000cwb.googlegroups.com>


Fredrik Lundh schrieb:

> markscottwright wrote:
>
>  > If it were that easy, the PyPy guys would be done by now.
>
> if the PyPy guys had focused on writing a Python interpreter in Python,
> they'd been done by now.
>
> </F>

The "Python interpreter in Python" part of PyPy _is_ done. Since quite
a while even (something like July 2005) compilation to C works, and the
interpreter was more or less finished since quite a while before that.
There were some things missing at that point but interpretation of
Python code that didn't use any fancy builtin modules worked.

Cheers,

Carl Friedrich Bolz



From john106henry at hotmail.com  Sun Nov 26 03:00:32 2006
From: john106henry at hotmail.com (John Henry)
Date: 26 Nov 2006 00:00:32 -0800
Subject: case insensitive dictionary
In-Reply-To: <Xns98871D10FED3rtwfreenetREMOVEcouk@216.196.109.145>
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
	<Xns98871D10FED3rtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <1164528032.600718.166090@h54g2000cwb.googlegroups.com>

I don't think that's sufficient.  See how many methods the author of
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/283455 had to
redefine.

Rob Williscroft wrote:
> John Henry wrote in news:1164494606.514366.124810
> @l39g2000cwd.googlegroups.com in comp.lang.python:
>
> > I believe the standard dictionary should be amened to allow the use of
> > case insensitive keys - as an option.
>
> class idict( dict ):
>
>   class __istr( str ):
>
>     def __eq__( self, other ):
>       return self.lower() == other.lower()
>
>     def __hash__( self ):
>       return self.lower().__hash__()
>
>   def __setitem__( self, k, v ):
>     dict.__setitem__( self, idict.__istr( k ), v )
>
> d = idict( a = 1, b = 2 )
> d['A'] = 3
> 
> print d
> 
> Rob.
> -- 
> http://www.victim-prime.dsl.pipex.com/



From g.brandl-nospam at gmx.net  Mon Nov 13 03:07:01 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 13 Nov 2006 09:07:01 +0100
Subject: Python 3000 idea -- + on iterables -> itertools.chain
In-Reply-To: <1163385266.824914.265490@b28g2000cwb.googlegroups.com>
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
Message-ID: <ej993b$tt7$1@news.albasani.net>

George Sakkis wrote:
> Fredrik Lundh wrote:
> 
>> John Reese wrote:
>>
>> > It seems like it would be clear and mostly backwards compatible if the
>> > + operator on any iterables created a new iterable that iterated
>> > throught first its left operand and then its right, in the style of
>> > itertools.chain.
>>
>> you do know that "iterable" is an informal interface, right?  to what
>> class would you add this operation?
>>
>> </F>
> 
> The base object class would be one candidate, similarly to the way
> __nonzero__ is defined to use __len__, or __contains__ to use __iter__.

What has a better chance of success in my eyes is an extension to yield
all items from an iterable without using an explicit for loop: instead of

for item in iterable:
     yield item

you could write

yield from iterable

or

yield *iterable

etc.

Georg


From johnjsal at gmail.com  Thu Nov  2 16:27:42 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 13:27:42 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <mailman.1692.1162502583.11739.python-list@python.org>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>
	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>
	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>
	<mailman.1692.1162502583.11739.python-list@python.org>
Message-ID: <1162502862.141973.324040@h48g2000cwc.googlegroups.com>

Carsten Haese wrote:

> The fact that you were able to answer your own question only a few
> minutes later indicates to me that you should set your "I give up and
> ask the list" threshold a tad higher.

That's a perfectly valid comment, but in this case just not applicable.
I spent a lot of time working through my original question before
posting, but I just couldn't get it. It's not like I didn't try
anything at all before posting the follow-up, either. I just happened
to notice one more thing after posting.



From cppasm at gmail.com  Fri Nov 10 03:31:34 2006
From: cppasm at gmail.com (cppasm at gmail.com)
Date: 10 Nov 2006 00:31:34 -0800
Subject: Simple question to split
In-Reply-To: <mailman.2013.1163123956.11739.python-list@python.org>
References: <mailman.2013.1163123956.11739.python-list@python.org>
Message-ID: <1163147494.339841.51410@i42g2000cwa.googlegroups.com>

a.split(',')



From rvernica at gmail.com  Fri Nov 17 14:04:25 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 11:04:25 -0800
Subject: remove a list from a list
In-Reply-To: <455E0046.1090005@tim.thechases.com>
References: <ejkv1u$ajf$1@sea.gmane.org> <455E0046.1090005@tim.thechases.com>
Message-ID: <ejl13i$hqv$1@sea.gmane.org>

That is a nice solution.

But, how about modifying the list in place?

That is, l would become ['c', 'D'].

Thanks a lot,
Ray

Tim Chase wrote:
>> I have a list like
>>    e = ['a', 'b', 'e']
>> and another list like
>>    l = ['A', 'a', 'c', 'D', 'E']
>> I would like to remove from l all the elements that appear in e 
>> case-insensitive. That is, the result would be
>>    r = ['c', 'D']
>>
>> What is a *nice* way of doing it?
> 
> 
> Well, it's usually advantageous (for speed purposes) to make a 
> set out of your lookup data.  One can then use it for a list 
> comprehension something like
> 
>  >>> e = ['a', 'b', 'e']
>  >>> l = ['A', 'a', 'c', 'D', 'E']
>  >>> s = set(e)
>  >>> [x for x in l if x.lower() not in s]
> ['c', 'D']
> 
> This presumes that "e" is all lowercase letters.  Otherwise, you 
> can force it with
> 
> 	s = set(c.lower() for c in e)
> 
> -tkc
> 
> 
> 
> 
> 
> 



From gagsl-py at yahoo.com.ar  Mon Nov  6 18:38:04 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 06 Nov 2006 20:38:04 -0300
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <eiogps$c1d$1@sea.gmane.org>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
	<1162854476.903789.5550@b28g2000cwb.googlegroups.com>
	<eiogps$c1d$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061106203716.049acb88@yahoo.com.ar>

At Monday 6/11/2006 20:34, Robert Kern wrote:

>John Machin wrote:
> > Indeed yourself. Have you ever considered reading posts in
> > chronological order, or reading all posts in a thread?
>
>That presumes that messages arrive in chronological order and 
>transmissions are
>instantaneous. Neither are true.

Sometimes I even got the replies *before* the original post comes.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From erinhouston at gmail.com  Sat Nov 11 22:13:05 2006
From: erinhouston at gmail.com (ina)
Date: 11 Nov 2006 19:13:05 -0800
Subject: odd problem with watsup and VB6 application with modal dialog
In-Reply-To: <JNc5h.194$3i6.48@newsfe03.lga>
References: <JNc5h.194$3i6.48@newsfe03.lga>
Message-ID: <1163301185.416625.243830@m73g2000cwd.googlegroups.com>

At my work we had the same problem.  We found that the best solution
was to use a thread with the code to handle the model dialog.  This
worked best for us because the only models in our product are the error
messages, and using a thread gave us the ability to check and see if
the modal dialog was found.

In this post there is some example code.  I will post up a more
complete solution when I get to work on monday.

http://groups.google.com/group/comp.lang.python/browse_thread/thread/ea9a63aaeaecb591/ee7ec7cf2d12801d?lnk=gst&q=findtopwindow&rnum=1&hl=en#ee7ec7cf2d12801d



From Roberto.Bonvallet at cern.ch  Tue Nov 21 10:18:12 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Tue, 21 Nov 2006 15:18:12 +0000 (UTC)
Subject: interleaving dictionary values
References: <1164119672.455899.292380@e3g2000cwe.googlegroups.com>
Message-ID: <ejv5bk$qnp$1@cernne03.cern.ch>

j1o1h1n at gmail.com wrote:
[...]
> I had in mind something like this:
> 
>>>> interleave([1, 2, 3], [4,5], [7, 8, 9])
> [1, 4, 7, 2, 5, 8, 3, 9]

[...]
> But instead I (finally worked out I could) do this:
> 
>  apply(map, tuple([None] + d.values()))

apply is deprecated, it should be map(None, *d.values())

> So... my bit of code becomes:
> 
>  filter(None, flatten(map(None, apply(map, tuple([None] +
> d.values())))))
> 
> It fits on one line, but it feels far more evil than I set out to be.
> The brackets at the end are bad for my epilepsy.
> 
> Surely there is there some nice builtin function I have missed?

You have missed the "it doesn't need to be a one-liner" motto :)

>>> def interleave(*args):
...     result = []
...     for items in map(None, *args):
...         result.extend([x for x in items if x is not None])
...     return result
...
>>> interleave([1, 2, 3], [4,5], [7, 8, 9])
[1, 4, 7, 2, 5, 8, 3, 9]

Cheers,
-- 
Roberto Bonvallet


From msherman77 at yahoo.com  Wed Nov  1 09:05:46 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 1 Nov 2006 09:05:46 -0500 (EST)
Subject: report progress from C function
In-Reply-To: <eia90r$d4d$1@sea.gmane.org>
Message-ID: <20061101140546.35418.qmail@web88311.mail.re4.yahoo.com>

My assembler is very basic, so it wouldn't help, while
my C is OK, well sort of.

BTW. Neither have I looked at the machine code that
the assembler produces. 

--- Fredrik Lundh <fredrik at pythonware.com> wrote:

> Michael S wrote:
> 
> > I downloaded Pyrex and ran it through their own
> > example. The code looks quite messy, and I even
> saw a
> > few "goto"s. 
> 
> looked at the assembler output from your C compiler
> lately?
> 
> </F>
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From nszabolcs at gmail.com  Sat Nov 25 09:39:48 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 25 Nov 2006 06:39:48 -0800
Subject: Graph Data Structures
References: <mailman.714.1164463530.32031.python-list@python.org>
Message-ID: <1164465588.399198.173830@f16g2000cwb.googlegroups.com>

i haven't read your code, but there are many graph implementations in
python.
in case you haven't found these yet:
http://wiki.python.org/moin/PythonGraphApi

if you only want to do some analysis i think you need this one (as it's
pretty complete and simple):
https://networkx.lanl.gov/

i also recommend Guido's essay to read:
http://www.python.org/doc/essays/graphs.html



From no-spam at no-spam-no-spam.invalid  Wed Nov  8 11:57:21 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 08 Nov 2006 17:57:21 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <mailman.1858.1162935489.11739.python-list@python.org>
References: <eiddl5$qpn$1@news.albasani.net>
	<mailman.1858.1162935489.11739.python-list@python.org>
Message-ID: <eit29m$rmk$1@news.albasani.net>

Shane Hathaway wrote:
> of multiple cores.  I think Python only needs a nice way to share a
> relatively small set of objects using shared memory.  POSH goes in that
> direction, but I don't think it's simple enough yet.
> 
> http://poshmodule.sourceforge.net/

interesting, a solution possibly a little faster than pickling - but maybe only in selected situations. Made already experiments with pickling through shared memory.

With "x = posh.share(x)" an object tree will be (deep-)copied to shared mem ( as far as objects fullfil some conditions http://poshmodule.sourceforge.net/posh/html/node6.html: is this true for numpy arrays?)
Every object to be inserted in the hot tunnel object tree has to be copied that same style. Thus ~pickling, but somewhat easier to use.

And compiling it for Windows will be quite difficult ...

Robert


From no-spam at no-spam-no-spam.invalid  Fri Nov  3 05:30:17 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 11:30:17 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <mailman.1682.1162496489.11739.python-list@python.org>
References: <mailman.1682.1162496489.11739.python-list@python.org>
Message-ID: <eif5nr$6f0$1@news.albasani.net>

Jean-Paul Calderone wrote:
> On Thu, 2 Nov 2006 14:15:58 -0500, Jean-Paul Calderone 
> <exarkun at divmod.com> wrote:
>> On Thu, 02 Nov 2006 19:32:54 +0100, robert 
>> <no-spam at no-spam-no-spam.com> wrote:
>>> I'd like to use multiple CPU cores for selected time consuming Python 
>>> computations (incl. numpy/scipy) in a frictionless manner.
>>
>> NumPy releases the GIL in quite a few places.
> 
> Eh, no it doesn't.  Sorry for the misinformation.  I'll double check
> my memory first next time.
> 

only lin. alg and rare locations. But that doesn't make up my typical CPU load. 
Parallel execution of any varying Python code (and also Pyrex) without constantly thinking about C-level is definitely my real aim. (Otherwise I'd code most algs directly in C with less worries.)

robert


From gagsl-py at yahoo.com.ar  Wed Nov  8 18:09:57 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 20:09:57 -0300
Subject: help using smtplib to work ..
In-Reply-To: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061108195914.05a9e228@yahoo.com.ar>

At Wednesday 8/11/2006 19:23, NicolasG wrote:

>I'm using the following code to send e-mail through python:
>
>import smtplib
>
>fromaddr = 'myMail at gmail.com'
>toaddrs  = 'myOtherMail at gmail.com'
>subject = 'someting for subject !'
>
>msg = 'This is body of the mail.'
>
>msg = 'From: ' + fromaddr + '\nTo: ' + toaddrs + '\nSubject:' + subject
>+ '\n\n' + msg
>print "Message length is " + repr(len(msg))
>
>server = smtplib.SMTP('smtp.gmail.com')
>server.set_debuglevel(1)
>server.sendmail(fromaddr, toaddrs, msg)
>server.quit()
>
>send: 'mail FROM:<myMail at gmail.com> size=106\r\n'
>reply: '530 5.7.0 Must issue a STARTTLS command first
>s1sm7666914uge\r\n'
>
>What am I doing wrong ?

gmail.com requires authentication before sending mail. Try this 
sequence: ehlo, starttls, ehlo (again!), login, sendmail, quit
(BTW, you need a space after Subject:, and all \n should be \r\n)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Fri Nov 17 05:08:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 11:08:59 +0100
Subject: Bitwise operators. Differences from javascript and PHP.
In-Reply-To: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
References: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
Message-ID: <ejk1o4$qvf$1@sea.gmane.org>

skorobogatov at gmail.com wrote:

> I can't understand a little thing in bitwise operations.
> 
> In PHP and Javascript
> 4653896912>>13 = -212992
> 
> In Python and Ruby
> 4653896912>>13 = 568102
> 
> In Python and Ruby - it's ok. I understand.
> But i need to get in Python same value as in PHP and Javascript.

hint:

 >>> 4653896912 > sys.maxint
True

not sure what PHP is doing with that expression, really.

</F>



From mike.klaas at gmail.com  Thu Nov 30 16:14:55 2006
From: mike.klaas at gmail.com (Klaas)
Date: 30 Nov 2006 13:14:55 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <ekmodn$v11$1@minji.szn.dk>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<slrnemtoe2.oju.pkarjala@paju.oulu.fi> <ekmodn$v11$1@minji.szn.dk>
Message-ID: <1164921295.105742.213970@h54g2000cwb.googlegroups.com>

Klaus Alexander Seistrup wrote:
> Pekka Karjalainen wrote:
>
> > You can omit the call to math.sqrt if you test this instead.
> >
> >     y*y > x
> >
> > in place of if y > maxfact: .
>
> Or use
>
> 	sqrt = lambda x: x ** .5

Test it:

$ python -m timeit -s "from math import sqrt" "sqrt(5.6)"
1000000 loops, best of 3: 0.445 usec per loop
$ python -m timeit -s "sqrt = lambda x: x**.5" "sqrt(5.6)"
1000000 loops, best of 3: 0.782 usec per loop

Note that this overhead is almost entirely in function calls; calling
an empty lambda is more expensive than a c-level sqrt:

$ python -m timeit -s "sqrt = lambda x: x" "sqrt(5.6)"
1000000 loops, best of 3: 0.601 usec per loop

Just math ops:
$ python -m timeit -s "x = 5.6" "x*x"
10000000 loops, best of 3: 0.215 usec per loop
$ python -m timeit -s "x = 5.6" "x**.5"
1000000 loops, best of 3: 0.438 usec per loop

Of course, who knows that psyco does with this under the hood.

-Mike



From kibleur.christophe at gmail.com  Thu Nov  9 10:39:23 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 9 Nov 2006 07:39:23 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1162831146.195927.296110@e3g2000cwe.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
	<1162831146.195927.296110@e3g2000cwe.googlegroups.com>
Message-ID: <1163086763.536524.37710@h48g2000cwc.googlegroups.com>


David Boddie a ?crit :


> Do you mean the example from the PyQt4 distribution?
Yes, that was it.

> That uses a port of an old syntax highlighting example from Qt 4.0. Someone needs to
> "port" the C++ example from Qt 4.2 to PyQt4.

So, we've got no sample to use QScintilla2 ??

Thanks,
6TooL9



From skip at pobox.com  Wed Nov  8 15:46:32 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 14:46:32 -0600
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163010203.489775.308950@b28g2000cwb.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com> <4551FA0F.4000202@hotmail.com>
	<1163000984.575289.87230@i42g2000cwa.googlegroups.com>
	<1163010203.489775.308950@b28g2000cwb.googlegroups.com>
Message-ID: <17746.16936.161116.987303@montanaro.dyndns.org>


    olsongt> Does using foobar in examples count as profanity?

    olsongt> http://en.wikipedia.org/wiki/Foobar

Only if you spell it FUBAR, and even then it's a euphemism, so I think
you're safe. ;-)

Skip


From bsdforfree at rambler.ru  Wed Nov  8 09:41:59 2006
From: bsdforfree at rambler.ru (Vyacheslav Sotnikov)
Date: Wed, 08 Nov 2006 17:41:59 +0300
Subject: python Error: IndentationError: expected an indented block
In-Reply-To: <20061108142618.77660.qmail@web58114.mail.re3.yahoo.com>
References: <20061108142618.77660.qmail@web58114.mail.re3.yahoo.com>
Message-ID: <4551ECB7.8000304@rambler.ru>



Antonios Katsikadamos ?????:
> hi all. I am using python 2.4. I have to run an older python code and when i run it i get the following message
> 
> IndentationError: expected an indented block.
> 
> 1)what does this mean?

http://www.python.org/doc/2.4.3/ref/indentation.html

> 2)how can i overcome this problem

By syntax fixing

> 
> 
> Thanks for any advice.
> 
> kind regards,
> 
> Antonios
>  
> ---------------------------------
> Sponsored Link
> 
> Free Uniden 5.8GHz Phone System with Packet8 Internet Phone Service
> 


From rdiaz02 at gmail.com  Thu Nov 16 17:23:07 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Thu, 16 Nov 2006 23:23:07 +0100
Subject: About alternatives to Matlab
In-Reply-To: <1163711343.870829.110030@h48g2000cwc.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <624934630611161423x2ca295a1q1bb2df181e87f9fb@mail.gmail.com>

R (http://cran.r-project.org) might be an alternative, specially if
you do a lot of statistics and graphics. (R is probably the most
widely used language/system in statistical research).


R.

On 16 Nov 2006 13:09:03 -0800, sturlamolden <sturlamolden at yahoo.no> wrote:
> Boris wrote:
> > Hi, is there any alternative software for Matlab? Although Matlab is
> > powerful & popular among mathematical & engineering guys, it still
> > costs too much & not publicly open. So I wonder if there's similar
> > software/lang that is open & with comparable functionality, at least
> > for numerical aspect. Thanks!
>
> I have used Matlab for years, and has recently changed to Python. In
> addition one needs NumPy and Matplotlib, and perhaps SciPy. Other
> useful packages are PyGTK for GUI, PyGame for multimedia, PyOpenGL for
> 3D graphics, Mpi4Py for parallel computation, etc. You will find python
> packages for nearly any conceivable task. Unlike Matlab, Python is a
> general purpose programming language, and a distant cousin of Lisp. The
> Python language is fare more expressive and productive than Matlab, yet
> even more easy to use.
>
> The NumPy package is the core requirement for numerical work in Python.
> It is quite different form Matlab, but I think it is more powerful.
> Particularly, arrays are passed by reference (not by value), and
> indexing creates view matrices.
>
> To compare Matlab with NumPy we can e.g. use the D4 discrete wavelet
> transform. I have here coded it in Matlab and Python/NumPy using Tim
> Swelden's lifting scheme.
>
> First the Matlab version (D4_Transform.m):
>
> function x = D4_Transform(x)
>    % D4 Wavelet transform in Matlab
>    % (C) Sturla Molden
>    C1 =  1.7320508075688772;
>    C2 =  0.4330127018922193;
>    C3 = -0.066987298107780702;
>    C4 =  0.51763809020504137;
>    C5 =  1.9318516525781364;
>    s1 = zeros(ceil(size(x)/2));
>    d1 = zeros(ceil(size(x)/2));
>    d2 = zeros(ceil(size(x)/2));
>    odd = x(2:2:end);
>    even = x(1:2:end-1);
>    d1(:) = odd - C2*even;
>    s1(1) = even(1) + C2*d1(1) + C3*d1(end);
>    s1(2:end) = even(2:end) + C2*d1(2:end) + C3*d1(1:end-1);
>    d2(1) = d1(1) + s1(end);
>    d2(2:end) = d1(2:end) + s1(1:end-1);
>    x(1:2:end-1) = C4*s1;
>    x(2:2:end) = C5*d2;
>    if (length(x) >2)
>       x(1:2:end-1) = D4_Transform(x(1:2:end-1));
>    end
>
>
> Then the Python version (D4.py):
>
> import numpy
> import time
>
> def D4_Transform(x, s1=None, d1=None, d2=None):
>    """
>    D4 Wavelet transform in NumPy
>    (C) Sturla Molden
>    """
>    C1 = 1.7320508075688772
>    C2 = 0.4330127018922193
>    C3 = -0.066987298107780702
>    C4 = 0.51763809020504137
>    C5 = 1.9318516525781364
>    if d1 == None:
>       d1 = numpy.zeros(x.size/2)
>       s1 = numpy.zeros(x.size/2)
>       d2 = numpy.zeros(x.size/2)
>    odd = x[1::2]
>    even = x[:-1:2]
>    d1[:] = odd[:] - C1*even[:]
>    s1[0] = even[0] + C2*d1[0] + C3*d1[-1]
>    s1[1:] = even[1:] + C2*d1[1:] + C3*d1[:-1]
>    d2[0] = d1[0] + s1[-1]
>    d2[1:] = d1[1:] + s1[:-1]
>    even[:] = C4 * s1[:]
>    odd[:] = C5 * d2[:]
>    if x.size > 2:
>
> D4_Transform(even,s1[0:even.size/2],d1[0:even.size/2],d2[0:even.size/2])
>
> if __name__ == "__main__":
>    x = numpy.random.rand(2**23)
>    t0 = time.clock()
>    D4_Transform(x)
>    t = time.clock()
>    print "Elapsed time is %.6f seconds" % (t-t0)
>
>
> Now let's do benchmark on my laptop (1.73 GHz Pentium M, 0.99 GB RAM).
> I have stopped paying for Matlab maintenance (for reasons that will be
> obvious), so I only have R14 Service Pack 2 for comparison.
>
> First we try Matlab (R14 Service Pack 2):
>
> >> x = rand(2^23,1);
> >> tic; D4_Transform(x); toc
> Elapsed time is 27.145438 seconds.
>
>
> Then we Python 2.4.4 with NumPy 1.0:
>
> C:\develop\python\D4>python D4.py
> Elapsed time is 3.364887 seconds
>
> That is quite astonishing.
>
> If anyone wonders why I think Travis Oliphant and the NumPy team should
> be knighted, then this is the answer. The Mathworks' product only
> achieved 100% * 3/27 = 11% the speed of Python/NumPy, and is infinitely
> more expensive.
>
> Does anyone wonder why I am not paying for Matlab maintenance anymore?
>
> Sorry Mathworks, I have used your product for years, but you cannot
> compete with NumPy.
>
>
> Cheers,
> Sturla Molden
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


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


From tim.hochberg at ieee.org  Sat Nov 18 01:08:11 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Fri, 17 Nov 2006 23:08:11 -0700
Subject: How can I speed this function up?
In-Reply-To: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <ejm81b$k9n$1@sea.gmane.org>

Chris wrote:
> This is just some dummy code to mimic what's being done in the real 
> code. The actual code is python which is used as a scripting language in 
> a third party app. The data structure returned by the app is more or 
> less like the "data" list in the code below. The test for "ELEMENT" is 
> necessary ... it just evaluates to true every time in this test code. In 
> the real app perhaps 90% of tests will also be true.
> 
> So my question is how can I speed up what's happening inside the 
> function write_data()? Only allowed to use vanilla python (no psycho or 
> other libraries outside of a vanilla python install).

Try collecting your output into bigger chunks before writing it out. For 
example, take a look at:

def write_data2(out, data):
     buffer = []
     append = buffer.append
     extend = buffer.extend
     for i in data:
         if i[0] == 'ELEMENT':
             append("ELEMENT %06d " % i[1])
             extend(map(str, i[2]))
             append('\n')
     out.write(''.join(buffer))


def write_data3(out, data):
     buffer = []
     append = buffer.append
     for i in data:
         if i[0] == 'ELEMENT':
             append(("ELEMENT %06d %s" % (i[1],' '.join(map(str,i[2])))))
     out.write('\n'.join(buffer))


Both of these run almost twice as fast as the original below (although 
admittedly I didn't check that they were actually right). Using some of 
the other suggestions mentioned in this thread may make things better 
still. It's possible that some intermediate chunk size might be better 
than collecting everything into one string, I dunno.

cStringIO might be helpful here as a buffer instead of using lists, but 
I don't have time to try it right now.

-tim


> 
> I have a vested interest in showing a colleague that a python app can 
> yield results in a time comparable to his C-app, which he feels is mch 
> faster. I'd like to know what I can do within the constraints of the 
> python language to get the best speed possible. Hope someone can help.
> 
> def write_data1(out, data):
>      for i in data:
>          if i[0] is 'ELEMENT':
>              out.write("%s %06d " % (i[0], i[1]))
>              for j in i[2]:
>                  out.write("%d " % (j))
>              out.write("\n")
> 
> import timeit
> 
> # basic data mimicing data returned from 3rd party app
> data = []
> for i in range(500000):
>      data.append(("ELEMENT", i, (1,2,3,4,5,6)))
> 
> # write data out to file
> fname = "test2.txt"
> out = open(fname,'w')
> start= timeit.time.clock()
> write_data2(out, data)
> out.close()
> print timeit.time.clock()-start
> 
> 



From bugs at almad.net  Mon Nov  6 11:09:44 2006
From: bugs at almad.net (Almad)
Date: 6 Nov 2006 08:09:44 -0800
Subject: Problem with XML-RPC not mounted in /
In-Reply-To: <1162807451.890014.307850@k70g2000cwa.googlegroups.com>
References: <1162807451.890014.307850@k70g2000cwa.googlegroups.com>
Message-ID: <1162829384.394653.230090@b28g2000cwb.googlegroups.com>

Just FYI, this is bug in CP filter machinery, xmlrpc filter do not
apply recursively so do not dispatch reuqest.

Quick fix is to xmlrpcfilter.on not only on /ws, but also on /ws/main

Regards,

Almad



From bj_666 at gmx.net  Tue Nov 14 01:54:35 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 14 Nov 2006 07:54:35 +0100
Subject: to  setattr or def setProp()
References: <1163485203.560900.286430@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.14.06.54.33.897926@gmx.net>

In <1163485203.560900.286430 at b28g2000cwb.googlegroups.com>,
jm.suresh at no.spam.gmail.com wrote:

> I have a class for rectangle and it has two points in its __slots__ .
> However, we can derive a number of properties like width, height,
> centerPoint etc from these two points. Now, I want to be able to set
> and get these properties directly from the instances. I can either def
> __setattr__ , __getattr__  or I can define function for each property
> like setWidth(), setHeight() .

Or you can use `property()` to create "computed attributes".

Ciao,
	Marc 'BlackJack' Rintsch


From anthra.norell at vtxmail.ch  Wed Nov 29 03:59:21 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 29 Nov 2006 09:59:21 +0100
Subject: splitting a long string into a list
In-Reply-To: <1164698637.721659.169240@n67g2000cwd.googlegroups.com>
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>	<mailman.788.1164693655.32031.python-list@python.org>
	<1164698637.721659.169240@n67g2000cwd.googlegroups.com>
Message-ID: <456D4BE9.7010700@vtxmail.ch>

ronrsr wrote:
> still having a heckuva time with this.
>
> here's where it stand - the split function doesn't seem to work the way
> i expect it to.
>
>
> longkw1,type(longkw):   Agricultural subsidies; Foreign
> aid;Agriculture; Sustainable Agriculture - Support; Organic
> Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> <type 'list'> 1
>
> longkw.replace(',',';')
>
> Agricultural subsidies; Foreign aid;Agriculture; Sustainable
> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> Development
>
>
>  kw = longkw.split("; ,")    #kw is now a list of len 1
>
> kw,typekw= ['Agricultural subsidies; Foreign aid;Agriculture;
> Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
> Childhood Development, Birth Defects; Toxic Chemicals;Antibiotics,
> Animals;Agricultural Subsidies
>
>
> what I would like is to break the string into a list of the delimited
> words, but have had no luck doing that - I thought split wuld do that,
> but it doens't.
>
> bests,
>
> -rsr-
>
>
>   

 >>> import SE    # http://cheeseshop.python.org/pypi/SE/2.3

 >>> Split_Marker = SE.SE (' ,=|  ;=| ')    # Translates both ',' and 
';' into an arbitrary split mark ('|')
 >>> for item in Split_Marker (longstring).split ('|'): print item

Agricultural subsidies
 Foreign aidAgriculture
Sustainable Agriculture - Support
 Organic Agriculture

... etc.

To get rid of the the leading space on some lines simply add 
corresponding replacements. SE does any number of substitutions in one 
pass. Defining them is a simple matter of writing them up in one single 
string from which the translator object is made:

 >>> Split_Marker = SE.SE (' ,=|  ;=|  ", =|"  "; =|" ')
 >>> for item in Split_Marker (longstring).split ('|'): print item

Agricultural subsidies
Foreign aidAgriculture
Sustainable Agriculture - Support
Organic Agriculture


Regards

Frederic




From nospam at domain.tld  Tue Nov 21 05:41:50 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Tue, 21 Nov 2006 11:41:50 +0100
Subject: how to call user defined TCL procedures from python script?
References: <1164103655.930495.306850@h48g2000cwc.googlegroups.com>
Message-ID: <ejul5e$puj$1@kohl.informatik.uni-bremen.de>

comp.lang.python wrote:

> I am looking for the way to include user define TCL lib to python
> script and call those user define functions from python script.

If you import Tkinter and then evaluate Tcl-Script, passing back the results
a strings into Python. Example:


>>> import Tkinter
>>> tcl=Tkinter.Tk()
>>> tcl.withdraw()
''
>>> tcl.eval("puts hello")
hello
''

With this you can load Tcl-Libs ("package require ..."), execute the needed
functionality and "return $VALUE" to pass results to Python.

HTH
Stephan



From aboudouvas at panafonet.gr  Wed Nov 22 11:05:12 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 22 Nov 2006 08:05:12 -0800
Subject: Python visual IDE
In-Reply-To: <_DZ8h.3237$pM.2926@newsfe13.lga>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
	<1164205868.349589.217040@k70g2000cwa.googlegroups.com>
	<1164206609.276356.165670@m73g2000cwd.googlegroups.com>
	<_DZ8h.3237$pM.2926@newsfe13.lga>
Message-ID: <1164211512.078332.73450@e3g2000cwe.googlegroups.com>


I didn't know about this product you mention (wxDesigner).
I download the trial and it seems pretty good, reminds me the wxGlade.

So you make the GUI in this, generate Python code and import the module

on your main project and reference it respectively ??

On Nov 22, 4:58 pm, hg <h... at nospam.com> wrote:
> king kikapu wrote:
> > I have already downloaded and seen the trial of Komodo Professional.
> > Indeed it has a simple Gui Builder but one can only use TKinter on it.
> > No wxWidgets support and far from truly RAD, but it is the only
> > "integrated"
> > GUI builder in these IDEs...
>
> > On Nov 22, 4:31 pm, "Steve" <s... at ferg.org> wrote:
> >> I haven't used it but Komodo (Professional version) says it has:
>
> >> ActiveState GUI Builder (Komodo Professional only)
>
> >> Enhance your applications with GUI dialogs: Simple, Tk-based dialog
> >> builder with seamless round-trip integration, for Perl, Python, Ruby,
> >> and Tcl.I do a lot of GUI programming with wxPython.
>
> I find that switching from desktop 1 (Eclipse/PyDev) to desktop 2
> (wxDesigner) becomes a reflex quite quickly ... even under Windows
> thanks to virtuawin (http://virtuawin.sourceforge.net) - both packages
> also are smart enough to notice when an open file has been modified
> elsewhere.
>
> I also program in Visual-Studio and overall do not find the RAD/IDE
> integration that much more convenient.
>
> Also, I generally get the job done in wxDesigner at the beginning of the
> project, and seldom have to get back into it to twick the interface.
> 
> hg- Hide quoted text -- Show quoted text -



From nateastle at gmail.com  Mon Nov 20 17:09:42 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 20 Nov 2006 14:09:42 -0800
Subject: basic python questions
In-Reply-To: <mailman.507.1164039215.32031.python-list@python.org>
References: <mailman.507.1164039215.32031.python-list@python.org>
Message-ID: <1164060582.633889.229150@f16g2000cwb.googlegroups.com>

I tried ironpython, when it worked it worked rather well. There were a
couple of things I didn't like about it which was enough for me not to
use it. If the program broke ie array out of bounds or some other run
time error vs would crash and restart with the debugger still attached
to another proccess which forced me to close out vs and restart it.
That was the major issue I ran into. Other than that it worked out
really well with intellisense and debug capablities.


Sells, Fred wrote:
> since you're using .net, you might want to take a look at IronPython.  It's
> not something I use, but I've heard good things.
>
> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.org at python.org
> [mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
> Behalf Of nateastle at gmail.com
> Sent: Saturday, November 18, 2006 10:09 AM
> To: python-list at python.org
> Subject: Re: basic python questions
>
>
> I am currently going to school at Utah Valley State College, the course
> that I am taking is analysis of programming languages. It's an upper
> division course but our teacher wanted to teach us python as part of
> the course, he spent about 2 - 3 weeks on python which has been good. I
> currently work with .net and it is fun to see what other languages have
> and what sytax they use.
>
> Paul McGuire wrote:
> > <nateastle at gmail.com> wrote in message
> > news:1163829271.660193.70450 at j44g2000cwa.googlegroups.com...
> > >I have a simple assignment for school but am unsure where to go. The
> > > assignment is to read in a text file, split out the words and say which
> > > line each word appears in alphabetical order. I have the basic outline
> > > of the program done which is:
> > >
> >
> > And in general, this is one of the best "can anyone help me with my
> > homework?" posts I've ever seen.
> > A. You told us up front that it was your homework.
> > B. You made an honest stab at the solution before posting, and posted the
> > actual code.
> > C. You ended with some specific questions on things that didn't work or
> that
> > you wanted to improve.
> >
> > Your current program looks like at least A- material.  Add use of sorted
> and
> > enumerate, and handle that exception a little better, and you're getting
> > into A+ territory.
> >
> > Out of curiosity, what school are you attending that is teaching Python,
> and
> > under what course of study?
> >
> > -- Paul
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From svein at seldal dot com  Wed Nov  8 08:50:49 2006
From: svein at seldal dot com (Svein Seldal)
Date: Wed, 08 Nov 2006 14:50:49 +0100
Subject: Delivering data to python from a c-thread
Message-ID: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>

Hi,

I have a C-application that calls a Python function main(). This 
function will loop forever and not return until the entire application 
is about to terminate.

In a parallel C-thread, some data must be regularly delivered to the 
running python application. My initial plan was to call a py function 
deliver() from this thread, however I constantly run into troubles. I 
keep getting a "Fatal Python error: ceval: tstate mix-up" error from 
python, even when I handle the GIL with PyGILState_Ensure().

I fail to use PyEval_AcquireLock() prior to python call either, as the 
main app would then constantly keep this lock when its running 
permanently in python.

Basically I would the thread to stop the execution of the main py app, 
call the message function deliver(). When the function returns from 
python, resume the execution of the main pyapp.


Regards,
Svein Seldal





From diffuser78 at gmail.com  Thu Nov  2 11:03:41 2006
From: diffuser78 at gmail.com (Daniel)
Date: 2 Nov 2006 08:03:41 -0800
Subject: Help on writing P2P Streaming client
Message-ID: <1162483421.631558.178780@e3g2000cwe.googlegroups.com>

I want to write a P2P streaming client where ine user broadcasts and
many users receive the streaming content and forward like BitTorrent.

Can anybody provide pointers for starting in Python. I have done couple
of small projects in Python but I need to get this done.

Every help is appreciated.

Thanks



From tnleeuw at gmail.com  Tue Nov 28 02:48:44 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 27 Nov 2006 23:48:44 -0800
Subject: Porting Tkinter application to JYthon
In-Reply-To: <mailman.619.1164257988.32031.python-list@python.org>
References: <mailman.619.1164257988.32031.python-list@python.org>
Message-ID: <1164700124.160392.125440@14g2000cws.googlegroups.com>

Hi Sandip,

sandip desale wrote:
> Dear All,
>
> We have a Tcl/Tk application written using Python 2.2. Using this application we want to call some customizable Java APIs. I tried porting Tcl/Tk application to Jython but not able to do the same as TKinter library is not available with JYthon.
>
> Can you please help me in porting Tkinter application to Jython? Also kindly let me know how to do the same.
>
>
> Thanks & Regards,
> Sandip Desale
>

In response to my previous post I got an e-mail suggesting to look at
JPype; however that message wasn't posted to the list, despite a CC: to
python-list at python.org. And it seems that you haven't received the
message either.

Anyways, here's the URL for the JPype project which allows the use of
Java libraries from Python:

http://jpype.sourceforge.net/

I downloaded it for windows and it seems to work quite OK, although I
only did some toy-testing (opening a Swing filechooser window from
within PythonWin, for instance).

The purpose of the project is calling Java code from Python, and it has
some limited facilities to allow callbacks from Java to Python. I think
therefore that it fits very well what you and I would need: integration
of Java libraries into Python projects.

It does not, however, allow subclassing of Java classes in Python or
the other way round, and it does not allow calling of arbitrary Python
code from the JVM.

Cheers,

--Tim



From wo_shi_big_stomach at mac.com  Sat Nov 25 10:58:26 2006
From: wo_shi_big_stomach at mac.com (wo_shi_big_stomach)
Date: Sat, 25 Nov 2006 07:58:26 -0800
Subject: combining the path and fileinput modules
In-Reply-To: <7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
	<7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
Message-ID: <45686822.8030204@mac.com>

Gabriel Genellina wrote:
> At Saturday 25/11/2006 00:14, wo_shi_big_stomach wrote:
> 
>> > The filter should be applied to walkfiles. Something like this:
>> >
>> > dir = path(/home/wsbs/Maildir)
>> > for f in filter(os.path.isfile, dir.walkfiles('*')):
>> >         #
>> >         # test:
>> >         # print f
>>
>> Thanks, this way f will print the full pathname/filename. But f already
>> does that using Jason Orendorff's path module:
>>
>> dir = path('/home/wsbs/Maildir')
>> for f in dir.walkfiles('*'):
>>         print f
> 
> The filter is used to exclude directories. fileinput can't handle
> directories.

???

Both routines above produce identical output -- full path/filenames.
Neither prints just a directory name.

> 
>> At this point I believe the error has to do with fileinput, not the path
>> or os.path modules.
>>
>> If I give fileinput.input() a hardcoded path/filename in place of 'f'
>> the program runs. However the program will not accept either f or 'f' as
>> an argument to fileinput.input().
> 
> Tried with (f,) ?
> Notice that *this* error is not the same as your previous error.

  File "p2.py", line 23, in ?
    for line in fileinput.input(f,):
  File
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/fileinput.py",
line 231, in next
    line = self.readline()
  File
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/fileinput.py",
line 320, in readline
    self._file = open(self._filename, "r")

This looks similar to before -- fileinput.input() still isn't operating
on the input.

Again, I'm looking 1) walk through all files in a directory tree and 2)
using fileinput, evaluate and possibly edit the files.

The current version of the program is below.

thanks!

/wsbs

# start of program
import fileinput
import os
import re
import string
import sys
from path import path

# p2.py - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with "From "
# for each match, program deletes line

# recurse dirs
dir = path('/home/wsbs/Maildir')
#for f in dir.walkfiles('*'):
for f in filter(os.path.isfile, dir.walkfiles('*')):
	#
	# test: this will print the full path/filename of each file
	# print f
	#
	# open file, search, change if necessary, write backup
	for line in fileinput.input(f,):
	# just print 2nd and subsequent lines
  		if not fileinput.isfirstline():
			print line.rstrip('\n')
		# check first line only
		elif fileinput.isfirstline():
 			if not re.search('^From ',line):
 				print line.rstrip('\n')
	fileinput.close()

# end of program


From lichray at gmail.com  Thu Nov  9 04:58:14 2006
From: lichray at gmail.com (Lich_Ray)
Date: 9 Nov 2006 01:58:14 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
Message-ID: <1163066294.697993.148680@h48g2000cwc.googlegroups.com>

jEdit
Vim, it can handle all the things.
http://www.vim.org/



From gagsl-py at yahoo.com.ar  Wed Nov  8 21:09:07 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 23:09:07 -0300
Subject: Python to tell what is the IP of my PC .
In-Reply-To: <7d2580610611081618g69db3e25k6d21cd6d1f15d8a7@mail.gmail.co
 m>
References: <B57127370.889.19118.1@mxextra>
	<9afea2ac0611081600r7b2deb49pde0a6477bab7c7ca@mail.gmail.com>
	<7d2580610611081618g69db3e25k6d21cd6d1f15d8a7@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061108230430.0573c858@yahoo.com.ar>

At Wednesday 8/11/2006 21:18, Nicolas G wrote:

> > How can I use python to get the real IP address of my DSL router (when
> > my PC is part of the local home LAN) ?
>
><http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/162994
>
>import
>  win32api raise the error "module not exsit"
>and
>socket.gethostbyname(name)the router doesn't have a hostname.

Use the small script in the recipe's comments section.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From steve at ferg.org  Wed Nov 22 09:31:08 2006
From: steve at ferg.org (Steve)
Date: 22 Nov 2006 06:31:08 -0800
Subject: Python visual IDE
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
Message-ID: <1164205868.349589.217040@k70g2000cwa.googlegroups.com>

I haven't used it but Komodo (Professional version) says it has:

ActiveState GUI Builder (Komodo Professional only)

Enhance your applications with GUI dialogs: Simple, Tk-based dialog
builder with seamless round-trip integration, for Perl, Python, Ruby,
and Tcl.



From timothy at open-networks.net  Sun Nov  5 07:33:29 2006
From: timothy at open-networks.net (timmy)
Date: Sun, 05 Nov 2006 22:33:29 +1000
Subject: python GUIs comparison (want)
In-Reply-To: <1162708081.974808.283370@i42g2000cwa.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
	<1162708081.974808.283370@i42g2000cwa.googlegroups.com>
Message-ID: <454dd9a8$1@quokka.wn.com.au>

Mudcat wrote:
> When you say far better widgets, do you mean that it has a greater
> number of widgets to choose from, or that the types of widgets are
> basically the same but have a greater amount of flexibility in them?


by better i mean more of them to choose from and the functionality they 
provide.


when i started working with wx i discovered widgets i hadn't even seen 
before. and if you can't find a widget to suit, it's easy to make one.


From filipwasilewski at gmail.com  Sun Nov 19 15:33:27 2006
From: filipwasilewski at gmail.com (Filip Wasilewski)
Date: 19 Nov 2006 12:33:27 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163956689.091059.319400@b28g2000cwb.googlegroups.com>
Message-ID: <1163968407.464913.196640@k70g2000cwa.googlegroups.com>

sturlamolden wrote:
>
> Actually, there was a typo in the original code. I used d1[l-1] where I
> should have used d1[l+1]. Arrgh. Here is the corrected version, the
> Matlab code must be changed similarly. It has no relevance for the
> performance timings though.
>
>
> def D4_Transform(x, s1=None, d1=None, d2=None):
>     """
>     D4 Wavelet transform in NumPy
>     (C) Sturla Molden
>     """
>     C1 = 1.7320508075688772
>     C2 = 0.4330127018922193
>     C3 = -0.066987298107780702
>     C4 = 0.51763809020504137
>     C5 = 1.9318516525781364
>     if d1 == None:
>        d1 = numpy.zeros(x.size/2)
>        s1 = numpy.zeros(x.size/2)
>        d2 = numpy.zeros(x.size/2)
>     odd = x[1::2]
>     even = x[:-1:2]
>     d1[:] = odd[:] - C1*even[:]
>     s1[:-1] = even[:-1] + C2*d1[:-1] + C3*d1[1:]
>     s1[-1] = even[-1] + C2*d1[-1] + C3*d1[0]
>     d2[0] = d1[0] + s1[-1]
>     d2[1:] = d1[1:] + s1[:-1]
>     even[:] = C4 * s1[:]
>     odd[:] = C5 * d2[:]

If you swap C4 with C5 then our solutions give identical results and
both match the classic dwt approach:

    even[:] = C5 * s1[:]
    odd[:] = C4 * d2[:]

>     if x.size > 2:
>     D4_Transform(even,s1[0:even.size/2],
>             d1[0:even.size/2],d2[0:even.size/2])

cheers,
fw



From mikael at isy.liu.se  Tue Nov 14 04:37:42 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 14 Nov 2006 10:37:42 +0100
Subject: deleteing item from a copy of a list
In-Reply-To: <455984b5@quokka.wn.com.au>
References: <455984b5@quokka.wn.com.au>
Message-ID: <45598E66.2010100@isy.liu.se>

timmy wrote:
> i make a copy of a list, and delete an item from it and it deletes it 
> from the orginal as well, what the hell is going on?!?!?!
>
> #create the staff copy of the roster
> 	Roster2 = []
> 	for ShiftLine in Roster:
> 		#delete phone number from staff copy
> 		Roster2.append(ShiftLine)
> 		del Roster2[len(Roster2)-1][1]
>
> Roster2 should have nothing to do with Roster, right??? doing a print of 
> both lists confirms that the phone number has been removed from both
>   

First of all, you could have said

    del Roster2[-1][1]

since negative indices count backwards from the end of the list. This 
has nothing to do with your problem, though.

Fredrik has already given you a correct, somewhat condensed, answer. Let 
me elaborate. I guess that Roster is a list of lists. Then actually, it 
is a list of references to lists (really a reference to a list of 
references to lists). Your for-loop makes Roster2 a shallow copy of 
Roster, i.e. Roster2 is a new list with references to the _same_ 
sublists as in Roster. So, Roster2[-1] references the same object as 
Roster[-1], not a copy of it. To get copies, you could change your 
.append-line to

    Roster2.append(ShiftLine[:])

which gives you shallow copies of the sublists. If there are mutables in 
the sublists, you may still get into trouble. In that case, maybe you 
should take a look at copy.deepcopy.

HTH
/MiO


From fredrik at pythonware.com  Fri Nov 17 15:25:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 21:25:34 +0100
Subject: Decimal() instead of float?
In-Reply-To: <1163794251.5107.151.camel@pepper>
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org>	<1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com>	<ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper>
Message-ID: <ejl5s5$334$1@sea.gmane.org>

Michael B. Trausch wrote:

> I don't have (so far as I know) a 64-bit float available to me.

as mentioned in the documentation, Python's "float" datatype is 
implemented C doubles, which is 64-bit IEEE on all major platforms.

> Some of the lat/long pairs that I have used seem to come out fine, but 
> some do not.  Because the mathmatics used with them involve complex 
> equations when determining distance and the like, any error gets 
> massively compounded before a final result is evident.

sorry, but I don't think you have the slightest idea what you're doing, 
really.

</F>



From rridge at csclub.uwaterloo.ca  Wed Nov  8 08:21:03 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 8 Nov 2006 05:21:03 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<1162939715.915139.146890@b28g2000cwb.googlegroups.com>
	<455166B6.6040009@v.loewis.de>
Message-ID: <1162992063.382185.5440@h48g2000cwc.googlegroups.com>

Ross Ridge schrieb:
> So give an example where reference counting is unsafe.

Martin v. L?wis wrote:
> Nobody claimed that, in that thread. Instead, the claim was
> "Atomic increment and decrement instructions are not by themselves
> sufficient to make reference counting safe."

So give an example of where atomic increment and decrement instructions
are not by themselves sufficent to make reference counting safe.

> I did give an example, in <4550cc64$0$3462$9b622d9e at news.freenet.de>.
> Even though f_name is reference-counted, it might happen that you get a
> dangling pointer.

Your example is of how access to the "f_name" member is unsafe, not of
how reference counting being unsafe.  The same sort of race condition
can without reference counting being involved at all.  Consider the
"f_fp" member: if one thread tries to use "printf()" on it while
another thread calls "fclose()", then you can have same problem.  The
race condition here doesn't happen because reference counting hasn't
been made safe, nor does it happen because stdio isn't thread-safe.  It
happens because accessing "f_fp" (without the GIL) is unsafe.

The problem your describing isn't that reference counting hasn't been
made safe.  What you and Joe seem to be trying to say is that atomic
increment and decrement instructions alone don't make accessing shared
structure members safe.
                                       Ross Ridge



From nulla.epistola at web.de  Tue Nov 21 14:17:50 2006
From: nulla.epistola at web.de (Hertha Steck)
Date: Tue, 21 Nov 2006 20:17:50 +0100
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
	<pan.2006.11.19.16.59.35.983108@web.de>
	<1163975565.887782.93050@h48g2000cwc.googlegroups.com>
	<pan.2006.11.20.13.51.29.845474@web.de>
	<1164053491.979593.51210@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.21.19.17.49.483505@web.de>

Am Mon, 20 Nov 2006 12:11:32 -0800 schrieb John (Z R) L:

>> First of all: did you try to run the script using PythonWin and did you
>> run it in a command window? What happened? What error messages did you
>> get, if any?
>>
>> The script itself doesn't contain any errors. And in my IDLE it behaves
>> perfectly well.
>>
>> And please, if you answer, keep the text you are answering. This is no web
>> forum where you can see several postings at once.
> 
> The script is running perfectly fine now for some strange reason?? But
> previously it wasn't.
> 
> I always type my script in a new Window of the IDLE interface, and when
> I do "Run Module", the output appears in the main Python Shell (IDLE).
> 
> When I tried to run the script, "1,2,4" would appear, but the new
> prompt (>>>) DOESN'T appear. So when I want to run other modules that I
> made, Python Shell will say something like "Can't run script, in the
> middle of another module process.".
> 
> So I have to exit the Python Shell, and then it says "You are currently
> running a module, kill it?". I click "Yes", but when I reenter the
> program, "1,2,4" suddenly appear on the output, then the program
> immediately exits within half a second.
> 

All this looks like a script with an endless loop in it. But in the code
you posted there is no loop at all.

> I solve this by deleting the .py and .pyc file which it keeps on
> displaying, and the Python IDLE gets reset.
> 

Then I suppose you typed the script again from scratch? Possibly you had
some error in it that didn't show in your posting. But I don't think that
can be cleared up now.

> I don't have to delete stuff anymore because the scripts are running
> fine now. But I'm worried that this error will happen again
> (randomly?!), and I'll be in for more inconvenience...

If that happens: try your script in the command window. And if at all
possible, look at it in a hex viewer to find not printable characters that
might corrupt the file. And post again, but be sure to cut and paste your
code.



From vd12005 at yahoo.fr  Sat Nov  4 10:38:50 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 4 Nov 2006 07:38:50 -0800
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <1162645666.472394.150250@e3g2000cwe.googlegroups.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
	<7xirhwi438.fsf@ruckus.brouhaha.com>
	<slrnekopjh.10a.nick@irishsea.home.craig-wood.com>
	<1162645666.472394.150250@e3g2000cwe.googlegroups.com>
Message-ID: <1162654730.813129.269480@m73g2000cwd.googlegroups.com>


just to be sure about intern, it is used as :

>>> d, f = {}, {}
>>> s = "this is a string"
>>> d[intern(s)] = 1
>>> f[intern(s)] = 1

so actually the key in d and f are a pointer on an the same intern-ed
string? if so it can be interesting,

>>> print intern.__doc__
intern(string) -> string

``Intern'' the given string.  This enters the string in the (global)
table of interned strings whose purpose is to speed up dictionary
lookups.
Return the string itself or the previously interned string object with
the
same value.

the comment here: "(Changed in version 2.3: Interned strings used to be
immortal, but you now need to keep a reference to the interned string
around.)", if it the string is used as a key, it is still reference-d,
am i right?



From bray at sent.com  Tue Nov  7 12:38:38 2006
From: bray at sent.com (bray at sent.com)
Date: Tue, 07 Nov 2006 11:38:38 -0600
Subject: ChiPy (Special) Meeting, Tuesday 14th 5:30 pm.
Message-ID: <1162921118.26732.275232016@webmail.messagingengine.com>

NOTE: This is a special meeting on next Tuesday in addition to our
normal Thursday meeting. Attend both, if you can. 

Tuesday. November 14 2006. 5:30 pm. 

Topics
------

Ed Leaf on Dabo is an open-source framework for developing desktop
(i.e., rich client) applications in Python. 

Details
=======

Dabo is an open-source framework for developing desktop (i.e., rich
client) applications in Python. Its primary target is the group of
developers who come from a background in the proprietary
Microsoft-centric tools, such as Visual FoxPro and Visual Basic, but it
also targets Delphi, Filemaker, and other desktop application
development systems who want rich client applications that run
unmodified on Windows, Linux and OS X.

The focus of the talk will be on the visual tools available in Dabo to
help you quickly develop serious database applications in Python. Parts
of the talk will also be directed toward existing wxPython developers
who love the results of working with that UI toolkit, but who hate the
non-Pythonic interface. 


Location
--------

Monadnock Building at 53 W. Jackson in downtown Chicago: 
Conference Room 826.

Alternatively, if we need more space, we will relocate to the restaurant
on the first floor: http://www.cavanaughschicago.com. We will leave a
note with the gaurd in case we relocate.

RSVP to carl at personnelware.com  

Stay tuned to the mailing list for more details. 
http://mail.python.org/mailman/listinfo/chicago


About ChiPy
-----------

ChiPy is a group of Chicago Python Programmers, l33t, and n00bs.
Meetings are held monthly at various locations around Chicago.
Also, ChiPy is a proud sponsor of many Open Source and Educational
efforts in Chicago. Stay tuned to the mailing list for more info.

ChiPy website: <http://chipy.org>
ChiPy Mailing List: <http://mail.python.org/mailman/listinfo/chicago>
Python website: <http://python.org>

---




From no-spam at no-spam-no-spam.invalid  Fri Nov  3 12:30:12 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 18:30:12 +0100
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1715.1162568469.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>	<mailman.1678.1162491833.11739.python-list@python.org>	<eiden1$sj0$1@news.albasani.net>	<eifg8f$96s$1@wake.carmen.se>
	<mailman.1715.1162568469.11739.python-list@python.org>
Message-ID: <eifub5$ak9$1@news.albasani.net>

Robert Kern wrote:
> Magnus Lycka wrote:
>> robert wrote:
>>> When one follows ..
>>> http://docs.python.org/inst/tweak-flags.html#SECTION000622000000000000000 
>>> http://www.zope.org/Members/als/tips/win32_mingw_modules
>>>
>>> ..this seems only to cover the immediate python dll issues. What 
>>> happens with the C runtime libraries? You'll bind 2 different C-RTLs 
>>> (DLLs) etc.? And what happens for example with heap objects created 
>>> with one C-RTL and deleted/free'd with the other?
>>
>> As far as I understand, there should be only one runtime library
>> involved. MinGW relies on the Microsoft runtime. It seems some
>> people have had problems using MSVCRT71 with MinGW, but I'm sure
>> that e.g. the Enthought people can explain those issues, since they
>> bundle MinGW in their Python 2.4 distribution.
> 
> No, there are two if you use an unmodified Mingw distribution. Mingw is 
> built around MSVCRT.dll . For many extensions, this doesn't cause a 
> problem since things like FILE pointer don't cross C runtime boundaries. 
> One can edit gcc's spec file to make it use MSVCR71.dll . However, 
> Mingw's headers are still written for MSVCRT.dll and Microsoft changed 
> some of the internal details that they rely upon. For many (most?) 
> extensions, this won't matter, either. C++ extensions using iostreams 
> have a problem, IIRC. Unfortunately, neither approach works for all 
> extensions. It may even be the case that some extensions won't work 
> under *either* method.

In past I asked for linking Python2.5 and next Pythons on Win against such standard DLL (MSVCRT4 or MSVCRT.DLL)- yet Martin v. L?wis somehow explained in  
http://groups.google.de/group/comp.lang.python/msg/fcbe41f9df595c35
somehow that MSVCRT.dll is not intended for normal apps - only for "system-level components". 

Now I'm stun that MingW by default works with that library by default!
Another reason for my former request (in addition to ease of use with other compilers) was, that you don't have to package the big CRT7/8.. libs with frozen apps.


Robert


From fredrik at pythonware.com  Mon Nov 20 01:45:42 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 07:45:42 +0100
Subject: edit text in a file and save it again
In-Reply-To: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>
References: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>
Message-ID: <ejriun$kla$1@sea.gmane.org>

cyberco wrote:

> I must be overlooking something here... I'm trying to edit a line in a
> text file. I thought this was easy with fileinput, but all examples do
> not write the line back to the file but simply 'print' it. I want to
> open the file, edit the line and save it again. Is fileinput the right
> module for that?

   http://docs.python.org/lib/module-fileinput.html

   Optional in-place filtering: if the keyword argument inplace=1 is
   passed to input() or to the FileInput constructor, the file is moved
   to a backup file and standard output is directed to the input file (if
   a file of the same name as the backup file already exists, it will be
   replaced silently). This makes it possible to write a filter that
   rewrites its input file in place.

</F>



From sjmachin at lexicon.net  Sat Nov 25 18:04:52 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 15:04:52 -0800
Subject: Graph Data Structures
In-Reply-To: <mailman.725.1164493852.32031.python-list@python.org>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
Message-ID: <1164495892.406863.10090@m7g2000cwm.googlegroups.com>


Nathan Harmston wrote:
> > > https://networkx.lanl.gov/
>
> This was working for me earlier, I managed to get everything from
> there earlier. It seems a very good package. It seems theres more out
> there than what I had thought, which unfortunately makes it harder for
> me to decide what to use (pynetwork and bgl look useful aswell). I m
> going to do some testing on it later and see what happens with it.
> Thanks a lot for your help.
>
> Has anyone got an idea how I could split the contents of a node and
> its representation (to save memory in my graph). ie.... the nodes
> contain the start and end coordinates and id and the actual
> representation contains the string. I was going to have :
>
> class Node(object):
>     pass
>
> class Section(Node):
>     pass
>
> class Item(object):
>    pass
>
> Where section contains a slice of the Item which im interested. I m
> just not sure how I can access the contents of item without storing
> it. ---> If u get what I mean???

No. Not at all. "pass" is not very informative. Neither are
"representation" and "the string". Please tell us what you mean by
"slice". What is an "item", if it's not a "node"? Try listing out the
attributes of a node, with a couple of sample values for each, and then
we might get a clue.

What makes you think that you need to save memory?

What makes you think that you could save memory by splitting whatever
it is?

HTH,
John



From onurb at xiludom.gro  Tue Nov 21 06:00:31 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 21 Nov 2006 12:00:31 +0100
Subject: class method vs static method
In-Reply-To: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
References: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
Message-ID: <4562dc4f$0$10403$426a74cc@news.free.fr>

Chris Brat wrote:
> Hi,
> 
> I've done some reading up but I cant get my head around how/why class
> methods can be used as apposed to static methods.

a "static method" is actually not much more than a plain function
living in a class's namespace. classmethods, OTOH, have access to the
class object.

> Can anyone give an example of where they have used class methods?

The canonical use case is factory methods, but you'll typically find
other possible applications in frameworks.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mike$#at^&nospam!%trauschus  Thu Nov  2 09:41:40 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Thu, 02 Nov 2006 09:41:40 -0500
Subject: Using Python within a Python application.
Message-ID: <-sednZLF1Jg4ntfYnZ2dnUVZ_sqdnZ2d@comcast.com>

Hello, everyone.

I am doing some searching and winding up a little bit confused.  I have
a MUD client that I am writing using Python and wxWidgets, as some of
you may remember.  What I am looking to do now, is add "trigger"
functionality to it.  In essence, the application receives text from the
game, and if it is in any of the trigger definitions, it acts on it by
executing Python code that the user has associated with the action.

So, the question is, what is the safe way to do this?  I have found the
'compile' function, which returns a code object(?) which I would want to
execute using 'exec'.

Here is a hypothetical example:  I want to have a trigger that, when the
game sends the text "That really did HURT!", executes code to instruct
the character to ingest a potion to fix that problem.

In this situation, the user would provide 'That really did HURT!' as the
regular expression, which the game would examine, find that there are no
RE qualifiers in there (e.g., no $, ^, or similar to bind the string to
something else) and turn it into '.*(That really did HURT!).*' to match
it any time the game sends it (unless it breaks in the middle of a
transmission, which I wouldn't be quite sure how to handle, yet).

The associated code, let's say, would be something like:

========
Tmud.Send('quaff red')
========

Which would send the text to the game.

Eventually, I would want to support complex things, like handling $1 or
$2 which might be associated with saved portions of the regex, but I
will get there later.

The question is really two-fold:  How can I safely permit the user to
specify Python to be used as part of the game, and how can I create a
module that is used for the user's required functions (e.g., Tmud.Send,
as an example) without requiring each trigger to 'import' something?

I seem to be able to find tons of information on embedding Python in
C/C++/compiled language programs, but not much on safely executing it
within a Python program.  What I really want to do is prevent them from
calling anything that would affect the game client's runtime environment
-- at least from a trigger.  I want to later have some sort of "plug in"
mechanism that people could use to create graphs/charts/meters of
in-game events, but not yet, and that would be separate.

Any ideas?  Thanks in advance!

	-- Mike


From paddy3118 at netscape.net  Sun Nov 12 01:55:55 2006
From: paddy3118 at netscape.net (Paddy)
Date: 11 Nov 2006 22:55:55 -0800
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
Message-ID: <1163314554.972785.175860@h48g2000cwc.googlegroups.com>


Dustan wrote:

> Anyway, I figured out a way to get the builtin
> function 'sum' to work as I need:
> sum([[1,2,3],[4,5,6],[7,8,9]],  [])
>

Hah!
No-one expects sum to be used on anything but numbers.

Except lists as above.

No-one expects sum to be used on anything but numbers, and maybe lists
too.

;-)


(My apologies for my poor grasp of the Spanish Inquisition sketch; and
I was alluding to
this thread:
http://groups.google.com/group/comp.lang.python/msg/f34525384f8028b5 )



From no-spam at no-spam-no-spam.invalid  Thu Nov 16 04:17:05 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 16 Nov 2006 10:17:05 +0100
Subject: numpy/scipy: error of correlation coefficient (clumpy data)
In-Reply-To: <1163640918.373134.285490@m7g2000cwm.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
	<ejf6a7$fno$1@news.albasani.net>
	<1163640918.373134.285490@m7g2000cwm.googlegroups.com>
Message-ID: <ejhaak$g97$1@news.albasani.net>

sturlamolden wrote:
> robert wrote:
> 
>> here the bootstrap test will as well tell us, that the confidence intervall narrows down by a factor ~sqrt(10) - just the same as if there would be 10-fold more of well distributed "new" data. Thus this kind of error estimation has no reasonable basis for data which is not very good.
> 
> 
> The confidence intervals narrows when the amount of independent data
> increases. If you don't understand why, then you lack a basic
> understanding of statistics. Particularly, it is a fundamental
> assumption in most statistical models that the data samples are
> "IDENTICALLY AND INDEPENDENTLY DISTRIBUTED", often abbreviated "i.i.d."
> And it certainly is assumed in this case. If you tell the computer (or
> model) that you have i.i.d. data, it will assume it is i.i.d. data,
> even when its not. The fundamental law of computer science also applies
> to statistics: shit in = shit out. If you nevertheless provide data
> that are not i.i.d., like you just did, you will simply obtain invalid
> results.
> 
> The confidence interval concerns uncertainty about the value of a
> population parameter, not about the spread of your data sample. If you
> collect more INDEPENDENT data, you know more about the population from
> which the data was sampled. The confidence interval has the property
> that it will contain the unknown "true correlation" 95% of the times it
> is generated. Thus if you two samples WITH INDEPENDENT DATA from the
> same population, one small and one large, the large sample will
> generate a narrower confidence interval. Computer intensive methods
> like bootstrapping and asymptotic approximations derived analytically
> will behave similarly in this respect. However, if you are dumb enough
> to just provide duplications of your data, the computer is dumb enough
> to accept that they are obtained statistically independently. In
> statistical jargon this is called "pseudo-sampling", and is one of the
> most common fallacies among uneducated practitioners.

that duplication is just an extreme example to show my need: When I get the data, there can be an inherent filter/damping or other mean of clumping on the data which I don't know of beforehand. My model is basically linear (its a preparation step for ranking valuable input data for a classification task, thus for data reduction), just the degree of clumping in the data is unknown. Thus the formula for r is ok, but that bare i.i.d. formula for the error "(1-r**2)/sqrt(n)" (or bootstrap_test same) is blind on that.

> Statistical software doesn't prevent the practitioner from shooting
> himself in the leg; it actually makes it a lot easier. Anyone can paste
> data from Excel into SPSS and hit "ANOVA" in the menu. Whether the
> output makes any sense is a whole other story. One can duplicate each
> sample three or four times, and SPSS would be ignorant of that fact. It
> cannot guess that you are providing it with crappy data, and prevent
> you from screwing up your analysis. The same goes for NumPy code. The
> statistical formulas you type in Python have certain assumptions, and
> when they are violated the output is of no value. The more severe the
> violation, the less valuable is the output.
> 
>> The interesting task is probably this: to check for linear correlation but "weight clumping of data" somehow for the error estimation.
> 
> If you have a pathological data sample, then you need to specify your
> knowledge in greater detail. Can you e.g. formulate a reasonable
> stochastic model for your data, fit the model parameters using the
> data, and then derive the correlation analytically?

no, its too complex. Or its just: additional clumping/fractality in the data. 
Thus, linear correlation is supposed, but the x,y data distribution may have "less than 2 dimensions". No better model.

Think of such example: A drunken (x,y) 2D walker is supposed to walk along a diagonal, but he makes frequent and unpredictable pauses/slow motion. You get x,y coordinates in 1 per second. His speed and time pattern at all do not matter - you just want to know how well he keeps his track.
( My application data is even worse/blackbox, there is not even such "model"   )

> I am beginning to think your problem is ill defined because you lack a
> basic understanding of maths and statistics. For example, it seems you
> were confusing numerical error (rounding and truncation error) with
> statistical sampling error, you don't understand why standard errors
> decrease with sample size, you are testing with pathological data, you
> don't understand the difference between independent data and data
> duplications, etc. You really need to pick up a statistics textbook and
> do some reading, that's my advice.

I think I understand all this very well. Its not on this level. The problem has also nothing to do with rounding, sampling errors etc.
Of course the error ~1/sqrt(n) is the basic assumption - not what I not know, but what I "complain" about :-)   (Thus I even guessed the "dumb" formula for r_err well before I saw it somewhere. This is all not the real question.).
Yet I need a way to _NOT_ just fall on that ~1/sqrt(n) for the error, when there is unknown clumping in the data. It has to be a smarter - say automatic non-i.i.d. computation for a reasonable confidence intervall/error of the correlation - in absence of a final/total modell.

Thats not even an exceptional application. In most measured data which is created by iso-timestep sampling (thus not "pathological" so far?), the space of some interesting 2 variables may be walked "non-iso". Think of any time series data, where most of the data is "boring"/redundant because the flux of the experiment is so, that interesting things happen only occasionally. In absence of a full model for the "whole history", one could try to preprocess the x,y data by attaching a density weight in order to make it "non-pathological" before feeding it into the formula for r,r_err. Yet this is expensive. Or one could think of computing a rough fractal dimension and decorate the error like fracconst * (1-r**2)/sqrt(n)

The (fast) formula I'm looking for - possibly it doesn't exist - should do this in a rush.


Robert


From mail at razor.dk  Sun Nov  5 08:03:21 2006
From: mail at razor.dk (Christian Joergensen)
Date: Sun, 05 Nov 2006 14:03:21 +0100
Subject: Is there a commas-in-between idiom?
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <87irhugi5i.fsf@jamie.razor.dk>

Ernesto Garc?a Garc?a <titogarcia_nospamplease_ at gmail.com> writes:

> Hi experts,
>
> it's very common that I have a list and I want to print it with commas
> in between. How do I do this in an easy manner, whithout having the
> annoying comma in the end?

>>> list = [1,2,3,4,5,6]
>>> print ','.join(map(str, list))
1,2,3,4,5,6

-- 
Christian Joergensen | Linux, programming or web consultancy
http://www.razor.dk  |     Visit us at: http://www.gmta.info


From wuwei23 at gmail.com  Sun Nov  5 20:18:05 2006
From: wuwei23 at gmail.com (alex23)
Date: 5 Nov 2006 17:18:05 -0800
Subject: Is there a way to define a true global across modules?
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik>
	<eifus3$b9o$1@news.albasani.net>
	<mailman.1752.1162618751.11739.python-list@python.org>
Message-ID: <1162775885.601152.78080@e3g2000cwe.googlegroups.com>

Hendrik van Rooyen wrote:
> "robert" <no-spam at no-spam-no-spam.invalid> wrote:
> > Fredrik Lundh wrote:
> > > http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm

> > Or worse style - if you are too lazy to create a extra global variables module
> > (ab)use the __main__ module als "global":
> > import __main__
> > __main__.mysemphore += 1

> Thanks - how could you possibly have guessed that I am lazy - does it show that
> much?  *WEG*

You could merge the two approaches and bind a more explicit name to
__main__:

import __main__ as config

config.mysemaphore = 0

It's a little clearer what you're subverting __main__ for here :)

- alex23



From lycka at carmen.se  Fri Nov  3 08:29:50 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 03 Nov 2006 14:29:50 +0100
Subject: Python in sci/tech applications
In-Reply-To: <eiden1$sj0$1@news.albasani.net>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>
	<mailman.1678.1162491833.11739.python-list@python.org>
	<eiden1$sj0$1@news.albasani.net>
Message-ID: <eifg8f$96s$1@wake.carmen.se>

robert wrote:
> When one follows ..
> http://docs.python.org/inst/tweak-flags.html#SECTION000622000000000000000 
> http://www.zope.org/Members/als/tips/win32_mingw_modules
> 
> ..this seems only to cover the immediate python dll issues. What happens 
> with the C runtime libraries? You'll bind 2 different C-RTLs (DLLs) 
> etc.? And what happens for example with heap objects created with one 
> C-RTL and deleted/free'd with the other?

As far as I understand, there should be only one runtime library
involved. MinGW relies on the Microsoft runtime. It seems some
people have had problems using MSVCRT71 with MinGW, but I'm sure
that e.g. the Enthought people can explain those issues, since they
bundle MinGW in their Python 2.4 distribution.


From skip.montanaro at gmail.com  Thu Nov 16 11:09:03 2006
From: skip.montanaro at gmail.com (Skip Montanaro)
Date: Thu, 16 Nov 2006 10:09:03 -0600
Subject: atexit.register does not return the registered function. IMHO,
	it should.
In-Reply-To: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
References: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
Message-ID: <60bb7ceb0611160809j42cde231u2c55b41f784e589e@mail.gmail.com>

> Since that the decorator syntax is upon us, I think it would be good if
> atexit.register() was returning the function passed as argument.  This
> simple change to the library would solve a problem with the use of
> atexit.register as a decorator (and I can't think of any use case where
> this change would break any code).
...

Can you submit a bug report to the SourceForge bug tracker?  I'll take
care of the problem when I have access to the subversion repository.

Skip


From hg at nospam.com  Wed Nov 29 08:38:36 2006
From: hg at nospam.com (hg)
Date: Wed, 29 Nov 2006 07:38:36 -0600
Subject: pyxpcom
In-Reply-To: <mailman.816.1164752199.32031.python-list@python.org>
References: <QhHah.226$YX1.85@newsfe23.lga>	<mailman.809.1164736366.32031.python-list@python.org>	<cg%ah.268$Gf6.11@newsfe21.lga>
	<mailman.816.1164752199.32031.python-list@python.org>
Message-ID: <sbgbh.3034$YX1.1371@newsfe23.lga>

Trent Mick wrote:
>> My need is as follows: I have developed an activex component to access a
>> smart card on the client side / do some web site logon.
>>
>> Are xpcom / pyxpcom advanced/stable enough for such an implementation
>> under Linux / Windows ?
> 
> You mean to provide the equivalent functionality for Firefox that your
> activex component does for IE? Yes, xpcom and pyxpcom are quite stable,
> however putting together a Firefox extension that gets PyXPCOM itself up
> and running in a client's Firefox install will be quite challenging.
> 
> Trent
> 
Exactly ... are you saying I need to distribute Firefox compiled
differently in order to achieve that ?

This is less a python issue clearly if that is the case: would I have
the same issues to resolve if I were to write the module in C++ ?

Thanks,

hg


From mary.boholst at iop.kcl.ac.uk  Tue Nov 14 10:35:16 2006
From: mary.boholst at iop.kcl.ac.uk (Mary Jane Boholst)
Date: Tue, 14 Nov 2006 15:35:16 +0000
Subject: another newbie question
Message-ID: <4559E234.7060309@iop.kcl.ac.uk>

Hello everyone,
I have a question that google couldnt answer for me and thought that the
brains on here might be able to help.
I am trying to upload a file to a database using a (cgi) form and am
having trouble doing this. I think that I need some way of escaping the
file contents or making it so that mysql/python (not sure which) will
ignore the files actual contents and store it in the db regardless of
what is actually in the file.
I hope that made sense.
Thanks in advance for any help.
Regards,
MJ


From ptmcg at austin.rr._bogus_.com  Sun Nov 19 21:59:53 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 20 Nov 2006 02:59:53 GMT
Subject: Not enough arguments for format string
References: <1163991320.262638.154950@j44g2000cwa.googlegroups.com>
Message-ID: <JS88h.891$Gk5.841@tornado.texas.rr.com>

Change:

"""%row['keywords'],row['quotation'],row['citation'],row['zid']

to

""" % (row['keywords'],row['quotation'],row['citation'],row['zid'])

-- Paul 




From grebekel at gmail.com  Thu Nov 23 10:38:20 2006
From: grebekel at gmail.com (grebekel at gmail.com)
Date: 23 Nov 2006 07:38:20 -0800
Subject: select() on WinXP
Message-ID: <1164296300.268074.250230@j44g2000cwa.googlegroups.com>

I'm running Python 2.5 on Windows XP. When I try to do this:

[code]
import select
select.select([], [], [])
[/code]

I get this:

[output]
Traceback (most recent call last):
  File "C:/Documents and Settings/Grebekel/Desktop/s.py", line 2, in
<module>
    select.select([],[],[])
error: (10022, 'An invalid argument was supplied')
[/output]

Is there anything I should be aware of to get select() working under
Windows?



From jm.suresh at gmail.com  Mon Nov 20 04:42:22 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 20 Nov 2006 01:42:22 -0800
Subject: to ask an container instance to suicide
Message-ID: <1164015742.696913.283050@m73g2000cwd.googlegroups.com>

Hi,
 I have containers to hold geometrical objects. The members in these
containers can again be containers them self. Now, In the program I
would be moving objects from one container to another. In this process,
If the number of members in one of the containers becomes just one, I
want to delete that container and have only its only member in place of
it in the parent container.
 I have implemented setting and getting the container members using
property().

Right now, I am planning to do this this way:
 Maintain a reference to parent container in each container.
 When the condition is detected, do self.parent.deleteObject(self) .

def deleteObject(self,memberId):
   index = self._members.index(memberId)
   self._members[index] = memberId._members[0]
   del memberId

Will this work. Or is there any other simple way to do this?
--
Suresh



From no at spam.it  Tue Nov 28 14:49:53 2006
From: no at spam.it (Danny Scaleno)
Date: Tue, 28 Nov 2006 20:49:53 +0100
Subject: IEC Controller and <head> element
Message-ID: <456c92a1$0$3215$4fafbaef@reader2.news.tin.it>

Hello,

using IEC Controller,
anybody knows how to capture the head part of an html page like this one?

<html>
<head>
<script language='javascript'>
	Object=window.open('test.html','test1','name="test1"');
	Object.focus()
</script>
<head>
<body></body>
</html>

it seems IEC is able to capture only the <body> part.
I need to parse the string inside the tag <script>

Actually, IEC return the ie.Document object, but
how do I know which methods and properties are available for it ?


Thank you
Danny


From tgrav at mac.com  Sun Nov 26 08:42:07 2006
From: tgrav at mac.com (Tommy Grav)
Date: Sun, 26 Nov 2006 08:42:07 -0500
Subject: Installation problem
Message-ID: <42A28409-E975-4C8F-B85A-30F06390687D@mac.com>

Trying to update my ActivePython installation I mistakenly downloaded
the Intel Mac version (rather than the PPC version) and tried to  
install it.
The version did install but did not run of course. However, now trying
to install the PPC version of Activepython or even the 2.5 version of
macpython fails (actually macpython installs, but the installation  
program
tells me there is an error at the end). Anyone know how to completely
remove all previous python installations and all config files so that  
I can
install it from scratch? Is there also a log of the dmg-installation  
so that
I can see what fails with the installation?

Cheers
   Tommy


From mail at microcorp.co.za  Thu Nov 16 01:11:53 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 16 Nov 2006 08:11:53 +0200
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper><mailman.2125.1163295096.11739.python-list@python.org><pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au><1163322853.760315.51040@k70g2000cwa.googlegroups.com>
	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
Message-ID: <017d01c7094b$86032a20$03000080@hendrik>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote:

> John Machin wrote:
>
> > Here in Austraila, (I expect this is common to most countries), there
> > are people who are utterly clueless about elementary data model rules,
> > like identification "numbers" should be kept as strings.
>
> Do you mean that ID numbers that serve as a primary key in a database
> should also be strings?

Nothing wrong with doing that - its not as if you are going to arithmetic with
them -
adding my id to yours is generally not very useful...

- Hendrik



From vatamane at gmail.com  Sun Nov 19 05:31:26 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 19 Nov 2006 02:31:26 -0800
Subject: Why isn't SPLIT splitting my strings
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
Message-ID: <1163932286.420652.100100@f16g2000cwb.googlegroups.com>

The regular string split does not take a _class_ of characters as the
separator, it only takes one separator. Your example suggests that you
expect that _any_ of the characters "; ()[]" could be a separator.
If you want to use a regular expression as a list of separators, then
you need to use the split function from the regular expression module
(re):
http://docs.python.org/lib/node46.html

Hope this helps,
Nick V.


ronrsr wrote:
> I'm trying to break up the result tuple into keyword phrases.  The
> keyword phrases are separated by a ;  -- the split function is not
> working the way I believe it should be. Can anyone see what I"m doing
> wrong?
>
> bests,
>
> -rsr-
>
>
>
>  print "newstring =", str(result[i][0])
>         print "just split", str(result[i][0]).split('; ()[]"')
>         zd.append(str(result[i][0]).split('; ()[]"'))
>
>
> result= (('Agricultural subsidies; Foreign aid',), ('Agriculture;
> Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
> Childhood Development, Birth Defects; Toxic Chemicals',),
> ('Antibiotics, Animals',), ('Agricultural Subsidies, Global Trade',),
> ('Agricultural Subsidies',), ('Biodiversity',), ('Citizen Activism',),
> ('Community Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture,
> Cotton',), ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
> ('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
> Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
> Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
> ('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
> Childhood Development, Birth Defects',), ('Corporate Reform,
> Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
> (Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
> Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
> ('Democracy, Corporate
>
>
>
> partial results:
>
> string a =  Agricultural subsidies; Foreign aid
> newstring = Agricultural subsidies; Foreign aid
> just split ['Agricultural subsidies; Foreign aid']
> newstring = Agriculture; Sustainable Agriculture - Support; Organic
> Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> Toxic Chemicals
> just split ['Agriculture; Sustainable Agriculture - Support; Organic
> Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> Toxic Chemicals']
> newstring = Antibiotics, Animals
> just split ['Antibiotics, Animals']



From rtw at freenet.co.uk  Wed Nov  1 14:49:28 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 13:49:28 -0600
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
	<Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>
	<KN42h.561$Qn2.495@tornado.texas.rr.com>
Message-ID: <Xns986EC9B236E30rtwfreenetREMOVEcouk@216.196.109.145>

Paul McGuire wrote in news:KN42h.561$Qn2.495 at tornado.texas.rr.com in
comp.lang.python: 

>>> opAssoc = Constants(object)
>>> opAssoc.RIGHT = 0
>>> opAssoc.LEFT = 1

>> This is nice, but you can cut down on some of the cruft:

>> Constants.LEFT = 1

> One man's cruft is another man's clarity.  

:-)

> The reason I used instances
> instead of just the Constants class was so that I could define a
> little more descriptive context for the constants, 

Sorry I don't know what you mean here, could I have an example ?

> rather than simply
> a shortcut for importing lots and lots of constant definitions.  I
> expect I will want to define some more constants for other parts of
> pyparsing, and the instance scoping helps organize them, that's all.

Again I'm struggling to see how using an instance is any different from
just using the class ?

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From rridge at csclub.uwaterloo.ca  Sat Nov  4 19:52:55 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 4 Nov 2006 16:52:55 -0800
Subject: Trouble compiling win32all on Windows
References: <eiih1o$1jd$1@news.albasani.net>
Message-ID: <1162687975.665327.107030@m7g2000cwm.googlegroups.com>

robert wrote:
> I've trouble compiling win32all. VC98 and latest SDK installed
> (otherwise with original SDK it won't even compile).
> It tells that uuid.lib(cguid_i.obj) : fatal error LNK1103: debug info
> is destroyed.

The library isn't compatable with the compiler you're using.  You'll
need to use an older version of the Platform SDK that supports your
compiler.

                                 Ross Ridge



From carsten at uniqsys.com  Mon Nov 13 12:53:10 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Nov 2006 12:53:10 -0500
Subject: jython's future (was: Python development time is faster.)
In-Reply-To: <4558ACAC.1030001@web.de>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>
	<4rrjenFspqicU2@mid.uni-berlin.de>  <4558ACAC.1030001@web.de>
Message-ID: <1163440390.3434.45.camel@dot.uniqsys.com>

On Mon, 2006-11-13 at 18:34 +0100, Stefan Behnel wrote:
> Honestly, how many important Python modules do still run on 2.2?

InformixDB still compiles on 2.2 except when I accidentally temporarily
break backwards compatibility.

Of course it's a matter of opinion whether it qualifies as an important
module. ;-)

-Carsten




From tejovathi.p at gmail.com  Wed Nov  1 23:28:51 2006
From: tejovathi.p at gmail.com (Teja)
Date: 1 Nov 2006 20:28:51 -0800
Subject: Regular Expression for a string
In-Reply-To: <fee2h.38$Mw.8@newssvr11.news.prodigy.com>
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
	<fee2h.38$Mw.8@newssvr11.news.prodigy.com>
Message-ID: <1162441731.257435.263870@i42g2000cwa.googlegroups.com>


James Stroud wrote:

> Teja wrote:
> > HI all,
> >
> > I need to write a regular experssion for a string which satisfies the
> > following a criteria :
> >
> > 1) it should start with an alphabet
> > 2) it can contain alphabets/digits/_ from second character
> > 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional
> >
> >  can any one please help me out.... pls....
> >
> >
> > Teja.P
> >
>
> This is as general as could be constructed given your vague requirements:
>
> "[a-zA-Z][a-zA-Z0-9_]+"
>
> You may need to provide examples.
>
> James
>
>
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/

Thnks James for ur quick reply.....
Here is what I want actually

Some examples

string1
string_1
string1[0]
string_1_str[a]
STRING_1_[2]
STRING_1_str[a][1][2]

etc
etc

I need a regular expression for such strings



From antroy at gmail.com  Wed Nov  8 07:40:44 2006
From: antroy at gmail.com (Ant)
Date: 8 Nov 2006 04:40:44 -0800
Subject: Need help
In-Reply-To: <1162986802.818675.5510@h48g2000cwc.googlegroups.com>
References: <1162986802.818675.5510@h48g2000cwc.googlegroups.com>
Message-ID: <1162989644.079168.290180@m7g2000cwm.googlegroups.com>


Srinivasa wrote:
> Hai friends,
> I wrote a programme to display a window (ui) using Python. I renamed it
> as .pyw to avoid popping-up the dos window while running it. It worked
> fine. But when i converted  it to executable file using py2exe; the dos
> window appears. Can anybody tell me what the solution is.

Would be easier to give you a proper example if you posted some code,
esp the setup.py script. I'm guessing though that you are using  the
'console' option to the setup function in your script rather than the
'windows' option.

See help(py2exe) in the python console for more information.



From Thomas.Ploch at gmx.net  Thu Nov 30 06:23:20 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 12:23:20 +0100
Subject: SPE refuses.
In-Reply-To: <1164882842.357607.75440@16g2000cwy.googlegroups.com>
References: <mailman.846.1164826327.32031.python-list@python.org>	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>	<mailman.857.1164838885.32031.python-list@python.org>	<1164842145.465496.135210@h54g2000cwb.googlegroups.com>	<mailman.875.1164880214.32031.python-list@python.org>
	<1164882842.357607.75440@16g2000cwy.googlegroups.com>
Message-ID: <456EBF28.7040808@gmx.net>

SPE - Stani's Python Editor schrieb:
> On 30 nov, 10:50, egbert <egbert.bouw... at hccnet.nl> wrote:
>> On Wed, Nov 29, 2006 at 03:15:45PM -0800, SPE - Stani's Python Editor wrote:> Do you have python-wxversion installed?
>>
>>> $sudo apt-get install python-wxversionThat helped. But why isn't it included in the wxPython download ?
> I was surprised as well. I filed a bug report at debian MOTU that spe
> depends as well on python-wxversion, so that it is automatically
> installed together with spe in the future.
> 
>> Anyway, the first screen looks great. I will explore spe.
>> Thanks.
> You're welcome!
> 
> Stani
> 

ell, when reading these posts about SPE, I wanted to try it as well. I
am running the newest version of wxpython with python2.4. I installed
it, all went fine with the setup.py script.

When I tried to open the program, a window appears for about a second,
displaying a traceback.

So I ran the SPE.py debug tool as you have recommended earlier.

here's the output:

Spe is running in debugging mode with this configuration:
- platform  : darwin
- python    : 2.4.4
- wxPython  : 2.7.1.3.
- interface : <default>
- encoding  : mac-roman

Launching application...
Create: Framework: menu.
Create: Framework: toolbar.
Create: Framework: statusbar.
Traceback (most recent call last):
  File "SPE.py", line 209, in ?
    style           = style)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 1278, in __init__
    wx.App.__init__(self,redirect=not debug)
  File
"//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/_core.py",
line 7480, in __init__
    self._BootstrapApp()
  File
"//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/_core.py",
line 7080, in _BootstrapApp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 1297, in OnInit
    style   = self.style,
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 801, in __init__
    Parent.__init__(self,app=app,page=page,**options)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 595, in __init__
    parentFrame     = self,
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 325, in __init__
    self.__statusBar__()
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
line 417, in __statusBar__
    self.statusBar = self.app.StatusBar(parent=self,id=wx.ID_ANY)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
line 727, in __init__
    self.throbber   = Throbber(self,'throbber_still.gif')
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
line 733, in __init__
    GIFAnimationCtrl.__init__(self,statusBar,-1,info.imageFile(fileName))
  File
"//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/animate.py",
line 242, in __init__
    self.LoadFile(filename)
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
line 746, in LoadFile
    if fileName != self._fileName and not self._running:
AttributeError: 'Throbber' object has no attribute '_fileName'


Thanks for any help.
Thomas



From __peter__ at web.de  Tue Nov 14 15:17:33 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 21:17:33 +0100
Subject: multi split function taking delimiter list
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
Message-ID: <ejd886$nu1$02$1@news.t-online.com>

martinskou at gmail.com wrote:

> Hi, I'm looking for something like:
> 
> multi_split( 'a:=b+c' , [':=','+'] )
> 
> returning:
> ['a', ':=', 'b', '+', 'c']
> 
> whats the python way to achieve this, preferably without regexp?

I think in this case the regexp approach is the simplest, though:

>>> def multi_split(text, splitters):
...     return re.split("(%s)" % "|".join(re.escape(splitter) for splitter
in splitters), text)
...
>>> multi_split("a:=b+c", [":=", "+"])
['a', ':=', 'b', '+', 'c']

Peter


From kibleur.christophe at gmail.com  Fri Nov 10 02:48:56 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 9 Nov 2006 23:48:56 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1163109685.982156.272530@e3g2000cwe.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
	<1162831146.195927.296110@e3g2000cwe.googlegroups.com>
	<1163086763.536524.37710@h48g2000cwc.googlegroups.com>
	<1163088412.025310.185250@m7g2000cwm.googlegroups.com>
	<1163106737.776663.18800@h54g2000cwb.googlegroups.com>
	<1163109685.982156.272530@e3g2000cwe.googlegroups.com>
Message-ID: <1163144936.292526.7240@f16g2000cwb.googlegroups.com>

Shame on me, I forgot to import the lexers.



From Leo.Kislov at gmail.com  Fri Nov 24 07:59:56 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 24 Nov 2006 04:59:56 -0800
Subject: Email headers and non-ASCII characters
References: <mailman.639.1164291163.32031.python-list@python.org>
Message-ID: <1164373196.508435.155010@k70g2000cwa.googlegroups.com>


Christoph Haas wrote:
> Hello, everyone...
>
> I'm trying to send an email to people with non-ASCII characters in their
> names. A recpient's address may look like:
>
> "J?rg N?rgens" <joerg at nowhere>
>
> My example code:
>
> =================================
> def sendmail(sender, recipient, body, subject):
>    message = MIMEText(body)
>    message['Subject'] = Header(subject, 'iso-8859-1')
>    message['From'] = Header(sender, 'iso-8859-1')
>    message['To'] = Header(recipient, 'iso-8859-1')
>
>    s = smtplib.SMTP()
>    s.connect()
>    s.sendmail(sender, recipient, message.as_string())
>    s.close()
> =================================
>
> However the Header() method encodes the whole expression in ISO-8859-1:
>
> =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?=
>
> However I had expected something like:
>
> "=?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?=" <joerg at nowhere>
>
> Of course my mail transfer agent is not happy with the first string
> although I see that Header() is just doing its job. I'm looking for a way
> though to encode just the non-ASCII parts like any mail client does. Does
> anyone have a recipe on how to do that? Or is there a method in
> the "email" module of the standard library that does what I need? Or
> should I split by regular expression to extract the email address
> beforehand? Or a list comprehension to just look for non-ASCII character
> and Header() them? Sounds dirty.

Why dirty?

from email.Header import Header
from itertools import groupby
h = Header()
addr = u'"J?rg N?rgens" <joerg at nowhere>'
def is_ascii(char):
    return ord(char) < 128
for ascii, group in groupby(addr, is_ascii):
    h.append(''.join(group),"latin-1")

print h
=>
"J =?iso-8859-1?q?=F6?= rg N =?iso-8859-1?q?=F8?= rgens"
<joerg at nowhere>

  -- Leo



From copiernik at wp.pl  Fri Nov 10 10:01:02 2006
From: copiernik at wp.pl (consternation)
Date: Fri, 10 Nov 2006 16:01:02 +0100
Subject: newbee  I have an object how to check what's his class?
Message-ID: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>

I can't find  neither in tutorial nor with google It's all about 
isinstance,  or  __class__.
How to test that an object is an instance of my X class??
Do I have this problems because I stre my objects in a dict?

I wrote a class X like this :
class X(object):

     def __init__(self,name):
       self.name=name
       self.val=[]
       self.description ="class X contains : "

def __repr__(self):
         for i in range(len(self.val)):
            description+=i
             return self.description


In class Y I create my X objects and put them into a dict

  print "\nTEST"
.for (i,v) in self.mem.items():
      print v

The objects are printed out the way I specified in  __repr__, so I know it's 
an object of X class.
No I want to put in the dict some other objects of class Z,K....
When I get the value fom dict I have to distinguish them somehow to handle 
them latr in programm.
I thouth about isinstanceof  - it doesn't work. I did some tests, but I 
don't understand the answers:
Why python claims it's a list, but still print's it like X class
#in Y class:
print isinstance(v,X)                      False
print v.__class__.__name__         list


And adding print in  X class i see
 def __repr__(self):
    print self.__class__            -->        [__main__.Complex

Could someone explain this to me?
thank you




From kelong_2000 at yahoo.com  Wed Nov  1 12:33:48 2006
From: kelong_2000 at yahoo.com (Kenneth Long)
Date: Wed, 1 Nov 2006 09:33:48 -0800 (PST)
Subject: 3d programming without opengl
In-Reply-To: <12khhro1hph7q38@corp.supernews.com>
Message-ID: <20061101173348.63692.qmail@web51108.mail.yahoo.com>

you might find this interesting...

www.ogre3d.org/

and its python wrapper

http://www.ogre3d.org/wiki/index.php/PyOgre


With /without Hardware acceleration...
with /without OpenGL or DirectX...





hello


 
____________________________________________________________________________________
Get your email and see which of your friends are online - Right on the New Yahoo.com 
(http://www.yahoo.com/preview) 



From paddy3118 at netscape.net  Fri Nov  3 01:51:08 2006
From: paddy3118 at netscape.net (Paddy)
Date: 2 Nov 2006 22:51:08 -0800
Subject: Best way to have intermediate object description format
In-Reply-To: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
References: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
Message-ID: <1162536668.321600.171650@h48g2000cwc.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Hi,
>  Is there any standard text format for storing data of object oriented
> nature.
>  The text file should be readable.
>
> That is, Is there any better way than having to write out a file like
> this from the original place and read it in python and process it.
>
> #----------------------------
> world = World(name='MyWorld')
> world.objects.append(Box(color='red'))
> world.objects.append(Circle(color='green'))
> world.someProp = "123"
> #-----------------------------
>
> Thanks.
> Suresh

XML ?
YAML ?
JSON ?
ConfigParser module ?
CSV file ?
UML ?

I'm finding it hard to be more specific, given your original post. so
just squirted some data formats that are supported by multiple
languages and can be used to transfer data between them.

P.S. I don't know why I put XML first :-)
P.P.S. And UML seems to be about pretty diagrams rather than a textual
format, but no doubt, with the size of the companies behind it, there's
probably a textual format hidden in their too.


- Paddy.



From mailpitches at email.com  Tue Nov  7 15:10:01 2006
From: mailpitches at email.com (mp)
Date: 7 Nov 2006 12:10:01 -0800
Subject: Character encoding
In-Reply-To: <1162928387.620610.31290@h48g2000cwc.googlegroups.com>
References: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
	<1162928387.620610.31290@h48g2000cwc.googlegroups.com>
Message-ID: <1162930201.211625.77050@m73g2000cwd.googlegroups.com>

I'd prefer a more generalized solution which takes care of all possible
ampersand characters. I assume that there is code already written which
does this.

Thanks

i80and wrote:
> I would suggest using string.replace.  Simply replace '&nbsp' with ' '
> for each time it occurs.  It doesn't take too much code.
>
> On Nov 7, 1:34 pm, "mp" <mailpitc... at email.com> wrote:
> > I have html document titles with characters like &gt;, &nbsp;, and
> > &#135. How do I decode a string with these values in Python?
> > 
> > Thanks



From fredrik at dolda2000.com  Wed Nov 15 22:02:58 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Thu, 16 Nov 2006 04:02:58 +0100
Subject: Secure Python
Message-ID: <1163646179.11586.60.camel@pc7.dolda2000.com>

Hi List!

I was thinking about secure Python code execution, and I'd really
appreciate some comments from those who know Python better than I do.

I was thinking that maybe it could be possible to load and run untrusted
Python code, simply by loading it in a module with a modified version of
__builtins__. Without any reachable function that do unsafe operations,
code running from there shouldn't be able to do evil things.

Or? What would happen to `import'? Would it be possible to set a null
import path for a specific module. Are there any other ways to reach
modules/functions that would make this impossible (I don't seem to be
able to remember, but aren't there cross-references somewhere to the
defining modules of data passed to the code in the secure module)?

If this doesn't work, might there be some other way to run untrusted
code that I haven't thought of (apart from using O/S-specific stuff like
SECCOMD, of course).

Thank you very much for your time!

Fredrik Tolf




From bblais at bryant.edu  Fri Nov 17 13:51:02 2006
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 17 Nov 2006 13:51:02 -0500
Subject: About alternatives to Matlab
In-Reply-To: <1163720268.611923.3180@e3g2000cwe.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
Message-ID: <455E0496.4020703@bryant.edu>

Matimus wrote:
>  Boris wrote:
>  > Hi, is there any alternative software for Matlab? Although Matlab is
>  > powerful & popular among mathematical & engineering guys, it still
>  > costs too much & not publicly open. So I wonder if there's similar
>  > software/lang that is open & with comparable functionality, at least
>  > for numerical aspect. Thanks!
> 
> There is also Scilab. 
> If anybody knows the reason I'd be happy to hear it.

I feel like I need to respond on this thread, as a recent Matlab/Octave/Scilab to
Python convert.  I'm cross-posting this to the scipy list, because there was a recent
thread about advantages to Python over Matlab.

Bottom line:  Python is more than a replacement for Matlab, in almost every capacity. 
  There are a couple of places here and there where I feel Matlab still has an 
advantage, but since I converted about 12 months ago, I have run Matlab only a couple 
of times, and only to send something to someone who didn't have Python installed.

I've been using Matlab for more than 10 years, in every part of my research and 
teaching.  When I started to teach courses with a larger Matlab component, I looked 
for free/cheap alternatives that the students could use on their own machines.  There 
was the student version of Matlab, which was crippled in ways unacceptable to me.

Octave was good, and I used it a couple of years, but the MS Windows port is pretty 
horrible.  I still use it some on Linux, but on Windows it requires Cygwin to be 
installed, and performance takes a *huge* hit with the compiled extensions in 
Windows.  The community is pretty amazing, and the main author John Eaton is nothing 
short of incredible (I've personally received bug fix responses within minutes of 
submitting the bug report!).  Writing C++ extensions is also pretty easy in Octave, 
and I made a lot of use of that.  The graphics uses a connection to Gnuplot, which is 
ok.

I used Scilab for a short while.  It did install more cleanly in Windows, and the 
performance was generally better than Octave.  I didn't like how some things were not 
Matlab compatible for no good reason.  I got the feeling from the community that it 
wasn't as open, and that decisions were somewhat arbitrary.  GUI syntax was weird, 
and compiling extensions was a real pain, requiring more than one file per function.

I was introduced to python about 12 months ago, and haven't looked back since.  :)
I want to state some of the hurdles that I felt in the transition, in the hope that 
it will help others to overcome them.  The advantages to Python far outweigh the 
problems that I had.

1) in Matlab, you can call a function without any execfile() or import statements. 
This impacts Python negatively in the ease of using it interactively.  On the other 
hand, the one-function per file organization of Matlab can get a little hard to follow.

2) following up on point 1), this has an effect on matplotlib more drastically. 
Turning it to interactive mode (ion()) helps, but in Linux I get window refresh 
issues with this mode.  Switching to ipython for the shell, making sure to call it 
with ipython -pylab, has been a big help in this regard.

3) 3D plotting requires yet-another library.  luckily I haven't had to use this much, 
but I hope that someday that it will be part of matplotlib.

4) GUI development is a bit easier in Matlab for small projects, and harder for 
larger ones.  I like using wax in python, which wraps wxPython.  Others swear by 
Dabo, but I always get two windows popping up when I run even the hello world daboui 
program.  At any rate, wxPython looks much better on Windows than the same interface 
in Matlab, and it is more robust across operating systems.

5) although stated in the python docs that python is easy to interface with C, and in 
the scipy docs that it is easier to interface to C than Matlab, I cannot agree. 
perhaps it is my limitation, but I found that the API was more complicated (because 
of the multiple data structures), and having to keep track of references was 
something I never had to do in writing Matlab extensions.   HOWEVER, once I found 
Pyrex, all of that changed.  Pyrex is simply the best way to write an extension that 
I have ever seen, and I have never seen its equal for any other language.


So my recommendation for a (nearly) complete Matlab replacement would be:
	python
	numpy
	scipy
	matplotlib
	pyrex

There is a bit of a learning curve, but it is well worth it.  On an amusing note, if 
you work in Python for a while, and go back to Matlab for a bit, you will find that 
you will forget your semi-colons at the ends of the Matlab lines, and all of your 
arrays will display and scroll like crazy on your screen.  :)



		thanks all for making such a great set of tools!


				Brian Blais

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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais




From gagsl-py at yahoo.com.ar  Tue Nov 21 13:38:29 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 15:38:29 -0300
Subject: Python development time is faster.
In-Reply-To: <slrnem62og.1b4.horpner@FIAD06.norwich.edu>
References: <1A4BF05172023E468CB6E867923BC90402B6E37D@accmail2.sunbelt.org>
	<mailman.522.1164068972.32031.python-list@python.org>
	<slrnem62og.1b4.horpner@FIAD06.norwich.edu>
Message-ID: <7.0.1.0.0.20061121153042.03f1e088@yahoo.com.ar>

At Tuesday 21/11/2006 11:18, Neil Cerutti wrote:

>On 2006-11-21, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> > And loop invariants are good comments sometimes.
>
>They are even better as code, though not always practical that
>way.

That's why I say "sometimes"...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From amitsoni.1984 at gmail.com  Tue Nov 21 18:33:53 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 21 Nov 2006 15:33:53 -0800
Subject: Quadratic Optimization Problem
Message-ID: <1164152033.306124.126290@e3g2000cwe.googlegroups.com>

Hi,

I need to do a quadratic optimization problem in python where the
constraints are quadratic and objective function is linear.

What are the possible choices to do this.

Thanks
Amit



From fredrik at pythonware.com  Sun Nov 12 20:17:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 02:17:24 +0100
Subject: Python 3000 idea -- + on iterables -> itertools.chain
In-Reply-To: <slrnelfg32.6d3.jtr@ofb.net>
References: <slrnelfg32.6d3.jtr@ofb.net>
Message-ID: <ej8h31$a7f$1@sea.gmane.org>

John Reese wrote:

> It seems like it would be clear and mostly backwards compatible if the
> + operator on any iterables created a new iterable that iterated
> throught first its left operand and then its right, in the style of
> itertools.chain. 

you do know that "iterable" is an informal interface, right?  to what 
class would you add this operation?

</F>



From steve at holdenweb.com  Thu Nov  2 11:11:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 16:11:59 +0000
Subject: Help on writing P2P Streaming client
In-Reply-To: <1162483421.631558.178780@e3g2000cwe.googlegroups.com>
References: <1162483421.631558.178780@e3g2000cwe.googlegroups.com>
Message-ID: <eid5aa$oc1$1@sea.gmane.org>

Daniel wrote:
> I want to write a P2P streaming client where ine user broadcasts and
> many users receive the streaming content and forward like BitTorrent.
> 
> Can anybody provide pointers for starting in Python. I have done couple
> of small projects in Python but I need to get this done.
> 
> Every help is appreciated.
> 
I take it you know BitTorrent is written in Python?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From arkanes at gmail.com  Wed Nov 29 15:26:15 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 29 Nov 2006 14:26:15 -0600
Subject: type(foo) == function ?
In-Reply-To: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
References: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
Message-ID: <4866bea60611291226m4be5965bg85879ece84eea96c@mail.gmail.com>

On 11/29/06, Tom Plunket <tomas at fancy.org> wrote:
> I'd like to figure out if a given parameter is a function or not.
>
> E.g.
>
> >>> type(1)
> <type 'int'>
> >>> type(1) == int
> True
>
> implies:
>
> >>> def foo():
> ...   pass
> ...
> >>> type(foo)
> <type 'function'>
> >>> type(foo) == function
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'function' is not defined
>
> Is there a way I can know if 'foo' is a function?
>

>>> def foo():
...     pass
...
>>> from inspect import isfunction
>>> isfunction(foo)
True
>>>


But you probably want the callable() builtin instead.

> thanks,
> -tom!
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From allison.william at gmail.com  Wed Nov  8 18:22:27 2006
From: allison.william at gmail.com (William Allison)
Date: Wed, 08 Nov 2006 18:22:27 -0500
Subject: Barry Warsaw giving Python talk at NASA
In-Reply-To: <_O6dnUlIw7lwAs3YnZ2dnUVZ_q-dnZ2d@speakeasy.net>
References: <_O6dnUlIw7lwAs3YnZ2dnUVZ_q-dnZ2d@speakeasy.net>
Message-ID: <EbydnQWb4oAu-8_YnZ2dnUVZ_oCdnZ2d@comcast.com>

A.M. Kuchling wrote:
> This is at the Goddard campus:
> <http://isandtcolloq.gsfc.nasa.gov/fall2006/speaker/warsaw.html>
> 
> --amk
Thanks for the heads up on this.  I managed to get escorted in to see 
it.  Thought it was quite good.  I was also informed that the webcast 
will be made available to the public.


From uche.ogbuji at gmail.com  Sun Nov 19 09:11:14 2006
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: 19 Nov 2006 06:11:14 -0800
Subject: lxml/ElementTree and .tail
In-Reply-To: <0wD7h.77$_H5.56@tornado.texas.rr.com>
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
	<mailman.251.1163679925.32031.python-list@python.org>
	<mailman.408.1163844581.32031.python-list@python.org>
	<mailman.412.1163853827.32031.python-list@python.org>
	<0wD7h.77$_H5.56@tornado.texas.rr.com>
Message-ID: <1163945474.011407.218600@m7g2000cwm.googlegroups.com>

Paul McGuire wrote:
> Thankfully, I'm largely on the periphery of that universe (except for being
> a sometimes victim).  But it is certainly frustrating to see many of the OMG
> concepts of the 90's reimplemented in Java services, and then again in
> XML/SOAP, with no detectable awareness that these messaging and
> serialization problems have been considered before, and much more
> thoroughly.

You'll be surprised at how many XMLers agree that Web services are a
pretty inept reinvention of CORBA.  I was pretty much slain by this
take:

http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple

I think Duncan Grisby of OmniORB put it most succintly when he pointed
out that SOAP and friends are more complex, more bloated, and less
interoprable than CORBA ever was.  But they use XML so they get the
teacher's pet treatment.


> I liked XML when I could read it and hack it out in Notepad.

You still can, and don't let anyone tell you otherwise.  I've always
argued that XML doesn't work unless it's Notepad-hackable.  I do
usually allow an exception for SVG.

> I like
> attributes, which puts me on the outs with most XML zealots who forswear the
> use of attributes on purely academic grounds (they defeat the future
> possible expansion of an attribute's value into more complex substructure).

Really?  Do you have any references for this?  I haven't seen much
criticism of attributes since the very early days, and almost all XML
technologies make heavy use of attributes.  Here's my take:

http://www.ibm.com/developerworks/xml/library/x-eleatt.html

As you can see, elements and attributes get equal billing.

> I dislike namespaces, especially the default xmlns kind, as they make me
> take extra steps when retrieving nodes via Xpaths; and everyone seems to
> think their application needs namespaces, when there is no threat that these
> tags will ever get mixed up with anyone else's.

Namespaces are possibly the worst thing to have ever happened to XML.
Again, my take:

http://www.ibm.com/developerworks/xml/library/x-namcar.html

And yes, default namespaces are about 50% of the problem with
namespace.  QNames in content (which are of course an abuse of
namespaces) are almost all of the other 50%.  I call them "hidden
namespaces":

http://copia.ogbuji.net/blog/2006-08-14/Some_thoug

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From __peter__ at web.de  Tue Nov 28 03:49:23 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 09:49:23 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
Message-ID: <ekgt57$31p$00$1@news.t-online.com>

HYRY wrote:

> I want to join two mono wave file to a stereo wave file by only using
> the default python module.
> Here is my program, but it is much slower than the C version, so how
> can I increase the speed?
> I think the problem is at line #1, #2, #3.

> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1

ITEMSIZE = 2
size = ITEMSIZE*(len(larray) + len(rarray))
oarray = array.array("h").fromstring("\0" * size)

may be a bit faster.

Peter


From chad.schroeder at lodgenet.com  Thu Nov 16 11:20:14 2006
From: chad.schroeder at lodgenet.com (Chad J. Schroeder)
Date: Thu, 16 Nov 2006 10:20:14 -0600
Subject: Threads and signals
References: <pJ-dnYyz7q_sAsbYnZ2dnUVZ_sidnZ2d@midco.net>
Message-ID: <3PudnV7CocJcEsHYnZ2dnUVZ_h6dnZ2d@midco.net>

By writing a little C module I fixed the problem.  By simply calling
the function in the child thrd's run method, things work as expected.

This is all the function (blockall) does:

    sigset_t   omask, nmask;
    sigfillset(&nmask);
    sigprocmask(SIG_SETMASK, &nmask, NULL);

bash-2.05b# python2.5 ./thrd_test.py
Starting up
MainThread.run():  71799
ChildThread.run():  71799
ChildThread before sleep(10)
MainThread before sleep(15)
^CReceived signal  2
flag:  True
flag:  False
MainThread after sleep(15)
Shutting down
bash-2.05b#

Chad

> I've run into an "opportunity" in a Python application using threads
> and signals.  Basically, there is a main process that spawns off a child 
> thread that loops forever.  In between iterations, the child
> thread sleeps for X seconds. All the while, the main thread loops
> forever doing its thing and also sleeps in between iterations (see the code at 
> the end this message). Normally the application would
> be daemonized before the main process starts up. Hence, during a
> system shutdown or stoppage of the daemon, it's desired that the
> daemon catch a few signals (TERM/INT) and perform a few cleanup
> routines. According to the Python docs, only the main thread will receive 
> signals. The problem I have, on FreeBSD systems, is that the sleep
> function in the child gets interrupted and the signal never gets handled
> until the main thread's sleep concludes.  It works as expected on a Linux
> box (main thrd's sleep is interrupted).  Sample output from multiple systems 
> is directly below.
>
> Just looking for insight from others in the know.
>
> Thanks,
> Chad
>
>
> Linux 2.6.17
> ------------------------------------------------------------------------
> test_bed$ python2.5 ./thrd_test.py
> Starting up
> MainThread.run(): 14332
> MainThread before sleep(15)
> ChildThread.run(): 14332
> ChildThread before sleep(10)
> Received signal 2                    <-- Interrupted here (Ctrl-C), correctly
> flag: True                                    interrupts sleep in main thread
> flag: False
> MainThread after sleep(15)
> Shutting down
>
> test_bed$ python2.4 ./thrd_test.py
> Starting up
> MainThread.run(): 14338
> MainThread before sleep(15)
> ChildThread.run(): 14338
> ChildThread before sleep(10)
> Received signal 2                     <-- Interrupted here (Ctrl-C), correctly
> flag: True                                    interrupts sleep in main thread
> flag: False
> MainThread after sleep(15)
> Shutting down
> test_bed$
>
> FreeBSD 4.11, 6.1, and 6.2
> ------------------------------------------------------------------------
> bash-2.05b# python2.5 ./thrd_test.py
> Starting up
> MainThread.run(): 65930
> ChildThread.run(): 65930
> ChildThread before sleep(10)
> MainThread before sleep(15)
> ^CChildThread after sleep(10)          <-- Interrupted here (Ctrl-C), but
> ChildThread before sleep(10)                 interrupts the child thrd's sleep
> ChildThread after sleep(10)
> ChildThread before sleep(10)
> Received signal 2                            <-- Main sleep concludes and then 
> flag: True                                           the signal gets handled
> flag: False
> MainThread after sleep(15)
> Shutting down
> bash-2.05b#
>
>
> #--- CODE BEGIN ---#
>
> #!/usr/bin/env python
>
> import os
> import sys
> import time
> import signal
> import threading
>
> def sigHandle(signo, stkframe):
>    print "Received signal ", signo
>    print "flag: ", mthrd.flag.isSet()
>    mthrd.flag.clear()
>    print "flag: ", mthrd.flag.isSet()
>
> class ChildThread(threading.Thread):
>
>    def __init__(self):
>        threading.Thread.__init__(self)
>
>    def run(self):
>        print "ChildThread.run(): ", os.getpid()
          mymod.blockall()
>        while (True):
>            print "ChildThread before sleep(10)"
>            time.sleep(10)
>            print "ChildThread after sleep(10)"
>
> class MainThread(object):
>
>    def __init__(self):
>        self.flag = threading.Event()
>        self.cthrd = ChildThread()
>        self.cthrd.setDaemon(True)
>
>    def run(self):
>        print "MainThread.run(): ", os.getpid()
>        self.flag.wait()
>        self.cthrd.start()
>        while (self.flag.isSet()):
>            print "MainThread before sleep(15)"
>            time.sleep(15)
>            print "MainThread after sleep(15)"
>        return    # or cleanup routine
>
> if __name__ == "__main__":
>
>    # Normally, the process is daemonized first. That's been
>    # left out for testing purposes.
>
>    signal.signal(signal.SIGINT, sigHandle)
>    signal.signal(signal.SIGQUIT, sigHandle)
>    signal.signal(signal.SIGTERM, sigHandle)
>
>    mthrd = MainThread()
>    print "Starting up"
>    mthrd.flag.set()
>    mthrd.run()
>    print "Shutting down"
>
>    sys.exit(0)
>
> #--- CODE END ---# 



From Roberto.Bonvallet at cern.ch  Thu Nov  9 10:55:57 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 9 Nov 2006 15:55:57 +0000 (UTC)
Subject: extract text from a string
References: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>
	<1163087453.530685.107840@b28g2000cwb.googlegroups.com>
Message-ID: <eivj2d$qla$1@cernne03.cern.ch>

Jon Clements wrote:
>> I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
>> become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
>> code of how to extract this text from that string?
> 
> [...] Going by your example, it's tempting to suggest the best method
> would be string_name[1:-1] and that you don't need a regex.

...or string_name.lstrip('+').rstrip('\n')

I bet he doesn't need a regexp!
Cheers,
-- 
Roberto Bonvallet


From fakeaddress at nowhere.org  Thu Nov  2 05:52:33 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 02 Nov 2006 10:52:33 GMT
Subject: Event driven server that wastes CPU when threaded doesn't
In-Reply-To: <mailman.1546.1162301964.11739.python-list@python.org>
References: <mailman.1546.1162301964.11739.python-list@python.org>
Message-ID: <R5k2h.2278$B31.1595@newssvr27.news.prodigy.net>

Jean-Paul Calderone wrote:
> On Tue, 31 Oct 2006 07:33:59 GMT, Bryan Olson <fakeaddress at nowhere.org> 
> wrote:
>> Snor wrote:
>>> I'm attempting to create a lobby & game server for a multiplayer game,
>>> and have hit a problem early on with the server design. I am stuck
>>> between using a threaded server, and using an event driven server. I've
>>> been told time and time again that I should use an event driven server
>>> design (that is, use twisted).
>>
>> I didn't hear the specifics of how you got that advice, so I
>> can't comment specifically. I will say that I've have heard a
>> lot of advice against threads that struck me as simply naive.
> 
> Much of it is quite well informed.

Could be; I didn't see it all. A lot was naive; I'd even say that
the majority was naive. The most sophisticated software -- DBMS's,
modern operating systems, avionics -- deals with multiple lines of
control. I'm not saying that playing at that level is easy. The
difficult problems are fundamental, and single-tasking merely takes
away important capabilities.


>>> There is a lot of interaction between the clients and they would often
>>> need to write to the same list of values, which of course becomes a
>>> problem with a threaded server - so event driven solves that problem,
>>> and I assumed it would solve all my problems. [...]
>>
>> The purely event-driven style solves some problems, but creates
>> others. You're forced to structure your code around the blocking
>> behavior, and that's not the structure anyone would choose for
>> clarity or maintainability.
> 
> This is not the case. 

What I claimed is the case is the case.

> However, much event-driven code is written
> this way anyway, intentionally, for clarity. If you _want_ opaque
> code, or for some reason think it is not opaque to write code in this
> manner, then there you can use a library which supports this.

Read the greats on the subject: modules should exhibit loose coupling
and tight cohesion. But the purely event-driven style imposes a rule
that must trump the principles of elegant design: no procedure, no
method, may include and encapsulate an operation that might block.
That's not for clarity; it's a limitation; it's broken.

>> Suppose we're enhancing an event-driven system, and decide to
>> relocate some datum from a variable to the database. Suppose in
>> one or more places, accessing the data happens in a call chain
>> several function down from the event loop. We can't just change
>> the function that accesses the data because a synchronous
>> database call could block and stop event processing. Every
>> interface on the call chain is broken.
> 
> As it must be, because you have changed the atomicity of an
> operation.

That's just naive. A thread switch and a return to the event
loop both have the chance to break atomicity, as do other
things.

> Transparently propagating this up a call stack leads to bugs which are
> similar to those found in a system based on pre-emptive multithreading.

Yet "system based on pre-emptive multithreading" are taking over.
Might as well get with the modern world. The competitive operating
systems are multi-threaded and multi-core hardware is now at the
local Best-Buy.

I'm not saying threads are trivial to master. I did not start out
at an advocate for programming with multiple threads and/or
processes. But I think the race is over, and even those that think
it's still on should be able to see that multiple lines of control
are both in lead and moving faster.


>> [...]
>>> I will want the server to support as many users as is possible on any
>>> given machine - and so wasted CPU cycles is something I am trying to
>>> avoid.
>>
>> Python is a great scripting language, but squeezing out machine
>> performance is not where scripting languages shine. That said, you
>> might start in Python, to see if your system is successful and the
>> performance of your server really is a limiting factor.
>>
>>
>>> Is the only solution to use a threaded server to let my clients make
>>> their requests and receive a response in the fastest possible time?
>>
>> Maybe. Probably not. It's all good -- multi-threading is your friend.
> 
> Multithreading is _someone's_ friend.  Probably not the OP's, whose
> original post made it sound very strongly like he just needed network
> concurrency, which is a perfectly fine use-case for event-driven style
> rather than pre-emptive threading.

I suggested he might start in Python (which has a global interpreter
lock) to see if his system gets the traction it needs.
But obviously no one is going to build a /World of Warcraft/ without
learning to deal with multiple simultaneous lines of execution.

It's all good. Multi-threading can be your friend too.


-- 
--Bryan



From johnjsal at NOSPAMgmail.com  Wed Nov  8 13:48:31 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Nov 2006 13:48:31 -0500
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
Message-ID: <455226c0$0$17087$c3e8da3@news.astraweb.com>

Dan Lenski wrote:

> So, is there another toolkit I should be looking at?

I highly recommend wxPython. It's very mature, full-featured, and 
portable, and fairly easy to learn as well. I can't really compare it to 
other toolkits (not having used any of them, except Tkinter), but it's 
definitely one of the most popular and well-supported ones out there.

http://www.wxpython.org/


From sjmachin at lexicon.net  Thu Nov  9 22:39:50 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 19:39:50 -0800
Subject: Excel file read/write?
In-Reply-To: <1163126286.504278.291010@i42g2000cwa.googlegroups.com>
References: <1163119339.334965.264850@i42g2000cwa.googlegroups.com>
	<1163123763.386857.255540@m7g2000cwm.googlegroups.com>
	<1163126286.504278.291010@i42g2000cwa.googlegroups.com>
Message-ID: <1163129990.826437.107010@b28g2000cwb.googlegroups.com>


Podi wrote:

>
> >
> > 2. OpenOffice.org has a built-in Python -- 2.n where n is a small
> > number :-( and almost impenetrable documentation -- Sybren Stuvel has
> > published some examples: http://www.stuvel.eu/ooo-python
> > but my guess is that all the users of the OOo interface could fit in a
> > taxi.
>
> Hmmm..., I have 2.4.2 and would not like to down grade myself.

It is a separate installation of Python, somewhere in the OOo directory
hierarchy. You would have to "down grade" yourself only when working
with OOo. In any case the documentation and the size of the user base
are showstoppers IMHO.

Cheers,
John



From usenet1 at anton.e4ward.com  Thu Nov  2 06:59:32 2006
From: usenet1 at anton.e4ward.com (Anton81)
Date: Thu, 02 Nov 2006 12:59:32 +0100
Subject: __div__ not recognized automatically
Message-ID: <eicmj4$sak$1@gwdu112.gwdg.de>

Hello!

I wrote a class

class NumX:
  ...
  def __add__(self,other):
    ...
  def __div__(self,other):
    if not isinstance(other,NumX): other=NumX(other)
    ...

Somewhere else I use

a=(b+c)/2

where all variables are of NumX Type. When I execute the program it
complains that it can't find an operator "/" for "instance" and "integer".
However if I use pdb the same command works when started on the prompt. Also
the manual execution

a=(b+c).__div__(2)

works. Any suggestions what goes wrong?

Anton


From george.sakkis at gmail.com  Sun Nov  5 17:12:58 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 5 Nov 2006 14:12:58 -0800
Subject: tips requested for a log-processing script
References: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>
Message-ID: <1162764778.620844.262910@m73g2000cwd.googlegroups.com>

Jaap wrote:

> Apart from this I have a configuration file, which contains the list of
> itemID's i need to focus on per month. Not all itemID's are relevant for
> each month, but for example only every second or third month. All
> records in the logfile with other itemID's can be ignored. I have yet to
> define the format of this configuration file, but am thinking about a 0
> or 1 for each month, and then the itemID, like:
> "1 0 0 1 0 0 1 0 0 1 0 0 123456" for a itemID 123456 which only needs
> consideration at first month of each quarter.

It's probably not necessary if your records are in the order of 100K,
but if you're dealing with millions and above, you can write your
config file in binary using the struct module and condense it down to 6
bytes per record (32 bits for the ID and 12 bits for the months
occurences). Filtering will also be faster, as for each record you just
have to do a bitwise AND with the 0..010...0 mask corresponding to a
given month.

George



From ask at me  Thu Nov 30 09:02:42 2006
From: ask at me (alf)
Date: Thu, 30 Nov 2006 08:02:42 -0600
Subject: More elegant to get a name: o.__class__.__name__
Message-ID: <z7mdnTF4I_wfefPYnZ2dnUVZ_rCdnZ2d@comcast.com>

Hi,
is there a more elegant way to get o.__class__.__name__. For instance I 
would imagine name(o).

-- 
alf


From george.sakkis at gmail.com  Mon Nov 27 00:05:02 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: Mon, 27 Nov 2006 05:05:02 -0000
Subject: ANN: Pyflix-0.1
Message-ID: <mailman.754.1164603815.32031.python-announce-list@python.org>

Hi there,

I'm happy to announce Pyflix, a small Python package that provides an
easy entry point for those wishing to get up and running at the Netflix
Prize competition (http://www.netflixprize.com/). For those who are not
aware of it, the Netflix Prize challenge is to write a recommendation
algorithm that improves the accuracy of predictions about how much
someone is going to love a movie based based on their past ratings.
Netflix offers $1,000,000 (one million dollars) to the first team that
provides an algorithm that outperforms Cinematch (TM), the movie
recommendation system developed by Netflix, by 10% or more; there's
also a $50,000 Progress Prize awarded to the team with the most
improvement over the previous year's accuracy.

Pyflix requires Python 2.4 or later and Numpy 1.0. It combines an
efficient storage scheme with a high-level API that allows contestants
to focus on the real problem, the recommendation system algorithm.

You may download Pyflix and find more about it at
http://pyflix.python-hosting.com.

Enjoy and good luck!

George



From titogarcia_nospamplease_ at gmail.com  Sun Nov  5 08:17:55 2006
From: titogarcia_nospamplease_ at gmail.com (=?ISO-8859-1?Q?Ernesto_Garc=EDa_Garc=EDa?=)
Date: Sun, 05 Nov 2006 14:17:55 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <eiklvo$5uj$1@hefestos.uned.es>
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <eikoa5$7p7$1@hefestos.uned.es>

Ernesto Garc?a Garc?a wrote:
> Hi experts,
> 
> it's very common that I have a list and I want to print it with commas 
> in between. How do I do this in an easy manner, whithout having the 
> annoying comma in the end?
> 
> <code>
> 
> list = [1,2,3,4,5,6]
> 
> # the easy way
> for element in list:
>   print element, ',',
> 
> print
> 
> 
> # this is what I really want. is there some way better?
> if (len(list) > 0):
>   print list[0],
>   for element in list[1:]:
>     print ',', element,
> 
> </code>
> 
> Thx,
> Ernesto

mylist = [1,2,3,4,5,6]
print ','.join(map(str, mylist))

Great solution!

Thank all of you,
Ernesto


From ptmcg at austin.rr._bogus_.com  Thu Nov 30 17:33:14 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 30 Nov 2006 22:33:14 GMT
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
	<qqGbh.10436$Gk5.6159@tornado.texas.rr.com>
	<1164916148.930057.280350@f1g2000cwa.googlegroups.com>
	<1164916437.055932.193130@79g2000cws.googlegroups.com>
	<1164917296.255080.149660@j72g2000cwa.googlegroups.com>
Message-ID: <K_Ibh.10471$Gk5.4554@tornado.texas.rr.com>

"John Henry" <john106henry at hotmail.com> wrote in message 
news:1164917296.255080.149660 at j72g2000cwa.googlegroups.com...
>
> John Henry wrote:
>
>>
>> Further, if splitUp is a sub-class of string, then I can do:
>>
>> alist, blist, clist, dlist = "ABCDEFGHIJ".slice((1,1,3,None))
>>
>> Now, can I override the slice operator?
>
> Maybe like:
>
> alist, blist, clist, dlist = newStr("ABCDEFGHIJ")[1,1,3,None]
>

No need to contort string, just expand on your earlier idea.  I changed your 
class name to SplitUp to more more conventional (class names are usually 
capitalized), and changed slice to __call__.  Then I changed the lens arg to 
*lens - note the difference in the calling format.  Pretty close to what you 
have above.  Also, reconsider whether you want the __init__ function 
list-ifying the input src - let the caller decide what to send in.

-- Paul

class SplitUp(object):
   def __init__(self,src):
       self._src=list(src)
   def __call__(self, *lens):
     ret = []
     cur = 0
     for length in lens:
         if length is not None:
             ret.append( self._src[cur:cur+length] )
             cur += length
         else:
             ret.append( self._src[cur:] )
     return ret

alist, blist, clist, dlist = SplitUp("ABCDEFGHIJ")(1,1,3,None)
print alist, blist, clist, dlist

Prints:
['A'] ['B'] ['C', 'D', 'E'] ['F', 'G', 'H', 'I', 'J']




From fredrik at pythonware.com  Wed Nov  1 15:43:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 21:43:29 +0100
Subject: Remote Objects via CGI?
In-Reply-To: <1162413520.985353.272940@e64g2000cwd.googlegroups.com>
References: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>	<4qrto9FnvnaqU1@uni-berlin.de>
	<1162413520.985353.272940@e64g2000cwd.googlegroups.com>
Message-ID: <eib0th$aib$1@sea.gmane.org>

kpd wrote:

> I did not have much hope, but thought there might be something.  I was
> thinking of going this route to get a very quick solution to a python
> fat-client adding to or retrieving objects from a community repository
> over http.
> 
> XMLRpc could work if there is a CGI solution, although the data sets do
> not lend themselves to XML.  They are tuples of 6 floats about 2000 to
> a data set.

sounds like native HTTP plus mime/multipart messages is all you need. 
just POST or GET to a CGI script, and use the email module to create and 
pull apart the messages.

</F>



From fredrik at pythonware.com  Sat Nov 11 03:19:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 11 Nov 2006 09:19:14 +0100
Subject: UnboundLocalError
In-Reply-To: <1163232187.747318.132260@m73g2000cwd.googlegroups.com>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>	<mailman.1994.1163100168.11739.python-list@python.org>	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>	<1163223355.190176.127030@h48g2000cwc.googlegroups.com>	<mailman.2085.1163229531.11739.python-list@python.org>
	<1163232187.747318.132260@m73g2000cwd.googlegroups.com>
Message-ID: <ej4125$u3k$1@sea.gmane.org>

Camellia wrote:

> Oh how can I thank you enough, you make my day:)
> According to what you said I finally figure it out, it is the same as:
> 
> <code>
> b = 1
> def a():
>     b = b #no good:)
> </code>

if you really want to modify a variable that lives outside the function, 
you can use the "global" directive:

http://effbot.org/pyfaq/how-do-you-set-a-global-variable-in-a-function.htm

 > So in every day programming I should avoid using the same name for
 > different types of objects because they will step on each other,
 > right?

if you want to distinguish between things, giving them distinct names is 
always a good idea.

</F>



From mccredie at gmail.com  Thu Nov 30 20:22:55 2006
From: mccredie at gmail.com (Matimus)
Date: 30 Nov 2006 17:22:55 -0800
Subject: String formatters with variable argument length
References: <mailman.905.1164931966.32031.python-list@python.org>
Message-ID: <1164936175.099236.263100@l12g2000cwl.googlegroups.com>

> Could it be as I fear, that it is impossible?

p'shaw, you underestimate the power of the Python...

I think this is a poor solution (I would go with the solution in John
Machin's second post) but here it is anyway since it does essentially
what you asked for:

[code]
def print_data(fmtstr):
    data = (10,11,12,13)
    for i in xrange(len(data)):
        try:
            print fmtstr %data[:i+1]
            break
        except:
            pass
[/code]



From chris.cavalaria at free.fr  Mon Nov 13 12:02:18 2006
From: chris.cavalaria at free.fr (Christophe)
Date: Mon, 13 Nov 2006 18:02:18 +0100
Subject: explicit self revisited
In-Reply-To: <mailman.69.1163437062.32031.python-list@python.org>
References: <ej5fuv$a4a$1@online.de>	<mailman.2110.1163283825.11739.python-list@python.org>	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>	<mailman.2119.1163289905.11739.python-list@python.org>	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>	<1163351573.3497.26.camel@localhost.localdomain>	<ej7m2l$tsm$1@sea.gmane.org>
	<ej8cu7$vtt$1@sea.gmane.org>
	<mailman.69.1163437062.32031.python-list@python.org>
Message-ID: <4558a51d$0$20318$426a74cc@news.free.fr>

Simon Brunning a ?crit :
> On 11/13/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>>
>> > I suppose that in his view, language advocacy is a zero-sum game, so
>> > positive comments about Python can be considered as FUD against his own
>> > project.  He's even invented his own del.icio.us tag for this purpose:
>> >
>> >      http://del.icio.us/tag/pythonfud
>>
>> now at:
>>
>>      http://del.icio.us/tag/python-fud
>>
>> </F>
> 
> Hey, Fredrik, you have your own tag!
> <http://del.icio.us/tag/fredrik-lundh-troll> I wish *I* had my own
> tag. ;-)
> 
> I notice that, as you predicted, Python's lack of a goto is in there too.

Hey, this is fun :D I also found that one : 
http://del.icio.us/dholton/python-fud-by-fredrik-lundh

But is seems they all point to the same article than yours so you get 
the points for it ;)


From cjw at sympatico.ca  Thu Nov  9 14:34:57 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 09 Nov 2006 14:34:57 -0500
Subject: Help solving Python 2.5 crash: The instruction "0x7c168f1d" 
	referenced memory at "0x00000001c
In-Reply-To: <26195e840611080738q17af56afn4a41a7a4940359db@mail.gmail.com>
References: <5a00f6240611080650i78ee03eawf716e358ca221bab@mail.gmail.com>
	<26195e840611080738q17af56afn4a41a7a4940359db@mail.gmail.com>
Message-ID: <eivvt3$rau$1@sea.gmane.org>

Pedro Rodrigues wrote:
> Hi Bugra,
>  
> thanks for your reply. I did try the same code on a Windows 2000 system 
> where I also installed and later removed Python 2.5. There, I obtained 
> the same problem :( That's why I think it has to do with software. I've 
> also searched on the internet and this problem seems to come up also 
> with other sorts of applications. This lead me to think that there might 
> be some inconsistency in the Registry of Windows or some files that have 
> been left behind after uninstall. I've tried to address these two 
> possibilities but so far I did not succeed :(
>  
> pedro
> 
>  
> On 11/8/06, *Bugra Cakir* <bugracakir at gmail.com 
> <mailto:bugracakir at gmail.com>> wrote:
> 
>     Hi,
> 
>     I have came across this like problem in my simulations also. But the
>     case is not for the program structure or
>     python version, the case is hardware :) . If you have time to try it
>     on some other machine than the current and
>     if the problem arises then there is something different!
> 
>     --
>     http://mail.python.org/mailman/listinfo/python-list
> 
> 
I've had this sort of problem when attempting to interface with 
OpenOffice.  It appeared to be connected with the fact that OO
starts a second process, but I didn't pursue it.

Colin W.



From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 11:04:54 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 16:04:54 GMT
Subject: forwarding *arg parameter
In-Reply-To: <4r6f10Fq3lvfU1@uni-berlin.de>
References: <6pn3h.125$7b6.98@read3.inet.fi> <4r6f10Fq3lvfU1@uni-berlin.de>
Message-ID: <GYn3h.132$7b6.60@read3.inet.fi>

Diez B. Roggisch wrote:
> Tuomas schrieb:
> 
>>  >>> def g(*arg):
>> ...     return arg
>> ...
>>  >>> g('foo', 'bar')
>> ('foo', 'bar')
>>  >>> # seems reasonable
>> ...
>>  >>> g(g('foo', 'bar'))
>> (('foo', 'bar'),)
>>  >>> # not so good, what g should return to get rid of the outer tuple
> 
> 
> g(*g('foo', 'bar'))
> 
> 
> * and **  are the symetric - they capture ellipsis arguments, and they 
> make iterables/dicts passed as positional/named arguments.
> 
> Diez

Thanks Diez

And what about this case if I want the result ('foo', 'bar')

 >>> def f(*arg):
...     return g(arg)
...
 >>> f('foo', 'bar')
(('foo', 'bar'),)

 >>> def h(*arg):
...     return arg[0]
...
 >>> g=h
 >>> f('foo', 'bar')
('foo', 'bar')

Where can g know it should use arg[0] when arg is forwarded?

TV


From __peter__ at web.de  Mon Nov 27 04:48:16 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 27 Nov 2006 10:48:16 +0100
Subject: Generator question
References: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>
	<mailman.734.1164533418.32031.python-list@python.org>
	<456a2204$0$11868$3b214f66@tunews.univie.ac.at>
Message-ID: <ekec7m$r88$00$1@news.t-online.com>

Mathias Panzenboeck wrote:

> Robert Kern wrote:
>> Timothy Wu wrote:
>>> Hi,
>>>
>>> Using generator recursively is not doing what I expect:
>>>
>>> def test_gen(x):
>>>     yield x
>>>     x = x - 1
>>>     if x != 0:
>>>         test_gen(x)
>> 
>> The only thing that the last line does is *create* a new generator
>> object. You need to actually iterate over it and yield its values. E.g.
>> 
>> 
>> In [2]: def test_gen(x):
>>    ...:     yield x
>>    ...:     x -= 1
>>    ...:     if x != 0:
>>    ...:         for y in test_gen(x):
>>    ...:             yield y
>>    ...:
>>    ...:
>> 
>> In [3]: list(test_gen(3))
>> Out[3]: [3, 2, 1]
>> 
>> 
> 
> why not this?

Because it doesn't answer the OP's question about recursive generators?
 
> def test_gen(x):
>     for y in xrange(x,0,-1):
>         yield y
> 
> or even better/shorter:
> 
> test_gen = lambda x: xrange(x,0,-1)

That's not a generator:

>>> g = test_gen(2)
>>> g.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'xrange' object has no attribute 'next'
>>> list(g)
[2, 1]
>>> list(g)
[2, 1]

This is:

>>> g = iter(xrange(2, 0, -1))
>>> g.next()
2
>>> list(g)
[1]
>>> list(g)
[]

Unless you are using it in a single for loop, the difference is not so
subtle...

Peter


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 24 08:24:26 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 24 Nov 2006 14:24:26 +0100
Subject: socket.error connection refused
References: <B58381932.818.38963.1@mxextra>
	<mailman.635.1164284752.32031.python-list@python.org>
	<1164285165.811809.175040@j72g2000cwa.googlegroups.com>
	<4slngrF10ij2pU1@mid.individual.net>
	<1164292108.395755.172250@f16g2000cwb.googlegroups.com>
	<1164362048.683892.257420@f16g2000cwb.googlegroups.com>
Message-ID: <4soa45F10bvlsU1@mid.individual.net>

Vania wrote:

> For anyone interested restarting windows fixed the connection
> problem.

Some nifty "firewall" software? 8)

Regards,


Bj?rn

-- 
BOFH excuse #78:

Yes, yes, its called a design limitation



From __peter__ at web.de  Thu Nov 30 05:17:17 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 30 Nov 2006 11:17:17 +0100
Subject: Slicing versus loops, was Re: for i in range() anti-pattern
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
Message-ID: <ekmb29$hj3$02$1@news.t-online.com>

Steven D'Aprano wrote:

> And remember that if alist is truly huge, you may take a performance hit
> due to duplicating all those megabytes of data when you slice it. 

Having the same object in two lists simultaneously does not double the total
amount of memory; you just need space for an extra pointer.

> If you 
> are modifying the original, better to skip making a slice.
> 
> I wrote a piece of code the other day that had to walk along a list,
> swapping adjacent elements like this:
> 
> for i in xrange(0, len(alist)-1, 2):
>     alist[i],?alist[i+1]?=?alist[i+1],?alist[i]
> 
> 
> The version using enumerate is no improvement:
> 
> for i, x in enumerate(alist[0:len(alist)-1:2]):
>     alist[i*2],?alist[i*2+1]?=?alist[i*2+1],?x
> 
> 
> In my opinion, it actually is harder to understand what it is doing.
> Swapping two items using "a,b = b,a" is a well known and easily recognised
> idiom. Swapping two items using "a,b = b,c" is not.

That example was chosen to prove your point. The real contender for the
"swap items" problem are slices. 

def swap_slice(items):
    left = items[::2]
    items[::2] = items[1::2]
    items[1::2] = left
    return items

def swap_loop(items):
    for i in xrange(0, len(items)-1, 2):
        k = i+1
        items[i], items[k] = items[k], items[i]
    return items

$ python2.5 -m timeit -s 'from swap import swap_loop as swap; r =
range(10**6)' 'swap(r)'
10 loops, best of 3: 326 msec per loop
$ python2.5 -m timeit -s 'from swap import swap_slice as swap; r =
range(10**6)' 'swap(r)'
10 loops, best of 3: 186 msec per loop

$ python2.5 -m timeit -s 'from swap import swap_loop as swap; r =
range(10**7)' 'swap(r)'
10 loops, best of 3: 3.27 sec per loop
$ python2.5 -m timeit -s 'from swap import swap_slice as swap; r =
range(10**7)' 'swap(r)'
10 loops, best of 3: 2.29 sec per loop

With 10**7 items in the list I hear disc access on my system, so the
theoretical sweet spot where swap_slice() is already swapping while
swap_loop() is not may be nonexistent...

Peter



From bj_666 at gmx.net  Tue Nov 21 04:13:38 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 21 Nov 2006 10:13:38 +0100
Subject: class method vs static method
References: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.21.09.13.38.208523@gmx.net>

In <1164098781.577358.90850 at j44g2000cwa.googlegroups.com>, Chris Brat
wrote:

> I've done some reading up but I cant get my head around how/why class
> methods can be used as apposed to static methods.
> 
> Can anyone give an example of where they have used class methods?

----
class Spam(object):
    def __init__(self, data):
        self.data = data
    
    @classmethod
    def load(cls, filename):
        # Open file and load data.
        data = 'eric'
        return cls(data)

class Ham(Spam):
    pass

ham = Ham.load('test.dat')
print type(ham)
----

Here the type of `ham` is ``<class '__main__.Ham'>`` because a class
method will receive the class on which the method is called as first
argument. In a static method you don't know if it is called on the class
where the method is defined or on a subclass.

Ciao,
	Marc 'BlackJack' Rintsch


From fredrik at pythonware.com  Fri Nov 17 05:17:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 11:17:37 +0100
Subject: C extensions and memory leakage
In-Reply-To: <1163758039.754781.199940@h54g2000cwb.googlegroups.com>
References: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>	<pan.2006.11.17.08.38.17.567889@gmx.net>
	<1163758039.754781.199940@h54g2000cwb.googlegroups.com>
Message-ID: <ejk284$rue$1@sea.gmane.org>

Sheldon wrote:

> I am very new at this C extensions in Python so my term wrapper was
> probably a misnomer. Perhaps glue is better or the interface that
> allows the exchange of data between Python and C.
> Yes, I am using python objects in my C extension.
> Tell me where I can find out more about this reference counters? Or
> perhaps you can tell something about it.

http://docs.python.org/ext/refcounts.html

</F>



From chrisBrat at gmail.com  Mon Nov 13 08:48:54 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 13 Nov 2006 05:48:54 -0800
Subject: Python development time is faster.
Message-ID: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>

I've seen a few posts, columns and articles which state that one of the
advantages of Python is that code can be developed x times faster than
languages such as <<Insert popular language name here>>.

Does anyone have any comments on that statement from personal
experience?
How is this comparison measured?


Thanks
Chris



From fredrik at pythonware.com  Thu Nov 16 10:08:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 16:08:59 +0100
Subject: ini files and plugins
References: <455c7d58$0$21668$426a74cc@news.free.fr>
Message-ID: <ejhuub$m0d$1@sea.gmane.org>

"tool69" wrote:

> 1 -  create a sort of ini file where I can put the user configuration
> that will load itself on the application startup ;

http://docs.python.org/lib/module-ConfigParser.html ?

> 2 -  a simple plugin system with python files ( maybe to add new
> langages, etc.) ;

http://effbot.org/zone/import-string.htm ?

</F> 





From fredrik at pythonware.com  Tue Nov 28 14:07:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 20:07:07 +0100
Subject: How to increase the speed of this program?
In-Reply-To: <1164739788.335821.239100@n67g2000cwd.googlegroups.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>	<ekgt97$31p$00$2@news.t-online.com>	<ekgto0$khn$02$1@news.t-online.com>	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>	<ekh0nm$9sh$00$1@news.t-online.com>	<ekh10m$9sh$00$2@news.t-online.com>	<1164714786.086910.288450@45g2000cws.googlegroups.com>	<mailman.801.1164715357.32031.python-list@python.org>
	<1164739788.335821.239100@n67g2000cwd.googlegroups.com>
Message-ID: <eki1cr$a5s$1@sea.gmane.org>

John Machin wrote:

> Thanks, that's indeed faster than array(t, [v]*n) but what I had in
> mind was something like an additional constructor:
> 
> array.filledarray(typecode, repeat_value, repeat_count)
> 
> which I speculate should be even faster.

before you add a new API, you should probably start by borrowing the 
repeat code from Object/stringobject.c and see if the speedup is good 
enough.

</F>



From steve at holdenweb.com  Fri Nov  3 23:25:32 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Nov 2006 04:25:32 +0000
Subject: PySchool - Online Python Web Framework Workshop.
In-Reply-To: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
Message-ID: <eih4lk$68m$1@sea.gmane.org>

RobJ wrote:
> Hi! My Name is Rob Johnson and I am a graduate student at The Richard
> Stockton College of NJ. To make a long story short, I'm working on my
> Masters project in the MAIT program (Masters of Arts in Instructional
> Technology). I have written a proposal to put together a free on-line
> Python web framework workshop. The workshop will be geared to help
> people new to Python web frameworks. I am asking for the community's
> assistance to help me get this project off the ground. As part of my
> project, I am conducting a survey for people who are interested in
> learning more about python web frameworks.  The survey is located at
> http://killersurvey.com/answer_survey.php?id=479. I have also started a
> blog about this experience in order to let people know what I'm doing
> (http://pyschool.blogspot.com/). If you have a few minutes, please take
> a couple of minutes to take the quick survey. The survey is anonymous
> and the information will be used for statistics for my project. Also,
> any constructive feedback or suggestions that you can give me would be
> gladly appreciated.  
> 
Q2 should not be a radio button, since you ask submitters to "check all 
that apply".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From anthra.norell at vtxmail.ch  Thu Nov 16 04:43:00 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Thu, 16 Nov 2006 10:43:00 +0100
Subject: multi split function taking delimiter list
In-Reply-To: <1163600427.874213.41340@b28g2000cwb.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>	<1163541478.391883.227320@e3g2000cwe.googlegroups.com>	<1163573899.153057.242510@f16g2000cwb.googlegroups.com>
	<1163600427.874213.41340@b28g2000cwb.googlegroups.com>
Message-ID: <455C32A4.3080607@vtxmail.ch>

Paddy wrote:
> Paddy wrote:
>
>> Paddy wrote:
>>
>>> martinskou at gmail.com wrote:
>>>
>>>> Hi, I'm looking for something like:
>>>>
>>>> multi_split( 'a:=b+c' , [':=','+'] )
>>>>
>>>> returning:
>>>> ['a', ':=', 'b', '+', 'c']
>>>>
>>>> whats the python way to achieve this, preferably without regexp?
>>>>
>>>> Thanks.
>>>>
>>>> Martin
>>> I resisted my urge to use a regexp and came up with this:
>>>
>>>>>> from itertools import groupby
>>>>>> s = 'apple=blue+cart'
>>>>>> [''.join(g) for k,g in groupby(s, lambda x: x in '=+')]
>>> ['apple', '=', 'blue', '+', 'cart']
>>> For me, the regexp solution would have been clearer, but I need to
>>> stretch my itertools skills.
>>>
>>> - Paddy.
>> Arghhh!
>> No colon!
>> Forget the above please.
>>
>> - Pad.
>
> With colon:
>
>>>> from itertools import groupby
>>>> s = 'apple:=blue+cart'
>>>> [''.join(g) for k,g in groupby(s,lambda x: x in ':=+')]
> ['apple', ':=', 'blue', '+', 'cart']
>
> - Pad.
>
Automatic grouping may or may not work as intended. If some subsets 
should not be split, the solution raises a new problem.

I have been demonstrating solutions based on SE with such frequency of 
late that I have begun to irritate some readers and SE in sarcastic 
exaggeration has been characterized as the 'Solution of Everything'. 
With some trepidation I am going to demonstrate another SE solution, 
because the truth of the exaggeration is that SE is a versatile tool for 
handling a variety of relatively simple problems in a simple, 
straightforward manner.

 >>> test_string =  'a:=b+c: apple:=blue:+cart''
 >>> SE.SE (':\==/:\=/ +=/+/')(test_string).split ('/')   # For repeats 
the SE object would be assigned to a variable
['a', ':=', 'b', '+', 'c: apple', ':=', 'blue:', '+', 'cart']

This is a nuts-and-bolts approach. What you do is what you get. What you 
want is what you do. By itself SE doesn't do anything but search and 
replace, a concept without a learning curve. The simplicity doesn't 
suggest versatility. Versatility comes from application techniques.
    SE is a game of challenge. You know the result you want. You know 
the pieces you have. The game is how to get the result with the pieces 
using search and replace, either per se or as an auxiliary, as in this 
case for splitting. That's all. The example above inserts some 
appropriate split mark ('/'). It takes thirty seconds to write it up and 
see the result. No need to ponder formulas and inner workings. If you 
don't like what you see you also see what needs to be changed. Supposing 
we should split single colons too, adding the corresponding substitution 
and verifying the effect is a matter of another ten seconds:

 >>> SE.SE (':\==/:\=/ +=/+/ :=/:/')(test_string).split ('/')
['a', ':=', 'b', '+', 'c', ':', ' apple', ':=', 'blue', ':', '', '+', 
'cart']

Now we see an empty field we don't like towards the end. Why?

 >>> SE.SE (':\==/:\=/ +=/+/ :=/:/')(test_string)
'a/:=/b/+/c/:/ apple/:=/blue/://+/cart'

Ah! It's two slashes next to each other. No problem. We de-multiply 
double slashes in a second pass:

 >>> SE.SE (':\==/:\=/ +=/+/ :=/:/ | //=/')(test_string).split ('/')
['a', ':=', 'b', '+', 'c', ':', ' apple', ':=', 'blue', ':', '+', 'cart']

On second thought the colon should not be split if a plus sign follows:

 >>> SE.SE (':\==/:\=/ +=/+/ :=/:/ :+=:/+/ | //=/')(test_string).split ('/') 

['a', ':=', 'b', '+', 'c', ':', ' apple', ':=', 'blue:', '+', 'cart']

No, wrong again! 'Colon-plus' should be exempt altogether. And no spaces 
please:

 >>> SE.SE (':\==/:\=/ +=/+/ :=/:/ :+=:+ " =" | 
//=/')(test_string).split ('/')
['a', ':=', 'b', '+', 'c', ':', 'apple', ':=', 'blue:+cart']

etc.

It is easy to get carried away and to forget that SE should not be used 
instead of Python's built-ins, or to get carried away doing contextual 
or grammar processing explicitly, which gets messy very fast. SE fills a 
gap somewhere between built-ins and parsers.
     Stream editing is not a mainstream technique. I believe it has the 
potential to make many simple problems trivial and many harder ones 
simpler. This is why I believe the technique deserves more attention, 
which, again, may explain the focus of my posts.

Frederic



From lardissone at gmail.com  Wed Nov 29 11:37:21 2006
From: lardissone at gmail.com (Leandro Ardissone)
Date: 29 Nov 2006 08:37:21 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <ekkchm$6e3$2@cernne03.cern.ch>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
	<1164817535.636391.294310@n67g2000cwd.googlegroups.com>
	<ekkchm$6e3$2@cernne03.cern.ch>
Message-ID: <1164818241.062449.54180@80g2000cwy.googlegroups.com>

great,

that is just what I need!

Thank you all!

--
Leandro Ardissone

On Nov 29, 1:29 pm, Roberto Bonvallet <Roberto.Bonval... at cern.ch>
wrote:
> Leandro Ardissone wrote:
> > And how I can compare this "<type 'str'>" output ?
> > I want to decide what to do if the var is an string and what to do if
> > not..
>
> > Tried with:
> > if type(artistList) == "<type 'list'>":
>
> > and
> > if type(artistList) == "list":
>
> > but nothing..type() doesn't return a string, it returns a type object.
> You should try this:
>
>     if isinstance(artistList, list):
>         ...
> 
> Cheers,
> --
> Roberto Bonvallet



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 10 10:54:02 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 10 Nov 2006 16:54:02 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
Message-ID: <4rjlkqFrlskqU1@mid.individual.net>

Neil Cerutti wrote:
> On 2006-11-09, Bjoern Schliessmann

>> if color == red or blue or green:
>>     return 'primary'
>>
>>:)
 
> The Inform 6* programming language supports the serial 'or' (and
> 'and') and looks just like that.

Python also supports it.

> The disadvantage is that the usual binary logical operators must
> exist and are spelled differently. (It uses C's '||' and '&&'.)

Do they have to be spelled differently? In Python, they don't have
to.

Regards,


Bj?rn

-- 
BOFH excuse #115:

your keyboard's space bar is generating spurious keycodes.



From nospam at domain.tld  Mon Nov 13 00:23:54 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Mon, 13 Nov 2006 06:23:54 +0100
Subject: Searching for a module to generate GUI events
References: <eis853$92c$1@kohl.informatik.uni-bremen.de>
	<1162990029.409193.246830@b28g2000cwb.googlegroups.com>
	<ej13u2$ps2$1@kohl.informatik.uni-bremen.de>
	<1163157631.425155.218460@h48g2000cwc.googlegroups.com>
Message-ID: <ej8vha$bmr$1@kohl.informatik.uni-bremen.de>

Paul Boddie wrote:

> Searching for "Python GUI testing" on Google gave this as the first
> result:

Thank you very much, this looks very promissing to me. Seems to be a very
usefull skill, if one is able to type the right words at the google prompt.
Think, I should learn that some day... ;-)

Stephan



From exarkun at divmod.com  Fri Nov 17 18:55:52 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 17 Nov 2006 18:55:52 -0500
Subject: Inotify on netfilter socket
In-Reply-To: <455E3D43.5030404@t0mb.net>
Message-ID: <20061117235552.20948.1102272331.divmod.quotient.31592@ohm>

On Fri, 17 Nov 2006 22:52:51 +0000, tom <tom at t0mb.net> wrote:
>Hi Guys,
>
>I'm wondering if it's possible to set up an inotify watch on a netfilter
>socket.  I want to monitor for incoming packets to the netfilter QUEUE
>target, but I can't seem to do it. select.select works on it, but i
>wanted to use inotify really.  Is there any way to create a tangible
>file which i can hook in to the netfilter socket?  I was using
>python-inotify and the ipqueue module.  Any suggestions welcome, or do
>you guys think that this would be better on the iptables/netfilter
>mailing lists?

Why do you want to use inotify?

Jean-Paul


From jseigh_01 at xemaps.com  Wed Nov  8 09:40:13 2006
From: jseigh_01 at xemaps.com (Joe Seigh)
Date: Wed, 08 Nov 2006 09:40:13 -0500
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162992063.382185.5440@h48g2000cwc.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<1162939715.915139.146890@b28g2000cwb.googlegroups.com>
	<455166B6.6040009@v.loewis.de>
	<1162992063.382185.5440@h48g2000cwc.googlegroups.com>
Message-ID: <2vGdnYkaQtpKdszYnZ2dnUVZ_qednZ2d@comcast.com>

Ross Ridge wrote:
> Ross Ridge schrieb:
> 
>>So give an example where reference counting is unsafe.
> 
> 
> Martin v. L?wis wrote:
> 
>>Nobody claimed that, in that thread. Instead, the claim was
>>"Atomic increment and decrement instructions are not by themselves
>>sufficient to make reference counting safe."
> 
> 
[...]
> 
> The problem your describing isn't that reference counting hasn't been
> made safe.  What you and Joe seem to be trying to say is that atomic
> increment and decrement instructions alone don't make accessing shared
> structure members safe.

How you increment and decrement a reference count is an implementation
issue and whether it's correct or not depends on the semantics of the
refcount based pointer.  I.e. what kind of thread safety guarantees
are we ascribing to pointer operations?  Java reference (pointer)
guarantees are not the same as C++ Boost shared_ptr guarantees.  In
Java simple pointer assignment, "a = b;" is always safe no matter what
any other thread may be doing to a and/or b.   With shared_ptr you have
to have a priori knowlege that the refcount for b will never go to
zero during the copy operation.  Usually that implies ownership of b.

To get a better feeling for the latter semantics you should take a look
at C++ String implementations.  A C++ String COW (copy on write) implementation
using atomic inc/dec is as thread-safe as a non-COW String implementation
because in both cases you have to own the strings you access.

About the term "thread-safe".  In Posix it's taken as meaning an operation
on non-shared data isn't affected by other threads.  So non-COW strings
are thread-safe, and COW strings are thread-safe if their internal
refcounting is synchronized properly.   But note that in both cases,
the implemention is transparent to the user.

So as you say, a lot depends on how you access or want to access shared
structure members, e.g. with or without locking. 


-- 
Joe Seigh

When you get lemons, you make lemonade.
When you get hardware, you make software. 


From antroy at gmail.com  Thu Nov  9 11:53:22 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 08:53:22 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163086262.252635.35400@m73g2000cwd.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163077141.110334.136080@i42g2000cwa.googlegroups.com>
	<1163086262.252635.35400@m73g2000cwd.googlegroups.com>
Message-ID: <1163091202.449373.58700@b28g2000cwb.googlegroups.com>

> May I ask another quetion?  I don't want to mess with lots of plugins
> at this point. What are the minimum plugins to get a typical looking
> IDE with a code window and output window and that lets me set
> breakpoints and step through code?

The Console plugin is a must (I think it depends on the ErrorList
plugin which is also very useful as I noted above). JPyDebug is an
interactive debugger - I have never used it mind, I usually rely on
print statements to debug stuff.



From Tim.Golden at viacom-outdoor.co.uk  Wed Nov 22 07:27:44 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 22 Nov 2006 12:27:44 -0000
Subject: file backup in windows
In-Reply-To: <1164196688.000016.25350@e3g2000cwe.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B610@vogbs009.gb.vo.local>

| > <code>
| > import os, sys
| > from win32com.shell import shell, shellcon
| >
| > local_app_data = shell.SHGetSpecialFolderPath (0,
| > shellcon.CSIDL_LOCAL_APPDATA)
| > outlook_path = os.path.join (local_app_data, "Microsoft", "Outlook")
| >
| > print outlook_path
| >
| > </code)
| >
| 
| The above code was fine while printing, when I am trying to use this
| (outlook_path) to use as source path it is giving file 
| permission error

As others have suggested, please cut-and-paste code 
and traceback from an interpreter session. Don't make 
people guess what you've done. My code above doesn't
do anything with the path bar printing it, so you've
obviously attempted some kind of file operation with
it. What have you done? The outlook_path itself is a
*folder*, not a file. I didn't write out all of your
code; you need to add something to copy the file or
files you need. Have you done that?

Please provide code and traceback if you still have
difficulties.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From jUrner at arcor.de  Tue Nov  7 09:17:00 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 7 Nov 2006 06:17:00 -0800
Subject: shutil: permission denied errors on windows
In-Reply-To: <af162$45505aea$544abc47$10376@news.hispeed.ch>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
	<1162858987.931532.61530@h48g2000cwc.googlegroups.com>
	<af162$45505aea$544abc47$10376@news.hispeed.ch>
Message-ID: <1162909020.730239.222550@m73g2000cwd.googlegroups.com>


Antoine De Groote schrieb:

> Yes it's strange, I never had the problem before, either. It seems now
> to be only the case for folders. A very simple
>
> shutil.copy('a', 'b')
>
> already fails with the error message.
>
> I reinstalled Python, but that didn't change anything...
>
> Regards,
> antoine
>

Just a guess, update you virus scanner. Maybe someone sits in the back
and doesn't like what you are doing.

Regards J?rgen



From scheols at gmail.com  Thu Nov 30 00:56:42 2006
From: scheols at gmail.com (Scheol Service)
Date: Wed, 29 Nov 2006 23:56:42 -0600
Subject: Easier way yo use Py2exe
Message-ID: <5b0fce7a0611292156l38a20a40la590d9b7377219d4@mail.gmail.com>

The directions are confusing. Can someone clear them up.

Intructions Location: http://www.py2exe.org/index.cgi/Tutorial

OS: Windows XP Pro.


From steve at rueb.com  Wed Nov 29 18:59:38 2006
From: steve at rueb.com (Steve Bergman)
Date: 29 Nov 2006 15:59:38 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164843185.361082.146740@16g2000cwy.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<1164843185.361082.146740@16g2000cwy.googlegroups.com>
Message-ID: <1164844778.623531.275300@h54g2000cwb.googlegroups.com>


dickinsm at gmail.com wrote:
> > BTW, can this code be made any more efficient?
>
> I'm not sure, but the following code takes around 6 seconds on my
> 1.2Ghz iBook. How does it run on your machine?
>
>

Hmm.  Come to think of it, my algorithm isn't the sieve.

Anyway, this is indeed fast as long as you have enough memory to handle
it for the range supplied.

It comes in at 1.185 seconds average on this box.

Come to think of it, there is a supposedly highly optimized version of
the sieve in The Python Cookbook that I've never bothered to actually
try out.  Hmmm...



From bj_666 at gmx.net  Thu Nov  9 18:36:33 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 10 Nov 2006 00:36:33 +0100
Subject: Having problems with urlparser concatenation
References: <1163114626.595813.286260@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.09.23.36.32.105528@gmx.net>

In <1163114626.595813.286260 at b28g2000cwb.googlegroups.com>, i80and wrote:

>     return self.open_local_file(url)
>   File "C:\Program Files\Python25\lib\urllib.py", line 465, in
> open_local_file
>     raise IOError(e.errno, e.strerror, e.filename)
> IOError: [Errno 2] The system cannot find the path specified:
> 'en.wikipedia.org\\robots.txt'
> 
> Note the last line 'en.wikipedia.org\\robots.txt'.  I want
> 'en.wikipedia.org/robots.txt'!  What am I doing wrong?

You don't have that file on you local computer.  :-)

If you look at the messages above you'll see there's a function
`open_local_file()` involved.  This function is chosen by `urllib` because
your path looks like a local file, i.e. it lacks the protocol information.
You don't want 'en.wikipedia.org/robots.txt', you want
'http://en.wikipedia.org/robots.txt'!

Ciao,
	Marc 'BlackJack' Rintsch


From sjmachin at lexicon.net  Fri Nov  3 18:45:39 2006
From: sjmachin at lexicon.net (John Machin)
Date: 3 Nov 2006 15:45:39 -0800
Subject: Python Classes and dynamic class members
References: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>
Message-ID: <1162597539.923345.36840@m7g2000cwm.googlegroups.com>

acatejr at gmail.com wrote:
> I have a text file that I am parsing.  Each line is of the form:
>
> max_time  0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
>
> The first item is the field name and the next twelve items are values
> for each month in the year.  There are multiple lines each for some
> different variable.  I am able to parse this data easily enough, but
> what I'd like to do is have a class that stores all this infomormation
> using dynamic member attributes/fields and the resulting list of
> values.  For example, if the class WeatherData was instantiated and I
> parsed the line above as so:
>
> field_name = "max_time;
> values = [0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
>
> how could I get weather data to store values in an attribute called
> "max_time"?  Ultimately, something like this would be possible:
>
> >>>WeatherData.max_time
> >>>[0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]

errrmm, WeatherData is the class, not an instance of the class. See
below.

>
> Any help would be appreciated.

class WeatherData(object):
    pass

# then, for each instance:
    wd = WeatherData()
    # for each line:
        # parse input to obtain field_name and values
        setattr(wd, field_name, values)

HTH,
John



From mdsteele at gmail.com  Fri Nov 10 19:36:57 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 10 Nov 2006 16:36:57 -0800
Subject: Why can't you pickle instancemethods?
References: <1161380004.714778.152080@m7g2000cwm.googlegroups.com>
	<453989E5.9070504@gmail.com>
Message-ID: <1163205417.918078.285970@h48g2000cwc.googlegroups.com>

Steven Bethard wrote:
> Here's the recipe I use::
>
>      [...]
>
> There may be some special cases where this fails, but I haven't run into
> them yet.

Wow, that's a really nice recipe; I didn't even know about the copy_reg
module.  I'll have to start using that.

I did notice one failure mode, however--it doesn't work with methods
named __foo because im_func.__name__ contains the *unmangled* version
of the function name, so when you try to unpickle the method, the try
statement never succeeds and you get an UnboundLocalError on func.

The good news is that I think it can be fixed by mangling the name
manually in _pickle_method(), like so:

def _pickle_method(method):
    func_name = method.im_func.__name__
    obj = method.im_self
    cls = method.im_class
    if func_name.startswith('__') and not func_name.endswith('__'):
        cls_name = cls.__name__.lstrip('_')
        if cls_name: func_name = '_' + cls_name + func_name
    return _unpickle_method, (func_name, obj, cls)



From anthra.norell at vtxmail.ch  Fri Nov  3 13:09:35 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 03 Nov 2006 19:09:35 +0100
Subject: SE
In-Reply-To: <091a01c6ff3e$61d126f0$b82c4fca@csmith>
References: <091a01c6ff3e$61d126f0$b82c4fca@csmith>
Message-ID: <454B85DF.1020400@vtxmail.ch>

C or L Smith wrote:
> Hello,
>
> I'm evaluating different methods of handling a transliteration (from an ascii-based representation of the devanagari/indian script to a romanized representation). I found SE and have been working with it today. One thing that I ran into (that I don't see a reason for right off) is the behavior where a single period just gets eaten and no output is produced:
>
>   
>>>> import SE
>>>> s=SE.SE('.=period')
>>>> s('A.')
>>>>         
> 'Aperiod'
>   
>>>> s('.')
>>>>         
>
> It's not the fact that it's a single character target that is causing the problem:
>
>   
>>>> s=SE.SE('x=y')
>>>> s('x')
>>>>         
> 'y'
>
> I also tried the following:
>
>   
>>>> s=SE.SE('(46)=dot')
>>>> s('A.')
>>>>         
> 'Adot'
>   
>>>> s('.')
>>>>         
>
> Am I missing something?
>
> /chris
>
>
>   

No, you are not missing anything. Quite on the contrary. You caught 
something! Thanks for the report.

Here's the patch:

Line 343 in SEL.py is:  if name == '':

Make it:                if name.replace ('.', '') == '':

In Version 2.2 it's line 338. But Version 2.2 should be phased out anyway.

The problem had to do with the automatic typing of the input data that 
tells string input from file names, which of course are also strings. 
The test is done by os.stat (). If it says an input string is an 
existing file, then that file is translated. Admittedly this is not a 
very robust mechanism. In practice, though, I have never had a problem 
with it, because input data just about never are single words. If names 
of existing files are the object of a translation they would be passed 
all together and be unambiguously recognized as a string. To translate a 
single file name SE is hardly a means of choice, but it could still be 
done if the file name is given a leading space.
   Now, if a single dot (or multiple dots) come along, os.stat does not 
raise an error and that results in a typing error at that point. The 
patch above takes care of that.

Frederic


















From skip at pobox.com  Wed Nov  8 20:58:52 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 19:58:52 -0600
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <4552723b$0$323$e4fe514c@news.xs4all.nl>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
	<eitahh$nov$1@panix3.panix.com>
	<mailman.1928.1163016034.11739.python-list@python.org>
	<87slgt1vmh.fsf@gmail.com> <4552723b$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <17746.35676.873656.909229@montanaro.dyndns.org>


    Irmen> So there. Finally back on the original subject ;-)

And without satisfying Godwin's Law.  Pretty good.

Skip


From paddy3118 at netscape.net  Fri Nov 24 11:27:09 2006
From: paddy3118 at netscape.net (Paddy)
Date: 24 Nov 2006 08:27:09 -0800
Subject: synching with os.walk()
In-Reply-To: <mailman.679.1164383825.32031.python-list@python.org>
References: <mailman.679.1164383825.32031.python-list@python.org>
Message-ID: <1164385629.462106.106120@j72g2000cwa.googlegroups.com>


Andre Meyer wrote:

> Hi all
>
> os.walk() is a nice generator for performing actions on all files in a
> directory and subdirectories. However, how can one use os.walk() for walking
> through two hierarchies at once? I want to synchronise two directories (just
> backup for now), but cannot see how I can traverse a second one. I do this
> now with os.listdir() recursively, which works fine, but I am afraid that
> recursion can become inefficient for large hierarchies.
>
> thanks for your help
> Andr?

Walk each tree individually gathering file names relative to the head
of the tree and modification data.

compare the two sets of data to generate:
 1. A list of what needs to be copied from the original to the copy.
 2. A list of what needs to be copied from the copy to the original

Do the copying.

|You might want to show the user what needs to be done and give them
the option of aborting after generating the copy lists.

- Paddy.



From Wolfram at invalid.invalid  Wed Nov 29 08:33:47 2006
From: Wolfram at invalid.invalid (Wolfram)
Date: Wed, 29 Nov 2006 14:33:47 +0100
Subject: Error handling. Python embedded into a C++ app.
References: <0eoom290nb1m69n36gr97dsm0bn74ora5o@4ax.com>
	<1164767039.835715.162980@l12g2000cwl.googlegroups.com>
Message-ID: <cs2rm21vk5q371bd865volel0ba3aomvm6@4ax.com>

"Eric_Dexter at msn.com" <Eric_Dexter at msn.com> wrote:

>You would use try: and then on the next line except:  

Thanks for the idea, but it did not help. I can not wrap every pythion
line in python, so I wrote the following code on the C++ side:

-------------- snip -----------------
  try
  {
	  int ret = PyRun_SimpleString ( p ) ;
	  if(ret==-1)
	  {
		  ::MessageBox(0, "Error in Python call!", "", 0);
	  }
	  else
	  {
		assert(ret == 0);
	  }
  }
  catch( ...) {
	  ::MessageBox(0, "exception", "", 0 );
  }
-------------- snip -----------------


I call this where "p" is an "execute" of a *.py file containing an
error. I get the "Error in Python call!", but not the "exception".
Any help, including links to information, welcome.


TIA, Wolfram Kuss.


From Maria.Reinhammar at accalon.com  Wed Nov 29 07:27:44 2006
From: Maria.Reinhammar at accalon.com (Maria R)
Date: 29 Nov 2006 04:27:44 -0800
Subject: Processing Solid Edge objects
Message-ID: <1164803264.351803.204720@h54g2000cwb.googlegroups.com>

I consider using Python to process Solid Edge .par .asm etc objects.
Solid Edge provides a pretty rich documentation and tutorials.
Still, when trying it out, using PyWin32, I get somewhat frustrated.

So, I hope for someone out there to be willing to share experiences.

The objective is to automate generation of customer specific machine
elements from project spec's.
In particular, we wish to be able to use .par files as templates and,
by
taking a copy and changing attribute values, instantiate components
to be used in an assembly.
The end result shall be a complete construction structure from which,
among many things, customer doc's drawings and Bill Of Materials are to
be
extracted.
//M



From kib2 at free.fr  Thu Nov 16 10:39:36 2006
From: kib2 at free.fr (tool69)
Date: Thu, 16 Nov 2006 16:39:36 +0100
Subject: ini files and plugins
In-Reply-To: <mailman.262.1163689904.32031.python-list@python.org>
References: <455c7d58$0$21668$426a74cc@news.free.fr>
	<mailman.262.1163689904.32031.python-list@python.org>
Message-ID: <455c848c$0$5418$426a34cc@news.free.fr>

Fredrik Lundh a ?crit :
> "tool69" wrote:
> 
>> 1 -  create a sort of ini file where I can put the user configuration
>> that will load itself on the application startup ;
> 
> http://docs.python.org/lib/module-ConfigParser.html ?
> 
>> 2 -  a simple plugin system with python files ( maybe to add new
>> langages, etc.) ;
> 
> http://effbot.org/zone/import-string.htm ?
> 
> </F> 
> 
> 
> 
Thanks Fredrik, I'll take a look.


From metaperl at gmail.com  Mon Nov  6 11:33:46 2006
From: metaperl at gmail.com (metaperl)
Date: 6 Nov 2006 08:33:46 -0800
Subject: MemoDepot: build YOUR OWN online notes library - anything, anytime,
	anywhere
In-Reply-To: <1162566190.152198.250310@h48g2000cwc.googlegroups.com>
References: <1162566190.152198.250310@h48g2000cwc.googlegroups.com>
Message-ID: <1162830825.945850.274260@e3g2000cwe.googlegroups.com>

I'll just use Plone, thanks.

ompaniess wrote:
> Just like everybody else nowadays, you are facing infinite amount of
> information everyday. how can you keep those that truly matters to you?
> MemoDepot allows you to do just that, and much more!
>
> - Capture any information, store as notes in your MemoDepot account,
> and access from anywhere
> - Organize your notes the way you like, they are always available at
> your fingertips
> - Pinpoint any notes by powerful search, just when you need it
> - Share your notes with others
> - Export your notes to local machine, so you take control, not
> MemoDepot
>
> With MemoDepot, you no longer have to throw away any useful
> information: contacts, ideas, experience, coupons, receipts, pictures,
> web pages, hard Googled-out results, programming sample codes,
> teacher's handout, scientific references, or simply favored book
> passages...... yes, ANYTHING. It is the place to deposit your
> knowledge; it is the way to extend your memory.
>
> MemoDepot is NOT merely a storage solution, a screen scraper, NOR is
> another online notebook, search engine or editor - it is an end to end
> knowledge build and management system, everyday, in the most convenient
> way.
>
> To truly appreciate why MemoDepot tool and service are so powerful,
> take a few minutes to check out:
>
> http://www.memodepot.com/noteserver/flashes/memodepot.pps  (PowerPonit)
>
> http://www.memodepot.com/noteserver/flashes/memodepot_demo.html  (Flash
> Demo)
>
> http://www.memodepot.com (Get started!)
> 
> Any comments or suggestions, send to: support at memodepot.com



From ask at me  Thu Nov  2 00:37:32 2006
From: ask at me (alf)
Date: Wed, 01 Nov 2006 23:37:32 -0600
Subject: need to find out all modules from site-packages
Message-ID: <QLudneBR2oOBGdTYnZ2dnUVZ_vmdnZ2d@comcast.com>

Hi,

I need to find all modules/lib from the site-packages along with the 
versions. Is there a way to determine physical path to the module?

And is there is a way to identify all potential "importable" modules?

-- 
alf


From sjmachin at lexicon.net  Tue Nov 28 02:50:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 27 Nov 2006 23:50:54 -0800
Subject: splitting a long string into a list
In-Reply-To: <1164692082.272978.66720@14g2000cws.googlegroups.com>
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
Message-ID: <1164700254.797849.322590@n67g2000cwd.googlegroups.com>


ronrsr wrote:
> I have a single long string - I'd like to split it into a list of
> unique keywords. Sadly, the database wasn't designed to do this, so I
> must do this in Python - I'm having some trouble using the .split()
> function, it doesn't seem to do what I want it to - any ideas?
>
> thanks very much for your help.
>
> r-sr-
>
>
> longstring = 'Agricultural subsidies; Foreign aidAgriculture;
> Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
[snip most of VERY long string]
> Book);Corporate Reform,  Personhood, Farming (Dem. Book);Crime Rates,
> Legislation, Education;Debt, Credit Cards;'


Hi ronster,

As far as I recall, without digging in the archives:

We would probably agree (if shown the schema) that the database wasn't
designed.  However it seems to have changed. Last time you asked, it
was at least queryable and producing rows, each containing one column
(a string of structure unknown to us and not divulged by you). You were
given extensive advice: how to use split(), plus some questions to
answer about the data e.g. the significance (if any) of semicolon
versus comma. You were also asked about the SQL that was used. You were
asked to explain what you meant by "keywords". All of those questions
were asked so that we could understand your problem, and help you.
Since then, nothing.

Now you have what appears to be something like your previous results
stripped of newlines and smashed together (are the newlines of no
significance at all?), and you appear to be presenting it as a new
problem.

What's going on?

Regards,
John



From vyzasatya at gmail.com  Sun Nov 19 15:28:23 2006
From: vyzasatya at gmail.com (Vyz)
Date: 19 Nov 2006 12:28:23 -0800
Subject: Problem with icon on menubar
Message-ID: <1163968103.802797.49900@m7g2000cwm.googlegroups.com>


I have given icon like this to main frame of my program
        ib=wx.IconBundle()
        ib.AddIconFromFile("SriPadma.ico",wx.BITMAP_TYPE_ANY)
        self.SetIcons(ib

and then I have made binary with py2exe and in setup file mentioned it
as icon resource.

    windows = [
        {
            "script": "SriPadmagui.pyw",
            "icon_resources": [(1, "SriPadma.ico")]
        }

and made an setup.exe and installed the binary i have made.
the first time titlebar icon is recognised but from the next time it
would ask for sripadma.ico

The icon file contains all three sizes required for various things.
16x16 32x32 and 48x48. desktop icon and programs menu icons are working
fine.

Any suggestions are appreciated
Thanks
vyz



From gagsl-py at yahoo.com.ar  Sun Nov 19 22:36:31 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 00:36:31 -0300
Subject: How to make a python file to a DLL or COM object?
In-Reply-To: <1163989866.823548.87430@m73g2000cwd.googlegroups.com>
References: <1163989866.823548.87430@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061120003341.040c0f90@yahoo.com.ar>

At Sunday 19/11/2006 23:31, many_years_after wrote:

>   some one said we can make a python file to an COM object through
>py2exe , but I  haven't got the method. Could any one who knows tell me
>how to do?

Download the win32 extensions and see the examples.
http://sourceforge.net/projects/pywin32/


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From elderic at ish.de  Thu Nov  2 05:38:55 2006
From: elderic at ish.de (elderic)
Date: 2 Nov 2006 02:38:55 -0800
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<mailman.1647.1162462909.11739.python-list@python.org>
Message-ID: <1162463935.685185.286390@b28g2000cwb.googlegroups.com>

Thx =)

Fredrik Lundh schrieb:

> elderic wrote:
>
> > are there other ways than the ones below to check for <type 'function'>
> > in a python script?
> 
> callable(f)
> 
> </F>



From nospam at domain.tld  Fri Nov 10 00:49:54 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Fri, 10 Nov 2006 06:49:54 +0100
Subject: Searching for a module to generate GUI events
References: <eis853$92c$1@kohl.informatik.uni-bremen.de>
	<1162990029.409193.246830@b28g2000cwb.googlegroups.com>
Message-ID: <ej13u2$ps2$1@kohl.informatik.uni-bremen.de>

utabintarbo wrote:

> http://pywinauto.pbwiki.com/ for Win32

Thanks for the hint, looks usable. But it seems, there's nothing for X11 and
MacOSX. I didn't thought, that the problem would be so unusual...

Stephan
 


From cemerick at snowtide.com  Thu Nov 16 06:50:10 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Thu, 16 Nov 2006 06:50:10 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejhdgm$gve$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<ejhdgm$gve$1@sea.gmane.org>
Message-ID: <761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>

Thanks for the comments and thoughts.  I must admit that I have an  
overwhelming feeling of having just stepped into the middle of a  
complex, heated conversation without having heard the preamble.

(FYI, this reply is only an attempt to help those that come  
afterwards -- I'm not looking to advocate much of anything here.)

Fredrik's invocation of the "infoset" term led me to a couple of  
quick searches that clarified the state of play.  Here he sets the  
stage for the .tail behaviour that I originally posted about:

http://effbot.org/zone/element-infoset.htm

And it looks like there have been tussles over other mismatches in  
expectations before, specifically around how namespaces are handled:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/ 
31b2e9f4a8f7338c
http://nixforums.org/ntopic43901.html

 From what I can see, there are more than a few people that have  
stumbled with ElementTree's API because of their preexisting  
expectations, which others have probably correctly bucketed as  
"implementation details".  This comes as quite a shock to those who  
have stumbled (including myself) who have, lo these many years, come  
to view those details as the only standard that matters (perhaps  
simply because those details have been so consistent in our experience).

Which, in my view, is just fine -- different strokes for different  
folks, and all that.  When I originally started poking around the  
python xml world, I was somewhat confused as to why 4suite/Domlette  
existed, as it seemed pretty clear that ElementTree had crystallized  
a lot of mindshare, and has a very attractive API to boot.   
Thankfully, I can now see its appeal, and am very glad it's around,  
as it seems to have all of those comfortable implementation details  
that I've been looking for. :-)

As for the infoset vs. "sequence of piggies" nut: if ElementTree's  
infoset approach is technically correct, then wouldn't it also be  
correct to use a .head attribute instead of a .tail attribute?  Example:

<a>first<b>middle</b>last</a>

might be represented as:

<Element a: head='', text='last'>
     <Element b: head='first', text='middle'>

If I'm wrong, just chalk it up to the fact that this is the first  
time I've ever looked at the Infoset spec, and I'm simply confused.   
If that IS a technically-valid way to represent the above xml  
fragment . . . then I guess I'll make sure to tread more carefully in  
the future around tools that work in infoset terms.  For me, it turns  
out that sequences of piggies really are important, at least in  
contexts where XML is merely a means to an end (either because of the  
attractiveness of the toolsets or because we must cope with what  
we're provided as input) and where consistency with existing tools  
(like those that adhere to DOM level 2/3) and expectations are  
critical.  I think this is what Paul was nodding towards with his  
original response to Stefan's response.

Cheers,

- Chas

On Nov 16, 2006, at 5:11 AM, Fredrik Lundh wrote:

> Paul Boddie wrote:
>
>>> Yes, it is. Just look at the API. It's an attribute of an  
>>> Element, isn't it?
>>> What other API do you know where removing an element from a data  
>>> structure
>>> leaves part of the element behind?
>>
>> I guess it depends on what you regard an element to be...
>
> Stefan said "Element", not "element".
>
> "Element" is a class in the "ElementTree" module, which can be used to
> *represent* an XML element in an XML infoset, including all the data
> *inside* the XML element, and any data *between* that XML element and
> the next one (which is always character data, of course).
>
> It's not very difficult, really; especially if you, as Stefan said,
> think in infoset terms rather "a sequence of little piggies" terms.
>
> </F>


From pierre at saiph.com  Sun Nov 19 13:03:38 2006
From: pierre at saiph.com (Imbaud Pierre)
Date: Sun, 19 Nov 2006 19:03:38 +0100
Subject: tempfile.NamedTemporaryFile wont work
In-Reply-To: <pan.2006.11.19.14.02.10.804394@REMOVE.THIS.cybersource.com.au>
References: <456049ca$0$4692$426a74cc@news.free.fr>
	<4sb0cvFurjq2U1@mid.individual.net>
	<pan.2006.11.19.14.02.10.804394@REMOVE.THIS.cybersource.com.au>
Message-ID: <45609c61$0$4229$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Sun, 19 Nov 2006 13:18:39 +0100, Bjoern Schliessmann wrote:
> 
> 
>>Imbaud Pierre wrote:
>>
>>
>>>             tf = tempfile.NamedTemporaryFile()
>>>             tfName = tf.name
>>>[...]
>>>             print >> sys.stderr, '%s: %s' % (tfName, ['no',
>>>'yes'][os.path.exists(tfName)])
>>>             subprocess.Popen(['strings', tfName])
>>
>>Just out of curiosity: Why did you assign tf.name to tfname?
>>
>>Hypothetically, if tf.name changed, tfname wouldn't follow since
>>strings are immutable.
> 
> 
> Well, yes, but if tf.name changed, that won't change the file name on disk
> either:
> 
> 
>>>>tf = tempfile.NamedTemporaryFile()
>>>>tf.name
> 
> '/tmp/tmpYVV1Ij'
> 
>>>>os.path.exists(tf.name)
> 
> True
> 
>>>>oldname = tf.name
>>>>tf.name = "/tmp/something"
>>>>os.path.exists(tf.name)
> 
> False
> 
>>>>os.path.exists(oldname)
> 
> True
> 
> 
> I'm guessing that binding tf.name to tfName is a micro-optimization.
indeed. And I dont see why tf.name would change.
  In a
> very tight loop, name lookups can take considerable time, and one
> optimization can be to reduce the number of lookups:
> 
> method = something.method
> while 1:
>     something.method # needs at least two lookups
>     method # needs a single lookup
> 
> 



From vinjvinj at gmail.com  Thu Nov 16 13:34:35 2006
From: vinjvinj at gmail.com (vj)
Date: 16 Nov 2006 10:34:35 -0800
Subject: Has anyone generated Open Office Calc XML files from python
In-Reply-To: <1163700905.899704.81920@e3g2000cwe.googlegroups.com>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
	<1163700443.697061.47130@e3g2000cwe.googlegroups.com>
	<1163700905.899704.81920@e3g2000cwe.googlegroups.com>
Message-ID: <1163702075.010225.204970@m73g2000cwd.googlegroups.com>

> Isn't generating CSV output suitable to your needs?
> Python's CSV module makes that very simple - unless you want to include
> images, etc. in the XLS file?

You cannot create multiple worksheets using this method, or apply any
other form of formatting. 

VJ



From prouleau001 at gmail.com  Wed Nov 29 12:53:38 2006
From: prouleau001 at gmail.com (prouleau001 at gmail.com)
Date: 29 Nov 2006 09:53:38 -0800
Subject: Surprise with special floating point values
Message-ID: <1164822818.252321.132680@j72g2000cwa.googlegroups.com>

Hi all,

While trying to use simplejson under Python 2.4.3 I have been
investigating the handling of special floating point values and found
that both Python 2.4 and 2.5 return False when comparing  a NaN with
itself.   Although surprising, I imagine it could also be correct since
NaN is not a number.  But is it correct?

Notice the result of comparing c with itself in the following Python
2.5 session  (it works the same on Python 2.4.3) under Win32::

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> a = 1e300 * 1e300
>>> a
1.#INF
>>> b = 1e66666
>>> b
1.#INF
>>> a == b
True
>>> c = a - a
>>> c
-1.#IND
>>> d = b - b
>>> d
-1.#IND
>>> c == d
False
>>> c == c
False
>>> b == b
True
>>> a == a
True
>>> a is a
True
>>> b is b
True
>>> c is c
True
>>> d is d
True
>>>

Thanks,

--
Pierre Rouleau



From hakonrk at fys.uio.no  Mon Nov 13 08:51:40 2006
From: hakonrk at fys.uio.no (Haakon Riiser)
Date: Mon, 13 Nov 2006 13:51:40 +0000 (UTC)
Subject: httplib continuation packets
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>
	<mailman.2112.1163284210.11739.python-list@python.org>
	<slrnelck6n.lf8.hakonrk@fox.venod.com>
	<mailman.2113.1163286222.11739.python-list@python.org>
	<slrnelco15.m2m.hakonrk@fox.venod.com>
	<mailman.41.1163409854.32031.python-list@python.org>
Message-ID: <slrnelgu3c.npa.hakonrk@localhost.localdomain>

[Steve Holden]

> It really does seem quite bizarre that a server should respond 
> differently to the same TCP request when it is split differently into IP 
> datagrams.
>
> There really is nothing wrong (from a standards point of view) with 
> sending FIN with your last data segment. FIN means "I guarantee to send 
> no more data, and will continue to acknowledge your segments until I see 
> your FIN".

It is the server that sends the FIN.  What happens is this (each
line corresponds to one packet):

  client: POST request headers
  client: POST request body
  server: FIN + ACK

On receiving the FIN + ACK packet, Python gets immediate
end-of-file on the POST request.  Unless the order of the
parameters in the POST request matters (I haven't yet tested this),
I have no other explanation than the fragmentation.  If Ipswitch
bothers to reply to my bug report, I'll look into it.  Otherwise,
I'm not wasting any more time on this -- it's not that big a deal
for me personally, since I have already scripted the stuff I needed
with Perl.

> Are you planning to report this bug to Ipswitch? It certainly sounds 
> like someone should.

I quickly browsed through ipswitch.com, but couldn't find any good
place to submit bugs.  I ended up using the product feedback web
form.  Wrote a one-line summary, and referred to this thread on
Google Groups.

-- 
 Haakon


From lisa.engblom at gmail.com  Mon Nov 27 14:35:15 2006
From: lisa.engblom at gmail.com (lisa.engblom at gmail.com)
Date: 27 Nov 2006 11:35:15 -0800
Subject: python skipping lines?
In-Reply-To: <mailman.778.1164655122.32031.python-list@python.org>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>
	<456B338D.4050408@NOSPAMwit.edu>
	<1164653920.282736.139870@j44g2000cwa.googlegroups.com>
	<mailman.778.1164655122.32031.python-list@python.org>
Message-ID: <1164656115.232834.254910@l39g2000cwd.googlegroups.com>

Thanks, everyone for replying so promptly.  I got it to work the way I
intended, and have some ideas for how to make it much cleaner.

- Lisa



From bj_666 at gmx.net  Sat Nov 18 04:33:17 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 18 Nov 2006 10:33:17 +0100
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.18.09.33.16.488148@gmx.net>

In <1163829271.660193.70450 at j44g2000cwa.googlegroups.com>,
nateastle at gmail.com wrote:

> def Xref(filename):
>     try:
>         fp = open(filename, "r")
>         lines = fp.readlines()
>         fp.close()
>     except:
>         raise "Couldn't read input file \"%s\"" % filename
>     dict = {}
>     for line_num in xrange(len(lines)):

Instead of reading the file completely into a list you can iterate over
the (open) file object and the `enumerate()` function can be used to get
an index number for each line.

>         if lines[line_num] == "":  continue

Take a look at the lines you've read and you'll see why the ``continue``
is never executed.

>         words = lines[line_num].split()
>         for word in words:
>             if not dict.has_key(word):
>                 dict[word] = []
>             if line_num+1 not in dict[word]:
>                 dict[word].append(line_num+1)

Instead of dealing with words that appear more than once in a line you may
use a `set()` to remove duplicates before entering the loop.

Ciao,
	Marc 'BlackJack' Rintsch


From paddy3118 at netscape.net  Fri Nov 24 12:09:38 2006
From: paddy3118 at netscape.net (Paddy)
Date: 24 Nov 2006 09:09:38 -0800
Subject: synching with os.walk()
In-Reply-To: <1164386233.446742.67640@f16g2000cwb.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164385629.462106.106120@j72g2000cwa.googlegroups.com>
	<1164386233.446742.67640@f16g2000cwb.googlegroups.com>
Message-ID: <1164388178.321824.165240@45g2000cws.googlegroups.com>


Paddy wrote:
> P.S. If you are on a Unix type system you can use tar to do the copying
> as you can easily compress the data if it needs to go over a sow link,

Sow links, transfers your data and then may form a tasty sandwich when
cooked.

(The original should, of course, read ...slow...)
- Pad.



From fredrik at pythonware.com  Tue Nov 28 16:51:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 22:51:10 +0100
Subject: How to refer to Python?
In-Reply-To: <9e2f512b0611281348q566dd475xd2f18cf7999180a4@mail.gmail.com>
References: <9e2f512b0611281348q566dd475xd2f18cf7999180a4@mail.gmail.com>
Message-ID: <ekib0d$ecj$1@sea.gmane.org>

Sebastian Bassi wrote:

> I am writing a paper where I refer to Python. Is there a paper that I
> can refer the reader to? Or just use the Python web page as a
> reference?

http://effbot.org/pyfaq/are-there-any-published-articles-about-python-that-i-can-reference.htm

</F>



From kevin.dahlhausen at gmail.com  Wed Nov  1 16:21:58 2006
From: kevin.dahlhausen at gmail.com (kpd)
Date: 1 Nov 2006 13:21:58 -0800
Subject: Remote Objects via CGI?
In-Reply-To: <mailman.1619.1162413835.11739.python-list@python.org>
References: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>
	<4qrto9FnvnaqU1@uni-berlin.de>
	<1162413520.985353.272940@e64g2000cwd.googlegroups.com>
	<mailman.1619.1162413835.11739.python-list@python.org>
Message-ID: <1162416118.124878.281690@i42g2000cwa.googlegroups.com>

Thanks Fredrik.  I gave XmlRpc a shot as you implied earlier.

It works like a charm.  This is how I tested quickly locally without a
large web-server installed:

1. Run cgiserver.py - this takes the place of the normal web server.
2. Then run test.py to make a local xmlrpc call.


./cgi-bin/xmlrpcserver.py:
from SimpleXMLRPCServer import CGIXMLRPCRequestHandler
def test( theList ):
    return len(theList)

server = CGIXMLRPCRequestHandler()
server.register_function(test)
server.handle_request()

./test.py:
from xmlrpclib import ServerProxy, Error
server = ServerProxy("http://localhost:8080/cgi-bin/xmlrpcserver.py")
theList = [ 1.1, 2.2, 3.3, 4.4 ]
print server.test( theList )

./cgiserver.py:
from BaseHTTPServer import HTTPServer
from CGIHTTPServer import CGIHTTPRequestHandler
serv = HTTPServer(("", 8080), CGIHTTPRequestHandler)
serv.serve_forever()


The code comes from a the python docs and an old list message at
http://mail.python.org/pipermail/tutor/2001-January/003142.html



From lupe at localhost.localdomain  Tue Nov  7 19:30:47 2006
From: lupe at localhost.localdomain (Luis P. Mendes)
Date: Wed, 08 Nov 2006 00:30:47 +0000
Subject: psycopg2 faster way to retrieve last x records
Message-ID: <pan.2006.11.08.00.30.45.56149@localhost.localdomain>

Hi,

I would like to know if there is a better way to do what I'm already doing
as stated in the following example, when using psycopg2 with PostgresQL.
.......................
nr_bars_before = 200
tabela = 'seconds'
sqlString = "SELECT * FROM " + tabela + " ORDER BY tempounix;"
curs = self.conn.cursor()
curs.execute(sqlString)
try:
	while 1:
	curs.scroll(1,mode='relative')
except: pass
curs.scroll(-int(math.fabs(nr_bars_before)),mode='relative')
row = curs.fetchone()
curs.close()
.......................

What I need is to get the last 200
records from the table, each couple minutes.  As stated,
what I do is to go all the way through the table records until the end,
then going back 200 in order to select all of them (those 200) forward
down to the last one.

But it takes a lot of time to do it.  I mean some seconds.  And it brings
some 'heavy' work on disk.  The table 'seconds' has 540000+ lines right
now. 

Can I do something different in order to have a lighter load on the system
and a quicker response?

Luis P. Mendes


From grante at visi.com  Thu Nov  9 11:14:00 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 09 Nov 2006 16:14:00 -0000
Subject: extract text from a string
References: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>
Message-ID: <12l6ku8ahpave08@corp.supernews.com>

On 2006-11-09, boris.smirnov at gmail.com <boris.smirnov at gmail.com> wrote:
> Hallo all,
>
> I have tried for a couple of hours to solve my problem with re but I
> have no success.
>
> I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
> become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
> code of how to extract this text from that string?

>>> s = "+abc_cde.fgh_jkl\n"
>>> s[1:-1]
'abc_cde.fgh_jkl'

-- 
Grant Edwards                   grante             Yow!  ... I think I'm
                                  at               having an overnight
                               visi.com            sensation right now!!


From robert.kern at gmail.com  Mon Nov 13 15:30:47 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 13 Nov 2006 14:30:47 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558D443.1030802@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>
	<4558D443.1030802@hobbshouse.org>
Message-ID: <ejakm2$44p$1@sea.gmane.org>

Michael Hobbs wrote:
> In the end, I have to admit that I really couldn't give a flying frog if 
> the colon is there or not. It's just a colon, after all. I *was* hoping 
> that I could convince someone to honestly think about it and consider if 
> the colon is really that noticeable. But so far, the only response that 
> I've received is that there's that ABC study somewhere and that settles 
> that.

Empirical usability research carries a lot of weight. Certainly more so than
projection of personal preferences.

But for what it's worth, my personal preference is that having the colon is more
readable. Yours isn't. That's fine. Debating on that basis, however, is pretty
pointless.

-- 
Robert Kern

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



From __peter__ at web.de  Tue Nov 28 03:59:24 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 09:59:24 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
Message-ID: <ekgto0$khn$02$1@news.t-online.com>

Peter Otten wrote:

> HYRY wrote:
> 
>> I want to join two mono wave file to a stereo wave file by only using
>> the default python module.
>> Here is my program, but it is much slower than the C version, so how
>> can I increase the speed?
>> I think the problem is at line #1, #2, #3.
> 
>> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
> 
> ITEMSIZE = 2
> size = ITEMSIZE*(len(larray) + len(rarray))
> oarray = array.array("h")
> oarray.fromstring("\0" * size)
> 
> may be a bit faster.

Confirmed:

$ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
array("h"); a.fromstring("\0"*(2*N))'
100 loops, best of 3: 9.68 msec per loop
$ python2.5 -m timeit -s'from array import array; N = 10**6' 'a = array("h",
[0]*N);'
10 loops, best of 3: 199 msec per loop

Peter



From jspeis at gmail.com  Fri Nov 17 06:59:08 2006
From: jspeis at gmail.com (Jon)
Date: 17 Nov 2006 03:59:08 -0800
Subject: pyserial port connection problem
Message-ID: <1163764748.744393.130660@m7g2000cwm.googlegroups.com>

Hi,

I wrote some code to read in info from a port using pyserial. the code
reads info sent by a box that is connected to my computer by an
rs232-to usb adapter. When I was writing the code and testing it on my
computer it worked fine.
I ran py2exe on the program (which uses wxpython for its gui) and sent
the output from the py2exe to another computer. now when I try to run
it on this other computer it fails to open the port. it gives the error
that it cannot createfile. the code I'm using to connect is the same as
it is when it worked on my computer.
I do notice that pyserial sees this port on the other computer as
\\\\.\\COM14 - while windows device manager displays it as COM14.
On the other computer the data is properly displayed in Hyperterminal
when opened on COM14.

how can I resolve this issue?

thanks!



From nateastle at gmail.com  Sun Nov 19 12:27:44 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 19 Nov 2006 09:27:44 -0800
Subject: basic python questions
In-Reply-To: <1163933179.896199.122590@k70g2000cwa.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<1163917049.387309.150740@e3g2000cwe.googlegroups.com>
	<1163918698.063535.209970@k70g2000cwa.googlegroups.com>
	<1163919035.448029.242580@b28g2000cwb.googlegroups.com>
	<1163933179.896199.122590@k70g2000cwa.googlegroups.com>
Message-ID: <1163957264.107716.80720@h54g2000cwb.googlegroups.com>

I normaly try to be as resourceful as I can. I find that newgroups give
a wide range of answers and solutions to problems and you get a lot
responses to what is the right way to do things and different point of
views about the language that you can't find in help manuals. I also
want to thank everyone for being so helpful in this group, it has been
one of the better groups that I have used.


John Machin wrote:
> Paddy wrote:
> > John Machin wrote:
> >
> >
> > > [Aside] How are you going to explain all this to your instructor, who
> > > may be reading all this right now?
> > >
> >
> > The instructor should be proud!
> > He has managed to do his very first post to a this newsgroup, about a
> > homework question, and do it in the right way. that is no mean feat.
> >
> > - Paddy.
>
> In fact, he may well by now know more than his instructor, and be
> explaining the finer points of Python :-)



From steve at holdenweb.com  Thu Nov  2 15:53:06 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 20:53:06 +0000
Subject: Python in sci/tech applications
In-Reply-To: <eideec$tk8$1@sea.gmane.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<mailman.1677.1162490601.11739.python-list@python.org>	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>
	<eideec$tk8$1@sea.gmane.org>
Message-ID: <eidlpc$qfi$1@sea.gmane.org>

Robert Kern wrote:
> bearophileHUGS at lycos.com wrote:
> 
>>Robert Kern:
>>
>>>We distribute mingw set up to do this with our "Enthought
>>>Edition" Python distribution.
>>>http://code.enthought.com/enthon/
>>
>>Sorry, maybe I'm blind but I don't see MinGW listed in that page...
>>Maybe it's included but not listed...
> 
> 
> It's there.
> 
Well I tend to believe you, but Firefox is calling you a liar: a search 
fails at "min".

Do you anticipate a 2.5-based release any time soon?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fuzzyman at gmail.com  Mon Nov 27 15:34:37 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 27 Nov 2006 12:34:37 -0800
Subject: case insensitive dictionary
In-Reply-To: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
Message-ID: <1164659676.942505.174880@l39g2000cwd.googlegroups.com>


John Henry wrote:
> I believe the standard dictionary should be amened to allow the use of
> case insensitive keys - as an option.  I found some work done by others
> to do that at:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/283455
>
> but the problem with that approach is that they lowercase the keys
> immediately when you create the dictionary and so the true identity of
> the key is lost.

A later version of this class does give you access to the original case
:

    http://www.voidspace.org.uk/python/archive.shtml#caseless

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



From carsten at uniqsys.com  Wed Nov 15 12:39:12 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 15 Nov 2006 12:39:12 -0500
Subject: Yield
In-Reply-To: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
Message-ID: <1163612352.3371.51.camel@dot.uniqsys.com>

On Wed, 2006-11-15 at 09:13 -0800, Mateuszk87 wrote:
> Hi.
> 
> may someone explain "yield" function, please. how does it actually work
> and when do you use it?

[There is probably a much better explanation of this somewhere on the
net already, but I feel like writing this out myself.]

"yield" is a keyword. In simple terms, if "yield" appears inside a
function, the function becomes a generator that can return multiple
results.

Consider the following trivial example of a function that calculates the
elements of some sequence and prints each one.

def squares(n):
  for i in range(n):
    print i**2

Now suppose it turns out that in addition to--or instead of--printing
the elements of this sequence, the caller wants to do something
different with them. You could handle this by building a list, and
return the list to the caller to loop over and operate on as they
choose. But if the list is very big, that's not very memory-efficient if
the caller only needs to operate on one element at a time.

This is where yield comes in. If you write this:

def squares(n):
  for i in range(n):
    yield i**2

squares is now a generator function. If you call squares(100), it won't
calculate any sequence elements immediately. It will instead return an
iterator the caller can loop over:

for el in squares(100):
  print el # or do anything else the caller decides

The beauty of this is that you achieve physical separation between
generating elements of a sequence and using them. The generator function
only cares about how to produce the elements, and the caller only cares
about how to use them.

Hope this helps,

Carsten.




From bearophileHUGS at lycos.com  Tue Nov 28 15:08:36 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 28 Nov 2006 12:08:36 -0800
Subject: Modifying every alternate element of a sequence
In-Reply-To: <1164713164.043283.161370@l39g2000cwd.googlegroups.com>
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
	<1164713164.043283.161370@l39g2000cwd.googlegroups.com>
Message-ID: <1164744516.542887.167630@l12g2000cwl.googlegroups.com>

Leo Kislov:
> input[1::2] = [-item for item in input[1::2]]
> If you don't want to do it in-place, just make a copy:
> wanted = input[:]
> wanted[1::2] = [-item for item in wanted[1::2]]

Very nice solution.
I have tried few versions like:
from itertools import imap, islice
from operator import neg
1) data[1::2] = [-el for el in data[1::2]]
2) data[1::2] = map(neg, data[1::2])
3) data[1::2] = imap(neg, data[1::2])
4) data[1::2] = map(neg, islice(data, 1, None, 2))
5) etc.

With Python 2.5 it seems that the n.2 (map + slicing) is the faster.

Bye,
bearophile



From gerard5609 at yahoo.fr  Mon Nov  6 18:13:25 2006
From: gerard5609 at yahoo.fr (gerard5609 at yahoo.fr)
Date: 6 Nov 2006 15:13:25 -0800
Subject: ctypes, python 2.5, WinFunctionType and _as_parameter_
Message-ID: <1162854805.644830.138280@m7g2000cwm.googlegroups.com>

Hello,

how to get at the function address of a WinFunctionType ctypes object ?
With ctypes 1.0, I used just myfunc._as_parameter_ and all was well.
With ctypes 1.0.1, that ships with python 2.5, WinFunctionType has no
longer an _as_parameter_ attribute

Where in the ChangeLog and the documentation is explained how to deal
with this change ?

Thanks in advance,

Gerard



From mike at hobbshouse.org  Mon Nov 13 15:56:15 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 14:56:15 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejakm2$44p$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>	<4558D443.1030802@hobbshouse.org>
	<ejakm2$44p$1@sea.gmane.org>
Message-ID: <4558DBEF.8010409@hobbshouse.org>

Robert Kern wrote:
> Michael Hobbs wrote:
>   
>> In the end, I have to admit that I really couldn't give a flying frog if 
>> the colon is there or not. It's just a colon, after all. I *was* hoping 
>> that I could convince someone to honestly think about it and consider if 
>> the colon is really that noticeable. But so far, the only response that 
>> I've received is that there's that ABC study somewhere and that settles 
>> that.
>>     
>
> Empirical usability research carries a lot of weight. Certainly more so than
> projection of personal preferences.
>   

Yes, but all we have is a passing mention of it in the FAQ. If someone 
could actually find the full content of the study and show that it is 
[still] relevant to Python, I'd give it a lot of weight too. As it 
stands, I've become far too jaded by so-called "studies" (both technical 
and medical) to accept them on blind faith.

> But for what it's worth, my personal preference is that having the colon is more
> readable. Yours isn't. That's fine. Debating on that basis, however, is pretty
> pointless.
>   

True enough. Although, I have to ask how many times you define a new 
function only to have Python spit a syntax error out at you saying that 
you forgot a colon. It happens to me all the time. (Usually after an 
"else") If you'd never notice that the colon was missing if the compiler 
didn't point it out, is it really that readable? For me, I tend to get 
annoyed at language "features" that I'm constantly tripping over.

- Mike



From spe.stani.be at gmail.com  Wed Nov 29 14:31:27 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 29 Nov 2006 11:31:27 -0800
Subject: SPE refuses.
In-Reply-To: <mailman.846.1164826327.32031.python-list@python.org>
References: <mailman.846.1164826327.32031.python-list@python.org>
Message-ID: <1164828687.755193.4900@l39g2000cwd.googlegroups.com>

If wxPython is rightly installed, which means that "import wx" works
fine and "wx.VERSION" gives the right version, you can ignore the
wxPython warning.

Please cd do your site-packages directory and do "python SPE.py
--debug" and see the error message.

Stani

On 29 nov, 19:51, egbert <egbert.bouw... at hccnet.nl> wrote:
> According to apt-show-versions I have installed:
>     python-wxgtk2.6 2.6.3.2.1.5
>     spe 0.8.2a+repack-1
>
> However when I start SPE I get the message
> You need to install at least wxPython v2.5.4.1 to run SPE
>
> How do I tell SPE that I have the right wxPython ?
> e.
> --
> Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
> ========================================================================



From gagsl-py at yahoo.com.ar  Thu Nov 16 19:26:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 21:26:42 -0300
Subject: Writing to Registry
In-Reply-To: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
References: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
Message-ID: <7.0.1.0.0.20061116212056.03f4cd18@yahoo.com.ar>

At Thursday 16/11/2006 20:48, Samantha wrote:

>I am working with this recipes:
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66011
>
>The problem I am having is setting a hex value.
>This line ---   SetValueEx(aKey,"MyNewKey",0, REG_SZ,
>r"c:\winnt\explorer.exe")
>I want something Like --   SetValueEx(aKey,"MyNewSize",0, REG_SZ, 120 or
>some value)

Usually when you don't know how to use a certain function, you begin 
by reading the documentation for it:
http://docs.python.org/lib/module--winreg.html#l2h-5827


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Fri Nov 17 02:00:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 08:00:25 +0100
Subject: popen(1-4) as a seperate process
In-Reply-To: <455D3F18.40902@al.com.au>
References: <455D3F18.40902@al.com.au>
Message-ID: <ejjmm8$q90$1@sea.gmane.org>

Astan Chee wrote:

> Im trying to popen (or more specifically os.popen4() ) from wxPython. 
> I've read the documentation on popen and it says I can do a popen as a 
> seperate process or popen not as a child process

where does it say that?  afaik, the whole point of the popen API is to 
run an external process and use pipes to communicate with it.

</F>



From shuanyu at gmail.com  Sun Nov 19 21:31:06 2006
From: shuanyu at gmail.com (many_years_after)
Date: 19 Nov 2006 18:31:06 -0800
Subject: How to make a python file to a DLL or COM object?
Message-ID: <1163989866.823548.87430@m73g2000cwd.googlegroups.com>

Hi:

  some one said we can make a python file to an COM object through
py2exe , but I  haven't got the method. Could any one who knows tell me
how to do?

Thanks



From lisa.engblom at gmail.com  Mon Nov 27 13:58:40 2006
From: lisa.engblom at gmail.com (lisa.engblom at gmail.com)
Date: 27 Nov 2006 10:58:40 -0800
Subject: python skipping lines?
In-Reply-To: <456B338D.4050408@NOSPAMwit.edu>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>
	<456B338D.4050408@NOSPAMwit.edu>
Message-ID: <1164653920.282736.139870@j44g2000cwa.googlegroups.com>

thats easy enough to solve

"""test text.py
for playing around with my text editing task
"""

UnitList = open('/Python25/working/FacList.txt', 'r')
RawData = open('/Python25/working/data.txt', 'r')
Output = open('/Python25/working/output.txt', 'a')

def PullHourlyData(filename, facility, unit):
        for line in filename:
                data = line.split('","')
                CurrentFacility = data[1]
                CurrentUnit = data[3]
                CurrentSO2Mass = data[9]            #in lb/hour
                #print CurrentFacility
                #print CurrentUnit

                if facility == CurrentFacility and unit == CurrentUnit:

                        #print >> Output, '"%s", "%s", "%s"' %
(CurrentFacility, CurrentUnit, CurrentSO2Mass)
                        print '"%s", "%s", "%s"' % (CurrentFacility,
CurrentUnit, CurrentSO2Mass)
                else:
                        print facility
                        print unit
                        print CurrentFacility
                        print CurrentUnit
                        print "\n"


counter = 0

for combos in UnitList:
        print counter
        FandU = combos.split('","')
        #print combos
        FacilityName = FandU[0]
        UnitName = FandU[1]
        #print FacilityName
        #print UnitName
        FacilityName = FacilityName.strip('"')
        UnitName = UnitName.strip('",\n')
        print FacilityName
        print UnitName

        PullHourlyData(RawData, FacilityName, UnitName)
        counter += 1


UnitList.close()
RawData.close()
Output.close()
print "Done!"

Jordan Greenberg wrote:
> lisa.engblom at gmail.com wrote:
> > Hi,
> <SNIP>
> > Any ideas of what could be the problem?
> >
>
> Hard to say without seeing your code.
>
> Jordan Greenberg
> 
> -- 
> Posted via a free Usenet account from http://www.teranews.com



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 10 19:48:57 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 11 Nov 2006 11:48:57 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<mailman.2044.1163176635.11739.python-list@python.org>
Message-ID: <pan.2006.11.11.00.48.57.493691@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 10:37:08 -0600, Michael Hobbs wrote:

> The FAQ says that the colon increases 
> readability, but I'm skeptical. The indentation seems to provide more 
> than enough of a visual clue as to where the if conditional ends.

and then in a later post:
> Like I said in that paragraph, removing the colon wouldn't seem to 
> degrade readability *that much*, if at all.

A little bit of skepticism is a wonderful thing, but in this particular
case, your "seems to provide" and "wouldn't seem to" are beaten quite
comprehensibly by the actual usability testing performed by the ABC
Project. (See Robert Kern's post earlier in this thread.)

The world seems to be flat, the sun appears to rotate around the Earth,
and mushrooms look like they are more closely related to plants than to
animals, but none of these things are actually the case.

When you've done your own usability testing, comparable to that already
done, then please feel free to let us know whether the evidence matches
your intuitions.


-- 
Steven.



From robin at NOSPAMreportlab.com  Sat Nov 11 03:52:57 2006
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sat, 11 Nov 2006 08:52:57 +0000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <mailman.2077.1163205663.11739.python-list@python.org>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>	<45533D9F.5020002@chamonix.reportlab.co.uk>	<mailman.2001.1163109689.11739.python-list@python.org>	<4553AEA9.5040902@jessikat.plus.net>	<45545332.7090208@chamonix.reportlab.co.uk>
	<mailman.2077.1163205663.11739.python-list@python.org>
Message-ID: <45558F69.3010404@jessikat.plus.net>

Andrew MacIntyre wrote:
....
>> I guess the freebsd limits  must be different to the original 
>> development environment.
> 
> The number of semaphores is certainly tunable - the SYSV IPC KERNEL 
> PARAMETERS section in the file /usr/src/sys/conf/NOTES lists the SYSV
> semaphore parameters that can be set in the kernel config.
> 

yes those limits look pretty low. I think POSH grabs 60 the first time 
and then fails the second as the limit appears to be 61. I wonder what 
the actual cost is of having lots of semaphores.
-- 
Robin Becker


From Zeynep.Gerek at asu.edu  Thu Nov  2 13:51:35 2006
From: Zeynep.Gerek at asu.edu (Zeynep Gerek)
Date: Thu, 2 Nov 2006 11:51:35 -0700
Subject: problem with svd in numpy
Message-ID: <A67B3032D1498942AFF8CEAF1ADE29E3F84F6F@EX02.asurite.ad.asu.edu>

Hello,
I am having weird problem with svd routine in python. I am comparing
eigenvector values from python and matlab. And they are giving different
values. Actually, they are same but python gives negative values of
these numbers.
 
This is my test program (I am dealing with 100x100 matrices) with the
array I used in matlab.
 
from numpy import*
a=zeros((10,10))
a=array([
[6,-1,-1,-1,-1,-1,-1,0,0,0],
[-1,7,-1,-1,-1,-1,-1,-1,0,0],
[-1,-1,7,-1,-1,-1,-1,-1,0,0],
[-1,-1,-1,6,-1,-1,-1,0,0,0],
[-1,-1,-1,-1,6,-1,-1,0,0,0],
[-1,-1,-1,-1,-1,8,-1,-1,-1,0],
[-1,-1,-1,-1,-1,-1,9,-1,-1,-1],
[0,-1,-1,0,0,-1,-1,6,-1,-1],
[0,0,0,0,0,-1,-1,-1,4,-1],
[0,0,0,0,0,0,-1,-1,-1,3]])   
u,w,vt = linalg.svd(a)
print u
 
Output:
u
array([[ -1.05409255e-01,   1.48045079e-01,  -2.22322513e-01,
          3.54544091e-15,   3.70413913e-01,  -7.27640158e-01,
          2.60327955e-01,   1.08243955e-01,  -2.67189407e-01,
          3.16227766e-01],
       [ -1.05409255e-01,   8.51968962e-02,   5.37745352e-01,
          7.07106781e-01,   4.44089210e-16,   3.88578059e-15,
         -2.31331268e-01,   4.16676907e-02,  -1.92898838e-01,
          3.16227766e-01],
       [ -1.05409255e-01,   8.51968962e-02,   5.37745352e-01,
         -7.07106781e-01,  -1.06858966e-15,  -3.05311332e-15,
         -2.31331268e-01,   4.16676907e-02,  -1.92898838e-01,
          3.16227766e-01],
       [ -1.05409255e-01,   1.48045079e-01,  -2.22322513e-01,
         -3.52416288e-15,   4.44947906e-01,   6.84607937e-01,
          2.60327955e-01,   1.08243955e-01,  -2.67189407e-01,
          3.16227766e-01],
       [ -1.05409255e-01,   1.48045079e-01,  -2.22322513e-01,
          1.16652940e-15,  -8.15361818e-01,   4.30322209e-02,
          2.60327955e-01,   1.08243955e-01,  -2.67189407e-01,
          3.16227766e-01],
       [ -1.05409255e-01,  -9.20330077e-01,  -1.07260256e-01,
          1.88817436e-15,   1.11022302e-16,  -3.33066907e-16,
         -4.57953818e-02,  -1.32746681e-01,  -1.03236512e-01,
          3.16227766e-01],
       [  9.48683298e-01,   7.14706072e-16,  -1.04777298e-15,
          3.61617704e-16,  -8.32667268e-17,  -1.52655666e-16,
         -2.08166817e-16,  -9.36750677e-17,   1.42247325e-16,
          3.16227766e-01],
       [ -1.05409255e-01,   2.15015734e-01,  -4.92200980e-01,
         -1.55431223e-15,   4.85722573e-16,  -2.77555756e-16,
         -7.46027799e-01,  -1.27670308e-01,   1.65946178e-01,
          3.16227766e-01],
       [ -1.05409255e-01,   1.51153561e-01,   1.21762878e-01,
          1.66533454e-15,   1.80411242e-16,   3.46944695e-16,
          3.33969907e-01,  -7.50787335e-01,   4.19520882e-01,
          3.16227766e-01],
       [ -1.05409255e-01,  -6.03682488e-02,   6.91751920e-02,
         -1.23512311e-15,  -2.28983499e-16,   2.08166817e-17,
          1.39531945e-01,   6.03137078e-01,   7.05135347e-01,
          3.16227766e-01]])
 
Matlab output:
 
u =
 
    0.1054   -0.1480    0.2223   -0.0000    0.0000    0.8165    0.2603
0.1082   -0.2672    0.3162
    0.1054   -0.0852   -0.5377    0.7071   -0.0000   -0.0000   -0.2313
0.0417   -0.1929    0.3162
    0.1054   -0.0852   -0.5377   -0.7071    0.0000   -0.0000   -0.2313
0.0417   -0.1929    0.3162
    0.1054   -0.1480    0.2223   -0.0000   -0.7071   -0.4082    0.2603
0.1082   -0.2672    0.3162
    0.1054   -0.1480    0.2223    0.0000    0.7071   -0.4082    0.2603
0.1082   -0.2672    0.3162
    0.1054    0.9203    0.1073    0.0000    0.0000   -0.0000   -0.0458
-0.1327   -0.1032    0.3162
   -0.9487    0.0000   -0.0000    0.0000   -0.0000   -0.0000   -0.0000
0.0000    0.0000    0.3162
    0.1054   -0.2150    0.4922    0.0000    0.0000    0.0000   -0.7460
-0.1277    0.1659    0.3162
    0.1054   -0.1512   -0.1218   -0.0000   -0.0000   -0.0000    0.3340
-0.7508    0.4195    0.3162
    0.1054    0.0604   -0.0692    0.0000    0.0000   -0.0000    0.1395
0.6031    0.7051    0.3162
 
I am not sure if svd in numpy has a problem or not. When I test this
matrix in matlab, eigenvector values are different, Any idea why I am
not getting exact results from both program?
Any input will be appreciated. 
 
Best,
Nevin
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From fredrik at pythonware.com  Sat Nov 18 05:27:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 11:27:50 +0100
Subject: basic python questions
In-Reply-To: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
Message-ID: <ejmn76$jap$1@sea.gmane.org>

nateastle at gmail.com wrote:

> I have a simple assignment for school but am unsure where to go. The
> assignment is to read in a text file, split out the words and say which
> line each word appears in alphabetical order. I have the basic outline
> of the program done which is:

looks like an excellent start to me.

> def Xref(filename):
>     try:
>         fp = open(filename, "r")
>         lines = fp.readlines()
>         fp.close()
>     except:
>         raise "Couldn't read input file \"%s\"" % filename
>     dict = {}
>     for line_num in xrange(len(lines)):
>         if lines[line_num] == "":  continue
>         words = lines[line_num].split()
>         for word in words:
>             if not dict.has_key(word):
>                 dict[word] = []
>             if line_num+1 not in dict[word]:
>                 dict[word].append(line_num+1)
>     return dict
> 
> My question is, how do I easily parse out punction marks

it depends a bit how you define the term "word".

if you're using regular text, with a limited set of punctuation 
characters, you can simply do e.g.

     word = word.strip(".,!?:;")
     if not word:
         continue

inside the "for word" loop.  this won't handle such characters if they 
appear inside words, but that's probably good enough for your task.

another, slightly more advanced approach is to use regular expressions, 
such as re.findall("\w+") to get a list of all alphanumeric "words" in 
the text.  that'll have other drawbacks (e.g. it'll split up words like 
"couldn't" and "cross-reference", unless you tweak the regexp), and is 
probably overkill.

and how do I sort the list and

how to sort the dictionary when printing the cross-reference, you mean? 
    just use "sorted" on the dictionary; that'll get you a sorted list 
of the keys.

     sorted(dict)

to avoid duplicates and simplify sorting, you probably want to normalize 
the case of the words you add to the dictionary, e.g. by converting all 
words to lowercase.

 > if there anything else that I am doing wrong in this code

there's plenty of things that can be tweaked and tuned and written in a 
slightly shorter way by an experienced Python programmer, but assuming 
that this is a general programming assignment, I don't see something 
seriously "wrong" in your code (just make sure you test it on a file 
that doesn't exist before you hand it in)

</F>



From Leo.Kislov at gmail.com  Fri Nov 17 04:27:01 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 17 Nov 2006 01:27:01 -0800
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <1163753642.836452.294300@h54g2000cwb.googlegroups.com>
References: <mailman.277.1163700699.32031.python-list@python.org>
	<1163753642.836452.294300@h54g2000cwb.googlegroups.com>
Message-ID: <1163755621.032961.25800@b28g2000cwb.googlegroups.com>

Leo Kislov wrote:
> CUPS only have command line interface:
> <http://www.cups.org/documentation.php/options.html>

My mistake: CUPS actually has official C API
<http://www.cups.org/documentation.php/api-cups.html> and unofficial
python bindings <http://freshmeat.net/projects/pycups/>.



From sjmachin at lexicon.net  Fri Nov 17 04:18:26 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 01:18:26 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
Message-ID: <1163755106.033233.147900@e3g2000cwe.googlegroups.com>


John Henry wrote:
> I am just wondering what's with get_close_matches() in difflib.  What's
> the magic?   How fuzzy do I need to get in order to get a match?

Are you desperate to understand the inner workings of difflib, or do
you want merely to do some fuzzy matching of strings using a well-known
somewhat-more-understandable zillions-of-implementations metric?

If the latter, google "Levenshtein distance" for the metric, and
"Python Levenshtein" -- first hit  for me is an implementation in a
Python C-extension. If you don't have the ability to compile a C
extension, or don't need the speed, there should be a few pure-Python
versions around; I'm specifically aware of one by Magnus Lie Hetland.
It's less than a screenful of code; good idea to grab it anyway for
educational purposes -- a quite Pythonic implementation of the
traditional algorithm.

HTH,
John



From mystilleef at gmail.com  Sat Nov  4 14:00:13 2006
From: mystilleef at gmail.com (mystilleef)
Date: 4 Nov 2006 11:00:13 -0800
Subject: ANNOUNCE: Scribes 0.3 Released
Message-ID: <1162666812.965072.263560@k70g2000cwa.googlegroups.com>

I am pleased to release version 0.3 of Scribes. Scribes is a text
editor that uniquely balances simplicity with power. This release is a
significant milestone in providing you with an enjoyable text editing
experience. Bugs were squashed, new features implemented, countless
enhancements made and numerous performance optimizations tweaked. It is
strongly recommended that you upgrade to the new version.

release note: http://scribes.sourceforge.net/release-note-0-3.html

Flash Demo: http://scribes.sf.net/demo.htm

GIF Demo: http://www.minds.may.ie/~dez/images/blog/scribes.html

download: http://scribes.sf.net/download.html

templates: http://scribes.sf.net/templates.tar.bz2

website: http://scribes.sf.net/

donate: http://scribes.sf.net/donate.html



From stuart at stuartbishop.net  Tue Nov  7 20:03:17 2006
From: stuart at stuartbishop.net (Stuart Bishop)
Date: Tue, 07 Nov 2006 17:03:17 -0800
Subject: psycopg2 faster way to retrieve last x records
In-Reply-To: <pan.2006.11.08.00.30.45.56149@localhost.localdomain>
References: <pan.2006.11.08.00.30.45.56149@localhost.localdomain>
Message-ID: <45512CD5.8020801@stuartbishop.net>

Luis P. Mendes wrote:
> Hi,
> 
> I would like to know if there is a better way to do what I'm already doing
> as stated in the following example, when using psycopg2 with PostgresQL.
> .......................
> nr_bars_before = 200
> tabela = 'seconds'
> sqlString = "SELECT * FROM " + tabela + " ORDER BY tempounix;"
> curs = self.conn.cursor()
> curs.execute(sqlString)
> try:
> 	while 1:
> 	curs.scroll(1,mode='relative')
> except: pass
> curs.scroll(-int(math.fabs(nr_bars_before)),mode='relative')
> row = curs.fetchone()
> curs.close()
> .......................
> 
> What I need is to get the last 200
> records from the table, each couple minutes.  As stated,
> what I do is to go all the way through the table records until the end,
> then going back 200 in order to select all of them (those 200) forward
> down to the last one.
> 
> But it takes a lot of time to do it.  I mean some seconds.  And it brings
> some 'heavy' work on disk.  The table 'seconds' has 540000+ lines right
> now. 

The following SQL statement will return the last 200 rows in reverse order:

SELECT * FROM seconds ORDER BY tempounix DESC LIMIT 200

This will only send 200 rows from the server to the client (your existing
approach will send all of the rows). Also, if you have an index on tempounix
it will be really fast.


If you really need the results in tempounix order, then:

SELECT * FROM (
    SELECT * FROM seconds ORDER BY tempounix DESC LIMIT 200
    ) AS whatever
ORDER BY tempounix;


-- 
Stuart Bishop <stuart at stuartbishop.net>
http://www.stuartbishop.net/

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From arkanes at gmail.com  Mon Nov 27 09:28:15 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 27 Nov 2006 08:28:15 -0600
Subject: How good is CORBA?
In-Reply-To: <m2zmagwn09.fsf@ordesa.lan>
References: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
	<45634A59.5080501@wiggly.org>
	<mailman.547.1164135389.32031.python-list@python.org>
	<m2zmagwn09.fsf@ordesa.lan>
Message-ID: <4866bea60611270628g1c9d32b5ubb931188f0f9379d@mail.gmail.com>

On 11/24/06, Piet van Oostrum <piet at cs.uu.nl> wrote:
> >>>>> "Chris Mellon" <arkanes at gmail.com> (CM) wrote:
>
> >CM> FYI: Ice is available under the GPL, so if by "pay" you mean "pay
> >CM> money" that's not your only option. You can also get a commercial
> >CM> license, similiar to Qt.
>
> >CM> I like Ice a lot, it's got hardly any of the ramp up time and learning
> >CM> curve that CORBA does, and it's extremely efficent. If GPL or cash are
> >CM> acceptable licensing options to you, then I encourage you to use it
> >CM> before you head to CORBA.
>
> OmniORB's author did some benchmarking and it appeared that omniORB was
> faster than Ice.

Nowhere did I say that Ice was faster than any given CORBA
implementation. People who want to do benchmark shootouts are on their
own. Ice is quick to learn, easy to use, and fast on the wire. That's
a good step up over CORBA to me.

> --
> Piet van Oostrum <piet at cs.uu.nl>
> URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
> Private email: piet at vanoostrum.org
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steve at holdenweb.com  Thu Nov  9 13:31:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Nov 2006 12:31:34 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163092617.499298.326930@f16g2000cwb.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1985.1163092232.11739.python-list@python.org>
	<1163092617.499298.326930@f16g2000cwb.googlegroups.com>
Message-ID: <eivs3t$fqo$1@sea.gmane.org>

Paul Boddie wrote:
> Steve Holden wrote:
>> Paul Boddie wrote:
>>> http://www.python.org/doc/faq/general/#why-are-colons-required-for-the-if-while-def-class-statements
>>>
>> I suppose it would be even better if that hyperlink actually took you to
>>   section 1.4.27 rather than 1.4.14 ...
> 
> I'd suggest a browser upgrade: even the old version of Konqueror I'm
> using here manages to scroll to the right place. And it isn't a Web
> site maintenance problem, either, although I did have my suspicions.
> 
YTes, IE copes with it but Firefox doesn't. Having heard a number of 
complaints about Firefox 2 I'm tempted to stick with 1.5.0.8 just a 
little longer.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From emin.shopper at gmail.com  Fri Nov  3 09:19:39 2006
From: emin.shopper at gmail.com (emin.shopper at gmail.com)
Date: 3 Nov 2006 06:19:39 -0800
Subject: emacs shell hangs on W32 with python
References: <1162508249.399337.233170@m73g2000cwd.googlegroups.com>
	<uu01hko4n.fsf@rkspeed-rugby.dk>
Message-ID: <1162563579.312620.247480@b28g2000cwb.googlegroups.com>

Hmm, it doesn't even work if I run the cygwin version of GNU Emacs and
have it start the Windows version of python through python-mode or if I
start a shell in emacs and then start the Windows version of python
through the shell. Interestingly, however, things DO seem to work if I
use cygwin emacs with cygwin python (version 2.4.1).

I wonder if the windows version of Tkinter does something weird such as
implicitly calling Tk.mainloop()...

Any help would be much appreciated.

Brian Elmegaard wrote:
> emin.shopper at gmail.com writes:
>
> > Is there any way to run python through emacs or xemacs without having
> > it hang or is shell support broken?
>
> Doing it from eshell gives the same problem :-(
> --
> Brian (remove the sport for mail)
> http://www.et.web.mek.dtu.dk/Staff/be/be.html
> Rugbyklubben Speed Scandinavian Open 7s Rugby http://www.rkspeed.dk



From scott.daniels at acm.org  Sun Nov 12 20:14:51 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 12 Nov 2006 17:14:51 -0800
Subject: Why does this code crash python?
In-Reply-To: <1163292486.423157.316390@m7g2000cwm.googlegroups.com>
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<eYs5h.5470$L6.744@newsread3.news.pas.earthlink.net>
	<1163292486.423157.316390@m7g2000cwm.googlegroups.com>
Message-ID: <4557be00$1@nntp0.pdx.net>

Mythmon at gmail.com wrote:
>...

>>>             if float(seconds[0]) < 10: seconds[0] = '0' +
>>> seconds[0][:-1]
>>>             if float(seconds[1]) < 10: seconds[1] = '0' +
>>> seconds[1][:-1]        I've not handled leading 0s on the seconds field (I tried, but can't
>> figure out how to specify zero-filled field width for floats -- works
>> for integers)
> 
> I ran into the same problem, thats why I did it the way I did, instead
> of continuing to wrestle with python's string formatting.

For this portion, you could quite simply:

      totalsecs = int(whatever)
      print '%02d:%02d' % divmod(totalsecs, 60)

Or, depending on your leading zero requirements:

      totalsecs = int(whatever)
      print '%2d:%02d' % divmod(totalsecs, 60)

--Scott David Daniels
scott.daniels at acm.org


From writeson at charter.net  Sun Nov  5 22:27:11 2006
From: writeson at charter.net (writeson)
Date: 5 Nov 2006 19:27:11 -0800
Subject: Pyro stability
In-Reply-To: <454dd84b$0$328$e4fe514c@news.xs4all.nl>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
Message-ID: <1162783631.291535.221530@f16g2000cwb.googlegroups.com>

Irmen,

Thanks, you're very good about answering Pyro related questions!

Thanks again. I posted a more detailed question to the mailing list
describing as best I could how I want to use Pyro and the questions I
have in regards to the system described.

Doug

Irmen de Jong wrote:
> writeson wrote:
> [some questions about Pyro]
> 
> I've replied to this on Pyro's mailing list.
> -Irmen



From claird at lairds.us  Sun Nov 12 08:36:39 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 12 Nov 2006 13:36:39 +0000
Subject: range syntax
References: <ej23gl$du9$1@sea.gmane.org> <ej2buo$fdo$1@sea.gmane.org>
	<mailman.2097.1163257772.11739.python-list@python.org>
Message-ID: <7kkj24-8uo.ln1@lairds.us>

In article <mailman.2097.1163257772.11739.python-list at python.org>,
Colin J. Williams <cjw at sympatico.ca> wrote:
			.
			.
			.
>Your point about iterators is well taken, but it seems that the range is 
>used sufficiently frequently that some syntactic form would be helpful.
>
>Colin W.
>

A personal reaction:  part of the judgment guiding 
Python now and for some time in the past is a bias
toward NOT "multiplying entities".  I believe Guido
and his lieutenants think in terms of, "if a syntax
*might* be helpful, leave it out; only if it's
compelling/necessary/... do we change the language."

Perhaps you know this already.  In any case, Python
leadership is wary that pursuit of local
optimizations--like your range suggestion--can
damage global prospects for the language.


From tdelaney at avaya.com  Tue Nov 21 18:33:54 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 22 Nov 2006 10:33:54 +1100
Subject: Is time.time() < time.time() always true?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1EBCD@au3010avexu1.global.avaya.com>

Chris Mellon wrote:

> On 21 Nov 2006 15:10:25 -0800, flamesrock <flamesrock at gmail.com>
> wrote: 
>> So, I was blazin' some mad chronix, as they say, and got on to
>> thinking about Python. 
>> 
>> The question was, is the statement:
>> 
>> time.time() < time.time()
>> 
>> always true? Seems it should be false, since the statement itself
>> occurs at one time instant.. but of course we know that python
>> doesn't execute code that way.. So my question is, why doesn't
>> Python work this way? 
>> 
> 
> This would only be false if the time between the 2 calls was less than
> the precision of the OS call that time.time uses.

So long as the clock on the machine it's running on is not set backwards
between the two calls, you can guarantee that

   time.time() <= time.time()

will always evaluate true.

However, it's always possible (though incredibly unlikely) that an
external process changes the clock between the two system calls that are
made.

Tim Delaney


From fredrik at pythonware.com  Fri Nov 17 14:38:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 20:38:47 +0100
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <f81479dd0611171120t7ab9cc06x8d1b7a3eaa3c5161@mail.gmail.com>
References: <mailman.277.1163700699.32031.python-list@python.org>	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>	<ejk7j8$f5t$1@sea.gmane.org>
	<f81479dd0611171120t7ab9cc06x8d1b7a3eaa3c5161@mail.gmail.com>
Message-ID: <ejl34b$odd$1@sea.gmane.org>

krishnakant Mane wrote:

> I can't figure out where is the win32api module in my system.
> I think I need to download it.
> I tried to search but did not find it.

googling for "python win32api" gives you:

     http://sourceforge.net/project/showfiles.php?group_id=78018

among the first few hits.  as for documentation, it's just a binding for 
the win32 api:s, which are extensively documented over at microsoft.com.

</F>



From tim.peters at gmail.com  Sat Nov 18 18:46:54 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 18 Nov 2006 18:46:54 -0500
Subject: syntax error in sum(). Please explicate.
In-Reply-To: <jack-70B2B1.15364718112006@newsclstr02.news.prodigy.com>
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
	<1163889196.135008.126970@h54g2000cwb.googlegroups.com>
	<jack-70B2B1.15364718112006@newsclstr02.news.prodigy.com>
Message-ID: <1f7befae0611181546q69db5da6h4a9233fb491dd578@mail.gmail.com>

[Matt Moriarity]
>> try surrounding your sum argument in brackets:
>>
>> sum([phi(x // ps[i+1], i) for i in range(a)])
>>
>> instead of:
>>
>> sum(phi(x // ps[i+1], i) for i in range(a))

[Michael Press]
> Thank you. That makes it work.

But is a wrong solution ;-)  As others have suggested, it's almost
certainly the case that you were using a too-old version of Python.
2.5 is current, and 2.4.4 (the current bugfix release in the 2.4 line)
would also work.  You must have been using a version before 2.4, and
if you're just starting with Python, it's a Bad Idea to artificially
burden yourself with an old version where current examples can't work
;-)


From sthompson at creativewebnet.com  Fri Nov 24 10:56:38 2006
From: sthompson at creativewebnet.com (Steve Thompson)
Date: Fri, 24 Nov 2006 10:56:38 -0500
Subject: Active State and Komodo...
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
	<1164380976.218515.107780@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.11.24.15.56.30.157992@creativewebnet.com>

On Fri, 24 Nov 2006 07:09:36 -0800, BartlebyScrivener wrote:

> Steve Thompson wrote:
>>
>> I was wondering the differnced there were betwee Active State's python and
>> the open source version of python.
> 
> The biggest difference at the moment is that ActiveState is still using
> Python 2.4.3 in their distribution. They should be coming out with 2.5
> soon.
> 
> Sounds like you are running Suse?  So you already have some version of
> Python, right? You can search this group at comp.lang.python on Google
> Groups--try "python versions linux"--or something like that--but the
> issue you need to watch out for is running two different versions on
> Linux.
> 
> Long and short, you don't want to uninstall the version of Python that
> came with your Suse, because other programs on your machine probably
> use that particular version. It's easy to install an ADDITIONAL
> distribution of Python and run it separately, but again. Search the
> list
> for how to do that, and how to run them separately once you do.
> 
> I'm just moving to Linux myself, so can't provide the expertise. Unless
> there is some killer feature of 2.5 you need, I would just use the
> Python that came with your Suse.
> 
> rd

Thanks BartlebyScrivener, but are there any other IDE's that are better,
in your opinion, than Eric version 3. I'm using gnome and eric is built
for KDE. I don't care it there open source or Id I have tp puchase one.

Thanks again,

Steve


From rickmorrison at gmail.com  Mon Nov 13 20:06:18 2006
From: rickmorrison at gmail.com (ram)
Date: 13 Nov 2006 17:06:18 -0800
Subject: Unpacking sequences and keywords in one function call
Message-ID: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>

Stupid question #983098403:

I can't seem to pass an unpacked sequence and keyword arguments to a
function at the same time. What am I doing wrong?

def f(*args, **kw):
    for a in args:
        print 'arg:', a
    for (k,v) in kw.iteritems():
        print k, '=', v

>>> f(1,2)
arg: 1
arg: 2

>>> f(*[1,2])
arg: 1
arg: 2

>>> f(1,2, a=1)
arg: 1
arg: 2
a = 1

>>> f(*[1,2], a=1)
    File "<stdin>", line 1
      f(*[1,2], a=1)
                  ^
    SyntaxError: invalid syntax 

Thanks,
Rick



From jm.suresh at gmail.com  Fri Nov  3 02:45:20 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 2 Nov 2006 23:45:20 -0800
Subject: Best way to have intermediate object description format
In-Reply-To: <1162536668.321600.171650@h48g2000cwc.googlegroups.com>
References: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
	<1162536668.321600.171650@h48g2000cwc.googlegroups.com>
Message-ID: <1162539920.802607.202610@i42g2000cwa.googlegroups.com>

Thanks paddy, Since the original language from which I am translating
does not support any of these formats, I will have to write one myself.
So, which one is easy to write out in a C like environment.

regards,
Suresh
Paddy wrote:
> jm.suresh at no.spam.gmail.com wrote:
> > Hi,
> >  Is there any standard text format for storing data of object oriented
> > nature.
> >  The text file should be readable.
> >
> > That is, Is there any better way than having to write out a file like
> > this from the original place and read it in python and process it.
> >
> > #----------------------------
> > world = World(name='MyWorld')
> > world.objects.append(Box(color='red'))
> > world.objects.append(Circle(color='green'))
> > world.someProp = "123"
> > #-----------------------------
> >
> > Thanks.
> > Suresh
>
> XML ?
> YAML ?
> JSON ?
> ConfigParser module ?
> CSV file ?
> UML ?
>
> I'm finding it hard to be more specific, given your original post. so
> just squirted some data formats that are supported by multiple
> languages and can be used to transfer data between them.
>
> P.S. I don't know why I put XML first :-)
> P.P.S. And UML seems to be about pretty diagrams rather than a textual
> format, but no doubt, with the size of the companies behind it, there's
> probably a textual format hidden in their too.
> 
> 
> - Paddy.



From juliajensen888 at yahoo.com  Tue Nov 14 16:55:30 2006
From: juliajensen888 at yahoo.com (julia999)
Date: 14 Nov 2006 13:55:30 -0800
Subject: MAKE MONEY!!!
Message-ID: <1163541330.772668.95240@f16g2000cwb.googlegroups.com>

MAKE MONEY!!!

MAKE THOUSANDS!!!

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My fingers are sore from opening all the envelopes & I are
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works..........
also make sure you print this out NOW, so you can get the information
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Suggestion: Read this entire message carefully!! (Print it out or
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and me asking to be included in that list. Here are the four easy steps

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STEP ONE:


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each piece of paper "PLEASE PUT ME ON YOUR MAILING LIST."
Now get 6 U.S. $1.00 bills and place ONE inside of EACH of the six
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of paper so the bill will not be seen through the envelope (to prevent
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(1-800-238-5355)
and they
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Mail the six envelopes to the following addresses:

1) S. Phillips
77 Manly Drive
Robina, QLD 4226
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2) Chris Pittman
7651 Abigail Glen Dr.
Charlotte, NC 28212
USA


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609 n. Tweedt #203
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as
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STEP THREE:

Change anything you need to but try to keep this article as close to
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groups. :

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the
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so many others have received will come your way.

NOTE: You may want to retain every name and address sent to you,>
either on
a computer or hard copy and keep the notes people send you.

This VERIFIES that you are truly providing a service. (Also, it might
be
a good idea to wrap the $1 bill in dark paper to reduce the risk of
mail
theft). So, as each post is downloaded and the directions carefully
followed, all members will be reimbursed for their participation as a
List
Developer with one dollar each. Your name will move up the list
geometrically so that when your name reaches the #1 position you will
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receiving thousands of dollars in CASH!!! What an opportunity for only
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( $1.00 for each of the first six people listed above) Send it now, add

your
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*****DIRECTIONS FOR HOW TO POST TO NEWS GROUPS!!!*****


STEP ONE:

You do not need to re-type this entire letter to do your own
posting. Simply put your cursor at the beginning of this letter and
drag
your
cursor to the bottom of this document, and select 'copy' from the edit
menu. This
will copy the entire letter into the computer's memory.


STEP TWO:

Open a blank 'notepad' file and place your cursor at the top
of the blank page. From the 'edit' menu select 'paste'. This will paste

a
copy
of the letter into the notepad so that you will add your name to the
list.


STEP THREE:

Save your new notepad file as a text file. If you want to do your
posting
in different settings, you'll always have this file to go back to.


STEP FOUR:

You can use a program like "postXpert" to post to all the newsgroups at

once.
You can find this program at <http://www.download.com>.

Use Netscape or Internet Explorer and try searching for various new
groups (on- line forums, message boards, chat sites, discussions.)


STEP FIVE:

Visit message boards and post this article as a new message by
highlighting the text of this letter and selecting paste from the edit
menu.
Fill in the subject, this will be the header that everyone sees as they

scroll through the list of postings in a particular group, click the
post
message button. You're done.


Congratulations!!!!!!


THAT'S IT!! All you have to do, and It Really works!!!

 
BEST WISHES ...



From antroy at gmail.com  Thu Nov 30 03:35:16 2006
From: antroy at gmail.com (Ant)
Date: 30 Nov 2006 00:35:16 -0800
Subject: Why are slice indices the way they are in python?
In-Reply-To: <1164860915.349821.309920@14g2000cws.googlegroups.com>
References: <1164860915.349821.309920@14g2000cws.googlegroups.com>
Message-ID: <1164875716.231120.324590@n67g2000cwd.googlegroups.com>


Steve Bergman wrote:

...
> Why?  It doesn't seem intuitive to me.  To me, it makes it harder, not
> easier, to work with slices than if indexing started at 1 and  the
> above expression got you the 2nd throught the 5th character.

Dijkstra has an article about this:
http://www.cs.utexas.edu/users/EWD/transcriptions/EWD08xx/EWD831.html

In practice it probably wouldn't make a great deal of difference. Here
at my current job, we have a situation where a bunch of Progress 4GL
programmers have been taught Java and let loose on the code base. we
now have a situation where there are a plethora of methods written
designed to be 1-based, and you have to trawl through the code to work
out if the method was written by a Java programmer or a 4GL programmer
to save on array index exceptions...

The infuriating thing is that if you are iterating over an array in
Java, and have to use one of the functions based on an array index, you
have to use function(i + 1). Drilling back through the code, and
invariably you have the function written:

def function(i):
    return array[i-1]

!!! (at least you would if the Java was written in Python by 4GL
programmers, but you get the idea ;-)  )



From robert.kern at gmail.com  Wed Nov  8 03:04:48 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 08 Nov 2006 02:04:48 -0600
Subject: assigning a sequence to an array
In-Reply-To: <1162971378.536088.35590@m73g2000cwd.googlegroups.com>
References: <1162971378.536088.35590@m73g2000cwd.googlegroups.com>
Message-ID: <eis339$68n$1@sea.gmane.org>

amitsoni.1984 at gmail.com wrote:
> Hi,
> I am using  "A[a,:]=row" in python, where A is a matrix and row is a
> sequence. But it gives following error:
> -------- error------
>     A[a,:]=row
> ValueError: setting an array element with a sequence.
> 
> Is there a way to change type of sequence to array so that this
> situation could be handled

You don't say what array package you are using. I presume numpy. In any case,
the place to ask those questions (even for the older numarray and Numeric
packages) is the numpy list.

  http://www.scipy.org/Mailing_Lists

We will need some more information from you when you come to the numpy list.
Please reduce your problematic code to the smallest, self-contained script that
demonstrates the problem, and post it and the exact output that you get.

-- 
Robert Kern

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



From slav0nic at xss.ru  Fri Nov  3 12:54:12 2006
From: slav0nic at xss.ru (slav0nic)
Date: Fri, 03 Nov 2006 19:54:12 +0200
Subject: Forum written in Python?
In-Reply-To: <eideui$9di$1@sage.ukr.net>
References: <Xns986FB78516025mosornet@161.53.160.64>
	<eideui$9di$1@sage.ukr.net>
Message-ID: <eifvoo$b77$1@sage.ukr.net>

http://diamanda.googlecode.com  forum + wiki
sorry i was mistaken fist link at previous post%)


From xi at gamma.dn.ua  Sun Nov 19 10:11:23 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sun, 19 Nov 2006 17:11:23 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <1163902308.672892.268320@k70g2000cwa.googlegroups.com>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
	<NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
	<mailman.436.1163881833.32031.python-list@python.org>
	<1163902308.672892.268320@k70g2000cwa.googlegroups.com>
Message-ID: <20061119151123.GA15575@58sirius016.dc.ukrtel.net>

On Sat, Nov 18, 2006 at 06:11:48PM -0800, PyScripter wrote:
> Kirill Simonov wrote:
> > PyScripter does, indeed, look nice, but unfortunately it appeared to
> > have similar issues with cyrillic support. Thank you anyway for the
> > suggestion.
> 
> 
> What are the issues?  PyScripter offers full support for utf-8 encoded
> files and PEP-263.  The editor internally is unicode based.    Please
> read the PyScripter help topic "Encoded Python Source Files", paying
> special attention to the last paragraph, and if you follow the
> guidelines you should have no problem with cyrillic or other encodings.
>  If you have problems email pyscripter at gmail.com for support.

The issues are related to the emulation of sys.stdin and sys.stdout in
the interactive console (which is called Python Interpreter in
PyScripter).

In PyScripter,
    >>> print "...some cyrillic characters..."
produces output as if an UTF-8 string is displayed in latin1.
On the other hand,
    >>> print u"...some cyrillic characters..."
works correctly in PyScripter.  Both above examples works correctly in a
real console when sys.stdout.encoding is set to 'utf-8'.

raw_input() doesn't work at all with non-ASCII characters in PyScripter.
    >>> raw_input("...some cyrillic characters...")
displays the label in latin1 while
    >>> raw_input(u"...some cyrillic characters...")
produces UnicodeDecodeError.

Moreover, if I enter some cyrillic characters to the input box of
raw_input(), it returns a line of '?'. This might be related to the fact
that I use WinXP ENG (not RUS), but still I believe it's possible to
make it work even in this environment.

I'd like the emulated sys.stdin and sys.stdout to behave like the real
sys.stdin and sys.stdout do under a UTF-8 terminal when
sys.stdout.encoding is set to 'utf-8'.

Python 2.5, PyScripter 1.7.2.0.


Thanks,
Kirill


From bignose+hates-spam at benfinney.id.au  Wed Nov  1 17:40:42 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 02 Nov 2006 09:40:42 +1100
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
Message-ID: <87odrq4wph.fsf@benfinney.id.au>

Neil Cerutti <horpner at yahoo.com> writes:

> Calls to Glk functions are thus ugly and tedious.
>
>     scriptref = glk.fileref_create_by_prompt(
>             glk.fileusage_Transcript | glk.fileusage_TextMode,
>             glk.filemode_WriteAppend, 0)
>
> Please give me some good style advice for this situation.

One thing that has been implicit in other replies is the naming
convention for constants. There's nothing stopping a user from
re-binding a name in Python, so we use the convention that constants
are named with UPPER_CASE to indicate they shouldn't be re-bound.

-- 
 \       "Everything you read in newspapers is absolutely true, except |
  `\        for that rare story of which you happen to have first-hand |
_o__)                                      knowledge."  -- Erwin Knoll |
Ben Finney



From heikki at osafoundation.org  Wed Nov  1 22:28:27 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 01 Nov 2006 19:28:27 -0800
Subject: Python and SSL enabled
In-Reply-To: <1162421799.262364.100190@e3g2000cwe.googlegroups.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
	<bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
	<1162328451.004606.194700@m7g2000cwm.googlegroups.com>
	<IpydneCVwuGYqdXYnZ2dnUVZ_sCdnZ2d@comcast.com>
	<1162421799.262364.100190@e3g2000cwe.googlegroups.com>
Message-ID: <6sKdnXGZ2clC-NTYnZ2dnUVZ_oKdnZ2d@comcast.com>

matey wrote:
> I tried to run the following simple program....
> 
> #!/usr/local/bin/python
> 
> import M2Crypto
> 
> u = M2Crypto.m2urllib.URLopener()
> u.open('http://www.yahoo.com')
> 
> However I got the following errror:
> 
> Traceback (most recent call last):
>   File "test.py", line 3, in ?
>     import M2Crypto
>   File "/home/mmedina/python2.3/site-packages/M2Crypto/__init__.py",
> line 14, in ?
>     import __m2crypto
> ImportError: ld.so.1: python: fatal: relocation error: file
> /home/mmedina/python2.3/site-packages/M2Crypto/__m2crypto.so: symbol
> d2i_SSL_SESSION: referenced symbol not found
> cengsu01:/home/mmedina/scripts/python >

Sorry, no idea why you are getting this.

Btw, I think even the M2Crypto m2urllib is unsafe, you'd be better of
using some of the other convenience libs libs httpslib or something.

> However, I went back to INSTALL instructions for m2crytpo.  I saw I
> forgot to run alltests.py
> 
> I ran the alltests.py and received the following:
> 
> Traceback (most recent call last):
> ImportError: No module named __m2crypto

Currently you need to install M2Crypto before you can run the tests.
Next version of M2Crypto will have an option to run tests without
installing. I'd assume if copied the sources to your own site-packages
dir and set the PYTHONPATH environment variable this would have worked.
Notice that you'd need to copy the *built* M2Crypto dir, not the source
M2Crypto dir which does not include the .so file.

-- 
  Heikki Toivonen


From garage_dba at hotmail.com  Fri Nov 24 23:04:48 2006
From: garage_dba at hotmail.com (Bill64bits)
Date: Fri, 24 Nov 2006 22:04:48 -0600
Subject: [IronPython] [ANN] IronPython Community Edition r4
References: <5b0248170611200326n40124dd9h90f6a3a7b0b3ad06@mail.gmail.com>
Message-ID: <BAY119-DAV36A9CA86E9D2A645F1E08E0E00@phx.gbl>

How do you install this? Just copy on top of the current IP directory?
What is DefRoot.sp1 for?
  ----- Original Message ----- 
  From: Sanghyeon Seo 
  To: Discussion of IronPython ; python-list at python.org 
  Sent: Monday, November 20, 2006 5:26 AM
  Subject: [IronPython] [ANN] IronPython Community Edition r4


  This is the fourth release of IronPython Community Edition (IPCE).

  You can download it from SourceForge.
  http://sourceforge.net/projects/fepy

  FePy project aims to provide enhancements and add-ons for IronPython.
  Visit the project's homepage for more informations.
  http://fepy.sourceforge.net/

  Changes in this release follow. Some changes are credited. Uncredited
  changes are from me.

  Regular expression

  _sre.py from PyPy, a pure Python implementation of Python's regular
  expression, is included and enabled by default, overriding
  IronPython's implementation based on System.Text.RegularExpression.
  You can comment out "install_sre_py()" line from site.py to disable
  this.

  Library

  Block encryption algorithms wrappers compatible with pycrypto are added.
  New array module based on codes from PyPy, but using .NET array as storage.
  pyexpat module is enhanced to run SOAPpy.
  pyexpat module handls multiple calls to Parse(). (Fredrik Lundh)
  hashlib module accepts arrays as arguments.
  ctypes module includes correct c_float and c_double.
  ctypes module handles functions taking variable argument list (like printf).
  site module initializes support for .pth files and site-packages
  directory. (Mark Rees)
  Missing built-in codec error handling callbacks are taken from PyPy
  and registered. Namely, ignore, xmlcharrefreplace, backslashreplace.
  (Christopher Baus)
  _fileobject class is taken from CPython and included in socket module.
  (Christopher Baus)

  WSGI

  WSGI gateway is rewritten to use wsgiref library and is a lot more
  compatible as a result. (Mark Rees)
  C# side of WSGI avoids creating new IronPython engine every request. (Mark Rees)
  C# side of WSGI gains various options configurable from web.config,
  including whether to reload IronPython engine every request.
  (Christopher Baus)

  Bundles

  url2path modules are now included from Python Standard Library. (Liyu Liu)
  wsgiref package is included from CPython 2.5, as needed by new WSGI gateway.
  pycrypto and paramiko are included. (paramiko doesn't work yet,
  although it imports.)

  Patches

  You can read the summary of applied patches here.
  http://fepy.sourceforge.net/patches.html

  New in this release:
  patch-ironpython-base64-slash
  patch-ironpython-file-canseek
  patch-ironpython-re-lastgroup
  patch-ironpython-unicodeerror-object
  patch-stdlib-logging-getframe

  -- 
  Seo Sanghyeon
  _______________________________________________
  users mailing list
  users at lists.ironpython.com
  http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
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From cygnusx1 at mac.com  Sat Nov 18 00:27:08 2006
From: cygnusx1 at mac.com (Cygnus X-1)
Date: Sat, 18 Nov 2006 05:27:08 GMT
Subject: pyfits problem
References: <mailman.286.1163708914.32031.python-list@python.org>
Message-ID: <0001HW.C18403F2008395CBF0305530@news.verizon.net>

On Thu, 16 Nov 2006 15:35:00 -0500, Tommy Grav wrote
(in article <mailman.286.1163708914.32031.python-list at python.org>):

> I am trying to load in a fits-image and get this error
> 
> wiyn05dec/n1 -> display -i obj062.fits
> Traceback (most recent call last):
>    File "/Users/tgrav/Work/Astronomy/MyCode/Python/Redspit/ 
> display.py", line 48, in ?
>      main()
>    File "/Users/tgrav/Work/Astronomy/MyCode/Python/Redspit/ 
> display.py", line 30, in main
>      im  = pyfits.getdata(options.infname)
>    File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
> python2.4/site-packages/pyfits/NP_pyfits.py", line 4645, in getdata
>      _data = hdu.data
>    File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
> python2.4/site-packages/pyfits/NP_pyfits.py", line 2058, in __getattr__
>      self.data = np.array(raw_data, type=np.Float32)
> AttributeError: 'module' object has no attribute 'Float32'
> 
> I am using numpy 1.0rc3 and ActivePython 2.4.3 Build 11.
> Anyone know what is going on?
> 
> Cheers
>     Tommy

Have you opened the file?  Which version of pyFITS?

Consider:
   fimg=pyfits.open(datafile)
   self.header=fimg[0].header
   self.image=fimg[0].data

Tom
-- 
Dealing with Creationism in Astronomy
http://homepage.mac.com/cygnusx1                        
cygnusx1 at mac.com
"They're trained to believe, not to know.  Belief can be manipulated.  
Only knowledge is dangerous."  --Frank Herbert, "Dune Messiah"



From python.list at tim.thechases.com  Thu Nov  2 10:44:47 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 02 Nov 2006 09:44:47 -0600
Subject: string formatter for tuple
In-Reply-To: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
Message-ID: <454A126F.6040402@tim.thechases.com>

> a = (1,2,3)
> print "a = %s" %a
> 
> But when I run this, I get:
> 
> TypeError: not all arguments converted during string formatting
> 
> Now I realize why this happens, a is actually 3 elements when the print
> statement is only expecting to print one value.  I tried
> 
> print "a = %s" %(a)
> 
> but I got the same error.
> 
> How can I print a tuple with a single string format?


You can try

	print "a = %s" % str(a)

or

	print "a = %s" % repr(a)

which should both do the trick.

-tkc





From jm.suresh at gmail.com  Sun Nov  5 07:34:32 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 5 Nov 2006 04:34:32 -0800
Subject: string to list of numbers conversion
Message-ID: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>

Hi,
  I have a string '((1,2), (3,4))' and I want to convert this into a
python tuple of numbers. But I do not want to use eval() because I do
not want to execute any code in that string and limit it to list of
numbers.
  Is there any alternative way?

Thanks.
Suresh



From fredrik at pythonware.com  Sat Nov 25 03:34:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 09:34:55 +0100
Subject: The Python Papers Edition One
In-Reply-To: <43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
Message-ID: <ek8v7f$lp8$1@sea.gmane.org>

Tennessee Leeuwenburg wrote:

> If anyone has any good ideas for how to cope as a publisher with these
> difficulties, I'm all ears.

has any of the format zealots posting to this thread actually 
volunteered to produce any material for your publication?  if not, I 
suggest ignoring them.  any bozo with a keyboard can contribute stop 
energy to a project, but at the end, it's always the people *doing* 
things that matters.

</F>



From larry.bates at websafe.com  Fri Nov  3 11:14:19 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Nov 2006 10:14:19 -0600
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
Message-ID: <o9mdnZQHN4lE99bYnZ2dnUVZ_q6dnZ2d@comcast.com>

Michael B. Trausch wrote:
> I was wondering if anyone has had any experience with this.  Someone I
> know is trying to move away from Microsoft Works, and I am trying to
> look into a solution that would convert their data in a lossless fashion
> to a more modern format.  The database has more than 65K rows, so
> converting it to be an Excel spreadsheet, would, AFAIK, not be an option.
> 
> It would seem that MS Works can export the database as a DBF format
> database, though I have not tried it.  Before I get started, I was
> wondering if anyone has been through this problem in the past and used
> Python to solve the problem.  Knowing nearly nothing about the DBase
> family of application software, and database formats, I find myself
> feeling like the information out there is, frankly, a bit overwhelming.
> 
> Would the recipe specified in the "dbf to csv" thread be useful here for
> a file in DBase IV format?  It of course uses the same extension, but I
> am not sure if the file semantics are at all similar.  The idea at the
> end would be to probably create a database on an small SQL server (like
> MySQL) and let the person access their data using ODBC on their Windows
> workstation so that they can create form letters and the like.  They do
> not have access to MS Office's Access product, nor do they wish to use
> OOo Base (and I can't say that I blame them -- it seems to crash far too
> often to be considered reliable stuff).
> 
> 	-- Mike
MS ships ODBC interface to xBase databases in all versions of Windows.
You don't need Access.  Just create DSN to your exported dBase database
and MS Word, MS Excel, and any other ODBC aware product can read the
data.  If the data size is large or if you want to move to server, you
can do that later.

-Larry


From DustanGroups at gmail.com  Wed Nov 29 19:50:39 2006
From: DustanGroups at gmail.com (Dustan)
Date: 29 Nov 2006 16:50:39 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <mailman.843.1164822725.32031.python-list@python.org>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<1164818738.403393.112900@j44g2000cwa.googlegroups.com>
	<456DC03D.7040107@tim.thechases.com>
	<mailman.843.1164822725.32031.python-list@python.org>
Message-ID: <1164847839.111470.237810@80g2000cwy.googlegroups.com>


Eduardo "EdCrypt" O. Padoan wrote:
> >
> > One might prefer to check for string-ness, as strings can
> > duck-type somewhat like lists:
> >
> > my_list = ['my', 'brain', 'hurts']
> > my_string = 'Are you the brain specialist?'
> >
> > for test in [my_list, my_string]:
> >      try:
> >          for thing in test:
> >              process_list_item(thing)
> >      except Exception: #whatever flavor you want
>
> The exception should be the one that process_list_item raises when it
> receives a string instead of a list. if you want to treat strings and
> list in different ways, maybe it means that you are doing different
> operations on then, like appendind things to the list or whatever. If
> not, than you maybe want to test the types.
>
> >          process_string(thing) # not called because
> >          #strings are iterable
>
> What if you invert your code?
>
>
> for test in [my_string, my_list]:
>     try:
>         process_string_item(thing)
>         #suppose process_string_item does some string operation on a
> list and gets this
>         # exception - because if not, I see no meanning in distinguishing then

In case you had trouble reading the comments because it was too wide:
"suppose process_string_item does some string operation on a list and
gets this exception - because if not, I see no meanning in
distinguishing then"

Has it occurred to you that perhaps the OP wants to do very different
operations depending on whether or not the item is of type str or list?
And since a list can in many cases act very similarly to a string, the
best way to distinguish would be a type check, especially since the OP
knows what tools are being used to receive the output.

>     except ValueError:
>         for thing in test:
>             process_list_item(thing)
>
> But maybe you have a reason to do things to a string that could be
> done to a list without raising an exception, but you dont want to do
> this to *that* list. My sugestion was to think if there is another
> way, and maybe you are right.
>
>
> --
> EduardoOPadoan (eopadoan->altavix::com)
> Bookmarks: http://del.icio.us/edcrypt
> Blog: http://edcrypt.blogspot.com
> Jabber: edcrypt at jabber dot org
> ICQ: 161480283
> GTalk: eduardo dot padoan at gmail dot com
> MSN: eopadoan at altavix dot com



From kib2 at free.fr  Thu Nov 16 10:08:31 2006
From: kib2 at free.fr (tool69)
Date: Thu, 16 Nov 2006 16:08:31 +0100
Subject: ini files and plugins
Message-ID: <455c7d58$0$21668$426a74cc@news.free.fr>

Hi,
I've made a basic LaTeX file editor in wxPython, but now I wanted to add 
it some features :

1 -  create a sort of ini file where I can put the user configuration 
that will load itself on the application startup ;
2 -  a simple plugin system with python files ( maybe to add new 
langages, etc.) ;

I'm looking for simple articles, modules or code snippets on these 
subjects;
thanks,
6TooL9


From eight02645999 at yahoo.com  Wed Nov 22 20:54:42 2006
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 22 Nov 2006 17:54:42 -0800
Subject: changing list items
Message-ID: <1164246882.289304.185580@e3g2000cwe.googlegroups.com>

hi

say i have a list

alist = ['a','b','c','e','d','f']
I wanted to change the elements , say alist[2:4] .

If i do alist[2:4] = "t" , it gives
['a', 'b', 't', 'd', 'f']  which is not what i want.
I wanted  alist = ['a','b','t','t','d','f']

My list may have more elements, and i may need to replace elements from
different positions,
eg alist[10:15] , alist[30:40] etc..

thanks.



From mpeters42 at gmail.com  Wed Nov 29 02:46:33 2006
From: mpeters42 at gmail.com (Mark Peters)
Date: 28 Nov 2006 23:46:33 -0800
Subject: 6 Pick Bet Grouping
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
Message-ID: <1164786393.872448.316160@14g2000cws.googlegroups.com>

> The totalizator system allows us to merge or group these four bets as
> follows:
>
> 5 + 7 / 3 / 11 / 7 + 14 / 1 / 9 - $50  ($200 total)
I'm still trying to get my head around what you're trying to do, but
here's some code:

---------------snip-----------------
data = ["5 / 3 / 11 / 7 / 1 / 9  - $50",
        "7 / 3 / 11 / 7 / 1 / 9  - $50",
	"5 / 3 / 11 / 14 / 1 / 9  - $50",
        "7 / 3 / 11 / 14 / 1 / 9  - $50"]

pick6 = [{},{},{},{},{},{}]

for line in data:
	amount = int(line.split("-")[1].strip().lstrip("$"))
	runners = [int(s) for s in line.split("-")[0].split("/")]
	for x,r in enumerate(runners):
		qty,amt = pick6[x].get(r,(0,0))
		qty += 1
		amt += amount
		pick6[x][r] = (qty,amt)

for place in range(6):
	print "For position ",place
	for runner in sorted(pick6[place].keys()):
		bets = pick6[place][runner][0]
		betamt = pick6[place][runner][1]
		print "  Runner",runner,"has",bets,"bets for $",betamt
---------------snip-----------------
Output:

For position  0
Runner 5 has 2 bets for $ 100
Runner 7 has 2 bets for $ 100
For position  1
Runner 3 has 4 bets for $ 200
For position  2
Runner 11 has 4 bets for $ 200
For position  3
Runner 7 has 2 bets for $ 100
Runner 14 has 2 bets for $ 100
For position  4
Runner 1 has 4 bets for $ 200
For position  5
Runner 9 has 4 bets for $ 200

Is that anywhere close?



From python.list at tim.thechases.com  Thu Nov  2 12:59:20 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 02 Nov 2006 11:59:20 -0600
Subject: Converting a .dbf file to a CSV file
In-Reply-To: <C16F6BD4.477%Johanna.Pfalz@telus.net>
References: <C16F6BD4.477%Johanna.Pfalz@telus.net>
Message-ID: <454A31F8.3090103@tim.thechases.com>

> Is there a module/method in python to convert a file from .DBF format to
> .CSV format?


Well, at

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715

there's a recipe for reading DBF files...iterating over the 
returned data from the function declared there, it should be 
pretty easy to simply dump the results to a CSV file...something 
like this untested:

outfile = file('out.txt', 'w')
for i, row in enumerate(dbfreader(file('x.txt'))):
	if i == 1: continue # skip colinfo line
	outfile.write('"')
	outfile.write('","'.join(str(v) for v in row))
	outfile.write('"\n')

Escaping quotes becomes mildly hairier, but only because there 
are a number of ways to do it.  You'd just modify the "str(v)" 
with your escaping function...something like doubling them

	str(v).replace('"', '""')
or
	str(v).replace('\\', '\\\\').replace('"', '\\"')

using backslashes (where standalone-backslashes get escaped too)

Just a few idea,

-tkc





From mnations at gmail.com  Sun Nov  5 16:19:10 2006
From: mnations at gmail.com (Mudcat)
Date: 5 Nov 2006 13:19:10 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <U6s3h.3307$ig4.1327@newsread2.news.pas.earthlink.net>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
	<1162708081.974808.283370@i42g2000cwa.googlegroups.com>
	<7xy7qql7i7.fsf@ruckus.brouhaha.com>
	<1162747326.717224.236010@i42g2000cwa.googlegroups.com>
	<U6s3h.3307$ig4.1327@newsread2.news.pas.earthlink.net>
Message-ID: <1162761550.650257.201960@h54g2000cwb.googlegroups.com>


Dennis Lee Bieber wrote:

> 	IOWs, eyecandy with no functionality... Sounds like the same mindset
> that creates entire web sites using Flash animations such that one /can
> not/ access them using a simple fast-loading text modes.
>

Not exactly. Look...when you're using freeware to compete with OTS
applications then you have to keep up with appearances. One of the apps
I wrote was used by our Sales team to show to customers. These same
customers are used to seeing flashy apps being shown to them all the
time, and we are basically competing against other companies using
these programs.

Anyone who has written apps like this understand what a difference that
first appearances make. You can take the exact same program, give it a
flashier wrapper, and customers will automatically think it offers that
much more. Customers usually only test drive these things long enough
to get a feel for it, not long enough to understand what all it will
do.

Therefore you can get a competitive edge using something that sets it
apart appearance-wise. It has nothing to do with being hollow inside.



From no-spam at no-spam-no-spam.invalid  Fri Nov 24 09:39:49 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 15:39:49 +0100
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <ek707o$muf$1@news.albasani.net>

Jim wrote:
> Hi,
> 
> I have created an import module.  And would like to access a function
> from the main script, e.g.,
> 
> file abc.py:
> ###################
> def a():
>     m()
>     return None
> ####################
> 
> file main.py:
> #####################
> from abc import *
> def m():
>     print 'something'
>     return None
> 
> a()
> ######################
> 
> python25.exe main.py
> 

import __main__
...
    __main__.m()


but better make a start.py and "import main" - then its symmetric


Robert




From sjmachin at lexicon.net  Mon Nov 20 17:02:47 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 14:02:47 -0800
Subject: Help!!! New to Python and getting an error I can't figure out
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
	<mailman.512.1164050559.32031.python-list@python.org>
Message-ID: <1164060167.065261.43640@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
> Tom Mountney wrote:
>
> > if __name__ == "__main__":
> >  (g = dirGrep("c:\\winnt"))
> >  files = g.findFiles(".py")
> >  print g.findLines("java", files)
> >
> > When I try to run the program - python grep.py - I get the following error:
> >
> > C:\> python grep.py
> >   File "grep.py", line 28
> >     if __name__ == '__main__':
> >                                              ^
> > SyntaxError: invalid syntax
>
> on my machine, I get
>
> C:\> python grep.py
>    File "grep.py", line 29
>      (g = dirGrep("c:\\winnt"))
>         ^
> SyntaxError: invalid syntax
>
> which at least points to the right line.  the error here is that you
> cannot put parentheses around an assignment in Python; grouping parens
> can only be used in expressions, and assignment isn't an expression in
> Python.
>

Well it looks like I'm outvoted 1001 to 1 on a weighted basis, but
according to both Mozilla Thunderbird's news gadget and Google Groups,
the "return" line in the function immediately before the errored line
is setting up a list comprehension but there is no trailing "]". The
code does suffer from having tabs changed to spaces so that the
effective indentation is *one* space per indentation level, but I can't
see offhand where that would account for the different effects that are
being reported. I get the same results with Python 2.4.3 and 2.5
(Windows distribution).

The OP is obviously on Windows and *aarrgghh!!* putting his test files
in his *root* *directory*
     C:\> python grep.py
and so is Fredrik?? Presumably reproducing exactly the OP's conditions
:-)  This is what I did:

C:\junk>python mountney.py [Note: this is 2.4.3]
  File "mountney.py", line 28
    if __name__ == "__main__":
                             ^
SyntaxError: invalid syntax

C:\junk>\python25\python mountney.py
  File "mountney.py", line 28
    if __name__ == "__main__":
                             ^
SyntaxError: invalid syntax

*Shouldn't* make a difference.

The *only* difference I get from the OP's result is that I get the
caret exactly under the colon in the "if" line; in the message I'm
reading in Thunderbird the caret *appears* way out to the right.
Perhaps the OP could e-mail a copy of the *exact* file (if still
available) to both Fredrik and myself?

The code also suffers from typos that will bite the OP as soon as he
fixes up whatever the current problem is -- e.g. "none", "findfiles"
instead of "findFiles" -- hence my comment on downloading.

It also suffers from some deficiencies that can't obviously be blamed
on the OP's typos:

E.g. "import os" *and* "from os import isfile" but "os.listdir" is then
used in the same statement as "isfile"!? And in any case isfile is in
os.path!!!

Cheers,
John



From fredrik at pythonware.com  Sat Nov  4 02:29:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 04 Nov 2006 08:29:54 +0100
Subject: Javascript is turning into Python?!
In-Reply-To: <eih2rp$2lf$2@sea.gmane.org>
References: <7xslh1dmgt.fsf_-_@ruckus.brouhaha.com>	<1162596267.518634.164170@h54g2000cwb.googlegroups.com>	<7xr6wkt6a3.fsf@ruckus.brouhaha.com>
	<eih2rp$2lf$2@sea.gmane.org>
Message-ID: <eihfhh$ql2$1@sea.gmane.org>

Steve Holden wrote:

> Wouldn't that be
> 
>      with f() as x, g() as y:
>          blah(x, y)

or

     with f(), g() as x, y:
             pass

see guido's comment at the bottom of this page:

     http://effbot.org/pyref/with.htm

</F>



From skip at pobox.com  Wed Nov  1 06:12:05 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 1 Nov 2006 05:12:05 -0600
Subject: High level csv reader
In-Reply-To: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
References: <1162361464.706313.221590@e64g2000cwd.googlegroups.com>
Message-ID: <17736.33029.80691.995360@montanaro.dyndns.org>


    George> It occured to me that most times I read a csv file, I'm often
    George> doing from scratch things like assigning labels to columns,
    George> mapping fields to the appropriate type, ignoring some fields,
    George> changing their order, etc.  Before I go on and reinvent the
    George> wheel, is there a generic high level wrapper around csv.reader
    George> that does all this ?

I'm not aware of anything that specifically addresses these ideas.  Here are
some thoughts though:

    * If you use the DictReader class you can ignore fields you aren't
      interested in more easily since you access the fields of interest by
      name and with the fieldnames parameter to the constructor can assign
      column names to csv data which lacks it (use similar functionality in
      DictWriter to create column labels on output).  You can also specify
      the restkey parameter to the constructor and thus only specify the
      fields of interest in the fieldnames parameter.  (I think.  I've never
      actually used that capability, but that's what the documentation
      suggests.)

    * There was a thread earlier this month with this subject:

        paseline(my favorite simple script): does something similar exist?

      Check it out for a number of different solutions to formatting the
      fields in a line of text.  The idea can easily be extended to a list
      or dict of values instead, perhaps in a subclass of DictReader.

Skip


From srinathava at gmail.com  Thu Nov 30 21:41:57 2006
From: srinathava at gmail.com (srinathava at gmail.com)
Date: 30 Nov 2006 18:41:57 -0800
Subject: Trying to send keystrokes to NES emulator
Message-ID: <1164940917.344976.99750@16g2000cwy.googlegroups.com>

Hi,

I am trying to send keystrokes to the NES emulator nester[1]. The idea
was to be able to use a standard NES controller whose "state" I can
read in using Python and then conveying that to the emulator.
Unfortunately, all the attempts I have made so far have failed. It
looks like the emulator is using some extremely low-level function to
read keystrokes and I cannot get in before it.

So far, I have tried the following functions from Python's win32api and
using ctypes:

1. SendInput
http://mail.python.org/pipermail/python-win32/2005-April/003131.html

2. keybd_event
    win32api.keybd_event(90, 0, 0, 0)
   This should have sent the 'z' key to the emulator which in Contra
makes the little guy shoot. However, the emulator just sits there.

3. SendKeys
import win32api
import win32com.client

shell = win32com.client.Dispatch("WScript.Shell")

shell.AppActivate("nester")
shell.SendKeys('s')

My suspicion is that nester is using something lower-level than where
these functions change stuff. I read about GetAsyncKeyState. However, I
couldn't figure out for the life of me how to force the return value of
the GetAsyncKeyState function.

I would really appreciate any help in this regard :)

Thanks!
Srinath (speaking only on behalf of myself)

PS: Does anyone know of a good way to play old NES games on the PC
using the classic NES controllers?

[1] http://nester.dranalli.com/



From steve at holdenweb.com  Wed Nov  8 11:47:31 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 10:47:31 -0600
Subject: Delivering data to python from a c-thread
In-Reply-To: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>
References: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>
Message-ID: <eit1kp$p7b$1@sea.gmane.org>

Svein Seldal wrote:
> Hi,
> 
> I have a C-application that calls a Python function main(). This 
> function will loop forever and not return until the entire application 
> is about to terminate.
> 
> In a parallel C-thread, some data must be regularly delivered to the 
> running python application. My initial plan was to call a py function 
> deliver() from this thread, however I constantly run into troubles. I 
> keep getting a "Fatal Python error: ceval: tstate mix-up" error from 
> python, even when I handle the GIL with PyGILState_Ensure().
> 
> I fail to use PyEval_AcquireLock() prior to python call either, as the 
> main app would then constantly keep this lock when its running 
> permanently in python.
> 
> Basically I would the thread to stop the execution of the main py app, 
> call the message function deliver(). When the function returns from 
> python, resume the execution of the main pyapp.
> 

Could you have the Python code create a second Python thread and have it 
call back into the C code to collect any waiting data?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From tjgolden at gmail.com  Sun Nov 12 09:35:57 2006
From: tjgolden at gmail.com (Tim Golden)
Date: 12 Nov 2006 06:35:57 -0800
Subject: service windows avec py2exe
In-Reply-To: <1163336823.477761.68070@m7g2000cwm.googlegroups.com>
References: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
	<mailman.2072.1163197099.11739.python-list@python.org>
	<1163242265.307783.122230@f16g2000cwb.googlegroups.com>
	<1163336823.477761.68070@m7g2000cwm.googlegroups.com>
Message-ID: <1163342157.134348.3320@k70g2000cwa.googlegroups.com>


DarkPearl wrote:
> ok,
>
> It's this line who crash the service :
>
> self.WMIService
> =win32com.client.GetObject(r"winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")
>
>
> why this function goes when it is not a service?
>
> with IDLE -> ok
> with py2exe executable (no windows service) -> ok
> with py2exe service option true (windows service) -> CRASH....

OK. I think I can help here. WMI is a COM/DCOM-based technology.
Windows services are inherently multithreaded. Therefore you need to
Initialize a COM threading model specifically even though you're not
really using threads yourself.

Try putting:

import pythoncom
pythoncom.CoInitialize ()

somewhere before the line which instantiates the WMI
object (the one you quoted above).

I have no idea why this usually manifests itself as a
"Syntax Error" but it does!

TJG



From robin at NOSPAMreportlab.com  Sat Nov 11 04:54:07 2006
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sat, 11 Nov 2006 09:54:07 +0000
Subject: MySQLdb windows binaries for Python 2.5??
In-Reply-To: <1163238145.257490.144410@b28g2000cwb.googlegroups.com>
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
	<1163238145.257490.144410@b28g2000cwb.googlegroups.com>
Message-ID: <45559DBF.6070508@jessikat.plus.net>

Henk.van.Asselt at gmail.com wrote:
> I'm also looking for a MySQLdb binary for windows. This is holding me
> from upgrading from Python 2.4 to Python 2.5 !
> 
> Or does anybody know of alternatives ?   I have to connect directly to
> an MySQL database.
> 
> Henk
> 
>> HI All,
>> Does such a beast exist?  Have been looking but haven't seen any.  Any
>> insight would be appreciated.
>>
>> Thanks.
>>
>> Chris
> 

I'm just trying to build from source and am having problems getting the 
right parameters for the setup.py. It seems mysql-5.0.27 for win32 
doesn't have mysql-config.exe so the setup fails rather miserably.

-- 
Robin Becker


From moonbee5555555555 at yahoo.com  Thu Nov 30 16:04:03 2006
From: moonbee5555555555 at yahoo.com (Boneh)
Date: 30 Nov 2006 13:04:03 -0800
Subject: Tkinter
In-Reply-To: <mailman.891.1164913171.32031.python-list@python.org>
References: <1164908779.941142.242400@80g2000cwy.googlegroups.com>
	<1164912236.741499.276670@l39g2000cwd.googlegroups.com>
	<mailman.891.1164913171.32031.python-list@python.org>
Message-ID: <1164920643.073586.224530@f1g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Boneh wrote:
> >> The module is not found on the system, althouhg I can use python2.4. i
> >> am using fedoralinux5
> >
> > ????????????????????????????????????
>
> I see lots of question marks, but I don't see a question.  are you
> asking why a module you haven't installed isn't installed?  have you
> tried installing it?
> 
> </F>
Thanks, I installed tkinter and it works again fine. True! Heh



From svein at seldal dot com  Wed Nov  8 12:47:15 2006
From: svein at seldal dot com (Svein Seldal)
Date: Wed, 08 Nov 2006 18:47:15 +0100
Subject: Delivering data to python from a c-thread
In-Reply-To: <mailman.1908.1163004405.11739.python-list@python.org>
References: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>
	<mailman.1908.1163004405.11739.python-list@python.org>
Message-ID: <F9Gdnbl3uKqPhc_YRVnzvQ@telenor.com>

Steve Holden wrote:

> Could you have the Python code create a second Python thread and have it 
> call back into the C code to collect any waiting data?

Well yeah, in principle. However one would need some synchronization 
mechanisms anyway. The C data source is generating asynch. messages to 
deliver to python and thus the py thread must be ready to wait for it. 
It will add another thread in the total application (cuz' I cant remove 
the extra C thread since it has other important tasks), but I'll give it 
a shot at least!

Regards
Svein Seldal


From fredrik at pythonware.com  Tue Nov 14 07:27:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 13:27:48 +0100
Subject: __init__.py
References: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com><ejc8vi$sip$1@sea.gmane.org>
	<f4cc03640611140340q22d7f3e6pb9092148fa890347@mail.gmail.com>
Message-ID: <ejcco4$ahb$1@sea.gmane.org>

"km" wrote:

> I have a structure like this :
> foo/__init__.py
> foo/bar/__init__.py
> foo/bar/firstmodule.py
> foo/abc/__init__.py
> foo/abc/secondmodule.py
>
> now i have some variables (paths to data files) common, to be used in
> first module and second modules respectively.
> can i set those variables in foo/__init__.py so that i can access them by
> foo.mypath1 in first and second submodule class definitions?

looks ok to me, as long as you remember to actually import foo into your
submodules.

have you tried it?

</F> 





From skorobogatov at gmail.com  Fri Nov 17 04:41:16 2006
From: skorobogatov at gmail.com (skorobogatov at gmail.com)
Date: 17 Nov 2006 01:41:16 -0800
Subject: Bitwise operators. Differences from javascript and PHP.
Message-ID: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>

I can't understand a little thing in bitwise operations.


In PHP and Javascript
4653896912>>13 = -212992

In Python and Ruby
4653896912>>13 = 568102

In Python and Ruby - it's ok. I understand.
But i need to get in Python same value as in PHP and Javascript.
How can i do this?



From saikrishbe at gmail.com  Tue Nov 21 13:36:29 2006
From: saikrishbe at gmail.com (Sai Krishna M)
Date: Wed, 22 Nov 2006 00:06:29 +0530
Subject: How good is CORBA?
Message-ID: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>

Hi everybody,

i have been developing web based applications using python+cheetah.

The numbers are increasing. The applications have many common parts of
code. Though these applications are separate from each other they are
run in the same server.

I heard about CORBA... but also heard that it has some flaws...like
the programming being very complicated.
Also heard that CORBA is no more used these days...

Can someone suggest me a better option or is corba fine?

Thanks,
Sai
-- 
I love Freedom


From toreriks at hotmail.com  Fri Nov 17 09:24:42 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Fri, 17 Nov 2006 14:24:42 +0000 (UTC)
Subject: Code feedback
Message-ID: <Xns987E9CCC37042toreriknpolarno@129.242.5.222>

Hi, all I would like some feedback on a multithreaded HTTP server I've 
written. The server serves python-scripts by dynamically loading scripts
in the same directory as itself. When a request is made to one of these
scripts the script is executed and its output is returned to the 
requester.

Here is the server code, HTTPServer.py:

# Basic, threaded HTTP server, serving requests via python scripts
# Author: Tor Erik Soenvisen

# Std lib imports
import BaseHTTPServer, os, threading, Queue

class HTTPServer(BaseHTTPServer.HTTPServer):
    """ A threaded HTTP server """

    port = 80
    # Maximum requests on hold
    request_queue_size = 250
    # Maximum requests serviced concurrently
    workers = 20
    
    def __init__(self, port=None, reqSize=None, workers=None):

        if port is not None: self.port = port
        if reqSize is not None: self.request_queue_size = reqSize
        if workers is not None: self.workers = workers
        
        self.sharedPath = os.path.dirname(os.path.abspath(__file__))
        # self.sharedPath must be set before calling self.getHandlers
        self.handler = self.getHandlers()
        self.jobQueue = Queue.Queue(self.request_queue_size)
        addr = ('', self.port)
        BaseHTTPServer.HTTPServer.__init__(self, addr, 
HTTPRequestHandler)

        # Exit threads when application exits
        self.daemon_threads = True        
 
        self.createThreadPool()
        self.serve_forever()

    def getHandlers(self):
        """ Imports all python scripts in the current directory except 
this one.
            These scripts are the response generators corresponding to 
all valid
            path requests. The idea is to comprise something similar to 
a
            lightweight CGI, where each script generate HTTP responses
            to HTTP requests
        """
        import inspect
        # 1. List all files in current directory
        # 2. Skip files not having a .py extension, in addition to this 
file
        # 3. Slice of .py extension
        handler = dict.fromkeys([x[:-3] for x in os.listdir
(self.sharedPath) \
                                 if x.endswith('.py') and \
                                 x != os.path.basename(__file__)])
        for name in handler:
            handler[name] = __import__(name)
            # Make sure the handler contains a run function accepting at 
least
            # one parameter
            if not hasattr(handler[name], 'run') or \
               len(inspect.getargspec(handler[name].run)[0]) != 2:
                print 'Handler %s.py dropped because it lacks ' % name + 
\
                      'a function named run accepting two arguments'
                del handler[name]

        return handler
    
    def createThreadPool(self):
        """ Creates pool of worker threads, servicing requests """
        self.tpool = []
        for i in range(self.workers):
            self.tpool.append(threading.Thread
(target=self.process_request_thread,
                                               args=()))
            if self.daemon_threads:
                self.tpool[-1].setDaemon(1)
            self.tpool[-1].start()

    def serve_forever(self):
        """ Handle requests "forever" """
        while 1:
            self.handle_request()
        
    def process_request(self, request, client_address):
        """ Task source: dispath requests to job queue """
        self.jobQueue.put((request, client_address))

    def process_request_thread(self):
        """ Task sink: process requests from job queue """
        while 1:
            request, client_address = self.jobQueue.get()
            try:
                self.finish_request(request, client_address)
                self.close_request(request)
            except:
                self.handle_error(request, client_address)
                self.close_request(request)
    
class HTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    """ Handles HTTP requests. GET is the only method currently 
supported """

    # Set HTTP protocol version 1.1
    protocol_version = 'HTTP/1.1'
    # Set default response headers
    responseHeaders = {'Content-Type': 'text/html',
                       'Content-Length': '',
                       'Connection': 'close'}
    
    def log_message(self, format, *args):
        """ Log function: see BaseHTTPServer.py for info on arguments 
"""
        pass
    
    def do_GET(self):
        """ Handles HTTP GET requests """

        name = self.path.lstrip('/')
        try:
            handler = self.server.handler[name].run
        except KeyError:
            self.send_error(code=404, message='File %s not found' % 
name)
        else:
            data = handler(self.headers, self.responseHeaders)
            # Set Content-Length header
            self.responseHeaders['Content-Length'] = str(len(data))
            # Send headers and content
            self.send_response(200, message='OK')            
            for name, value in self.responseHeaders.items():
                self.send_header(name, value)
            self.end_headers()
            self.wfile.write(data)
        
if __name__ == '__main__':
    """ For testing purposes """
    HTTPServer(port=8081)


Pointing the browser to http://localhost:8081/index yields Hello, world! 
when the script index.py is contained in the same directory as the 
server.

index.py:

def run(request, response):
    """ Entrypoint function, called by web-server
        Argument request is the request headers as a mimetools.Message
        instance, while response is a dictionary containing the default
        response headers.
    """
    html = '<html><head><title></title></head><body>Hello, world!</body>
</html>'
    return html

Suggestions for making the server faster, more secure, more general, 
and/or more compact will be appreciated.

Regards, Tor Erik

PS: Yes, I know there exist heaps of web-servers out there.


From lisa.engblom at gmail.com  Wed Nov 29 10:07:07 2006
From: lisa.engblom at gmail.com (lisa.engblom at gmail.com)
Date: 29 Nov 2006 07:07:07 -0800
Subject: trouble writing results to files
Message-ID: <1164812827.653386.323320@80g2000cwy.googlegroups.com>

I have two semi related questions...

First, I am trying to output a list of strings to a csv file using the
csv module.  The output file separates each letter of the string with a
comma and then puts each string on a separate line.  So the code is:

import csv
output = csv.writer(open('/Python25/working/output.csv', 'a'))
a = ["apple", "cranberry", "tart"]
for elem in range(len(a)):
    output.writerow(a[elem])


... and it would write to the file:
a,p,p,l,e
c,r,a,n,b,e,r,r,y
t,a,r,t

How do I get it to write "apple", "cranberry", "tart" ?

Second, there is a significant delay (5-10 minutes) between when the
program finishes running and when the text actually appears in the
file.  Any ideas for why this happens?  It is the same for writing with
the csv module or the standard way.

thanks!
Lisa



From faulkner612 at comcast.net  Thu Nov  9 18:02:00 2006
From: faulkner612 at comcast.net (faulkner)
Date: 9 Nov 2006 15:02:00 -0800
Subject: Simple question to split
In-Reply-To: <4rhov8Frk45nU1@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
Message-ID: <1163113320.350840.69600@m7g2000cwm.googlegroups.com>

def splits(seq, cs):
    if not cs: return seq
    elif isinstance(seq, str): return splits(seq.split(cs[0]), cs[1:])
    else: return splits(sum([elem.split(cs[0]) for elem in seq], []),
cs[1:])

or
a = re.split('(\ |\,)', a)
a.remove(' ')
a.remove(',')

Matthias Winterland wrote:
> Hi,
>
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a
> single split-call?
> 
> Thx,
> Matthias



From daigno at gmail.com  Tue Nov 21 14:45:11 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Tue, 21 Nov 2006 14:45:11 -0500
Subject: Reference class in class creation
Message-ID: <45635747.9090702@gmail.com>

>class Foo(object):
>    me = None
>    def __init__(self):
>       Foo.me = self
>
>easy!
woah... not that made me skip a heartbeat or two..

careful here

easily bitten more like...

Doing this is an assured trap as the Foo.me will change at EVERY instantiation of a new object..  Kinna like taking the singleton concept and turning it`s skin inside out...  


/Vade retro satana/...  oh the insanity..  Reminds me of the Abstract Singleton pattern I once saw in my boss's code...took me a while to recover ;-)...

Now for the problem at hand...



"Gregor Horvath" <gh at gregor-horvath.com> wrote in message 
news:a1b59$4562eff8$547078de$21737 at news.chello.at...

> > Hi,
> >
> > I want to reference a class itself in its body:
>   
For the class itself you could do something like this :

class Foo(object):
    me = None
    def __init__(self):
       Foo.me = self.__class__

again the Foo.me is reinitialized at every instantiation which is not very optimal it is, tho, more predictable.


> >
> > class SomeElement(object):
> > def __init__(self, mycontainer):
> > self.mycontainer=mycontainer
> >
> > class SomeContainer(object):
> > a = SomeElement(SomeContainer)
>   
But looking at your sample here I fear that is not what you are after.  
If I understand correctly what you want is to be able to reference the 
container from the element.  One way of doing so could be

 class SomeElement(object, containerInstance):
 	def __init__(self, containerInstance):
 		self.mycontainer=containerInstance

 class SomeContainer(object):
 	a = SomeElement(self)


that way if you want the class of the container you can always do 
something like :

 <in class SomeElement>
def getContainerClass(self):
    return self.mycontainer.__class__

That`s what so great about Python...  You don`t need a scalpel to spill 
it`s guts on the table :-)

Hope this helps

cheers

Eric :D.


From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 26 05:35:39 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Nov 2006 21:35:39 +1100
Subject: problem about list indexing
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.26.10.35.39.283675@REMOVE.THIS.cybersource.com.au>

On Sun, 26 Nov 2006 00:25:13 -0800, hollowspook wrote:

> Hi, there
> 
> a = range(100)
> 
> if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7],
> a[11], a[56], a[90]]. 
> Is there any other way?

a = [7, 11, 56, 90]

Are those numbers supposed to be in some sort of series? They aren't an
arithmetic series:

(11 - 7) = 4
(56 - 11) = 45  # not a constant difference

nor are they a geometric series:

(11/7) = 1.57
(56/11) = 5.09  # not a constant ratio

They don't look like some form of a Fibonacci series:

7+11 != 56
11+56 != 90

If they're just "random" numbers, plucked out of thin air, then you
probably can't calculate them and you'll need to just create them in a
list a = [7, 11, 56, 90].



-- 
Steven.



From gh at gregor-horvath.com  Sat Nov 18 01:26:06 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Sat, 18 Nov 2006 07:26:06 +0100
Subject: What do I look for in a shared Python host?
In-Reply-To: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
Message-ID: <ejm91v$2j4$1@newsreader2.utanet.at>

walterbyrd schrieb:
> 
> What other "gotchas" would I look for?
> 

Maybe this is helpfull for you:

http://docs.turbogears.org/1.0/Hosting

-- 
Greg


From salmoni at gmail.com  Mon Nov 27 07:03:46 2006
From: salmoni at gmail.com (Alan J. Salmoni)
Date: 27 Nov 2006 04:03:46 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
	<ek8v7f$lp8$1@sea.gmane.org>
	<mailman.746.1164579677.32031.python-list@python.org>
Message-ID: <1164629026.797862.321550@l12g2000cwl.googlegroups.com>

I heartily agree. pdf format has never been much of a problem for me.
Now that you have an ISSN, has it been submitted to Google Scholar or
other academic indexes?

http://scholar.google.com/intl/en/scholar/about.html for Google Scholar
http://citeseer.ist.psu.edu/submitDocument.html for Citeseer

These are two I can think of but there must be more. Any suggestions?

I think that this is great work guys - I'll see if I can take some time
to submit some of the code I developed a few years ago.

All the best!

Alan

?ukasz Langa wrote:

> Fredrik Lundh:
> > Tennessee Leeuwenburg wrote:
> >
> >
> >> If anyone has any good ideas for how to cope as a publisher with these
> >> difficulties, I'm all ears.
> >>
> >
> > has any of the format zealots posting to this thread actually
> > volunteered to produce any material for your publication?  if not, I
> > suggest ignoring them.  any bozo with a keyboard can contribute stop
> > energy to a project, but at the end, it's always the people *doing*
> > things that matters.
> >
> > </F>
>
> +1
>
> The Python Papers look very, very promising! I'm looking forward to
> reading next editions. Don't let whiners slow you down. PDF is a good
> choice, I personally like to print out longer things I read. IANAL, so I
> won't speak for or against CC licenses. They're used widely nowadays for
> a variety of applications (music, art, software, publications) so it
> seems they're doing their job.
> 
> Keep up the good work!
> 
> Best regards,
> ?ukasz Langa



From st at tobiah.org  Wed Nov 15 14:28:04 2006
From: st at tobiah.org (tobiah)
Date: Wed, 15 Nov 2006 11:28:04 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
Message-ID: <455B6A44.1080703@tobiah.org>

I've wrestled with this for quite a while, and I think
that I've come up with a solution.  Let the heavy lifting
of the application be done with a back end python process.
I was thinking that I might use cherrypy to sit there and
wait for requests.

Then, I would have PHP make calls to this back end process
to get the content that it needs.  This could be on any level
from a simple datum from the database, or as complex as
the HTML for the entire web page.  I'm still trying to settle
on a protocol (SOAP, CORBA?) but I think that it should be
at the object level rather than simple posts to cherrypy.

Anyway, even though not all web hosters have a reasonable
python web framework installed, they will almost certainly
allow you to run python programs.  The PHP might eventually
boil down to simple function calls that get content from
the back end.  Let python do all the work:

<?php

	put_attendee_mailing_info($id);
	list_cart_items($id);

?>


walterbyrd wrote:
> I don't know if this is a fair comparison or not. Any comments
> appreciated.
> 
> - Python is more readable, and more general purpose
> - PHP has awful backward compatibility
> - PHP has a lower barrier to entry
> - Most inexpensive web-hosters support PHP, but not Python
> - PHP has far more pre-writen scripts available
> - Newer versions of mod_python require Apache 2.0, which few hosters
> have
> - There is more demand for PHP developers, than Python developers
> 

-- 
Posted via a free Usenet account from http://www.teranews.com



From fredrik at pythonware.com  Wed Nov 15 07:08:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 13:08:23 +0100
Subject: Problem reading with bz2.BZ2File(). Bug?
In-Reply-To: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>
References: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>
Message-ID: <ejevvn$p7s$1@sea.gmane.org>

Clodoaldo Pinto Neto wrote:

> The offending file is 5.5 MB. Sorry, i could not reproduce this problem
> with a smaller file.

but surely you can post the repr() of the last two lines?

</F>



From steve at REMOVEME.cybersource.com.au  Mon Nov 13 22:25:54 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 14 Nov 2006 14:25:54 +1100
Subject: Test-driven development of random algorithms
Message-ID: <pan.2006.11.14.03.25.53.274332@REMOVEME.cybersource.com.au>

I'm working on some functions that, essentially, return randomly generated
strings. Here's a basic example:

def rstr():
    """Return a random string based on a pseudo 
    normally-distributed random number.
    """
    x = 0.0
    for i in range(12):
        x += random.random()
    return str(int(x)+6))

I want to do test-driven development. What should I do? Generally, any
test I do of the form

assert rst() == '1'

will fail more often than not (about 85% of the time, by my estimate). An
easy work around would be to do this:

assert rstr() in [str(n) for n in range(-6, 6)]

but (1) that doesn't scale very well (what if rstr() could return one of
a billion different strings?) and (2) there could be bugs which only show
up probabilistically, e.g. if I've got the algorithm wrong, rstr() might
return '6' once in a while.

Does anyone have generic advice for the testing and development of this
sort of function?


-- 
Steven D'Aprano 



From steve at holdenweb.com  Mon Nov 13 16:55:52 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 15:55:52 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558BE80.9010909@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>	<1163353941.3497.45.camel@localhost.localdomain>
	<4558BE80.9010909@hobbshouse.org>
Message-ID: <ejapj1$mcn$1@sea.gmane.org>

Michael Hobbs wrote:
> Carsten Haese wrote:
>> On Sat, 2006-11-11 at 23:18 -0800, Doug wrote:
>>   
>>> Michael Hobbs wrote:
>>>     
>>>> I think the colon could be omitted from every type of compound
>>>> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
>>>>
>>>> Thanks,
>>>> - Mike
>>>>       
>>> It is a very good idea as the colon is technically redundant (not
>>> necessary for parsing, aside from one liners) and actually hurts
>>> readability (and writeability).  The "evidence" people cite for the
>>> advantage of using a colon is research done by users of the ABC
>>> language, python's predecessor.  They forget that A) that was like 20
>>> years ago,
>>>     
>> Research being old does not automatically invalidate it. Old research is
>> invalidated by newer research that invalidates it.
>>
>>   
> No, old research does is not automatically invalidated, but 
> out-of-context research is. I'm sure there's research somewhere proving 
> that code written in ALL UPPERCASE is preferable, since it makes 
> punched-cards easier to read by humans. Python 1.0 may have been a nice 
> language for "newbies", with a lot of similarities to ABC, but there has 
> been a lot of evolution since then. Sure, it's still very easy to teach 
> basic Python, but if you're concerned about readability, take a look at 
> any real-world Python app or library. You'll find it's filled with 
> things such as "__getattr__", "__repr__", "__nonzero__", and 
> "super(MyClass, self).__init__()". Hardly newbie stuff.
> 
In fact most Python doesn't use such constructs, though I'll admit the 
occasional __init__ is more or less inevitable once you start using the 
object-oriented features more than casually.

You are talking about some fairly advanced introspection, and the double 
under naming conventions were chosen precisely to indicate that some 
fairly special voodoo was being invoked. Readability is relative, and by 
the time you have the need to use the magic names they probably won't 
interfere with your reading overmuch.

> I think waving the banner of ABC simplicity in the context of Py3K is 
> about as applicable as complaining that an RSS aggregator isn't written 
> in assembly. (An RSS aggregator is so far beyond being CPU-bound that 
> it's pointless to argue which language it should be written in.)

I might take your admittedly cheerful wibbling a little more seriously 
if, rather than trying to argue that the ABC study isn't valid for 
Python, you came up with some sort of result that supported your ideas 
(which I accept you aren't really concerned to promote: does this make 
you a troll?)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From bytter at gmail.com  Wed Nov 22 13:33:29 2006
From: bytter at gmail.com (Hugo Ferreira)
Date: Wed, 22 Nov 2006 18:33:29 +0000
Subject: PyParsing and Headaches
Message-ID: <4e8efcf50611221033g67a3602u28163ae6e4efa247@mail.gmail.com>

Hi,

I'm trying to construct a parser, but I'm stuck with some basic stuff... For
example, I want to match the following:

letter = "A"..."Z" | "a"..."z"
literal = letter+
include_bool := "+" | "-"
term = [include_bool] literal

So I defined this as:

literal = Word(alphas)
include_bool = Optional(oneOf("+ -"))
term = include_bool + literal

The problem is that:

term.parseString("+a") -> (['+', 'a'], {}) # OK
term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't recognize any
token since I didn't said the SPACE was allowed between include_bool and
literal.

Can anyone give me an hand here?

Cheers!

Hugo Ferreira

BTW, the following is the complete grammar I'm trying to implement with
pyparsing:

## L ::= expr | expr L
## expr ::= term | binary_expr
## binary_expr ::= term " " binary_op " " term
## binary_op ::= "*" | "OR" | "AND"
## include_bool ::= "+" | "-"
## term ::= ([include_bool] [modifier ":"] (literal | range)) | ("~"
literal)
## modifier ::= (letter | "_")+
## literal ::= word | quoted_words
## quoted_words ::= '"' word (" " word)* '"'
## word ::= (letter | digit | "_")+
## number ::= digit+
## range ::= number (".." | "...") number
## letter ::= "A"..."Z" | "a"..."z"
## digit ::= "0"..."9"

And this is where I got so far:

word = Word(nums + alphas + "_")
binary_op = oneOf("* and or", caseless=True).setResultsName("operator")
include_bool = oneOf("+ -")
literal = (word | quotedString).setResultsName("literal")
modifier = Word(alphas + "_")
rng = Word(nums) + (Literal("..") | Literal("...")) + Word(nums)
term = ((Optional(include_bool) + Optional(modifier + ":") + (literal |
rng)) | ("~" + literal)).setResultsName("Term")
binary_expr = (term + binary_op + term).setResultsName("binary")
expr = (binary_expr | term).setResultsName("Expr")
L = OneOrMore(expr)


-- 
GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85
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From veras.murilo at gmail.com  Mon Nov 20 19:09:11 2006
From: veras.murilo at gmail.com (Murilo Veras)
Date: Mon, 20 Nov 2006 22:09:11 -0200
Subject: cancel mailing list
Message-ID: <e5e248cc0611201609q4ae44409l3a3b5cc6b53b4a47@mail.gmail.com>

Sir,
please I wish keep out this list!

murilo
veras.murilo at gmail.com
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From andrea.gavana at gmail.com  Wed Nov 15 12:46:45 2006
From: andrea.gavana at gmail.com (Andrea Gavana)
Date: Wed, 15 Nov 2006 17:46:45 +0000
Subject: PyWin32-winxptheme and py2exe
In-Reply-To: <1B3F2E002D9AD04BBC1A27B370F29EB902318B@exchange2003.dspace.de>
References: <d5ff27200611141342u4e91089bvbc49ecfa9fbd8857@mail.gmail.com>
	<1B3F2E002D9AD04BBC1A27B370F29EB902318B@exchange2003.dspace.de>
Message-ID: <d5ff27200611150946w3efefb5eiec7104d4005ffca3@mail.gmail.com>

Hi Stefan,

> You probably need to include the common Control Manifest to supprt
> themes
> see in the py2exe\samples\advanced directory for an example how to do
> it.
>

I am already doing it. In my Setup.py there is a manifest file
embedded in a Python string. Plus, I *also* have a file called
MyExecutable.exe.manifest in the working directory. I have followed
the directions given in py2exe/samples/advanced, but it still doesn't
work. I think it might be a bug in winxptheme/py2exe.

Thank you for every pointer.

Andrea.

"Imagination Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/


From cdroulers at hotmail.com  Wed Nov  8 14:01:08 2006
From: cdroulers at hotmail.com (cdroulers at hotmail.com)
Date: 8 Nov 2006 11:01:08 -0800
Subject: Problem getting a file pathname with tkFileDialog
Message-ID: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>

Hello,
I am working on a school project that requires me to get the path of a
filename for future treatment.
I've tried getting a file with tkFileDialog.askopenfile.


********************************************
import tkFileDialog
file = tkFileDialog.askopenfile()
print file
********************************************


It prints the opened files stuff, but I just can not find how to get
that path as a string. I've searched around google and the present
group, and found no documentation on the file class used with
tkFileDialog. Does someone have a solution for that?

Thank you

Christian



From horpner at yahoo.com  Thu Nov  9 13:47:53 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Nov 2006 19:47:53 +0100
Subject: Can not download plugins for jEdit (help!!)
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
	<slrnel6k51.d1q.Anders+news@tika.arnholm.se>
Message-ID: <slrnel6u0m.1p8.horpner@FIAD06.norwich.edu>

On 2006-11-09, Anders Arnholm <Anders+news at Arnholm.nu> wrote:
> Ant <antroy at gmail.com> skriver:
>>> Vim, it can handle all the things.http://www.vim.org/
>>
>> I'm not convinced of that quite yet. jEdit's syntax highlighting seems
>> more robust (see SocketServer.py in the standard library for an example
>> - vim gets the highlighting of the first doc-comment wrong). I've also
>
> I can't see that problem at all. Vim 7.0 standard win32 build and
> 6.4 on OpenBSD.
>
> My vimrc hold and old rule that I'm not sure is needed or how it works
> against the new standard python module:
>
>:au BufEnter *.py :set smarttab smartindent \
>     cinwords="if,elif,else,for,while,def,try,rxcept,finally,class"

You shouldn't need that as long as the default plugin for Python
loads correctly. (except is spelled wrong by the way.)

-- 
Neil Cerutti
Women's Luncheon: Each member bring a sandwich. Polly Phillips will
give the medication. --Church Bulletin Blooper


From lukasz.langa at gmail.com  Mon Nov 13 13:36:25 2006
From: lukasz.langa at gmail.com (=?UTF-8?B?xYF1a2FzeiBMYW5nYQ==?=)
Date: Mon, 13 Nov 2006 19:36:25 +0100
Subject: jython's future
In-Reply-To: <ejac9n$21u$1@sea.gmane.org>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>	<4rrjenFspqicU2@mid.uni-berlin.de>	<4558ACAC.1030001@web.de>	<1163440390.3434.45.camel@dot.uniqsys.com>
	<ejac9n$21u$1@sea.gmane.org>
Message-ID: <4558BB29.4020002@gmail.com>

Steve Holden:
> I think you will find that most of Fredrik Lundh's stuff will work on 
> 1.5.2. He sets a fine example to us all.
>   

1.5.2? Come on, it's 7 years old. Back then PHP was still at 3.0, Java 
was at 1.2 (and compiling Hello World took over 5 minutes), Google was 
nothing more than a search engine (still Beta at the time!).

What do we have all these cool new language features for if it's 
considered bad behaviour to actually use them?

OK, I see the point in being compatible with Python 2.1 (well, maybe 2.2 
with new-style classes and __descriptors__), just like it's still useful 
to be Java 1.4 compatible and PHP 4 compatible.

But Python 1.5.2? From the official site: "*Do yourself a favor* and get 
a more recent version!" ;-) It doesn't even have string methods. Today 
Python 1.5.2 is being implemented on one-chip GSM modules ( 
http://www.telit.co.it/product.asp?productId=96 ). And yes, it actually 
works quite well there :-)

Regards,
?ukasz Langa


From python.list at tim.thechases.com  Mon Nov 27 14:27:08 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 27 Nov 2006 13:27:08 -0600
Subject: python skipping lines?
In-Reply-To: <1164653920.282736.139870@j44g2000cwa.googlegroups.com>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>	<456B338D.4050408@NOSPAMwit.edu>
	<1164653920.282736.139870@j44g2000cwa.googlegroups.com>
Message-ID: <456B3C0C.7030300@tim.thechases.com>

I'm not sure if this will /solve/ your problem, but it's 
something I noticed...

> UnitList = open('/Python25/working/FacList.txt', 'r')
> RawData = open('/Python25/working/data.txt', 'r')

Here, you open RawData once...

> Output = open('/Python25/working/output.txt', 'a')
> 
> def PullHourlyData(filename, facility, unit):
>         for line in filename:
[cut]
> counter = 0
> 
> for combos in UnitList:
[cut]
>         PullHourlyData(RawData, FacilityName, UnitName)
>         counter += 1

and your first pass through this loop, you exhaust RawData by 
reading to the end.  The second pass through the UnitList loop, 
you pass the exhausted RawData to PullHourlyData().  I'm thinking 
you'd need to RawData.seek(0) or some such "rewind" ability.  A 
slightly ugly alternative would be just opening/closing the 
RawData file for each pass through the loop.  Another, possibly 
cleaner option (depending on the size of RawData's contents) 
would be to just read the whole thing into an in-memory list with 
something like

	data = RawData.readlines()

and then just pass "data" to PullHourlyData() each time...no need 
to rewind (like VHS vs. DVD :)

Part of the confusion stems from the fact that what you refer to 
as "filename" (sounds like it should be a string containing the 
path to the file) is actually a file object that contains state.

-tkc






From allenjo5 at mail.northgrum.com  Fri Nov 17 15:39:16 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 17 Nov 2006 12:39:16 -0800
Subject: Question about unreasonable slowness
In-Reply-To: <mailman.347.1163778501.32031.python-list@python.org>
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
	<455ce05a$0$5794$4d3efbfe@news.sover.net>
	<1163773005.201111.175020@f16g2000cwb.googlegroups.com>
	<mailman.347.1163778501.32031.python-list@python.org>
Message-ID: <1163795956.923263.200590@e3g2000cwe.googlegroups.com>


?ukasz Langa wrote:
> allenjo5 at mail.northgrum.com:
> > Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
> > shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
> > python 2.4.3.   So, that's better, but still unreasonably slow.  And to
> > answer another's question, I'm using the ksh builtin 'time' command to
> > time the overall script.
> >
> > BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
> > This naively translated pure shell version of my python test script
> > completes in .1 secs:
> >
> > i=1
> > while ((i<20))
> > do ((i+=1))
> >    print next
> >    print "$shellIn" | /bin/sh -c ':' |
> >            while read line
> >            do print $line
> >            done
> > done
> >
> > Has anyone tried this on a true unix box (AIX, HPUX, Solaris, Linux)?
> > It seems to be functioning differently (and faster) on Windows and OS X
> >  (though I guess at its heard, OS X is essentially unix).
> >
> > John.
> >
>
> Linux 2.6.17-1.2142_FC4smp #1 SMP Tue Jul 11 22:57:02 EDT 2006 i686 i686
> i386 GNU/Linux
>
> # <code>
>
> import os
> import timeit
>
> def test():
>    for i in xrange(20):
>        (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")
>        print 'next'
>        for line in shellOut:
>            print line
>
> print timeit.Timer("test()", "from __main__ import test\nimport
> os").timeit(1)
>
> # </code>
>
>
> This returns in 0.4 seconds. If I time it to do 50 tests, it returns
> after 20.2 - 20.5 seconds. Even if I substitute the for i in xrange()
> construct to your sh-like while statement. And all that through a
> network, with print statements intact. Guess your true Unix box has some
> features unavailable on Fedora Core or MacOS X ;-)

Yeah, apparently this is an AIX specific issue - perhaps the python
implementation of popen4() needs to do something special for AIX?

I've since tested my script on SunOS 5.9 with Python 2.4.2, and it took
only about 1.5 sec with or without the second for loop, but without it,
there were no extra python processes running in the background when the
main one ends, unlike what I saw on AIX.   This might be a clue to
someone who knows more than I do... any Python gurus out there runnin
AIX?

John.



From erikwickstrom at gmail.com  Fri Nov  3 15:21:33 2006
From: erikwickstrom at gmail.com (erikcw)
Date: 3 Nov 2006 12:21:33 -0800
Subject: Having trouble with file modes
Message-ID: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>

Hi all,

I've created a script that reads in a file, replaces some data (regex),
then writes the new data back to the file.

At first I was convinced that "w+" was the tool for the job.  But now
I'm finding that the contents of the file are deleted (so I can't read
the data in).

f = open('_i_defines.php', 'w+')
data = f.read()
#patterns removed for brevity.
patterns = [(tuples)(blah blah)]

#loop through patterns list and find/replace data
for o, r in patterns:
    data = data.replace(o, r)
    print "Replaced %s with %s" % (o, r)
f.write(data)
f.close()

This results in an empty file.  All of the modes I've tried either
produce an empty file or append the data onto the end of the file.  How
Can I:

Open
Read
Truncate
...process data....
Write
Close

Do I need to open and close the file twice? (once in 'r' and then again
in 'w')

Thanks!
Erik



From fredrik at pythonware.com  Mon Nov 27 09:58:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Nov 2006 15:58:25 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <200611271215.18792.mgiann@beta-cae.gr>
References: <200611261804.54669.mgiann@beta-cae.gr>	<200611271133.48359.mgiann@beta-cae.gr>	<ekecd9$e8c$1@sea.gmane.org>
	<200611271215.18792.mgiann@beta-cae.gr>
Message-ID: <ekeuei$edj$1@sea.gmane.org>

Michalis Giannakidis wrote:

>> "obj[index] = value" maps to "obj.__setitem__(index, value)".  reading
>> the documentation might help; start here:
>>
>>      http://docs.python.org/ref/specialnames.html
> 
> In this documentation page it also says:
> --snip---
> then x[i] is equivalent3.2 to x.__getitem__(i). 
> --snip--
> This, and other statements, are only roughly true for instances of new-style 
> classes. 
> --snip--
> 
> So which statements are actually true for new style classes? 
> 
> Is l[0]=1 completely different from l.append(1) or maybe insert?

l.append(1) is a method call.  L[0]=1 is syntactic sugar for a 
*different* method call.  why is this so hard to understand?

</F>



From fredrik at pythonware.com  Mon Nov 13 05:05:12 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 11:05:12 +0100
Subject: Data structure for ordered sequence
In-Reply-To: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
Message-ID: <ej9g0p$i3l$3@sea.gmane.org>

jm.suresh at no.spam.gmail.com wrote:

>  I am looking for a data structure to hold rectangles in a 2d space.
> Please point me to any module which does these operations:
>  Insert a rectangle into a particular co-ordinate.
>  Get the rectangle/s right/left/above/below side to a particular
> rectangle.
>  Get all the rectangles within a box
>  Delete a particular rectangle.

how many rectangles do you plan to store in this structure?

</F>



From webraviteja at gmail.com  Thu Nov 16 14:53:05 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 16 Nov 2006 11:53:05 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <xqxy7qbfjaw.fsf@cola3.ca.boeing.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<455c2773$1@news.unimelb.edu.au>
	<mailman.233.1163671524.32031.python-list@python.org>
	<xqxy7qbfjaw.fsf@cola3.ca.boeing.com>
Message-ID: <1163706785.572239.145430@e3g2000cwe.googlegroups.com>

> Personally, I've never gotten jpype to work.  Is it just me, or is it
> a troublesome install?
>
> Harry George
> PLM Engineering Architecture

It works fine for me now. However, I do recall having an issue a while
ago (most likely me, rather than JPype).



From spedrosa at gmail.com  Wed Nov 29 15:16:20 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 29 Nov 2006 12:16:20 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
Message-ID: <1164831380.928192.264510@l12g2000cwl.googlegroups.com>


Score: -1 (Flamebait)

gavino escreveu:

> wtf



From Thomas.Ploch at gmx.net  Thu Nov 30 21:31:33 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 01 Dec 2006 03:31:33 +0100
Subject: Open and closing files
Message-ID: <456F9405.2080509@gmx.net>

Is it defined behaviour that all files get implicitly closed when not
assigning them?

Like:

def writeFile(fName, foo):
	open(fName, 'w').write(process(foo))

compared to:


def writeFile(fName, foo):
	fileobj = open(fName, 'w')
	fileobj.write(process(foo))
	fileobj.close()

Which one is the 'official' recommended way?

Thomas


From godson.g at gmail.com  Tue Nov 21 01:13:05 2006
From: godson.g at gmail.com (Godson)
Date: Tue, 21 Nov 2006 11:43:05 +0530
Subject: Tile: anyone using it in Tkinter apps?
In-Reply-To: <8af47$45626248$4275d90a$14809@FUSE.NET>
References: <8af47$45626248$4275d90a$14809@FUSE.NET>
Message-ID: <f9822b400611202213g45afa038jdd74a5525aecbd4d@mail.gmail.com>

I've tried it out already its really nice, and my next Tkinter application
will be using Tile. Tile wrapper for Tkinter is also uploaded here recently,
you can try them (its not complete, neverthless you can use it without much
trouble)
https://sourceforge.net/project/showfiles.php?group_id=165637&package_id=211496&release_id=463359


--
Godson Gera
http://godson.auroinfo.com

On 11/21/06, Kevin Walzer <kw at kevin-walzer.com> wrote:
>
> Is anyone using Tile in their Tkinter applications?
>
> Tile provides native theming for Windows XP and Mac OS X, and provides
> an improved Tk look-and-feel on Unix/Linux.
>
> For info on Tile: http://tktable.sourceforge.net/tile
>
> It's in the process of going into the Tk core, so it will be available
> with Tk 8.5 with no additional libraries required.
>
> Just curious to see how other Python developers are using it (or if they
> are). I'm moving to Python/Tkinter from Tcl/Tk, and I'm an enthusiastic
> user of Tile with Tcl.
>
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From martin.dion at gmail.com  Tue Nov 14 17:44:08 2006
From: martin.dion at gmail.com (martdi)
Date: 14 Nov 2006 14:44:08 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <1163544247.745892.256300@k70g2000cwa.googlegroups.com>


> I'd be surprised if there was more demand for PHP developers
> than Python developers.  Google lists 51 PHP jobs and 168
> Python jobs in their internal jobs database (I just did a
> quick search).

Yes, but Google is the company that hired Guido, and that does most of
it's dev in python.

Looking at other companies yields different results:

Workopolis:
    PHP 120
    Python 36

Monster.ca:
    PHP more than 1000
    Python 976



From gagsl-py at yahoo.com.ar  Thu Nov  2 19:57:03 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 02 Nov 2006 21:57:03 -0300
Subject: __doc__ in compiled script
In-Reply-To: <eidltd$v0m$01$2@news.t-online.com>
References: <mailman.1686.1162499924.11739.python-list@python.org>
	<eidltd$v0m$01$2@news.t-online.com>
Message-ID: <7.0.1.0.0.20061102215407.05c151e0@yahoo.com.ar>

At Thursday 2/11/2006 17:54, Peter Otten wrote:

> > I have a script starting with a docstring. After compiling it with
> > compile(), is there any way I could get the docstring? __doc__ on the
> > code object doesn't work.
> > I can't use __import__ because the script has top-level statements
> > that have to be executed only once (it's not supposed to be used as a
> > module).
>
> >>> co.co_consts[list(co.co_names).index("__doc__")]
>'This is a docstring'

Good! I'll buy this one :) thanks!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sturlamolden at yahoo.no  Wed Nov  8 14:08:51 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 8 Nov 2006 11:08:51 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <1163012147.305772.191560@i42g2000cwa.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1163007675.919803.158010@m7g2000cwm.googlegroups.com>
	<1163012147.305772.191560@i42g2000cwa.googlegroups.com>
Message-ID: <1163012930.970641.261830@m73g2000cwd.googlegroups.com>


sturlamolden wrote:

> http://www-unix.mcs.anl.gov/mpi/mpich1/mpich-nt/

One should probably use this instead:

http://www-unix.mcs.anl.gov/mpi/mpich2/index.htm



From gh at gregor-horvath.com  Tue Nov 21 08:48:41 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 21 Nov 2006 14:48:41 +0100
Subject: Reference class in class creation
In-Reply-To: <Xns988284E97F275duncanbooth@127.0.0.1>
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
	<a1c52$4562f68e$547078de$28920@news.chello.at>
	<Xns988284E97F275duncanbooth@127.0.0.1>
Message-ID: <7ebdb$456303ba$547078de$26211@news.chello.at>

Duncan Booth schrieb:

> You've told us that what you are trying to do doesn't work, but you haven't 
> said why you want to do it. What is the problem you are really trying to 
> solve?

I need this for some complicated turbogears controller classes for a
generic framework.

The point is that I have a formwidget which has to know which controller
it belongs to. (Because the controller knows the path, the
sqlobjectclass etc.). The widget has to be created at class creation
time of the controller, because there is a metaclass which ensures
validation of the formwidget. (Necessary because the controller is
inherited)

Basically and stripped down this looks like this:

class ControllerMeta(type):
    def __new__(meta, class_name, bases, new_attrs):
        new_attrs["save"] = validate(new_attrs['widget_edit'])
(bases[0].save)
        return type.__new__(meta, class_name, bases, new_attrs)


class MotourForm(TableForm):
    template = "motour.templates.motourform"
    params = ["delete_attrs","cancel_attrs"]

    member_widgets = ["delete","cancel"]
    cancel = ResetButton(name="cancel")
    delete_attrs = {}

    def __init__(self, controller, *args, **kwargs):
        super(MotourForm, self).__init__(action = "%s/save" %
controller.get_path, *args, **kwargs)
        self.controller = controller
        self.delete = LinkButtonAsk(name="delete", caption =
_(u"L?schen"), question = _(u"Wirklich loeschen"),
        link = "%s/delete" % controller.get_path())

        self.cancel_attrs = dict(onClick="self.location.href='%s/back';"
                                 % controller.get_path())

class TourEdit(MotourForm):
    template = "motour.templates.touredit"
    params = ["tourposvalue"]

    member_widgets = ["tourpos"]
    tourpos = DataGridAED()

class Tour(MotourController):
  __metaclass__ = ControllerMeta
  sqlobjectclass = model.Tour

  #Here is the problem
  widget_edit = TourEdit(controller=Tour, name = "tourheader",
                         fields = [Label(name="id", label=_("Tour-ID")),
                                   TextField(name="name")])



I hope it's not to confusing.
Thank's for your help.

--
Greg


From fperez.net at gmail.com  Thu Nov  9 02:01:34 2006
From: fperez.net at gmail.com (Fernando Perez)
Date: Thu, 09 Nov 2006 00:01:34 -0700
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1163007675.919803.158010@m7g2000cwm.googlegroups.com>
	<1163012147.305772.191560@i42g2000cwa.googlegroups.com>
Message-ID: <eiujnv$rbi$1@sea.gmane.org>

sturlamolden wrote:

> Following up on my previous post, there is a simple Python MPI wrapper
> that can be used to exploit multiple processors for scientific
> computing. It only works for Numeric, but an adaptaion to NumPy should
> be easy (there is only one small C file in the source):
> 
> http://datamining.anu.edu.au/~ole/pypar/
> 
> If you are using Windows, you can get a free implementation of MPI
> here:
> 
> http://www-unix.mcs.anl.gov/mpi/mpich1/mpich-nt/

It's also worth noting

http://mpi4py.scipy.org

The project just moved over to scipy hosting a few days ago, and the boxes
haven't been unpacked yet.  But it is very actively developed, has full
numpy and MPI-2 support, and is looking very nice.

Cheers,

f



From fredrik at pythonware.com  Sat Nov 11 18:03:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 00:03:20 +0100
Subject: httplib continuation packets
In-Reply-To: <slrnelck6n.lf8.hakonrk@fox.venod.com>
References: <slrnelcd4f.jtl.hakonrk@fox.venod.com>	<mailman.2112.1163284210.11739.python-list@python.org>
	<slrnelck6n.lf8.hakonrk@fox.venod.com>
Message-ID: <ej5krm$dfq$1@sea.gmane.org>

Haakon Riiser wrote:

> Yes, and it doesn't help.

then the server is mostly likely broken beyond repair.

> By the way, this is the closest thing I've found in the bug tracker:
> https://sourceforge.net/tracker/?func=detail&atid=105470&aid=547093&group_id=5470
> The bug was closed in 2002 with this comment:
> 
>   "I changed httplib to send requests as a single packet in rev
>    1.60.  The change was made to address a performance problem,
>    but happens to fix the problem you had with the bogus
>    server, too."
> 
> Has someone changed it back since then?

nope; that change buffers the *header* part of the request to avoid 
problems with certain TCP/IP mechanisms; see

     http://svn.python.org/view?rev=27644&view=rev

for a discussion.  note that there's still no guarantee that the entire 
header is sent in a single TCP packet.

to see if this really is the problem, you could try moving the call to 
self._send_output() from the end of the endheaders() method to the end 
of the _send_request() method (around line 870 in httplib.py, at least 
in 2.5).

</F>



From Leo.Kislov at gmail.com  Tue Nov 21 05:25:35 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 21 Nov 2006 02:25:35 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <1164090521.578144.245440@m73g2000cwd.googlegroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
	<4561515B.4060106@v.loewis.de>
	<1164046257.736569.267090@j44g2000cwa.googlegroups.com>
	<45623696.90504@v.loewis.de>
	<1164090521.578144.245440@m73g2000cwd.googlegroups.com>
Message-ID: <1164104735.077609.43910@h48g2000cwc.googlegroups.com>

Ross Ridge wrote:
> > > That's the problem here, there's no
> > > encoding associated Unix filenames, they're just byte strings.
> >
> > Can you please quote chapter and verse of the POSIX spec that says
> > so?
>
> I said Unix, not POSIX.  In practice, Unix systems don't associate an
> encoding with filenames, and any byte value other than '/' or '\0' is
> permitted in a filename.

But that doesn't mean you should store pictures in file names. File
names are supposed to be human readable text labels for binary files.
Most UNIX-like distributions and admins that *care* about multilingual
support setup systems properly, *all* file names within local network
use the same encoding. In those situations when systems are
misconfigured, you can ask user what is the encoding, for example
through locale setting: I can go to a misconfigured windows share and
type "LANG=ru_RU.cp1251 ls" to correctly display Russian file names.

  -- Leo



From fredrik at pythonware.com  Fri Nov 17 01:51:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 07:51:45 +0100
Subject: determining the bounds of a tuple returned from a database
In-Reply-To: <1163744646.708954.271010@f16g2000cwb.googlegroups.com>
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
	<1163744646.708954.271010@f16g2000cwb.googlegroups.com>
Message-ID: <ejjm60$oa1$1@sea.gmane.org>

ronrsr wrote:

> it looks like the  len() function is the one I want.
> 
> for:   len(result) - i get 248,
> 
> but for len(result[0]) or len(result[1]) i always get 0.

that's a bit surprising, because both items are tuples that contain 
exactly one item:

>> (('Agricultural subsidies; Foreign aid',), ('Agriculture; Sustainable
>> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
>> Development, Birth Defects; Toxic Chemicals',),

</F>



From steve at holdenweb.com  Tue Nov  7 17:21:42 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 17:21:42 -0500
Subject: object data member dumper?
In-Reply-To: <4550f442$0$20337$426a34cc@news.free.fr>
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
Message-ID: <eir0re$gle$2@sea.gmane.org>

Bruno Desthuilliers wrote:
> tom arnall a ?crit :
> 
>>does anyone know of a utility to do a recursive dump of object data members? 
>>
> 
> 
> What are "object data members" ? (hint: in Python, everything is an 
> object - even functions and methods).
> 
> What is your real use case ?

Basically it sounds like the OP wants to see the attribute values for an 
object (and those objects' attribute values, ...). Presumably the 
recursive descent could be stopped at the built-in types.

I'm not familiar with any such thing. The code of the standard library's 
pprint module might be a good place to start (and the suggested 
functionality might make a nice addition if we could work out exactly 
what the requirement was).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Fri Nov 17 14:19:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 20:19:56 +0100
Subject: remove a list from a list
In-Reply-To: <ejkv1u$ajf$1@sea.gmane.org>
References: <ejkv1u$ajf$1@sea.gmane.org>
Message-ID: <ejl22m$l60$1@sea.gmane.org>

Rares Vernica wrote:

> I have the following problem:
> 
> I have a list like
>    e = ['a', 'b', 'e']
> and another list like
>    l = ['A', 'a', 'c', 'D', 'E']
> I would like to remove from l all the elements that appear in e 
> case-insensitive. That is, the result would be
>    r = ['c', 'D']
> 
> What is a *nice* way of doing it?

r = [i for i in e if i not in l]

or use sets.

</F>



From horpner at yahoo.com  Wed Nov  1 12:17:00 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 1 Nov 2006 18:17:00 +0100
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
Message-ID: <slrnekhlmq.1ok.horpner@FIAD06.norwich.edu>

On 2006-11-01, Paul McGuire <ptmcg at austin.rr._bogus_.com> wrote:
> I recently had to add some new constants to pyparsing,
> representing LEFT and RIGHT, but I didn't want to define such
> generic and likely-to-collide-with-user-code variable names.
>
> I settled on defining my own flavor of the Bag class, which I
> named Constants since it is there specifically to define
> constants (although it does nothing to enforce the
> "constant-ness" of the values).
>
> In your example, this would look something like:
>
> fileusage = Constants()
> fileusage.Transcript = 1
> fileusage.TextMode = 2
>
> filemode = Constants()
> filemode.Read = 1
> filemode.Write = 2
> filemode.Append = 4
> filemode.WriteAppend = filemode.Write | filemode.Append
>
> and so on.  In the client modules they would simply enter "from
> glk import fileusage, filemode".  Or if they just "import glk",
> the references to the constants look like
> "glk.filemode.Append", "flk.fileusage.TextMode", etc., and
> those garish and unsightly '_' separators are reduced to svelte
> little '.'s.
>
> I think this is a reasonable compromise in avoiding namespace
> pollution, without inflicting unseemly text entry overhead on
> your module clients.

That's looks quite tempting. Thanks!

It will be nice to provide a short way to import all the
constants at once, instead of having to write 'from glk import {a
long list}' in the common case that they want all the constants.

-- 
Neil Cerutti
Potluck supper: prayer and medication to follow. --Church Bulletin
Blooper


From sjmachin at lexicon.net  Sun Nov 12 23:55:08 2006
From: sjmachin at lexicon.net (John Machin)
Date: 12 Nov 2006 20:55:08 -0800
Subject: how do i map this?
In-Reply-To: <mailman.34.1163391109.32031.python-list@python.org>
References: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
	<mailman.34.1163391109.32031.python-list@python.org>
Message-ID: <1163393708.532194.250580@k70g2000cwa.googlegroups.com>


Ben Finney wrote:
> "ronrsr" <ronrsr at gmail.com> writes:
>
> > #row is a dictionary with keys: zid, keywords, citation, quotation
> > def print_row(row):
> >    print """<tr>
> >       <td class="pad">%(keywords)s
> >       </td>
> >       <td class="pad">%(quotation)s
> >       </td>
> >       <td class="pad">%(citation)s
> >       </td>
> >       <td class="pad" align="center"><form action="update.py"
> > name="updateform" enctype="application/x-www-form-urlencoded"
> > method="GET"><input type="hidden" name="zid" value="%(zid)d"><input
> > type="submit" value="Edit"></form>
> >       </td>
> >       </tr>
> >       """
>
> You're printing a string, and never using that 'row' parameter.

If that is so, why is he getting that message "TypeError: format
requires a mapping"?



From antroy at gmail.com  Thu Nov  9 10:23:44 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 07:23:44 -0800
Subject: Question regarding lists and regex
In-Reply-To: <mailman.1959.1163053812.11739.python-list@python.org>
References: <mailman.1959.1163053812.11739.python-list@python.org>
Message-ID: <1163085823.978483.149900@f16g2000cwb.googlegroups.com>



On Nov 9, 6:29 am, Prabhu Gurumurthy <pguru... at gmail.com> wrote:
...
> regex: I presume this is rather a dumb question, anyways here it comes! as you
> can see from my program, pattIp = r\d{1,3}\.... etc, is there any other easy way
> to group the reptitions, instead of typing the same regex 4 times.
...
>                    pattIp = r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'

pattIp = r"\d{1,3}(\.\d{1,3}){3}"

Is the best you can get using pure regexes (rather than something like
Paul's solution).



From hardcoded.software at gmail.com  Sat Nov 11 17:52:50 2006
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 11 Nov 2006 14:52:50 -0800
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
Message-ID: <1163285570.661433.14020@k70g2000cwa.googlegroups.com>


Dustan wrote:
> According to the following page on Wikipedia:
> http://en.wikipedia.org/wiki/Python_%28programming_language%29#Future_development
> reduce is going to be removed in python 3.0. It talks of an
> accumulation loop; I have no idea what that's supposed to mean. So,
>
> ===============================
> >>> x =\
> [[1,2,3],
>  [4,5,6],
>  [7,8,9]]
> >>> reduce(lambda a,b:a+b,  x,  [])
> [1, 2, 3, 4, 5, 6, 7, 8, 9]
> ===============================
>
> What's an accumulation loop, and how would I convert this code so it's
> compatible with the future 3.0 (preferably in a short sweet expression
> that I can embed in a list comprehension)?

itertools.chain or sum(x,[])



From grflanagan at yahoo.co.uk  Sun Nov  5 08:00:35 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 5 Nov 2006 05:00:35 -0800
Subject: string to list of numbers conversion
In-Reply-To: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <1162731635.673854.39640@i42g2000cwa.googlegroups.com>


jm.suresh at no.spam.gmail.com wrote:
> Hi,
>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.
>   Is there any alternative way?


Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '((1,2), (3,4))'
>>> s = filter(lambda char: char not in ')(', s)
>>> s
'1,2, 3,4'
>>> s = s.split(',')
>>> s
['1', '2', ' 3', '4']
>>> s = map(float, s)
>>> s
[1.0, 2.0, 3.0, 4.0]
>>> t1 = s[::2]
>>> t1
[1.0, 3.0]
>>> t2 = s[1::2]
>>> t2
[2.0, 4.0]
>>> zip(t1, t2)
[(1.0, 2.0), (3.0, 4.0)]
>>>

Gerard



From jrpfinch at gmail.com  Thu Nov  9 08:52:31 2006
From: jrpfinch at gmail.com (jrpfinch)
Date: 9 Nov 2006 05:52:31 -0800
Subject: newbie class-building question
In-Reply-To: <1163079226.645574.214770@m73g2000cwd.googlegroups.com>
References: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
	<1163079226.645574.214770@m73g2000cwd.googlegroups.com>
Message-ID: <1163080351.392680.154930@h54g2000cwb.googlegroups.com>

Thank you this is very helpful.  The only thing I now don't understand
is why it is calling __coerce__.  self.wrapped and other are both
lists.

Thanks

Jon



From thn at mail.utexas.edu  Fri Nov  3 16:44:24 2006
From: thn at mail.utexas.edu (Thomas Nelson)
Date: 3 Nov 2006 13:44:24 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
Message-ID: <1162590264.209704.316800@b28g2000cwb.googlegroups.com>

How hard would it be to have numpy/ scipy part of the python standard
library?
Tom


mattf wrote:
> I've discovered Python and have been trying it out lately as a possible
> replacement for computations that would ordinarily be done with a
> commercial package like Matlab or IDL. I'd like to mention a few things
> I've run across that have either surprised me or kept me from doing
> things the way I'd like to.
>
> 1) -There's a large and active sci/tech Python community out there.-
> This was something of a surprise. If you look at the python.org site
> and click down a couple of levels past the front page, there's a rather
> brief mention of scientific and numeric applications-- but I don't
> think this does justice to the current levels of activity and
> accomplishment.
>
> 2) -There's a very impressive set of libraries out there-
> NumPy, SciPy, Enthought. It's really kind of stunning how mature these
> libraries are and how much I had to poke around to figure that out.
>
> 3) -There's a problem with development under Windows.
> A typical task will entail writing a 'pure python' prototype to get the
> 'data in, data out' part of a problem straightened out, then writing a
> module in C to get adequate performance in production runs. But the C
> compiler that my employer provides (the current version of MSVS)
> doesn't produce libraries that work with the current version of Python.
> Ooops. This, in the real world, is a big problem. I -love- Python. And
> I think I could convince other people to use it. But I've got to have a
> way to produce compiled modules painlessly, i.e., without installing a
> new operating system.



From tom at t0mb.net  Sat Nov 18 16:07:58 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 21:07:58 +0000
Subject: print with variable justification (with *)
In-Reply-To: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
Message-ID: <455F762E.3090602@t0mb.net>

Why Tea wrote:
> print format % values
> An optional minimum width of the conversion, specified using one or
> more digits or an asterisk (*), which means that the width is taken
> from the next item in values
>
> That's from one of O'reilly's books. But there is no example and I
> couldn't get it to work by trials and errors. Does anyone have a
> working example?
>
> /Why Tea
>
>   
value = 3.141592654
print "%1.3f" % value


there you go :)   look at printf in c for general ideas about the format 
specifiers


From http  Wed Nov 29 23:11:24 2006
From: http (Paul Rubin)
Date: 29 Nov 2006 20:11:24 -0800
Subject: a quickie: range - x
References: <1164858136.495250.180790@14g2000cws.googlegroups.com>
Message-ID: <7xd575h8ur.fsf@ruckus.brouhaha.com>

"rjtucke" <rjtucke at gmail.com> writes:
> I want an iterable from 0 to N except for element m (<=M).
> I could write
> x = range(N)
> x.remove(m)
> but I want it in one expression.

itertools.chain(xrange(0,m), xrange(m+1, N))


From steve at holdenweb.com  Tue Nov  7 16:09:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 16:09:51 -0500
Subject: sqlite query not working
In-Reply-To: <4550f36e$0$8780$c3e8da3@news.astraweb.com>
References: <4550f36e$0$8780$c3e8da3@news.astraweb.com>
Message-ID: <eiqskn$20d$2@sea.gmane.org>

John Salerno wrote:
> Hopefully this is enough code to reveal the problem. When I run the 
> program, there are no error messages produced, it's just that the values 
> I enter don't seem to get put into the database, even though the query 
> seems to be ok.
> 
> 
>      def OnSaveRecord(self, event):
>          textfield_values = []
>          for tab in self.notebook.GetCurrentPage().GetChildren():
>              for table in self.get_textfield_ids():
>                  table_values = []
>                  for textfield_id in table:
>                      table_values.append(xrc.XRCCTRL(tab, 
> textfield_id).GetValue())
>                  textfield_values.append(table_values)
>          res_id = self.create_id(textfield_values[0][0], 
> textfield_values[0][2])
>          for table in textfield_values:
>              table.insert(0, res_id)
>          self.save_to_database(textfield_values)
> 
>      def save_to_database(self, data):
>          # doesn't work?
>          self.connection.execute("""INSERT INTO Personal VALUES
>                                  (?,?,?,?,?,?,?,?,?,?)""", tuple(data[0]))

Have you tried adding a self.connection.commit() to the code? I don't 
know whether sqlite is transactional, but if it is then the changes will 
disappear without a commit.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From Thomas.Ploch at gmx.net  Mon Nov 27 07:37:42 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Mon, 27 Nov 2006 13:37:42 +0100
Subject: working with files and directories
In-Reply-To: <7IAah.58105$uv5.416763@twister1.libero.it>
References: <7IAah.58105$uv5.416763@twister1.libero.it>
Message-ID: <456ADC16.8040106@gmx.net>

halex2000 schrieb:
> Hi all, I'm new with Python, and I thought to use it to automatically rename 
> some files in a directory, but I don't know where should I search the 
> functions: to get all the files of a directory, to rename the files and so 
> on.
> Thank you. 
> 
> 
Have you actually even tried to find some "documentation"?
Have you placed a google search "python directories rename files"?
Thomas


From li.yun.bin at gmail.com  Sat Nov 25 22:12:54 2006
From: li.yun.bin at gmail.com (YunBin Lee)
Date: 25 Nov 2006 19:12:54 -0800
Subject: Return float problem.
In-Reply-To: <1164481894.887091.196160@l39g2000cwd.googlegroups.com>
References: <1164467735.644775.289030@m7g2000cwm.googlegroups.com>
	<1164481894.887091.196160@l39g2000cwd.googlegroups.com>
Message-ID: <1164510774.952205.312320@14g2000cws.googlegroups.com>

John, Thanks for your help!

> Did you notice that the garbage is a whole number? Why? Because you
> have been (more or less) plucking ints out of some arbitrary place on
> the stack, floating them, and printing them.

I don't know how to solve it (or the right way), could you give me some
examples?



From tomas at fancy.org  Wed Nov  1 20:17:51 2006
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 01 Nov 2006 17:17:51 -0800
Subject: CSV module, DictReader problem (bug?)
References: <eib0la$86i$1@newslocal.mitre.org>
	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>
Message-ID: <jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>

John Machin wrote:

> If you were to write 'c:\temp\book1.csv', it would blow up ... because
> \t -> tab and \b -> backspace. Get into the habit of *always* using raw
> strings r'C:\Temp\Book1.csv' for Windows file names (and re patterns).
> You could use double backslashing 'C:\\Temp\\Book1.csv' but it's
> uglier.

...alternatively you can just use 'unix slashes', e.g.
'c:/temp/book1.csv', since those work just fine 'cause the Windows
APIs deal with them properly.
-tom!


From p.lavarre at ieee.org  Thu Nov  9 22:08:42 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 19:08:42 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<1163121855.884088.12970@h48g2000cwc.googlegroups.com>
	<mailman.2015.1163124094.11739.python-list@python.org>
Message-ID: <1163128122.036554.163610@f16g2000cwb.googlegroups.com>

> > ... Python can say six-nybble hex:
> >
> > >>> import binascii
> > >>> cdb = binascii.unhexlify('%02X%06X%02X%02X' % (0x08, 0x12345, 0x80, 0))
> > >>> binascii.hexlify(cdb)
> >'080123458000'
>
> The only problem I can see is that this code is endianness-dependent;
> the suggested versions using pack(">...") not. But this may not be of
> concern to you.

Thanks for cautioning us.  I suspect we agree:

i) pack('>...') can't say three byte int.
ii) binascii.hexlify evals bytes in the order printed.
iii) %X prints the bytes of an int in big-endian order.
iv) struct.unpack '>' of struct.pack '<' flips the bytes of an int
v) struct.unpack '<' of struct.pack '>' flips the bytes of an int
vi) [::-1] flips a string of bytes.

In practice, all my lil-endian structs live by the C/Python-struct-pack
law requiring the byte size of a field to be a power of two, so I can
use Python-struct-pack to express them concisely.  Only my big-endian
structs are old enough to violate that recently (since ~1972)
popularised convention, so only those do I construct with
binascii.unhexlify.

Often I wrap a big-endian struct in a lil-endian struct, but I'm ok
calling hexlify to make the big-endian struct and then catenating it
into the lil-endian struct, e.g., in the following cdb is big-endian
inside cbwBytes:

		cbwBytes = struct.pack('<IIIBBB',
			cbw.dSignature, cbw.dTag, cbw.dDataTransferLength,
			cbw.bmFlags, cbw.bLun, cbw.bCbLength,
			) + cdb[0:cdbLength] + ('\0' * (0x10 - cdbLength))



From ptmcg at austin.rr._bogus_.com  Sun Nov 26 06:11:35 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 26 Nov 2006 11:11:35 GMT
Subject: a -very- case sensitive search
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
Message-ID: <HDeah.2979$_H5.535@tornado.texas.rr.com>

"Ola K" <olakh at walla.co.il> wrote in message 
news:1164490795.866046.133230 at 45g2000cws.googlegroups.com...
> Hi,
> I am pretty new to Python and I want to make a script that will search
> for the following options:
> 1) words made of uppercase characters -only- (like "YES")
> 2) words made of lowercase character -only- (like "yes")
> 3) and words with only the first letter capitalized (like "Yes")
> * and I need to do all these considering the fact that not all letters
> are indeed English letters.
>
> I went through different documention section but couldn't find a right
> condition, function or method for it.
> Suggestions will be very much appriciated...
> --Ola
>
Ola,

You may be new to Python, but are you new to regular expressions too?  I am 
no wiz at them, but here is a script that takes a stab at what you are 
trying to do. (For more regular expression info, see 
http://www.amk.ca/python/howto/regex/.)

The script has these steps:
- create strings containing all unicode chars that are considered "lower" 
and "upper", using the unicode.is* methods
- use these strings to construct 3 regular expressions (or "re"s), one for 
words of all lowercase letters, one for words of all uppercase letters, and 
one for words that start with an uppercase letter followed by at least one 
lowercase letter.
- use each re to search the string u"YES yes Yes", and print the found 
matches

I've used unicode strings throughout, so this should be applicable to your 
text consisting of letters beyond the basic Latin set (since Outlook Express 
is trying to install Israeli fonts when reading your post, I assume these 
are the characters you are trying to handle).  You may have to do some setup 
of your locale for proper handling of unicode.isupper, etc., but I hope this 
gives you a jump start on your problem.

-- Paul


import sys
import re

uppers = u"".join( unichr(i) for i in range(sys.maxunicode)
                    if unichr(i).isupper() )
lowers = u"".join( unichr(i) for i in range(sys.maxunicode)
                    if unichr(i).islower() )

allUpperRe = ur"\b[%s]+\b" % uppers
allLowerRe = ur"\b[%s]+\b" % lowers
capWordRe = ur"\b[%s][%s]+\b" % (uppers,lowers)

regexes = [
    (allUpperRe, "all upper"),
    (allLowerRe, "all lower"),
    (capWordRe, "title case"),
    ]
for reString,label in regexes:
    reg = re.compile(reString)
    result = reg.findall(u" YES  yes Yes ")
    print label,":",result

Prints:
all upper : [u'YES']
all lower : [u'yes']
title case : [u'Yes']




From hg at nospam.com  Wed Nov 29 11:37:55 2006
From: hg at nospam.com (hg)
Date: Wed, 29 Nov 2006 10:37:55 -0600
Subject: Using Python
In-Reply-To: <mailman.839.1164818316.32031.python-list@python.org>
References: <mailman.839.1164818316.32031.python-list@python.org>
Message-ID: <9Qibh.15627$XH4.10972@newsfe14.lga>

beemer328i2004 wrote:
> Hi Guys,
> 
> I am new to this language and i need some help...
> 
> I am trying to create a script that will go into a log file and bring 
> me back the xml from an order...
> 
> For example:
> 
> go into Log1.xml and extract order number 2 from top to bottom and 
> extract it into a txt file...
> 
> Does anyone know how i can create this type of script or has like a 
> sample that i can use.. I am having a hard time starting the script..
> 
> hope someone can help
> 
> Thanks agian
> 

You might want to start here: http://diveintopython.org/

hg



From chengjialeph at gmail.com  Mon Nov 27 00:11:45 2006
From: chengjialeph at gmail.com (alyph)
Date: 26 Nov 2006 21:11:45 -0800
Subject: problem with wxTextCtrl text style
Message-ID: <1164604305.851064.319260@l12g2000cwl.googlegroups.com>

Hi,

I'm using wxTextCtrl in python (wxPython 2.6,  python 2.4). And I used
the SetStyle function to change color of some text already shown in the
TextCtrl. Everything works fine excpet if I set a whole line to a new
style the row space seems to get smaller than before... Any ideas?



From duncan.booth at invalid.invalid  Wed Nov  8 07:20:54 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Nov 2006 12:20:54 GMT
Subject: for x in... x remains global
References: <dfc90$4551c444$544abc47$21060@news.hispeed.ch>
Message-ID: <Xns98757D9C04731duncanbooth@127.0.0.1>

Antoine De Groote <antoine at vo.lu> wrote:

> for x in range(3): pass
> 
> After this statement is executed x is global variable. This seems very 
> unnatural to me and caused me 3 three days of debugging because I was 
> unintentionally using x further down in my program (typo). I would have 
> thought that variables like this are local to the for block.

Blocks in Python never create new scopes. You have global variables for 
each module and one set of local variables for each function. There is a 
minor exception in that the control variables in generator expressions are 
in a separate scope, but variables are never local to a block.

> Is there a reason this is not the case? Maybe there are PEPs or 
> something else about the matter that you can point me to?

One good reason is that sometimes you want to use the loop variable after 
the end of the loop:

for x in somesequence:
   if somecondition(x):
       break
else:
   raise NotFoundError
print "found", x

Try to write lots of small functions and then you can keep the scope of 
variables suitably small.


From l.m.aangeenbrug at gmail.com  Mon Nov 13 15:08:43 2006
From: l.m.aangeenbrug at gmail.com (lennart)
Date: 13 Nov 2006 12:08:43 -0800
Subject: Is python for me?
In-Reply-To: <1163441468.081643.189600@f16g2000cwb.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
Message-ID: <1163448523.712403.232970@i42g2000cwa.googlegroups.com>


dakman at gmail.com schreef:

> As stated above python is capable of all those things, however on
> larger applications like that it can tend to slow down a bit. And the
> executables do need a little bit of work, because it's bassicly a dll
> and a library of all your .pyc files. However python is still a great
> language and I would recomend it. And most of these things will
> probably be fixed in Python 3000!
>>
>> <<snip>>
> > Python very quickly.

Can you define 'large'? Is that large in code, or large in database? I
don't know which database is supported. If its a external db, like
MySql, the query is performed through the software of MySql, am I
right? If I'm correct, the 'slowness' comes from the amount of code in
python itself, not from the database.



From pavlovevidence at gmail.com  Thu Nov  2 00:42:56 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 1 Nov 2006 21:42:56 -0800
Subject: Hooking file open
In-Reply-To: <WV72h.85330$CA.46947@fe10.usenetserver.com>
References: <QI62h.828$Hc2.442@newsfe11.phx>
	<WV72h.85330$CA.46947@fe10.usenetserver.com>
Message-ID: <1162446176.224839.232960@k70g2000cwa.googlegroups.com>

Dale Strickland-Clark wrote:
> You might consider trapping calls to file() too, which is an alias for
> open().
>
> Also, I think I'd do my logging before calling the real function. It depends
> how you want to deal with exceptions.

OP should hook into os.open as well.  Plus, I don't think the database
modules (dbm, gdbm, bsddb) use Python open, so might want to hook into
those as well.  You have be careful with extension modules; they often
open files their own way.


Carl Banks



From justask at acme.com  Tue Nov 28 19:42:10 2006
From: justask at acme.com (Vincent Delporte)
Date: Wed, 29 Nov 2006 01:42:10 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
	<EpUah.4144$ql2.4140@newsread3.news.pas.earthlink.net>
	<slrnemohfg.4d8.nick@irishsea.home.craig-wood.com>
Message-ID: <vqlpm29ph9pqskc1v29da4hkhicf3bi2qu@4ax.com>

On Tue, 28 Nov 2006 08:30:03 -0600, Nick Craig-Wood
<nick at craig-wood.com> wrote:
>>  import os,sys,time
>>  print "pre:", os.getpid()
>>  sys.stdout = open(os.devnull, 'w')
>>  print "post:", os.getpid()
>>  time.sleep(60)
>> 
>>  (Granted, I'm on WinXP; I also suspect the original stdout is still open
>>  in the background, maybe dualled with stderr?)
>
>Yes that is the point - the original stdout is still open.
>
>I don't think this discussion is relevant to windows though - windows
>has its own way of making daemons.

Thanks everyone. I'll see if the Python script runs OK in an Asterisk
PBX on Linux.


From fredrik at pythonware.com  Wed Nov 15 17:08:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 23:08:19 +0100
Subject: ANN: pyfaq 1.0b1 is now available
Message-ID: <ejg34b$u2u$1@sea.gmane.org>

After incorporating more than 60 comments, adding a bunch of new 
articles, and having made a ludicrous amount of minor edits and
tweaks, I'm happy to announce a first "beta" release of the new
Python FAQ:

     http://effbot.org/pyfaq/

Many thanks to everyone who's contributed this far!

</F>



From paul at boddie.org.uk  Thu Nov 23 07:47:08 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Nov 2006 04:47:08 -0800
Subject: WSGI with mod_python (was: Python, WSGI, legacy web application)
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
	<mailman.622.1164260110.32031.python-list@python.org>
	<1164285174.400852.237700@j44g2000cwa.googlegroups.com>
Message-ID: <1164286028.588780.281510@j44g2000cwa.googlegroups.com>

Rob De Almeida wrote:
> Ben Finney wrote:
> > I was under the impression that WSGI in mod_python was a rather kludgy
> > way to do WSGI, but I don't know what the alternatives are. CGI?
> > Python http server (e.g. CherryPy)? Something else?
>
> You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee.

I think the motivation behind suggesting an Apache solution was that
you'd be able to migrate the PHP resources you already have running in
Apache (I assume, since PHP can run in other places these days) to
mod_python whilst staying within the Apache environment, rather than
having to maintain a number of different environments at the same time.
In other words, you'd write your replacement resources using WSGI (or
whatever) on mod_python (for performance), CGI (for relative
simplicity), or some other connection technology, and then it'd just be
a matter of changing the various directives and having Apache figure it
out.

I know some people advocate proxying to a variety of backend servers,
and the Web obviously lends itself to flexible architectures in this
respect, but there are fairly good reasons for keeping the component
count low.

Paul



From ganzeal at hotmail.com  Wed Nov  8 20:29:36 2006
From: ganzeal at hotmail.com (zeal elite)
Date: Wed, 08 Nov 2006 17:29:36 -0800
Subject: substring search without using built in utils
Message-ID: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>

Hi,

I am looking for substring search python program without using the built in 
funtions like find, or 'in'.

Appreciate it. Thanks in advance.
zeal

_________________________________________________________________
Find a local pizza place, music store, museum and more?then map the best 
route!  http://local.live.com?FORM=MGA001



From frank at chagford.com  Tue Nov 28 02:51:02 2006
From: frank at chagford.com (Frank Millman)
Date: 27 Nov 2006 23:51:02 -0800
Subject: Question about import and sys.path
Message-ID: <1164700262.370760.129210@l12g2000cwl.googlegroups.com>

Hi all

I am writing a business/accounting application. Once a user has logged
in they are presented with a menu. Each menu option has a description
and an associated file name and program name. The file name is the name
of a .py file (impName) and the program name is the name of a class in
that file which I instantiate to run the program (progName).

When a menu option is selected, I execute the program like this -
        imp = __import__(impName)
        app = getattr(imp,progName)()

All the .py files are stored in one directory, which I add to sys.path
at the beginning of the session. It all seems to work fine.

Now my program directory is getting cluttered, so I want to split it
into sub-directories, one per company (it is a multi-company system). I
can do that, and each of the subdirectories can be added to sys.path,
so it should work as at present.

However, I want the ability to have duplicate program names stored in
different subdirectories. At the time of selecting the menu option I
know which company is active, so I know which directory I want to run
the program from, but there does not seem to be a way to tell 'import'
to import from a particular directory. I could manipulate sys.path and
ensure that the correct company subdirectory is in the first position,
but that idea does not appeal to me. Maybe it is a good idea though - I
am open to suggestion.

Would 'execfile' be a good alternative? From what I can understand of
the docs it is almost equivalent, but I am not sure if there are any
implications. Here are some questions -

1. Does execfile create a .pyc file from a .py file, or does it compile
the contents of the file every time it is executed? If the latter, that
could create a performance problem.

2. The docs say 'it does not use the module administration -- it reads
the file unconditionally and does not create a new module'. What does
that mean? The main implication I can think of is that if the same
program is executed more than once in a given session, 'import' would
realise the second time that the module has already been imported, and
would not import it again, whereas 'execfile' would re-execute the file
every time. That could also create a performance hit, but I don't think
it would be too serious.

3. I assume that once a module has been imported, it stays in memory
for the life of the interpreter session. What happens with execfile?
Does it get garbage-collected after execution is complete?

4. Are there any other implications I should know about? I did read the
warning about modifying locals, but I don't do anything like that.

Thanks for any advice

Frank Millman



From ptmcg at austin.rr._bogus_.com  Sun Nov 19 16:27:30 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 21:27:30 GMT
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
	<ejpf2r$p8g$1@news.albasani.net>
Message-ID: <6%38h.599$Gk5.142@tornado.texas.rr.com>

"robert" <no-spam at no-spam-no-spam.invalid> wrote in message 
news:ejpf2r$p8g$1 at news.albasani.net...
> erikcw wrote:
>> Hi all,
>>
>> I have a collection of ordered numerical data in a list.  The numbers
>> when plotted on a line chart make a low-high-low-high-high-low (random)
>> pattern.  I need an algorithm to extract the "significant" high and low
>> points from this data.
>>
>> Here is some sample data:
>> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
>> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
>> 0.10]
>>
>> In this data, some of the significant points include:
>> data[0]
>> data[2]
>> data[4]
>> data[6]
>> data[8]
>> data[9]
>> data[13]
>> data[14]
>> ....
>>
>> How do I sort through this data and pull out these points of
>> significance?

Using zip and map, it's easy to compute first and second derivatives of a 
time series of values.  The first lambda computes 




From paul at boddie.org.uk  Fri Nov 17 05:50:30 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 17 Nov 2006 02:50:30 -0800
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<1163715688.959899.65990@h48g2000cwc.googlegroups.com>
	<1163727857.620445.231250@b28g2000cwb.googlegroups.com>
Message-ID: <1163760630.345742.69630@k70g2000cwa.googlegroups.com>

Luis M. Gonz?lez skrev:
> > > OK. But since when has python been considered a viable alternative for
> > > web development?

[...]

> The problem is (or was) for mere mortals trying to create a web site on
> shared hostings.

Yes, that was the "barrier to entry" observation, but you have to
implicitly narrow the discussion to just that if you want statements
like the one above to stand. I agree with what you're saying in the
context of "mere mortals", but for businesses and other organisations,
who have more control over hosting infrastructure, Python has been
viable for a long time.

> We all know that mod_python has its issues, and still is not a common
> or affordable feature in the vast mayority of web hosts. And prior to
> that, you only had cgi or other rather unknown solutions.

True. This kind of thing is what put the brakes on the adoption of
Webware and similar technologies where you have a long-running process
alongside the Web server processes: something a lot of commodity
hosting companies aren't interested in managing. I imagine that
mod_python could have been an acceptable vehicle for higher performance
Python hosting, given that you could just add it to the server program,
but the necessary isolation mechanisms were never developed. (And in
this context, it's interesting that the principal author of mod_python
now runs a hosting operation based on Linux-VServer technologies.)

> mod_php had a clear advantage here. Perhaps not as a language but as an
> ubiquitous and cheap alternative.

Agreed.

> In the last months (and I said "months" not years) the situation
> improved a lot, but still it is a fair to make a comparison.

The number of providers willing to run long-running processes alongside
Web server processes has certainly increased, due to an increased
demand for a certain non-Python Web framework whose technical
foundations virtually mandate such an environment. Nevertheless,
WebFaction (as an example of a more flexible provider) has been around
since the start of 2003.

Paul



From lukasz.langa at gmail.com  Wed Nov 15 11:27:07 2006
From: lukasz.langa at gmail.com (=?UTF-8?B?xYF1a2FzeiBMYW5nYQ==?=)
Date: Wed, 15 Nov 2006 17:27:07 +0100
Subject: jython's future
In-Reply-To: <12lkpd83jpjol3f@corp.supernews.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>	<4rrjenFspqicU2@mid.uni-berlin.de>
	<4558ACAC.1030001@web.de>	<1163440390.3434.45.camel@dot.uniqsys.com>	<ejac9n$21u$1@sea.gmane.org>	<mailman.80.1163442992.32031.python-list@python.org>
	<12lkpd83jpjol3f@corp.supernews.com>
Message-ID: <455B3FDB.5010804@gmail.com>

Ed Jensen:
> ?ukasz Langa <lukasz.langa at gmail.com> wrote:
>   
>> Java was at 1.2 (and compiling Hello World took over 5 minutes)
>>     
>
> Bullshit.  Complete and utter bullshit.
>   

Someone else already gave you the hints on the actual relevance of my 
post but let me show you one more thing:

http://www.flex-compiler.lcs.mit.edu/Harpoon/hypermail/java-dev/0478.html 
(a hint: 373s > 5min, actually)

Also, note the date of the post. So, what's your problem, Ed? For the 
matter, you could use some reading: 
http://www.amazon.com/Excuse-Me-Little-Book-Manners/dp/0448425858

Regards,
?ukasz Langa




From nospam at domain.tld  Fri Nov 17 03:33:39 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Fri, 17 Nov 2006 09:33:39 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<mailman.319.1163751579.32031.python-list@python.org>
Message-ID: <ejjs53$m2b$1@kohl.informatik.uni-bremen.de>

Hendrik van Rooyen wrote:

> I seem to recall previous discussion on this group about a thing called
> the bastion module,
> and that it was deprecated.  Not sure if it has any relevance.

Never heard about it, maybe it's worth a look for the OP.

Stephan




From wojciech_mula at poczta.null.onet.pl.invalid  Thu Nov  2 10:45:46 2006
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Thu, 2 Nov 2006 15:45:46 +0000 (UTC)
Subject: string formatter for tuple
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
	<mailman.1663.1162481904.11739.python-list@python.org>
Message-ID: <slrnekk4fh.16d.wojciech_mula@cat.tac>

Tim Chase wrote:
> 	print "a = %s" % repr(a)

or
	print "a = %r" % (a,)


From bborcic at gmail.com  Thu Nov 23 04:49:30 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 23 Nov 2006 10:49:30 +0100
Subject: psyco-simplified idioms ?
Message-ID: <45656ed7$1_4@news.bluewin.ch>

I am curious about idioms instinctively avoided by experienced programmers 
because of inefficiencies that psyco eliminates. IOW, are there any identifiable 
ways in which the backing of psyco promotes simpler code by eliminating 
efficiency concerns ?

Best, BB


From b.prashant at gmail.com  Thu Nov 23 10:07:44 2006
From: b.prashant at gmail.com (prashant)
Date: 23 Nov 2006 07:07:44 -0800
Subject: ImportError: No module named getopt
Message-ID: <1164294464.445025.326640@f16g2000cwb.googlegroups.com>

I am running a python script which has the line

import getopt, sys, os, re, string

And i get the error

ImportError: No module named getopt

Could you please point out a possible solution for this?



From thinker at branda.to  Thu Nov 16 22:58:12 2006
From: thinker at branda.to (Thinker)
Date: Fri, 17 Nov 2006 11:58:12 +0800
Subject: Heap Memory
In-Reply-To: <312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>	<ejia35$cfk$1@sea.gmane.org>
	<312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
Message-ID: <455D3354.7000002@branda.to>

Gregory Pi?ro wrote:
> This computer it was running on has 2GB of RAM and 6GB of virtual
> memory so I really doubt I had used up all of that memory.  I didn't
> watch it the whole time so I can't be sure though.  Any ideas what
> could have been going on there?
>
> -Greg
>   
What is your OS? Maybe you should show out the memory usage of your python
process. In FreeBSD, you should set evironment variable
'MALLOC_OPTIONS=P' to
print out usage of malloc()?Maybe you can find a way, in your system,
to print out usage of the
heap.

-- 
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py



From clodoaldo.pinto at gmail.com  Wed Nov 15 06:52:06 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 15 Nov 2006 03:52:06 -0800
Subject: Problem reading with bz2.BZ2File(). Bug?
Message-ID: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>

When comparing two files which should be equal the last line is
different:

The first file is a bzip2 compressed file and is read with
bz2.BZ2File()
The second file is the same file uncompressed and read with open()

The first file named file.txt.bz2 is uncompressed with:

$ bunzip2 -k file.txt.bz2

To compare I use this script:
###############################
import bz2

f1 = bz2.BZ2File(r'file.txt.bz2', 'r')
f2 = open(r'file.txt', 'r')
lines = 0
while True:
   line1 = f1.readline()
   line2 = f2.readline()
   if line1 == '':
      break
   lines += 1
   if line1 != line2:
      print 'line number:', lines
      print repr(line1)
      print repr(line2)
f1.close()
f2.close()
##############################

The offending file is 5.5 MB. Sorry, i could not reproduce this problem
with a smaller file.
http://fahstats.com/img/file.txt.bz2

Regards, Clodoaldo Pinto Neto



From steve at REMOVEME.cybersource.com.au  Wed Nov 15 23:23:11 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 16 Nov 2006 15:23:11 +1100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
Message-ID: <pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>

On Thu, 16 Nov 2006 04:02:58 +0100, Fredrik Tolf wrote:

> Hi List!
> 
> I was thinking about secure Python code execution, and I'd really
> appreciate some comments from those who know Python better than I do.
> 
> I was thinking that maybe it could be possible to load and run untrusted
> Python code, simply by loading it in a module with a modified version of
> __builtins__. Without any reachable function that do unsafe operations,
> code running from there shouldn't be able to do evil things.

How would you prevent a Denial Of Service attack like this?

# don't try this at home kids! leave this to the professionals!
n = 10000**4
L = []
for i in range(n):
    L.append(str(2L**n))

Here's an interesting one. Bug or deliberate attack?


def evens():
    # iterator returning even numbers
    i = 0
    while True:
        yield i
        i += 2
# now get all the even numbers up to 15
L = [n for n in evens() if n < 15]



-- 
Steven D'Aprano 



From sjmachin at lexicon.net  Mon Nov  6 21:09:18 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 18:09:18 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <302524-2rs.ln1@lairds.us>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
	<1162853677.881233.76940@m7g2000cwm.googlegroups.com>
	<1162854065.932910.99240@k70g2000cwa.googlegroups.com>
	<302524-2rs.ln1@lairds.us>
Message-ID: <1162865357.979822.161480@e3g2000cwe.googlegroups.com>


Cameron Laird wrote:
> In article <1162854065.932910.99240 at k70g2000cwa.googlegroups.com>,
> John Machin <sjmachin at lexicon.net> wrote:
> >
> >Thomas W wrote:
> >> Ok, I've cleaned up my code abit and it seems as if I've
> >> encoded/decoded myself into a corner ;-). My understanding of unicode
> >> has room for improvement, that's for sure. I got some pointers and
> >> initial code-cleanup seem to have removed some of the strange results I
> >> got, which several of you also pointed out.
> >>
> >> Anyway, thanks for all your replies. I think I can get this thing up
> >> and running with a bit more code tinkering. And I'll read up on some
> >> unicode-docs as well. :-) Thanks again.
> >
> >I strongly suggest that you read the docs *FIRST*, and don't "tinker"
> >at all.
> 			.
> 			.
> 			.
> Does
> <URL: http://www.unixreview.com/documents/s=10102/ur0611d/ur0610d.htm >
> help?

Hi Cameron,
Yes.
Sorry for short reply -- gotta run to bookshop :-)
Cheers,
John



From walterbyrd at iname.com  Wed Nov 15 20:59:26 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 17:59:26 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <455baf21$0$28561$426a74cc@news.free.fr>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
Message-ID: <1163642366.698784.130390@i42g2000cwa.googlegroups.com>


Bruno Desthuilliers wrote:
> walterbyrd a ?crit :

> You mean there are web hosting companies that are still using Apache
> 1.3.x ?
>

Practically all web-hosters still use Apache 1.3.x. Certainly all of
the lower priced hosters.

> C'mon, let's be serious. I just ordered a dedibox - a small dedicated
> web server - for my personal use. It's only 30 euros a month, you know...

What if I only need 25mb of space? I can that with a PHP hoster for $10
a year. That is about 1/36th the price that you posting about.

Maybe you don't mind paying 30 euros a month, but a lot others do.



From apardon at forel.vub.ac.be  Thu Nov  9 11:31:21 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Nov 2006 16:31:21 GMT
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
	<mailman.1948.1163035654.11739.python-list@python.org>
	<pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>
	<slrnel614m.8b8.apardon@rcpc42.vub.ac.be>
	<pan.2006.11.09.13.19.46.794053@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnel6lup.8b8.apardon@rcpc42.vub.ac.be>

On 2006-11-09, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
> On Thu, 09 Nov 2006 10:36:07 +0000, Antoon Pardon wrote:
>
>> On 2006-11-09, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>>> On Thu, 09 Nov 2006 12:27:12 +1100, Ben Finney wrote:
>>>
>>>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>>>> 
>>>>> Ben Finney wrote:
>>>>> > If you pass a *mapping* of the
>>>>> > "I-might-want-to-add-more-in-the-future" values, then you get both
>>>>> > explicit *and* expandable, without an arbitrary unneeded sequence.
>>>>>
>>>>> Do you mean by using the **kwargs parameter?
>>>> 
>>>> No. 
>>>
>>> Well, that'll teach me to put words in your mouth.
>>>
>>> [snip]
>>>> If you have a group of named, semantically-related, unsequenced values,
>>>> pass them into the function as a mapping object (a dict object).
>>>
>>> Still, if you are doing this:
>>>
>>> mapping_object = {"strength": roll_dice(10),
>>>     "intelligence":roll_dice(10),
>>>     "dexterity":roll_dice(10)}
>>> my_character = Character(mapping_object)
>>>
>>> then there is little benefit to building the dict just for the purposes of
>>> passing it to Character(), never to use it again, not when you can do this:
>>>
>>> my_character = Character(strength: roll_dice(10), 
>>>     intelligence:roll_dice(10), dexterity:roll_dice(10))
>> 
>> But you will have to adapt this if you want extra or different
>> characteristics.
>
> Sure, but only in one place:

Are your sure? The OP had subclasses like Fighter, Mage etc.
So it seems that you have to do something like this for
every such subclass. Or am I missing something.

> # now have charisma
> my_character = Character(strength=roll_dice(8), 
>     intelligence=roll_dice(12), dexterity=roll_dice(20),
>     charisma=roll_dice(6))
>
> If all the char attributes are initialised with the same function, it
> may make sense to set them in a loop, as you do below. But if they are all
> calculated differently, as above, then you lose the benefit of a loop.

Not necesarily. You could have a table as follows:

  characteristics = [("strength", partial(roll_dice, 8)),
                     ("inteligence" , partial(roll_dice, 12),
		     ...

  chardict={}
  for char, roller in characteristics:
    chardict[char] = roller()


>> Personnally I would prefer something like:
>> 
>>   chardict = {}
>>   for char in characteristics:
>>     chardict[char] = roll_dice(10)
>> 
>>   my_character = Character(chardict)
>> 
>> This way you only have to keep your characteristics in one place.
>
> As I do.
>
> Remember, the prerequisite for my suggestion to make sense is that, once
> you've created your initial character attributes and stuck them in a dict,
> you never use the dict again. Also, I'm assuming the constraint that there
> is a manageably small number of character attributes.

That depends on how the rest of the game is set up. Suppose the
character is wandering through a maze. Now in the maze are "tests"
which require the character to roll under a certain characteristic
with a certain bonus/malus. So such a test object value may be
equivallent to ("strength" , -2) I think such a setup will be
easier to implement if you keep the characteristics as a dictionary
within a character instance.

Now whether such a scheme would suit the OP is up to him to decide.

>>> If you happen to already have collected your character attributes in a
>>> mapping object for some other reason, then well and good, pass it into the
>>> function. Otherwise, well, I believe the correct container for
>>> character attributes is a Character, not a dict.
>> 
>> What is wrong with keeping the character attributes in a dict in the
>> Character?
>
> For the same reason we typically say object.attribute rather than
> object.__dict__[attribute]

But we also typically use:

  object.some_dict[some_characteristic]

rather than

  object.__dict__[some_characterictic]

where some_charaterictic contains the name of a characteristic.

> Perhaps you missed the original post, where one of the constraints was
> that character attributes in the game were also object attributes. E.g.
>
> class Character(object):
>     def __init__(self, strength):
>         self.strength = strength
>
> The question posed was, what is the best way of calling __init__ with
> values for those character attributes?

Well if that is what he wants.

> If the character attributes vary at runtime, or there are many of them, or
> if they are needed together (rather than individually) in multiple places
> apart from Character.__init__, then it makes sense to bundle them up in a
> dict and pass the dict around, like Ben and now you are suggesting.

It is not only that they can vary ay runtime. There is also the
possibility that you don't know in advance which one you will need
because that is decided by the environment. I think that would be
an argument in favor of a dict too.

> But if the character attributes are not varying, and there are only a few,
> and they only get used collectively for Character.__init__, then I don't
> believe there is any advantage to putting them in a dict to be used once
> and then tossed away.

I guess it depends on how he will need those characteristics later on.

> To give an analogy, if you are writing a coordinate class, you would
> likely do something like this:
>
> class Coord(object):
>     def __init__(self, x, y):
>         self.x = x
>         self.y = y

But what if the application often needed one value from such an
object. So lots of time you would be given a coord plus an
indication of what value was wanted by giving a name, so that
you ended up doing a lot of getattr(coord, name) calls.
Because whether you needed the x or y coordinate is decided
by the data and not by the program structure.


May be the O.P. should decide first on how he is going to use
these characteristics in the rest of his game before deciding
what is the best approach.

-- 
Antoon Pardon


From antroy at gmail.com  Wed Nov  8 10:54:05 2006
From: antroy at gmail.com (Ant)
Date: 8 Nov 2006 07:54:05 -0800
Subject: Exception Handling in TCPServer (was;
	Problem exiting application in Windows Console.)
In-Reply-To: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
Message-ID: <1163001245.707034.310900@f16g2000cwb.googlegroups.com>


Ant wrote:
...
> However, at this point instead of getting back to a command prompt, I
> get an unresponsive console. Hitting CTRL-Break gets me the command
> prompt back, but I would have expected to get back the command prompt
> as soon as the sys.exit(0) had completed.
...
> class HelpHTTPRequestHandler(SimpleHTTPRequestHandler):
>     def do_GET(self):
>         print "PATH: ", self.path
>         if self.path.endswith("quit.html"):
>             print "Exiting..."
>             sys.exit(0)
>         else:
>             return SimpleHTTPRequestHandler.do_GET(self)
>
> def help(base_dir, server_class=HTTPServer,
> handler_class=HelpHTTPRequestHandler):
...

OK, I've narrowed the problem back to the way HTTPServer (actually its
TCPServer parent) handles exceptions thrown by the process_request
method by catching them all, and then calling a handle_error method.
There doesn't seem to be a way of getting at the exception thrown
however - does anyone know how I can get this information?

The default handle_error method in the TCPServer uses the traceback
module to print the stacktrace, but I can't find anything in that
module to get the actual exception object (or string) - is there an
alternative trick?

Incidentally, this seems to me to be a pretty drastic try: except:
block, catching *everything* and then (essentially) discarding the
exception. Wouldn't it be better to either catch only the exceptions
that are expected (presumably IO errors, Socket exceptions, HTTP error
code exceptions etc), and let others pass through, or alternatively
pass the exception through to the handle_error() method since this is
where it should be dealt with?

Thanks.



From trentm at activestate.com  Mon Nov 27 12:48:45 2006
From: trentm at activestate.com (Trent Mick)
Date: Mon, 27 Nov 2006 09:48:45 -0800
Subject: Active State and Komodo...
In-Reply-To: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
Message-ID: <456B24FD.1000803@activestate.com>

Steve Thompson wrote:
> Hello all,
> 
> I was wondering the differnced there were betwee Active State's python and
> the open source version of python. 

Here is the best answer to that:
http://groups.google.com/group/comp.lang.python/tree/browse_frm/thread/e8291fcb1418e80/16f39060f654402f?rnum=1&hl=en&q=ActivePython+trent&_done=%2Fgroup%2Fcomp.lang.python%2Fbrowse_frm%2Fthread%2Fe8291fcb1418e80%2F98c87a6a5dc8f3c0%3Ftvc%3D1%26q%3DActivePython+trent%26hl%3Den%26#doc_b6f732ab2c8434ef
http://tinyurl.com/y7r47q


> Would I have to unistall my opend souce
> python? 

No. As BartlebyScrivener wrote you shouldn't do that. You can easily install 
ActivePython side-by-side with another Python install on Linux.


 > Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
> unler SuSE Linux v. 10.i?
> 
> Addionally, is the eric IDE (version 3) an acceptible IDE or are there
> more easy and more productive IDE's for perl?

*I* like Komodo, but then I am biased because I am one of its developers. :)
I presume you meant Python instead of Perl there, but if not, Komodo does 
support Perl as well as Python (and PHP, JavaScript, Ruby, Tcl and XSLT too).

This is a pretty good review of Python IDEs (although note that most, if not 
all, of the IDEs reviewed there will have advanced a few versions).

http://spyced.blogspot.com/2005/09/review-of-6-python-ides.html


Komodo 4 is currently under public beta (Komodo 4 beta 1 is out now and beta 2 
should be released later this week). Try it out:

http://www.activestate.com/products/komodo/beta.plex#features


Cheers,
Trent

-- 
Trent Mick
trentm at activestate.com


From steve at holdenweb.com  Thu Nov 16 09:07:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 14:07:35 +0000
Subject: Decimal() instead of float?
In-Reply-To: <7xhcwzy8kx.fsf@ruckus.brouhaha.com>
References: <1163294604.4675.4.camel@pepper>	<mailman.2125.1163295096.11739.python-list@python.org>	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>	<1163322853.760315.51040@k70g2000cwa.googlegroups.com>	<455b82a0$0$7054$c3e8da3@news.astraweb.com>	<ejg2h0$rpg$1@sea.gmane.org>	<mailman.240.1163673388.32031.python-list@python.org>
	<7xhcwzy8kx.fsf@ruckus.brouhaha.com>
Message-ID: <ejhr8s$170$1@sea.gmane.org>

Paul Rubin wrote:
> Steve Holden <steve at holdenweb.com> writes:
>> Unfortunately some applications are getting such large tables that a
>> 32-bit field is insufficient to enumerate all existing and deleted
>> rows. Then you have to start keeping tables of unused primary keys.
> 
> Please tell me that's not from some Kafka nightmare.  They don't use
> 64-bit ints?

I don't believe SQL Server , for example, yet supports 64-bit identity 
values. If it does, then the version that at least one Python user has 
in use certainly doesn't.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jrpfinch at gmail.com  Thu Nov 23 13:00:33 2006
From: jrpfinch at gmail.com (jrpfinch)
Date: 23 Nov 2006 10:00:33 -0800
Subject: Simple threading
In-Reply-To: <4565BEAD.7080206@nospam.com>
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
	<4565BEAD.7080206@nospam.com>
Message-ID: <1164304832.984602.105440@j44g2000cwa.googlegroups.com>

many thanks - works perfectly now



From steve at holdenweb.com  Wed Nov  8 02:14:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 02:14:05 -0500
Subject: [DLC] ChiPy Monthly Meeting, Thursday 7:00 pm.
In-Reply-To: <023601c70300$2d1ce460$03000080@hendrik>
References: <1162921007.26531.275231865@webmail.messagingengine.com>	<eiqkpa$23c$1@sea.gmane.org>
	<023601c70300$2d1ce460$03000080@hendrik>
Message-ID: <eis01l$suh$1@sea.gmane.org>

Hendrik van Rooyen wrote:
>  "Steve Holden" <steve at holdenweb.com> wrote:
> 
> 
>>I don't suppose there's any chance that someone might be passing
>>Schaumberg on their way to this meeting? I'm teaching there, and a ride
>>would avoid me having to rent a car (and hence increase the probability
>>I'd make it).
> 
> 
> Where in the whole wide world is Schaumberg - "foam mountain" - is it near
> Koekenaap?
> 
It appears to be about twenty miles West and slightly North of the 
meeting venue. Zip code 60173, I believe, if that helps.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From chris at kateandchris.net  Wed Nov 22 14:50:30 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Wed, 22 Nov 2006 14:50:30 -0500
Subject: PyParsing and Headaches
In-Reply-To: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
References: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
Message-ID: <20061122195030.GC3929@kateandchris.net>

On Wed, Nov 22, 2006 at 11:17:52AM -0800, Bytter wrote:
> Hi,
> 
> I'm trying to construct a parser, but I'm stuck with some basic
> stuff... For example, I want to match the following:
> 
> letter = "A"..."Z" | "a"..."z"
> literal = letter+
> include_bool := "+" | "-"
> term = [include_bool] literal
> 
> So I defined this as:
> 
> literal = Word(alphas)
> include_bool = Optional(oneOf("+ -"))
> term = include_bool + literal
+ here means that you allow a space.  You need to explicitly override this.
Try:

term = Combine(include_bool + literal)

> 
> The problem is that:
> 
> term.parseString("+a") -> (['+', 'a'], {}) # OK
> term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
> recognize any token since I didn't said the SPACE was allowed between
> include_bool and literal.
> 
> Can anyone give me an hand here?
> 
> Cheers!
> 
> Hugo Ferreira
> 
> BTW, the following is the complete grammar I'm trying to implement with
> pyparsing:
> 
> ## L ::= expr | expr L
> ## expr ::= term | binary_expr
> ## binary_expr ::= term " " binary_op " " term
> ## binary_op ::= "*" | "OR" | "AND"
> ## include_bool ::= "+" | "-"
> ## term ::= ([include_bool] [modifier ":"] (literal | range)) | ("~"
> literal)
> ## modifier ::= (letter | "_")+
> ## literal ::= word | quoted_words
> ## quoted_words ::= '"' word (" " word)* '"'
> ## word ::= (letter | digit | "_")+
> ## number ::= digit+
> ## range ::= number (".." | "...") number
> ## letter ::= "A"..."Z" | "a"..."z"
> ## digit ::= "0"..."9"
> 
> And this is where I got so far:
> 
> word = Word(nums + alphas + "_")
> binary_op = oneOf("* and or", caseless=True).setResultsName("operator")
> include_bool = oneOf("+ -")
> literal = (word | quotedString).setResultsName("literal")
> modifier = Word(alphas + "_")
> rng = Word(nums) + (Literal("..") | Literal("...")) + Word(nums)
> term = ((Optional(include_bool) + Optional(modifier + ":") + (literal |
> rng)) | ("~" + literal)).setResultsName("Term")
> binary_expr = (term + binary_op + term).setResultsName("binary")
> expr = (binary_expr | term).setResultsName("Expr")
> L = OneOrMore(expr)
> 
> 
> -- 
> GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From irmen.NOSPAM at xs4all.nl  Tue Nov 21 18:06:43 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 22 Nov 2006 00:06:43 +0100
Subject: How good is CORBA?
In-Reply-To: <mailman.544.1164134192.32031.python-list@python.org>
References: <mailman.544.1164134192.32031.python-list@python.org>
Message-ID: <45638685$0$322$e4fe514c@news.xs4all.nl>

Sai Krishna M wrote:

> 
> I heard about CORBA... but also heard that it has some flaws...like
> the programming being very complicated.
> Also heard that CORBA is no more used these days...

CORBA's wire protocol (GIOP/IIOP) is heavily used in (java) EJB servers.


> Can someone suggest me a better option or is corba fine?

Well, if you are in a 100% python environment, I would suggest
to use Pyro instead (http://pyro.sf.net)
Or some other pure-Python RPC mechanism.

--Irmen


From gene.tani at gmail.com  Mon Nov 20 00:47:03 2006
From: gene.tani at gmail.com (gene tani)
Date: 19 Nov 2006 21:47:03 -0800
Subject: Secure Python
In-Reply-To: <ejmv71$k3e$1@kohl.informatik.uni-bremen.de>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<001501c70a50$440b4840$03000080@hendrik>
	<mailman.343.1163776096.32031.python-list@python.org>
	<ejmv71$k3e$1@kohl.informatik.uni-bremen.de>
Message-ID: <1164001623.334705.167430@e3g2000cwe.googlegroups.com>


Stephan Kuhagen wrote:
> Steve Holden wrote:
>
> > Anyone with an interest in secure Python should take a look at what
> > Brett Cannon is doing in his postgraduate work. There have been some
> > discussions on the python-dev list.
>
> Can you some links to his work, the discussions or some other starting
> point?
>

ok, here's how you can google python-dev.  cut/paste into the box

"site:mail.python.org/pipermail/python-dev/ brett cannon sandbox"



From katarzyna.bylec at gmail.com  Sun Nov 26 11:22:44 2006
From: katarzyna.bylec at gmail.com (Katarzyna Bylec)
Date: 26 Nov 2006 08:22:44 -0800
Subject: ANN: RuPy Ruby & Python Conference 2007
Message-ID: <1164558164.421675.302290@14g2000cws.googlegroups.com>

Hello,

we would like to invite you to one of the biggest Ruby and Python
events in
central-eastern Europe next year. RuPy Conference dedicated to Ruby and
Python programming languages will take place in April 14-15, 2007 in
Poznan,
Poland and the idea behind it is to put together experts with young
programmers and to support a good communication channel for East-West
exchange of prospective ideas.

If you think you have something interesting to present or some ideas to

share with other enthusiasts, we would be more then happy to welcome
you as
a Speaker. Proposals of lectures (i.e. title and short abstract) can be
submitted to rupy-talks at wmid.amu.edu.pl . <rupy-talks at wmid.amu.edu.pl>

Speakers' registration includes attendance at lecture sessions on both
days
of the Conference, all refreshments during the coffee breaks and
Conference
lunches. For each participant Organizers guarantee free accommodation
and
full board during the Conference. As a Speaker you will also be
entitled to
partial reimbursement for the travel expenses.You are also more than
welcome
to participate in all extra events including guided sightseeing,
conference
Banquet and other entertainments provided by Organizers.

All information can be found on RuPy website:
http://rupy.wmid.amu.edu.pl

Looking forward to seeing you in Poland,
RuPy Committee



From carsten at uniqsys.com  Thu Nov 16 11:24:35 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 16 Nov 2006 11:24:35 -0500
Subject: Yield
In-Reply-To: <1163693354.446751.38890@b28g2000cwb.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
	<eji19t$cak$1@south.jnrs.ja.net>
	<1163693354.446751.38890@b28g2000cwb.googlegroups.com>
Message-ID: <1163694275.3380.19.camel@dot.uniqsys.com>

On Thu, 2006-11-16 at 08:09 -0800, Danny Colligan wrote:
> > The more trivial the example, the harder it is to see the advantage.
> 
> I absoultely agree.  Thanks for pointing me out to some real-world
> code.  However, the function you pointed me to is not a generator
> (there is no yield statement... it just returns the entire list of
> primes).  A generator version would be:
> 
> >>> def primes(n):
> ...     if n<2: yield []
> ...     s=range(3,n+1,2)
> ...     mroot = n ** 0.5
> ...     half=(n+1)/2-1
> ...     i=0
> ...     m=3
> ...     while m <= mroot:
> ...         if s[i]:
> ...             j=(m*m-3)/2
> ...             s[j]=0
> ...             while j<half:
> ...                 s[j]=0
> ...                 j+=m
> ...         i=i+1
> ...         m=2*i+3
> ...     yield 2
> ...     for x in s:
> ...         if x: yield x

Not quite:
>>> x = primes(1)
>>> x.next()
[]
>>> x.next()
2
>>> x.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
StopIteration

To handle n<2 correctly, you have to "return" instead of "yield []".

>>> x = primes(1)
>>> x.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
StopIteration

-Carsten




From esj at harvee.org  Tue Nov  7 01:21:43 2006
From: esj at harvee.org (Eric S. Johansson)
Date: Tue, 07 Nov 2006 01:21:43 -0500
Subject: distutiles extension question
Message-ID: <eip8m1$3q6$1@sea.gmane.org>

How can I limit when my code run only when it's a build or install 
setup.py command and only after the setup method?

I need to do some processing after setup.py runs and I've been 
successful writing the code to do what I need but the problem is it runs 
every time I run setup.py regardless of the command following.

looking in build.py, I found and internal array called sub_commands and 
it looks like that would be a good place to add my postprocessing but I 
can't figure out quite how to get my code into the right context.

some pointers would be appreciated.  Thanks for your time.

---eric




From lardissone at gmail.com  Wed Nov 29 10:36:26 2006
From: lardissone at gmail.com (Leandro Ardissone)
Date: 29 Nov 2006 07:36:26 -0800
Subject: How to detect what type a variable is?
Message-ID: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>

Hi,

I want to know what type is a variable.
For example, I get the contents of an xml but some content is a list or
a string, and I need to know what type it is.

Thanks



From jorge.vargas at gmail.com  Sat Nov  4 08:38:03 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sat, 4 Nov 2006 13:38:03 +0000
Subject: WSDL?
In-Reply-To: <454ba334$0$12110$88260bb3@free.teranews.com>
References: <454ba334$0$12110$88260bb3@free.teranews.com>
Message-ID: <32822fe60611040538m31cfc73awb728243e9b2ada31@mail.gmail.com>

On 11/3/06, tobiah <st at tobiah.org> wrote:
> Is WSDL the right answer for in house communication
> between programs written in different languages, or
> is it more for publishing interfaces for use by parties
> outside your own company?
>
at work we use webservices (which is a better name) a lot for
"inhouse" but I work at a big company where other people look like if
they where another company ;)

as soring explained WSDL is a languaje to tell you what to do. the
idea behind it is that anyone can take it read it and write a client
for your service without even having help your your team.

so yes it can or as other people said you could just go with a lossier
webservice interface based on xmlrpc.

and please please don't go to corba we need to kill that.


From samantha7395 at hotmail.com  Fri Nov 17 05:56:14 2006
From: samantha7395 at hotmail.com (Samantha)
Date: Fri, 17 Nov 2006 02:56:14 -0800
Subject: Writing to Registry
References: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
	<12lq4cishnjid23@corp.supernews.com>
Message-ID: <w8CdnfxiEsfXCMDYnZ2dnUVZ_t2dnZ2d@adelphia.com>

That was the fix.
S

"Mark Elston" <m.elston at advantest-ard.com> wrote in message 
news:12lq4cishnjid23 at corp.supernews.com...
> Note:  this is untested (since I don't like screwing around
> in the registry...)
>
> Have you tried using REG_DWORD?
>
> Mark
>> 




From ronrsr at gmail.com  Fri Nov 10 12:09:41 2006
From: ronrsr at gmail.com (ronrsr)
Date: 10 Nov 2006 09:09:41 -0800
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <1163178336.281812.140580@f16g2000cwb.googlegroups.com>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>
Message-ID: <1163178581.231837.18120@h48g2000cwc.googlegroups.com>

thanks for the speedy answer.  what i meant was:

 return   MySQLdb.connect (host = "db91b.pair.com",
                           user = "homebase",
                            passwd = "Newspaper2",
			db = "homebase_zingers"
                           );


but even when I have that, I still get the same error.

bests, 

-rsr-

ronrsr wrote:
> here's some of t



From Tim.Golden at viacom-outdoor.co.uk  Wed Nov 22 07:43:19 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 22 Nov 2006 12:43:19 -0000
Subject: file backup in windows
In-Reply-To: <1164198227.681869.132540@j44g2000cwa.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B611@vogbs009.gb.vo.local>


| I am sorry I am providing the code i used as it is. Being newbee to
| programming I have tinkerd with various options i found on the net.

Thanks. That makes it a lot easier

[... snip ...]
| source = outlook_path
| #source = outlook_path +'\\*'
| print source

[...]

| win32file.CopyFile (source, target, 1)

| ---------
| output
| ----------
| C:\Documents and Settings\060577\Local Settings\Application
| Data\Microsoft\Outlook\*
| Successfully created directory D:\temp\outlook1_2006-11-22_17.41.54
| 
| Traceback (most recent call last):
|   File "C:\Documents and
| Settings\060577\kk\source_code\py\Mypy\pywin32test.py", line 34, in
| <module>
|     win32file.CopyFile (source, target, 1)
| error: (123, 'CopyFile', 'The filename, directory name, or 
| volume label
| syntax is incorrect.')


Fairly certain that the win32file.CopyFile API call doesn't
handle wildcards. You have to do that yourself. (I could be wrong).

Quick check:
<dump>
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os, sys
>>> import win32file
>>>
>>> os.chdir ("c:/temp")
>>> os.mkdir ("backup")
>>> win32file.CopyFile ("*.txt", "backup", 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
pywintypes.error: (123, 'CopyFile', 'The filename, directory name, or
volume label syntax is incorrect.')
>>>
>>> win32file.CopyFile ("temp.txt", "backup", 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
pywintypes.error: (2, 'CopyFile', 'The system cannot find the file
specified.')
>>>
>>> win32file.CopyFile ("exists.txt", "backup", 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
pywintypes.error: (5, 'CopyFile', 'Access is denied.')
>>> win32file.CopyFile ("exists.txt", "backup/exists.txt", 1)
>>>

</dump>

Sure enough:

1) Wildcards give the error you had
2) Non-existent file gives a suitable messag
3) Existing filename to folder name only gives Access denied
4) Existing filename to folder name + filename copies ok.

Now, that only took about a minute to run through on the interpreter
and check, so hopefully that'll help you out next time: create a
small test case (without all the long path names). Find out what
CopyFile can or can't do and act accordingly.

If you haven't already, look at the glob module:

http://docs.python.org/lib/module-glob.html

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
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________________________________________________________________________


From dlenski at gmail.com  Fri Nov 24 00:28:19 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 23 Nov 2006 21:28:19 -0800
Subject: beginner question about range with list and list
In-Reply-To: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>
References: <1164341231.638722.134130@m7g2000cwm.googlegroups.com>
Message-ID: <1164346098.984414.274600@l39g2000cwd.googlegroups.com>

erik gartz wrote:
> Doesn't {} allocate new memory for the
> dictionary each time? It almost appears as if the 2nd dictionary
> created overwrites the first one. Thanks for your help,
> Erik
>
> >>>
> >>> a = [[{}] *  3] * 2
> >>> a
> [[{}, {}, {}], [{}, {}, {}]]
> >>> for i in range(2):
> 	a[i][1] = {'x':i}
> >>> a
> [[{}, {'x': 1}, {}], [{}, {'x': 1}, {}]]
> >>>

You're right about both parts... sort of :-)

Each time that {} is EVALUATED, it allocates a brand new dictionary.
However you're using the list repetition operator (* n).  This operator
evaluates the list ONLY ONCE and then repeats that list n times.

The expression [{}]*3 will generate a list that contains the SAME
dictionary 3 times in a row.  The expression [[{}]*3]*2 will generate a
list that contains the SAME list twice in a row.  Thus, when you assign
to a[i][1], you are modifying a[0][1] and a[1][1], since a[0] and a[1]
are the same list.

The expression {'x':i} does indeed create a new dictionary each time it
is evaluated... however it gets assigned to the SAME list element each
time.

This is a fairly subtle point... if you want to make a new COPY of a
list (or other mutable object) rather than simply a new reference to
eat, you say a=b.copy() rather than just a=b.  The ability to have
multiple references to one object is general considered a feature in
most programming languages, once you get used to it!

If you want to generate a 2x3 array with each element a DISTINCT
dictionary belonging to a DISTINCT list, try this:

a = [[{} for j in range(3)] for i in range(2)]
for i in range(2):
  for j in range(3):
    a[i][j] = {'row': i, 'column': j}

Dan



From bdesth.quelquechose at free.quelquepart.fr  Thu Nov 23 15:01:31 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 23 Nov 2006 21:01:31 +0100
Subject: Trying to understand Python objects
In-Reply-To: <ek4e6j$hfn$1@panix3.panix.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<mailman.564.1164158130.32031.python-list@python.org>
	<ek4e6j$hfn$1@panix3.panix.com>
Message-ID: <4565f8f7$0$8460$426a74cc@news.free.fr>

Aahz a ?crit :
> In article <mailman.564.1164158130.32031.python-list at python.org>,
> Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
> 
>>Typically, classes are created as a subclass of another class. The
>>top-level basic type in Python is 'object', so if your class doesn't
>>make sense deriving from anything else, derive from 'object'.
>>
>>   class Point(object):
>>       pass
>>
>>Defining a class with *no* superclass is not recommended. If you don't
>>yet understand the difference between the above style (called a
>>"new-style" class) and the style you presented, you should always
>>derive from a superclass ('object' or something more specific) until
>>you encounter a situation where that causes a problem.
> 
> 
> Side note: I disagree with the above advice, but it's Thanksgiving and I
> don't have enough room on the margin for the proof.  I think classic
> classes are just fine.

Don't see it as a religious point please, but I fail to understand why 
you seem so in love with old-style classes ? new-style classes are the 
"official" Python object model since 2.2 (which is a few years ago now), 
and the last mandatory use of them (exceptions...) disappeared with the 
2.5. AFAIK, everything you do with old-style classes can be done with 
new-style ones. FWIW, old-style classes support is now only for backward 
compat. So *why* insisting on using them ?

wondering...


From jordan.taylor2 at gmail.com  Wed Nov  8 22:45:00 2006
From: jordan.taylor2 at gmail.com (Jordan)
Date: 8 Nov 2006 19:45:00 -0800
Subject: help using smtplib to work ..
In-Reply-To: <mailman.1940.1163027412.11739.python-list@python.org>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<mailman.1940.1163027412.11739.python-list@python.org>
Message-ID: <1163043900.508155.326250@h48g2000cwc.googlegroups.com>

Your post was definitely the most helpful for me.  For some reason,
smtp for gmail seems to require that you call server.ehlo() a second
time, after having called server.starttls(), otherwise, the server
won't accept authorization.  Thanks.

-Jordan


Gabriel Genellina wrote:
> At Wednesday 8/11/2006 19:23, NicolasG wrote:
>
> >I'm using the following code to send e-mail through python:
> >
> >import smtplib
> >
> >fromaddr = 'myMail at gmail.com'
> >toaddrs  = 'myOtherMail at gmail.com'
> >subject = 'someting for subject !'
> >
> >msg = 'This is body of the mail.'
> >
> >msg = 'From: ' + fromaddr + '\nTo: ' + toaddrs + '\nSubject:' + subject
> >+ '\n\n' + msg
> >print "Message length is " + repr(len(msg))
> >
> >server = smtplib.SMTP('smtp.gmail.com')
> >server.set_debuglevel(1)
> >server.sendmail(fromaddr, toaddrs, msg)
> >server.quit()
> >
> >send: 'mail FROM:<myMail at gmail.com> size=106\r\n'
> >reply: '530 5.7.0 Must issue a STARTTLS command first
> >s1sm7666914uge\r\n'
> >
> >What am I doing wrong ?
>
> gmail.com requires authentication before sending mail. Try this
> sequence: ehlo, starttls, ehlo (again!), login, sendmail, quit
> (BTW, you need a space after Subject:, and all \n should be \r\n)
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar



From larry.bates at websafe.com  Fri Nov  3 11:11:02 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Nov 2006 10:11:02 -0600
Subject: Best way to have intermediate object description format
In-Reply-To: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
References: <1162534260.948002.59780@h48g2000cwc.googlegroups.com>
Message-ID: <o9mdnZUHN4mJ99bYnZ2dnUVZ_q6dnZ2d@comcast.com>

jm.suresh at no.spam.gmail.com wrote:
> Hi,
>  Is there any standard text format for storing data of object oriented
> nature.
>  The text file should be readable.
> 
> That is, Is there any better way than having to write out a file like
> this from the original place and read it in python and process it.
> 
> #----------------------------
> world = World(name='MyWorld')
> world.objects.append(Box(color='red'))
> world.objects.append(Circle(color='green'))
> world.someProp = "123"
> #-----------------------------
> 
> Thanks.
> Suresh
> 
While it is a little hard to determine your exact use case, I'll
try.  I have an application that dynamically creates objects from
.INI configuration file.  I use ConfigParser to process it.  The
entries are something like the following:

[world_MyWorld]
object_001=Box(color='red')
object_002=Circle(color='green')
property_someProp=123
property_someOtherProp=XYZ

I then read using ConfigParser and use list comprehensions to isolate
what I'm looking for in the file. Code not tested, but should serve as
and example and I think you will get the idea.  Note: Please don't get
too caught up in "premature optimization".  I use this to process .INI
files with thousands of lines and it goes through the process in fractions
of a second.

-Larry


Sample Code (written completely from my memory):

INI=ConfigParser.ConfigParser()
INI.read(inifilepath)
#
# Get a list of the world sections in the .INI file
#
world_sections=[section for section in INI.sections()
                if section.beginswith('world')
.
. Get lists of any other objects/sections here
.
#
# Create a list to store your instances of world_objects
#
world_instances=[]
#
# Loop over all the sections in the .INI file that create world objects
#
for section in world_sections:
    #
    # Isolate the name of this world object
    #
    name=section.split('_')[1]
    obj=World(name=name)
    #
    # Create a list to store world instance objects here
    #
    world_objects=[object for object in INI.options(section)
                   if object.startswith('object')]
    #
    # Loop over all the instance objects defined and append them here
    #
    for object in world_objects:
        #
        # Use eval to create object then append it.  Note: eval is
        # dangerous if you don't control the .INI file.  Untrusted .INI
        # file could have eval doing BAD things.
        #
        obj.append(eval(object))
    #
    # Create a list to store world instance properties here
    #
    world_properties=[object for object in INI.options(section)
                   if object.startswith('property')]
    #
    # Loop over all the instance objects defined and append them here
    #
    for property in world_properties:
        value=INI.get(section, property)
        property_name=property.split('_')[1]
        #
        # Use setattr to set the property
        #
        setattr(obj, property_name, value)

    #
    # Append this world object onto the list
    #
    world_instances.append(obj)


From luismgz at gmail.com  Thu Nov 16 07:59:09 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 16 Nov 2006 04:59:09 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <unvs24-8fi.ln1@lairds.us>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
Message-ID: <1163681949.338244.323390@k70g2000cwa.googlegroups.com>


Cameron Laird ha escrito:

> In article <1163559359.010787.185840 at m73g2000cwd.googlegroups.com>,
> Luis M. Gonz?lez <luismgz at gmail.com> wrote:
> 			.
> 			.
> 			.
> >Then look no further. Learn python and go kick php developers asses in
> >the market place.
> >There are thousands of php developers out there. Do you want to be just
> >one more?
> >I'd rather learn something newer, and much more powerful.
> 			.
> 		[more Python
> 		cheerleading]
> 			.
> 			.
> Perhaps it's timely to clarify the "newer" above:  Guido
> made Python public in '89-90, and Rasmus showed PHP to
> others in '94-95.

OK. But since when has python been considered a viable alternative for
web development?
As a generalp purpose language, it's older.
But as a web development language, it's olnly when people started to
look for the "rails killer" and many python alternatives started to
come up (although Django has been in development for a long time before
all this hype).
I remember well, just a few months ago, there were many alternatives
(remember "subway"?).



From nkanthikiran at gmail.com  Wed Nov 22 06:58:08 2006
From: nkanthikiran at gmail.com (k.i.n.g.)
Date: 22 Nov 2006 03:58:08 -0800
Subject: file backup in windows
In-Reply-To: <mailman.581.1164189748.32031.python-list@python.org>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
	<mailman.581.1164189748.32031.python-list@python.org>
Message-ID: <1164196688.000016.25350@e3g2000cwe.googlegroups.com>

Thank You all for reply's so far

> <code>
> import os, sys
> from win32com.shell import shell, shellcon
>
> local_app_data = shell.SHGetSpecialFolderPath (0,
> shellcon.CSIDL_LOCAL_APPDATA)
> outlook_path = os.path.join (local_app_data, "Microsoft", "Outlook")
>
> print outlook_path
>
> </code)
>

The above code was fine while printing, when I am trying to use this
(outlook_path) to use as source path it is giving file permission error

can you please clarify this



From bmichel at gmail.com  Wed Nov 22 10:05:25 2006
From: bmichel at gmail.com (bmichel at gmail.com)
Date: 22 Nov 2006 07:05:25 -0800
Subject: XML Validation in Python using XSV
In-Reply-To: <45645F93.7050907@web.de>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
	<45644E9A.3030209@web.de>
	<1164202262.974495.289490@f16g2000cwb.googlegroups.com>
	<45645F93.7050907@web.de>
Message-ID: <1164207925.488546.265120@h54g2000cwb.googlegroups.com>

I've read a bit about lxml, didn't found anything related to validating
XML schema...

Maybe you can give more details on how to install lxml and use it in
Python to validate XML files against an XML Schema
I'm going to ask the server administrator to install lxml, so I can't
play around a lot with the system trying stuff.

It would be nice if you can tell me:
- What files to download, where to download them from
- How to install it and configure it
- How to import the functions in Python

Thanks again
Michel

Stefan Behnel wrote:
> > bmichel at gmail.com wrote:
> > Stefan Behnel wrote:
> >> BTW: any reason you need to use XSV? There are some other libraries out there
> >> that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
> >> much more powerful than XSV.
> >
> > No particular reason for XSV
> > I just want to validate XML files against an XML schema through Python.
> > If you can suggest any other package for debian, I'll be glad to try
> > it.
>
> Well, as I said:
>
> http://packages.debian.org/unstable/python/python-lxml
> http://codespeak.net/lxml/
> 
> Just try "apg-get install python-lxml".
> 
> Stefan



From fredrik at pythonware.com  Sat Nov 18 07:43:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 13:43:28 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <FaC7h.73$_H5.19@tornado.texas.rr.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org><1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<mailman.408.1163844581.32031.python-list@python.org>
	<FaC7h.73$_H5.19@tornado.texas.rr.com>
Message-ID: <ejmv5g$6n4$1@sea.gmane.org>

Paul McGuire wrote:

> maybe time to switch to decaf... :)

do you disagree with my characterization of the state of the XML universe?

</F>



From duncan.booth at invalid.invalid  Mon Nov 20 03:25:06 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Nov 2006 08:25:06 GMT
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <Xns988155A19F30duncanbooth@127.0.0.1>

Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> wrote:

> take(n,iterable) -> iterator
>      returns a iterator over the first n
>      elements of the iterator

Isn't this just the same as itertools.islice(iterable, n) ?

> drop(n,iterable) -> iterable
>      drops the first n elemetns of iterable and
>      return a iterator over the rest

and this looks to be the same as itertools.islice(iterable, n, None)

Can you give use cases for 'heads' and 'tails'? I'm curious why you would 
want them.


From deets at nospam.web.de  Mon Nov 13 11:07:39 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Nov 2006 17:07:39 +0100
Subject: Character Encodings and display of strings
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
	<mailman.62.1163428860.32031.python-list@python.org>
	<1163429791.517778.46220@f16g2000cwb.googlegroups.com>
Message-ID: <4rrjibFspqicU3@mid.uni-berlin.de>

JKPeck wrote:

> Thanks for the quick answer.  I thought repr was involved here, but
> when I use repr explicitly I get a notation where the backslashes are
> escaped.  I also though that with the encoding explictily declared in
> the source, that repr would take that into account and use the
> character form, but obviously it doesn't.

The encoding in the source has nothing to do with that. How should an
encoding (and possibly a gazillion different ones in gazillion other
sourcefiles of yours) influence the list repr code?

The encoding in the source-file is solely used to correctly parse unicode
literals, as these need a specific encoding to be generated from the
byte-string they are in the sourcecode.

Diez


From skip at pobox.com  Sat Nov 18 11:25:06 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 18 Nov 2006 10:25:06 -0600
Subject: decompiler
In-Reply-To: <1163864577.987875.64990@m7g2000cwm.googlegroups.com>
References: <1163864577.987875.64990@m7g2000cwm.googlegroups.com>
Message-ID: <17759.13282.952822.722806@montanaro.dyndns.org>


    jim> where can I find a free decompile that I can run in windows xp

Kind of dated perhaps, but google for "decompyle".

Skip


From dananrg at yahoo.com  Tue Nov  7 16:00:22 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 7 Nov 2006 13:00:22 -0800
Subject: More elegant way to obtain ACLs / permissions for windows directories
	than using "cacls" dos command?
Message-ID: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>

Is there a standard library module in Python 2.4 (Win32) that will
return directory permissions / ACLs (e.g. users, groups, and what
rights they have)?

Otherwise, I'm faced with sending "cacls dirName" commands via os.popen
as below, and then parsing and comparing the text output.

Basically, I'd like to compare what the ACLs a directory should have
against what the actual ACLs are.

Here's what I started with:

import os           # Cross-platform filesystem manipulation

rootDir = "S:\someRootDirectoryHere"

print "*** Printing DIRECTORY names beneath directory " + rootDir + "
***\n"
for dirpath, dirnames, filenames in os.walk(rootDir):
    for dirNm in dirnames:
        theDirPath = os.path.join(dirpath, dirNm)
        print '"' + theDirPath +'"'
        # cacls needs double-quotes around space-containing paths
        result = os.popen("cacls " + '"' + theDirPath + '"')
        # Print the security info (ACLs)for specified directory
        print result.read()

Thanks.



From sturlamolden at yahoo.no  Sun Nov  5 18:29:08 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 5 Nov 2006 15:29:08 -0800
Subject: RAW network programming under Windows
In-Reply-To: <1162759117.346975.255000@f16g2000cwb.googlegroups.com>
References: <1162759117.346975.255000@f16g2000cwb.googlegroups.com>
Message-ID: <1162769348.785276.294790@h48g2000cwc.googlegroups.com>


billie wrote:

> RAW network programming under Windows it's not always possible because
> of the security limitations that microsoft introduced in the latest
> Windows versions and that affects WinSocket API.
> On UNIX systems I'm able to freely send raw packets (for example I'm
> able to compile IP packets with a src address defined by me) through
> raw socket API, but if I do the same on a Windows system socket module
> raises an error.

You can try to install "Windows Services for Unix 3.5" (aka SFU 3.5).
It transforms your Windows into a certified UNIX (not just a Unix
clone). SFU 3.5 has a full BSD socket API (derived from OpenBSD), not
just Winsock. As the POSIX subsystem in SFU 3.5 is not layered on top
of the Win32 subsystem, but talks directly to the NT kernel,
restrictions in Winsock should not affect the BSD sockets in SFU 3.5.
This behaviour is different from e.g. Cygwin, where the "Unix APIs" are
layered on top of the Win32 subsystem.

In any case, I hope you are aware that spoofing IP packets gives you
bad karma.



From fredrik at pythonware.com  Mon Nov 13 04:12:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 10:12:04 +0100
Subject: httplib.InvalidURL: nonnumeric port: For characters in the proxy
	password in URL
In-Reply-To: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
Message-ID: <ej9ctb$8jm$1@sea.gmane.org>

Phoe6 wrote:
> Hi,
>      The following piece of code works properly when my proxy password
> contains characters[a-zA-Z0-9] etc. But when my proxy password
> contained something like '|\/|' , the httplib incorrectly indentified
> it as separator.

if you want to prevent the URI parser from treating something as part of 
the URI, you need to quote it:

    pwd = urllib.quote(pwd, "")

</F>



From sumrnot at hotmail.com  Wed Nov  1 23:48:12 2006
From: sumrnot at hotmail.com (Geoffrey Summerhayes)
Date: 1 Nov 2006 20:48:12 -0800
Subject: logo design
In-Reply-To: <oWd2h.120$Rj2.118@newsfe10.lga>
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
	<1162432978.995731.291980@f16g2000cwb.googlegroups.com>
	<oWd2h.120$Rj2.118@newsfe10.lga>
Message-ID: <1162442892.041281.321270@i42g2000cwa.googlegroups.com>


Ken Tilton wrote:
> alex23 wrote:
> > Xah Lee wrote:
> >
> >>No personal offense intended, but human animal's history is what? 3000
> >>years at least in recorded history? And, all you can think of is what,
> >>the view points of a fraction of your personal life span?
> >
> >
> > Thank god evolution spat you out to lead us all to the light, huh?
> >
> > No personal offense intended, but you're a boring, elitist prick.
>
> Actually, no, Xah is pretty cool, give him a chance.

Yeah, this still seems kind of silly though. Implementations,
companies and user groups have logos, not languages.

Picture this: Hey, I'm switching to COBOL because its new
logo looks great on t-shirts and mugs.

----
Geoff



From gisdudester at gmail.com  Fri Nov  3 10:40:09 2006
From: gisdudester at gmail.com (GISDude)
Date: 3 Nov 2006 07:40:09 -0800
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
Message-ID: <1162568409.144421.262160@e3g2000cwe.googlegroups.com>

Mike,
I totally forgot that MS Works was out there. Haven't used that one in
about 6 or 7 years. Honestly, your best bet is to convert to .csv or
some delimited .txt file. Once that is done, all your rows/columns will
be "nice and neat" .
Once that is done, (and since your client doesn't have ACCESS, try
MYSQL or POSTGRESQL(they are open source). They can handle A LOT OF
DATA, so however big your orginal DB is, you can import it to one of
these more than capable OS freebie Databases.

Good luck
Michael B. Trausch wrote:
> I was wondering if anyone has had any experience with this.  Someone I
> know is trying to move away from Microsoft Works, and I am trying to
> look into a solution that would convert their data in a lossless fashion
> to a more modern format.  The database has more than 65K rows, so
> converting it to be an Excel spreadsheet, would, AFAIK, not be an option.
>
> It would seem that MS Works can export the database as a DBF format
> database, though I have not tried it.  Before I get started, I was
> wondering if anyone has been through this problem in the past and used
> Python to solve the problem.  Knowing nearly nothing about the DBase
> family of application software, and database formats, I find myself
> feeling like the information out there is, frankly, a bit overwhelming.
>
> Would the recipe specified in the "dbf to csv" thread be useful here for
> a file in DBase IV format?  It of course uses the same extension, but I
> am not sure if the file semantics are at all similar.  The idea at the
> end would be to probably create a database on an small SQL server (like
> MySQL) and let the person access their data using ODBC on their Windows
> workstation so that they can create form letters and the like.  They do
> not have access to MS Office's Access product, nor do they wish to use
> OOo Base (and I can't say that I blame them -- it seems to crash far too
> often to be considered reliable stuff).
> 
> 	-- Mike



From larry.bates at websafe.com  Mon Nov 27 14:10:05 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 27 Nov 2006 13:10:05 -0600
Subject: python skipping lines?
In-Reply-To: <1164653920.282736.139870@j44g2000cwa.googlegroups.com>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>
	<456B338D.4050408@NOSPAMwit.edu>
	<1164653920.282736.139870@j44g2000cwa.googlegroups.com>
Message-ID: <PpadnTgH-5tiqvbYnZ2dnUVZ_sydnZ2d@comcast.com>

lisa.engblom at gmail.com wrote:
> thats easy enough to solve
> 
> """test text.py
> for playing around with my text editing task
> """
> 
> UnitList = open('/Python25/working/FacList.txt', 'r')
> RawData = open('/Python25/working/data.txt', 'r')
> Output = open('/Python25/working/output.txt', 'a')
> 
> def PullHourlyData(filename, facility, unit):
>         for line in filename:
>                 data = line.split('","')
>                 CurrentFacility = data[1]
>                 CurrentUnit = data[3]
>                 CurrentSO2Mass = data[9]            #in lb/hour
>                 #print CurrentFacility
>                 #print CurrentUnit
> 
>                 if facility == CurrentFacility and unit == CurrentUnit:
> 
>                         #print >> Output, '"%s", "%s", "%s"' %
> (CurrentFacility, CurrentUnit, CurrentSO2Mass)
>                         print '"%s", "%s", "%s"' % (CurrentFacility,
> CurrentUnit, CurrentSO2Mass)
>                 else:
>                         print facility
>                         print unit
>                         print CurrentFacility
>                         print CurrentUnit
>                         print "\n"
> 
> 
> counter = 0
> 
> for combos in UnitList:
>         print counter
>         FandU = combos.split('","')
>         #print combos
>         FacilityName = FandU[0]
>         UnitName = FandU[1]
>         #print FacilityName
>         #print UnitName
>         FacilityName = FacilityName.strip('"')
>         UnitName = UnitName.strip('",\n')
>         print FacilityName
>         print UnitName
> 
>         PullHourlyData(RawData, FacilityName, UnitName)
>         counter += 1
> 
> 
> UnitList.close()
> RawData.close()
> Output.close()
> print "Done!"
> 
> Jordan Greenberg wrote:
>> lisa.engblom at gmail.com wrote:
>>> Hi,
>> <SNIP>
>>> Any ideas of what could be the problem?
>>>
>> Hard to say without seeing your code.
>>
>> Jordan Greenberg
>>
>> -- 
>> Posted via a free Usenet account from http://www.teranews.com
> 

The first time through the loop you read through RawData and are at
the bottom of the file.  You either need to seek back to the beginning
or you need to close and reopen the file each time through the loop.

Suggestions:

1) In PullHourData the first argument is filename.  In fact
it is not a filename but rather a file pointer.  Just a little
confusing for anyone coming along behind you.

2) If the data is well-formed CSV you should probably take a look
at the csv module.  It handles CSV data better than splitting on
commas (which can be dangerous as there can be commas inside of
literal data).

-Larry


From omelnyk at gmail.com  Tue Nov 14 18:04:22 2006
From: omelnyk at gmail.com (Olexandr Melnyk)
Date: Wed, 15 Nov 2006 01:04:22 +0200
Subject: Python v PHP: fair comparison?
In-Reply-To: <n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<n7ednR8CE4CHosfYnZ2dnUVZ_vCdnZ2d@comcast.com>
Message-ID: <d5f60f0c0611141504h7f0ccdc9h388ca13528b8858d@mail.gmail.com>

2006/11/15, Larry Bates <larry.bates at websafe.com>:
> For the most part you wouldn't ever thing about writing data
> conversion programs, GUI applications, Windows services, COM+ objects,
> Linux daemons, simple scripts, socket server/client applications,
> etc. in PHP (but all can be done in Python).  Web apps are just one of
> the many applications that Python can tackle.  PHP is normally
> relegated to dynamic web page creation and database interfacing of
> a web application.  I've never seen it promoted as a language
> that can be used to develop a standalone non-web browser based
> application (but I'm sure someone will tell me that it can be used
> that way ;-).
Yes, it can.

> > I'd be surprised if there was more demand for PHP developers
> > than Python developers.  Google lists 51 PHP jobs and 168
> > Python jobs in their internal jobs database (I just did a
> > quick search).

> Yes, but Google is the company that hired Guido, and that does most of
> it's dev in python.

Yes, Python is number 3 language at Google, so it explains the numbers a
bit.

> PHP has a lower barrier to entry

I don't think so. Python has more intuitive syntax for beginners and is one
of the best choices for the first programming language to pick up.

------------------------------
Olexandr Melnyk,
http://omelnyk.net/
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From no-spam at no-spam-no-spam.invalid  Fri Nov 24 11:17:29 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 17:17:29 +0100
Subject: Pimping the 'cgi' module
In-Reply-To: <4sohsgFvqh5uU1@mid.individual.net>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<mailman.670.1164364120.32031.python-list@python.org>
	<ek6ncq$7pp$1@news.albasani.net>
	<mailman.674.1164373472.32031.python-list@python.org>
	<4sohsgFvqh5uU1@mid.individual.net>
Message-ID: <ek75ut$2hb$1@news.albasani.net>

Thomas Guettler wrote:
> Christoph Haas wrote:
> ...
>> Oh, yeah. I just joined the Web SIG and found out that WSGI
>> seems the way
>> to go.
> ...
> 
> I don't want a standard, i want *one* implementation. In the
> Java world, there are a lot of standards and N*standards 
> implementations. In the end you have the opposite of what
> a standard should give you: Bad interopability.
>
> One implemantation (which is in the standard library) would
> be the right coice. But what could I do? (I am not a python
> core developer)? I could only create a new web framework.
> And that's why there are so many.
> 
> I hope Guido (or someone else who can do this) will decide to choose one
> soon. 

yes. this talking about formation of somewhat a standardization gremium within some years etc. is not the task.
There is enough base material. There are guys who have an overview of what is good. There are guys who know the details.
A decision call from the inner circle for an actual (probably joint) implementation is necessary.

Regarding the python-on..-"framework" the greatest danger would be, to make it too big. ( its not about full replacement of the existing big packages )

Robert


From paddy3118 at netscape.net  Wed Nov  1 15:40:09 2006
From: paddy3118 at netscape.net (Paddy)
Date: 1 Nov 2006 12:40:09 -0800
Subject: Style for modules with lots of constants
In-Reply-To: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
Message-ID: <1162413609.110488.277850@e64g2000cwd.googlegroups.com>


Neil Cerutti wrote:
> The Glk API (which I'm implementing in native Python code)
> defines 120 or so constants that users must use. The constants
> already have fairly long names, e.g., gestalt_Version,
> evtype_Timer, keycode_PageDown.
>
> Calls to Glk functions are thus ugly and tedious.
>
>     scriptref = glk.fileref_create_by_prompt(
>             glk.fileusage_Transcript | glk.fileusage_TextMode,
>             glk.filemode_WriteAppend, 0)
>
> Please give me some good style advice for this situation.
>
> I know some modules are designed to be used as 'from XXX import
> *'. Since the Glk API is heavily influenced by its inception in
> C this might not be a huge problem. All the functions in the API
> have glk_ prepended, since C has no namespaces. I think it makes
> sense to stick the glk_'s back on the functions and instruct
> users to 'from Glk import *', but I know it doesn't conform with
> Python practice, and Python has plenty of modules that were
> originally designed in C, but don't insist on polluting the
> global namespace.
>
> Would it better to use strings instead? Some Python builtins use
> them as a way to avoid creating of global constants.
>
>     scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
>             'WriteAppend', 0)
>
> Parsing the combinable bitfield contants might be slowish,
> though.
>
> Thanks for taking the time to consider my question.
>
> --
> Neil Cerutti
> For those of you who have children and don't know it, we have a
> nursery downstairs. --Church Bulletin Blooper

I'd check the C code to first see if I could extract the C constant
definitions and automatically   convert them into Python names vvia a
short program. That way, I'd remove any transcription errors.

I favour the constants class mentioned by others , but would not mess
with any of the long constant names as it helps those who know the
original C, and also helps when users need to rely on original C
documentation.

- Pad.



From bootiack at yahoo.com  Sat Nov 18 04:57:28 2006
From: bootiack at yahoo.com (gavino)
Date: 18 Nov 2006 01:57:28 -0800
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163810800.915170.48580@e3g2000cwe.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
	<1163810800.915170.48580@e3g2000cwe.googlegroups.com>
Message-ID: <1163843848.694028.85940@m7g2000cwm.googlegroups.com>



On Nov 17, 4:46 pm, sandra.el... at gmail.com wrote:
> On Nov 17, 12:07 pm, "walterbyrd" <walterb... at iname.com> wrote:
>
> > I think I have read somewhere that using Python to develop
> > web-applications requires some restarting of the Apache server, whereas
> > PHP does not.It depends what you do. CGI's operate much like PHP. mod_python has
> auto-reloading (and by implication most frameworks that build on it.) A
> poorly designed web application may require a restart. (Some people
> also disable auto-reload for production servers for performance
> advantages.)
>
> > Also, I seem to remember reading something about PHP being able to
> > recover from Apache restarting  more easily than Python.I can think of no reason why that would be true. Perhaps these are
> poorly designed python applications?
>
> > I am not trying to suggest anything here. I'm just asking.Ask away. The only bad question is an unasked question. Most of us can
> act like adults here (although we all forget that from time to time.)
>
> Python is much better suited to writing and mainting large web
> applications though. Being both an experienced php and python
> programmer, I can tell you I don't use php any more unless I have no
> other choice.
>
> -Sandra

Sandra do you us ethe msot up to date php and python?
how fast is fastcgi v mod_python?
Have you ever used medusa? or some other python server directly?



From grante at visi.com  Mon Nov  6 10:48:39 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 06 Nov 2006 15:48:39 -0000
Subject: Timer Usage
References: <1162794823.678654.55620@i42g2000cwa.googlegroups.com>
Message-ID: <12kumanj887lf14@corp.supernews.com>

On 2006-11-06, chewjeremy at gmail.com <chewjeremy at gmail.com> wrote:

> I'm planning to do C++ development together with Python on
> Linux. I understand that Linux allows only one timer per
> process. Does Python use the Linux timer?

No.

> If so, how do I use the timer without interfering with Python?

-- 
Grant Edwards                   grante             Yow!  I feel real
                                  at               SOPHISTICATED being in
                               visi.com            FRANCE!


From JohnRemfry at yahoo.de  Sun Nov  5 15:37:46 2006
From: JohnRemfry at yahoo.de (John Remfry)
Date: Sun, 5 Nov 2006 21:37:46 +0100
Subject: [newbie] conditional imports
Message-ID: <003901c7011a$41adb8b0$0701a8c0@maininfrance>

?

--
No virus found in this outgoing message.
Checked by AVG Free Edition.


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From hg at nospam.com  Wed Nov 22 11:17:26 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 10:17:26 -0600
Subject: Python visual IDE
In-Reply-To: <1164211512.078332.73450@e3g2000cwe.googlegroups.com>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
	<1164205868.349589.217040@k70g2000cwa.googlegroups.com>
	<1164206609.276356.165670@m73g2000cwd.googlegroups.com>
	<_DZ8h.3237$pM.2926@newsfe13.lga>
	<1164211512.078332.73450@e3g2000cwe.googlegroups.com>
Message-ID: <GN_8h.1962$%_2.567@newsfe19.lga>

Yes,

Actually when you create the project from wxDesigner, the "main" will
also be generated for you ... then you include the correct files in
eclipse (note that one file never needs to be edited ... like glade).

I went for wxDesigner years ago when wxglade was fairly unstable ...
have not tested it lately.

wxDesigner has its own editor (so you can say it is a complete
environment) ... but I only use it to automatically generate classes,
events ... as eclipse+pydev bring much more to the picture.


I really do not regret the expense.

PS: wxDesigner will also generate code for other languages (never tried)
 : c++, c#, perl
PPS: I'm not getting any money from them  ;-)

hg




king kikapu wrote:
> I didn't know about this product you mention (wxDesigner).
> I download the trial and it seems pretty good, reminds me the wxGlade.
> 
> So you make the GUI in this, generate Python code and import the module
> 
> on your main project and reference it respectively ??
> 
> On Nov 22, 4:58 pm, hg <h... at nospam.com> wrote:
>> king kikapu wrote:
>>> I have already downloaded and seen the trial of Komodo Professional.
>>> Indeed it has a simple Gui Builder but one can only use TKinter on it.
>>> No wxWidgets support and far from truly RAD, but it is the only
>>> "integrated"
>>> GUI builder in these IDEs...
>>> On Nov 22, 4:31 pm, "Steve" <s... at ferg.org> wrote:
>>>> I haven't used it but Komodo (Professional version) says it has:
>>>> ActiveState GUI Builder (Komodo Professional only)
>>>> Enhance your applications with GUI dialogs: Simple, Tk-based dialog
>>>> builder with seamless round-trip integration, for Perl, Python, Ruby,
>>>> and Tcl.I do a lot of GUI programming with wxPython.
>> I find that switching from desktop 1 (Eclipse/PyDev) to desktop 2
>> (wxDesigner) becomes a reflex quite quickly ... even under Windows
>> thanks to virtuawin (http://virtuawin.sourceforge.net) - both packages
>> also are smart enough to notice when an open file has been modified
>> elsewhere.
>>
>> I also program in Visual-Studio and overall do not find the RAD/IDE
>> integration that much more convenient.
>>
>> Also, I generally get the job done in wxDesigner at the beginning of the
>> project, and seldom have to get back into it to twick the interface.
>>
>> hg- Hide quoted text -- Show quoted text -
> 


From nitte.sudhir at gmail.com  Mon Nov  6 02:00:43 2006
From: nitte.sudhir at gmail.com (kath)
Date: 5 Nov 2006 23:00:43 -0800
Subject: how do I pass values between classes?
In-Reply-To: <454C9ECF.5020806@websafe.com>
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
	<454C9ECF.5020806@websafe.com>
Message-ID: <1162796443.570347.91760@e3g2000cwe.googlegroups.com>

hi, Larry Bates .... thanks for the reply...

> You might consider doing it the same way wx passes things around.
> When you instantiate the subclass pass the parent class' instance
> as first argument to __init__ method.

Yes thats absolutely right..

> That way the subclass can
> easily pass values back to the parent by using that pointer.

Could you please explain me this.. more clearly. I think it is much
close to the solution.


Thank you.
regards, sudhir



From smithj at rpath.com  Tue Nov 28 20:48:38 2006
From: smithj at rpath.com (Jonathan Smith)
Date: Tue, 28 Nov 2006 20:48:38 -0500
Subject: why would anyone use python when java is there?
In-Reply-To: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
Message-ID: <456CE6F6.20403@rpath.com>

gavino wrote:
> wtf

Java is a coffee, and coffee comes from exploited Ethiopians (they do
have some damn fine coffee, though). Most of us prefer to exploit
Englishmen instead. (damn them and their humor!)

-smithj




From no-spam at no-spam-no-spam.invalid  Sun Nov 12 13:37:34 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 12 Nov 2006 19:37:34 +0100
Subject: numpy/scipy: correlation
In-Reply-To: <1163351475.742836.311180@h48g2000cwc.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
Message-ID: <ej7plg$sa7$1@news.albasani.net>

sturlamolden wrote:
> First, are you talking about rounding error (due to floating point
> arithmetics) or statistical sampling error?

About measured data. rounding and sampling errors with special distrutions are neglegible. Thus by default assuming gaussian noise in x and y. 
(This may explain that factor of ~0.7 in the rectangle M.C. test)
The (x,y) points may not distribute "nicely" along the assumed regression diagonale.

> If you are talking about the latter, I suggest you look it up in a
> statistics text book. E.g. if x and y are normally distributed, then
> 
> t = r * sqrt( (n-2)/(1-r**2) )
> 
> has a Student t-distribution with n-2 degrees of freedom. And if you
> don't know how to get the p-value from that, you should not be messing
> with statistics anyway.

yet too lazy/practical for digging these things from there. You obviously got it - out of that, what would be a final estimate for an error range of r (n big) ?   
that same "const. * (1-r**2)/sqrt(n)" which I found in that other document ?

The const. ~1 is less the problem. 

My main concern is, how to respect the fact, that the (x,y) points may not distribute well along the regression line. E.g. due to the nature of the experiment more points are around (0,0) but only few distribute along the interesting part of the diagonale and thus few points have great effect on m & r. above formulas will possibly not respect that.
I could try a weighting technique, but maybe there is a (commonly used) speedy formula for r/r_err respecting that directly?


Robert


From andrea.gavana at gmail.com  Tue Nov 14 16:42:36 2006
From: andrea.gavana at gmail.com (Andrea Gavana)
Date: Tue, 14 Nov 2006 22:42:36 +0100
Subject: PyWin32-winxptheme and py2exe
Message-ID: <d5ff27200611141342u4e91089bvbc49ecfa9fbd8857@mail.gmail.com>

Hi all,

   I am having some troubles mixing py2exe and winxptheme. Basically,
I am using wxPython 2.7.2.0 with Python 2.5, and painting some window
background using the UxTheme via winxptheme. This is what I am doing:

hwnd = MyWindow.GetHandle()
self.hTheme = winxptheme.OpenThemeData(hwnd, "Window")

winxptheme.DrawThemeBackground(self.hTheme, dc.GetHDC(), 5, 1,
                              (rc.top, rc.left, rc.right, rc.bottom), None)


This works very well using python directly, but when I generate and
executable file with py2exe, I get this error when executing that last
line:

TypeError: an integer is required

This is because self.hTheme is *None*. It seems like OpenThemeData can
not be initialized in an executable, or at least that I am not able to
do it.
Does anyone have a possible solution to this problem? I have tried all
the possibilities with py2exe, meaning bundle=1, bundle=2, bundle=3,
compressed=1, compressed=2, every possible combination. But it doesn't
work :-(

I attach my setup file, if it can be of any help.

Thank you very much for every pointer.


-- 
Andrea.

"Imagination Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/
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From grflanagan at yahoo.co.uk  Mon Nov  6 17:10:54 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 6 Nov 2006 14:10:54 -0800
Subject: assigning values in __init__
In-Reply-To: <454faf57$0$12993$c3e8da3@news.astraweb.com>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <1162851054.306342.229630@k70g2000cwa.googlegroups.com>


John Salerno wrote:
> Let's say I'm making a game and I have this base class:
>
> class Character(object):
>
>      def __init__(self, name, stats):
>          self.name = name
>          self.strength = stats[0]
>          self.dexterity = stats[1]
>          self.intelligence = stats[2]
>          self.luck = stats[3]
>
> Is this a good way to assign the values to the different attributes?
> Should 'stats' be a list/tuple (like this), or should I do *stats instead?
>

How about:

class Character(object):

    def __init__(self, name, **kwargs):
        self.name = name
        self.__dict__.update(kwargs)

c = Character( "Plato", strength=10, luck=12)

print getattr(c, "strength")
print getattr(c, "luck")

10
12



From bj_666 at gmx.net  Sun Nov  5 04:18:07 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 05 Nov 2006 10:18:07 +0100
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
	<pan.2006.11.04.13.50.50.713078@gmx.net>
	<32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
	<mailman.1767.1162650166.11739.python-list@python.org>
	<1162690242.646530.23220@h54g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.05.09.18.05.947493@gmx.net>

In <1162690242.646530.23220 at h54g2000cwb.googlegroups.com>,
soring at gmail.com wrote:

> CORBA may work fine in an intranet environment, where you can control
> the server and the client, but it clearly failed to be a popular choice
> on the internet: have you seen any company offering webservices with a
> CORBA interface??

The OP wanted something for in-house communication between programs.  You
are right that CORBA is not a popular choice for offering "webservices"
for the masses but there used to be companies that offered CORBA
interfaces in the "business to business" arena when the word "webservice"
was yet to be invented.

A huge part of the SOAP popularity comes from marketing and shoving down
the buzzwords "webservices" and "XML" down everyone's throat and has
nothing to do with technical advantages or disadvantages.  Well, IMHO at
least.

Ciao,
	Marc 'BlackJack' Rintsch


From powernews at libero.it  Mon Nov 27 07:18:11 2006
From: powernews at libero.it (halex2000)
Date: Mon, 27 Nov 2006 12:18:11 GMT
Subject: working with files and directories
Message-ID: <7IAah.58105$uv5.416763@twister1.libero.it>

Hi all, I'm new with Python, and I thought to use it to automatically rename 
some files in a directory, but I don't know where should I search the 
functions: to get all the files of a directory, to rename the files and so 
on.
Thank you. 




From fredrik at pythonware.com  Mon Nov 27 13:40:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Nov 2006 19:40:36 +0100
Subject: can't get cgi values
In-Reply-To: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
Message-ID: <ekfbf5$156$1@sea.gmane.org>

ronrsr wrote:

> I'm having trouble extracting cgi parameters in my code - this is a web
> application, so I only know the line that's causing the problem.

seen this:

     http://docs.python.org/lib/module-cgitb.html

?

>      temp = str(form("citation").value)

did you perhaps mean form["citation"] ?

</F>



From duncan.booth at invalid.invalid  Sat Nov 25 10:13:03 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 25 Nov 2006 15:13:03 GMT
Subject: problem with global variable in a module
References: <1164463795.849460.124060@j72g2000cwa.googlegroups.com>
Message-ID: <Xns98869ACDC8E44duncanbooth@127.0.0.1>

"hollowspook" <hollowspook at gmail.com> wrote:

> from test import *
> b=1
> aa()
> 
> The error message is :
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "test.py", line 3, in aa
>     b=b+1
> NameError: global name 'b' is not defined
> 
> Why this happens? Please do me a favor. 

The global statement makes a name global to a module, it doesn't make it 
global to the entire program. The function aa is in module test, the 
statements you entered in the shell are in a different module called 
__main__.

The particular form of import you used may also be confusing you: just 
because you imported '*' doesn't change the function: 'aa' was defined in 
the module 'test' and that is where it still looks for its global 
variables, all the import did was define a new name 'aa' in the __main__ 
module which refers to the same function object as 'aa' in 'test'.



From laurent.pointal at limsi.fr  Thu Nov 30 08:34:24 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 30 Nov 2006 14:34:24 +0100
Subject: PythonTidy
In-Reply-To: <ekmltj$36d$1@cernne03.cern.ch>
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
Message-ID: <ekmmu4$8ii$1@upsn250.cri.u-psud.fr>

Roberto Bonvallet a ?crit :
> Chuck Rhode wrote:
>> I couldn't find a routine to clean up, regularize, and reformat Python
>> code, so I wrote one:
>>
>>  http://www.lacusveris.com/PythonTidy/PythonTidy.python
>>
>> Now, I'm looking for beta-testers.  Compensation is a bit on the low
>> side.  In fact it's limited to the satisfaction of helping out.
> 
...
> # vim: set fileencoding=utf-8 :
...
> # -*- coding: utf-8 -*-
...
> About changing the shebang line:  I'll take it as a bug.
> About changing the encoding declaration from vim-style to emacs-style:
> I'll take it as an insult :)

This is not "emacs-style", this is Python normalized source encoding
directive for correct interpretation of u"..." strings by Python
interpreter.

See http://www.python.org/dev/peps/pep-0263/


A+

Laurent.


From no-spam at no-spam-no-spam.invalid  Fri Nov 10 02:40:15 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 10 Nov 2006 08:40:15 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <ej03j3$5ge$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
	<mailman.1858.1162935489.11739.python-list@python.org>
	<eit29m$rmk$1@news.albasani.net>
	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>
	<ej03j3$5ge$1@news.albasani.net>
Message-ID: <ej1a52$qdp$1@news.albasani.net>

robert wrote:

> --------------
> 0040101F   mov         eax,3B9ACA00h
> 13:     for (i = 0; i < count; ++i) {
> 14:         __asm lock inc x;
> 00401024   lock inc    dword ptr [_x (00408a00)]
> 15:         sum += x;
> 0040102B   mov         edx,dword ptr [_x (00408a00)]
> 00401031   add         esi,edx
> 00401033   dec         eax
> 00401034   jne         main+24h (00401024)
> 16:     }
> ---------------
> 
> results on a UP PIII :
> 
> INC version:
> clocks: 7520
> secs:   7
> 
> LOCK INC version:
> clocks: 36632
> secs:   36
> 
> 
> Its probably not much...

The Intels I checked, have all about this factor of ~5 in that simple example.

AMDs were typically faster. less than ~3. 


-robert

PS: 
the asm for x86 linux/gcc:
-------------------

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

volatile int x=0;
clock_t c0,c1;
time_t t0,t1;

int main (int argc, char **argv) {
  int sum = 0, i, count = 100000000;
  t0=time(&t0);
  c0=clock();
  for (i = 0; i < count; ++i) {
      asm ("incl %0;" : "=m"(x)  );
      sum += x;
  }
  c1=clock();
  t1=time(&t1);
//  printf("%d\n", sum);
  printf("clocks: %d\n", c1-c0);
  printf("secs:   %d\n", t1-t0);
  return sum;
}


From mhellwig at xs4all.nl  Tue Nov 28 20:24:21 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Wed, 29 Nov 2006 02:24:21 +0100
Subject: why would anyone use python when java is there?
In-Reply-To: <ekimkj$7k8$1@panix3.panix.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<ekimkj$7k8$1@panix3.panix.com>
Message-ID: <456ce124$0$330$e4fe514c@news.xs4all.nl>

Aahz wrote:
> In article <1164762232.220759.57160 at h54g2000cwb.googlegroups.com>,
> gavino <bootiack at yahoo.com> wrote:
>> wtf
> 
> Because programming in Python makes me feel happy and contented, while
> programming in Java just makes me want to scream in agony.

Or in my case, Python made me code, Java made me brew java.
ymmv

-- 
mph


From i80and at gmail.com  Thu Nov  9 18:23:46 2006
From: i80and at gmail.com (i80and)
Date: 9 Nov 2006 15:23:46 -0800
Subject: Having problems with urlparser concatenation
Message-ID: <1163114626.595813.286260@b28g2000cwb.googlegroups.com>

I'm working on a basic web spider, and I'm having problems with the
urlparser.
This is the effected function:
------------------------------
    def FindLinks(Website):
        WebsiteLen = len(Website)+1
        CurrentLink = ''
        i = 0
        SpliceStart = 0
        SpliceEnd = 0

        LinksString = ""
        LinkQueue = open('C:/LinkQueue.txt', 'a')

        while (i < WebsiteLen) and (i != -1):

            #Debugging info
            #print '-----'
            #print 'Length = ' + str(WebsiteLen)
            #print 'SpliceStart = ' + str(SpliceStart)
            #print 'SpliceEnd = ' + str(SpliceEnd)
            #print 'i = ' + str(i)

            SpliceStart = Website.find('<a href="', (i+1))
            SpliceEnd = (Website.find('">', SpliceStart))

            ParsedURL =
urlparse((Website[SpliceStart+9:(SpliceEnd+1)]))
            robotparser.set_url(ParsedURL.hostname + '/' +
'robots.txt')
            robotparser.read()
            if (robotparser.can_fetch("*",
(Website[SpliceStart+9:(SpliceEnd+1)])) == False):
                i = i - 1
            else:
                LinksString = LinksString + "\n" +
(Website[SpliceStart+9:(SpliceEnd+1)])
                LinksString = LinksString[:(len(LinksString) - 1)]
                #print 'found ' + LinksString
                i = SpliceEnd

        LinkQueue.write(LinksString)
        LinkQueue.close()
------------------------------
Sorry if it's uncommented.  When I run my program, I get this error:
-----
Traceback (most recent call last):
  File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
line 120, in <module>
    FindLinks(Website)
  File "C:/Documents and Settings/Andrew/Desktop/ScoutCode-0.09.py",
line 84, in FindLinks
    robotparser.read()
  File "C:\Program Files\Python25\lib\robotparser.py", line 61, in read
    f = opener.open(self.url)
  File "C:\Program Files\Python25\lib\urllib.py", line 190, in open
    return getattr(self, name)(url)
  File "C:\Program Files\Python25\lib\urllib.py", line 451, in
open_file
    return self.open_local_file(url)
  File "C:\Program Files\Python25\lib\urllib.py", line 465, in
open_local_file
    raise IOError(e.errno, e.strerror, e.filename)
IOError: [Errno 2] The system cannot find the path specified:
'en.wikipedia.org\\robots.txt'

Note the last line 'en.wikipedia.org\\robots.txt'.  I want
'en.wikipedia.org/robots.txt'!  What am I doing wrong?

If this has been answered before, please just give me a link to the
proper thread.  If you need more contextual code, I can post more.



From sturlamolden at yahoo.no  Mon Nov 27 19:12:17 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 27 Nov 2006 16:12:17 -0800
Subject: About alternatives to Matlab
In-Reply-To: <ekevh6$2d5$1@fred.mathworks.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
	<1164504562.834005.197830@l39g2000cwd.googlegroups.com>
	<ekevh6$2d5$1@fred.mathworks.com>
Message-ID: <1164672737.701550.21570@l12g2000cwl.googlegroups.com>


Rob Purser wrote:

> Anyway, I just wanted to call your attention to Data Acquisition Toolbox:
> http://www.mathworks.com/products/daq/

Absolutely. If the hardware is supported by this toolbox, there is no
need to reinvent the wheel. The license is expensive, but development
time can be far more expensive. Matlab is an excellent tool for
numerical work.

However, Matlab is only single-threaded and does not optimize its
pass-by-value semantics with proper 'escape analysis'. (Yes, Matlab
does lazy copy-on-write to optimize function calls, but functions have
return values as well.)  I have (temporarily?) stopped using Matlab
because I constantly got annoyed by the limitations of the language. I
still use Matlab as an advanced desktop calculator though. Somehow I
find it easier to type in an expression in Matlab than NumPy, probably
because I am more accustomed to the syntax.



From jorge.vargas at gmail.com  Mon Nov  6 04:54:26 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 6 Nov 2006 09:54:26 +0000
Subject: Learning Python
In-Reply-To: <1162805615.944184.138050@h48g2000cwc.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
	<1162805615.944184.138050@h48g2000cwc.googlegroups.com>
Message-ID: <32822fe60611060154p490bd7c1lf376e24bd5300e0f@mail.gmail.com>

On 6 Nov 2006 01:33:36 -0800, ArdPy <ardsrk at gmail.com> wrote:
>
> kaushal wrote:
> > Hi
> >
> > How do i start Learning Python,is there any reference material which I
> > can refer since I dont have
> > any programming experience
> >
> > Thanks and Regards
> >
> > Kaushal
>
> Hi kaushal,
>
> Look into http://diveintopython.org. Dive into python is a really
> readable ebook...enjoy
>
Even though that's a great book I don't recomend it for non
programmers I think this http://docs.python.org/tut/ is a better way
to start

also I'll suggest you start learning other programming languaje before
python or else this will be the only one you will code :)

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


From john106henry at hotmail.com  Tue Nov 21 18:17:05 2006
From: john106henry at hotmail.com (John Henry)
Date: 21 Nov 2006 15:17:05 -0800
Subject: Trying to understand Python objects
In-Reply-To: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <1164151025.237616.134560@j44g2000cwa.googlegroups.com>

classes are not functions.  They are a "thing".

A simple example:

class pet(object):

	def __init__(self):
		self.myLegs=self._SetNumberOfLegs()

	def _SetNumberOfLegs(self):
		return 0

	def HowManyLegsDoYouHave(self):
		print self.myLegs

class cat(pet):

	def _SetNumberOfLegs(self):
		return 4

class rabbit(pet):

	def _SetNumberOfLegs(self):
		return 2

class fish(pet):
	pass

myPets=[cat(), fish(), rabbit()]

for pet in myPets:
	pet.HowManyLegsDoYouHave()


In the above example, both cat and rabbit has legs and fish?  Not
normally.  :=)

walterbyrd wrote:
> Reading "Think Like a Computer Scientist" I am not sure I understand
> the way it describes the way objects work with Python.
>
> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?
>
> 2) Are classes typically created like this:
>
> class Point:
>   pass
>
> Then attributes are added at some other time?
>
> 3) What is with the __underscores__ ??
>
> 4) Are parameters passed to an class definition?
>
> class Whatever(params):
>    pass
>
> I sort-of understand the way objects work with PHP. With PHP, the
> classes are defined in one place - sort of like a function. To me, that
> makes more sense.



From ejensen at visi.com  Tue Nov 14 19:56:08 2006
From: ejensen at visi.com (Ed Jensen)
Date: Wed, 15 Nov 2006 00:56:08 -0000
Subject: jython's future
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>
	<4rrjenFspqicU2@mid.uni-berlin.de> <4558ACAC.1030001@web.de>
	<1163440390.3434.45.camel@dot.uniqsys.com>
	<ejac9n$21u$1@sea.gmane.org>
	<mailman.80.1163442992.32031.python-list@python.org>
Message-ID: <12lkpd83jpjol3f@corp.supernews.com>

??ukasz Langa <lukasz.langa at gmail.com> wrote:
> Java was at 1.2 (and compiling Hello World took over 5 minutes)

Bullshit.  Complete and utter bullshit.


From e0427417 at student.tuwien.ac.at  Mon Nov 20 10:37:45 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 16:37:45 +0100
Subject: a few extensions for the itertools
In-Reply-To: <pan.2006.11.20.11.41.50.45063@REMOVE.THIS.cybersource.com.au>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.20.11.41.50.45063@REMOVE.THIS.cybersource.com.au>
Message-ID: <4561cb6a$0$11610$3b214f66@tunews.univie.ac.at>

Steven D'Aprano wrote:
> On Mon, 20 Nov 2006 09:54:41 +0100, Mathias Panzenboeck wrote:
> 
>> Steven D'Aprano wrote:
>>> On Sun, 19 Nov 2006 21:35:24 +0100, Mathias Panzenboeck wrote:
>>>
>>>> I wrote a few functions which IMHO are missing in python(s itertools).
>>>>
>>>> You can download them here:
>>>> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>>>>
>>>> A short description to all the functions:
>>>>
>>>> icmp(iterable1, iterable2) -> integer
>>>> 	Return negative if iterable1 < iterable2,
>>>> 	zero if iterable1 == iterable1,
>>>> 	positive if iterable1 > iterable1.
>>>
>>> What does it mean for an iterable to be less than another iterable? That
>>> it has fewer items? How do these two iterables compare?
>>>
>>> iter([1, 2, None, "foo", 3+2j])
>>>
>>> def ones():
>>>     while 1:
>>>         yield 1
>>>
>>> Which is smaller?
>>>
>>>
>> it's like cmp on lists, but on iterables.
>>
>> [1,2,3] < [1,2,4]
>> [1,2,3] < [1,2,3,0]
> 
> 
> But that meaningless, as far as I can see. Lists and iterators aren't the
> same thing. A list is a collection; an iterator is not, but it can be
> accumulated into a collection.
> 
> If equality is meaningful for an object, you should be able to test for
> equality without changing the object. But that isn't true for iterators.
> 
> Worse, because comparing an iterator consumes items, you can easily get
> crazy results like the following:
> 
> 
>>>> L = [1, 2, 3, 4, 5]
>>>> def it():
> ...     yield 5; yield 0; yield 0; yield 0; yield 0
> ... 
>>>> it = it()
> 
> Now, we can compare the first item of L with the first item of it:
> 
>>>> L[0] < it.next()  # if True, L < it
> True
> 
> So L must be less than it, right? Let's print both objects out in full to
> check:
> 
>>>> print L
> [1, 2, 3, 4, 5]
>>>> print list(it) # if L < it, it must be > L
> [0, 0, 0, 0]
> 
> Oops.
> 
> I think the GENERAL concept of comparison between iterators is
> meaningless. A lazy comparison between the items of an iterator and some
> other iterable may be a useful thing to do, but as a general concept,
> saying that an iterator compares bigger or smaller or equal to something
> else doesn't make sense, since the mere fact that you make that comparison
> will change the iterator.
> 
> 

I see. Yes, in general you are right, but I implemented it to use it for that (and similar things):

icmp(open("foo.txt"),open("bar.txt"))

Thats cool, I think. :)


	panzi


From siona at chiark.greenend.org.uk  Mon Nov  6 10:53:19 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 06 Nov 2006 15:53:19 +0000 (GMT)
Subject: Really strange behavior
References: <pan.2006.11.04.12.02.26.532144@yahoo.it>
Message-ID: <Naj*BA9ur@news.chiark.greenend.org.uk>

IloChab  <IloChab at yahoo.it> wrote:
[this works]
>def main():
>    app = QtGui.QApplication(sys.argv)
>    qt4reactor.install(app)
>    MainWindow = QtGui.QMainWindow()
>    win = Window(MainWindow)
>    MainWindow.show()
>    from twisted.internet import reactor
>    reactor.run()
[this doesn't]
>def creApp():
>    app = QtGui.QApplication(sys.argv)
>    qt4reactor.install(app)
>    retrun app
>def creWin():
>    MainWindow = QtGui.QMainWindow()
>    win = Window(MainWindow)
>    MainWindow.show()
>def main():
>    app = creApp()
>    creWin()
>    from twisted.internet import reactor
>    reactor.run()

I don't know if this is the problem or not (knowing neither Qt nor
Twisted), but creWin() creates a window (or two) then throws it
(them?) away on returning to main() (I assume you've chopped
off the bit where main() is actually called). So it's not too
surprising your window doesn't show: by the time you get to
running anything, you don't have a window object to show. (Unless
a Qt application object is a discoverable global and windows
inject a reference to themselves into it.)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From jameshcunningham at gmail.com  Fri Nov 10 20:08:07 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Fri, 10 Nov 2006 20:08:07 -0500
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<45536639$0$23587$426a34cc@news.free.fr>
	<1163099166.793869.271900@h48g2000cwc.googlegroups.com>
Message-ID: <2006111020080716807-jameshcunningham@gmailcom>

On 2006-11-09 14:06:06 -0500, "Dan Lenski" <dlenski at gmail.com> said:

> [snip]
> 
> My understanding is that wx wraps Windows, OSX, Qt, and GTK+... I guess
> some of the wrappers fit the native apps better than others?
> 
> Dan

WxWidgets does wrap Windows, OS X (Carbon), and GTK; it does not wrap 
Qt. On this page is a list of WxWidgets ports:

http://wiki.wxwidgets.org/docbrowse.cgi/wxwin_wxplatforminfo.html

According to the WxWidgets wiki, there's nothing stopping a person from 
writing a Qt port.

http://www.wxwidgets.org/wiki/index.php/WxWidgets_Compared_To_Other_Toolkits

Best,
James



From pavlovevidence at gmail.com  Thu Nov 30 22:05:12 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 30 Nov 2006 19:05:12 -0800
Subject: Is there a reason not to do this?
References: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>
	<4t96ujF134nv7U1@mid.uni-berlin.de>
	<rNOSPAMon-D8A387.17003830112006@news.gha.chartermi.net>
Message-ID: <1164942311.945476.147100@f1g2000cwa.googlegroups.com>

Ron Garret wrote:
> In article <4t96ujF134nv7U1 at mid.uni-berlin.de>,
>  "Diez B. Roggisch" <deets at nospam.web.de> wrote:
>
> > Ron Garret schrieb:
> > > One of the things I find annoying about Python is that when you make a
> > > change to a method definition that change is not reflected in existing
> > > instances of a class (because you're really defining a new class when
> > > you reload a class definition, not actually redefining it).  So I came
> > > up with this programming style:
> > >
> > > def defmethod(cls):
> > >   return lambda (func): type.__setattr__(cls, func.func_name, func)
> > >
> > > class c1(object): pass
> > >
> > > @defmethod(c1)
> > > def m1(self, x): ...
> > >
> > >
> > > Now if you redefine m1, existing instances of c1 will see the change.
> > >
> > > My question is: is there a reason not to do this?  Does it screw
> > > something up behind the scenes?  Is it unpythonic?  Why isn't this
> > > standard operating procedure?

1. Do you mean, is there an "it'll crash the interpreter" reason? No.
2. Not for most ordinary cases.  There are a few gotchas (for example,
use of __private variables), but they're minor.
3. Yes.
4. Because it's unPythonic.

But don't worry too much if you do something unPythonic occasionally.
Python says there's should be one--and preferably only one--obvious way
to do it.  So if there's no obvious way to do it, you probably have to
do something unPythonic.  (Or consult someone with more experience. :)


[snip]
> I have two motivations.
>
> First, I'm dealing with some classes whose instances take a long time to
> construct, which makes for a long debug cycle if I have to reconstruct
> them after every code change.
>
> Second, the design just naturally seems to break down that way.  I have
> a library that adds functionality (persistence) to a set of existing
> classes.  The persistence code stores the objects in a relational DB, so
> it's pretty hairy code, and it has nothing to do with the functionality
> that the classes actually provide.  The original classes are useful even
> with the persistence code, and I'm trying to keep things lightweight.

Seems like a reasonable use case to me.

> If there's a better way to accomplish all this I'm all ears.

A straightforward, Pythonic way to do it would be to create an
intermediate representation that understands both the existing class
interfaces and the RDB stuff, but that could lead to synchronizing
problems and a big hit in performance.  And it's probably a lot of work
compared to tacking on methods.  OTOH, it could help with hairiness you
mention.  (I recently did something similar in one of my projects,
though the intermediary was transient.)

You might be able to create a set of augmented subclasses to use
instead.  The main problem with this is that base classes often don't
know about the augmented versions.  You'd have to override code that
requires an ordinary object with code that allows an augmented object.
This is sometimes very inconvenient (like when the code requiring an
ordinary object is one line smack in the middle of a 100-line
function).

It actually sounds like Aspect Oriented Programming might be helpful
here (if you care to learn another wholly different programming
paradigm, that is).  You have a concern (persistence) that's pretty
much off in another dimension from the purpose of the classes.


Or maybe the best way is just to teach an old class new tricks.


Carl Banks



From paul at boddie.org.uk  Thu Nov  9 06:43:58 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Nov 2006 03:43:58 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<mailman.1858.1162935489.11739.python-list@python.org>
	<eit29m$rmk$1@news.albasani.net>
Message-ID: <1163072637.924217.90610@h54g2000cwb.googlegroups.com>

robert wrote:
> Shane Hathaway wrote:
> > of multiple cores.  I think Python only needs a nice way to share a
> > relatively small set of objects using shared memory.  POSH goes in that
> > direction, but I don't think it's simple enough yet.
> >
> > http://poshmodule.sourceforge.net/
>
> interesting, a solution possibly a little faster than pickling - but maybe only in selected
> situations. Made already experiments with pickling through shared memory.

What did you discover in your experiments? I'd certainly suspect that
pickling is going to add an unacceptable degree of overhead in the kind
of application you're attempting to write (using a shared data
structure with random access properties), and I'll admit that I haven't
really had to deal with that kind of situation when using my own
pickle-based parallelisation solutions (which involve communicating
processes).

> With "x = posh.share(x)" an object tree will be (deep-)copied to shared mem ( as far as
> objects fullfil some conditions http://poshmodule.sourceforge.net/posh/html/node6.html: is
> this true for numpy arrays?)

My impression is that POSH isn't maintained any more and that work was
needed to make it portable, as you have observed. Some discussions did
occur on one of the Python development mailing lists about the
possibility of using shared memory together with serialisation
representations faster than pickles (which also don't need to be
managed as live objects by Python), and I think that this could be an
acceptable alternative.

> Every object to be inserted in the hot tunnel object tree has to be copied that same style.
> Thus ~pickling, but somewhat easier to use.

If my understanding of "hot tunnel object tree" is correct, you're
really wanting fast access involving mutual exclusion to some shared
data structure. At this point it becomes worth considering some kind of
distributed object technology (or even a database technology) where you
have to initialise the data structure and then communicate with an
object (or database) to perform operations on it, all for reasons I'll
explain shortly.

In your ideal situation, you say that you'd have the data structure in
the same address space as a number of threads, and each thread would be
able to perform some algorithm on the data structure, but the pattern
of accessing the structure isn't an insignificant concern even where
you can assume that the overheads are generally low: reading and
writing things might be fast in the same address space, but if the
nature of access involves lots of locking, you'll incur quite a penalty
anyway. In other words, if each read or write to the structure involves
acquiring a lock for that operation in isolation, this could
significantly diminish performance, whereas if you can guarantee that
the granularity of locking is more coarse than having to occur upon
each read or write access - that there exist some high-level operations
that require consistency within the data structure - then reasonable
performance might be maintained.

However, if the pattern of concurrent access is restricted to coarse
operations, where some entity has exclusive access to a potentially
large dataset, and where the overhead of the communication of inputs
and outputs to and from that entity is low in comparison to the cost of
performing such coarse operations, and where such operations are
themselves performed infrequently, then such a pattern coincides with
classic database or distributed object scenario. In other words, you
implement the operations acting on the data structure in a distributed
object (or as a database query or operation) and then invoke such
operations from separate processes.

I hope this makes some sense. Generally, demands for high concurrent
performance using threads often ignore other important properties such
as reliability and scalability. Certainly, threads have an important
place - classically, this involved maintaining responsiveness in
graphical user interfaces - but even then, the background threads were
often detached and not competing for the same resources as the
foreground threads servicing the event loop. The only kinds of
situation I can think of right now which might benefit from uninhibited
random access to shared data structures might be things like
simulations or large-scale multi-user games, where an appropriate data
architecture cannot be decided in advance, but even then there are
approaches which attempt to mitigate the seemingly unpredictable nature
of access to shared data.

Paul



From no-spam at no-spam-no-spam.invalid  Fri Nov 17 07:01:34 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 17 Nov 2006 13:01:34 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <LL-dnSzcEqMtb8HYRVnzvA@telenor.com>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
	<eiva35$v3m$1@news.albasani.net>
	<7vCdnSqE260grc7YRVnzvQ@telenor.com>
	<eivuh3$tk2$1@news.albasani.net>
	<Y7idna2l5tQXIcTYRVnzvA@telenor.com>
	<ejhuom$gi4$1@news.albasani.net>
	<LL-dnSzcEqMtb8HYRVnzvA@telenor.com>
Message-ID: <ejk8b0$6c6$1@news.albasani.net>

Svein Seldal wrote:

> A real beauty about the PyGILState_Ensure() is the fact that if it's 
> called from a thread that is (yet) unknown to python, it will actually 
> create the thread state object for you (with PyThreadState_New) and 
> acquire the lock. Hence, I dont have to worry about the process of 
> swapping thread states with PyEval_xxxThread() functions. I ONLY need to 
> use PyGILState_Ensure() prior to any py-ops.

Interesting - the PyGILState_Ensure was new to py2.3. I didn't notice so far, that it will even auto-create a fresh tread state (from default InterpreterState only). From the docs its not that clear. 

The confusion in usage is that one has to do 

Py_Initialize()
PyEval_InitThreads()
ts=PyEval_SaveThread()

in order to start clean for further pure "meta-high-level" PyGILState_Ensure/Release.

They obviously meant PyGILState_Ensure to make live easier, but the discussion shows, it adds additional worries probably forcing each user into investigating the Python C-code :-)

There should probably a extra init function for this meta-high-level usage like ..

PyGILState_PyInitThreads()   //  which would not pre-acquire the lock! - as anyone expects to enter then with PyGILState_Ensure

. and these 3 Functions grouped together in the docs for an easy-to-use meta-high-level thread state API.

The current thread state API doc, as you read it from top to bottom now, is in fact totally confusing for anyone who didn't develop Python himself :-)


Robert


From fredrik at pythonware.com  Wed Nov 22 04:06:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 10:06:40 +0100
Subject: Parsing/Splitting Line
In-Reply-To: <kc-dnXWhCOXEA_7YnZ2dnUVZ_hmdnZ2d@comcast.com>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
	<kc-dnXWhCOXEA_7YnZ2dnUVZ_hmdnZ2d@comcast.com>
Message-ID: <ek13uv$8ie$2@sea.gmane.org>

Noah Rawlins wrote:


> I'm a nut for regular expressions and obfuscation...
> 
> import re
> def splitline(line, size=4):
>      return re.findall(r'.{%d}' % size, line)
> 
>  >>> splitline("helloiamsuperman")
> ['hell', 'oiam', 'supe', 'rman']

there are laws against such use of regular expressions in certain 
jurisdictions.

</F>



From bignose+hates-spam at benfinney.id.au  Sun Nov 12 04:19:37 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 12 Nov 2006 20:19:37 +1100
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
Message-ID: <87irhlhviu.fsf@benfinney.id.au>

"Dustan" <DustanGroups at gmail.com> writes:

> Steven D'Aprano wrote:
> > Repeat after me:
> >
> > "Not everything has to be a one-liner."
>
> Not everything has to be a one-liner. But readability helps.

Indeed. Complex one-liners are rarely as readable as a well-named
function call, implemented with several explicit readable lines in
one place, and then re-used as many times as necessary.

-- 
 \      "Anyone who believes exponential growth can go on forever in a |
  `\     finite world is either a madman or an economist."  -- Kenneth |
_o__)                                                         Boulding |
Ben Finney



From deets at nospam.web.de  Thu Nov  9 18:31:48 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 10 Nov 2006 00:31:48 +0100
Subject: how to create a multicolor "font-string" in pygame??
In-Reply-To: <4rhptpFrneqhU1@mid.uni-berlin.de>
References: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>
	<4rhptpFrneqhU1@mid.uni-berlin.de>
Message-ID: <4rhs32Frkr4qU1@mid.uni-berlin.de>

Diez B. Roggisch schrieb:
> Iacopo.Marmo at gmail.com schrieb:
>> Hi! I need to manipulate multicolor strings, i.e. strings with a color
>> associated with each letter.
>> Any suggestions?
> 
> There is no support for multi-color strings as such in pygame. If you 
> use a fixed-width font, things are easy. Just create the strings one 
> after another using spaces as prefix. E.g.
> 
> back = (0,0,0)
> font = pygame.font.Font(font_fn, size)
> images = []
> for i, c in enumerate("colored string"):
>     s = " " * i + c
>     color = color_for_index(i)
>     s_image = font.render(s, True, color, back)
>     images.append(s_image)

Don't drink and code... *sigh*

Of course you can just create an equally dimensioned image for each 
character and each color (cached or not, however you like it), and just 
blit these one after another, offsetting them with the character width.

Diez


From mgiann at beta-cae.gr  Mon Nov 27 04:33:48 2006
From: mgiann at beta-cae.gr (Michalis Giannakidis)
Date: Mon, 27 Nov 2006 11:33:48 +0200
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <ekcgov$lu1$1@sea.gmane.org>
References: <200611261804.54669.mgiann@beta-cae.gr>
	<ekcgov$lu1$1@sea.gmane.org>
Message-ID: <200611271133.48359.mgiann@beta-cae.gr>


> in general, methods on C objects are implemented in terms of operations
> on the internal data structures, not in terms of a subset of the methods
> already provided by the object.

But what is the reason that the assignment 
l[2] = 6 
call my function, but
l.append(3) 
doesn't ?

Also, why can't I override these functions (for example in order to get access 
to the list.sort() internals)? Or can I?


#!/usr/bin/env python
class L(list):
        def __getitem__(self, i):
                print 'G', i
                return list.__getitem__(self, i)
        def __setitem__(self, i, y):
                print 'S:', i, y
                return list.__setitem__(self, i, y)
        def __setslice__(self, i, j, y):
                print 'SL:', i, j, y
                return list.__setslice__(self, i, j, y)
        def __iter__(self, x):
                print 'iter:', x
                return list.__iter__(self, x)

l = L()
l.append(3) # this does not call my __setitem__
l.append(2)
l.append(1)
l[2] = 6 # this calls my __setitem__
l.sort(key=lambda x: x )
print l

-- 
Michalis Giannakidis


From gregpinero at gmail.com  Fri Nov 17 00:17:37 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Fri, 17 Nov 2006 00:17:37 -0500
Subject: Heap Memory
In-Reply-To: <455D3354.7000002@branda.to>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
	<ejia35$cfk$1@sea.gmane.org>
	<312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
	<455D3354.7000002@branda.to>
Message-ID: <312cfe2b0611162117o49eaf648kcf5cf9ac2a26b2f3@mail.gmail.com>

On 11/16/06, Thinker <thinker at branda.to> wrote:
> What is your OS? Maybe you should show out the memory usage of your python
> process. In FreeBSD, you should set evironment variable
> 'MALLOC_OPTIONS=P' to
> print out usage of malloc()?Maybe you can find a way, in your system,
> to print out usage of the
> heap.
>
It is Windows XP.  Is there a simliar method for it?  I am curious.

-Greg


From cameron.walsh at gmail.com  Tue Nov 28 00:56:29 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Tue, 28 Nov 2006 13:56:29 +0800
Subject: splitting a long string into a list
In-Reply-To: <1164692359.274433.239710@n67g2000cwd.googlegroups.com>
References: <1164692359.274433.239710@n67g2000cwd.googlegroups.com>
Message-ID: <ekgj1i$7qd$1@enyo.uwa.edu.au>

ronrsr wrote:
> I have a single long string - I'd like to split it into a list of
> unique keywords. Sadly, the database wasn't designed to do this, so I
> must do this in Python - I'm having some trouble using the .split()
> function, it doesn't seem to do what I want it to - any ideas?
> 
> thanks very much for your help.
> 
> r-sr-
> 
> 
> longstring = '<SNIP rather long string>'

What do you want it to do?  Split on each semicolon?

a = longstring.split(";")
for element in a:
  print element

Agricultural subsidies
 Foreign aidAgriculture
Sustainable Agriculture - Support
 Organic Agriculture
 Pesticides, US,Childhood Development, Birth Defects
 Toxic ChemicalsAntibiotics,AnimalsAgricultural Subsidies, Global
TradeAgriculturalSubsidiesBiodiversityCitizen
ActivismCommunityGardensCooperativesDietingAgriculture,
CottonAgriculture, GlobalTradePesticides, MonsantoAgriculture,
SeedCoffee, HungerPollution,Water, FeedlotsFood PricesAgriculture,
WorkersAnimal Feed,
Corn,PesticidesAquacultureChemicalWarfareCompostDebtConsumerismFearPesticides,
US, Childhood Development,Birth DefectsCorporate Reform,  Personhood
(Dem. Book)Corporate Reform, Personhood, Farming (Dem. Book)Crime Rates,
Legislation,EducationDebt, Credit CardsDemocracyPopulation,
WorldIncomeDemocracy,Corporate Personhood, Porter Township (Dem.
Book)DisasterReliefDwellings, SlumsEconomics, MexicoEconomy,
LocalEducation,ProtestsEndangered Habitat, RainforestEndangered
SpeciesEndangeredSpecies, Extinctionantibiotics, livestockAgricultural
subsidies
Foreign aid
Agriculture
 Sustainable Agriculture - Support
 OrganicAgriculture
 Pesticides, US, Childhood Development, Birth Defects
Toxic Chemicals
<etc.>

I think the problem arises because your string has the following problems:

1.)  Inconsistent spaces between words (some are non-existent)
2.)  Inconsistent separators between elements (sometimes semi-colons,
sometimes commas, but commas appear to belong to elements, sometimes no
clear separator at all)

Basically, this problem is not solvable by computer with currently
available resources.  There is no way Python or anything else can know
which words are meant to be together and which are not, when there are
no separators between elements and no separators between words within
those elements.

You need to find a new way of generating the string, or do it by hand.

How did you get the string?

Cameron.


From silvan.spross at gmail.com  Fri Nov  3 03:02:12 2006
From: silvan.spross at gmail.com (spross)
Date: 3 Nov 2006 00:02:12 -0800
Subject: problems with matplotlib on mac os x
Message-ID: <1162540932.301425.53660@f16g2000cwb.googlegroups.com>

hi all

i have to use matplotlib on mac os x. on the official site of
matplotlib, i found a link to precompiled python packages for mac os x:

http://pythonmac.org/packages/py24-fat/index.html

so first, i installed python 2.4. that works great! if i type 'python'
in the terminal, it loads python 2.4.
after that, i loaded and installed the matplotlib package from this
site. if i type in python 'import matplotlib' no error appiers. so far,
so well...

so i went back to the tutorial page of matplotlib to crab a test... but
they use overall 'import pylab'. witch doesn't work in my python... so
i went back to the packages site again, loaded and installed numpy. now
hurray, python can do something with 'import pylab', but:

[code]
>>> import pylab
RuntimeError: module compiled against version 1000009 of C-API but this
version of numpy is 1000002

The import of the numpy version of the _transforms module,
_ns_transforms, failed.  This is is either because numpy was
unavailable when matplotlib was compiled, because a dependency of
_ns_transforms could not be satisfied, or because the build flag for
this module was turned off in setup.py.  If it appears that
_ns_transforms was not built, make sure you have a working copy of
numpy and then re-install matplotlib. Otherwise, the following
traceback gives more details:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/pylab.py",
line 1, in ?
    from matplotlib.pylab import *
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/pylab.py",
line 201, in ?
    from axes import Axes, PolarAxes
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/axes.py",
line 14, in ?
    from artist import Artist, setp
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/artist.py",
line 4, in ?
    from transforms import identity_transform
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/transforms.py",
line 223, in ?
    from _transforms import Value, Point, Interval, Bbox, Affine
  File
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/matplotlib/_transforms.py",
line 17, in ?
    from matplotlib._ns_transforms import *
ImportError: numpy.core.multiarray failed to import
[/code]

The error tells me, i have to install the packages in right order. so i
did it again:

1. numarray
2. numpy
3. matplotlib

But after that, the same error message appiers. i was never so near
that it will works :(
Can anybody help me?

Big thanks!
spross



From fuzzyman at gmail.com  Sat Nov 18 14:15:28 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 18 Nov 2006 11:15:28 -0800
Subject: What do I look for in a shared Python host?
In-Reply-To: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
Message-ID: <1163877328.071239.191260@f16g2000cwb.googlegroups.com>


walterbyrd wrote:
> For example:
>
> - If I want to use Django, I need either FastCGI or Apache
> 2.X/mod_python 3.x
>
> - if I want to use TurboGears, I need Python 2.4: not 2.3 and not 2.5
>
> - I have just learned that some hosters have T&Cs that forbid long
> running processes. I am not sure exactly what that means. Except I
> understand it can be a problem if using Cherrypy/TurboGears
>
> - I have read that mod_python before 3.x can be difficult
>
> What other "gotchas" would I look for?

The best host for Python (including Django and Turbogears), try
webfaction. They used to be known as Python-hosting.com and offer great
support for Python.

Fuzzyman
http://www.voidspace.org.uk/index2.shtml



From jimvtess at gmail.com  Sat Nov  4 12:54:19 2006
From: jimvtess at gmail.com (Jim)
Date: 4 Nov 2006 09:54:19 -0800
Subject: win32file.DeviceIoControl(FSCTL_GET_RETRIEVAL_POINTERS)
In-Reply-To: <454CCD35.6010201@v.loewis.de>
References: <1162660691.829676.85990@h48g2000cwc.googlegroups.com>
	<454CCD35.6010201@v.loewis.de>
Message-ID: <1162662859.305505.48240@i42g2000cwa.googlegroups.com>

Mea culpa: files with *no* clusters return the end-of-file error.



From orsenthil at gmail.com  Mon Nov 13 03:56:51 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 00:56:51 -0800
Subject: httplib.InvalidURL: nonnumeric port: For characters in the proxy
	password in URL
Message-ID: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>

Hi,
     The following piece of code works properly when my proxy password
contains characters[a-zA-Z0-9] etc. But when my proxy password
contained something like '|\/|' , the httplib incorrectly indentified
it as separator. How do I resolve this issue.

<code>
# Proxy Address
PROXY_IP = "1.1.9.8:80"

# Trying with linear way

proxy_user = 'user_name'
proxy_password='|\/|something'

# Setup the Proxy with urllib2

proxy_url = 'http://' + proxy_user + ':' + proxy_password + '@' +
PROXY_IP
proxy_support = urllib2.ProxyHandler({"http":proxy_url})
opener = urllib2.build_opener(proxy_support,urllib2.HTTPHandler)
urllib2.install_opener(opener)

</code>

I get the Error:

Traceback (most recent call last):
  File "C:\Python24\forge\ngwallp\ngwall.py", line 35, in ?
    data = urllib2.urlopen(site)
  File "C:\Python24\lib\urllib2.py", line 130, in urlopen
    return _opener.open(url, data)
  File "C:\Python24\lib\urllib2.py", line 358, in open
    response = self._open(req, data)
  File "C:\Python24\lib\urllib2.py", line 376, in _open
    '_open', req)
  File "C:\Python24\lib\urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "C:\Python24\lib\urllib2.py", line 1021, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "C:\Python24\lib\urllib2.py", line 980, in do_open
    h = http_class(host) # will parse host:port
  File "C:\Python24\lib\httplib.py", line 586, in __init__
    self._set_hostport(host, port)
  File "C:\Python24\lib\httplib.py", line 598, in _set_hostport
    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
httplib.InvalidURL: nonnumeric port: '|\'


Thanks,
Senthil



From ghidox at gmail.com  Tue Nov 14 10:49:58 2006
From: ghidox at gmail.com (Ghido)
Date: 14 Nov 2006 07:49:58 -0800
Subject: wxpython - wxtoolbar font size
Message-ID: <1163519398.369070.165890@i42g2000cwa.googlegroups.com>

Hi all i want to set wx.toolbar font size and i use this code:

self.tb1 = wx.ToolBar(self, -1, style=wx.TB_HORIZONTAL|
                                    wx.TB_TEXT)
self.tb1.SetFont(wx.Font(9, wx.DEFAULT, wx.NORMAL,0))
self.SetToolBar(self.tb1)

but i obtain nothing. Is possibile? where i wrong?
I use wxpython 2.6.3 on ubuntu edgy
thanks

Ghido



From fredrik at pythonware.com  Mon Nov 13 02:26:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 08:26:59 +0100
Subject: Python 3000 idea -- + on iterables -> itertools.chain
In-Reply-To: <1163385266.824914.265490@b28g2000cwb.googlegroups.com>
References: <slrnelfg32.6d3.jtr@ofb.net>	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
Message-ID: <ej96o1$mt2$1@sea.gmane.org>

George Sakkis wrote:

> The base object class would be one candidate, similarly to the way
> __nonzero__ is defined to use __len__, or __contains__ to use __iter__.
> 
> Alternatively, iter() could be a wrapper type (or perhaps mixin)
> instead of a function, something like:

so you're proposing to either make *all* objects respond to "+", or 
introduce limited *iterator* algebra.

not sure how that matches the OP's wish for "mostly backwards 
compatible" support for *iterable* algebra, really...

(iirc, GvR has shot down a few earlier "let's provide sugar for iter- 
tools" proposals.  no time to dig up the links right now, but it's in 
the python-dev archives, somewhere...)

</F>



From sjdevnull at yahoo.com  Mon Nov 27 19:46:47 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 27 Nov 2006 16:46:47 -0800
Subject: "fork and exit" needed?
In-Reply-To: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
Message-ID: <1164674807.922720.155080@j44g2000cwa.googlegroups.com>

Vincent Delporte wrote:
> Hi
>
> 	I'm a Python newbie, and would like to rewrite this Perl scrip
> to be run with the Asterisk PBX:
>
> http://www.voip-info.org/wiki/view/Asterisk+NetCID
>
> Anyone knows if those lines are necessary, why, and what their
> alternative is in Python?

> open STDOUT, '>/dev/null';

Either redefine stdout to an open file object for /dev/null or run the
script as "script.py >/dev/null"

> fork and exit;
something like:

if os.fork():
   sys.exit(0)

Tells the parent to exit after the fork while the child keeps running.
These are both steps in becoming a daemon (the comp.unix.programmer
FAQ, while skewed toward C, explains why some of these steps are
needed).



From timr at probo.com  Wed Nov  8 01:50:07 2006
From: timr at probo.com (Tim Roberts)
Date: Wed, 08 Nov 2006 06:50:07 GMT
Subject: Awesome Python Information
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
	<DSs3h.5716$lx6.4779@tornado.texas.rr.com>
	<mailman.1790.1162763395.11739.python-list@python.org>
	<9IKdnVDSOP6DX9PYnZ2dnUVZ_sqdnZ2d@comcast.com>
Message-ID: <l8v2l2t1n1pm2emkr8aa0o4qlml4edo9k0@4ax.com>

"Dave Setchell" <setchell.dave at gmail.com> wrote:
>
>So I'm using a new fangled newsreader...[pan] and thought i'd test it's
>posting and headers on this silly thread...sorry if I wasted anyones time!.

Well, it's not really correct to call pan a "new-fangled newsreader".  I
was evaluating it in 1999 as an alternative to Agent, and it was not new
even then.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From fredrik at pythonware.com  Wed Nov  1 08:00:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 14:00:44 +0100
Subject: authenticated https post
In-Reply-To: <1162385421.870142.8680@h48g2000cwc.googlegroups.com>
References: <1162385421.870142.8680@h48g2000cwc.googlegroups.com>
Message-ID: <eia5pr$uvh$1@sea.gmane.org>

assaf wrote:

> I'm trying to use Python to work with del.icio.us's API.
> Basically, I need to be able to do a simple https post, with
> username/password authentication.
> (For those interested, the del.icio.us API is here:
> http://del.icio.us/help/api/)
> 
> I can't for the life of me find a simple https example code that
> works... I'm working on Windows, btw, if that makes any difference.

tried  http://code.google.com/p/pydelicious/ ?

(it's linked from the "useful things that other people have made" 
section on del.icio.us' help page, just above the "developers" section 
where you found that api link).

</F>



From rtw at freenet.co.uk  Wed Nov  1 05:51:29 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 04:51:29 -0600
Subject: Where do nested functions live?
References: <Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>
	<mailman.1556.1162316571.11739.python-list@python.org>
Message-ID: <Xns986E6E3BBB3B2rtwfreenetREMOVEcouk@216.196.109.145>

Frederic Rentsch wrote in news:mailman.1556.1162316571.11739.python-
list at python.org in comp.lang.python:

> Rob Williscroft wrote:
>> Frederic Rentsch wrote in news:mailman.1536.1162292996.11739.python-
>>> Rob Williscroft wrote:
>>>> Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-

[snip]

>>>>       
>>> Here I'm lost. What's the advantage of this? It looks more convoluted.
>>>     
>>
>> I'll agree that having to explicitly define a namespace class first 
>> does add some convolution. 
>>
>> But if you refer to having to prefix you "outer" variables with
>> "scope." then this would be the same as claiming that the explict use
>> of self is convoluted, which is a valid opinion, so fair enough, but
>> I can't say that I agree. 
>>
>>   
> 
> I didn't mean to call into question. I didn't understand the advantage 
> of the added complexity of your second example over the first.
> 

Ok, I missed your point, as for the second example it was an attempt 
to show that further refactoring from a function with local functions
that are sharing some state via the scope object, to a class with
methods that share state via the instance, is a matter of editing
a few lines.  

This is useful when a function grows too large (for some value of 
"too large"). As an added bonus you get to use the same thechniques
with both styles of coding.
 
[snip]

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From ggrp1.20.martineau at dfgh.net  Tue Nov 14 16:59:22 2006
From: ggrp1.20.martineau at dfgh.net (Martin Miller)
Date: 14 Nov 2006 13:59:22 -0800
Subject: Character Encodings and display of strings
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
	<mailman.62.1163428860.32031.python-list@python.org>
	<1163429791.517778.46220@f16g2000cwb.googlegroups.com>
	<4rrjibFspqicU3@mid.uni-berlin.de>
	<1163440310.722375.156930@m7g2000cwm.googlegroups.com>
	<1163448261.866172.321670@e3g2000cwe.googlegroups.com>
Message-ID: <1163541562.683902.256410@b28g2000cwb.googlegroups.com>

It is possible derive your own string class from the built-in one and
override what 'repr' does (and make it do whatever you want). Here's an
example of what I mean:

##### Sample #####

# -*- coding: iso-8859-1 -*-

# Special string class to override the default
# representation method. Main purpose is to
# prefer using double quotes and avoid hex
# representation on chars with an ord > 128
class MsgStr(str):

    def __repr__(self):
        asciispace = ord(' ')
        if self.count("'") >= self.count('"'):
            quotechar = '"'
        else:
            quotechar = "'"

        rep = [quotechar]
        for ch in self:
            if ord(ch) < asciispace:
                rep += repr(str(ch)).strip("'")
            elif ch == quotechar:
                rep += "\\"
                rep += ch
            else:
                rep += ch
        rep += quotechar

        return "".join(rep)

if __name__ == "__main__":
    s = MsgStr("\tW?rttemberg\"")
    print s
    print repr(s)
    print str(s)
    print repr(str(s))



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 10 15:24:50 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 10 Nov 2006 21:24:50 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
Message-ID: <4rk5giFrerjfU1@mid.individual.net>

Marc 'BlackJack' Rintsch wrote:

> No it doesn't -- look again at the example given above.  It's
> legal syntax in Python but doesn't have the semantics implied by
> the example.

Sorry, I don't understand -- what is the difference between the
example as it is and the implied semantics of it?

Regards,


Bj?rn

-- 
BOFH excuse #239:

CPU needs bearings repacked



From fredrik at pythonware.com  Tue Nov 14 09:35:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 15:35:23 +0100
Subject: A question on Encoding and Decoding.
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>
Message-ID: <ejck7b$7hn$1@sea.gmane.org>

"kath" wrote:

> Also python IDLE is able to output the same character corretly when I
> say print and why not I?

probably because IDLE's interactive window is Unicode-aware, but your terminal
is not.

</F> 





From Maria.Reinhammar at accalon.com  Wed Nov 29 08:29:31 2006
From: Maria.Reinhammar at accalon.com (Maria R)
Date: 29 Nov 2006 05:29:31 -0800
Subject: Processing Solid Edge objects
In-Reply-To: <1164804107.162420.99730@j44g2000cwa.googlegroups.com>
References: <1164803264.351803.204720@h54g2000cwb.googlegroups.com>
	<1164804107.162420.99730@j44g2000cwa.googlegroups.com>
Message-ID: <1164806971.729422.87170@14g2000cws.googlegroups.com>


olive skrev:

> It would help if you could give an exemple of .par and .asm file.
>
> Is it human readable, XML ... ?
>
> Is there any other import/export file format provided ?
>

The .par files and friends are in binary format so the method I prefer
is
using the provided COM interfaces and access the various objects that
way.

Therefor I seek advice from those who have tried this so I may decide
whether
I shall pursue the Python trail or go for some other language like VB
or C# where
there are code samples.



From jscrerar at compuserve.com  Fri Nov 24 19:22:07 2006
From: jscrerar at compuserve.com (Jim)
Date: 24 Nov 2006 16:22:07 -0800
Subject: How do I access a main frunction from an import module?
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
	<1164393016.664066.237570@l39g2000cwd.googlegroups.com>
Message-ID: <1164414127.384387.180710@45g2000cws.googlegroups.com>


Steve wrote:
> This is an interesting question.  It almost looks like a case of
> event-driven programming, where main is the plug-in and abc is the
> framework.
> http://eventdrivenpgm.sourceforge.net/
>
> So how about something like this:
>
> ################## abc.py ####################
>
> #------------------------------------------------------------
> # an "abstract" function.
> # It should be over-ridden in the calling program
> #------------------------------------------------------------
> def m():
> 	raise AssertionError("You should have over-ridden abstract function
> m()")
>
> def a():
>     m()
>     return None
>
>
> ########### main.py ####################
> import abc  # "instantiate" the framework
>
> # define our our "concrete" function m
> def m():
>     print 'something'
>     return None
>
> #-----------------------------------------------
> # override the "abstract" function abc.m()
> # with our own "concrete" function m().
> # Comment out this line and see what happens.
> #-----------------------------------------------
> abc.m = m
>
> # invoke the a() function in the abc framework
> abc.a()
>
> #################################################

Thank you Steve.

You are correct, the project that I'm working on is an event drive
program.  And your solution works perfectly for this simple example.
My poroject does actually have what you called an "abstract" function.
Now I will know try to implement it into my project.

Thanks again.
Jim



From icebergwtf at yahoo.com.cn  Wed Nov  1 05:35:19 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Wed, 1 Nov 2006 18:35:19 +0800 (CST)
Subject: Make all files extension lower by a given directory name
Message-ID: <20061101103519.23154.qmail@web15015.mail.cnb.yahoo.com>

Hello everybody!
I need make all files extension to lower by a given directory.
Here is my solution:

import os

def make_all_file_ext_lower(root):
    for path, subdirs, files in os.walk(root):
        for file in files:
            (name, ext) = os.path.splitext(file)
            fullname = name[:len(name) - 1] + ext.lower()
            os.rename(os.path.join(path, file), os.path.join(path, fullname))

I know this code is lame and maybe someone can give a better?
Just for learning, thanks! :)

wutiefeng
06-11-01


		
___________________________________________________________ 
??????-3.5G???20M?? 
http://cn.mail.yahoo.com/


From mail at microcorp.co.za  Fri Nov  3 10:37:21 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 3 Nov 2006 17:37:21 +0200
Subject: Is there a way to define a true global across modules?
Message-ID: <005d01c6ff5e$2b5d95c0$03000080@hendrik>

I am struggling with this - I want to define a "system-wide" flag for use as a
semaphore.

It looks to me as if the only way to do it is to import all the modules that
need to access it into the main namespace using the " from whatever import * "
form.

Is there a way to have one global object known to the main module as well as say
two imported modules by using the global statement in the three places, while
using the normal "import modname " form?

It looks as if the global statement just makes the name global to the module
where it is defined, and if I use the "import modname" form I end up with a
"local global" for each module, as well as one for the main module...

Can they be "merged' into one without sticking everything into the same
namespace?

I can think of ways to work around this, but it gets a bit obfuscatory - it
would be nicer to have one name, one thing in all three places...

- Hendrik



From robert.kern at gmail.com  Fri Nov 17 18:59:34 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 17:59:34 -0600
Subject: Decimal() instead of float?
In-Reply-To: <ejlhco$5j1$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper>	<ej9epb$e23$2@sea.gmane.org><1163511997.4675.88.camel@pepper>	<4559F828.7070704@holdenweb.com><ejeuqb$ldd$1@sea.gmane.org>	<1163794251.5107.151.camel@pepper><ejl5s5$334$1@sea.gmane.org>	<1163800304.5107.179.camel@pepper>	<ejlgb0$33s$1@sea.gmane.org>
	<ejlhco$5j1$1@sea.gmane.org>
Message-ID: <ejlidj$869$1@sea.gmane.org>

Fredrik Lundh wrote:
> Terry Reedy wrote:
> 
>> This is far more accurate than any measured latitude could be.
> 
> you're saying that we don't measure geographical positions on an atomic 
> scale? ;-)
> 
> (it's too late for serious calculations, but I'd guess we're talking 
> ?ngstr?ms here, right?)

The meter was originally defined to be 1e-7 of the distance between the equator
and the North pole, so 1 degree of latitude is roughly 1e7 m/90 ~ 1e5 m. 1e-16 *
1e5 = 1e-11, 1/10th of an ?ngstr?m.

-- 
Robert Kern

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



From fredrik at pythonware.com  Sat Nov 25 16:25:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 22:25:32 +0100
Subject: my small hashlib - using pythons hash-functions
In-Reply-To: <4568b17a$0$11868$3b214f66@tunews.univie.ac.at>
References: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>	<7x7ixjp7c2.fsf@ruckus.brouhaha.com>
	<4568b17a$0$11868$3b214f66@tunews.univie.ac.at>
Message-ID: <ekaccd$807$1@sea.gmane.org>

Mathias Panzenboeck wrote:

> But the question is: *IS* this derived work? I mean, it's not copied code.
> It's the same hashing-logic, which I learned by watching pythons code.

given that it's only a few lines of code, and there's hardly any other 
way to write those lines if you want to implement the same algorithm, 
I'd say it falls under "fair use".  crediting the Python developers in 
the source code should be good enough.

</F>



From vd12005 at yahoo.fr  Sat Nov  4 08:07:46 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 4 Nov 2006 05:07:46 -0800
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <slrnekopjh.10a.nick@irishsea.home.craig-wood.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
	<7xirhwi438.fsf@ruckus.brouhaha.com>
	<slrnekopjh.10a.nick@irishsea.home.craig-wood.com>
Message-ID: <1162645666.472394.150250@e3g2000cwe.googlegroups.com>


so it has worked :) and last 12h4:56, 15 dicts with 1133755 keys, i do
not know how much ram was used as i was not always monitoring it.

thanks for all replies, i'm going to study intern and others
suggestions, hope also someone will bring a pythonic way to know memory
usage :)

best.



From joncle at googlemail.com  Thu Nov  9 09:12:55 2006
From: joncle at googlemail.com (Jon Clements)
Date: 9 Nov 2006 06:12:55 -0800
Subject: newbie class-building question
In-Reply-To: <1163080351.392680.154930@h54g2000cwb.googlegroups.com>
References: <1163075427.630088.247050@h54g2000cwb.googlegroups.com>
	<1163079226.645574.214770@m73g2000cwd.googlegroups.com>
	<1163080351.392680.154930@h54g2000cwb.googlegroups.com>
Message-ID: <1163081575.364478.70720@m7g2000cwm.googlegroups.com>


jrpfinch wrote:

> Thank you this is very helpful.  The only thing I now don't understand
> is why it is calling __coerce__.  self.wrapped and other are both
> lists.

Yes, but in "a + [5]", *a* is a myListSub object -- it's not a list! So
__coerce__ is called to try and get a common type...

Try this in myList...

# We could  check the type of 'other' to determine what we return
here....
# At the moment, we return a list, whose + operator, requires another
list so this works
# and gives an exception if it's not for us
def __coerce__(self,other):
    return self.wrapped, other

# 
def __add__(self,other):
    return self + other



hth

Jon.



From mbelugin at gmail.com  Mon Nov 20 01:21:42 2006
From: mbelugin at gmail.com (Max Belugin)
Date: Mon, 20 Nov 2006 09:21:42 +0300
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
Message-ID: <86aeb4640611192221h3dbe7f4aia61968d5dc2bbfe9@mail.gmail.com>

???? ??? PyDev (? ?? ????????)

? SPE ????????
# -*- coding: cp1251 -*-
print "????"

?? ? ?? ???? ??? ??? ??????? ? raw_input - ????? ????, ???? ?? ??????????
Spe version
0.8.3.c
Python version
2.5  (2.3 required)
wxPython version
2.6.3.3.  (2.6.1.0. required)

? C:\Python25\Lib\site.py ???????? ????????????? ????????? ?? ??????:
....
def setencoding():
    """Set the string encoding used by the Unicode implementation.  The
    default is 'ascii', but if you're willing to experiment, you can
    change this."""
    encoding = "ascii" # Default value set by _PyUnicode_Init()
    #if 0:
    if 1:
        # Enable to support locale aware default string encodings.
        import locale
        loc = locale.getdefaultlocale()
        if loc[1]:
            encoding = loc[1]
    if 0:
        # Enable to switch off string to Unicode coercion and implicit
        # Unicode to string conversion.
        encoding = "undefined"
    if encoding != "ascii":
        # On Non-Unicode builds this will raise an AttributeError...
        sys.setdefaultencoding(encoding) # Needs Python Unicode build !
...




On 11/18/06, Kirill Simonov <xi at gamma.dn.ua> wrote:
> Hi,
>
> Could anyone suggest me a simple IDE suitable for teaching Python as a
> first programming language to high school students?  It is necessary
> that it has a good support for input/output in Cyrillic.
>
> Unfortunately, most IDEs I tried failed miserably in this respect.  My
> test was simple: I've run the code
>     name = raw_input("What's your name? ")  # written in Russian
>     print "Hello, %s!" % name               # in Russian as well
> both from the shell and as a standalone script. This either caused a
> UnicodeError or just printed invalid characters.
>
> For the record, I've checked IDLE, PythonWin, Eric, DrPython, SPE, and
> WingIDE.  The only ones that worked are WingIDE and IDLE (under Linux,
> but not under Windows).
>
>
> Thanks,
> Kirill
> _______________________________________________
> ????????????? ?????? ????????????? Python ? Zope: http://zope.net.ru
> Zopyrus at itconnection.ru
> http://itconnection.ru/cgi-bin/mailman/listinfo/zopyrus
> ????? ???????? http://itconnection.ru/pipermail/zopyrus/
> Zope FAQ: http://zope.net.ru/Zope/FAQ/
> Python FAQ: http://zope.net.ru/Python/FAQ/
>


-- 
Max Belugin, http://belugin.info , ICQ:9406811

From mauriceling at acm.org  Thu Nov 16 17:27:52 2006
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 16 Nov 2006 22:27:52 GMT
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163714745.576178.157790@b28g2000cwb.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
	<455cc9ae$1@news.unimelb.edu.au>
	<1163714745.576178.157790@b28g2000cwb.googlegroups.com>
Message-ID: <455ce5e5$1@news.unimelb.edu.au>

Paul Boddie wrote:

> Maurice LING wrote:
> 
>>Say given cytoscape.jar, I'll like to be able to do this:
>>
>> >>> from cytoscape javaimport cytoscape
>> >>> c = cytoscape()
>>
>>And the tighest way I see that this can be done is for Python VM to
>>execute Java bytecodes like Python bytecodes. That is, Python VM
>>executes Java bytecodes directly and not through object mapping which I
>>think is that JPyPe is doing.
> 
> 
> This kind of thing is what I wanted to do with my javaclass experiment,
> but I lost motivation/momentum after getting only some of the things to
> work. Translating Java bytecodes isn't hard for most of the instruction
> set, although exception handling was awkward at the time (before Python
> 2.5's new-style Exception class), and I'd have to think through the
> interpackage referencing problem again (circular references are not
> typically a problem in the Java package hierarchy). In the end, I
> couldn't justify spending the time in order to use certain pieces of
> software that weren't so compelling after all.
> 
>

I take a simplistic view that Java bytecodes is all that is to be dealt 
with. And the book "Programming for the Java Virtual Machine" by Joshua 
Engel did demonstrated in principle that it is possible to program in 
Java bytecodes. There are also other researchware which tried to compile 
other languages into Java bytecodes. I am not sure if exception handling 
etc are dealt with before bytecode level. I also envision that the core 
implementation of JVM is a big switch statement, just like in Python VM 
(the bytecode executor).

Will it then be the case of adding the set of Java bytecodes into Python 
bytecodes and implementing Java bytecode operations? Or am I just 
fooling myself here?

ML


From fredrik at pythonware.com  Fri Nov 17 06:40:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 12:40:19 +0100
Subject: A question on Encoding and Decoding.
In-Reply-To: <ejk2a1$1mf$2@wake.carmen.se>
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>	<mailman.147.1163514990.32031.python-list@python.org>	<1163584122.966665.149360@k70g2000cwa.googlegroups.com>
	<ejk2a1$1mf$2@wake.carmen.se>
Message-ID: <ejk733$dg6$1@sea.gmane.org>

Johan von Boisman wrote:

> Is there ever a reason _not_ to exclusively use the unicode stringtype 
> throughout your Python program?

speed and memory use.  in 2.5, the unicode datatype is almost often as 
fast as the string type at the algorithm level, but it's still limited 
by memory bandwidth for certain operations.  it simply takes a bit more 
time to copy two or four times as much data.

but requiring four times as much memory use can be really hurting, in 
some applications, e.g.

     http://effbot.org/zone/celementtree.htm#benchmarks

a good compromise is to use 8-bit strings for ASCII-only strings, and 
Unicode strings for everything else.  ASCII strings mix well with 
Unicode, and you can use (almost) all string methods and other string 
operations on both kind of strings, without problems.

</F>



From fredrik at pythonware.com  Sun Nov 12 07:57:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 13:57:08 +0100
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
In-Reply-To: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
Message-ID: <ej75n7$gdg$1@sea.gmane.org>

p.lavarre at ieee.org wrote:

> But those objections miss the point.  Having had those troubles
> explained to me now, I'm still leaving my code unchanged - it still
> does what I mean.  That is,
> 
> eval(source, {'builtins': {}}) works enough like an evaluator of
> literals to let you duck the work of writing that evaluator until you
> need it.  Yagni.

until you forget about it, and someone uses the security hole to take 
down your company's site, or steal all the customer data from your 
database, or some such thing.

I think the PHP "I don't really get bound parameters; let's explain how 
to build SQL statements by hand first" shows that you should avoid doing 
things in stupid ways in documentation that's likely to be read by 
inexperienced programmers...

 > eval(source, {'builtins': {}}) works enough like an evaluator of
 > literals to l

eval(source, {'builtins': {}}) doesn't prevent you from using built-ins, 
though.  it's spelled __builtins__, not builtins:

 >>> eval("len('10')", {"builtins": {}})
2
 >>> eval("len('10')", {"__builtins__": {}}
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "<string>", line 1, in <module>
NameError: name 'len' is not defined

 > That's useful, and likely an FAQ.

A FAQ that discusses good ways to handle Python-like literals and 
expressions would definitely be a useful addition to the FAQ.  if nobody 
else does anything about it, I'll get there sooner or later.

</F>



From rplobue at yahoo.com  Tue Nov 21 01:07:48 2006
From: rplobue at yahoo.com (rplobue at yahoo.com)
Date: 20 Nov 2006 22:07:48 -0800
Subject: move up a level
Message-ID: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>

alright, noob question: i want to open a file in a directory above the
current one i'm in.  I'm trying to use myfile =
open('../thefileiwant.txt', 'r')  but the ../ doesn't work.  How do i
do it?



From interfecus at gmail.com  Fri Nov 24 22:17:43 2006
From: interfecus at gmail.com (Timothy Goddard)
Date: 24 Nov 2006 19:17:43 -0800
Subject: Ruby/Python/REXX as a MUCK scripting language
In-Reply-To: <2006112418112116807-zobeid@techiecom>
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <1164424663.700714.71730@h54g2000cwb.googlegroups.com>


Tony Belding wrote:
> I'm interested in using an off-the-shelf interpreted language as a
> user-accessible scripting language for a MUCK.  I'm just not sure if I
> can find one that does everything I need.  The MUCK must be able to
> call the interpreter and execute scripts with it, but the interpreter
> must also be able to call functions in the MUCK code.  And then there's
> the security issue that really worries me. . .  I have to be able to
> limit what the interpreter can execute.  I can't have my users running
> scripts that access the console, access the filesystem or sockets
> directly, or call libraries or other binaries outside the MUCK.
>
> Is this practical?  I'm thinking of Ruby or Python for this, if they
> can meet the requirements.
>
> I might even consider REXX. . .  I remember ARexx from my Amiga days,
> and how great it was for string manipulation and application scripting.
>  However. . .  My immediate target platform, Mac OS X, comes with Ruby
> and Python but not REXX, so that's a disadvantage.
>
> My final option would be to create my own language interpeter where I
> have control over everything that happens.  That is what MUCKs have
> always done in the past.  But the result was always quirky, limited
> languages like MUF (Multi-User Forth) which really turn off a lot of
> coders.  Furthermore, I've never created a language before, and it
> would be a lot of extra work for me.
>
> --
> Tony Belding, Hamilton Texas

Sandboxing is possible in recent versions of Ruby using _why's sandbox
package (http://code.whytheluckystiff.net/sandbox/). For a MUCK a
custom language might be better though - creating sandboxes for any
conventional language is likely to be too expensive to repeat for a
thousand objects at regular intervals. A custom language would make it
much easier to manage security while retaining decent performance.



From duncan.booth at invalid.invalid  Mon Nov 27 09:45:48 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Nov 2006 14:45:48 GMT
Subject: Inheritance from builtin list and override of methods.
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr>
	<ekecd9$e8c$1@sea.gmane.org>
	<mailman.768.1164637881.32031.python-list@python.org>
Message-ID: <Xns988896361B9C5duncanbooth@127.0.0.1>

Michalis Giannakidis <mgiann at beta-cae.gr> wrote:

> On Monday 27 November 2006 11:50, Fredrik Lundh wrote:
> 
>> "obj[index] = value" maps to "obj.__setitem__(index, value)". 
>> reading the documentation might help; start here:
>>
>>      http://docs.python.org/ref/specialnames.html
> 
> In this documentation page it also says:
> --snip---
> then x[i] is equivalent3.2 to x.__getitem__(i). 
> --snip--
> This, and other statements, are only roughly true for instances of
> new-style classes. 
> --snip--
> 
> So which statements are actually true for new style classes? 

I think it means that the statements are true in general, but there may be 
specific corner cases which break them. Usually you can assume that the 
rough description will be good enough.

> 
> Is l[0]=1 completely different from l.append(1) or maybe insert?

Yes. It neither appends nor inserts.

> And is there a mechanism in Python that will allow me to override the 
> operators of a class, for all its occurrences, even the ones
> implemented on C built-in objects?

No.



From sjmachin at lexicon.net  Tue Nov 14 06:55:09 2006
From: sjmachin at lexicon.net (John Machin)
Date: 14 Nov 2006 03:55:09 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <1163504683.480050.242050@h54g2000cwb.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<1163504683.480050.242050@h54g2000cwb.googlegroups.com>
Message-ID: <1163505308.880218.310810@b28g2000cwb.googlegroups.com>


John Machin wrote:

>    new = line[:-1] + "===\n"

To allow for cases where the last line in the file is not terminated
[can happen],
this should be:

    new = line.rstrip("\n") + "===\n"
    # assuming you want to fix the unterminated problem.

Cheers,
John



From nick at craig-wood.com  Thu Nov  9 05:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 09 Nov 2006 04:30:04 -0600
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
Message-ID: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>  Dan Lenski wrote:
> 
> > So, is there another toolkit I should be looking at?
> 
>  I highly recommend wxPython.

I'd second that!

There is a book also

  "WxPython in Action"

  http://www.amazon.com/Wxpython-Action-Noel-Rappin/dp/1932394621

Which is certainly my preferred way of learning new stuff!

>  It's very mature, full-featured, and portable, and fairly easy to
>  learn as well.

...with native look and feel on each platform unlike GTK / TK

It has got a huge set of widgets and an excellent demo program in
which you can try them all out and steal their code.

There are some bits of it in which the C++ heritage sticks out, but
over the years the toolkit designers have been tucking those under the
carpet.  The MethodNaming is a bit odd too!

A minor annoyance is that there are a number of features which only
work on a subset of the platforms.  These are well documented though.

IMHO the best of the toolkits, but it is a personal choice and yours
may differ!

There is also PyQT which we wrote off as we wanted to write commercial
applications too.  As it happens we have a commercial QT licence, but
we decided we didn't want to have to incurr the additional expense of
renewing it.

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


From robert.kern at gmail.com  Sat Nov 11 18:03:55 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 11 Nov 2006 17:03:55 -0600
Subject: numpy/scipy: correlation
In-Reply-To: <ej4akj$vbe$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
Message-ID: <ej5kt7$djk$1@sea.gmane.org>

robert wrote:
> Is there a ready made function in numpy/scipy to compute the correlation y=mx+o of an X and Y fast: 
> m, m-err, o, o-err, r-coef,r-coef-err ?

And of course, those three parameters are not particularly meaningful together.
If your model is truly "y is a linear response given x with normal noise" then
"y=m*x+o" is correct, and all of the information that you can get from the data
will be found in the estimates of m and o and the covariance matrix of the
estimates.

On the other hand, if your model is that "(x, y) is distributed as a bivariate
normal distribution" then "y=m*x+o" is not a particularly good representation of
the model. You should instead estimate the mean vector and covariance matrix of
(x, y). Your correlation coefficient will be the off-diagonal term after
dividing out the marginal standard deviations.

The difference between the two models is that the first places no restrictions
on the distribution of x. The second does; both the x and y marginal
distributions need to be normal. Under the first model, the correlation
coefficient has no meaning.

-- 
Robert Kern

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



From timothy at open-networks.net  Thu Nov 16 19:15:35 2006
From: timothy at open-networks.net (timmy)
Date: Fri, 17 Nov 2006 10:15:35 +1000
Subject: Secure Python
In-Reply-To: <1163689149.613418.40020@b28g2000cwb.googlegroups.com>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au> <4s38t9Ftln2aU1@mid.uni-berlin.de>
	<1163689149.613418.40020@b28g2000cwb.googlegroups.com>
Message-ID: <455cfea5$1@quokka.wn.com.au>

Paul Boddie wrote:
> Diez B. Roggisch wrote:
> 
> 
> [Multiplayer game servers]
> 
> 
>>Now how exactly does linux (or any other resource limiting technique on any
>>OS) help here - killing the whole game server surely isn't a desirable
>>solution when one player goes berserk, might it be intentionally or not.
> 

> And this is where the hot topics collide: people want performant
> multitasking with lots of shared state (the global interpreter lock
> controversy) together with sandboxing so that the individual threads
> can't access most of that shared state (the restricted execution
> controversy). 

i'm not talking about sandboxing, that's a whole different kettle of 
fish. i'm talking about resource managment options you can set in for 
instance, the linux kernel.
you can limit the cpu and memory a process uses while still allowing it 
the same access it would have outside of a sandbox. that way if any 
clever monkeys try to dos you they merely consume their alloted quota.


From johnjsal at NOSPAMgmail.com  Tue Nov  7 16:15:39 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 16:15:39 -0500
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov  7)
In-Reply-To: <eiqr89$20d$1@lairds.us>
References: <eiqr89$20d$1@lairds.us>
Message-ID: <4550f7b9$0$14445$c3e8da3@news.astraweb.com>

Cameron Laird wrote:

>     Fredrik Lundh collects pyidioms:
> 	http://effbot.org/zone/python-lists.htm

Not working?


From peter.mosley at talk21.com  Thu Nov  9 18:28:41 2006
From: peter.mosley at talk21.com (peter)
Date: 9 Nov 2006 15:28:41 -0800
Subject: Tkinter check box behaviour - Windows / Linux discrepancy
Message-ID: <1163114920.900203.306550@h48g2000cwc.googlegroups.com>

I've come across a weird difference between the behaviour of the
Tkinter checkbox in Windows and Linux.  The issue became apparent in
some code I wrote to display an image in a fixed size canvas widget. If
a checkbox was set then the image should be shrunk as necessary to fit
the canvas while if cleared it should appear full size with scrollbars
if necessary.

The code worked fine under Linux (where it was developed).  But under
Windows, the first click in the checkbox did nothing, then subsequent
clicks adjusted the size according to the PREVIOUS, not the current,
checkbox state.

I've isolated the problem in the code below, which shows a single
checkbox and a label to describe its state. It works ok under Linux,
but in Windows it is always one click behind.

Any ideas?  I am using
   Linux: Fedora Core 3, Python 2.3.4
   Windows: Windows NT, Python 2.3.4

Peter

========================================================================
import Tkinter as tk



class App:

    def __init__(self,frmMain):

        """
        Demonstrate difference in Windows / Linux handling of check box

        Text in lblTest should track check box state
        """

        # Set up form

        self.intTest=tk.IntVar()

        self.chkTest=tk.Checkbutton(frmMain,text='Click
me!',variable=self.intTest)

        self.chkTest.grid(row=0,column=0,padx=5,pady=5,sticky=tk.W)

        self.chkTest.bind('<ButtonRelease-1>',self.chkTest_click)



        self.lblTest=tk.Label(frmMain,text='Dummy')

        self.lblTest.grid(row=1,column=0,padx=5,pady=5,sticky=tk.W)


        self.chkTest_click() # so as to initialise text

    def chkTest_click(self,event=None):
        # read check box state and display appropriate text
        if self.intTest.get()==0:
            self.lblTest.config(text='Check box cleared')
        else:
            self.lblTest.config(text='Check box set')




if __name__=='__main__':

    frmMain=tk.Tk()

    app=App(frmMain)

    frmMain.mainloop()



From diesch at spamfence.net  Sat Nov 11 11:50:37 2006
From: diesch at spamfence.net (Florian Diesch)
Date: Sat, 11 Nov 2006 17:50:37 +0100
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
Message-ID: <20061111165037.421F.0.NOFFLE@dieschf.news.arcor.de>

"Dan Lenski" <dlenski at gmail.com> wrote:

> So, is there another toolkit I should be looking at?  Having something
> that can run easily on Cygwin and native Windows is a priority so that
> I can quickly move programs to new measurement computers.  I like GTK a
> lot and Tk is growing on me too.. are there any higher-level "wrapper"
> toolkits for GTK and Tk?

For Gtk there's Kiwi <http://www.async.com.br/projects/kiwi/>



   Florian
-- 
<http://www.florian-diesch.de/>


From sjmachin at lexicon.net  Wed Nov  8 18:45:01 2006
From: sjmachin at lexicon.net (John Machin)
Date: 8 Nov 2006 15:45:01 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
Message-ID: <1163029501.572974.245010@b28g2000cwb.googlegroups.com>

p.lavarre at ieee.org wrote:
> Can Python not express the idea of a three-byte int?

It is a bit hard to determine what that (rhetorical?) question means.
Possible answers:
1. Not as concisely as a one-byte struct code -- as you presumably have
already determined by reading the manual ...
2. No, but when 24-bit machines become as popular as they were in the
1960s, feel free to submit an enhancement request :-)

>
> For instance, in the working example below, can we somehow collapse the
> three calls of struct.pack into one?
>
> >>> import struct
> >>>
> >>> skip = 0x123456 ; count = 0x80
> >>>
> >>> cdb = ''
> >>> cdb += struct.pack('>B', 0x08)
> >>> cdb += struct.pack('>I', skip)[-3:]
> >>> cdb += struct.pack('>BB', count, 0)
> >>>
> >>> print ' '.join(['%02X' % ord(xx) for xx in cdb])
> 08 12 34 56 80 00
> >>>

You could try throwing the superfluous bits away before packing instead
of after:

| >>> from struct import pack
| >>> skip = 0x123456; count = 0x80
| >>> hi, lo = divmod(skip, 0x10000)
| >>> cdb = pack(">BBHBB", 0x08, hi, lo, count, 0)
| >>> ' '.join(["%02X" % ord(x) for x in cdb])
| '08 12 34 56 80 00'

but why do you want to do that to concise working code???



From john at castleamber.com  Thu Nov 16 13:35:52 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 18:35:52 GMT
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
	<mailman.243.1163673962.32031.python-list@python.org>
	<2006111607574875249-jameshcunningham@gmailcom>
	<1163699165.847310.285630@e3g2000cwe.googlegroups.com>
	<2006111613223375249-jameshcunningham@gmailcom>
Message-ID: <Xns987D80268EA3Bcastleamber@130.133.1.4>

James Cunningham <jameshcunningham at gmail.com> wrote:

> On 2006-11-16 12:46:05 -0500, "walterbyrd" <walterbyrd at iname.com> said:
> 
>> 
>> James Cunningham wrote:
>> 
>>> Nope. It disproves your assertion that "certainly all of the lower
>>> priced hosters" use Apache 1.3.
>> 
>> Okay, where can I get Python and Apache 2.X for $10 a year?
> 
> Frankly, I can't find *anybody* who advertises hosting for <= $10 a 
> year - the cheapeast I can find is $18 - and such a plan would be too 
> limited for me to consider anyway.

hostingforabuck.com : $12/year, without domain name of course. Not sure on 
Apache version or Python, but the guy who runs it is extremely helpful and 
fast.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From inq1ltd at verizon.net  Thu Nov  9 14:31:52 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 09 Nov 2006 14:31:52 -0500
Subject: Python deployment options
In-Reply-To: <f7d7d76f4fcd.4fcdf7d7d76f@monash.edu.au>
References: <f7d7d76f4fcd.4fcdf7d7d76f@monash.edu.au>
Message-ID: <200611091431.52975.inq1ltd@verizon.net>

Rooy,

If you are still having problems with py2exe, I 
suggest you start with the simplest program you 
can build and include everything in one file.  
Make that work like the simple examples in the 
py2exe samples.


jim-on-linux
http://www.inqvista.com


On Wednesday 08 November 2006 22:04, Hieu Hoang 
wrote:
> Hi list,
> I have packaged a few pygames to one exe file
> with pyinstaller ( http:/
> /pyinstaller.python-hosting.com/ ), sent them
> to my friends and the executables
> work. Running them shows a Fatal Error dialog
> box with only "MSVCR71.DLL", but nothing
> breaks, despite whether the system has python
> or not.
> I haven't been able to figure out py2exe setup
> script yet, so I can't compare them.
>
> Hope this helps,
> Rooy


From mike.klaas at gmail.com  Thu Nov  9 15:38:20 2006
From: mike.klaas at gmail.com (Klaas)
Date: 9 Nov 2006 12:38:20 -0800
Subject: Python memory usage
In-Reply-To: <1162967080.689144.320940@f16g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>
Message-ID: <1163104700.515953.4210@b28g2000cwb.googlegroups.com>


placid wrote:

> Actually i am executing that code snippet and creating BeautifulSoup
> objects in the range()  (now xrange() ) code block.

Right; I was referring specifically to abominations like
range(1000000), not looping over an incrementing integer.

-Mike



From no-spam at no-spam-no-spam.invalid  Sat Nov 18 08:55:56 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 18 Nov 2006 14:55:56 +0100
Subject: numpy: frequencies
Message-ID: <ejn3dh$b7n$1@news.albasani.net>

I have an integer array with values limited to range(a,b) like:

ia=array([1,2,3,3,3,4,...2,0,1])

and want to speedly count the frequencies of the integers into get a density matrix.
Is this possible without looping?


Question 2: is it possible to compute a "moving maximum" without python looping

ia=array([4,2,1,5,3,2,2,0,1,1]) 
-> mvmax(ia,3) ->
         [4,4,4,5,5,5,3,2,2,1]) 


Robert


From sjmachin at lexicon.net  Thu Nov  9 12:34:56 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 09:34:56 -0800
Subject: substring search without using built in utils
In-Reply-To: <pan.2006.11.09.13.33.09.874729@REMOVE.THIS.cybersource.com.au>
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
	<mailman.1954.1163038984.11739.python-list@python.org>
	<45530805$0$10013$426a74cc@news.free.fr>
	<1163071862.056378.13870@f16g2000cwb.googlegroups.com>
	<pan.2006.11.09.13.33.09.874729@REMOVE.THIS.cybersource.com.au>
Message-ID: <1163093696.834599.15250@k70g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> On Thu, 09 Nov 2006 03:31:02 -0800, John Machin wrote:
>
> >
> > Bruno Desthuilliers wrote:
> >> Gabriel Genellina wrote:
> >> > At Wednesday 8/11/2006 22:29, zeal elite wrote:
> >> >
> >> >> I am looking for substring search python program without using the
> >> >> built in funtions like find, or 'in'.
> >> >
> >> > The only reasonable usage for such a constraint would be a school
> >> > assignment so: don't cheat and do your homework!
> >> >
> >>
> >> OTHO, looking for existing solutions to a same or similar problem and
> >> studying them is usually considerer good practice in real-life
> >> programming jobs !-)
> >>
> >
> > Looking at an existing solution for substring search that was coded in
> > Python, instead of using the built-in functionality would IMHO be
> > considered extremely bad practice in a real-life programming job.
>
> Sure. But what if the data type in question wasn't a string, but a list?
>
>
> Given a source list, find the offset of a target sub-list within the
> source list, in other words, find for lists.
>
> i.e. search(source, target) returns n if source[n:n+len(target)] == target
> for any sequence type.
>

In that case, in a real-life enterprisey environment, you'd just code
up the brute-force naive method and wait till someone screamed about
the speed. If that happened, you'd have a look at how "find" was
implemented for unicode, because it can't use any tricks that depend on
there being a small number (e.g. 256) of symbols in the alphabet,
and/or you'd fire up your googler and see what had been done outside
Python ...

> Yes, I know I'm changing the constraints of the problem.
(a) There wasn't a problem to start with.
(b) It's called "moving the goalposts".

> Now for a real
> challenge, change the search from a one-dimensional data structure to two.
>
> (The solution is left as an exercise for the class.)

The class knows all about Google. Better leap into the seat of your
plagiarism detection machine and start pedalling :-)



From skip at pobox.com  Tue Nov 21 16:19:15 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 21 Nov 2006 15:19:15 -0600
Subject: Psycopg2 | collapse row to string
In-Reply-To: <136ED738BD4F1545B97E4AC06FF6370734BFFC@DMSP-MSG-EVS01.mail.pvt>
References: <136ED738BD4F1545B97E4AC06FF6370734BFFC@DMSP-MSG-EVS01.mail.pvt>
Message-ID: <17763.27987.66633.21218@montanaro.dyndns.org>


    Jeff> Is there an easy want to create a delimited string from this, for
    Jeff> example:

    Jeff> for row in rows:
    Jeff>     if checksomething == 100:
    Jeff>         newline = row[].combine("delimiter of some kind")
    Jeff>         resultfile.write(newline)

By "delimited string" do you mean something that can handle fields in which
your delimiter appears?  If so, you should look at the csv.writer class.  If
you're absolutely certain your delimiter won't occur in your output, you can
just stringify the values and join them:

    delimiter = ","
    for row in rows:
        if checksomething == 100:
            resultfile.write(delimiter.join([str(elt) for elt in row]))

If you know all your row values are already strings it's even easier:

    delimiter = ","
    for row in rows:
        if checksomething == 100:
            resultfile.write(delimiter.join(row))

Skip


From nomail at nixmail.com  Sat Nov 18 04:07:53 2006
From: nomail at nixmail.com (DarkBlue)
Date: Sat, 18 Nov 2006 17:07:53 +0800
Subject: How can I speed this function up?
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>
	<mailman.402.1163826460.32031.python-list@python.org>
Message-ID: <455ecd69@127.0.0.1>

Just to show how much a system set up
impacts these results:
Result from suse10.1 64 , python 2.4 
with AMD FX-55 cpu and about 12 active apps
running in the background. 7200rpm sata drives.

Preparing data...
[write_data1] Preparing output file...
[write_data1] Writing...
[write_data1] Done in 5.43 seconds.
[write_data4] Preparing output file...
[write_data4] Writing...
[write_data4] Done in 4.41 seconds.
[write_data_flush] Preparing output file...
[write_data_flush] Writing...
[write_data_flush] Done in 5.41 seconds.
[write_data_per_line] Preparing output file...
[write_data_per_line] Writing...
[write_data_per_line] Done in 4.4 seconds.
[write_data_once] Preparing output file...
[write_data_once] Writing...
[write_data_once] Done in 4.28 seconds.



From rajani.vemula at gmail.com  Thu Nov  9 07:06:38 2006
From: rajani.vemula at gmail.com (Raj)
Date: 9 Nov 2006 04:06:38 -0800
Subject: Post data using the libcurl
Message-ID: <1163073998.639966.165840@h54g2000cwb.googlegroups.com>

Hi,
I am newbie to programming with libcurl. the problem is i want to send
my gmail username and password outside the browser and get access to my
mail. this i am doing with LibCurl. Though i dont get any errors, i am
nt able to get the o/p Can anyone kindly help. i will attach the
program here
#include <curl/curl.h>
 #include <curl/types.h>
 #include <curl/easy.h>

 int main(int argc, char *argv[])
 {
   CURL *curl;
   CURLcode res;

   struct curl_httppost *formpost=NULL;
   struct curl_httppost *lastptr=NULL;
   struct curl_slist *headerlist=NULL;
   char buf[] = "Expect:";

   curl_global_init(CURL_GLOBAL_ALL);

   /* Fill in the file upload field */
   curl_formadd(&formpost,
              &lastptr,
                CURLFORM_COPYNAME, "rajani.vemula",
                CURLFORM_END);

   /* Fill in the filename field */
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "xxxxx",
                CURLFORM_END);
   curl_formadd(&formpost,
                &lastptr,
                CURLFORM_COPYNAME, "null",
                CURLFORM_COPYCONTENTS, "Sign in",
                CURLFORM_END);




   curl = curl_easy_init();
   /* initalize custom header list (stating that Expect: 100-continue
is
 not
      wanted */
   headerlist = curl_slist_append(headerlist, buf);
   if(curl) {
     /* what URL that receives this POST */
     curl_easy_setopt(curl, CURLOPT_URL,"
http://mail.google.com/mail");
     curl_easy_setopt(curl, CURLOPT_PROXY, "proxyname");
   curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "User:Password)";
       /* only disable 100-continue header if explicitly requested */
       curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
     res = curl_easy_perform(curl);

     /* always cleanup */
     curl_easy_cleanup(curl);

     /* then cleanup the formpost chain */
     curl_formfree(formpost);
      curl_slist_free_all(headerlist
  }
   return 0;
 }

Thanks



From antoine at vo.lu  Wed Nov 29 11:47:52 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Wed, 29 Nov 2006 17:47:52 +0100
Subject: why would anyone use python when java is there?
In-Reply-To: <mailman.818.1164764375.32031.python-list@python.org>
References: <mailman.818.1164764375.32031.python-list@python.org>
Message-ID: <76ec1$456db9b6$544ab9ad$3494@news.hispeed.ch>

+1

?ric Daigneault wrote:
>  > wtf
> 
> a reasonable question...
> 
> But before I run circle yelling "the trolls are here, the trolls are 
> here"  I got one for you...
> 
> why would anyone use java when python is there??
> 
> ;-)
> 
> .^_^.
> 
> Eric :D,
> 


From tjreedy at udel.edu  Fri Nov 17 18:24:16 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 17 Nov 2006 18:24:16 -0500
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<ej9epb$e23$2@sea.gmane.org><1163511997.4675.88.camel@pepper>
	<4559F828.7070704@holdenweb.com><ejeuqb$ldd$1@sea.gmane.org>
	<1163794251.5107.151.camel@pepper><ejl5s5$334$1@sea.gmane.org>
	<1163800304.5107.179.camel@pepper>
Message-ID: <ejlgb0$33s$1@sea.gmane.org>


"Michael B. Trausch" <fd0man at gmail.com> wrote in message 
news:1163800304.5107.179.camel at pepper...
> Let's say that I want to work with the latitude 33.6907570.  In Python, 
> that number > can not be stored exactly without the aid of 
> decimal.Decimal().

> >>> 33.6907570
> 33.690756999999998
> >>>

> As you can see, it loses accuracy after the 6th decimal place.

No, it loses accuracy in the 15th decimal place, which is the 17th digit.
This is far more accurate than any measured latitude could be.
If the above is a measurement, it represents anything from 33.69075695
to 33.69075705.  The conversion error would have to be multiplied by some 
number of millions before it would be visible in the 7th decimal place 
(your last).

Any trigonometric calculations will use an *approximate* value of pi and 
polynomial *approximations* of the theoretical functions.

Perhaps you have been given impossible conditions to fulfill.

Terry Jan Reedy





From http  Sun Nov  5 01:42:08 2006
From: http (Paul Rubin)
Date: 04 Nov 2006 22:42:08 -0800
Subject: python GUIs comparison (want)
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
	<1162708081.974808.283370@i42g2000cwa.googlegroups.com>
Message-ID: <7xy7qql7i7.fsf@ruckus.brouhaha.com>

"Mudcat" <mnations at gmail.com> writes:
> When you say far better widgets, do you mean that it has a greater
> number of widgets to choose from, or that the types of widgets are
> basically the same but have a greater amount of flexibility in them?

There's a lot more and they look a lot better.  Tk widgets are quite
stylized and independently of that they look like crap.

> Personally I find programming in Tkinter fairly simple and
> straight-forward. 

Tkinter programming is not too bad once you get used to it, if you
don't mind the limited widget set and weird restrictions, that is
true.  Plus, it's included in the Python distro, which is the main
reason I keep using it.  That's worked ok for me because the apps I've
written with it just needed basic GUI functionality and were not too
demanding of stylistic fine points.  But Tkinter seriously dated by
now, and I don't think its widgets are anywhere near slick enough for
wide-distribution desktop apps that have to look polished.

> What would be really cool is if someone were to come up with a UI
> that has a totally new look and feel than anything that currently
> exists on Windows.

No that would suck.  Best to try to stay as close as possible to the
native widgets on whatever the underlying platform is.  If you want
to depart from the native UI, then start from scratch and write a whole
new window system with a complete app suite etc.


From mountney at hotmail.com  Mon Nov 20 14:01:15 2006
From: mountney at hotmail.com (Tom Mountney)
Date: Mon, 20 Nov 2006 11:01:15 -0800
Subject: Help!!!  New to Python and getting an error I can't figure out
Message-ID: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>

Any help is greatly appreciated!!!

I'm learning python and from a book I tried this program: (all the
indentation is there just doen't appear in this EMail)
----------------------------------------------------------

#file grep.py
import os
from os import isfile

class dirGrep:
 def __init__(self, directory):
  self.files = filter(isfile,
   [os.path.join(directory, x) for x in os.listdir(directory)])

 def findLines(self, pattern, filelist=none):
  """Accepts pattern, returns lines that contain pattern.
  Optional 2nd argument is a filelist to search"""
  if not filelist:
   filelist = self.files
  results = []
  for file in filelist:
   fo = open(file)
   results += [x for x in fo.readlines()
    if x.find(pattern) != -1]
   fo.close() #explicit close of the file object
  return results

 def findfiles(self, pattern):
  "Accepts pattern, returns filenames that contain pattern"
  return[x for x in self.files if x.find(pattern) != -1

#test
if __name__ == "__main__":
 (g = dirGrep("c:\\winnt"))
 files = g.findFiles(".py")
 print g.findLines("java", files)

When I try to run the program - python grep.py - I get the following error:

C:\> python grep.py
  File "grep.py", line 28
    if __name__ == '__main__':
                                             ^
SyntaxError: invalid syntax

What am I doing wrong?
Thanks for any help




From eurleif at ecritters.biz  Thu Nov 16 17:08:30 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 16 Nov 2006 17:08:30 -0500
Subject: Question about unreasonable slowness
In-Reply-To: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
Message-ID: <455ce05a$0$5794$4d3efbfe@news.sover.net>

allenjo5 at mail.northgrum.com wrote:
> i = 0
> while (i < 20):
>   i = i + 1

for i in xrange(20):

>   (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")  # for testing, the
> spawned shell does nothing
>   print 'next'
> #  for line in shellOut:
> #       print line
> 
> On my system (AIX 5.1 if it matters, with Python 2.4.3), this simple
> loop spawning 20 subshells takes .75 sec.  Ok, that's reasonable.  Now,
> if I uncomment the two commented lines, which loop over the empty
> shellOut array, the progam now takes 11 secs.   That slowdown seems
> very hard to believe.  Why should it slow down so much?

The key fact here is that shellOut isn't an array; it's a living,
breathing file object. If you don't iterate over it, you can run all 20
shell processes in parallel if necessary; but if you do iterate over it,
   you're waiting for sh's stdout pipe to reach EOF, which effectively
means you can only run one process at a time.

On my system (OS X 10.4 with Python 2.5 installed), your code runs in
.187 secs with the loop commented out, and in .268 secs otherwise. But I
guess AIX's sh is slower than OS X's.


From bignose+hates-spam at benfinney.id.au  Sun Nov 12 18:30:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 13 Nov 2006 10:30:31 +1100
Subject: Random image text generation?
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
	<4557a186$0$5806$4d3efbfe@news.sover.net>
Message-ID: <87ac2wi6p4.fsf@benfinney.id.au>

Leif K-Brooks <eurleif at ecritters.biz> writes:

> Steven D'Aprano wrote:
> > For a text only solution, consider putting up a natural language
> > question such as:
> > 
> > What is the third letter of 'national'?
> > What is four plus two?
> > How many eggs in a dozen?
> > Fill in the blank: Mary had a little ____ its fleece was white as snow.
> > Cat, Dog, Apple, Bird. One of those words is a fruit. Which one?
>
> That wouldn't work as a true CAPTCHA (Completely Automated *Public*
> Turing test to tell Computers and Humans Apart), since making the
> list of questions and answers public would defeat its purpose.

The "Public" part of a CAPTCHA is the algorithm. The data consumed and
produced by the algorithm don't need to be publicly correlated -- and
indeed shouldn't be, for exactly the reason you state.

-- 
 \        "To me, boxing is like a ballet, except there's no music, no |
  `\    choreography, and the dancers hit each other."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From kaushalshriyan at gmail.com  Mon Nov  6 04:00:32 2006
From: kaushalshriyan at gmail.com (kaushal)
Date: 6 Nov 2006 01:00:32 -0800
Subject: Learning Python
Message-ID: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>

Hi

How do i start Learning Python,is there any reference material which I
can refer since I dont have
any programming experience

Thanks and Regards

Kaushal



From bernard.chhun at gmail.com  Tue Nov 28 16:16:41 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 28 Nov 2006 13:16:41 -0800
Subject: SPE (Stani's Python Editor) web site?
In-Reply-To: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
References: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
Message-ID: <1164748601.099263.98060@l12g2000cwl.googlegroups.com>


I can send you the latest tar.gz ( SPE-0.8.3.c-wx2.6.1.0.tar ) file if
you want it :)

Bernard

John DeRosa wrote:
> SPE's site (http://pythonide.stani.be/) has been inaccessible to me
> for at least a day.  Can anyone else get to it?
>
> I looked on Google and didn't see any new locations for SPE.  Has it
> recently moved to somewhere else?  I dimly recall a post by Stani
> wherein he said he might move the site, but I can't find it...
> 
> John



From steve at REMOVEME.cybersource.com.au  Thu Nov 16 21:06:05 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 17 Nov 2006 13:06:05 +1100
Subject: How fuzzy is get_close_matches() in difflib?
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>

On Thu, 16 Nov 2006 16:40:49 -0800, John Henry wrote:

> I am just wondering what's with get_close_matches() in difflib.  What's
> the magic?   How fuzzy do I need to get in order to get a match?


Why don't you try it and see?

>>> from difflib import get_close_matches
>>> get_close_matches("appel", ["ape", "apple", "peach", "puppy"])
['apple', 'ape']
>>> import keyword as _keyword
>>> get_close_matches("wheel", _keyword.kwlist)
['while']
>>> get_close_matches("apple", _keyword.kwlist)
[]
>>> get_close_matches("accept", _keyword.kwlist)
['except']


Those example, by the way, come from here:

>>> help(get_close_matches)




-- 
Steven



From steve at holdenweb.com  Mon Nov 13 21:43:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Nov 2006 02:43:01 +0000
Subject: Unpacking sequences and keywords in one function call
In-Reply-To: <nNmdnervt49hg8TYnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
	<nNmdnervt49hg8TYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <ejbadh$7ih$1@sea.gmane.org>

Noah Rawlins wrote:
> ram wrote:
>> Stupid question #983098403:
>>
>> I can't seem to pass an unpacked sequence and keyword arguments to a
>> function at the same time. What am I doing wrong?
>>
>> def f(*args, **kw):
>>     for a in args:
>>         print 'arg:', a
>>     for (k,v) in kw.iteritems():
>>         print k, '=', v
>>
>>>>> f(1,2)
>> arg: 1
>> arg: 2
>>
>>>>> f(*[1,2])
>> arg: 1
>> arg: 2
>>
>>>>> f(1,2, a=1)
>> arg: 1
>> arg: 2
>> a = 1
>>
>>>>> f(*[1,2], a=1)
>>     File "<stdin>", line 1
>>       f(*[1,2], a=1)
>>                   ^
>>     SyntaxError: invalid syntax 
>>
>> Thanks,
>> Rick
>>
> 
> I don't know if it's because there's some potential ambiguity (that I'm 
> not seeing), but yeah, you just can't do that.  This should work though...
> 
>  >>> f(*[1, 2], **{'a':1})
> 
> noah

You should be ok as long as you use the following ordering of actual 
arguments in a function call:

   1. Positional arguments
   2. Keyword arguments
   3. * sequence
   4. ** dict

In other words try (untested):

   f(a=1, *[1, 2])

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From g.brandl-nospam at gmx.net  Mon Nov  6 10:06:11 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 06 Nov 2006 16:06:11 +0100
Subject: Python Distilled
In-Reply-To: <SeE3h.5944$lx6.4005@tornado.texas.rr.com>
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<pan.2006.11.06.10.11.35.335058@gmx.net>
	<SeE3h.5944$lx6.4005@tornado.texas.rr.com>
Message-ID: <einj15$5v9$1@news.albasani.net>

Paul McGuire wrote:
> "Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
> news:pan.2006.11.06.10.11.35.335058 at gmx.net...
>> In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
>> wrote:
>>
>>> I'd also like to remove any deprecated or stuff which is left in for
>>> backwards functionality (eg Classic classes).
>>
>> Classic classes are still needed for exceptions:
>>
>>>>> class E(object):
>> ...    pass
>> ...
>>>>> raise E
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in <module>
>> TypeError: exceptions must be classes, instances, or strings (deprecated),
>> not type
>>
>> Ciao,
>> Marc 'BlackJack' Rintsch
> 
> I thought exceptions were converted to new-style classes for Py2.5 
> (http://docs.python.org/whatsnew/pep-352.html).

Yes, they were. Still, you can't raise instance of arbitrary new-style classes
as exceptions, and you will never be able to. In Py3k, only instances of
"BaseException" subclasses will be raisable.

Georg


From fred at adventistcare.org  Mon Nov 20 11:04:11 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Mon, 20 Nov 2006 11:04:11 -0500
Subject: Python development time is faster.
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E37D@accmail2.sunbelt.org>

My experience is that developing apps that use significant external
libraries (like GUI's) benefit from a 90% reduction in the lines of code
written.

Like others have said, not writing tons of framework before you can code the
real problem is a significant benefit.

My design goals are for a method to be <10 lines of code and a class
definition to fit on one printed page (ok, 10pt font ;). I don't always
achieve these goals, but more often than not.

In order to achieve these goals, I seldom comment and rely on long function
names and clear variable names.  Perhaps that's a bad thing, but I've found
that the comments were always obsolete when I picked up someone else's code,
then they just got in the way.

Finally coding in python is fun, if it's fun, it's easier.  If it's easier,
you get more done...


From antroy at gmail.com  Wed Nov  8 07:10:54 2006
From: antroy at gmail.com (Ant)
Date: 8 Nov 2006 04:10:54 -0800
Subject: Problem exiting application in Windows Console.
Message-ID: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>

Hi all,

I'm putting together a simple help module for my applications, using
html files stored in the application directory somewhere. Basically it
sets up a basic web server, and then uses the webbrowser module to
display it in the users browser. I have it set up to call sys.exit(0)
if the url quit.html is called, but for some reason (on Windows XP via
the cmd.exe shell) python won't let me have the console back. I get the
System Exit stack trace OK:

Exiting...
----------------------------------------
Exception happened during processing of request from ('127.0.0.1',
3615)
Traceback (most recent call last):
...
  File "C:\Documents and Settings\aroy\My Do...
    sys.exit(0)
SystemExit: 0
----------------------------------------


However, at this point instead of getting back to a command prompt, I
get an unresponsive console. Hitting CTRL-Break gets me the command
prompt back, but I would have expected to get back the command prompt
as soon as the sys.exit(0) had completed.

Here's the code:

import webbrowser, os, sys
from threading import Thread
from BaseHTTPServer import HTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler

class HelpHTTPRequestHandler(SimpleHTTPRequestHandler):
    def do_GET(self):
        print "PATH: ", self.path
        if self.path.endswith("quit.html"):
            print "Exiting..."
            sys.exit(0)
        else:
            return SimpleHTTPRequestHandler.do_GET(self)

def help(base_dir, server_class=HTTPServer,
handler_class=HelpHTTPRequestHandler):
    os.chdir(base_dir)
    server_address = ('', 8000)
    httpd = server_class(server_address, handler_class)
    server_thread = Thread(target=httpd.serve_forever)
    server_thread.start()

    webbrowser.open("http://localhost:8000/index.html")

    print "Hit CTRL-Break or CTRL-C to exit server"

def main():
    current_dir = os.path.split(sys.argv[0])[0]
    help(current_dir)

if __name__ == "__main__":
    main()



From eric_brunel at despammed.com  Tue Nov 14 09:30:35 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 14 Nov 2006 15:30:35 +0100
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
	<op.tiyra9e4rqur0o@eb.pragmadev>
	<1163506422.556251.12250@h54g2000cwb.googlegroups.com>
Message-ID: <op.ti0fw9nlrqur0o@eb.pragmadev>

On Tue, 14 Nov 2006 13:13:42 +0100, rodmc <userprogoogle-139 at yahoo.co.uk>  
wrote:

>> >
>> > Traceback (most recent call last):
>> >   File "C:\Python24\Lib\site-packages\Fnorb\script\cpp.py", line 53,  
>> in
>> > -toplevel-
>> >     raise "No C/C++ pre-processor found in your PATH!"
>> > No C/C++ pre-processor found in your PATH!
>>
>> You don't say *when* this error occurs, i.e. what is the command that
>> returns the exception. Assuming it's when you try to compile an IDL file
>> with fnidl, just try:
>> fnidl --internal-cpp ...
>
> Sorry you are right I did not say, but you guessed correctly. However
> even when I try your advice I still receive the same error.

I took a look at the Fnorb sources and it appears you're right: even if  
the --internal-cpp flag is used, fnidl still tests if the MS compiler  
exists and breaks if it can't be called or if it doesn't return what fnidl  
expects. The actual test is whether the cl output contains the string  
"/link", whatever the character case. So as you said in your original post  
that cl can be run, but doesn't print anything, this seems to be the  
problem.

What you can do is the following: go to Fnorb's source directory and edit  
scripts/cpp.py; on line 53, replace the "raise ..." by:
COMMAND = None
with the same indent.

Then run fnidl again with the --internal-cpp flag. This should work and  
produce the expected files.

Note that this is a dirty hack: if you forget to specify the  
--internal-cpp flag, you'll get a nasty traceback. But it should work in  
your case.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From antoine at vo.lu  Mon Nov  6 11:32:52 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Mon, 06 Nov 2006 17:32:52 +0100
Subject: shutil: permission denied errors on windows
Message-ID: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>

Google tells quite some things about it, but none of them are satisfactory.

I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13] 
Permission denied all the time, for the source files. It seems that this 
is the case for all my files. But what I don't understand is that 
yesterday it still worked. I didn't change anything on my system though 
(at least not that I am aware of). I restarted the computer several 
times to see if that helped, but it didn't. Also I can't find a process 
that would be using the files...

Has anybody experienced this problem before, or have a solution?

Kind regards,
antoine

Here's the code that throws the errors

[...]
for l in files:
             from_file = os.path.join(dir, l)
             to_file = from_file.replace(tree_top, backup_dir)
             try:
                 if not os.path.exists(to_file):
                     log('Copying new      %s' % from_file)
                     counter_new += 1
                     shutil.copy2(from_file, to_file)
                 elif int(os.path.getmtime(from_file)) > 
int(os.path.getmtime(to_file)):
                     log('Copying modified %s' % from_file)
                     counter_mod += 1
                     shutil.copy2(from_file, to_file)
                 elif os.path.getsize(from_file) > os.path.getsize(to_file):
                     log('Sizes differ, but not rest: Copying %s' % 
from_file)
                     counter_special += 1
                     shutil.copy2(from_file, to_file)
                 elif os.path.getsize(from_file) < os.path.getsize(to_file):
                     log('Orig file smaller than backup file: Copying 
%s' % from_file)
                     counter_special += 1
                     shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
                     shutil.copy2(from_file, to_file)
                 else:
                     #log('not treated: %s' % l)
                     pass

             except (OSError, IOError), e:
                 not_accessible += 1
                 print e
[...]


From no-spam at no-spam-no-spam.invalid  Thu Nov  9 14:31:33 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 09 Nov 2006 20:31:33 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1163007675.919803.158010@m7g2000cwm.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1163007675.919803.158010@m7g2000cwm.googlegroups.com>
Message-ID: <eivvmn$vdd$1@news.albasani.net>

sturlamolden wrote:
> robert wrote:
> 
>> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
> 
> Threading is not the best way to exploit multiprocessors in this
> context. Threads are not the preferred way of exploiting multiple
> processors in scientific computing.


You repeat on the simple bulk jobs in sci computing where a file batch interface is enough:
Process X works on input file Y and writes output to file Z. A manager script collects the results and creates a gnuplot diagramm.
Such things of course would not raise the question of this discussion. Not even the question of threads at all and MPI ...

-robert


From deets at nospam.web.de  Sun Nov 26 17:22:50 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Nov 2006 23:22:50 +0100
Subject: Generating header information using ElementTree
In-Reply-To: <1164579522.671325.36260@14g2000cws.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
Message-ID: <4suidqF10rlh1U1@mid.uni-berlin.de>

Craig schrieb:
> Fredrik Lundh wrote:
> 
>> Craig wrote:
>>
>>> I'm only new to Python so please bear with me.  I using ElementTree to
>>> generate an XML file that will reference a DTD and an XSL file.  The
>>> header information I want at the start of the file is as follows:
>>>
>>> <?xml version="1.0"?>
>>> <?xml-stylesheet type="text/xsl" href="test.xsl"?>
>>> <!DOCTYPE BobActivityLog SYSTEM "test.dtd">
>>>
>>> How do you add this header information to the tree
>> to the file, you mean?  use print.
>>
>> </F>
> 
> Thanks for the quick response.  Here is the code I am using to manually
> write to the file is:
> 
>     outFile = open("record.xml", 'w')
>     outFile.write = ("<?xml version=\"1.0\"?>\n")
>     outFile.write = ("<?xml-stylesheet type=\"text/xsl\"
> href=\"test.xsl\"?>\n")
>     outFile.write = ("<!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n")
>     outFile.close()
> 
> When I run the code I get the following error message:
> 
> Traceback (most recent call last):
>   File "bob-xml.py", line 189, in <module>
>     main()
>   File "bob-xml.py", line 173, in main
>     outFile.write = ("<?xml version=\"1.0\"?>\n")
> AttributeError: 'file' object attribute 'write' is read-only
> 
> What am I doing wrong here?  If anyone could help that would be
> appreciated.  Thanks again.

write is a method, not a property.

outFile.write("whatever")

is the way to go...

Diez


From eric_brunel at despammed.com  Fri Nov 10 03:26:14 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 10 Nov 2006 09:26:14 +0100
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<slrnel6vs2.17k.wojciech_mula@cat.tac>
	<1163106111.916021.103880@b28g2000cwb.googlegroups.com>
Message-ID: <op.tiskd0perqur0o@eb.pragmadev>

On Thu, 09 Nov 2006 22:01:51 +0100, Dan Lenski <dlenski at gmail.com> wrote:
> Tk 8.4 appears to use native Win32 widgets under Cygwin and native
> WinXP.

It seems to depend on the widget type, and on what you call native... For  
example, tk menus are definitely the native ones; tk scrollbars are the  
native ones, but with the Win2k look (no XP look available yet); tk  
buttons do not seem to be the native ones, as they don't act like "normal"  
Windows buttons.

> But it definitely doesn't use GTK widgets under Ubuntu with
> Gnome desktop.

You seem to imply that GTK is "native" on Linux. It isn't, as can be seen  
with the echoes of the "holy war" between Gnome and KDE that we often see  
around here. As an aside, I personnally work on Linux and don't even use  
any of these environments (both are too much Windows-like to my taste...).

> Is there a way to get it to do so?

Not yet. But tcl/tk 8.5 will include the Tile extension including new  
themable widgets. See here:
http://tktable.sourceforge.net/tile/screenshots/unix.html

There is also a Tile/QT extension that allows the Tile widgets to use the  
QT library. See here:
http://www.ellogon.org/petasis/index.php?option=com_content&task=view&id=24&Itemid=40

AFAIK, nothing equivalent for GTK yet.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From tuomas.vesterinen at pp.inet.fi  Sun Nov  5 13:00:30 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Sun, 05 Nov 2006 18:00:30 GMT
Subject: forwarding *arg parameter
In-Reply-To: <aop3h.180$7b6.55@read3.inet.fi>
References: <6pn3h.125$7b6.98@read3.inet.fi>
	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>
	<aop3h.180$7b6.55@read3.inet.fi>
Message-ID: <2Fp3h.195$7b6.100@read3.inet.fi>

Tuomas wrote:
> def g(*arg):
>     return arg
> 
> def f(*arg):
>     return g(arg)
> 
> How can g know if it is called directly with (('foo', 'bar'),) or via f 
> with ('foo', 'bar'). I coud write in f: return g(arg[0], arg[1]) if I 
> know the number of arguments, but what if I don't know that in design time?

So it seems that I would like to have an unpack operator:

def f(*arg):
     return(!*arg)

TV


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Nov 21 18:40:22 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 22 Nov 2006 00:40:22 +0100
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
Message-ID: <4shh33FvipdtU1@mid.individual.net>

flamesrock wrote:

> always true? Seems it should be false, since the statement itself
> occurs at one time instant.. but of course we know that python
> doesn't execute code that way..

C++ also wouldn't. How could multiple object instantiations be
atomic?

Regards,


Bj?rn

-- 
BOFH excuse #42:

spaghetti cable cause packet failure



From gregpinero at gmail.com  Thu Nov 16 14:08:29 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Thu, 16 Nov 2006 14:08:29 -0500
Subject: Heap Memory
In-Reply-To: <ejia35$cfk$1@sea.gmane.org>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
	<ejia35$cfk$1@sea.gmane.org>
Message-ID: <312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>

On 11/16/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> what are you guys talking about?  there are no artificial memory
> limitations in Python; a Python process simply uses all the memory it
> can get from the operating system.

I wish I could easily reproduce one of these errors I'm thinking of.
The last time it happened to me, I was pulling about 400,000 records
(10 fields) out of a database table and putting it into a list of
lists.  I then attempted to pickle the resulting huge list to disk and
I just got a big MemoryError.  A similiar thing happened when trying
to write the list to disk using the csv module.

This computer it was running on has 2GB of RAM and 6GB of virtual
memory so I really doubt I had used up all of that memory.  I didn't
watch it the whole time so I can't be sure though.  Any ideas what
could have been going on there?

-Greg


From christian at dowski.com  Wed Nov 29 08:37:46 2006
From: christian at dowski.com (Christian)
Date: 29 Nov 2006 05:37:46 -0800
Subject: ANN: CherryPy 3.0 RC1
References: <d66b7a7f0611280608xc4b2f3bq954ca90ac9f54e54__27942.1564926908$1164736074$gmane$org@mail.gmail.com>
	<mailman.817.1164755063.32031.python-list@python.org>
Message-ID: <1164807466.342293.138760@h54g2000cwb.googlegroups.com>

> "Christian Wyglendowski" <christian at dowski.com> writes:
>
> > I'm happy to announce the first release candidate for CherryPy 3.0.

Ben Finney wrote:
>
> Congratulations, I'm glad to see an announcement for CherryPy.
>
> Please, in future, don't send HTML message bodies to public forums;
> plain text is far better for such a wide audience.

My apologies.  I wrongly assumed that anyone using an email client that
only supported plain text would simply use the plain text part of the
email.  Thanks for bringing this to my attention.

Christian
http://www.dowski.com



From rrr at ronadam.com  Sat Nov 11 16:36:43 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 11 Nov 2006 15:36:43 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej5e69$j1q$1@news.albasani.net>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net>
Message-ID: <ej5g0e$1jp$1@sea.gmane.org>

Georg Brandl wrote:
> Ron Adam wrote:
>> Georg Brandl wrote:
>>> Ron Adam wrote:
>>>> Michael Hobbs wrote:
>>>>
>>>>> The same problem that is solved by not having to type parens around the 
>>>>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>>>>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>>>>> months and got very comfortable with just typing the if conditional and 
>>>>> hitting return, without any extra syntax. When I came back to Python, I 
>>>>> found that I felt annoyed every time I typed the colon, since it 
>>>>> obviously isn't required. The FAQ says that the colon increases 
>>>>> readability, but I'm skeptical. The indentation seems to provide more 
>>>>> than enough of a visual clue as to where the if conditional ends.
>>>> I'm not sure why '\'s are required to do multi-line before the colon.
>>> Special cases aren't special enough to break the rules.
>>>
>>> Georg
>> A bit of a circular answer.
>>
>>      Why the rule? -> So not to break the rule?
> 
> You proposed to allow leaving off line continuation '\' only in the
> "if", "for" and "while" headers. This is a special case in my eyes.

I wasn't that specific and it was related to Michael's suggestion the colon 
wasn't needed. If the need for '\' was dropped in multi-line block headers, then 
the colon would be required for an obvious reason.

If the requirement for line continuations was omitted for "any" block header 
starting with a python keyword and ending with a colon, would it still be a 
special case?  It would be a bit less explicit.  Are there situations where you 
would want to explicitly limit a block header to just a single line because of 
some negative consequence?

I'm asking more for just plain curiosity, and not suggesting this actually be 
changed.  In practice I don't think its enough of a issue to warrant changing in 
python 2.x.  Although it just may (coin toss here) be beneficial for python 3k 
if extended annotations are implemented.

    Ron


>> I would guess this probably is more applicable in this case.
>>
>>      Explicit is better than implicit.
> 
> Of course, this always applies :)
> 
> Georg



From steve at holdenweb.com  Fri Nov 10 13:36:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 12:36:34 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4554AAB4.10002@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
Message-ID: <ej2gp9$1qc$1@sea.gmane.org>

Michael Hobbs wrote:
> Ben Finney wrote:
[...]
>> A use case. What problem is being solved by introducing this
>> inconsistency?
>>   
> The same problem that is solved by not having to type parens around the 
> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
> typing to no good advantage, IMHO. I was coding in Ruby for several 
> months and got very comfortable with just typing the if conditional and 
> hitting return, without any extra syntax. When I came back to Python, I 
> found that I felt annoyed every time I typed the colon, since it 
> obviously isn't required. The FAQ says that the colon increases 
> readability, but I'm skeptical. The indentation seems to provide more 
> than enough of a visual clue as to where the if conditional ends.
> 
So you'd also like us to shorten the names of the builtins and the the 
keywords? Why bother with "def" when we could just use "d", "class" when 
we could just use "c"? Or *does* readability matter to some degree?

> As far as using the FAQ as gospel, the FAQ also provides arguments for 
> why there isn't a with statement or a switch statement. The with 
> statement has already been implemented in 2.5 and there's a PEP to 
> implement switch (3103).
> 
But the "with" statement isn't the one that "with" was reserved for in 
the FAQ, which is really talking about the same kind of "with" statement 
that Visual Basic uses: an implied left operand for unary "." operations.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From mail at microcorp.co.za  Sat Nov 18 00:21:20 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 18 Nov 2006 07:21:20 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au><ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<001501c70a50$440b4840$03000080@hendrik>
Message-ID: <007101c70ae0$b876e460$03000080@hendrik>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote - 5 times - must be record for
stupidity...

sorry about this - the message was stuck in my outbox for some reason, and I hit
the send key multiple times, not noticing that it was in fact being sent...

- Hendrik



From justask at acme.com  Mon Nov 27 18:23:01 2006
From: justask at acme.com (Vincent Delporte)
Date: Tue, 28 Nov 2006 00:23:01 +0100
Subject: "fork and exit" needed?
Message-ID: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>

Hi

	I'm a Python newbie, and would like to rewrite this Perl scrip
to be run with the Asterisk PBX:

http://www.voip-info.org/wiki/view/Asterisk+NetCID

Anyone knows if those lines are necessary, why, and what their
alternative is in Python?

-------
open STDOUT, '>/dev/null'; 
fork and exit;
-------

Thank you.


From erikwickstrom at gmail.com  Fri Nov  3 16:35:05 2006
From: erikwickstrom at gmail.com (erikcw)
Date: 3 Nov 2006 13:35:05 -0800
Subject: Having trouble with file modes
In-Reply-To: <1162587613.376486.298340@h54g2000cwb.googlegroups.com>
References: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>
	<1162587613.376486.298340@h54g2000cwb.googlegroups.com>
Message-ID: <1162589705.515424.288140@b28g2000cwb.googlegroups.com>

To make it write over the data, I ended up adding, which seems to work
fine.

f = open('_i_defines.php', 'w+')
data = f.read()
f.seek(0)
f.truncate(0)
...process data, write file, close...

Now that I look at it, I could probably take out the f.seek().

Thanks for your help!


On Nov 3, 4:00 pm, "martdi" <martin.d... at gmail.com> wrote:
> > At first I was convinced that "w+" was the tool for the job.  But now
> > I'm finding that the contents of the file are deleted (so I can't read
> > the data in).Possible File Modes:
> a : Append -- Add data at the end of the file
> r : Read -- Read from the file
> w : write -- Flush contents of the file and put data in it
> r+ : read and write -- Make changes to the file
> any of the above modes with b added at the end of the mode sets the
> file in binary mode
>
> you might want to check section 7.2 fromhttp://docs.python.org/tut/node9.html
>
> Ofen when doing file operations you might prefer to read the file to
> modify, make changes in memory then save back in an other file, so you
> can make sure the changes are ok before you replace the old one



From johnjsal at gmail.com  Thu Nov  2 10:15:49 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 07:15:49 -0800
Subject: creating new objects with references to them
Message-ID: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>

It seems like what I want to do is something that programmers deal with
everyday, but I just can't think of a way to do it. Basically, I am
writing a DB front-end and I want a new "Researcher" object to be
created whenever the user presses the "New Record" button. He can open
as many new records at a time as he wants and fill in the information.

What I don't know how to do is handle this arbitrary number of objects.
When it comes time to save the data to the DB, how do I access each
object (to get the text fields associated with each)? Won't I have to
have given each instance some name? Or is there some other way to do
this? Simply creating a new instance each time the user presses "New
Record" won't be good enough, because how do I retain a reference to
that instance over the course of the program, even after a second or
third instance has been created?

Hope that makes sense. It seems like such a common task.

Thanks.



From kadeko at gmail.com  Tue Nov 14 06:16:24 2006
From: kadeko at gmail.com (looping)
Date: 14 Nov 2006 03:16:24 -0800
Subject: Using ctypes with Windows API to get FileVersion of a file
Message-ID: <1163502984.386454.159040@h54g2000cwb.googlegroups.com>

Hi,
I need to get the FileVersion of some files on Windows. The best way
look like to use function GetFileVersionInfo from the Windows API. I
first try with pywin32 and it work well, but with ctypes now included
in Python 2.5, use it look like a good idea.
So I write the code below that work fine, but I'm not sure it's the
best way to do what I want.
My main concern is about the codepages extraction: could I use a struct
to make the job ?
Codepages is actually an array of struct, how could I use ctypes to
extract it ?

Thanks for your comments and advices.

import array
from ctypes import *

def get_file_info(filename, info):
    """
    Extract information from a file.
    """
    # Get size needed for buffer (0 if no info)
    size = windll.version.GetFileVersionInfoSizeA(filename, None)
    # If no info in file -> empty string
    if not size:
        return ''
    # Create buffer
    res = create_string_buffer(size)
    # Load file informations into buffer res
    windll.version.GetFileVersionInfoA(filename, None, size, res)
    r = c_uint()
    l = c_uint()
    # Look for codepages
    windll.version.VerQueryValueA(res, '\\VarFileInfo\\Translation',
                                  byref(r), byref(l))
    # If no codepage -> empty string
    if not l.value:
        return ''
    # Take the first codepage (what else ?)
    codepages = array.array('H', string_at(r.value, l.value))
    codepage = tuple(codepages[:2].tolist())
    # Extract information
    windll.version.VerQueryValueA(res, ('\\StringFileInfo\\%04x%04x\\'
+ info) % codepage,
                                        byref(r), byref(l))
    return string_at(r.value, l.value)
    
print get_file_info(r'C:\WINDOWS\system32\calc.exe', 'FileVersion')



From gagsl-py at yahoo.com.ar  Wed Nov 15 18:52:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 20:52:27 -0300
Subject: pyRTF and Footers
In-Reply-To: <1163632090.351315.19480@h48g2000cwc.googlegroups.com>
References: <1163632090.351315.19480@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061115203548.0406ecd0@yahoo.com.ar>

At Wednesday 15/11/2006 20:08, E.Doxtator at gmail.com wrote:

>I've been using the pyRTF module to generate some documents that I need
>for work.  In general, the module is good, and pretty simple to use.
>However, I am running into a problem with footers that doesn't quite
>make sense to me.

First, I don't use pyRTF. The app sketch and code snippet you have 
posted look reasonable.
At least using Word, you can configure a page footer for each section 
in the document, so I think it should be posible.
If you don't get the output you want, it may be a bug in the module, 
you are using it in the wrong way, the feature is unsupported, etc. 
but most likely not a bug in Python itself. So a better place to ask 
would be... well, it appears there is no better place except asking 
the author directly :)

(BTW, thanks for pointing me towards pyRTF - it may be useful, so 
I'll give it a try...)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ratbasher at gmail.com  Wed Nov 22 21:22:09 2006
From: ratbasher at gmail.com (Exod)
Date: 22 Nov 2006 18:22:09 -0800
Subject: Tkinter, main loop question.
Message-ID: <1164248529.501106.255990@e3g2000cwe.googlegroups.com>

Don't know if its possible in this light-weight GUI toolset, but can i
somehow hook up into the mainloop in it, for example if i were to
create an internet application, i would need to keep recieving data
from within it?



From mike.klaas at gmail.com  Tue Nov 28 14:11:56 2006
From: mike.klaas at gmail.com (Klaas)
Date: 28 Nov 2006 11:11:56 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <1164739788.335821.239100@n67g2000cwd.googlegroups.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
	<mailman.801.1164715357.32031.python-list@python.org>
	<1164739788.335821.239100@n67g2000cwd.googlegroups.com>
Message-ID: <1164741116.583861.278220@l12g2000cwl.googlegroups.com>

John Machin wrote:

> Thanks, that's indeed faster than array(t, [v]*n) but what I had in
> mind was something like an additional constructor:
>
> array.filledarray(typecode, repeat_value, repeat_count)
>
> which I speculate should be even faster. Looks like I'd better get a
> copy of arraymodule.c and start fiddling.
>
> Anyone who could use this? Suggestions on name? Argument order?
>
> Functionality: same as array.array(typecode, [repeat_value]) *
> repeat_count. So it would cope with array.filledarray('c', "foo", 10)

Why not just optimize array.__mul__?  The difference is clearly in the
repeated memcpy() in arraymodule.c:683.  Pseudo-unrolling the loop in
python demonstrates a speed up:

[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c',['\0'])*100000"
100 loops, best of 3: 3.14 msec per loop
[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c',['\0','\0','\0','\0'])*25000"
1000 loops, best of 3: 732 usec per loop
[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c','\0'*20)*5000"10000 loops, best of 3: 148 usec per loop

Which is quite close to your fromstring solution:

[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c').fromstring('\0'*100000)"
10000 loops, best of 3: 137 usec per loop

In fact, you can make it about 4x faster by balancing:

[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c','\0'*200)*500"
10000 loops, best of 3: 32.4 usec per loop

For the record:

[klaas at worbo ~]$ python -m timeit -s "from array import array"
"array('c','\0'*100000)"
10000 loops, best of 3: 140 usec per loop

-Mike



From ocollioud at gmail.com  Thu Nov 16 01:45:30 2006
From: ocollioud at gmail.com (olive)
Date: 15 Nov 2006 22:45:30 -0800
Subject: Yield
In-Reply-To: <455b4f9f$1@usenet01.boi.hp.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
Message-ID: <1163659530.752607.120880@m73g2000cwd.googlegroups.com>


dwelch91 a ?crit :
> http://docs.python.org/ref/yield.html

This is a perfect example that demonstrate how the actual python is bad
and most of the time useless (at least for me).

We really need mor example !

I would like to thanks Fredrik for his contribution to improve that.

Olivier.



From rvernica at gmail.com  Fri Nov 17 18:39:19 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 15:39:19 -0800
Subject: remove a list from a list
In-Reply-To: <slrnels90n.16o.horpner@FIAD06.norwich.edu>
References: <ejkv1u$ajf$1@sea.gmane.org>
	<455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>
	<455E0A20.9000509@tim.thechases.com>	<ejl2re$ns3$1@sea.gmane.org>
	<455E100D.8030100@tim.thechases.com>	<mailman.374.1163793666.32031.python-list@python.org>
	<slrnels90n.16o.horpner@FIAD06.norwich.edu>
Message-ID: <ejlh6u$4r1$1@sea.gmane.org>

The problem with skipping over them is that "walk" would still walk them 
and their content. If they have a lot of other dirs and files inside 
then this might end up being time consuming.

Thanks,
Ray

Neil Cerutti wrote:
> On 2006-11-17, Rares Vernica <rvernica at gmail.com> wrote:
>> Sorry for not being clear from the beginning and for not using
>> clear variable names.
>>
>> Problem context:
>>
>> import os
>> dirs_exclude = set(('a', 'b', 'e'))
>> for root, dirs, files in os.walk('python/Lib/email'):
>>      # Task:
>>      # delete from "dirs" the directory names from "dirs_exclude"
>>      # case-insensitive
>>
>> The solution so far is:
>>
>> for i in xrange(len(dirs), 0, -1):
>>    if dirs[i-1].lower() in dirs_exclude:
>>      del dirs[i-1]
>>
>> I am looking for a nicer solution.
> 
> I'd probably just skip over those dirs as I came them instead of
> troubling about mutating the list. Unless the list is needed in
> more than one place.
> 



From sjmachin at lexicon.net  Sat Nov 25 14:11:34 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 11:11:34 -0800
Subject: Return float problem.
References: <1164467735.644775.289030@m7g2000cwm.googlegroups.com>
Message-ID: <1164481894.887091.196160@l39g2000cwd.googlegroups.com>

YunBin Lee wrote:
> Hi, all.
> I have a problem of float return error in python c binding module.
> Below is my c sources, compile commands and result of program.

There seems to be a missing file: example.h. If that hint isn't
sufficient, please continue reading.

>
> ========== wrap.c =========
> #include <Python.h>
>
> PyObject *wrap_fact(PyObject *self, PyObject *args)
> {
> double n=0.0,result=0.0;
>     if (!PyArg_ParseTuple (args,"d:fact",&n))
>         return NULL;
>     result = fact(n);
>     result = fact(result);
>     return Py_BuildValue("d",result);
> }
>
> PyObject *wrap_test(PyObject *self, PyObject *args)
> {
> double value = 0.124;
>     return Py_BuildValue ("d", value);
> }
>
> static PyMethodDef exampleMethods[] =
> {
>     {"fact", wrap_fact, METH_VARARGS, "Simple return a float"},
>     {"test", wrap_test, METH_VARARGS, "Test"},
>     {NULL,NULL}
> };
>
> void initexample()
> {
>     PyObject *m;
>     m = Py_InitModule ("example", exampleMethods);
> }
> ========== end wrap.c =========
>
> ========== example.c =========
> #include <stdio.h>
>
> double fact(double n)
> {
>     printf ("n=%f\n",n);
>     return n;
> }
>
> int main(int argc,char *argv[])
> {
>     printf ("%f\n",fact(0.1234));
> }
> ========== end example.c =========
>
> complied with commands:
> lyb at ubuntu:~$ gcc -fpic -c -I. -I.. -I/usr/include/python2.4/ example.c
> wrap.c

Didn't this produce any warning messages, like:

wrap.c:8: warning: implicit declaration of function `fact'

?

> lyb at ubuntu:~$ gcc -shared -o example.so example.o wrap.o
>
> then i used the example.so with command:
> lyb at ubuntu:~$ python -c "import example; print example.fact(0.444)"
> n=0.444000
> n=-103079215.000000 <-- Why not is 0.444?
> -1140850688.0 <--- Why not is 0.444?

Did you notice that the garbage is a whole number? Why? Because you
have been (more or less) plucking ints out of some arbitrary place on
the stack, floating them, and printing them.

HTH,
John



From bill_maxwell_notMyRealAddress at notreal.net  Wed Nov 29 23:44:45 2006
From: bill_maxwell_notMyRealAddress at notreal.net (Bill Maxwell)
Date: Wed, 29 Nov 2006 23:44:45 -0500
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <q1osm2pavs26to412qjodn41g3bcsjilvt@4ax.com>

On 16 Nov 2006 13:09:03 -0800, "sturlamolden" <sturlamolden at yahoo.no>
wrote:

...SNIP...

>To compare Matlab with NumPy we can e.g. use the D4 discrete wavelet
>transform. I have here coded it in Matlab and Python/NumPy using Tim
>Swelden's lifting scheme.
>
>First the Matlab version (D4_Transform.m):
>
>function x = D4_Transform(x)
>   % D4 Wavelet transform in Matlab
>   % (C) Sturla Molden
>   C1 =  1.7320508075688772;
>   C2 =  0.4330127018922193;
>   C3 = -0.066987298107780702;
>   C4 =  0.51763809020504137;
>   C5 =  1.9318516525781364;
>   s1 = zeros(ceil(size(x)/2));
>   d1 = zeros(ceil(size(x)/2));
>   d2 = zeros(ceil(size(x)/2));
>   odd = x(2:2:end);
>   even = x(1:2:end-1);
>   d1(:) = odd - C2*even;
>   s1(1) = even(1) + C2*d1(1) + C3*d1(end);
>   s1(2:end) = even(2:end) + C2*d1(2:end) + C3*d1(1:end-1);
>   d2(1) = d1(1) + s1(end);
>   d2(2:end) = d1(2:end) + s1(1:end-1);
>   x(1:2:end-1) = C4*s1;
>   x(2:2:end) = C5*d2;
>   if (length(x) >2)
>      x(1:2:end-1) = D4_Transform(x(1:2:end-1));
>   end
>
>
>Then the Python version (D4.py):
>
>import numpy
>import time
>
>def D4_Transform(x, s1=None, d1=None, d2=None):
>   """
>   D4 Wavelet transform in NumPy
>   (C) Sturla Molden
>   """
>   C1 = 1.7320508075688772
>   C2 = 0.4330127018922193
>   C3 = -0.066987298107780702
>   C4 = 0.51763809020504137
>   C5 = 1.9318516525781364
>   if d1 == None:
>      d1 = numpy.zeros(x.size/2)
>      s1 = numpy.zeros(x.size/2)
>      d2 = numpy.zeros(x.size/2)
>   odd = x[1::2]
>   even = x[:-1:2]
>   d1[:] = odd[:] - C1*even[:]
>   s1[0] = even[0] + C2*d1[0] + C3*d1[-1]
>   s1[1:] = even[1:] + C2*d1[1:] + C3*d1[:-1]
>   d2[0] = d1[0] + s1[-1]
>   d2[1:] = d1[1:] + s1[:-1]
>   even[:] = C4 * s1[:]
>   odd[:] = C5 * d2[:]
>   if x.size > 2:
>
>D4_Transform(even,s1[0:even.size/2],d1[0:even.size/2],d2[0:even.size/2])
>
>if __name__ == "__main__":
>   x = numpy.random.rand(2**23)
>   t0 = time.clock()
>   D4_Transform(x)
>   t = time.clock()
>   print "Elapsed time is %.6f seconds" % (t-t0)
>
...SNIP...


I couldn't help but notice that the following two lines from the above
code are doing different things, but I think they are supposed to do the
same things (the first is the Matlab version, the 2nd is the Python
version):


>   d1(:) = odd - C2*even;

>   d1[:] = odd[:] - C1*even[:]


I don't understand what this code is doing, so I don't know which is
wrong.  I don't even know if this is the actual code you are using. Just
thought I'd mention it.


Bill




From paddy3118 at netscape.net  Wed Nov 15 01:58:19 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Nov 2006 22:58:19 -0800
Subject: multi split function taking delimiter list
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
	<1163541478.391883.227320@e3g2000cwe.googlegroups.com>
Message-ID: <1163573899.153057.242510@f16g2000cwb.googlegroups.com>


Paddy wrote:

> martinskou at gmail.com wrote:
>
> > Hi, I'm looking for something like:
> >
> > multi_split( 'a:=b+c' , [':=','+'] )
> >
> > returning:
> > ['a', ':=', 'b', '+', 'c']
> >
> > whats the python way to achieve this, preferably without regexp?
> >
> > Thanks.
> >
> > Martin
>
> I resisted my urge to use a regexp and came up with this:
>
> >>> from itertools import groupby
> >>> s = 'apple=blue+cart'
> >>> [''.join(g) for k,g in groupby(s, lambda x: x in '=+')]
> ['apple', '=', 'blue', '+', 'cart']
> >>>
>
> For me, the regexp solution would have been clearer, but I need to
> stretch my itertools skills.
> 
> - Paddy.
Arghhh!
No colon!
Forget the above please.

- Pad.



From mail at razor.dk  Sun Nov  5 08:05:53 2006
From: mail at razor.dk (Christian Joergensen)
Date: Sun, 05 Nov 2006 14:05:53 +0100
Subject: finding the list of the matched strings
References: <1162731282.327715.49800@f16g2000cwb.googlegroups.com>
Message-ID: <87ejsigi1a.fsf@jamie.razor.dk>

"jm.suresh at no.spam.gmail.com" <jm.suresh at gmail.com> writes:

> Hi, I have a list of strings. And I want to find the subset which
> matches a particular regular expression.
>
> import re
> ll = ('a', 'b', 's1', 's2', '3s')
> p = re.compile('^s.*')
> newList = filter(lambda s: p.match(s), ll)
>
> I suppose there should be simple function to do this in re module. Is
> there any?
>
> I searched google, but could not find one, may be for keywords were not
> perfect.

I dont believe there exists such a function. I would have written
it using a list comprehension.

>>> import re
>>> ll = ('a', 'b', 's1', 's2', '3s')
>>> p = re.compile('^s.*')
>>> newList = [s for s in ll if p.match(s)]
>>> newList
['s1', 's2']

-- 
Christian Joergensen | Linux, programming or web consultancy
http://www.razor.dk  |     Visit us at: http://www.gmta.info


From kw at kevin-walzer.com  Fri Nov  3 11:26:28 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Fri, 03 Nov 2006 11:26:28 -0500
Subject: setting up wxPython on a Mac
In-Reply-To: <mailman.1719.1162571053.11739.python-list@python.org>
References: <mailman.1719.1162571053.11739.python-list@python.org>
Message-ID: <454B6DB4.4040107@kevin-walzer.com>

Brian Blais wrote:
> Hello,
> 
> I have a wxPython program that I would like to give to a friend of mine
> who has a Mac.  Is there a resource out there that can tell me what
> steps I need to follow to do this?  Under windows, I would just install
> Enthought, and it would work without any modifications.  I don't know
> Macs all that well, but is there something similar?
> 
> Thanks,
> 
> 
>             Brian Blais
> 
Install Python from the Python website--a Python 2.5 installer is
available for the Mac.

Install wxPython from the wxPython website--an installer for the latest
version of wxPython for the Mac is also available.

That should do it.

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


From moonbee5555555555 at yahoo.com  Thu Nov 30 16:05:23 2006
From: moonbee5555555555 at yahoo.com (Boneh)
Date: 30 Nov 2006 13:05:23 -0800
Subject: How can I change the icon
In-Reply-To: <1164920447.562855.159040@h54g2000cwb.googlegroups.com>
References: <1164920447.562855.159040@h54g2000cwb.googlegroups.com>
Message-ID: <1164920723.810868.8320@l12g2000cwl.googlegroups.com>


Boneh wrote:
> Is it possible to change the icon "Tk" of the windows popped up ?

I am using tkinter for widgets, thanks :-)



From paul at boddie.org.uk  Thu Nov  2 10:33:46 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 2 Nov 2006 07:33:46 -0800
Subject: Python in sci/tech applications
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
Message-ID: <1162481626.685213.130410@m73g2000cwd.googlegroups.com>

mattf wrote:
> I'd like to mention a few things I've run across that have either surprised me or kept me
> from doing things the way I'd like to.
>
> 1) -There's a large and active sci/tech Python community out there.-
> This was something of a surprise. If you look at the python.org site
> and click down a couple of levels past the front page, there's a rather
> brief mention of scientific and numeric applications-- but I don't
> think this does justice to the current levels of activity and
> accomplishment.

If you want an in-depth impression of how widely Python is used,
python.org is not really the place that manages to provide it. Sure,
"NASA uses Python" (appropriate response: dressed in a flight suit,
leap up and punch the air?) but isn't OLPC (One Laptop per Child:
http://www.laptop.org/) worth a mention, given the central role of
Python in a device that will potentially reach millions? To the site's
credit, the link to scientific and numeric applications does yield a
lot of information, and I suppose it's hard to focus the site on any
one thing that any given group considers of utmost importance.

However, I think you're going to find that the python.org worldview can
be somewhat alien, especially if your primary interest isn't Python
(the language). To take another domain as an example, if you do desktop
development, the treatment of graphical user interface programming on
the site is quite possibly going to be completely disaligned with what
you'd expect: Python is used extensively in various desktop
environments (not that you'd get that impression from a cursory
examination of python.org), but the python.org (or comp.lang.python)
worldview mostly excludes such things as if the desktop is something
you abstract away rather than take advantage of.

And on the subject of how well "core Pythoneers" know of Python's
successes: how many people knew that Python was used in the OLPC device
before Alan Kay mentioned it at EuroPython? It's hard to promote Python
when you don't know where it's being successfully used already.

> 2) -There's a very impressive set of libraries out there-
> NumPy, SciPy, Enthought. It's really kind of stunning how mature these
> libraries are and how much I had to poke around to figure that out.

I guess a lot of the poking around comes about because people are
reluctant to provide any semi-official guide to the best libraries, and
that the most promotion occurs for the most fashionable products in the
most fashionable domains. Some of us have tried to provide better
information about libraries for Python, but such details remain
relatively hidden in the python.org Wiki:

http://wiki.python.org/moin/UsefulModules

With respect to content on python.org, I think all that remains is an
acknowledgement that certain resources are never going to return to
their original vitality, and that alternative mechanisms for publishing
content are required. For example, the XML topic guide surely hasn't
seen many updates in a very long time, and despite a reasonable level
of maintenance, the database topic guide could surely be more actively
maintained by aggregating package information from the package index.

Paul



From fredrik at pythonware.com  Mon Nov 20 02:00:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 08:00:56 +0100
Subject: re.match -- not greedy?
In-Reply-To: <750FA239330A7E4CA15D456F37DFF8AE02500B03@XCH-AU-01.au.nos.boeing.com>
References: <750FA239330A7E4CA15D456F37DFF8AE02500B03@XCH-AU-01.au.nos.boeing.com>
Message-ID: <ejrjr9$mip$2@sea.gmane.org>

EXI-Andrews, Jack wrote:


>>>> import re;re.match('(a+)(ab)','aaab').groups()
> ('aa', 'ab')
> 
> this is the sort of behaviour i'd expect from 
>    '(a+?)(ab)'
> 
> a+ should greedily consume a's at the expense of the string
 > not matching

that's a misunderstanding of what a regular expression is, though: 
conceptually, a RE describes a set of strings, and the RE engine is 
designed to answer the question "does this string belong to this
set".

</F>



From rpdooling at gmail.com  Tue Nov 14 11:29:26 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 14 Nov 2006 08:29:26 -0800
Subject: another newbie question
In-Reply-To: <mailman.155.1163518906.32031.python-list@python.org>
References: <mailman.155.1163518906.32031.python-list@python.org>
Message-ID: <1163521766.738257.98520@h54g2000cwb.googlegroups.com>

Lots of smart, patient people here, but they can't help you until you
provide a lot more information and the actual error messages you are
getting and whether they are spawned by Python or MySQL, if that is
indeed the db you are using. Where did you get the idea that Python
might be involved?

Read this and it will serve you well for this inquiry and any others
you may have.

http://catb.org/esr/faqs/smart-questions.html

Good luck

rd

"Give a man a fire and keep him warm for a day. Light a man on fire
 and he will be warm for rest of his life." --Terry Pratchett



From inq1ltd at verizon.net  Fri Nov 24 13:01:05 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 24 Nov 2006 13:01:05 -0500
Subject: Access to variable from external imported module
In-Reply-To: <1164357005.703346.35320@45g2000cws.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.658.1164324057.32031.python-list@python.org>
	<1164357005.703346.35320@45g2000cws.googlegroups.com>
Message-ID: <200611241301.05557.inq1ltd@verizon.net>







On Friday 24 November 2006 03:30, John Machin 
wrote:
> jim-on-linux wrote:
> > GinTon,
> >
> > I think this is what you want.
> >
> >
> > class Kdoi:
>
> Is that a typo?
       No, it's a style. life seems to be easier  
to me if one is consistent, all my classes begin 
with K.
>
> >    def __init__(self) :
> >        self.Fdo()
>
> What is all this K and F stuff?
>
   It's my style. life seems to be easier  to me 
if one is consistent all my function begin with 
F.

I started doing things like this when the only way 
to debug was to read each line of code and try to 
figgure out if it was the problem.
They are my personal sign posts. 
> >    def Fdo(self):
> >

> >      searchterm = 'help'
> >      print searchterm     #local
> >
> >      self.searchterm = searchterm
> >      print self.searchterm #used inside the
> > class
> >
> >      Kdo.searchterm = searchterm   #<<<<
> >      print Kdo.searchterm #used outside the
> > class Kdomore()
> >
> >
> >
> > class Kdomore(Kdo):
> >      def __init__(self) :
> >          self.Fdomore()
> >
> >      def Fdomore(self):
> >          searchterm =  Kdo.searchterm   #
> > <<<< print searchterm
>
> It's not apparent what the print statements are
> for -- are they part of an attempt to debug
> your code?
>
print shows the results wherever a print statement 
turns up the results = 'help' .
I didn't run the code, and it has it has a coding 
error but if removed, the results should be; 

   searchterm = 'help'
   self.searchterm = 'help'
   Kdo.searchterm = 'help'

   Sound silly but many people have trouble with  
getting a variable from here to there in their 
code. This shows that it can be done

> What gives you the idea that this is what the
> OP wants or needs?

If I remember right,  he refrased  his first 
question and asked a second one. 
Sometimes people don't take the time to write 
correctly, the questions that are really in their 
mind. So I guessed.  If Im wrong, he will ignore 
it.  If I'm right, he will use it.  

Also, I have found that other will latch on to the 
ideas presented  in these email responses. And 
they will use them, even though the response was 
not exactly what the original emailer wanted.

And, I sometimes I do use print statements to 
debug, I have used other ways but on linux, I 
prefer a print statement.

jim-on-linux
http://www.inqvista.com 













From fredrik at pythonware.com  Thu Nov 23 10:51:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 16:51:18 +0100
Subject: ImportError: No module named getopt
References: <1164294464.445025.326640@f16g2000cwb.googlegroups.com><mailman.645.1164295394.32031.python-list@python.org>
	<1164296497.433163.226290@j72g2000cwa.googlegroups.com>
Message-ID: <ek4g1m$35q$1@sea.gmane.org>

"prashant" wrote:

> I am actually using Cygwin to run a python script.
> I have python 2.5 installed. But when i ran the command mentioned by
> you... I see that it is looking in the wrong directories... how can i
> change these look up directories?

is PYTHONHOME perhaps set to the wrong thing?

if not, you can point it to the root of your Python installation.  use "python -h"
for more alternatives.

</F> 





From vishpat at gmail.com  Tue Nov  7 23:25:04 2006
From: vishpat at gmail.com (Vishal Patil)
Date: Tue, 7 Nov 2006 23:25:04 -0500
Subject: Simple Python Based Genetic Algorithm Framework
Message-ID: <4745278c0611072025w2bbe0983jaa8eb59babf3e7b0@mail.gmail.com>

Check out a new and simple Python base genetic algorithm framework at
http://vishpat.googlepages.com/pgap

-- 
Motivation will almost always beat mere talent.


From spedrosa at gmail.com  Wed Nov 29 17:45:38 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 29 Nov 2006 14:45:38 -0800
Subject: Good script editor for Python on Mac OS 10.3
In-Reply-To: <pecora-F96D92.15371029112006@ra.nrl.navy.mil>
References: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>
	<pecora-F96D92.15371029112006@ra.nrl.navy.mil>
Message-ID: <1164837025.208136.208480@l39g2000cwd.googlegroups.com>


Lou Pecora escreveu:

> In article <1164830360.213197.182560 at l12g2000cwl.googlegroups.com>,
>  "Scott_Davies" <cloudrider9 at gmail.com> wrote:
>
> > Hi,
> >
> > I have an old Mac with OS X Panther installed.  I also have the Python
> > language download file, but I haven't got a text/script editor to use
> > for it.  Does anyone have a recommendation for a good Python text
> > editor in OS 10.3?
> >
> > Thanks,
> >
> > Scott D.
> >

I didn't see "free" in your post, so why not try TextMate?


Stephen



From python.list at tim.thechases.com  Thu Nov  2 08:58:20 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 02 Nov 2006 07:58:20 -0600
Subject: Make all files extension lower by a given directory name
In-Reply-To: <20061102044749.57630.qmail@web15006.mail.cnb.yahoo.com>
References: <20061102044749.57630.qmail@web15006.mail.cnb.yahoo.com>
Message-ID: <4549F97C.1060403@tim.thechases.com>

>> can you post an example of a filename that misbehaves on
>> your machine?
>> 
>> </F>
> 
> To Fredrik Lundh and Tim Chase:
> 
> My task was read all tga file names and generate a config xml
> file, then pass this xml file to a utility, but this utillity
> only read files with extension 'tga' than 'TGA'.
> 
> I tried name + ext first but I got two dots between them, so I
> wrote code that way (the strip thing), and it worked. Today it
> does not work (the strip code cut last character from file
> name, like you said :) ), and I changed it back, now
> everything is OK. I really don't know what happened yesterday.

Having a win32 program take case-sensitive filenames is a bit 
odd, given that the OS is case-agnostic...however, that doesn't 
preclude bad programming on the part of your tool-maker.  Alas.

Thus, to accomodate the lousy programming of your tool's maker, I 
proffer this:

I've found that Win32 doesn't often take a rename if the origin 
and destination differ only in case[*].  Thus, to change the 
case, I've had to do *two* renames...one to, say, prefix with an 
underscore and change the case to my desired case, and then one 
to strip off the leading underscore.  You might try a similar 
song-and-dance to strong-arm Windows into specifying the case of 
the file.  Something like this (untested) code:

	filename = "Spanish Inquisition.TGA"
	name, ext = splitext(filename)
	intermediate = "_" + name + ext.lower()
	rename(filename, intermediate)
	rename(intermediate, intermediate[1:])

And then I'd wrap this contrived abomination in plenty of 
comments so that folks coming back to it understand why you're 
using three lines to do what "should" be just

	rename(filename, name + ext.lower())

as would be the "right" way to rename the file with a lowercase 
version of its extension.

Yes, it's an odd filename choice there which you might not have 
expected...nobody expects the Spanish Inquisition...

-tkc

[*] Have had problems with this both in Explorer and at the 
command prompt.






From fredrik at pythonware.com  Fri Nov 17 12:06:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 18:06:40 +0100
Subject: Heap Memory
In-Reply-To: <312cfe2b0611170856l5df92d1dm64621a397aa0e53@mail.gmail.com>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>	<ejia35$cfk$1@sea.gmane.org>	<312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>	<455D3354.7000002@branda.to>	<mailman.306.1163740659.32031.python-list@python.org>	<lYd7h.7606$l25.6583@newsread4.news.pas.earthlink.net>
	<312cfe2b0611170856l5df92d1dm64621a397aa0e53@mail.gmail.com>
Message-ID: <ejkq6v$n4l$1@sea.gmane.org>

Gregory Pi?ero wrote:

> How does Python use memory on a 64 bit OS?  Is there a lot more
> available to it by default?

as we've already said a couple of hundred times in this thread, Python 
uses *all* the memory it can get from the operating system.  no more, no 
less.

(the link I posted yesterday was about a *BIG* 64-bit machine, with lots 
of gigabytes of RAM, and a lot more swap space.  that doesn't help much 
when when someone's set the per-process memory limit to 128 megabytes ;-)

</F>



From inq1ltd at verizon.net  Fri Nov 17 00:25:39 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 17 Nov 2006 00:25:39 -0500
Subject: Press button to load data
In-Reply-To: <1163734305.075952.21250@k70g2000cwa.googlegroups.com>
References: <1163650825.563379.38550@b28g2000cwb.googlegroups.com>
	<mailman.221.1163657580.32031.python-list@python.org>
	<1163734305.075952.21250@k70g2000cwa.googlegroups.com>
Message-ID: <200611170025.40116.inq1ltd@verizon.net>


Without being able to run the code my question is 
where is the  id  in the lambda defined? 


On Thursday 16 November 2006 22:31, jim wrote:
> Thanks for your help, but now I have a another
> problem so here is my code again
> when I run this it prints <built-in function
> id>
>
> from Tkinter import *
> import shelve
> from tkMessageBox import showerror
>
> shelvename = shelve.open('class-shelve2')
> cat = (' Name ', ' Account # ', ' Amount Due ',
> ' Date Due ')
>
> def NameFields(top):
>     name1 = Label(None, text=cat[0],
> relief=RIDGE, width=20, fg='blue', bg='white',
> font=('bold',15))
>     name2 = Label(None, text=cat[1],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name3 = Label(None, text=cat[2],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name4 = Label(None, text=cat[3],
> relief=RIDGE, width=15, fg='blue', bg='white',
> font=('bold',15))
>     name1.grid(row=0, column=0, sticky=NSEW)
>     name2.grid(row=0, column=1, sticky=NSEW)
>     name3.grid(row=0, column=2, sticky=NSEW)
>     name4.grid(row=0, column=3, sticky=NSEW)
>     top.columnconfigure(0, weight=1)
>     top.columnconfigure(1, weight=1)
>     top.columnconfigure(2, weight=1)
>     top.columnconfigure(3, weight=1)
>
>
> def DisplayBills(top):
>     c=0
>     x = []
>     global bill
>     for bill in shelvename:
>         global funcs
>         bill1 = Button(None, text=
> shelvename[bill].name,
> font=('bold',10),command=(lambda x = id:
> fetchRecord(x)))
>
>         bill2 = Label(None, text=
> shelvename[bill].account, relief=RIDGE,
> font=('bold',10))
>         bill3 = Label(None, text=
> shelvename[bill].paymentDue, relief=RIDGE,
> font=('bold',10), fg='red') bill4 = Label(None,
> text= shelvename[bill].dateDue, relief=RIDGE,
> font=('bold',10))
>         bill1.grid(row=c, column=0,
> sticky=NSEW) bill2.grid(row=c,column=1,
> sticky=NSEW) bill3.grid(row=c,column=2,
> sticky=NSEW) bill4.grid(row=c,column=3,
> sticky=NSEW) c = c + 1
>     return bill
>
> def fetchRecord(x):
>     print x
>
>
>
> top = Tk()
>
> DisplayBills(top), NameFields(top)
>
> mainloop()
>
> jim-on-linux wrote:
> > Just from a glance my thoughts are to
> > start with one file and build on it. Make
> > a class of it so you can loop it to use
> > it over for each record.
> >
> >
> > You wrote that the info was in a file on
> > the hd. If it is in a file on the hd, use the
> > open()
> > function, read from the file, only one record
> > and write the data to a list.
> >
> > You can incorporate the
> > button option,
> >
> > "command = CallSomeFunction",
> >
> > to call a function that builds a window,
> > and loads the data into labels or
> > entry boxes.
> > If you are going to modify
> > the data, entry boxes allow you to
> > modify it and save it back to a
> > file.
> >
> > Also, when using the open() function,
> > close it after you get the data you need.
> > otherwise you may experience
> > unexpected problems.
> >
> > client = open('client', 'r')
> > client.read() (readline()) (readlines())
> > client.close()
> >
> > jim-on-linux
> >
> > http//:www.inqvista.com


From mccredie at gmail.com  Wed Nov 15 19:23:09 2006
From: mccredie at gmail.com (Matimus)
Date: 15 Nov 2006 16:23:09 -0800
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
Message-ID: <1163636588.973468.37990@k70g2000cwa.googlegroups.com>


John Bokma wrote:
> Intelligent people don't suffer from fanboy sentiments. They just pick a
> language that works best for them.

Adding to that, they pick the language that works best for them and the
situation. Python has a significant advantage in many applications
because it is dynamic and can be used for rapid development. IMHO,
usually more rapid than Java. Hopefully Java being GPL'd will make it
easier to deploy applications, especially on Linux. There are many
applications where Java has a significant advantage. I plan to make use
of both.



From alistair.king at helsinki.fi  Tue Nov  7 05:54:36 2006
From: alistair.king at helsinki.fi (Alistair King)
Date: Tue, 07 Nov 2006 12:54:36 +0200
Subject: create global variables?-the full story
In-Reply-To: <eid0jn$phb$1@web.aioe.org>
References: <1162275890.4546ec32cd351@www2.helsinki.fi>	<ei732n$2hg$1@sea.gmane.org>	<45471B66.9060702@helsinki.fi>	<ei76rh$f4p$1@sea.gmane.org>	<mailman.1537.1162294403.11739.python-list@python.org>
	<eid0jn$phb$1@web.aioe.org>
Message-ID: <455065EC.9070104@helsinki.fi>

J. Clifford Dyer wrote:
>> OK...
>>
>> from the start.
>>
>> im trying to develop a simple command line application for determining
>> the degree of substitution (DS) on a polymer backbone from elemental
>> analysis, i.e., the % weights of different elements in the
>> monomer-substituent compound ( i want each element to give a result and
>> heaviest atoms give the most accurate results).
>>
>> most basic comp chem programs use input files but i dont know anything
>> about file iteration yet and want the program to be as user friendly as
>> possible..i.e. command line prompt. GUI would be great but too much for
>> me at this stage
>>
>> at the start of the script i have 2 dictionaries 1) containing every
>> atom in the periodic table with associated isotopic average masses 2)
>> containing the molecular forumla of the monomer unit...eg for cellulose
>> AGU {'C': 6, 'H': 10, 'O': 5}.
>>
>> the basic steps are
>>
>> 1. calculate the weight percentage values for each atom in the monomer
>> 2. iterate into dictionaries from DS=0 - DS=15 (0.00005 step) the
>> projected % values for the monomer plus substituent, for EACH atom in
>> the compound.
>> 3. find the (local) minimum from each dictionary/atom to give the
>> appropriate DS value.
>>
>> *Note* I have to iterate ALL the values as there is a non-linear
>> relationship between % values and DS due to the different atomic weights
>> The computer seems to cope with this in about 10 seconds with the above
>> parameters and about 8 elements for the iteration step
>>
>>     
>
> Since you have a parallel structure for each element, consider using a 
> dictionary with the element names as keys:
>
>  >>> atomicdata = {}
>  >>> for element in 'C','H','U':
> ...	atomicdata[element] = getAtomVars(element)
> ...
>  >>> print atomicdata
> { 'C': (1, 2), 'H': (4, 5), 'U': (78, 20) }
>
> The first value of each tuple will be your Xaa, and the second value 
> will be Xma.  Do you really need to keep the names Caa, Cma, Haa, Hma 
> around?  Instead of Caa, you have atomicdata['C'][0] and Cma becomes 
> atomicdata['C'][1].  Completely unambiguous.  A bit more verbose, 
> perhaps, but you don't have to try to sneak around the back side of the 
> language to find the data you are looking for.  That's very much against 
> the tao.  If you really want the names, nest dicts, but don't try to get 
> the element name into the keys, because you already have that:
>
>  >>> atomicdata = { 'C': { 'aa': 1,
> ...                       'ma': 2},
> ...                'H': { 'aa': 4
> ...                       'ma': 5},
> ...                'U': { 'aa': 78
> ...                       'ma': 20} }
>
> and to get from there to storing all your data for all however many 
> steps, change the value of each entry in atomic data from a tuple (or 
> dict) to a list of tuples (or dicts).
>
>
>  >>> atomicdata = { 'C': [ (1,2), (4,6), (7,8), (20,19) ],
> ...                'H': [ (5,7), (2,986), (3,4) ] }
>  >>> atomicdata['H'].append((5,9))
>  >>> atomicdata
> { 'C': [ (1, 2), (4, 6), (7, 8), (20, 19) ], 'H': [ (5, 7), (2, 986), 
> (3, 4), (5, 9) ] }
>
> You can build up those lists with nested for loops. (one tells you which 
> element you're working on, the other which iteration).
>
> The indexes of your lists, of course, will not correspond to the DS 
> values, but to the step number.  To get back to the DS number, of 
> course, let the index number be i, and calculate DS = i * 0.00005
>
> That should get you off and running now.  Happy pythoning!
>
> Cheers,
> Cliff
>   
Thanks Cliff,

this is what i need, it seems to make much more sense to do this way. I
think once i learn to include datastructures within each other im gonna
try to make up this 3D 'array' (i think this is a word from C, is there
a python equivalent?) of further iterations within each iteration to
take into account the excess water. For this i think ill have to add
another 100 values onto the values i already have, i.e. 1.8x10**8
entries in total and god knows how many calculations in potentially one
datastructure. Could my computer cope with this or should i try a series
of refinement iterations? Does anyone knows of a simple way of
determining how much processer time it takes to do these calculations?

thanks

a

-- 
Dr. Alistair King
Research Chemist,
Laboratory of Organic Chemistry,
Department of Chemistry,
Faculty of Science
P.O. Box 55 (A.I. Virtasen aukio 1)
FIN-00014 University of Helsinki
Tel. +358 9 191 50392, Mobile +358 (0)50 5279446
Fax +358 9 191 50366 



From python.list at tim.thechases.com  Fri Nov 17 14:48:27 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 17 Nov 2006 13:48:27 -0600
Subject: remove a list from a list
In-Reply-To: <1163792832.404528.187950@k70g2000cwa.googlegroups.com>
References: <ejkv1u$ajf$1@sea.gmane.org><455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>
	<455E0A20.9000509@tim.thechases.com>	<mailman.369.1163792062.32031.python-list@python.org>
	<1163792832.404528.187950@k70g2000cwa.googlegroups.com>
Message-ID: <455E120B.3040104@tim.thechases.com>

> from sets import Set as set   # Python 2.3
> 
> b = list( set([i.upper() for i in b) - set([i.upper() for i in a] ) )

Just a caveat...this can change the order of items in the results 
as sets (and their differences) are inherently unordered data 
structures.  If order of the items in the list need to preserved, 
it must remain as a list.  However, if the order of the resulting 
list doesn't matter, this is a good solution.

-tkc





From fredrik at pythonware.com  Mon Nov 20 11:46:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 17:46:36 +0100
Subject: sending image pil 1.1.5 by network
In-Reply-To: <1164039347.784574.294770@h54g2000cwb.googlegroups.com>
References: <1164039347.784574.294770@h54g2000cwb.googlegroups.com>
Message-ID: <ejsm5c$ad4$1@sea.gmane.org>

maxime_phan at hotmail.com wrote:

> Hello everyone, I'm trying to make a webcam software with python, pil
> library and enet (networking)
> Now I have in the client my pil image get from webcam, ready to be send
> by network.
> 
> I do that:
> 
> self.peer.send(0, image.tostring(), enet.FLAG_RELIABLE)
> 
> and I have this error:
> TypeError: argument 2 must be string without null bytes, not str
> 
> does someone know what kind of convertion I should do to make it work?

"self.peer", whatever that is, doesn't seem to support transfer
of binary data.  better talk to the vendor.

(you could in theory use base64 encoding or some other text-only 
representation of binary data, but that doesn't seem like a very 
practical solution for a webcam application.)

</F>



From dlenski at gmail.com  Mon Nov 13 13:14:57 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 13 Nov 2006 10:14:57 -0800
Subject: Is python for me?
In-Reply-To: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
Message-ID: <1163441697.231672.163480@k70g2000cwa.googlegroups.com>

lennart wrote:
> But I'm not a full-time programmer. I know, that I've only time &
> possibility to learn one (= 1) language good. So i ask myself is python
> the language I'm looking for?

Yep!  Python is very much a jack-of-all-trades language.  I've used it
for similar tasks, including as a front-end for dcraw (I have a little
python script to slurp images from a camera with dcraw and convert them
all to JPEG).

Python has excellent libraries for image manipulation (for example
Python Imaging Library) and for abstracting an SQL database to an
object-oriented form that makes it a snap to work with (I love
SQLAlchemy).

You can learn Python really fast, and it sort of guides you in the
right direction by providing a correct way to do almost everything
without constraining you, so that your code will be consistent and
readable.  This, in my opinion, is Python's chief advantage over Perl,
which is the other highly popular dynamic jack-of-all-trades language.
I learned Perl about 10 years ago and loved it for a while, but it's
messy as heck and I find my own code from a few months ago nearly
unreadable... I also spend a lot more time debugging Perl code because
there are so many error-prone things that are silenty allowed rather
than flagged as errors.

I've been using Python for several months and it's just great for
everything.  I think it's an ideal first or only programming language!
I've had no reason to write a program in anything else since learning
Python, and I write a LOT of little throwaway programs.

Dan



From spe.stani.be at gmail.com  Mon Nov 13 20:17:56 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 13 Nov 2006 17:17:56 -0800
Subject: Is python for me?
In-Reply-To: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
Message-ID: <1163467075.938506.148290@h54g2000cwb.googlegroups.com>

lennart schreef:

> [*] As a photographer i like to build a picture management system

Cornice, a cross-platform image viewer, might be a good start.

Features
Here is a list of the main features of Cornice:

    * Fully cross-platform: it should run wherever wxPython does;
    * Detail and thumbnail view for images;
    * Image preview;
    * Automatic recognition of images, with a variety of formats
supported;
    * Bookmarks;
    * Full-screen view;
    * Zooming and rotation;
    * Slideshow;
    * Good keyboard navigation (still not perfect, but this is true for
all the features ;-);
    * Image loading from zip archives;
    * i18n support (with Italian and French translations available);
    * EXIF data support;
    * Some more...

For more info, take a look at
http://wxglade.sourceforge.net/extra/cornice.html

Stani

--
http://pythonide.stani.be



From henning.von.rosen at gmail.com  Wed Nov  8 23:10:13 2006
From: henning.von.rosen at gmail.com (henning)
Date: 8 Nov 2006 20:10:13 -0800
Subject: string to list of numbers conversion
In-Reply-To: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <1163045413.523267.146150@m73g2000cwd.googlegroups.com>

jm.suresh at no.spam.gmail.com skrev:

> Hi,
>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers.

I think your question is deeper and more natural than is clear from the
many recepies given so far in this thread, so I'll take on another
point of view,

>From a language design perspective, there is no reason why not the
parsing capacity of the Python interpreter would be accessible in a
modular fashion to the user/programmer. E.g used like this:

I an imaginable Python, define you expect for an answer. In this case:
(1)
# import junctions, types from maybefuture:-)
string = ((1,2), (3,4))
type a = tuple a | int
myTuple = eval(string, goal=a)


Obviously, if you expect _only_ the given form, then this might be
better:

(2)
# import types from maybefuture:-)
type a = ((int,int),(int,int))
myTuple = eval(string, goal=a)

Note the use of a "a|b" in line 2 (I think Perl 6 is among the few
programming languages giving a reasonable semantics to junctions so
far).

Version 2 above sholud not be a big addition to Python conceptually.
Motivation:
It is easy to think clearly about.
It makes it easier to use eval safely and makes code more readable.

This is a topic of interest to me, so feel free to post either on list
or directly to me.

Thanks/Henning



From jkn_gg at nicorp.f9.co.uk  Tue Nov 14 06:30:25 2006
From: jkn_gg at nicorp.f9.co.uk (nic)
Date: 14 Nov 2006 03:30:25 -0800
Subject: graphical class diagram tool?
Message-ID: <1163503825.406640.171740@m73g2000cwd.googlegroups.com>

Hi all
    Some years ago I saw a graphical class diagram generated by
examining a python program. I *thought* that this was done with Boa
Constructor, but I may be wrong. I've download a recent version of BC
and can't find reference to this feature. Can anyone point me at other
tools to do this?

    Thanks
    J^n



From onurb at xiludom.gro  Wed Nov  8 06:24:32 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Wed, 08 Nov 2006 12:24:32 +0100
Subject: object data member dumper?
In-Reply-To: <4550fbfc$0$12098$88260bb3@free.teranews.com>
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
	<4550fbfc$0$12098$88260bb3@free.teranews.com>
Message-ID: <4551be71$0$5333$426a34cc@news.free.fr>

tom arnall wrote:
> Bruno Desthuilliers wrote:
> 
>> tom arnall a ?crit :
>>> does anyone know of a utility to do a recursive dump of object data
>>> members?
>>>
>> What are "object data members" ? (hint: in Python, everything is an
>> object - even functions and methods).
>>
>> What is your real use case ?
> 
> something like:
> 
>    class A:

Make it :
     class A(object):

>       def __init__(self, p1):
>          self.p1 = p1
> 
>    class B: 
>       def __init__(self,p1, p2):
>          self.a = A(p1)
>          self.p2 = p2
>          self.v1 = '3'
> 
>    class C:
>       def __init__(self):
>          self.b = B(3,4)
>          self.p3 = 5
> 
>    class D:
>       def __init__(self):
>          self.v2=2
>          self.o1 = C()
>          self.o2 = B(11,12)
> 
> 
>    d = D()
>    objectDataDumper(d)
> 
> 
> would produce something like:
> 
>    object of class D with:
>    o1(C)->b(B)->a(A)->p1=3
>    o1(C)->b(B)->p2=4
>    o1(C)->b(B)->v1=3
>    o1(C)->p3=5
>    o2(B)->a(A)->p1=11
>    o2(B)->p2=12
>    o2(B)->v1=3
>    v2=2

Ok, so this is for debugging purpose ?

A small question : how should this behave for:
- _implementation attributes
- __magic__ attributes
- class attributes
- callable attributes
- properties and other descriptors  ?

In fact, the problem is that in Python, everything's an object, and an
object is mostly a composed namespace (ie a set of name-object mappings)
subject to some lookup rules. FWIW, the class of an object is an
attribute (__class__) referencing the class objet; superclasses are
class objects referenced by the __bases__ and __mro__ attributes of the
class object; method objects are usually attributes of the class object,
but it's possible to add/replace methods on a per-instance basis;
properties are class attributes that most of the time works on some
instance attribute. etc, etc, etc... Even the code of a function is an
attribute of the function object. And as an icing on top of the cake,
there's the __getattr__ magic method...

With all this in mind, writing a generic python object inspector is not
that trivial : either you'll end up with way too much informations or
you'll arbitrary skip informations that would be useful in a given
context or you'll need to pass so much args to the inspector that it'll
become too heavy for a quick, intuitive use... Well, that's at least my
own experience.

OTOH, "live" inspection of an object (either in the Python shell or in a
pdb session) works fine. The pprint and inspect modules may help too.

My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Eric_Dexter at msn.com  Fri Nov 10 19:04:19 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 10 Nov 2006 16:04:19 -0800
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163203459.695403.19830@m7g2000cwm.googlegroups.com>

You can get educated in java through manpower for free just apply for a
job(through thier online learning thing) but you can't add python to
your plan.  :(  They have pearl, c, basic, cobol also but no
python.....

https://sourceforge.net/project/showfiles.php?group_id=156455


gavino wrote:
> both are interpreted oo langauges......



From f.braennstroem at gmx.de  Sat Nov  4 03:47:48 2006
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Sat, 4 Nov 2006 09:47:48 +0100
Subject: small python cgi webserver
Message-ID: <eihk3k$374$1@sea.gmane.org>

Hi,

I am looking for a small python script, which starts a small
web server with python cgi support on a linux machine.

I tried:


  #!/usr/bin/env python
  import sys
  from CGIHTTPServer import CGIHTTPRequestHandler
  import BaseHTTPServer
  
  class MyRequestHandler(CGIHTTPRequestHandler):
      # In diesem Verzeichnis sollten die CGI-Programme stehen:
      cgi_directories=["/home/fab/Desktop/cgi-bin"]
  
  
  def run():
      # 8000=Port-Nummer
      #   --> http://localhost:8000/
      # Fuer http://localhost/ 
      #   Port-Nummer auf 80 setzen
      httpd=BaseHTTPServer.HTTPServer(('', 8000), MyRequestHandler)
      httpd.serve_forever()
  
  if __name__=="__main__":
      print "Starting Server"
      run()

but when I want to test a small python cgi test file:


  #!/usr/bin/python
  # -*- coding: UTF-8 -*-

  # Debugging f??r CGI-Skripte 'einschalten'
  import cgitb; cgitb.enable()

  print "Content-Type: text/html;charset=utf-8\n"
  print "Hello World!"

I just get the text and not the html output. The file's mode
is 755.

Is there anything wrong with the webserver script or do I do
something completely wrong? Maybe, you have a different
webserver script?

Greetings!
 Fabian



From ptmcg at austin.rr._bogus_.com  Sat Nov 18 06:31:49 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sat, 18 Nov 2006 11:31:49 GMT
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org><1163835505.102190.140060@b28g2000cwb.googlegroups.com>
	<mailman.408.1163844581.32031.python-list@python.org>
Message-ID: <FaC7h.73$_H5.19@tornado.texas.rr.com>

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.408.1163844581.32031.python-list at python.org...
>
> (XML is a bit unusual in this respect, but that's probably just some 
> variation of the bikeshed effect.  it's just text, and everyone with
> a keyboard knows what that is, so we don't need to use established 
> software engineering practices, or think about security *at all* (Billion 
> laughs? XXE?) or, for that matter, learn from people who's
> been doing data interchange in other domains since the dawn of time. and 
> when they do appear anyway, and mess with our technology in ways that we 
> haven't authorized, without reading our books or going to our seminars or 
> subscribing to our mailing lists, we can write them off as "clueless 
> muppet teenage genius code-jockeys", and keep patting our- selves on the 
> back, while the rest of the world is busy routing around us, switching to 
> well-understood XML subsets or other serialization formats, simpler and 
> more flexible data models, simpler API:s, and
> more robust code.  and Python ;-)
>

maybe time to switch to decaf... :)





From DustanGroups at gmail.com  Sat Nov 25 18:09:51 2006
From: DustanGroups at gmail.com (Dustan)
Date: 25 Nov 2006 15:09:51 -0800
Subject: a -very- case sensitive search
In-Reply-To: <pan.2006.11.25.23.16.02.49327@REMOVE.THIS.cybersource.com.au>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<pan.2006.11.25.23.16.02.49327@REMOVE.THIS.cybersource.com.au>
Message-ID: <1164496191.432923.37480@45g2000cws.googlegroups.com>


Steven D'Aprano wrote:
> On Sat, 25 Nov 2006 13:39:55 -0800, Ola K wrote:
>
> > Hi,
> > I am pretty new to Python and I want to make a script that will search
> > for the following options:
> > 1) words made of uppercase characters -only- (like "YES")
> > 2) words made of lowercase character -only- (like "yes")
> > 3) and words with only the first letter capitalized (like "Yes")
> > * and I need to do all these considering the fact that not all letters
> > are indeed English letters.
> >
> > I went through different documention section but couldn't find a right
> > condition, function or method for it.
>
> At the command prompt:
>
>
> >>> dir('')
> # result edited for clarity
> [ ... 'isalnum', 'isalpha', 'isdigit', 'islower',
> 'isspace', 'istitle', 'isupper',  ... ]
>
> Then do this:
>
> >>> help(''.islower)
>
> and read the text it provides. Then experiment on the command line:
>
> >>> 'abcd1234'.islower()
> True
> >>> 'aBcd1234'.islower()
> False

Forget what I said; I didn't know about the str.is* methods.

> Then come back to us if they aren't suitable, and tell us WHY they aren't
> suitable.
> 
> 
> -- 
> Steven.



From petercable at gmail.com  Mon Nov 27 04:46:37 2006
From: petercable at gmail.com (petercable at gmail.com)
Date: 27 Nov 2006 01:46:37 -0800
Subject: synching with os.walk()
In-Reply-To: <mailman.679.1164383825.32031.python-list@python.org>
References: <mailman.679.1164383825.32031.python-list@python.org>
Message-ID: <1164620797.157646.244340@j44g2000cwa.googlegroups.com>



On Nov 24, 7:57 am, "Andre Meyer" <m... at acm.org> wrote:
>
> os.walk() is a nice generator for performing actions on all files in a
> directory and subdirectories. However, how can one use os.walk() for walking
> through two hierarchies at once? I want to synchronise two directories (just
> backup for now), but cannot see how I can traverse a second one. I do this
> now with os.listdir() recursively, which works fine, but I am afraid that
> recursion can become inefficient for large hierarchies.
>

I wrote a script to perform this function using the dircmp class in the
filecmp module. I did something similar to this:
import filecmp, os, shutil

def backup(d1,d2):
  print 'backing up %s to %s' % (d1,d2)
  compare = filecmp.dircmp(d1,d2)
  for item in compare.left_only:
    fullpath = os.path.join(d1, item)
    if os.path.isdir(fullpath):
      shutil.copytree(fullpath,os.path.join(d2,item))
    elif os.path.isfile(fullpath):
      shutil.copy2(fullpath,d2)
  for item in compare.diff_files:
    shutil.copy2(os.path.join(d1,item),d2)
  for item in compare.common_dirs:
    backup(os.path.join(d1,item),os.path.join(d2,item))

if __name__ == '__main__':
  import sys
  if len(sys.argv) == 3:
    backup(sys.argv[1], sys.argv[2])

My script has some error checking and keeps up to 5 previous versions
of a changed file. I find it very efficient, even with recursion, as it
only actually copies those files that have changed. I sync somewhere
around 5 GB worth of files nightly across the network and I haven't had
any trouble.

Of course, if I just had rsync available, I would use that.

Hope this helps,

Pete



From sjmachin at lexicon.net  Thu Nov  2 00:11:19 2006
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 02 Nov 2006 16:11:19 +1100
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <17737.26706.452653.458388@montanaro.dyndns.org>
References: <eib0la$86i$1@newslocal.mitre.org>
	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>
	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
	<1162434526.601605.315560@k70g2000cwa.googlegroups.com>
	<17737.26706.452653.458388@montanaro.dyndns.org>
Message-ID: <45497DF7.5040600@lexicon.net>

On 2/11/2006 2:38 PM, skip at pobox.com wrote:
>     >> ...alternatively you can just use 'unix slashes', e.g.
>     >> 'c:/temp/book1.csv', since those work just fine 'cause the Windows
>     >> APIs deal with them properly.
> 
>     John> Not all APIs do the right thing. If you fire up the cmd.exe shell
>     John> and feed it slashes as path separators, it barfs. Example:
>     John>     C:\junk>dir c:/junk/*.bar
>     John>     Invalid switch - "junk".
>     John> Hence the advice to use rawstrings with backslashes -- they work
>     John> under all circumstances.
> 
> I think he means "the Windows APIs" within a Python program.
> 
> Skip
> 

I too think he meant that. I left the mental gymnastics of wrapping what 
I wrote into an os.system call as an exercise for the reader.

| >>> import os
| >>> os.system("dir c:/junk/*.bar")
| Invalid switch - "junk".
| 1
| >>> os.system(r"dir c:\junk\*.bar")
| [snip]
| 02/11/2006  01:21 PM                 8 foo.bar
| [snip]
| 0
| >>>

Cheers,
John





From george.sakkis at gmail.com  Wed Nov 29 20:15:03 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 29 Nov 2006 17:15:03 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e08ba$0$1505$db0fefd9@news.zen.co.uk>
Message-ID: <1164849303.053474.97990@j72g2000cwa.googlegroups.com>

Will McGugan wrote:
> > #!/usr/bin/python -OO
> > import math
> > import sys
> > import psyco
> >
> > psyco.full()
> >
> > def primes():
> >     primes=[3]
> >     for x in xrange(5,10000000,2):
> >         maxfact = int(math.sqrt(x))
> >         flag=True
> >         for y in primes:
> >             if y > maxfact:
> >                 break
> >             if x%y == 0:
> >                 flag=False
> >                 break
> >         if flag == True:
> >             primes.append(x)
> > primes()
> >
>
> Some trivial optimizations. Give this a whirl.
>
> def primes():
>      sqrt=math.sqrt
>      primes=[3]
>      for x in xrange(5,10000000,2):
>          maxfact = int(sqrt(x))
>          for y in primes:
>              if y > maxfact:
>                  primes.append(x)
>                  break
>              if not x%y:
>                  break
>      return primes

You can also save an attribute lookup for append; just add
append = primes.append
outside of the loop and replace primes.append(x) with append(x)
That should cut down a few fractions of second.

George



From richie at entrian.com  Wed Nov 22 09:56:23 2006
From: richie at entrian.com (Richie Hindle)
Date: Wed, 22 Nov 2006 14:56:23 +0000
Subject: What's going on here?
In-Reply-To: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <b4p8m25gv79peoi11janlojmubhs7cmtho@4ax.com>


> What is subclassing adding to the class here?

A __dict__:

>>> o = object()
>>> dir(o)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__',
'__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',
'__setattr__', '__str__']
>>> class C(object): pass
...
>>> c = C()
>>> dir(c)
['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__',
'__hash__', '__init__', '__module__', '__new__', '__reduce__',
'__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__']

-- 
Richie Hindle
richie at entrian.com


From amitsoni.1984 at gmail.com  Mon Nov  6 23:33:56 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 6 Nov 2006 20:33:56 -0800
Subject: using split function
Message-ID: <1162874036.351559.263280@i42g2000cwa.googlegroups.com>

Hi,

I have to write a code in python to read a matrix from a text file and
for that i am using following code. But it gives an error saying
"NameError: name 'split' is not defined". Can anyone help me with this.
-------------------------------------------------
#!/usr/bin/python
import numpy
file = open('matrix.txt', 'r')

count =  0
ra = numpy.random
A = ra.standard_normal((4,4))
while 1:
    lineStr = file.readline()
    if not(lineStr):
        break

    count = count + 1
    row=split(lineStr)
    A[count,:]=row

matrix.close()
-----------------------------------------------------
Also, i want to initialize the matrix A by zeros, but using A=zeros([4,
4]) was giving a similar error "NameError: name 'zeros' is not
defined". 

Thank you
Amit



From steve at holdenweb.com  Thu Nov 16 05:30:52 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 10:30:52 +0000
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejhdnt$hq6$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>	<ejhcdm$3pv$1@wake.carmen.se>
	<ejhdnt$hq6$1@sea.gmane.org>
Message-ID: <ejheig$jai$1@sea.gmane.org>

Fredrik Lundh wrote:
> Magnus Lycka wrote:
> 
>> Which is the better writing style for text intended for human readers?
>>
>> I have some things to say:
>>      Seagulls belong in the sky.
>>      Colon fits in the text.
>>
>> I have some things to say
>> {
>>      Seagulls belong in the text.
>>      Colon fits in the belly.
>> }
> 
> have anyone counted the number of colons used in this way by the OP,
> in his first few posts ?  (if there isn't a name for the law that
> states that the number for a "let's remove the colons" proposal is 
> always greater than zero, someone should come up with one...)
> 
I'm always surprised by the amount of energy that's put into this type 
of discussion - even the OP has suggested that this isn't a big issue. 
If it's not a big issue why is this thread still going? Every language 
has a syntax. Why not just accept it as a given and get on with more 
productive activities?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From no-spam at no-spam-no-spam.invalid  Sat Nov 11 06:02:38 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 11 Nov 2006 12:02:38 +0100
Subject: numpy/scipy: correlation
Message-ID: <ej4akj$vbe$1@news.albasani.net>

Is there a ready made function in numpy/scipy to compute the correlation y=mx+o of an X and Y fast: 
m, m-err, o, o-err, r-coef,r-coef-err ?

Or a formula to to compute the 3 error ranges?

-robert

PS:

numpy.corrcoef computes only the bare coeff:
>>> numpy.corrcoef((0,1,2,3.0),(2,5,6,7.0),)
array([[ 1.        ,  0.95618289],
       [ 0.95618289,  1.        ]])

with ints it goes computes wrong:
>>> numpy.corrcoef((0,1,2,3),(2,5,6,7),)
array([[ 1.        ,  0.94491118],
       [ 0.94491118,  1.        ]])



From tjreedy at udel.edu  Wed Nov 15 16:57:53 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 15 Nov 2006 16:57:53 -0500
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper><mailman.2125.1163295096.11739.python-list@python.org><pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au><1163322853.760315.51040@k70g2000cwa.googlegroups.com>
	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
Message-ID: <ejg2h0$rpg$1@sea.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:455b82a0$0$7054$c3e8da3 at news.astraweb.com...
> John Machin wrote:
>
>> Here in Austraila, (I expect this is common to most countries), there
>> are people who are utterly clueless about elementary data model rules,
>> like identification "numbers" should be kept as strings.
>
> Do you mean that ID numbers that serve as a primary key in a database
> should also be strings?

If you mean user-entered data like social security, phone, account, part, 
or postal code 'numbers' -- as opposed to internal db-generated numbers 
that the user never sees -- this I would presume 'yes'.

tjr





From john at castleamber.com  Wed Nov 15 22:12:11 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 03:12:11 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
	<1163636588.973468.37990@k70g2000cwa.googlegroups.com>
Message-ID: <Xns987CD7AF642DCcastleamber@130.133.1.4>

"Matimus" <mccredie at gmail.com> wrote:

> 
> John Bokma wrote:
>> Intelligent people don't suffer from fanboy sentiments. They just
>> pick a language that works best for them.
> 
> Adding to that, they pick the language that works best for them and
> the situation.

Yup.

> Python has a significant advantage in many applications
> because it is dynamic and can be used for rapid development. IMHO,
> usually more rapid than Java. Hopefully Java being GPL'd will make it
> easier to deploy applications, especially on Linux. There are many
> applications where Java has a significant advantage. I plan to make
> use of both.

Yes, my point. I program mostly in Perl, use Java now and then, and am
still working on learning Python. 

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From anthra.norell at vtxmail.ch  Wed Nov 29 06:05:36 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Wed, 29 Nov 2006 12:05:36 +0100
Subject: utf - string translation
In-Reply-To: <1164529973.299095.155940@n67g2000cwd.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>	<mf19h.1992$%_2.1833@newsfe19.lga>	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>
Message-ID: <456D6980.1040000@vtxmail.ch>

Dan wrote:
> On 22 nov, 22:59, "John Machin" <sjmac... at lexicon.net> wrote:
>
>   
>>> processes (Vigen?re)
>>>       
>> So why do you want to strip off accents? The history of communication
>> has several examples of significant difference in meaning caused by
>> minute differences in punctuation or accents including one of which you
>> may have heard: a will that could be read (in part) as either "a chacun
>> d'eux million francs" or "a chacun deux million francs" with the
>> remainder to a 3rd party.
>>
>>     
> of course.
> My purpose is not doing something realistic on a cryptographic view.
> It's for learning rudiments of programming.
> In fact, coding characters is a kind of cryptography I mean, sometimes,
> when friends can't read an email because of the characters used...
>
> I wanted to strip off accents because I use the frequences of the
> charactacters. If  I only have 26 char, it's more easy to analyse (the
> text can be shorter for example)
>
>   
Try this:

from_characters   = 
'\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd8\xd9\xda\xdb\xdc\xdd\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xff\xe7\xe8\xe9\xea\xeb'
to_characters     = 
'AAAAAAACEEEEIIIIDNOOOOOOUUUUYaaaaaaaiiiionoooooouuuuyyceeee'
translation_table = string.maketrans (from_characters, to_characters)
translated_string = string.translate (original_string, translation_table)


Frederic




From ptmcg at austin.rr._bogus_.com  Tue Nov 28 03:21:30 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 28 Nov 2006 08:21:30 GMT
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
Message-ID: <ekSah.4317$_H5.2754@tornado.texas.rr.com>

"HYRY" <zhangry at feng.co.jp> wrote in message 
news:1164699156.682944.97410 at j44g2000cwa.googlegroups.com...
>I want to join two mono wave file to a stereo wave file by only using
> the default python module.
> Here is my program, but it is much slower than the C version, so how
> can I increase the speed?
> I think the problem is at line #1, #2, #3.
>
I'm not overly familiar with the array module, but one place you may be 
paying a penalty is in allocating the list of 0's, and then interleaving the 
larray and rarray lists.

What if you replace lines 1-3 with:

def takeOneAtATime(tupleiter):
    for i in tupleiter:
        yield i[0]
        yield i[1]

oarray = array.array("h",takeOneAtATime(itertools.izip(larray,rarray)))

Or in place of calling takeOneAtATime, using itertools.chain.

oarray = array.array("h", itertools.chain(*itertools.izip(larray,rarray)))

Use itertools.izip (have to import itertools somewhere up top) to take left 
and right values in pairs, then use takeOneAtATime to yield these values one 
at a time.  The key though, is that you aren't making a list ahead of time, 
but a generator expression.  On the other hand, array.array may be just 
building an internal list anyway, so this may just be a wash.

Also, try psyco, if you can, especially with this version.  Or pyrex to 
optimize this data-interleaving.

HTH,
-- Paul




From gregpinero at gmail.com  Thu Nov 16 12:15:31 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Thu, 16 Nov 2006 12:15:31 -0500
Subject: Heap Memory
In-Reply-To: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
Message-ID: <312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>

On 11/16/06, Bugra Cakir <bugracakir at gmail.com> wrote:
> Hi my name is Bugra Cakir,
>
> I have a question. How can we increase heap memory or total memory Python
> interpreter
> will use in order to avoid memory problems ?

I've wondered the same thing myself.  Even if it turns out it's just
not possible I hope you get an answer.

My completely arbitrary guess is you'd have to recompile Python, but I
hope I'm wrong.

-Greg


From gagsl-py at yahoo.com.ar  Sat Nov 11 02:18:44 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 11 Nov 2006 04:18:44 -0300
Subject: UnboundLocalError
In-Reply-To: <1163223355.190176.127030@h48g2000cwc.googlegroups.com>
References: <1163083074.786927.184170@i42g2000cwa.googlegroups.com>
	<mailman.1994.1163100168.11739.python-list@python.org>
	<Xns9876D10C5759CrtwfreenetREMOVEcouk@216.196.109.145>
	<1163223355.190176.127030@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061111032430.038b9e68@yahoo.com.ar>

At Saturday 11/11/2006 02:35, Camellia wrote:

>But sorry I'm so dumb I can't say I really understand,
>what do I actually do when I define a function with its name "number"?

Don't apologize, Python is a lot more dumb than you. It obeys very 
simple rules (a good thing, so we can clearly understand them, once 
we know them).
Recalling your previous example:

> > >> def main():
> > >>    number = number()

Python first scans the source code looking for assigned-to names. 
That is, names to the left of equal signs. Those names, plus the 
function formal parameters, make the list of "local names". Any other 
names referenced are assumed to be globals, that is, living outside 
your function. (That's not entirely true but enough for now).
Notice that "number" is a local name because it's assigned to; it 
doesn't matter whether a global name "number" exists or not.
When the code is executed, the "number" to the right references the 
local name, which has not been assigned to yet - that's why you get 
an UnboundLocalError. "number" can't be a global name when used on 
the right hand side, and a local name when used on the left hand 
side. It's simple: it is local, or not, but not both.

>why does a name of a function has something to do with a variable?

Notice also that it does not matter *what* kind of object a name 
refers to: it may be a function, a class, an object instance, 
whatever. Inside a function, by example, a local name "a" may be 
bound at most to a single object at a time, it doesn't matter its 
type. A local name "a" can't refer to an integer and a class at the same time.
The left hand side of an assign statement *always* uses local names, 
except when you declare a name to be global by using the "global" keyword.
And notice also that I've never used the word variable.

>Oh wait can I do this in Python?:
><code>
>def a():
>     def b()
></code>
>
>so the b() will appear to be a local function which is the possible
>cause of my little own error because the compiler will interpret the
>number() as a local function but a global one?

Yes, you can. Python has "lexically nested scopes". The simple 
local/global rule of above is a bit more complicated: when a name is 
not local, it is searched inside the enclosing functions, then in the 
containing module's global namespace, and last in the builtin names. 
And yes, b is local to a, so it effectively hides any external b that 
could be in outer scopes.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Thu Nov 16 06:00:30 2006
From: sjmachin at lexicon.net (John Machin)
Date: 16 Nov 2006 03:00:30 -0800
Subject: split CSV fields
References: <ejhduq$l5l$1@news.albasani.net>
	<mailman.238.1163673019.32031.python-list@python.org>
Message-ID: <1163674830.440318.246920@f16g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> robert wrote:
>
> > What is a most simple expression for splitting a CSV line
>  > with "-protected fields?
> >
> > s='"123","a,b,\"c\"",5.640'
>
> import csv
>
> the preferred way is to read the file using that module.  if you insist
> on processing a single line, you can do
>
>      cols = list(csv.reader([string]))
>
> </F>

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
| >>> import csv
| >>> s='"123","a,b,\"c\"",5.640'
| >>> cols = list(csv.reader([s]))
| >>> cols
[['123', 'a,b,c""', '5.640']]
# maybe we need a bit more:
| >>> cols = list(csv.reader([s]))[0]
| >>> cols
['123', 'a,b,c""', '5.640']

I'd guess that the OP is expecting 'a,b,"c"' for the second field.

Twiddling with the knobs doesn't appear to help:

| >>> list(csv.reader([s], escapechar='\\'))[0]
['123', 'a,b,c""', '5.640']
| >>> list(csv.reader([s], escapechar='\\', doublequote=False))[0]
['123', 'a,b,c""', '5.640']

Looks like a bug to me; AFAICT from the docs, the last attempt should
have worked.

Cheers,
John



From insyte at gmail.com  Tue Nov 14 17:27:58 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 14 Nov 2006 14:27:58 -0800
Subject: __cmp__ between dissimilar objects
In-Reply-To: <mailman.168.1163532902.32031.python-list@python.org>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<mailman.112.1163471381.32031.python-list@python.org>
	<1163522471.707278.178600@e3g2000cwe.googlegroups.com>
	<mailman.168.1163532902.32031.python-list@python.org>
Message-ID: <1163543278.649502.191640@k70g2000cwa.googlegroups.com>

> >Can you point me to a description of this algorithm?  It doesn't seem
> >to be described in the documentation for the rich comparison or __cmp__
> >methods...
>
> PEP 207
> http://www.python.org/dev/peps/pep-0207/

So since I implemented __cmp__ instead of the rich comparison
operators, Python first tried to reverse the comparison.  This gave
datetime the opportunity to throw TypeError *before* the interpreter
failed over to trying __cmp__.

Is that correct?

Thanks!

-Ben



From kay.schluehr at gmx.net  Tue Nov 21 03:14:35 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 21 Nov 2006 00:14:35 -0800
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
	<1164061431.581363.156430@m73g2000cwd.googlegroups.com>
Message-ID: <1164096875.184919.285600@m7g2000cwm.googlegroups.com>

Klaas wrote:
> Mathias Panzenboeck wrote:
>
> > It's like the . operator in haskell:
> >
> > fchain(f,g,h) is the same like lambda *args,**kwargs: f(g(h(*args,**kwargs)))
>
> I used this once:
>
> composedfun = lambda arg: reduce(lambda x, f: f(x), funcs, arg)
>
> so I can see the potential need (it is not terribly obvious in short-
> or long- form).
>
> If this belongs anywhere, though, it is functools, not itertools.
>
> -Mike

Since you are going to exploit the universality of fold [1] here. Maybe
we should also take the next step beyond itertools ( i.e.
generatortools ) into account?

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498264

Of course I've nothing against a nice interface for the most convenient
usecases just like the proposed isum that could be expressed by
greduce. 

[1] http://www.cs.nott.ac.uk/~gmh/fold.pdf



From eduardo.padoan at gmail.com  Fri Nov 10 08:29:37 2006
From: eduardo.padoan at gmail.com (eduardo.padoan at gmail.com)
Date: 10 Nov 2006 05:29:37 -0800
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163165377.860904.58200@e3g2000cwe.googlegroups.com>


gavino wrote:
> both are interpreted oo langauges......

How are LANs (http://en.wikipedia.org/wiki/LAN) and porns stars
(http://en.wikipedia.org/wiki/Gauge_%28porn_star%29) related to Java,
Python, Programming paradigms and trolls? ask Gavino!



From Bulkan at gmail.com  Wed Nov  8 00:42:31 2006
From: Bulkan at gmail.com (placid)
Date: 7 Nov 2006 21:42:31 -0800
Subject: Python memory usage
Message-ID: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>

Hi All,

Just wondering when i run the following code;

for i in range(1000000):
     print i

the memory usage of Python spikes and when the range(..) block finishes
execution the memory usage does not drop down. Is there a way of
freeing this memory that range(..) allocated?

I found this document but the fix seems too complicated.

http://www.python.org/pycon/2005/papers/79/python-memory.pdf

Cheers



From tim at tdw.net  Thu Nov 23 06:35:28 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 23 Nov 2006 11:35:28 +0000
Subject: "10, 20, 30" to [10, 20, 30]
In-Reply-To: <G58379679.47.1334.1@mxextra>
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
	<G58379679.47.1334.1@mxextra>
Message-ID: <9afea2ac0611230335r7c987fcdw9918ef55746afe96@mail.gmail.com>

On 23/11/06, Steven D'Aprano <steve at remove.this.cybersource.com.au> wrote:
> On Thu, 23 Nov 2006 03:13:10 -0800, Daniel Austria wrote:
>
> > Sorry,
> >
> > how can i convert a string like "10, 20, 30" to a list [10, 20, 30]
> >
> > what i can do is:
> >
> > s = "10, 20, 30"
> > tmp = '[' + s + ']'
> > l = eval(tmp)
> >
> > but in my opinion this is not a nice solution
>
>
> It is a dangerous solution if your data is coming from an untrusted source.
>
> >>> s = "10, 20, 30"
> >>> L = [x.strip() for x in s.split(',')]
> >>> L
> ['10', '20', '30']
> >>> L = [int(x) for x in L]
> >>> L
> [10, 20, 30]
>
> Or, as a one liner:  [int(x.strip()) for x in s.split(',')]

You don't need the strip()

>>> int('    10     ')
10
>>>

:)


From larsnostdal at gmail.com  Thu Nov  2 00:08:00 2006
From: larsnostdal at gmail.com (=?iso-8859-1?q?Lars_Rune_N=F8stdal?=)
Date: Thu, 02 Nov 2006 06:08:00 +0100
Subject: logo design
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
	<1162432978.995731.291980@f16g2000cwb.googlegroups.com>
	<oWd2h.120$Rj2.118@newsfe10.lga>
	<1162442892.041281.321270@i42g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.02.05.07.58.393443@gmail.com>

On Wed, 01 Nov 2006 20:48:12 -0800, Geoffrey Summerhayes wrote:

> Picture this: Hey, I'm switching to COBOL because its new
> logo looks great on t-shirts and mugs.

Maybe the extra funding would improve "COBOL" and its libraries faster by
letting a developer work more often on it.

I'm not totally serious; but maybe some way of donating money to further
improvement of SBCL/Slime/something-cool-and-universally-needed-here would
be OK or something.

..I need a new t-shirt anyways; the Ubuntu t-shirt has gone missing.. :(

-- 
Lars Rune N?stdal
http://lars.nostdal.org/



From B.Ogryczak at gmail.com  Wed Nov 29 12:09:21 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 29 Nov 2006 09:09:21 -0800
Subject: pickle and infinity
Message-ID: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>

Hello,
I?ve got this problem with pickle, it seems it doesn?t handle
correctly infinite values (nor does Python return overflow/underflow
error). What could I do about it? Example code:

>>> x = 1e310 #actually it would be a result of calculations
>>> type(x)
<type 'float'>
>>> x
1.#INF
>>> import pickle
>>> pickle.loads(pickle.dumps(x))
[...]
ValueError: invalid literal for float(): 1.#INF



From fredrik at pythonware.com  Thu Nov 16 05:02:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:02:25 +0100
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <455c2773$1@news.unimelb.edu.au>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>	<455b978c$1@news.unimelb.edu.au>	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<455c2773$1@news.unimelb.edu.au>
Message-ID: <ejhcvh$est$2@sea.gmane.org>

Maurice LING wrote:

> I admit that it is very very unlikely. I guess it is just a wild dream 
> of mine to run Java bytecodes and Python bytecodes on Python VM. I do 
> have a wild vision that we can import java libraries (as jar files) into 
> CPython.

http://sourceforge.net/projects/jpype

</F>



From Roberto.Bonvallet at cern.ch  Wed Nov 29 10:22:57 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 29 Nov 2006 15:22:57 +0000 (UTC)
Subject: trouble writing results to files
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
Message-ID: <ekk8kh$4lo$2@cernne03.cern.ch>

lisa.engblom at gmail.com wrote:
> import csv
> output = csv.writer(open('/Python25/working/output.csv', 'a'))
> a = ["apple", "cranberry", "tart"]
> for elem in range(len(a)):
>    output.writerow(a[elem])

output.writerow expects a sequence as an argument.  You are passing a
string, which is a sequence of characters.  By the way, what output are you
expecting to get?  Do you want a file with only one line (apple,
cranberry, tart), or each fruit in a different line?

BTW, iterating over range(len(a)) is an anti-pattern in Python.  You should
do it like this:

    for item in a:
	output.writerow([item])

> Second, there is a significant delay (5-10 minutes) between when the
> program finishes running and when the text actually appears in the
> file.

Try closing the file explicitly.
Cheers,
-- 
Roberto Bonvallet


From tinodb at gmail.com  Mon Nov 13 17:05:20 2006
From: tinodb at gmail.com (TiNo)
Date: Mon, 13 Nov 2006 23:05:20 +0100
Subject: Is python for me?
In-Reply-To: <1163447345.986774.289950@h54g2000cwb.googlegroups.com>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
	<mailman.78.1163442868.32031.python-list@python.org>
	<1163447345.986774.289950@h54g2000cwb.googlegroups.com>
Message-ID: <435b46e50611131405i22e2d2a6n2203a8282ad62944@mail.gmail.com>

>
> At least: i use the dutch portal http://python.startpagina.nl/ to start
> with. Can you advice me a good Python interpreter, or a good startpage
> (as in Python for dummys)?
>
> Lennart
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

check http://www.diveintopython.org/
pretty good book on all the basics, and it's freely available online.
for interpreters, try out SPE http://stani.be/python/spe/blog/ , it is
free, and has some nice features.
And see: http://spyced.blogspot.com/2006/02/pycon-python-ide-review.html
for a comparison of 4 ide's (including SPE)


From danielkleinad at gmail.com  Thu Nov 16 10:45:54 2006
From: danielkleinad at gmail.com (Daniel Klein)
Date: Thu, 16 Nov 2006 15:45:54 GMT
Subject: Will subprocess eventually deprecate popen2 ?
Message-ID: <uk1pl2tese9uuoelkmoj18bc438amplo6b@4ax.com>

I have a few Python programs that use popen2, and they work quite
nicely and dependably, so I don't really have any reason to change
them to use the new subprocess module...unless of course there any
future plans to deprecate popen2.

Is this something I will have to plan for ?


From fredrik at pythonware.com  Wed Nov 29 10:56:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 16:56:11 +0100
Subject: Asyncore Medusa Example
In-Reply-To: <456D5FBA.2010909@contrado.com.au>
References: <456D5FBA.2010909@contrado.com.au>
Message-ID: <ekkair$5re$1@sea.gmane.org>

Graeme Matthew wrote:

> does anyone know where you can find examples of how to write a native 
> python webserver, I have looked at medusa and asyncore but there are no 
> real examples and the doco is very light

medusa *is* a web server based on asyncore, so you should be able to use 
it more or less as is.

for an overview of asyncore, see:

http://effbot.org/librarybook/asyncore.htm (basics, http client example)
http://effbot.org/librarybook/asynchat.htm (http server example)

</F>



From bernhard.voigt at gmail.com  Tue Nov  7 11:47:59 2006
From: bernhard.voigt at gmail.com (bernhard.voigt at gmail.com)
Date: 7 Nov 2006 08:47:59 -0800
Subject: Plot pkg - Multiple Y axes?
In-Reply-To: <eipnff$2l2$1@gemini.csx.cam.ac.uk>
References: <1162836527.115500.46420@i42g2000cwa.googlegroups.com>
	<eipnff$2l2$1@gemini.csx.cam.ac.uk>
Message-ID: <1162918079.096658.188750@e3g2000cwe.googlegroups.com>

You can try matplotlib. It allows multiple plots in one window. To get
the correct rendering of the axis layout needs probably some handwork,
but it should be possible. Two axis are not a problem at all. Got
through the examples and take a look at the wiki cookbook.
All is available at http://matplotlib.sourceforge.net/

Cheers! Bernhard



From fredrik at pythonware.com  Fri Nov 24 09:39:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 15:39:29 +0100
Subject: Abelson and Python
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com><1164246961.951287.132170@j44g2000cwa.googlegroups.com><mailman.625.1164269712.32031.python-list@python.org><1164281565.180846.232360@k70g2000cwa.googlegroups.com><4565c7f6$1@nntp0.pdx.net>
	<4866bea60611240556p4d9b3a85hd2a19ecf1cf2d2d6@mail.gmail.com>
Message-ID: <ek7071$kkk$1@sea.gmane.org>

Chris Mellon wrote;

> Now, writing a compiler/interpreter from the ground up is a more
> valuable experience, but does it really matter if the language is the
> same one you wrote the compiler in? It gets harder the more
> complicated the syntax and semantics of the language are, but, say,
> python 1.0 would probably be a suitable goal for coursework.

I'd pick mini-python plus basic classes:

    http://hetland.org/python/mini-python.php

</F> 





From fredrik at pythonware.com  Thu Nov 16 09:17:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 15:17:02 +0100
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org><455C1887.6060602@web.de><1163671192.876928.35960@f16g2000cwb.googlegroups.com><mailman.235.1163672112.32031.python-list@python.org>
	<1163674026.032623.151600@e3g2000cwe.googlegroups.com>
Message-ID: <ejhrt1$4j0$1@sea.gmane.org>

Paul Boddie wrote:

>> It's not very difficult, really; especially if you, as Stefan said,
>> think in infoset terms rather "a sequence of little piggies" terms.
>
> Are piggies part of the infoset too? Does the Piggie class represent a
> piggie from the infoset plus a stretch of the road to the market? ;-)

no, they just appear in serialized XML.  if you want concrete piggies, you have
to wrap ET's iterparse function, or perhaps the XMLParser class.

</F> 





From ms at cerenity.org  Fri Nov 17 19:43:46 2006
From: ms at cerenity.org (Michael)
Date: Sat, 18 Nov 2006 00:43:46 +0000
Subject: Why does this code crash python?
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
Message-ID: <455e56b9$0$8727$ed2619ec@ptn-nntp-reader02.plus.net>

The reason for your problem is that, at it's core, it's not threadsafe - you
have a shared data value that 2 distinct things are trying to update.

Mythmon at gmail.com wrote:
...
> from threading import Thread

The following value is updated by 2 things trying to run in parallel.

> c = Console.getconsole()

The following value is used for communications.

> turn = 0


> class timer (Thread):
>     def run ( self ):
>         global turn
....
>         go = True
>         while go:
>             newTime = time.time()
>             timeLeft[turn] -= newTime - oldTime[turn]
>             oldTime[turn] = newTime

value that "turn" relates to here is merely read. On the surface this looks
safe, but if turn changes in value between any of these 3 "reads" of the
value of "turn", then it will go wrong.

>             c.text(3,3,minutes[0] + ':' + seconds[0])
>             c.text(12,3,minutes[1] + ':' + seconds[1])

c gets updated here.

> class eventMonitor (Thread):
>     def run ( self ):
>         global turn

Shared data, but this is the only writer to this value.

>         go = True
>         while go:
>             event = c.peek()
>             if event != None:
>                 c.get()
... (turn gets updated here as well, which can cause a race hazard in timer) 
>                     c.text(10,20,'1')

c effectively changes in value here as well.

> timer().start()
> eventMonitor().start()

Now you *could* introduce locks into this if you wanted. The alternative
approach is to recognise that the real reason you're hitting problems is
because you're using shared data, and that an alternative is to send
messages between the things you're using.

ie collect events from the keyboard, 
   send them to something handling the logic, 
   have that send a message (as you essentially do with "turn" above) to the
     timer logic,
   and then have that send a message to the display.

That way, since you have explicit hand off of data you don't run the risk of
your code crashing. (you also avoid a few other classes of problems :)

The way this would work with Kamaelia (given I've just posted elsewhere in
the thread about that) is you could build a simple pipeline as follows:

Pipeline( KeyEvent(key_events = { pygame.K_SPACE: ("SPACE", "outbox")} ),
          ChessTurnLogic(),
          TimerLogic(),
          Ticker(background_colour=(128,48,128),
                 render_left = 1,
                 render_top = 1,
                 render_right = 600,
                 render_bottom = 200,
                 position = (100, 300),
          )
).run()

This uses pygame for the display instead of the console which you're using.
It takes keypresses and turns them into a message to trigger the chess turn
logic to emit whose turn it is.

This then feeds into somethin that manages the timer logic - which in this
case emits a message (to be displayed by the ticker) about whose just
finished their turn, and how much time they spent on their turn.

KeyEvent and Ticker are pre-existing components. 

The ChessTurnLogic looks like this:

class ChessTurnLogic(Axon.Component.component):
   def main(self):
       myturn, notmyturn = "white", "black"
       self.send(myturn, "outbox")
       while 1:
           while self.dataReady("inbox"):
               self.recv("inbox")
               myturn, notmyturn = notmyturn, myturn
               self.send(myturn, "outbox")
           if not self.anyReady():
               self.pause()
           yield 1


The Timer Logic looks like this:

class TimerLogic(Axon.Component.component):
    def main(self):
        times_info = {}
        player = None
        while 1:
           while self.dataReady("inbox"):
               new_player = self.recv("inbox")
               now = time.time()

               if player is not None:
                  (total, last) = times_info[player]
                  total = total + (now - last)
                  times_info[player] = (total, now)
                  self.send(player + " " + str(total) + "\n\n", "outbox")

               player = new_player
               try:
                  (total, last) = times_info[player]
                  times_info[player] = (total, now)
               except KeyError:
                  times_info[player] = (0, now)

           if not self.anyReady():
              self.pause()

           yield 1

There's probably shorter ways of dealing with the timer logic, but it'll
also work for a draughts (checkers) logic component:

class DraughtsTurnLogic(Axon.Component.component):
   def main(self):
       myturn, notmyturn = "black", "white"
       self.send(myturn, "outbox")
       while 1:
           while self.dataReady("inbox"):
               self.recv("inbox")
               myturn, notmyturn = notmyturn, myturn
               self.send(myturn, "outbox")
           if not self.anyReady():
               self.pause()
           yield 1

Or indeed a game where there are more than 2 players. (Which is a nice
sideeffect of decoupling your code like this)

The full thing including imports looks like this for reference:

#!/usr/bin/python

import Axon
import time
import pygame
from Kamaelia.Chassis.Pipeline import Pipeline
from Kamaelia.UI.Pygame.Ticker import Ticker
from Kamaelia.UI.Pygame.KeyEvent import KeyEvent

class ChessTurnLogic(Axon.Component.component):
   def main(self):
       myturn, notmyturn = "white", "black"
       self.send(myturn, "outbox")
       while 1:
           while self.dataReady("inbox"):
               self.recv("inbox")
               myturn, notmyturn = notmyturn, myturn
               self.send(myturn, "outbox")
           if not self.anyReady():
               self.pause()
           yield 1

class TimerLogic(Axon.Component.component):
    def main(self):
        times_info = {}
        player = None
        while 1:
           while self.dataReady("inbox"):
               new_player = self.recv("inbox")
               now = time.time()

               if player is not None:
                  (total, last) = times_info[player]
                  total = total + (now - last)
                  times_info[player] = (total, now)
                  self.send(player + " " + str(total) + "\n\n", "outbox")

               player = new_player
               try:
                  (total, last) = times_info[player]
                  times_info[player] = (total, now)
               except KeyError:
                  times_info[player] = (0, now)

           if not self.anyReady():
              self.pause()

           yield 1

Pipeline( KeyEvent(key_events = { pygame.K_SPACE: ("SPACE", "outbox")} ),
          ChessTurnLogic(),
          TimerLogic(),
          Ticker(background_colour=(128,48,128),
                 render_left = 1,
                 render_top = 1,
                 render_right = 600,
                 render_bottom = 200,
                 position = (100, 300),
          )
).run()

(I've tested the above code BTW. It's not pretty, but it works :).
 Prettiness could be added in all sorts of ways though :-)


Regards,


Michael.
--
Kamaelia Project Lead/Dust Puppy
http://kamaelia.sourceforge.net/Home
http://yeoldeclue.com/blog







From john at castleamber.com  Wed Nov 15 17:58:55 2006
From: john at castleamber.com (John Bokma)
Date: 15 Nov 2006 22:58:55 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
Message-ID: <Xns987CACBEFEFDCcastleamber@130.133.1.4>

Harry George <harry.g.george at boeing.com> wrote:
 
> Short answer: People use Python instead of Java because people (at
> least intelligent people) tend to avoid pain.

Intelligent people don't suffer from fanboy sentiments. They just pick a 
language that works best for them.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From timr at probo.com  Thu Nov 30 03:21:34 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 30 Nov 2006 08:21:34 GMT
Subject: Python Question About Compiling.
References: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
	<mailman.869.1164862944.32031.python-list@python.org>
Message-ID: <t05tm2pvmg6551e05s8nb8v3lkcl75dokv@4ax.com>

"Scheol Service" <scheols at gmail.com> wrote:
>
>Im just unsure on how to compile python code into .exe executionable
>files.  Is there a simple way to do this?

Sort of.  Python code is not compiled to machine language.  Instead, it is
compiled to an intermediate language that is then interpreted.  That means
that, at run-time, there must be an interpreter available.

However, there are several packages that will gather up a copy of the
interpreter, your script, and whatever scripts and libraries it might need,
and pack them all into a .exe.  To the end user, it looks like a compiled
program.  py2exe is one example.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From fredrik at pythonware.com  Wed Nov 15 12:40:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 18:40:08 +0100
Subject: modules and generated code
In-Reply-To: <455B4F66.9000408@wiggly.org>
References: <mailman.146.1163514956.32031.python-list@python.org>	<ejckue$ns2$01$1@news.t-online.com>	<mailman.150.1163517249.32031.python-list@python.org>	<ejcq59$920$00$1@news.t-online.com>	<mailman.163.1163526017.32031.python-list@python.org>	<ejfhqf$189$1@aioe.server.aioe.org>
	<455B4F66.9000408@wiggly.org>
Message-ID: <ejfjdo$2e1$2@sea.gmane.org>

Nigel Rantor wrote:

> Basically, I want the same top-level package to have bits of code in 
> different directories, but because Python requires the __init__.py file 
> it only picks up the first one in PYTHONPATH.

would a single __init__.py function that does from-import-* on the 
various implementation modules solve your problem?

</F>



From sjmachin at lexicon.net  Sat Nov 18 03:09:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 00:09:59 -0800
Subject: How can I speed this function up?
In-Reply-To: <mailman.403.1163827435.32031.python-list@python.org>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<mailman.403.1163827435.32031.python-list@python.org>
Message-ID: <1163837399.869267.20010@m73g2000cwd.googlegroups.com>



On Nov 18, 4:23 pm, Gabriel Genellina <gagsl... at yahoo.com.ar> wrote:

> If you can assume that all items have 6 numbers, it appears best to
> unroll the inner iteration.

Is this meant to be some kind of joke?
If so, you should have festooned it with smilies.
If not, please proceed straight to http://www.thedailyWTF.com and
nominate yourself.



From sjmachin at lexicon.net  Wed Nov 29 13:43:57 2006
From: sjmachin at lexicon.net (John Machin)
Date: 29 Nov 2006 10:43:57 -0800
Subject: Detecting recursion loops
In-Reply-To: <ekkj14$im2$2@news.albasani.net>
References: <ekk6qu$po0$1@news.albasani.net>
	<1164815293.529674.109850@l39g2000cwd.googlegroups.com>
	<ekkj14$im2$2@news.albasani.net>
Message-ID: <1164825837.804590.96440@h54g2000cwb.googlegroups.com>


robert wrote:
>
> the "bug" comes in from the I/O input.
>

Have you considered checking your input for valid values?

Cheers,
John



From diesch at spamfence.net  Sat Nov  4 13:08:12 2006
From: diesch at spamfence.net (Florian Diesch)
Date: Sat, 04 Nov 2006 19:08:12 +0100
Subject: Python tools for managing static websites?
References: <mailman.1542.1162296580.11739.python-list@python.org>
Message-ID: <20061104180812.14AC.0.NOFFLE@dieschf.news.arcor.de>

"Chris Pearl" <chrispearl at gmail.com> wrote:

> Are there Python tools to help webmasters manage static websites?
>
> I'm talking about regenerating an entire static website - all the HTML
> files in their appropriate directories and sub-directories. Each page
> has some fixed parts (navigation menu, header, footer) and some
> changing parts (body content, though in specific cases the normally
> fixed parts might change as well). The tool should help to keep site
> editing DRY every piece of data, including the recurring parts, should
> exist only once.


Tahchee <http://www.ivy.fr/tahchee> 

SUMMARY     = "Automated static and dynamic web site creation tool"             
DESCRIPTION = """\                                                              
Tahchee is a tool for developers and Web designers that makes it possible to    
easily build a static Web site using the Cheetah template system. It is used to 
fill in the gap between bare template and macro processing system and dynamic   
template-based Web sites. It acts both as a build system (? la "make") as well  
as an extension to the Cheetah template that makes it really easy to build small
to medium-sized sites. It is ideal for writing open source project or small     
company Web sites.\                                                             
"""  



   Florian
-- 
<http://www.florian-diesch.de/>


From fredrik at pythonware.com  Thu Nov 16 03:05:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 09:05:18 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <455C1887.6060602@web.de>
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
Message-ID: <ejh63u$pcu$1@sea.gmane.org>

Stefan Behnel wrote:

> If you want to copy part of of removed element back into the tree, feel free
> to do so.

and that can of course be done with a short helper function.

when removing elements from trees, I often set the tag for those 
elements to some "garbage" value during processing, and then call 
something like

http://effbot.org/zone/element-bits-and-pieces.htm#cleanup

to clean things up before serializing the tree.

</F>



From gabor at nekomancer.net  Fri Nov 17 05:26:51 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 11:26:51 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <ejjtd1$8gp$1@upsn250.cri.u-psud.fr>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<ejjtd1$8gp$1@upsn250.cri.u-psud.fr>
Message-ID: <8618c$455d8e6c$59ad1aca$3681@news.flashnewsgroups.com>

Laurent Pointal wrote:
Laurent Pointal wrote:
> gabor a ?crit :
>> hi,
>>
>> from the documentation (http://docs.python.org/lib/os-file-dir.html) for
>> os.listdir:
>>
>> "On Windows NT/2k/XP and Unix, if path is a Unicode object, the result
>> will be a list of Unicode objects."
> 
> Maybe, for each filename, you can test if it is an unicode string, and
> if not, convert it to unicode using the encoding indicated by
> sys.getfilesystemencoding().
> 
> Have a try.
> 
> A+
> 
> Laurent.

> gabor a ?crit :
>> hi,
>>
>> from the documentation (http://docs.python.org/lib/os-file-dir.html) for
>> os.listdir:
>>
>> "On Windows NT/2k/XP and Unix, if path is a Unicode object, the result
>> will be a list of Unicode objects."
> 
> Maybe, for each filename, you can test if it is an unicode string, and
> if not, convert it to unicode using the encoding indicated by
> sys.getfilesystemencoding().
> 
i don't think it would work. because os.listdir already tried, and 
failed (that's why we got a byte-string and not an unicode-string)

gabor


From john106henry at hotmail.com  Mon Nov 27 15:36:23 2006
From: john106henry at hotmail.com (John Henry)
Date: 27 Nov 2006 12:36:23 -0800
Subject: case insensitive dictionary
In-Reply-To: <ekff9e$36l$1@aioe.server.aioe.org>
References: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>
	<ekff9e$36l$1@aioe.server.aioe.org>
Message-ID: <1164659783.440414.282030@h54g2000cwb.googlegroups.com>

I believe that if you redefine the value, the key should not change.
So, yes, I would expect that they value of the key to remain as they
were.


J. Clifford Dyer wrote:
> John Henry wrote:
> >    print pets.keys()
> >
> > should print:
> >
> > "Cat", "Dog"
>
> If you do:
>
> Py> pets['Cat'] = 2
> Py> pets['Dog'] = 3
> Py> pets['DOG'] = 4
> Py> pets['cat'] += 5
> Py> pets.keys()
>
> What should the result be?
>
> "['Cat', 'Dog']" or "['cat', 'DOG']"?
>
>
> That is to say, if you use a new case in redefining the values of your
> case insensitive dictionary, does the key take on the new case, or will
> it always and forever be the case originally given to it?
> 
> Cheers,
> Cliff



From amitsoni.1984 at gmail.com  Wed Nov  8 02:36:18 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 7 Nov 2006 23:36:18 -0800
Subject: assigning a sequence to an array
Message-ID: <1162971378.536088.35590@m73g2000cwd.googlegroups.com>

Hi,
I am using  "A[a,:]=row" in python, where A is a matrix and row is a
sequence. But it gives following error:
-------- error------
    A[a,:]=row
ValueError: setting an array element with a sequence.

Is there a way to change type of sequence to array so that this
situation could be handled

thanks
Amit



From steve at holdenweb.com  Thu Nov 16 05:46:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 10:46:45 +0000
Subject: Python v PHP: fair comparison?
In-Reply-To: <2006111523045616807-jameshcunningham@gmailcom>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>	<455baf21$0$28561$426a74cc@news.free.fr>	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
Message-ID: <ejhfg9$lna$3@sea.gmane.org>

James Cunningham wrote:
> On 2006-11-15 20:59:26 -0500, "walterbyrd" <walterbyrd at iname.com> said:
> 
>> Bruno Desthuilliers wrote:
>>> walterbyrd a ?crit :
>>> You mean there are web hosting companies that are still using Apache
>>> 1.3.x ?
>>>
>> Practically all web-hosters still use Apache 1.3.x. Certainly all of
>> the lower priced hosters.
> 
> Not true. Dreamhost, at least, uses Apache 2.

So you thin a single counter-example disproves an assertion that begins 
with "practically all"?

>>> C'mon, let's be serious. I just ordered a dedibox - a small dedicated
>>> web server - for my personal use. It's only 30 euros a month, you know...
>> What if I only need 25mb of space? I can that with a PHP hoster for $10
>> a year. That is about 1/36th the price that you posting about.
>>
>> Maybe you don't mind paying 30 euros a month, but a lot others do.
> 
> Of course, you can't get $10 a year plans on Dreamhost. But with deals 
> you can get it down to about that low, at least for the first year. I 
> suppose I'm lucky enough not to miss $8 a month otherwise.
> 
regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From eurleif at ecritters.biz  Sun Nov 12 17:38:53 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 12 Nov 2006 17:38:53 -0500
Subject: Random image text generation?
In-Reply-To: <pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
Message-ID: <4557a186$0$5806$4d3efbfe@news.sover.net>

Steven D'Aprano wrote:
> For a text only solution, consider putting up a natural language question
> such as:
> 
> What is the third letter of 'national'?
> What is four plus two?
> How many eggs in a dozen?
> Fill in the blank: Mary had a little ____ its fleece was white as snow.
> Cat, Dog, Apple, Bird. One of those words is a fruit. Which one?

That wouldn't work as a true CAPTCHA (Completely Automated *Public* 
Turing test to tell Computers and Humans Apart), since making the list 
of questions and answers public would defeat its purpose.


From shea at void.nil  Tue Nov  7 22:59:25 2006
From: shea at void.nil (Shea Martin)
Date: Wed, 08 Nov 2006 03:59:25 GMT
Subject: no ptyhon curses module on solaris?
In-Reply-To: <5cb4h.60189$H7.4783@edtnps82>
References: <5cb4h.60189$H7.4783@edtnps82>
Message-ID: <xCc4h.60216$H7.5491@edtnps82>

Shea Martin wrote:
> I just installed active python, and I get this error:
> 
> % python
> ActivePython 2.4.3 Build 11 (ActiveState Software Inc.) based on
> Python 2.4.3 (#1, Apr  3 2006, 18:34:02) [C] on sunos5
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import curses
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/lib/python2.4/curses/__init__.py", line 15, in ?
>     from _curses import *
> ImportError: No module named _curses
> 
> Any ideas why?  I have libncurses 5.2 on my machine.
> 
> Thanks

For some reason the package was not linked against ncurses in the 
Solaris version.  I ended up just building Python from source.

~S


From bborcic at gmail.com  Thu Nov 16 05:55:18 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Thu, 16 Nov 2006 11:55:18 +0100
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <Xns987D660A93E5castleamber@130.133.1.4>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
	<pan.2006.11.16.03.30.28.643676@REMOVEME.cybersource.com.au>
	<Xns987D660A93E5castleamber@130.133.1.4>
Message-ID: <455c43c5$1_1@news.bluewin.ch>

John Bokma wrote:

>> Seriously though, there is no contradiction between the idea of
>> "people use Python instead of Java because they prefer to avoid pain"
> 
> It sounds like a typical fanboy statement to me, since it implies that 
> Java is always a pain, and Python is perfect. 

That inference requires as preliminary convention, some clear contrafactual like 
"everybody uses Python and nobody uses Java".

IMO, this is a form of assumption that is only legitimate in the purpose of 
reaching agreement; while the OP's statement can be read as "those people who 
use Python instead of Java do it because..." without recourse to a similar 
assumption - what escapes your criticism.

Cheers, BB


From bj_666 at gmx.net  Fri Nov 17 04:08:27 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 17 Nov 2006 10:08:27 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
Message-ID: <pan.2006.11.17.09.08.26.255202@gmx.net>

In <mailman.294.1163721712.32031.python-list at python.org>, Jean-Paul
Calderone wrote:

>>How would you propose listdir should behave?
> 
> Umm, just a wild guess, but how about raising an exception which includes
> the name of the file which could not be decoded?

Suppose you have a directory with just some files having a name that can't
be decoded with the file system encoding.  So `listdir()` fails at this
point and raises an exception.  How would you get the names then? Even the
ones that *can* be decoded?  This doesn't look very nice:

path = u'some path'
try:
    files = os.listdir(path)
except UnicodeError, e:
    files = os.listdir(path.encode(sys.getfilesystemencoding()))
    # Decode and filter the list "manually" here.

Ciao,
	Marc 'BlackJack' Rintsch


From bronger at physik.rwth-aachen.de  Wed Nov 22 01:45:18 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 22 Nov 2006 07:45:18 +0100
Subject: ANN: PyVISA 1.1 -- GPIB, USB, RS232 instrument control
Message-ID: <mailman.591.1164206744.32031.python-announce-list@python.org>

Hall?chen!

At http://pyvisa.sourceforge.net you can find information about the
PyVISA package.  It realises Python bindings for the VISA library
functions, which enables you to control GPIB, USB, and RS232-serial
measurement devices via Python.

Yesterday I released version 1.1, which works much better together
with older VISA implementations.  Moreover, we finally have reports
from Linux users.  They successfully used PyVISA with Linux +
NI/Tektronix GPIB hardware.

Tsch?,
Torsten.

F'up to comp.lang.python
-- 
Torsten Bronger, aquisgrana, europa vetus
                                                    ICQ 264-296-646
                   (See http://ime.webhop.org for Jabber, MSN, etc.)


From nick at craig-wood.com  Fri Nov 10 09:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 10 Nov 2006 08:30:04 -0600
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
	<45536639$0$23587$426a34cc@news.free.fr>
Message-ID: <slrnel8vqf.44t.nick@irishsea.home.craig-wood.com>

Christophe <chris.cavalaria at free.fr> wrote:
>  ( and I must admit one of the reasons I avoid wx if possible, is because 
>  I don't use Gnome under Linux and the look and feel of wx applications 
>  is really horrible under KDE )

If you install the QT theme for GTK it all starts to look a lot nicer

Eg debian

ii  gtk2-engines-gtk-qt 0.7-1 theme engine using Qt for GTK+ 2.x

You get a control panel for GTK apps in the KDE control center also.

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


From thomas.ploch at gmx.net  Fri Nov 17 07:02:20 2006
From: thomas.ploch at gmx.net (Thomas Ploch)
Date: Fri, 17 Nov 2006 13:02:20 +0100
Subject: Understanding Python Source Code - where to start?
Message-ID: <20061117120220.162900@gmx.net>

Hello folks,
 
I am thinking about reading and understanding the Source Code of Python, but where would it be best to start? Possibly someone can give me a little hint. I am getting into socketmodule.c a little bit at the moment, but thats not what I want.
 
Greetz, Thomas
-- 
Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! 
Ideal f?r Modem und ISDN: http://www.gmx.net/de/go/smartsurfer


From rtw at freenet.co.uk  Mon Nov 20 10:50:09 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 20 Nov 2006 09:50:09 -0600
Subject: GUI Design using BOA Constructor
References: <mailman.505.1164035498.32031.python-list@python.org>
Message-ID: <Xns9881A0DAA818FrtwfreenetREMOVEcouk@216.196.109.145>

amit saha wrote in news:mailman.505.1164035498.32031.python-list at python.org 
in comp.lang.python:

> Hi list!
> 
> I was designing a GUI App using BOA Constructor. I have designed the
> User Interface.However I cannot figure out how do i add the event
> handling code to the buttons and other controls

Note the following is from using Boa on Windows, I presume its 
the same on *nix but I've never tried it.

When you are editing your window/frame/dialog, select the item 
you whan to add a handler too,

Then in the left hand pane (the "Inspector") select the events 
("Evts") tab, at the top of this there are 2 lists if you select 
something from the left (say "MouseEvent") you will get a list
on the right of all the events in this category that the control 
can handle, double click on one to add a handler for that event.

Remeber to save you changes by clicking the tick button.

and now an empty event handler should have been added to the end
of the class Boa created for you.

To add menu events you need to be editing the menu in the Data
designer (a tab in the "Editor" panel when in Design mode).

Note that on Windows there is a green help icon on the top row of 
the top panel, this opens a help file with a tutorial which is 
probably worth going through.

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From apardon at forel.vub.ac.be  Wed Nov 29 03:00:48 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 29 Nov 2006 08:00:48 GMT
Subject: Problem with imaplib (weird result if mailbox contains a %)
References: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>
	<1164727244.400677.36150@l12g2000cwl.googlegroups.com>
Message-ID: <slrnemqfhg.al8.apardon@rcpc42.vub.ac.be>

On 2006-11-28, Leo Kislov <Leo.Kislov at gmail.com> wrote:
>
> Antoon Pardon wrote:
>> This little program gives IMO a strange result.
>>
>> import imaplib
>>
>> user = "cpapen"
>>
>> cyr = imaplib.IMAP4("imap.vub.ac.be")
>> cyr.login("cyrus", "cOn-A1r")
>> rc, lst = cyr.list('""', "user/%s/*" % user)
>> for el in lst:
>>   print "%r" % (el,)
>>
>> And the result is:
>>
>> '(\\HasNoChildren) "/" "user/cpapen/Out"'
>> '(\\HasNoChildren) "/" "user/cpapen/Punten"'
>> '(\\HasNoChildren) "/" "user/cpapen/Spam"'
>> '(\\HasNoChildren) "/" "user/cpapen/agoog to be"'
>> '(\\HasNoChildren) "/" "user/cpapen/artistiek &- kunst"'
>> '(\\HasNoChildren) "/" "user/cpapen/copains et copinnes =x="'
>> '(\\HasNoChildren) "/" "user/cpapen/cp &- writing"'
>> '(\\HasNoChildren) "/" "user/cpapen/examen"'
>> '(\\HasNoChildren) "/" "user/cpapen/important info (pass)"'
>> '(\\HasNoChildren) "/" "user/cpapen/lesmateriaal"'
>> '(\\HasNoChildren) "/" "user/cpapen/love &- flesh for fantasy"'
>> '(\\HasNoChildren) "/" "user/cpapen/media"'
>> '(\\HasNoChildren) "/" "user/cpapen/music &- beats"'
>> ('(\\HasNoChildren) "/" {25}', 'user/cpapen/newsletters %')
>> ''
>> '(\\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"'
>> '(\\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"'
>> '(\\HasNoChildren) "/" "user/cpapen/the closest ones to me [x]"'
>> '(\\HasNoChildren) "/" "user/cpapen/vubrations"'
>> '(\\HasNoChildren) "/" "user/cpapen/wm2addressbook"'
>> '(\\HasNoChildren) "/" "user/cpapen/wm2prefs"'
>> '(\\HasNoChildren) "/" "user/cpapen/wm2signature"'
>>
>>
>> What I have a problem with is the 14th and 15th line.
>> All other entries are strings but the 14th is a tuple.
>> and the 15th is an empty string. As far as I can tell
>> every time a "%" is in the mailbox name I get this kind of
>> result.
>>
>> I'm using python 2.3.3 and the imap sytem is Cyrus.
>>
>> Can someone explain what is going one?
>>
>> Is this a bug?
>
> Empty string seems to be a bug. But tuple is by design, read the docs
> and imap rfc. The protocol is convoluted in the first place, and so is
> python interface.

Are there more docs than at http://www.python.org/doc/. I don't find
those very helpfull in explaining this.

I also took a look at rfc 2060 and to be honest I don't find anything
there to explain this difference. I only took a closer look at section
7.2.2. So maybe I should look somewehere else but after reading section
7.2.2. I don't understand why the list method returned a tuple for this
mailbox instead of the following string:

   '(\\HasNoChildren) "/" "user/cpapen/newsletters %"'

>
>> If it is, is it fixed in later versions?
>
> Why don't you try to pull imaplib.py from later versions? I don't think
> it changed that much so it should be compatible with python 2.3

I could take my hands on a 2.4 version and the result was the same.

>> Whether or not it is a bug, can I rely on the mailbox
>> being the last item in the tuple in these cases?
>
> Yes (at least for list command)

Well that is at least comforting.

-- 
Antoon Pardon


From wj at warrenjackson.com  Tue Nov 21 06:45:10 2006
From: wj at warrenjackson.com (Warren Jackson)
Date: Tue, 21 Nov 2006 06:45:10 -0500
Subject: best bet for using a .NET dll
Message-ID: <701043a60611210345l4858aaadt40eae1a17f8dfa74@mail.gmail.com>

I'd like to make a simple program that uses the Canon digital camera
SDK (EDSDK 1.3).  Basically I need to take pictures and download them
to my computer.  They have a fair amount of example code for the .NET
languages, and don't officially support anything else.

The API uses more than the basic c types (references, etc.) that I'm
not totally familiar with yet.  Included at the bottom is an example
of one of the functions.

What is my best bet for writing this in Python? cTypes, IronPython,
something else?  I haven't worked with either before but am currently
reading up.  It seams cTypes has a difficult time dealing with
anything but the 'normal' c types, is this correct?

Would it be easier to just write a program in C# to handle all of the
fancy types? (ie. make a function that opens and closes session, finds
camera, takes picture, downloads picture, saves picture - that can
then be read in python) ?  This isn't a very attractive option to me.

Thanks in advance for any insight.






3.1.24 EdsDownload

Description:
Downloads a file on a remote camera (in the camera memory or on a
memory card) to the host computer. The downloaded file is sent
directly to a file stream created in advance.
When dividing the file being retrieved, call this API repeatedly. Also
in this case, make the data block size a multiple of 512 (bytes),
excluding the final block.

Syntax
EdsError EDSAPI EdsDownload( EdsDirectoryItemRef inDirItemRef,
EdsUInt32 inReadSize,
EdsStreamRef outStreamRef )

Parameters
inDirItemRef
Designate the file object in the camera to download.
inReadSize
Designate the size in bytes to download.
outStreamRef
Specifies the destination stream. The stream for downloading is
created by means of EdsCreateFileStream, EdsCreateMemoryStream, or the
like.

Return Values
Returns EDS_ERR_OK if successful. In other cases, see the EDS Error Lists.


From mountney at hotmail.com  Mon Nov 20 20:20:20 2006
From: mountney at hotmail.com (Tom Mountney)
Date: Mon, 20 Nov 2006 17:20:20 -0800
Subject: Help!!!  New to Python and getting an error I can't figure out
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <AfmdnWrC6r_Fyf_YnZ2dnUVZ_oSdnZ2d@comcast.com>

Thanks to all that gave ideas.
Indeed the error was the missing bracket ("]") off the end of line 25 as
stated by John Machin

And yes the parentheses were also in error as suggested by both Fredrik and
Tim  - I forgot to remove the parens which I tried to see if I got a
different error.

Thanks mucho for all your help - the program now runs!!!!
Tom

"Tom Mountney" <mountney at hotmail.com> wrote in message
news:W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d at comcast.com...
> Any help is greatly appreciated!!!
>
> I'm learning python and from a book I tried this program: (all the
> indentation is there just doen't appear in this EMail)
> ----------------------------------------------------------
>
> #file grep.py
> import os
> from os import isfile
>
> class dirGrep:
>  def __init__(self, directory):
>   self.files = filter(isfile,
>    [os.path.join(directory, x) for x in os.listdir(directory)])
>
>  def findLines(self, pattern, filelist=none):
>   """Accepts pattern, returns lines that contain pattern.
>   Optional 2nd argument is a filelist to search"""
>   if not filelist:
>    filelist = self.files
>   results = []
>   for file in filelist:
>    fo = open(file)
>    results += [x for x in fo.readlines()
>     if x.find(pattern) != -1]
>    fo.close() #explicit close of the file object
>   return results
>
>  def findfiles(self, pattern):
>   "Accepts pattern, returns filenames that contain pattern"
>   return[x for x in self.files if x.find(pattern) != -1
>
> #test
> if __name__ == "__main__":
>  (g = dirGrep("c:\\winnt"))
>  files = g.findFiles(".py")
>  print g.findLines("java", files)
>
> When I try to run the program - python grep.py - I get the following
error:
>
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax
>
> What am I doing wrong?
> Thanks for any help
>
>




From deets at nospam.web.de  Sat Nov 18 06:21:17 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Nov 2006 12:21:17 +0100
Subject: Which one is better for me , SIP or SWIG ?
In-Reply-To: <mailman.340.1163772394.32031.python-list@python.org>
References: <mailman.340.1163772394.32031.python-list@python.org>
Message-ID: <4s88lbFuk843U1@mid.uni-berlin.de>

fdu.xiaojf at gmail.com schrieb:
> Hi all,
> 
> I am going to generate a python wrapper of a C library, and I am 
> wondering which one is a better tool for me, SIP or SWIG ?
> 
> SWIG supports many scripting languages such as python, ruby, and perl, 
> while SIP is specific to python, so I think maybe SIP is more suitable 
> to generate better wrappers(sorry for my ignorance if I am wrong at this 
> point) with python.
> 
> But it seems that SIP is mainly used for pyQT and hasn't gained general 
> acceptance with python community.
> 
> Could someone give me a better comparison of SIP and SWIG ?
> 
> My concerns:
> 
>  1. I just want an python wrapper for C/C++ code. The support of other 
> scripting languages is not important.
> 
>  2. Easy to learn and easy to use.

The reasons SIP hasn't gained more attraction are dark to me. At least 
when it comes to C++, it's support is waaay better than SWIG. There also 
exists some Boost Python stuff, but I never wrapped my head around that.

However, if you are "only" wrapping C, pyrex is my tool of choice. It 
has build-in distutils support, and it is very easy to write. So if you 
can, go with pyrex. If you must wrap C++, go with SIP - boost 
non-withstanding.

Diez


From bignose+hates-spam at benfinney.id.au  Mon Nov  6 23:21:44 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 07 Nov 2006 15:21:44 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <87odrjopif.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Let's say I'm making a game and I have this base class:
>
> class Character(object):
>
>      def __init__(self, name, stats):
>          self.name = name
>          self.strength = stats[0]
>          self.dexterity = stats[1]
>          self.intelligence = stats[2]
>          self.luck = stats[3]
>
> Is this a good way to assign the values to the different attributes?
> Should 'stats' be a list/tuple (like this), or should I do *stats
> instead?

A tuple is fine, but assumes that there is a logical *sequence* to
these values. If that's true, it should be no problem to assign them as:

    class Character(object):
        def __init__(self, name, stats):
            self.name = name
            (self.strength, self.dexterity,
                self.intelligence, self.luck) = stats

    >>> foo = Character("Foo", (10, 11, 9, 10))
    >>> print foo.name, foo.strength, foo.intelligence
    Foo 10 9

In this case, though, I don't see any value in a specific sequence, so
a mapping looks better to me and gives the caller more flexibility in
how to set it up.

    class Character(object):
        stat_keys = ['strength', 'dexterity', 'intelligence', 'luck']
        def __init__(self, name, stats):
            self.name = name
            self.stats = {}
            for (stat_key, stat_value) in [(k, stats[k])
                    for k in self.stat_keys]:
                setattr(self, stat_key, stat_value)

    >>> foo = Character("Foo", dict(
    ...     dexterity = 11, luck = 10,
    ...     strength = 10, intelligence = 9,
    ... ))
    >>> print foo.name, foo.strength, foo.intelligence
    Foo 10 9

> I'm trying to think ahead to when I might want to add new
> attributes

In which case you almost certainly want a mapping, not a sequence.

> and I want to make sure this doesn't get crazy with individual
> parameters instead of just the one list.

This is one of the many reasons why Python's built-in composite types
are so useful. A group of semantically-related values can be passed as
a single composite value.

-- 
 \     "I hope that after I die, people will say of me: 'That guy sure |
  `\                         owed me a lot of money.'"  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From tom at t0mb.net  Sat Nov 18 14:20:49 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 19:20:49 +0000
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118190822.GB19739@phd.pp.ru>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
Message-ID: <455F5D11.8030104@t0mb.net>

Oleg Broytmann wrote:
> On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
>   
>> Could anyone suggest me a simple IDE suitable for teaching Python as a
>> first programming language to high school students
>>     
which operating system would this concern?  IDLE which you might find 
comes with python, or is installable separately is a good bet, one nice 
feature is that when you open up the initial parenthese on a method 
call, it can list the arguments that the method expects.  ipython is 
very good too, it allows tab completion of class methods/attributes and 
the like, which can make navigating your way around a new class 
magnitudes easier.  only the former can really be considered an IDE.  
It'd be great to see them combined somehow.

I personally use pida (http://pida.berlios.de).  It is perhaps not a 
beginners IDE, but it has advantages such as being able to plug in a few 
different editors, some of which are very easy to use.  It has a class 
browser which you can have on a sidebar, integrated docbook support, the 
ability to open python and other types of shell as part of the window,  
syntax checking and more.  It can aid development to no end.


From antroy at gmail.com  Sat Nov 25 08:57:00 2006
From: antroy at gmail.com (Ant)
Date: 25 Nov 2006 05:57:00 -0800
Subject: Invoking Python from Cygwin problem.
In-Reply-To: <pan.2006.11.25.11.14.25.36805@gmx.net>
References: <1164385876.755749.139020@l39g2000cwd.googlegroups.com>
	<pan.2006.11.25.11.14.25.36805@gmx.net>
Message-ID: <1164463020.105673.116550@l12g2000cwl.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
...
> It's a feature.  The `sys.stdout` object remembers if the last ``print``
> ended in a comma (see the `sys.stdout.softspace` attribute) and when the
> interpreter executes its shutdown code and that `softspace` attribute is
> set, an extra '\n' is printed.

So the workaround is to directly write to sys.stdout I guess. Or set
sys.stdout.softspace to 0?

Cheers.



From gagsl-py at yahoo.com.ar  Tue Nov 21 01:50:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 21 Nov 2006 03:50:25 -0300
Subject: Parsing/Splitting Line
In-Reply-To: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061121034713.03f0ce20@yahoo.com.ar>

At Tuesday 21/11/2006 02:59, acatejr at gmail.com wrote:

>I have a text file and each line is a list of values.  The values are
>not delimited, but every four characters is a value.  How do I get
>python to split this kind of data?  Thanks.

 >>> line = "12340001   2  -3"
 >>> for j in range(0,len(line),4):
...   print line[j:j+4], int(line[j:j+4])
...
1234 1234
0001 1
    2 2
   -3 -3
 >>>


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From nogradi at gmail.com  Tue Nov 21 09:33:45 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 21 Nov 2006 15:33:45 +0100
Subject: Vim scripts for editing Python?
In-Reply-To: <45630E41.5080205@tim.thechases.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
	<1164089307.390351.263980@j44g2000cwa.googlegroups.com>
	<1164117947.465994.246510@k70g2000cwa.googlegroups.com>
	<45630E41.5080205@tim.thechases.com>
Message-ID: <5f56302b0611210633h68ca6888vc9f936f8ae066e7d@mail.gmail.com>

> > For example, to auto-fold all function bodies while leaving
> > the function names visible.

Once I wrote a plugin for vim that folds python code:

http://www.vim.org/scripts/script.php?script_id=1494

It will make the docstrings and function names visible.

HTH,
Daniel


From fredrik at pythonware.com  Wed Nov  1 06:55:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 12:55:57 +0100
Subject: Where do nested functions live?
In-Reply-To: <1162380650.448023.201430@e64g2000cwd.googlegroups.com>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>	<mailman.1390.1162022770.11739.python-list@python.org>
	<1162380650.448023.201430@e64g2000cwd.googlegroups.com>
Message-ID: <eia20c$hcq$1@sea.gmane.org>

Carl Banks wrote:

> Not so fast. You can get at the nested function by peeking inside code
> objects (all bets off for Pythons other than CPython).
> 
> import new
> def extract_nested_function(func,name):
>     codetype = type(func.func_code)
>     for obj in func.func_code.co_consts:
>         if isinstance(obj,codetype):
>             if obj.co_name == name:
>                 return new.function(obj,func.func_globals)
>     raise ValueError("function with name %s not found in %r"
>         % (name,func))

that doesn't give you the actual nested function, though; just another 
function object created from the same code object.  and doing this right 
is a bit harder than you make it look; your code fails in somewhat 
confusing ways on straightforward things like:

def outer():
     def inner(arg="hello"):
	print arg
     inner()

extract_nested_function(outer, "inner")()

and

def outer():
     arg = "hello"
     def inner():
	print arg
     inner()

extract_nested_function(outer, "inner")()

</F>



From orsenthil at gmail.com  Mon Nov 13 10:25:57 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 07:25:57 -0800
Subject: httplib.InvalidURL: nonnumeric port: For characters
	intheproxypassword in URL
In-Reply-To: <mailman.59.1163426414.32031.python-list@python.org>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<1163424914.967174.302610@e3g2000cwe.googlegroups.com>
	<mailman.59.1163426414.32031.python-list@python.org>
Message-ID: <1163431557.397172.175850@f16g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
>
> can you post the code you're using to build the URI ?
>
Okay. This piece of code fetches a page from a particular site. As I am
behind a firewall, I have to communicate through a proxy.

# Set the Proxy Address
PROXY_IP = "10.1.9.4:80"

# Trying with linear way

proxy_user = 'user_name'
proxy_password_orig='|\/|pc'
proxy_password = urllib.quote(proxy_password_orig)

#proxy_password = r'|\/|pr0c'

# Setup the Proxy with urllib2

proxy_url = 'http://' + proxy_user + ':' + proxy_password + '@' +
PROXY_IP

proxy_support = urllib2.ProxyHandler({"http":proxy_url})
opener = urllib2.build_opener(proxy_support,urllib2.HTTPHandler)
urllib2.install_opener(opener)

# Read the ngsite
tdate = str(datetime.date.today())
sepdate = re.compile('\d\d(\d\d)-(\d+)-(\d+)')

year = sepdate.match(tdate).group(1)
month = sepdate.match(tdate).group(2)
day = sepdate.match(tdate).group(3)

site =
r"http://lava.nationalgeographic.com/cgi-bin/pod/wallpaper.cgi?day=" +
day + "&month=" + month + "&year=" + year
print site
data = urllib2.urlopen(site)

-- 
Senthil



From moonbee5555555555 at yahoo.com  Thu Nov 30 13:43:56 2006
From: moonbee5555555555 at yahoo.com (Boneh)
Date: 30 Nov 2006 10:43:56 -0800
Subject: Tkinter
In-Reply-To: <1164908779.941142.242400@80g2000cwy.googlegroups.com>
References: <1164908779.941142.242400@80g2000cwy.googlegroups.com>
Message-ID: <1164912236.741499.276670@l39g2000cwd.googlegroups.com>


Boneh wrote:
> The module is not found on the system, althouhg I can use python2.4. i
> am using fedoralinux5
> 
> Thanks

????????????????????????????????????



From tjreedy at udel.edu  Fri Nov  3 13:12:08 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 3 Nov 2006 13:12:08 -0500
Subject: MemoDepot: build YOUR OWN online notes library - anything, anytime,
	anywhere
References: <1162566190.152198.250310@h48g2000cwc.googlegroups.com>
Message-ID: <eig0pl$3gl$1@sea.gmane.org>


"ompaniess" <ompaniess at gmail.com> wrote in message 
news:1162566190.152198.250310 at h48g2000cwc.googlegroups.com...
[spam snipped]
> Any comments or suggestions, send to: support at memodepot.com
[cc'ed]
Don't spam random technical newsgroups with completely off-topic posts.
Such constitute anti-advertising.





From ccdetail at gmail.com  Thu Nov 23 13:35:18 2006
From: ccdetail at gmail.com (ccdetail at gmail.com)
Date: 23 Nov 2006 10:35:18 -0800
Subject: python gaining popularity according to a study
Message-ID: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>

http://www.tiobe.com/index.htm?tiobe_index

Python is the 7th most commonly used language, up from 8th.
The only one gaining ground besides VB in the top 10.

We're glad, our app is written in python.
It's free at http://pnk.com and it is a web timesheet for project
accounting



From fredrik at pythonware.com  Tue Nov 14 04:18:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 10:18:15 +0100
Subject: deleteing item from a copy of a list
In-Reply-To: <455984b5@quokka.wn.com.au>
References: <455984b5@quokka.wn.com.au>
Message-ID: <ejc1kl$3b7$1@sea.gmane.org>

timmy wrote:

> i make a copy of a list, and delete an item from it and it deletes it 
> from the orginal as well, what the hell is going on?!?!?!
 >
> #create the staff copy of the roster
> 	Roster2 = []
> 	for ShiftLine in Roster:
> 		#delete phone number from staff copy
> 		Roster2.append(ShiftLine)
> 		del Roster2[len(Roster2)-1][1]
> 
> Roster2 should have nothing to do with Roster, right??? doing a print of 
> both lists confirms that the phone number has been removed from both

you're not removing something from Roster2, you're removing something 
from the last item in Roster2.  the append methods adds a reference to 
an object to a list; it doesn't copy the object.

</F>



From gregg at lind-beil.net  Fri Nov 17 11:58:12 2006
From: gregg at lind-beil.net (Gregg Lind)
Date: Fri, 17 Nov 2006 10:58:12 -0600
Subject: Slicing / subsetting list in arbitrary fashion
Message-ID: <455DEA24.1060906@lind-beil.net>

One difficulty I am having with using Python for scientific computing is 
that I cannot figure out good ways to get arbitrary (unpatterned?) slices.

As an example, in R or Matlab / Octave, syntax exists such that:

vals = range(6)
wanted = [1,2,3,1,1,1]
vals[wanted] = [1,2,3,1,1,1]

Both of those languages also allow for using filter-like functionality:

Truths = [True,False,False,False,True,True]
valse[Truths] = [0,4,5]

In Python, solutions I have found for these tasks are:

[vals[ii]  for ii in wanted]    # task 1

[a[1]  for  in zip(Truths,vals) if  a[0] ]      # task 2


I find neither of these to be very satisfying.  Is there some other 
method for doing this?  I was unable to find a PEP relating to this, and 
would appreciate any help the combined brains of the Python world can give.

Gregg L.





From cloudrider9 at gmail.com  Wed Nov 29 14:59:20 2006
From: cloudrider9 at gmail.com (Scott_Davies)
Date: 29 Nov 2006 11:59:20 -0800
Subject: Good script editor for Python on Mac OS 10.3
Message-ID: <1164830360.213197.182560@l12g2000cwl.googlegroups.com>

Hi,

I have an old Mac with OS X Panther installed.  I also have the Python
language download file, but I haven't got a text/script editor to use
for it.  Does anyone have a recommendation for a good Python text
editor in OS 10.3?

Thanks,

Scott D.



From paddy3118 at netscape.net  Thu Nov 30 00:35:27 2006
From: paddy3118 at netscape.net (Paddy)
Date: 29 Nov 2006 21:35:27 -0800
Subject: XML blooming
Message-ID: <1164864927.746788.125390@j44g2000cwa.googlegroups.com>

(That is bloom as in http://www.wmhelp.com/xmlpad2.htm ;-)

Suddenly, OK, over a number of months, our design environment at work
has sprouted a wealth of XML configuration files, DTD's etc. The time
has come when I need to loose my XML cherry.
So , I guess I need to learn Elementtree.

In supporting our design environment I think I will need
 1) An editor that can read in a DTD or XML Schema Definition, (XSD),
as well as an XML file, and help me to write conforming XML.
 2) A tool to extract an XSD from XML examples.

Hmm, I'm also thinking about a Python project along the lines of
something that could translate between the world of the Traits package
(http://code.enthought.com/traits/), and XSD/DTD/XML. Has anyone done
this before? 

Thanks in advance, Paddy.



From kloro2006 at gmail.com  Tue Nov  7 17:32:28 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Tue, 07 Nov 2006 14:32:28 -0800
Subject: object data member dumper?
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
Message-ID: <4550fbfc$0$12098$88260bb3@free.teranews.com>

Bruno Desthuilliers wrote:

> tom arnall a ?crit :
>> does anyone know of a utility to do a recursive dump of object data
>> members?
>> 
> 
> What are "object data members" ? (hint: in Python, everything is an
> object - even functions and methods).
> 
> What is your real use case ?

something like:

   class A:
      def __init__(self, p1):
         self.p1 = p1

   class B: 
      def __init__(self,p1, p2):
         self.a = A(p1)
         self.p2 = p2
         self.v1 = '3'

   class C:
      def __init__(self):
         self.b = B(3,4)
         self.p3 = 5

   class D:
      def __init__(self):
         self.v2=2
         self.o1 = C()
         self.o2 = B(11,12)


   d = D()
   objectDataDumper(d)


would produce something like:

   object of class D with:
   o1(C)->b(B)->a(A)->p1=3
   o1(C)->b(B)->p2=4
   o1(C)->b(B)->v1=3
   o1(C)->p3=5
   o2(B)->a(A)->p1=11
   o2(B)->p2=12
   o2(B)->v1=3
   v2=2


tom arnall
north spit, ca
usa

-- 
Posted via a free Usenet account from http://www.teranews.com



From robert.kern at gmail.com  Sat Nov 18 15:31:48 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 18 Nov 2006 14:31:48 -0600
Subject: numpy magic: cast scalar returns auto to python types float &
	int   ?
In-Reply-To: <ejmv71$32h$1@news.albasani.net>
References: <ejk69e$2g1$1@news.albasani.net>	<mailman.337.1163769761.32031.python-list@python.org>	<ejkmmp$p6$1@news.albasani.net>	<mailman.358.1163788908.32031.python-list@python.org>
	<ejmv71$32h$1@news.albasani.net>
Message-ID: <ejnqk2$h0h$1@sea.gmane.org>

robert wrote:
> There remains the argument, that (float64,int32) scalars coming out should - by default - support the array interface. 
> How many people are there to expect and use this? I'd have never noticed it, if it wouldn't have been mentioned here. Have never seen such code nor seen somewhere or felt myself such a requirement. Thats very special an maybe can be turned on by a global option - if there is more than a handful of users for that.

It derived from our experience building scipy. Writing a library of functions
that work on scalars, vectors and higher-dimensional arrays requires either a
certain amount of generic behavior in its types or a lot of hairy code. We went
for the former. "Global options" affecting the behavior of types don't fit very
well in a library.

> I still think this is over-design and that it brings much much more disadvantages than advantages to let these beasts out by default into a general purpose language like python.

It's a judgement call. You judged differently than we have. <shrug>

> I think I'll stay as a voice to vote heavily against that scheme of numpy scalar types. 11 on a scale from 0 to 10 :-)

Vote all you like; no one's taking a poll at this time.

[I wrote:]
>> And yet again, the best place for numpy questions is the numpy mailing list, not
>> here. Here, you will get maybe one or two people responding to you, usually me,
>> and I'm a cranky SOB. There you will get much nicer people answering your
>> questions and more fully.
>>
>>   http://www.scipy.org/Mailing_Lists
> 
> Maybe once I take the hurdle to use this. Access and searching on such lists is somewhat proprietry. Numerics is a major field in Python land. There are also lots of cross relations to other libs and techniques.  Maybe there could be a nntp-comfortable comp.lang.python.numeric for users - and also a comp.lang.python.net, comp.lang.python.ui. I think that would greatly strentghen Pythons "marketing" in the numerics domain. main clp's posting frequency is too high anyway meanwhile.

When you have to put "numpy" in your subject lines because you're asking
questions about how and why numpy does this one particular thing, it's time to
think about posting to the appropriate list. If you need NNTP, use GMane.

  http://dir.gmane.org/gmane.comp.python.numeric.general

Here's the root of the problem: many of the people you want to talk to aren't
here. They don't read comp.lang.python; mostly it's just me, and I'm getting
crankier by the character.

-- 
Robert Kern

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



From malaclypse2 at gmail.com  Fri Nov 10 13:32:19 2006
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 10 Nov 2006 13:32:19 -0500
Subject: newbee I have an object how to check what's his class?
In-Reply-To: <ej2b34$9nk$1@ultra60.mat.uni.torun.pl>
References: <ej247d$4f4$1@ultra60.mat.uni.torun.pl>
	<1163171613.040825.78290@m73g2000cwd.googlegroups.com>
	<ej2b34$9nk$1@ultra60.mat.uni.torun.pl>
Message-ID: <16651e80611101032s476fe23btd5830cb8f2d88774@mail.gmail.com>

On 11/10/06, consternation <copiernik at wp.pl> wrote:
>
> result:
> isinstance(x,X)
> False
> type(x) is X
> False
> <type 'list'>
> list


I think you need to show us more of your code.  Your variable, v, is not of
type X in this example.  Instead, it is of type list.  What is
self.mem.items()?  It isn't a dictionary like your comment seems to imply,
or you would get a TypeError on that line because dictionaries aren't
callable.

Please give us enough sample code that we can actually run it and see what
you're seeing.

-- 
Jerry
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From fredrik at pythonware.com  Fri Nov 24 06:11:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 12:11:01 +0100
Subject: Local variables persist in functions?
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <ek6k08$b1s$1@sea.gmane.org>

<120psi at gmail.com> wrote:

> chunks = _chunkify( list, size )   # _curList keeps its previous value!
> chunks = _chunkify( list, size, list() )    # this works as expected
>
> Considering the default value of _curList, these statements should be
> identical.  Any pointers?

http://effbot.org/pyfaq/why-are-default-values-shared-between-objects.htm

> Did I miss something in the python reference manual?  (running 2.4.3, fyi)

the paragraph that starts with "Default parameter values are evaluated when
the function definition is executed." in bold,  perhaps.  I've highlighted it
on this page:

    http://effbot.org/pyref/def.htm

</F> 





From jameshcunningham at gmail.com  Fri Nov 10 15:55:52 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Fri, 10 Nov 2006 15:55:52 -0500
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
	<2006111015340116807-jameshcunningham@gmailcom>
	<mailman.2067.1163191705.11739.python-list@python.org>
Message-ID: <2006111015555275249-jameshcunningham@gmailcom>

On 2006-11-10 15:47:42 -0500, Max Erickson <maxerickson at gmail.com> said:

>>>> color='orange'
>>>> if color=='red' or 'blue' or 'green':
> 	print "Works?"
> 
> 	
> Works?

No! No no no. I won't hear of it.

Don't you know that with insufficient test cases, everything is right? Sheesh.

Best,
James



From sjmachin at lexicon.net  Mon Nov 20 06:29:21 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 03:29:21 -0800
Subject: fileinput.input('test.txt') => ERROR: input() already active
In-Reply-To: <1164020503.611469.71310@h54g2000cwb.googlegroups.com>
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>
	<ejrqnb$5o3$02$1@news.t-online.com>
	<1164016727.678036.225640@e3g2000cwe.googlegroups.com>
	<1164018218.422003.286870@h54g2000cwb.googlegroups.com>
	<1164020503.611469.71310@h54g2000cwb.googlegroups.com>
Message-ID: <1164022161.561846.276010@m73g2000cwd.googlegroups.com>


cyberco wrote:
> > > Please don't use lowercase "L" as a variable name;
>
> Ohoh...I plead guilty! I totally forgot about CS 101... :)

I don't understand the reference to CS 101.

It's quite simple: If you want people to bother reading your postings
and help you, make them easy to comprehend. Otherwise they won't bother
a second time.



From sjmachin at lexicon.net  Wed Nov 29 16:52:16 2006
From: sjmachin at lexicon.net (John Machin)
Date: 29 Nov 2006 13:52:16 -0800
Subject: utf - string translation
In-Reply-To: <mailman.850.1164831380.32031.python-list@python.org>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>
	<mailman.832.1164798594.32031.python-list@python.org>
	<1164829990.146305.92750@l39g2000cwd.googlegroups.com>
	<mailman.850.1164831380.32031.python-list@python.org>
Message-ID: <1164837136.303079.312060@j44g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> John Machin wrote:
>
> > 3. ... and to check for missing maps. The OP may be working only with
> > French text, and may not care about Icelandic and German letters, but
> > other readers who stumble on this (and miss past thread(s) on this
> > topic) may like something done with \xde (capital thorn),  \xfe (small
> > thorn) and \xdf (sharp s aka Eszett).
>
> I did post links to code that does this to this thread, several days ago...
>

Ah yes, I missed that  -- and your posting doesn't advertise that the
code fixed the "one character should be mapped to two" cases :-)

This code
(http://effbot.python-hosting.com/file/stuff/sandbox/text/unaccent.py)
looks generally very good, but I'm left wondering why "AE" and "OE" in
the table, not "Ae and "Oe":
[snip]
    0xc6: u"AE", # LATIN CAPITAL LETTER AE <<<=== ??
    0xd0: u"D",  # LATIN CAPITAL LETTER ETH
    0xd8: u"OE", # LATIN CAPITAL LETTER O WITH STROKE <<<=== ??
    0xde: u"Th", # LATIN CAPITAL LETTER THORN
[snip]

Another point: there are many non-latin1 characters that could be
mapped to ASCII. For example:
    u"\u0141ukasziewicz".translate(unaccented_map())
doesn't work unless an entry is added to the no-decomposition table:
    0x0141: u"L", # LATIN CAPITAL LETTER L WITH STROKE

It looks like generating extra entries like that could be done, with
the aid of unicodedata.name():

LATIN CAPITAL LETTER X WITH blahblah -> "X"
LATIN SMALL LETTER X WITH blahblah -> "X".lower()

This would require a fair bit of care -- obviously there are special
cases like LATIN CAPITAL LETTER O WITH STROKE. Eyeballing by regional
experts is probably required.

Cheers,
John



From james-netnews at and.org  Mon Nov 20 17:25:39 2006
From: james-netnews at and.org (James Antill)
Date: Mon, 20 Nov 2006 16:25:39 -0600
Subject: Question about unreasonable slowness
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
	<455ce05a$0$5794$4d3efbfe@news.sover.net>
	<1163773005.201111.175020@f16g2000cwb.googlegroups.com>
	<mailman.347.1163778501.32031.python-list@python.org>
	<1163795956.923263.200590@e3g2000cwe.googlegroups.com>
Message-ID: <Tsydnegq7KP-tv_YnZ2dnUVZ_rGdnZ2d@99main.com>

On Fri, 17 Nov 2006 12:39:16 -0800, allenjo5 wrote:

>> allenjo5 at mail.northgrum.com:
>> > Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
>> > shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
>> > python 2.4.3.   So, that's better, but still unreasonably slow.  And to
>> > answer another's question, I'm using the ksh builtin 'time' command to
>> > time the overall script.
>> >
>> > BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
>> > This naively translated pure shell version of my python test script
>> > completes in .1 secs:
>> >
>> > i=1
>> > while ((i<20))
>> > do ((i+=1))
>> >    print next
>> >    print "$shellIn" | /bin/sh -c ':' |
>> >            while read line
>> >            do print $line
>> >            done
>> > done
>>
> Yeah, apparently this is an AIX specific issue - perhaps the python
> implementation of popen4() needs to do something special for AIX?

 This seems likely a more general issue, rather than just a python issue
(although the huge speed up from moving to 2.5.x). A
couple of things I'd try:

1. Split the spawn/IO apart, twenty procs. should be fine.
2. Try making the pipe buffer size bigger (optional third argument to
os.popen4).
3. Note that you might well be spawning three processes, and
are definitely doing two shells. Any shell init. slowness is going to be
none fun. Use an array to run /bin/true, and time that.

-- 
James Antill -- james at and.org
http://www.and.org/and-httpd/ -- $2,000 security guarantee
http://www.and.org/vstr/


From fredrik at pythonware.com  Thu Nov 23 16:39:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 22:39:31 +0100
Subject: Access to variable from external imported module
In-Reply-To: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
Message-ID: <ek54el$mo2$1@sea.gmane.org>

GinTon wrote:

> How to access to a variable (that value is not returned) from a module
> imported?
> And the variable is set at the module-level.

   import module
   print module.variable

(have you read the Python tutorial?)

</F>



From eric_brunel at despammed.com  Thu Nov  9 03:17:53 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 09 Nov 2006 09:17:53 +0100
Subject: Problem getting a file pathname with tkFileDialog
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
	<n2t924-frs.ln1@eskimo.tundraware.com>
Message-ID: <op.tiqpb3ydrqur0o@eb.pragmadev>

On Wed, 08 Nov 2006 21:59:38 +0100, Tim Daneliuk <tundra at tundraware.com>  
wrote:

> Sefyroth wrote:
>> Thanks,
>>  but I get this error when I try this.
>>  UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
>> position 12: ordinal not in range(128)
>>   I had encountered it with the askdirectory method as well. Is there an
>> easy way to bypass this?
>>  Thanks again
>
> I believe you are running into a directory or file name that has
> non-ascii characters in it.  Python as shipped is set up to
> deal with ascii as its native encoding format.  You can change
> this by editing the "site.py" file - look in the Lib directory
> in your python installation.  Look for this code:
>
> -------------------------------
> def setencoding():
>      """Set the string encoding used by the Unicode implementation.  The
>      default is 'ascii', but if you're willing to experiment, you can
>      change this."""
>      encoding = "ascii" # Default value set by _PyUnicode_Init()
>      if 0:
>          # Enable to support locale aware default string encodings.
>          import locale
>          loc = locale.getdefaultlocale()
>          if loc[1]:
>              encoding = loc[1]
> -------------------------------
>
>
>
> Change the "if 0:" to "if 1:" and see if that doesn't fix the problem.

This is usually a bad idea, especially if the script must be distributed  
to other users in any way: since they probably never did this "trick", the  
code will fail when they use it.

I know it's a pain, but you *have* to deal with encodings yourself, and  
not let the system guess what you might want.

In the OP's case, the problem just lies in the 'print' statement, that  
tries to encode the file name in ASCII before printing it. So just doing:
print repr(file.name)
would solve the problem.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From dhhoa1 at student.monash.edu  Wed Nov  8 22:04:08 2006
From: dhhoa1 at student.monash.edu (Hieu Hoang)
Date: Thu, 09 Nov 2006 14:04:08 +1100
Subject: Python deployment options
Message-ID: <f7d7d76f4fcd.4fcdf7d7d76f@monash.edu.au>

Hi list,
I have packaged a few pygames to one exe file with pyinstaller ( http:/
/pyinstaller.python-hosting.com/ ), sent them to my friends and the 
executables 
work. Running them shows a Fatal Error dialog box with only 
"MSVCR71.DLL", but nothing breaks, despite whether the system has 
python or not.
I haven't been able to figure out py2exe setup script yet, so I can't 
compare them.

Hope this helps,
Rooy


From Tim.Golden at viacom-outdoor.co.uk  Tue Nov 28 05:07:09 2006
From: Tim.Golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 28 Nov 2006 10:07:09 -0000
Subject: Accessing file metadata on windows XP
In-Reply-To: <1164704134.100569.101270@j72g2000cwa.googlegroups.com>
Message-ID: <CCAC78D42E32184F8E26DC163DB98306C1B633@vogbs009.gb.vo.local>

[wileyregister22 at gmail.com]

| When rightclicking a, for example, pdf file on windows, one normally
| gets a screen with three or four tags.  Clicking on one of the summary
| tag one can get some info like "title", "Author", "category", 
| "keyword"
| etc..

[warning: not my area of expertise]

That information's held in NTFS Alternate Data Streams.
If you search around with terms like

NTFS (ADS OR "Alternate Data Streams") 

you'll see a whole raft of info on the subject.

In MS Office (and other OLE documents) the information 
is exposed as what's called Structured Storage. I've got 
a bit of a wrapper round it in my winshell module, which 
you could either use direct or simply take as the starting
point for what you're after:

http://timgolden.me.uk/python/winshell.html

or else just search for OLE Structured Storage

Python can read ADS normally; simply specify the alternate
data stream colon syntax when you open a file:

info = open ("temp.pdf:\x05SummaryInformation").read ()

but you have to know what to do with it when you get it.
Sorry, don't have time to play with it right now; hopefully 
someone more knowledgeable can chip in.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From __peter__ at web.de  Fri Nov  3 03:31:16 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 03 Nov 2006 09:31:16 +0100
Subject: __doc__ in compiled script
References: <mailman.1686.1162499924.11739.python-list@python.org>	<eidltd$v0m$01$2@news.t-online.com>
	<7.0.1.0.0.20061102215407.05c151e0@yahoo.com.ar>
	<mailman.1703.1162539955.11739.python-list@python.org>
Message-ID: <eieuoe$n0p$00$1@news.t-online.com>

Fredrik Lundh wrote:

> Gabriel Genellina wrote:
> 
>>> >>> co.co_consts[list(co.co_names).index("__doc__")]
>>> 'This is a docstring'
>> 
>> Good! I'll buy this one :) thanks!
> 
> however, there's no 1:1 mapping between names and constants; if you want
> code that works by accident, you might as well use co_consts[0].

Seems like I hid the magic constant in some voodoo code. There is an
advantage over co_consts[0], though: it balks when there is no docstring.

Peter


From gagsl-py at yahoo.com.ar  Fri Nov 24 20:17:27 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 22:17:27 -0300
Subject: Getting exceptions back from calls to embedded python
In-Reply-To: <1164200452.424657.168410@h48g2000cwc.googlegroups.com>
References: <1164200452.424657.168410@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061124215647.03441950@yahoo.com.ar>

At Wednesday 22/11/2006 10:00, john.pye at gmail.com wrote:

>I have an application that is using embedded python to offer some
>scripting ability. An API is exposed via SWIG, and I am accessing that
>API from my embedded python interpreter.
>
>Scripts are present as separate files, and I'm invoking them at present
>using the following:
>
>         iserr = PyRun_AnyFileEx(f,name,1);
>
>         if(iserr){
>                 /* tell the user */
>                 return 1;
>         }else{
>                 /* all good */
>                 return 0;
>         }
>
>My question is, if I want to be able to get information about
>exceptions that have occurred here (perhaps a syntax error, or an
>import error, or perhaps a runtime error), what would be the easiest
>way to do this now?
>
>I understand that I'm currently using the 'very high level interface'
>for python embedding. What's the easiest next step down that will allow
>me to catch exceptions and report them?

I can't verify it right now, but I think that the PyRun_File* family 
would let you call PyErr_Occurred and related functions afterwards.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From zsp007 at gmail.com  Mon Nov 13 09:56:42 2006
From: zsp007 at gmail.com (=?UTF-8?B?5byg5rKI6bmP?=)
Date: Mon, 13 Nov 2006 22:56:42 +0800
Subject: Find how to embed the BitTorrent in my program
Message-ID: <455887AA.9080802@gmail.com>

Is there any module can easy embed the BitTorrent(both tracker and 
client) in myself's program .
Or where can find the documents for reuse official BitTorrent .

Thanks.


From ajkadri at googlemail.com  Tue Nov  7 10:30:49 2006
From: ajkadri at googlemail.com (ajkadri at googlemail.com)
Date: 7 Nov 2006 07:30:49 -0800
Subject: Help with installing soappy module on Python 2.4.3 (windows machine)
Message-ID: <1162913449.381411.261040@k70g2000cwa.googlegroups.com>

Hi Folks,


I want to install the SOAPpy module on my windows box. I have python
2.4.3

Can you help me with the steps and the URL from where can I get the
download..??

TIA.

Regards,
Asrarahmed



From ptmcg at austin.rr._bogus_.com  Sun Nov 19 05:42:45 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 10:42:45 GMT
Subject: Why isn't SPLIT splitting my strings
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
Message-ID: <FyW7h.326$_H5.204@tornado.texas.rr.com>

"ronrsr" <ronrsr at gmail.com> wrote in message 
news:1163931285.390782.130500 at h54g2000cwb.googlegroups.com...
> I'm trying to break up the result tuple into keyword phrases.  The
> keyword phrases are separated by a ;  -- the split function is not
> working the way I believe it should be. Can anyone see what I"m doing
> wrong?
>
> bests,
>
> -rsr-
>
>
>
> print "newstring =", str(result[i][0])
>        print "just split", str(result[i][0]).split('; ()[]"')
>        zd.append(str(result[i][0]).split('; ()[]"'))
>
>
> result= (('Agricultural subsidies; Foreign aid',), ('Agriculture;
> Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
> Childhood Development, Birth Defects; Toxic Chemicals',),
> ('Antibiotics, Animals',), ('Agricultural Subsidies, Global Trade',),
> ('Agricultural Subsidies',), ('Biodiversity',), ('Citizen Activism',),
> ('Community Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture,
> Cotton',), ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
> ('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
> Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
> Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
> ('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
> Childhood Development, Birth Defects',), ('Corporate Reform,
> Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
> (Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
> Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
> ('Democracy, Corporate
>
>
There are no ()'s or []'s in any of your tuple values, these are just 
punctuation to show you the nested tuple structure of your db query results. 
You say ';' is your keyword delimiter, so just split on ';'.

Also split('; ()[]') does not split on any one of the listed characters, but 
only on the complete string '; ()[]', which occurs nowhere in your data.

-- Paul


# for each result in the tuple of tuples, split on ';', and then print the 
results separated by " : " to show that we really did separate the results

for t in result:
    print " : ".join(t[0].split(';'))

Gives:
Agricultural subsidies :  Foreign aid
Agriculture : Sustainable Agriculture - Support :  Organic Agriculture : 
Pesticides, US,Childhood Development, Birth Defects :  Toxic Chemicals
Antibiotics, Animals
Agricultural Subsidies, Global Trade
Agricultural Subsidies
Biodiversity
Citizen Activism
Community Gardens
Cooperatives
Dieting
Agriculture,Cotton
Agriculture, Global Trade
Pesticides, Monsanto
Agriculture, Seed
Coffee, Hunger
Pollution, Water,Feedlots
Food Prices
Agriculture, Workers
AnimalFeed, Corn, Pesticides
Aquaculture
Chemical Warfare
Compost
Debt
Consumerism
Fear
Pesticides, US,Childhood Development, Birth Defects
Corporate Reform,Personhood (Dem. Book)
Corporate Reform,  Personhood, Farming(Dem. Book)
Crime Rates, Legislation, Education
Debt,Credit Cards
Democracy
Population, World
Income 




From cfriedl at bigpond.net.au  Fri Nov 17 22:05:35 2006
From: cfriedl at bigpond.net.au (Chris)
Date: Sat, 18 Nov 2006 03:05:35 GMT
Subject: How can I speed this function up?
In-Reply-To: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>

Chris wrote:
> This is just some dummy code to mimic what's being done in the real 
> code. The actual code is python which is used as a scripting language in 
> a third party app. The data structure returned by the app is more or 
> less like the "data" list in the code below. The test for "ELEMENT" is 
> necessary ... it just evaluates to true every time in this test code. In 
> the real app perhaps 90% of tests will also be true.
> 
> So my question is how can I speed up what's happening inside the 
> function write_data()? Only allowed to use vanilla python (no psycho or 
> other libraries outside of a vanilla python install).
> 
> I have a vested interest in showing a colleague that a python app can 
> yield results in a time comparable to his C-app, which he feels is mch 
> faster. I'd like to know what I can do within the constraints of the 
> python language to get the best speed possible. Hope someone can help.
> 
> def write_data1(out, data):
>     for i in data:
>         if i[0] is 'ELEMENT':
>             out.write("%s %06d " % (i[0], i[1]))
>             for j in i[2]:
>                 out.write("%d " % (j))
>             out.write("\n")
> 
> import timeit
> 
> # basic data mimicing data returned from 3rd party app
> data = []
> for i in range(500000):
>     data.append(("ELEMENT", i, (1,2,3,4,5,6)))
> 
> # write data out to file
> fname = "test2.txt"
> out = open(fname,'w')
> start= timeit.time.clock()
> write_data2(out, data)
> out.close()
> print timeit.time.clock()-start
> 
> 

with this function I went from 8.04 s to 6.61 s. Now running up against 
my limited knowledge of python. Any chance of getting faster?

def write_data4(out, data):
     for i in data:
         if i[0] is 'ELEMENT':
             strx = "%s %06d " % (i[0], i[1])
             strx="".join([strx] + ["%d " % (j) for j in i[2]] + "\n"])
             out.write(strx)



From grante at visi.com  Thu Nov 30 15:22:04 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 30 Nov 2006 20:22:04 -0000
Subject: Python 2.4 does not marshal infinity floating point properly
	under Win32
References: <1164917855.809114.184580@j72g2000cwa.googlegroups.com>
Message-ID: <12mufbcmk7qpu8c@corp.supernews.com>

On 2006-11-30, Pierre Rouleau <prouleau001 at gmail.com> wrote:

> When using Python 2.4.x on a Win32 box,
> marshal.loads(marshal.dumps(1e66666))  returns 1.0 instead of infinity
> as it should and does under Python 2.5 (also running on Win32 ).
>
> This problem was reported in another thread here by Peter Hansen
> http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/5c2b4b2a88c8df4/f216739705c9304f?lnk=gst&q=simplejson&rnum=5#f216739705c9304f
>
> Is this considered an important enough bug to fix it in Python 2.4?

This must be at least the third thread on this topic so far
this week.  And I didn't start _any_ of them (this week). 

:)

-- 
Grant Edwards                   grante             Yow!  Imagine--a WORLD
                                  at               without POODLES...
                               visi.com            


From tim.peters at gmail.com  Thu Nov 30 17:04:38 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 30 Nov 2006 17:04:38 -0500
Subject: Python spam?
In-Reply-To: <eknj51$bt7$1@panix3.panix.com>
References: <ekn9pi$ek8$1@panix3.panix.com>
	<mailman.895.1164917209.32031.python-list@python.org>
	<eknj51$bt7$1@panix3.panix.com>
Message-ID: <1f7befae0611301404v5e3bb702n2be1c88a235143ef@mail.gmail.com>

[Aahz]
>>> Anyone else getting "Python-related" spam?  So far, I've seen messages
>>> "from" Barry Warsaw and Skip Montanaro (although of course header
>>> analysis proves they didn't send it).

[Thomas Heller]
>> I'm getting spam not only from Barry, but also from myself ;-) with
>> forged headers.  But I'm not sure what you mean with Python-related...
>> Not the contents, IIRC.

[Aahz[
> Thing is, I don't usually get spam "from" people I know (or at least it
> gets filtered before I see it), so someone is clearly using some resource
> of Python-related email addresses.  Just seems rather odd, and I wonder
> whether it's some kind of DoS attack or what.

It's been going on for years.  The most frequent forged "Python
related" sender address I've seen is actually help at python.org,
followed (but not closely) by /F's fredrik at pythonware.com.  Spammers
harvest legit addresses to forge via scraping web pages and via
Trojans scouring newbies' address books.  The latter probably accounts
for the very high rate of help at python.org forgeries.  Via the former,
anyone with a "public" email address can expect to see it get forged
sooner or later.

About two years ago I sent a polite email to a porn vendor asking them
to please stop forging one of my email addresses as the sender of
their spam.  They didn't reply, but within a few days I stopped
receiving porn spam claiming to come from me.  Frankly, I miss it :-)


From sjmachin at lexicon.net  Wed Nov 22 15:46:35 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 12:46:35 -0800
Subject: Is there a list comprehension for this?
In-Reply-To: <pan.2006.11.22.11.41.24.555150@REMOVE.THIS.cybersource.com.au>
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.04.33.02.200546@REMOVEME.cybersource.com.au>
	<1164171602.525542.56750@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.10.17.59.870599@REMOVE.THIS.cybersource.com.au>
	<1164191284.251308.316810@f16g2000cwb.googlegroups.com>
	<pan.2006.11.22.11.41.24.555150@REMOVE.THIS.cybersource.com.au>
Message-ID: <1164228395.805881.326270@h54g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> On Wed, 22 Nov 2006 02:28:04 -0800, John Machin wrote:
>
> >
> > Steven D'Aprano wrote:
> >> On Tue, 21 Nov 2006 21:00:02 -0800, John Machin wrote:
> >>
> >> > Steven D'Aprano wrote:
> >> >
> >> > [snip]
> >> >
> >> >> def running_sum(dw):
> >> >>     """Return a list of the running sums of sequence dw"""
> >> >>     rs = [0]*len(dw)
> >> >>     for i in range(len(dw)):
> >> >>         rs[i] = dw[i] + rs[i-1]
> >> >
> >> > Please explain to the newbies why there is no exception raised when
> >> > rs[i-1] is executed for i == 0, and state whether you consider this is
> >> > a Good Idea or a Filthy Trick or a Fortunate Accident.
> >>
> >> Because rs[0-1] is just rs[-1], which fetches the LAST item of the list. I
> >> cunningly initialised the list to all zeroes, so adding zero to the first
> >> term doesn't change the result value.
> >>
> >> It is a variation of the sentinel technique, where you add an extra value
> >> to the beginning or end of a list so that you don't need to treat the
> >> first or last item differently. In this specific case, I think it is a
> >> combination of Good Idea and Fortunate Accident, but since the
> >> meaning of list[-1] is both deliberate and well-documented, it is
> >> certainly not a Filthy Trick.
> >>
> >
> > Fair enough. But it does make the concerned reader go back a couple of
> > lines to see why it doesn't run amok.
>
> Nobody said that every piece of code should be instantly comprehensible
> just at a glance.

That's correct. I didn't say it, and nobody else did. You argue ad
extremis, in extremis :-)

My point was merely that it is preferable to be able to understand code
without having to go "OMG!" and then read backwards ...

> Sometimes you do actually have to think about code to
> understand it, even in Python :)

Correct. However I raised the question explicitly in the context of an
answer to a *newbie* ("Please explain to the newbies").
Notwithstandingly, you then mentioned "cunningly" and
"[well-]documented" and now "think" :-)

>
> > Here's my attempt at a
> > no-reader-backtracking solution:
> >
> > def running_sum_2(dw):
> >     rs = dw[:1]
> >     for i in xrange(1, len(dw)):
> >         rs.append(dw[i] + rs[-1])
> >     return rs
> >
> > Comments invited.
>

[snip]

>
> Although the speed difference disappears (or even reverses) for small
> enough lists. Either way, it isn't really a major speed difference --

As you say. Perhaps I should have stated in advance how many goalposts
and whether they had a cross-bar or not :-) I was hoping for comments
on the understandibility or otherwise of rs[-1]. My use of xrange was
out of habit; it wasn't intended to provoke the cannonball run.
>
> But why build a list of all the running sums when you probably only need
> them one at a time? Here's a generator version that can take any iterable,
> not just a sequence:
>

... and whether the cross-bar had a net slung from it :-)

Why? (1) Because that's what the OP was asking for IIRC. (2) Because
some applications (at least back when the storage mechanism was squared
paper) involved cumulative sums of cumulative sums of ... generator
version, please :-)

N.B. This is even more fun than discussing cricket with my Pommie
neighbour; keep it up :-)

Best regards,
John



From faulkner612 at comcast.net  Tue Nov 28 23:14:08 2006
From: faulkner612 at comcast.net (faulkner)
Date: 28 Nov 2006 20:14:08 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
Message-ID: <1164773648.936439.98990@n67g2000cwd.googlegroups.com>

functional programming, list comprehensions, decorators, duck typing,
generators, dynamism, introspection, prettier code, simpler grammar
[see digg and /. for the graphs], and, of course, the trolls.

gavino wrote:
> wtf



From fredrik at pythonware.com  Thu Nov  2 10:56:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 16:56:45 +0100
Subject: Sanity check on use of dictionaries
In-Reply-To: <1162478526.063884.155320@b28g2000cwb.googlegroups.com>
References: <1162478526.063884.155320@b28g2000cwb.googlegroups.com>
Message-ID: <eid4fq$ldi$1@sea.gmane.org>

dopey483 at gmail.com wrote:

> I am manipulating lots of log files (about 500,000 files and about 30Gb
> in total) to get them into a little SQL db. Part of this process is
> "normalisation" and creating tables of common data. I am creating
> dictionaries for these in a simple {value,key} form.
> 
> In terms of memory and performance what are the reasonable limits for a
> dictionary with a key and a 16 character string? eg; if I read in one
> of my tables from disk into a dictionary, what sizing is comfortable?
> 100,000 entries? 1,000,000 entries? Lookup times and memory
> requirements are my main worries.

you don't specify what a "key" is, but the following piece of code took 
less than a minute to write, ran in roughly two seconds on my machine, 
and results in a CPython process that uses about 80 megabytes of memory.

 >>> d = {}
 >>> for i in range(1000000):
...     k = str(i).zfill(16)
...     d[k] = k
...
 >>> k
'0000000000999999'

since dictionaries use hash tables, the lookup time is usually 
independent of the dictionary size.  also see:

     http://www.effbot.org/pyfaq/how-are-dictionaries-implemented.htm

</F>



From ptmcg at austin.rr._bogus_.com  Wed Nov  1 12:27:06 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 01 Nov 2006 17:27:06 GMT
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
	<Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <KN42h.561$Qn2.495@tornado.texas.rr.com>


"Rob Williscroft" <rtw at freenet.co.uk> wrote in message 
news:Xns986EAF9E3447DrtwfreenetREMOVEcouk at 216.196.109.145...
> Paul McGuire wrote in news:XU32h.436$lx6.417 at tornado.texas.rr.com in
> comp.lang.python:
>
>>
>> class Constants(object)
>>     pass
>>
>> (I guess value immutability could probably be implemented using clever
>> implementations of __setattr__ and such, but is it really worth the
>> bother?).
>>
>> Then I defined the context for my LEFT and RIGHT constants, which are
>> being created to specify operator associativity, and then my constant
>> fields as attributes of that object:
>>
>> opAssoc = Constants(object)
>> opAssoc.RIGHT = 0
>> opAssoc.LEFT = 1
>>
>
> This is nice, but you can cut down on some of the cruft:
>
> class Constants( object ):
>  pass
>
> Constants.RIGHT = 0
> Constants.LEFT = 1
>
> ## client code ...
> print Constants.LEFT
>
> Rob.

One man's cruft is another man's clarity.  The reason I used instances 
instead of just the Constants class was so that I could define a little more 
descriptive context for the constants, rather than simply a shortcut for 
importing lots and lots of constant definitions.  I expect I will want to 
define some more constants for other parts of pyparsing, and the instance 
scoping helps organize them, that's all.  It's really a style/taste issue at 
this point.  What you've written will certainly work, and if Neil has many 
constants in his module, what you suggest would be a way to import them all 
at once.

-- Paul




From newshound at incanberra.com.au  Tue Nov 21 22:26:04 2006
From: newshound at incanberra.com.au (AndyR)
Date: Wed, 22 Nov 2006 14:26:04 +1100
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com><7.0.1.0.0.20061121213222.041021c8@yahoo.com.ar>
	<mailman.568.1164159352.32031.python-list@python.org>
Message-ID: <4563c355$1@mail.netspeed.com.au>

Hi all:

>From my experience with os's.
Time is updated at intervals- they may be as low as 1mS See . So for that 
millisecond multiple readings of the time will always return the same 
result. Therefore time.time() < time.time() will be false for most readings.

However the result could be true if you catch the exact time when the os 
updates its clock. It will only be True for a single execution of the line 
and you will have to be lucky to catch it at just the right time.

Of course if you hard loop over the interval its possible to see the 
transition.

for x in xrange (10000):
    t = time.time()
    if t < time.time:
        print "transition at ",  t

Enjoy.
Andy

"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message 
news:mailman.568.1164159352.32031.python-list at python.org...
> Gabriel Genellina <gagsl-py at yahoo.com.ar> writes:
>
>> The only thing Python can guarantee, is that the left expression is
>> evaluated before the right one (5.13 Evaluation order, Language
>> Reference).
>
> Thanks, that answers my question asked elsewhere.
>
> -- 
> \          "One thing vampire children have to be taught early on is, |
>  `\                   don't run with a wooden stake."  -- Jack Handey |
> _o__)                                                                  |
> Ben Finney
> 




From beliavsky at aol.com  Wed Nov 29 17:36:31 2006
From: beliavsky at aol.com (Beliavsky)
Date: 29 Nov 2006 14:36:31 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <456e09b7$0$1505$db0fefd9@news.zen.co.uk>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e09b7$0$1505$db0fefd9@news.zen.co.uk>
Message-ID: <1164839790.959848.54570@l39g2000cwd.googlegroups.com>

Will McGugan wrote:
> Steve Bergman wrote:
> > Just wanted to report a delightful little surprise while experimenting
> > with psyco.
> > The program below performs astonoshingly well with psyco.
> >
> > It finds all the prime numbers < 10,000,000
>
> Actualy, it doesn't. You forgot 1 and 2.

The number 1 is not generally considered to be a prime number -- see
http://mathworld.wolfram.com/PrimeNumber.html .



From robin at NOSPAMreportlab.com  Sat Nov 25 13:14:59 2006
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sat, 25 Nov 2006 18:14:59 +0000
Subject: Graph Data Structures
In-Reply-To: <1164465588.399198.173830@f16g2000cwb.googlegroups.com>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
Message-ID: <45688823.6030508@jessikat.plus.net>

Szabolcs Nagy wrote:
........
> if you only want to do some analysis i think you need this one (as it's
> pretty complete and simple):
> https://networkx.lanl.gov/
........

seems to be broken at present with a python traceback coming out; not a 
good advert for python and/or trac
-- 
Robin Becker


From inq1ltd at verizon.net  Wed Nov 22 11:59:27 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 22 Nov 2006 11:59:27 -0500
Subject: Caution newbie question: python window to stay open ?
In-Reply-To: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
References: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
Message-ID: <200611221159.28042.inq1ltd@verizon.net>


Michael,

put this at the top of your code. After the window 
closes read the testLog.out file. It may give you 
a clue as to what is happening.

sys.stdout = open('testLog.out', 'w')


jim-on-linux	
http://www.inqvista.com


On Tuesday 21 November 2006 22:20, mkengel wrote:
> Caution: newbie question
>
> I am using python 2.4.3-11 on Windows XP.
> Problem: Python window closes immediately after
> executing a *.py file (e.g. containing a
> "print..." command. What do I have to do to
> keep it open to see the results ?
>
> "Interactive window" stays open.
>
> Thank you.
> Michael


From no-spam at no-spam-no-spam.invalid  Fri Nov 24 11:11:52 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 17:11:52 +0100
Subject: Pimping the 'cgi' module
In-Reply-To: <mailman.674.1164373472.32031.python-list@python.org>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>	<mailman.670.1164364120.32031.python-list@python.org>	<ek6ncq$7pp$1@news.albasani.net>
	<mailman.674.1164373472.32031.python-list@python.org>
Message-ID: <ek75kc$1vm$1@news.albasani.net>

Christoph Haas wrote:
> On Friday 24 November 2006 13:08, robert wrote:
>> well, note, for that they have named it Ruby-On-Rails, so its still the
>> language - leveraged. While it is Zope/Django/Ego-on-Python ... ?
> 
> If by that you mean that neither Zope nor Django are exactly pythonic I 
> think I concur.

on-python, but not python-on :-) - as we discussed about "framework vs. directness/intuition"
Zope and Django's Ego certainly won't fit into/near the stdlib

>> Unless a Guido'ed version of such thing is not _selected_ into the
>> stdlib or at least promoted single-mindedly and prominently by far
>> before high-tech-but-low-number names like Zope and Django, Python will
>> continue to bleed out heavily on numbers vs. Ruby.
> 
> Guido seems to have been confused about the rank growth of web based 
> frameworks himself. So it's even less likely one of them gets included as 
> part of the standard library in finite time.

Yet so he will decide about the magnitude of order of future Python users. I'm sure the door will open once ..
Py3K will not make as big a change regarding this magnitude. 

>> First need of course: an update of that cgi "module".
> 
> Oh, yeah. I just joined the Web SIG and found out that WSGI seems the way 
> to go. At a first look it seems horrible if you just want to provide a CGI 
> module. But there must be some reason for its existence. :) Looking 
> further through http://wiki.python.org/moin/WebFrameworks my head starts 
> to spin. Somehow I sadly feel I would just add another incomplete 
> framework to that pile.
> 
> I'm especially unsure whether it's good or bad to create another "I'm sick 
> of the standard library"-style module. I've just become a bit less 
> confident to actually contribute something useful there. Overwhelming.

tying selected techniques together on the right level is the task. Its not forbidden to learn a little from Rails and Perl module structure.

>> python-dev is fully occupied with top-notch inner life. Of course that
>> is the basis. But key issues in lib&tools were simply forgotten - left
>> to a random community.
> 
> Which doesn't match the "batteries included" fuss at all. Of course the 
> basis has to be good, too. And there are so many paradigms today that no 
> core-python developer can really be expected to provide good standard 
> modules for everyone.
> 
>> Go for a start. In order to realize that essential batteries in good
>> quality within time - even after 10 years now - it is necessary, to hook
>> python-dev for even requesting it actively. Just adding to
>> http://wiki.python.org/moin/WebProgramming and
>> http://wiki.python.org/moin/WebFrameworks is not the task. It requires
>> some organization and somewhat a selection process in addition to good
>> (probably existing) code v0.1xxx material. I think it would not be
>> overly complex. Both, a new cgi and possibly included snake "rails" (vs
>> "oil")
> 
> Oil is deprecated anyway. :) I'll see if I can find my way into the SIG. 
> And - yes - adding another framework will surely not help us out of the 
> divergence. The more frameworks there are the more people seem to feel 
> urged to say "heck, it will be easier to write my own framework than 
> evaluate all 30 packages on that page".
> 
>  Christoph


From malaclypse2 at gmail.com  Sat Nov 25 00:27:24 2006
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Sat, 25 Nov 2006 00:27:24 -0500
Subject: The Python Papers Edition One
In-Reply-To: <16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
Message-ID: <16651e80611242127v796e878bi5783bff564a2a003@mail.gmail.com>

On 11/25/06, Jerry Hill <malaclypse2 at gmail.com> wrote:
> On 23 Nov 2006 15:09:11 -0800, tleeuwenburg at gmail.com
> <tleeuwenburg at gmail.com> wrote:
> > Yes, it's true that you can't resell copies of The Python Papers for
> > personal profits, but you may derive from it, reproduce and propagate
> > it. You're quite right to point it out.
>
> My problem with this is that I can't use anything in your publication
> when working on commercial software.  If I were to derive code from
> something in the Python Papers, my understanding is that I would be
> obligated to release it under a Creative Commons license.  In fact,
> even if all I do is read an article and then incorporate concepts from
> it in my code, my understanding is that I may be creating a derivative
> work.
>
> Since the code that I write for work belongs to my employer, and may
> someday be sold, I need to be careful about the licensing issues. They
> might not be very happy with me if I wrote software for them that
> ended up being encumbered with a license they didn't like.  I don't
> think there's much of a problem with Issue 1, since I don't think I'd
> end up copying the code in the 'Python Coding Idioms' article, and
> MontyLingua is GPL software and thus has its own licensing issues for
> commercial software.  Still, if there was a useful article on, say,
> database or web interfaces, I would have to avoid it.  If I have to
> avoid using any articles that might actually be useful in my
> professional life, I feel like I should probably just avoid the
> journal all together.  If I've misrepresented the relevant copyright
> issues, I'd be happy for someone to correct me.
>
> --
> Jerry
>


From b.prashant at gmail.com  Thu Nov 23 10:41:37 2006
From: b.prashant at gmail.com (prashant)
Date: 23 Nov 2006 07:41:37 -0800
Subject: ImportError: No module named getopt
References: <1164294464.445025.326640@f16g2000cwb.googlegroups.com>
	<mailman.645.1164295394.32031.python-list@python.org>
Message-ID: <1164296497.433163.226290@j72g2000cwa.googlegroups.com>

Thanks for the reply,
I am actually using Cygwin to run a python script.
I have python 2.5 installed. But when i ran the command mentioned by
you... I see that it is looking in the wrong directories... how can i
change these look up directories?


Fredrik Lundh wrote:
> "prashant" wrote:
>
> >I am running a python script which has the line
> >
> > import getopt, sys, os, re, string
> >
> > And i get the error
> >
> > ImportError: No module named getopt
> >
> > Could you please point out a possible solution for this?
>
> looks like a broken installation.  try running the script as
>
>     python -vv script.py
>
> and see where it looks for the getopt module.
>
> is the ImportError all you get, btw ?  it doesn't complain about site.py before
> that ?
> 
> </F>



From amitsoni.1984 at gmail.com  Wed Nov 22 17:45:15 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 22 Nov 2006 14:45:15 -0800
Subject: Quadratic Optimization Problem
In-Reply-To: <1164202718.522744.71060@e3g2000cwe.googlegroups.com>
References: <1164152033.306124.126290@e3g2000cwe.googlegroups.com>
	<45640704$0$5711$9b4e6d93@newsspool3.arcor-online.net>
	<1164202718.522744.71060@e3g2000cwe.googlegroups.com>
Message-ID: <1164235514.969593.24560@m7g2000cwm.googlegroups.com>

thanks, I was actually looking for a package only in python to do this
which can solve it directly. Since my problem is a nonlinear convex
optimization problem, there are a number of algorithms to get it
solved.
I will try using CVXOPT package.

Beliavsky wrote:
> Stefan Behnel wrote:
> > amitsoni.1984 at gmail.com wrote:
> > > I need to do a quadratic optimization problem in python where the
> > > constraints are quadratic and objective function is linear.
> > >
> > > What are the possible choices to do this.
> >
> > Too bad these homework assignments get trickier every time, isn't it?
>
> I think this sarcasm is unjustified. It is not obvious to me that this
> is a homework assignment.
>
> The problem where constraints are linear and the objective function is
> linear (quadratic) is known as linear (quadratic) programming, and
> there are specialized codes for these problems. I don't know of
> software in any language for the particular problem of a linear
> objective function with quadratic constraints, so I would use a general
> algorithm for nonlinearly constrained optimization. Maybe CVXOPT
> http://www.ee.ucla.edu/~vandenbe/cvxopt/ will work for the OP -- I have
> not tried it.
>
> The site http://www.solver.com/probconic.htm calls the problem "conic
> optimization".
>
> A good newsgroup to ask about optimization algorithms is
> sci.math.num-analysis.



From srikrishnamohan at gmail.com  Sun Nov 19 11:28:11 2006
From: srikrishnamohan at gmail.com (km)
Date: Sun, 19 Nov 2006 21:58:11 +0530
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <45608246.7050207@ctypes.org>
References: <mailman.277.1163700699.32031.python-list@python.org>
	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
	<455E1E59.4030501@probo.com>
	<7.0.1.0.0.20061117222832.040fd658@yahoo.com.ar>
	<45608246.7050207@ctypes.org>
Message-ID: <f4cc03640611190828g17b0f3d5o5db63187a180073b@mail.gmail.com>

 i dont see os.startfile in python2.5 installation on my system :-(
KM

On 11/19/06, Thomas Heller <theller at ctypes.org> wrote:
>
> Gabriel Genellina schrieb:
> > At Friday 17/11/2006 17:40, Tim Roberts wrote:
> >
> >> > double wow!  as it is my customer wants me to print to the default
> >> > printer.
> >> > can you please help me with the command for rendering the pdf to the
> >> > printer with acrobat using python?
> >>
> >>You'll have to use the registry to find "acrord32", but once you find
> >>it, you just do:
> >>     os.system( "\\Program Files\\Adobe\\Acrobat
> 7.0\\Reader\acrord32.exe
> >>/p xxx.pdf" )
> >>The /p switch requests printing.
> >
> > Or just let Windows do the dirty work of locating Adobe Reader,
> > figuring out the parameters and such:
> >
> > import win32api
> > win32api.ShellExecute(0, "print", path/to/document.pdf, None, None, 0)
> >
> Note that in Pyhton2.5, os.startfile was extended to accept an optional
> second parameter; so
>   os.startfile(path/to/document.pdf, "print")
> should also work.
>
> Thomas
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From irmen.NOSPAM at xs4all.nl  Sat Nov 11 14:28:41 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 11 Nov 2006 20:28:41 +0100
Subject: Why does this code crash python?
In-Reply-To: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
Message-ID: <4556246a$0$326$e4fe514c@news.xs4all.nl>

Mythmon at gmail.com wrote:
> I am trying to make a program that will basically simulate a chess
> clock in python. To do this I have two threads running, one that
> updates the currently running clock, and one that watches for a
> keypress. I am using the effbot Console module, and that is where I get
> the events for the keypresses. But when I press space it crashes
> shortly after. The program stops, the Console closes, and windows says
> that the program pythonw.exe has had an unexpected reason to shut down.
> I am using python2.5.

Try not (re)using an object created in a certain thread in another thread.
You're creating a console object "c" and use it in both threads.

Try creating the console object for each thread by itself,
i.e. remove the global "c = Console.getconsole()" and replace
it by a getconsole() inside each thread class.

I don't have the Console module so I don't know if it fixes things
for you, but give it a try :)

--Irmen


From fredrik at pythonware.com  Thu Nov 16 05:33:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:33:07 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejheig$jai$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>	<ejhcdm$3pv$1@wake.carmen.se>	<ejhdnt$hq6$1@sea.gmane.org>
	<ejheig$jai$1@sea.gmane.org>
Message-ID: <ejhep2$kva$1@sea.gmane.org>

Steve Holden wrote:

> I'm always surprised by the amount of energy that's put into this type 
> of discussion - even the OP has suggested that this isn't a big issue. 
> If it's not a big issue why is this thread still going?

http://www.bikeshed.org/

</F>



From hollowspook at gmail.com  Sun Nov 26 05:58:30 2006
From: hollowspook at gmail.com (hollowspook)
Date: 26 Nov 2006 02:58:30 -0800
Subject: problem about list indexing
In-Reply-To: <1164538050.587119.190790@n67g2000cwd.googlegroups.com>
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
	<1164533754.269071.149590@n67g2000cwd.googlegroups.com>
	<1164537532.420669.323520@45g2000cws.googlegroups.com>
	<1164538050.587119.190790@n67g2000cwd.googlegroups.com>
Message-ID: <1164538710.829270.44730@45g2000cws.googlegroups.com>

Thanks, bearophile.
range(1, 8) + [10] is great!

"bearophileHUGS at lycos.com ???
"
> hollowspook:
> > how about indexing 1-7, 10
> > [range(1:8),10] will generate [[1, 2, 3, 4, 5, 6, 7], 10], instead of
> > [1, 2, 3, 4, 5, 6, 7, 10]
>
> (Note that range(1:8) is a syntax error).
>
> You can join and extend lists as you like:
>
> >>> range(1, 8) + [10]
> [1, 2, 3, 4, 5, 6, 7, 10]
>
> See also the list.append and list.extend methods too.
> 
> Bye,
> bearophile



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov 30 07:59:45 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 30 Nov 2006 23:59:45 +1100
Subject: Slicing versus loops, was Re: for i in range() anti-pattern
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
	<mailman.835.1164816341.32031.python-list@python.org>
	<pan.2006.11.30.00.38.32.17623@REMOVE.THIS.cybersource.com.au>
	<ekmb29$hj3$02$1@news.t-online.com>
Message-ID: <pan.2006.11.30.12.59.43.951671@REMOVE.THIS.cybersource.com.au>

On Thu, 30 Nov 2006 11:17:17 +0100, Peter Otten wrote:

> Steven D'Aprano wrote:
> 
>> And remember that if alist is truly huge, you may take a performance hit
>> due to duplicating all those megabytes of data when you slice it. 
> 
> Having the same object in two lists simultaneously does not double the total
> amount of memory; you just need space for an extra pointer.

Sure. But if you have millions of items in a list, the pointers themselves
take millions of bytes -- otherwise known as megabytes.


[snip]
>> In my opinion, it actually is harder to understand what it is doing.
>> Swapping two items using "a,b = b,a" is a well known and easily
>> recognised idiom. Swapping two items using "a,b = b,c" is not.
> 
> That example was chosen to prove your point. 

Well, I thought about choosing an example that disproved my point, but I
couldn't think of one :-)

> The real contender for the "swap items" problem are slices.
> 
> def swap_slice(items):
>     left = items[::2]
>     items[::2] = items[1::2]
>     items[1::2] = left
>     return items

I always forget that extended slices can be assigned to as well as
assigned from! Nice piece of code... if only it worked.

>>> def swap_slice(items):
...     left = items[::2]
...     items[::2] = items[1::2]
...     items[1::2] = left
...     return items
...
>>> alist
[0, 1, 2, 3, 4]
>>> swap_slice(alist)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 3, in swap_slice
ValueError: attempt to assign sequence of size 2 to extended slice of size 3

Everybody always forgets corner cases... like lists with odd number of
items... *wink*

Here is a version that handles both odd and even length lists:

def swap_slice(items):
    left = items[:len(items)-1:2]
    items[:len(items)-1:2] = items[1::2]
    items[1::2] = left
    return items


Replacing the explicit Python for loop with an implicit loop in C makes it
very much faster.


-- 
Steven.



From no-spam at no-spam-no-spam.invalid  Fri Nov 24 11:42:36 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 17:42:36 +0100
Subject: Pimping the 'cgi' module
In-Reply-To: <mailman.676.1164379226.32031.python-list@python.org>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com><mailman.670.1164364120.32031.python-list@python.org><ek6ncq$7pp$1@news.albasani.net>	<200611241404.23599.email@christoph-haas.de>
	<mailman.676.1164379226.32031.python-list@python.org>
Message-ID: <ek77e0$5h4$1@news.albasani.net>

Fredrik Lundh wrote:
> Christoph Haas wrote:
> 
>>> well, note, for that they have named it Ruby-On-Rails, so its still the
>>> language - leveraged. While it is Zope/Django/Ego-on-Python ... ?
>> If by that you mean that neither Zope nor Django are exactly pythonic I
>> think I concur.
> 
> Django is highly Pythonic (it's pure Python plus templates, and has the same
> "pencil-like qualities" as Python itself).  Zope 3 is highly Pythonic too, but a
> rather more advanced form of Python.  but they're both application servers,
> not CGI scripting environments.

pythonic yes, but ..-on-python

>>> First need of course: an update of that cgi "module".
>> Oh, yeah. I just joined the Web SIG and found out that WSGI seems the way
>> to go. At a first look it seems horrible if you just want to provide a CGI
>> module.
> 
> WSGI is a CGI replacement, not a CGI implementation.  Which is a good thing,
> because what really matters, if you think about what a web server is doing, is the
> HTTP protocol, not an old and not always practical httpd extension standard.
> WSGI simply provides plumbing for working very close to the HTTP level.
> 
> (you can of course create a WSGI-compatible adapter for CGI in no time at
> all, but that's not really the point of WSGI).

its a low level tech basis. Regarding the discussion here, its also the enabler for the confusion :-)

>> Somehow I sadly feel I would just add another incomplete  framework to that
>> pile.
> 
> as they say, if you don't understand history, you're bound to repeat it ;-)

we are currently bound to repeat 30+ histories. no wonder - nobody will ever understand it and go to Rails & Co.

>> I'm especially unsure whether it's good or bad to create another "I'm sick
>> of the standard library"-style module. I've just become a bit less
>> confident to actually contribute something useful there. Overwhelming.
> 
> Building a "like cgi.py, but with more support for the kind of things people actually
> need" library would be an excellent idea.  It's not clear from your posts that you
> "get" what things like Django and Zope do, and how that's different from "CGI
> programming", but if you have a deep understanding of the latter, I'm sure you
> could come up with a nice "cgi2.py" library with relatively little effort.  Get to
> work!

think both are missing standard modules: cgi2 and a comfortable OO-dispatcher/server with clear tutorials. And to have them in front on the Python display window.


Robert


From bignose+hates-spam at benfinney.id.au  Mon Nov 13 15:26:04 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 14 Nov 2006 07:26:04 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <87odrbgkkj.fsf@benfinney.id.au>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> personally, i don't mind the colon and see no need to lose it, but
> if we are talking in the realm of aesthetics, it actually seems like
> it would be cleaner if it weren't there...sure, at first everyone
> who is used to it might feel like something is missing, or the line
> is "hanging" open, but overall the less characters, the better,
> right? isn't that why the braces are gone?

No. "The fewer characters, the better" is not right. Such absolutes
are to be avoided.

Sometimes, as in the case of omitting block-enclosing braces, removing
characters results in better readability. Other times, as in the case
of explicit names for objects, *more* characters results in better
readability -- but only up to a point.

Readability doesn't vary directly or inversely with the number of
characters, even though it is affected when they change.

-- 
 \      "I bought a self learning record to learn Spanish. I turned it |
  `\        on and went to sleep; the record got stuck. The next day I |
_o__)                could only stutter in Spanish."  -- Steven Wright |
Ben Finney



From bj_666 at gmx.net  Thu Nov  9 05:05:14 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 09 Nov 2006 11:05:14 +0100
Subject: Sorted list - how to change it
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.09.10.05.13.352443@gmx.net>

In <1163065969.593970.165600 at b28g2000cwb.googlegroups.com>, Lad wrote:

> I have a sorted list for example [1,2,3,4,5] and I would like to change
> it in a random way
> e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
> ordered.

lst = [1, 2, 3, 4, 5]
tmp = list(lst)
while lst == tmp:
    random.shuffle(lst)

If you *really* want to be sure it's not sorted after shuffling.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From onurb at xiludom.gro  Thu Nov 16 11:53:19 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 17:53:19 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.241.1163673613.32031.python-list@python.org>
References: <455ba1a9$0$4218$426a74cc@news.free.fr>	<1a2e01c7090d$f074cdc0$0301a8c0@tmesa.com>
	<mailman.241.1163673613.32031.python-list@python.org>
Message-ID: <455c9781$0$20545$426a74cc@news.free.fr>

(replying to bruce - the post doesn't show up here)
> bruce wrote:
>> ummm bruno...
>>
>> you don't 'need' apache to run php.

Yes, true, you can also install the cli version. Which has lots of
restrictions BTW.

>> in fact, although i'm from the old hard c/c++ world.... way before web
>> apps,

Web apps are not where I learned programming...

>> i haven't really found much for most general apps (not ui/not threaded
>> stuff) that php can't do..

I haven't really found much for most general apps that assembler can't
do - it's just too painful... !-)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From paul at boddie.org.uk  Mon Nov  6 05:55:09 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Nov 2006 02:55:09 -0800
Subject: Is there any python lib for calling CVS api?
References: <1162804318.492725.245410@f16g2000cwb.googlegroups.com>
Message-ID: <1162810509.523809.158260@k70g2000cwa.googlegroups.com>

ironpythonster at gmail.com wrote:
> Hi everyone, this should be a quick question.  I'm writing some scripts
> to take some file and move them into a CVS repository, but it's pretty
> slow, because it uses system calls to execute the CVS commands.

[...]

> anyway, if anyone knows of a useful module, I'd love to hear about it.

You might get some ideas from ViewVC if you're accessing the repository
directly:

http://www.viewvc.org/

There may be scripts out there which import data from various other
revision control systems into CVS, although the focus these days seems
to be on *exporting* data from CVS and putting it into things like
Subversion, Bazaar, Mercurial and so on, but I believe the scripts for
the latter two are Python programs and may also provide some
inspiration.

Paul



From arkanes at gmail.com  Thu Nov 16 11:10:48 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 16 Nov 2006 10:10:48 -0600
Subject: ini files and plugins
In-Reply-To: <455c7d58$0$21668$426a74cc@news.free.fr>
References: <455c7d58$0$21668$426a74cc@news.free.fr>
Message-ID: <4866bea60611160810r34da2b14g924d4af736189290@mail.gmail.com>

On 11/16/06, tool69 <kib2 at free.fr> wrote:
> Hi,
> I've made a basic LaTeX file editor in wxPython, but now I wanted to add
> it some features :
>
> 1 -  create a sort of ini file where I can put the user configuration
> that will load itself on the application startup ;

wxPython includes a configuration management system, it's a bit more
powerful and flexible than just using ConfigParser. See the wx.Config
classes (I believe theres some code in the demo as well)

> 2 -  a simple plugin system with python files ( maybe to add new
> langages, etc.) ;
>
> I'm looking for simple articles, modules or code snippets on these
> subjects;
> thanks,
> 6TooL9
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From jstroud at mbi.ucla.edu  Fri Nov  3 18:32:45 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 03 Nov 2006 23:32:45 GMT
Subject: Python Classes and dynamic class members
In-Reply-To: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>
References: <1162596614.073100.54850@e3g2000cwe.googlegroups.com>
Message-ID: <xkQ2h.21568$TV3.20249@newssvr21.news.prodigy.com>

acatejr at gmail.com wrote:
> I have a text file that I am parsing.  Each line is of the form:
> 
> max_time  0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
> 
> The first item is the field name and the next twelve items are values
> for each month in the year.  There are multiple lines each for some
> different variable.  I am able to parse this data easily enough, but
> what I'd like to do is have a class that stores all this infomormation
> using dynamic member attributes/fields and the resulting list of
> values.  For example, if the class WeatherData was instantiated and I
> parsed the line above as so:
> 
> field_name = "max_time;
> values = [0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
> 
> how could I get weather data to store values in an attribute called
> "max_time"?  Ultimately, something like this would be possible:
> 
> 
>>>>WeatherData.max_time
>>>>[0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10,0.11,0.12]
> 
> 
> Any help would be appreciated.
> 
setattr(Weatherdata, "max_time", max_time)

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From finnegan.patrick at gmail.com  Fri Nov 24 05:02:44 2006
From: finnegan.patrick at gmail.com (Patrick Finnegan)
Date: 24 Nov 2006 02:02:44 -0800
Subject: Modules - Jython Vs Python?
Message-ID: <1164362564.763699.313360@45g2000cws.googlegroups.com>

How many of the Python modules written in C have been rewritten and and
ported to Java to run under Jython? I am talking about SMTP, LDAP,
WIN2K,XML etc.  Is there a list anywhere ?

Thanks

Patrick.



From eduardo.padoan at gmail.com  Thu Nov  2 19:50:37 2006
From: eduardo.padoan at gmail.com (eduardo.padoan at gmail.com)
Date: 2 Nov 2006 16:50:37 -0800
Subject: other ways to check for <type 'function'>?
In-Reply-To: <mailman.1670.1162486194.11739.python-list@python.org>
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
	<1162477269.980535.202320@h48g2000cwc.googlegroups.com>
	<1162478431.624590.29290@m7g2000cwm.googlegroups.com>
	<mailman.1667.1162483361.11739.python-list@python.org>
	<1162484302.234145.245320@e3g2000cwe.googlegroups.com>
	<mailman.1670.1162486194.11739.python-list@python.org>
Message-ID: <1162515037.427613.279250@i42g2000cwa.googlegroups.com>

Python should have a TypeError subclass: "NotCallableError", to enforce
BAFP.



From elicriffield at gmail.com  Mon Nov 13 14:30:16 2006
From: elicriffield at gmail.com (Eli Criffield)
Date: 13 Nov 2006 11:30:16 -0800
Subject: tab compleation input
In-Reply-To: <1163441927.046482.218330@e3g2000cwe.googlegroups.com>
References: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>
	<1163441927.046482.218330@e3g2000cwe.googlegroups.com>
Message-ID: <1163446215.993860.325430@h48g2000cwc.googlegroups.com>


Not sure what your trying to do, but it doesn't work. :)
valid doesn't exsist,  and if you make vaid =
sys.stdin.readline().rstrip(), then answer doesn't exsist.

Either way, it doesn't take the tab tell after you hit enter, Not
really what i was getting at. What i want is like a bash shell prompt.
>From a bash shell prompt try ls <TAB> <TAB>, like that. (readline does
that for bash, but i don't know how to get readline to do anything but
python commands in python).

Eli

dakman at gmail.com wrote:
> On a gui on this would be a little bit easier but it's a completley
> diffrent realm when doing it in the console. It makes it a little more
> difficult when using stdin.readline() because you can only read line by
> line. Here is my implmentation.
>
> import sys
>
> validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]
> while True:
>     sys.stdout.write("Answer the Question: ")
>     answer = sys.stdin.readline().rstrip()
>     for valid in validanswers:
>         if valid.startswith(answer.strip("\t")):
>             answer = valid
>     else:
>         print "Invalid Answer: Please enter a valid answer"
>         continue
>     break
> print "You have answered, ", answer
>
> I'm at school and wasn't able to test it, but it looks like it should
> work.
>
> Eli Criffield wrote:
> > Here is what i want to do. I have a question in my program, and i want
> > to do tab completion for the valid answers.
> >
> > Say i have :
> > --snip--
> > validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]
> >
> > #and i ask
> >
> > sys.stdout.write("Answer the Question: ")
> > answer = sys.stdin.readline().rstrip()
> > if answer not in valid answers:
> >   print "Wrong!"
> > --snip--
> >
> > But what i want is when i enter the answer i can hit tab and it'll
> > complete one of the validanswers
> > I know i can do tab complete with readline and 'raw_input('> ')' but
> > that's only to execute python commands right?
> > 
> > Eli



From sturlamolden at yahoo.no  Sun Nov 12 18:16:25 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Nov 2006 15:16:25 -0800
Subject: numpy/scipy: correlation
In-Reply-To: <ej7plg$sa7$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
Message-ID: <1163373385.596233.102100@k70g2000cwa.googlegroups.com>


robert wrote:

> > t = r * sqrt( (n-2)/(1-r**2) )

> yet too lazy/practical for digging these things from there. You obviously got it - out of that, what would be a final estimate for an error range of r (n big) ?
> that same "const. * (1-r**2)/sqrt(n)" which I found in that other document ?

I gave you th formula. Solve for r and you get the confidence interval.
You will need to use the inverse cumulative Student t distribution.

Another quick-and-dirty solution is to use bootstrapping.

from numpy import mean, std, sum, sqrt, sort
from numpy.random import randint

def bootstrap_correlation(x,y):
   idx = randint(len(x),size=(1000,len(x)))
   bx = x[idx] # reasmples x with replacement
   by = y[idx] # resamples y with replacement
   mx = mean(bx,1)
   my = mean(by,1)
   sx = std(bx,1)
   sy = std(by,1)
   r = sort(sum( (bx - mx.repeat(len(x),0).reshape(bx.shape)) *
      (by - my.repeat(len(y),0).reshape(by.shape)), 1) /
((len(x)-1)*sx*sy))
   #bootstrap confidence interval (NB! biased)
   return (r[25],r[975])


> My main concern is, how to respect the fact, that the (x,y) points may not distribute well along the regression line.

The bootstrap is "non-parametric" in the sense that it is distribution
free.



From timothy at open-networks.net  Thu Nov 16 02:44:37 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 16 Nov 2006 17:44:37 +1000
Subject: Secure Python
In-Reply-To: <pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
Message-ID: <455c1665@quokka.wn.com.au>

Steven D'Aprano wrote:
> On Thu, 16 Nov 2006 04:02:58 +0100, Fredrik Tolf wrote:
> 
> 
>>Hi List!
>>
>>I was thinking about secure Python code execution, and I'd really
>>appreciate some comments from those who know Python better than I do.
>>
>>I was thinking that maybe it could be possible to load and run untrusted
>>Python code, simply by loading it in a module with a modified version of
>>__builtins__. Without any reachable function that do unsafe operations,
>>code running from there shouldn't be able to do evil things.
> 
> 
> How would you prevent a Denial Of Service attack like this?
> 
> # don't try this at home kids! leave this to the professionals!
> n = 10000**4
> L = []
> for i in range(n):
>     L.append(str(2L**n))
> 
> Here's an interesting one. Bug or deliberate attack?
> 
> 
> def evens():
>     # iterator returning even numbers
>     i = 0
>     while True:
>         yield i
>         i += 2
> # now get all the even numbers up to 15
> L = [n for n in evens() if n < 15]
> 
> 
> 

congraulations you have discovered loops and their misuse


From mail at microcorp.co.za  Mon Nov  6 01:48:03 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 6 Nov 2006 08:48:03 +0200
Subject: Is there a way to define a true global across modules?
References: <005d01c6ff5e$2b5d95c0$03000080@hendrik><eifus3$b9o$1@news.albasani.net><mailman.1752.1162618751.11739.python-list@python.org>
	<1162775885.601152.78080@e3g2000cwe.googlegroups.com>
Message-ID: <016501c70170$41e46300$03000080@hendrik>

 "alex23" <wuwei23 at gmail.com> wrote:

> Hendrik van Rooyen wrote:
> > "robert" <no-spam at no-spam-no-spam.invalid> wrote:
> > > Fredrik Lundh wrote:
> > > >
http://www.effbot.org/pyfaq/how-do-i-share-global-variables-across-modules.htm
>
> > > Or worse style - if you are too lazy to create a extra global variables
module
> > > (ab)use the __main__ module als "global":
> > > import __main__
> > > __main__.mysemphore += 1
>
> > Thanks - how could you possibly have guessed that I am lazy - does it show
that
> > much?  *WEG*
>
> You could merge the two approaches and bind a more explicit name to
> __main__:
>
> import __main__ as config
>
> config.mysemaphore = 0
>
> It's a little clearer what you're subverting __main__ for here :)
>
> - alex23

Thanks - clever and clear!

- Hendrik



From gagsl-py at yahoo.com.ar  Fri Nov 17 20:50:59 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 17 Nov 2006 22:50:59 -0300
Subject: notify on directory changes
In-Reply-To: <455e3a83$0$560$b45e6eb0@senator-bedfellow.mit.edu>
References: <455e3a83$0$560$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <7.0.1.0.0.20061117224739.040fa8a8@yahoo.com.ar>

At Friday 17/11/2006 19:41, Josh wrote:

>Does python have a way of registering a callback - or through some other
>mechanism - to notify me when a directory listing has changed, or if a file
>has been modified, deleted, created, etc.? I'm looking for behavior similar
>to the .net class FileSystemWatcher. I would also be interested to know if
>there exists a portable c or c++ solution, too.
>thanks!

Not one, but three ways: 
http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html
The only portable way I can think of is the first: polling the 
directory contents at intervals.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From cjw at sympatico.ca  Thu Nov 30 18:14:11 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 30 Nov 2006 18:14:11 -0500
Subject: Python25.zip
Message-ID: <eknok9$gjp$1@sea.gmane.org>

As part of the Python initialization, C:\Windows\System32\Python25.zip 
is set up in the path.

I haven't seen any documentation on the use or purpose of the zip file.

Colin W.



From exarkun at divmod.com  Thu Nov 16 19:01:48 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 16 Nov 2006 19:01:48 -0500
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <455CF4BA.1050608@v.loewis.de>
Message-ID: <20061117000148.20948.2116628001.divmod.quotient.30245@ohm>

On Fri, 17 Nov 2006 00:31:06 +0100, "\"Martin v. L?wis\"" <martin at v.loewis.de> wrote:
>gabor schrieb:
>>> All this code will typically work just fine with the current behavior,
>>> so people typically don't see any problem.
>>>
>>
>> i am sorry, but it will not work. actually this is exactly what i did,
>> and it did not work. it dies in the os.path.join call, where file_name
>> is converted into unicode. and python uses 'ascii' as the charset in
>> such cases. but, because listdir already failed to decode the file_name
>> with the filesystem-encoding, it usually also fails when tried with
>> 'ascii'.
>
>Ah, right. So yes, it will typically fail immediately - just as you
>wanted it to do, anyway; the advantage with this failure is that you
>can also find out what specific file name is causing the problem
>(whereas when listdir failed completely, you could not easily find
> out the cause of the failure).
>
>How would you propose listdir should behave?

Umm, just a wild guess, but how about raising an exception which includes
the name of the file which could not be decoded?

Jean-Paul


From john106henry at hotmail.com  Sun Nov 19 12:38:04 2006
From: john106henry at hotmail.com (John Henry)
Date: 19 Nov 2006 09:38:04 -0800
Subject: Why isn't SPLIT splitting my strings
In-Reply-To: <mailman.471.1163953806.32031.python-list@python.org>
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
	<1163932286.420652.100100@f16g2000cwb.googlegroups.com>
	<1163952617.270591.279730@j44g2000cwa.googlegroups.com>
	<1163952691.372592.76110@k70g2000cwa.googlegroups.com>
	<mailman.471.1163953806.32031.python-list@python.org>
Message-ID: <1163957883.949380.50560@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> John Henry wrote:
>
> > Oops!
>
> for cases like this, writing
>
> 	"[" + re.escape(charset) + "]"
>

So, like this?

newString= re.split("[" + re.escape("; ()[]") + "]", result)

> is usually a good way to avoid repeated oops:ing.
>
>  > newString= re.split("[; ()\[\]", result)
>
>  >>> newString= re.split("[; ()\[\]", result)
> Traceback (most recent call last):
>     ...
> sre_constants.error: unexpected end of regular expression
>

Strange.  It works for me.  Oh, I know, it's missing a "]".

newString= re.split("[; ()\[\]]", result)

> </F>



From mike at hobbshouse.org  Mon Nov 13 15:23:31 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 14:23:31 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejags8$l2u$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>
	<ejags8$l2u$1@sea.gmane.org>
Message-ID: <4558D443.1030802@hobbshouse.org>

Ron Adam wrote:
> Michael Hobbs wrote:
>   
>> Ron Adam wrote:
>>     
>>> LOL,  of course it would.  I would expect that too after a suitable amount of 
>>> 'brain washing', oops, I mean training and conditioning. ;-)
>>>   
>>>       
>> Trust me, my brain is quite filthy and doesn't wash easily. I do 
>> appreciate aesthetics, which is why still stay with Python, even after 
>> programming in Ruby for several months. I've used Java/C/C++ for years, 
>> yet I make no complaint about the lack of static typing in Python. Even 
>> so, I'd like to think that I know a good thing when I see it.
>>     
>
> I find if I approach things on a learning basis and always presume there are 
> things I still don't know.  I then tend to get much more help and support than 
> if I approach things on a 'I'm right/your wrong' basis.  Also, if I do turn out 
> to have a point a view that is not exactly right, it is then much easier for me 
> to take a new position or even the reverse position and move on.
>
>   
To clarify my position, I'm not intentionally being contradictory. In 
fact, when I first posed my question, I asked if anyone had a good 
reason for why the redundancy should continue to exist. Expecting to get 
a nice grammatical counter-example, the only viable answer that anyone 
could come up with is the FAQ answer that it improves readability. Since 
then, I've been fighting my point that the colon really doesn't improve 
readability all that much.

In the end, I have to admit that I really couldn't give a flying frog if 
the colon is there or not. It's just a colon, after all. I *was* hoping 
that I could convince someone to honestly think about it and consider if 
the colon is really that noticeable. But so far, the only response that 
I've received is that there's that ABC study somewhere and that settles 
that.

- Mike



From no-spam at no-spam-no-spam.invalid  Thu Nov  9 14:24:35 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 09 Nov 2006 20:24:35 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7xy7qlom0b.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162947569.228388.16940@m7g2000cwm.googlegroups.com>
	<eit1ab$q9j$1@news.albasani.net>
	<7xy7qlom0b.fsf@ruckus.brouhaha.com>
Message-ID: <eivv9k$uoe$1@news.albasani.net>

Paul Rubin wrote:
> robert <no-spam at no-spam-no-spam.invalid> writes:
>> what about speed. Is it true that IronPython is almost as fast as C-Python meanwhile?
>>
>> When this all is really true, its probably a proof that putting out
>> LOCK-INC-lock's (on dicts, lists, mutables ...) in CPython to remove
>> the GIL in future should not be really so expensive as it was teached
>> in the past :-)
> 
> I don't think IronPython uses locks that way.  AFAIK it doesn't use
> reference counts, and relies on user-supplied synchronization to keep
> stuff like dictionaries safe.

thus there would be crash if 2 threads use the global variables (module.__dict__) of a module?
Cannot imagine .. that would would break most reasons for nice python threading.

-robert


From fredrik at pythonware.com  Mon Nov 13 14:23:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 20:23:19 +0100
Subject: HTML Parsing and Indexing
In-Reply-To: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
References: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
Message-ID: <ejagn7$k2c$1@sea.gmane.org>

mailtogops at gmail.com wrote:

> I need a help on HTML parser.

http://www.effbot.org/pyfaq/tutor-how-do-i-get-data-out-of-html.htm

</F>



From xi at gamma.dn.ua  Sat Nov 18 14:01:04 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 21:01:04 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
Message-ID: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>

Hi,

Could anyone suggest me a simple IDE suitable for teaching Python as a
first programming language to high school students?  It is necessary
that it has a good support for input/output in Cyrillic.

Unfortunately, most IDEs I tried failed miserably in this respect.  My
test was simple: I've run the code
    name = raw_input("What's your name? ")  # written in Russian
    print "Hello, %s!" % name               # in Russian as well
both from the shell and as a standalone script. This either caused a
UnicodeError or just printed invalid characters.

For the record, I've checked IDLE, PythonWin, Eric, DrPython, SPE, and
WingIDE.  The only ones that worked are WingIDE and IDLE (under Linux,
but not under Windows).


Thanks,
Kirill


From p.lavarre at ieee.org  Wed Nov  8 18:10:01 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 8 Nov 2006 15:10:01 -0800
Subject: pack a three byte int
Message-ID: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>

Can Python not express the idea of a three-byte int?

For instance, in the working example below, can we somehow collapse the
three calls of struct.pack into one?

>>> import struct
>>>
>>> skip = 0x123456 ; count = 0x80
>>>
>>> cdb = ''
>>> cdb += struct.pack('>B', 0x08)
>>> cdb += struct.pack('>I', skip)[-3:]
>>> cdb += struct.pack('>BB', count, 0)
>>>
>>> print ' '.join(['%02X' % ord(xx) for xx in cdb])
08 12 34 56 80 00
>>>

I ask because I'm trying to refactor working code that is concise:

>>> cdb0 = '\x08' '\x12\x34\x56' '\x80' '\0'
>>> print ' '.join(['%02X' % ord(xx) for xx in cdb0])
08 12 34 56 80 00
>>>

Thanks in advance, Pat LaVarre



From aahz at pythoncraft.com  Wed Nov 15 17:20:37 2006
From: aahz at pythoncraft.com (Aahz)
Date: 15 Nov 2006 14:20:37 -0800
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
	<1163322853.760315.51040@k70g2000cwa.googlegroups.com>
	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
Message-ID: <ejg3rl$iah$1@panix3.panix.com>

In article <455b82a0$0$7054$c3e8da3 at news.astraweb.com>,
John Salerno  <johnjsal at NOSPAMgmail.com> wrote:
>John Machin wrote:
>>
>> Here in Austraila, (I expect this is common to most countries), there
>> are people who are utterly clueless about elementary data model rules,
>> like identification "numbers" should be kept as strings.
>
>Do you mean that ID numbers that serve as a primary key in a database 
>should also be strings?

Depends.  If they are strictly internal, ints are fine.  But if they
interact with the outside world, they should be strings.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From codecraig at gmail.com  Mon Nov 20 09:32:14 2006
From: codecraig at gmail.com (abcd)
Date: 20 Nov 2006 06:32:14 -0800
Subject: pysqlite -- anyone have the windows installer for Python 2.4?
Message-ID: <1164033134.866114.182320@h54g2000cwb.googlegroups.com>

anyone have the windows installer for Python 2.4 of pysqlite2???  their
site is down and I need it.

thanks in advance.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Nov 19 07:21:20 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Nov 2006 13:21:20 +0100
Subject: syntax error in sum(). Please explicate.
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
	<7xbqn45qh7.fsf@ruckus.brouhaha.com>
Message-ID: <4sb0i0Furjq2U2@mid.individual.net>

Paul Rubin wrote:

> Generator comprehensions

Are generator comprehensions and generator expressions the same?

Regards,


Bj?rn

-- 
BOFH excuse #35:

working as designed



From ak at silmarill.org  Tue Nov 21 09:05:47 2006
From: ak at silmarill.org (Rainy)
Date: 21 Nov 2006 06:05:47 -0800
Subject: Vim scripts for editing Python?
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
	<1164089307.390351.263980@j44g2000cwa.googlegroups.com>
Message-ID: <1164117947.465994.246510@k70g2000cwa.googlegroups.com>


Bill Pursell wrote:
> Rainy wrote:
> > Hi, did anyone make a good set of scripts for editing Python in Vim? I
> > know there is one on vim.org but it isn't very advanced. thx..
>
> What functionality are you looking for?

For example, to auto-fold all function bodies while leaving the
function names visible. To indent after ':' but only when it's at the
end of line. Also to auto-close braces like [], (), {}, autoclose
quotes. Complete all standard lib module functions, and imported
functions. I don't exactly remember how much of this was done by the
script that is posted on vim.org.. I recall it was missing some things
and some others it had didn't work exactly right at all times.. But
that was a while ago.



From ratchetgrid at googlemail.com  Sat Nov 25 19:55:19 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sun, 26 Nov 2006 00:55:19 +0000
Subject: Graph Data Structures
In-Reply-To: <1164498771.236820.232180@l12g2000cwl.googlegroups.com>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
	<1164495892.406863.10090@m7g2000cwm.googlegroups.com>
	<mailman.726.1164497654.32031.python-list@python.org>
	<1164498771.236820.232180@l12g2000cwl.googlegroups.com>
Message-ID: <676224240611251655v3bfb68b4taf007cf8e94b0e5e@mail.gmail.com>

Hi,

It seems that by just going through the problem writing out a better
explanation for the reply I have figured out a solution and the
problem isnt as difficult as I thought it would be.

What is a wontok?

Thanks

Nathan

PS --> the start of my reply:

class Interval(object):
     _id = "gene1"
      _start = 50
     _end = 200
     _strand = 1

class Sequence(object):
    _sequence = "atgtcgtgagagagagttgtgag................."

> Only vaguely. You use several terms which appear to be from your trade
> jargon

Sequence is a string made from a restricted alphabet (A,T,G,C...).
Sequences can be aligned:          1     ATGCTGCAT
                                                      2     TAGCTGTTA
                                                                  -------
                                                                 2        5

I m trying to represent this as a graph Interval(id=1, start=2, end=6,
strand=1) ---edge------Interval(id=2, start=2, end=6, strand=1)

The problem is I was planning on storing the sequences in a dictionary
{id:Seq}, however each dictionary would represent a different source
of sequences. File1, File2....... (
STORE THE SOURCES AS A DICT AND HAVE SOURCE IN INTERVAL ASWELL


From franz.steinhaeusler at gmx.at  Fri Nov 17 02:48:19 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Fri, 17 Nov 2006 08:48:19 +0100
Subject: [wxPython] wxFrame don't have Bind attribute ??
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
Message-ID: <u5qql211p8h7sprc47mhotju26cc7dlivj@4ax.com>

On 29 Oct 2006 22:31:09 -0800, "Jia Lu" <Roka100 at gmail.com> wrote:

>Hi all
> I am using wxPy 2.6.3.2-2, But when run an application with self.Bind
>, I got an error that there is no Bind.
>
> How can I fix it. thanx

Is it really an instance of wx.Frame? 
What do you get, if you make a "print self" statement?


From sxn02 at yahoo.com  Tue Nov  7 11:24:36 2006
From: sxn02 at yahoo.com (Sorin Schwimmer)
Date: Tue, 7 Nov 2006 08:24:36 -0800 (PST)
Subject: But it was yesterday here!
Message-ID: <20061107162436.99027.qmail@web56003.mail.re3.yahoo.com>

(the quote is from 'Le gendarme et les extra-terrestres', a must-see Frech comedy)

Hi All,

I'm trying to use the smtplib - I did it so many times already. The import statement fails, as the
SMTP name cannot be imported. Digging more, I found that SMTP fails because
email.base64MIME cannot be imported (ImportError:No module named base64MIME).
I don't understand why, as the file is in the right location, has the correct access rights (I'm on
Linux), and it's content is not corrupt. I also tried to import email.__init__ and end up with the same error.

The only way that works is to navigate to the email directory and perform the import base64MIME there.

What may have happened?

Thanks,
Sorin



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From http  Fri Nov  3 19:29:16 2006
From: http (Paul Rubin)
Date: 03 Nov 2006 16:29:16 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
Message-ID: <7xk62ct5pf.fsf@ruckus.brouhaha.com>

robert <no-spam at no-spam-no-spam.invalid> writes:
> > I don't want to discourage you but what about reference
> > counting/memory
> > management for shared objects? Doesn't seem fun for me.
> 
> in combination with some simple locking (anyway necessary) I don't
> see a problem in ref-counting.
> If at least any interpreter branch has a pointer to the (root)
> object in question the ref-count is >0. ----
> Question Besides: do concurrent INC/DEC machine OP-commands execute
> atomically on Multi-Cores as they do in Single-Core threads?

Generally speaking, no, the inc/dec instructions are not atomic.  You
can do an atomic increment on the x86 using LOCK XCHG (or maybe LOCK
INC is possible).  The thing is that the locking protocol that
guarantees atomicity is very expensive, like 100x as expensive as an
unlocked instruction on a big multiprocessor.  So yes, of course you
could accomplish reference counting through locks around the ref
counts, but performance suffers terribly.  The solution is to get rid
of the ref counts and manage the entire heap using garbage collection.

For stuff like dictionary access, there are protocols (again based on
LOCK XCHG) that don't require locking for lookups.  Only updates
require locking.  Simon Peyton-Jones has a good paper about how it's
done in Concurrent Haskell:

  http://research.microsoft.com/~simonpj/papers/stm/stm.pdf

This is really cool stuff and has found its way into Perl 6.  I'd like
to see Python get something like it.


From jacob.rael at gmail.com  Tue Nov 28 12:46:04 2006
From: jacob.rael at gmail.com (Jacob Rael)
Date: 28 Nov 2006 09:46:04 -0800
Subject: Reading GDSII layouts
In-Reply-To: <mailman.796.1164712312.32031.python-list@python.org>
References: <mailman.796.1164712312.32031.python-list@python.org>
Message-ID: <1164735963.999050.300530@45g2000cws.googlegroups.com>

Funny, I started writing one this past weekend as a learning exercise
(handling large files and start to use classes). If ipkiss does not
work out, let me know specifically what you need and maybe my hack will
work.

jr


Vincent Arnoux wrote:
> Hello,
> I am looking for a library for reading GDSII layout files structures (hierarchy, cells names, ...).
> I found IPKISS (http://www.photonics.intec.ugent.be/research/facilities/design/ipkiss/default.htm),
> but it looks to be a generator and not a reader.
> 
> Thank you,
> Vincent



From fredrik at pythonware.com  Thu Nov 23 06:00:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 12:00:34 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <ek3uqa$8lm$1@sea.gmane.org>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
	<ek3uqa$8lm$1@sea.gmane.org>
Message-ID: <ek3v0k$8lm$2@sea.gmane.org>

> distinct identifies

don't trust your spellchucker.

</F>



From p.lavarre at ieee.org  Fri Nov 10 08:42:03 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 05:42:03 -0800
Subject: announce: FAQs suggested
Message-ID: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>

http://effbot.org/pyfaq/suggest.htm has new FAQ's:

FAQ: How do I ask to exit from a doctest
FAQ: How do I say unsigned char in ctypes?
FAQ: How do I say returns void in ctypes?
FAQ: How do I calculate what quoted strings and numbers mean?

Enjoy, Pat LaVarre



From XX.XmcX at XX.XmclaveauX.com  Wed Nov 22 10:35:20 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Wed, 22 Nov 2006 16:35:20 +0100
Subject: file backup in windows
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
Message-ID: <mn.b3e37d6b39064fe7.46195@XX.XmclaveauX.com>

Hi!

" are your friend.

See, also:
   filepath = '"%HOMEPATH%\\LocalSettings\\Application 
Data\\Microsoft\\Outlook\\*"'

and  %USERPROFILE%  %APPDATA% etc.

-- 
@-salutations

Michel Claveau




From kibleur.christophe at gmail.com  Thu Nov 23 05:02:20 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 23 Nov 2006 02:02:20 -0800
Subject: Finding the carret position in a regular expression
In-Reply-To: <mailman.628.1164275825.32031.python-list@python.org>
References: <1164274616.881372.276400@l39g2000cwd.googlegroups.com>
	<mailman.628.1164275825.32031.python-list@python.org>
Message-ID: <1164276140.560386.27910@l39g2000cwd.googlegroups.com>

Thanks Fredrik,
I was not aware of finditer. Iterators are very usefull !



From vinjvinj at gmail.com  Thu Nov 16 13:32:37 2006
From: vinjvinj at gmail.com (vj)
Date: 16 Nov 2006 10:32:37 -0800
Subject: Has anyone generated Open Office Calc XML files from python
In-Reply-To: <mailman.278.1163700981.32031.python-list@python.org>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
	<mailman.278.1163700981.32031.python-list@python.org>
Message-ID: <1163701957.386820.197670@m73g2000cwd.googlegroups.com>


>      http://ooopy.sourceforge.net/

I downloaded the package. unfortunately there are no examples that come
with. I found another python package which is more geared to creating
simple calc objects from python at. Apparently it is a port of the perl
library.

http://sourceforge.net/project/showfiles.php?group_id=87437

Here is one of the examples from the library. Seems pretty simple and
exactly what I was looking for:

-----------------------------------------------------------------------
import ooolib

# Create your document
doc = ooolib.Calc()

# Set values.  The values are set in column, row order, but the values
are
# not in the traditional "A5" style format.  Instead we require two
integers.
# set_cell_value(col, row, datatype, value)
for row in range(1, 9):
	for col in range(1, 9):
		doc.set_cell_value(col, row, "float", col * row)

# Save the document to the file you want to create
doc.save("calc-example01.ods")

-----------------------------------------------------------------------
VJ



From Thomas.Ploch at gmx.net  Thu Nov 16 10:13:12 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: 16 Nov 2006 07:13:12 -0800
Subject: Tkinter & Python 2.5 Problems on MAC OS 10.3.9
In-Reply-To: <455C64AA.60705@kevin-walzer.com>
References: <mailman.246.1163675475.32031.python-list@python.org>
	<455C64AA.60705@kevin-walzer.com>
Message-ID: <1163689992.519508.36810@i42g2000cwa.googlegroups.com>


Kevin Walzer schrieb:

> Thomas Ploch wrote:
> > Hello folks,
> >
> > Since this is my first post on the list, a brief introduction of myself.
> >
> > My name is Thomas, I am 26 years old, I am a student of Computational
> > Linguistics and I am a python user. :-)
> >
> > Now my problem:
> >
> > I have Tcl/Tk 8.4.4 installed:
> >
> > iPimpG4:~ profipimp$ tclsh
> > % info patchlevel
> > 8.4.4
> > %
> >
> > But when I try to import Tkinter
> >
> >>>> import Tkinter
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File
> > "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",
> > line 38, in <module>
> >     import _tkinter # If this fails your Python may not be configured
> > for Tk
> > ImportError: dlcompat: dyld:
> > /Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
> > can't open library: /Library/Frameworks/Tk.framework/Versions/8.4/Tk
> > (No such file or directory, errno = 2)
> >
> >>>>
> >
> > ...this happens.
> >
> > Why?
> >
> > Tkinter worked perfectly with 2.3 and 2.4...
> >
> > Cheers,
> > Thomas
>
> Where is your installation of Tcl/Tk? It sounds like Python can't find it.
>
> Were you using the standard MacPython builds previously, or Unix-based
> builds from Fink or DarwinPorts?

I built python from source using gcc 4.0.1, but I have solved it by
installing a version of Tcl/TkAqua, now everything runs fine.

Still I dont know why that has happened. The fink directories are in
searchpath...

Thanks for your help,
Thomas



From jonas.esp at googlemail.com  Wed Nov 22 07:22:27 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 22 Nov 2006 04:22:27 -0800
Subject: Data not flushed at the moment
Message-ID: <1164198147.070141.115060@e3g2000cwe.googlegroups.com>

I've to modifying a file, then I use a method imported that access to
that file and has to read the new data, but they are not read ( as if
the data were not flushed at the moment even using .close()
explicitly).

---------------------------------------
    ...
    ...
    # If it is not installed, it looking for the line and insert it.
    if not is_application:
        print "Activating I18n application ..."
        writefile_line = 0
        a = fileinput.input(settings, inplace=1)
#        for line in fileinput.input(settings, inplace=1):
        for line in a:
            writefile_line += 1
            if writefile_line == readfile_line:
                print "    '%s'," % application_name
                print line[:-1]
            else:
                print line[:-1]
        a.close()

        update()

def update():
    # Update the data base.
    try:
        from django.core.management import syncdb
    except ImportError, err:
        print "Can't import from Django: %s" % err
        sys.exit(1)

    syncdb()
---------------------------------------

Note that it only fails if the update() method is run inner of 'if not
is_application', and I don't understand because it is happening so. But
the problem is that I need run it when that condition is performed. Any
idea?



From sbassi at clubdelarazon.org  Tue Nov 28 16:48:14 2006
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Tue, 28 Nov 2006 18:48:14 -0300
Subject: How to refer to Python?
Message-ID: <9e2f512b0611281348q566dd475xd2f18cf7999180a4@mail.gmail.com>

I am writing a paper where I refer to Python. Is there a paper that I
can refer the reader to? Or just use the Python web page as a
reference?


From g.brandl-nospam at gmx.net  Mon Nov  6 05:26:11 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 06 Nov 2006 11:26:11 +0100
Subject: Python Distilled
In-Reply-To: <pan.2006.11.06.10.11.35.335058@gmx.net>
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
	<pan.2006.11.06.10.11.35.335058@gmx.net>
Message-ID: <ein2k4$f44$1@news.albasani.net>

Marc 'BlackJack' Rintsch wrote:
> In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
> wrote:
> 
>> I'd also like to remove any deprecated or stuff which is left in for
>> backwards functionality (eg Classic classes).
> 
> Classic classes are still needed for exceptions:
> 
>>>> class E(object):
> ...    pass
> ...
>>>> raise E
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: exceptions must be classes, instances, or strings (deprecated),
> not type

The error is a bit misleading, since in Python 2.5 all exceptions are new-style,
but new exception classes must be derived from an existing one.
Classic classes, their instances and strings are only allowed for backwards 
compatibility.

Georg


From martin at v.loewis.de  Mon Nov 27 03:53:05 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 27 Nov 2006 09:53:05 +0100
Subject: --enable-shared, how do i set the rpath?
In-Reply-To: <VRwah.14825$6t.1704@newssvr11.news.prodigy.com>
References: <VRwah.14825$6t.1704@newssvr11.news.prodigy.com>
Message-ID: <456AA771.7090804@v.loewis.de>

Mark Harrison schrieb:
> I've built a python with --enable-shared in order to support mod_python,

Why do you think you have to build with --enable-shared to support
mod_python? I'd try to avoid --enable-shared if possible. It
has undesirable consequences...

> but now I have to set LD_LIBRARY_PATH to $prefix/lib. 

... this being one of them. Actually, if you can pass -Wl,-rpath
correctly to the linkage of mod_python, you don't need
LD_LIBRARY_PATH, unless you move libpython2.5.so around.

> Worse, it seems mod_python will die on some import statements,
> I'm suspecting ones that need to pull in .so's.

You should inspect sys.path to find out whether it ought to find
those modules.

Regards,
Martin


From fredrik at pythonware.com  Fri Nov 17 07:05:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 13:05:30 +0100
Subject: Understanding Python Source Code - where to start?
In-Reply-To: <20061117120220.162900@gmx.net>
References: <20061117120220.162900@gmx.net>
Message-ID: <ejk8i9$i90$1@sea.gmane.org>

Thomas Ploch wrote:

> I am thinking about reading and understanding the Source Code
 > of Python, but where would it be best to start? Possibly
 > someone can give me a little hint. I am getting into
 > socketmodule.c a little bit at the moment, but thats not
 > what I want.

http://effbot.org/pyfaq/where-do-i-start-if-i-want-to-learn-about-the-cpython-implementation.htm

</F>



From andymac at bullseye.apana.org.au  Fri Nov 10 19:42:28 2006
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Sat, 11 Nov 2006 10:42:28 +1000
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <45545332.7090208@chamonix.reportlab.co.uk>
References: <eiddl5$qpn$1@news.albasani.net>	<mailman.1858.1162935489.11739.python-list@python.org>	<eit29m$rmk$1@news.albasani.net>	<1163072637.924217.90610@h54g2000cwb.googlegroups.com>	<45533D9F.5020002@chamonix.reportlab.co.uk>	<mailman.2001.1163109689.11739.python-list@python.org>	<4553AEA9.5040902@jessikat.plus.net>
	<45545332.7090208@chamonix.reportlab.co.uk>
Message-ID: <45551C74.4040107@bullseye.andymac.org>

Robin Becker wrote:
> Robin Becker wrote:
>> Andrew MacIntyre wrote:
>>> Robin Becker wrote:
>>>
>>>> I think it uses sysv semaphores and although freeBSD 6 has them 
>>>> perhaps there's something I need to do to allow them to work.
>>> IIRC, you need to explicitly configure loading the kernel module, or
>>> compile the kernel with the necessary option in the config file.
>>>
>> I tried loading the module, but it seems already to be in the kernel. 
>> Probably some sysctl stuff to do.
>>
> In fact the semaphore modules are built in now. I did some debugging and the 
> error happens in the code at SemSet.c line 25
> 
> 
>    for (i = 0; i < sets; i++) {
>      int id = semget(IPC_PRIVATE, MAX_SYSV_SET_SIZE, IPC_CREAT
>              | S_IREAD | S_IWRITE); //SEM_R | SEM_A);
>      if (id == -1) {
> 
> the first semget(i=0) succeeds and the second fails with an errno ENOSPC which 
> from the man page implies a resource issue of some kind.
> 
>      [ENOSPC]           Insufficiently many semaphores are available.
>      [ENOSPC]           The kernel could not allocate a struct semid_ds.
> 
> 
> I guess the freebsd limits  must be different to the original development 
> environment.

The number of semaphores is certainly tunable - the SYSV IPC KERNEL 
PARAMETERS section in the file /usr/src/sys/conf/NOTES lists the SYSV
semaphore parameters that can be set in the kernel config.

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


From celiadoug at mchsi.com  Fri Nov  3 13:32:32 2006
From: celiadoug at mchsi.com (Doug Stell)
Date: Fri, 03 Nov 2006 18:32:32 GMT
Subject: py2exe questions
Message-ID: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>

I have 2 questions about py2exe or any similar utility.

1. Is it possible to create a single Windows executable that does not
blow out to a folder full of files and can be called from scripts
using command line arguments?

2. If the above can be done, it is possible to hide parts of the
Python source code from users? These users are software developers,
but we don't want them to see how the code does what it does.

thanks, doug


From Laundro at gmail.com  Tue Nov 14 06:22:54 2006
From: Laundro at gmail.com (LaundroMat)
Date: 14 Nov 2006 03:22:54 -0800
Subject: VLC-python bindings
Message-ID: <1163503374.834583.177780@e3g2000cwe.googlegroups.com>

Hi,

Has anyone succeeded in compiling the vlc-python bindings on Windows?
(as discussed in the vlc development wiki).

I have found several compiled bindings, but none were updated for
Python 2.4 (or 2.5 for that matter). As I am a complete layman for
everything that is C compilation on any platform, could anyone point me
to vlc-python bindings that work out of the box?

Many thanks in advance,

Mathieu



From __peter__ at web.de  Wed Nov 22 02:54:10 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Nov 2006 08:54:10 +0100
Subject: Is there a list comprehension for this?
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
Message-ID: <ek0vm0$ps5$02$1@news.t-online.com>

liam_herron wrote:

> 
> Given:
> dw = [ 1, -1.1, +1.2 ]
> 
> Suppose I want to create a list 'w' that is defined as
> 
> w[0] = dw[0],
> w[1] = w[0] + dw[1],
> w[2] = w[1] + dw[2]
> 
> Is there a list comprehension or map expression to do it in one or 2
> lines.

>>> from itertools import *
>>> data = [1, -1.1, 1.2]
>>> N = 2
>>> [sum(item) for item in izip(*[chain(repeat(0, i), di) for i, di in
enumerate(tee(data, N))])]
[1, -0.10000000000000009, 0.099999999999999867]

Should work for other values of N, too. No, I'm not serious about it...

Peter


From bootiack at yahoo.com  Tue Nov 28 20:03:52 2006
From: bootiack at yahoo.com (gavino)
Date: 28 Nov 2006 17:03:52 -0800
Subject: why would anyone use python when java is there?
Message-ID: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>

wtf



From Jeff.Demel at JavelinDirect.com  Thu Nov 16 12:56:51 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Thu, 16 Nov 2006 11:56:51 -0600
Subject: Python v PHP: fair comparison?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFDC@DMSP-MSG-EVS01.mail.pvt>

Walterbyrd wrote:
>Okay, where can I get Python and Apache 2.X for $10 a year?

Webfaction.com
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From dhhoa1 at student.monash.edu  Wed Nov  8 22:06:13 2006
From: dhhoa1 at student.monash.edu (Hieu Hoang)
Date: Thu, 09 Nov 2006 14:06:13 +1100
Subject: Python to tell what is the IP of my PC
Message-ID: <f894dee471d6.71d6f894dee4@monash.edu.au>

Hi list,
I think a script to extract the IP from some websites like 
whatismyip.com could do the job. I don't know how to write it though, 
sure someone can give 
direction on that.

Cheers,
Rooy


From paul at boddie.org.uk  Thu Nov  9 07:14:16 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Nov 2006 04:14:16 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
	<mailman.1924.1163014946.11739.python-list@python.org>
Message-ID: <1163074456.469115.45230@i42g2000cwa.googlegroups.com>

Cliff Wells wrote:
>
> But of course "not everyone" is a double-edged sword that can just as
> easily be turned against either party.  If we limit ourselves to saying
> what is going to be the most palatable for the widest audience we will
> most likely find ourselves confined to discussing the weather.

I recall at this point the advice once given to writers submitting
articles to Linux Journal:

"Be careful with humor. Sarcasm and irony are misread easily and can be
offensive. Many readers have English as a second language and may not
be familiar with your culture's running jokes and topical matters."

http://www.linuxjournal.com/xstatic/author/authguide

> And of course, people who worry too much about impressing others rarely
> do.  Just ask DHH of Ruby on Rails fame:
>
> http://static.flickr.com/47/127984254_ddd4363d6a_m.jpg

Yes, but not everyone is happy about that:

"DHH has just got to stop saying [word elided] at conferences."

https://www.lostlake.org/blog/index.php?/archives/11-The-Impending-Ruby-Fracture.html#c36

There's a clear difference between using profanity for dramatic effect
(acceptable in various contexts) and going round like a twelve year
old, mouthing off in an attempt to impress or shock people.

[...]

> I'll apply an old software maxim (from sendmail?) to the topic of public
> interaction: "Be liberal in what you accept, conservative in what you
> send."  Applying this would suggest that both parties were equally at
> fault in this situation, so perhaps we can just leave it at that.

I think this is reasonable advice.

Paul



From sjmachin at lexicon.net  Thu Nov 23 06:25:38 2006
From: sjmachin at lexicon.net (John Machin)
Date: 23 Nov 2006 03:25:38 -0800
Subject: "10, 20, 30" to [10, 20, 30]
In-Reply-To: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
Message-ID: <1164281138.479940.21020@j44g2000cwa.googlegroups.com>


Daniel Austria wrote:
> Sorry,
>
> how can i convert a string like "10, 20, 30" to a list [10, 20, 30]
>
> what i can do is:
>
> s = "10, 20, 30"
> tmp = '[' + s + ']'
> l = eval(tmp)
>
> but in my opinion this is not a nice solution

Most people share your opinion. Try this:

| >>> strg = "10, 20, 30"
| >>> [int(x) for x in strg.split(',')]
| [10, 20, 30]

Cheers,
John



From crankycoder at gmail.com  Thu Nov 23 10:54:20 2006
From: crankycoder at gmail.com (Victor Ng)
Date: Thu, 23 Nov 2006 10:54:20 -0500
Subject: Does only emacs and idle support symbolic debugging?
Message-ID: <a8bfd74c0611230754m497fdb13w8d7ae3fafe9beb04@mail.gmail.com>

Subject line pretty much says it all - are those the only two editors
that support running the symbolic debugger from inside the editor?

vic

-- 
"Never attribute to malice that which can be adequately explained by
stupidity."  - Hanlon's Razor


From john106henry at hotmail.com  Thu Nov 30 14:49:08 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 11:49:08 -0800
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
	<qqGbh.10436$Gk5.6159@tornado.texas.rr.com>
Message-ID: <1164916148.930057.280350@f1g2000cwa.googlegroups.com>

Paul McGuire wrote:
> "Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message
> news:MmGbh.10434$Gk5.6762 at tornado.texas.rr.com...
> > "John Henry" <john106henry at hotmail.com> wrote in message
> > news:1164913125.509492.54060 at 79g2000cws.googlegroups.com...
> snip
>
> Grrrr... that's what I get for not keeping editor and interpreter windows in
> sync.  My post was referencing vars I had defined in the interpreter, but
> which the function had no clue of. !!!  Here's a working version.
>
> -- Paul
>
>
> def splitUp(src,lens):
>     ret = []
>     cur = 0
>     for length in lens:
>         if length is not None:
>             ret.append( src[cur:cur+length] )
>             cur += length
>         else:
>             ret.append( src[cur:] )
>     return ret
>
> origlist = list("ABCDEFGHIJ")
> alist, blist, clist, dlist = splitUp( origlist, (1,1,3,None) )
> print alist, blist, clist, dlist


Nice.

While we are at it, why not:

class splitUp(object):
   def __init__(self,src):
       self._src=list(src)
   def slice(self, lens):
     ret = []
     cur = 0
     for length in lens:
         if length is not None:
             ret.append( self._src[cur:cur+length] )
             cur += length
         else:
             ret.append( self._src[cur:] )
     return ret

alist, blist, clist, dlist = splitUp("ABCDEFGHIJ").slice((1,1,3,None))
print alist, blist, clist, dlist

Now, that's readable!



From bytter at gmail.com  Wed Nov 29 12:58:28 2006
From: bytter at gmail.com (Bytter)
Date: 29 Nov 2006 09:58:28 -0800
Subject: Detecting recursion loops
In-Reply-To: <ekk6qu$po0$1@news.albasani.net>
References: <ekk6qu$po0$1@news.albasani.net>
Message-ID: <1164823108.300538.228730@16g2000cwy.googlegroups.com>

Hi!

I hope you are not trying to find infinite loops and I simply
misunderstood your question. Because if you are, then forget it (Turing
anyone?)... Infinite loops are impossible to find (minus some few, very
specific situations).

Cf. http://en.wikipedia.org/wiki/Halting_problem

Cheers,

Hugo Ferreira

P.S. Hmmm... It seems I really read it wrong since you define that you
want to stop "(after N passes or some complex criteria)". Anyway I
leave the warning for future generations :)

> My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
> What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?
> 
> Robert



From metaperl at gmail.com  Mon Nov 20 09:19:04 2006
From: metaperl at gmail.com (metaperl)
Date: 20 Nov 2006 06:19:04 -0800
Subject: What do I look for in a shared Python host?
In-Reply-To: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
Message-ID: <1164032344.367808.130890@b28g2000cwb.googlegroups.com>

Try our hosting cooperative. We are a not-for-profit hosting service:

http://www.HCOOP.net

walterbyrd wrote:
> For example:
>
> - If I want to use Django, I need either FastCGI or Apache
> 2.X/mod_python 3.x
>
> - if I want to use TurboGears, I need Python 2.4: not 2.3 and not 2.5
>
> - I have just learned that some hosters have T&Cs that forbid long
> running processes. I am not sure exactly what that means. Except I
> understand it can be a problem if using Cherrypy/TurboGears
>
> - I have read that mod_python before 3.x can be difficult
> 
> What other "gotchas" would I look for?



From ccillonh at gmail.com  Wed Nov  1 09:37:59 2006
From: ccillonh at gmail.com (ccillonh at gmail.com)
Date: 1 Nov 2006 06:37:59 -0800
Subject: FREE WEB SPACE FOR EVERYONE
Message-ID: <1162391879.816789.158780@f16g2000cwb.googlegroups.com>

Hey I just got my web server up and running yesterday morning. I have
decided to give away free online storage space to everyone. Hell have
as many accounts as you want. I limit 5 GB per account. Im testing the
load on my server and ask that everyone help me out and upload anything
you want. When this becomes a paid service I will give unlimited space
to all you that help me out with the test.

 there are no downloads needed due to it is all web based


 Currently I have 1,384 accounts within the last 24 hours. Over 1,860
GBs have been transfered both ways. the upload and download speed are 5
MB up and 5 MB down due to a really fast fiber optic system. I have
500,000 GB's to give out so hurry up and get yours!!!

  ---> To get your free account to directly to the server address -->
Http://71.168.66.235

 and click on "I want to register" You will get an instant FREE
account. Ignore the 50 MB quota message. It has been disabled.

 for more information on the company in the making go to
www.cillostorage.com



From Thomas.Ploch at gmx.net  Thu Nov 16 06:10:50 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 16 Nov 2006 12:10:50 +0100
Subject: Tkinter & Python 2.5 Problems on MAC OS 10.3.9
Message-ID: <op.ti3vyrp4g7c6tx@ipimpg4.local>

Hello folks,

Since this is my first post on the list, a brief introduction of myself.

My name is Thomas, I am 26 years old, I am a student of Computational  
Linguistics and I am a python user. :-)

Now my problem:

I have Tcl/Tk 8.4.4 installed:

iPimpG4:~ profipimp$ tclsh
% info patchlevel
8.4.4
%

But when I try to import Tkinter

>>> import Tkinter
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File  
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",  
line 38, in <module>
     import _tkinter # If this fails your Python may not be configured for  
Tk
ImportError: dlcompat: dyld:  
/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python  
can't open library: /Library/Frameworks/Tk.framework/Versions/8.4/Tk  (No  
such file or directory, errno = 2)

>>>

...this happens.

Why?

Tkinter worked perfectly with 2.3 and 2.4...

Cheers,
Thomas


From metaperl at gmail.com  Tue Nov 21 11:12:15 2006
From: metaperl at gmail.com (metaperl)
Date: 21 Nov 2006 08:12:15 -0800
Subject: OODB vs RDBMS
In-Reply-To: <1164065670.573361.60390@m73g2000cwd.googlegroups.com>
References: <4se3omFv6reaU1@mid.individual.net>
	<45621a57$0$10443$426a74cc@news.free.fr>
	<mailman.519.1164064611.32031.python-list@python.org>
	<1164065670.573361.60390@m73g2000cwd.googlegroups.com>
Message-ID: <1164125535.777815.116260@h48g2000cwc.googlegroups.com>



On Nov 20, 6:34 pm, "Dan Lenski" <dlen... at gmail.com> wrote:
> I'll second the recommendation of sqlalchemy... I've heard it's very
> good.  Personally I prefer SQLObject, which is a similar library but in
> my opinion a bit simpler and more "pythonic".

TurboEntity was the first "SQLObject Layer for SQLAlchemy"... it will
soon be improved upon, but it was quite slick.



From powernews at libero.it  Mon Nov 27 13:01:20 2006
From: powernews at libero.it (halex2000)
Date: Mon, 27 Nov 2006 18:01:20 GMT
Subject: working with files and directories
References: <7IAah.58105$uv5.416763@twister1.libero.it>
	<mailman.766.1164631069.32031.python-list@python.org>
	<jkBah.58160$uv5.417213@twister1.libero.it>
	<Xns98888B8FD9B32duncanbooth@127.0.0.1>
Message-ID: <QJFah.58551$uv5.421722@twister1.libero.it>


"Duncan Booth" <duncan.booth at invalid.invalid> ha scritto nel messaggio 
news:Xns98888B8FD9B32duncanbooth at 127.0.0.1...
> "halex2000" <powernews at libero.it> wrote:
>> "Thomas Ploch" <Thomas.Ploch at gmx.net> ha scritto nel messaggio
>> news:mailman.766.1164631069.32031.python-list at python.org...
>>> Have you actually even tried to find some "documentation"?
>>> Have you placed a google search "python directories rename files"?
>>> Thomas
>>
>> Actually I did it on the documentation file provided with the windows
>> distribution. I took a look at 11 ("File and Directory Access") but
>> the listed functions doesn't appear to be what I need. 14.1.4 should
>> do the job, but was not as intuitive to find as the previous one.
>>
> Do you know about the search tab in windows help? Searching for "rename
> files", or indeed a search identical to the one suggested for Google will
> both find 14.1.4 as the top hit.

I'm aware of it, thank you. I usually don't use to ask for infos that I 
could easily find myself in a few seconds, but I had not the time at the 
moment to even start a search (of course, If I knew it would have been so 
quick, I would have done it myself). I was just under the impression that I 
was looking in the wrong place. 




From arkanes at gmail.com  Wed Nov 29 16:27:01 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 29 Nov 2006 15:27:01 -0600
Subject: type(foo) == function ?
In-Reply-To: <l1trm21pku7nc60nu1mh7cbopddp6osoet@4ax.com>
References: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>
	<V5qdnXzkk976cPDYnZ2dnUVZ_uadnZ2d@speakeasy.net>
	<l1trm21pku7nc60nu1mh7cbopddp6osoet@4ax.com>
Message-ID: <4866bea60611291327o360e5f10qe15f4a0e046d0772@mail.gmail.com>

On 11/29/06, Tom Plunket <tomas at fancy.org> wrote:
> Erik Max Francis wrote:
>
> > In dynamically-typed languages in general, explicit typechecks are not
> > a good idea, since they often preclude user-defined objects from being
> > used.  Instead, try performing the call and catch the resulting
> > TypeError:
>
> Good point, although I need to figure out if the thing can be called
> without calling it, so I can build an appropriate UI.  Basically I
> expect three types of things in the 'value' field of the top-level
> dictionary.  The three sorts of things that I will deal with in the UI
> are callable things (e.g. functions, for which Chris Mellon reminds me
> about callable()), mappings (e.g. dictionaries, used similarly to the
> top-level one), and sequences of strings.
>
> So I think callable() works for me in the general case, but now
> trawling the documentation in that area I'm not sure how I can tell if
> something is a mapping or if it's a sequence.
>
> The gist of the UI generation may be envisioned as:
>
> key is the name that gets assigned to the control.
> value indicates that the UI element is a:
>    "group box" if the value is a mapping
>    series of "radio buttons" if the value is a sequence of strings
>    "check box" if the value is a function
>
> ...I've still gotta figure out the exact API, this is for a plugin
> sort of system that'll be used by the manually-driven version of the
> build process and this data is explicitly to build the UI for the
> various tools that are available.
>

Since a sequence can be viewed as a special case of a mapping (a dict
with integer keys) I don't think there's a good general case way to
tell.

You could try indexing it with a string, a sequence will throw a
TypeError, while a mapping will give you a result or a KeyError.

You could also just rely on isinstance() checks.

> thanks,
> -tom!
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From larry.bates at websafe.com  Wed Nov  8 18:09:41 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 08 Nov 2006 17:09:41 -0600
Subject: help using smtplib to work ..
In-Reply-To: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
Message-ID: <455263B5.9080704@websafe.com>

NicolasG wrote:
> I'm using the following code to send e-mail through python:
> 
> import smtplib
> 
> fromaddr = 'myMail at gmail.com'
> toaddrs  = 'myOtherMail at gmail.com'
> subject = 'someting for subject !'
> 
> msg = 'This is body of the mail.'
> 
> msg = 'From: ' + fromaddr + '\nTo: ' + toaddrs + '\nSubject:' + subject
> + '\n\n' + msg
> print "Message length is " + repr(len(msg))
> 
> server = smtplib.SMTP('smtp.gmail.com')
> server.set_debuglevel(1)
> server.sendmail(fromaddr, toaddrs, msg)
> server.quit()
> 
> I have replaced the sender and receiver's mail address with the
> original ones but executing this code I get the error (ip is hided for
> obvious reason):
> 
> send: 'ehlo computer.domain_not_set.invalid\r\n'
> reply: '250-mx.google.com at your service, [xxx.xx.xxx.xxx]\r\n'
> reply: '250-SIZE 20971520\r\n'
> reply: '250-8BITMIME\r\n'
> reply: '250-STARTTLS\r\n'
> reply: '250 ENHANCEDSTATUSCODES\r\n'
> reply: retcode (250); Msg: mx.google.com at your service,
> [xxx.xx.xxx.xxx]
> SIZE 20971520
> 8BITMIME
> STARTTLS
> ENHANCEDSTATUSCODES
> send: 'mail FROM:<myMail at gmail.com> size=106\r\n'
> reply: '530 5.7.0 Must issue a STARTTLS command first
> s1sm7666914uge\r\n'
> reply: retcode (530); Msg: 5.7.0 Must issue a STARTTLS command first
> s1sm7666914uge
> send: 'rset\r\n'
> reply: '250 2.1.0 Flushed s1sm7666914uge\r\n'
> reply: retcode (250); Msg: 2.1.0 Flushed s1sm7666914uge
> Traceback (most recent call last):
>   File "C:\Documents and Settings\NicolasG\Desktop\smtpexample.py",
> line 17, in <module>
>     server.sendmail(fromaddr, toaddrs, msg)
>   File "C:\Python25\lib\smtplib.py", line 684, in sendmail
>     raise SMTPSenderRefused(code, resp, from_addr)
> SMTPSenderRefused: (530, '5.7.0 Must issue a STARTTLS command first
> s1sm7666914uge', 'myMail at gmail.com')
> 
> What am I doing wrong ?
> 

<snip from Gmail SMTP setup instructions>

Under outgoing mail smtp server, use smtp.gmail.com. Since it requires SMTP
authorization, use your Gmail account as username (e.g. yourname at gmail.com) and
your Gmail password as password. You can turn TSL on or off.

<end snip>

The email server requires authentication before it can send.
Normally this can be accomplished either by calling

server.login(userid, password)

The only alternative is to use an open relay email server that allows
you to send without authenticating.  Hope info at least points you in
the right direction.

-Larry


From fredrik at pythonware.com  Thu Nov 23 05:57:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 11:57:13 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <Xns9884782092A96toreriknpolarno@129.242.5.222>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <ek3uqa$8lm$1@sea.gmane.org>

Tor Erik Soenvisen wrote:

> (len(['']) is 1) == (len(['']) == 1) => True
> 
> Is this the case for all numbers?

I'm not sure what you're asking here, but if you digest the following 
facts, maybe you can answer it yourself:

1) all objects that exist at the same time have distinct identifies, and 
2) a Python implementation may or may not hand reuse existing immutable 
objects that have the same value when asked to create a new object,
3) identities are recycled when objects are deleted, and
4) [] and {} always create a new object every time they're evaluated.

</F>



From defenestrationism at gmail.com  Thu Nov 30 20:42:53 2006
From: defenestrationism at gmail.com (defenestrationism at gmail.com)
Date: 30 Nov 2006 17:42:53 -0800
Subject: Python/Flash integration
Message-ID: <1164937373.716450.215710@f1g2000cwa.googlegroups.com>

Hello,

I've been able to use makepy to create a wrapper around flash8.ocx and
I have a wx app that serves as a container.  I can get this simple case
to run a flash swf, and I can also receive fscommands from the flash
movie to the container.  However, I've seen commercial flash containers
that provide new Actionscript functions (not fscommands) that can be
called from the flash movie to do something at the os level.  How can I
do this?  Any insights would be appreciated!

Thanks.



From pyscripter at gmail.com  Mon Nov 20 08:52:17 2006
From: pyscripter at gmail.com (Kiriakos Vlahos)
Date: Mon, 20 Nov 2006 15:52:17 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061119151123.GA15575@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<mailman.429.1163876907.32031.python-list@python.org>
	<NvqdnTFpgPPgwMLYnZ2dnUVZ_sednZ2d@comcast.com>
	<mailman.436.1163881833.32031.python-list@python.org>
	<1163902308.672892.268320@k70g2000cwa.googlegroups.com>
	<20061119151123.GA15575@58sirius016.dc.ukrtel.net>
Message-ID: <4e0e7c720611200552q2e521b9hbb7b2b0389c72919@mail.gmail.com>

See my response in the newsgroup.

Regards

Kiriakos

On 19/11/06, Kirill Simonov <xi at gamma.dn.ua> wrote:
>
> On Sat, Nov 18, 2006 at 06:11:48PM -0800, PyScripter wrote:
> > Kirill Simonov wrote:
> > > PyScripter does, indeed, look nice, but unfortunately it appeared to
> > > have similar issues with cyrillic support. Thank you anyway for the
> > > suggestion.
> >
> >
> > What are the issues?  PyScripter offers full support for utf-8 encoded
> > files and PEP-263.  The editor internally is unicode based.    Please
> > read the PyScripter help topic "Encoded Python Source Files", paying
> > special attention to the last paragraph, and if you follow the
> > guidelines you should have no problem with cyrillic or other encodings.
> >  If you have problems email pyscripter at gmail.com for support.
>
> The issues are related to the emulation of sys.stdin and sys.stdout in
> the interactive console (which is called Python Interpreter in
> PyScripter).
>
> In PyScripter,
>     >>> print "...some cyrillic characters..."
> produces output as if an UTF-8 string is displayed in latin1.
> On the other hand,
>     >>> print u"...some cyrillic characters..."
> works correctly in PyScripter.  Both above examples works correctly in a
> real console when sys.stdout.encoding is set to 'utf-8'.
>
> raw_input() doesn't work at all with non-ASCII characters in PyScripter.
>     >>> raw_input("...some cyrillic characters...")
> displays the label in latin1 while
>     >>> raw_input(u"...some cyrillic characters...")
> produces UnicodeDecodeError.
>
> Moreover, if I enter some cyrillic characters to the input box of
> raw_input(), it returns a line of '?'. This might be related to the fact
> that I use WinXP ENG (not RUS), but still I believe it's possible to
> make it work even in this environment.
>
> I'd like the emulated sys.stdin and sys.stdout to behave like the real
> sys.stdin and sys.stdout do under a UTF-8 terminal when
> sys.stdout.encoding is set to 'utf-8'.
>
> Python 2.5, PyScripter 1.7.2.0.
>
>
> Thanks,
> Kirill
>
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From nick at craig-wood.com  Mon Nov 13 07:30:03 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 13 Nov 2006 06:30:03 -0600
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
Message-ID: <slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>

Adrian Casey <adrian.casey at internode.on.net> wrote:
>  I have a multi-threaded python application which uses pexpect to connect to
>  multiple systems concurrently.  Each thread within my application is a
>  connection to a remote system.  The problem is when one of the child
>  threads runs a command which generates an unlimited amount of output.  The
>  classic example of this is the "yes" command.  If you
>  execute "pexpect.run('yes')", your cpu will sit at 100% forever.
> 
>  Here is a simple multi-threaded program using pexpect which demonstrates the
>  problem.  The command 'yes' is run in a thread.  The parent says that when
>  the alarm goes off, run the handler function.  The thread sets the alarm to
>  trigger after 5 seconds.

1) Don't ever mix threads and signals - you are heading for trouble!

2) pexpect has a timeout parameter exactly for this case

import os, pexpect, threading

def runyes():
        print "Running yes command..."
        pexpect.run('yes', timeout=5)

t = threading.Thread(target=runyes)
t.start()
t.join()

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


From podi.ex at gmail.com  Mon Nov 27 17:39:11 2006
From: podi.ex at gmail.com (Podi)
Date: 27 Nov 2006 14:39:11 -0800
Subject: windows background process
In-Reply-To: <mailman.696.1164420461.32031.python-list@python.org>
References: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
	<mailman.696.1164420461.32031.python-list@python.org>
Message-ID: <1164667151.452463.105310@45g2000cws.googlegroups.com>


Gabriel Genellina wrote:
> os.spawnl(os.P_NOWAIT, 'mycmd.exe', 'mycmd.exe', 'first_arg', 'second_arg')
> That is, you must provide explicitely the value for argv[0] (executable)
> Remember to quote appropiately any parameter with embedded spaces
> (including the executable). On Python 2.5 you could use subprocess.list2cmdline
>
Right, this works. Before, I didn't realize that the full path goes to
the 2nd and 3rd argument of spawnl.

Thanks for the help.
P



From antroy at gmail.com  Thu Nov  9 07:59:01 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 04:59:01 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
Message-ID: <1163077141.110334.136080@i42g2000cwa.googlegroups.com>



On Nov 9, 6:52 am, "BillJosephson" <billjoseph... at hotmail.com> wrote:
...
> If anyone knows why i can't connect, in info about it would be
> a big help.

Sounds like the default mirror is down. Go to Utilities -> Global
Options -> Plugin Manager and click on "Update mirror list". Choose a
new mirror and try again. If that still fails, it may be that you need
to set up your proxy server properly.



From steve at holdenweb.com  Mon Nov 13 04:38:31 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:38:31 -0600
Subject: reduce to be removed?
In-Reply-To: <1163347835.815187.216180@e3g2000cwe.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>	<mailman.2122.1163291415.11739.python-list@python.org>	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>	<mailman.2127.1163297289.11739.python-list@python.org>	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>	<mailman.0.1163325764.32031.python-list@python.org>
	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>
Message-ID: <ej9ece$8f2$4@sea.gmane.org>

Dustan wrote:
> Alright, I can see I'm a bit outvoted here. I tried your suggestions
> and it worked fine.
> 
> I'll also try to consider in the future that part of the problem might
> be lack of information conveyed on my part.
> 
Well, since such honest and public self-examination is so rarely seen 
(especially in the face of the effbot's occasional vehement bluntness) 
allow me to congratulate you on your open-mindedness.

Sometimes it seems like "egoless programming" went out with the 1980's. 
I'm sure I'll enjoy reading your future posts.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From adrian.casey at internode.on.net  Mon Nov 13 06:03:11 2006
From: adrian.casey at internode.on.net (Adrian Casey)
Date: Mon, 13 Nov 2006 20:33:11 +0930
Subject: Using signal.alarm to terminate a thread
Message-ID: <12lgk7h55lu0vb4@corp.supernews.com>

I have a multi-threaded python application which uses pexpect to connect to
multiple systems concurrently.  Each thread within my application is a
connection to a remote system.  The problem is when one of the child
threads runs a command which generates an unlimited amount of output.  The
classic example of this is the "yes" command.  If you
execute "pexpect.run('yes')", your cpu will sit at 100% forever.

Here is a simple multi-threaded program using pexpect which demonstrates the
problem.  The command 'yes' is run in a thread.  The parent says that when
the alarm goes off, run the handler function.  The thread sets the alarm to
trigger after 5 seconds.

#!/usr/bin/env python
import signal, os, pexpect, threading

def handler(signum, frame):
# This should get called after 5 seconds when the alarm fires.
        os.system('killall yes')
        print "The yes command has been killed!"

def runyes():
# Run the 'yes' command in a thread.  Set an alarm
# to fire in 5 seconds.
        signal.alarm(5)
        print "Running yes command..."
# If you run 'sleep 10' instead, this works.
        pexpect.run('yes')
# Re-set the alarm.  (This is never reached.  The 'yes'
# command runs forever and is not interrupted by the alarm)
        signal.alarm(0)

signal.signal(signal.SIGALRM, handler)
t = threading.Thread(target=runyes)
t.start()
t.join()
# END of code

Note that if the 'yes' command is substituted for 'sleep 10', the code works
perfectly.

Why can't the 'yes' command be interrupted using the SIGALRM method when the
sleep command can?  I realize that noone would really run 'yes' but what if
a user account has a buggy .bashrc and loops forever?  Just one thread
locking up like this holds up all the others.

Any ideas or suggestions on how to handle such situations in a
multi-threaded way would be appreciated.

Cheers.
Adrian Casey.
Alice Springs Linux User Goup.
http://www.aslug.org.au


From tuomas.vesterinen at pp.inet.fi  Thu Nov  2 15:23:28 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Thu, 02 Nov 2006 20:23:28 GMT
Subject: __div__ not recognized automatically
In-Reply-To: <eicmj4$sak$1@gwdu112.gwdg.de>
References: <eicmj4$sak$1@gwdu112.gwdg.de>
Message-ID: <4ts2h.358$SZ3.115@read3.inet.fi>


Try
a=(b+c)/NumX(2)

TV

Anton81 wrote:
> Hello!
> 
> I wrote a class
> 
> class NumX:
>   ...
>   def __add__(self,other):
>     ...
>   def __div__(self,other):
>     if not isinstance(other,NumX): other=NumX(other)
>     ...
> 
> Somewhere else I use
> 
> a=(b+c)/2
> 
> where all variables are of NumX Type. When I execute the program it
> complains that it can't find an operator "/" for "instance" and "integer".
> However if I use pdb the same command works when started on the prompt. Also
> the manual execution
> 
> a=(b+c).__div__(2)
> 
> works. Any suggestions what goes wrong?
> 
> Anton


From futurebase at gmx.at  Thu Nov 23 06:13:10 2006
From: futurebase at gmx.at (Daniel Austria)
Date: 23 Nov 2006 03:13:10 -0800
Subject: "10, 20, 30" to [10, 20, 30]
Message-ID: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>

Sorry,

how can i convert a string like "10, 20, 30" to a list [10, 20, 30]

what i can do is:

s = "10, 20, 30"
tmp = '[' + s + ']'
l = eval(tmp)

but in my opinion this is not a nice solution


daniel



From horpner at yahoo.com  Wed Nov 29 10:33:52 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 29 Nov 2006 16:33:52 +0100
Subject: trouble writing results to files
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
Message-ID: <slrnemra5e.po.horpner@FIAD06.norwich.edu>

On 2006-11-29, Roberto Bonvallet <Roberto.Bonvallet at cern.ch> wrote:
> BTW, iterating over range(len(a)) is an anti-pattern in Python.

Unless you're modifying elements of a, surely?

-- 
Neil Cerutti
You can't give him that cutback lane. He's so fast, and he sees it so well. He
can also run away from you if he gets a little bit of crack. --Dick Lebeau


From pavlovevidence at gmail.com  Sat Nov 11 06:02:23 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 11 Nov 2006 03:02:23 -0800
Subject: Inheritance Question
In-Reply-To: <ej34k1$6oh$1@skeeter.ucdavis.edu>
References: <ej34k1$6oh$1@skeeter.ucdavis.edu>
Message-ID: <1163242943.761514.57640@k70g2000cwa.googlegroups.com>

Jackson wrote:
> For a more "concrete" example:
>
> Suppose all the animals in the world have only 1 or 2 legs.
>
> class Legs(object)
>   def run(): pass
>   def walk(number_of_legs):
>     # lots of commands
>     # that do not depend on the
>     # number of legs but definitely
>     # have to do with walking
>
>     if number_of_legs == '1':
>        # blah blah
>
>     if number_of_legs == '2':
>        # blah blah
>
>     # more commands
>
> class HasAtLeastOneLeg(Legs):
>   def walk():
>     # Legs.walk(number_of_legs=1)
>
> class HasTwoLegs(HasAtLeastOneLeg,Legs):
>   def walk()
>     # Legs.walk(number_of_legs=2)

Well, I would have done this differently.  If the only difference in
behavior between one- and two-legged creatures is their gait, I
probably wouldn't have bothered breaking Legs into subclasses.  I'd
just pass the number of legs into __init__:

class Legs(object):
    def __init__(self,number_of_legs):
        self.number_of_legs = number_of_legs
    def walk(self):
        # non-legs-dependent stuff
        if self.number_of_legs == 1:
            # one-legged gait
        elif self.number_of_legs == 2:
            # two-legged gait
        else:
            raise ValueError("invalid number of legs")
        # more non-legs-dependent stuff

Then, when defining some sort of monster class, I'd do something like
this:

class Human(object):
    def __init__(self):
        self.legs = Legs(2)
        # etc.

class Dufflepud(object):
    def __init__(self):
        self.legs = Legs(1)
        # etc.

If there's more to it than just gait (say for example, one-legged
creatures attack differently, jump higher, and can't turn invisible
because they don't have enough limbs to cast Level 4 Invisibility),
then I would factor out differences in behavior into subclasses.

class Legs(object):
    def walk(self):
        # non-leg-related stuff
        self.set_gait()
        # more non-leg-related stuff

class OneLeg(Legs):
    def set_gait(self):
        # set the one-legged gait

class TwoLegs(Legs):
    def set_gait(self):
        # set the two-legged gait

class Human(object):
    def __init__(self):
        self.legs = TwoLegs()

class Dufflepud(object):
    def __init__(self):
        self.legs = OneLeg()


ISTM you have been missing out on the true power of inheritance.
Behavior exclusive to creatures with two legs should be implmented in
the TwoLegs class, but in your example you define a HasTwoLegs class
yet still implement this behavior in the base class Legs.  That's just
poor use of inheritance.  My examples implement behavior exclusive to
two-legged creatures inside the TwoLegs class, where it belongs.

In fact, BEHAVIOR is the key to arranging class hierarchies.  (The
classical advice, the inheritance represents the "is a" relationship,
can be very misleading and I don't recommend using it.  The focus
should be on behavior.)  Anyways, in your universe, there are three
kinds of behaviors:

A. behaviors exclusive to one-footed creatures
B. behaviors exclusive to two-footed creatures
C. behaviors common to both

Once you consider behaviors in this way, how to arrange the class
hierarchy becomes obvious.  Each kind of behavior shoud be implemented
in its own class: common behaviors go into base classes, exclusive
behaviors into subclasses.  The hierarchy should look like this:

class Legs -- this should implement all common behavior
class OneLeg(Legs) -- should implment all behavior exclusive to
one-legged creatures
class TwoLegs(Legs) -- should implment all behavior exclusive to
two-legged creatures

Note that there's no need for an AtLeastOneLeg class.  There are only
one- and two-legged creatures in this univserse, so behaviors exclusive
to creatures with at least one leg apply are in fact common to all
creatures.  But suppose we add zero-footed creatures to the universe.
Now we identify five kinds of behaviors:

A. behaviors common to all creatures
B. behaviors exclusive to zero-footed creatures
C. behaviors common to one- and two-footed creatures
D. behaviors exclusive to one-footed creatures
E. behaviors exclusive to two-footed creatures

Now we need an AtLeastOneLeg class in our hierarchy:

class Legs
class ZeroLegs(Legs)
class AtLeastOneLeg(Legs)
class OneLeg(AtLeastOneLeg)
class TwoLegs(AtLeastOneLeg)

But, notice that we still have a OneLeg class, because there's still
behavior exclusive to one-legged creatures.  It belongs in OneLeg, not
in AtLeastOneLeg.

Hope this long-winded advice helps.


Carl Banks



From pavlovevidence at gmail.com  Wed Nov 22 12:57:58 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 22 Nov 2006 09:57:58 -0800
Subject: Note about getattr and '.'
In-Reply-To: <pan.2006.11.22.04.09.40.990455@REMOVEME.cybersource.com.au>
References: <1164144112.686480.60240@j44g2000cwa.googlegroups.com>
	<45637197$0$12642$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.22.04.09.40.990455@REMOVEME.cybersource.com.au>
Message-ID: <1164218278.228073.193830@e3g2000cwe.googlegroups.com>


Steven D'Aprano wrote:
> On Tue, 21 Nov 2006 22:39:09 +0100, Mathias Panzenboeck wrote:
> > Yes, this is known. I think IronPython uses a specialized dictionary for members, which prohibits
> > malformed names. I don't know if there will be such a dictionary in any future CPython version.
> > (Would be good.)
>
> Why would it be good?
>
> How many bugs have you found that were caused by this behaviour?

It's not bugs.  A specialized dictionary could be better optimized if
you know it can only hold Python identifiers.  There's talk of such a
dictionary in Python 3000.


Carl Banks



From shejo284 at gmail.com  Fri Nov 17 06:45:01 2006
From: shejo284 at gmail.com (Sheldon)
Date: 17 Nov 2006 03:45:01 -0800
Subject: C extensions and memory leakage
In-Reply-To: <mailman.327.1163758680.32031.python-list@python.org>
References: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.08.38.17.567889@gmx.net>
	<1163758039.754781.199940@h54g2000cwb.googlegroups.com>
	<mailman.327.1163758680.32031.python-list@python.org>
Message-ID: <1163763900.876259.325360@j44g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Sheldon wrote:
>
> > I am very new at this C extensions in Python so my term wrapper was
> > probably a misnomer. Perhaps glue is better or the interface that
> > allows the exchange of data between Python and C.
> > Yes, I am using python objects in my C extension.
> > Tell me where I can find out more about this reference counters? Or
> > perhaps you can tell something about it.
> 
> http://docs.python.org/ext/refcounts.html
> 
> </F>

Thanks!



From Eric_Dexter at msn.com  Mon Nov 13 04:36:13 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 13 Nov 2006 01:36:13 -0800
Subject: Jython compile errors ...
In-Reply-To: <1163406931.241442.243390@e3g2000cwe.googlegroups.com>
References: <1163406931.241442.243390@e3g2000cwe.googlegroups.com>
Message-ID: <1163410573.124074.127560@k70g2000cwa.googlegroups.com>

If you are looking for an example of jython there is one in embeded in
csound blue.  available from the csounds.com website I believe.  I have
used it under the new java framework.  I am not far enough along to
know if you are missing brackets {} exc and () and one ; but you can
try getting the python part to work under python 2.3


https://sourceforge.net/project/showfiles.php?group_id=156455

donkeyboy wrote:
> All,
>
> I've tried the jythonc compiler to try and create an applet to see how
> it works, but I get a number of Java compile errors that are way above
> my knowledge. Does anyone know what any of the following means? I'm
> using JDK 1.5.0_09, under Win XP SP2.
>
> Runnnig the file " jython FILENAME" works, so I don't know what's
> happening. Any thoughts?
>
> C:\EclipseWorkbench\Jython>jythonc -d --jar leaders.jar jy_leaders.py
> processing jy_leaders
>
> Required packages:
>   javax.swing
>   java.lang
>   java.awt
>   java.applet
>   java.util
>
> Creating adapters:
>   java.awt.event.ActionListener used in jy_leaders
>
> Creating .java files:
>   jy_leaders module
>     MyDrawPanel extends javax.swing.JPanel
>     Main extends java.applet.Applet
>
> Compiling .java to .class...
> Compiling with args: ['c:\\Program
> Files\\Java\\jdk1.5.0_09\\bin\\javac', '-clas
> spath',
> 'C:\\jython\\jython.jar;;.\\jpywork;;C:\\jython\\Tools\\jythonc;C:\\Ecli
> pseWorkbench\\Jython\\.;C:\\jython\\Lib;C:\\jython',
> '.\\jpywork\\jy_leaders.jav
> a']1  .\jpywork\jy_leaders.java:3: <identifier> expected
> public class jy_leaders extends java.lang.Object {
>              ^
> .\jpywork\jy_leaders.java:8: '{' expected
>     public static class _PyInner extends PyFunctionTable implements
> PyRunnable {
>
>                   ^
> .\jpywork\jy_leaders.java:419: ')' expected
>             Py.initProxy(this, "jy_leaders", "MyDrawPanel", args, 2
> jython_leaders_sandbox.jpy$packages, jy_leaders.jpy$proxyProperties
> , "", new String[] {"jy_leaders"});
>
> ^
> .\jpywork\jy_leaders.java:548: ')' expected
>             Py.initProxy(this, "jy_leaders", "Main", args, 2jython_
> leaders_sandbox.jpy$packages, jy_leaders.jpy$proxyProperties, "", n
> ew String[] {"jy_leaders"});
>
>  ^
> .\jpywork\jy_leaders.java:565: ')' expected
>         Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
> ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
> ring[] {"jy_leaders"});
>                     ^
> .\jpywork\jy_leaders.java:565: ';' expected
>         Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
> ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
> ring[] {"jy_leaders"});
>                                                     ^
> .\jpywork\jy_leaders.java:565: <identifier> expected
>         Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
> ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
> ring[] {"jy_leaders"});
>                                                          ^
> .\jpywork\jy_leaders.java:565: '{' expected
>         Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
> ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
> ring[] {"jy_leaders"});
>
>
>                                    ^
> .\jpywork\jy_leaders.java:569: '}' expected
> ^
> 9 errors
>
> ERROR DURING JAVA COMPILATION... EXITING
> 
> Any help would be of great assistance -- thanks in advance.



From tjreedy at udel.edu  Thu Nov 16 22:04:52 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 16 Nov 2006 22:04:52 -0500
Subject: dict.reserve and other tricks
References: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>
Message-ID: <ejj8sj$p55$1@sea.gmane.org>


<bearophileHUGS at lycos.com> wrote in message 
news:1163724294.126102.216870 at e3g2000cwe.googlegroups.com...
> If you keep adding elements to a CPython dict/set, it periodically
> rebuilds itself. So maybe dict.reserve(n) and a set.reserve(n) methods
> may help, reserving enough (empty) memory for about n *distinct* keys
> the programmer wants to add to the dict/set in a short future. I have
> seen that the the C API of the dicts doesn't allow this, and I don't
> know if this can be implemented modifying the dicts a bit. Do you think
> this may be useful?

Ideas for user-controlled 'performance tuning' have been proposed on the 
development list.  GVR has rejected such as more trouble than they are 
worth.  Instead, effort has gone into making the implementation as good as 
he and others know how.

Since you are writing extensions, you can create a built-in subclass of 
dict to experiment with.  I presume the 2.5 default dict should be a model.

Terry Jan Reedy





From ms at cerenity.org  Fri Nov 17 18:43:46 2006
From: ms at cerenity.org (Michael)
Date: Fri, 17 Nov 2006 23:43:46 +0000
Subject: Python Parallel Paradigm
References: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>
	<4556246a$0$326$e4fe514c@news.xs4all.nl>
	<1163276885.609160.163090@h54g2000cwb.googlegroups.com>
	<vCJIsbAOLlVFNwjs@alma-services.abel.co.uk>
Message-ID: <455e48a9$0$8741$ed2619ec@ptn-nntp-reader02.plus.net>

Sandy wrote:
...
> Lots of trees, but where's the Wood?
> 
> Where are concurrency/distributed models compared and discussed?


I don't know about wood, but you can find a shrubbery[*] called Kamaelia
sitting here:

   * http://kamaelia.sourceforge.net/Home

A basic (albeit now aging) tutorial as to how to take some existing code and
create components which can be used is here:
   *
http://kamaelia.sourceforge.net/cgi-bin/blog/blog.cgi?rm=viewpost&nodeid=1113495151

Perhaps usefully, there's an overview of Kamaelia in this whitepaper:
   * http://www.bbc.co.uk/rd/pubs/whp/whp113.shtml

It does miss out work from the past 18 months work since it was written
though.

Also, every single example you see here:
   * http://kamaelia.sourceforge.net/Cookbook.html

Is rather heavily parallel, except we just call our units of execution
components, components then talk in a CSP style fashion. The problem
you've *REALLY* got is making things accessible to the average developer.

That's the target audience for Kamaelia. ( If it doesn't work for that kind
of person, it's a conceptual bug in the system. )

As a result we normally refer to components being really simple,
communicating with the outside world via inboxes and outboxes (think
a person at a desk with some in-trays and out-trays).

Why? Because this is directly analogous to the ideas in both CSP *and* Unix
pipelines - the latter has been long understood by unix people as a way of
making it easier to build systems, the former understood largely by people
interested in parallelism as a good mechanism.

It also provices a nice route for development of new components - you
simply solve the core of the problem you wanted to solve, and then
remove the inputs back to inboxes and remove outputs back to outboxes.
It doesn't work for every class of problem, but does for a suprising
number.

We're in the process of revamping the website at the moment (it's November).
But for the moment, a simple tutorial on how the core concurrency tools in
Kamaelia fundamentally work is here:
   * http://kamaelia.sourceforge.net/MiniAxon/

(The tutorial was originally written for a pre-university who'd learnt
python the previous week)

One interesting fact though - we have an application for collaborative
whiteboarding where each whiteboard is both a client & server, and they
can form a collaboration tree - whereby everything scribbled and said (each
whiteboard contains an audio mixer) is distributed to everyone connected in
a P2P like fashion. It's a classic example of a desktop application with a
small twist, and was written because we needed it. 

The reason it's interesting is because it's highly parallel, with around
70 active components normally. *IF* the baseclass was changed to put
the generators in seperate threads, and ran under a Python VM that could
actually make the threads utilise seperate CPU's effectively (as allegedly
the IronPython VM does), then you'd be able to utilise a 60, 70 odd
multicore CPU with no change to the application code.

It's a nice example of a real world application written to solve a specific
need (we split the team multisite and needed an audio & scribbling based)
collaboration tool which is able to work effectively on existing hardware
systems, and *SHOULD* be trivially scalable to massively multicore systems
as VMs and CPUs become available, with no real change to the application
code. (Small change to Axon - our concurrency mechanism would be needed as
noted above. Obviously at the moment that change makes no sense to us)

It's also interesting because it was simpler to write due to the way we
make concurrency available (by thinking in terms of components that form
pipelines & graphlines), rather than despite using concurrency. (The initial
version took around 3 days)

If you want more detail on the whiteboard, there's been a tutorial in the
past month's Linux Format (ie December issue).

If you're interested in discussing anything concurrency related, and need a
forum to do so, you're more than welcome to use the Kamaelia mailing list
for doing so.

Kamaelia's hardest core goal is to make concurrency actually USEFUL for the
average developer. (though we tend to target maintenance over initial
development - which doesn't always makes life easier initially) That said,
we seem to be getting somewhere.

> There's Stackless Python (which I can't make head or tail of; I have been
> unable to find any lucid overview,

Finally, if the descriptions you find on the Kamaelia website don't make
sense to you, PLEASE tell us. I consider that as much of a bug as anything
else. (and we can't know that without being told)

Regards,


Michael.
--
Kamaelia Project Lead/Dust Puppy
http://kamaelia.sourceforge.net/Home
http://yeoldeclue.com/blog

[*] (yes, it's a deliberate mispelling of Camellia, which is a shrubbery,
     rather than a backronym)



From robert.kern at gmail.com  Fri Nov 17 19:33:43 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 18:33:43 -0600
Subject: Decimal() instead of float?
In-Reply-To: <ejlidj$869$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper>	<ej9epb$e23$2@sea.gmane.org><1163511997.4675.88.camel@pepper>	<4559F828.7070704@holdenweb.com><ejeuqb$ldd$1@sea.gmane.org>	<1163794251.5107.151.camel@pepper><ejl5s5$334$1@sea.gmane.org>	<1163800304.5107.179.camel@pepper>	<ejlgb0$33s$1@sea.gmane.org>	<ejlhco$5j1$1@sea.gmane.org>
	<ejlidj$869$1@sea.gmane.org>
Message-ID: <ejlkdk$d4k$1@sea.gmane.org>

Robert Kern wrote:
> Fredrik Lundh wrote:
>> Terry Reedy wrote:
>>
>>> This is far more accurate than any measured latitude could be.
>> you're saying that we don't measure geographical positions on an atomic 
>> scale? ;-)
>>
>> (it's too late for serious calculations, but I'd guess we're talking 
>> ?ngstr?ms here, right?)
> 
> The meter was originally defined to be 1e-7 of the distance between the equator
> and the North pole, so 1 degree of latitude is roughly 1e7 m/90 ~ 1e5 m. 1e-16 *
> 1e5 = 1e-11, 1/10th of an ?ngstr?m.

Oops. Most of the latitude values will have 2 digits before the decimal point,
so in fact, we need 1e-14 deg * 1e5 m/deg = 1e-9 m or 10 ?ngstr?ms.

The quoted precision of the actual values that the OP used as examples is about
1e-7 deg * 1e5 m/deg = 1e-2 m.

-- 
Robert Kern

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



From jUrner at arcor.de  Tue Nov 28 16:01:52 2006
From: jUrner at arcor.de (jUrner at arcor.de)
Date: 28 Nov 2006 13:01:52 -0800
Subject: Reading text labels from a Win32 window
In-Reply-To: <1164737556.265751.38680@l12g2000cwl.googlegroups.com>
References: <1164737556.265751.38680@l12g2000cwl.googlegroups.com>
Message-ID: <1164747712.627907.279640@14g2000cws.googlegroups.com>


geskerrett at hotmail.com schrieb:

> Does anyone know of a way to read text labels from a Win32 application.
> I am familiar with using pywin32 and the SendMessage function to
> capture text from Buttons,text boxex, comboboxes, etc, however, the
> text I am would like to capture doesn't appear to be in a control.


This article tells the whole story

"The secret life of GetWindowText"
http://blogs.msdn.com/oldnewthing/archive/2003/08/21/54675.aspx

And for the headaches, see

"How to retrieve text under the cursor"
http://blogs.msdn.com/oldnewthing/archive/2004/04/23/118893.aspx


Anyway, msdn is the better address for problems like these.

Regards J?rgen



From ronrsr at gmail.com  Tue Nov 28 00:39:19 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 21:39:19 -0800
Subject: splitting a long string into a list
Message-ID: <1164692359.274433.239710@n67g2000cwd.googlegroups.com>

I have a single long string - I'd like to split it into a list of
unique keywords. Sadly, the database wasn't designed to do this, so I
must do this in Python - I'm having some trouble using the .split()
function, it doesn't seem to do what I want it to - any ideas?

thanks very much for your help.

r-sr-


longstring = 'Agricultural subsidies; Foreign aidAgriculture;
Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
Childhood Development, Birth Defects; Toxic ChemicalsAntibiotics,
AnimalsAgricultural Subsidies, Global TradeAgricultural
SubsidiesBiodiversityCitizen ActivismCommunity
GardensCooperativesDietingAgriculture, CottonAgriculture, Global
TradePesticides, MonsantoAgriculture, SeedCoffee, HungerPollution,
Water, FeedlotsFood PricesAgriculture, WorkersAnimal Feed, Corn,
PesticidesAquacultureChemical
WarfareCompostDebtConsumerismFearPesticides, US, Childhood Development,
Birth DefectsCorporate Reform,  Personhood (Dem. Book)Corporate Reform,
 Personhood, Farming (Dem. Book)Crime Rates, Legislation,
EducationDebt, Credit CardsDemocracyPopulation, WorldIncomeDemocracy,
Corporate Personhood, Porter Township (Dem. Book)Disaster
ReliefDwellings, SlumsEconomics, MexicoEconomy, LocalEducation,
ProtestsEndangered Habitat, RainforestEndangered SpeciesEndangered
Species, Extinctionantibiotics, livestockAgricultural subsidies;
Foreign aid;Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals;Antibiotics, Animals;Agricultural Subsidies, Global
Trade;Agricultural Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agriculture, Cotton;Agriculture, Global
Trade;Pesticides, Monsanto;Agriculture, Seed;Coffee, Hunger;Pollution,
Water, Feedlots;Food Prices;Agriculture, Workers;Animal Feed, Corn,
Pesticides;Aquaculture;Chemical
Warfare;Compost;Debt;Consumerism;Fear;Pesticides, US, Childhood
Development, Birth Defects;Corporate Reform,  Personhood (Dem.
Book);Corporate Reform,  Personhood, Farming (Dem. Book);Crime Rates,
Legislation, Education;Debt, Credit Cards;Democracy;Population,
World;Income;Democracy, Corporate Personhood, Porter Township (Dem.
Book);Disaster Relief;Dwellings, Slums;Economics, Mexico;Economy,
Local;Education, Protests;Endangered Habitat, Rainforest;Endangered
Species;Endangered Species, Extinction;antibiotics,
livestock;Pesticides, Water;Environment, Environmentalist;Food, Hunger,
Agriculture, Aid, World, Development;Agriculture, Cotton
Trade;Agriculture, Cotton, Africa;Environment, Energy;Fair Trade (Dem.
Book);Farmland, Sprawl;Fast Food, Globalization, Mapping;depression,
mental illness, mood disorders;Economic Democracy, Corporate
Personhood;Brazil, citizen activism, hope, inspiration, labor
issues;citizen activism, advice, hope;Pharmaceuticals, Medicine,
Drugs;Community Investing;Environment, Consumer Waste Reduction,
Consumer Behavior and Taxes;Hunger, US, Poverty;FERTILITY,
Women;Agricultural subsidies; Foreign aid;Agriculture; Sustainable
Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
Development, Birth Defects; Toxic Chemicals;Antibiotics,
Animals;Agricultural Subsidies, Global Trade;Agricultural
Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agricultural subsidies; Foreign
aid;Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals;Antibiotics, Animals;Agricultural Subsidies, Global
Trade;Agricultural Subsidies;Biodiversity;Citizen Activism;Community
Gardens;Cooperatives;Dieting;Agriculture, Cotton;Agriculture, Global
Trade;Pesticides, Monsanto;Agriculture, Seed;Coffee, Hunger;Pollution,
Water, Feedlots;Food Prices;Agriculture, Workers;Animal Feed, Corn,
Pesticides;Aquaculture;Chemical
Warfare;Compost;Debt;Consumerism;Fear;Pesticides, US, Childhood
Development, Birth Defects;Corporate Reform,  Personhood (Dem.
Book);Corporate Reform,  Personhood, Farming (Dem. Book);Crime Rates,
Legislation, Education;Debt, Credit Cards;'



From timr at probo.com  Thu Nov 23 16:42:19 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 23 Nov 2006 21:42:19 GMT
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
	<mailman.572.1164180524.32031.python-list@python.org>
Message-ID: <fc5cm25l3gucqd70gtbfk9adqnoaq859e7@4ax.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote:

>"flamesrock" <flamesrock at gmail.com> wrote:
>
>8<----------------------------------
>
>> .... since the statement itself
>> occurs at one time instant..
>
>nothing, but nothing, can occur at one time instant....

Well, as long as we're being pedantic, surely that should read "only one
thing can occur at any time instant..."
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From nospam at domain.tld  Sat Nov 18 07:44:17 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Sat, 18 Nov 2006 13:44:17 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<001501c70a50$440b4840$03000080@hendrik>
	<mailman.343.1163776096.32031.python-list@python.org>
Message-ID: <ejmv71$k3e$1@kohl.informatik.uni-bremen.de>

Steve Holden wrote:

> Anyone with an interest in secure Python should take a look at what
> Brett Cannon is doing in his postgraduate work. There have been some
> discussions on the python-dev list.

Can you some links to his work, the discussions or some other starting
point?

Stephan



From horpner at yahoo.com  Thu Nov 30 13:32:11 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Nov 2006 19:32:11 +0100
Subject: Trying to understand rfc822.Message() behaviour
References: <1164910937.624693.315950@l12g2000cwl.googlegroups.com>
Message-ID: <slrnemu8vo.4k.horpner@FIAD06.norwich.edu>

On 2006-11-30, Phoe6 <orsenthil at gmail.com> wrote:
> Hi all,
> Have  a look at this snippet, I have a file direct.txt and I want to
> read it as rfc8222.Message() so that I get the Subject: and Mood: as
> Dict Keys and content separately, but I am unable to get the Content
> Properly.
>
>>>> fhandle = open('direct.txt','r')
>>>> print fhandle.read()
> Subject: testing - fortune
> Mood: happy
>
>
>   "Why should we subsidize intellectual curiosity?"
>   - Ronald Reagan
>
>
>>>> fhandle.seek(0)
>>>> import rfc822
>>>> message = rfc822.Message(fhandle)
>>>> print message
> Subject: testing - fortune
> Mood: happy
>
>>>>
>
> What is happening here. Why is the message not coming up?

>From the Python Documentation 12.11.1 Message Objects:

  class Message( file[, seekable]) 

    A Message instance is instantiated with an input object as
    parameter. Message relies only on the input object having a
    readline() method; in particular, ordinary file objects
    qualify. Instantiation reads headers from the input object up
    to a delimiter line (normally a blank line) and stores them
    in the instance. The message body, following the headers, is
    not consumed. 

-- 
Neil Cerutti
We dispense with accuracy --sign at New York drug store


From gilbert3b2g at msn.com  Fri Nov 17 23:08:25 2006
From: gilbert3b2g at msn.com (jim)
Date: 17 Nov 2006 20:08:25 -0800
Subject: decompiler
Message-ID: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>

Is there such thing as a free decompile that I can run in windows xp



From jackson at hotmail.com  Fri Nov 10 19:13:53 2006
From: jackson at hotmail.com (Jackson)
Date: Fri, 10 Nov 2006 16:13:53 -0800
Subject: Inheritance Question
Message-ID: <ej34k1$6oh$1@skeeter.ucdavis.edu>

I've got an inheritance question and was hoping brighter minds could
guide me.  I am in the strange situation where some of the methods in a
subclass are actually more general than methods in a superclass.  What
is the preferred way to handle such situations.  My original thought was
to do something like this:

class AA(object):
	def general_method(): pass

class A(AA):
   # redefine general_method() to call a
   # restricted version of AA.general_method()

class B(A,AA):
   # redefine general_method() to call AA.general_method()

This seems ugly to me, and I am wondering if there is a better method.
So any suggestions would be appreciated.


Thanks!






-----------

For a more "concrete" example:

Suppose all the animals in the world have only 1 or 2 legs.
	
class Legs(object)
  def run(): pass
  def walk(number_of_legs):
    # lots of commands
    # that do not depend on the
    # number of legs but definitely
    # have to do with walking

    if number_of_legs == '1':
       # blah blah

    if number_of_legs == '2':
       # blah blah

    # more commands

class HasAtLeastOneLeg(Legs):
  def walk():
    # Legs.walk(number_of_legs=1)

class HasTwoLegs(HasAtLeastOneLeg,Legs):
  def walk()
    # Legs.walk(number_of_legs=2)

# isinstance(HasTwoLegs, HasAtLeastOneLeg) --> True


From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 21:14:59 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 13:14:59 +1100
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.12.02.14.58.565795@REMOVE.THIS.cybersource.com.au>

On Sat, 11 Nov 2006 17:42:32 -0800, Dustan wrote:

>> alright, let's try again: why do you need a self-contained reduce
>> replacement that can be embedded inside a list comprehension ?
>>
>> </F>
> 
> 
>>>> foo =\
> [[[1,2,3],[4,5,6],[7,8,9]],
>  [[3,2,1],[6,5,4],[9,8,7]]]
> 
> Here, foo appears to be a 3-dimensional list - except it's supposed to
> be 2-dimensional. The inner-list-of-lists is a result of how I'm
> producing the data, and now I want to do a mass-concatenation (or
> extending) of the inner-list-of-lists, and come up with this result:
> 
>>>> foo == [[1,2,3,4,5,6,7,8,9],[3,2,1,6,5,4,9,8,7]]
> True
> 
> What's the best way to accomplish this?

I don't know if this is the best, but it didn't take long to come up with
it:

>>> foo = [[[1,2,3],[4,5,6],[7,8,9]],
... [[3,2,1],[6,5,4],[9,8,7]]]
>>>
>>> def unroll(list3d):
...     newl = []
...     for sublist in list3d:
...             newl.append(sum(sublist, []))
...     return newl
...
>>> bar = unroll(foo)
>>> bar
[[1, 2, 3, 4, 5, 6, 7, 8, 9], [3, 2, 1, 6, 5, 4, 9, 8, 7]]


Repeat after me: 

"Not everything has to be a one-liner."


If sum() is too slow, because your sub-lists are huge, you can easily
factor that out and replace it with something using extend.


-- 
Steven.



From walterbyrd at iname.com  Sat Nov 18 13:54:45 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 18 Nov 2006 10:54:45 -0800
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <mailman.422.1163871294.32031.python-list@python.org>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
	<1163810800.915170.48580@e3g2000cwe.googlegroups.com>
	<1163868294.131526.308080@e3g2000cwe.googlegroups.com>
	<mailman.422.1163871294.32031.python-list@python.org>
Message-ID: <1163876085.013472.130390@f16g2000cwb.googlegroups.com>


Fredrik Lundh wrote:

>
> modularity, modularity, and modularity.
>

Can't PHP be made to be just as modular?

As a matter of popular practise, I suppose that is not done. I would
think that it could be.

My big problem with PHP is the lack of backward compatibility. My big
problem with Python is that  popular frameworks like django and
turbogears have sky-high system requirements. Few web-hosters have
Apache 2.X, mod_python 3.x, FastCGI, or Python 2.4.



From bj_666 at gmx.net  Fri Nov 10 12:06:08 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 10 Nov 2006 18:06:08 +0100
Subject: SyntaxError: Invalid Syntax.
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.10.17.06.08.725798@gmx.net>

In <1163178099.156160.29280 at k70g2000cwa.googlegroups.com>, ronrsr wrote:

> def connect():
> 
> 
>    return =  MySQLdb.connect (host = "db91x.xxxx.com",
            ^

You can't assign to a keyword.  Just leave this ``=`` out.

Ciao,
	Marc 'BlackJack' Rintsch


From bborcic at gmail.com  Fri Nov 17 06:45:22 2006
From: bborcic at gmail.com (Boris Borcic)
Date: Fri, 17 Nov 2006 12:45:22 +0100
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <xqxy7qbfjaw.fsf@cola3.ca.boeing.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<455c2773$1@news.unimelb.edu.au>
	<mailman.233.1163671524.32031.python-list@python.org>
	<xqxy7qbfjaw.fsf@cola3.ca.boeing.com>
Message-ID: <455da0ff$1_5@news.bluewin.ch>

Harry George wrote:
> 
> Personally, I've never gotten jpype to work.  Is it just me, or is it
> a troublesome install?
> 

It worked for my purpose (connecting to a 4D database via JDBC over Open4D, as 
the ODBC driver for that db is really horrible) until I tried to use this setup 
together with cherrypy, what crashed loudly and consistently for reasons I 
failed to discern. Some initial [class]path issues, as well.

Cheers, BB


From fredrik at pythonware.com  Thu Nov  2 13:23:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 19:23:21 +0100
Subject: Python in sci/tech applications
In-Reply-To: <eidcb3$op2$1@news.albasani.net>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<eidcb3$op2$1@news.albasani.net>
Message-ID: <eidd2k$ofj$1@sea.gmane.org>

robert wrote:

> Is it really not possible to create extension libs with
 > older MSVC or Mingw, which work with regular Python binaries
 > version 2.4 and 2.5 ?

last time I tried, it took me 20 minutes from that I typed "mingw" into 
google until I had built and tested my first non-trivial extension. your 
milage may vary.

</F>



From nick at craig-wood.com  Thu Nov  9 09:30:06 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 09 Nov 2006 08:30:06 -0600
Subject: Sorted list - how to change it
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
	<eiutv1$jvh$1@ork-un.noris.net>
	<mailman.1969.1163071631.11739.python-list@python.org>
Message-ID: <slrnel6dve.360.nick@irishsea.home.craig-wood.com>

Tim Chase <python.list at tim.thechases.com> wrote:
>  Just a caveat from past experience...while the OP was talking 
>  about lists, for future reference random.shuffle() chokes on 
>  strings (and possibly tuples).  It requires the ability to edit 
>  the target/parameter in place...a functionality that strings 
>  don't provide.

You can always use array.array('c'), eg

   >>> import random
   >>> import array
   >>> L = array.array('c')
   >>> L.fromstring("hello")
   >>> L
   array('c', 'hello')
   >>> random.shuffle(L)
   >>> L
   array('c', 'elohl')
   >>> L.tostring()
   'elohl'

Which is some way towards a mutable string...

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


From gagsl-py at yahoo.com.ar  Fri Nov 24 21:06:47 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 24 Nov 2006 23:06:47 -0300
Subject: windows background process
In-Reply-To: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
References: <1164241677.007294.122880@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061124225722.01fd22e0@yahoo.com.ar>

At Wednesday 22/11/2006 21:27, Podi wrote:

>3.
>os.spawnl(os.P_NOWAIT, 'mycmd.exe', 'myargs') # mycmd.exe not started
>os.spawnv(os.P_NOWAIT, 'mycmd.exe', tuple('myargs')) # mycmd.exe not
>started

os.spawnl(os.P_NOWAIT, 'mycmd.exe', 'mycmd.exe', 'first_arg', 'second_arg')
That is, you must provide explicitely the value for argv[0] (executable)
Remember to quote appropiately any parameter with embedded spaces 
(including the executable). On Python 2.5 you could use subprocess.list2cmdline


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From antroy at gmail.com  Thu Nov  2 08:42:46 2006
From: antroy at gmail.com (Ant)
Date: 2 Nov 2006 05:42:46 -0800
Subject: The Python Journal
In-Reply-To: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
References: <1162442611.407124.154980@e3g2000cwe.googlegroups.com>
Message-ID: <1162474966.333979.31610@i42g2000cwa.googlegroups.com>


tleeuwenburg at gmail.com wrote:
...
> We'd love it if you could have a look at our first issue, and let us
> know what you think!

On the layout of the site:

1) I have to hit two separate Download buttons to get the PDF, and then
the PDF must be viewed in an external reader rather than the browser
plugin.
2) It appears that there are 3 publications to read, where in fact the
third (The Python Journal itself) is an amalgam of the previous two
documents. There should be some indication of this in the abstract
(e.g. either a note in the Journal abstract that it consists of the
previous articles, or a note in the article abstracts that it is a
chapter in the journal)
3) I have to scan past two PDF pages to get to any actual content in
the PDF's.
4) It would be nice to have an HTML view of these PDFs to save the
irritation of waiting for the document to download and the PDF Reader
from starting up.

I realise that many of these issues could be limitations of the
cgpublisher website, but those are my gripes with the site in any case.

On the content of the first article:

1) There's a typo (well, indentation error) in the very first example
(Text 2).
2) The title of the first article seems to promise more than it
delivers. There are stacks of Python idioms, and this is merely one of
them. If this is the first of many 'Idiom ' articles, it would be
better to have a subtitle as to the nature of this specific idiom,
something like "Access control in Python" or similar, with a mention of
the actual name-mangling that goes on on 'private' attributes.

HTH.

Is the intention that this will be a free or non-free (or somewhere in
between) journal BTW?



From bearophileHUGS at lycos.com  Thu Nov  2 14:01:38 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Nov 2006 11:01:38 -0800
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1678.1162491833.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<eidcb3$op2$1@news.albasani.net>
	<mailman.1678.1162491833.11739.python-list@python.org>
Message-ID: <1162494098.703450.10990@m73g2000cwd.googlegroups.com>

Fredrik Lundh:
> last time I tried, it took me 20 minutes from that I typed "mingw" into
> google until I had built and tested my first non-trivial extension. your
> milage may vary.

But probably before those 20 minutes there is a lot of time of
experience of yours with CPython sources, other compilers, and so on,
so for most people this timing comparison just means "It can be done"
:-)

Bye,
bearophile



From fred at adventistcare.org  Mon Nov 20 10:52:40 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Mon, 20 Nov 2006 10:52:40 -0500
Subject: basic python questions
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E37C@accmail2.sunbelt.org>

since you're using .net, you might want to take a look at IronPython.  It's
not something I use, but I've heard good things.

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of nateastle at gmail.com
Sent: Saturday, November 18, 2006 10:09 AM
To: python-list at python.org
Subject: Re: basic python questions


I am currently going to school at Utah Valley State College, the course
that I am taking is analysis of programming languages. It's an upper
division course but our teacher wanted to teach us python as part of
the course, he spent about 2 - 3 weeks on python which has been good. I
currently work with .net and it is fun to see what other languages have
and what sytax they use.

Paul McGuire wrote:
> <nateastle at gmail.com> wrote in message
> news:1163829271.660193.70450 at j44g2000cwa.googlegroups.com...
> >I have a simple assignment for school but am unsure where to go. The
> > assignment is to read in a text file, split out the words and say which
> > line each word appears in alphabetical order. I have the basic outline
> > of the program done which is:
> >
>
> And in general, this is one of the best "can anyone help me with my
> homework?" posts I've ever seen.
> A. You told us up front that it was your homework.
> B. You made an honest stab at the solution before posting, and posted the
> actual code.
> C. You ended with some specific questions on things that didn't work or
that
> you wanted to improve.
>
> Your current program looks like at least A- material.  Add use of sorted
and
> enumerate, and handle that exception a little better, and you're getting
> into A+ territory.
>
> Out of curiosity, what school are you attending that is teaching Python,
and
> under what course of study?
> 
> -- Paul

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



From metaperl.etc at gmail.com  Mon Nov  6 14:29:23 2006
From: metaperl.etc at gmail.com (metaperl.etc at gmail.com)
Date: 6 Nov 2006 11:29:23 -0800
Subject: building python with utf-8 default encoding?
Message-ID: <1162841363.747050.79790@b28g2000cwb.googlegroups.com>

I am playing around with OpenSwarm and was shocked to see that I cannot
build Python with default encoding of utf-8 by passing a flag to
configure... did I miss the option for doing so?



From fredrik at pythonware.com  Fri Nov 17 05:38:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 11:38:14 +0100
Subject: Bitwise operators. Differences from javascript and PHP.
In-Reply-To: <1163758737.890309.21950@e3g2000cwe.googlegroups.com>
References: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
	<1163758737.890309.21950@e3g2000cwe.googlegroups.com>
Message-ID: <ejk3em$cf$1@sea.gmane.org>

John Machin wrote:

> http://theopensourcery.com/phplogic.htm
> 
> "In effect the bitwise operations [words "can be" omitted, I presume]

"can only be", more likely.

> safely applied to integer variables - their effect on booleans,
> float/double or string variables can be predicted but are not really
> useful" ???

sounds like we're in

 >>> v = float(4653896912)
 >>> from string import pack, unpack
 >>> o = unpack("i", pack("d", v)[:4])[0]
 >>> (-o>>(13-3))|-2<<(32-13-1)
-212992

territory.

</F>



From horpner at yahoo.com  Fri Nov 10 08:54:04 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 14:54:04 +0100
Subject: Py3K idea: why not drop the colon?
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
Message-ID: <slrnel915m.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-10, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Thu, 09 Nov 2006 14:44:21 -0600, Tim Chase
><python.list at tim.thechases.com> declaimed the following in
> comp.lang.python:
>
>> A few arbitrary warts per-dictum of BDFL are fine though...it 
>> still looks much cleaner compared to PHP & Perl ;-)
>>
> 	Or line continuation in REXX... Where you get such oddities as:
>
> 	call xyz(a, b, c, ,
> 			d, e, f)
>
> That is NOT a NULL argument between c and d... The first comma
> is the argument separator, the second comma is the
> to-be-continued marker

Eyiyi! That's yugly.

The colon's main purpose seems to be to allow one-liners:

Easy to parse: if a < b: a += 1
Hard to parse if a < b a += 1

-- 
Neil Cerutti
When you're in the public eye, it's wrong to cheat on someone, unless
you're very careful. If you're normal and no one's going to know, then
do it. --Paris Hilton


From onurb at xiludom.gro  Mon Nov 13 05:50:54 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 13 Nov 2006 11:50:54 +0100
Subject: how is python not the same as java?
In-Reply-To: <mailman.2035.1163170200.11739.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>	<mailman.2014.1163123991.11739.python-list@python.org>	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<mailman.2035.1163170200.11739.python-list@python.org>
Message-ID: <45584e10$0$32008$426a74cc@news.free.fr>

Jorge Vargas wrote:
> On 9 Nov 2006 18:09:37 -0800, John Machin <sjmachin at lexicon.net> wrote:
>>
>> Jorge Vargas wrote:
>> > On 9 Nov 2006 16:44:40 -0800, gavino <bootiack at yahoo.com> wrote:
>> > > both are interpreted oo langauges......
>> > >
>> > that is not correct java is compiled and the VM interprets the code
>>
>> ... and what do you think is in those pesky little .pyc files you may
>> have noticed lying around on your hard disk?
>>
> can you open a commandline

Open it with what ? A knife ?

> and start writting java code? no

And ? Some implementations of at least Haskell, OCaml, and Common Lisp
are compiled, and still offer a REPL.

> the division between java (runtime) and javac is very explicit,

And ?

> the
> compiler catches a lot of things, in python this is threaded in a
> totally different way.
> 
> the pyc files are just a "catching" system for the common python
> developer

The pyc files are binary files containing Python byte-code.

>, as for the java developer the .class files are executable
> code. In python noone runs the pyc files, the interpreter takes care
> of this for you.

And ? The fact that the Python runtime is smart enough (lol) to silently
 call the compiler when needed doesn't make Python (well, CPython...)
more or less "interpreted" or "compiled".


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From robert.kern at gmail.com  Fri Nov 17 13:40:56 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 12:40:56 -0600
Subject: numpy magic: cast scalar returns auto to python types float &
	int   ?
In-Reply-To: <ejkmmp$p6$1@news.albasani.net>
References: <ejk69e$2g1$1@news.albasani.net>	<mailman.337.1163769761.32031.python-list@python.org>
	<ejkmmp$p6$1@news.albasani.net>
Message-ID: <ejkvo6$d4i$1@sea.gmane.org>

robert wrote:

> Didn't find the relevant reasoning within time. Yet guess the reason is isolated-module-centric. 

I gave you a brief rundown on this list already.

  http://mail.python.org/pipermail/python-list/2006-October/411145.html

And I'll note again that a fuller discussion is given in Chapter 2 of the _Guide
to NumPy_.

  http://numpy.scipy.org/numpybooksample.pdf

And yet again, the best place for numpy questions is the numpy mailing list, not
here. Here, you will get maybe one or two people responding to you, usually me,
and I'm a cranky SOB. There you will get much nicer people answering your
questions and more fully.

  http://www.scipy.org/Mailing_Lists

-- 
Robert Kern

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



From will at willNOmcguganSPAM.com  Thu Nov 23 14:28:26 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Thu, 23 Nov 2006 19:28:26 +0000
Subject: Python work in UK
Message-ID: <4565f638$0$2447$db0fefd9@news.zen.co.uk>

Hi,

I'd love to work in Python, for the sake of my blood pressure, but there 
doesnt seem to be that many jobs that look for Python as the main skill. 
I use Python at work from time to time, and occasionaly get to spend 
several days on a Python project but the majority of the time I use C++. 
How can I make that leap to working with Python? There doesn't seem to 
be many UK positions on the jobs section of Python.org or the usual jobs 
sites. Any recommended jobs sites or tips? (I have googled)

In the off chance that a potential empolyer is reading this, I'm looking 
for something in web development, applications, graphics or other 
interesting field. Here is a copy of my CV.

http://www.willmcgugan.com/cvwillmcgugan.pdf

Regards,

Will McGugan
-- 
http://www.willmcgugan.com


From nateastle at gmail.com  Sun Nov 19 01:15:07 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 18 Nov 2006 22:15:07 -0800
Subject: basic python questions
In-Reply-To: <4s8u91Fumc9aU1@mid.uni-berlin.de>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
Message-ID: <1163916907.180580.238800@h54g2000cwb.googlegroups.com>

So I implemented the exception spcified and in testing it returns:

DeprecationWarning: raising a string exception is deprecated

I am not to worried about depreciation warning however, out of
curiosity, what would the better way be to handle this? Is there a way
that (web site, help documentation, etc...) I would be able to find
this? I am running this in Python 2.5

Diez B. Roggisch wrote:
> nateastle at gmail.com schrieb:
> > I have taken the coments and think I have implemented most. My only
>
> Unfortunately, no.
>
> > question is how to use the enumerator. Here is what I did, I have tried
> > a couple of things but was unable to figure out how to get the line
> > number.
> >
> > def Xref(filename):
> >     try:
> >         fp = open(filename, "r")
> >     except:
> >         raise "Couldn't read input file \"%s\"" % filename
>
> You still got that I-catch-all-except in there.
> This will produce subtle bugs when you e.g. misspell a variable name:
>
> filename = '/tmp/foo'
> try:
>     f = open(fliename, 'r')
> except:
>     raise "can't open filename"
>
>
> Please notice the wrong-spelled 'fliename'.
>
> This OTOH will give you more clues on what really goes wrong:
>
>
>
> filename = '/tmp/foo'
> try:
>     f = open(fliename, 'r')
> except IOError:
>     raise "can't open filename"
> 
> 
> Diez



From horpner at yahoo.com  Thu Nov  9 09:11:19 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 9 Nov 2006 15:11:19 +0100
Subject: Can not download plugins for jEdit (help!!)
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
Message-ID: <slrnel6dq5.1ns.horpner@FIAD06.norwich.edu>

On 2006-11-09, Ant <antroy at gmail.com> wrote:
>> Vim, it can handle all the things.http://www.vim.org/
>
> I'm not convinced of that quite yet. jEdit's syntax
> highlighting seems more robust (see SocketServer.py in the
> standard library for an example - vim gets the highlighting of
> the first doc-comment wrong).

Code inside strings, e.g., doctests, breaks the synchronization
code. I fixed this for myself by adopting the convention in my
code that all closing """ are at the end of a line, while opening
""" never are. Then I changed the synchronize declarations in
/syntax/python.vim to the following:

  syn sync match pythonSync grouphere NONE '"""$'
  syn sync maxlines=300

The above is no good for random Python code, though.

But in random Python code you can simply increase the number of
lines inspected as high as your machine can handle, as documented
in python.vim.

> I've also not found anything like jEdit's Console plugin for
> vim. It's interactive. You can run the current buffer in the
> console window. The console interacts with an error reporting
> pane which allows you to click on the error and it will take
> you to the appropriate line in the code that the stack trace
> indicates.

I haven't got that working in Vim, because I haven't been
irritated enough by its lack to try. Python's extremely verbose
error reports make designing errorformat a little tricky, but it
can be done, and the day may come soon.

The reason I haven't adapted quickfix mode to Python is that Vim
would hide most of the Traceback. I'd constantly be executing the
command to show the entire error message, so I've chosen to
eschew quickfix mode for Python code.

If there's some quickfix mode settings that solve these problems
I'd be happy to purloin it.

> I'm very interested in other people's vim setup for Python coding
> however, as I do use vim more than Python these days, mainly because I
> have to use it a great deal on headless servers (jEdit would be no good
> here of course) and I got fed up with adding artefacts such as
> extraneous i's, o's and :w's into my code when working with jEdit ;-)
> And it starts faster of course.

The default Python plugin provides the [[, ]] and [m, ]m commands
for jumping to the next function or method respectively. They are
a nice help once you're aware of them. There's a more powerful
plugin available on the internet, but it the code-jumps were the
main commands I wanted.

pytags should be in your Tools directory. I haven't found it
terribly useful, but in theory it's invaluable (my project is
piddly in size at the moment).

If you set shiftwidth to your preferred Python indent, then
indenting and unindenting code blocks is as easy as the < and >
commands.

-- 
Neil Cerutti


From xi at gamma.dn.ua  Sat Nov 18 15:03:03 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 22:03:03 +0200
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118195235.GA22453@phd.pp.ru>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
	<20061118192248.GB29614@58sirius016.dc.ukrtel.net>
	<20061118195235.GA22453@phd.pp.ru>
Message-ID: <20061118200303.GB3393@58sirius016.dc.ukrtel.net>

On Sat, Nov 18, 2006 at 10:52:35PM +0300, Oleg Broytmann wrote:
> On Sat, Nov 18, 2006 at 09:22:48PM +0200, Kirill Simonov wrote:
> > Preferably.  I believe that using a editor + command line will only make
> > things worse because console and GUI have different encodings under
> > Windows.
> 
>    Ouch! I am always forgetting about it, 'cause I seldom use Windows, and

Yeah, that's what Freud called displacement ;)

> even in Windows my editor is gvim. (-:

Me too.  Still it would be harsh to force students that might see a PC at
the first time to use it. ;)


Thanks,
Kirill


From steven.bethard at gmail.com  Sun Nov 26 23:44:00 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Mon, 27 Nov 2006 04:44:00 +0000 (GMT)
Subject: python-dev Summary for 2006-10-01 through 2006-10-15
Message-ID: <20061127044401.DE99E1E4007@bag.python.org>

python-dev Summary for 2006-10-01 through 2006-10-15
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-10-01_2006-10-15]



=============
Announcements
=============

-----------------------------
QOTF: Quotes of the Fortnight
-----------------------------

Martin v. Lowis on a small change to Python that wouldn't affect many applications:

    I'm pretty sure someone will notice, though; someone always notices.

Contributing thread:

- `Caching float(0.0) <http://mail.python.org/pipermail/python-dev/2006-October/069175.html>`__

Steve Holden reminds us that patch submissions are dramatically preferred to verbose thread discussions:

    This thread has disappeared down a rat-hole, never to re-emerge with anything of significant benefit to users. C'mon, guys, implement a patch or leave it alone :-)

Contributing thread:

- `Caching float(0.0) <http://mail.python.org/pipermail/python-dev/2006-October/069190.html>`__


=========
Summaries
=========

--------------
Caching floats
--------------

Nick Craig-Wood discovered that he could save 7MB in his application by adding the following simple code::

    if age == 0.0:
        age = 0.0

A large number of his calculations were producing the value 0.0, which meant that many copies of 0.0 were being stored. Since all 0.0 literals refer to the same object, the code above was removing all the duplicate copies of 0.0.

Skip Montanaro and played around a bit with floatobject.c, and found that Python's test suite allocated a large number of small integral floats (though only a couple hundred were generally allocated at the same time). Kristjan V. Jonsson played around with caching for float values between -10.0 and 10.0 with the EVE server and got a 25% savings in allocations.

There was some concern that for systems with both +0.0 and -0.0, the cache might cause problems, since determining which zero you have seemed difficult. However, James Y Knight showed how to do this fairly easily in C with a double/uint64_t union. Eventually, people agreed that it should be fine to just cache +0.0.

Kristjan V. Jonsson and Josiah Carlson proposed patches, but nothing was posted to SourceForge.

Contributing threads:

- `Caching float(0.0) <http://mail.python.org/pipermail/python-dev/2006-September/069049.html>`__
- `Caching float(0.0) <http://mail.python.org/pipermail/python-dev/2006-October/069092.html>`__

--------------------------------------------
Buffer overrun in repr() and Python releases
--------------------------------------------

The implications of PSF-2006-001_, a buffer overrun problem in repr(), were considered for the various Python releases. The bug had been fixed before Python 2.5 was released, and had been applied to the Python 2.4 branch shortly before Python 2.4.4 was released. The security advisory provided patches for both Python 2.3 and 2.4, but to make sure that full source releases were available for all major versions of Python still in use, it looked like there would be a source-only 2.3.6 release (source-only because neither Mac nor Windows builds were affected).

.. _PSF-2006-001: http://www.python.org/news/security/PSF-2006-001/

Contributing threads:

- `Security Advisory for unicode repr() bug? <http://mail.python.org/pipermail/python-dev/2006-October/069247.html>`__
- `2.3.6 for the unicode buffer overrun <http://mail.python.org/pipermail/python-dev/2006-October/069327.html>`__

---------------------------
Build system for python.org
---------------------------

Anthony, Barry Warsaw, Georg Brandl and others indicated that the current website build system was making releases and other updates more difficult than they should be. Most people didn't have enough cycles to spare for this, but Michael Foord said he could help with a transition to rest2web_ if that was desirable. Fredrik Lundh also suggested a few options, including his older proposal to `use Django`_. No definite plans were made though.

.. _rest2web: http://www.voidspace.org.uk/python/rest2web/
.. _use Django: http://effbot.org/zone/pydotorg-cache.htm

Contributing thread:

- `2.3.6 for the unicode buffer overrun <http://mail.python.org/pipermail/python-dev/2006-October/069327.html>`__

--------------------
String concatenation
--------------------

Larry Hastings posted a `patch for string concatenation`_ that delays the creation of a new string until someone asks for the string's value. As a result, the following code would be about as fast as the ``''.join(strings)`` idiom::

    result = ''
    for s in strings:
        result += s

To achieve this, he had to change ``PyStringObject.ob_sval`` from a ``char[1]`` array, to a ``char *``. Reaction was mixed -- some people really disliked using ``join()``, while others didn't see the need for such a change.

.. _patch for string concatenation: http://bugs.python.org/1569040

Contributing thread:

- `PATCH submitted: Speed up + for string concatenation, now as fast as "".join(x) idiom <http://mail.python.org/pipermail/python-dev/2006-October/069224.html>`__

----------------------------
PEP 315: Enhanced While Loop
----------------------------

Hans Polak revived the discussion about `PEP 315`_, which proposes a do-while loop for Python that would allow the current code::

    while True:
        <setup code>
        if not <condition>:
            break
        <loop body>

to be written instead as::

    do:
        <setup code>
    while <condition>:
        <loop body>

Hans was hoping to simplify the situation where there is no ``<loop body>`` following the ``<condition>`` test and a number of syntax suggestions were proposed to this end. In the end, Guido indicated that none of the suggestions were acceptable, and Raymond Hettinger offered to withdraw the PEP.

.. _PEP 315: http://www.python.org/dev/peps/pep-0315/

Contributing threads:

- `PEP 351 - do while <http://mail.python.org/pipermail/python-dev/2006-September/069088.html>`__
- `PEP 351 - do while <http://mail.python.org/pipermail/python-dev/2006-October/069100.html>`__
- `PEP 315 - do while <http://mail.python.org/pipermail/python-dev/2006-October/069205.html>`__

------------------------------
PEP 355: path objects rejected
------------------------------

Luis P Caamano asked about the status of `PEP 355`_, which aimed to introduce an object-oriented reorganization of Python's path-related functions. Guido indicated that the current "amalgam of unrelated functionality" was unacceptable and pronounced it dead. Nick Coghlan elaborated the "amalgam" point, explaining that `PEP 355`_ lumped together all the following:

- string manipulation operations
- abstract path manipulation operations
- read-only traversal of a concrete filesystem
- addition and removal of files/directories/links within a concrete filesystem

Jason Orendorff pointed out some other problems with the PEP:

- the motivation was weak
- the API had too many methods
- it didn't fix all the perceived problems with the existing APIs
- it would have introduced a Second Way To Do It without being clearly better than the current way

There were some rumors of a new PEP based on Twisted's filepath_ module, but nothing concrete at the time of this summary.

.. _PEP 355: http://www.python.org/dev/peps/pep-0355/
.. _filepath: http://twistedmatrix.com/trac/browser/trunk/twisted/python/filepath.py

Contributing threads:

- `PEP 355 status <http://mail.python.org/pipermail/python-dev/2006-September/069059.html>`__
- `PEP 355 status <http://mail.python.org/pipermail/python-dev/2006-October/069093.html>`__

----------------------------------
Processes and threading module API
----------------------------------

Richard Oudkerk proposed a module that would make processes usable with an API like that of the threading module. People seemed unsure as to whether it would be better to have a threading-style or XML-RPC-style API. A few other relevant modules were identified, including PyXMLRPC_ and POSH_. No clear winner emerged.

.. _PyXMLRPC: http://sourceforge.net/projects/py-xmlrpc/
.. _POSH: http://poshmodule.sourceforge.net/

Contributing thread:

- `Cloning threading.py using proccesses <http://mail.python.org/pipermail/python-dev/2006-October/069297.html>`__

------------------------------------
Python 3.0: registering methods in C
------------------------------------

After a brief exchange about which ``tp_flags`` implied which others, there was some discussion on how to simplify ``tp_flags`` for Python 3000. Raymond Hettinger suggested that the NULL or non-NULL status of a slot should be enough to indicate its presence. Martin v. Lowis pointed out that this would require recompiling extension modules for every release, since if a new slot is added, extension modules from earlier releases wouldn't even *have* the slot. Fredrik Lundh suggested a `dynamic registration method`_ instead, which would look something like::

    static PyTypeObject *NoddyType;
    NoddyType = PyType_Setup("noddy.Noddy", sizeof(Noddy));
    PyType_Register(NoddyType, PY_TP_DEALLOC, Noddy_dealloc);
    PyType_Register(NoddyType, PY_TP_DOC, "Noddy objects");
    ...
    PyType_Register(NoddyType, PY_TP_NEW, Noddy_new);
    if (PyType_Ready(&NoddyType) < 0)
        return;

People thought this looked like a good idea, and Fredrik Lundh planned to look into it seriously for Python 3000.

.. _dynamic registration method: http://effbot.org/zone/idea-register-type.htm

Contributing thread:

- `2.4.4: backport classobject.c HAVE_WEAKREFS? <http://mail.python.org/pipermail/python-dev/2006-October/069235.html>`__

-----------------------------------------
Tracker Recommendations: JIRA and Roundup
-----------------------------------------

The PSF Infrastructure Committee announced their recommendations for trackers to replace SourceForge. Both JIRA and Roundup were definite improvements over SourceForge, though the Infrastructure Committee was leaning towards JIRA since Atlassian had offered to host it for them. Roundup was still under consideration if 6-10 admins could volunteer to maintain the installation.

(More updates on this in the next summary.)

Contributing thread:

- `PSF Infrastructure Committee's recommendation for a new issue tracker <http://mail.python.org/pipermail/python-dev/2006-October/069139.html>`__

-----------------------------
PEP 302: import hooks phase 2
-----------------------------

Brett Cannon announced that he'd be working on a C implementation of phase 2 of `PEP 302`_. Phillip J. Eby pointed out that phase 2 could not be implemented in a backwards-compatible way, and so the code should be targeted at the p3yk branch. He also suggested that rewriting the import mechanisms in Python was probably going to be easier than trying to do it in C, particularly since some of the pieces were already available in the pkgutil module. Neal Norwitz strongly agreed, pointing out that string and list manipulation, which is necessary in a variety of places in the import mechanisms, is much easier in Python than in C. Brett promised a Python implementation as part of his research work.

.. _PEP 302: http://www.python.org/dev/peps/pep-0302/

Contributing thread:

- `Created branch for PEP 302 phase 2 work (in C) <http://mail.python.org/pipermail/python-dev/2006-October/069133.html>`__

------------------------------------------
Web crawlers and development documentation
------------------------------------------

Fredrik Lundh noticed that Google was sometimes finding the `development documentation`_ instead of the `current release documentation`_. A.M. Kuchling added a ``robots.txt`` to keep crawlers out of the development area.

.. _development documentation: http://docs.python.org/dev/
.. _current release documentation: http://docs.python.org/

Contributing thread:

- `what's really new in python 2.5 ? <http://mail.python.org/pipermail/python-dev/2006-October/069158.html>`__

-----------------------------------------
Buildbots, compile errors and batch files
-----------------------------------------

Tim Peters noticed that bsddb was getting compile errors on Windows but the buildbots were not reporting anything. Because some additional commands were added after the call to ``devenv.com`` in the ``build.bat`` script, the error status was not getting propagated appropriately. After Tim and Martin v. Lowis figured out how to repair this, the buildbots were again able to report compile errors.

Contributing thread:

- `2.4 vs Windows vs bsddb <http://mail.python.org/pipermail/python-dev/2006-October/069283.html>`__

---------------------------------
Python 2.5 and Visual Studio 2005
---------------------------------

Kristjan V. Jonsson showed that using Visual Studio 2005 instead of Visual Studio 2003 gave a 7% gain in speed, and a 10% gain when performance guided optimization (PGO) was enabled. While the "official" compiler can't get changed at a point release, everyone agreed that making the PCBuild8 directory work out of the box and adding an appropriate buildslave was a good idea. Kristjan promised to look into setting up a buildslave.

Contributing thread:

- `Python 2.5 performance <http://mail.python.org/pipermail/python-dev/2006-October/069338.html>`__

----------------------------------
Distributing debug build of Python
----------------------------------

David Abrahams asked if python.org would be willing to post links to the ActiveState debug builds of Python to make it easier for Boost.Python_ users to obtain a debug build. People seemed to think that Boost.Python_ users should be able to create a debug build of Python themselves if necessary.

.. _Boost.Python: http://www.boost.org/libs/python/doc/index.html

Contributing thread:

- `Plea to distribute debugging lib <http://mail.python.org/pipermail/python-dev/2006-October/069325.html>`__

-----------------------------------------
Unmarshalling/Unpickling multiple objects
-----------------------------------------

Tim Lesher proposed adding a generator to marshal and pickle so that instead of::

    while True:
        try:
            obj = marshal.load(fobj)    # or pickle.load(fobj)
        except EOFError:
            break
        ... do something with obj ...

you could write something like::

    for obj in marshal.loaditer(fobj):    # or pickle.loaditer(fobj)
        ... do something with obj ...

when you wanted to load multiple objects in sequence from the same file. Both Perforce and Mailman store objects in a way that would benefit from such a function, so it seemed like such an API might be reasonable.  No patch had been submitted at the time of this summary.

Contributing thread:

- `Iterating over marshal/pickle <http://mail.python.org/pipermail/python-dev/2006-October/069277.html>`__

-------------------------------
spawnvp and spawnvpe on Windows
-------------------------------

Alexey Borzenkov asked why spawnvp and spawnvpe weren't available in Python on Windows even though they were implemented in the CRT. He got the usual answer, that no one had submitted an appropriate patch, but that such a patch would be a reasonable addition for Python 2.6. Fredrik Lundh pointed out that the subprocess module was probably a better choice than spawnvp and spawnvpe anyway.

Contributing thread:

- `Why spawnvp not implemented on Windows? <http://mail.python.org/pipermail/python-dev/2006-October/069342.html>`__


==================
Previous Summaries
==================
- `difficulty of implementing phase 2 of PEP 302 in Python source <http://mail.python.org/pipermail/python-dev/2006-October/069116.html>`__
- `Python Doc problems <http://mail.python.org/pipermail/python-dev/2006-October/069252.html>`__
- `Signals, threads, blocking C functions <http://mail.python.org/pipermail/python-dev/2006-October/069334.html>`__

===============
Skipped Threads
===============
- `Removing __del__ <http://mail.python.org/pipermail/python-dev/2006-September/068875.html>`__
- `Tix not included in 2.5 for Windows <http://mail.python.org/pipermail/python-dev/2006-October/069095.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-October/069098.html>`__
- `HAVE_UINTPTR_T test in configure.in <http://mail.python.org/pipermail/python-dev/2006-October/069103.html>`__
- `OT: How many other people got this spam? <http://mail.python.org/pipermail/python-dev/2006-October/069117.html>`__
- `2.4.4 fixes <http://mail.python.org/pipermail/python-dev/2006-October/069160.html>`__
- `2.4.4 fix: Socketmodule Ctl-C patch <http://mail.python.org/pipermail/python-dev/2006-October/069189.html>`__
- `[Python-checkins] r51862 - python/branches/release25-maint/Tools/msi/msi.py <http://mail.python.org/pipermail/python-dev/2006-October/069201.html>`__
- `Fwd: [ python-Feature Requests-1567948 ] poplib.py list interface <http://mail.python.org/pipermail/python-dev/2006-October/069223.html>`__
- `Can't check in on release25-maint branch <http://mail.python.org/pipermail/python-dev/2006-October/069256.html>`__
- `if __debug__: except Exception, e: pdb.set_trace() <http://mail.python.org/pipermail/python-dev/2006-October/069271.html>`__
- `2.5, 64 bit <http://mail.python.org/pipermail/python-dev/2006-October/069275.html>`__
- `BUG (urllib2) Authentication request header is broken on long usernames and passwords <http://mail.python.org/pipermail/python-dev/2006-October/069284.html>`__
- `[Python-3000] Sky pie: a "var" keyword <http://mail.python.org/pipermail/python-dev/2006-October/069292.html>`__
- `Proprietary code in python? <http://mail.python.org/pipermail/python-dev/2006-October/069294.html>`__
- `DRAFT: python-dev summary for 2006-08-16 to 2006-08-31 <http://mail.python.org/pipermail/python-dev/2006-October/069299.html>`__
- `BRANCH FREEZE, release24-maint for 2.4.4c1. 00:00UTC, 11 October 2006 <http://mail.python.org/pipermail/python-dev/2006-October/069302.html>`__
- `2.4 vs Windows vs bsddb [correction] <http://mail.python.org/pipermail/python-dev/2006-October/069310.html>`__
- `RELEASED Python 2.4.4, release candidate 1 <http://mail.python.org/pipermail/python-dev/2006-October/069326.html>`__
- `ConfigParser: whitespace leading comment lines <http://mail.python.org/pipermail/python-dev/2006-October/069337.html>`__
- `Exceptions and slicing <http://mail.python.org/pipermail/python-dev/2006-October/069363.html>`__
- `Proposal: No more standard library additions <http://mail.python.org/pipermail/python-dev/2006-October/069398.html>`__
- `[py3k] Re: Proposal: No more standard library additions <http://mail.python.org/pipermail/python-dev/2006-October/069399.html>`__
- `Modulefinder <http://mail.python.org/pipermail/python-dev/2006-October/069412.html>`__
- `VC6 support on release25-maint <http://mail.python.org/pipermail/python-dev/2006-October/069426.html>`__
- `os.utime on directories: bug fix or new feature? <http://mail.python.org/pipermail/python-dev/2006-October/069431.html>`__
- `Problem building module against Mac Python 2.4 and Python 2.5 <http://mail.python.org/pipermail/python-dev/2006-October/069434.html>`__




========
Epilogue
========

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This python-dev summary is the 14th written by 
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From martin.dion at gmail.com  Sun Nov  5 07:47:56 2006
From: martin.dion at gmail.com (martdi)
Date: 5 Nov 2006 04:47:56 -0800
Subject: tips requested for a log-processing script
In-Reply-To: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>
References: <454dc438$0$14382$e4fe514c@dreader17.news.xs4all.nl>
Message-ID: <1162730876.714446.199080@e3g2000cwe.googlegroups.com>

if you are running in windows you can use the win32com module to
automate the process of generating a pivot table in excel and then code
to send it via e-mail



Jaap wrote:
> Python ers,
> As a relatively new user of Python I would like to ask your advice on
> the following script I want to create.
>
> I have a logfile which contains records. All records have the same
> layout, and are stored in a CSV-format. Each record is (non-uniquely)
> identified by a date and a itemID. Each itemID can occur 0 or more times
> per month. The item contains a figure/amount which I need to sum per
> month and per itemID. I have already managed to separate the individual
> parts of each logfile-record by using the csv-module from Python 2.5.
> very simple indeed.
>
> Apart from this I have a configuration file, which contains the list of
> itemID's i need to focus on per month. Not all itemID's are relevant for
> each month, but for example only every second or third month. All
> records in the logfile with other itemID's can be ignored. I have yet to
> define the format of this configuration file, but am thinking about a 0
> or 1 for each month, and then the itemID, like:
> "1 0 0 1 0 0 1 0 0 1 0 0 123456" for a itemID 123456 which only needs
> consideration at first month of each quarter.
>
> My question to this forum is: which data structure would you propose?
> The logfile is not very big (about 200k max, average 200k) so I assume I
> can store in internal memory/list?
>
> How would you propose I tackle the filtering of relevant/non-relevant
> items from logfile? Would you propose I use a filter(func, list) for
> this task or is another thing better?
>
> In the end I want to mail the outcome of my process, but this seems
> straitforward from the documentation I have found, although I must
> connect to an external SMTP-server.
>
> Any tips, views, advice is highly appreciated!
>
>
> Jaap
>
> PS: when I load the logfile in a spreadsheet I can create a pivot table
> which does about the same ;-] but that is not what I want; the
> processing must be automated in the end with a periodic script which
> e-mails the summary of the keyfigure every month.



From sturlamolden at yahoo.no  Sun Nov 12 10:32:05 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Nov 2006 07:32:05 -0800
Subject: numpy/scipy: correlation
In-Reply-To: <mailman.2114.1163286261.11739.python-list@python.org>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
Message-ID: <1163345525.904165.87090@e3g2000cwe.googlegroups.com>


Robert Kern wrote:

> The difference between the two models is that the first places no restrictions
> on the distribution of x. The second does; both the x and y marginal
> distributions need to be normal. Under the first model, the correlation
> coefficient has no meaning.

That is not correct. The correlation coefficient is meaningful in both
models, but must be interpreted differently. However, in both cases a
correlation coefficient of 1 or -1 indicates an exact linear
relationship between x and y.

Under the first model ("linear regression"), the squared correlation
coefficient is the "explained variance", i.e. the the proportion of y's
variance accounted for by the model y = m*x  + o.

Under the second model ("multivariate normal distribution"), the
correlation coefficient is the covariance of y and x divided by the
product of the standard deviations, cov(x,y)/(std(x)*std(y)).



From tundra at tundraware.com  Thu Nov  9 00:57:03 2006
From: tundra at tundraware.com (Tim Daneliuk)
Date: Wed, 08 Nov 2006 23:57:03 -0600
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <1163042962.854488.296190@b28g2000cwb.googlegroups.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
	<1163016063.961485.224390@k70g2000cwa.googlegroups.com>
	<n2t924-frs.ln1@eskimo.tundraware.com>
	<1163042962.854488.296190@b28g2000cwb.googlegroups.com>
Message-ID: <cisa24-4q61.ln1@eskimo.tundraware.com>

Sefyroth wrote:
> Thank you!!! I have had problems with other stuff because of this
> (mainly py2exe!)
> 
> It did the job! I thank you a lot.

My pleasure.

> 
> Just wondering though,
> 
> D:/Travaux/5?me session/B51 - Dev. de
               ^
> Syst?mes/Workspace/LMAOSoft/Controleur.py
       ^
I would guess that these are the characters causing the problem.
Strictly speaking, "ASCII" only goes from 0-127 IIRC with the
high bit being sort of system dependent (I could be wrong, but
that seems to tickle something deep in ancient memories).

> That's my filepath, what is not ASCII in there? ?????
> 
> Just checked and it's 138 in ascii... Anyway, thanks a lot
> 
> Christian
> 
> 
> Tim Daneliuk wrote:
>> Sefyroth wrote:
>>> Thanks,
>>>
>>> but I get this error when I try this.
>>>
>>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
>>> position 12: ordinal not in range(128)
>>>
>>>  I had encountered it with the askdirectory method as well. Is there an
>>> easy way to bypass this?
>>>
>>> Thanks again
>> I believe you are running into a directory or file name that has
>> non-ascii characters in it.  Python as shipped is set up to
>> deal with ascii as its native encoding format.  You can change
>> this by editing the "site.py" file - look in the Lib directory
>> in your python installation.  Look for this code:
>>
>> -------------------------------
>> def setencoding():
>>      """Set the string encoding used by the Unicode implementation.  The
>>      default is 'ascii', but if you're willing to experiment, you can
>>      change this."""
>>      encoding = "ascii" # Default value set by _PyUnicode_Init()
>>      if 0:
>>          # Enable to support locale aware default string encodings.
>>          import locale
>>          loc = locale.getdefaultlocale()
>>          if loc[1]:
>>              encoding = loc[1]
>> -------------------------------
>>
>>
>>
>> Change the "if 0:" to "if 1:" and see if that doesn't fix the problem.
>>
>>
>>
>> --
>> ----------------------------------------------------------------------------
>> Tim Daneliuk     tundra at tundraware.com
>> PGP Key:         http://www.tundraware.com/PGP/
> 


-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From horpner at yahoo.com  Tue Nov 21 08:01:39 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 21 Nov 2006 14:01:39 +0100
Subject: Parsing/Splitting Line
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
Message-ID: <slrnem5u8l.1b4.horpner@FIAD06.norwich.edu>

On 2006-11-21, acatejr at gmail.com <acatejr at gmail.com> wrote:
> I have a text file and each line is a list of values.  The
> values are not delimited, but every four characters is a value.
> How do I get python to split this kind of data?  Thanks.

Check out _Text Processing in Python_, Chapter 2, "PROBLEM:
Column statistics for delimited or flat-record files".
URL:http://gnosis.cx/TPiP/

-- 
Neil Cerutti


From gagsl-py at yahoo.com.ar  Mon Nov 13 21:29:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 23:29:36 -0300
Subject: __cmp__ between dissimilar objects
In-Reply-To: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061113231425.039e1120@yahoo.com.ar>

At Monday 13/11/2006 21:33, insyte at gmail.com wrote:

>I have a class that has, as an attribute, an instance of
>datetime.datetime().  I would like to be able to compare my class
>directly to instances of datetime.datetime in addition to other
>instances of my class.  The value used for the comparison in either
>case should be the value of the datetime attribute of the class:
>
>from datetime import datetime
>
>class GeneralizedTime(object):
>     def __init__(self, time=None):
>         if time is None:
>             self.datetime = datetime.now()
>     def __cmp__(self, x):
>         if isinstance(x, GeneralizedTime):
>             return cmp(self.datetime, x.datetime)
>         if isinstance(x, datetime):
>             return cmp(self.datetime, x)
>
>
> >>> import datetime
> >>>
> >>> GeneralizedTime() > datetime.now()
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>TypeError: can't compare datetime.datetime to GeneralizedTime

This appears to be some braindead code in the datetime class.
You have to provide all the "rich-comparison" methods, and even then, 
will never work when a datetime instance is at the left of the comparison.

     def __lt__(self, other): return self.__cmp__(other)<0
     def __le__(self, other): return self.__cmp__(other)<=0
     def __gt__(self, other): return self.__cmp__(other)>0
     def __ge__(self, other): return self.__cmp__(other)>=0
     def __eq__(self, other): return self.__cmp__(other)==0
     def __ne__(self, other): return self.__cmp__(other)!=0

When the rich comparison methods raise NotImplementedError, the 
comparison logic inside the interpreter tries reversing the operands. 
But datetime objects don't do that, they raise TypeError, thus 
preventing the operand reversing. So any comparison with datetime on 
the left and your GeneralizedTime on the right side will fail.
If nobody has an explanation on *why* datetime does this, I'd say it's a bug.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From robert.kern at gmail.com  Tue Nov 28 00:59:16 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 27 Nov 2006 23:59:16 -0600
Subject: splitting a long string into a list
In-Reply-To: <1164692082.272978.66720@14g2000cws.googlegroups.com>
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
Message-ID: <ekgj85$ce3$1@sea.gmane.org>

ronrsr wrote:
> I have a single long string - I'd like to split it into a list of
> unique keywords. Sadly, the database wasn't designed to do this, so I
> must do this in Python - I'm having some trouble using the .split()
> function, it doesn't seem to do what I want it to - any ideas?

Did you follow the recommendations given to you the last time you asked this
question? What did you try? What results do you want to get?

-- 
Robert Kern

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



From p.lavarre at ieee.org  Mon Nov 20 14:20:37 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 20 Nov 2006 11:20:37 -0800
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
	<mailman.8.1163336252.32031.python-list@python.org>
	<1163579122.362383.203240@k70g2000cwa.googlegroups.com>
	<mailman.187.1163579886.32031.python-list@python.org>
Message-ID: <1164050436.816237.63130@b28g2000cwb.googlegroups.com>

> but the os module isn't very far away

I see Python defines some evals that apparently don't import os, such
as:

int('0x100'[2:], 0x10)
float('1.23e+4')
binascii.unhexlify('4142')

Does Python also define an eval that doesn't import os for literal
string args?

For example, suppose someone gives me source strings like
repr('\a\r\n') when I need byte strings like '\a\r\n'.
http://docs.python.org/ref/strings.html lists the escapes that need
eval'ling, especially the comparatively heavy and Python-specific \N{}
escape.

Is then a "slow and dangerous" eval my only reasonably concise choice?



From fredrik at pythonware.com  Mon Nov 20 02:42:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 08:42:35 +0100
Subject: ElementSOAP and <soap:Header>
In-Reply-To: <1164007864.239490.20810@k70g2000cwa.googlegroups.com>
References: <1164007864.239490.20810@k70g2000cwa.googlegroups.com>
Message-ID: <ejrm9b$s8e$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:

> 2) If one wanted to make use of ElementSOAP, and one wanted it to
> produce a SOAP message that includes a <soap:Header> would the general
> outline be:
>   a) use ElementTree to create and populate the <soap:Header> element
>   b) insert the <soap:Header> element as a subelement of envelope in
> the SoapService class

make sure you have the 0.5 release, call SoapHeader to create a header 
element, populate it with whatever you want, and pass it to "call" using 
the header= keyword argument

     header = SoapHeader()
     ... populate header ...
     service.call(action, request, header=header)

> I think much of my confusion stems from my lack of understanding of
> SOAP.  As I understand it, <soap:Header> is an optional part of a SOAP
> message.  I'm pretty sure that 'optional' at a minimum means that not
> all SOAP messages must contatin a <soap:Header>.  But does 'optional'
> mean more than that?  Does it mean that one could get by without ever
> having to produce a SOAP message that includes a <soap:Header>?  Or,
> are there some webservices where if one didn't include a <soap:Header>
> in the SOAP message, the webservice would not work?

optional means "it's up to the server to decide if it wants one".

</F>



From robert.kern at gmail.com  Sun Nov 12 18:03:36 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 12 Nov 2006 17:03:36 -0600
Subject: numpy/scipy: correlation
In-Reply-To: <1163345525.904165.87090@e3g2000cwe.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>	<mailman.2114.1163286261.11739.python-list@python.org>
	<1163345525.904165.87090@e3g2000cwe.googlegroups.com>
Message-ID: <ej898h$mp1$1@sea.gmane.org>

sturlamolden wrote:
> Robert Kern wrote:
> 
>> The difference between the two models is that the first places no restrictions
>> on the distribution of x. The second does; both the x and y marginal
>> distributions need to be normal. Under the first model, the correlation
>> coefficient has no meaning.
> 
> That is not correct. The correlation coefficient is meaningful in both
> models, but must be interpreted differently. However, in both cases a
> correlation coefficient of 1 or -1 indicates an exact linear
> relationship between x and y.
> 
> Under the first model ("linear regression"), the squared correlation
> coefficient is the "explained variance", i.e. the the proportion of y's
> variance accounted for by the model y = m*x  + o.

Point.

-- 
Robert Kern

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



From korvus at gmail.com  Thu Nov 16 19:21:34 2006
From: korvus at gmail.com (Jeff  Poole)
Date: 16 Nov 2006 16:21:34 -0800
Subject: cPickle problems
Message-ID: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>

This is going to be a pretty vague message because it involves a large
block of code I'd rather avoid posting.  Basically, I've been pickling
a dictionary of instances of a class I've created (which contains
references to other instances of other classes).  At some point in the
last few weeks, pickling has stopped working with the following error:

Traceback (most recent call last):
  File "./generateTools.py", line 50, in ?
    proj.findVHDLfiles("vhd")
  File "/cygdrive/c/fpga/tools/FPGAProject.py", line 630, in
findVHDLfiles
    cpickle.dump(filenameToClassDic,pickleFile,PICKLE_FILE_PROTOCOL)
  File "/usr/lib/python2.4/copy_reg.py", line 83, in _reduce_ex
    dict = getstate()
TypeError: 'str' object is not callable


Does anyone have any idea why this might be failing in this way?  It's
driving me crazy.  If need be I can probably provide the code to the
class, though it's about 1000 lines, most of which is PyParsing code.
I appreciate any help you guys can provide.


Jeff



From pavlovevidence at gmail.com  Sun Nov 19 19:23:08 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 19 Nov 2006 16:23:08 -0800
Subject: a few extensions for the itertools
In-Reply-To: <u548h.601$Gk5.399@tornado.texas.rr.com>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<u548h.601$Gk5.399@tornado.texas.rr.com>
Message-ID: <1163982188.673884.255770@b28g2000cwb.googlegroups.com>


Paul McGuire wrote:
> "Mathias Panzenboeck" <e0427417 at student.tuwien.ac.at> wrote in message
> news:4560bfb0$0$10578$3b214f66 at tunews.univie.ac.at...
> >I wrote a few functions which IMHO are missing in python(s itertools).
> >
> > You can download them here:
> > http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
> >
> > A short description to all the functions:
> >
> Just a couple of questions:
>
> > iproduct(iterable, start=0) -> value
> > Returns the product of the elements of a iterable
> > times the value of parameter 'start'.  When the
> > iterable is empty, returns start.
> >
> Wouldn't 1 be a better default value for start?

I concur; start should default to 1.


> > forall(predicate, iterable, default=True) -> bool
> > Returns True, when for all elements x in iterable
> > predicate(x) is True. When the iterable is empty,
> > returns default.
> >
> > forany(predicate, iterable, default=False) -> bool
> > Returns True, when for any element x in iterable
> > predicate(x) is True. When the iterable is empty,
> > returns default.
> >
> How are these different from all and any in Python 2.5?

1. These functions apply a predicate to the items.  It's simple enough
to do with any/all and a genexp, but by the same argument, it's simple
enough to do imap and ifilter with a plain genexp.
2. They have default values.  Default values for any and all don't make
sense, and I don't think they make sense here, either.  All of nothing
is always True; any of nothing is always False.


Carl Banks



From mail at microcorp.co.za  Tue Nov 14 00:06:17 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Nov 2006 07:06:17 +0200
Subject: Data structure for ordered sequence
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com><1163411468.025376.171210@k70g2000cwa.googlegroups.com>
	<ej9fsq$i3l$1@sea.gmane.org>
Message-ID: <02d701c707c2$80d8f320$03000080@hendrik>

"Fredrik Lundh" <fredrik at pythonware.com> wrote:


> Eric_Dexter at msn.com wrote:
> 
>  > unless this is homework because the pil people will not let
> > you distribute pils.
> 
> I'm not sure I can parse this sentence fragment.  What do you mean?

oh come on! - you of all people should know that "pils" means mushroom...

- Hendrik



From __peter__ at web.de  Tue Nov 28 04:50:26 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 10:50:26 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
Message-ID: <ekh0nm$9sh$00$1@news.t-online.com>

Leo Kislov wrote:

> 
> Peter Otten wrote:
>> Peter Otten wrote:
>>
>> > HYRY wrote:
>> >
>> >> I want to join two mono wave file to a stereo wave file by only using
>> >> the default python module.
>> >> Here is my program, but it is much slower than the C version, so how
>> >> can I increase the speed?
>> >> I think the problem is at line #1, #2, #3.
>> >
>> >> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
>> >
>> > ITEMSIZE = 2
>> > size = ITEMSIZE*(len(larray) + len(rarray))
>> > oarray = array.array("h")
>> > oarray.fromstring("\0" * size)
>> >
>> > may be a bit faster.
>>
>> Confirmed:
>>
>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
>> array("h"); a.fromstring("\0"*(2*N))'
>> 100 loops, best of 3: 9.68 msec per loop
>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
>> array("h",
>> [0]*N);'
>> 10 loops, best of 3: 199 msec per loop
> 
> Funny thing is that using huge temporary string is faster that
> multiplying small array:
> 
> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
> =array('h'); a.fromstring('\0'*(2*N))"
> 100 loops, best of 3: 9.57 msec per loop
> 
> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
> = array('h','\0\0'); a*N"
> 10 loops, best of 3: 28.4 msec per loop
> 
> Perhaps if array multiplication was as smart as string multiplication
> then array multiplication version would be the fastest.

That will not suffice:

$ python2.5 -m timeit -s'from array import array; from itertools import
repeat; N = 10**6; init = [0]*N' 'array("h", init)'
10 loops, best of 3: 130 msec per loop

$ python2.5 -m timeit -s'from array import array; from itertools import
repeat; N = 10**6; init = "\n"*(2*N)' 'array("h").fromstring(init)'
100 loops, best of 3: 5 msec per loop

A big chunk of the time is probably consumed by "casting" the list items.
Perhaps an array.fill(value, repeat) method would be useful.

Peter



From sjmachin at lexicon.net  Wed Nov 29 17:20:30 2006
From: sjmachin at lexicon.net (John Machin)
Date: 29 Nov 2006 14:20:30 -0800
Subject: ensuring valid latin-1
References: <1164836862.381040.298030@l12g2000cwl.googlegroups.com>
Message-ID: <1164838830.235564.29700@n67g2000cwd.googlegroups.com>

Chris Curvey wrote:
> Hey all,
>
> I'm trying to write something that will "fail fast" if one of my users
> gives me non-latin-1 characters.  So I tried this:
>
> >>> testString = "\x80"
> >>> foo = unicode(testString, "latin-1")
> >>> foo
> u'\x80'
>
> I would have thought that that should have raised an error, because
> \x80 is not a valid character in latin-1 (according to what I can
> find).  Is this the expected behavior, or am I missing something?

Depends on what you call 'latin-1'. The standard ISO 8859-1 defined
only displayable characters. If you used that definition, even the
basic ASCII carriage return, line feed and tab would raise an error.
However, according to wikipedia:

"""In 1992, the IANA registered the character map ISO_8859-1:1987, more
commonly known by its preferred MIME name of ISO-8859-1 (note the extra
hyphen over ISO 8859-1), a superset of ISO 8859-1, for use on the
Internet. This map assigns the C0 and C1 control characters to the code
values 00-1F, 7F, and 80-9F. It thus provides for 256 characters
via every possible 8-bit value."""

'latin-1' and 'iso-8859-1' are the same encoding.

If you articulate your definition of "valid latin-1", we should be able
to help you with some Python code to check it for you.

>
> I'm on Windows, but I have explicitly set the character set to be
> latin-1 in sitecustomize.py

Why??

Don't do that. That's a self-inflicted double whammy.
(1) You should *not* assume that all the legacy str data your machine
will ever process is in only one encoding.
(2) On a Windows machine, your legacy data is extremely likely to be
encoded in a Microsoft-developed encoding (like cp1252), not latin-1.

>
> >>> import sys
> >>> sys.getdefaultencoding()
> 'latin-1'

HTH,
John



From robert.kern at gmail.com  Thu Nov 16 18:47:09 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 16 Nov 2006 17:47:09 -0600
Subject: About alternatives to Matlab
In-Reply-To: <1163720268.611923.3180@e3g2000cwe.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
Message-ID: <ejitaa$pnf$1@sea.gmane.org>

Matimus wrote:
> There is also Scilab. I've only used it a tiny bit but for the task it
> worked well. I do know that it has a somewhat restrictive license. It
> is open source, but you aren't allowed to modify and redistribute the
> source. I get the feeling that some people avoid Scilab but I'm not
> sure why. If anybody knows the reason I'd be happy to hear it.

I think you just stated it.

-- 
Robert Kern

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



From walterbyrd at iname.com  Wed Nov 22 09:35:56 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 22 Nov 2006 06:35:56 -0800
Subject: Trying to understand Python objects
In-Reply-To: <45643a6f$0$7761$426a74cc@news.free.fr>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<45643a6f$0$7761$426a74cc@news.free.fr>
Message-ID: <1164206156.302934.183510@b28g2000cwb.googlegroups.com>

Thanks everybody. I will sort all of this out, but right now my head is
spinning.

Is there some book, or other reference, that explains of this? I was
thinking about "Python for Dummies." The "Think like a Computer
Scientist" book, and "Dive into Python" book don't seem to explain
Python's object model clearly enough for me.



From john106henry at hotmail.com  Tue Nov  7 12:18:16 2006
From: john106henry at hotmail.com (John Henry)
Date: 7 Nov 2006 09:18:16 -0800
Subject: shutil: permission denied errors on windows
In-Reply-To: <af162$45505aea$544abc47$10376@news.hispeed.ch>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
	<1162858987.931532.61530@h48g2000cwc.googlegroups.com>
	<af162$45505aea$544abc47$10376@news.hispeed.ch>
Message-ID: <1162919896.527769.38750@m73g2000cwd.googlegroups.com>

Okay, it's always good that strange things are repeatable and happens
with simple scripts.

Are you saying "a" is a folder?  So, the failure is only with copying
folder?  Not individual file?



Antoine De Groote wrote:
> Yes it's strange, I never had the problem before, either. It seems now
> to be only the case for folders. A very simple
>
> shutil.copy('a', 'b')
>
> already fails with the error message.
>
> I reinstalled Python, but that didn't change anything...
>
> Regards,
> antoine
>
> John Henry wrote:
> > I use the copy function a lot and never have problem.  I suggest that
> > you write a no brainer standalone test code and if it still fails
> > there, then you have a problem with your installation.
> >
> > Antoine De Groote wrote:
> >> Google tells quite some things about it, but none of them are satisfactory.
> >>
> >> I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13]
> >> Permission denied all the time, for the source files. It seems that this
> >> is the case for all my files. But what I don't understand is that
> >> yesterday it still worked. I didn't change anything on my system though
> >> (at least not that I am aware of). I restarted the computer several
> >> times to see if that helped, but it didn't. Also I can't find a process
> >> that would be using the files...
> >>
> >> Has anybody experienced this problem before, or have a solution?
> >>
> >> Kind regards,
> >> antoine
> >>
> >> Here's the code that throws the errors
> >>
> >> [...]
> >> for l in files:
> >>              from_file = os.path.join(dir, l)
> >>              to_file = from_file.replace(tree_top, backup_dir)
> >>              try:
> >>                  if not os.path.exists(to_file):
> >>                      log('Copying new      %s' % from_file)
> >>                      counter_new += 1
> >>                      shutil.copy2(from_file, to_file)
> >>                  elif int(os.path.getmtime(from_file)) >
> >> int(os.path.getmtime(to_file)):
> >>                      log('Copying modified %s' % from_file)
> >>                      counter_mod += 1
> >>                      shutil.copy2(from_file, to_file)
> >>                  elif os.path.getsize(from_file) > os.path.getsize(to_file):
> >>                      log('Sizes differ, but not rest: Copying %s' %
> >> from_file)
> >>                      counter_special += 1
> >>                      shutil.copy2(from_file, to_file)
> >>                  elif os.path.getsize(from_file) < os.path.getsize(to_file):
> >>                      log('Orig file smaller than backup file: Copying
> >> %s' % from_file)
> >>                      counter_special += 1
> >>                      shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
> >>                      shutil.copy2(from_file, to_file)
> >>                  else:
> >>                      #log('not treated: %s' % l)
> >>                      pass
> >>
> >>              except (OSError, IOError), e:
> >>                  not_accessible += 1
> >>                  print e
> >> [...]
> >



From juho.schultz at pp.inet.fi  Sun Nov 26 14:53:56 2006
From: juho.schultz at pp.inet.fi (Juho Schultz)
Date: 26 Nov 2006 11:53:56 -0800
Subject: question about function not executing
In-Reply-To: <mailman.742.1164568130.32031.python-list@python.org>
References: <mailman.742.1164568130.32031.python-list@python.org>
Message-ID: <1164570836.134762.271770@45g2000cws.googlegroups.com>

Hint:

Posting only the piece of code causing the problem will give you more
answers...

Ara Kooser wrote:
> Hello all,
>
>   I hope I am posting this correctly. I am running Python 2.4.2 on
> Slackware 11.0 using IDLE. I am in the process of learning python so I
> am writing a text adventure game using functions and global variables
> only. I know there is a better way to do this but that is for later.
>
>    When I run the python program it works fine until I try to go west
> from my inital start room. I get the room description but no raw_input
> prompt. I just get dumped back to >>> in the python shell. I think I
> am missing something simple. I pasted in the code below. I am using
> gmail so I hope the formatting stays. If not I can send the .py as an
> attachment if needed. Thanks.
>
> Ara
>

<clip>

Giving the command 'w', you call meadow1()

>         elif prompt_o1 == "w":
>             meadow1()

> def meadow1():
>
<clip>
>     print
>     prompt_meadow1

So you end up here, the meadow1() function returns to the
except ValueError:
and ends then as expected.

>
> def meadow1_desc():
>     prompt_meadow1

Same problem would occur in here.

I guess you want to call this:

> def prompt_meadow1():
>
>     prompt_m1 = raw_input("Type a command: ").lower()

So write
prompt_meadow1()
instead of
prompt_meadow1

(experiment in python shell and you see the difference.
>>> raw_input
<built-in function raw_input>
>>> raw_input()
now python waits for your input

For the player, create a class.

class player(object):

    def __init__(self):
         self.poisoned = False

    def take_poison(self):
         print 'You are poisoned'
         self.poisoned = True
         # effects of poison in here:
         # take some hitpoints
         # maybe reduce some stats
         # and so on...

# now, generate a player instance
p = player() # calls __init__
# poison the player
p.take_poison()

-- 
Juho Schultz



From msherman77 at yahoo.com  Wed Nov  1 09:15:48 2006
From: msherman77 at yahoo.com (Michael S)
Date: Wed, 1 Nov 2006 09:15:48 -0500 (EST)
Subject: report progress from C function
In-Reply-To: <eia9nq$gq8$1@sea.gmane.org>
Message-ID: <20061101141548.90357.qmail@web88313.mail.re4.yahoo.com>

What if it doesn't do exactly what you need to? How do
you debug through that code?

--- Fredrik Lundh <fredrik at pythonware.com> wrote:

> Michael S wrote:
> 
> > My assembler is very basic, so it wouldn't help,
> while
> > my C is OK, well sort of.
> > 
> > BTW. Neither have I looked at the machine code
> that
> > the assembler produces. 
> 
> so why does the output from Pyrex worry you?  it's a
> compiler, after all.
> 
> </F>
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From mail at microcorp.co.za  Tue Nov  7 01:10:47 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 7 Nov 2006 08:10:47 +0200
Subject: Unicode/ascii encoding nightmare
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com><1162846153.137536.116970@b28g2000cwb.googlegroups.com><1162853677.881233.76940@m7g2000cwm.googlegroups.com>
	<1162854065.932910.99240@k70g2000cwa.googlegroups.com>
Message-ID: <01ee01c70235$1672e820$03000080@hendrik>

"John Machin" <sjmachin at lexicon.net> wrote:

8<---------------------------------------

> I strongly suggest that you read the docs *FIRST*, and don't "tinker"
> at all.
>
> HTH,
> John

 This is *good* advice - its unlikely to be followed though, as the OP is prolly
just like most of us - you unpack the stuff out of the box and start assembling
it, and only towards the end, when it wont fit together, do you read the manual
to see where you went wrong...

- Hendrik



From beliavsky at aol.com  Sun Nov 12 20:18:56 2006
From: beliavsky at aol.com (Beliavsky)
Date: 12 Nov 2006 17:18:56 -0800
Subject: article on Python 2.5 features
Message-ID: <1163380736.242639.181230@i42g2000cwa.googlegroups.com>

A Parade of New Features Debuts in Python 2.5
by Gigi Sayfan
"Python 2.5 still has the smell of fresh paint but it's the perfect
time to drill down on the most important new features in this
comprehensive release. Read on for detailed explanations and examples
of exception handling, resource management, conditional expressions,
and more."

The full article is at
http://www.devx.com/webdev/Article/33005/0/page/1 .



From matthew at agrip.org.uk  Sun Nov 26 06:29:19 2006
From: matthew at agrip.org.uk (Matthew Tylee Atkinson)
Date: Sun, 26 Nov 2006 11:29:19 +0000 (UTC)
Subject: Persistent Threads & Synchronisation
Message-ID: <ekbtqe$74s$2@news.freedom2surf.net>

I appear to be having some problems with the isAlive() method of
detecting if a thread is alive/active/running or not.  I'd be grateful
for any advice.

I have a visualisation program (which uses PyGame Extended [1]) that
presents content to the user and is meant to download the next batch of
content whilst the current one is being displayed.  To achieve this, I
created a thread to perform the downloading in the background (a class
based on threading.Thread).

They way I want it to work is this:  The downloading thread, when
spawned, stays alive for the duration of the program.  Occasionally the
main program will call a function in it to download the data and save it
as files on disk.  Then, these files are loaded by the main thread.
When this has happened, the main thread calls another function in the
download thread to delete the temporary files.  The same thing happens
next time a download is needed, when the user is looking at some other
content.

My problem is this: the downloading thread only seems to execute code
in a separate thread as long as the run() function (called by the
start() function) is running.  This is as per the documentation, of
course.  I am performing the download in the run() function, but the
file cleanup is still done with a separate call.  This actually does
work, after the download is over, and run() has terminated, but I
believe it isn't happening in a separate thread anymore (as previously I
made a mistake and called run() directly, instead of start() and it
blocked the main program).

I have been using join() to wait until the download is complete at the
point in the main program where it is absolutely necessary for the
download to have finished.  I'm trying to use the following code to
restart the downloading thread when I next need to use it:

    if not self.preview_thread.isAlive():
        self.preview_thread.start()

Unfortunately, isAlive() sometimes returns False when the thread is
actually still running.  This means that my code crashes out, on the
assertion in threading.Thread that self.__started is False.  The
documentation [2] explains that the issue of threads being ``alive''
has ``intentionally been left vague'', which doesn't inspire confidence
:-S.

To work around this problem, I was thinking of doing this:

    class PreviewThread(threading.Thread):
        . . .
        def run(self):
            self.download_data()
            while not self.temp_files_cleaned:
                pass
            return
        . . .
        def cleanup(self):
            . . .
            self.temp_files_cleaned = True

This should allow the thread to remain alive until after the download
*and* cleanup have been completed, so that I can be sure it's safe to
restart it when I next need to download more data.

My ultimate question: is this the right way to do things?  I don't like
the idea of making a loop such as that in the proposed run() function
above, it seems inefficient.  I am also concerned that it won't let me
call other functions in the thread, perhaps.

I did wonder about using a Condition, but that seems to be more suited
for synchronising between threads, which isn't really the issue here
(and thus it seems like overkill for solving the problem of replacing
that loop with something more efficient, though could be a possibility,
I suppose).

It seems I'm missing something big and possibly obvious about how to
make threads persistent.  I would like to know ``the right way'' to do
it and would really appreciate some advice on the subject.

Many thanks in advance!


[1] http://codereactor.net/projects/pygext/
[2] http://docs.python.org/lib/thread-objects.html
-- 
Matthew Tylee Atkinson <matthew at agrip.org.uk>


From nick at craig-wood.com  Thu Nov  9 09:30:06 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 09 Nov 2006 08:30:06 -0600
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
Message-ID: <slrnel6dec.360.nick@irishsea.home.craig-wood.com>

Christophe <chris.cavalaria at free.fr> wrote:
>  Nick Craig-Wood a ?crit :
> > There is also PyQT which we wrote off as we wanted to write commercial
> > applications too.  As it happens we have a commercial QT licence, but
> > we decided we didn't want to have to incurr the additional expense of
> > renewing it.
>  Note: Nothing in the GPL prevents you from writting commecial
>  software ;)

A completely valid point!

s/commercial applications/closed source applications/ would be more
accurate.

However, in this case, our customer didn't want the source code
released as it contained some of their confidential stuff.

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


From jtr at ofb.net  Sun Nov 12 19:46:26 2006
From: jtr at ofb.net (John Reese)
Date: Mon, 13 Nov 2006 00:46:26 +0000 (UTC)
Subject: Python 3000 idea -- + on iterables -> itertools.chain
Message-ID: <slrnelfg32.6d3.jtr@ofb.net>

It seems like it would be clear and mostly backwards compatible if the
+ operator on any iterables created a new iterable that iterated
throught first its left operand and then its right, in the style of
itertools.chain.  This would allow summation of generator expressions,
among other things, to have the obvious meaning.

Any thoughts?  Has this been discussed before?  I didn't see it
mentioned in PEP 3100.

The exception to the compatibility argument is of course those
iterables for which + is already defined, like tuples and lists, for
that set of code that assumes that the result is of that same type,
explicitly or implicitly by calling len or indexing or whathaveyou.
In those cases, you could call tuple or list on the result.  There are
any number of other things in Python 3000 switching from lists to
one-at-a-time iterators, like dict.items(), so presumably this form of
incompatibility isn't a showstopper.


From ronrsr at gmail.com  Sun Nov 12 19:32:39 2006
From: ronrsr at gmail.com (ronrsr)
Date: 12 Nov 2006 16:32:39 -0800
Subject: format requires a mapping?
Message-ID: <1163377959.646963.94900@e3g2000cwe.googlegroups.com>

what is python trying to tell me here?  does it have to do with
formatting the string.

Keywords and Zinger are fields in my database.

print """<tr>
    <td class="padplace" width="120">Keywords</td>
    <td class="padplace" idth="660">Zinger</td><td>





TypeError:  format requires a mapping




thanks much in advance, 

-rsr-



From researchbase at gmail.com  Sat Nov 18 12:44:09 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Sat, 18 Nov 2006 23:14:09 +0530
Subject: please help me choose a proper gui library.
Message-ID: <f81479dd0611180944h6916db1bs47ec2e05b4a2a399@mail.gmail.com>

hello all.
after finishing a project in record time using python we have taken up
one more project.
this time however, we need to do a gui based project  which will run
on windows xp and 2000.
now My question is which gui toolkit should I choose?
I had initially raised some doubt about accessibility (which is very
important for me ), and with the answers and all the pointers given, I
know that wxpython is quite out of question.
now my next choice is PyQT.
can some one give me information on the following points?
1.  do I first need to install the pure c++ based QT library both on
the developer machine and the client's user machine?
2.  I need an executable binary installer for windows xp.  is it
available for python24?  I searched but found one for python25.  else
kindly guide me what should I do to install the source.  I read the
documentation but did not get the clear idea whether I must have qt
installed first or not.  if yes are there binary installers of PYQT
which can also install qt?
3. if I need to upgrate to python25, should it be considered safe?
4.  I don't want to use the qt IDE and this point is nothing to do
with qt, I need a good windows based python editor.
5.  if I am supposed to also distrubute qt with PYQT, how do I plan
the deployment of my ready software?
thanking all.
Krishnakant.


From gerard5609 at yahoo.fr  Tue Nov  7 19:14:26 2006
From: gerard5609 at yahoo.fr (gerard5609 at yahoo.fr)
Date: 7 Nov 2006 16:14:26 -0800
Subject: ctypes, python 2.5, WinFunctionType and _as_parameter_
In-Reply-To: <mailman.1852.1162931966.11739.python-list@python.org>
References: <1162854805.644830.138280@m7g2000cwm.googlegroups.com>
	<mailman.1852.1162931966.11739.python-list@python.org>
Message-ID: <1162944866.256369.326200@m73g2000cwd.googlegroups.com>


Thomas Heller a ?crit :
 
> cast(function, c_void_p).value

Yes, it works. Many thanks !

Gerard



From jack at abc.net  Sat Nov 18 18:36:46 2006
From: jack at abc.net (Michael Press)
Date: Sat, 18 Nov 2006 23:36:46 GMT
Subject: syntax error in sum(). Please explicate.
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
	<1163889196.135008.126970@h54g2000cwb.googlegroups.com>
Message-ID: <jack-70B2B1.15364718112006@newsclstr02.news.prodigy.com>

In article 
<1163889196.135008.126970 at h54g2000cwb.googlegroups.com>
,
 "Matt Moriarity" <matt.moriarity at gmail.com> wrote:

> try surrounding your sum argument in brackets:
> 
> sum([phi(x // ps[i+1], i) for i in range(a)])
> 
> instead of:
> 
> sum(phi(x // ps[i+1], i) for i in range(a))

Thank you. That makes it work.

-- 
Michael Press


From bill_maxwell_notMyRealAddress at notreal.net  Wed Nov 15 23:58:59 2006
From: bill_maxwell_notMyRealAddress at notreal.net (Bill Maxwell)
Date: Wed, 15 Nov 2006 23:58:59 -0500
Subject: Python deployment options.
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162986129.233443.268730@h54g2000cwb.googlegroups.com>
Message-ID: <errnl2p160ug0idm1mcd114meee0vvggt3@4ax.com>

On 8 Nov 2006 03:42:09 -0800, "king kikapu" <aboudouvas at panafonet.gr>
wrote:

>
>I see...So, if these are the only options, the only "safe" bet is to
>install the language on the machine (beeing Win, Linux or Mac)
>and execute the .py files, right ??


No, those are not the only options.  

Check out PyInstaller:  http://pyinstaller.python-hosting.com/


I haven't used the latest versions.  But, I've used the old Gordon
McMillan package that PyInstaller is based on, and had good success.




From b.prashant at gmail.com  Thu Nov 23 11:25:30 2006
From: b.prashant at gmail.com (prashant)
Date: 23 Nov 2006 08:25:30 -0800
Subject: ImportError: No module named getopt
In-Reply-To: <mailman.648.1164297311.32031.python-list@python.org>
References: <1164294464.445025.326640@f16g2000cwb.googlegroups.com>
	<1164296497.433163.226290@j72g2000cwa.googlegroups.com>
	<mailman.648.1164297311.32031.python-list@python.org>
Message-ID: <1164299129.964220.101420@j44g2000cwa.googlegroups.com>

thanks a lot that helped...


Fredrik Lundh wrote:
> "prashant" wrote:
>
> > I am actually using Cygwin to run a python script.
> > I have python 2.5 installed. But when i ran the command mentioned by
> > you... I see that it is looking in the wrong directories... how can i
> > change these look up directories?
>
> is PYTHONHOME perhaps set to the wrong thing?
>
> if not, you can point it to the root of your Python installation.  use "python -h"
> for more alternatives.
> 
> </F>



From thomas.weholt at gmail.com  Mon Nov  6 14:50:50 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 6 Nov 2006 11:50:50 -0800
Subject: Unicode/ascii encoding nightmare
Message-ID: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>

I'm getting really annoyed with python in regards to
unicode/ascii-encoding problems.

The string below is the encoding of the norwegian word "f?dselsdag".

>>> s = 'f\xc3\x83\xc2\xb8dselsdag'

I stored the string as "f?dselsdag" but somewhere in my code it got
translated into the mess above and I cannot get the original string
back. It cannot be printed in the console or written a plain text-file.
I've tried to convert it using

>>> s.encode('iso-8859-1')
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
ordinal not in range(128)

>>> s.encode('utf-8')
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
ordinal not in range(128)

And nothing helps. I cannot remember hacing these problems in earlier
versions of python and it's really annoying, even if it's my own fault
somehow, handling of normal characters like this shouldn't cause this
much hassle. Searching google for "codec can't decode byte" and
UnicodeDecodeError etc. produces a bunch of hits so it's obvious I'm
not alone.

Any hints?



From tejovathi.p at gmail.com  Wed Nov  1 23:04:46 2006
From: tejovathi.p at gmail.com (Teja)
Date: 1 Nov 2006 20:04:46 -0800
Subject: Regular Expression for a string
Message-ID: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>

HI all,

I need to write a regular experssion for a string which satisfies the
following a criteria :

1) it should start with an alphabet
2) it can contain alphabets/digits/_ from second character
3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional

 can any one please help me out.... pls....


Teja.P



From p.lavarre at ieee.org  Mon Nov 20 16:44:10 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 20 Nov 2006 13:44:10 -0800
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
	<mailman.8.1163336252.32031.python-list@python.org>
	<1163579122.362383.203240@k70g2000cwa.googlegroups.com>
	<mailman.187.1163579886.32031.python-list@python.org>
	<1164050436.816237.63130@b28g2000cwb.googlegroups.com>
	<mailman.515.1164056087.32031.python-list@python.org>
Message-ID: <1164059050.436043.157740@k70g2000cwa.googlegroups.com>

> > > int('0x100', 0x10) ...
> >
> > ... evals that apparently don't import os, such as ...
> >
> > int('0x100'[2:], 0x10)
> > float('1.23e+4')
> > binascii.unhexlify('4142')
> >
> > ... for literal string args?
> > http://docs.python.org/ref/strings.html
>
> http://docs.python.org/lib/standard-encodings.html
> a = r'hello\nthere'
> print a.decode('string_escape')

Bingo, thank you:

>>> binascii.hexlify(repr('\xA3')[1:-1].decode('string_escape'))
'a3'
>>> binascii.hexlify(repr(u'\u00A3')[2:-1].decode('unicode_escape').encode('UTF-8'))
'c2a3'
>>>



From horpner at yahoo.com  Thu Nov 30 14:23:17 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Nov 2006 20:23:17 +0100
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
Message-ID: <slrnemubvi.194.horpner@FIAD06.norwich.edu>

On 2006-11-30, John Henry <john106henry at hotmail.com> wrote:
> If I have a list of say, 10 elements and I need to slice it into
> irregular size list, I would have to create a bunch of temporary
> variables and then regroup them afterwords, like:
>
> # Just for illustration. Alist can be any existing 10 element list
> a_list=("",)*10
> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> alist=(a,)
> blist=(b,)
> clist=(c1,c2,c3)
> dlist=(d2,d3,d4,d5)
>
> That obviously work but do I *really* have to do that?

Please post actual code we can run, rather than text that is
almost, but not quite, entirely unlike Python code.

> BTW: I know you can do:
> alist=a_list[0]
> blist=a_list[1]

Note that alist and blist are not necessarily lists, as you did
not use slice notation.

> clist=a_list[2:5]
> dlist=a_list[5:]
>
> but I don't see that it's any better.

I think it looks much better, personally.

If you are iterating through that sequence of slices a lot,
consider using a generator that yields the sequence.

  >>> def parts(items):
  ...   yield items[0:1]
  ...   yield items[1:2]
  ...   yield items[2:5]
  ...   yield items[5:]
 
  >>> for seq in parts(range(10)):
  ...   print seq
  [0]
  [1]
  [2, 3, 4]
  [5, 6, 7, 8, 9]
 
-- 
Neil Cerutti
I guess there are some operas I can tolerate and Italian isn't one of them.
--Music Lit Essay


From obnmfrbeqzgkst at mailinator.com  Wed Nov 29 11:55:04 2006
From: obnmfrbeqzgkst at mailinator.com (obnmfrbeqzgkst at mailinator.com)
Date: 29 Nov 2006 08:55:04 -0800
Subject: Processing Solid Edge objects
In-Reply-To: <1164806971.729422.87170@14g2000cws.googlegroups.com>
References: <1164803264.351803.204720@h54g2000cwb.googlegroups.com>
	<1164804107.162420.99730@j44g2000cwa.googlegroups.com>
	<1164806971.729422.87170@14g2000cws.googlegroups.com>
Message-ID: <1164819304.159268.222100@j72g2000cwa.googlegroups.com>

I've done a similar thing with Python and Catia in the past. I used
late binding to the Catia objects and I didn't have any real issues.

Things to remember:

Remove all of the "Set" statements

No need to :
  set obj = XYZ
just
  obj =XYZ

Include the brackets with all Sub calls. VB is sloppy and lets you call
subroutines without the brackets, but you have to specify them in
Python.

It can be a bit tricky passing arrays by reference from Python to a VB
subroutine. The advice I found suggested creating a small VB wrapper
which creates the array and passes it back to Python. You then call
this wrapper from Python.

Andy



From Roka100 at gmail.com  Tue Nov  7 19:47:50 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 7 Nov 2006 16:47:50 -0800
Subject: __init__ function problem
In-Reply-To: <1162929803.735097.279460@i42g2000cwa.googlegroups.com>
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
	<1162929803.735097.279460@i42g2000cwa.googlegroups.com>
Message-ID: <1162946870.504386.302530@m7g2000cwm.googlegroups.com>


> In Python, the real constructor is called __new__, >
> Carl Banks

But the code below won't invoke __new__:

[CODE]
class Test:
    def __new__(self, value):
        print "__new__",value
    def __init__(self,value):
        print "__init__",value

x = Test("testing")
[/CODE]



From bearophileHUGS at lycos.com  Wed Nov 22 19:26:53 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 16:26:53 -0800
Subject: AVL Balancing
In-Reply-To: <1164240967.634513.66200@b28g2000cwb.googlegroups.com>
References: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
	<1164158188.787394.25990@b28g2000cwb.googlegroups.com>
	<1164240291.176865.82670@l39g2000cwd.googlegroups.com>
	<1164240967.634513.66200@b28g2000cwb.googlegroups.com>
Message-ID: <1164241613.164341.327310@m7g2000cwm.googlegroups.com>

scbauer wrote:
> This is one of the errors that im getting
> Traceback (most recent call last):
>   File "<pyshell#49>", line 1, in <module>
>     t.insert(5)
>   File "/Users/stevenbauer/Desktop/AVL.py", line 68, in insert
>     stack.append(current)
> NameError: global name 'stack' is not defined

    def __init__(self):
        self.__root = None
        self.__stack=[]
        stack = self.__stack

   def addNode(self, data):
             .....
                        stack.append(current)


Some partial suggestions:
- Why do you use __? Use them only when necessary. My suggestion is to
use:
self._stack = []
- What's the purpose of stack = self.__stack ? It it does nothing
there.
- stack.append(current) can't find the stack name, because it's not
present in this scope, it's present into the __init__ only. My
suggestion is to use the instance attribute name.

You can probably fix that problem now.

Bye,
bearophile



From no-spam at no-spam-no-spam.invalid  Mon Nov 27 15:11:54 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 27 Nov 2006 21:11:54 +0100
Subject: can't get cgi values
In-Reply-To: <1164656888.974302.21120@14g2000cws.googlegroups.com>
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
	<ekfc3b$pe1$1@news.albasani.net>
	<1164656888.974302.21120@14g2000cws.googlegroups.com>
Message-ID: <ekfgqb$ja$1@news.albasani.net>

ronrsr wrote:
> Thank you, all.  that was very helpful, and did solve many of my
> problems.  I was addressing the dict with () rather than [].
> 
> I'm still having one problem, though -- extracting the keywords. NOw,
> if you check the value for Form below, you'll see there is more than
> one keyword entry.  When I do:  keywords = form["keywords"] - what sort
> of data structure do I get back?


there is another func to get multiple values - see the docs.
Basically, one can iterate all over form.list (which is not documented) to get the original order of all the fields.

Robert


> th anks          so much again.
> 
> -rsr-
> 
> 
>     if form.has_key("keywords"):
>          keywords = str(form["keywords"].value)
>      else:
>           keywords = "k"
>      fileHandle.write("here comes keywords:")
>      fileHandle.write(str(keywords))
> 
>      fileHandle.write("keyword info");
>      fileHandle.write(str(form.has_key("keywords")))
>      fileHandle.flush()
> 
>> here's the info I know:
>>
>> form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
>> MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
>> 'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
>> April 2002\\r\\n       \\r\\n       \r\n       '),
>> MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
>> small number of agri-businesses, many of them large corps. Yet these
>> subsidies are 6 times what rich countries provide in foreign aid to a
>> developing world that includes 5 billion people.\\r\\n       \r\n
>> '), MiniFieldStorage('updatebutton', 'Update')])
>> form.has_key("citation") = True
>>
>>
> 


From john106henry at hotmail.com  Thu Nov 30 15:08:16 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 12:08:16 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164916437.055932.193130@79g2000cws.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
	<qqGbh.10436$Gk5.6159@tornado.texas.rr.com>
	<1164916148.930057.280350@f1g2000cwa.googlegroups.com>
	<1164916437.055932.193130@79g2000cws.googlegroups.com>
Message-ID: <1164917296.255080.149660@j72g2000cwa.googlegroups.com>


John Henry wrote:

>
> Further, if splitUp is a sub-class of string, then I can do:
>
> alist, blist, clist, dlist = "ABCDEFGHIJ".slice((1,1,3,None))
>
> Now, can I override the slice operator?

Maybe like:

alist, blist, clist, dlist = newStr("ABCDEFGHIJ")[1,1,3,None]

where newStr is a sub-class of str, with a __repr__ that takes a
variable list of arguments?

(No clue how to code that yet, still pretty new to this)

Maybe they should make this a standard slicing feature....



From m.yanowitz at kearfott.com  Tue Nov 21 07:24:21 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Tue, 21 Nov 2006 07:24:21 -0500
Subject: Software Compatable with other versions?
Message-ID: <003601c70d67$f94fd620$0d7d12ac@kearfott.com>

Hello:

  I am still using Python 2.4.3, I haven't upgraded yet.
However, I would like to know if my 2.4.3 programs will run
in 2.5 without modification.
  Is there any way to test that my software is compatable
with 2.5 (or any other version), without actually installing
that version?:

  I have been told that the .pyc are not compatable. Is it
possible, to convert a 2.4.x .pyc to a 2.5 .pyc?

Thanks in advance:
Michael Yanowitz




From steve at holdenweb.com  Thu Nov 16 05:50:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 10:50:49 +0000
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejhep2$kva$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>	<ejhcdm$3pv$1@wake.carmen.se>	<ejhdnt$hq6$1@sea.gmane.org>	<ejheig$jai$1@sea.gmane.org>
	<ejhep2$kva$1@sea.gmane.org>
Message-ID: <ejhfnt$lna$4@sea.gmane.org>

Fredrik Lundh wrote:
> Steve Holden wrote:
> 
>> I'm always surprised by the amount of energy that's put into this type 
>> of discussion - even the OP has suggested that this isn't a big issue. 
>> If it's not a big issue why is this thread still going?
> 
> http://www.bikeshed.org/
> 
I deliberately avoided using that analogy, but I'm sorry to say it 
*does* apply. I'd hate to see c.l.py descend to becoming a wibble group.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From fredrik at pythonware.com  Sun Nov 19 15:19:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 21:19:15 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>	<455d507d$0$18480$9b622d9e@news.freenet.de>	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
Message-ID: <ejqe87$vd1$1@sea.gmane.org>

gabor wrote:

> yes, sure... but then.. it's possible to implement it also on top of an 
> raise-when-error version :)

not necessarily if raise-when-error means raise-error-in-os-listdir.

</F>



From bj_666 at gmx.net  Mon Nov 13 14:58:50 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 13 Nov 2006 20:58:50 +0100
Subject: Printing database output in tabular form
References: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.13.19.58.50.273929@gmx.net>

In <1163446803.990020.112810 at i42g2000cwa.googlegroups.com>, ronrsr wrote:

> when I try to print a web table containing output from a database, I am
> getting more info than I want- -
> 
> I would like this to print w'o the array('c',    AND I'd like the
> control characters to print as HTML control chars.

Look up the `tostring()` method on `array.array` objects and
`str.replace()` for replacing the line ends by '<br />'.

Ciao,
	Marc 'BlackJack' Rintsch


From bla at bla.com  Thu Nov 30 09:38:11 2006
From: bla at bla.com (Vincent Delporte)
Date: Thu, 30 Nov 2006 15:38:11 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
Message-ID: <7nqtm25fq8vk4jlu577n974hgei3ese3g7@4ax.com>

On Tue, 28 Nov 2006 04:30:09 -0600, Nick Craig-Wood
<nick at craig-wood.com> wrote:
>I'm not sure how you do open stdout to /dev/null in python though!
>
>I suspect something like this...
>
>  import posix
>  posix.close(1)
>  posix.open("/dev/null", posix.O_WRONLY)

Thanks everyone, but no go :-/ Neither the above nor "sys.stdout =
open(os.devnull, 'w') " trigger the application.

This is a script that is launched by the Asterisk open-source PBX
server when a call comes in. Its goal is to broadcast some messages to
a Windows caller ID application that is installed on all client hosts
so that they know who's calling.

Before I go ask in an Asterisk forum, is there some Python-related
issue that experienced Python developers can spot in this rewrite of a
Perl script that works?

Here's the original Perl script:
http://www.voip-info.org/wiki/view/Asterisk+NetCID

Here's my Python rewrite:
http://codecomplete.free.fr/asterisk/python_cid.txt

Yes, I changed the UDP port from 42685 to 42687 so that my development
client host is the only one getting the broadcast :-)

Thank you!


From Bulkan at gmail.com  Wed Nov  8 01:24:40 2006
From: Bulkan at gmail.com (placid)
Date: 7 Nov 2006 22:24:40 -0800
Subject: Python memory usage
In-Reply-To: <1162966901.337252.45720@m7g2000cwm.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
Message-ID: <1162967080.689144.320940@f16g2000cwb.googlegroups.com>


Klaas wrote:
> placid wrote:
> > Hi All,
> >
> > Just wondering when i run the following code;
> >
> > for i in range(1000000):
> >      print i
> >
> > the memory usage of Python spikes and when the range(..) block finishes
> > execution the memory usage does not drop down. Is there a way of
> > freeing this memory that range(..) allocated?
>
> Python maintains a freelist for integers which is never freed (I don't
> believe this has changed in 2.5).  Normally this isn't an issue since
> the number of distinct integers in simultaneous use is small (assuming
> you aren't executing the above snippet).

Actually i am executing that code snippet and creating BeautifulSoup
objects in the range()  (now xrange() ) code block. 

Cheers



From fredrik at pythonware.com  Sat Nov 25 03:56:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 09:56:33 +0100
Subject: Inheritance and recursion problem
In-Reply-To: <ek8v2b$luv$1@sunce.iskon.hr>
References: <ek8v2b$luv$1@sunce.iskon.hr>
Message-ID: <ek90g6$o3l$1@sea.gmane.org>

Spiro wrote:

> XWindow have all drawing functionality and Windows[] object which holds 
> all child windows.
 >
> Function Draw looks like this:
> def Draw(self):
> 	self.Back.blit
> 	for wnd in self.Windows:
> 		wnd.Draw(OffsetX, OffsetY)
> 
> Now in main module i make objects:
> RootWindow=XWindow()
> MW=XMainWindow()
> RootWindow.Widnows.append(MW)

just a guess: you've written

     class XWindow:
         Windows = [] # class attribute, shared by all instances

instead of

     class XWindow:
         def __init__(self, ...):
             self.Windows = [] # create new instance attribute

</F>



From m.sloyko at gmail.com  Fri Nov  3 02:51:29 2006
From: m.sloyko at gmail.com (Maxim Sloyko)
Date: 2 Nov 2006 23:51:29 -0800
Subject: Javascript is turning into Python?!
In-Reply-To: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
References: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
Message-ID: <1162540289.138892.206990@b28g2000cwb.googlegroups.com>


Paul Rubin wrote:
> [Correction of earlier accidental crosspost]
>
> I hadn't seen this before.  New Javascript 1.7 features:
>
> - Generators
> - Iterators
> - Array comprehensions
> - Destructuring assignment
>
> Sounds like another language we know.
>
> http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7

If you're talking about Mozilla Javascript, then most certanly yes.
Mozilla team even plan to support Python in XUL. If you're talking
about some standard (ECMAscript), then, well I haven't seen any
progress there.



From helonice at yahoo.com  Tue Nov 28 06:28:56 2006
From: helonice at yahoo.com (Alex S)
Date: Tue, 28 Nov 2006 11:28:56 -0000
Subject: os.walk return hex excapes
Message-ID: <ekh6ho+9d4c@eGroups.com>

Hi,
os.walk return hex excape sequence inside a files name, and when i try
to feed it back to os.remove i get 

OSError: [Errno 22] Invalid argument:
'C:\\Temp\\?p?\xbfS\xbf\xac?G\xaba ACDSee \xbb?a??n a???\xac\xb5\xbfn.exe'



From tanto.sugiarto at gmail.com  Sat Nov 11 08:56:16 2006
From: tanto.sugiarto at gmail.com (tsjuan)
Date: 11 Nov 2006 05:56:16 -0800
Subject: Python opening multiple thread of matlab
Message-ID: <1163253376.388256.146310@h54g2000cwb.googlegroups.com>

Hello Python Users,

I've been trying to run multiple thread of Matlab by calling its com
object
via python. However, I keep getting error message that says Python
can't
find the attribute of certain function that I want to execute in
Matlab.

I know the com function is exist, it works just fine if I don't run
within thread.
Below is my sample code, any helps or comments are appreciated.

Thanks,
Tanto

import threading
from win32com.client import Dispatch


class MyThread ( threading.Thread ):

   def __init__(self,matlab_command):
       self.matlab_command = matlab_command
       self.matlab_object = Dispatch('matlab.application.single')
       threading.Thread.__init__(self)

   def run(self):
       execute = getattr(self.matlab_object,'Execute')
       execute(self.matlab_command)

   def awesome_dud(self):
       execute = getattr(self.matlab_object,'Execute')
       execute(self.matlab_command)


a = MyThread('a=1:1:100')
b = MyThread('b=1:1:200')

# Running matlab function through thread (It's not working)
# =========================================================

a.start()
b.start()
a.join()
b.join()

# Running matlab function not through thread (it's working)
# =========================================================
a.awesome_dud()
b.awesome_dud()



From jolley84 at yahoo.com.cn  Fri Nov 24 02:41:22 2006
From: jolley84 at yahoo.com.cn (=?gb2312?q?=B7=C5=DC=F8=20=CC=B8?=)
Date: Fri, 24 Nov 2006 15:41:22 +0800 (CST)
Subject: call python with python extension in c 
Message-ID: <20061124074122.58897.qmail@web15605.mail.cnb.yahoo.com>

hello all,  i am a newcomer, and i bring a quesition here: how can i call python app with wxPython/other python extensions in c?
  here is my code here,though not smart,it can explain myself to some extent,in addition,pls forgive me not checking the return value after each calling PyRun_SimpleString,just in the purpose of keeping the code more easier readability:
  #include "python.h" 
#include <iostream> 
using namespace std; 

  int main() 
{ 
  Py_Initialize(); 
if(!Py_IsInitialized()) 
{ 
    cerr << " initialization fails!" << endl; 
    return -1; 
  } 


    PyRun_SimpleString("from wxPython.wx import *"); 
  PyRun_SimpleString("class myApp(wxApp):"); 
  PyRun_SimpleString("        def OnInit(self):"); 
  PyRun_SimpleString("              frame 
=wxFrame(NULL,-1,"hello,world")"); 
  PyRun_SimpleString("              frame.Show(true)"); 
  PyRun_SimpleString("              self.SetTopWindow(frame)"); 
  PyRun_SimpleString("              return true"); 
  PyRun_SimpleString("app = myApp()"); 
  PyRun_SimpleString("app.MainLoop()"); 

    Py_Finalize(); 
   return 0; 
  } 
from the code above,we can see clearly i intend to build up an simple framework with its title "hello,world".but it doesnot work. mainly due to the python extension wxpython, i think.coz if i doesnot write something connected with python extension,such as wxPython.it will run normally, later my work on wxpython include ,first build the wxpython source code into  some pyds and dlls, at this point, i add the pyds and dlls to the vc directory and c:\WINDOWS\system32\.unfortunately,it doesnot work.now my head aches, the whole progress is messed up. i nearly want to say goodbye to my boss.so anyway,help me,ok?
  and i have searched  almost anywhere,nobody i could turn to help,the feedback is little,and i am in despair.
  regards,
  jolley



 		
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From julvar at nospamtamu.edu  Sun Nov 12 20:34:17 2006
From: julvar at nospamtamu.edu (Julian)
Date: Sun, 12 Nov 2006 19:34:17 -0600
Subject: adding python scripting to my application
References: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
	<1162840279.875373.301550@f16g2000cwb.googlegroups.com>
	<1162843693.517313.286480@m73g2000cwd.googlegroups.com>
Message-ID: <ej8i2l$vie$1@news.tamu.edu>


"martdi" <martin.dion at gmail.com> wrote in message 
news:1162843693.517313.286480 at m73g2000cwd.googlegroups.com...
> Jerry wrote:
>> I am not a Python guru by any means, but I believe that when an
>> application says that you can "script" their application with Python,
>> it means that you can actually write Python code to interact with the
>> application.  Embedding may be the same thing.  Extending (as I read
>> it) involves writing portions of your program in Python and have do the
>> logic portions.
>>
>> If you would like to allow users to write small scripts that interact
>> with your program and control it (a la VBScript or AppleScript), then I
>> believe embedding Python in your program is what you want.
>>
>> If you would like Python to run various parts of your program in order
>> to make some portions easier to write/manage/whatever, then you want to
>> "extend" your program using Python.
>>
>> The key difference being that you aren't providing a way for someone
>> else to interact with your program using Python if you are extending.
>>
>> Again, I am not a guru and a read through the docs on python.org would
>> probably be the best place to get sound technical advice on these
>> subjects.
>>
>> --
>> Jerry
>
>
> I'm not sure either, but I though Extending was making the C/C++ Code
> available from Python, while Embedding was making Python Code Available
> in your app.
>

Like I mentioned in my first post, one of the purposes of linking to python 
would be to run multiple cases in a for loop.
that would mean passing information from the python script to my c++ 
application. mean python would have to be the top-level program.
so, I think I should be looking at extending my program. I am going to look 
at using swig for this..

thanks,
Julian. 




From Bajohr at hadakon.de  Fri Nov 10 05:29:01 2006
From: Bajohr at hadakon.de (Marcus Bajohr)
Date: Fri, 10 Nov 2006 11:29:01 +0100
Subject: Newb: installing Jython on Windows XP ...
In-Reply-To: <1163095323.668867.58320@i42g2000cwa.googlegroups.com>
References: <1163095323.668867.58320@i42g2000cwa.googlegroups.com>
Message-ID: <4554546D.7060008@hadakon.de>

donkeyboy wrote:
> All,
> 
> I'm having issues installing Jython on Windows XP. I've looked on the
> web and this newsgroup but to no avail. Any suggestions? The shell
> listing is below:
> 
> NB I've got Cygwin installed, hence the Unix 'ls' on a Windows box
> 
> C:\>cd Jython
> 
> C:\Jython>ls
> jython_21.class
> 
> C:\Jython>ls "c:\Program Files\Java\jdk1.5.0_09\bin\java.exe"
> c:\Program Files\Java\jdk1.5.0_09\bin\java.exe
> 
> C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython_21
> Exception in thread "main" java.lang.NoClassDefFoundError: jython_21
> 
> C:\Jython>"c:\Program Files\Java\jdk1.5.0_09\bin\java.exe" jython-21
> Exception in thread "main" java.lang.NoClassDefFoundError: jython-21
> 
> Any help would be of great use!!!
> 
Try it from cmd, not from the cygwin shell.
The environments differ !

greets
Marcus



From horpner at yahoo.com  Thu Nov 30 14:25:52 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 30 Nov 2006 20:25:52 +0100
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<slrnemubvi.194.horpner@FIAD06.norwich.edu>
Message-ID: <slrnemuc4e.194.horpner@FIAD06.norwich.edu>

On 2006-11-30, Neil Cerutti <horpner at yahoo.com> wrote:
> On 2006-11-30, John Henry <john106henry at hotmail.com> wrote:
>> If I have a list of say, 10 elements and I need to slice it into
>> irregular size list, I would have to create a bunch of temporary
>> variables and then regroup them afterwords, like:
>>
>> # Just for illustration. Alist can be any existing 10 element list
>> a_list=("",)*10
>> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
>> alist=(a,)
>> blist=(b,)
>> clist=(c1,c2,c3)
>> dlist=(d2,d3,d4,d5)
>>
>> That obviously work but do I *really* have to do that?
>
> Please post actual code we can run, rather than text that is
> almost, but not quite, entirely unlike Python code.

Ummm... that comment is withdrawn. :-O

-- 
Neil Cerutti


From no-spam at no-spam-no-spam.invalid  Sat Nov  4 08:53:44 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 04 Nov 2006 14:53:44 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162645648.361708.99490@f16g2000cwb.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162645648.361708.99490@f16g2000cwb.googlegroups.com>
Message-ID: <eii61d$g6f$1@news.albasani.net>

GHUM wrote:
> robert,
> 
>> Interprocess communication is tedious and out of questio
> [...]
>> I expect to be able to directly push around Python Object-Trees between the 2 (or more) interpreters by doing some careful locking.
> 
> Please do yourself a favour and have a look at pyro. pyro makes
> InterComputer and InterProcess Communication a snap. And it allows you
> to push around Python Objects not only between processes, but
> computers.
> 
> Maybe it solves your problem much easier and even more than you want to
> solve it now by being able to use more then one computer.
> 

another MPI - pickles and worse on the network :-(   Havy networked batch jobs were never a problem with Python. Thats what I want to go away from. Read the rest of this thread. Discussion is about in-place object tunnel for fine grained high-speed SMP multi-threading ("memory bus")


From aahz at pythoncraft.com  Wed Nov  8 10:32:42 2006
From: aahz at pythoncraft.com (Aahz)
Date: 8 Nov 2006 07:32:42 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
Message-ID: <eistaq$m7u$1@panix3.panix.com>

In article <1162997345.277966.31860 at h48g2000cwc.googlegroups.com>,
Beliavsky <beliavsky at aol.com> wrote:
>
>If this is supposed to justify using bad language in a public forum,
>it is poorly reasoned. Having heard "f***" does not mean they were not
>annoyed. 100% of people have seen trash on the street, but that does
>not justify littering. If a group of people don't mind profanity, there
>is no harm in their swearing to each other. But Usenet is read by a
>wide range of people, and needlessly offending some of them is wrong.
>The OP used "f******" just for emphasis. English is a rich language,
>and there are better ways of doing that.

Oh, gimme a fucking break.  Do a simple Gooja search to find out how
often people already use "fuck" around here.  I think you're the one who
needs to justify your position.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From monica.medina at ngc.com  Wed Nov  1 17:56:39 2006
From: monica.medina at ngc.com (matey)
Date: 1 Nov 2006 14:56:39 -0800
Subject: Python and SSL enabled
In-Reply-To: <IpydneCVwuGYqdXYnZ2dnUVZ_sCdnZ2d@comcast.com>
References: <1161711493.617569.178870@h48g2000cwc.googlegroups.com>
	<bsidnSHPkPHlKqLYnZ2dnUVZ_v2dnZ2d@comcast.com>
	<1162328451.004606.194700@m7g2000cwm.googlegroups.com>
	<IpydneCVwuGYqdXYnZ2dnUVZ_sCdnZ2d@comcast.com>
Message-ID: <1162421799.262364.100190@e3g2000cwe.googlegroups.com>

Firstly, thank for answering.  Otherwise I wouldn't know where to turn
for help.......


I tried to run the following simple program....

#!/usr/local/bin/python

import M2Crypto

u = M2Crypto.m2urllib.URLopener()
u.open('http://www.yahoo.com')

However I got the following errror:

Traceback (most recent call last):
  File "test.py", line 3, in ?
    import M2Crypto
  File "/home/mmedina/python2.3/site-packages/M2Crypto/__init__.py",
line 14, in ?
    import __m2crypto
ImportError: ld.so.1: python: fatal: relocation error: file
/home/mmedina/python2.3/site-packages/M2Crypto/__m2crypto.so: symbol
d2i_SSL_SESSION: referenced symbol not found
cengsu01:/home/mmedina/scripts/python >

However, I went back to INSTALL instructions for m2crytpo.  I saw I
forgot to run alltests.py

I ran the alltests.py and received the following:

Traceback (most recent call last):
  File "alltests.py", line 61, in ?
    from M2Crypto import Rand
  File
"/home/mmedina/crypt/m2kcrypto/m2crypto-0.16/M2Crypto/__init__.py",
line 14, in ?
    import __m2crypto
ImportError: No module named __m2crypto
cengsu01:/home/mmedina/crypt/m2kcrypto/m2crypto-0.16/tests

Can you tell me what I did not do?

Thanks in advance.

Heikki Toivonen wrote:
> matey wrote:
> > However, when I use the following command: python setup.py install
> > I get the following error:
> >
> > creating /usr/local/lib/python2.3/site-packages/M2Crypto
> > error: could not create
> > '/usr/local/lib/python2.3/site-packages/M2Crypto': Permission denied
>
> Ok, it looks like you M2Crypto built ok, but now you face this
> permission problem which is not specific to M2Crypto. You'd run into
> this with any 3rd party python module.
>
> > Since I don't have root privleges can I install the M2Crypto somewhere
> > else?
>
> You could manually copy the built M2Crypto directory somewhere in your
> home directory, for example:
>
> /home/mmedina/python2.3/site-packages/M2Crypto
>
> Then, you'd edit (or create) PYTHONPATH environment variable so that it
> contained /home/mmedina/python2.3/site-packages. After that you should
> be able to import M2Crypto in your scripts. In the future if you needed
> more 3rd party libs you could just place them as siblings of M2Crypto in
> your personal site-packages dir we created above.
>
> An alternative is to copy M2Crypto and any other 3rd party libs into the
> same dir where your python script is so that when you do an import, the
> 3rd party libs are found in the same dir.
> 
> -- 
>   Heikki Toivonen



From dingbat at codesmiths.com  Mon Nov 13 18:12:15 2006
From: dingbat at codesmiths.com (Andy Dingley)
Date: 13 Nov 2006 15:12:15 -0800
Subject: HTML Parsing and Indexing
In-Reply-To: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
References: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
Message-ID: <1163459535.702383.15050@k70g2000cwa.googlegroups.com>


mailtogops at gmail.com wrote:

>     I am involved in one project which tends to collect news
> information published on selected, known web sites inthe format of
> HTML, RSS, etc

I just can't imagine why anyone would still want to do this.

With RSS, it's an easy (if not trivial) problem.

With HTML it's hard, it's unstable, and the legality of recycling
others' content like this is far from clear.  Are you _sure_ there's
still a need to do this thoroughly awkward task?  How many sites are
there that are worth scraping, permit scraping, and don't yet offer RSS
?



From jjl at pobox.com  Thu Nov 30 20:47:03 2006
From: jjl at pobox.com (John J. Lee)
Date: Fri, 01 Dec 2006 01:47:03 GMT
Subject: urllib2 spinning CPU on read
References: <1164531283.213844.243990@l39g2000cwd.googlegroups.com>
	<87odqse5bk.fsf@pobox.com>
	<1164750241.199679.45610@n67g2000cwd.googlegroups.com>
Message-ID: <87k61ctmrg.fsf@pobox.com>

"kdotsky" <kdotsky at gmail.com> writes:

> > I didn't try looking at your example, but I think it's likely a bug
> > both in that site's HTTP server and in httplib.  If it's the same one
> > I saw, it's already reported, but nobody fixed it yet.
> >
> > http://python.org/sf/1411097
> >
> >
> > John
> 
> Thanks.  I tried the example in the link you gave, and it appears to be
> the same behavior.
> 
> Do you have any suggestions on how I could avoid this in the meantime?

Yes: read the recent messages on the tracker I linked to, and apply
the fix I suggest there.


John


From rjtucke at gmail.com  Wed Nov 29 22:42:16 2006
From: rjtucke at gmail.com (rjtucke)
Date: 29 Nov 2006 19:42:16 -0800
Subject: a quickie: range - x
Message-ID: <1164858136.495250.180790@14g2000cws.googlegroups.com>

I want an iterable from 0 to N except for element m (<=M).
I could write
x = range(N)
x.remove(m)
but I want it in one expression.

Thanks,
Ross



From fredrik at pythonware.com  Fri Nov  3 14:51:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 20:51:13 +0100
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <7xvelwib1b.fsf@ruckus.brouhaha.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
Message-ID: <eig6jg$mrc$1@sea.gmane.org>

Paul Rubin wrote:

>>      items = d.items()
>>      items.sort(key=operator.itemgetter(1), reverse=True)
>>
>> the items list would require a couple of megabytes for 150k dictionary
>> entries, or so.  the key map needs some memory too, but the rest of
>> the sort is done in place.
> 
> I think the OP's method avoided the key map.

right. I should have written "most efficient", not memory efficient. 
the items+itemgetter approach is a bit faster, but uses a few extra 
megabytes of memory temporarily, during the sort.

</F>



From matthew at agrip.org.uk  Sun Nov 26 06:30:50 2006
From: matthew at agrip.org.uk (Matthew Tylee Atkinson)
Date: Sun, 26 Nov 2006 11:30:50 +0000 (UTC)
Subject: Persistent Threads & Synchronisation
Message-ID: <ekbtta$753$1@news.freedom2surf.net>

I appear to be having some problems with the isAlive() method of
detecting if a thread is alive/active/running or not.  I'd be grateful
for any advice.

I have a visualisation program (which uses PyGame Extended [1]) that
presents content to the user and is meant to download the next batch of
content whilst the current one is being displayed.  To achieve this, I
created a thread to perform the downloading in the background (a class
based on threading.Thread).

They way I want it to work is this:  The downloading thread, when
spawned, stays alive for the duration of the program.  Occasionally the
main program will call a function in it to download the data and save it
as files on disk.  Then, these files are loaded by the main thread.
When this has happened, the main thread calls another function in the
download thread to delete the temporary files.  The same thing happens
next time a download is needed, when the user is looking at some other
content.

My problem is this: the downloading thread only seems to execute code
in a separate thread as long as the run() function (called by the
start() function) is running.  This is as per the documentation, of
course.  I am performing the download in the run() function, but the
file cleanup is still done with a separate call.  This actually does
work, after the download is over, and run() has terminated, but I
believe it isn't happening in a separate thread anymore (as previously I
made a mistake and called run() directly, instead of start() and it
blocked the main program).

I have been using join() to wait until the download is complete at the
point in the main program where it is absolutely necessary for the
download to have finished.  I'm trying to use the following code to
restart the downloading thread when I next need to use it:

    if not self.preview_thread.isAlive():
        self.preview_thread.start()

Unfortunately, isAlive() sometimes returns False when the thread is
actually still running.  This means that my code crashes out, on the
assertion in threading.Thread that self.__started is False.  The
documentation [2] explains that the issue of threads being ``alive''
has ``intentionally been left vague'', which doesn't inspire confidence
:-S.

To work around this problem, I was thinking of doing this:

    class PreviewThread(threading.Thread):
        . . .
        def run(self):
            self.download_data()
            while not self.temp_files_cleaned:
                pass
            return
        . . .
        def cleanup(self):
            . . .
            self.temp_files_cleaned = True

This should allow the thread to remain alive until after the download
*and* cleanup have been completed, so that I can be sure it's safe to
restart it when I next need to download more data.

My ultimate question: is this the right way to do things?  I don't like
the idea of making a loop such as that in the proposed run() function
above, it seems inefficient.  I am also concerned that it won't let me
call other functions in the thread, perhaps.

I did wonder about using a Condition, but that seems to be more suited
for synchronising between threads, which isn't really the issue here
(and thus it seems like overkill for solving the problem of replacing
that loop with something more efficient, though could be a possibility,
I suppose).

It seems I'm missing something big and possibly obvious about how to
make threads persistent.  I would like to know ``the right way'' to do
it and would really appreciate some advice on the subject.

Many thanks in advance!


[1] http://codereactor.net/projects/pygext/
[2] http://docs.python.org/lib/thread-objects.html
-- 
Matthew Tylee Atkinson <matthew at agrip.org.uk>


From fredrik at pythonware.com  Thu Nov 16 13:19:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 19:19:17 +0100
Subject: Heap Memory
In-Reply-To: <312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
Message-ID: <ejia35$cfk$1@sea.gmane.org>

Gregory Pi?ero wrote:

>> I have a question. How can we increase heap memory or total memory Python
>> interpreter
>> will use in order to avoid memory problems ?
> 
> I've wondered the same thing myself.  Even if it turns out it's just
> not possible I hope you get an answer.
> 
> My completely arbitrary guess is you'd have to recompile Python, but I
> hope I'm wrong.

what are you guys talking about?  there are no artificial memory 
limitations in Python; a Python process simply uses all the memory it 
can get from the operating system.

</F>



From fredrik at pythonware.com  Wed Nov 22 04:04:31 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 10:04:31 +0100
Subject: Trying to understand Python objects
In-Reply-To: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
Message-ID: <ek13qv$8ie$1@sea.gmane.org>

walterbyrd wrote:

> 1) Can attributes can added just anywhere? I create an object called
> point, then I can add attributes any time, and at any place in the
> program?

in general, yes, but that should be done sparingly.

> 2) Are classes typically created like this:
> 
> class Point:
>   pass
> 
> Then attributes are added at some other time?

no, classes with attributes are typically created like this:

     class Point:
         def __init__(self, x, y):
             self.x = x
             self.y = y

     p = Point(1, 2)

i.e. attributes are created in the initialization function.

> 3) What is with the __underscores__ ??

they're reserved for use by the interpreter, usually for calling special 
methods in you class:

    http://effbot.org/pyref/reserved-identifier-classes
    http://effbot.org/pyref/special-method-names

> 4) Are parameters passed to an class definition?
> 
> class Whatever(params):
>    pass

no, that's the syntax used for inheritance.  arguments passed to the 
class constructor are passed on to the initialization function (see the 
example above).

for more on this, see the tutorial.  Jay Parlar's gentle introduction 
from the community tutorial might be helpful:

     http://effbot.org/pytut/node11-baseline.htm

</F>



From wojciech_mula at poczta.null.onet.pl.invalid  Tue Nov 14 14:53:42 2006
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Tue, 14 Nov 2006 19:53:42 +0000 (UTC)
Subject: Tkinter: Strange behavior using place() and changing cursors
References: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
	<slrneljmv7.1kp.wojciech_mula@cat.tac>
	<1163522752.447520.86910@k70g2000cwa.googlegroups.com>
Message-ID: <slrnelk7l9.469.wojciech_mula@cat.tac>

Mudcat wrote:
> I have also determined that this is not a problem if the button is not
> packed inside the frame.  So somehow the interaction of the internal
> button is causing this problem.

Problem is really strange, and seems to be a Tk issue, not Tkinter.
I've observed that if method configure is called and **any** parameter
of frame is changed, then frame "forgets" all its children, gets natural
size and then pack children again!  This just(?) causes flickering, and
do not depend on geometry manager --- all place, pack and grid work in
this way.  But only place causes the problem --- I guess it do not block
events, or generate some events.

Workaround:

class Widget:
	def __init__(self, master):
		self.master = master
		self.buildFrame()
		self.buildWidget()
		self.x = 0
		self.y = 0

	# [snip]

	def enterFrame(self, event):
		if self.x != event.x or self.y != event.y:
			self.f.configure(cursor = 'sb_h_double_arrow')
			self.x, self.y = event.x, event.y

	def leaveFrame(self, event):
		if self.x != event.x or self.y != event.y:
			self.f.configure(cursor = '')
			self.x, self.y = event.x, event.y

w.


From jkn_gg at nicorp.f9.co.uk  Mon Nov 13 16:17:09 2006
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 13 Nov 2006 13:17:09 -0800
Subject: Is python for me?
In-Reply-To: <mailman.78.1163442868.32031.python-list@python.org>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
	<mailman.78.1163442868.32031.python-list@python.org>
Message-ID: <1163452629.173409.322170@m73g2000cwd.googlegroups.com>

Hi Carsten
>
> I'll run the risk of being nitpicky, but the full phrase is "Jack of all
> trades, master of none," which doesn't do Python justice. Python is a
> master of all trades!
>
FYI that's only *one* version of 'the full phrase'. I, for instance, am
a 'Jack of all trades, master of many'. I regard Python in the same
light ;-).

    jon N



From emin.shopper at gmail.com  Fri Nov  3 10:17:38 2006
From: emin.shopper at gmail.com (emin.shopper at gmail.com)
Date: 3 Nov 2006 07:17:38 -0800
Subject: emacs shell hangs on W32 with python
References: <1162508249.399337.233170@m73g2000cwd.googlegroups.com>
	<uu01hko4n.fsf@rkspeed-rugby.dk>
	<1162563579.312620.247480@b28g2000cwb.googlegroups.com>
	<mailman.94.1162565107.2155.help-gnu-emacs@gnu.org>
Message-ID: <1162567058.729292.316730@h54g2000cwb.googlegroups.com>

The same problems occur with the latest emacs binary from CVS
(emacs-version)

"GNU Emacs 23.0.0.1 (i386-mingw-nt5.1.2600) of 2006-10-16 on DTOP"

Lennart Borgman wrote:
> Would it not be a good idea to try the CVS version of Emacs for this now
> since the pretest will soon begin? Go here for precompiled versions:
>
>     http://www.emacswiki.org/cgi-bin/wiki/CategoryWThirtyTwo
>
>
>
>
> emin.shopper at gmail.com wrote:
> > Hmm, it doesn't even work if I run the cygwin version of GNU Emacs and
> > have it start the Windows version of python through python-mode or if I
> > start a shell in emacs and then start the Windows version of python
> > through the shell. Interestingly, however, things DO seem to work if I
> > use cygwin emacs with cygwin python (version 2.4.1).
> >
> > I wonder if the windows version of Tkinter does something weird such as
> > implicitly calling Tk.mainloop()...
> >
> > Any help would be much appreciated.
> >
> > Brian Elmegaard wrote:
> >
> >> emin.shopper at gmail.com writes:
> >>
> >>
> >>> Is there any way to run python through emacs or xemacs without having
> >>> it hang or is shell support broken?
> >>>
> >> Doing it from eshell gives the same problem :-(
> >> --
> >> Brian (remove the sport for mail)
> >> http://www.et.web.mek.dtu.dk/Staff/be/be.html
> >> Rugbyklubben Speed Scandinavian Open 7s Rugby http://www.rkspeed.dk
> >>



From fredrik at pythonware.com  Thu Nov 16 05:25:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:25:07 +0100
Subject: split CSV fields
In-Reply-To: <ejhduq$l5l$1@news.albasani.net>
References: <ejhduq$l5l$1@news.albasani.net>
Message-ID: <ejhea3$j68$2@sea.gmane.org>

robert wrote:

> What is a most simple expression for splitting a CSV line
 > with "-protected fields?
> 
> s='"123","a,b,\"c\"",5.640'

import csv

the preferred way is to read the file using that module.  if you insist 
on processing a single line, you can do

     cols = list(csv.reader([string]))

</F>



From mail at microcorp.co.za  Wed Nov  8 00:45:02 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 8 Nov 2006 07:45:02 +0200
Subject: [DLC] ChiPy Monthly Meeting, Thursday 7:00 pm.
References: <1162921007.26531.275231865@webmail.messagingengine.com>
	<eiqkpa$23c$1@sea.gmane.org>
Message-ID: <023601c70300$2d1ce460$03000080@hendrik>


 "Steve Holden" <steve at holdenweb.com> wrote:

> I don't suppose there's any chance that someone might be passing
> Schaumberg on their way to this meeting? I'm teaching there, and a ride
> would avoid me having to rent a car (and hence increase the probability
> I'd make it).

Where in the whole wide world is Schaumberg - "foam mountain" - is it near
Koekenaap?

- Hendrik



From Roka100 at gmail.com  Fri Nov 17 03:02:20 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 17 Nov 2006 00:02:20 -0800
Subject: wxFrame don't have Bind attribute ??
In-Reply-To: <u5qql211p8h7sprc47mhotju26cc7dlivj@4ax.com>
References: <1162189869.503325.51280@b28g2000cwb.googlegroups.com>
	<u5qql211p8h7sprc47mhotju26cc7dlivj@4ax.com>
Message-ID: <1163750540.443202.70400@m7g2000cwm.googlegroups.com>


Franz Steinhaeusler wrote:
> Is it really an instance of wx.Frame?
> What do you get, if you make a "print self" statement?
sovled it
I think it is an installation problem.
I used yum on FC6 to install wxPython 2.6
But after that I got that error.

Now I uninstalled them and did an installation of wxPy 2.7 manully.
It is ok now..



From bdesth.quelquechose at free.quelquepart.fr  Sun Nov 19 18:14:49 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Nov 2006 00:14:49 +0100
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163876085.013472.130390@f16g2000cwb.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
	<1163810800.915170.48580@e3g2000cwe.googlegroups.com>
	<1163868294.131526.308080@e3g2000cwe.googlegroups.com>
	<mailman.422.1163871294.32031.python-list@python.org>
	<1163876085.013472.130390@f16g2000cwb.googlegroups.com>
Message-ID: <4560e05b$0$6177$426a74cc@news.free.fr>

walterbyrd a ?crit :
> Fredrik Lundh wrote:
> 
> 
>>modularity, modularity, and modularity.
>>
> 
> 
> Can't PHP be made to be just as modular?

PHP has no notion of modules.

> As a matter of popular practise, I suppose that is not done. I would
> think that it could be.

Certainly not the way Python is modular...



From vd12005 at yahoo.fr  Fri Nov  3 16:42:33 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 3 Nov 2006 13:42:33 -0800
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <mailman.1739.1162583532.11739.python-list@python.org>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
Message-ID: <1162590153.024233.311670@b28g2000cwb.googlegroups.com>

thanks for your replies :)

so i just have tried, even if i think it will not go to the end => i
was wrong : it is around 1.400.000 entries by dict...

but maybe if keys of dicts are not duplicated in memory it can be done
(as all dicts will have the same keys, with different (count) values)?

memory is 4Gb of ram, is there a good way to know how much ram is used
directly from python  (or should i rely on 'top' and other unix
command? by now around 220mb is used for around 200.000 words handled
in 15 dicts)



From casevh at comcast.net  Wed Nov 15 00:30:12 2006
From: casevh at comcast.net (casevh at comcast.net)
Date: 14 Nov 2006 21:30:12 -0800
Subject: Python speed on Solaris 10
In-Reply-To: <mailman.154.1163518812.32031.python-list@python.org>
References: <mailman.154.1163518812.32031.python-list@python.org>
Message-ID: <1163568612.716692.31250@m7g2000cwm.googlegroups.com>


Chris Miles wrote:
> I have found that the sunfreeware.com build of Python 2.4.3 for Solaris
> 10 is faster than one I can build myself, on the same system.
> sunfreeware.com doesn't bother showing the options they used to
> configure and build the software, so does anyone know what the optimal
> build options are for Solaris 10 (x86)?
>
> Here are some pybench/pystone results, and I include the same comparison
> of Python2.4.3 running on CentOS 4.3 on the same hardware (which is what
> prompted me to find a faster Python build in the first place).
>
> Python 2.4.3:
>    System               pybench      Pystone (pystones/s)
> --------------------------------------------------------
>    Sol10 my build       3836.00 ms   37313.4
>    Sol10 sunfreeware    3235.00 ms   43859.6
>    CentOS               3569.00 ms   44247.8
>
>
> My build:
> Python 2.4.3 (#1, Oct 15 2006, 16:00:33)
> [GCC 3.4.3 (csl-sol210-3_4-branch+sol_rpath)] on sunos5
>
> sunfreeware.com build:
> Python 2.4.3 (#1, Jul 31 2006, 05:14:51)
> [GCC 3.4.6] on sunos5
>
> My build on CentOS 4.3:
> Python 2.4.3 (#1, Jul 19 2006, 17:52:43)
> [GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
>
>
> is the difference purely gcc minor version?
I noticed that speed difference, too. After running ./configure, I
edited the resulting Makefile to pass "-march=athlon-mp" to the C
compiler. ./configure seems to ignore CFLAGS, for example, so I just
edited Makefile to suit my environment. You should set the values
appropriate for you system, of course.

I've also compiled Python using the Sun Studio compiler. Some tests
were faster, some tests were slower.

casevh
 -- 
> http://chrismiles.info/



From spedrosa at gmail.com  Thu Nov 30 06:49:12 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 30 Nov 2006 03:49:12 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164874749.914101.32410@16g2000cwy.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164874749.914101.32410@16g2000cwy.googlegroups.com>
Message-ID: <1164887352.785404.47250@j44g2000cwa.googlegroups.com>


gavino escreveu:

> I want to learn to program and I can't seem to pick a direction.  A
> java guy I know makes a lot of $, but a lot of reading I have done
> shows lisp smalltalk and haskell to be really nice, as well as of
> course python.  It seems python is 4/5 way to lisp yet has a lot of
> people using it for practical things.  I also hear that it dominates in
> leaving readable code behind it.  Am I listening to too much marketing
> from non dominant tools?  I hear again and again how java is just
> putrid.  My instict says learn something like scheme but my smal
> experience sees only java people making money.. aggkk!!

You are going in the wrong direction. I've seen lots of "Java guys" in
the business for money. However, they are mediocre programmers and will
always be.

If you are serious about getting a programming career, you should not
be afraid to learn both Java and Python, perhaps C, Ruby, Lisp. They
are tools, and more knowledge never hurts.

For now, there are more Java (and .NET) offers. But things might
change.


Stephen



From metaperl at gmail.com  Mon Nov  6 10:37:47 2006
From: metaperl at gmail.com (metaperl)
Date: 6 Nov 2006 07:37:47 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <1161783204.875966.164720@b28g2000cwb.googlegroups.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<1161783204.875966.164720@b28g2000cwb.googlegroups.com>
Message-ID: <1162827467.001209.29600@f16g2000cwb.googlegroups.com>


rdsteph at mac.com wrote:
> Paul Boddie wrote:
>
> """The figures behind the scenes are quite enlightening for that
> particular page. If you (or community experiences) don't agree with the
>
> rankings (wxPython apparently even easier to learn than PythonCard and
> Tinder, a bunch of Gtk-based toolkits having more or less "full" Linux
> scores) then you'll have some surprises, I'm sure. Nevertheless, it's
> an interesting concept. """
>
> Well, I don't know what I was thinking, exactly, when I rated
> PythonCard's ease of use...so I went back and changed it to rate it a
> lot higher. The ratings in this script were done a long time ago now

I dropped Pythoncard when I could not sort multi column lists and when
I posted to the email list and no one answered me.

But prior to that it was great.



From matthew at agrip.org.uk  Mon Nov 27 06:57:20 2006
From: matthew at agrip.org.uk (Matthew Tylee Atkinson)
Date: Mon, 27 Nov 2006 11:57:20 +0000 (UTC)
Subject: Persistent Threads & Synchronisation
References: <ekbtqe$74s$2@news.freedom2surf.net>
	<M2mah.3488$sf5.3427@newsread4.news.pas.earthlink.net>
Message-ID: <ekejr0$r8l$1@news.freedom2surf.net>

On Sun, 26 Nov 2006 19:38:20 +0000, Dennis Lee Bieber wrote:
> 	Methods defined in a thread class but called from outside the
> running thread run in the environment of the caller, not as part of the
> thread (and if the method manipulates state you may run into conflicts).

Thanks very much; I'd arrived at this conclusion, but didn't know how to fix the
situation.

> 	You CAN NOT restart threads... You have to recreate the whole thread
> object. .start() can only be called ONCE on any thread object.

That clears a lot up.

> 	clean(), next(), and quit() will be called by the main thread as
> needed. The "preview thread" does nothing except wait for a command on
> the queue, then performs the operation requested. The main thread will
> have to ensure it calls the next() and clean() methods in proper
> sequence.

Excellent; thanks for the example.

> (How the main thread is informed of completion is something I
> don't know from your post).

Currently, I am using locks (as in threading.Lock()).

> 	If you /need/ to have overlapped downloads and cleanups, you will
> need TWO threads, and much more complex interlocking.

I don't, but thanks for the advice.

best regards,


-- 
Matthew Tylee Atkinson <matthew at agrip.org.uk>


From sybrenUSE at YOURthirdtower.com.imagination  Thu Nov  2 05:42:13 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 2 Nov 2006 11:42:13 +0100
Subject: other ways to check for <type 'function'>?
References: <1162462009.134922.283410@i42g2000cwa.googlegroups.com>
Message-ID: <slrnekjis5.rit.sybrenUSE@schuimige.stuvel.eu>

elderic enlightened us with:
> are there other ways than the ones below to check for <type
> 'function'> in a python script?

First of all, why would you want to? If you want to call the object
as a function, just do so. Handle the exception that is raised when
it's raised.

Sybren
-- 
Sybren St??vel
St??vel IT - http://www.stuvel.eu/


From cyberco at gmail.com  Sun Nov 19 15:01:22 2006
From: cyberco at gmail.com (cyberco)
Date: 19 Nov 2006 12:01:22 -0800
Subject: ElementTree: namespace declaration in each element?
In-Reply-To: <mailman.458.1163940906.32031.python-list@python.org>
References: <1163939038.754792.48730@e3g2000cwe.googlegroups.com>
	<mailman.458.1163940906.32031.python-list@python.org>
Message-ID: <1163966482.662827.99010@k70g2000cwa.googlegroups.com>

> written by a "it's the bytes, not the data" guy, obviously ;-)

hehehe...I figured it was. Wonder 'who' it was... ;)

> the standard serializer in 1.2 doesn't support default namespaces, so
> the quickest way to do this is to loop over all tags (use getiterator),
> strip off the "{http://xspf.org/ns/0/}" prefix, add an xmlns attribute
> to the root (if necessary), and write it out.

OK, that's what I was already doing. Thanks.
Will the standard serializer in 1.3 support default namespaces?



From skip at pobox.com  Sun Nov 12 15:00:56 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 12 Nov 2006 14:00:56 -0600
Subject: Random image text generation?
Message-ID: <17751.32120.390405.253158@montanaro.dyndns.org>


Is there a module out there that will generate an image with a random text
string such as the confirmation images you see on various websites?  I'm
thinking I'm going to have to add that to the forms on the Mojam websites.
Over the past couple weeks we've begun to get lots of spam submission crap.

Thx,

Skip



From rpdooling at gmail.com  Wed Nov  8 12:29:12 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 8 Nov 2006 09:29:12 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <mailman.1907.1163003856.11739.python-list@python.org>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<mailman.1907.1163003856.11739.python-list@python.org>
Message-ID: <1163006952.755754.88540@b28g2000cwb.googlegroups.com>


skip at pobox.com wrote:

> I'm with Beliavsky on this one.  I can't see any particular reason to curse
> in a forum such as c.l.py.  It just coarsens the discussion with no obvious
> positive benefit as far as I can see.

All true. But it's like picking your nose. Yes, it's bad manners in
public, but if somebody does it, why jump on it and call attention to
it? It just makes the thread three times longer. It's easier and more
efficient to just ignore it.

I say this after posting three messages on the topic :)

rd



From no-spam at no-spam-no-spam.invalid  Thu Nov  9 08:22:40 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 09 Nov 2006 14:22:40 +0100
Subject: Multithreaded C API Python questions
In-Reply-To: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
References: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>
Message-ID: <eiva35$v3m$1@news.albasani.net>

Svein Seldal wrote:
> Hi
> 
> A couple of mulithreaded C API python questions:
> 
> I) The PyGILState_Ensure() simply ensures python api call ability, it 
> doesnt actually lock the GIL, right?
> 
>      PyGILState_STATE gstate;
>     gstate = PyGILState_Ensure();
> 
> II) Am I required to lock the GIL prior to running any python functions 
> (in a threaded app)?
> 
>     PyThreadState *pts = PyGILState_GetThisThreadState();
>     PyEval_AcquireThread(pts);
>     PyObject_CallObject(...);
> 
> III) Shouldn't the GIL be released after 100 bytecodes or so to enable 
> other waiting threads to get the GIL?
> 
> I'm unable to get access to python as long as another python call is 
> executing. The PyEval_AcquireThread() call blocks until the first call 
> returns. I was hoping that the python system itself would release the 
> GIL after some execution, but it itsnt.
> 
> I am dependent upon the ability to have to threads executing in python 
> land at the same time. How can this be done?
>

PyGILState_Ensure/Release guarantees to establish the GIL - even if it was already held (useful if you deal with complex call ordering/dependencies)


PyObject_CallObject(...)     calls Python code. Thus the interpreter will switch and do as usuall during that.


In your/C/system... code  you are responsible to release the GIL or not to enable other Python threads (and prevent from deadlocks) 
Usually you'd do this 
* if you do time consuming C/system stuff
* or if the code can possibly renter Python through the system (e.g. when you call a Windows function which itself can create Windows messages to be routed back into Python message handlers)


-robert


From kentilton at gmail.com  Wed Nov  1 22:50:17 2006
From: kentilton at gmail.com (Ken Tilton)
Date: Wed, 01 Nov 2006 22:50:17 -0500
Subject: logo design
In-Reply-To: <1162432978.995731.291980@f16g2000cwb.googlegroups.com>
References: <1162103065.460796.303660@f16g2000cwb.googlegroups.com>
	<1162270625.966859.194730@m73g2000cwd.googlegroups.com>
	<1162377308.044332.212610@i42g2000cwa.googlegroups.com>
	<1162432978.995731.291980@f16g2000cwb.googlegroups.com>
Message-ID: <oWd2h.120$Rj2.118@newsfe10.lga>



alex23 wrote:
> Xah Lee wrote:
> 
>>No personal offense intended, but human animal's history is what? 3000
>>years at least in recorded history? And, all you can think of is what,
>>the view points of a fraction of your personal life span?
> 
> 
> Thank god evolution spat you out to lead us all to the light, huh?
> 
> No personal offense intended, but you're a boring, elitist prick.

Actually, no, Xah is pretty cool, give him a chance.

hth, kt

-- 
Cells: http://common-lisp.net/project/cells/

"I'll say I'm losing my grip, and it feels terrific."
    -- Smiling husband to scowling wife, New Yorker cartoon


From fredrik at dolda2000.com  Wed Nov 22 13:39:32 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Wed, 22 Nov 2006 19:39:32 +0100
Subject: KeyboardInterrupt from syscalls
Message-ID: <1164220772.5961.53.camel@pc7.dolda2000.com>

Dear List,

I was writing a Python extension module, including a sleeping call to
poll(2), and noticed, to my great surprise (and joy), that even when
blocking there, KeyboardInterrupt still worked properly when sending
SIGINTs to the interpreter. It really got me wondering how it works,
though.

I would have thought that I would have to check manually for interrupts
in one way or another, seeing how the thread in question should be stuck
in my syscall. Sure, I return on EINTR, but I only return Py_FALSE, not
NULL, so I wouldn't have thought that the interpreter would look for an
exception having taken place (I would assume that it gets set in the
sighandler).

So how does it work? Does my code get to return Py_FALSE, and the
interpreter ignores it, seeing that an exception is set? Is a non-local
exit performed right over my call stack (in which case my next question
would be how to clean up resources being used from my C code)? Or does
something completely else happen?

Fredrik Tolf




From cemerick at snowtide.com  Thu Nov 16 08:29:18 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Thu, 16 Nov 2006 08:29:18 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejho32$lim$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<ejhlar$bob$1@sea.gmane.org>
	<DC6E4BF7-C3F6-449C-9E2B-0668CE5749A9@snowtide.com>
	<ejho32$lim$1@sea.gmane.org>
Message-ID: <AEBDADE1-3CC8-4402-94FA-FB7A4150EDC3@snowtide.com>


On Nov 16, 2006, at 8:12 AM, Fredrik Lundh wrote:

> Chas Emerick wrote:
>
>> The principle and the practice diverge significantly in our neck of
>> the woods.  The current project involves consuming and making sense
>> of extraordinarily (and typically unnecessarily) complex XHTML.
>
> wasn't your original complaint that ET didn't do the "right thing"  
> when
> you removed elements from a mixed-content tree? (something than can be
> trivially handled with a 2-line helper function)

Yes, that was the initial issue, but the delta between Elements and  
DOM-style elements leads to other issues.  There's no doubt that the  
needed helpers are simple, but all things being equal, not having to  
carry them around anywhere we're doing DOM manipulations is a big plus.

> why mutate the tree if all you want is to extract information from it?
> doesn't sound very efficient to me...

Because we're far from doing anything that is regular or one-off in  
nature.  We're systematizing the extraction of data from functionally  
unstructured content, and it's flatly necessary to normalize the  
XHTML into something that can be easily consumed by the processes  
we've built that can do that content->data extraction/conversion from  
plain text, XML, PDF, and now XHTML.

Remember, corner cases. :-)

- Chas


From rbsharp at gmx.de  Wed Nov 15 04:48:43 2006
From: rbsharp at gmx.de (rbsharp at gmx.de)
Date: 15 Nov 2006 01:48:43 -0800
Subject: A question on Encoding and Decoding.
In-Reply-To: <mailman.147.1163514990.32031.python-list@python.org>
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>
	<mailman.147.1163514990.32031.python-list@python.org>
Message-ID: <1163584122.966665.149360@k70g2000cwa.googlegroups.com>

Hello,
I think this remark is more to the point. In my experience, the general
problem is that python operates with the default encoding "ascii" as in
sys.getdefaultencoding(). It is possible to set the defaultencoding in
sitecustomize.py, with sys.setdefaultencoding('latin1'). I have placed
sitecustomize.py in Lib/site-packages. It is not possible to set the
encoding once python has started. Setting the encoding only works if
you can bind yourself to this one encoding and is therefore no general
fix.
The only reasonable way to work is to get your strings into unicode
(and sometimes back out again).
If for instance you type:
s = "???????" and then try
us = unicode(s) you will get a traceback identical to yours.
However:
us = unicode(s,'latin1')
will work. If however to try:
print us
you will get another traceback.

try:
>>> print "%r" % us
u'\x84\x8e\x94\x99\x81\x9a\xe1'
Even if it is not pretty, at least the program won't crash.
You can get a better result with:
>>> print us.encode('latin1')
???????

The whole topic can get tedious at times, but be assured,
PyExcelerator, for writing, and xlrd for reading Excel files do work,
with unicode, both in the content and in the sheetnames. PyExcelerator
may be able to read Excel Sheets but not nearly as well as xlrd, which
works wonderfully.

regards,
Richard Sharp


Fredrik Lundh wrote:
> "kath" wrote:
>
> > Also python IDLE is able to output the same character corretly when I
> > say print and why not I?
>
> probably because IDLE's interactive window is Unicode-aware, but your terminal
> is not.
> 
> </F>



From horpner at yahoo.com  Thu Nov 16 08:43:35 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 16 Nov 2006 14:43:35 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
	<ejhcdm$3pv$1@wake.carmen.se> <ejhdnt$hq6$1@sea.gmane.org>
	<mailman.237.1163672997.32031.python-list@python.org>
Message-ID: <slrneloqpm.1pc.horpner@FIAD06.norwich.edu>

On 2006-11-16, Steve Holden <steve at holdenweb.com> wrote:
> I'm always surprised by the amount of energy that's put into
> this type of discussion - even the OP has suggested that this
> isn't a big issue. If it's not a big issue why is this thread
> still going? Every language has a syntax. Why not just accept
> it as a given and get on with more productive activities?

That's all very well if the language has a compromised and ad-hoc
syntax. But since Python has a nice clean syntax, it makes me
want to be associated with it by investing in its discussions. ;-)

-- 
Neil Cerutti


From michael.pearmain at tangozebra.com  Tue Nov 28 06:23:47 2006
From: michael.pearmain at tangozebra.com (Mike P)
Date: 28 Nov 2006 03:23:47 -0800
Subject: SAX2 Download
Message-ID: <1164713027.460945.252580@n67g2000cwd.googlegroups.com>

Does anyone know where i can download acopy of the SAX2 module?

Cheers

Mike



From jrpfinch at gmail.com  Thu Nov 23 10:28:17 2006
From: jrpfinch at gmail.com (jrpfinch)
Date: 23 Nov 2006 07:28:17 -0800
Subject: Simple threading
Message-ID: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>

I'm just getting started on threading and was wondering why the
following code does not work (i know globals is bad style - I'll
eliminate them eventually).  All I get is a blank cursor flashing.

Many thanks

Jon

import threading
import sys
import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick


g_secondspertick=5
g_datum=time.time()
g_currenttick=1
g_rawfile=open('inputashes.txt','r')
g_rawtext=g_rawfile.read()
g_overs=g_rawtext.split('<P>')
g_currentover=0


class ImapThread(threading.Thread):
    def run(self):
        global g_currenttick
        if time.time() > (g_datum + (g_secondspertick *
g_currenttick)):
            print "Ticked %s" % g_currenttick
            g_currenttick=g_currenttick+1
            print g_currenttick
            sys.stdout.flush()
    time.sleep(0.01)

def main():
    ImapThread().start()
    while 1:
        pass

if __name__ == "__main__":
    main()



From JohnRoth1 at jhrothjr.com  Thu Nov 16 08:56:13 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 16 Nov 2006 05:56:13 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <1163685373.707667.84560@b28g2000cwb.googlegroups.com>


walterbyrd wrote:
> Some think it will.
>
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
>
> IMO: it won't make much difference. But I don't really know.

In my opinion, GPLing Java won't have any immediate effect
on who uses which for what kind of project. Longer term, however,
I see a number of efforts to clean up some of Java's more
egregious syntax problems. I've already seen one proposal,
and there will undoubtedly be others. If any of them fly, they'll
probably be folded into the base in a few years, and that will
diminish the ease of use / large project divide between the
two languages.

John Roth



From svein at seldal dot com  Thu Nov  9 07:49:07 2006
From: svein at seldal dot com (Svein Seldal)
Date: Thu, 09 Nov 2006 13:49:07 +0100
Subject: Multithreaded C API Python questions
Message-ID: <kf6dnYMVj_Bavs7YRVnzvQ@telenor.com>

Hi

A couple of mulithreaded C API python questions:

I) The PyGILState_Ensure() simply ensures python api call ability, it 
doesnt actually lock the GIL, right?

  	PyGILState_STATE gstate;
	gstate = PyGILState_Ensure();

II) Am I required to lock the GIL prior to running any python functions 
(in a threaded app)?

	PyThreadState *pts = PyGILState_GetThisThreadState();
	PyEval_AcquireThread(pts);
	PyObject_CallObject(...);

III) Shouldn't the GIL be released after 100 bytecodes or so to enable 
other waiting threads to get the GIL?

I'm unable to get access to python as long as another python call is 
executing. The PyEval_AcquireThread() call blocks until the first call 
returns. I was hoping that the python system itself would release the 
GIL after some execution, but it itsnt.

I am dependent upon the ability to have to threads executing in python 
land at the same time. How can this be done?


Regards,
Svein Seldal


From icebergwtf at yahoo.com.cn  Wed Nov  1 09:16:48 2006
From: icebergwtf at yahoo.com.cn (Tiefeng Wu)
Date: Wed, 1 Nov 2006 22:16:48 +0800 (CST)
Subject: Make all files extension lower by a given directory name
Message-ID: <20061101141648.38737.qmail@web15001.mail.cnb.yahoo.com>

Fredrik Lundh wrote:
> >             fullname = name[:len(name) - 1] + ext.lower()
> are you sure you want to strip off the last character in the actual 
> filename?  should "FOO.BAR" really be turned into "FO.bar" ?
> name[:len(name) - 1] can be written name[:-1], btw.
> >             os.rename(os.path.join(path, file), os.path.join(path, fullname))
> > 
> > I know this code is lame
> except for the potential bug, and possibly the lack of error handling 
> for the os.rename call, I'm not sure why you think that.
> </F>

thanks a lot!

strip off the last character because if simply add name and ext I got result like "FOO..bar", there are two dots.
I'm using python25, btw.

for the lack of error handling, because I'm a newbie and don't think about it at all :P

wutiefeng
2006-11-01


	

	
		
___________________________________________________________ 
Mp3???-???????
http://music.yahoo.com.cn/?source=mail_mailbox_footer


From robert.kern at gmail.com  Mon Nov  6 18:34:11 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 06 Nov 2006 17:34:11 -0600
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162854476.903789.5550@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>	<mailman.1818.1162845307.11739.python-list@python.org>	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
	<1162854476.903789.5550@b28g2000cwb.googlegroups.com>
Message-ID: <eiogps$c1d$1@sea.gmane.org>

John Machin wrote:
> Indeed yourself. Have you ever considered reading posts in
> chronological order, or reading all posts in a thread?

That presumes that messages arrive in chronological order and transmissions are
instantaneous. Neither are true.

-- 
Robert Kern

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



From john106henry at hotmail.com  Mon Nov 20 21:24:08 2006
From: john106henry at hotmail.com (John Henry)
Date: 20 Nov 2006 18:24:08 -0800
Subject: Looking for a graph (as in network, nodes) package
In-Reply-To: <1164050261.317752.247330@k70g2000cwa.googlegroups.com>
References: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
	<1164050261.317752.247330@k70g2000cwa.googlegroups.com>
Message-ID: <1164075848.100212.160880@b28g2000cwb.googlegroups.com>

Thanks, downloading now.

boggom at comcast.net wrote:
> John,  networkx at networkx.lanl.gov
>
>
> John Henry wrote:
> > I am looking for a ready made simple graph package.



From ray_usenet at yahoo.com  Thu Nov 16 07:52:11 2006
From: ray_usenet at yahoo.com (Ray)
Date: 16 Nov 2006 04:52:11 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <1163681530.904104.305000@h48g2000cwc.googlegroups.com>


walterbyrd wrote:
> Some think it will.

How so? Just because Java is GPL doesn't mean you can type less while
coding in it.

BufferedOutputStream bos = new BufferedOutputStream(new
FileOutputStream());

is still like that GPL or no GPL, no?

> Up untill now, Java has never been standard across different versions
> of Linux and Unix.

The last company I worked for has been delivering products on Windows,
Linux, and Solaris for years. We've never had to resort to any
"platform-specific" stuff with Java.

> Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.

Becoming a better Java, maybe. Becoming more like Python? No way. I
have high hopes for Jython though, Charles Nutter from JRuby has been
having an ongoing discussion with the Jython developers in jython-dev.
Interesting stuff!

> IMO: it won't make much difference. But I don't really know.



From e0427417 at student.tuwien.ac.at  Mon Nov 20 22:01:38 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Tue, 21 Nov 2006 04:01:38 +0100
Subject: a few extensions for the itertools
In-Reply-To: <1164061431.581363.156430@m73g2000cwd.googlegroups.com>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<mailman.478.1163992943.32031.python-list@python.org>
	<45616b46$0$12642$3b214f66@tunews.univie.ac.at>
	<1164061431.581363.156430@m73g2000cwd.googlegroups.com>
Message-ID: <45626bb0$0$8024$3b214f66@tunews.univie.ac.at>

Klaas wrote:
> Mathias Panzenboeck wrote:
> 
>> It's like the . operator in haskell:
>>
>> fchain(f,g,h) is the same like lambda *args,**kwargs: f(g(h(*args,**kwargs)))
> 
> I used this once:
> 
> composedfun = lambda arg: reduce(lambda x, f: f(x), funcs, arg)
> 

Nice! Certainly more beautiful than my version.

> so I can see the potential need (it is not terribly obvious in short-
> or long- form).
> 
> If this belongs anywhere, though, it is functools, not itertools.
> 

Yes, got in there by accident.

> -Mike
> 


From steve at holdenweb.com  Thu Nov  2 07:53:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 12:53:09 +0000
Subject: can I import the module twice (under differnet names)
In-Reply-To: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>
References: <QLudneFR2oM4HtTYnZ2dnUVZ_vmdnZ2d@comcast.com>
Message-ID: <eicple$a3n$1@sea.gmane.org>

alf wrote:
> Hi,
> 
> wonder if in the python I could treat modules imorts like classes 
> instances. It means I could import it twice or more times under 
> different names.
> 
If you want to repeat the full import, and have each imported version 
get an independent namespace as well as independent code objects and so 
on then you will have to somehow persuade the interpreter that they come 
from different files, I believe.

If you just want to be able to use several names to refer to the same 
module then you have already had a coupe of good answers.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From gagsl-py at yahoo.com.ar  Thu Nov 16 16:29:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 18:29:23 -0300
Subject: Decimal() instead of float?
In-Reply-To: <ejh4la$l9u$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
	<1163322853.760315.51040@k70g2000cwa.googlegroups.com>
	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
	<017d01c7094b$86032a20$03000080@hendrik>
	<ejh4la$l9u$1@sea.gmane.org>
Message-ID: <7.0.1.0.0.20061116180709.03fa7640@yahoo.com.ar>

At Thursday 16/11/2006 04:40, Fredrik Lundh wrote:

>internal rowid's are best treated as pointers, though.  they're more
>like memory addresses than labels.
>
>(from a design perspective, it's not entirely obvious that it's a good
>idea to use rowid's to point *into* the database from the outside, but
>that's another story).

You could consider them like id() in python - an identifier that, 
although it's in fact a pointer, should not be dereferenced.


-- 
Gabriel Genellina
Softlab SRL  

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From john106henry at hotmail.com  Wed Nov 15 12:58:22 2006
From: john106henry at hotmail.com (John Henry)
Date: 15 Nov 2006 09:58:22 -0800
Subject: Yield
In-Reply-To: <mailman.201.1163611595.32031.python-list@python.org>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<mailman.201.1163611595.32031.python-list@python.org>
Message-ID: <1163613502.498413.209710@i42g2000cwa.googlegroups.com>

Thank you.  This is very clear.  I can see that this is useful in lots
of situations.

Fredrik Lundh wrote:
> Mateuszk87 wrote:
>
> > may someone explain "yield" function, please. how does it actually work
> > and when do you use it?
>
> it returns a value from a function without actually terminating the
> function; when the function is resumed, it'll continue to execute after
> the yield.
>
> a function that contains a yield statement is called a "generator", and
> is most often used in a for-in loop, or in other contexts that expect a
> sequence.  the loop is automatically terminated when the function
> returns in a usual way:
>
>  >>> def gen():
> ...     yield 1
> ...     yield 2
> ...     yield 3
> ...
>  >>> for item in gen():
> ...     print item
> ...
> 1
> 2
> 3
>  >>> sum(gen())
> 6
>  >>> [str(i) for i in gen()]
> ['1', '2', '3']
>
> you can also use the generator "by hand"; when you call a generator
> function, it returns a special "generator object", and then immediately
> suspends itself.  to run the generator, call its "next" method:
>
>  >>> g = gen()
>  >>> g
> <generator object at 0x00AE64E0>
>  >>> g.next()
> 1
>  >>> g.next()
> 2
>  >>> g.next()
> 3
>
> when the generator is exhausted, it raises a StopIterator exception:
>
>  >>> g.next()
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> StopIteration
>
> reference information:
>
>      http://effbot.org/pyref/yield.htm
> 
> hope this helps!
> 
> </F>



From sandravandale at yahoo.com  Tue Nov  7 19:59:29 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 7 Nov 2006 16:59:29 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
In-Reply-To: <eiddl5$qpn$1@news.albasani.net>
References: <eiddl5$qpn$1@news.albasani.net>
Message-ID: <1162947569.228388.16940@m7g2000cwm.googlegroups.com>

On Nov 2, 1:32 pm, robert <no-s... at no-spam-no-spam.com> wrote:
> I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.
>
> Interprocess communication is tedious and out of question, so I thought about simply using a more Python interpreter instances (Py_NewInterpreter) with extra GIL in the same process.

Why not use IronPython? It's up to date (unlike Jython), has no GIL,
and is cross-platform wherever you can get .NET or Mono (UNIX, macs,
windows) and you can use most any scientific libraries written for the
.NET/Mono platform (there's a lot) Take a look anyway.

-Sandra



From p.lavarre at ieee.org  Fri Nov 10 09:27:51 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 06:27:51 -0800
Subject: announce: FAQs suggested
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>
	<ej20b4$rjj$02$1@news.t-online.com>
	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>
Message-ID: <1163168871.092708.83150@f16g2000cwb.googlegroups.com>

> > > > http://effbot.org/pyfaq/suggest.htm
> > > FAQ: How do I say returns void in ctypes?
> > That's in the ctypes documentation, where it belongs.
>
> Thank you, before I never had found "Use None for void a function not
> returning anything" at:
> http://starship.python.net/crew/theller/ctypes/reference.html
>
> Now I see, that find corresponds to:
> http://docs.python.org/dev/lib/ctypes-foreign-functions.html
>
> I think this remains an FAQ, because I see void is missing from much
> more prominent places:
> http://docs.python.org/dev/lib/node452.html "Fundamental data types"
> http://docs.python.org/dev/lib/ctypes-return-types.html
>
> Finding a way to suggest improving those docs would help more than
> suggesting an FAQ, I agree.

I might have hit this brick wall while working offline, with nothing
but the doc to hand.

http://www.google.com/search?q=site%3Adocs.python.org+ctypes+void
now, if not before, does fetch that key phrase:
"Use None for void a function not returning anything"



From inq1ltd at verizon.net  Tue Nov  7 20:20:18 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Tue, 07 Nov 2006 20:20:18 -0500
Subject: Simple Tkinter problem
In-Reply-To: <200611071038.53216.inq1ltd@verizon.net>
References: <1162910114.482548.157530@f16g2000cwb.googlegroups.com>
	<200611071038.53216.inq1ltd@verizon.net>
Message-ID: <200611072020.18806.inq1ltd@verizon.net>

On Tuesday 07 November 2006 10:38, jim-on-linux 
wrote:
 Greg,

 Run the following code to see how pack_forget()
 or grid_forget() works, it makes previous
 widgets disappear but not go away.  If you call
 grid() or pack() again after using
 grid_forget() the widget returns.


 root = Tk()
 class Ktest:
     def __init__(self):
         self.Ftest1()

     def  Ftest1(self):

         try:
             self.test2.grid_forget()
         except AttributeError :
             pass
         self.test1 = Button(root, text='Push #1
                button', bg = 'yellow',
                width = 25, 
               command = self.Ftest2, height = 25)
         self.test1.grid(row=0, column=0)


     def Ftest2(self):
        self.test1.grid_forget()
        self.test2 = Button(root, text='Push #2
                        button', bg = 'green',
                          width = 15,
                         command = self.Ftest1,
                          height = 10)
        self.test2.grid(row=0, column=0)

 if __name__==  '__main__' :
     Ktest()
     mainloop()



 Maybe someone else has an idea about not
 defining a variable.

 My question is how does a budket of wires and
 screws know its a bucket of wires and screws
 unless someone tells it that it's a bucket of
 wires and screws?

jim-on-linux

http://.www.inqvista.com

>
>
>
>
>
> On Tuesday 07 November 2006 09:35,
>
> gmarkowsky at gmail.com wrote:
> > Hi all,
> >
> > I'm trying to write a GUI that will put up
> > multiple widgets in succession. My problem is
> > that each widget also contains the previous
> > widgets when they pop up. How do I
> > reinitialize the widget each time so that it
> > doesn't contain earlier ones? Actually,
> > another question I have is, is there a way to
> > set python so that it will assume any
> > undefined variable is 0 or ''? That is, I
> > have several statements like "If k > 0 then
> > so and so" and I would like it to assume k=0
> > unless I tell it otherwise. I've just been
> > defining k=0 at the start of the program but
> > it seems there should be a better way.
> >
> > Greg


From p.lavarre at ieee.org  Fri Nov 10 10:00:17 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 10 Nov 2006 07:00:17 -0800
Subject: announce: FAQs suggested
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>
	<ej20b4$rjj$02$1@news.t-online.com>
	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>
	<mailman.2034.1163169174.11739.python-list@python.org>
Message-ID: <1163170817.527911.85510@b28g2000cwb.googlegroups.com>

Thanks again for making time to comment - insights into the perspective
of the author are invaluable.  But if by chance you have time to
continue:

> > > http://effbot.org/pyfaq/suggest.htm
> > http://docs.python.org/dev/lib/ctypes-return-types.html
> A note could probably be added to this section.

Good.  Next: Is there a place on the web where we can log that
conclusion to inspire its resolution?

> > void is missing from
> > http://docs.python.org/dev/lib/node452.html "Fundamental data types"
>
> 'void' is not a type.

Help, lost me?

1)

http://msdn.microsoft.com/library/en-us/winprog/winprog/windows_data_types.asp
thinks void is a type.  That's what I was reading in parallel with the
ctypes doc, as I tried to make ctypes and the Windows kernel32.dll talk
to each other.

2)

void foo(int ii) { ii = ii; }
is a C way of saying the return type of foo is the type void, in casual
conversation among programmers.

I mean, suppose I ask you what is the return type of foo?  That is,
suppose I ask you what its ctypes restype should be?

We can answer like a C lawyer, tell me that my question is malformed,
tell me that foo returns no result, tell me that foo has no return
type, and claim that thus obviously its restype should be None, despite
the widespread string Api convention of distinguishing None from
consciously empty and not using None to mean consciously empty.

Or informally we can say the return type of foo is the type void,
because void is a type, and ctypes uses Python None to express the idea
of the void type, without adding the name c_void to tell you this.

> I don't think that this is irregular,

Have I clearly explained why defining no c_void appears irregular to me
the C-literate Python-illiterate newbie?

Maybe also relevant is my Jvm/Jni background - I'm used to seeing void
expressed there as a type, not much different than int.

Was my newbie confusion here so very unique, or do these two FAQ's
exist:
FAQ: How do I say unsigned char in ctypes?
FAQ: How do I say returns void in ctypes?

Or can we hope to improve any of:
http://starship.python.net/crew/theller/ctypes/tutorial.html
http://docs.python.org/dev/lib/node452.html "Fundamental data types"
http://docs.python.org/dev/lib/ctypes-return-types.html
?

> > That's in the ctypes documentation, where it belongs.

Thanks again for that claim.

Now also I see that returns void is defined by:
http://starship.python.net/crew/theller/ctypes/reference.html
although not by:
http://starship.python.net/crew/theller/ctypes/tutorial.html

Once upon a time, I only knew the tutorial existed, not the reference.
The tutorial includes one well-buried mention of "see the reference
manual for details", but doesn't link to what reference manual is
meant.

I remember, as a newbie, I was slow to accept that Google
site:docs.python.org shouldn't be the only thing I read to understand
the ctypes of 2.5 Python.

> ...

Thanks all for the education.

I'm clear on this now, and delighted to remove the fixme: undoc'ed
comments from my source.



From no-spam at no-spam-no-spam.invalid  Thu Nov 23 12:16:20 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 23 Nov 2006 18:16:20 +0100
Subject: What's going on here?
In-Reply-To: <hJj9h.45491$Xt5.14428@fe81.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
	<hJj9h.45491$Xt5.14428@fe81.usenetserver.com>
Message-ID: <ek4l15$912$1@news.albasani.net>

Dale Strickland-Clark wrote:
> Thanks for the answers. I am informed but I don't feel enlightened. 
> 
> It does strike me as odd that an apparently empty subclass should add extra
> function to the base class. 
> 
> Not at all obvious.

Yes. As said, there is missing a __builtin__.Object

object is not an "empty class", but the base builtin-type:

>>> isinstance(int,object)
True

built-in type instances are basically read-only because if ...


>>> (1).spam=1
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
AttributeError: 'int' object has no attribute 'spam'
>>> 


..would work, that would be very strange. 
Maybe in a mud place language like Ruby, where you can jam and scribble everywhere in the system and in builtins, such things are possible.  


I'd propose to add something trivial like


class Object(object):
   def __init__(self,_d={},**kwargs):
       kwargs.update(_d)
       self.__dict__=kwargs 
   ...

to Python. I use such empty (common) class since all time I can think of - and frequently. 
If there would be a common such Empty class in Python you'd have a lot of advantanges. From ad-hoc instances, "OO-dicts" to reliable pickling of bunches of variables etc.


Robert




From timothy at open-networks.net  Mon Nov  6 17:32:49 2006
From: timothy at open-networks.net (timmy)
Date: Tue, 07 Nov 2006 08:32:49 +1000
Subject: SPE editor slow?
In-Reply-To: <1162827834.032589.109470@b28g2000cwb.googlegroups.com>
References: <454e6f35@quokka.wn.com.au>
	<1162827834.032589.109470@b28g2000cwb.googlegroups.com>
Message-ID: <454fb79c$1@quokka.wn.com.au>

SPE - Stani's Python Editor wrote:
> timmy schreef:
> 
> 
>>hello i've been using the SPE editor on a moderately large project and
>>it's constantly pausing during editing, like it's attempting to check
>>something as i edit.
>>as you can imagine a 4 second pause every few characters is EXTREMELY
>>annoying when you just want to get some work done. i really like SPE's
>>layout and features but if it's going to be dogshit slow all the time
>>i'll have to change. please help!
> 
> 
> SPE does error syntax checking which works fine for normal sized python
> files. With these settings you can speed up SPE for larger projects:
> 1. Edit>Preferences>Editor: Check realtime with "none" (default value:
> compiler)
> 2. Edit>Preferences>Editor: Update sidebar "when clicked"
> 
> You can first try step 1, if you want SPE faster, use step 2 as well.
> 
> Stani
> 

thanks stani i actually had an incling that 2. was the real problem. 
i've got probably 200 or so clases in my project and it was pausing 
mainly when it came to names of things or a .
i changed it to on clicked and it's fine now.

it still does something else though that i'm at a loss to fix. when i 
open a file or run a script is throws up errors saying "Failed to 
display HTML document in ISO-8859-1 encoding"

i guess thats a problem with those bottom info windows?


From sjmachin at lexicon.net  Sun Nov 19 00:34:03 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 21:34:03 -0800
Subject: Reloading after from adder import * ????
References: <1163901449.418534.251060@b28g2000cwb.googlegroups.com>
Message-ID: <1163914443.703646.64080@k70g2000cwa.googlegroups.com>

Seymour wrote:
> I created a module with the DictAdder subclass as follows:
>
> class DictAdder(Adder):
>     def add(self, x, y):
>         new={}
>         for k in x.keys(): new[k]=x[k]
>         for k in y.keys(): new[k]=y[k]
>         return new
>
> At the interactive prompt I then said: from Adder import *
>
> After defining an instance of DictAdder as x=DictAdder() and trying to
> add two dictionaries, I notice a typo in DictAdder.  If I then go back
> and make a change to the DictAdder subclass I have to go through many
> steps to add two dictionaries (get the revision into active memory):
> 1. import Adder
> 2. Reload(Adder)
> 3. from Adder import *
> 4. x=DictAdder()
>
> Question: Is there an easier and quicker way to get DictAdder into
> active memory?????

This is one of the occasions where semicolons can come in handy in
Python:

import adder; reload(adder); from adder import *

Then depending on your OS and what add-on line editing kit (if any) you
are using, it should only a very small number of keystrokes to retrieve
that and execute it.

If you meant "is there a single command?", the answer is no, not AFAIK.

Having said that, you seem to have a strange idea about what classes
are for -- "self" is not used; having such a class "method" seems
pointless. All you need to do what you are doing  is a simple function,
whose body can be simply expressed in terms of dict methods:

def funnyfunc(x, y):
    """This is called a docstring; try to say what the func is doing
for you"""
    new = x.copy()
    new.update(y)
    return new

Of course that is probably not what you *want* to be doing; but you
might need to divulge what the Adder class is doing to get more help.

Hints: unlike some other languages,

(1) You don't need to have 1 module file per class; for several small
related classes (e.g. a main class and a handful of subclasses) it
makes a lot of sense to put it all in one module.

(2) To do most simple things, you don't even need to write a class at
all. For example, you can write a few hundred lines of clear
intelligible Python with very little must-recite-this-spell overhead to
do quite complicated data manipulations using only (a) built-in
functions (b) the methods of built-in types like strings, lists and
dictionaries (c) functions and classes in built-in modules (d) ditto
3rd-party modules. In Python classes usually are things that map onto
something in the real world or at least your model of that; you write
them when you need to; classes are not artificial hoops you must jump
through to do the equivalent of:
   print 2 + 2
You may end up using classes to emulate some other programming
constructs, but not yet.
Eventually you can write those 3rd party modules which are chock-full
of classes and other goodies, using them as a guide.

OK, relax, rant over :-)

HTH,
John



From rabin at rab.in  Sat Nov 25 04:38:38 2006
From: rabin at rab.in (Rabin Vincent)
Date: Sat, 25 Nov 2006 15:08:38 +0530
Subject: reading id3 tags with python
In-Reply-To: <1164386522.229372.116120@l12g2000cwl.googlegroups.com>
References: <1164328566.089711.89870@l12g2000cwl.googlegroups.com>
	<o9s9h.2927$tM1.1672@newsread1.news.pas.earthlink.net>
	<1164354948.000349.52170@m7g2000cwm.googlegroups.com>
	<1164386522.229372.116120@l12g2000cwl.googlegroups.com>
Message-ID: <c928c27e0611250138k7a0a1088j39899ac52e89b864@mail.gmail.com>

On 24 Nov 2006 08:42:02 -0800, jeff <jeffrey.aylesworth at gmail.com> wrote:
>   File "/home/jeffrey/Documents/Music/.rename/id3reader.py", line 341,
> in _interpretFlags
>     self._readExtHeader = _readExtHeader_rev3
> NameError: global name '_readExtHeader_rev3' is not defined

Add a "self." in front of _readExtHeader_rev3 on line 341 of id3reader.py,
and also in front of _readExtHeader_rev4 on line 343 and it should
probably work.

   self._readExtHeader = self._readExtHeader_rev3

Rabin


From g.brandl-nospam at gmx.net  Wed Nov 22 04:42:35 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 22 Nov 2006 10:42:35 +0100
Subject: Parsing/Splitting Line
In-Reply-To: <mailman.578.1164186611.32031.python-list@python.org>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>	<kc-dnXWhCOXEA_7YnZ2dnUVZ_hmdnZ2d@comcast.com>
	<mailman.578.1164186611.32031.python-list@python.org>
Message-ID: <ek162b$ea$1@news.albasani.net>

Fredrik Lundh schrieb:
> Noah Rawlins wrote:
> 
> 
>> I'm a nut for regular expressions and obfuscation...
>> 
>> import re
>> def splitline(line, size=4):
>>      return re.findall(r'.{%d}' % size, line)
>> 
>>  >>> splitline("helloiamsuperman")
>> ['hell', 'oiam', 'supe', 'rman']
> 
> there are laws against such use of regular expressions in certain 
> jurisdictions.

... and in particularly bad cases, you will be punished by Perl
not less than 5 years ...

Georg


From steve at holdenweb.com  Tue Nov  7 08:37:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 08:37:26 -0500
Subject: PIL: match for ImageMagick's display -ping
In-Reply-To: <87ac33obzg.fsf@wilson.homeunix.com>
References: <87ac33obzg.fsf@wilson.homeunix.com>
Message-ID: <eiq24e$mbv$1@sea.gmane.org>

Torsten Bronger wrote:
> Hall?chen!
> 
> I have to extract the dimensions of many bitmap files.  An old Bash
> script did it with ImageMagick's "display -ping ...".  "-ping" means
> that it extracts the image dimensions efficiently.  I suspect it
> simply doesn't read the image itself.
> 
> Now the Bash script has been transformed into Python+PIL.  Is there
> a way to get the dimensions equally efficient here, or does the PIL
> even do this optimisation implicitly since I never access the image
> bitmap itself?
> 
  >>> import Image
  >>> i = Image.open("Hello.png")
  >>> i.size
(142, 23)
  >>>

The image data isn't read until an operation requires it, so this is an 
efficient way to get its size.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jackson at hotmail.com  Tue Nov  7 19:02:21 2006
From: jackson at hotmail.com (Jackson)
Date: Tue, 07 Nov 2006 16:02:21 -0800
Subject: Vector Space Membership
Message-ID: <eir6qd$fqt$1@skeeter.ucdavis.edu>

Is there a package which provides a VectorSpace object defined over the
Reals, Rationals, Complex, etc?  It'd be nice to test membership.


From gabor at nekomancer.net  Fri Nov 17 13:27:57 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 19:27:57 +0100
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
Message-ID: <9b965$455dff2b$59ad1aca$6791@news.flashnewsgroups.com>

walterbyrd wrote:
> I think I have read somewhere that using Python to develop
> web-applications requires some restarting of the Apache server, whereas
> PHP does not.
> 

first thing... there are many many ways how to run a python-apache web 
application..

- mod_python
- cgi
- fastcgi
- sci
- proxy

also the same way, for php:
- mod_php
- fastcgi
- cgi
- (maybe something more, i'm not much experienced with php)

so first you should tell us which python-solution would you like to 
compare to which php-solution..


gabor


From inq1ltd at verizon.net  Fri Nov 24 13:49:35 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 24 Nov 2006 13:49:35 -0500
Subject: Access to variable from external imported module
In-Reply-To: <200611241320.32735.inq1ltd@verizon.net>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<200611241301.05557.inq1ltd@verizon.net>
	<200611241320.32735.inq1ltd@verizon.net>
Message-ID: <200611241349.36061.inq1ltd@verizon.net>

On Friday 24 November 2006 13:20, jim-on-linux 
wrote:
> On Friday 24 November 2006 13:01, jim-on-linux
>
> wrote:
> > On Friday 24 November 2006 03:30, John Machin
> >
> > wrote:
> > > jim-on-linux wrote:
> > > > GinTon,
> > > >
> > > > I think this is what you want.
> > > >
> > > >
> > > > class Kdoi:
> > >
> > > Is that a typo?
> >
> >        No, it's a style. life seems to be
> > easier to me if one is consistent, all my
> > classes begin with K.
>
> Sorry, Kdoi should be Kod
Sorry again Kdoi should be Kdo 
(Haste makes waste.)
>
> > > >    def __init__(self) :
> > > >        self.Fdo()
> > >
> > > What is all this K and F stuff?
> >
> >    It's my style. life seems to be easier  to
> > me if one is consistent all my function begin
> > with F.
> >
> > I started doing things like this when the
> > only way to debug was to read each line of
> > code and try to figgure out if it was the
> > problem. They are my personal sign posts.
> >
> > > >    def Fdo(self):
> > > >
> > > >
> > > >      searchterm = 'help'
> > > >      print searchterm     #local
> > > >
> > > >      self.searchterm = searchterm
> > > >      print self.searchterm #used inside
> > > > the class
> > > >
> > > >      Kdo.searchterm = searchterm   #<<<<
> > > >      print Kdo.searchterm #used outside
> > > > the class Kdomore()
>
> the line above should be Kdomore(), not class
> Kdomore() (For the technocrats)
>
> > > > class Kdomore(Kdo):
> > > >      def __init__(self) :
> > > >          self.Fdomore()
> > > >
> > > >      def Fdomore(self):
> > > >          searchterm =  Kdo.searchterm   #
> > > > <<<< print searchterm
> > >
> > > It's not apparent what the print statements
> > > are for -- are they part of an attempt to
> > > debug your code?
> >
> > print shows the results wherever a print
> > statement turns up the results = 'help' .
> > I didn't run the code, and it has it has a
> > coding error but if removed, the results
> > should be;
> >
> >    searchterm = 'help'
> >    self.searchterm = 'help'
> >    Kdo.searchterm = 'help'
> >
> >    Sound silly but many people have trouble
> > with getting a variable from here to there in
> > their code. This shows that it can be done
> >
> > > What gives you the idea that this is what
> > > the OP wants or needs?
> >
> > If I remember right,  he refrased  his first
> > question and asked a second one.
> > Sometimes people don't take the time to write
> > correctly, the questions that are really in
> > their mind. So I guessed.  If Im wrong, he
> > will ignore it.  If I'm right, he will use
> > it.
> >
> > Also, I have found that other will latch on
> > to the ideas presented  in these email
> > responses. And they will use them, even
> > though the response was not exactly what the
> > original emailer wanted.
> >
> > And, I sometimes I do use print statements to
> > debug, I have used other ways but on linux, I
> > prefer a print statement.
>
 jim-on-linux
 http://www.inqvista.com


From gabrielg_laburando at yahoo.com.ar  Wed Nov  8 16:16:14 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Wed, 08 Nov 2006 18:16:14 -0300
Subject: is this the right way to do subclasses?
In-Reply-To: <45523133$0$14421$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
	<eitajt$bsk$03$1@news.t-online.com>
	<45523133$0$14421$c3e8da3@news.astraweb.com>
Message-ID: <7.0.1.0.0.20061108181416.05a5b8a8@yahoo.com.ar>

At Wednesday 8/11/2006 16:33, John Salerno wrote:

> > class Character(object):
> >     def __init__(self, name, strength, dexterity, intelligence):
> >         self.name = name
> >         self.health = 10
> >         self.strength = strength
> >         self.dexterity = dexterity
> >         self.intelligence = intelligence
> >         self.fix_attributes()
> >
> > class Fighter(Character):
> >     def fix_attributes(self):
> >         self.health += 2
> >         self.strength += 1
> >
> > You may need a no-op implementation of fix_attributes() in the Character
> > class.
> >
> > Peter
>
>But how does this take care of the initialization of the stats? I won't
>be able to use Fighter to create a character without doing everything in
>Character, right?

Just try and see! :)
(Python is not Java, thanks Guido!)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Fri Nov  3 15:11:16 2006
From: sjmachin at lexicon.net (John Machin)
Date: 3 Nov 2006 12:11:16 -0800
Subject: Converting Microsoft Works databases.... *shudder*
In-Reply-To: <1162568409.144421.262160@e3g2000cwe.googlegroups.com>
References: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>
	<1162568409.144421.262160@e3g2000cwe.googlegroups.com>
Message-ID: <1162584676.177335.307920@i42g2000cwa.googlegroups.com>


GISDude wrote:
> Mike,
> I totally forgot that MS Works was out there. Haven't used that one in
> about 6 or 7 years. Honestly, your best bet is to convert to .csv or
> some delimited .txt file. Once that is done, all your rows/columns will
> be "nice and neat" .

"Nice and neat"? What is that supposed to mean?

Converting to a CSV or TXT format loses all meta-information about data
types, sizes, and precision. It also runs the risk of mangling the
actual data. The OP should take the DBF / ODBC route as suggested by
others.



From python.list at tim.thechases.com  Fri Nov 17 13:32:38 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 17 Nov 2006 12:32:38 -0600
Subject: remove a list from a list
In-Reply-To: <ejkv1u$ajf$1@sea.gmane.org>
References: <ejkv1u$ajf$1@sea.gmane.org>
Message-ID: <455E0046.1090005@tim.thechases.com>

> I have a list like
>    e = ['a', 'b', 'e']
> and another list like
>    l = ['A', 'a', 'c', 'D', 'E']
> I would like to remove from l all the elements that appear in e 
> case-insensitive. That is, the result would be
>    r = ['c', 'D']
> 
> What is a *nice* way of doing it?


Well, it's usually advantageous (for speed purposes) to make a 
set out of your lookup data.  One can then use it for a list 
comprehension something like

 >>> e = ['a', 'b', 'e']
 >>> l = ['A', 'a', 'c', 'D', 'E']
 >>> s = set(e)
 >>> [x for x in l if x.lower() not in s]
['c', 'D']

This presumes that "e" is all lowercase letters.  Otherwise, you 
can force it with

	s = set(c.lower() for c in e)

-tkc








From fredrik at pythonware.com  Mon Nov 13 14:46:58 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 20:46:58 +0100
Subject: Python memory usage
In-Reply-To: <1163446161.594913.269050@b28g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>
	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>
Message-ID: <ejai3i$peg$1@sea.gmane.org>

velotron wrote:

> x=range(10000000)
> x=None
> 
> The problem exists for floats too, so for a less contrived example:
> 
> x=[random.weibullvariate(7.0,2.0) for i in xrange(10000000)]
> x=None
> 
> Both leave the Python process bloated in my environment.   Is this
> problem a good candidate for the FAQ?

http://effbot.org/pyfaq/why-doesnt-python-release-the-memory-when-i-delete-a-large-object

</F>



From stargaming at gmail.com  Sun Nov  5 11:28:05 2006
From: stargaming at gmail.com (Stargaming)
Date: Sun, 05 Nov 2006 17:28:05 +0100
Subject: forwarding *arg parameter
In-Reply-To: <6pn3h.125$7b6.98@read3.inet.fi>
References: <6pn3h.125$7b6.98@read3.inet.fi>
Message-ID: <eil3em$2u4f$1@ulysses.news.tiscali.de>

Tuomas schrieb:
>  >>> def g(*arg):
> ...     return arg
> ...
>  >>> g('foo', 'bar')
> ('foo', 'bar')
>  >>> # seems reasonable
> ...
>  >>> g(g('foo', 'bar'))
> (('foo', 'bar'),)
>  >>> # not so good, what g should return to get rid of the outer tuple
> 
> TV
Use the following then:
 >>> g(*g('foo', 'bar'))
('foo', 'bar')

Otherwise, you would have to check if arg is a 1-tuple consisting of a 
tuple and "strip" it out then.

e.g.
 >>> def g(*arg):
...  return arg[0] if isinstance(arg[0], tuple) else arg
...
 >>> g('foo', 'bar')
('foo', 'bar')
 >>> g(g('foo', 'bar'))
('foo', 'bar')


From li.yun.bin at gmail.com  Sat Nov 25 23:10:22 2006
From: li.yun.bin at gmail.com (YunBin Lee)
Date: 25 Nov 2006 20:10:22 -0800
Subject: Return float problem.
In-Reply-To: <1164510774.952205.312320@14g2000cws.googlegroups.com>
References: <1164467735.644775.289030@m7g2000cwm.googlegroups.com>
	<1164481894.887091.196160@l39g2000cwd.googlegroups.com>
	<1164510774.952205.312320@14g2000cws.googlegroups.com>
Message-ID: <1164514222.440910.261760@h54g2000cwb.googlegroups.com>

Hello john.
I solve it by add '#include "example.h"' into wrap.c, recompiled all
c-sources, and it works on the right way!

Content of example.h:
========== example.h =========
#ifndef __EXAMPLE_H__
#define __EXAMPLE_H__

double fact(double n);

#endif
========== end example.h =========

Anyway, Thanks for you answer again!

On 11?26?, ??11?12?, "YunBin Lee" <li.yun.... at gmail.com>
wrote:
> John, Thanks for your help!
>
> > Did you notice that the garbage is a whole number? Why? Because you
> > have been (more or less) plucking ints out of some arbitrary place on
> > the stack, floating them, and printing them.I don't know how to solve it (or the right way), could you give me some
> examples?



From tim.hochberg at ieee.org  Tue Nov 28 15:55:54 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Tue, 28 Nov 2006 13:55:54 -0700
Subject: Simple text parsing gets difficult when line continues to next
	line
In-Reply-To: <1164743287.835802.205540@h54g2000cwb.googlegroups.com>
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
	<1164743287.835802.205540@h54g2000cwb.googlegroups.com>
Message-ID: <eki7p9$2kv$1@sea.gmane.org>

John Machin wrote:
> Jacob Rael wrote:
>> Hello,
>>
>> I have a simple script to parse a text file (a visual basic program)
>> and convert key parts to tcl. Since I am only working on specific
>> sections and I need it quick, I decided not to learn/try a full blown
>> parsing module. My simple script works well until it runs into
>> functions that straddle multiple lines. For example:
>>
>>   Call mass_write(&H0, &HF, &H4, &H0, &H5, &H0, &H6, &H0, &H7, &H0,
>> &H8, &H0, _
>>                 &H9, &H0, &HA, &H0, &HB, &H0, &HC, &H0, &HD, &H0, &HE,
>> &H0, &HF, &H0, -1)
>>
>>
>> I read in each line with:
>>
>> for line in open(fileName).readlines():
>>
>> I would line to identify if a line continues (if line.endswith('_'))
>> and concate with the next line:
>>
>> line = line + nextLine
>>
>> How can I get the next line when I am in a for loop using readlines?
> 
> Don't do that. I'm rather dubious about approaches that try to grab the
> next line on the fly e.g. fp.next(). Here's a function that takes a
> list of lines and returns another with all trailing whitespace removed
> and the continued lines glued together. It uses a simple state machine
> approach.

I agree that mixing the line assembly and parsing is probably a mistake 
although using next explicitly is fine as long as your careful with it. 
For instance, I would be wary to use the mixed for-loop, next strategy 
that some of the previous posts suggested. Here's a different, 
generator-based implementation of the same idea that, for better or for 
worse is considerably less verbose:

def continue_join_2(linesin):
     getline = iter(linesin).next
     while True:
         buffer = getline().rstrip()
         try:
             while buffer.endswith('_'):
                 buffer = buffer[:-1] + getline().rstrip()
         except StopIteration:
             raise ValueError("last line is continued: %r" % line)
         yield buffer

-tim

[SNIP]



From michael.pearmain at tangozebra.com  Tue Nov 28 07:08:56 2006
From: michael.pearmain at tangozebra.com (Mike P)
Date: 28 Nov 2006 04:08:56 -0800
Subject: SAX2 Download
In-Reply-To: <mailman.800.1164714010.32031.python-list@python.org>
References: <1164713027.460945.252580@n67g2000cwd.googlegroups.com>
	<mailman.800.1164714010.32031.python-list@python.org>
Message-ID: <1164715736.001449.281130@l12g2000cwl.googlegroups.com>


Fredrik Lundh wrote:
> Mike P wrote:
>
> > Does anyone know where i can download acopy of the SAX2 module?
>
> the built-in xml.sax module implements the SAX 2 protocol, if that's
> what you're looking for:
>
>      http://docs.python.org/lib/module-xml.sax.html
> 
> </F>

Perfect thanks



From inq1ltd at verizon.net  Thu Nov 23 18:37:37 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 23 Nov 2006 18:37:37 -0500
Subject: Access to variable from external imported module
In-Reply-To: <1164319761.451409.196660@j44g2000cwa.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
Message-ID: <200611231837.37920.inq1ltd@verizon.net>



GinTon,

I think this is what you want.


class Kdoi:
? ?def __init__(self) : ? ?
? ? ? ?self.Fdo()

? ?def Fdo(self):

     searchterm = 'help'
     print searchterm     #local 

? ? ?self.searchterm = searchterm
? ? ?print self.searchterm #used inside the class

? ? ?Kdo.searchterm = searchterm   #<<<<
? ? ?print Kdo.searchterm #used outside the class
     Kdomore()


? ? 
class Kdomore(Kdo):
     def __init__(self) :    
         self.Fdomore()

     def Fdomore(self):
         searchterm =  Kdo.searchterm   # <<<<
         print searchterm    



jim-on-linux
http://www.inqvista.com








On Thursday 23 November 2006 17:09, GinTon wrote:
> Sorry, I mean access to local variable from a
> method
>
> import module
> method(value)
>
> I would to access to values that are created
> locally in that method
>
> Fredrik Lundh ha escrito:
> > GinTon wrote:
> > > How to access to a variable (that value is
> > > not returned) from a module imported?
> > > And the variable is set at the
> > > module-level.
> >
> >    import module
> >    print module.variable
> >
> > (have you read the Python tutorial?)
> >
> > </F>


From michels at mps.mpg.de  Fri Nov 17 02:59:40 2006
From: michels at mps.mpg.de (Helmut Michels)
Date: Fri, 17 Nov 2006 08:59:40 +0100
Subject: [ANN] Data Plotting Library DISLIN 9.1
Message-ID: <ejjq5g$1top$3@gwdu112.gwdg.de>

Dear Python users,

I am pleased to announce version 9.1 of the data plotting software
DISLIN.

DISLIN is a high-level and easy to use plotting library for
displaying data as curves, bar graphs, pie charts, 3D-colour plots,
surfaces, contours and maps. Several output formats are supported
such as X11, VGA, PostScript, PDF, CGM, WMF, HPGL, TIFF, GIF, PNG,
BMP and SVG.

The software is available for several C, Fortran 77 and Fortran 90/95
compilers. Plotting extensions for the interpreting languages Perl,
Python and Java are also supported for the most operating systems.

DISLIN distributions and manuals in PDF, PostScript and HTML format
are available from the DISLIN home page

      http://www.dislin.de

and via FTP from the server

      ftp://ftp.gwdg.de/pub/grafik/dislin

All DISLIN distributions are free for non-commercial use. Licenses
for commercial use are available from the site http://www.dislin.de.

Regards,

  -------------------
   Helmut Michels
   Max Planck Institute for
   Solar System Research               Phone: +49 5556 979-334
   Max-Planck-Str. 2                   Fax  : +49 5556 979-240
   D-37191 Katlenburg-Lindau           Mail : michels at mps.mpg.de


From python.list at tim.thechases.com  Fri Nov 17 14:39:57 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 17 Nov 2006 13:39:57 -0600
Subject: remove a list from a list
In-Reply-To: <ejl2re$ns3$1@sea.gmane.org>
References: <ejkv1u$ajf$1@sea.gmane.org>	<455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>	<455E0A20.9000509@tim.thechases.com>
	<ejl2re$ns3$1@sea.gmane.org>
Message-ID: <455E100D.8030100@tim.thechases.com>

> Yeah, I ended up doing a similar kind of loop. That is pretty messy.
> 
> Is there any other way?

I've already provided 2 (or 3 depending on how one counts) 
solutions, each of which solve an interpretation of your original 
problem, neither of which involve more than 3 lines of fairly 
clean code.  Perhaps a little more context regarding what you 
*want* to do would help.  However, I suspect that answer is 
"there is no *cleaner* way to do it".

Unless you're modifying an existing list that is referenced 
elsewhere, the reassignment (l = [x for x in l ...]) solution 
should work just fine.  Thus, unless you have a situation akin to:

	g = l
	l = [x for x in l if x.lower() not in s]
	assert(thing_from_s not in g)

then just reassign "l".  If not, use the loop.  It's that easy 
and clean.  Don't try to opaquify it by collapsing it further. 
Perhaps, if your loop is messy, use my clean loop suggestion.

-tkc





From wiggly at wiggly.org  Tue Nov 14 12:39:57 2006
From: wiggly at wiggly.org (Nigel Rantor)
Date: Tue, 14 Nov 2006 17:39:57 +0000
Subject: modules and generated code
In-Reply-To: <ejcq59$920$00$1@news.t-online.com>
References: <mailman.146.1163514956.32031.python-list@python.org>	<ejckue$ns2$01$1@news.t-online.com>	<mailman.150.1163517249.32031.python-list@python.org>
	<ejcq59$920$00$1@news.t-online.com>
Message-ID: <4559FF6D.8030105@wiggly.org>

Peter Otten wrote:
> Nigel Rantor wrote:
> 
>> Peter Otten wrote:
>>> Nigel Rantor wrote:
> 
>>>> So, if I have a tool that generates python code for me (in my case,
>>>> CORBA stubs/skels) in a particular package is there a way of placing my
>>>> own code under the same package hierarchy without all the code living in
>>>> the same directory structure.
> 
>>> http://docs.python.org/lib/module-pkgutil.html
> 
>> Yep, looks like that should work, but it doesn't. :-/
>>
>> Do you have any idea whether other __init__.py scripts from the same
>> logical module will still be run in this case?
> 
> I don't think it will.

Yeah, I am getting that impression. Gah!

>> The generated code uses its init script to pull in other code.
> 
> You could invoke it explicitly via 
> 
> execfile("/path/to/generated/package/__init__.py") 
> 
> in the static package/__init__.py.

Hmm, yes, that works. It's not pretty though, it seems to be finding the 
file relative to the current directory, I suppose writing a bit of code 
that figures out where this package is located and modifying it won't be 
too hard.

And, at the risk of being flamed or sounding like a troll, this seems 
like something that should be easy to do...other languages manage it 
quite neatly. Up until this point I was really liking my exposure to 
Python :-/

I wonder if there is any more magic that I'm missing, the thing is the 
pkgutil method looks exactly like what I want, except for not executing 
the additional __init__.py files in the added directories.

Thanks for the help so far Peter, if anyone has a prettier solution then 
I'm all ears.

Cheers,

   n







From cginboston at hotmail.com  Wed Nov  8 10:37:19 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Wed, 08 Nov 2006 15:37:19 GMT
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <eistaq$m7u$1@panix3.panix.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
Message-ID: <4551FA0F.4000202@hotmail.com>

Aahz wrote:
> In article <1162997345.277966.31860 at h48g2000cwc.googlegroups.com>,
> Beliavsky <beliavsky at aol.com> wrote:
>> If this is supposed to justify using bad language in a public forum,
>> it is poorly reasoned. Having heard "f***" does not mean they were not
>> annoyed. 100% of people have seen trash on the street, but that does
>> not justify littering. If a group of people don't mind profanity, there
>> is no harm in their swearing to each other. But Usenet is read by a
>> wide range of people, and needlessly offending some of them is wrong.
>> The OP used "f******" just for emphasis. English is a rich language,
>> and there are better ways of doing that.
> 
> Oh, gimme a fucking break.  Do a simple Gooja search to find out how
> often people already use "fuck" around here.  I think you're the one who
> needs to justify your position.

Let me recommend something: take this thread off line. First, if you
have an issue with the language, talk to the person via email. Secondly
let's not let this get out of hand. All opinions are personal. Only one
really matters in this group: it is supposed to be about PYTHON. Get it?

Chaz


From jameshcunningham at gmail.com  Thu Nov 16 13:22:33 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Thu, 16 Nov 2006 13:22:33 -0500
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
	<mailman.243.1163673962.32031.python-list@python.org>
	<2006111607574875249-jameshcunningham@gmailcom>
	<1163699165.847310.285630@e3g2000cwe.googlegroups.com>
Message-ID: <2006111613223375249-jameshcunningham@gmailcom>

On 2006-11-16 12:46:05 -0500, "walterbyrd" <walterbyrd at iname.com> said:

> 
> James Cunningham wrote:
> 
>> Nope. It disproves your assertion that "certainly all of the lower
>> priced hosters" use Apache 1.3.
> 
> Okay, where can I get Python and Apache 2.X for $10 a year?

Frankly, I can't find *anybody* who advertises hosting for <= $10 a 
year - the cheapeast I can find is $18 - and such a plan would be too 
limited for me to consider anyway.

But with easily-available promotional codes, you can pay less than that 
at least for Dreamhost, which offers Apache 2.x and Python 2.4. I 
consider it low-cost hosting, but YMMV.

Best
James



From luc.saffre at gmail.com  Thu Nov  9 20:02:57 2006
From: luc.saffre at gmail.com (luc.saffre at gmail.com)
Date: 9 Nov 2006 17:02:57 -0800
Subject: comparing Unicode and string
In-Reply-To: <pan.2006.10.23.10.15.24.383843@gmx.net>
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>
	<pan.2006.10.23.10.15.24.383843@gmx.net>
Message-ID: <1163120577.369133.279080@h48g2000cwc.googlegroups.com>

Marc 'BlackJack' Rintsch wrote:
> Why?  Python strings are *byte strings* and bytes have values in the range
> 0..255.  Why would you restrict them to ASCII only?

Because getting an exception when comparing a string with a unicode
string is irritating.

But I don't insist on my PEP. The example just shows just another
pitfall with Unicode and why I'll advise to any beginner: Never write
text constants that contain non-ascii chars as simple strings, always
make them Unicode strings by prepending the "u".

Luc



From john106henry at hotmail.com  Sun Nov 12 12:51:44 2006
From: john106henry at hotmail.com (John Henry)
Date: 12 Nov 2006 09:51:44 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <_ss5h.372$Nv3.369@read3.inet.fi>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
	<1163139352.206221.213180@m73g2000cwd.googlegroups.com>
	<1163141290.868726.11330@h48g2000cwc.googlegroups.com>
	<43hal2p6ep7vds2nl55uqil7v7i3guncl2@4ax.com>
	<1163277168.079436.65120@e3g2000cwe.googlegroups.com>
	<_ss5h.372$Nv3.369@read3.inet.fi>
Message-ID: <1163353904.569673.80790@f16g2000cwb.googlegroups.com>

Nice example.


Jussi Salmela wrote:
> John Henry wrote:
> > BTW: I did a search and found the testnotebook example from:
> >
> > http://prdownloads.sourceforge.net/pythoncard/testNotebook.zip?download
> >
> > and tried it out.  There is one error in the widget.py that I have to
> > get around.  Changed from:
> >
> >         canvas.setFillColor('gray')
> >
> > to:
> >
> >         try:
> >             canvas.setFillColor('gray')
> >         except:
> >             pass
> >
> > and then ran it.   Works!
> >
> > So, yes, you can do Notebook in Python.  I believe what they are saying
> > is that Notebook isn't supported fully (yet) in the resourceeditor.
>
> It's true that the notebook and grid components of wxPython are not
> completely integrated into PythonCard but they can still be used quite
> easily once you figure out how.
>
> The process of figuring out can be made easier by a working example. The
> real life application Blood Pressure Monitor
>
> http://personal.inet.fi/cool/operator/BPMDownload.html
>
> can be used as an example of using the notebook, grid and htmlwin
> widgets in PythonCard.
>
> I use this application to input the pressure values I've registered with
> my own meter and to produce a PDF page with PyChart to hand to my doctor
> to inspect when I visit him twice a year.
>
> Cheers,
> Jussi
> 
> --
> Jussi Salmela
> http://personal.inet.fi/cool/operator/



From tjreedy at udel.edu  Wed Nov 22 14:52:28 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 22 Nov 2006 14:52:28 -0500
Subject: gopherlib deprecated in 2.5
References: <1164189280.934651.290790@m7g2000cwm.googlegroups.com>
Message-ID: <ek29pp$jj0$1@sea.gmane.org>


"Szabolcs Nagy" <nszabolcs at gmail.com> wrote in message 
news:1164189280.934651.290790 at m7g2000cwm.googlegroups.com...
> I've just seen that gopherlib is deprecated in python 2.5
> http://docs.python.org/lib/module-gopherlib.html
>
> we still use this protocol (though there are only few working gopher
> servers are left on the net)
>
> My friend just wrote a standard compliant gopher server (pygopherd had
> some problems oslt) and it's much better for hierarchycal content
> sharing than the http (which is overrated and misused in this respect).
>
> So i don't really understand why would one remove it from python. It's
> a friendly, tiny, simple, standard protocol.

The devolopers thought that perhaps gopherlib was unused in new or 
updated-to-new releases code.  Even if it is by a few, there is still the 
question of whether gopherlib should be in the stdlib in preference to 
modules that would be useful to more people or whether it should be a 
downloadable module at PyPI.  The latter would require someone to take 
ownership of it.

You might consider posting a note on py dev (easily accessible via gmane) 
to let them know there is at least one current user.

Terry Jan Reedy





From enleverlesX.XmcX at XmclaveauX.com  Sat Nov 18 02:04:44 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Sat, 18 Nov 2006 08:04:44 +0100
Subject: Pb subprocess 
References: <455e2c24$0$5090$ba4acef3@news.orange.fr>
Message-ID: <455eb0a8$0$27394$ba4acef3@news.orange.fr>

Solved.

Thank to Amaury.

Solution :
change (in register), Command Processor, for to force using of "CMD /U/C"
Then, STDOUT is in utf-16  (but win-console stay in cp850)

HGD

Michel Claveau







From robert.kern at gmail.com  Sat Nov 25 02:53:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 25 Nov 2006 01:53:30 -0600
Subject: The Python Papers Edition One
In-Reply-To: <4567ee43$1@news.unimelb.edu.au>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>	<7xodqyn5kd.fsf@ruckus.brouhaha.com>	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>	<mailman.703.1164432447.32031.python-list@python.org>
	<4567ee43$1@news.unimelb.edu.au>
Message-ID: <ek8sqa$h8p$1@sea.gmane.org>

Maurice LING wrote:
> As Steven mentioned -- anything you can read is copyrighted. The 
> difference is whether is the copyright effective or enforceable. What do 
> I mean by this? Without copyright, there will not be plagarism. Ask 
> yourself this question, can you copy William Shakespeare's MacBeth and 
> submit it as a literary work for a Master of Literary Arts degree? I 
> believe the candidate will be expelled from university. William 
> Shakespeare's MacBeth is still copyrighted work but not "enforceable" 
> because it is pre-1900's work and the author had been dead for more than 
> 50 years. Similarly, works in public domain are still copyrighted -- 
> academically, using work in public domain without attribution (giving 
> credits in the form of citations) is still plagarism.
> 
> This means that everything you had read since the days of "ABC..." are 
> copyrighted. That includes all codes you've seen in colleges etc etc. I 
> am afraid that to avoid copyright altogether, as far as your work is 
> concerned, you might have to seclude yourself in some pacific islands 
> and re-discover mathematics and computer science all over again from 1 + 
> 1 = 2, and 2 + 1 = 3, and so on. Even so, patents will still get you at 
> the end.
> 
> In copyright, there is fair use. There is no way of avoiding it totally 
> -- how many ways are there to write a list comprehension?
> 
> Copyright just says attribute credits when you use someone else's work 
> within the limits of fair use; otherwise you might have to pay for it in 
> the form of a licence, subject to the copyright owner. I believe you've 
> done all these in college when writing your essays.
> 
> I believe in most cases, a simple declaration like "This function is a 
> re-implementation (or adaptation) of that found in <some periodical's 
> title, year, and page number>" will suffice.
> 
> Have you not read "The Python Cookbook", in book form or from the 
> website? How do you attribute credits when you are using the codes?

I'm not going to go through this point by point, but nearly everything you've
said is wrong.

-- 
Robert Kern

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



From markscottwright at gmail.com  Wed Nov 22 20:56:02 2006
From: markscottwright at gmail.com (markscottwright)
Date: 22 Nov 2006 17:56:02 -0800
Subject: Abelson and Python
In-Reply-To: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
Message-ID: <1164246961.951287.132170@j44g2000cwa.googlegroups.com>


bearophileHUGS at lycos.com wrote:
> While studying the SICP video lectures I have to twist my mind some to
> completely understand the lessons. I implement the programs shown there
> in both Python and Scheme, and I find the Python implementations
> simpler to write (but it's not a fair comparison because I know very
> little Scheme still).
>
> Now some things are changing:
> http://lambda-the-ultimate.org/node/1840
>
> >The MIT is going to change its curriculum structure that was famous for teaching Scheme in introductory courses. One force behind the reform is no one else than Harold Abelson, famous for his marvelous Scheme opus SICP.<
> >The first four weeks of C1 will be a lot like the first four weeks of 6.001, Abelson said. The difference is that programming will be done in Python and not Scheme.<

I am shocked by this.  I love Python as much as the next guy, but I
just don't see how SICP can be done in Python.  Chapters 1-3, sure.
But chapter 4 has you writing a Scheme interpreter in Scheme, and
chapter 5 has you writing a Scheme compiler in Scheme.  I don't see how
that can be done in Python - certainly not in one chapter of a
textbook.  Am I to believe that students will be writing a Python
metacircular evaluator?  If it were that easy, the PyPy guys would be
done by now.



From ghidox at gmail.com  Wed Nov 15 02:00:34 2006
From: ghidox at gmail.com (Ghido)
Date: 14 Nov 2006 23:00:34 -0800
Subject: wxpython - wxtoolbar font size
In-Reply-To: <mailman.172.1163538866.32031.python-list@python.org>
References: <1163519398.369070.165890@i42g2000cwa.googlegroups.com>
	<mailman.172.1163538866.32031.python-list@python.org>
Message-ID: <1163574034.539682.249820@f16g2000cwb.googlegroups.com>

Thanks for your reply but i can't change the font of 'New' label. but
it is a linux problem or is a wxpython problem?

Ghido



From theller at ctypes.org  Tue Nov  7 15:39:02 2006
From: theller at ctypes.org (Thomas Heller)
Date: Tue, 07 Nov 2006 21:39:02 +0100
Subject: ctypes, python 2.5, WinFunctionType and _as_parameter_
In-Reply-To: <1162854805.644830.138280@m7g2000cwm.googlegroups.com>
References: <1162854805.644830.138280@m7g2000cwm.googlegroups.com>
Message-ID: <4550EEE6.4050207@ctypes.org>

gerard5609 at yahoo.fr schrieb:
> Hello,
> 
> how to get at the function address of a WinFunctionType ctypes object ?
> With ctypes 1.0, I used just myfunc._as_parameter_ and all was well.
> With ctypes 1.0.1, that ships with python 2.5, WinFunctionType has no
> longer an _as_parameter_ attribute

I think the easiest way is to cast to function to a void pointer and
get the value of that.  Something like:

cast(function, c_void_p).value

> Where in the ChangeLog and the documentation is explained how to deal
> with this change ?

Hm, I considered _as_parameter_ an implementation detail ;-)

> Thanks in advance,
> 
> Gerard
> 
Thomas



From walterbyrd at iname.com  Tue Nov 21 18:03:57 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 21 Nov 2006 15:03:57 -0800
Subject: Trying to understand Python objects
Message-ID: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>

Reading "Think Like a Computer Scientist" I am not sure I understand
the way it describes the way objects work with Python.

1) Can attributes can added just anywhere? I create an object called
point, then I can add attributes any time, and at any place in the
program?

2) Are classes typically created like this:

class Point:
  pass

Then attributes are added at some other time?

3) What is with the __underscores__ ??

4) Are parameters passed to an class definition?

class Whatever(params):
   pass

I sort-of understand the way objects work with PHP. With PHP, the
classes are defined in one place - sort of like a function. To me, that
makes more sense.



From fredrik at pythonware.com  Wed Nov 29 13:08:58 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 19:08:58 +0100
Subject: pickle and infinity
In-Reply-To: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
Message-ID: <ekkibq$4pr$1@sea.gmane.org>

Bart Ogryczak wrote:

> I?ve got this problem with pickle, it seems it doesn?t handle
> correctly infinite values (nor does Python return overflow/underflow
> error).

Python 2.X relies on the C library to serialize floats, and, as you've 
noticed, some C libraries can produce values that they themselves cannot 
read.

</F>



From kib2 at free.fr  Sun Nov 19 08:49:56 2006
From: kib2 at free.fr (tool69)
Date: Sun, 19 Nov 2006 14:49:56 +0100
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <mailman.456.1163938028.32031.python-list@python.org>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>	<20061118190822.GB19739@phd.pp.ru>	<20061118192248.GB29614@58sirius016.dc.ukrtel.net>
	<mailman.456.1163938028.32031.python-list@python.org>
Message-ID: <45605f00$0$5732$426a74cc@news.free.fr>

Sorry, but did someone knows if Pida works under Windows ?
Thanks.


From fredrik at pythonware.com  Mon Nov 20 04:05:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 10:05:51 +0100
Subject: a few extensions for the itertools
In-Reply-To: <45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <ejrr5g$9dm$1@sea.gmane.org>

Mathias Panzenboeck wrote:

> No, because the builtin sum can't handle iterables other than lists.
 > Or dose it? Hmm, maby it dose since any new version and I didn't
 > mention it.

sum() was added in 2.3, and has always supported arbitrary iterables.

</F>



From fredrik at pythonware.com  Sun Nov 19 07:50:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 13:50:50 +0100
Subject: syntax error in sum(). Please explicate.
In-Reply-To: <4sb0i0Furjq2U2@mid.individual.net>
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>	<7xbqn45qh7.fsf@ruckus.brouhaha.com>
	<4sb0i0Furjq2U2@mid.individual.net>
Message-ID: <ejpjvb$faa$1@sea.gmane.org>

Bjoern Schliessmann wrote:

> Are generator comprehensions and generator expressions the same?

the documentation uses the word "expression", not comprehension.

</F>



From gagsl-py at yahoo.com.ar  Thu Nov 16 21:21:57 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 23:21:57 -0300
Subject: Printing/writing an integer to a file
In-Reply-To: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.co
 m>
References: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061116230419.03fe5310@yahoo.com.ar>

At Thursday 16/11/2006 22:33, PS wrote:


>Friends,
>
>I am new to python and did search on the web on how to achieve this:
>( I am trying to append the line numbers to all the lines of a file for now)

But you forget to say what went wrong... Next time, post the error 
message including the full traceback.
Using my crystal ball I can see a few problems here:

>import os, sys
>
>fileName = os.path.join("C:", "temp", "x1.txt")
>fileobject = open(fileName, 'r')
>outputDir = "C://temp//"
>linenumber = 0
>fileName1 = outputDir + " x2.txt"

I see that you already know how to build properly a file name using 
os.path.join - well, some lazyness is ok...

>fileobject1 = open(fileName1, 'w')
>while (1):
>     L = fileobject.readline()
>     if L=="":
>         print "**Done"
>         break

Usually that's written as:

for L in fileobject:
     ... do something ...
else:
     print "** Done"

for is used to iterate over some sequence (or iterator), and a file 
acts as its own iterator, yielding one line at a time.
The else clause -optional- is executed when nothing remains to iterate.

>     linenumber += 1
>     fileobject1.write (ln)
>     fileobject1.write(":: "+ L)

I think here is your problem. You want the line number (printed as 
text), followed by two :, a space, and the original line contents. I'd use:

     fileobject1.write("%d:: %s" % (linenumber, L))
>
>fileobject1.close()
>=============================================================

Enough for a good start. Happy pythoning!


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fd0man at gmail.com  Fri Nov 10 11:14:15 2006
From: fd0man at gmail.com (Michael B. Trausch)
Date: Fri, 10 Nov 2006 11:14:15 -0500
Subject: Getting externally-facing IP address?
Message-ID: <1163175255.5053.124.camel@pepper>

Hello,

Every programming example that I have seen thus far shows simple server
code and how to bind to a socket--however, every example binds to the
localhost address.  What I am wondering is this:  Is there a clean way
to get the networked IP address of the machine the code is running on?
For example, my laptop's IP address is 192.168.0.101, and I want to bind
a server to that address.  Is there a clean way of doing so that will
work, for example, when I move the code to my server (which obviously
doesn't have the same IP address)?

Thanks in advance.

    -- Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
   Jabber IM: fd0man at livejournal.com

Demand Freedom!  Use open and free protocols, standards, and software!
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From bj_666 at gmx.net  Thu Nov  2 10:37:53 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 02 Nov 2006 16:37:53 +0100
Subject: string formatter for tuple
References: <1162481557.791817.41690@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.02.15.37.52.951402@gmx.net>

In <1162481557.791817.41690 at b28g2000cwb.googlegroups.com>, jeremito wrote:

> I have the following in my code
> 
> a = (1,2,3)
> print "a = %s" %a
> 
> But when I run this, I get:
> 
> TypeError: not all arguments converted during string formatting
> 
> Now I realize why this happens, a is actually 3 elements when the print
> statement is only expecting to print one value.  I tried
> 
> print "a = %s" %(a)
> 
> but I got the same error.
> 
> How can I print a tuple with a single string format?

Put the tuple in a tuple:

print 'a = %s" % (a,)

And remember: not the parenthesis create a tuple but the comma!

Ciao,
	Marc 'BlackJack' Rintsch


From jstroud at mbi.ucla.edu  Sat Nov  4 00:59:44 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Nov 2006 05:59:44 GMT
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
Message-ID: <k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>

Omar wrote:
> I'm looking for a programming language or module that sorta looks and
> feels like MS Excel (I love and think in tables), yet has the power and
> open-endedness of python or javascript.  I'm still pretty new to
> python.
> 
> any ideas?  i've been having some fun with VBA in excel, but I want
> something I can save as en exe and call my own creation, y'know?
> 

More than the implementation, I would be curious about the API you (or 
anyone else) might envision. I have spent a lot of time making a "Table" 
class over about the last year and a half, but I'm not sure what might 
be an intuitive interface for most people. First, I think it should work 
like a "sorted" dictionary of lists, but, at the same time, a list of 
sorted dictionaries. I also want *shorthand* for selection.

For example, does the output below look like an intuitive interface? Or, 
more likely, how many people get squeamish when they see this interface? 
Do these squeamish people have any better ideas? This is a taste of how 
my Table class currently behaves:

py> print t     # dependent on its property t.format
     Last      First      Age
     Barker    Bob        204
     Burnet    Carol      64
     Danson    Ted        54
     Cooper    Alice      78
py> t.headings()
("Last", "First", "Age")
py> t.get_row(1)   # approximately equal clarity with 1d slice
['Burnet', 'Carol', 64]
py> t[1]     # implicit selection of "first" dimension
['Burnet', 'Carol', 64]
py> t.get_column('Last')  # probably clearer than taking a 1d slice
['Barker', 'Burnet', 'Danson', 'Cooper']
py> # the following is probably the trickiest, should it return a Table
py> # should it be illegal?
py> # should t['Last'] be the way to take the "slice" and get the col?
py> t[None, 'Last']     # 1d slice returns list (2nd dim. explicit)
['Barker', 'Burnet', 'Danson', 'Cooper']
py> t2 = t[1:3, ('First', 'Age')]  # 2d slice returns a new Table
py> t2
<__main__.Table instance at 0x404f676c>
py> t2.format
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: 't2' object has no attribute 'format'
py> t2.format = "%10s   %4d"
py> print t2
      First    Age
      Carol     64
        Ted     54
py> t3 = t[1:3,'First':'Age']  # shorthand to take a swath of columns
py> t3.format = "%10s   %4d"
py> print t3
      First    Age
      Carol     64
        Ted     54
py> t3 = t[1:3, 0:2]  # if we know what column numbers we want instead
py> t3.format = "%10s%10s"
py> print t3
       Last     First
     Burnet     Carol
     Danson       Ted

These latter selections might turn some heads, especially for those who 
think a a little too deeply about dictionaries. But, unlike a 
dictionary, a Table is ordered. If you disagree with the assumption that 
tables are ordered, make a table in excel, save it, close it, open it 
again and see that the columns are still in the same order. Do this 1000 
times to convince yourself. The table will be in the same order every 
time! Amazing!

The idea is that tables are not dictionaries--please resist drawing 
paralells. If we strangle ourselves with operating under the dictionary 
paradigm, we will never get a Table. Trust me, I've thought about it 
more than most. (If you want a Table to act like a dictionary, I can 
make a RandomTable class just for you.)

Notice also that slicing can be done with a tuple or a list, so type 
checking is done in the implementation--but lets forget about our 
notions of impementation and how type checking is "bad". I want to get 
feedback on the API here without regard to how it might be implemented.

In a Table, the first dimension is row and the second is column (i.e. 
the data is organized by rows). My Table class has a lot of additional 
functionality. But, I'm curious about how people see such a beast 
working, though. Please don't criticize unless you have a better idea 
about the API of a Table. I want to hear genuine and concrete ideas and 
not abstruse pontification about programming or design! Statements of "I 
wouldn't do this thing here" should be immediately followed by 
"--rather, I would do this other thing for which I've created a concrete 
example below."

If you think this interface is genius, well my ego wants to hear about 
that as well, but its not terribly necessary.

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From Stef.Mientki at gmail.com  Wed Nov 29 18:52:05 2006
From: Stef.Mientki at gmail.com (aap)
Date: 29 Nov 2006 15:52:05 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163713573.147702.229320@k70g2000cwa.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163713573.147702.229320@k70g2000cwa.googlegroups.com>
Message-ID: <1164844325.180183.254540@n67g2000cwd.googlegroups.com>


John Henry wrote:
> Bill Gates will have you jailed! :-)
>
> On a more serious note, is there any alternative to Simulink though?
>
It's called SciCos, and as far as I've seen it not only covers Simulink
but also PowerSim.

I found only 1 major disadvantage inSciLab, ...
... it has no ActiveX

cheers,
Stef Mientki



From will at willNOmcguganSPAM.com  Wed Nov 29 17:24:56 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Wed, 29 Nov 2006 22:24:56 +0000
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
Message-ID: <456e08ba$0$1505$db0fefd9@news.zen.co.uk>


> #!/usr/bin/python -OO
> import math
> import sys
> import psyco
> 
> psyco.full()
> 
> def primes():
>     primes=[3]
>     for x in xrange(5,10000000,2):
>         maxfact = int(math.sqrt(x))
>         flag=True
>         for y in primes:
>             if y > maxfact:
>                 break
>             if x%y == 0:
>                 flag=False
>                 break
>         if flag == True:
>             primes.append(x)
> primes()
> 

Some trivial optimizations. Give this a whirl.

def primes():
     sqrt=math.sqrt
     primes=[3]
     for x in xrange(5,10000000,2):
         maxfact = int(sqrt(x))
         for y in primes:
             if y > maxfact:
                 primes.append(x)
                 break
             if not x%y:
                 break
     return primes

-- 
blog: http://www.willmcgugan.com


From johnjsal at NOSPAMgmail.com  Mon Nov 13 16:02:54 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Nov 2006 16:02:54 -0500
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.92.1163449609.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>
	<mailman.92.1163449609.32031.python-list@python.org>
Message-ID: <4558ddfa$0$8807$c3e8da3@news.astraweb.com>

Ben Finney wrote:

> No. "The fewer characters, the better" is not right. Such absolutes
> are to be avoided.
> 
> Sometimes, as in the case of omitting block-enclosing braces, removing
> characters results in better readability. Other times, as in the case
> of explicit names for objects, *more* characters results in better
> readability -- but only up to a point.

Ok, true, but there seems (to me) to be a difference between 
content-related characters, such as giving more descriptive names to 
variables, and syntax-related characters, such as colons and braces. I 
was thinking strictly of the language syntax and not necessarily about 
making the code quite literally more readable (with real words for 
variables instead of 'x', or 'timv' instead of 'this_is_my_variable').


From clodoaldo.pinto at gmail.com  Wed Nov 15 09:33:44 2006
From: clodoaldo.pinto at gmail.com (Clodoaldo Pinto Neto)
Date: 15 Nov 2006 06:33:44 -0800
Subject: Problem reading with bz2.BZ2File(). Bug?
References: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>
	<mailman.191.1163592523.32031.python-list@python.org>
	<1163593020.979114.73260@i42g2000cwa.googlegroups.com>
	<1163597087.396826.274580@k70g2000cwa.googlegroups.com>
Message-ID: <1163601224.826895.155400@e3g2000cwe.googlegroups.com>

Leo Kislov wrote:
> Confirmed on windows with 2.4 and 2.5:
>
> C:\p>\Python24\python.exe bzp.py
> line number: 588317
> '\x1e'
> ''
>
> C:\p>\Python25\python.exe bzp.py
> line number: 588317
> '\x1e'
> ''
>
> Looks like one byte of garbage is appended at the end of file. Please
> file a bug report.

Bug number 1597011

Clodoaldo



From no at spam.com  Wed Nov  8 14:07:29 2006
From: no at spam.com (Farshid Lashkari)
Date: Wed, 08 Nov 2006 11:07:29 -0800
Subject: is this the right way to do subclasses?
In-Reply-To: <45522074$0$17101$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>
Message-ID: <RVp4h.568$hM5.309@newsfe12.phx>

John Salerno wrote:
> Ok, back to my so-called "game." I'm just curious if I've implemented 
> the subclasses properly, because it seems like an awful lot of 
> repetition with the parameters. And again, if I want to add a new 
> attribute later, I'd have to change a lot of things. I can't help but 
> get the feeling that I'm doing something very inefficiently.

Just accept variable arguments in the constructor of the sub-classes and 
forward them to the base class.

class Fighter(Character):

     def __init__(self, *args, **kw):
         Character.__init__(self, *args, **kw)
         self.health += 2
         self.strength += 1

This way, if you add a new parameter to the base class, you won't need 
to update all the derived classes.

-Farshid


From sjmachin at lexicon.net  Wed Nov 22 16:59:01 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 13:59:01 -0800
Subject: utf - string translation
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
Message-ID: <1164232741.215312.322990@k70g2000cwa.googlegroups.com>

Dan wrote:
> Thank you for your answers.
>
> In fact, I'm getting start with Python.

That was a good decision. Welcome!

>
> I was looking for transform a text through elementary cryptographic
> processes (Vigen?re).

So why do you want to strip off accents? The history of communication
has several examples of significant difference in meaning caused by
minute differences in punctuation or accents including one of which you
may have heard: a will that could be read (in part) as either "a chacun
d'eux million francs" or "a chacun deux million francs" with the
remainder to a 3rd party.


> The initial text is in a file, and my system is under UTF-8 by default
> (Ubuntu)

Your system being "under UTF-8" does give you some clue, I suppose. Do
find the time to locate some data with accents and do print(repr(data))
as I suggested, to *verify* what you've got.

Don't guess. Different underlying representations can look the same
when rendered on your screen. Don't rely on what sysadmins tell you.
Peculiar things can happen, e.g.

me: How is your data encoded?
them: XYZese [a language]
me: I'll try again; Are you using encoding A or encoding B?
them: We've heard A mentioned; what's an encoding anyway?
[snip long explanation plus investigation of what locales [plural] had
been used when configuring their workstations and servers]
them: OK, so there's more than one way of representing XYZese on a
computer. That might explain why the government regulatory authority
for our industry is very sad [to put it mildly] about not being able to
read our monthly filings!!!

Cheers,
John



From sjdevnull at yahoo.com  Mon Nov  6 01:24:24 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 5 Nov 2006 22:24:24 -0800
Subject: wing ide vs. komodo?
In-Reply-To: <Xns987313BC43084mosornet@161.53.160.64>
References: <2nRXg.108$1n3.2866@news.tufts.edu>
	<1162690929.501897.258360@b28g2000cwb.googlegroups.com>
	<1162708898.962171.161120@e3g2000cwe.googlegroups.com>
	<Xns987313BC43084mosornet@161.53.160.64>
Message-ID: <1162794264.658671.122030@m7g2000cwm.googlegroups.com>

Karlo Lozovina wrote:
> "vj" <vinjvinj at gmail.com> wrote in news:1162708898.962171.161120
> @e3g2000cwe.googlegroups.com:
>
> > The embedded python shell is also a useful feature.
>
> Yes, but Debug Probe and Stack Data absolutely rock! Can't live without
> them anymore. Just set a breakpoint, run your code end then you can
> inspect all of the structures via Stack Data, and you can play with those
> structures using Debug Probe. Huge productivity boost...

Those are pretty basic features that any environment supporting a
symbolic python debugger should have, they're not a distinguishing
feature for one particular IDE--I wouldn't expect any environment that
didn't allow that to even be in the discussion.



From john106henry at hotmail.com  Thu Nov 30 14:39:41 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 11:39:41 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <1164914546.519186.239680@16g2000cwy.googlegroups.com>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<1164914546.519186.239680@16g2000cwy.googlegroups.com>
Message-ID: <1164915581.844811.307590@l12g2000cwl.googlegroups.com>


mdsteele at gmail.com wrote:
> John Henry wrote:
> > Can I say something to the effect of:
> >
> > (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work
>
> Your best bet is probably:
>
> x = [...some list...]
> a,b,c,d = x[:1],x[1:2],x[2:5],x[5:]
>

Dude!  Why didn't I think of that (tunnel vision).

Thanks,


> > I am asking this because I have a section of code that contains *lots*
> > of things like this.  It makes the code very unreadable.
>
> Of course, if you're always slicing up lists the same way (say, into
> 1,1,3,5 element sections) then you could improve readability by writing
> a function that takes the list and returns a tuple of the pieces, such
> as:
>
> def slice_list(x):
>     return x[:1],x[1:2],x[2:5],x[5:]
>
> a,b,c,d = slice_list(first_list)
> e,f,g,h = slice_list(second_list)
> 
> -Matt



From johnjsal at NOSPAMgmail.com  Tue Nov  7 15:57:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 15:57:07 -0500
Subject: sqlite query not working
Message-ID: <4550f36e$0$8780$c3e8da3@news.astraweb.com>

Hopefully this is enough code to reveal the problem. When I run the 
program, there are no error messages produced, it's just that the values 
I enter don't seem to get put into the database, even though the query 
seems to be ok.


     def OnSaveRecord(self, event):
         textfield_values = []
         for tab in self.notebook.GetCurrentPage().GetChildren():
             for table in self.get_textfield_ids():
                 table_values = []
                 for textfield_id in table:
                     table_values.append(xrc.XRCCTRL(tab, 
textfield_id).GetValue())
                 textfield_values.append(table_values)
         res_id = self.create_id(textfield_values[0][0], 
textfield_values[0][2])
         for table in textfield_values:
             table.insert(0, res_id)
         self.save_to_database(textfield_values)

     def save_to_database(self, data):
         # doesn't work?
         self.connection.execute("""INSERT INTO Personal VALUES
                                 (?,?,?,?,?,?,?,?,?,?)""", tuple(data[0]))


From prouleau001 at gmail.com  Thu Nov 30 15:17:35 2006
From: prouleau001 at gmail.com (Pierre Rouleau)
Date: 30 Nov 2006 12:17:35 -0800
Subject: Python 2.4 does not marshal infinity floating point properly under
	Win32
Message-ID: <1164917855.809114.184580@j72g2000cwa.googlegroups.com>

Hi all,

When using Python 2.4.x on a Win32 box,
marshal.loads(marshal.dumps(1e66666))  returns 1.0 instead of infinity
as it should and does under Python 2.5 (also running on Win32 ).

This problem was reported in another thread here by Peter Hansen
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/5c2b4b2a88c8df4/f216739705c9304f?lnk=gst&q=simplejson&rnum=5#f216739705c9304f

Is this considered an important enough bug to fix it in Python 2.4?



The following script exercise the problem when executed::

#---------------------------test_marshal.py--------------------------------------------------
import marshal

INFINITY = 1e66666
inf = 1e300 * 1e300
nan = inf - inf


def show(title, msg):
   print '%-10s : ' % title,
   msg2 = ''
   count = 0
   for chr in msg:
       count += 1
       val = ord(chr)
       print hex(val),
       if 31 < val < 128:
           msg2 += chr
       else:
           msg2 += '.'
   print '     ' * (9-count), ' : ', msg2



show('Nan', marshal.dumps(nan))
show('Infinity', marshal.dumps(INFINITY))
show('Infinity', marshal.dumps(inf))
show('Infinity', marshal.dumps(1e666))

val = marshal.loads(marshal.dumps(1e666))
print val
val = marshal.loads(marshal.dumps(INFINITY))
print val
assert val==INFINITY
#-------------------------------------------------------------------------------------------------------



When running the script on Win32 box with Python 2.4.3 or 2.4.4 I get::

D:\dev\python\test>t_marshal
Nan        :  0x66 0x7 0x2d 0x31 0x2e 0x23 0x49 0x4e 0x44   :
f.-1.#IND
Infinity   :  0x66 0x6 0x31 0x2e 0x23 0x49 0x4e 0x46        :  f.1.#INF
Infinity   :  0x66 0x6 0x31 0x2e 0x23 0x49 0x4e 0x46        :  f.1.#INF
Infinity   :  0x66 0x6 0x31 0x2e 0x23 0x49 0x4e 0x46        :  f.1.#INF
1.0
1.0
Traceback (most recent call last):
 File "D:\dev\python\test\t_marshal.py", line 33, in ?
   assert val==INFINITY
AssertionError

But when running the same script on a Win32 box, using Python 2.5, I
get::

C:\dev\python\test>t_marshal
Nan        :  0x67 0x0 0x0 0x0 0x0 0x0 0x0 0xf8 0xff   :  g........
Infinity   :  0x67 0x0 0x0 0x0 0x0 0x0 0x0 0xf0 0x7f   :  g.......?
Infinity   :  0x67 0x0 0x0 0x0 0x0 0x0 0x0 0xf0 0x7f   :  g.......?
Infinity   :  0x67 0x0 0x0 0x0 0x0 0x0 0x0 0xf0 0x7f   :  g.......?
1.#INF
1.#INF


#-------------------------------------------------



--

Pierre Rouleau



From ptmcg at austin.rr._bogus_.com  Sun Nov 19 16:34:18 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 21:34:18 GMT
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <u548h.601$Gk5.399@tornado.texas.rr.com>

"Mathias Panzenboeck" <e0427417 at student.tuwien.ac.at> wrote in message 
news:4560bfb0$0$10578$3b214f66 at tunews.univie.ac.at...
>I wrote a few functions which IMHO are missing in python(s itertools).
>
> You can download them here:
> http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>
> A short description to all the functions:
>
Just a couple of questions:

> iproduct(iterable, start=0) -> value
> Returns the product of the elements of a iterable
> times the value of parameter 'start'.  When the
> iterable is empty, returns start.
>
Wouldn't 1 be a better default value for start?

> forall(predicate, iterable, default=True) -> bool
> Returns True, when for all elements x in iterable
> predicate(x) is True. When the iterable is empty,
> returns default.
>
>
> forany(predicate, iterable, default=False) -> bool
> Returns True, when for any element x in iterable
> predicate(x) is True. When the iterable is empty,
> returns default.
>
How are these different from all and any in Python 2.5?

-- Paul




From paul at boddie.org.uk  Sat Nov  4 12:14:56 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Nov 2006 09:14:56 -0800
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
	<pan.2006.11.04.13.50.50.713078@gmx.net>
	<32822fe60611040558v511b7ce5v3062279228adcdd@mail.gmail.com>
	<eii7mt$mvm$1@sea.gmane.org>
	<mailman.1769.1162654617.11739.python-list@python.org>
Message-ID: <1162660496.132288.273660@m73g2000cwd.googlegroups.com>

Jorge Vargas wrote:
>

[quotefest trimmed]

> I have to disagree WSDL is a great standard and SOAP is great for
> transfering data from point a to point b. and it's very usefull for
> giving an interface for people to use like all those web2.0 api's out
> there.

Well, unless you're dealing with some kind of multipoint communications
architecture, SOAP isn't really much better than just firing plain XML
documents over HTTP from A to B, although my preferred use-cases for
SOAP don't involve the RPC style of messaging that most people think of
when SOAP is mentioned, so I guess you could benefit from SOAP (plus
WSDL) if you do really care about RPC. However, one thing CORBA has
going for it is maturity: the basic standards aren't in flux, and there
are a number of acceptable implementations out there.

Paul



From gh at gregor-horvath.com  Tue Nov 21 10:11:50 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 21 Nov 2006 16:11:50 +0100
Subject: Reference class in class creation
In-Reply-To: <1164116577.982892.136790@f16g2000cwb.googlegroups.com>
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
	<a1c52$4562f68e$547078de$28920@news.chello.at>
	<1164116577.982892.136790@f16g2000cwb.googlegroups.com>
Message-ID: <25995$45631738$547078de$11246@news.chello.at>

Carl Banks schrieb:

> You could change it to look like this instead:
> 
> def __new__(metatype,name,bases,clsdict):
>     # do some weird stuff here
>     cls = type.__new__(metatype,name,bases,clsdict)
>     cls.a = SomeContainer(cls)
>     return cls

Cark, many thanks for your suggestion, it solved my problem.

I changed the metaclass:

class ControllerMeta(type):
    def __new__(meta, class_name, bases, new_attrs):
        cls = type.__new__(meta, class_name, bases, new_attrs)
        cls.__classinit__.im_func(cls, new_attrs)
        cls.save = validate(cls.widget_edit)(bases[0].save)
        return cls

and the Tour Class:

class Tour(MotourController):
  __metaclass__ = ControllerMeta
  sqlobjectclass = model.Tour

  def __classinit__(cls, newattrs):
      cls.widget_edit = TourEdit(controller=cls, name = "tourheader",
                                 fields = [Label(name="id")])


And this seems to work fine.

Thanks
--
Greg


From tim.leslie at gmail.com  Wed Nov  1 19:16:51 2006
From: tim.leslie at gmail.com (Tim Leslie)
Date: Thu, 2 Nov 2006 10:16:51 +1000
Subject: Computing FFT with Python NumPy 1.0
In-Reply-To: <1162425898.984234.151740@i42g2000cwa.googlegroups.com>
References: <1162425898.984234.151740@i42g2000cwa.googlegroups.com>
Message-ID: <d32b45350611011616g32f45f04j7589fb4777899d93@mail.gmail.com>

On 1 Nov 2006 16:04:59 -0800, mcdurr at gmail.com <mcdurr at gmail.com> wrote:
> I recently installed Python 2.5 on Windows and also installed numpy
> 1.0.  I'd like to compute an FFT on an array of numbers but I can't
> seem to access the FFT function.  I'm fairly new to Python (obviously)
> and I can't seem to find documentation to match my distribution of
> numpy and I can't figure out how to access the FFT function.
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "copyright", "credits" or "license()" for more information.
>
> IDLE 1.2
> >>> from numpy import *
> >>> a=array((1,2,3,2,1,2,3,2,1))
> >>> fft(a)
>
> Traceback (most recent call last):
>   File "<pyshell#2>", line 1, in <module>
>     fft(a)
> TypeError: 'module' object is not callable
> >>>
>
> Help appreciated thanks.

The fft routines now live in numpy.fft.

>>> from numpy.fft import fft
>>> from numpy import array
>>> a=array((1,2,3,2,1,2,3,2,1))
>>> fft(a)
array([ 17.        +0.j        ,  -1.15270364-0.41954982j,
        -3.37938524-2.83564091j,   0.5       +0.8660254j ,
         0.03208889+0.18198512j,   0.03208889-0.18198512j,
         0.5       -0.8660254j ,  -3.37938524+2.83564091j,
        -1.15270364+0.41954982j])


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


From fuzzyman at gmail.com  Sat Nov 25 09:29:03 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Nov 2006 06:29:03 -0800
Subject: Importing module of data dicts and constants
In-Reply-To: <mailman.716.1164464372.32031.python-list@python.org>
References: <mailman.716.1164464372.32031.python-list@python.org>
Message-ID: <1164464943.812181.191570@j72g2000cwa.googlegroups.com>


Nathan Harmston wrote:
> Hi All,
>
> I ve got a single module which I m using to contain a lot of
> dictionaries, constants, general information, which are used by
> various other modules. However I can't seem to access them:
>
> in data.py
> _SEQTYPE_DNA = 0
> _SEQTYPE_RNA = 1
> _SEQTYPE_PROT = 2
> _seqType = { "DNA":_SEQTYPE_DNA, "RNA":_SEQTYPE_RNA, "PROTEIN":_SEQTYPE_PROT }
>
> but in test.py
> from data import *
>
> class Test(object):
>         def __init__(self, type):
>                   self.type = _seqType[type]
>         def test(self):
>                  return self.type
>
> t = Test("DNA")
> print t.test()
>
> File "test.py", line 24, in __init__
>     self.type = _seqType[type]
> NameError: global name '_seqType' is not defined
>
> I think I m doing something incredibly wrong/stupid here....
> Can anyone help?
>

This looks fine to me. Perhaps when you import from data you are not
getting the module you expect.

How about adding the following lines to your code and seeing if you get
the results you think   you should :

import data
print data.__file__

In general it is better to use the following import form. This way you
can explicitly see where your names are coming from :

from data import _seqType

Storing constants in a data module is fine if you don't expect end
users to edit the file. 'import' executes code, so it can be a security
hole to store configuration data in Python modules.

All the best,

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


> Many Thanks
>
> Nathan
>
> PS. I was wondering if the use of a data module to store constants and
> dictionaries is good design??? or not?



From DustanGroups at gmail.com  Sat Nov 25 18:07:41 2006
From: DustanGroups at gmail.com (Dustan)
Date: 25 Nov 2006 15:07:41 -0800
Subject: a -very- case sensitive search
In-Reply-To: <1164495824.540112.117410@l12g2000cwl.googlegroups.com>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<1164495824.540112.117410@l12g2000cwl.googlegroups.com>
Message-ID: <1164496061.281428.126670@l12g2000cwl.googlegroups.com>


Dustan wrote:
> Ola K wrote:
> > Hi,
> > I am pretty new to Python and I want to make a script that will search
> > for the following options:
> > 1) words made of uppercase characters -only- (like "YES")
> > 2) words made of lowercase character -only- (like "yes")
> > 3) and words with only the first letter capitalized (like "Yes")
> > * and I need to do all these considering the fact that not all letters
> > are indeed English letters.
> >
> > I went through different documention section but couldn't find a right
> > condition, function or method for it.
> > Suggestions will be very much appriciated...
> > --Ola
>
> I'm not sure exactly what you mean by "considering the fact that not
> all letters are indeed English letters"; you could mean you don't care
> about the non-english characters, or you could mean you don't want any
> non-english characters at all (so the function should return False in
> that case). If the case is the former, there's a simple test for each:
>
> >>> word = 'hi'
> >>> word.upper() == word # evaluates to True if the word is all caps
> False
> >>> word.lower() == word # evaluates to True if the word is all lowercase
> True
> >>> word.title() == word # evaluates to True if the word is in a title format
> False
> >>>

If you're using google groups, it for some reason thought my example
code was 'quoted text', which it certainly isn't, seeing as it's not
found anywhere prior to my message.



From tejovathi.p at gmail.com  Wed Nov  1 23:29:47 2006
From: tejovathi.p at gmail.com (Teja)
Date: 1 Nov 2006 20:29:47 -0800
Subject: Regular Expression for a string
In-Reply-To: <roy-D7B2EF.23145601112006@reader2.panix.com>
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
	<roy-D7B2EF.23145601112006@reader2.panix.com>
Message-ID: <1162441787.119071.265960@i42g2000cwa.googlegroups.com>


Roy Smith wrote:

> In article <1162440285.962155.325540 at f16g2000cwb.googlegroups.com>,
>  "Teja" <tejovathi.p at gmail.com> wrote:
>
> > HI all,
> >
> > I need to write a regular experssion for a string which satisfies the
> > following a criteria :
> >
> > 1) it should start with an alphabet
>
> I assume you mean, "It should start with a letter"?
>
> > 2) it can contain alphabets/digits/_ from second character
> > 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional
>
> How about:  ^[a-zA-Z][a-zA-Z0-9_]*[a-z0-9]?$
>
> Probably many variations on that theme will also work.

Thnks Roy for ur quick reply.....
Here is what I want actually

Some examples

string1
string_1
string1[0]
string_1_str[a]
STRING_1_[2]
STRING_1_str[a][1][2]

etc
etc

I need a regular expression for such strings



From gagsl-py at yahoo.com.ar  Thu Nov  9 09:55:01 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 11:55:01 -0300
Subject: help using smtplib to work ..
In-Reply-To: <1163043900.508155.326250@h48g2000cwc.googlegroups.com>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<mailman.1940.1163027412.11739.python-list@python.org>
	<1163043900.508155.326250@h48g2000cwc.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109115305.03e80aa0@yahoo.com.ar>

At Thursday 9/11/2006 00:45, Jordan wrote:

>Your post was definitely the most helpful for me.  For some reason,
>smtp for gmail seems to require that you call server.ehlo() a second
>time, after having called server.starttls(), otherwise, the server
>won't accept authorization.  Thanks.

That's clearly stated on the docs for the starttls method: 
http://docs.python.org/lib/SMTP-objects.html


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Tue Nov 28 16:29:16 2006
From: sjmachin at lexicon.net (John Machin)
Date: 28 Nov 2006 13:29:16 -0800
Subject: Simple text parsing gets difficult when line continues to next
	line
In-Reply-To: <mailman.812.1164747431.32031.python-list@python.org>
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
	<1164743287.835802.205540@h54g2000cwb.googlegroups.com>
	<mailman.812.1164747431.32031.python-list@python.org>
Message-ID: <1164749356.395286.148940@l12g2000cwl.googlegroups.com>


Tim Hochberg wrote:
[snip]
> I agree that mixing the line assembly and parsing is probably a mistake
> although using next explicitly is fine as long as your careful with it.
> For instance, I would be wary to use the mixed for-loop, next strategy
> that some of the previous posts suggested. Here's a different,
> generator-based implementation of the same idea that, for better or for
> worse is considerably less verbose:
>
[snip]

Here's a somewhat less verbose version of the state machine gadget.

def continue_join_3(linesin):
    linesout = []
    buff = ""
    pending = 0
    for line in linesin:
        # remove *all* trailing whitespace
        line = line.rstrip()
        if line.endswith('_'):
            buff += line[:-1]
            pending = 1
        else:
            linesout.append(buff + line)
            buff = ""
            pending = 0
    if pending:
        raise ValueError("last line is continued: %r" % line)
    return linesout

FWIW, it works all the way back to Python 2.1

Cheers,
John,



From rpdooling at gmail.com  Wed Nov  8 10:39:35 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 8 Nov 2006 07:39:35 -0800
Subject: Pyro stability
In-Reply-To: <mailman.1862.1162937898.11739.python-list@python.org>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<1162895554.549926.49280@k70g2000cwa.googlegroups.com>
	<4550FC50.5040204@mvista.com>
	<mailman.1862.1162937898.11739.python-list@python.org>
Message-ID: <1163000375.218915.88790@m73g2000cwd.googlegroups.com>

"Some guy hit my fender, and I said to him, 'Be fruitful and multiply,'
but not in those words." --Woody Allen

"Language is a virus from outer space." --William Burroughs



From eternalsquire at comcast.net  Mon Nov  6 21:55:02 2006
From: eternalsquire at comcast.net (The Eternal Squire)
Date: 6 Nov 2006 18:55:02 -0800
Subject: PyPotrace Version 1.0 released on Sourceforge!!!
Message-ID: <1162868102.693257.300020@i42g2000cwa.googlegroups.com>

All,

This is to let you know that I have designed, tested, and released a
simple wrapper around Peter Selig's Potrace raster to vector conversion
facility.

This is the same conversion engine as is used in Inkscape.   This
wrapper incorporates the Potrace code so that a separate dll for
Potrace is unnecessary, simply drop the distribution
directory under /Lib/site-packages and away you go!!!

The Potrace application normally creates an SVG or other file format
related vector file.
This wrapper simply generates a list of curves, where each curve is a
list of move, line,
and cubic bezier control points...    This is great for those building
thier own 2D and 3D
visualization projects.

It works very nicely, and can be found in Sourceforge under
https://sourceforge.net/projects/PyPotrace or by searching Sourceforge
using the PyPotrace project name.

If you want to see The Eternal Squire write more wrongs and perform
other
backslashbuckling deeds of an heroic nature, please consider donating
via
one of his projects on SourceForge!!!

Sincerely,

The Eternal Squire



From maxm at mxm.dk  Thu Nov 23 10:31:29 2006
From: maxm at mxm.dk (Max M)
Date: Thu, 23 Nov 2006 16:31:29 +0100
Subject: Email headers and non-ASCII characters
In-Reply-To: <mailman.639.1164291163.32031.python-list@python.org>
References: <mailman.639.1164291163.32031.python-list@python.org>
Message-ID: <4565bed2$0$13950$edfadb0f@dread15.news.tele.dk>

Christoph Haas skrev:
> Hello, everyone...
> 
> I'm trying to send an email to people with non-ASCII characters in their 
> names. A recpient's address may look like:
> 
> "J?rg N?rgens" <joerg at nowhere>
> 
> My example code:
> 
> =================================
> def sendmail(sender, recipient, body, subject):
>    message = MIMEText(body)
>    message['Subject'] = Header(subject, 'iso-8859-1')
>    message['From'] = Header(sender, 'iso-8859-1')
>    message['To'] = Header(recipient, 'iso-8859-1')
> 
>    s = smtplib.SMTP()
>    s.connect()
>    s.sendmail(sender, recipient, message.as_string())
>    s.close()
> =================================
> 
> However the Header() method encodes the whole expression in ISO-8859-1:
> 
> =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?=
> 
> However I had expected something like:
> 
> "=?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?=" <joerg at nowhere>
> 
> Of course my mail transfer agent is not happy with the first string 


Why offcourse? But it seems that you are passing the Header object a 
utf-8 encoded string, not a latin-1 encoded.

You are telling the header the encoding. Not asking it to encode.

-- 

hilsen/regards Max M, Denmark

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


From cping at dso.org.sg  Mon Nov 27 22:03:46 2006
From: cping at dso.org.sg (Jeremy)
Date: Tue, 28 Nov 2006 11:03:46 +0800
Subject: Floating Exception
Message-ID: <ekg8tq$uk8$1@nobel.pacific.net.sg>

Hi,

I just changed some previously-working Python program to add a C++ 
extension.

Now, when I call __init__() in a Python class I did not change and with the 
same arguments passed, I get the screen message 'Floating exception' and the 
program seems to stop. The exact point of the crash in __init__() seems to 
depend on from which directory I run the Python program.

What is wrong? And what is a floating exception?

Thanks,
Jeremy 




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Nov 19 07:22:46 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 19 Nov 2006 13:22:46 +0100
Subject: decompiler
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
	<Xns987F45C03807castleamber@130.133.1.4>
	<1163893594.341657.248720@k70g2000cwa.googlegroups.com>
Message-ID: <4sb0kmFurjq2U3@mid.individual.net>

Fuzzyman wrote:

> That's terrible. You read comp.lang.perl.misc *as well* ?
> 
> ;-)

You have to know your enemy ;)

Regards,


Bj?rn

-- 
BOFH excuse #343:

The ATM board has run out of 10 pound notes.  We are having a whip
round to refill it, care to contribute ?



From inq1ltd at verizon.net  Wed Nov  1 00:04:45 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 01 Nov 2006 00:04:45 -0500
Subject: best way to check if a file exists?
In-Reply-To: <EQO1h.213$1n3.4609@news.tufts.edu>
References: <EQO1h.213$1n3.4609@news.tufts.edu>
Message-ID: <200611010004.46135.inq1ltd@verizon.net>

On Tuesday 31 October 2006 16:01, John Salerno 
wrote:
> What is the best way to check if a file already
> exists in the current directory? I saw
> os.path.isfile(), but I'm not sure if that does
> more than what I need.
>
> I just want to check if a file of a certain
> name exists before the user creates a new file
> of that name.
>
> Thanks.


How about something like one of these;

    if os.path.isfile(vfileName) not True :
         male file
or
   if os.path.isfile (os.path.join(os.getcwd(),
       vFileName) )==True :
        do something

  
jim-on-linux

http://www.inqvista.com     


From Henk.van.Asselt at gmail.com  Sat Nov 11 04:42:25 2006
From: Henk.van.Asselt at gmail.com (Henk.van.Asselt at gmail.com)
Date: 11 Nov 2006 01:42:25 -0800
Subject: MySQLdb windows binaries for Python 2.5??
References: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>
Message-ID: <1163238145.257490.144410@b28g2000cwb.googlegroups.com>

I'm also looking for a MySQLdb binary for windows. This is holding me
from upgrading from Python 2.4 to Python 2.5 !

Or does anybody know of alternatives ?   I have to connect directly to
an MySQL database.

Henk

> HI All,
> Does such a beast exist?  Have been looking but haven't seen any.  Any
> insight would be appreciated.
> 
> Thanks.
> 
> Chris



From A.Lloyd.Flanagan at gmail.com  Thu Nov 30 10:13:13 2006
From: A.Lloyd.Flanagan at gmail.com (A. Lloyd Flanagan)
Date: 30 Nov 2006 07:13:13 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164874749.914101.32410@16g2000cwy.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164874749.914101.32410@16g2000cwy.googlegroups.com>
Message-ID: <1164899593.038458.166160@16g2000cwy.googlegroups.com>

On Nov 30, 3:19 am, "gavino" <booti... at yahoo.com> wrote:
> I want to learn to program and I can't seem to pick a direction.  A
> java guy I know makes a lot of $, but a lot of reading I have done
> shows lisp smalltalk and haskell to be really nice, as well as of
> course python.  It seems python is 4/5 way to lisp yet has a lot of

This may be a troll, but it's a chance for me to make a good point.  I
love making a point...

If you're serious about learning to program, you're thinking of it the
wrong way.  You need to learn HOW to program, which is independent of
knowing a particular language or environment.  In that sense it doesn't
matter what language you start with.  That said, Python is an excellent
teaching language due to its combination of simplicity and power.

If you're going to be a professional programmer, you should learn as
many different languages as you can.  Each brings its own "mindset" to
programming, and by learning the language you gain skills and concepts
that are applicable even when you're using a different language.



From dlenski at gmail.com  Mon Nov 20 18:34:30 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 20 Nov 2006 15:34:30 -0800
Subject: OODB vs RDBMS
In-Reply-To: <mailman.519.1164064611.32031.python-list@python.org>
References: <4se3omFv6reaU1@mid.individual.net>
	<45621a57$0$10443$426a74cc@news.free.fr>
	<mailman.519.1164064611.32031.python-list@python.org>
Message-ID: <1164065670.573361.60390@m73g2000cwd.googlegroups.com>

I'll second the recommendation of sqlalchemy... I've heard it's very
good.  Personally I prefer SQLObject, which is a similar library but in
my opinion a bit simpler and more "pythonic".

Needing to make a special "join table" to do arrays is one of the
downsides of RDBMS, but it leads to big performance advantages over
kludged-in things like using a variable-length string to store arrays.
Plus, with an ORM like sqlalchemy/sqlobject, you never have to deal
with the join table directly.  If you have a table that matches users
to purchases, for example, you can just do something like:

user = Users.retrieve(id)
purchases = user.Purchases()

ORMs like sqlobject are just awesome for making objects in a database
integrate seemlessly with python code: they make accessing and
manipulating objects in the database as easy as accessing regular
program variables.

Dan



From paddy3118 at netscape.net  Sat Nov 18 02:16:05 2006
From: paddy3118 at netscape.net (Paddy)
Date: 17 Nov 2006 23:16:05 -0800
Subject: How can I speed this function up?
In-Reply-To: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
Message-ID: <1163834165.876057.254700@j44g2000cwa.googlegroups.com>

Chris wrote:

> I have a vested interest in showing a colleague that a python app can
> yield results in a time comparable to his C-app, which he feels is mch
> faster. I'd like to know what I can do within the constraints of the
> python language to get the best speed possible. Hope someone can help.

Fight smart!
How long did the C-app take to write?
How robust are the C and the Python versions w.r.t. unforeseen inputs?
Mimic the software life-cycle:
  * How long would it take to make each program work on Windows?, Mac?
  * How long would it take to 'fully' test each program?
How easy is it to explain each prog. to an audience that have
programmed, but never in C or Python?
How long would it take to add another feature?

Best and best speed can have many meanings. good luck.

- Paddy.



From johnjsal at NOSPAMgmail.com  Tue Nov  7 14:12:53 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 07 Nov 2006 14:12:53 -0500
Subject: assigning values in __init__
In-Reply-To: <454faf57$0$12993$c3e8da3@news.astraweb.com>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <4550daa6$0$26446$c3e8da3@news.astraweb.com>

John Salerno wrote:

> Is this a good way to assign the values to the different attributes? 
> Should 'stats' be a list/tuple (like this), or should I do *stats instead?

Thanks guys! The main suggestion seems to be to use setattr(), so I 
might give that a try. But I do like Steve's suggestion that it's better 
to be explicit about each attribute, instead of just accepting a list of 
numbers (but I can't help but feel that for some reason this is better, 
because it's more general). We shall see! :)


From sander at steffann.nl  Tue Nov 21 18:39:16 2006
From: sander at steffann.nl (Sander Steffann)
Date: Wed, 22 Nov 2006 00:39:16 +0100
Subject: How good is CORBA?
References: <mailman.544.1164134192.32031.python-list@python.org>
Message-ID: <yYGdnYLz6Lu4E_7YnZ2dnUVZ8s6dnZ2d@giganews.com>

Hi,

>> I heard about CORBA... but also heard that it has some flaws...like
>> the programming being very complicated.
>> Also heard that CORBA is no more used these days...
>
> CORBA's wire protocol (GIOP/IIOP) is heavily used in (java) EJB servers.
>
>> Can someone suggest me a better option or is corba fine?
>
> Well, if you are in a 100% python environment, I would suggest
> to use Pyro instead (http://pyro.sf.net)
> Or some other pure-Python RPC mechanism.


If, on the other hand, you want/have to combine different programming 
languages and different environments, then CORBA will be a big help. For 
example: Making objects implemented in Python on a Linux machine work with 
objects implemented in C++ on a Windows machine (or even with objects 
implemented in COBOL on a mainframe) will be no problem at all.

In our company we use CORBA a lot, even though we mostly use Python these 
days. It gives us a lot of flexibility, while on the other hand it 'forces' 
us to strictly define the interfaces of our objects before implementing 
them. But that is a good thing :)

- Sander





From scott.daniels at acm.org  Thu Nov 23 11:50:21 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 23 Nov 2006 08:50:21 -0800
Subject: Abelson and Python
In-Reply-To: <1164281565.180846.232360@k70g2000cwa.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
	<mailman.625.1164269712.32031.python-list@python.org>
	<1164281565.180846.232360@k70g2000cwa.googlegroups.com>
Message-ID: <4565c7f6$1@nntp0.pdx.net>

markscottwright wrote:
> Fredrik Lundh wrote:
>> markscottwright wrote:
>>
>>  > If it were that easy, the PyPy guys would be done by now.
>>
>> if the PyPy guys had focused on writing a Python interpreter in Python,
>> they'd been done by now.
>>
>> </F>
> 
> Isn't that the point of PyPy?  It's what their mission statement says
> (http://codespeak.net/pypy/dist/pypy/doc/architecture.html#mission-statement):
> 
> "PyPy is an implementation of the Python programming language written
> in Python itself, flexible and easy to experiment with."
> 
> This is something that is amazingly easy to do in scheme, since the
> language is so simple, but is typically pretty difficult to do in other
> languages....
> 
> That said, I see now that the course we're talking about isn't the same
> as the old 6.001 course, and presumably has different pedagogical goals.
> 
There are a more than a few library functions in the Python code that
are written in C in CPython.  Not only is PyPy trying to get the
_entire_ Python system into Python, it is trying to do so in a
friendly-to-translation-in-a-statically-typed-language way.

Besides, if you can freely use "eval" and "exec", how hard is a pure
python language interpreter?

--Scott David Daniels
scott.daniels at acm.org


From ronrsr at gmail.com  Mon Nov 20 02:40:59 2006
From: ronrsr at gmail.com (ronrsr)
Date: 19 Nov 2006 23:40:59 -0800
Subject: trying to create a dictionary in python, using variables as a value
Message-ID: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>

but I keep getting syntax errors on this one -



adict = {'zid': result[0][0], 'keywords': result{0][1],
'quotations':result[0][2],'citations':result[0]{3]};
zhtml.print_update_form(adict);


result [0][0] = 22L
result [0].[1] = "Agricultural Subsidies, Global Trade', '

result[0][2]] = Lazio, Rick, "Some Trade Barrier1s Won\xe2\x80\x99t
Fall," <i>The New York Times</i>, 8/9/03\\r\\n"

result[0] [3] ='In 2002, the 30 industrial nations of the Organization
for Economic Cooperation and Development spent $311 billion on domestic
agricultural subsidies, which is more than the combined gross domestic
products of all the countries of sub-Saharan Africa. The World Bank
calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
farmers comes out to $913 per cow; this dwarfs sub-Saharan
Africa\xe2\x80\x99s per capita gross domestic product of
$490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n

result = ((22L, '((22L, 'Agricultural Subsidies, Global Trade', 'Lazio,
Rick, "Some Trade Barrier1s Won\xe2\x80\x99t Fall," <i>The New York
Times</i>, 8/9/03\\r\\n       \\r\\n       \\r\\n       ',
'\xe2\x80\x9cIn 2002, the 30 industrial nations of the Organization for
Economic Cooperation and Development spent $311 billion on domestic
agricultural subsidies, which is more than the combined gross domestic
products of all the countries of sub-Saharan Africa. The World Bank
calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
farmers comes out to $913 per cow; this dwarfs sub-Saharan
Africa\xe2\x80\x99s per capita gross domestic product of
$490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n       '),)n       ',
'\xe2\x80\x9cIn 2002, the 30 industrial nations of the Organization for
Economic Cooperation and Development spent $311 billion on domestic
agricultural subsidies, which is more than the combined gross domestic
products of all the countries of sub-Saharan Africa. The World Bank
calculated that the European Union\xe2\x80\x99s annual subsidy to dairy
farmers comes out to $913 per cow; this dwarfs sub-Saharan
Africa\xe2\x80\x99s per capita gross domestic product of
$490.\xe2\x80\x9d\\r\\n       \\r\\n       \\r\\n       '),)


thanks again for your wonderful assistance.

bests, 

-rsr-



From dlenski at gmail.com  Thu Nov  9 12:13:00 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 09:13:00 -0800
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
Message-ID: <1163092380.301382.113470@m7g2000cwm.googlegroups.com>

Nick Craig-Wood wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> >  Dan Lenski wrote:
> >
> > > So, is there another toolkit I should be looking at?
> >
> >  I highly recommend wxPython.
>
> I'd second that!
>
> There is a book also
>
>   "WxPython in Action"

Nick and John S., thank you for the tip on wxPython!  I'll look into it
for my next project.  I too would avoid Qt, not because of the GPL but
simply because I don't use KDE under Linux and because Qt is not well
supported under Cygwin or on native Windows.  I too like to learn from
actual printed books, so I'll check this one out.  O'Reilly should do a
book on Python GUI stuff!

John H.: thanks for pointing out pythoncard.  This looks like it might
be an excellent substitute for LabView-like GUIs, which all my
coworkers like.  I personally refuse to read or write LabView code, on
the grounds that its syntax causes severe brain damage and is
completely unportable.  But that's a flame for another thread, so to
speak...

Thanks,
Dan



From cameron.walsh at gmail.com  Wed Nov 15 01:33:15 2006
From: cameron.walsh at gmail.com (Cameron Walsh)
Date: Wed, 15 Nov 2006 14:33:15 +0800
Subject: reading csv problem
In-Reply-To: <1163570877.075189.174670@m73g2000cwd.googlegroups.com>
References: <1163570877.075189.174670@m73g2000cwd.googlegroups.com>
Message-ID: <ejec98$mh6$1@enyo.uwa.edu.au>

ajikoe at gmail.com wrote:
> Hello,
> 
> I use csv to take information from file.
> import csv
> reader = csv.reader(open('t.csv'))
> 
> for row in reader:
>     print row # it is perfectly OK
> 
> ---------------------------------------------------------------------
> But If I use this code I have problem
> import csv
> reader = csv.reader(open('t.csv'))
> 
> for row in reader:
>     print row # it is perfectly OK
> for row in reader:
>     print row # it is not printed on the monitor???
> 
> Why does only the first print row work here?
> 
> TIA,
> ajikoe
> 

Because reader is an iterator and has no means of going back to its
beginning.

You could make a list out of it:
lines = list(csv.reader(open('t.csv')))
for row in lines:
  print row
for row in lines:
  print row

Hope it helps,

Cameron.


From hodren.naidoo at adapt-it.co.za  Wed Nov 15 03:23:31 2006
From: hodren.naidoo at adapt-it.co.za (Hodren Naidoo)
Date: Wed, 15 Nov 2006 10:23:31 +0200
Subject: Difference
Message-ID: <1163579012.18671.10.camel@localhost>

Can someone plz tell me the differences between redirect and traverse in
python metadata?
-- 
Regards
Hodren Naidoo



From stuart at microsoft.com  Wed Nov 22 07:08:38 2006
From: stuart at microsoft.com (stuart at microsoft.com)
Date: 22 Nov 2006 04:08:38 -0800
Subject: File upload from client application (non-form based upload)
Message-ID: <1164197318.244221.61540@m7g2000cwm.googlegroups.com>

Hi

I'm trying to write a Python script to receive and save a file on a web
server that has been POST'ed from a client application.

In essence, this is similar to handling a file upload from an HTML
form. However, I can't use:

form = cgi.FieldStorage()
fileitem = form['file']

since the file is not coming from a form, and hence I don't have a form
field called 'file'.

I have working server-side code in PHP to do this (error handling
removed):

$file = "./test.jpg";
$file_handle = fopen($file,"w");
$mydata = file_get_contents("php://input");
fwrite($file_handle, $mydata);
fclose($file_handle);

What I need is a Python equivalent of the the above PHP script. The
content-type in the POST header is currently set to
"application/octet-stream" which works fine with the php code above.

Any help, advise, pointers, sample code would be hugely welcome,

Many thanks in advance,

Stuart



From no-spam at no-spam-no-spam.invalid  Mon Nov 20 08:37:48 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 20 Nov 2006 14:37:48 +0100
Subject: n-dim permutation matrix/generator?
Message-ID: <ejsb3h$uue$1@news.albasani.net>

for the purpose of flat n-dim iteration a function or generator ndim_permute(*v) should compute or generate a list of tuples like:

ndim_permute( (0,1,2), (0,1), (0,1), ) ->
 
0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 1
1 0 1
....


what is a good solution? Or is there already a total iterator existing somewhere in the stdlib?


robert


From vania.cIlli at gmail.com  Thu Nov 23 07:09:18 2006
From: vania.cIlli at gmail.com (Vania)
Date: 23 Nov 2006 04:09:18 -0800
Subject: socket.error connection refused
Message-ID: <1164283758.225074.9810@h54g2000cwb.googlegroups.com>

Hi, I'm not sure this is the proper forum but I try nevertheless.
The problem I'am facing is that the socket library always fail to
connect to an URL. The net effect is that I can not use setuptools.
I'm using Python2.4 on a windows XPPRO Sp2 machine.
The firewall is disabled.
There is no NLTM proxy.
I connect to the internet through a NAT server (and it works).
Other than with easy_install I tried to connect to a number of external
urls
(all of them running) and even to localhost,
directly in script using urllib
and the error is always the same errno:  10061 connection refused.
Any ideas?



From tuomas.vesterinen at pp.inet.fi  Mon Nov  6 17:31:00 2006
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Mon, 06 Nov 2006 22:31:00 GMT
Subject: forwarding *arg parameter
In-Reply-To: <mailman.1814.1162842810.11739.python-list@python.org>
References: <6pn3h.125$7b6.98@read3.inet.fi>	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>	<aop3h.180$7b6.55@read3.inet.fi>	<2Fp3h.195$7b6.100@read3.inet.fi>	<eilc3m$301a$1@ulysses.news.tiscali.de>	<y2r3h.244$7b6.238@read3.inet.fi>	<pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>	<%oG3h.107$8a7.65@read3.inet.fi>
	<mailman.1814.1162842810.11739.python-list@python.org>
Message-ID: <EIO3h.303$8a7.74@read3.inet.fi>

Steve Holden wrote:
> Suppose you did actually want to do this you have chosen about the worst 
> possible way: the use of global variables to condition function 
> execution is a sure way to get into trouble. Consider if somebody else 
> want to use your function: they also have to set a global in their 
> program to avoid your function raising an exception.

Do you think all discussion examples are included a producton application.

> Fortunately Python has just the thing to make such horrors unnecessary: 
> the default argument value. Try something like this (untested):
> 
> def g(flattening=True, *arg):
>     if flattening:
>     arg = flatten(arg)
>     return arg
> 
> Obviously you could use either True or False for the default value. In 
> the case above the function flattens by default. You could also, if you 
> wished, have f() take the flattening argument, and always pass it to g().
> 
> Nothing very sophisticated here, just something to help you flex your 
> growing Python and programming muscles.

Thanks for your good purposes.

TV

> regards
>  Steve


From ptmcg at austin.rr.com  Fri Nov 17 01:37:29 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Nov 2006 22:37:29 -0800
Subject: PIL - "despeckle" image ?
In-Reply-To: <1163739509.324034.177650@m7g2000cwm.googlegroups.com>
References: <1163739509.324034.177650@m7g2000cwm.googlegroups.com>
Message-ID: <1163745449.796912.7700@h48g2000cwc.googlegroups.com>

On Nov 16, 10:58 pm, shearich... at gmail.com wrote:
> Hi - I have some images which I would like to remove specks from using
> the PIL. I would like to be able to say that if a pixel is in a blob of
> less than n contiguous pixels then all pixels in that blob should be
> removed.
>
> The images are 8 bit images with only 0 and 255 values.
>
> I can think of quite crude ways of doing this but I'm sure there are
> some smart ways of doing it - would anyone be able to point me in the
> right direction ?
>
> Lastly in case it matters the reason I'm doing this is that the images
> are scanned images of sheets of papers on which sample signatures have
> been placed. Typically the signatures are much smaller than the sheets
> of paper so I would like to 'autocrop' the images to remove the white
> space around the signature. At some point in the process the images
> having picked up small islands of pixels (dust on scanner or paper ?)
> which are nowhere near the signature but which are causing my autocrop
> efforts to go awry.
>

What if you break up your sheet into zones of some arbitrary size (1/2"
say), and compute a pixel density?  (Density isn't really required,
since all zones are the same size - raw pixel count per zone will do
just as well.)  Then locate the signature based on the zones with
density above threshold X (determine X by trial and error).  Lastly,
clip within these zones if this is still necessary.

-- Paul



From gene.tani at gmail.com  Mon Nov 20 00:16:52 2006
From: gene.tani at gmail.com (gene tani)
Date: 19 Nov 2006 21:16:52 -0800
Subject: Secure Python
In-Reply-To: <mailman.338.1163770169.32031.python-list@python.org>
References: <1163646179.11586.60.camel@pc7.dolda2000.com>
	<017e01c7094b$86c36ce0$03000080@hendrik>
	<mailman.338.1163770169.32031.python-list@python.org>
Message-ID: <1163999812.599649.150330@m7g2000cwm.googlegroups.com>


Fredrik Tolf wrote:
> On Thu, 2006-11-16 at 08:43 +0200, Hendrik van Rooyen wrote:
> >  "Fredrik Tolf" <fredrik at dolda2000.com> wrote:
> >
> > > I was thinking that maybe it could be possible to load and run untrusted
> > > Python code, simply by loading it in a module with a modified version of
> > > __builtins__. Without any reachable function that do unsafe operations,
> > > code running from there shouldn't be able to do evil things.
> >
> > google for "sandbox"
>
> I tried googling for various combinations of "sandbox", "python" and
> some other keywords, but I could not find anything that seemed relevant.


Nothing?
http://svn.zope.org/Zope3/trunk/src/zope/security/untrustedinterpreter.txt?view=auto
http://www.sauria.com/blog/computers/security/1431

http://svn.zope.org/Zope3/trunk/src/zope/security/untrustedinterpreter.txt?view=auto

http://svn.python.org/view/python/branches/bcannon-sandboxing/
http://sayspy.blogspot.com/2006/07/still-working-on-security.html



From jameshcunningham at gmail.com  Thu Nov 16 09:54:34 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Thu, 16 Nov 2006 09:54:34 -0500
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
	<mailman.243.1163673962.32031.python-list@python.org>
	<2006111607574875249-jameshcunningham@gmailcom>
	<mailman.259.1163686224.32031.python-list@python.org>
Message-ID: <2006111609543416807-jameshcunningham@gmailcom>

On 2006-11-16 09:08:43 -0500, Steve Holden <steve at holdenweb.com> said:

> James Cunningham wrote:
>> On 2006-11-16 05:46:45 -0500, Steve Holden <steve at holdenweb.com> said:
>> 
>>> James Cunningham wrote:
>>>> On 2006-11-15 20:59:26 -0500, "walterbyrd" <walterbyrd at iname.com> said:
>>>> 
>>>>> Bruno Desthuilliers wrote:
>>>>>> walterbyrd a ?crit :
>>>>>> You mean there are web hosting companies that are still using Apache
>>>>>> 1.3.x ?
>>>>>> 
>>>>> Practically all web-hosters still use Apache 1.3.x. Certainly all of
>>>>> the lower priced hosters.
>>>> Not true. Dreamhost, at least, uses Apache 2.
>>> So you thin a single counter-example disproves an assertion that begins 
>>> with "practically all"?
>> 
>> Nope. It disproves your assertion that "certainly all of the lower 
>> priced hosters" use Apache 1.3.
>> 
>> "Certainly all".
>> 
>> "Certainly" "all".
>> 
> Certainly. But not my assertion.
> 
> regards
>   Steve

So I should be bothered to read the name of whom I'm replying to?

Sheesh. ;)

Best,
James



From icetortoise at gmail.com  Thu Nov 23 07:53:08 2006
From: icetortoise at gmail.com (Andy)
Date: 23 Nov 2006 04:53:08 -0800
Subject: How do I find possible matches using regular expression?
In-Reply-To: <mailman.629.1164277019.32031.python-list@python.org>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
	<yDd9h.2553$Gk5.410@tornado.texas.rr.com>
	<1164276138.816724.253400@l12g2000cwl.googlegroups.com>
	<mailman.629.1164277019.32031.python-list@python.org>
Message-ID: <1164286388.857072.56120@m7g2000cwm.googlegroups.com>

OK, here's what I want...

I'm doing a auto-tasking tool in which user can specify the execution
rule by inputting English instead of a complex GUI interface(Normally a
combination of many controls). This way is way better user interaction.

So the problem comes down to "understanding" user input and
"suggesting" possible inputs when user is writing a rule.

Rules will be like "30 minutes later", "Next Monday", "Every 3 hours",
"3pm"...Sure this is an infinite collection, but it doesn't have to be
perfect , it might make mistakes given inputs like "10 minutes after
Every Monday noon".

The "suggesting" feature is even harder, I'm still investigating
possibilities.

Tried NLTK_Lite, I'm sure it can understands well a good user input,
but it is not doing good with some bad inputs("2 hours later here"),
bad inputs makes the toolkit fails to parse it. And NLTK also does not
help on the suggesting part.

Now I'm thinking manipulating regular expressions. I think it's
possible to come up with a collection of REs to understand basic
execution rules. And the question is again how to do suggestions with
the RE collection.

Any thoughts on this subject?

I'm not a native English speaker so...please, be mistake tolerant with
my post here:-)




"Fredrik Lundh ???
"
> Andy wrote:
>
> > The problem is the input will be much more complex than the example, it
> > could be something like "30 minutes later" where any string starting
> > with a number is a possible match.
>
> so if I type "1", are you going to suggest all possible numbers
> that start with that digit?  doesn't strike me as very practical.
>
> maybe you could post a more detailed example, where you clearly
> explain what a pattern is and how it is defined, what prediction
> means, and what you want to happen as new input arrives, so we
> don't have to guess?
> 
> </F>



From yaru22 at gmail.com  Wed Nov 29 00:29:41 2006
From: yaru22 at gmail.com (yaru22)
Date: 28 Nov 2006 21:29:41 -0800
Subject: Python program that validates an url against w3c markup validator
Message-ID: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>

I'd like to create a program that validates bunch of urls against the
w3c markup validator (http://validator.w3.org/) and store the result in
a file.

Since I don't know network programming, I have no idea how to start
coding this program.

I was looking at the python library and thought urllib or urllib2 may
be used to make this program work.

But I don't know how to send my urls to the w3c validator and get the
result.

Can anyone help me with this? or at least give me a hint?

Thank you so much.



From ptmcg at austin.rr._bogus_.com  Thu Nov 30 14:37:58 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 30 Nov 2006 19:37:58 GMT
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<MmGbh.10434$Gk5.6762@tornado.texas.rr.com>
Message-ID: <qqGbh.10436$Gk5.6159@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message 
news:MmGbh.10434$Gk5.6762 at tornado.texas.rr.com...
> "John Henry" <john106henry at hotmail.com> wrote in message 
> news:1164913125.509492.54060 at 79g2000cws.googlegroups.com...
snip

Grrrr... that's what I get for not keeping editor and interpreter windows in 
sync.  My post was referencing vars I had defined in the interpreter, but 
which the function had no clue of. !!!  Here's a working version.

-- Paul


def splitUp(src,lens):
    ret = []
    cur = 0
    for length in lens:
        if length is not None:
            ret.append( src[cur:cur+length] )
            cur += length
        else:
            ret.append( src[cur:] )
    return ret

origlist = list("ABCDEFGHIJ")
alist, blist, clist, dlist = splitUp( origlist, (1,1,3,None) )
print alist, blist, clist, dlist




From anujseth76 at gmail.com  Wed Nov  1 05:03:26 2006
From: anujseth76 at gmail.com (anujseth76 at gmail.com)
Date: 1 Nov 2006 02:03:26 -0800
Subject: SWIG, C++ and extension modules problem
Message-ID: <1162375406.601158.287490@b28g2000cwb.googlegroups.com>

Hi,
This might be slightly off topic and  but i am hoping someone here can
help.
I am trying to build a python wrapper for some C++ classes that access
oracle.
when i try loading the module i get the following errors

Python 2.4.2 (#1, Nov  9 2005, 09:37:25) [C] on hp-ux11
Type "help", "copyright", "credits" or "license" for more information.
>>> import DbConnectionParams
# DbConnectionParams.pyc matches DbConnectionParams.py
import DbConnectionParams # precompiled from DbConnectionParams.pyc
shl_load _DbConnectionParams.sl
/usr/lib/pa20_64/dld.sl: Unsatisfied data symbol 'kpggwcx_' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'LhtStrSearch' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'kpggGetPG' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'LhtStrInsert' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'kpuhhalo' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'kpuhhfre' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'LhtStrCreate' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.
/usr/lib/pa20_64/dld.sl: Unsatisfied code symbol 'kpugdr' in load
module '/oravl01/oracle/9.2.0.6/lib/libwtc9.sl'.

doing "ldd -r" on that module does not show any undefined symbols in
the oracle libraries.

Platform - HP-UX B.11.11
Command to create the shared lib for extension module (sdklib is the
proprietary lib i am trying to wrap )  -
/opt/aCC/bin/aCC +DD64 -b  -mt -AA -D__HPACC_THREAD_SAFE_RB_TREE
-DRWSTD_MUL\
TI_THREAD -DRW_MULTI_THREAD  -D_REENTRANT   -D_THREAD_SAFE  -Wl,+k
-Wl,+s -Wl,+n -Wl,-B,symbolic -o_DbConnectionParams.sl
DbConnectionParams_wrap.o  $(SDK_LIB_DIRS) -L$(ORACLE_HOME)/lib
-lsdklib /oravl01/oracle/9.2.0.6/precomp/lib/cobsqlintf.o
/oravl01/oracle/9.2.0.6/lib/libsql9.a -locci -lclntsh -lnsl
-L/usr/lib/pa20_64 -lstd_v2 -lCsup_v2


Any pointers will be appreciated,
Thanks,
Anuj.



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 12:19:36 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 05 Nov 2006 04:19:36 +1100
Subject: Really strange behavior
References: <pan.2006.11.04.12.02.26.532144@yahoo.it>
Message-ID: <pan.2006.11.04.17.19.35.212022@REMOVE.THIS.cybersource.com.au>

On Sat, 04 Nov 2006 13:02:26 +0100, IloChab wrote:


> If I run this:
> # >>>>>>>>>>>>>
> import  qt4reactor
> import sys
> from PyQt4 import  QtGui
> from winIum import Window
> 
> def creApp():
>     app = QtGui.QApplication(sys.argv)
>     qt4reactor.install(app)
>     retrun app

This is not actually the code you are trying to run, because "retrun app"
would give a SyntaxError. You should copy and paste the actual code you
have run, don't retype it.


> my window doesn't show and the script doesn't stop but remains trapped
> in some gui loop.
>  
> What's the problem I can't see??

Don't know, I can't see it either.

Why don't you add some temporary print statements into your code to try to
narrow it down?


def main():
    print "entered main"
    app = creApp()
    print "done creApp"
    creWin()
    print "done creWin"
    from twisted.internet import reactor
    print "done import"
    reactor.run()
    print "done reactor.run; exiting main"


-- 
Steven.



From fredrik at pythonware.com  Sun Nov 26 16:09:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 26 Nov 2006 22:09:04 +0100
Subject: Generating header information using ElementTree
In-Reply-To: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
Message-ID: <ekcvpg$4th$1@sea.gmane.org>

Craig wrote:

> I'm only new to Python so please bear with me.  I using ElementTree to
> generate an XML file that will reference a DTD and an XSL file.  The
> header information I want at the start of the file is as follows:
> 
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="test.xsl"?>
> <!DOCTYPE BobActivityLog SYSTEM "test.dtd">
> 
> How do you add this header information to the tree

to the file, you mean?  use print.

</F>



From dannycolligan at gmail.com  Thu Nov 16 11:09:14 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 16 Nov 2006 08:09:14 -0800
Subject: Yield
In-Reply-To: <eji19t$cak$1@south.jnrs.ja.net>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
	<eji19t$cak$1@south.jnrs.ja.net>
Message-ID: <1163693354.446751.38890@b28g2000cwb.googlegroups.com>

> The more trivial the example, the harder it is to see the advantage.

I absoultely agree.  Thanks for pointing me out to some real-world
code.  However, the function you pointed me to is not a generator
(there is no yield statement... it just returns the entire list of
primes).  A generator version would be:

>>> def primes(n):
...     if n<2: yield []
...     s=range(3,n+1,2)
...     mroot = n ** 0.5
...     half=(n+1)/2-1
...     i=0
...     m=3
...     while m <= mroot:
...         if s[i]:
...             j=(m*m-3)/2
...             s[j]=0
...             while j<half:
...                 s[j]=0
...                 j+=m
...         i=i+1
...         m=2*i+3
...     yield 2
...     for x in s:
...         if x: yield x
...
>>> x = primes(11)
>>> x.next()
2
>>> x.next()
3
>>> x.next()
5
>>> x.next()
7
>>> x.next()
11
>>> x.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
StopIteration
>>>

Danny Colligan

On Nov 16, 10:49 am, "Richard Brodie" <R.Bro... at rl.ac.uk> wrote:
> "Danny Colligan" <dannycolli... at gmail.com> wrote in messagenews:1163691173.737911.130410 at i42g2000cwa.googlegroups.com...
>
> > Now that we're on the subject, what are the advantages of using
> > generators over, say, list comprehensions or for loops?  It seems to me
> > that virtually all (I won't say everything) the examples I've seen can
> > be done just as easily without using generators.The more trivial the example, the harder it is to see the advantage.
> Suppose you wanted to sum the first 10000 primes. A quick Google
> fins you Wensheng Wang's recipe:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/366178
> Just add print sum(primes(10000)), and you're done.



From Dennis.Benzinger at gmx.net  Tue Nov 14 14:06:12 2006
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Tue, 14 Nov 2006 20:06:12 +0100
Subject: How to check for instances of a class
References: <1163530852.868370.104780@h54g2000cwb.googlegroups.com>
Message-ID: <20061114200612.5c8e4874@localhost>

On 14 Nov 2006 11:00:53 -0800
erokar at gmail.com wrote:

> Traversing a list of variables, I need to check wheter an element in
> the list is an instance of a (user defined) class. What cind of
> comparison operator can I use? Can't seem to find this in the
> documentation. I anyone have an example it is much appreciated.

Use isinstance() <http://docs.python.org/lib/built-in-funcs.html>.

You need something like 

>> isinstance(list_element, your_class)


Dennis


From tennessee at tennessee.id.au  Thu Nov 23 00:28:57 2006
From: tennessee at tennessee.id.au (Tennessee Leeuwenburg)
Date: Thu, 23 Nov 2006 16:28:57 +1100
Subject: The Python Papers Edition One
In-Reply-To: <7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
Message-ID: <43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>

On 11/23/06, Stephen Hansen <shansen at advpubtech.com> wrote:
>
>
>
> > 3.) Can I have an HTML version?
> > A) No, we like it pretty.
>
>
> The interesting thing is, there's nothing in your layout or format that you can't do with some nice standards-compliant HTML and CSS. It could look identical as HTML-- and be significantly more "reachable" by people, easier for them to use and read, link to, and so on and so forth.
>
> Plus you could stick some Google adwords ads on it :)
>
> But, really... if you're eventually wanting this to be a printed/published/mailed sort of thing, I can understand why you'd want to do it as a PDF... but you will be limiting your audience in the meantime. A lot of people just find it too tedious and difficult, and if your goal is to reach people and communicate....
>
> Why not do both? Might take a bit more work-- but the layout you have isn't that hard to do in HTML, and there's gotta be a way to html2pdf... I've never wanted to, but there has to be. =)
>

Thanks v. much for the comments. Not a week goes by that this
limitation doesn't irk me. All I can say is that I feel your pain, and
also I really appreciate the response, because the project succeeds
only according to the enthusiasm that can be generated.

 So, why aren't we publishing in HTML and not worrying about PDF?
   * Document lodgement in online archives. PDFs are a nice bundled
format which preserves formatting, paging etc, isn't resolution
dependent
   * Page numbers and tables of contents
   * Lack of a WYSIWYG gui for advance HTML layouts fully supporting
all browser differences.
   * Source application is currently OpenOffice, which *definitely*
doesn't support good enough HTML output.
   * If you say LaTex, I'll eat your brain. Or my hat. Unless I'm
seriously underrating it, but I don't think so.
   * Scribus crashed multiple times when I was testing it out using on
our first version. I think it's too big.

In my explorations, I have found:
   * pdf2html is a lame duck
   * html2pdf can't be done

The only possibility is going from something like odt to both PDF and
html, but you seriously lose out in using OpenOffice to generate the
HTML. I haven't been able to identify a truly working upstream
application from which both HTML and PDF can be derived.

PDF2ASCII works okay, but you lose your images.

Docbook format appears to be a possibility, but it lacks a good GUI
for editing in, so you're talking raw XML. OpenOffice claims to
support it, but I couldn't get it to work properly.

Article submissions need to be handled in a variety of formats,
usually word or OpenOffice are used, for example.

It might be possible using Python and ReportLabs to *write* something
which would support a layout which could be translated into HTML and
PDF without a major loss of quality, but this is a major project in
its own right. It would also require that authors make proper use of
sections and heading options rather than just fiddling with the font
size. <sigh>.

Trust me, I thought about it. It still bugs me. It will probably bug
me forever. At this stage, the only viable options I can see are to go
to HTML as the primary format, increase the workload involved in
typesetting and layout, and abandon the idea of a print-friendly
layout, or to continue with the current situation despite its
drawbacks.

If anyone has any good ideas for how to cope as a publisher with these
difficulties, I'm all ears. I want something that Just Works. If
there's a Good Way to Do Things, I'll happily adopt it.

 Cheers,
 -T (Editor-In-Chief)


From Roka100 at gmail.com  Wed Nov  8 03:21:27 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 8 Nov 2006 00:21:27 -0800
Subject: ANN: wxPython 2.7.2.0
In-Reply-To: <mailman.1882.1162972778.11739.python-list@python.org>
References: <mailman.1882.1162972778.11739.python-list@python.org>
Message-ID: <1162974087.334368.269010@h48g2000cwc.googlegroups.com>


Robin Dunn wrote:
> Announcing
> ----------

Thanx.

But I found wxPy's release speed is too fast that we nearly cannot
catch up with it :)



From python.list at tim.thechases.com  Fri Nov 17 11:12:19 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 17 Nov 2006 10:12:19 -0600
Subject: String Replace only if whole word?
In-Reply-To: <004a01c70a47$7691a240$0d7d12ac@kearfott.com>
References: <004a01c70a47$7691a240$0d7d12ac@kearfott.com>
Message-ID: <455DDF63.8030407@tim.thechases.com>

>   I have been using the string.replace(from_string, to_string, len(string))
> to replace names in a file with their IP address.
>   For example, I have definitions file, that looks something like:
> 10.1.3.4   LANDING_GEAR
> 20.11.222.4   ALTIMETER_100
> 172.18.50.138 SIB
> 172.18.50.138 LAPTOP
> 172.18.51.32  WIN2000
> 127.0.0.1 LOCALHOST
> 
>   and I have a text file (a Python script) that has these names in the file.
> In most cases the string.replace() command works great. But there is one
> instance which it fails:
> Suppose I had in the file:
>  if (LAPTOP_IS_UP()):
>    It would replace the string with:
>  if ("172.18.50.138"_IS_UP()):
> 
> Is there any easy way to avoid this, only replace if a whole
> word matches? I probably need something which determines when
> a word ends, and I will define a word as containing only
> 'A'-'Z','a'-'z','0'-'9','_' . As long as the string contains
> more of the word digits after the match, don't replace?

A solution I've used in the past (whether it's good or not, I'd 
be interested to get feedback from the list)

 >>> mapping = {}
 >>> for line in file('definitions.txt'):
...     ip, name = line.split()
...     mapping[name] = '"%s"' % ip
...
 >>> import re
 >>> s = "LAPTOP LAPTOP_IS_UP"
 >>> r = re.compile(r'\b\w+\b')
 >>> r.sub(lambda match: mapping.get(match.group(0), 
match.group(0)), s)
'"172.18.50.138" LAPTOP_IS_UP'


The regexp '\b\w+\b' finds "word"s (where \w is locale specific, 
but could easily be rewritten as '\b[a-zA-Z0-9_]+\b' if you 
needed) while the '\b' portion ensures that there's a 
word-to-non-word boundary coming or going.

It then goes through and replaces every word in the string with 
either the result of looking it up in the magic mapping, or with 
its original contents.

-tkc






From gagsl-py at yahoo.com.ar  Thu Nov  9 19:52:14 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 21:52:14 -0300
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109215129.058ee910@yahoo.com.ar>

At Thursday 9/11/2006 21:44, gavino wrote:

>both are interpreted oo langauges......

I'd use Google to find thousands of references...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ptmcg at austin.rr._bogus_.com  Sun Nov 19 20:32:22 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 20 Nov 2006 01:32:22 GMT
Subject: re.match -- not greedy?
References: <mailman.476.1163979600.32031.python-list@python.org>
Message-ID: <GA78h.678$Gk5.16@tornado.texas.rr.com>

"EXI-Andrews, Jack" <Jack.Andrews at boeing.com> wrote in message 
news:mailman.476.1163979600.32031.python-list at python.org...

in real life, i am trying to match #defines:

>>> re.match( '#define ([A-Za-z0-9_]+)([^(])', '#define
abc(d)').groups()
('ab', 'c')

i want this example to fail because the first character after a string
of letters is a '('
i want to match only #defines without parameters.
>
>

Here's a pyparsing grammar that matches your #defines as you describe (skip 
over #defines with parameters), and also skips over ones that are commented 
out.  It also parses the rest of the definition line (definitions with 
end-of-line '\' continuations not included in this sample):

from pyparsing import *
defWithoutParen = "#define" + \
                Word(alphas,alphanums+"_") + \
                ~Literal("(").leaveWhitespace() + \
                Optional(restOfLine)
defWithoutParen.ignore(cStyleComment)

Here's sample code showing how to use this grammar:

sample = """
#define PI 3.141592
#define SUCCESS (href==1)
#define MIN(a,b) a<b ? a : b
#define E 2.71828
/*
#define lockMutex mockLockMutex
*/
#define WIN32
"""
matches = defWithoutParen.searchString(sample)
for m in matches:
    print m

Prints out:
['#define', 'PI', '3.141592']
['#define', 'SUCCESS', '(href==1)']
['#define', 'E', '2.71828']
['#define', 'WIN32', '']

-- Paul




From grahn+nntp at snipabacken.dyndns.org  Tue Nov 28 07:28:59 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 28 Nov 2006 12:28:59 GMT
Subject: Python script and C++
References: <456b83c7$1@clarion.carno.net.au>
	<1164691472.172783.151290@n67g2000cwd.googlegroups.com>
	<pan.2006.11.28.09.12.21.978965@gmx.net>
Message-ID: <slrnemo7ha.34s.grahn+nntp@frailea.sa.invalid>

On Tue, 28 Nov 2006 10:12:23 +0100, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <1164691472.172783.151290 at n67g2000cwd.googlegroups.com>, Ravi Teja
> wrote:
>
>>>     I am new to python  and currently I am working on a traffic simulation
>>> which I plan to define the various agents using scripting. It's kind of like
>>> scripting for non-playable character in games. I am thinking of using python
>>> for this but I am concerned with running time. Is scripting a lot slower
>>> compared to direct implementation in C++? Does compiling the script help in
>>> any way?
>> 
>> Python is perfectly suitable for this use. Python was in use in video
>> games in this way when computers were a lot slower.
>
> There's a difference between simulations and games.  The simulation will
> not always be observed by a human being so it runs as fast as possible.
> In games the speed of NPCs is usually limited to a level the player can
> deal with.

Yeah. Simulation can mean running for a week on the best hardware available,
with the most optimized code you can come up with. And a week may be
acceptable, while two weeks are not.

> But I think Python is fine for such a task.

I am not so sure, but ...

> The only way to find out if
> it may be to slow is writing a prototype and measure.

... this is a good approach.

> Maybe it's a good
> idea to design the API for the "NPCs" independent from the language so you
> can also write them in C++ or another scripting language.

However, if that API requires thousands of calls per second during
simulation time, it doesn't help speed much, because calling C code from
Python is a pretty heavy thing in itself. The big win is when you spend a
lot of uninterrupted CPU time in C code.

One approach is to write the executive engine in C++ (once again: if needed)
and the compiler/configuration subsystem -- the thing that generates the
simulated world -- in Python. That's a perfect place for a flexible,
high-level language.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From g.brandl-nospam at gmx.net  Sat Nov 11 16:09:24 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 11 Nov 2006 22:09:24 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.2105.1163279202.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
Message-ID: <ej5e69$j1q$1@news.albasani.net>

Ron Adam wrote:
> Georg Brandl wrote:
>> Ron Adam wrote:
>>> Michael Hobbs wrote:
>>>
>>>> The same problem that is solved by not having to type parens around the 
>>>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>>>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>>>> months and got very comfortable with just typing the if conditional and 
>>>> hitting return, without any extra syntax. When I came back to Python, I 
>>>> found that I felt annoyed every time I typed the colon, since it 
>>>> obviously isn't required. The FAQ says that the colon increases 
>>>> readability, but I'm skeptical. The indentation seems to provide more 
>>>> than enough of a visual clue as to where the if conditional ends.
> 
>>> I'm not sure why '\'s are required to do multi-line before the colon.
>> 
>> Special cases aren't special enough to break the rules.
>> 
>> Georg
> 
> A bit of a circular answer.
> 
>      Why the rule? -> So not to break the rule?

You proposed to allow leaving off line continuation '\' only in the
"if", "for" and "while" headers. This is a special case in my eyes.

> I would guess this probably is more applicable in this case.
> 
>      Explicit is better than implicit.

Of course, this always applies :)

Georg


From sandra.eloff at gmail.com  Fri Nov 17 19:46:40 2006
From: sandra.eloff at gmail.com (sandra.eloff at gmail.com)
Date: 17 Nov 2006 16:46:40 -0800
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
Message-ID: <1163810800.915170.48580@e3g2000cwe.googlegroups.com>

On Nov 17, 12:07 pm, "walterbyrd" <walterb... at iname.com> wrote:
> I think I have read somewhere that using Python to develop
> web-applications requires some restarting of the Apache server, whereas
> PHP does not.

It depends what you do. CGI's operate much like PHP. mod_python has
auto-reloading (and by implication most frameworks that build on it.) A
poorly designed web application may require a restart. (Some people
also disable auto-reload for production servers for performance
advantages.)

> Also, I seem to remember reading something about PHP being able to
> recover from Apache restarting  more easily than Python.

I can think of no reason why that would be true. Perhaps these are
poorly designed python applications?

> I am not trying to suggest anything here. I'm just asking.

Ask away. The only bad question is an unasked question. Most of us can
act like adults here (although we all forget that from time to time.)

Python is much better suited to writing and mainting large web
applications though. Being both an experienced php and python
programmer, I can tell you I don't use php any more unless I have no
other choice.

-Sandra



From rdiaz02 at gmail.com  Mon Nov  6 06:31:57 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Mon, 6 Nov 2006 12:31:57 +0100
Subject: Learning Python
In-Reply-To: <1162811554.731349.145980@h48g2000cwc.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
	<1162805615.944184.138050@h48g2000cwc.googlegroups.com>
	<mailman.1801.1162806869.11739.python-list@python.org>
	<1162811554.731349.145980@h48g2000cwc.googlegroups.com>
Message-ID: <624934630611060331r7c6cb884h877e5e35fa14e26c@mail.gmail.com>

On 6 Nov 2006 03:12:34 -0800, kaushal <kaushalshriyan at gmail.com> wrote:
> On Nov 6, 2:54 pm, "Jorge Vargas" <jorge.var... at gmail.com> wrote:
> > On 6 Nov 2006 01:33:36 -0800, ArdPy <ard... at gmail.com> wrote:
> >
> >
> >
> > > kaushal wrote:
> > > > Hi
> >
> > > > How do i start Learning Python,is there any reference material which I
> > > > can refer since I dont have
> > > > any programming experience
> >
> > > > Thanks and Regards
> >
> > > > Kaushal
> >
> > > Hi kaushal,
> >
> > > Look intohttp://diveintopython.org. Dive into python is a really
> > > readable ebook...enjoyEven though that's a great book I don't recomend it for non
> > programmers I think thishttp://docs.python.org/tut/is a better way
> > to start
> >
> > also I'll suggest you start learning other programming languaje before
> > python or else this will be the only one you will code :)
> >
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list
>
> Hi
>
> Just wanted to know how is this URL
> http://www.ibiblio.org/obp/thinkCSpy/
>


Dear Kaushal,

I was going to recommend exactly that one. That is a very nice book,
clearly written, not patronizing (some begginers books seem to fall
easily into the patronizing mode), and covers a lot of ground.

I think dive into python is a great book, but not the best choice if
you have no programming experience. I also think that the tutorial by
Guido van Rossum is not the best place to start if you have no
programming experience.

You can also go to:

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


and, in particular,

http://wiki.python.org/moin/BeginnersGuide/NonProgrammers.



If you are looking for a "book I'll pay money for", I'd recommend
"Core Python Programming", by Chun. It's a thick book, which will keep
you busy for a while, and assumes some programming experience. It may
be a good place to go _after_ you've gone through "How to think like a
computer scientist" and, probably, have looked at some other material.

Good luck,

R.


> Thanks and Regards
>
> Kaushal
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


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


From fredrik at pythonware.com  Wed Nov 22 14:18:13 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 20:18:13 +0100
Subject: utf - string translation
In-Reply-To: <mf19h.1992$%_2.1833@newsfe19.lga>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
Message-ID: <ek27pl$cn7$1@sea.gmane.org>

hg wrote:

> How would you handle the string.maketrans then ?

maketrans works on bytes, not characters.  what makes you think that you 
can use maketrans if you haven't gotten the slightest idea what's in the 
string?

if you want to get rid of accents in a Unicode string, you can do the 
approaches described here

     http://www.peterbe.com/plog/unicode-to-ascii

or here

     http://effbot.org/zone/unicode-convert.htm

which both works on any Unicode string.

</F>



From vania.cIlli at gmail.com  Thu Nov 23 09:28:28 2006
From: vania.cIlli at gmail.com (Vania)
Date: 23 Nov 2006 06:28:28 -0800
Subject: socket.error connection refused
In-Reply-To: <4slngrF10ij2pU1@mid.individual.net>
References: <B58381932.818.38963.1@mxextra>
	<mailman.635.1164284752.32031.python-list@python.org>
	<1164285165.811809.175040@j72g2000cwa.googlegroups.com>
	<4slngrF10ij2pU1@mid.individual.net>
Message-ID: <1164292108.395755.172250@f16g2000cwb.googlegroups.com>

Hi,

the telnet call succeed

Vania

Bjoern Schliessmann ha scritto:

> Vania wrote:
>
> > IOError: [Errno socket error] (10061, 'Connection refused')
>
> What does "telnet www.google.com 80" in some cmd.exe window say? The
> same?
>
> Regards,
>
>
> Bj?rn
>
> -- 
> BOFH excuse #36:
> 
> dynamic software linking table corrupted



From Leo.Kislov at gmail.com  Tue Nov 28 08:31:44 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 05:31:44 -0800
Subject: Dynamic/runtime code introspection/compilation
References: <1164717323.358146.65410@l39g2000cwd.googlegroups.com>
Message-ID: <1164720704.552472.288980@45g2000cws.googlegroups.com>


Thomas W wrote:
> Maybe a stupid subject, but this is what I want to do :
>
> I got some python code stored in a string:
>
> somecode = """
>
> from somemodule import ISomeInterface
>
> class Foo(ISomeInterface):
>     param1 = ...
>     param2 = ....
>
> """
>
> and I want to compile that code so that I can use the Foo-class and
> check what class it extends, in this case ISomeInterface etc. I've
> tried eval, codeop etc. but it doesn't work. Something like this would
> be nice :
>
> from somemodule import ISomeInteface
>
> d = compile(sourcecode)
>
> myfoo = d.Foo()
>
> print ISomeInterface in myfoo.__bases__
>
> Any hints?

Here is hello world program for plugins:

import sys

somecode = """
class Foo:
   param1 = "Hello, world!"
"""

plugin = type(sys)('unknown_plugin') # Create new empty module
exec somecode in plugin.__dict__

print plugin.Foo.param1

  -- Leo



From martin.witte at gmail.com  Tue Nov 14 14:57:28 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 14 Nov 2006 11:57:28 -0800
Subject: Noob | datetime question
In-Reply-To: <mailman.151.1163517739.32031.python-list@python.org>
References: <mailman.151.1163517739.32031.python-list@python.org>
Message-ID: <1163534248.176957.307860@m73g2000cwd.googlegroups.com>



On Nov 14, 4:22 pm, "Demel, Jeff" <Jeff.De... at JavelinDirect.com> wrote:
> I'm having trouble finding exactly what I need by googling, so thought
> I'd try to get a quick answer from the group.  This seems like something
> that should be dead simple.
>
> I need to generate a string value of a date in the format YYYYMMDD that
> is 97 days in the future.  The datetime module is brand new to me, and
> I'm not sure how to do this.  Can someone help me out here?
>
With the datetime module you can do something like:

py> import datetime
py> d = datetime.date.today()
py> print d
2006-11-14
py> d97 = d + datetime.timedelta(days=97)
py> print d97
2007-02-19
py> fmt_d97 = d97.isoformat().replace('-', '')
py> print fmt_d97
20070219

> TIA
>
> -Jeff
> This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.



From kirby.urner at gmail.com  Mon Nov  6 15:41:43 2006
From: kirby.urner at gmail.com (kirby.urner at gmail.com)
Date: 6 Nov 2006 12:41:43 -0800
Subject: Learning Python
In-Reply-To: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
Message-ID: <1162845703.257461.44050@i42g2000cwa.googlegroups.com>


If you have some math knowledge or what to increase it, plus want to
use that knowledge as leverage when it comes to learning a computer
language, in this case Python, may I suggest my CP4E web page and its
many links to math topics, all explored using open source code, mostly
Python but also some J (if you're curious about a really *different*
language):

http://www.4dsolutions.net/ocn/cp4e.html

Kirby
Oregon Curriculum Network
urnerk at Python.org


kaushal wrote:
> Hi
>
> How do i start Learning Python,is there any reference material which I
> can refer since I dont have
> any programming experience
> 
> Thanks and Regards
> 
> Kaushal



From whiterabbott at gmail.com  Wed Nov 29 23:11:35 2006
From: whiterabbott at gmail.com (Dawn Abbott)
Date: Wed, 29 Nov 2006 20:11:35 -0800
Subject: Joining data from three different files to be written into three
	Columns
In-Reply-To: <7.0.1.0.0.20061129233002.05bb3e38@yahoo.com.ar>
References: <bf6723080611291807x5fa33d79y1487eb70156ae903@mail.gmail.com>
	<7.0.1.0.0.20061129233002.05bb3e38@yahoo.com.ar>
Message-ID: <bf6723080611292011v3349dc6ds6ebb2e38ab7bb179@mail.gmail.com>

No, two of the binary data files are integers and the third file is a
float.  The data is large and the binary saves time and space.


On 11/29/06, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
>
> At Wednesday 29/11/2006 23:07, Dawn Abbott wrote:
>
> >I have three files of binary data.  I want to write the three binary
> >data files to one file.  I want the old files to each have their own
> >column in the new file.  This is what I have,
> >
> >f=open('relative_x.INT32','rb')
> >a=array('l')
> >a.fromfile(f,10)
> >g=open('relative_y.INT32','rb')
> >b=array('l')
> >b.fromfile(g,10)
> >data=zip(a,b)
> >for datum in data:
> >...    print ' '.join(datum)
> >...
> >
> >
> >the error I get is expected string, found int
> >I figure that the joint is for strings only does anyone know of a
> >way were I could join the data that would be for ints.
>
> Do you want to write a TEXT representing the binary values?
>
> for datum in data:
>      print ' '.join(map(str,datum))
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar
>
>
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From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 19:35:20 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 01:35:20 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163606284.985813.294550@f16g2000cwb.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<mailman.182.1163566134.32031.python-list@python.org>
	<1163606284.985813.294550@f16g2000cwb.googlegroups.com>
Message-ID: <455bad51$0$26230$426a74cc@news.free.fr>

walterbyrd a ?crit :
> Michael Torrie wrote:
> 
> 
>>Absolutely false.  Most of my standalone, command-line scripts for
>>manipulating my unix users in LDAP are written in PHP, although we're
>>rewriting them in python.
>>
> 
> 
> I would say that you are one of very few who use PHP for sys-admin
> tasks - and even you have switched to Python. In general, it does not
> seem to me that PHP has caught on as a sys-admin language.
> 
> However, as sys-admin scripting langanges go, I would also say that
> Python is far less popular than butt-ugly Perl. Again - just based on
> what I've seen.

Perl is a scripting language. By 'design'. It's meant to be a better 
sh+sed+awk. Python is a general purpose programming language meant to 
fill the gap between shell scripts and C programs. So Perl is obviously 
a better scripting language than Python. The problem is that Q&D 
sys-admin scripts tend to become full-blown apps - and then, Perl starts 
to suck.


From antroy at gmail.com  Thu Nov  9 11:54:00 2006
From: antroy at gmail.com (Ant)
Date: 9 Nov 2006 08:54:00 -0800
Subject: Can not download plugins for jEdit (help!!)
In-Reply-To: <45534800$0$12978$c3e8da3@news.astraweb.com>
References: <1163055167.418011.236870@h48g2000cwc.googlegroups.com>
	<1163066294.697993.148680@h48g2000cwc.googlegroups.com>
	<1163078175.600579.22930@h54g2000cwb.googlegroups.com>
	<45534800$0$12978$c3e8da3@news.astraweb.com>
Message-ID: <1163091240.539019.75620@m73g2000cwd.googlegroups.com>



On Nov 9, 3:27 pm, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Ant wrote:
> > I do use vim more than Python these daysWhat does that mean? Are you referring to all the setup involved with vim?

Whoops! I mean I use vim more than jEdit these days!



From steve at REMOVE.THIS.cybersource.com.au  Tue Nov  7 16:44:57 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 08 Nov 2006 08:44:57 +1100
Subject: Tired of spam, unrelated email?
References: <000601c7029a$7b0a7310$6400a8c0@genesis>
	<mailman.1850.1162931287.11739.python-list@python.org>
Message-ID: <pan.2006.11.07.21.44.57.179169@REMOVE.THIS.cybersource.com.au>

On Tue, 07 Nov 2006 14:28:00 -0600, skip wrote:

>     Tired of spam, unrelated email?
> 
> You mean, like your message?

You know what is really funny?

Due to the vagaries of Usenet, I never received the original piece of spam
at all, so if you hadn't replied to it, I never would have been bothered
by it in the least!

Out of curiosity, do you think the spammer actually reads comp.lang.python?



-- 
Steven.



From tom at t0mb.net  Sat Nov 18 12:13:08 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 17:13:08 +0000
Subject: basic python questions
In-Reply-To: <1163868656.416276.277310@m7g2000cwm.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
Message-ID: <455F3F24.2080609@t0mb.net>

nateastle at gmail.com wrote:
> I have taken the coments and think I have implemented most. My only
> question is how to use the enumerator. Here is what I did, I have tried
> a couple of things but was unable to figure out how to get the line
> number.
>
>   
Try this in the interpreter,

l = [5,4,3,2,1]
for count, i in enumerate(l):
    print count, i


> def Xref(filename):
>     try:
>         fp = open(filename, "r")
>     except:
>         raise "Couldn't read input file \"%s\"" % filename
>     dict = {}
>     line_num=0
>     for words in iter(fp.readline,""):
>         words = set(words.split())
>         line_num = line_num+1
>         for word in words:
>             word = word.strip(".,!?:;")
>             if not dict.has_key(word):
>                 dict[word] = []
>             dict[word].append(line_num)
>     fp.close()
>     keys = sorted(dict);
>     for key in keys:
>         print key," : ", dict[key]
>     return dict
>
> Marc 'BlackJack' Rintsch wrote:
>   
>> In <1163829271.660193.70450 at j44g2000cwa.googlegroups.com>,
>> nateastle at gmail.com wrote:
>>
>>     
>>> def Xref(filename):
>>>     try:
>>>         fp = open(filename, "r")
>>>         lines = fp.readlines()
>>>         fp.close()
>>>     except:
>>>         raise "Couldn't read input file \"%s\"" % filename
>>>     dict = {}
>>>     for line_num in xrange(len(lines)):
>>>       
>> Instead of reading the file completely into a list you can iterate over
>> the (open) file object and the `enumerate()` function can be used to get
>> an index number for each line.
>>
>>     
>>>         if lines[line_num] == "":  continue
>>>       
>> Take a look at the lines you've read and you'll see why the ``continue``
>> is never executed.
>>
>>     
>>>         words = lines[line_num].split()
>>>         for word in words:
>>>             if not dict.has_key(word):
>>>                 dict[word] = []
>>>             if line_num+1 not in dict[word]:
>>>                 dict[word].append(line_num+1)
>>>       
>> Instead of dealing with words that appear more than once in a line you may
>> use a `set()` to remove duplicates before entering the loop.
>>
>> Ciao,
>> 	Marc 'BlackJack' Rintsch
>>     
>
>   



From ndbecker2 at gmail.com  Fri Nov 17 07:41:53 2006
From: ndbecker2 at gmail.com (Neal Becker)
Date: Fri, 17 Nov 2006 07:41:53 -0500
Subject: python on tivo (series2)?
Message-ID: <ejkamh$p46$1@sea.gmane.org>

I'd like to find python for my tivo (series 2).  I believe it runs linux on
mips.  Google found one, but it complained about shared libs when I tried
to run python.  (Unfortunately, it didn't say which libs, and tools like
ldd seem to be missing on the tivo).

I'd rather not have to setup a cross-compilation env myself.



From vasudevram at gmail.com  Thu Nov 16 13:15:06 2006
From: vasudevram at gmail.com (vasudevram)
Date: 16 Nov 2006 10:15:06 -0800
Subject: Has anyone generated Open Office Calc XML files from python
In-Reply-To: <1163700443.697061.47130@e3g2000cwe.googlegroups.com>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
	<1163700443.697061.47130@e3g2000cwe.googlegroups.com>
Message-ID: <1163700905.899704.81920@e3g2000cwe.googlegroups.com>


vj wrote:
> I just found something in perl:
>
> http://tools.openoffice.org/profiling/pod/LogFile/XML.html
>
> Will try and reverse engineer this, unless something like this exists
> in python.
>
> VJ

Isn't generating CSV output suitable to your needs?
Python's CSV module makes that very simple - unless you want to include
images, etc. in the XLS file?

Vasudev
~~~~~~~~~~~~~~~~~~~~~~
Vasudev Ram
Dancing Bison Enterprises
Software consulting and training,
custom software development
http://www.dancingbison.com
http://sourceforge.net/projects/xtopdf
~~~~~~~~~~~~~~~~~~~~~~



From john106henry at hotmail.com  Fri Nov 10 01:15:52 2006
From: john106henry at hotmail.com (John Henry)
Date: 9 Nov 2006 22:15:52 -0800
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<1163015347.164393.74110@i42g2000cwa.googlegroups.com>
	<6ov7l2lb9ip2u5jmd54e2kso1s78fc68bb@4ax.com>
Message-ID: <1163139352.206221.213180@m73g2000cwd.googlegroups.com>

Bill Maxwell wrote:
> On 8 Nov 2006 11:49:07 -0800, "John Henry" <john106henry at hotmail.com>
> wrote:
>
> >
> >John Salerno wrote:
> >> Dan Lenski wrote:
> >>
> >> > So, is there another toolkit I should be looking at?
> >>
> >> I highly recommend wxPython. It's very mature, full-featured, and
> >> portable, and fairly easy to learn as well. I can't really compare it to
> >> other toolkits (not having used any of them, except Tkinter), but it's
> >> definitely one of the most popular and well-supported ones out there.
> >>
> >> http://www.wxpython.org/
> >
> >I highly recommend that you try PythonCard (which sits on top of
> >wxPython).  You can get productive very very quickly.  Take a look at:
> >
> >http://pythoncard.sourceforge.net/walkthrough1.html
>
>
> I took a brief look at PythonCard almost a year ago and got discouraged
> by what I found, so I stopped looking at it.  I've inserted my notes
> from back then, below.  Does anybody know if these things have been
> fixed in the latest release?
>
> Bill
>
>
> =====================================================================
> My notes from Fri Dec-23-2005:
>
> This is a list of gripes I have while trying to learn about PythonCard.
> I'm trying to investigate various GUI builders for Python, and
> PythonCard looks promising, but a lot of things are getting in the way.
>
> I installed yesterday, using this installer:
> PythonCard-0.8.1.FIXED.win32.exe
>
> A)  The very first example in the tutorial is wrong!
>
> 	On this page:  http://pythoncard.sourceforge.net/documentation.html
> 	When you follow this link to try something for the very first time:
>
> 		Getting Started in PythonCard by Dan Shafer:
> 			http://pythoncard.sourceforge.net/walkthrough1.html
>
> 	You quickly see that the minimal.py example doesn't even contain
> this line, even though the tutorial refers to it:
>

I am not sure which one you are referring to but in the
PythonCard\samples\minimal, you will find a minimal.py that says:

#!/usr/bin/python

"""
__version__ = "$Revision: 1.8 $"
__date__ = "$Date: 2005/12/17 15:20:02 $"
"""

from PythonCard import model


class Minimal(model.Background):
    def on_menuFileAbout_select(self, event):
        pass

if __name__ == '__main__':
    app = model.Application(Minimal)
    app.MainLoop()



> 		def on_menuFileAbout_select(self, event):
>
> 	And, of course, if you replace the word "pass" with this, as
> instructed:
>
> 		result = dialog.alertDialog(self, 'It works!', 'Showing Off')
>
> 	it won't run, because the existing "pass" line isn't inside a def
> inside of a class.
>

No, it didn't work because the author forgot to mention that you have
to do a:

from PythonCard import model, dialog

instead of just:

from PythonCard import model

I just tried it and it works.

>
> B)  Is the Notebook widget really supported?
>
> 	In the installed file "changelog.txt" (gets installed as part of
> PythonCard installation), it says:
>
> 		"added Notebook component, PageBackground, and testNotebook
>  		sample"
>
> 	But, the testNotebook sample is nowhere to be found.
>

I haven't come across a need to use Notebook and so I can not say for
sure.  Looking at notebook.py, it appears to be just a simple wrapper
on top of the wxWindow notebook.  I would encourage you to post a
message to the mailing list and ask there.


> 	I looked lots of places, including the main SourceForge web site,
> and on the wiki, here:
>
> 		http://wiki.wxpython.org/index.cgi/PythonCard
>
> 	Both the main website and the wiki seem way out of date, and the
> latest dates I could find on both of them are sometime in 2004.
>

Yes, sometime around 2004, the website updating stopped.   Fortunately,
development didn't.  There are quite a number of new things since then:
new resource editor (now call layout Editor, standalone exe creator,
and so forth).  I even learn that a new sizer handler is in the work.

Not saying that there are 10 programmers working 7/24 on it.  It *is*
an Open Source project nevertheless.   Nobody gets paid for doing it.
 But there are development work going on.


> 	Finally, by following the mailing list archive link on the main
> website, I managed to find a reference to the notebook component on the
> ASPN site, where some guy named Brian wonders about the same thing as
> me, concerning the availability of the notebook component:
>
> 		http://aspn.activestate.com/ASPN/Mail/Message/pythoncard/2536825
>
> 	and, that message led me here:
>
> 		http://article.gmane.org/gmane.comp.python.pythoncard/1060
>
> 	where Kevin Altis admits that he forgot to include it in the 0.8.1
> release!  At least he provides a way to download it separately.  But,
> gheesh, this is pretty poor for a new user.  I was interested in using
> the notebook component right away, because I looked at the wxGlade
> tutorial before looking at PythonPage, and they use the notebook
> component in their example (and I decided I really want to use the
> component).
>
> 	To add insult to injury, after you download the zip file with the
> testNotebook stuff, the readme file says this:
>
> 		"Until we have a Notebook integrated into some of the other
> samples or tools this will serve as a basic test app, but I don't expect
> to include it in releases."
>


As with all Open Source projects, your mileage differs.   PythonCard
does what *I* need to get done - and allowed me to get it done in a
*hurry*.  May be you really need Notebook and may be it's true that
Notebook really doesn't work, I don't know.   But if you managed to get
it working, write it up and get it included.  That's what Open Source
Projects are all about.


> C)  Are the websites being maintained?


It appears that the maintainer of the web site stopped updating it
since late 2004.  I don't know why.   May be he's been busy.  May be he
got mad.  I don't know.   All I know is that I have been very
productive with what I need to get done (and earned a happy living with
the code I created) and I am very grateful to the people that worked on
it - past and present.

I am not a "professional programmer" and so I probably can't contribute
to the development effort itself.   However, I've gotten pretty good in
using most of the package (other then Notebook, I admit).  So, if you
have any specific questions, please post it to the PythonCard list and
I'll try to help if I can.

Cheers.



From paul at boddie.org.uk  Tue Nov 14 16:36:41 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Nov 2006 13:36:41 -0800
Subject: BaseHTTPServer - getting POST parameters
References: <1163538035.160424.3470@e3g2000cwe.googlegroups.com>
Message-ID: <1163540201.380605.16090@k70g2000cwa.googlegroups.com>

Vlad Dogaru wrote:
>
> After experimenting for a while, I am still not able to find where the
> POST data is in the BaseHTTPRequestHandler class. I am trying to write
> a very simple HTTP server for a project of mine and I need to get the
> POST data. Certainly I am missing something, as it is a comon task.

The way I've done this previously is to access the rfile attribute on
instances of the BaseHTTPRequestHandler class, since this provides the
body of each request (where POST data comes from) as a stream. Data
read from the stream can be processed by things like cgi.parse or
cgi.FieldStorage, although you may need to provide other data to those
things in order to simulate the CGI environment properly.

An alternative is to use WebStack's BaseHTTPRequestHandler support:

http://www.python.org/pypi/WebStack

Paul



From martin at v.loewis.de  Fri Nov 17 00:59:36 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Fri, 17 Nov 2006 06:59:36 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <mailman.294.1163721712.32031.python-list@python.org>
References: <mailman.294.1163721712.32031.python-list@python.org>
Message-ID: <455d4fc9$0$18480$9b622d9e@news.freenet.de>

Jean-Paul Calderone schrieb:
>> How would you propose listdir should behave?
> 
> Umm, just a wild guess, but how about raising an exception which includes
> the name of the file which could not be decoded?

There may be multiple of these, of course, but I assume that you want
it to report the first one it encounters?

Regards,
Martin


From bignose+hates-spam at benfinney.id.au  Tue Nov 21 20:29:25 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 22 Nov 2006 12:29:25 +1100
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<87fyccwacn.fsf@benfinney.id.au>
Message-ID: <877ixow9oq.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> Or, the attributes are added to a specific instance (often in the
> initialisation method) so that each instance has a separate attribute
> with the same name::

The example here should have been::

    class Point(object):
        spam = 4
        def __init__(self):
            self.eggs = 2

-- 
 \      "For mad scientists who keep brains in jars, here's a tip: why |
  `\    not add a slice of lemon to each jar, for freshness?"  -- Jack |
_o__)                                                           Handey |
Ben Finney



From paul at boddie.org.uk  Wed Nov 15 10:57:23 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Nov 2006 07:57:23 -0800
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
Message-ID: <1163606243.523644.206490@e3g2000cwe.googlegroups.com>

walterbyrd wrote:
>
> The problem is that the system requirements for django and turbogears
> are sky-high. I think Django requires Apache 2.0 (and maybe mod_python
> 3.x), and CherryPy (part of turbogears) requires Python 2.4. If you are
> developing for a hosted environment, this can be a big problem. Few
> enough hosters provide python to begin with, then add to that such
> requirements as apache 2.0 - and you left with almost nothing.

I guessed that this was what you meant by "PHP has a lower barrier to
entry", even though others chose to interpret that in the context of
how easy or consistent the technology would seem to be in comparison
with Python. While it's true that PHP seems to be widely available, and
the newcomer can probably get immediate results by just publishing a
few files, the availability of relatively inexpensive virtual server
hosting seems to undermine claims that no-one supports Python together
with a modern selection of server programs.

I've been tempted to get some "dynamic" hosting at some point, and the
major difference between now and the last time I looked into this
(possibly about three or so years ago), is that back then you had to
spend a fair amount of money to get anything other than an
inconveniently accessible CGI directory requiring a version of
cgipython that could run on the inconveniently chosen version of
FreeBSD so beloved of certain hosting providers. Now, you can get a
virtual server populated with your own GNU/Linux distribution, or if
that sounds like too much work, there's a choice of hosting providers
that support Python plus certain servers "out of the box".

Things seem to have moved on, and very much for the better, too.

Paul



From jmcmonagle at velseis.com.au  Tue Nov 14 21:26:08 2006
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Wed, 15 Nov 2006 12:26:08 +1000
Subject: Tkinter: Strange behavior using place() and changing cursors
In-Reply-To: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
References: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
Message-ID: <1163557568.11836.2.camel@kuepper.vels-int.com.au>

Mudcat wrote:
> Is there something I'm supposed to do in order
> to prevent this from happening?

Yes.  Instead of configuring the cursor on the frame, do it on the master:

self.master.configure(cursor='sb_h_double_arrow')




-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From fredrik at pythonware.com  Sun Nov 19 07:53:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 13:53:56 +0100
Subject: ElementTree: namespace declaration in each element?
In-Reply-To: <1163939038.754792.48730@e3g2000cwe.googlegroups.com>
References: <1163939038.754792.48730@e3g2000cwe.googlegroups.com>
Message-ID: <ejpk57$faa$2@sea.gmane.org>

cyberco wrote:

> Unfortunately the client that needs to consume this XML can't handle
> the 'ns0:' part of each tag.

 > Is there a way to output XML similar to the input?

written by a "it's the bytes, not the data" guy, obviously ;-)

the standard serializer in 1.2 doesn't support default namespaces, so 
the quickest way to do this is to loop over all tags (use getiterator), 
strip off the "{http://xspf.org/ns/0/}" prefix, add an xmlns attribute 
to the root (if necessary), and write it out.

</F>



From no-spam at no-spam-no-spam.invalid  Fri Nov  3 17:29:52 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 03 Nov 2006 23:29:52 +0100
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1725.1162576308.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>	<eidcb3$op2$1@news.albasani.net>	<mailman.1678.1162491833.11739.python-list@python.org>	<eiden1$sj0$1@news.albasani.net>	<eifg8f$96s$1@wake.carmen.se>	<mailman.1715.1162568469.11739.python-list@python.org>	<eifub5$ak9$1@news.albasani.net>
	<mailman.1725.1162576308.11739.python-list@python.org>
Message-ID: <eigft2$3u7$1@news.albasani.net>

Robert Kern wrote:
> This is what Martin said:
> 
> """
> It used to be possible to link with it. See
> 
> http://msdn2.microsoft.com/en-us/library/abx4dbyh(VS.80).aspx
> 
> This is now a "known DLL", and meant for use by system-level components
> only.
> """
> 
> Note the words "used to" and "now". Mingw is a somewhat old project and 
> was initially developed at a time when MSVCRT.dll *was* intended to be 
> used by applications. It simply hasn't received enough attention 
> recently to move to a different runtime. If you would like to volunteer 
> your time to do the necessary work to allow it to link to modern 
> runtimes, please do so. You will receive the undying thanks of many, 
> many Pythoneers.

thanks, but I'm more in favor of the reverse direction :-) 
As I have a lot to do with frozen distributables, package sizes are still a predominant concern for me. App-startup speed, MEM consumption etc. also - still. 
Having non-standard C-RTLs and maybe non-standard versions of the MFC dll's, doubled Python-DLL sizes etc. one has an extra burden of >3MB since Python2.4.
This means for me: Python2.3 - or create very proprietary compilations.

robert


From moonbee5555555555 at yahoo.com  Thu Nov 30 12:46:20 2006
From: moonbee5555555555 at yahoo.com (Boneh)
Date: 30 Nov 2006 09:46:20 -0800
Subject: Tkinter
Message-ID: <1164908779.941142.242400@80g2000cwy.googlegroups.com>

The module is not found on the system, althouhg I can use python2.4. i
am using fedoralinux5

Thanks



From egbert.bouwman at hccnet.nl  Thu Nov 30 04:50:08 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Thu, 30 Nov 2006 10:50:08 +0100
Subject: SPE refuses.
In-Reply-To: <1164842145.465496.135210@h54g2000cwb.googlegroups.com>
References: <mailman.846.1164826327.32031.python-list@python.org>
	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>
	<mailman.857.1164838885.32031.python-list@python.org>
	<1164842145.465496.135210@h54g2000cwb.googlegroups.com>
Message-ID: <20061130095007.GA5240@hccnet.nl>

On Wed, Nov 29, 2006 at 03:15:45PM -0800, SPE - Stani's Python Editor wrote:
> Do you have python-wxversion installed?
> 
> $sudo apt-get install python-wxversion
> 
That helped. But why isn't it included in the wxPython download ?
Anyway, the first screen looks great. I will explore spe.
Thanks.
e.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From danielkleinad at gmail.com  Sat Nov 18 09:34:43 2006
From: danielkleinad at gmail.com (Daniel Klein)
Date: Sat, 18 Nov 2006 14:34:43 GMT
Subject: Having trouble converting popen2 to subprocess
References: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>
	<mailman.415.1163858632.32031.python-list@python.org>
Message-ID: <uc6ul2pvi2gto6arfqkgdcesbqp16jfqms@4ax.com>


Thanks /F, that was it.

Dan

On Sat, 18 Nov 2006 15:03:30 +0100, Fredrik Lundh
<fredrik at pythonware.com> wrote:

[snip]

>p.stdin is the *other* process' stdin.  if you want to read things it 
>prints, read from p.stdout instead.
>
>> print fin.readline()
>> fin.close()
>
></F>


From korvus at gmail.com  Thu Nov 16 19:26:15 2006
From: korvus at gmail.com (Jeff  Poole)
Date: 16 Nov 2006 16:26:15 -0800
Subject: cPickle problems
In-Reply-To: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
Message-ID: <1163723175.530850.185990@m73g2000cwd.googlegroups.com>

Oh, and I suppose I should provide some version information:

$ python
Python 2.4.3 (#1, May 18 2006, 07:40:45)
[GCC 3.3.3 (cygwin special)] on cygwin


Jeff  Poole wrote:
> This is going to be a pretty vague message because it involves a large
> block of code I'd rather avoid posting.  Basically, I've been pickling
> a dictionary of instances of a class I've created (which contains
> references to other instances of other classes).  At some point in the
> last few weeks, pickling has stopped working with the following error:
>
> Traceback (most recent call last):
>   File "./generateTools.py", line 50, in ?
>     proj.findVHDLfiles("vhd")
>   File "/cygdrive/c/fpga/tools/FPGAProject.py", line 630, in
> findVHDLfiles
>     cpickle.dump(filenameToClassDic,pickleFile,PICKLE_FILE_PROTOCOL)
>   File "/usr/lib/python2.4/copy_reg.py", line 83, in _reduce_ex
>     dict = getstate()
> TypeError: 'str' object is not callable
>
>
> Does anyone have any idea why this might be failing in this way?  It's
> driving me crazy.  If need be I can probably provide the code to the
> class, though it's about 1000 lines, most of which is PyParsing code.
> I appreciate any help you guys can provide.
> 
> 
> Jeff



From fredrik at pythonware.com  Sat Nov 18 13:12:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 19:12:24 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <E7DA9C0B-283D-408D-92EC-A05E747E945E@snowtide.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<ejmm4d$guk$1@sea.gmane.org>	<894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>	<ejncck$9eg$1@sea.gmane.org>
	<E7DA9C0B-283D-408D-92EC-A05E747E945E@snowtide.com>
Message-ID: <ejnie7$q6k$1@sea.gmane.org>

Chas Emerick wrote:

> Further, the fact that ET/lxml works the way that it does makes me  
> think that there may be some other landmines in the underlying model  
> that we might not have discovered until some days, weeks, etc., had  
> passed

so the real reason you posted your original post was to spread some FUD, 
not to get help?  that's a bit disappointing.

</F>



From fredrik at dolda2000.com  Thu Nov 30 19:50:44 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Fri, 01 Dec 2006 01:50:44 +0100
Subject: String formatters with variable argument length
In-Reply-To: <1164932769.210948.289560@f1g2000cwa.googlegroups.com>
References: <mailman.905.1164931966.32031.python-list@python.org>
	<1164932769.210948.289560@f1g2000cwa.googlegroups.com>
Message-ID: <1164934244.19678.39.camel@pc7.dolda2000.com>

On Thu, 2006-11-30 at 16:26 -0800, John Machin wrote:
> Fredrik Tolf wrote:
[...]
> > The thing is, I want to get format strings from the user, and I don't
> > want to require the user to consume all the arguments. docs.python.org
> > doesn't seem to have any clues on how to achieve this, and I can't think
> > of what to google for.
> 
> Three approaches spring to mind. In descending order of my preference:
> 
> (a) don't do that

It would be a possibility, since all current uses actually do have the
right number of parameters. I would just like to keep the option
available.

> (b) parse the format string, counting the number of args required. If
> the user has supplied more, throw them away.

I was thinking of that, but it just seems far too ugly.

> (c) wrap your execution of format_string % args in a try/except
> bracket. If you get a TypeError with that message [not guaranteed to
> remain constant in the future], throw away the last arg and go around
> again.

That might be a good possibility. Thanks for the idea! I do consider it
quite a bit ugly, but that often happens when languages try to police
programmers... :P

> As a matter of curiosity, why don't you want the user to consume all
> the arguments? Don't they get even a teensy-weensy warning message? Are
> you writing a Perl interpreter in Python?

Well basically, I'm rewriting a autodownloader for a file-sharing
network in Python (previously written as a bash script, using the printf
command), and I have a number of files scattered over my hard drive
specifying search expressions, into which a potentially optional episode
number can be inserted using sprintf-like arguments (using
fsexpr="`printf "$sexpr" "$curep"`" in bash). I would like to keep it as
a printf parameter, in order to be able to write e.g. %02i, and I would
like to keep it optional, for downloading non-episoded stuff.

I couldn't help noticing that the named variant of the % operator (using
a dict, that is) doesn't require all its arguments to be consumed. Using
that would require me to rewrite *all* the existing files, though.

Anyway, thanks!

Fredrik Tolf




From gagsl-py at yahoo.com.ar  Thu Nov  9 14:03:13 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 09 Nov 2006 16:03:13 -0300
Subject: directpython object move
In-Reply-To: <1163095289.208707.183600@f16g2000cwb.googlegroups.com>
References: <1163095289.208707.183600@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061109160203.0415d318@yahoo.com.ar>

At Thursday 9/11/2006 15:01, vedran at v-programs.com wrote:

>How can I move objects in directpython???

I suggest you post directpython questions on its specific mailing 
list, see the SourceForge project page.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From st911 at rock.com  Thu Nov 30 21:50:46 2006
From: st911 at rock.com (st911 at rock.com)
Date: 30 Nov 2006 18:50:46 -0800
Subject: *** A BRIEF summary of criminal methods used by FBI Mother Fuckers ***
Message-ID: <1164941446.164218.223190@j72g2000cwa.googlegroups.com>

http://www.monitor.net/monitor/9905a/jbcointelpro.html

just search google for cointelpro


A Short History of FBI COINTELPRO

by Mike Cassidy and Will Miller
The FBI and police used secret and systematic methods of fraud and
force
		[Editor's note: More information on COINTELPRO in the Bari case is
available at the Monitor Judi Bari index. Much of the following was
taken from Brian Glick's book War At Home: Covert Action Against U.S.
Activists and What We Can Do About It, (South End Press; Boston, 1989),
a source for detailed and documented information on the history of
domestic covert action against movements for social change.]


In early 1971, the FBI's domestic counterintelligence program (code
named "COINTELPRO") was brought to light when a "Citizens Committee to
Investigate the FBI" removed secret files from an FBI office in Media,
PA and released them to the press. Agents began to resign from the
Bureau and blow the whistle on covert operations. That same year,
publication of the Pentagon Papers, the Pentagon's top-secret history
of the Vietnam War, exposed years of systematic official lies about the
war.

Soon after, it was discovered that a clandestine squad of White House
"plumbers" broke into Daniel Ellsberg's psychiatrist's office in an
effort to smear the former Pentagon staffer who leaked the top-secret
papers to the press. The same "plumbers" were later caught burglarizing
the Watergate offices of the Democratic National Committee. By the
mid-1970's Senate and House committees launched formal and lengthy
inquiries into government intelligence and covert activities. These
investigations revealed extensive covert and illegal
counterintelligence programs involving the FBI, CIA, U.S. Army
intelligence, the White House, the Attorney General, and even local and
state law enforcement, directed against opponents of government
domestic and foreign policy. Since then, many more instances of these
"dirty tricks" have been revealed.

When congressional investigations, political trials and other
traditional legal methods of repression failed to counter the growing
movements of the 1950s, '60s and '70s, and even helped fuel them, the
FBI and police moved outside the law. They used secret and systematic
methods of fraud and force, far beyond mere surveillance, to sabotage
constitutionally protected political activity. The purpose of the
program was, in FBI Director J. Edgar Hoover's own words, to "expose,
disrupt, misdirect, discredit and otherwise neutralize" specific groups
and individuals. Its targets in this period included the American
Indian Movement, the Communist Party, the Socialist Worker's Party,
Black Nationalist groups, and many members of the New Left (SDS, and a
broad range of anti-war, anti-racist, feminist, lesbian and gay,
environmentalist and other groups). Many other groups and individuals
seeking racial, gender and class justice were targets who came under
attack, including Martin Luther King, Cesar Chavez, the NAACP, the
National Lawyer's Guild, SANE-Freeze, American Friends Service
Committee, and many, many others.


The Reagan Administration reinvigorated covert action
		The public exposure of COINTELPRO and other government abuses
resulted in a flurry of apparent reform in the 1970s, but domestic
covert action did not end. It has persisted, and seems a permanent
feature of our government. Much of today's domestic covert action can
also be kept concealed because of government secrecy that has been
restored. The Freedom of Information Act (FOIA), a source of major
disclosures of COINTELPRO and other such activities, was drastically
narrowed in the 1980s through administrative and judicial
reinterpretation, as well as legislative amendment. While restoring
such secrecy, the Reagan Administration also reinvigorated covert
action, embracing its use at home and abroad. They endorsed it,
sponsored it, and even legalized it to a great extent.

Much of what was done outside the law under COINTELPRO was later
legalized by Executive Order 12333 (12/4/81). There is every reason to
believe that even what was not legalized is still going on as well.
Lest we forget, Lt. Col. Oliver North funded and orchestrated from the
White House basement break-ins and other "dirty tricks" to defeat
congressional critics of U.S. policy in Central America and to
neutralize grassroots protest. Special Prosecutor Walsh found evidence
that North and Richard Secord (architect of the 1960s covert actions in
Cambodia) used Iran-Contra funds to harass the Christic Institute, a
church-funded public interest group specializing in exposing government
misconduct.

North also helped other administration officials at the Federal
Emergency Management Administration develop contingency plans for
suspending the Constitution, establishing martial law, and holding
political dissidents in concentration camps in the event of "national
opposition against a U.S. military invasion abroad." There were reports
of similar activities and preparations in response to the opposition to
the Gulf War in 1991. Even today, there is pending litigation against
the FBI involving alleged misconduct in connection with the near-fatal
bombing of Judi Bari.


Domestic Covert Action Methods
		Although covert action will be adapted to changing social and
technological conditions, only a limited number of methods exist. A
study of COINTELPRO revealed four basic approaches.

    * First, there was infiltration. Agents and informers did not
merely spy on political activists. The main purpose was to discredit
and disrupt. Their presence served to undermine trust and scare off
potential supporters. They also exploited this fear to smear genuine
activists as agents.

    * Second, there was psychological warfare from the outside. They
planted false media stories and published bogus leaflets and other
publications in the name of targeted groups. They forged
correspondence, sent anonymous letters, and made anonymous telephone
calls. They spread misinformation about meetings and events, set up
pseudo movement groups run by agents, and manipulated or strong-armed
parents, employers, landlords, school officials and others to cause
trouble for activists.

    * Third, there was harassment through the legal system, used to
harass dissidents and make them appear to be criminals. Officers gave
perjured testimony and presented fabricated evidence as a pretext for
false arrests and wrongful imprisonment. They discriminatorily enforced
tax laws and other government regulations and used conspicuous
surveillance, "investigative" interviews, and grand jury subpoenas in
an effort to intimidate activists and silence their supporters.

    * Fourth and finally, there was extralegal force and violence. The
FBI and police threatened, instigated and conducted break-ins,
vandalism, assaults, and beatings. The object was to frighten
dissidents and disrupt their movements. In the case of radical Black
and Puerto Rican activists (and later Native Americans), these attacks,
including political assassinations, were so extensive, vicious, and
calculated that they can only be accurately called a form of official
"terrorism."

For details, along with many examples of each of these methods, read
Glick's well-documented and heavily footnoted "War At Home."


reprinted with permission

Mike Cassidy is a civil rights attorney and Will Miller is a Professor
of Philosophy at U. of Vermont
Comments? Send a letter to the editor.

Albion Monitor May 26, 1999 (http://www.monitor.net/monitor)

All Rights Reserved.

Contact rights at monitor.net for permission to use in any format.



From beliavsky at aol.com  Sat Nov 18 19:54:37 2006
From: beliavsky at aol.com (Beliavsky)
Date: 18 Nov 2006 16:54:37 -0800
Subject: Finding skilled pythonistas for micro-jobs?
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
Message-ID: <1163897677.460353.69700@e3g2000cwe.googlegroups.com>

I have gotten some Python tasks done at http://www.rentacoder.com.
Progammers are cheaper outside the U.S. and Western Europe, and you can
get a lot done for even $100.



From meshael323 at hotmail.com  Sat Nov 18 15:52:52 2006
From: meshael323 at hotmail.com (youtube333)
Date: 18 Nov 2006 12:52:52 -0800
Subject: Amazing !!!
Message-ID: <1163883172.280423.292490@j44g2000cwa.googlegroups.com>

Priests & Preachers Coming to Islam?

Former  American Priest tells his story : 

http://islamtomorrow.com



From sjmachin at lexicon.net  Fri Nov 17 05:18:57 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 02:18:57 -0800
Subject: Bitwise operators. Differences from javascript and PHP.
In-Reply-To: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
References: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
Message-ID: <1163758737.890309.21950@e3g2000cwe.googlegroups.com>


skoroboga... at gmail.com wrote:
> I can't understand a little thing in bitwise operations.
>
>
> In PHP and Javascript
> 4653896912>>13 = -212992
>
> In Python and Ruby
> 4653896912>>13 = 568102
>
> In Python and Ruby - it's ok. I understand.
> But i need to get in Python same value as in PHP and Javascript.
> How can i do this?

So that someone who knows next-to-nothing about those 2 languages can
help you, what is x >> n defined to do in PHP and Javascript?

If you can answer that question, what part of the Python implementation
of the PHP/Javascript definition are you having trouble with?

If you can't answer it ... is the problem caused by the fact that
4653896912 is, at 9 hex digits, a bit large for a 32-bit integer, those
2 languages don't have longer integers [my guess],
*and*, to quote something I found about PHP while googling,

http://theopensourcery.com/phplogic.htm

"In effect the bitwise operations [words "can be" omitted, I presume]
safely applied to integer variables - their effect on booleans,
float/double or string variables can be predicted but are not really
useful" ???

Cheers,
John



From fredrik at pythonware.com  Wed Nov 15 12:35:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 18:35:57 +0100
Subject: Yield
In-Reply-To: <ejfij1$bd$1@sea.gmane.org>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<ejfij1$bd$1@sea.gmane.org>
Message-ID: <ejfj5s$2e1$1@sea.gmane.org>

Fredrik Lundh wrote:

> reference information:

also see:

http://effbot.org/pyfaq/what-is-a-generator.htm

</F>



From vd12005 at yahoo.fr  Sat Nov  4 02:39:21 2006
From: vd12005 at yahoo.fr (vd12005 at yahoo.fr)
Date: 3 Nov 2006 23:39:21 -0800
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <1162616047.891549.29550@b28g2000cwb.googlegroups.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>
	<mailman.1735.1162581960.11739.python-list@python.org>
	<7xvelwib1b.fsf@ruckus.brouhaha.com>
	<mailman.1739.1162583532.11739.python-list@python.org>
	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>
	<1162616047.891549.29550@b28g2000cwb.googlegroups.com>
Message-ID: <1162625961.267184.129220@b28g2000cwb.googlegroups.com>


so it still unfinished :) around 1GB for 1033268 words :) (comes from a
top unix command)

Paul > i was also thinking on doing it like that by pip-ing to 'sort |
uniq -c | sort -nr' , but i'm pleased if Python can handle it. (well
but maybe Python is slower? will check later...)

Klaas > i do not know about intern construct, i will have look, but
when googling i first found a post from Raymond Hettinger so i'm going
to mess my mental space :)
http://mail.python.org/pipermail/python-dev/2003-November/040433.html

best regards.



From fredrik at pythonware.com  Sat Nov  4 02:39:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 04 Nov 2006 08:39:17 +0100
Subject: Having trouble with file modes
In-Reply-To: <1162589705.515424.288140@b28g2000cwb.googlegroups.com>
References: <1162585293.671650.94910@k70g2000cwa.googlegroups.com>	<1162587613.376486.298340@h54g2000cwb.googlegroups.com>
	<1162589705.515424.288140@b28g2000cwb.googlegroups.com>
Message-ID: <eihg34$s4p$1@sea.gmane.org>

erikcw wrote:

> To make it write over the data, I ended up adding, which seems to work
> fine.
> 
> f = open('_i_defines.php', 'w+')

that doesn't work; you need to use "r+" if you want to keep the original 
contents.

"w+" means truncate first, update then:

 >>> f = open("foo.txt", "r")
 >>> f.read()
'hello\n'
 >>> f.close()

 >>> f = open("foo.txt", "r+")
 >>> f.read()
'hello\n'
 >>> f.close()

 >>> f = open("foo.txt", "w+")
 >>> f.read()
''

the standard approach when updating text files is to create a *new* 
file, though:

     fi = open(infile)
     fo = open(infile + ".tmp", "w")

     filter fi to fo

     fo.close()
     fi.close()

     if os.path.exists(infile + ".bak")
         os.remove(infile + ".bak")
     os.rename(infile, infile + ".bak")
     os.rename(infile + ".tmp", infile)

this leaves the old file around with a .bak extension, which is nice
if something goes wrong during filtering.

</F>



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov  4 00:23:29 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 04 Nov 2006 16:23:29 +1100
Subject: Timing a function object versus timeit
References: <pan.2006.11.04.01.44.21.971767@REMOVE.THIS.cybersource.com.au>
	<1162605757.774426.230750@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.04.05.23.28.630181@REMOVE.THIS.cybersource.com.au>

On Fri, 03 Nov 2006 18:02:37 -0800, Carl Banks wrote:

>>>> import timeit
>>>> timeit.Timer("foo(1)","from __main__ import foo")
> 1.1497418880462646


Well, that was scarily simple. 

Thank you.


-- 
Steven.



From fredrik at pythonware.com  Fri Nov  3 02:58:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 08:58:36 +0100
Subject: Javascript is turning into Python?!
In-Reply-To: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
References: <7xwt6dkn50.fsf@ruckus.brouhaha.com>
Message-ID: <eiesrc$41c$1@sea.gmane.org>

Paul Rubin wrote:

> I hadn't seen this before.  New Javascript 1.7 features:
> 
> - Generators
> - Iterators
> - Array comprehensions
> - Destructuring assignment
> 
> Sounds like another language we know.
> 
> http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7

http://weblogs.mozillazine.org/roadmap/archives/2006/02/js_and_python_news.html

   > Given the years of development in Python and similarities to
   > ECMAScript in application domains and programmer communities, we would
   > rather follow than lead. By standing on Python's shoulders we reuse
   > developer knowledge as well as design and implementation experience.
   > The trick then becomes not borrowing too much from Python, just enough
   > to gain the essential benefits: structured value-generating
   > continuations and a general iteration protocol.

</F>



From sjmachin at lexicon.net  Thu Nov 23 05:20:06 2006
From: sjmachin at lexicon.net (John Machin)
Date: 23 Nov 2006 02:20:06 -0800
Subject: How do I find possible matches using regular expression?
In-Reply-To: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
Message-ID: <1164277206.141077.242670@m7g2000cwm.googlegroups.com>


Andy wrote:
> Hi there,
>
> I'm trying to do some predicting work over user input, here's my
> question:
>
> for pattern r'match me', the string 'no' will definitely fail to match,
> but 'ma' still has a chance if user keep on inputting characters after
> 'ma', so how do I mark 'ma' as a possible match string?
>

The answer is: Using regular expressions doesn't seem like a good idea.
If you want to match against only one target, then
target.startswith(user_input) is, as already mentioned, just fine.
However if you have multiple targets, like a list of computer-language
keywords, or the similar problem of an IME for a language like Chinese,
then you can set up a prefix-tree dictionary so that you can search the
multiple target keywords in parallel. All you need to do is keep a
"finger" pointed at the node you have reached along the path; after
each input character, either the finger gets pointed at the next
relevant node (if the input character is valid) or you return/raise a
failure indication.

HTH,
John



From jstroud at mbi.ucla.edu  Wed Nov  8 15:59:00 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 08 Nov 2006 20:59:00 GMT
Subject: tkFileDialog
In-Reply-To: <mailman.1925.1163015696.11739.python-list@python.org>
References: <mailman.1925.1163015696.11739.python-list@python.org>
Message-ID: <oyr4h.1072$GS2.115@newssvr14.news.prodigy.com>

Gheorghe Postelnicu wrote:
> ---------- Forwarded message ----------
> From: cdroulers at hotmail.com
> To: python-list at python.org
> ********************************************
> import tkFileDialog
> file = tkFileDialog.askopenfile()
> print file
> ********************************************

Its ill-advised to assign to built in types (e.g. "file").

> It prints the opened files stuff, but I just can not find how to get
> that path as a string. I've searched around google and the present
> group, and found no documentation on the file class used with
> tkFileDialog. Does someone have a solution for that?

import tkFileDialog
afile = tkFileDialog.askopenfile()
print afile.name

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From mkengel at gmail.com  Tue Nov 21 22:20:32 2006
From: mkengel at gmail.com (mkengel)
Date: 21 Nov 2006 19:20:32 -0800
Subject: Caution newbie question: python window to stay open ?
Message-ID: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>

Caution: newbie question

I am using python 2.4.3-11 on Windows XP.
Problem: Python window closes immediately after executing a *.py file
(e.g. containing a "print..." command.
What do I have to do to keep it open to see the results ?

"Interactive window" stays open.

Thank you.
Michael



From paddy3118 at netscape.net  Fri Nov 17 01:11:56 2006
From: paddy3118 at netscape.net (Paddy)
Date: 16 Nov 2006 22:11:56 -0800
Subject: python and accessibility issues.
References: <mailman.280.1163701244.32031.python-list@python.org>
Message-ID: <1163743916.142771.92910@m7g2000cwm.googlegroups.com>


krishnakant Mane wrote:

> this question is streight forward, short and sweet.
> I am developing some applications and being blind myself, expect that
> including me, all other blind people must be able to use it.
> so my question is,
> is wx python complying with Microsoft Active Accessibility or MSAA for short?
> I will use wx python or any other gui library that is having support
> for MSAA built in.
> thanking all.
> Krishnakant.
wxpython is based on wxwindows which has a statement on accessability
here: http://www.wxwindows.org/docs/access.htm

That page has links to their forums which might be able to provide you
with more information.

- Paddy.



From phil_nospam_schmidt at yahoo.com  Thu Nov 23 20:18:02 2006
From: phil_nospam_schmidt at yahoo.com (Phil Schmidt)
Date: 23 Nov 2006 17:18:02 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
Message-ID: <1164331082.270046.290720@l39g2000cwd.googlegroups.com>

Brian Blais wrote:

> So my recommendation for a (nearly) complete Matlab replacement would be:
> 	python
> 	numpy
> 	scipy
> 	matplotlib
> 	pyrex
>


Brian,

Thanks for that list. I'm currently in the process of getting quotes
for a bunch of Matlab tools for hardware-in-the-loop simulation. Big
bucks.

I'd love to use Python, but I'm not comfortable with the hardware side
of that. I'm certain that most, if not all data acquisition hardware
comes with DLL drivers, which I could interface with using ctypes. I'm
concerned though about spending more time messing around with the
hardware interface than it's worth.

Do you have any experience with this side of the Matlab replacement
question? How about anyone else? Any recommendations?

Thanks,
Phil



From wyldwolf at gmail.com  Tue Nov 14 10:33:48 2006
From: wyldwolf at gmail.com (Kevin Kelley)
Date: Tue, 14 Nov 2006 09:33:48 -0600
Subject: Noob | datetime question
In-Reply-To: <136ED738BD4F1545B97E4AC06FF6370734BFB6@DMSP-MSG-EVS01.mail.pvt>
References: <136ED738BD4F1545B97E4AC06FF6370734BFB6@DMSP-MSG-EVS01.mail.pvt>
Message-ID: <77895c1d0611140733y1ab3d28dr8e542d51438a2cc@mail.gmail.com>

import time
FORMAT='%Y%m%d'

time.strftime(FORMAT,time.gmtime(time.time()+8380800))
output = '20070219'

--
Kevin Kelley

On 11/14/06, Demel, Jeff <Jeff.Demel at javelindirect.com> wrote:
>
> I'm having trouble finding exactly what I need by googling, so thought
> I'd try to get a quick answer from the group.  This seems like something
> that should be dead simple.
>
> I need to generate a string value of a date in the format YYYYMMDD that
> is 97 days in the future.  The datetime module is brand new to me, and
> I'm not sure how to do this.  Can someone help me out here?
>
> TIA
>
> -Jeff
> This email is intended only for the individual or entity to which it is
> addressed.  This email may contain information that is privileged,
> confidential or otherwise protected from disclosure. Dissemination,
> distribution or copying of this e-mail or any attachments by anyone other
> than the intended recipient, or an employee or agent responsible for
> delivering the message to the intended recipient, is prohibited. If you are
> not the intended recipient of this message or the employee or agent
> responsible for delivery of this email to the intended recipient, please
> notify the sender by replying to this message and then delete it from your
> system.  Any use, dissemination, distribution, or reproduction of this
> message by unintended recipients is strictly prohibited and may be unlawful.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From steve at holdenweb.com  Mon Nov 13 04:54:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:54:50 -0600
Subject: Find interface associated with default route?
In-Reply-To: <ej77as$kjb$1@sea.gmane.org>
References: <ej6vr6$17a$1@sea.gmane.org>
	<ej705n$2n9$1@sea.gmane.org>	<ej72eg$7hr$1@sea.gmane.org>
	<ej77as$kjb$1@sea.gmane.org>
Message-ID: <ej9fb1$fv8$1@sea.gmane.org>

Neal Becker wrote:
[...]
> 
> A quick strace reveals that 'route' just reads /proc/net/route, so:
> 
C:\Steve>type /proc/net/route
The syntax of the command is incorrect.

C:\Steve>type \proc\net\route
The system cannot find the path specified.

Python, but not platform dependent :-)

It would be nice to provide a shim module to provide stuff like this in 
a way that any platofrm could use. But when you look at the trouble it 
took to find a reasonable way for Ka Ping's guid function to locate an 
Ethernet address you'll agree that it would be a lot of work.

So probably reading /proc/net/route is a good bet for a limited range of 
platforms. OpenBSD is another place you won't find /proc/net/route.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From gheorghe.postelnicu at gmail.com  Thu Nov 30 13:08:16 2006
From: gheorghe.postelnicu at gmail.com (Gheorghe Postelnicu)
Date: Thu, 30 Nov 2006 13:08:16 -0500
Subject: Automatic increment
Message-ID: <8094b1b60611301008n36969305p48bec2c8a0e10ec1@mail.gmail.com>

Hi,

I have a situation of the following type:

for line in lineList:
    for item in line.split()
        myArray[counter, itemCounter]
        itemCounter = itemCounter + 1
    counter = counter +1

Is there a way to get rid of the manual incrementation of the 2 counters?

Thanks,
-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School


From deets at nospam.web.de  Thu Nov 16 08:54:49 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Nov 2006 14:54:49 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
Message-ID: <4s38t9Ftln2aU1@mid.uni-berlin.de>

> 
> as posted before, linux kernel limit.
> 
> then you and your users can go as crazy as you want and you won't take
> out your system.
> 
> maybe you should think a little more before going on the attack like that.

You should maybe read a little bit more when making bold statements about
the feasibility of a sandboxed _PYTHON_. The OP wrote:

"""
I was thinking that maybe it could be possible to load and run untrusted
Python code, simply by loading it in a module with a modified version of
__builtins__. Without any reachable function that do unsafe operations,
code running from there shouldn't be able to do evil things.
"""

At least to me - and I presume pretty much everybody except you in this
thread - this means that he is interested in executing arbitrary pieces of
python code inside the interpreter, which comes from e.g. players who
customize their in-game behavior of their avatars. 

Now how exactly does linux (or any other resource limiting technique on any
OS) help here - killing the whole game server surely isn't a desirable
solution when one player goes berserk, might it be intentionally or not.

It is a recurring and pretty much understandable request on c.l.py to be
able to do so - sometimes it arises in the disguise of killable threads.
But unfortunately the solution doesn't seem to be as simple as one would
wish.

Diez


From free.condiments at gmail.com  Tue Nov 14 18:41:12 2006
From: free.condiments at gmail.com (Sam Pointon)
Date: 14 Nov 2006 15:41:12 -0800
Subject: multi split function taking delimiter list
In-Reply-To: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
Message-ID: <1163547672.843601.135430@k70g2000cwa.googlegroups.com>

On Nov 14, 7:56 pm, "martins... at gmail.com" <martins... at gmail.com>
wrote:
> Hi, I'm looking for something like:
>
> multi_split( 'a:=b+c' , [':=','+'] )
>
> returning:
> ['a', ':=', 'b', '+', 'c']
>
> whats the python way to achieve this, preferably without regexp?

pyparsing <http://pyparsing.wikispaces.com/> is quite a cool package
for doing this sort of thing. Using your example:

#untested
from pyparsing import *

splitat = Or(":=", "+")
lexeme = Word(alphas)
grammar = splitat | lexeme

grammar.parseString("a:=b+c")
#returns (the equivalent of)  ['a', ':=', 'b', '+', 'c'].

--Sam



From michele.simionato at gmail.com  Mon Nov 13 09:45:21 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 13 Nov 2006 06:45:21 -0800
Subject: article on Python 2.5 features
In-Reply-To: <1163380736.242639.181230@i42g2000cwa.googlegroups.com>
References: <1163380736.242639.181230@i42g2000cwa.googlegroups.com>
Message-ID: <1163429121.458075.144030@h48g2000cwc.googlegroups.com>

Beliavsky wrote:
> A Parade of New Features Debuts in Python 2.5
> by Gigi Sayfan
> "Python 2.5 still has the smell of fresh paint but it's the perfect
> time to drill down on the most important new features in this
> comprehensive release. Read on for detailed explanations and examples
> of exception handling, resource management, conditional expressions,
> and more."
>
> The full article is at
> http://www.devx.com/webdev/Article/33005/0/page/1 .

The article is nice overall, but I did not like the part about enhanced
generators. For instance, the sentence "The new interactive send()
empowers
generators to implement co-routines", could be debated. Also, it gives
you the false impression that you could not interact with Python 2.2
generators ("interact" in the sense of the article). IMO the important
bit about Python 2.5 generators is that you can send exceptions to
a generator, all the other features can be emulated even using revious
versions of Python.
For instance, here is an emulation of his tokenizer using Python 2.2
generators and a helper 'read_eval_yield_loop' class:

# morally turns a Python 2.2+ generator into a Python 2.5 generator
class read_eval_yield_loop(object):
    def __init__(self, gen, *args, **kw):
        self._arg = None
        self._it = gen(iter(lambda : self._arg, StopIteration), *args,
**kw)
    def __iter__(self):
        return self._it
    def send(self, arg):
        self._arg = arg
        return self._it.next()
    def next(self):
        return self.send(None)

# copied from the article with very minor changes
def tokenizer3(read, text, sep):
    try:
        while True:
            token = ''
            while text[0] == sep:
                text = text[1:]

            index = 0
            while text[index] != sep:
                token += text[index]
                index += 1
            yield token
            new_sep = read.next()
            if new_sep != None:
                sep = new_sep
            text = text[index:]
    except IndexError:
        if token != '':
            yield token

if __name__=='__main__':
    print '--- Smart Python 2.2+ tokenizer ---'
    g = read_eval_yield_loop(tokenizer3, text, ' ')
    for t in g:
        print t
        if t == 'comma':
            g.send(',')

                                          Michele Simionato



From theller at ctypes.org  Fri Nov 10 15:09:35 2006
From: theller at ctypes.org (Thomas Heller)
Date: Fri, 10 Nov 2006 21:09:35 +0100
Subject: announce: FAQs suggested
In-Reply-To: <1163170817.527911.85510@b28g2000cwb.googlegroups.com>
References: <1163166123.773324.126160@m7g2000cwm.googlegroups.com>	<ej20b4$rjj$02$1@news.t-online.com>	<1163167884.303515.257820@k70g2000cwa.googlegroups.com>	<mailman.2034.1163169174.11739.python-list@python.org>
	<1163170817.527911.85510@b28g2000cwb.googlegroups.com>
Message-ID: <4554DC7F.9040503@ctypes.org>

p.lavarre at ieee.org schrieb:
> Thanks again for making time to comment - insights into the perspective
> of the author are invaluable.  But if by chance you have time to
> continue:
> 
>> > > http://effbot.org/pyfaq/suggest.htm
>> > http://docs.python.org/dev/lib/ctypes-return-types.html
>> A note could probably be added to this section.
> 
> Good.  Next: Is there a place on the web where we can log that
> conclusion to inspire its resolution?

The canonical place is the Python bug tracker.  Best would be to suggest a sentence
or two for the docs.

Presonally, I would suggest to add something like this to the start of the docs, section 14.14.1.8:

"""
14.14.1.8 Return types

By default functions are assumed to return the C int type. Other return types can be specified by setting the restype attribute of the function object.

-> For functions that do not return anything, restype should be set to None.
"""

>> > void is missing from
>> > http://docs.python.org/dev/lib/node452.html "Fundamental data types"
>>
>> 'void' is not a type.
> 
> Help, lost me?

What I mean is that you cannot create 'variables' of type void in C, so I would
say it is not a type.  Do you think that ctypes should define
  c_void = None
somewhere?

I think that would really be confusing.  Consider:

>>> c_int(42)
c_int(42)
>>> c_void()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'NoneType' object is not callable
>>>

OTOH, void* is a type in C, also in ctypes, where it is spelled 'c_void_p'.

I hope this makes sense to you.

Thomas



From rrr at ronadam.com  Sat Nov 11 02:16:33 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 11 Nov 2006 01:16:33 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163209825.072410.203090@k70g2000cwa.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>
	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<mailman.2076.1163205410.11739.python-list@python.org>
	<1163209825.072410.203090@k70g2000cwa.googlegroups.com>
Message-ID: <ej3tji$nr1$2@sea.gmane.org>

Paul Boddie wrote:
> Ron Adam wrote:
>> PS.  Rather than shav of on character her and ther in pythons programing
>> languag, Lets remov all the silent leters from the english languag. That will
>> sav thousands mor kestroks over a few yers.
> 
> How about changing Python to support keywords and identifiers employing
> the Initial Teaching Alphabet?
> 
> http://en.wikipedia.org/wiki/Initial_Teaching_Alphabet
> 
> ;-)
> 
> Paul

Thanks for the link.  I haven't heard about ita before.  As one who constantly 
struggles with spelling, I wouldn't be adverse to such a change.  But of course 
that would not be the best way to promote python.

    Ron



From martin at v.loewis.de  Wed Nov 15 16:33:56 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 15 Nov 2006 22:33:56 +0100
Subject: Python-2.5.exe?
In-Reply-To: <455b824d$0$7054$c3e8da3@news.astraweb.com>
References: <v8H6h.15$895.11@newsfe04.lga>
	<mailman.198.1163608644.32031.python-list@python.org>
	<455b824d$0$7054$c3e8da3@news.astraweb.com>
Message-ID: <455b87c4$0$18471$9b622d9e@news.freenet.de>

John Salerno schrieb:
> Is it safe to assume that if you do this, Python first looks in
> C:\Python25 for the dll file, before trying to find the non-existent (on
> the USB drive) C:\Windows\System32?

python25.dll is found through mechanisms of the operating system, not
through code in Python. The operating system loads DLLs in the order
specified here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/dynamic-link_library_search_order.asp

As you can see, the directory containing the application is searched first.

Regards,
Martin


From kent at kentsjohnson.com  Tue Nov 14 15:19:18 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 14 Nov 2006 20:19:18 GMT
Subject: multi split function taking delimiter list
In-Reply-To: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
Message-ID: <axp6h.347$eb5.283@newsreading01.news.tds.net>

martinskou at gmail.com wrote:
> Hi, I'm looking for something like:
> 
> multi_split( 'a:=b+c' , [':=','+'] )
> 
> returning:
> ['a', ':=', 'b', '+', 'c']
> 
> whats the python way to achieve this, preferably without regexp?

What do you have against regexp? re.split() does exactly what you want:

In [1]: import re

In [2]: re.split(r'(:=|\+)', 'a:=b+c')
Out[2]: ['a', ':=', 'b', '+', 'c']

Kent


From ak at silmarill.org  Tue Nov 21 20:10:00 2006
From: ak at silmarill.org (Rainy)
Date: 21 Nov 2006 17:10:00 -0800
Subject: Vim scripts for editing Python?
In-Reply-To: <1164131336.302547.222060@k70g2000cwa.googlegroups.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
	<1164127733.241526.126200@m7g2000cwm.googlegroups.com>
	<1164131336.302547.222060@k70g2000cwa.googlegroups.com>
Message-ID: <1164157800.311165.122910@m7g2000cwm.googlegroups.com>


Danny Colligan wrote:
> On Nov 21, 11:48 am, "Danny Colligan" <dannycolli... at gmail.com> wrote:
> > Rainy wrote:
> > > Hi, did anyone make a good set of scripts for editing Python in Vim? I
> > > know there is one on vim.org but it isn't very advanced. thx..Here's what google has to say about it:http://www.google.com/search?hl=en&q=site%3Ahttp%3A%2F%2Fwww.vim.org%...http://www.google.com/search?hl=en&lr=&safe=off&q=site%3Ahttp%3A%2F%2...
> >
> > Danny
>
> Almost forgot... if you do some searching around on comp.editors for
> vim and python:
>
> http://groups-beta.google.com/group/comp.editors/search?group=comp.editors&q=vim+python&qt_g=Search+this+group
>
> You'll find some helpful threads such as this one:
>
> http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/7678e4269a806476/c65a6a9ed84e0eb2?lnk=gst&q=python&rnum=5#c65a6a9ed84e0eb2
> 
> Danny

Thanks Danny, that's exactly what I was looking for!



From gandalf at designaproduct.biz  Fri Nov 10 13:59:39 2006
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Fri, 10 Nov 2006 19:59:39 +0100
Subject: Getting externally-facing IP address?
In-Reply-To: <1163175255.5053.124.camel@pepper>
References: <1163175255.5053.124.camel@pepper>
Message-ID: <4554CC1B.9070108@designaproduct.biz>

Michael B. Trausch wrote:
> Hello,
>
> Every programming example that I have seen thus far shows simple 
> server code and how to bind to a socket--however, every example binds 
> to the localhost address.  What I am wondering is this:  Is there a 
> clean way to get the networked IP address of the machine the code is 
> running on?  For example, my laptop's IP address is 192.168.0.101, and 
> I want to bind a server to that address.  Is there a clean way of 
> doing so that will work, for example, when I move the code to my 
> server (which obviously doesn't have the same IP address)?
Another way would be this:

1. connect to a server using a TCP socket (for example, google.com or 
anything else that goes through your desired interface)
2. after connection, read the IP address (client address) from the 
socket object

IMHO if you wish to operate a server, you should either bind to all IP 
addresses, or know your "real" IP address.

   Laszlo



From bdesth.quelquechose at free.quelquepart.fr  Mon Nov 20 16:59:11 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Nov 2006 22:59:11 +0100
Subject: basic python questions
In-Reply-To: <1163998289.608597.115010@h48g2000cwc.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
	<4560dc49$0$10440$426a74cc@news.free.fr>
	<1163998289.608597.115010@h48g2000cwc.googlegroups.com>
Message-ID: <4562201a$0$26264$426a74cc@news.free.fr>

Paddy a ?crit :
> Bruno Desthuilliers wrote:
> 
>>And this would be still more informative (and not deprecated...):
>>
>>filename = '/tmp/foo'
>>f = open(fliename)
>>
>>Catching an exception just to raise a less informative one is somewhat
>>useless IMHO.
> 
> 
> Except that in the 'artificial' environment of homework, you are marked
> for what you *show* you know, Catching an exception shows that the
> pupil considered that opening a file could throw an exception.

Surely - but then he should also show that he knows what to do with it 
(ie sys.exit with a friendlier error message). Bad exception handling is 
worse than no exception handling (MHO based on experience).

> You would have to comment  that a try except block was considered, give
> an example of correct usage, then why it was not used, to get
> equivalent, (or slightly higher), marks.

This should certainly get a *far* better marks than a broken exception 
handling...

FWIW, the real problem here is with the xref function being responsible 
for file access. It should of course take a filelike object and let the 
caller deal with opening/closing the file - and handling possible 
exceptions in a way that's appropriate.


From cliff at develix.com  Wed Nov  8 14:42:21 2006
From: cliff at develix.com (Cliff Wells)
Date: Wed, 08 Nov 2006 11:42:21 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1163011320.632781.53370@m7g2000cwm.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
Message-ID: <1163014941.3371.55.camel@localhost.localdomain>

On Wed, 2006-11-08 at 10:42 -0800, Paddy wrote:

> I too know your wrong Aahz. The written word is not the same as that
> spoken. People should make an effort to put across their meaning in a
> clear manner. If I were going to an interview I would be very careful
> about swearing and most likely not do it. People complain about the
> friendliness and tone of groups, and mention it when talking about
> programming languages.

But of course, this was never about "friendliness or tone".  The person
who uttered the dreaded word was actually speaking quite positively
about Pyro.  The complaint was about the use of a particular word, not
the intent of it.

> Not everyone swears like Eddy Murphy in Beverley Hills Cop, and a lot
> of those that do, would not do so when they want to impress, or
> communicate with a stranger.

But of course "not everyone" is a double-edged sword that can just as
easily be turned against either party.  If we limit ourselves to saying
what is going to be the most palatable for the widest audience we will
most likely find ourselves confined to discussing the weather. 

And of course, people who worry too much about impressing others rarely
do.  Just ask DHH of Ruby on Rails fame:

http://static.flickr.com/47/127984254_ddd4363d6a_m.jpg

Personally I find people trying to impose their personal beliefs on
others to be at least as offensive as any particular swear word and
about a million times as dangerous.  

> P.S. I did a google search and found 540,000 hits for python in c.l.p.
> and only 121 for f***. thats less than one in a thousand. Lets keep it
> that way please.

Well, I think that's a good point: the one instance we had that spawned
this thread fell well within this "one-in-a-thousand" boundary.  So
there was no indication that c.l.py was in danger of turning into a
sailor's bar.  

I'll apply an old software maxim (from sendmail?) to the topic of public
interaction: "Be liberal in what you accept, conservative in what you
send."  Applying this would suggest that both parties were equally at
fault in this situation, so perhaps we can just leave it at that.  

Regards,
Cliff




From john106henry at hotmail.com  Fri Nov 10 01:59:48 2006
From: john106henry at hotmail.com (John Henry)
Date: 9 Nov 2006 22:59:48 -0800
Subject: how is python not the same as java?
In-Reply-To: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
Message-ID: <1163141988.460447.9120@m73g2000cwd.googlegroups.com>


gavino wrote:
> both are interpreted oo langauges......


I remember the days when I got all excited about Java (many many moons
ago when Java first came out).  I brought a whole truckload of books on
it, even spent 5 days attending a seminar on the subject.   To my great
disappointment, I never got very far with it.   Not being a
"professional programmer" by training, I found it very difficult to go
very far with Java.   Everything was so "un-natural" for me.  So, I
felt back to my little C-corner.

Last year, I got a chance to attend a 5 day class on Python.   Hated it
- for the first 5 minutes (what the ****, they are using white space
for what????)  but from that pont on, never look back.

Not considering myself an advance Python programmer.   Don't matter, I
am very proficient with it.   It allows me to get things done - in a
whole lot less time then I have to do otherwise.

Learning new things about it everyday, finding new and usefull open
source packages for it everyday.

My Java books?  They hit the trash dump long ago....



From deets at nospam.web.de  Fri Nov 24 08:56:17 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Nov 2006 14:56:17 +0100
Subject: NFS server
References: <1164373253.607159.26260@j44g2000cwa.googlegroups.com>
Message-ID: <4soc01F100bi2U1@mid.uni-berlin.de>

srj wrote:

> i wish to develop an NFS server usin python from scratch( some wise guy
> told me i'ts easy!).
> can i get any kinda tutorial for this??
> 
> any suggestions on how 2 begin?

Ask the wise guy. All others install an NFS server.

Diez


From gagsl-py at yahoo.com.ar  Thu Nov 30 01:32:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 30 Nov 2006 03:32:42 -0300
Subject: Python Question About Compiling.
In-Reply-To: <5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.co
 m>
References: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
	<5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061130033226.01fe7b98@yahoo.com.ar>

At Thursday 30/11/2006 02:02, Scheol Service wrote:

>Im just unsure on how to compile python code into .exe executionable
>files.  Is there a simple way to do this?

py2exe


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From kosh at aesaeion.com  Wed Nov  8 00:55:54 2006
From: kosh at aesaeion.com (William Heymann)
Date: Tue, 7 Nov 2006 22:55:54 -0700
Subject: Python memory usage
In-Reply-To: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
Message-ID: <200611072255.54816.kosh@aesaeion.com>

On Tuesday 07 November 2006 22:42, placid wrote:
> Hi All,
>
> Just wondering when i run the following code;
>
> for i in range(1000000):
>      print i
>
> the memory usage of Python spikes and when the range(..) block finishes
> execution the memory usage does not drop down. Is there a way of
> freeing this memory that range(..) allocated?
>
> I found this document but the fix seems too complicated.
>
> http://www.python.org/pycon/2005/papers/79/python-memory.pdf
>
> Cheers

Change range to xrange. It will run faster and use up almost no memory by 
comparison. I know the point you are getting at for releasing memory however 
in this case there is no reason to allocate the memory to begin with.

Stranegly enough on my python2.4 install (kubuntu edgy) about half the memory 
gets released as soon as the call finishes however if I run the same call 
again it only goes up to the memory usage it was before the memory was 
released. So some of the memory is returned and some is reused by python 
later.


From zondo42 at googlemail.com  Thu Nov  2 03:09:00 2006
From: zondo42 at googlemail.com (Glenn Hutchings)
Date: 2 Nov 2006 00:09:00 -0800
Subject: Python tools for managing static websites?
In-Reply-To: <mailman.1638.1162446948.11739.python-list@python.org>
References: <mailman.1542.1162296580.11739.python-list@python.org>
	<1162331694.836988.322220@m73g2000cwd.googlegroups.com>
	<mailman.1638.1162446948.11739.python-list@python.org>
Message-ID: <1162454940.754955.272160@h48g2000cwc.googlegroups.com>

I haven't seen mention of HTMLgen, another python package.  Check it
out at:

    http://starship.python.net/crew/friedrich/HTMLgen/html/main.html

Glenn



From pavlovevidence at gmail.com  Fri Nov  3 21:02:37 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 3 Nov 2006 18:02:37 -0800
Subject: Timing a function object versus timeit
In-Reply-To: <pan.2006.11.04.01.44.21.971767@REMOVE.THIS.cybersource.com.au>
References: <pan.2006.11.04.01.44.21.971767@REMOVE.THIS.cybersource.com.au>
Message-ID: <1162605757.774426.230750@f16g2000cwb.googlegroups.com>


Steven D'Aprano wrote:
> The timeit module is ideal for measuring small code snippets; I want to
> measure large function objects.
>
> Because the timeit module takes the code snippet argument as a string, it
> is quite handy to use from the command line, but it is less convenient for
> timing large pieces of code or when working in the interactive
> interpreter. E.g. variations on this *don't* work:
[snip]
> Do others have other suggestions or techniques they use?


Python 2.4.3 (#2, Jun 19 2006, 12:51:44)
[GCC 4.0.3 20060212 (prerelease) (Debian 4.0.2-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> def foo(x):
...     return x+1
...
>>> import timeit
>>> timeit.Timer("foo(1)","from __main__ import foo")
1.1497418880462646


Carl Banks



From fredrik at pythonware.com  Mon Nov 13 05:04:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 11:04:21 +0100
Subject: reduce to be removed?
In-Reply-To: <ej9ekk$e23$1@sea.gmane.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<1163314554.972785.175860@h48g2000cwc.googlegroups.com>
	<ej9ekk$e23$1@sea.gmane.org>
Message-ID: <ej9fv3$i3l$2@sea.gmane.org>

Steve Holden wrote:

> In actual fact when Alex Martelli introduced sum() he intended it to be 
> polymorphic over all the container types including strings. The check to 
> exclude the string case was added when it was determined that it was 
> terribly inefficient to concatenate strings that way. the same may well 
> apply to other sequences.

an important difference is that if you repeatedly copy a string object, 
you'll actually copy *all* data in the string over and over again.  when 
you copy a list, you only copy references to the objects in the list. 
the size of the data *in* the list doesn't matter.

> I suppose it's only a matter of time before someone wants to define 
> dict.__add__ ...

that's been proposed quite a few times, and always gets stuck when it's 
time to define the exact semantics for dealing with collisions.  there 
are simply too many ways to do it, and all of them are can be trivially 
and efficiently implemented in terms of copy/update or for-in (or, in 
quite a few cases, by using sets instead of dicts).

</F>



From kraus at hagen-partner.de  Thu Nov  9 04:55:45 2006
From: kraus at hagen-partner.de (Wolfram Kraus)
Date: Thu, 09 Nov 2006 10:55:45 +0100
Subject: Sorted list - how to change it
In-Reply-To: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
References: <1163065969.593970.165600@b28g2000cwb.googlegroups.com>
Message-ID: <eiutv1$jvh$1@ork-un.noris.net>

On 09.11.2006 10:52, Lad wrote:
> I have a sorted list for example [1,2,3,4,5] and I would like to change
> it in a random way
> e.g [2,5,3,1,4] or [3,4,1,5,2]  or in any other way except being
> ordered.
> What is the best/easiest
>  way how to do it?
> 
> Thank you for help
> L.
> 
use random.shuffel:

>>> import random
>>> x = [1,2,3,4,5]
>>> random.shuffle(x)
>>> x
[1, 4, 2, 3, 5]
>>> random.shuffle(x)
>>> x
[4, 2, 1, 3, 5]

see: http://docs.python.org/lib/module-random.html

HTH,
Wolfram


From fredrik at pythonware.com  Mon Nov  6 10:51:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 06 Nov 2006 16:51:22 +0100
Subject: string to list of numbers conversion
In-Reply-To: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
References: <1162730071.953080.284980@i42g2000cwa.googlegroups.com>
Message-ID: <einllp$25u$2@sea.gmane.org>

jm.suresh at no.spam.gmail.com wrote:

>   I have a string '((1,2), (3,4))' and I want to convert this into a
> python tuple of numbers. But I do not want to use eval() because I do
> not want to execute any code in that string and limit it to list of
> numbers.

here's yet another approach:

http://online.effbot.org/2005_11_01_archive.htm#simple-parser-1

also see:

http://online.effbot.org/2005_11_01_archive.htm#simple-parser-3

</F>



From georgeryoung at gmail.com  Tue Nov 21 07:56:08 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 21 Nov 2006 04:56:08 -0800
Subject: Software Compatable with other versions?
In-Reply-To: <mailman.534.1164111713.32031.python-list@python.org>
References: <mailman.534.1164111713.32031.python-list@python.org>
Message-ID: <1164113768.450227.161750@m73g2000cwd.googlegroups.com>

On Nov 21, 7:24 am, "Michael Yanowitz" <m.yanow... at kearfott.com> wrote:
>   I am still using Python 2.4.3, I haven't upgraded yet.
> However, I would like to know if my 2.4.3 programs will run
> in 2.5 without modification.
>   Is there any way to test that my software is compatable
> with 2.5 (or any other version), without actually installing
> that version?:
You need to install 2.5.  If you're on linux or similar OS, get the
source and
do
  ./configure
  make altinstall
This installs almost everything, but does not overwrite your link to
2.4.3.

Then you can test your code using
   python2.5 myfile.py

When you're all set, just change the link "python" to point to the new
python2.5.

>   I have been told that the .pyc are not compatable. Is it
> possible, to convert a 2.4.x .pyc to a 2.5 .pyc?

Very unlikely.
 -- George Young

> Thanks in advance:
> Michael Yanowitz



From ptmcg at austin.rr._bogus_.com  Sun Nov 19 04:13:40 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 09:13:40 GMT
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com><18C7h.72$_H5.25@tornado.texas.rr.com><1163862527.042015.63400@k70g2000cwa.googlegroups.com>
	<mailman.453.1163921912.32031.python-list@python.org>
Message-ID: <8fV7h.324$_H5.262@tornado.texas.rr.com>

"Hendrik van Rooyen" <mail at microcorp.co.za> wrote in message 
news:mailman.453.1163921912.32031.python-list at python.org...
> <nateastle at gmail.com> wrote:
>
>
>> I am currently going to school at Utah Valley State College, the course
>> that I am taking is analysis of programming languages. It's an upper
>> division course but our teacher wanted to teach us python as part of
>
> what does "upper division" mean in this context ?  I am unfamiliar with 
> the
> term.
>
> - Hendrik
>
In a 4-year college program in the US, an upper division course is an 
advanced course, usually reserved for those in the 3rd or 4th years.

-- Paul 




From auch-ich-m at g-kein-spam.com  Sun Nov 19 19:33:18 2006
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Mon, 20 Nov 2006 01:33:18 +0100
Subject: re.match -- not greedy?
References: <mailman.476.1163979600.32031.python-list@python.org>
	<1163981503.295521.7180@m7g2000cwm.googlegroups.com>
Message-ID: <4416764.HWmjve4xA3@news.perlig.de>

* Carl Banks wrote:

> I'm suddenly curious if there are any cases at all where
> greediness changes whether it finds a match.

nope, per definitionem ;-)

greedy := longest leftmost match

nd
-- 
die (eval q-qq[Just Another Perl Hacker
]
;-)
# Andr? Malo, <http://www.perlig.de/> #


From belred at gmail.com  Wed Nov 29 14:52:04 2006
From: belred at gmail.com (Bryan)
Date: Wed, 29 Nov 2006 11:52:04 -0800
Subject: buildbot
Message-ID: <ekko9a$phs$1@sea.gmane.org>

does anyone know if processes defined around buildbot would be similar to
the one used by the mozilla seamonkey project which uses tinderbox?  this
link shows an example of an entire checkin cycle using tinderbox and it's
quite detailed and gives a very good picture of what using the product
would be like.

http://www.mozilla.org/hacking/working-with-seamonkey.html

i know python is currently using buildbot...  are there any differences or
simplifications in the processes using buildbot?

thanks,

bryan





From johnjsal at gmail.com  Thu Nov  2 16:08:22 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 13:08:22 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <1162500604.198685.97710@i42g2000cwa.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>
Message-ID: <1162501702.150119.313860@f16g2000cwb.googlegroups.com>

JohnJSal wrote:
> Peter Otten wrote:
>
>
> > ...the above is not a 1-tuple, but an ordinary string. You forgot the
> > trailing comma:
> >
> > ('notes',)
>
> Right you are! Now it works! :)
>
> Thanks!

Oh great, now I've moved on to another issue. It seems that the list
appending isn't working right. All that gets added to a list is the
last value, not everything. Am I doing something wrong with the append
method?



From no-spam at no-spam-no-spam.com  Wed Nov  1 08:14:51 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Wed, 01 Nov 2006 14:14:51 +0100
Subject: import in threads: crashes & strange exceptions on dual core
	machines
In-Reply-To: <mailman.1576.1162343466.11739.python-list@python.org>
References: <ei4vtc$220$1@news.albasani.net>	<1162264611.252985.208010@m7g2000cwm.googlegroups.com>	<ei7al7$9ik$1@news.albasani.net>	<1162337365.070683.156670@h48g2000cwc.googlegroups.com>
	<mailman.1576.1162343466.11739.python-list@python.org>
Message-ID: <eia6kb$7t0$1@news.albasani.net>

Steve Holden wrote:
> Klaas wrote:
>> robert wrote:
>>
>>> Klaas wrote:
>>>
>>>> It seems clear that the import lock does not include fully-executing
>>>> the module contents.  To fix this, just import cookielib before the
>>>
>>> What is the exact meaning of "not include fully-executing" - 
>>> regarding the examples "import cookielib" ?
>>> Do you really mean the import statement can return without having 
>>> executed the cookielib module code fully?
>>> (As said, a simple deadlock is not at all my problem)
>>
>>
>> No, I mean that the import lock seems to not be held while the module
>> contents are being executed (which would be why you are getting
>> partially-initialized module in sys.modules).  Perhaps it _is_ held,
>> but released at various points of the import process.  Someone more
>> knowledgable of python internals will have to answer the question of
>> what _should_ be occurring.
>>
> ... and who better than Tim Peters?
> 
>   http://mail.python.org/pipermail/python-list/2004-December/254497.html
> 

this describes also a dead lock condition, when (thread starting) main-loop code is executed already during import and not via a "module.start_loop()" scheme.

Here the situation is reverse: imports are done in threads. That should go well.

The problem seem to be module namespace corruption (partial execution?) and worse OS-level crashes. I'm using zip files on the sys.path.
(
Inspected also the Py2.3.5 zipimport scheme for that, but no indication of flaws so far.  The lock is done very early in PyImport_ImportModuleEx. Just if there would be multiple Interpreters (Py_NewInterpreter) - which I don't use - the "static void lock_import(void)" would possibly be weak. )


I made a isolated thread race test with dozens of such OP code like patterns (reloads enforced) executing in parallel and found no problem.
I've spread locks and main thread (global) imports now in my app code, but it takes time until I get success significant feedback. As I have no explanation to the point .. a low percentage task :-)

win32ui/win32api (the only extension libs) are still on my radar for general ref-count/memleak problems (I found a few in the past), but that leads to abyss. I thought that the pattern of the crashes (crash early after app start; strange exceptions frequently around cookielib / re.compile) points to something else in Python itself ...


-robert


From Sebastien.Boisgerault at gmail.com  Fri Nov 24 16:10:11 2006
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 24 Nov 2006 13:10:11 -0800
Subject: Pydev configuration
In-Reply-To: <456757c2$0$7958$426a74cc@news.free.fr>
References: <1164389878.833569.60710@l39g2000cwd.googlegroups.com>
	<456757c2$0$7958$426a74cc@news.free.fr>
Message-ID: <1164402611.792702.299990@45g2000cws.googlegroups.com>



On Nov 24, 9:42 pm, tool69 <k... at free.fr> wrote:
> S?bastien Boisg?rault a ?crit :> Hi,
>
> > Did anyone managed to change the code font family/size
> > in Pydev (Python Editor Plugin for Eclipse) ? I found how
> > to change the color mapping (Windows/Preference/Pydev)
> > but did not found the font setting.
>
> > Cheers,
>
> > SBSalut S?bastien,
>
> Preferences/General/Appearence/Colors&Fonts/ in the right menu choose
> Basic/Text Font

Ahhhhh ... Thanks a lot ! I had tweaked in the neighbourhood of this
option
but it was unclear for me that "Text Font" did also refer to Python
code.

'Bitsream Vera Sans Mono', here I come ;)

Cheers

SB

> 6TooL9



From hg at nospam.com  Wed Nov 22 14:05:38 2006
From: hg at nospam.com (hg)
Date: Wed, 22 Nov 2006 13:05:38 -0600
Subject: utf - string translation
In-Reply-To: <Xns9883C1C005EDFduncanbooth@127.0.0.1>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
Message-ID: <mf19h.1992$%_2.1833@newsfe19.lga>

Duncan Booth wrote:
> hg <hg at nospam.com> wrote:
> 
>>> or in other words, put this at the top of your file (where "utf-8" is
>>> whatever your editor/system is using):
>>>
>>>    # -*- coding: utf-8 -*-
>>>
>>> and use
>>>
>>>    u'<text>'
>>>
>>> for all non-ASCII literals.
>>>
>>> </F>
>>>
>> Hi,
>>
>> The problem is that:
>>
>> # -*- coding: utf-8 -*-
>> import string
>> print len('a')
>> print len('?')
>>
>> returns 1 then 2
> 
> And if you do what was suggested and write:
> 
> # -*- coding: utf-8 -*-
> import string
> print len(u'a')
> print len(u'?')
> 
> then you get:
> 
> 1
> 1
OK,

How would you handle the string.maketrans then ?

hg





From rrr at ronadam.com  Mon Nov 13 16:10:06 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 13 Nov 2006 15:10:06 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558D443.1030802@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>
	<4558D443.1030802@hobbshouse.org>
Message-ID: <ejan6h$e28$1@sea.gmane.org>

Michael Hobbs wrote:
> Ron Adam wrote:
>> Michael Hobbs wrote:
>>   
>>> Ron Adam wrote:
>>>     
>>>> LOL,  of course it would.  I would expect that too after a suitable amount of 
>>>> 'brain washing', oops, I mean training and conditioning. ;-)
>>>>   
>>>>       
>>> Trust me, my brain is quite filthy and doesn't wash easily. I do 
>>> appreciate aesthetics, which is why still stay with Python, even after 
>>> programming in Ruby for several months. I've used Java/C/C++ for years, 
>>> yet I make no complaint about the lack of static typing in Python. Even 
>>> so, I'd like to think that I know a good thing when I see it.
>>>     
>> I find if I approach things on a learning basis and always presume there are 
>> things I still don't know.  I then tend to get much more help and support than 
>> if I approach things on a 'I'm right/your wrong' basis.  Also, if I do turn out 
>> to have a point a view that is not exactly right, it is then much easier for me 
>> to take a new position or even the reverse position and move on.
>>
>>   
> To clarify my position, I'm not intentionally being contradictory. In 
> fact, when I first posed my question, I asked if anyone had a good 
> reason for why the redundancy should continue to exist. Expecting to get 
> a nice grammatical counter-example, the only viable answer that anyone 
> could come up with is the FAQ answer that it improves readability. Since 
> then, I've been fighting my point that the colon really doesn't improve 
> readability all that much.

And you may be entirely correct that it doesn't improve readability "that much" 
or not enough to matter. So at some point some body made a choice and now that's 
what we have.

But the situation of readability now is influenced by that choice made then. If 
it was a close call when abc was designed, enough so that a study was needed to 
decide, It has now become what we are used to.  And familiarity probably has a 
bigger effect on readability.


> In the end, I have to admit that I really couldn't give a flying frog if 
> the colon is there or not. It's just a colon, after all. I *was* hoping 
> that I could convince someone to honestly think about it and consider if 
> the colon is really that noticeable. But so far, the only response that 
> I've received is that there's that ABC study somewhere and that settles 
> that.
> 
> - Mike

As I said above, it may in fact be the way it is, simply because someone at some 
point made a choice for what ever reason they had at the time.  But changing 
this particular item at this time isn't something that would be practical. (my 
opinion) So probably the best you can expect is for a few people to agree with 
you. Which is fine.

If enough people were to agree with you, you could start a group effort to write 
your own version of python and distribute that.  There's nothing preventing 
anyone from doing that.

Cheers,
    Ron




From Leo.Kislov at gmail.com  Sun Nov 19 17:54:33 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 19 Nov 2006 14:54:33 -0800
Subject: A python IDE for teaching that supports cyrillic i/o
References: <mailman.430.1163877551.32031.python-list@python.org>
	<1163935652.536330.240090@b28g2000cwb.googlegroups.com>
	<mailman.460.1163945882.32031.python-list@python.org>
Message-ID: <1163976873.100140.172880@j44g2000cwa.googlegroups.com>


Kirill Simonov wrote:
> On Sun, Nov 19, 2006 at 03:27:32AM -0800, Leo Kislov wrote:
> > IDLE on Windows works fine for your example in interactive console:
> >
> > >>> name = raw_input("What's your name? ")
>
> Have you tried to use cyrillic characters in a Python string in
> interactive console? When I do it, I get the "Unsupported characters in
> input" error. For instance,
>
> >>> print "??????"  # That's "Hi" in Russian.
> Unsupported characters in input

That works for me in Win XP English, with Russian locale and Russian
language for non-unicode programs. Didn't you say you want to avoid
unicode? If so, you need to set proper locale and language for
non-unicode programs.

>
> > And another question: are you aware of the fact that recommended way to
> > handle non-ascii characters is to use unicode type? Most of IDEs should
> > work fine with unicode.
>
> Usually using unicode type gives you much more headache than benefits
> unless you are careful enough to never mix unicode and str objects.

For a professional programmer life is full of headaches like this :)
For high school students it could be troublesome and annoying, I agree.


> Anyway, I just want the interactive console of an IDE to behave like a
> real Python console under a UTF-8 terminal (with sys.stdout.encoding ==
> 'utf-8').

Do you realize that utf-8 locale makes len() function and slicing of
byte strings look strange for high school students?

hi = u"??????".encode("utf-8")
r = u"?".encode("utf-8")
print len(hi)        # prints 12
print hi[1] == r   # prints False
for char in hi:
    print char      # prints garbage

As I see you have several options:
1. Set Russian locale and Russian language for non-unicode programs on
Windows.
2. Introduce students to unicode.
3. Wait for python 3.0
4. Hack some IDE to make unicode friendly environment like unicode
literals by default, type("??????") == unicode, unicode
stdin/stdout, open() uses utf-8 encoding by default for text files,
etc...

   -- Leo



From gagsl-py at yahoo.com.ar  Wed Nov 29 20:07:22 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 22:07:22 -0300
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164843339.129776.110420@j72g2000cwa.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e08ba$0$1505$db0fefd9@news.zen.co.uk>
	<1164843339.129776.110420@j72g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061129220128.04535540@yahoo.com.ar>

At Wednesday 29/11/2006 20:35, Steve Bergman wrote:

>BTW, strictly speaking, shouldn't I be adding something to the floating
>point sqrt result, before converting to int, to allow for rounding
>error?  If it is supposed to be 367 but comes in at 366.99999999, don't
>I potentially classify a composite as a prime?

You could avoid sqrt using divmod (which gets the % result too); stop 
when quotient<=divisor.
But this approach creates a tuple and then unpacks it, so you should 
time it to see if there is an actual speed improvement.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From bugracakir at gmail.com  Fri Nov 17 09:49:30 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Fri, 17 Nov 2006 16:49:30 +0200
Subject: Python list Limit
Message-ID: <5a00f6240611170649v275f5e91ka97e997357948513@mail.gmail.com>

Hi,

What is the size limit of list data type in Python ?
I've found an MemoryError while extending a list with

samplelist.extend("tail")

Thanks !!!
-------------- next part --------------
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From sturlamolden at yahoo.no  Thu Nov 16 10:42:20 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 16 Nov 2006 07:42:20 -0800
Subject: numpy/scipy: error of correlation coefficient (clumpy data)
In-Reply-To: <ejhaak$g97$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
	<ejf6a7$fno$1@news.albasani.net>
	<1163640918.373134.285490@m7g2000cwm.googlegroups.com>
	<ejhaak$g97$1@news.albasani.net>
Message-ID: <1163691740.158339.135610@m73g2000cwd.googlegroups.com>


robert wrote:

> Think of such example: A drunken (x,y) 2D walker is supposed to walk along a diagonal, but he makes frequent and unpredictable pauses/slow motion. You get x,y coordinates in 1 per second. His speed and time pattern at all do not matter - you just want to know how well he keeps his track.


In which case you have time series data, i.e. regular samples from p(t)
= [ x(t), y(t) ]. Time series have some sort of autocorrelation in the
samples as well, which must be taken into account. Even tough you could
weight each point by the drunkard's speed, a correlation or linear
regression would still not make any sense here, as such analyses are
based on the assumption of no autocorrelation in the samples or the
residuals. Correlation has no meaning if y[t] is correlated with
y[t+1], and regression has no meaning if the residual e[t] is
correlated with the residual e[t+1].

A state space model could e.g. be applicable. You could estimate the
path of the drunkard using a Kalman filter to compute a Taylor series
expansion p(t) = p0 + v*t + 0.5*a*t**2 + ... for the path at each step
p(t). When you have estimates for the state parameters s, v, and a, you
can compute some sort of measure for the drunkard's deviation from his
ideal path.

However, if you don't have time series data, you should not treat your
data as such.

If you don't know how your data is generated, there is no way to deal
with them correctly. If the samples are time series they must be
threated as such, if they are not they should not. If the samples are
i.i.d. each point count equally much, if they are not they do not. If
you have a clumped data due to time series or lack of i.i.d., you must
deal with that. However, data can be i.i.d. and clumped, if the
underlying distribution is clumped. In order to determine the cause,
you must consider how your data are generated and how your data are
sampled. You need meta-information about your data to determine this.
Matlab or Octave will help you with this, and it is certainly not a
weakness of NumPy as you implied in your original post. There is no way
to put magic into any numerical computation. Statistics always require
formulation of specific assumptions about the data. If you cannot think
clearly about your data, then that is the problem you must solve.



From orsenthil at gmail.com  Mon Nov 13 13:18:57 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 10:18:57 -0800
Subject: httplib.InvalidURL: nonnumeric port: For
	charactersintheproxypassword in URL
In-Reply-To: <mailman.68.1163432554.32031.python-list@python.org>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<1163431557.397172.175850@f16g2000cwb.googlegroups.com>
	<mailman.68.1163432554.32031.python-list@python.org>
Message-ID: <1163441937.435176.246380@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> "Phoe6" wrote:
>
> > proxy_password = urllib.quote(proxy_password_orig)
>
> make that:
>
>     proxy_password = urllib.quote(proxy_password_orig, "")
>

Oh yeah. Wonderful!!
That worked. Thanks a lot Fredrik!. :-)  (<^> prostrations)

Am sorry for the trouble and my mistake in not getting it properly the
first time. :(

Regards,
Senthil



From onurb at xiludom.gro  Tue Nov 21 06:16:38 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 21 Nov 2006 12:16:38 +0100
Subject: OODB vs RDBMS
In-Reply-To: <1164065670.573361.60390@m73g2000cwd.googlegroups.com>
References: <4se3omFv6reaU1@mid.individual.net>
	<45621a57$0$10443$426a74cc@news.free.fr>
	<mailman.519.1164064611.32031.python-list@python.org>
	<1164065670.573361.60390@m73g2000cwd.googlegroups.com>
Message-ID: <4562e017$0$5409$426a74cc@news.free.fr>

Dan Lenski wrote:
> I'll second the recommendation of sqlalchemy... I've heard it's very
> good.  Personally I prefer SQLObject, which is a similar library but in
> my opinion a bit simpler and more "pythonic".

SQLObject and SQLAlchemy have different purposes IMHO : the first one is
meant as a way to easily persist objects in a SQL DBMS, while the second
is primarily a (mostly successful) attempt to provide a higher-level,
pythonic interface to SQL DBMS - the ORM features of SQLAlchemy being
mostly built on top of the SQL/Python integration layer.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jscrerar at compuserve.com  Fri Nov 24 09:12:27 2006
From: jscrerar at compuserve.com (Jim)
Date: 24 Nov 2006 06:12:27 -0800
Subject: How do I access a main frunction from an import module?
Message-ID: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>

Hi,

I have created an import module.  And would like to access a function
from the main script, e.g.,

file abc.py:
###################
def a():
    m()
    return None
####################

file main.py:
#####################
from abc import *
def m():
    print 'something'
    return None

a()
######################

python25.exe main.py

Thanks,
Jim



From cvanarsdall at mvista.com  Mon Nov  6 20:24:17 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Mon, 06 Nov 2006 17:24:17 -0800
Subject: Pyro stability
In-Reply-To: <454fdbc5$0$335$e4fe514c@news.xs4all.nl>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<454dd84b$0$328$e4fe514c@news.xs4all.nl>	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
Message-ID: <454FE041.9050904@mvista.com>

Irmen de Jong wrote:
> writeson wrote:
>   
>> Irmen,
>>
>> Thanks, you're very good about answering Pyro related questions!
>>     
>
> Well, I do have an advantage here, being Pyro's author.
>   
And I don't know if you get this enough... but thanks.  Pyro is fucking 
amazing and has been a great help to a couple of our projects.

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From bdesth.quelquechose at free.quelquepart.fr  Mon Nov 20 16:38:53 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Nov 2006 22:38:53 +0100
Subject: An error installing MoinWiki
In-Reply-To: <1164003856.545942.169750@k70g2000cwa.googlegroups.com>
References: <1164003856.545942.169750@k70g2000cwa.googlegroups.com>
Message-ID: <45621b58$0$10443$426a74cc@news.free.fr>

Jia Lu a ?crit :
> Hi all
>  I tried to install moinmoinWiki. But after installing with the guide,
> I got the error when I access the test page
> "http://localhost/moinWiki?action=test".
> ...
> ...
> testBasicPackageThings
> (MoinMoin._tests.test_packages.UnsafePackageTestcase) ... ERROR
> ...
> ...
> ======================================================================
> ERROR: testBasicPackageThings
> (MoinMoin._tests.test_packages.UnsafePackageTestcase)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File
> "/usr/lib/python2.4/site-packages/MoinMoin/_tests/test_packages.py",
> line 54, in setUp
>     raise TestSkipped('This test needs to be run using the test wiki.')
> TestSkipped: This test needs to be run using the test wiki.
> 
> ----------------------------------------------------------------------
> 
> Does anyone know how to solve it ?

Looks like running the test using the test wiki might be a good start.
But why don't you ask on MoinMoin mailing-list ? And while you're at it,
read this too:
http://catb.org/esr/faqs/smart-questions.html#forum

HTH


From mike$#at^&nospam!%trauschus  Fri Nov  3 10:14:53 2006
From: mike$#at^&nospam!%trauschus (Michael B. Trausch)
Date: Fri, 03 Nov 2006 10:14:53 -0500
Subject: Converting Microsoft Works databases.... *shudder*
Message-ID: <upednTjcPOxtwdbYnZ2dnUVZ_sydnZ2d@comcast.com>

I was wondering if anyone has had any experience with this.  Someone I
know is trying to move away from Microsoft Works, and I am trying to
look into a solution that would convert their data in a lossless fashion
to a more modern format.  The database has more than 65K rows, so
converting it to be an Excel spreadsheet, would, AFAIK, not be an option.

It would seem that MS Works can export the database as a DBF format
database, though I have not tried it.  Before I get started, I was
wondering if anyone has been through this problem in the past and used
Python to solve the problem.  Knowing nearly nothing about the DBase
family of application software, and database formats, I find myself
feeling like the information out there is, frankly, a bit overwhelming.

Would the recipe specified in the "dbf to csv" thread be useful here for
a file in DBase IV format?  It of course uses the same extension, but I
am not sure if the file semantics are at all similar.  The idea at the
end would be to probably create a database on an small SQL server (like
MySQL) and let the person access their data using ODBC on their Windows
workstation so that they can create form letters and the like.  They do
not have access to MS Office's Access product, nor do they wish to use
OOo Base (and I can't say that I blame them -- it seems to crash far too
often to be considered reliable stuff).

	-- Mike


From johnjsal at gmail.com  Thu Nov  2 15:28:13 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 12:28:13 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
Message-ID: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>

Can someone explain to me why the first version of this method works,
but the second one doesn't? All I've changed (I think) is how the
information is nested. The error I'm getting is that the call to
xrc.XRCCTRL is not working in the second example. Instead of getting
the appropriate widget, it's returning None. Is this a result of the
nesting, or the for loops perhaps?

Thanks.


    def OnSaveRecord(self, event):
        textfield_values = []
        for tab in self.notebook.GetCurrentPage().GetChildren():
            for table in self.get_textfield_ids():
                table_values = []
                for textfield_id in table:
                    table_values.append(xrc.XRCCTRL(tab,
textfield_id).GetValue())
                textfield_values.append(table_values)
        self.save_to_database(textfield_values)

    def get_textfield_ids(self):
        return (('firstName', 'middleName', 'lastName', 'birthMonth',
                'birthDay', 'birthYear', 'country', 'state', 'city'),
                ('jobTitle', 'salary', 'labBuilding', 'labRoom',
'labPhone'),
                ('localAddress', 'foreignAddress', 'emailAddress',
'homePhone',
                'foreignPhone', 'cellPhone'), ('university1',
'yearStart1',
                'yearEnd1', 'degree1', 'university2', 'yearStart2',
'yearEnd2',
                'degree2', 'university3', 'yearStart3', 'yearEnd3',
'degree3',
                'university4', 'yearStart4', 'yearEnd4', 'degree4'),
('notes'))

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

    def OnSaveRecord(self, event):
        textfield_values = []
        for tab in self.notebook.GetCurrentPage().GetChildren():
            for textfield_id in self.get_textfield_ids():
                textfield_values.append(xrc.XRCCTRL(tab,
textfield_id).GetValue())
        self.save_to_database(textfield_values)

    def get_textfield_ids(self):
        return ('firstName', 'middleName', 'lastName', 'birthMonth',
                'birthDay', 'birthYear', 'country', 'state', 'city',
                'jobTitle', 'salary', 'labBuilding', 'labRoom',
'labPhone',
                'localAddress', 'foreignAddress', 'emailAddress',
'homePhone',
                'foreignPhone', 'cellPhone', 'university1',
'yearStart1',
                'yearEnd1', 'degree1', 'university2', 'yearStart2',
'yearEnd2',
                'degree2', 'university3', 'yearStart3', 'yearEnd3',
'degree3',
                'university4', 'yearStart4', 'yearEnd4', 'degree4',
'notes')

Traceback (most recent call last):
  File "C:\Python25\myscripts\labdb\dbapp.py", line 91, in OnSaveRecord
    table_values.append(xrc.XRCCTRL(tab, textfield_id).GetValue())
AttributeError: 'NoneType' object has no attribute 'GetValue'



From deets at nospam.web.de  Mon Nov 13 05:10:33 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Nov 2006 11:10:33 +0100
Subject: logging
References: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>
Message-ID: <4rqukpFshgdkU1@mid.uni-berlin.de>

alain.marcel at svd-info.fr wrote:

> Hi all !
> How to remove a logger ?
> There si no logging.removeLogger(name) method.
> I've a lot of objects that create loging.
> When objects are destroyed, associated logger are not. This create
> memory leak...

Instead of removing unused loggers, reuse them. Calling getLogger with an
already known name will not create a new one, but instead return the
already existing one. 

Diez


From humitos at gmail.com  Mon Nov 20 17:09:23 2006
From: humitos at gmail.com (Manuel Kaufmann)
Date: Mon, 20 Nov 2006 19:09:23 -0300
Subject: pysqlite -- anyone have the windows installer for Python 2.4?
In-Reply-To: <1164033134.866114.182320@h54g2000cwb.googlegroups.com>
References: <1164033134.866114.182320@h54g2000cwb.googlegroups.com>
Message-ID: <200611201909.23459.humitos@gmail.com>

El Lunes, 20 de Noviembre de 2006 11:32, abcd escribi?:
> anyone have the windows installer for Python 2.4 of pysqlite2???  their
> site is down and I need it.
>
> thanks in advance.

I don't speak English, but it can help you:

http://initd.org/pub/software/pysqlite/releases/2.3/2.3.2/pysqlite-2.3.2.win32-py2.4.exe

Or you can choice another version:

http://initd.org/pub/software/pysqlite/releases

Good bye!

-- 
Kaufmann Manuel


From apardon at forel.vub.ac.be  Tue Nov 14 08:34:04 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Nov 2006 13:34:04 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
	<mailman.135.1163506715.32031.python-list@python.org>
Message-ID: <slrneljhec.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-14, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Antoon Pardon wrote:
>
>> Why not? My impression is that removing redundancy is considered
>> a positive thing here in c.p.l.
>
> so why are you still here?

Because I have a different opinion and I don't need your permission.

-- 
Antoon Pardon


From steve at holdenweb.com  Wed Nov  1 15:01:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 01 Nov 2006 20:01:49 +0000
Subject: Where do nested functions live?
In-Reply-To: <4548DDFC.9020409@vtxmail.ch>
References: <Xns986D79E677842rtwfreenetREMOVEcouk@216.196.109.145>	<mailman.1556.1162316571.11739.python-list@python.org>	<Xns986E6E3BBB3B2rtwfreenetREMOVEcouk@216.196.109.145>
	<4548DDFC.9020409@vtxmail.ch>
Message-ID: <eiaud8$1pn$1@sea.gmane.org>

Frederic Rentsch wrote:
> Rob Williscroft wrote:
> 
>>Frederic Rentsch wrote in news:mailman.1556.1162316571.11739.python-
>>list at python.org in comp.lang.python:
>>
>>  
>>
>>>Rob Williscroft wrote:
>>>    
>>>
>>>>Frederic Rentsch wrote in news:mailman.1536.1162292996.11739.python-
>>>>      
>>>>
>>>>>Rob Williscroft wrote:
>>>>>        
>>>>>
>>>>>>Frederic Rentsch wrote in news:mailman.1428.1162113628.11739.python-
>>>>>>          
>>
>>[snip]
>>
>>  
>>
>>>>>>      
>>>>>>          
>>>>>
>>>>>Here I'm lost. What's the advantage of this? It looks more convoluted.
>>>>>    
>>>>>        
>>>>
>>>>I'll agree that having to explicitly define a namespace class first 
>>>>does add some convolution. 
>>>>
>>>>But if you refer to having to prefix you "outer" variables with
>>>>"scope." then this would be the same as claiming that the explict use
>>>>of self is convoluted, which is a valid opinion, so fair enough, but
>>>>I can't say that I agree. 
>>>>
>>>>  
>>>>      
>>>
>>>I didn't mean to call into question. I didn't understand the advantage 
>>>of the added complexity of your second example over the first.
>>>
>>>    
>>
>>Ok, I missed your point, as for the second example it was an attempt 
>>to show that further refactoring from a function with local functions
>>that are sharing some state via the scope object, to a class with
>>methods that share state via the instance, is a matter of editing
>>a few lines.  
>>
>>This is useful when a function grows too large (for some value of 
>>"too large"). As an added bonus you get to use the same thechniques
>>with both styles of coding.
>> 
>>[snip]
>>
>>Rob.
>>  
> 
> 
> Rob,
> 
> Thanks a lot for your input. I'll have to digest that. Another question 
> I had and forgot was this: Since we have a class that goes out of scope 
> when the function returns, and we don't need more than one instance, why 
> bother to make an instance? Why not use the class object itself?
> 
> def whatever( new_ms ):
> 
>   class scope ( object ):
> 
>   def inner():
>     scope.mseconds = new_ms - s * 1000       
>     m, scope.seconds = divmod (s, 60)
>     h, scope.minutes = divmod (m, 60)
>     d, scope.hours = divmod (h, 24)
>     scope.weeks, scope.days = divmod (d, 7)     
> 
That will need to be

   class scope(object): pass

to avoid syntax errors, I suspect. There doesn't seem to be any reason 
why you couldn't use a class instead of an instance. And, of course, 
either might give you problems in the case of a recursive inner function.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From jgodoy at gmail.com  Fri Nov 10 18:36:32 2006
From: jgodoy at gmail.com (Jorge Godoy)
Date: Fri, 10 Nov 2006 21:36:32 -0200
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<mailman.2035.1163170200.11739.python-list@python.org>
Message-ID: <874pt6kh6n.fsf@gmail.com>

"Jorge Vargas" <jorge.vargas at gmail.com> writes:

> code. In python noone runs the pyc files, the interpreter takes care
> of this for you.

This is not true.  It is one way to avoid having your source lying around.
The same can be done with .pyo... 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From me at tim-adler.com  Tue Nov 28 03:24:42 2006
From: me at tim-adler.com (Tim Adler)
Date: 28 Nov 2006 00:24:42 -0800
Subject: Error when installing the Python Imaging Library
In-Reply-To: <mailman.790.1164702053.32031.python-list@python.org>
References: <1164700897.128779.180580@j44g2000cwa.googlegroups.com>
	<mailman.790.1164702053.32031.python-list@python.org>
Message-ID: <1164702282.511998.227500@14g2000cws.googlegroups.com>

Thx, I got it. I installed PIL through the automatic install tool.
Which resolved some dependencies.

Fredrik Lundh schrieb:

> Tim Adler wrote:
>
> > I'm quite new to Python. I'm working on a webproject with Django and
> > need to install the Python Imaging Library. It worked fine under Mac OS
> > but when I try it on my Linux server. It gives me this error:
> >
> > PasteBin Link: http://phpfi.com/179314
>  >
> > I don't really know what is wrong. Can somebody point me directions. I
> > really need the PIL to work.
>
> the important line is
>
> _imagingtk.c:20:16: tk.h: No such file or directory
>
> which indicates that you don't have complete Tcl/Tk development
> libraries on your machine (but you obviously have enough pieces of
> them for PIL to think that you have them).
>
> look for tcl-devel and tk-devel or similar packages in your Linux
> provider's package repository.
> 
> </F>



From hollowspook at gmail.com  Sat Nov 25 09:09:55 2006
From: hollowspook at gmail.com (hollowspook)
Date: 25 Nov 2006 06:09:55 -0800
Subject: problem with global variable in a module
Message-ID: <1164463795.849460.124060@j72g2000cwa.googlegroups.com>

def aa():
    global b
    b=b+1
    print b

b=1
aa()

The above code runs well in python shell.

However I  have a problem as follows.

new a file named test.py
------------------------------------------------------------------------

def aa():
    global b
    b=b+1
    print b
-------------------------------------------------------------------------

Then in python shell,

from test import *
b=1
aa()

The error message is :
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "test.py", line 3, in aa
    b=b+1
NameError: global name 'b' is not defined

Why this happens? Please do me a favor. 
Thanks in advance



From robin at NOSPAMreportlab.com  Sat Nov 25 18:26:53 2006
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Sat, 25 Nov 2006 23:26:53 +0000
Subject: Graph Data Structures
In-Reply-To: <mailman.725.1164493852.32031.python-list@python.org>
References: <mailman.714.1164463530.32031.python-list@python.org>	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
	<mailman.725.1164493852.32031.python-list@python.org>
Message-ID: <4568D13D.8050203@jessikat.plus.net>

Nathan Harmston wrote:
>> > https://networkx.lanl.gov/
......

I got it back just once, but when I clicked again I see this



RuntimeError	Python 2.4.4c1: /usr/bin/python
Sat Nov 25 16:21:16 2006

A problem occurred in a Python script. Here is the sequence of function 
calls leading up to the error, in the order they occurred.
  /build/bdist.linux-x86_64/egg/tracrst/macro.py in 
render_macro(self=<tracrst.macro.TracReSTMacro object>, req=<trac.web.api

......

  782       self.__dict__["_parent_pool"] = \
   783         parent_pool or libsvn.core.application_pool;
   784       if self.__dict__["_parent_pool"]:
self = <libsvn.repos.svn_repos_t; proxy of C svn_repos_t instance>, 
self.__dict__ = {'this': <Swig Object of type 'svn_repos_t *'>}, 
parent_pool = <libsvn.core.apr_pool_t; proxy of C apr_pool_t instance>, 
libsvn = <module 'libsvn' from 
'/usr/lib/python2.4/site-packages/libsvn/__init__.pyc'>, libsvn.core = 
<module 'libsvn.core' from 
'/usr/lib/python2.4/site-packages/libsvn/core.pyc'>, 
libsvn.core.application_pool = <libsvn.core.apr_pool_t; proxy of C 
apr_pool_t instance>

RuntimeError: instance.__dict__ not accessible in restricted mode
       args = ('instance.__dict__ not accessible in restricted mode',)


perhaps I'm seeing different apache processes or something
-- 
Robin Becker


From glebus at asd.iao.ru  Sat Nov 18 15:49:43 2006
From: glebus at asd.iao.ru (Gleb Kulikov)
Date: Sun, 19 Nov 2006 02:49:43 +0600
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
Message-ID: <200611190249.43660.glebus@asd.iao.ru>

? ????????? ?? ??????????? 19 ?????? 2006 01:01 Kirill Simonov ???????:

> first programming language to high school students?  It is necessary

> Unfortunately, most IDEs I tried failed miserably in this respect.  My

> For the record, I've checked IDLE, PythonWin, Eric, DrPython, SPE, and

Pardon, eric (eric-3.9.0-alt1 is in use), "speak" Russian quite well.
We are trying to teach schoolers with a Python in an advanced elementary 
school (9th - 11th). Yes, there is a problem with Cyrillic in eric's built-in 
interpreter window (KOI8 locale is used) and *only* in the built-in 
interpreter window, but there is short workaround for it: if avoid "# -*- 
coding..." declaration, Cyrillic is painted well.

-- 
      ?????, /GLeb

UIN: 15341920
jabber://gleb at asd.iao.ru
sip://2387245 at sipnet.ru			(telephony)
skype://gleb_kulikov.tomsk		(telephony)
sip://20000204 at sip.pctel.ru		(telephony)
netmail: 2:5005/78


From tony_ha2002 at yahoo.co.uk  Fri Nov 17 09:06:28 2006
From: tony_ha2002 at yahoo.co.uk (TonyHa)
Date: 17 Nov 2006 06:06:28 -0800
Subject: How to pass an argument to a python program open in IDLE?
In-Reply-To: <1163611493.817940.299130@f16g2000cwb.googlegroups.com>
References: <ZMG6h.110$nx.65@lon04-news-philips>
	<1163611493.817940.299130@f16g2000cwb.googlegroups.com>
Message-ID: <1163772388.931433.129480@f16g2000cwb.googlegroups.com>

Hello Josh,

Thanks for the reply. But I am not sure I understand your reply, may be
I need to explain my problem a bit more. I have a Python script which
needs an input argument to run.
e.g. python myscript.py xilinx. which run fine.

My problem is this: When I start IDLE GUI, then I open my script with
the edit window. (i.e.
File -> open). I run my script under the edit window using run -> run
module or F5. But IDLE does not allow me to input the argument to my
script, i.e. IDLE runs without prompting for the argument, then my
script fails. I wonder how can I pass the argument to my script under
IDLE?

Tony Ha.

Joshua.R.English at gmail.com wrote:
> On Nov 15, 7:56 am, tony... at philips.com wrote:
> > Hello,
> >
> > I have open a Python program in the IDLE, but when I select the "run
> > module" under "run" menu, it
> > does not allow me to pass an argument to my Python program!
> > How do you pass an argument to a Python program under the IDLE? Thanks for
> > you help!
>
> I'm using Python on an old Mac with the IDE.  I think my solution would
> work.
>
> opt_parser = OptionParser()
>
> def myfunc(argstring):
> 	(self.options,self.args) =
> sub_opt_parser.parse_args(argstring.split())
> 	f not self.args: self.args = "[default arguments]".split()
> 	...
>
> if __name__=="__main__":
> 	myfunc(argstring)
>
>
> This means editing the file every time.  Since I'm on a Mac, I can also
> use:
> if __name__=="__main__":
> 	from EasyDialogs import AskString
> 	args = AskString('Options and Arguments')
>
> 	myfunc(args)
>
> I'm not sure how easy this is to implement on other platforms
>
> Josh English
> Joshua.R.English at gmail.com
> http://www.spiritone.com/~english



From aboudouvas at panafonet.gr  Wed Nov  8 05:37:42 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 8 Nov 2006 02:37:42 -0800
Subject: Python deployment options.
Message-ID: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>


Hi to all folks here,

i just bought a book and started reading about this language.
I want to ask what options do we have to deploy a python program to
users that do not have the labguage installed ??

I mean, can i make an executable file, or something that contains the
runtime and the modules that the program only use or am i forced to
download the language to the user machine so the .py  files can be run
??

Thanks in advance,

king kikapu



From annya20inbe at gmail.com  Thu Nov  2 03:30:50 2006
From: annya20inbe at gmail.com (annya20inbe at gmail.com)
Date: 2 Nov 2006 00:30:50 -0800
Subject: splitter control
Message-ID: <1162456250.711968.176690@e3g2000cwe.googlegroups.com>

Is anybody know splitter control implementaion in c...



From fredrik at pythonware.com  Mon Nov 13 08:58:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 14:58:47 +0100
Subject: httplib.InvalidURL: nonnumeric port: For characters
	intheproxypassword in URL
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com><1163423258.919153.281260@b28g2000cwb.googlegroups.com><mailman.55.1163423879.32031.python-list@python.org>
	<1163424914.967174.302610@e3g2000cwe.googlegroups.com>
Message-ID: <ej9tmn$3vo$1@sea.gmane.org>

"Phoe6" wrote:

> Am sorry Fred. The same problem:
>
>  File "C:\Python24\lib\httplib.py", line 598, in _set_hostport
>    raise InvalidURL("nonnumeric port: '%s'" % host[i+1:])
> httplib.InvalidURL: nonnumeric port: '|\'
>
> I dont think its an issue to be resolved with quote().

can you post the code you're using to build the URI ?

</F> 





From nateastle at gmail.com  Sun Nov 19 01:17:29 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 18 Nov 2006 22:17:29 -0800
Subject: basic python questions
In-Reply-To: <4s8u91Fumc9aU1@mid.uni-berlin.de>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
Message-ID: <1163917049.387309.150740@e3g2000cwe.googlegroups.com>

So I implemented the exception spcified and in testing it returns:

DeprecationWarning: raising a string exception is deprecated

I am not to worried about depreciation warning however, out of
curiosity, what would the better way be to handle this? Is there a way
that (web site, help documentation, etc...) I would be able to find
this? I am running this in Python 2.5

Diez B. Roggisch wrote:
> nateastle at gmail.com schrieb:
> > I have taken the coments and think I have implemented most. My only
>
> Unfortunately, no.
>
> > question is how to use the enumerator. Here is what I did, I have tried
> > a couple of things but was unable to figure out how to get the line
> > number.
> >
> > def Xref(filename):
> >     try:
> >         fp = open(filename, "r")
> >     except:
> >         raise "Couldn't read input file \"%s\"" % filename
>
> You still got that I-catch-all-except in there.
> This will produce subtle bugs when you e.g. misspell a variable name:
>
> filename = '/tmp/foo'
> try:
>     f = open(fliename, 'r')
> except:
>     raise "can't open filename"
>
>
> Please notice the wrong-spelled 'fliename'.
>
> This OTOH will give you more clues on what really goes wrong:
>
>
>
> filename = '/tmp/foo'
> try:
>     f = open(fliename, 'r')
> except IOError:
>     raise "can't open filename"
> 
> 
> Diez



From deets at nospam.web.de  Wed Nov 22 12:08:35 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 22 Nov 2006 18:08:35 +0100
Subject: PyQt app in seperate thread
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
	<1164206635.601219.36860@j44g2000cwa.googlegroups.com>
	<4sjd17FvqtpmU1@mid.uni-berlin.de>
	<1164214888.287285.153720@m7g2000cwm.googlegroups.com>
Message-ID: <4sjegjFvnnl6U1@mid.uni-berlin.de>

anders wrote:

> 
> Diez B. Roggisch wrote:
>> > OK I see that now. Thanks for pointing that out. So basically, I can't
>> > do what I want at all. That's a bit of a pain. Is there no way of
>> > tricking Qt into thinking I'm running it in the main thread?
>>
>> Maybe you can either invert the thread-roles - that is, run your "main"
>> application in a thread, and if needed start the Qt-thing, or you might
>> consider spawning a process and using pyro. Which will work very neat,
>> done so myself.
>>
>> Diez
> 
> Yeah I was thinking that's going to have to be the way to go... I can't
> run the main app in a child thread, so I'll have to spawn the GUI as a
> seperate process and communicate with it. Didn't know about pyro
> though, thanks for the link. You've used it successfully with PyQt in a
> seperate process?

Yup. I used it to spawn a python interpreter in a subprocess, and
communicate some stuff between that and my main GUI app. The idea was to
have a scriptable application, which allowed you could kill the script.

Diez


From aboudouvas at panafonet.gr  Wed Nov  8 06:42:09 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 8 Nov 2006 03:42:09 -0800
Subject: Python deployment options.
In-Reply-To: <1162985073.163257.110180@m73g2000cwd.googlegroups.com>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
Message-ID: <1162986129.233443.268730@h54g2000cwb.googlegroups.com>


I see...So, if these are the only options, the only "safe" bet is to
install the language on the machine (beeing Win, Linux or Mac)
and execute the .py files, right ??


On Nov 8, 1:24 pm, "Chris_147" <chris.van.b... at gmail.com> wrote:
> king kikapu wrote:
> > Hi to all folks here,
>
> > i just bought a book and started reading about this language.
> > I want to ask what options do we have to deploy a python program to
> > users that do not have the labguage installed ??
>
> > I mean, can i make an executable file, or something that contains the
> > runtime and the modules that the program only use or am i forced to
> > download the language to the user machine so the .py  files can be run
> > ??
>
> > Thanks in advance,
>
> > king kikapuWell, on Windows you have to look for the Py2Exe package
> (www.py2exe.org)
> On Mac OS X you can use Py2App
> (http://undefined.org/python/py2app.html)
>
> Mind you, on Windows there is one big potentional problem: Python is
> compiled with Visual Studio 2003 and needs msvcr71.dll.  So Py2Exe
> wants to distribute that dll also, but if you don't have a valid Visual
> Studio license, you are not allowed to.
> It is explained further in this thread:http://groups.google.com/group/comp.lang.python/browse_frm/thread/bcc...
>
> I doubt Microsoft will unleash their lawyers on you, but it is a
> problem.



From danny_milo at yahoo.com  Tue Nov 21 17:43:03 2006
From: danny_milo at yahoo.com (Danny Milosavljevic)
Date: Tue, 21 Nov 2006 22:43:03 +0000 (UTC)
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
	<1163530584.269684.214520@h48g2000cwc.googlegroups.com>
	<455b395e$0$3184$426a34cc@news.free.fr>
	<1163701377.322969.109090@h48g2000cwc.googlegroups.com>
Message-ID: <newscache$wpp39j$8cm$1@news.liwest.at>

Hi,

On Thu, 16 Nov 2006 10:22:57 -0800, "dakman wrote:

> Yes of course python can handle of these things, but have you actually
> compared them to something written in C? Even if the app was converted
> into bytecode, it's still not as fast as an executable, that's all I am
> saying.

I used to routinely write gui programs (data entry and such) in python
first and then ported them down to C for speed. I stopped the downporting,
isn't worth it, I just stay in python.

Make no mistake, python itself is slow enough. Its just that with today's
CPUs, no, even with CPUs 3 years old (mine is an Athlon XP), most
of the time slow is still faster than needed.

Once you start to do heavy-lifting in python, the picture becomes bleak,
though (I tried to write a Truetype Font Repacker
http://www.scratchpost.org/hacks/truetype-font-repacker/ without using any
external font libraries and its dog slow).

That said, most programming (for me also at work) consists of glue code.

And there still is that python to C++ converter, what was it called? 
And python for dotnet. And Jython.
Those should help with speed a bit.

cheers,
  Danny


From erokar at gmail.com  Tue Nov 14 14:00:53 2006
From: erokar at gmail.com (erokar at gmail.com)
Date: 14 Nov 2006 11:00:53 -0800
Subject: How to check for instances of a class
Message-ID: <1163530852.868370.104780@h54g2000cwb.googlegroups.com>

Traversing a list of variables, I need to check wheter an element in
the list is an instance of a (user defined) class. What cind of
comparison operator can I use? Can't seem to find this in the
documentation. I anyone have an example it is much appreciated.



From XX.XmcX at XX.XmclaveauX.com  Thu Nov  9 04:27:52 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Thu, 09 Nov 2006 10:27:52 +0100
Subject: Python to tell what is the IP of my PC .
References: <1163028931.055027.170040@h48g2000cwc.googlegroups.com>
Message-ID: <mn.4a737d6b4564cbf2.46195@XX.XmclaveauX.com>

http://monip.org/

-- 
@-salutations

Michel Claveau




From dlenski at gmail.com  Tue Nov 14 10:17:20 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 14 Nov 2006 07:17:20 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.120.1163491857.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<ej2nrk$qea$2@sea.gmane.org> <ej3vbg$r81$2@sea.gmane.org>
	<8c7f10c60611130605i382312c4l829d6167ae0a5828@mail.gmail.com>
	<mailman.120.1163491857.32031.python-list@python.org>
Message-ID: <1163517440.042628.219590@h48g2000cwc.googlegroups.com>

Hendrik van Rooyen wrote:
> This is true - and it is actually also an intractable problem - if you look at
> what your daughter wrote, you get the feeling that you should be able to write
> an interpreter that can implement what she meant, because it is quite clear to
> you - until you try to write the specs...

Unfortunately natural language is completely riddled with ambiguities
about negation and conjunction.  It doesn't seem like a good idea for
programming languages to emulate these too closely, even if it does
make for more "natural" constructions.

For example:
"You must not go there." means "You are forbidden to go there."
"You do not have to go there." means "You are not required to go
there."
Similar negations of two English verbs with virtually identical meaning
makes quite a difference in the semantics of the complete sentence!

Likewise, double negation is perfectly equivalent to single negation in
many languages, including in some dialects of English:
"I ain't got time." means "I don't have time."
"I ain't got no time." means "I don't have time."

Another problem is that the English word "or" sometimes means
"inclusive or" and sometimes means "exclusive or":
"Do you have any brothers or sisters?" (inclusive or)
"You can carry on a briefcase or a backpack." (exclusive or)

I think part of learning to think like a computer is learning to stop
associating computer logic too strongly with the natural language
meanings of "and", "or", and "not".

Dan



From brenNOSPAMbarn at NObrenSPAMbarn.net  Mon Nov 27 14:14:10 2006
From: brenNOSPAMbarn at NObrenSPAMbarn.net (OKB (not okblacke))
Date: Mon, 27 Nov 2006 19:14:10 GMT
Subject: Inheritance from builtin list and override of methods.
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr>
	<ekecd9$e8c$1@sea.gmane.org>
	<mailman.768.1164637881.32031.python-list@python.org>
	<Xns988896361B9C5duncanbooth@127.0.0.1>
Message-ID: <Xns9888724C01B78OKB@199.45.49.11>

Duncan Booth wrote:

>> And is there a mechanism in Python that will allow me to override
>> the operators of a class, for all its occurrences, even the ones
>> implemented on C built-in objects? 
> 
> No.

    	For what it's worth, which is undoubtedly nothing, this is 
something that I think needs to change.  All this talk about new-style 
classes and class-type unification is empty words if you can't override 
anything on any type without having to know whether it's written in C or 
Python.

-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From Roberto.Bonvallet at cern.ch  Thu Nov 30 08:42:34 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Thu, 30 Nov 2006 13:42:34 +0000 (UTC)
Subject: PythonTidy
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
	<ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
Message-ID: <ekmn4a$36d$2@cernne03.cern.ch>

Laurent Pointal wrote:
> ...
>> # vim: set fileencoding=utf-8 :
> ...
>> # -*- coding: utf-8 -*-
> ...
> 
> This is not "emacs-style", this is Python normalized source encoding
> directive for correct interpretation of u"..." strings by Python
> interpreter.
> 
> See http://www.python.org/dev/peps/pep-0263/

The -*- syntax is emacs-style.  The encoding directive is anything that
matches r"coding[=:]\s*([-\w.]+)".  The docs recommend to use either
emacs-style or vim-style.  See http://docs.python.org/ref/encodings.html

Cheers,
-- 
Roberto Bonvallet


From bdesth.quelquechose at free.quelquepart.fr  Mon Nov 20 16:34:35 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 20 Nov 2006 22:34:35 +0100
Subject: OODB vs RDBMS
In-Reply-To: <4se3omFv6reaU1@mid.individual.net>
References: <4se3omFv6reaU1@mid.individual.net>
Message-ID: <45621a57$0$10443$426a74cc@news.free.fr>

Thomas Guettler a ?crit :
> Hi,
> 
(snip lot of questions about OR mappers)

http://www.sqlalchemy.org/


From carlos80 at gmail.com  Tue Nov 14 02:22:59 2006
From: carlos80 at gmail.com (los)
Date: 13 Nov 2006 23:22:59 -0800
Subject: Need help installing Tkinter/tkdnd
Message-ID: <1163488979.390224.116500@h54g2000cwb.googlegroups.com>

Hi I am trying to install the tk drag and drop to python 2.4.

I installed python to c:\python24

I downloaded tkdnd-1.0a2.tar.gz, and TkinterDnD-0.4.zip.

After I unzipped tkdnd-1.0a2.tar.gz, I copied the lib directory to
c:\python24\tcl, now in C:\Python24\tcl\lib\tkdnd I have;
libtkdnd.dll pkgIndex.tcl tkDND_Utils.tcl.

I then unzipped TkinterDnD-0.4.zip and copied the TkinterDnD folder to
C:\Python24\Lib\site-packages. In this folder I have;
TkinterDnD.py TkinterDnD.pyc __init__.py __init__.pyc

now when I go to python I get this error:
>>> from TkinterDnD import *
>>> root = TkinterDnD.Tk()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "C:\Python24\Lib\site-packages\TkinterDnD\TkinterDnD.py", line
352, in __init__
self.TkdndVersion = _require(self)
File "C:\Python24\Lib\site-packages\TkinterDnD\TkinterDnD.py", line
333, in _require
tkdndver = tkroot.tk.call('package', 'require', 'tkdnd')
_tkinter.TclError: can't find package tkdnd

Can someone explain what's going on? Thanks



From sjdevnull at yahoo.com  Fri Nov 17 16:27:04 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 17 Nov 2006 13:27:04 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163727857.620445.231250@b28g2000cwb.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<1163715688.959899.65990@h48g2000cwc.googlegroups.com>
	<1163727857.620445.231250@b28g2000cwb.googlegroups.com>
Message-ID: <1163798824.467270.300930@m73g2000cwd.googlegroups.com>

Luis M. Gonz?lez wrote:
> sjdevnull at yahoo.com ha escrito:
>
> > Luis M. Gonz?lez wrote:
> > > OK. But since when has python been considered a viable alternative for
> > > web development?
> > > As a generalp purpose language, it's older.
> > > But as a web development language, it's olnly when people started to
> > > look for the "rails killer" and many python alternatives started to
> > > come up (although Django has been in development for a long time before
> > > all this hype).
> >
> > Huh?  I've been doing paid python web work since 2000.  I'm fairly sure
> > that Yahoo! groups predates that by a while, and I know that
> > mod_python/httpdapy goes back at least to 1998 (and Python CGI predates
> > that significantly).
>
> Do not forget the subject of this thread.
> Nobody is criticizing python here. I am a "believer"!

I was responding to the statement "since when has python been
considered a viable alternative for web development".

At any rate, I haven't had any problems finding cheap Python hosts, so
I think that's largely a straw man--there are _more_ PHP hosts out
there, but it's not as though you're limited to only 2-3 Python hosts.
There are plenty to choose from.



From sp1d3rx at gmail.com  Thu Nov 30 19:21:27 2006
From: sp1d3rx at gmail.com (sp1d3rx at gmail.com)
Date: 30 Nov 2006 16:21:27 -0800
Subject: String formatters with variable argument length
In-Reply-To: <mailman.905.1164931966.32031.python-list@python.org>
References: <mailman.905.1164931966.32031.python-list@python.org>
Message-ID: <1164932487.316686.131100@80g2000cwy.googlegroups.com>

How do you know which ones to use? Your best bet is to write a handler
for the TypeError and give a meaningful error message.

Fredrik Tolf wrote:
> I've been trying to get the string formatting operator (%) to work with
> more arguments than the format string requires, but I can find no way to
> do that. For example:
>
> >>> "%i" % 10
> '10'
> >>> "i" % 10
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: not all arguments converted during string formatting
>
> The thing is, I want to get format strings from the user, and I don't
> want to require the user to consume all the arguments. docs.python.org
> doesn't seem to have any clues on how to achieve this, and I can't think
> of what to google for.
> 
> Could it be as I fear, that it is impossible?
> 
> Fredrik Tolf



From horpner at yahoo.com  Tue Nov 21 09:18:25 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 21 Nov 2006 15:18:25 +0100
Subject: Python development time is faster.
References: <1A4BF05172023E468CB6E867923BC90402B6E37D@accmail2.sunbelt.org>
	<mailman.522.1164068972.32031.python-list@python.org>
Message-ID: <slrnem62og.1b4.horpner@FIAD06.norwich.edu>

On 2006-11-21, Gabriel Genellina <gagsl-py at yahoo.com.ar> wrote:
> And loop invariants are good comments sometimes.

They are even better as code, though not always practical that
way.

-- 
Neil Cerutti


From fredrik at pythonware.com  Sat Nov 18 07:49:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 13:49:57 +0100
Subject: installing modules
In-Reply-To: <1163853406.767016.75110@j44g2000cwa.googlegroups.com>
References: <1163853406.767016.75110@j44g2000cwa.googlegroups.com>
Message-ID: <ejmvhl$7j6$1@sea.gmane.org>

kilnhead wrote:

> I am sure this has been asked a gazillion times, but here it is again.
> When installing  something like pyRTF, I extract the zip file to a
> folder called pyRTFtemp, and then run "setup.py install" in that
> folder. After that, can I get rid of the pyRTFtemp folder

in general, yes.  there may be useful documentation files and examples 
left in the distribution directory, though; it's usually doesn't hurt to 
check the README for additional information.

</F>



From sjmachin at lexicon.net  Sat Nov 25 23:04:45 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 20:04:45 -0800
Subject: Return float problem.
References: <1164467735.644775.289030@m7g2000cwm.googlegroups.com>
	<1164481894.887091.196160@l39g2000cwd.googlegroups.com>
	<1164510774.952205.312320@14g2000cws.googlegroups.com>
Message-ID: <1164513885.117026.251140@h54g2000cwb.googlegroups.com>

YunBin Lee wrote:
> John, Thanks for your help!
>
> > Did you notice that the garbage is a whole number? Why? Because you
> > have been (more or less) plucking ints out of some arbitrary place on
> > the stack, floating them, and printing them.
>
> I don't know how to solve it (or the right way), could you give me some
> examples?

Is this homework?

Examples of what? Do you want me to write your code for you?

Examples? The Internet is loaded with *working* example C code split
over several .c and .h files.

How much C have you done? In other words, what is your level of
expertise? I would have thought that function prototypes and include
files would be something you would have already mastered before you
tried to write a Python extension wrapper for some C code.

You have been given 3 big fat hints.  If you didn't understand any of
them, after reference to your C textbook and Googling, please feel free
to ask again.



From jeremy+complangpython at jeremysanders.net  Thu Nov 23 06:01:18 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Thu, 23 Nov 2006 11:01:18 +0000
Subject: PyQt app in seperate thread
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
	<1164206635.601219.36860@j44g2000cwa.googlegroups.com>
Message-ID: <ek3v1u$nhc$1@gemini.csx.cam.ac.uk>

anders wrote:

> OK I see that now. Thanks for pointing that out. So basically, I can't
> do what I want at all. That's a bit of a pain. Is there no way of
> tricking Qt into thinking I'm running it in the main thread?

I have an app which runs Qt in a separate thread and allows the user to send
it python commands from the main thread. Have a look at this code to see
how it works:

http://svn.gna.org/viewcvs/veusz/branches/qt4/embed.py?rev=530&view=markup

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From stephen04 at tiscali.co.uk  Tue Nov 21 13:31:13 2006
From: stephen04 at tiscali.co.uk (stephen04 at tiscali.co.uk)
Date: Tue, 21 Nov 2006 18:31:13 -0000
Subject: Reference class in class creation
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
Message-ID: <456345f5$1_1@mk-nntp-2.news.uk.tiscali.com>

class Foo(object):
    me = None
    def __init__(self):
       Foo.me = self

easy!



"Gregor Horvath" <gh at gregor-horvath.com> wrote in message 
news:a1b59$4562eff8$547078de$21737 at news.chello.at...
> Hi,
>
> I want to reference a class itself in its body:
>
> class SomeElement(object):
> def __init__(self, mycontainer):
> self.mycontainer=mycontainer
>
> class SomeContainer(object):
> a = SomeElement(SomeContainer)
>
>
> Unfortunatly this does not work since the name SomeContainer is not
> definied at class creation time of SomeContainer:
>
> /tmp/python-9309vMe.py in SomeContainer()
>      4
>      5 class SomeContainer(object):
> ----> 6 a = SomeElement(SomeContainer)
>      7
>      8
>
> NameError: name 'SomeContainer' is not defined
>
>
> How to do this?
>
> Unfortunatly the obvious:
>
> class SomeContainer(object):
> def __init__(self):
> self.a = SomeElement(SomeContainer)
>
> is not possible because of other constraints.
>
> -- 
> Servus, Gregor
> 




From fredrik at pythonware.com  Tue Nov 14 07:33:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 13:33:11 +0100
Subject: __cmp__ between dissimilar objects
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
Message-ID: <ejcd27$bmq$1@sea.gmane.org>

insyte at gmail.com wrote:

>I have a class that has, as an attribute, an instance of
> datetime.datetime().  I would like to be able to compare my class
> directly to instances of datetime.datetime in addition to other
> instances of my class.  The value used for the comparison in either
> case should be the value of the datetime attribute of the class:
>
> from datetime import datetime
>
> class GeneralizedTime(object):
>    def __init__(self, time=None):
>        if time is None:
>            self.datetime = datetime.now()
>    def __cmp__(self, x):
>        if isinstance(x, GeneralizedTime):
>            return cmp(self.datetime, x.datetime)
>        if isinstance(x, datetime):
>            return cmp(self.datetime, x)
>
>>>> import datetime
>>>>
>>>> GeneralizedTime() > datetime.now()
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> TypeError: can't compare datetime.datetime to GeneralizedTime
>
> Clearly I'm misunderstanding something, here.  As I understand my code,
> I'm directly comparing an instance of datetime (self.datetime) to
> another instance of datetime.

sure looks like you're comparing a datetime instance against a GeneralizeTime
instance to me.

why not just inherit from datetime instead?  or read footnote 4 under "supported
operations" on this page for info on how to implement mixed-type comparisions:

    http://docs.python.org/lib/datetime-datetime.html

</F> 





From ghashsnaga at gmail.com  Sun Nov 26 14:08:46 2006
From: ghashsnaga at gmail.com (Ara Kooser)
Date: Sun, 26 Nov 2006 12:08:46 -0700
Subject: question about function not executing
Message-ID: <2107481c0611261108s3b3f0ae4jdc93e7a1bc48e227@mail.gmail.com>

Hello all,

  I hope I am posting this correctly. I am running Python 2.4.2 on
Slackware 11.0 using IDLE. I am in the process of learning python so I
am writing a text adventure game using functions and global variables
only. I know there is a better way to do this but that is for later.

   When I run the python program it works fine until I try to go west
from my inital start room. I get the room description but no raw_input
prompt. I just get dumped back to >>> in the python shell. I think I
am missing something simple. I pasted in the code below. I am using
gmail so I hope the formatting stays. If not I can send the .py as an
attachment if needed. Thanks.

Ara

Code:


#A sample text adventure game
#Version 0.1
#By Ara Kooser


#Using global variables for the character
#Want to use a function instead

stre = 9
con = 8
inte = 11
agl = 14
app = 10
mag = 6
sz = 9

hp = 17

reputation = 0

stealth = False

quest1 = False
quest2 = False

curse = False
poison = False
diseased = False

ducats = 50
lira = 25
florin = 80


equipment = {'Sword': 1, 'Dagger': 1, 'Walking staff': 1, 'Leather Armor':1}
backpack = {'Flint and steel': 1, 'Rations': 7, 'dressing kit': 6,
'waterskin': 2}
belt_pouch = {}

#####################################################################################

day = False


# help function that will give you a list of commands
def help():
    print "look, examine (object), n, w, e, s, take (item)"
    print "climb, stealth, fishing, herbalism, forage, haggle"
    print "field dressing"
    print "wield (object), attack, flee, close, withdraw"
    print "backpack, belt pouch, cs"
    print "Example: examine book, take ducats, attack orc"

# I want to setup the character has a function but I am not sure how
# to call and modify, the stats, counters, and flags. Currently I am
# setting these as global variables

#def character(self):
#    #Initalize stats
#    self.str = 9
#    self.con = 8
#    self.int = 11
#    self.agl = 14
#    self.app = 10
#    self.mag = 6
#    self.sz  = 9

#    self.hp  = 17

#    #Initalize flags
#    self.quest1 = False
#    self.quest2 = False

#    self.curse  = False
#    self.poison = False
#    self.diseased = False

    #Initalize counters
#    self.ducats = 50
#    self.lira = 25
#    self.florin = 80
#    self.reputation = 0


# Sets up a character sheet to print out to screen
#To do list - make the sheet update as the game progresses
def character_sheet():
    print """\
============================================================================
Name:                       Profession:
Social Class:               Race:

============================================================================
Strength
Constitution
Intelligence
Agility
Appearance
Magic
Size
============================================================================
Ducats:     Lira:       Florin:

Skills: Forage, Haggle, Stealth, Fishing, Herbalism, Climb, Sword, Staff,
Dagger, Field Dressing

Equipment: Backpack, Belt Pouch, Run of the Mill Sword, Dagger, Flint&Steel
1 week food, 2 waterskins, walking stick, dressing kit
============================================================================
"""



def start():
    print '''
        SAMPLE TEXT ADVENTURE V0.1
   You are the last person to leave the small village of Hommlet. The wooden
gate closes behind you and twilight reaches across the land. A dense mist
creeps up out of the ground, only to be kept at bay by the watchmens torches.
Somewhere deep in the woods lies the foul orcs you have tracked for several
days.

    '''

    print

def outside1():
    global hp
    global reputation
    print " Current Hit Points = ",hp
    print " Current Reputation = ",reputation
    print '''   You are outside the town gates. The dirt road heads
(N)orth to another
town several days away. The forest lies (E)ast and (W)est through the
meadows. The
rumors you heard in town describe the orcs as being to the west. The town's gate
is to the (S)outh but it is locked for the night.
Type 'help' for a full list of commands.'''
    print
    prompt_out1()

def out1_desc():
    print '''    The fog is growing denser as the sun sets on the meadows.
    The exits are (N)orth, (E)ast and (W)est.'''
    print
    prompt_out1()

def prompt_out1():
    global day
    prompt_o1 = raw_input("Type a command: ").lower()
    try:

        if prompt_o1 == "help":
            help()
            print
            prompt_out1()

        elif prompt_o1 == "cs":
            character_sheet()
            print
            prompt_out1()

        elif prompt_o1 == "status":
            print " Current Hit Points = ",hp
            print " Current Reputation = ",reputation
            prompt_out1()

        elif prompt_o1 == "backpack":
            print backpack
            prompt_out1()

        elif prompt_o1 == "belt pouch":
            print belt_pouch
            prompt_out1()

        elif prompt_o1 == "equipment":
            print equipment
            prompt_out1()

########################################################################################
        elif prompt_o1 == "examine fog":
            print "The fog seems natural enough for this time of year."
            print
            prompt_out1()

        elif prompt_o1 == "examine road":
            print '''    The road is a well travelled dirt road
winding many leagues'''
            print
            prompt_out1()

        elif prompt_o1 == "look":
            out1_desc()

#######################################################################################
        elif prompt_o1 == "w":
            meadow1()

        elif prompt_o1 == "e":
            meadow2()


        elif prompt_o1 == "s":
            #if day = False
                print "The town's gate is closed for the night"
                print
                prompt_out1()
            #elif
            #    town_1

        elif prompt_o1 == "n":
            n_road()

######################################################################################
        elif prompt_o1 == "haggle":
            print "There is no one to haggle with here."
            promt_out1()

        elif prompt_o1 == "stealth":
            print "You try and be stealthy"
            prompt_out1()

        else:
            print "Please choose another command. That command is invalid"
            print
            prompt_out1()

    except ValueError:
        print "Please choose another command. That command is invalid"
        print
        prompt_out1()


def meadow1():
    global hp
    global reputation
    print " Current Hit Points = ",hp
    print " Current Reputation = ",reputation
    print '''   You are in the meadows that surrond the northwest of
the town. In the day the
field is a golden brown. Right now the grass is waist high and thickly
covered with dew. Your
footsteps and the sounds of the night are dampened here.
   A broken trail leads into the forest (W)est. The meadow continues
(N)orth along the road.
(E)ast takes you back to the road and the entrance to Hommlet. The
wooden wall of the town is
just south of here. Type 'help' for a full list of commands.'''
    print
    prompt_meadow1

def meadow1_desc():
    print '''   The fog bends the grass down and drops of water roll
off the blades. You can see
about 5 paces in front of you. Your clothes are starting to get damp.
The broken trail heads (W)est.
The road is (E)ast. The meadow continues (N)orth and the town's wall
is to the south.'''
    prompt_meadow1

def prompt_meadow1():

    prompt_m1 = raw_input("Type a command: ").lower()
    try:

        if prompt_m1 == "help":
            help()
            print
            prompt_meadow1()

        elif prompt_m1 == "cs":
            character_sheet()
            print
            prompt_meadow1()

        elif prompt_m1 == "status":
            print " Current Hit Points = ",hp
            print " Current Reputation = ",reputation

        elif prompt_m1 == "backpack":
            print backpack
            prompt_meadow1()

        elif prompt_m1 == "belt pouch":
            print belt_pouch
            prompt_meadow1()

        elif prompt_m1 == "equipment":
            print equipment
            prompt_meadow1()

###############################################################################################

        elif prompt_m1 == "examine fog":
            print "The fog seems natural enough for this time of year."
            print
            prompt_meadow1()

        elif prompt_m1 == "examine grass":
            print '''The grass would be a golden brown in the light
however now it's just
gray and damp.'''
            print
            prompt_meadow1()

        elif prompt_m1 == "look":
            meadow1_desc()

###############################################################################################

        elif prompt_m1 == "s":
            #if day = False
                print "The town's wooden wall is in your way"
                print
                prompt_meadow1()
            #elif
            #    town_1

        elif prompt_m1 == "w":
            edge_forest1()

        elif prompt_m1 == "e":
            outside_1()

        elif prompt_m1 == "n":
            n_meadow_1()

################################################################################################

        elif prompt_m1 == "haggle":
            print "There is no one to haggle with here."
            promt_meadow1()

        elif prompt_m1 == "stealth":
            print "You try and be stealthy"
            prompt_meadow1()

        elif prompt_m1 == "forage":
            if getGrass_m1 == 0:
                print "You find some blades of grass and gather them up."
                backpack['mdw_grass']
                backpack['mdw_grass'] = 1
                print backpack
                getGrass == 1
                prompt_meadow1()
            elif getGrass_m1 == 1:
                print "Someone has gathered the grass already."
                print
                prompt_meadow1()


        else:
            print "Please choose another command. That command is invalid"
            print
            prompt_meadow1()

    except ValueError:
        print "Please choose another command. That command is invalid"
        print
        prompt_meadow1()


start()
outside1()


-- 
Quis hic locus, quae regio, quae mundi plaga. Ubi sum. Sub ortu solis
an sub cardine glacialis ursae.


From Leo.Kislov at gmail.com  Fri Nov 17 06:05:43 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 17 Nov 2006 03:05:43 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
Message-ID: <1163761543.435447.193030@j44g2000cwa.googlegroups.com>


gabor wrote:
> Martin v. L?wis wrote:
> > gabor schrieb:
> >> i also recommend this approach.
> >>
> >> also, raising an exception goes well with the principle of the least
> >> surprise imho.
> >
> > Are you saying you wouldn't have been surprised if that had been
> > the behavior?
>
>
> yes, i would not have been surprised. because it's kind-of expected when
> dealing with input, that malformed input raises an unicode-exception.
> and i would also expect, that if os.listdir completed without raising an
> exception, then the returned data is correct.

The problem is that most programmers just don't want to deal with
filesystem garbage but they won't be happy if the program breaks
either.

> > How would you deal with that exception in your code?
>
> depends on the application. in the one where it happened i would just
> display an error message, and tell the admins to check the
> filesystem-encoding.
>
> (in other ones, where it's not critical to get the correct name, i would
> probably just convert the text to unicode using the "replace" behavior)
>
> what about using flags similar to how unicode() works? strict, ignore,
> replace and maybe keep-as-bytestring.
>
> like:
> os.listdir(dirname,'strict')

That's actually an interesting idea. The error handling modes could be:
'mix' -- current behaviour, 'ignore' -- drop names that cannot be
decoded, 'separate' -- see my other message. 

  -- Leo



From deets at nospam.web.de  Thu Nov 16 07:28:01 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Nov 2006 13:28:01 +0100
Subject: pyj file extension
References: <mailman.250.1163678962.32031.python-list@python.org>
Message-ID: <4s33qhFt1kjcU1@mid.uni-berlin.de>

bituman wrote:

> I have two questions for the list:
> - what extension is pyj ?

AFAIK custom to some game that uses python - but I guess you already know
that.....

> - is there a good python debugger that can inspect precompiled python
> files?

You can decompyle them:

http://www.crazy-compilers.com/decompyle/

But only up to python 2.3. No idea if that is sufficient & if there is
anything newer out there.

diez


From inq1ltd at verizon.net  Thu Nov 30 21:14:16 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 30 Nov 2006 21:14:16 -0500
Subject: shtoom making PC2Phone calls
In-Reply-To: <200611302107.30586.inq1ltd@verizon.net>
References: <1164908118.401178.201670@80g2000cwy.googlegroups.com>
	<200611302107.30586.inq1ltd@verizon.net>
Message-ID: <200611302114.16922.inq1ltd@verizon.net>



Forgot to include, 
Check out pyserial-2-2 at sourceforge.net/
by Chris Liechti




On Thursday 30 November 2006 21:07, jim-on-linux 
wrote:
> On Thursday 30 November 2006 12:35, Croteam 
wrote:
> > Hello,
> >
> > Can somebody give me shtoom examples or
> > source code for making PC2Phone calls and pc
> > to pc calls. (if you give me source
> > code,please give me full url to that source
> > or send me to email: vedran at v-programs.com)
> >
> >                            Thanks,I will
> > really appreciate that
>
> Try,
> http://pyserial.sourceforge.net/
>
> Many examples. I've used some of the examples
> to connect pc to pc. And with phone attached,
> you can to talk with someone on the other end.
>
> Search using serial port.
>
>
> jim-on-linux
> http://www.inqvista.com


From gagsl-py at yahoo.com.ar  Wed Nov 15 19:35:11 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 15 Nov 2006 21:35:11 -0300
Subject: pyRTF and Footers
In-Reply-To: <1163635301.052084.93340@b28g2000cwb.googlegroups.com>
References: <1163632090.351315.19480@h48g2000cwc.googlegroups.com>
	<mailman.214.1163634758.32031.python-list@python.org>
	<1163635301.052084.93340@b28g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061115212049.06173f90@yahoo.com.ar>

At Wednesday 15/11/2006 21:01, E.Doxtator at gmail.com wrote:

> > >I've been using the pyRTF module to generate some documents that I need
> > >for work.  In general, the module is good, and pretty simple to use.
> > >However, I am running into a problem with footers that doesn't quite
> > >make sense to me.
>
> > So a better place to ask  would be... well, it appears there is 
> no better place except asking
> > the author directly :)
>
>Anyone got his number?

You could try the address listed in the docs...
I'm trying the examples and Example7 appears to be what you want.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From rcmn73 at gmail.com  Mon Nov  6 17:34:08 2006
From: rcmn73 at gmail.com (rcmn)
Date: 6 Nov 2006 14:34:08 -0800
Subject: python-ldap/win32 or python/ldap/win32
Message-ID: <1162852448.012799.208740@b28g2000cwb.googlegroups.com>

i'm running around in circle trying to to use python/ldap/ on
win32(WinXP). I want to write a script that read SQL data(no pbm) and
insert member in a AD group(pbm).I used the module
Active_Directory(very easy to use).but it read only AD.
So i have been try to install python-ldap on a win32/python2.4
install.But each time i try

------------------------
setup.py build
------------------------
i get

---------------------------------------------------------------------------------------------------------------------------------
....
running build_ext
error: The .NET Framework SDK needs to be installed before building
extensions for Python.
----------------------------------------------------------------------------------------------------------------------------------
of course i insalled .NET ,and it keeped doing it, google around found
some registry key thing that have to be changed.tried that but still
nothing.I have been looking around more but the informations i find on
that topic seems so clunky and out dated(2004-2003) that i really don't
think i should wast my time any further without asking around if i'm
going the right direction.Because i have the feeling Python/Ldap/win32
shouldn't be such a problem to use...And if it isn't then...Python is
not the language i need to accomplish that task.



From ptmcg at austin.rr.com  Thu Nov 16 11:25:52 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Nov 2006 08:25:52 -0800
Subject: HTML Parsing and Indexing
In-Reply-To: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
References: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
Message-ID: <1163694352.352186.256570@f16g2000cwb.googlegroups.com>

On Nov 13, 1:12 pm, mailtog... at gmail.com wrote:
>
> I need a help on HTML parser.
>
<snip>
>
> I saw a couple of python parsers like pyparsing, yappy, yapps, etc but
> they havn't given any example for HTML parsing.

Geez, how hard did you look?  pyparsing's wiki menu includes an
'Examples' link, which take you to a page of examples including 3
having to do with scraping HTML.  You can view the examples right in
the wiki, without even having to download the package (of course, you
*would* have to download to actually run the examples).

-- Paul



From gheorghe.postelnicu at gmail.com  Wed Nov  8 14:54:53 2006
From: gheorghe.postelnicu at gmail.com (Gheorghe Postelnicu)
Date: Wed, 8 Nov 2006 14:54:53 -0500
Subject: tkFileDialog
Message-ID: <8094b1b60611081154g12d3d26et2eb59137226d56e2@mail.gmail.com>

In our example, try replacing the last line with

print file.name

---------- Forwarded message ----------
From: cdroulers at hotmail.com
To: python-list at python.org
Date: 8 Nov 2006 11:01:08 -0800
Subject: Problem getting a file pathname with tkFileDialog
Hello,
I am working on a school project that requires me to get the path of a
filename for future treatment.
I've tried getting a file with tkFileDialog.askopenfile.


********************************************
import tkFileDialog
file = tkFileDialog.askopenfile()
print file
********************************************


It prints the opened files stuff, but I just can not find how to get
that path as a string. I've searched around google and the present
group, and found no documentation on the file class used with
tkFileDialog. Does someone have a solution for that?

Thank you

Christian




-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School


From chris at kateandchris.net  Wed Nov 15 11:41:45 2006
From: chris at kateandchris.net (Chris Lambacher)
Date: Wed, 15 Nov 2006 11:41:45 -0500
Subject: plasTeX doesn't load LaTeX packages
In-Reply-To: <20061111122330.4969.qmail@web27208.mail.ukl.yahoo.com>
References: <20061111122330.4969.qmail@web27208.mail.ukl.yahoo.com>
Message-ID: <20061115164145.GB5758@kateandchris.net>

On Sat, Nov 11, 2006 at 01:23:30PM +0100, giovanni gherdovich wrote:
> Hello,
> 
> first of all:
> Is this the right place to ask plastek-related
> questions?
I would suspect that the plastex-users mailing list would be the right forum
for plasTeX related questions:
http://sourceforge.net/mail/?group_id=120835

There however only appears to be one message in the archives.  Perhaps there
is not yet much of user community.

-Chris


From robert.kern at gmail.com  Sun Nov 12 18:10:18 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 12 Nov 2006 17:10:18 -0600
Subject: numpy/scipy: correlation
In-Reply-To: <ej7cft$8de$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net>
Message-ID: <ej89l3$nvb$1@sea.gmane.org>

robert wrote:

> I remember once I saw somewhere a formula for an error range of the corrcoef. but cannot find it anymore. 

There is no such thing as "a formula for an error range" in a vacuum like that.
Each formula has a model attached to it. If your data does not follow that
model, then any such estimate of the error of your estimate is meaningless.

sturlamolden pointed out to me that I was wrong in thinking that the correlation
coefficient was meaningless in the linear regression case. However, the error
estimate that is used for bivariate normal correlation coefficients will almost
certainly not apply to "correlation coefficient qua sqare root of the fraction
of y's variance explained by the linear model". In that context, the
"correlation coefficient" is not an estimate of some parameter. It has no
uncertainty attached to it.

> http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient#Trivia
> says:
>   In MATLAB, corr(X) calculates Pearsons correlation coefficient along with p-value.
> 
> Does anybody know how this prob.-value is computed/motivated? Such thing would be very helpful for numpy/scipy too.

scipy.stats.pearsonr()

As with all such frequentist hypothesis testing nonsense, one takes the null
hypothesis (in this case, a bivariate normal distribution of points with 0
correlation), finds the distribution of the test statistic given the number of
points sampled, and then finds the probability of getting a test statistic "at
least as extreme" as the test statistic you actually got.

> my old func is simply hands-on based on 
> n,sum_x,sum_y,sum_xy,sum_xx,sum_yy=len(vx),vx.sum(),vy.sum(),(vx*vy).sum(),(vx*vx).sum(),(vy*vy).sum()
> Guess its already fast for large data?

You really want to use a 2-pass algorithm to avoid numerical problems.

> Note: numpy.corrcoef strikes on 2 points:
>>>> numpy.corrcoef(([1,2],[1,2]))
> array([[          -1.#IND,           -1.#IND],
>        [          -1.#IND,           -1.#IND]])

This was fixed in SVN.

> PPS:
> 
> A compatible scipy binary (0.5.2?) for numpy 1.0 was announced some weeks back. Think currently many users suffer when trying to get started with incompatible most-recent libs of scipy and numpy.

Well, go ahead and poke the people that said they would have a Windows binary
ready. Or provide one yourself.

-- 
Robert Kern

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



From pavlovevidence at gmail.com  Mon Nov 13 20:00:41 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Nov 2006 17:00:41 -0800
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
	<1163353941.3497.45.camel@localhost.localdomain>
	<4558BE80.9010909@hobbshouse.org>
	<mailman.104.1163454913.32031.python-list@python.org>
Message-ID: <1163466041.196606.254700@i42g2000cwa.googlegroups.com>

Steve Holden wrote:
> In fact most Python doesn't use such constructs, though I'll admit the
> occasional __init__ is more or less inevitable once you start using the
> object-oriented features more than casually.

Occasional?  I don't know about you, but I use __init__ in 99% of the
classes I define.  :)  I don't think __special_symbols__ are manifestly
unsuitable for newbies--they're just special.

I was curious how much I used these symbols.  For my current largish
project:

    306 __init__
     68 __future__
     44 __dict__
      3 __name__
      3 __main__
      3 __import__
      3 __builtin__
      2 __str__
      2 __file__
      1 __setitem__
      1 __setattr__
      1 __repr__
      1 __or__
      1 __ne__
      1 __int__
      1 __getitem__
      1 __getattribute__
      1 __eq__
      1 __call__
      1 __add__

Excepting my use of __dict__, not a whole lot advanced usage there, and
I am NOT the kind of person who's afraid to do advanced things when
it's useful.  Much of the advanced stuff, including __dict__, is for
debugging.  (I have a lot of classes that acquire resources that I must
explicity release, so I clear the __dict__ to catch any post-release
accesses, which could cause subtle failures otherwise.)


Carl Banks



From gagsl-py at yahoo.com.ar  Fri Nov 24 22:49:23 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 25 Nov 2006 00:49:23 -0300
Subject: Using SimpleXMLRPCServer in a Windows Service
In-Reply-To: <60987dac0611230152r4af42ce6mfbbaf5a4409537ee@mail.gmail.co
 m>
References: <60987dac0611230152r4af42ce6mfbbaf5a4409537ee@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061125003821.034c9810@yahoo.com.ar>

At Thursday 23/11/2006 06:52, Rudy Schockaert wrote:

>After some Googling I found a post of someone who wanted to do exactly
>as what I want to do now.
>There is however a problem in his code that makes the service fails
>after the first connection. I slightly modified his code and now I can
>run the service longer before I run into trouble.
>I then tried making the SimpleXMLRPCServer multi-threaded, hoping the
>problem would disappear, but no avail.
>The code is as follows:
>The commented part in the while loop is from the original code.

The original (commented-out) code should be fine. You have to wait 
for 2 events: the service stop signal, or an incoming connection.
Anyway, you always have to catch exceptions; override handle_error at least.

Another approach (not involving events) would be to set a (not so 
big) timeout on the socket, and test for self.stop_requested on each iteration.

>         server = ThreadedSimpleXMLRPCServer(("", 8080))
>         object = OBJECT()
>         server.register_instance(object)
>         self.socket = server.socket
>
>         while 1:
>             #win32file.WSAEventSelect(server,
>self.hSockEvent,win32file.FD_ACCEPT)
>             #rc =
>win32event.WaitForMultipleObjects((self.hWaitStop,self.hSockEvent), 0,
>win32event.INFINITE)
>             #if rc == win32event.WAIT_OBJECT_0:
>             #    break
>             #else:
>             #    server.handle_request()
>             #    win32file.WSAEventSelect(server,self.hSockEvent, 0)
>             #    #server.serve_forever()  ## Works, but breaks the


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From lardissone at gmail.com  Wed Nov 29 11:25:35 2006
From: lardissone at gmail.com (Leandro Ardissone)
Date: 29 Nov 2006 08:25:35 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <12mragv4f1jhfb4@corp.supernews.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
Message-ID: <1164817535.636391.294310@n67g2000cwd.googlegroups.com>

great, thanks

And how I can compare this "<type 'str'>" output ?
I want to decide what to do if the var is an string and what to do if
not..

Tried with:
if type(artistList) == "<type 'list'>":

and
if type(artistList) == "list":

but nothing..

On Nov 29, 12:41 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2006-11-29, Leandro Ardissone <lardiss... at gmail.com> wrote:
>
>
>
> > I want to know what type is a variable. For example, I get the
> > contents of an xml but some content is a list or a string, and
> > I need to know what type it is.
> >>> x = 'asdf'
> >>> type(x)
> <type 'str'>
> >>> i = 0
> >>> type(i)
> <type 'int'>--
> Grant Edwards                   grante             Yow!  I Know A Joke!!
>                                   at
>                                visi.com



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov  9 08:19:47 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 10 Nov 2006 00:19:47 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
	<mailman.1948.1163035654.11739.python-list@python.org>
	<pan.2006.11.09.09.37.52.910073@REMOVE.THIS.cybersource.com.au>
	<slrnel614m.8b8.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.11.09.13.19.46.794053@REMOVE.THIS.cybersource.com.au>

On Thu, 09 Nov 2006 10:36:07 +0000, Antoon Pardon wrote:

> On 2006-11-09, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>> On Thu, 09 Nov 2006 12:27:12 +1100, Ben Finney wrote:
>>
>>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>>> 
>>>> Ben Finney wrote:
>>>> > If you pass a *mapping* of the
>>>> > "I-might-want-to-add-more-in-the-future" values, then you get both
>>>> > explicit *and* expandable, without an arbitrary unneeded sequence.
>>>>
>>>> Do you mean by using the **kwargs parameter?
>>> 
>>> No. 
>>
>> Well, that'll teach me to put words in your mouth.
>>
>> [snip]
>>> If you have a group of named, semantically-related, unsequenced values,
>>> pass them into the function as a mapping object (a dict object).
>>
>> Still, if you are doing this:
>>
>> mapping_object = {"strength": roll_dice(10),
>>     "intelligence":roll_dice(10),
>>     "dexterity":roll_dice(10)}
>> my_character = Character(mapping_object)
>>
>> then there is little benefit to building the dict just for the purposes of
>> passing it to Character(), never to use it again, not when you can do this:
>>
>> my_character = Character(strength: roll_dice(10), 
>>     intelligence:roll_dice(10), dexterity:roll_dice(10))
> 
> But you will have to adapt this if you want extra or different
> characteristics.

Sure, but only in one place:

# now have charisma
my_character = Character(strength=roll_dice(8), 
    intelligence=roll_dice(12), dexterity=roll_dice(20),
    charisma=roll_dice(6))

If all the char attributes are initialised with the same function, it
may make sense to set them in a loop, as you do below. But if they are all
calculated differently, as above, then you lose the benefit of a loop.

> Personnally I would prefer something like:
> 
>   chardict = {}
>   for char in characteristics:
>     chardict[char] = roll_dice(10)
> 
>   my_character = Character(chardict)
> 
> This way you only have to keep your characteristics in one place.

As I do.

Remember, the prerequisite for my suggestion to make sense is that, once
you've created your initial character attributes and stuck them in a dict,
you never use the dict again. Also, I'm assuming the constraint that there
is a manageably small number of character attributes.


>> If you happen to already have collected your character attributes in a
>> mapping object for some other reason, then well and good, pass it into the
>> function. Otherwise, well, I believe the correct container for
>> character attributes is a Character, not a dict.
> 
> What is wrong with keeping the character attributes in a dict in the
> Character?

For the same reason we typically say object.attribute rather than
object.__dict__[attribute]

Perhaps you missed the original post, where one of the constraints was
that character attributes in the game were also object attributes. E.g.

class Character(object):
    def __init__(self, strength):
        self.strength = strength

The question posed was, what is the best way of calling __init__ with
values for those character attributes?

If the character attributes vary at runtime, or there are many of them, or
if they are needed together (rather than individually) in multiple places
apart from Character.__init__, then it makes sense to bundle them up in a
dict and pass the dict around, like Ben and now you are suggesting.

But if the character attributes are not varying, and there are only a few,
and they only get used collectively for Character.__init__, then I don't
believe there is any advantage to putting them in a dict to be used once
and then tossed away.

To give an analogy, if you are writing a coordinate class, you would
likely do something like this:

class Coord(object):
    def __init__(self, x, y):
        self.x = x
        self.y = y

If you had a lot of dimensions, you'd change your entire model:

class Coord(object):
    def __init__(self, alist):
        self.coordinates = alist

But it is unlikely that a tactic like this would be worth the extra work:


class Coord(object):
    def __init__(self, mapping_object):
        # check that mapping_object has the right keys
        expected = ['x', 'y']
        for key in expected:
            if key not in mapping_object.keys(): raise KeyError
        # do something with mapping_object
        self.__dict__.update(mapping_object)

mapping = {'x': some_value, 'y': some_value}
point = Coord(mapping)
del mapping # never use it again after construction


-- 
Steven.



From martin at v.loewis.de  Sun Nov 19 18:54:08 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Mon, 20 Nov 2006 00:54:08 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <6d301$4560e775$59ad1aca$15362@news.flashnewsgroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<6d301$4560e775$59ad1aca$15362@news.flashnewsgroups.com>
Message-ID: <4560EEA0.50900@v.loewis.de>

gabor schrieb:
>> I may have missed something, but did you present a solution that would
>> make the case above work?
> 
> if we use the same decoding flags as binary-string.decode(),
> then we could do:
> 
> [os.path.join(path,n) for n in os.listdir(path,'ignore')]

That wouldn't work. The characters in the file name that didn't
decode would be dropped, so the resulting file names would be
invalid. Trying to do os.stat() on such a file name would raise
an exception that the file doesn't exist.

> [os.path.join(path,n) for n in os.listdir(path,'replace')]

Likewise. The characters would get replaced with REPLACEMENT
CHARACTER; passing that to os.stat would give an encoding
error.

> it's not an elegant solution, but it would solve i think most of the
> problems.

No, it wouldn't. This idea is as bad or worse than just dropping
these file names from the directory listing.

>> One approach I had been considering is to always make the decoding
>> succeed, by using the private-use-area of Unicode to represent bytes
>> that don't decode correctly.
>>
> 
> hmm..an interesting idea..
> 
> and what happens with such texts, when they are encoded into let's say
> utf-8? are the in-private-use-area characters ignored?

UTF-8 supports encoding of all Unicode characters, including the PUA
blocks.

py> u"\ue020".encode("utf-8")
'\xee\x80\xa0'

Regards,
Martin


From torriem at chem.byu.edu  Thu Nov 30 23:19:12 2006
From: torriem at chem.byu.edu (Michael Torrie)
Date: Thu, 30 Nov 2006 21:19:12 -0700
Subject: Why are slice indices the way they are in python?
In-Reply-To: <1164905936.794174.299200@l12g2000cwl.googlegroups.com>
References: <1164860915.349821.309920@14g2000cws.googlegroups.com>
	<1164905936.794174.299200@l12g2000cwl.googlegroups.com>
Message-ID: <1164946752.12347.0.camel@enterprise>

On Thu, 2006-11-30 at 08:58 -0800, ogbash at gmail.com wrote:
> And if talking about dates, then I suggest NEVER use 2006-12-31
> 23:59:59 in data, always 2007-01-01 00:00:00 instead. 

Forgive me for my ignorance, but isn't "2006-12-31 23:59:59" actually
one entire second earlier than "2007-01-01 00:00:00"?  Hence they are
two different dates are they not?

Michael




From nepbabu.cx at gmail.com  Mon Nov 27 20:06:21 2006
From: nepbabu.cx at gmail.com (nepBabu.cx)
Date: Tue, 28 Nov 2006 11:36:21 +1030
Subject: Python script and C++
In-Reply-To: <456b83c7$1@clarion.carno.net.au>
References: <456b83c7$1@clarion.carno.net.au>
Message-ID: <ekg22g$f5c$1@sea.gmane.org>

Thuan Seah Tan wrote:
> Hi all,
> 
>     I am new to python  and currently I am working on a traffic simulation 
> which I plan to define the various agents using scripting. It's kind of like 
> scripting for non-playable character in games. I am thinking of using python 
> for this but I am concerned with running time. Is scripting a lot slower 
> compared to direct implementation in C++? Does compiling the script help in 

"Learning Python" is a good book to start learning Python. I don't think
you'll be better off in C++. If speed is of utmost importance for the
whole implementation, then I suggest C++ but well coded Python runs
atleast/near to C++ implementation. Otherwise, you can atleast code the
speed-savvy part of the implementation in C++. Ofcourse, Python object
model is based on a virtual machine (called PVM) which accounts for
slower start-up due to native function call conversion but you'll find
that learning curve is only a tiny fraction compared to C++.  And you'll
surely love Python. =)

> any way? Also, can anyone recommend me a book that covers python in general 
> as well as C++ binding? Thanks.

"Progamming in Python" is another excellent book that might be of help.
If you are developing on windows machine then
http://aspn.activestate.com/ASPN/Python has some helpful recipes.

C++ bindings in Python are handled by extending python objects and
manipulating it from C++ codes using the Python headers.

Also, http://python.org/docs should be a good reference.
Also Google for "vaults of parnassus" and Fredrik lundh's guide on Python.

Goodluck!


-- 
thanks,
nepBabu.cx
 	  c c
     .-.,;(")
.'`~C.-.c =W=



From __peter__ at web.de  Wed Nov 22 07:55:44 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 22 Nov 2006 13:55:44 +0100
Subject: text file parsing (awk -> python)
References: <mailman.582.1164195481.32031.python-list@python.org>
Message-ID: <ek1hbd$bac$01$1@news.t-online.com>

Daniel Nogradi wrote:

> I have an awk program that parses a text file which I would like to
> rewrite in python. The text file has multi-line records separated by
> empty lines and each single-line field has two subfields:
> 
> node 10
> x -1
> y 1
> 
> node 11
> x -2
> y 1
> 
> node 12
> x -3
> y 1
> 
> and this I would like to parse into a list of dictionaries like so:
> 
> mydict[0] = { 'node':10, 'x':-1, 'y':1 }
> mydict[1] = { 'node':11, 'x':-2, 'y':1 }
> mydict[2] = { 'node':12, 'x':-3', 'y':1 }
> 
> But the names of the fields (node, x, y) keeps changing from file to
> file, even their number is not fixed, sometimes it is (node, x, y, z).
> 
> What would be the simples way to do this?

data = """node 10
x -1
y 1

node 11
x -2
y 1

node 12
x -3
y 1
"""

def open(filename):
    from cStringIO import StringIO
    return StringIO(data)

converters = dict(
    x=int,
    y=int
)

def name_value(line):
    name, value = line.split(None, 1)
    return name, converters.get(name, str.rstrip)(value)

if __name__ == "__main__":
    from itertools import groupby
    records = []

    for empty, record in groupby(open("records.txt"), key=str.isspace):
        if not empty:
            records.append(dict(name_value(line) for line in record))

    import pprint
    pprint.pprint(records)




From fredrik at pythonware.com  Thu Nov  2 01:34:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 07:34:06 +0100
Subject: CSV module, DictReader problem (bug?)
In-Reply-To: <1162434526.601605.315560@k70g2000cwa.googlegroups.com>
References: <eib0la$86i$1@newslocal.mitre.org>	<1162415232.190913.163240@m73g2000cwd.googlegroups.com>	<jnhik21velubsmmtnsfqqaujd7rronkedd@4ax.com>
	<1162434526.601605.315560@k70g2000cwa.googlegroups.com>
Message-ID: <eic3gt$63u$1@sea.gmane.org>

John Machin wrote:

> Not all APIs do the right thing. If you fire up the cmd.exe shell and
> feed it slashes as path separators, it barfs. Example:
>     C:\junk>dir c:/junk/*.bar
>     Invalid switch - "junk".
> Hence the advice to use rawstrings with backslashes -- they work under
> all circumstances.

we went through this a couple of days ago; all Windows API:s are 
*documented* to accept backward or forward slashes, the command shell is 
*documented* to only accept backward slashes.

if you're wrapping some cmd.exe command in an internal API, it's usually 
easier to call "os.path.normpath" the last thing you do before you call 
"os.system", than to get all the backslashes right in your code.

also see:

http://www.effbot.org/pyfaq/why-can-t-raw-strings-r-strings-end-with-a-backslash.htm

</F>



From martin.witte at gmail.com  Tue Nov 21 15:24:33 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 21 Nov 2006 12:24:33 -0800
Subject: How to sort list
In-Reply-To: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
Message-ID: <1164140673.415574.48900@m73g2000cwd.googlegroups.com>



On Nov 21, 8:15 pm, "Lad" <pyt... at hope.cz> wrote:
> I have a list of emails and I would like to sorted that list by domains
> E.g.
> If the list is
>
> Emails=['... at hotmail.com','... at yahoo.com','... at hotmail.com','... at yahoo.com',....]
>
> after sorting I would like to have
> Emails=['... at hotmail.com','... at hotmail.com','... at yahoo.com','... at yahoo.com',....]
>
> What is the best/easiest way?
>
> Thank you for help
> L.

Another way would be a compare function as callback function in the
sort() method of list:

py>def compare(a, b):
py>    a = a.split('@')[1]
py>    b = b.split('@')[1]
py>    return cmp(a, b)
py>
py>Emails =
['... at hotmail.com','... at yahoo.com','... at hotmail.com','... at yahoo.com']
py>Emails.sort(compare)
py>print Emails
['... at hotmail.com', '... at hotmail.com', '... at yahoo.com', '... at yahoo.com']



From steve at REMOVE.THIS.cybersource.com.au  Wed Nov 15 05:35:43 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 15 Nov 2006 21:35:43 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
	<pan.2006.11.15.07.12.31.716203@REMOVEME.cybersource.com.au>
	<slrnelljim.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <pan.2006.11.15.10.35.41.68874@REMOVE.THIS.cybersource.com.au>

On Wed, 15 Nov 2006 08:22:46 +0000, Antoon Pardon wrote:

>> Redundancy is not something to be valued for its own sake. It is only
>> valuable when it actually gains you something.
> 
> In the same way it is not something to be eliminated for its own
> sake.

On the contrary, redundancy implies more work somewhere: e.g. more work
for the parser, more effort needed by the python-dev crew, bigger
binaries, larger code bases, more complex test suites, slower development,
longer downloads. Whatever the nature of the redundant thing, there will
be a cost to it. If that cost isn't outweighed by some advantage it should
be eliminated merely because it is redundant and therefore a cost we could
do without.

I suppose, theoretically, if you could find some cost-free redundancy,
something that just happened for free, we would have no reason to care
whether it existed or not. But since cost-free redundancies don't exist,
or at least are very rare, we should prefer to remove redundancies UNLESS
they offer some advantage.



-- 
Steven.



From 120psi at gmail.com  Fri Nov 24 10:36:56 2006
From: 120psi at gmail.com (120psi at gmail.com)
Date: 24 Nov 2006 07:36:56 -0800
Subject: Local variables persist in functions?
In-Reply-To: <1164358475.569240.115450@45g2000cws.googlegroups.com>
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
	<1164358475.569240.115450@45g2000cws.googlegroups.com>
Message-ID: <1164382616.443460.147300@f16g2000cwb.googlegroups.com>


John Machin wrote:
> 120psi at gmail.com wrote:
> > I'm a bit baffled.  Here is a bit of fairly straightforward code:
> >
> > def _chunkify( l, chunkSize, _curList = list() ):
>
> Quite apart from the default argument problem, which Duncan has
> addressed, you have some problems with style and variable names. In
> particular: give variables meaningful names ; "L".lower() is not
> meaningful and also suffers from confusion with the digit 1 in some
> fonts. There is no necessity for the _ in _curList in the above line.
>
> Please consider reading http://www.python.org/dev/peps/pep-0008/
>
> >     print _curList   # yay for printf debugging
> >     if len( l ) <= chunkSize:
> >         _curList.append( l )
> >     else:
> >         newChunk = l[:chunkSize]
> >         _curList.append( newChunk )
> >         _chunkify( l[chunkSize:], chunkSize, _curList )
> >     return _curList
> >
> > _chunkify simply breaks a sequence into a sequence of smaller lists of
> > size <= chunkSize.  The first call works fine, but if I call it
> > multiple times, weirdness happens.
> >
> > chunks = _chunkify( list, size )   # _curList keeps its previous value!
> > chunks = _chunkify( list, size, list() )    # this works as expected
>
> Is the first "list" a list, or is it the name of the same function that
> you are calling to provide the 3rd argument?
>
> [snip]
>
> HTH,
> John

> Please consider reading http://www.python.org/dev/peps/pep-0008/
Done.  Veru useful, thank you.  Even though it's not the most correct
way or using the leading _, I was using it to sort of say 'don't set
this when calling', and yes--"L" is a bad name for a list, and I
probably should have used something else (even if this code is more of
a one-off than anything else).

Anyhow, thanks.



From levub137 at wi.rr.com  Sun Nov 19 12:46:59 2006
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sun, 19 Nov 2006 17:46:59 GMT
Subject: [ANN] ratfun-2.4  Polynomials and Rational Functions
Message-ID: <nM08h.18974$fh.6040@tornado.rdc-kc.rr.com>

The ratfun module provides classes for defining polynomial and rational
function (ratio of two polynomials) objects. These objects can be used
in arithmetic expressions and evaluated at a particular point.

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

Note: If you are using rpncalc-1.2 or later, this module is already
included.  This release is for folks who don't want rpncalc.

Changes in 2.4

* Updated the included clnum package.

* Added uniqueRoots to handle polynomials with multiple roots.


From sturlamolden at yahoo.no  Sun Nov 19 12:18:09 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 19 Nov 2006 09:18:09 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163711343.870829.110030@h48g2000cwc.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <1163956689.091059.319400@b28g2000cwb.googlegroups.com>


sturlamolden wrote:

> def D4_Transform(x, s1=None, d1=None, d2=None):
>    """
>    D4 Wavelet transform in NumPy
>    (C) Sturla Molden
>    """
>    C1 = 1.7320508075688772
>    C2 = 0.4330127018922193
>    C3 = -0.066987298107780702
>    C4 = 0.51763809020504137
>    C5 = 1.9318516525781364
>    if d1 == None:
>       d1 = numpy.zeros(x.size/2)
>       s1 = numpy.zeros(x.size/2)
>       d2 = numpy.zeros(x.size/2)
>    odd = x[1::2]
>    even = x[:-1:2]
>    d1[:] = odd[:] - C1*even[:]
>    s1[0] = even[0] + C2*d1[0] + C3*d1[-1]       #typ0
>    s1[1:] = even[1:] + C2*d1[1:] + C3*d1[:-1]   #typo
>    d2[0] = d1[0] + s1[-1]
>    d2[1:] = d1[1:] + s1[:-1]
>    even[:] = C4 * s1[:]
>    odd[:] = C5 * d2[:]
>    if x.size > 2:
>    D4_Transform(even,s1[0:even.size/2],
>            d1[0:even.size/2],d2[0:even.size/2])


Actually, there was a typo in the original code. I used d1[l-1] where I
should have used d1[l+1]. Arrgh. Here is the corrected version, the
Matlab code must be changed similarly. It has no relevance for the
performance timings though.




def D4_Transform(x, s1=None, d1=None, d2=None):
    """
    D4 Wavelet transform in NumPy
    (C) Sturla Molden
    """
    C1 = 1.7320508075688772
    C2 = 0.4330127018922193
    C3 = -0.066987298107780702
    C4 = 0.51763809020504137
    C5 = 1.9318516525781364
    if d1 == None:
       d1 = numpy.zeros(x.size/2)
       s1 = numpy.zeros(x.size/2)
       d2 = numpy.zeros(x.size/2)
    odd = x[1::2]
    even = x[:-1:2]
    d1[:] = odd[:] - C1*even[:]
    s1[:-1] = even[:-1] + C2*d1[:-1] + C3*d1[1:]
    s1[-1] = even[-1] + C2*d1[-1] + C3*d1[0]
    d2[0] = d1[0] + s1[-1]
    d2[1:] = d1[1:] + s1[:-1]
    even[:] = C4 * s1[:]
    odd[:] = C5 * d2[:]
    if x.size > 2:
    D4_Transform(even,s1[0:even.size/2],
            d1[0:even.size/2],d2[0:even.size/2])



From Eric_Dexter at msn.com  Tue Nov 28 21:23:59 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 28 Nov 2006 18:23:59 -0800
Subject: Error handling. Python embedded into a C++ app.
In-Reply-To: <0eoom290nb1m69n36gr97dsm0bn74ora5o@4ax.com>
References: <0eoom290nb1m69n36gr97dsm0bn74ora5o@4ax.com>
Message-ID: <1164767039.835715.162980@l12g2000cwl.googlegroups.com>

You would use try: and then on the next line except:  I am not sure
what the best answer is but you could write your errors to a file and
then load them if all else fails.

https://sourceforge.net/projects/dex-tracker



Wolfram wrote:
> I have a problem with displaying errors in an embedded situation.
>
> The "main program" I want to embed Python into is a windows, MFC,
> non-console, C++ application. My issue is that I have not been able to
> "catch" error messages from python, for example syntax errors.
>
> PyRun_SimpleFile() crashed, probably due to incompatible FILE
> structures. So I am using PyRun_SimpleString to call the python
> "execute" command to execute a *.py file. As a test for stdout I can
> do a "print" in the *.py and I test stderr using an on-purpose name
> error.
>
>
> Here is what I tried:
>
> - Use AllocConsole and
> 	freopen("CON", "w", stdout);
>   freopen("CON", "w", stderr);
> to redirect stderr and stdout to a new console window.
> The C++ stderr/stdout is successfully redirected before I start python
> with  Py_Initialize(), but Python does not output into it at all. In
> case it is a "not flushed yet" issue, I even added a Py_Finalize()
> afetr executing the *.py file.
> - I used a TKInter based solution found on the net
> - I reopened stderr and stdout in C++ to a file. It always stays at 0
> bytes.
> - I tried to reset stderr in the python code (sorry, forgot details).
>
> What is the best way to access Python error messages?
> I prefer a C++ to a python way as I currently can debug C++ but not
> python.
> Is there one way I can use to "catch" exceptions, "runtime errors" and
> "syntax errors" in case there is a difference between them? Sorry for
> the newbie questions but neither a look into my Python-book nor onto
> google helped.
> 
> Bye bye,
> Wolfram Kuss.



From fredrik at pythonware.com  Wed Nov  1 16:49:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 22:49:35 +0100
Subject: jyton usage in a python program
In-Reply-To: <200611012340.21801.comp.ogz@gmail.com>
References: <200611012340.21801.comp.ogz@gmail.com>
Message-ID: <eib4pe$og2$2@sea.gmane.org>

O?uz Yar?mtepe wrote:

> Hi all. I am planning to develop an application using Python. I will need to
> use Zemberek libraries that are written with Java. I know i can use Java
> libraries with the help of Jython. I will write my software by Python and
> will use some modules inside it. But i will need to use that Java libraries
> also inside my Python program. I don't know how! I will need to import that
> libraries and use some of their methods and check the return values during
> the flow of the python program. How can i write jython codes inside my Python
> program?

     http://sourceforge.net/projects/jpype

</F>



From chrisBrat at gmail.com  Tue Nov 21 06:05:32 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 21 Nov 2006 03:05:32 -0800
Subject: class method vs static method
In-Reply-To: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
References: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
Message-ID: <1164107132.655091.176400@h48g2000cwc.googlegroups.com>

Thanks for the responses - things are clearer now.



From irmen.NOSPAM at xs4all.nl  Sat Nov 25 10:50:17 2006
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 25 Nov 2006 16:50:17 +0100
Subject: Dynamic function execution
In-Reply-To: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
References: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
Message-ID: <4568663c$0$329$e4fe514c@news.xs4all.nl>

Andy Wu wrote:
> Say I have a string 'minutes' and a integer 30, now I need to call the
> func this way: func(minutes = 30), how do I do this?

d={"minutes": 30}
func(**d)

This is "extended call syntax". You can read more about this when
you look up the (deprecated) "apply" function in the manual.

--Irmen


From Thomas.Ploch at gmx.net  Sun Nov 19 09:50:14 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Sun, 19 Nov 2006 15:50:14 +0100
Subject: failure building python 2.5 on mac os x 10.3.9
Message-ID: <45606F26.3000602@gmx.net>

Hello,

I followed the instructions in the Mac/README file.

I ran ./configure --enable-framework

But when I try to build from source with gcc 4.0.2, following happens:


[snip]
libtool: can't locate file for: -lSystemStubs
libtool: file: -lSystemStubs is not an object file (not allowed in a
library)
make: *** [Python.framework/Versions/2.5/Python] Error 1

What does that mean?

Thanks,
Thomas


From bj_666 at gmx.net  Fri Nov 17 03:38:18 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 17 Nov 2006 09:38:18 +0100
Subject: C extensions and memory leakage
References: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.11.17.08.38.17.567889@gmx.net>

In <1163749907.941949.201880 at h48g2000cwc.googlegroups.com>, Sheldon wrote:

> Now I am wondering if the problem is in Python and the wrapper? Does
> anybody have any idea or experience with this? I am running on
> Mandrake10 using python 2.3. I am not exactly sure which C wrapper I am
> using as I have copied it from another person.

What do you mean by "C wrapper"?  You know that Python uses reference
counters to manage memory and that you are responsible for these counters
if you are dealing with Python objects in your C extension?

Ciao,
	Marc 'BlackJack' Rintsch


From tleeuwenburg at gmail.com  Tue Nov 21 19:41:33 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 21 Nov 2006 16:41:33 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164106267.882164.124670@h48g2000cwc.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
Message-ID: <1164156093.359433.315790@e3g2000cwe.googlegroups.com>

Thanks for the comments. PDF is, to some extent, a requirement. To
preserve the entire journal as a single "entity" with a reasonably high
production quality, there seems to be no way around it. I could not
find a sufficiently simple way to do multi-format publishing with an
attractive layout and good typesetting.

As for the online archives, a number of journal achives will contain
the journal, so hopefully Google will pick those up. However, I take
your point about searching. Having the archives appear under
"pythonpapers.org" would mean that the search results would return a
consistent location, which is probably a good thing.

I will be exploring further options on this front as they are
suggested. I intend to keep PDF as the "primary" format at this stage,
although there is nothing preventing us from pursuing other options
also.

We will also be looking for collaborators and link exchanges to boost
quality and build the community. We would love to help bring together a
people who may be working on individual blogs or websites and perhaps
encourage them to work directly with others. If we can generate enough
high-quality content, I think that is the most important thing.

Convincing people to help up build up might be difficult, but on the
basis that people are currently doing it themselves without assistance,
they might prefer to be given some help in this process -- help in the
form of article editing, an audience, etc.

We have two proposals so far for the next issue, both of high quality,
but it would be great to come out with a bumper issue which would start
grabbing people's attention. Now that we have our ISSN set up, we're a
bona fide journal, but before we start mouthing off, it would be great
to have a more established track record. To do that we need to come up
with a decent shot at our next issue...

Cheers,
-T (Editor-In-Chief)
>
> Congratulations - it looks very professional.
>
> *But*, PDF is an abhorrent format unless you expect people to print it.
>
> Your download system almost certainly guarantees that the content won't
> be indexed by search  engines and so is much less likely t obe found by
> people who will find it interesting and useful.
>
> :-)
>
> Make sure annnouncements make their way onto PlanetPython (if they're
> not already..).
> 
> Fuzzyman
> http://www.voidspace.org.uk/index2.shtml



From bsdforfree at rambler.ru  Tue Nov 21 02:05:28 2006
From: bsdforfree at rambler.ru (Vyacheslav Sotnikov)
Date: Tue, 21 Nov 2006 10:05:28 +0300
Subject: FreeBSD + Python + Oracle
Message-ID: <4562A538.9090900@rambler.ru>

Hello python-list,
is anybody has any success in taking this components live together? I
need to access remote Oracle 9i from freebsd 6.2 machine using python
2.4.4. Thanks in advance for answer.


From fredrik at pythonware.com  Thu Nov  2 15:59:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 21:59:05 +0100
Subject: __doc__ in compiled script
In-Reply-To: <7.0.1.0.0.20061102172803.05831948@softlab.com.ar>
References: <7.0.1.0.0.20061102172803.05831948@softlab.com.ar>
Message-ID: <eidm6p$sdk$1@sea.gmane.org>

Gabriel Genellina wrote:

> I have a script starting with a docstring. After compiling it with 
> compile(), is there any way I could get the docstring? __doc__ on the 
> code object doesn't work.
 >
> I can't use __import__ because the script has top-level statements that 
> have to be executed only once (it's not supposed to be used as a module).

the __doc__ variable is set when you execute the code, so you probably 
have to do something like

from opcode import opmap, HAVE_ARGUMENT, EXTENDED_ARG

globals().update(opmap) # get opcode names

def getdoc(co):
     # get __doc__ attribute for code object
     value = None
     code = map(ord, co.co_code)
     i = 0
     while i < len(code):
         opcode = code[i]
         if opcode == LOAD_CONST:
             oparg = code[i+1] + (code[i+2] << 8)
	    value = co.co_consts[oparg]
         elif opcode == STORE_NAME:
             oparg = code[i+1] + (code[i+2] << 8)
             name = co.co_names[oparg]
	    if name == "__doc__":
		return value
         i += 1
         if opcode >= HAVE_ARGUMENT:
             i += 2

(or you can just look in co.co_consts[0] and hope for the best)

</F>



From fredrik at pythonware.com  Wed Nov 22 02:44:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 08:44:15 +0100
Subject: Is time.time() < time.time() always true?
In-Reply-To: <87bqn0wa7l.fsf@benfinney.id.au>
References: <2773CAC687FD5F4689F526998C7E4E5FF1EBCD@au3010avexu1.global.avaya.com>
	<87bqn0wa7l.fsf@benfinney.id.au>
Message-ID: <ek0v4e$qh3$2@sea.gmane.org>

Ben Finney wrote:


> Really? Where does Python guarantee that the left side *must* be
> evaluated before the right side of a comparison?

in the language reference:

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

</F>



From kloro2006 at gmail.com  Thu Nov  9 20:16:54 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Thu, 09 Nov 2006 17:16:54 -0800
Subject: object data member dumper?
References: <4550cddd$0$12104$88260bb3@free.teranews.com>	<4550f442$0$20337$426a34cc@news.free.fr>	<mailman.1864.1162938322.11739.python-list@python.org>
	<45510cc9$0$12164$88260bb3@free.teranews.com>
	<mailman.1872.1162953565.11739.python-list@python.org>
Message-ID: <4553c583$0$12165$88260bb3@free.teranews.com>

Steve Holden wrote:

> tom arnall wrote:
>> Steve Holden wrote:
>> 
>> 
>>>Bruno Desthuilliers wrote:
>>>
>>>>tom arnall a ?crit :
>>>>
>>>>
>>>>>does anyone know of a utility to do a recursive dump of object data
>>>>>members?
>>>>>
>>>>
>>>>
>>>>What are "object data members" ? (hint: in Python, everything is an
>>>>object - even functions and methods).
>>>>
>>>>What is your real use case ?
>>>
>>>Basically it sounds like the OP wants to see the attribute values for an
>>>object (and those objects' attribute values, ...). Presumably the
>>>recursive descent could be stopped at the built-in types.
>> 
>> 
>> Yes, exactly. But what is 'OP'?
>> 
> "original poster" (you)
>> 
>>>I'm not familiar with any such thing.
>> 
>> 
>> I'm amazed that there is no way to easily look at the fundamental data
>> structures of a python program. I'm new to python - is there something I
>> don't know about the territory in this regard?
>> 
> Well, new enough to be unaware that Python normally doesn't need such
> drastic measures for debugging. When you are building complex data
> structures such a form of output could get big really quickly. I've
> never come across anything like it in any other language that I have used.

never come across the complexity of data structures or across an object
displayer?

> 
> The most that's usually required is a __repr__() method that dumps the
> values of necessary data attributes.

what about __dict__?


>> 
>>>The code of the standard library's
>>>pprint module might be a good place to start
>> 
>> 
>> I played around with this but it seems more targetted to looking at
>> python objects as opposed to user-defined.
>> 
> It is, but it could be used as a basis for something more to your liking.
>> 
>>>(and the suggested
>>>functionality might make a nice addition if we could work out exactly
>>>what the requirement was).
>> 
>> 
>> I would be glad if people would comment on my example as a step in this
>> direction.
>> 
> I'd suggest you instead consider a mixin object that will add recursive
> data dump functionality to any such classes you require.

have googled a fair amount on 'mixin' but still stumped on it.




-- 
Posted via a free Usenet account from http://www.teranews.com



From toreriks at hotmail.com  Thu Nov 23 05:48:32 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Thu, 23 Nov 2006 10:48:32 +0000 (UTC)
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Message-ID: <Xns9884782092A96toreriknpolarno@129.242.5.222>

Hi,


(len(['']) is 1) == (len(['']) == 1) => True

Is this the case for all numbers? I've tried running the following:

for i in range(10000):
    	for j in range(10000):
		if i != j:
			assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
(i))

which executes fine. Hence, 0-9999 is okey... But this is a relatively 
small range, and sooner or later you probably get two numbers with the same 
id... Thoughts anyone?

Regards Tor Erik

PS: For those of you who don't know: keyword is compares object identities


From steven.bethard at gmail.com  Sun Nov 26 23:47:23 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Mon, 27 Nov 2006 04:47:23 +0000 (GMT)
Subject: python-dev Summary for 2006-10-16 through 2006-10-31
Message-ID: <20061127045230.BCA881E400D@bag.python.org>

python-dev Summary for 2006-10-16 through 2006-10-31
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-10-16_2006-10-31]



=============
Announcements
=============

--------------------------------------
Roundup to replace SourceForge tracker
--------------------------------------

Roundup_ has been named as the official replacement for the SourceForge_ issue tracker. Thanks go out to the new volunteer admins, Paul DuBois, Michael Twomey, Stefan Seefeld, and Erik Forsberg, and also to `Upfront Systems`_ who will be hosting the tracker. If you'd like to provide input on what the new tracker should do, please join the `tracker-discuss mailing list`_.

.. _SourceForge: http://www.sourceforge.net/
.. _Roundup: http://roundup.sourceforge.net/
.. _Upfront Systems: http://www.upfrontsystems.co.za/
.. _tracker-discuss mailing list: http://mail.python.org/mailman/listinfo/tracker-discuss

Contributing threads:

- `PSF Infrastructure has chosen Roundup as the issue tracker for Python development <http://mail.python.org/pipermail/python-dev/2006-October/069528.html>`__
- `Status of new issue tracker <http://mail.python.org/pipermail/python-dev/2006-October/069658.html>`__


=========
Summaries
=========

---------------------------------------------------------------
The buffer protocol and communicating binary format information
---------------------------------------------------------------

Travis E. Oliphant presented a pre-PEP for adding a standard way to describe the shape and intended types of binary-formatted data. It was accompanied by a pre-PEP for extending the buffer protocol to handle such shapes and types. Under the proposal, a new ``datatype`` object would describe binary-formatted data with an API like::

    datatype((float, (3,2))
    # describes a 3*2*8=48 byte block of memory that should be interpreted
    # as 6 doubles laid out as arr[0,0], arr[0,1], ... a[2,0], a[1,2]

    datatype([( ([1,2],'coords'), 'f4', (3,6)), ('address', 'S30')])
    # describes the structure
    #     float coords[3*6]   /* Has [1,2] associated with this field */
    #     char  address[30]

Alexander Belopolsky provided a nice example of why you might want to extend the buffer protocol along these lines. Currently, there's not much you can do with a basic buffer object. If you want to pass it to numpy_, you have to provide the type and shape information yourself::

    >>> b = buffer(array('d', [1,2,3]))
    >>> numpy.ndarray(shape=(3,), dtype=float, buffer=b)
    array([ 1.,  2.,  3.])

By extending the buffer protocol appropriately so that the necessary information can be provided, you should be able to pass the buffer directly to numpy_ and have it understand the format itself::

    >>> numpy.array(b)

People were uncomfortable with the many ``datatype`` variants -- the constructor accepted types, strings, lists or dicts, each of which could specify the structure in a different way. Also, a number of people questioned why the existing ``ctypes`` mechanisms for describing binary data couldn't be used instead, particularly since ``ctypes`` could already describe things like function pointers and recursive types, which the pre-PEP could not. Travis said he was looking for a way to unify the data formats of all the ``array``, ``struct``, ``numpy`` and ``ctypes`` modules, and felt like using the ``ctypes`` approach was too verbose for use in the other modules. In particular, he felt like the ``ctypes`` use of type objects as binary-format specifiers was problematic because type objects were harder to manipulate at the C level.

The discussion continued on into the next fortnight.

.. _numpy:


Contributing threads:

- `PEP: Adding data-type objects to Python <http://mail.python.org/pipermail/python-dev/2006-October/069602.html>`__
- `PEP: Extending the buffer protocol to share array information. <http://mail.python.org/pipermail/python-dev/2006-October/069681.html>`__

------------------------
The "lazy strings" patch
------------------------

Discussion continued on Larry Hastings `lazy strings patch`_ that would have delayed until necessary the evaluation of some string operations, like concatenation and slicing. With his patch, repeated string concatenation could be used instead of the standard ``.join()`` idiom, and slices which were never used would never be rendered. Discussions of the patch showed that people were concerned about memory increases when a small slice of a very large string kept the large string around in memory. People also felt like a stronger motivation was necessary to justify complicating the string representation so much. Larry was pointed to some `code that his patch would break`_, which was using ``ob_sval`` directly instead of calling ``PyString_AS_STRING()`` like it was supposed to. He was also referred to the `Python 3000 list`_ where the recent discussions of `string views`_ would be relevant, and his proposal might have a better chance of acceptance.

.. _lazy strings patch: http://bugs.python.org/1569040
.. _code that his patch would break: http://www.google.com/codesearch?hl=en&lr=&q=ob_sval+-stringobject.%5Bhc%5D&btnG=Search
.. _Python 3000 list: http://mail.python.org/mailman/listinfo/python-3000
.. _string views: http://mail.python.org/pipermail/python-3000/2006-August/003280.html

Contributing threads:

- `PATCH submitted: Speed up + for string Re: PATCH submitted: Speed up + for string concatenation, now as fast as "".join(x) idiom <http://mail.python.org/pipermail/python-dev/2006-October/069459.html>`__
- `Python-Dev Digest, Vol 39, Issue 54 <http://mail.python.org/pipermail/python-dev/2006-October/069468.html>`__
- `Python-Dev Digest, Vol 39, Issue 55 <http://mail.python.org/pipermail/python-dev/2006-October/069485.html>`__
- `The "lazy strings" patch [was: PATCH submitted: Speed up + for string concatenation, now as fast as "".join(x) idiom] <http://mail.python.org/pipermail/python-dev/2006-October/069506.html>`__
- `The "lazy strings" patch <http://mail.python.org/pipermail/python-dev/2006-October/069509.html>`__

--------------
PEP 355 status
--------------

BJorn Lindqvist wanted to wrap up the loose ends of `PEP 355`_ and asked whether the problem was the specific path object of `PEP 355`_ or path objects in general. A number of people felt that some reorganization of the path-related functions could be helpful, but that trying to put everything into a single object was a mistake. Some important requirements for a reorganization of the path-related functions:

* should divide the functions into coherent groups
* should allow you to manipulate paths foreign to your OS

There were a few suggestions of possible new APIs, but no concrete implementations. People seemed hopeful that the issue could be resurrected for Python 3K, but no one appeared to be taking the lead.

.. _PEP 355: http://www.python.org/dev/peps/pep-0355/

Contributing thread:

- `PEP 355 status <http://mail.python.org/pipermail/python-dev/2006-October/069570.html>`__

--------------------------------------------------
Buildbots, configure changes and extension modules
--------------------------------------------------

Grig Gheorghiu, who's been taking care of the `Python Community Buildbots`_, noticed that the buildbots started failing after a checkin that made changes to ``configure``. Martin v. Lowis explained that even though a plain ``make`` will trigger a re-run of ``configure`` if it has changed, there is an issue with distutils not rebuilding when header files change, and so extension modules are sometimes not rebuilt. Contributions to fix that deficiency in distutils are welcome.

Martin also pointed out a handy way of forcing a buildbot to start with a clean build: ask the buildbot to build a non-existing branch. This causes the checkouts to be deleted and the build to fail. The next regular build will then start from scratch.

.. _Python Community Buildbots: http://www.pybots.org/

Contributing thread:

- `Python unit tests failing on Pybots farm <http://mail.python.org/pipermail/python-dev/2006-October/069479.html>`__

---------------
Sqlite versions
---------------

Skip Montanaro ran into some problems running ``test_sqlite`` on OSX where he was getting a bunch of ``ProgrammingError: library routine called out of sequence`` errors. These errors appeared reliably when ``test_sqlite`` was run immediately after ctypes' ``test_find``. When he started linking to sqlite 3.1.3 instead of sqlite 3.3.8, the problems went away. Barry Warsaw mentioned that he had run into similar troubles when he tried to upgrade from 3.2.1 to 3.2.8.

Contributing thread:

- `Massive test_sqlite failure on Mac OSX ... sometimes <http://mail.python.org/pipermail/python-dev/2006-October/069504.html>`__

---------------------------------------------
Threads, generators, exceptions and segfaults
---------------------------------------------

Mike Klaas managed to `provoke a segfault`_ in Python 2.5 using threads, generators and exceptions. Tim Peters was able to whittle Mike's problem down to a relatively simple test case, where a generator was created within a thread, and then the thread vanished before the generator had exited. The segfault was a result of Python's attempt to clean up the abandoned generator, during which it tried to access the generator's already free()'d thread state. No clear solution to this problem had been decided on at the time of this summary.

.. _provoke a segfault: http://bugs.python.org/1579370

Contributing thread:

- `Segfault in python 2.5 <http://mail.python.org/pipermail/python-dev/2006-October/069464.html>`__

----------------
ctypes and win64
----------------

Previously, Thomas Heller had asked that ctypes be removed from the Python 2.5 win64 MSI installers since it did not work for that platform at the time. Since then, Thomas integrated some patches in the trunk so that _ctypes could be built for win64/AMD64. Backporting these fixes to Python 2.5 would have meant that, while the MSI installer would still not include it, _ctypes could be built from a source distribution on win64/AMD64. It was unclear whether this would constitute a bugfix (in which case the backport would be okay) or a feature (in which case it wouldn't).

Contributing thread:

- `ctypes and win64 <http://mail.python.org/pipermail/python-dev/2006-October/069495.html>`__

------------------------------
Python 2.3.X and 2.4.X retired
------------------------------

Anthony Baxter pushed out a Python 2.4.4 release and was pushing out the Python 2.3.6 source release as well. He indicated that once 2.3.6 was out, both of these branches could be officially retired.

Contributing thread:

- `state of the maintenance branches <http://mail.python.org/pipermail/python-dev/2006-October/069474.html>`__

---------------------------------------
Producing bytecode from Python 2.5 ASTs
---------------------------------------

Michael Spencer offered up his compiler2_ module, a rewrite of the compiler module which allows bytecode to be produced from ``_ast.AST`` objects. Currently, it produces almost identical output to ``__builtin__.compile`` for all the stdlib modules and their tests. He asked for feedback on what would be necessary to get it stdlib ready, but had no responses.

.. _compiler2: http://svn.brownspencer.com/pycompiler/branches/new_ast/

Contributing thread:

- `Fwd: Re: ANN compiler2 : Produce bytecode from Python 2.5 AST <http://mail.python.org/pipermail/python-dev/2006-October/069589.html>`__


==================
Previous Summaries
==================
- `Python 2.5 performance <http://mail.python.org/pipermail/python-dev/2006-October/069438.html>`__
- `Promoting PCbuild8 (Was: Python 2.5 performance) <http://mail.python.org/pipermail/python-dev/2006-October/069440.html>`__
- `2.3.6 for the unicode buffer overrun <http://mail.python.org/pipermail/python-dev/2006-October/069442.html>`__
- `2.4.4: backport classobject.c HAVE_WEAKREFS? <http://mail.python.org/pipermail/python-dev/2006-October/069494.html>`__


===============
Skipped Threads
===============
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-October/069437.html>`__
- `Problem building module against Mac Python 2.4 and Python 2.5 <http://mail.python.org/pipermail/python-dev/2006-October/069441.html>`__
- `svn.python.org down <http://mail.python.org/pipermail/python-dev/2006-October/069447.html>`__
- `BRANCH FREEZE release24-maint, Wed 18th Oct, 00:00UTC <http://mail.python.org/pipermail/python-dev/2006-October/069449.html>`__
- `who is interested on being on a python-dev panel at PyCon? <http://mail.python.org/pipermail/python-dev/2006-October/069457.html>`__
- `RELEASED Python 2.4.4, Final. <http://mail.python.org/pipermail/python-dev/2006-October/069472.html>`__
- `Nondeterministic long-to-float coercion <http://mail.python.org/pipermail/python-dev/2006-October/069477.html>`__
- `Promoting PCbuild8 <http://mail.python.org/pipermail/python-dev/2006-October/069490.html>`__
- `OT: fdopen on Windows question <http://mail.python.org/pipermail/python-dev/2006-October/069503.html>`__
- `Modulefinder <http://mail.python.org/pipermail/python-dev/2006-October/069518.html>`__
- `Optional type checking/pluggable type systems for Python <http://mail.python.org/pipermail/python-dev/2006-October/069520.html>`__
- `readlink and unicode strings (SF:1580674) Patch http://www.python.org/sf/1580674 fixes readlink's behaviour w.r.t. Unicode strings: without this patch this function uses the system default encoding instead of the filesystem encoding to convert Unicode objects to plain strings. Like os.listdir, os.readlink will now return a Unicode object when the argument is a Unicode object. What I'd like to know is if this can be backported to the 2.5 branch. The first part of this patch (use filesystem encoding instead of the system encoding) is IMHO a bugfix, the second part might break existing applications (that might not expect a unicode result from os.readlink). The reason I did this patch is that os.path.realpath currently breaks when the path is a unicode string with non-ascii characters and at least one element of the path is a symlink. Ronald <http://mail.python.org/pipermail/python-dev/2006-October/069524.html>`__
- `readlink and unicode strings (SF:1580674) <http://mail.python.org/pipermail/python-dev/2006-October/069526.html>`__
- `RELEASED Python 2.3.6, release candidate 1 <http://mail.python.org/pipermail/python-dev/2006-October/069553.html>`__
- `__str__ bug? <http://mail.python.org/pipermail/python-dev/2006-October/069554.html>`__
- `Hunting down configure script error <http://mail.python.org/pipermail/python-dev/2006-October/069558.html>`__
- `Python 2.4.4 docs? <http://mail.python.org/pipermail/python-dev/2006-October/069571.html>`__
- `DRAFT: python-dev summary for 2006-09-01 to 2006-09-15 <http://mail.python.org/pipermail/python-dev/2006-October/069598.html>`__
- `DRAFT: python-dev summary for 2006-09-16 to 2006-09-30 <http://mail.python.org/pipermail/python-dev/2006-October/069603.html>`__
- `[Python-checkins] r52482 - in python/branches/release25-maint: Lib/urllib.py Lib/urllib2.py Misc/NEWS <http://mail.python.org/pipermail/python-dev/2006-October/069605.html>`__
- `Typo.pl scan of Python 2.5 source code <http://mail.python.org/pipermail/python-dev/2006-October/069608.html>`__
- `build bots, log output <http://mail.python.org/pipermail/python-dev/2006-October/069617.html>`__
- `PyCon: proposals due by Tuesday 10/31 <http://mail.python.org/pipermail/python-dev/2006-October/069647.html>`__
- `test_codecs failures <http://mail.python.org/pipermail/python-dev/2006-October/069662.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
October 16, 2006 through October 31, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This python-dev summary is the 15th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
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--------------------
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--------------------

To comment on anything mentioned here, just post to
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something.  And if all of this really interests you then get involved
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-------------------------
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-------------------------

This summary is written using reStructuredText_. Any unfamiliar
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From python.sam at googlemail.com  Sat Nov  4 16:09:10 2006
From: python.sam at googlemail.com (sam)
Date: 4 Nov 2006 13:09:10 -0800
Subject: program written to model population evolving over time
Message-ID: <1162674550.159300.76590@m73g2000cwd.googlegroups.com>

dear all,

i've just finished a program which sets up an initial population
consisting of four different phenotypes, allows them to evolve over
time and graphs the output at the end, displaying what is in effect the
evolutionary steady state for the system.

i'm no authority on evolutionary game theory (to put it mildly), but
there is a certain amount of interesting emergent behaviour if you put
the initial parameters in in a certain manner.

excuse my ignorance, but is there a site where people post this kind of
stuff? i figured someone might be interested in playing with it,
tweaking it a bit, changing the parameters. i've only been programming
a couple of months, so i'm sure more experienced programmers could
whack into shape if they were interested. or not...

it's about 500 lines, including white space and comments, probably
about 400 lines of pretty unconcise code in all. thought i'd try and
contribute something for once instead of just asking questions.

sam

PS it does actually work, in case you're wondering.  :-)



From mail at microcorp.co.za  Sun Nov 19 02:13:00 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 19 Nov 2006 09:13:00 +0200
Subject: MAKE GOOD MONEY BY INTERNET
References: <1163848933.731124.307470@e3g2000cwe.googlegroups.com>
	<e%C7h.74$_H5.64@tornado.texas.rr.com>
Message-ID: <007c01c70baa$261f9ba0$03000080@hendrik>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote:


> Is there no way to filter this kind of junk, short of going to a moderated
> list?

I don't think its an easy thing to do - short of forcing all new threads to go
through some sort of portal, that is moderated, or having members with the
privilege of starting new threads, - which is completely useless, as newbies
have to somehow have access.

and simple things like blacklists are useless with the advent of all the free
mail account stuff out there - maybe we should start campaigning for an IP
address for life, implanted in yer skull at birth, complete with a small
quantity of RDX or something, just waiting for the right message...

I seem to remember a lot of discussion here driven by the author of - what -
spambayes - or something like that just recently - but I cant remember who he
was - maybe he can help...

- Hendrik



From georgeryoung at gmail.com  Mon Nov  6 02:08:36 2006
From: georgeryoung at gmail.com (georgeryoung at gmail.com)
Date: 5 Nov 2006 23:08:36 -0800
Subject: question about loading variables from a file...
In-Reply-To: <mcesk2tbcsm5aa4skvm2itsmvregemogo7@4ax.com>
References: <mcesk2tbcsm5aa4skvm2itsmvregemogo7@4ax.com>
Message-ID: <1162796916.428115.224860@m73g2000cwd.googlegroups.com>

On Nov 5, 2:26 pm, avidfan <n... at nowhere.com> wrote:
> Can someone offer some advice as to how the best way to approach this
> might be?
>
> I am trying to write a generic python script to build out some
> applications, so the python script will be generic enough to work for
> all of them, but it needs to 'source' a file that contains app and
> environment specific variables.
>
> I have used WLST, which provides the loadProperties() method for
> reading values for weblogic domains, but I'm trying to find the best
> way to do the same sort of thing in python...

Try configparser:
 http://docs.python.org/lib/module-ConfigParser.html



From cjw at sympatico.ca  Sat Nov 11 10:09:02 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sat, 11 Nov 2006 10:09:02 -0500
Subject: range syntax
In-Reply-To: <ej2buo$fdo$1@sea.gmane.org>
References: <ej23gl$du9$1@sea.gmane.org> <ej2buo$fdo$1@sea.gmane.org>
Message-ID: <ej4p2f$u3l$1@sea.gmane.org>

Fredrik Lundh wrote:
> Colin J. Williams wrote:
> 
>> One of the little irritants of Python is that the range syntax is rather 
>> long-winded:
>> [Dbg]>>> range(3, 20, 6)
>> [3, 9, 15]
>> [Dbg]>>>
>> It would be nice if one could have something like 3:20:6.
> 
> if you find yourself using range a lot, maybe you should check if you 
> couldn't use custom iterators more often.
> 
> or use the R helper:
> 
>  >>> R[3:20:6]
> [3, 9, 15]
>  >>> R[:20]
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
>  >>> R[0:20:2]
> [0, 2, 4, 6, 8, 10, 12, 14, 16, 18]
>  >>> R[1:20:2]
> [1, 3, 5, 7, 9, 11, 13, 15, 17, 19]
> 
> where R is defined as:
> 
>  >>> class R:
> ...     def __getitem__(self, slice):
> ...             return range(*slice.indices(slice.stop))
> ...
>  >>> R = R()
> 
> </F>
> 
Thanks, this appears to be a bit neater than the numpy version.  On the 
other hand, the numpy version provides a wider functionality.

R[start, stop, increment] is certainly a little simpler than 
range(start, stop, increment).  However, could we not achieve that with:
 >>> R= range
 >>> R(2, 20, 3)
[2, 5, 8, 11, 14, 17]
 >>>

Your point about iterators is well taken, but it seems that the range is 
used sufficiently frequently that some syntactic form would be helpful.

Colin W.



From czhang.cmu at gmail.com  Sat Nov  4 10:48:06 2006
From: czhang.cmu at gmail.com (czhang.cmu at gmail.com)
Date: 4 Nov 2006 07:48:06 -0800
Subject: PySchool - Online Python Web Framework Workshop.
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
	<agZ2h.4143$9v5.1633@newssvr29.news.prodigy.net>
	<1162651399.648891.31580@i42g2000cwa.googlegroups.com>
Message-ID: <1162655286.725917.312300@f16g2000cwb.googlegroups.com>

Interesting idea. Just realized that I am the first person who took the
republished survey. :-)
I suggest that you also post this message to various Python web
framework's m-list.

RobJ ???

> Thanks James and Steve for the feedback I have made the appropriate
> changes and republished the survey at the following URL:
>
> http://killersurvey.com/answer_survey.php?id=490

?Cheng Zhang
Gentoo/Python/Django Powered
http://www.ifaxian.com
1st Django powered site in Chinese ;-)
http://www.aiyo.cn
Our 2nd Django powered site in Chinese



From gagsl-py at yahoo.com.ar  Mon Nov 13 15:00:49 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 17:00:49 -0300
Subject: Printing database output in tabular form
In-Reply-To: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
References: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061113165637.03ed1df8@yahoo.com.ar>

At Monday 13/11/2006 16:40, ronrsr wrote:

>when I try to print a web table containing output from a database, I am
>getting more info than I want- -
>
>I would like this to print w'o the array('c',    AND I'd like the
>control characters to print as HTML control chars.
>
>array('c', '- "In the boom years of 1990-1997 developing countries paid
>more in debt service than they received in new assistance."
>\\r\\n\\r\\n- "Africa pays out $13.5 billion in debt service every
>year." \\r\\n\\r\\n- "Africa spends four times as much on debt
>repayment a')

You get an *array* object from the database...? Which database? Is it 
stored as a BLOB field or similar?
You could transform it to string using the tostring method, and 
decode it to unicode.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From bignose+hates-spam at benfinney.id.au  Sun Nov 26 19:07:21 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 27 Nov 2006 11:07:21 +1100
Subject: The Python Papers License Discussion
References: <1164581470.701666.158880@45g2000cws.googlegroups.com>
Message-ID: <871wnpu4zq.fsf@benfinney.id.au>

"tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:

> Thank you all who have commented on the licensing issues surrounding
> The Python Papers.

Thanks for patiently discussing it with your community.

>   1) Authors submitting to The Python Papers will be permitted to
> choose from a number of licenses for redistributing their
> work. (note -- their copyright agreement with The Python Papers is
> *separate* from the copyright agreement they choose to attach for
> general use). This will allow authors to choose greater freedoms to
> the re-use of their works if they wish.

>   2) The Python Papers will no longer use the slogin "free as in
> freedom" but will adopt the Creative Commons slogan "some rights
> reserved" in future communications, to the extent possible under
> human fallibility :)

These address my concerns at least, and I wish you the best success
with the future of The Python Papers.

-- 
 \        "The World is not dangerous because of those who do harm but |
  `\      because of those who look at it without doing anything."  -- |
_o__)                                                  Albert Einstein |
Ben Finney



From steven.bethard at gmail.com  Sun Nov 26 23:52:10 2006
From: steven.bethard at gmail.com (steven.bethard at gmail.com)
Date: Mon, 27 Nov 2006 04:52:10 +0000 (GMT)
Subject: python-dev Summary for 2006-11-01 through 2006-11-15
Message-ID: <20061127045213.410EC1E4007@bag.python.org>

python-dev Summary for 2006-11-01 through 2006-11-15
++++++++++++++++++++++++++++++++++++++++++++++++++++

.. contents::

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-11-01_2006-11-15]



=============
Announcements
=============

--------------------------
Python 2.5 malloc families
--------------------------

Just a reminder that if you find your extension module is crashing with Python 2.5 in malloc/free, there is a high chance that you have a mismatch in malloc "families". Unlike previous versions, Python 2.5 no longer allows sloppiness here -- if you allocate with the ``PyMem_*`` functions, you must free with the ``PyMem_*`` functions, and similarly, if you allocate with the ``PyObject_*`` functions, you must free with the ``PyObject_*`` functions.

Contributing thread:

- `2.5 portability problems <http://mail.python.org/pipermail/python-dev/2006-November/069967.html>`__


=========
Summaries
=========

----------------------------------
Path algebra and related functions
----------------------------------

Mike Orr started work on a replacement for `PEP 355`_ that would better group the path-related functions currently in ``os``, ``os.path``, ``shutil`` and other modules. He proposed to start with a `directory-tuple Path class`_ that would have allowed code like::

    # equivalent to
    # os.path.join(os.path.dirname(os.path.dirname(__FILE__)), "lib")
    os.path.Path(__FILE__)[:-2] + "lib"

where a Path object would act like a tuple of directories, and could be easily sliced and reordered as such.

As an alternative, glyph proposed using `Twisted's filepath module`_ which was already being used in a large body of code. He showed some common pitfalls, like that the existence on Windows of "CON" and "NUL" in *every* directory can make paths invalid, and indicated how FilePath solved these problems.

Fredrik Lundh suggested a reorganization where functions that manipulate path *names* would reside in ``os.path``, and functions that manipulate *objects* identified by a path would reside in ``os``. The ``os.path`` module would gain a path wrapper object, which would allow "path algebra" manipulations, e.g. ``path1 + path2``. The ``os`` module would gain some of the ``os.path`` and ``shutil`` functions that were manipulating real filesystem objects and not just the path names. Most people seemed to like this approach, because it correctly targeted the "algebraic" features at the areas where chained operations were most common: path name operations, not filesystem operations.

Some of the conversation moved on to the `Python 3000 list`_.

.. _PEP 355: http://www.python.org/dev/peps/pep-0355/
.. _directory-tuple Path class: http://wiki.python.org/moin/AlternativePathClass
.. _Twisted's filepath module: http://twistedmatrix.com/trac/browser/trunk/twisted/python/filepath.py
.. _Python 3000 list: http://mail.python.org/mailman/listinfo/python-3000

Contributing threads:

- `Path object design <http://mail.python.org/pipermail/python-dev/2006-November/069712.html>`__
- `Mini Path object <http://mail.python.org/pipermail/python-dev/2006-November/069775.html>`__
- `[Python-3000] Mini Path object <http://mail.python.org/pipermail/python-dev/2006-November/069776.html>`__

------------------
Replacing urlparse
------------------

A few more bugs in ``urlparse`` were turned up, and `earlier discussions about replacing urlparse`_ were briefly revisited. Paul Jimenez asked about `uriparse module`_ and was told that due to the constant problems with ``urlparse``, people were concerned about including the "incorrect" library again, so requirements were a little stringent. Martin v. Lowis gave him some guidance on a few specific points, and Nick Coghlan promised to try to post his `urischemes module`_ (a derivative of Paul's `uriparse module`_) to the `Python Package Index`_.

.. _earlier discussions about replacing urlparse: http://www.python.org/dev/summary/2006-06-01_2006-06-15/#rfc-3986-uniform-resource-identifiers-uris
.. _uriparse module: http://bugs.python.org/1462525
.. _urischemes module: http://bugs.python.org/1500504
.. _Python Package Index: http://www.python.org/pypi

Contributing threads:

- `patch 1462525 or similar solution? <http://mail.python.org/pipermail/python-dev/2006-November/069707.html>`__
- `Path object design <http://mail.python.org/pipermail/python-dev/2006-November/069712.html>`__

----------------------------------
Importing .py, .pyc and .pyo files
----------------------------------

Martin v. Lowis brought up `Osvaldo Santana's patch`_ which would have made Python search for both .pyc and .pyo files regardless of whether or not the optimize flag, "-OO", was set (like zipimporter does). Without this patch, when "-OO" was given, Python never looked for .pyc files. Some people thought that an extra ``stat()`` call or directory listing to check for the other file would be too expensive, but no one profiled the various versions of the code so the cost was unclear. People were leaning towards removing the extra functionality from zipimporter so that at least it was consistent with the rest of Python.

Giovanni Bajo suggested that .pyo file support should be dropped completely, with .pyc files being compiled at various levels of optimization depending on the command line flags. To make sure all your .pyc files were compiled at the same level of optimization, you'd use a new "-I" flag to indicate that all files should be recompiled, e.g. ``python -I -OO app.py``.

Armin Rigo suggested using .pyc files only as a means of caching bytecode for speed reasons, and introducing a new filename extension for importable bytecode files. This would have avoided a commonly encountered problem where Python uses stale .pyc files instead of the more up-to-date .py files. This can happen, for example, when a .py file is deleted without deleting the accompanying .pyc file -- if a new .py file of the same name is introduced somewhere else, it may be hidden unintentionally by the .pyc file.

There was some support for Armin's solution, but it was not overwhelming.

.. _Osvaldo Santana's patch: http://bugs.python.org/1346572

Contributing thread:

- `Importing .pyc in -O mode and vice versa <http://mail.python.org/pipermail/python-dev/2006-November/069822.html>`__

---------------------------------------------------------------
The buffer protocol and communicating binary format information
---------------------------------------------------------------

The discussion of extending the buffer protocol to more binary formats continued this fortnight. Though the PIL_ had been used as an example of a library that could benefit from an extended buffer protocol, Fredrik Lundh indicated that future versions of the PIL_ would make the binary data model completely opaque, and instead provide a view-style API like::

    view = object.acquire_view(region, supported formats)
    ... access data in view ...
    view.release()

Along these lines, the discussion turned away from the particular C formats used in ``ctypes``, ``numpy``, ``array``, etc. and more towards the best way to communicate format information between these modules. Though it seemed like people were not completely happy with the proposed API of the new buffer protocol, the discussion seemed to skirt around any concrete suggestions for better APIs.

In the end, the only thing that seemed certain was that a new buffer protocol could only be successful if it were implemented on all of the appropriate stdlib modules: ``ctypes``, ``array``, ``struct``, etc.

.. _PIL: http://www.pythonware.com/products/pil/

Contributing threads:

- `PEP: Adding data-type objects to Python <http://mail.python.org/pipermail/python-dev/2006-November/069706.html>`__
- `PEP: Extending the buffer protocol to share array information. <http://mail.python.org/pipermail/python-dev/2006-November/069709.html>`__
- `idea for data-type (data-format) PEP <http://mail.python.org/pipermail/python-dev/2006-November/069733.html>`__

-----------------
dir() and __dir__
-----------------

Tomer Filiba continued his `previous investigations`_ into adding a ``__dir__()`` method to allow customization of the ``dir()`` builtin. He moved most of the current ``dir()`` logic into ``object.__dir__()``, with some additional logic necessary for modules and types being moved to ``ModuleType.__dir__()`` and ``type.__dir__()`` respectively. He posted a `patch for his implementation`_ and it got approval for Python 2.6.

There was a brief discussion about whether or not it was okay for an object to lie about its members, with Fredrik Lundh suggesting that you should only be allowed to *add* to the result that ``dir()`` produces. Nick Coghlan pointed out that when a class overrides ``__getattribute__()``, attributes that the default ``dir()`` implementation sees can be blocked, in which case removing members from the result of ``dir()`` might be quite appropriate.

.. _previous investigations: http://www.python.org/dev/summary/2006-07-01_2006-07-15/#adding-a-dir-magic-method
.. _patch for his implementation: http://bugs.python.org/1591665

Contributing thread:

- `__dir__, part 2 <http://mail.python.org/pipermail/python-dev/2006-November/069865.html>`__

--------------------------------
Invalid read errors and valgrind
--------------------------------

Using valgrind, Herman Geza found that he was getting some "Invalid read" read errors in PyObject_Free which weren't identified as acceptable in Misc/README.valgrind. Tim Peters and Martin v. Lowis explained that these are okay if they are reads from Py_ADDRESS_IN_RANGE. If the address given is Python's own memory, a valid arena index is read. Otherwise, garbage is read (though this read will never fail since Python always reads from the page where the about-to-be-freed block is located). The arenas are then checked to see whether the result was garbage or not.

Neal Norwitz promised to try to update Misc/README.valgrind with this information.

Contributing thread:

- `valgrind <http://mail.python.org/pipermail/python-dev/2006-November/069884.html>`__

---------------------------
SCons and cross-compilation
---------------------------

Martin v. Lowis reviewed a `patch for cross-compilation`_ which proposed to use SCons_ instead of distutils because updating distutils to work for cross-compilation would have involved some fairly major changes. Distutils had certain notions of where to look for header files and how to invoke the compiler which were incorrect for cross-compilation, and which were difficult to change. While accepting the patch would not have required SCons_ to be added to Python proper (which a number of people opposed), people didn't like the idea of having to update SCons configuration in addition to already having to update setup.py, Modules/Setup and the PCbuild area. The patch was therefore rejected.

.. _patch for cross-compilation: http://bugs.python.org/841454
.. _SCons: http://www.scons.org/

Contributing thread:

- `Using SCons for cross-compilation <http://mail.python.org/pipermail/python-dev/2006-November/069917.html>`__

----------------------------
Individual interpreter locks
----------------------------

Robert asked about having a separate lock for each interpreter instance instead of the global interpreter lock (GIL). Brett Cannon and Martin v. Lowis explained that a variety of objects are shared between interpreters, including:

* extension modules
* type objects (including exception types)
* singletons like ``None``, ``True``, ``()``, strings of length 1, etc.
* many things in the sys module

A single lock for each interpreter would not be sufficient for handling access to such shared objects.

Contributing thread:

- `Feature Request: Py_NewInterpreter to create separate GIL (branch) <http://mail.python.org/pipermail/python-dev/2006-November/069815.html>`__

---------------------------
Passing floats to file.seek
---------------------------

Python's implementation of ``file.seek`` was converting floats to ints. `Robert Church suggested a patch`_ that would convert floats to long longs and thus support files larger than 2GiB. Martin v. Lowis proposed instead to use the ``__index__()`` API to support the large files and to raise an exception for float arguments. Martin's approach was approved, with a warning instead of an exception for Python 2.6.

.. _Robert Church suggested a patch: http://bugs.python.org/1067760

Contributing thread:

- `Passing floats to file.seek <http://mail.python.org/pipermail/python-dev/2006-November/069948.html>`__

----------------------------------------
The datetime module and timezone objects
----------------------------------------

Fredrik Lundh asked about including a ``tzinfo`` object implementation for the ``datetime`` module, along the lines of the ``UTC``, ``FixedOffset`` and ``LocalTimezone`` classes from the `library reference`_. A number of people reported having copied those classes into their own code repeatedly, and so Fredrik got the go-ahead to put them into Python 2.6.

.. _library reference: http://docs.python.org/lib/datetime-tzinfo.html

Contributing thread:

- `ready-made timezones for the datetime module <http://mail.python.org/pipermail/python-dev/2006-November/069951.html>`__


================
Deferred Threads
================
- `Summer of Code: zipfile? <http://mail.python.org/pipermail/python-dev/2006-November/069955.html>`__
- `Results of the SOC projects <http://mail.python.org/pipermail/python-dev/2006-November/069968.html>`__


==================
Previous Summaries
==================
- `The "lazy strings" patch [was: PATCH submitted: Speed up + for string concatenation, now as fast as "".join(x) idiom] <http://mail.python.org/pipermail/python-dev/2006-November/069816.html>`__


===============
Skipped Threads
===============
- `RELEASED Python 2.3.6, FINAL <http://mail.python.org/pipermail/python-dev/2006-November/069752.html>`__
- `[Tracker-discuss] Getting Started <http://mail.python.org/pipermail/python-dev/2006-November/069811.html>`__
- `Status of pairing_heap.py? <http://mail.python.org/pipermail/python-dev/2006-November/069820.html>`__
- `Inconvenient filename in sandbox/decimal-c/new_dt <http://mail.python.org/pipermail/python-dev/2006-November/069896.html>`__
- `test_ucn fails for trunk on x86 Ubuntu Edgy <http://mail.python.org/pipermail/python-dev/2006-November/069904.html>`__
- `Weekly Python Patch/Bug Summary <http://mail.python.org/pipermail/python-dev/2006-November/069909.html>`__
- `Last chance to join the Summer of PyPy! <http://mail.python.org/pipermail/python-dev/2006-November/069913.html>`__
- `[Python-checkins] r52692 - in python/trunk: Lib/mailbox.py Misc/NEWS <http://mail.python.org/pipermail/python-dev/2006-November/069919.html>`__
- `PyFAQ: help wanted with thread article <http://mail.python.org/pipermail/python-dev/2006-November/069965.html>`__
- `Arlington sprint this Saturday <http://mail.python.org/pipermail/python-dev/2006-November/069966.html>`__
- `Suggestion/ feature request <http://mail.python.org/pipermail/python-dev/2006-November/069985.html>`__





========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
November 01, 2006 through November 15, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This python-dev summary is the 16th written by 
Steve Bethard. 

To contact me, please send email:

- Steve Bethard (steven.bethard at gmail.com)

Do *not* post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
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-------------------------

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From sjmachin at lexicon.net  Fri Nov 17 03:24:15 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 00:24:15 -0800
Subject: determining the bounds of a tuple returned from a database
In-Reply-To: <1163746899.262327.72100@h48g2000cwc.googlegroups.com>
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
	<1163744646.708954.271010@f16g2000cwb.googlegroups.com>
	<mailman.308.1163746322.32031.python-list@python.org>
	<1163746899.262327.72100@h48g2000cwc.googlegroups.com>
Message-ID: <1163751854.923117.290320@h48g2000cwc.googlegroups.com>

ronrsr top-posted [uncorrected]:
> very sorry, that was my error - len(result[0]) and len(result[1]) both
> return 1 --
>
> i think I'm misunderstanding what len() does - to me they appear to
> have 2 or 3 elements, or at least be composed of a string of some
> length.

len(result) is 248 because you have retrieved 248 rows from the
database.

len(result[0]), len(result[1]), etc etc are all each 1 because you have
selected only one column from each row -- I'm guessing here because you
have not supplied the SQL query [that would have been much better than
the last 200 rows of result!]

To get the one column out, you need to select the first (and only!)
column from each row.

result[0][0]
result[1][0]
etc

>
> I guess len() isn't the function i'm looking for then.  How do I tell
> how many strings, or how many bytes are in each dimension?  so that I
> can iterate through them.

len() *is* the function that you are looking for. The problem that
needs to be solved before we can help you is that we don't understand
your data. Stripped of all the Python "punctuation", what you would see
if you used some user-interface tool [I'm not familiar with mysql] to
"print" each row to your screen  *might* be something like this [it
would number lines from 1 but we'll do it from 0 to avoid doubling the
confusion]

0: Agricultural subsidies; Foreign aid
1: Agriculture; Sustainable Agriculture - Support; Organic Agriculture;
Pesticides, US, Childhood Development, Birth Defects; Toxic Chemicals
2: Antibiotics, Animals
3: Agricultural Subsidies, Global Trade
4: Agricultural Subsidies
5: Biodiversity
etc

Looks like each line contains one or more topics separated by
semicolons. E.g. in line 0,
"Agricultural subsidies" and "Foreign aid" are 2 topics. Line 1
contains 5 topics.

Note carefully:
[1] Line 4 has 1 topic; it is essentially the *same* topic as the first
topic in line 0 but note "S" versus "s"
[2] Either Line 3 has 1 topic which is a *subtopic* of "Agricultural
Subsidies" *OR* the comma should be a semi-colon [so that it would have
2 topics, very similar to line 0] -- in any case, this is a
complication ....

>
> Each entry in that list is a keyword

What do you mean by "entry" and "list" and "keyword"? Give examples.

 - Alternately, is there any fast
> way to parse that into a sorted list of distinct keywords.

Quite possibly, if only you could say what you mean by "keywords".
Please give a *small* example, like what you would expect from the
first 6 lines as quoted above.

Multi-topic lines can be split up by using line.split(";") -- but
understanding (at least partial)  should come before coding, IMHO.

HTH,
John

> Fredrik Lundh wrote:
> > ronrsr wrote:
> >
> > > it looks like the  len() function is the one I want.
> > >
> > > for:   len(result) - i get 248,
> > >
> > > but for len(result[0]) or len(result[1]) i always get 0.
> >
> > that's a bit surprising, because both items are tuples that contain
> > exactly one item:
> >



From sjmachin at lexicon.net  Tue Nov 28 14:48:07 2006
From: sjmachin at lexicon.net (John Machin)
Date: 28 Nov 2006 11:48:07 -0800
Subject: Simple text parsing gets difficult when line continues to next
	line
References: <1164736781.710725.134790@h54g2000cwb.googlegroups.com>
Message-ID: <1164743287.835802.205540@h54g2000cwb.googlegroups.com>

Jacob Rael wrote:
> Hello,
>
> I have a simple script to parse a text file (a visual basic program)
> and convert key parts to tcl. Since I am only working on specific
> sections and I need it quick, I decided not to learn/try a full blown
> parsing module. My simple script works well until it runs into
> functions that straddle multiple lines. For example:
>
>   Call mass_write(&H0, &HF, &H4, &H0, &H5, &H0, &H6, &H0, &H7, &H0,
> &H8, &H0, _
>                 &H9, &H0, &HA, &H0, &HB, &H0, &HC, &H0, &HD, &H0, &HE,
> &H0, &HF, &H0, -1)
>
>
> I read in each line with:
>
> for line in open(fileName).readlines():
>
> I would line to identify if a line continues (if line.endswith('_'))
> and concate with the next line:
>
> line = line + nextLine
>
> How can I get the next line when I am in a for loop using readlines?

Don't do that. I'm rather dubious about approaches that try to grab the
next line on the fly e.g. fp.next(). Here's a function that takes a
list of lines and returns another with all trailing whitespace removed
and the continued lines glued together. It uses a simple state machine
approach.

def continue_join(linesin):
    linesout = []
    buff = ""
    NORMAL = 0
    PENDING = 1
    state = NORMAL
    for line in linesin:
        line = line.rstrip()
        if state == NORMAL:
            if line.endswith('_'):
                buff = line[:-1]
                state = PENDING
            else:
                linesout.append(line)
        else:
            if line.endswith('_'):
                buff += line[:-1]
            else:
                buff += line
                linesout.append(buff)
                buff = ""
                state = NORMAL
    if state == PENDING:
        raise ValueError("last line is continued: %r" % line)
    return linesout

import sys
fp = open(sys.argv[1])
rawlines = fp.readlines()
cleanlines = continue_join(rawlines)
for line in cleanlines:
    print repr(line)
===
Tested with following files:
C:\junk>type contlinet1.txt
only one line

C:\junk>type contlinet2.txt
line 1
line 2

C:\junk>type contlinet3.txt
line 1
line 2a _
line 2b _
line 2c
line 3

C:\junk>type contlinet4.txt
line 1
_
_
line 2c
line 3

C:\junk>type contlinet5.txt
line 1
_
_
line 2c
line 3 _

C:\junk>

HTH,
John



From rridge at csclub.uwaterloo.ca  Tue Nov  7 12:57:11 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 7 Nov 2006 09:57:11 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
Message-ID: <1162922230.992249.52430@f16g2000cwb.googlegroups.com>

Ross Ridge wrote:
> That doesn't really make sense.  The object can't be deleted because
> the thread should already have a reference (directly or indirectly) to
> the object, otherwise any access to it can cause the race condition you
> describe.

Joe Seigh wrote:
> True but if the thread didn't already have a reference, how would you get
> that initial reference to a shared object without a lock?

The thread that shares it increments the reference count before passing
its address to directly another thread or indirectly through a shared
container.

                                Ross Ridge



From mcfletch at vrplumber.com  Thu Nov 30 10:18:24 2006
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Thu, 30 Nov 2006 10:18:24 -0500
Subject: "fork and exit" needed?
In-Reply-To: <hnrtm25a9s72a6bacjocreq4md14sr4qar@4ax.com>
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>	<pan.2006.11.28.09.15.45.744752@gmx.net>	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>	<7nqtm25fq8vk4jlu577n974hgei3ese3g7@4ax.com>
	<hnrtm25a9s72a6bacjocreq4md14sr4qar@4ax.com>
Message-ID: <456EF640.4070105@vrplumber.com>

Vincent Delporte wrote:
> On Thu, 30 Nov 2006 15:38:11 +0100, Vincent Delporte <bla at bla.com>
> wrote:
>   
>> Here's my Python rewrite:
>> http://codecomplete.free.fr/asterisk/python_cid.txt
>>     
First line of your script should be:

#! /usr/bin/env python

which is how Linux knows what interpreter to use for the script.

HTH,
Mike

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



From larry.bates at websafe.com  Thu Nov 16 18:49:17 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 16 Nov 2006 17:49:17 -0600
Subject: How to make a python file to a DLL?
In-Reply-To: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
References: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>
Message-ID: <AeKdnSCLpI5qZcHYnZ2dnUVZ_oadnZ2d@comcast.com>

many_years_after wrote:
> Any solution?
> 
> Thanks.
> 
You can certainly make python program/function into a COM object
which can be called from other languages quite easily and I think
is the more preferred method in newer software.  py2exe has
examples of creating COM objects.

-Larry


From sven.dahlstrand at gmail.com  Sat Nov 11 06:00:44 2006
From: sven.dahlstrand at gmail.com (Sven)
Date: 11 Nov 2006 03:00:44 -0800
Subject: urlretrieve get file name
In-Reply-To: <mailman.2075.1163202322.11739.python-list@python.org>
References: <1163110313.580268.19660@h48g2000cwc.googlegroups.com>
	<mailman.2004.1163115558.11739.python-list@python.org>
	<1163116359.787681.31490@m73g2000cwd.googlegroups.com>
	<mailman.2008.1163118450.11739.python-list@python.org>
	<1163188701.981923.18960@h48g2000cwc.googlegroups.com>
	<mailman.2075.1163202322.11739.python-list@python.org>
Message-ID: <1163242844.110164.149920@i42g2000cwa.googlegroups.com>

> You can use the geturl() method to obtain the true URL used (that
> would behttp://page.com/filename.zip) and then rename the file.

Thanks mate, this was exactly what I needed. A realy clean and simple
solution to my problem. :-)



From no-spam at no-spam-no-spam.invalid  Thu Nov 23 05:39:05 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 23 Nov 2006 11:39:05 +0100
Subject: X class missing in Python :-) - Re: What's going on here?
In-Reply-To: <1164229537.289097.172140@l39g2000cwd.googlegroups.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
	<ek2cm5$h2$1@news.albasani.net>
	<1164229537.289097.172140@l39g2000cwd.googlegroups.com>
Message-ID: <ek3toc$39d$1@news.albasani.net>

John Machin wrote:
> robert wrote:
>> Dale Strickland-Clark wrote:
>>> Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
>>> [GCC 4.1.0 (SUSE Linux)] on linux2
>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>> a = object()
>>>>>> a
>>> <object object at 0xb7bbd438>
>>>>>> a.spam = 1
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in ?
>>> AttributeError: 'object' object has no attribute 'spam'
>>>>>> class b(object):
>>> ...    pass
>>> ...
>>>>>> a = b()
>>>>>> a
>>> <__main__.b object at 0xb7b4dcac>
>>>>>> a.spam = 1
>>>>>>
>>> What is subclassing adding to the class here? Why can't I assign to
>>> attributes of an instance of object?
>>
>> Python sooooo dynamic, but it lacks a (builtin) X-class ready for ad-hoc usage just like dict() :-)
>> I have in almost every app/toolcore-module this one:
>>
>> ------
>>
>> class X(object):
>>     def __init__(self,_d={},**kwargs):
>>         kwargs.update(_d)
>>         self.__dict__=kwargs
>> class Y(X):
>>     def __repr__(self):
>>         return '<Y:%s>'%self.__dict__
>>
>> ------
>>
>> x=X(spam=1)
>>
>> Maybe X should be renamed to __builtin__.Object ...
>>
>>
> 
> Have you considered putting it in one file and *importing* it into
> "almost every app/toolcore-module"?

(yes its in my core python "language extension" module, which I import frequently in apps)

> Have you considered that others may like to have something a little
> more elaborate, like maybe using the pprint module, or that the amount
> of data that would spew out might in some cases be so great that they
> wouldn't want that every time from repr(), preferring a dump-style
> method that wrote to a logfile?

(in X is no repr so far. of course one could make a default repr with short output. had no frequent needs so far)

> IMHO that's one of the enormous number of good points about Python; you
> can easily lash up something like that to suit yourself and inject it
> into any class you like; there's no central authority tying your hands
> behind your back.

its more about the general case, trying things out on the interactive etc. always - thus when I want speed not "suit"  :-)

very often I need a dummy object and find me always typing "class X:pass" or import above tools.
Think this trivial but needed Object() thing is possibly more than a private sitecustomize-thing. Thats why I wrote here upon seeing others trying object() which doesn't do what one expects at first.
It wouldn't really tie hands or ? but possibly converse

Robert


From srikrishnamohan at gmail.com  Wed Nov 22 15:19:03 2006
From: srikrishnamohan at gmail.com (km)
Date: Thu, 23 Nov 2006 01:49:03 +0530
Subject: regex problem
In-Reply-To: <4564AD0D.80806@tim.thechases.com>
References: <f4cc03640611221141j51f2bcb1wa06d7a05db42a46c@mail.gmail.com>
	<4564AD0D.80806@tim.thechases.com>
Message-ID: <f4cc03640611221219paa74079qdc79e7afaaf16f1b@mail.gmail.com>

HI Tim,

oof!
thats true!

thanks a lot.
Is there any tool to simplify building the regex  ?

regards,
KM

On 11/23/06, Tim Chase <python.list at tim.thechases.com> wrote:
>
> > line is am trying to match is
> > 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra    29.9    0.00011
> 1
> >
> > regex i have written is
> > re.compile
> >
> (r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)')
> >
> > I am trying to extract 0.0011 value from the above line.
> > why doesnt it match the group(4) item of the match ?
> >
> > any idea whats wrong  with it ?
>
> Well, your ".{25}\s{3}" portion only gets you to one space short
> of your 29.9, so your "(\d+..." fails to match " 29.9" because
> there's an extra space there.  My guess (from only one datum, so
> this could be /way/ off base) would be that you mean "\s{4}" or
> possibly "\s{3,4}"
>
> It seems like a very overconstrained regexp, but it might be just
> what you need to isolate the single line (or class of line)
> amongst the chaff of thousand others of similar form.
>
> -tkc
>
>
>
>
>
>
-------------- next part --------------
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From rvernica at gmail.com  Wed Nov  8 01:06:42 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Tue, 07 Nov 2006 22:06:42 -0800
Subject: use of (a**b) (a*b)
In-Reply-To: <caa940d20611072124g53bfa933j533a618e9e55bbb6@mail.gmail.com>
References: <caa940d20611072124g53bfa933j533a618e9e55bbb6@mail.gmail.com>
Message-ID: <eirs33$kth$1@sea.gmane.org>

Hi,

Check out some examples:
In [16]: 9./2
Out[16]: 4.5

In [17]: 9.//2
Out[17]: 4

In [18]: 2*3
Out[18]: 6

In [19]: 2**3
Out[19]: 8

Here is the documentation for these operations:
http://docs.python.org/lib/typesnumeric.html

Regards,
Ray

Santosh Chikkerur wrote:
> Hi Friends,
> Let me know the use of ' ** ' operator and ' \\' use.
> 
> f=(3*s**2) how is it different, if use only single '*' and also the 
> divide operator.
> 
> 
> Thanks in advance,
> Santosh
> 
> 



From fredrik at pythonware.com  Sat Nov  4 03:24:17 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 04 Nov 2006 09:24:17 +0100
Subject: Sorted and reversed on huge dict ?
In-Reply-To: <1162625961.267184.129220@b28g2000cwb.googlegroups.com>
References: <1162580533.981364.211860@h54g2000cwb.googlegroups.com>	<mailman.1735.1162581960.11739.python-list@python.org>	<7xvelwib1b.fsf@ruckus.brouhaha.com>	<mailman.1739.1162583532.11739.python-list@python.org>	<1162590153.024233.311670@b28g2000cwb.googlegroups.com>	<1162616047.891549.29550@b28g2000cwb.googlegroups.com>
	<1162625961.267184.129220@b28g2000cwb.googlegroups.com>
Message-ID: <eihing$1cp$1@sea.gmane.org>

vd12005 at yahoo.fr wrote:

> Klaas > i do not know about intern construct, i will have look, but
> when googling 

the description in the documentation is pretty concise, I think:

     http://effbot.org/pyref/intern

</F>



From fredrik at pythonware.com  Thu Nov 23 09:34:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 15:34:01 +0100
Subject: non blocking "i o", The deep freeze.
References: <1164291575.215166.29330@m7g2000cwm.googlegroups.com>
Message-ID: <ek4bgp$jln$1@sea.gmane.org>

guy.flowers at Machineworks.com wrote:

> The whole thing works pretty well, a part from every so offen completely
> randomly the 3 machines seem to freeze (or to put in the terms of our sys
> admin it trashes them).

thrashing?

that usually means that a process uses too much memory, thus causing the
system to spend too much time swapping to be able to do anything useful.

have you checked the process size during normal operations?  is it stable, or
does it grow a little all the time?

> According to the sys admin I need to be using, non blocking "i o" for
> my file control

if the problem is thrashing, I'm not sure I see how that would help.

</F> 





From userprogoogle-139 at yahoo.co.uk  Wed Nov 15 04:55:48 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 15 Nov 2006 01:55:48 -0800
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
	<1163530584.269684.214520@h48g2000cwc.googlegroups.com>
Message-ID: <1163584548.308113.235040@i42g2000cwa.googlegroups.com>

dakman at gmail.com wrote:

> By large I mean an application with intensive operations, such as a
> fancy GUI maybe a couple of threads, accessing a database, etc.

I am still fairly new to Python, I only started using it at the start
of this year and then stopped for a while. However the project I
undertook at the start of the year built a system using the
technologies above, in addition it used SVG graphics, Jabber Instant
messaging and the windows API. All of these were built within threads
and used a client/server architecture.  I have also built some small
wxPython based GUI's.

Overall I found Python ideal for the task, both in terms of development
time and reliability - although my knowledge of the Windows API was not
what it should have been (I mainly used Linux/Mac OS X user) so I
experienced a few problems. Also there was a lack of good online docs
about Python based Windows API calls.

You can interface to a few databases very easily including MySQL and
SQLite. I have been using the latter recently for my task and it works
very well. Also I have found that using Stackless Python drastically
improves the reliability of thread based applications. Also performance
"can" be substantially improved by using the Psyco library, although I
have know it to make things worse.

Overall my experience of Python was very positive and this was in no
small part due to the help I received from people here.

I hope this helps.

Best,

Rod



From skip at pobox.com  Sat Nov 11 18:13:36 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 11 Nov 2006 17:13:36 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej5g0e$1jp$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
Message-ID: <17750.22816.636590.485360@montanaro.dyndns.org>


    >>>>> I'm not sure why '\'s are required to do multi-line before the colon.
    >>>> Special cases aren't special enough to break the rules.
    >>>> 
    >>>> Georg
    >>> A bit of a circular answer.
    >>> 
    >>> Why the rule? -> So not to break the rule?
    >> 
    >> You proposed to allow leaving off line continuation '\' only in the
    >> "if", "for" and "while" headers. This is a special case in my eyes.

    Ron> I wasn't that specific and it was related to Michael's suggestion
    Ron> the colon wasn't needed. If the need for '\' was dropped in
    Ron> multi-line block headers, then the colon would be required for an
    Ron> obvious reason.

But \ is used to continue all sorts of statements/expressions, e.g.:

    x = a + \
          b

not just conditionals.

Skip


From curtin at computer.org  Sat Nov  4 11:25:36 2006
From: curtin at computer.org (curtin)
Date: 4 Nov 2006 08:25:36 -0800
Subject: python to sharepoint ?
Message-ID: <1162657536.386483.191300@h54g2000cwb.googlegroups.com>

anyone have code that allows me to post files direct to sharepoint from
python? 

any pointers, FAQ, etc,  appreciated!

thanks,

craig



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Nov  9 16:22:28 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 09 Nov 2006 22:22:28 +0100
Subject: How to choose the right GUI toolkit ?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<1163092380.301382.113470@m7g2000cwm.googlegroups.com>
Message-ID: <4rhkgkFriokeU1@mid.individual.net>

Dan Lenski wrote:

> for my next project.  I too would avoid Qt, not because of the GPL
> but simply because I don't use KDE under Linux and because Qt is
> not well supported under Cygwin or on native Windows. 

Why not?

BTW, big projects such as the Opera browser use Qt. Also in Windows.

Regards,


Bj?rn

-- 
BOFH excuse #381:

Robotic tape changer mistook operator's tie for a backup tape.



From richmoore44 at gmail.com  Fri Nov 24 10:56:25 2006
From: richmoore44 at gmail.com (richmoore44 at gmail.com)
Date: 24 Nov 2006 07:56:25 -0800
Subject: ANNOUNCE: WSGI XSS Prevention Middleware
Message-ID: <1164383785.309595.221290@45g2000cws.googlegroups.com>

Hi,

I've just written a python WSGI middleware class to mitigate
XSS flaws, it's released under the python license. I've
attached the docs below.

Cheers

Rich.

WSGI Middleware class that prevents cross-site scripting flaws
in WSGI applications being exploited. Potentially malicious GET
and POST variables are checked for, and if found, a 403
Forbidden response is sent to the client.

Note that this class can false positive on input such as XML
or passwords containing the '<' character, so it is not useful
in all contexts. In addition, you should note that this
middleware is not a replacement for properly validating
input and quoting output.

This class can be downloaded from:
http://www.westpoint.ltd.uk/dist/wsgisecurity.zip

Author: Richard Moore, rich at westpoint.ltd.uk
Copyright: (c) 2006 Westpoint Ltd
License: Released under the Python License
Version: 1.0



From bumtool at gmail.com  Sat Nov 18 07:36:46 2006
From: bumtool at gmail.com (kilnhead)
Date: 18 Nov 2006 04:36:46 -0800
Subject: installing modules
Message-ID: <1163853406.767016.75110@j44g2000cwa.googlegroups.com>

I am sure this has been asked a gazillion times, but here it is again.
When installing  something like pyRTF, I extract the zip file to a
folder called pyRTFtemp, and then run "setup.py install" in that
folder. After that, can I get rid of the pyRTFtemp folder, or do I need
to keep it? This question applies to a lot of the modules I have
installed. Thanks.

-- 
efil si doog



From gagsl-py at yahoo.com.ar  Wed Nov 29 21:38:53 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 23:38:53 -0300
Subject: Joining data from three different files to be written into
	three Columns
In-Reply-To: <bf6723080611291807x5fa33d79y1487eb70156ae903@mail.gmail.co
 m>
References: <bf6723080611291807x5fa33d79y1487eb70156ae903@mail.gmail.com>
Message-ID: <7.0.1.0.0.20061129233002.05bb3e38@yahoo.com.ar>

At Wednesday 29/11/2006 23:07, Dawn Abbott wrote:

>I have three files of binary data.  I want to write the three binary 
>data files to one file.  I want the old files to each have their own 
>column in the new file.  This is what I have,
>
>f=open('relative_x.INT32','rb')
>a=array('l')
>a.fromfile(f,10)
>g=open('relative_y.INT32','rb')
>b=array('l')
>b.fromfile(g,10)
>data=zip(a,b)
>for datum in data:
>...    print ' '.join(datum)
>...
>
>
>the error I get is expected string, found int
>I figure that the joint is for strings only does anyone know of a 
>way were I could join the data that would be for ints.

Do you want to write a TEXT representing the binary values?

for datum in data:
     print ' '.join(map(str,datum))


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Thu Nov 16 05:03:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:03:54 +0100
Subject: Data structure for ordered sequence
In-Reply-To: <ejhbm4$i30$1@news.albasani.net>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>	<mailman.50.1163412604.32031.python-list@python.org>	<1163416085.099968.185390@b28g2000cwb.googlegroups.com>
	<ejhbm4$i30$1@news.albasani.net>
Message-ID: <ejhd2a$est$3@sea.gmane.org>

robert wrote:

>>> how many rectangles do you plan to store in this structure?
 >
>> Around 150 max
> 
> And seeking/change frequency? fix dimensions? Probably for a GUI/mouse thing. 
> =>Not worth worring about a 2D-tree structure. A Python list ? :-)
 > Insert/change coordinates at no costs and seek the list with a
 > 3-liner and you are quite fast :-)  Any sophisticated tree
 > fumbling will cost more.
> Or at max use a 1D-btree thing or so for x0,x1 or a fix 16x16 array ..

thanks for writing the reply I didn't get around to write ;-)

</F>



From sc0ttsm1th__at__yahoo__dot_com  Thu Nov  9 13:00:08 2006
From: sc0ttsm1th__at__yahoo__dot_com (Scott Smith)
Date: Thu, 9 Nov 2006 11:00:08 -0700
Subject: Vim/Python Help
Message-ID: <37d8e$45536caa$43b07816$714@msgid.meganewsservers.com>

To all you vi/vim users out there.....

I am just getting into python and am trying to learn how to use the 
python.vim script.  I really like the fact that it autoindents for me while 
inserting defs etc, but how do I move my cursor to back to outer block (say 
at the end of a def) to continue with writing next def while still in insert 
mode?  Right now I have to get out of insert mode to do this....very 
annoying! 




From Johanna.Pfalz at telus.net  Thu Nov  2 12:33:08 2006
From: Johanna.Pfalz at telus.net (Johanna Pfalz)
Date: Thu, 02 Nov 2006 09:33:08 -0800
Subject: Converting a .dbf file to a CSV file
Message-ID: <C16F6BD4.477%Johanna.Pfalz@telus.net>

Is there a module/method in python to convert a file from .DBF format to
.CSV format?

Johanna Pfalz





From grumman at example.com  Sat Nov 11 20:19:45 2006
From: grumman at example.com (Grumman)
Date: Sat, 11 Nov 2006 20:19:45 -0500
Subject: odd problem with watsup and VB6 application with modal dialog
In-Reply-To: <Xns9878BAAE62FBErtwfreenetREMOVEcouk@216.196.109.145>
References: <JNc5h.194$3i6.48@newsfe03.lga>
	<Xns9878BAAE62FBErtwfreenetREMOVEcouk@216.196.109.145>
Message-ID: <HDu5h.307$LK7.86@newsfe05.lga>

Rob Williscroft wrote:
> Here's a rewrite of the winGuiAuto.clickButton function,
> post_clickButton() that uses PostMessage:

Thanks for the info, I'll give it a try.


From walterbyrd at iname.com  Wed Nov 15 21:03:30 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 18:03:30 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.216.1163638822.32031.python-list@python.org>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<mailman.182.1163566134.32031.python-list@python.org>
	<455babb2$0$20635$426a74cc@news.free.fr>
	<mailman.216.1163638822.32031.python-list@python.org>
Message-ID: <1163642610.270391.150490@i42g2000cwa.googlegroups.com>


Gabriel Genellina wrote:
> - php sucks :)
> I think that it's such a braindead
> language which turns people into braindead programmers :)
>
>

In fairness, a lot of very serious work is done in PHP. I think yahoo
and other major web-sites use php.

I have issues with PHP as well. They will break backward compatibility
on a whim, and it is an ugly language - especially when mixed with
html. But, PHP does have it's streaths, and Python is not without it's
weaknesses.



From sjmachin at lexicon.net  Thu Nov 30 19:47:21 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 16:47:21 -0800
Subject: String formatters with variable argument length
In-Reply-To: <1164932769.210948.289560@f1g2000cwa.googlegroups.com>
References: <mailman.905.1164931966.32031.python-list@python.org>
	<1164932769.210948.289560@f1g2000cwa.googlegroups.com>
Message-ID: <1164934041.015131.15880@h54g2000cwb.googlegroups.com>


John Machin wrote:
> Fredrik Tolf wrote:
> > I've been trying to get the string formatting operator (%) to work with
> > more arguments than the format string requires, but I can find no way to
> > do that. For example:
> >
> > >>> "%i" % 10
> > '10'
> > >>> "i" % 10
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > TypeError: not all arguments converted during string formatting
> >
> > The thing is, I want to get format strings from the user, and I don't
> > want to require the user to consume all the arguments. docs.python.org
> > doesn't seem to have any clues on how to achieve this, and I can't think
> > of what to google for.
> >
> > Could it be as I fear, that it is impossible?
> >
>
> Three approaches spring to mind. In descending order of my preference:
>
> (a) don't do that
>
> (b) parse the format string, counting the number of args required. If
> the user has supplied more, throw them away.
>
> (c) wrap your execution of format_string % args in a try/except
> bracket. If you get a TypeError with that message [not guaranteed to
> remain constant in the future], throw away the last arg and go around
> again.
>
> As a matter of curiosity, why don't you want the user to consume all
> the arguments? Don't they get even a teensy-weensy warning message? Are
> you writing a Perl interpreter in Python?
>

Another approach: instead of the "%s %.2f %.5f%%" style, give the users
a list of names of each possible arg so that they can do e.g.

"The rate for %(name)s is %(rate).5f%%"
or
"Amount borrowed: $%(amount).2f; borrower: %(name)s"

HTH,
John



From rrr at ronadam.com  Sat Nov 11 13:54:35 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sat, 11 Nov 2006 12:54:35 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <pan.2006.11.11.13.39.39.253916@REMOVE.THIS.cybersource.com.au>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<4rhku3FriokeU2@mid.individual.net>	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>	<4rjlkqFrlskqU1@mid.individual.net>	<pan.2006.11.10.17.36.56.825161@gmx.net>	<4rk5giFrerjfU1@mid.individual.net>	<pan.2006.11.11.00.45.49.644854@REMOVE.THIS.cybersource.com.au>	<mailman.2084.1163229430.11739.python-list@python.org>
	<pan.2006.11.11.13.39.39.253916@REMOVE.THIS.cybersource.com.au>
Message-ID: <ej56gd$6qj$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Sat, 11 Nov 2006 01:13:03 -0600, Ron Adam wrote:
> 
>> Steven D'Aprano wrote:
>>> On Fri, 10 Nov 2006 21:24:50 +0100, Bjoern Schliessmann wrote:
>>>
>>>> Marc 'BlackJack' Rintsch wrote:
>>>>
>>>>> No it doesn't -- look again at the example given above.  It's
>>>>> legal syntax in Python but doesn't have the semantics implied by
>>>>> the example.
>>>> Sorry, I don't understand -- what is the difference between the
>>>> example as it is and the implied semantics of it?
>>> Inform 6 "x == blue or red or yellow" is equivalent to the Python
>>>  
>>> x == blue or x == red or x == yellow
>> Maybe it should have been expressed as:
>>
>>      x == (blue or red or yellow)
> 
> 
> But that has very different semantics still -- since parentheses have the
> highest priority, it means "evaluate (blue or red or yellow), then test if
> x is equal to the result".
> 
> It might be useful on occasion to have a construct for "x equals blue or
> red or yellow" in the sense used by normal English or Inform 6. And,
> funnily enough, Python has such a construct. You just have to write "in"
> instead of ==, and use a tuple for the terms:
> 
> x in (blue, red, yellow)
> 
> Not hard to remember, and unambiguous.

Yes, that is the correct best way to do it, of course.

Funny thing is I tested a variation of the above version in a console and it 
seemed to work, which surprised me.  Now I can't get it to work, <scratching 
head>.  I don't know exactly what I typed in last night, so I can't figure out 
what subtle (or overlooked obvious) characteristics my test had which gave me 
the misleading results.

Sigh. I did think it was kind of odd it (apparently) worked, which was why I 
phrased it as a suggestion.

Cheers,
    Ron



From steve at ferg.org  Fri Nov  3 14:05:09 2006
From: steve at ferg.org (Steve)
Date: 3 Nov 2006 11:05:09 -0800
Subject: Tools for Java/Python scripting
References: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>
	<mailman.1722.1162571941.11739.python-list@python.org>
Message-ID: <1162580709.531475.155520@k70g2000cwa.googlegroups.com>

The URL is now:
http://wiki.python.org/moin/JavaScripting



From john106henry at hotmail.com  Mon Nov  6 19:17:26 2006
From: john106henry at hotmail.com (John Henry)
Date: 6 Nov 2006 16:17:26 -0800
Subject: auto indent
In-Reply-To: <mailman.1816.1162844560.11739.python-list@python.org>
References: <mailman.1816.1162844560.11739.python-list@python.org>
Message-ID: <1162858646.141609.42140@h48g2000cwc.googlegroups.com>


M.N.Smadi wrote:
> Hi there;
>
> i have a script that is not indented properly. Is there a way that i can
> have it auto indented.
>
> thanks
> moe smadi

It depends what exactly you mean.  I use Textpad and they have an
"indent selected block" feature.



From otw67 at xs4all.nl  Fri Nov 10 05:10:48 2006
From: otw67 at xs4all.nl (ruud habets)
Date: Fri, 10 Nov 2006 11:10:48 +0100
Subject: python wiki question
In-Reply-To: <455446a7$0$335$e4fe514c@news.xs4all.nl>
References: <455446a7$0$335$e4fe514c@news.xs4all.nl>
Message-ID: <45545027$0$324$e4fe514c@news.xs4all.nl>

ruud habets schreef:
> Hi,
> 
> Does anybody know how to determine if a wiki page is a redirectpage 
> using the wikipedia-scripts? It must be something like
> 
> if IsRedirectPage() == False:
>    text_file.write("\n")
> 
> But I cannot seem to get it working.
> 
> thnx
> Ruud
problem solved:

def workon(page):
     try:
         text = page.get()
     except wikipedia.IsRedirectPage:
         return

     text_file.write(page.title().encode("utf-8"))
     text_file.write("\n")
     text_file.write(page.get().encode("utf-8"))
     text_file.write("\n")
     print page

thnx anyway
ruud


From chewjeremy at gmail.com  Mon Nov  6 01:33:43 2006
From: chewjeremy at gmail.com (chewjeremy at gmail.com)
Date: 5 Nov 2006 22:33:43 -0800
Subject: Timer Usage
Message-ID: <1162794823.678654.55620@i42g2000cwa.googlegroups.com>

I'm planning to do C++ development together with Python on Linux. I
understand that Linux allows only one timer per process. Does Python
use the Linux timer? If so, how do I use the timer without interfering
with Python?



From whiterabbott at gmail.com  Wed Nov 29 21:07:03 2006
From: whiterabbott at gmail.com (Dawn Abbott)
Date: Wed, 29 Nov 2006 18:07:03 -0800
Subject: Joining data from three different files to be written into three
	Columns
Message-ID: <bf6723080611291807x5fa33d79y1487eb70156ae903@mail.gmail.com>

I have three files of binary data.  I want to write the three binary data
files to one file.  I want the old files to each have their own column in
the new file.  This is what I have,

f=open('relative_x.INT32','rb')
a=array('l')
a.fromfile(f,10)
g=open('relative_y.INT32','rb')
b=array('l')
b.fromfile(g,10)
data=zip(a,b)
for datum in data:
...    print ' '.join(datum)
...


the error I get is expected string, found int
I figure that the joint is for strings only does anyone know of a way were I
could join the data that would be for ints.
Thanks
Dawn
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From doobiz at gmail.com  Wed Nov 22 00:34:38 2006
From: doobiz at gmail.com (doobiz at gmail.com)
Date: 21 Nov 2006 21:34:38 -0800
Subject: Caution newbie question: python window to stay open ?
In-Reply-To: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
References: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
Message-ID: <1164173678.423588.169540@k70g2000cwa.googlegroups.com>

mkengel wrote:

> Caution: newbie question


If you're pretty sure it's a common newbie question, then begin by
going to the Google repository at:

http://groups.google.com/group/comp.lang.python

Search in the box at upper right, on, say, keep cmd window open, or
keep dos window open.

Like so:

http://tinyurl.com/yfbtgx

And you'll have answers going all the way back to antiquity.

rd



From phil at riverbankcomputing.co.uk  Wed Nov 22 09:27:08 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Wed, 22 Nov 2006 14:27:08 +0000
Subject: PyQt app in seperate thread
In-Reply-To: <1164204404.675906.59020@b28g2000cwb.googlegroups.com>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
Message-ID: <200611221427.08729.phil@riverbankcomputing.co.uk>

On Wednesday 22 November 2006 2:06 pm, anders wrote:
> Phil Thompson wrote:
> > On Wednesday 22 November 2006 12:37 pm, anders wrote:
> > > I am writing a plugin for a piece of software in python, and I want to
> > > start up a PyQt GUI in the plugin, without stalling the main thread
> > > while the gui is running (later i will want to pass messages between
> > > the main thread and the gui thread).
> > >
> > > I'm new to pyqt, so I'm probably doing something very silly, but for
> > > the moment I'm just trying to get the first pyqt tutorial example
> > > running in a seperate thread:
> > >
> > > ----8<--------
> > >
> > > import sys
> > > from PyQt4 import QtGui
> > > from PyQt4 import QtCore
> > >
> > > class MyThread( QtCore.QThread ):
> > > 	def __init__( self ):
> > > 		QtCore.QThread.__init__( self )
> > >
> > > 	def run( self ):
> > > 		app = QtGui.QApplication( sys.argv )
> > > 		hello = QtGui.QPushButton( 'Hello world!' )
> > > 		hello.resize( 500, 500 )
> > > 		hello.show()
> > > 		app.exec_()
> > > 		QtCore.QThread.terminate(  )
> > >
> > >
> > >
> > > mt = MyThread()
> > > mt.start()
> > > print 'Main thread continuing...'
> > > mt.wait()
> > > print 'GUI thread finished.'
> > >
> > > ----8<--------
> > >
> > > The app starts up (with a warning WARNING: QApplication was not created
> > > in the main() thread. ). I get a window, but no button, and clicking on
> > > the close button does nothing and I have to force the program to quit.
> > >
> > > There's got to be a way to get this working, right? Can anyone help me
> > > along the right path?
> >
> > Read http://doc.trolltech.com/4.2/threads.html
> >
> > In particular the bit that says that exec_() must be called from the main
> > thread and not from a QThread.
> >
> > Phil
>
> OK so that's all good... so how do I go about doing what I want then?
> Can I set up a window in the second thread and start its event loop
> without running the event loop in the core app?

No. Read the second sentence of the paragraph I referred to. Also read the 
section "QObject Reentrancy".

Phil


From paddy3118 at netscape.net  Wed Nov 29 00:24:30 2006
From: paddy3118 at netscape.net (Paddy)
Date: 28 Nov 2006 21:24:30 -0800
Subject: 6 Pick Bet Grouping
In-Reply-To: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
Message-ID: <1164777870.480711.28130@l12g2000cwl.googlegroups.com>


bullockbefriending bard wrote:


> e.g. we might have:
>
> 5 / 3 / 11 / 7 / 1 / 9  - $50  (5 to come 1st or 2nd in Race1, 3 to
> come first or 2nd in Race 2, etc.)
> 7 / 3 / 11 / 7 / 1 / 9  - $50
> 5 / 3 / 11 / 14 / 1 / 9  - $50
> 7 / 3 / 11 / 14 / 1 / 9  - $50
>
> The totalizator system allows us to merge or group these four bets as
> follows:
>
> 5 + 7 / 3 / 11 / 7 + 14 / 1 / 9 - $50  ($200 total)

It is unclear to me how you go from the four lines to the one, (or
vice-versa)?
Could you expand the explanation?
- paddy.



From bignose+hates-spam at benfinney.id.au  Thu Nov 23 00:29:29 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 23 Nov 2006 16:29:29 +1100
Subject: Python, WSGI, legacy web application
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
	<1164249020.575863.28770@l12g2000cwl.googlegroups.com>
Message-ID: <87psbevih2.fsf@benfinney.id.au>

"ToddG" <tdgrmsn at gmail.com> writes:

> > Ben Finney wrote:
> > > Is it possible to write a Python WSGI program that talks to a
> > > PHP program as its "back end"? Where can I find out how to do
> > > this, preferably with examples?
>
> Perhaps:
>
> http://pythonpaste.org/wphp/
> http://blog.ianbicking.org/2006-wphp.html

Looks good. Can anyone here tell any stories about using this for its
stated purpose?

Where would be the best place to ask further questions on this?

-- 
 \         "Two paradoxes are better than one; they may even suggest a |
  `\                                      solution."  -- Edward Teller |
_o__)                                                                  |
Ben Finney



From jhefferon at smcvt.edu  Mon Nov  6 15:36:21 2006
From: jhefferon at smcvt.edu (Jim)
Date: 6 Nov 2006 12:36:21 -0800
Subject: building python with utf-8 default encoding?
In-Reply-To: <1162841363.747050.79790@b28g2000cwb.googlegroups.com>
References: <1162841363.747050.79790@b28g2000cwb.googlegroups.com>
Message-ID: <1162845381.428030.193070@k70g2000cwa.googlegroups.com>


metaperl.etc at gmail.com wrote:
> I am playing around with OpenSwarm and was shocked to see that I cannot
> build Python with default encoding of utf-8 by passing a flag to
> configure... did I miss the option for doing so?
It is not set when you build but is instead set in sitecustomize.py.
But changing it is typically inadvisable in that any programs you write
will not port to other people's machines.

Jim



From maxerickson at gmail.com  Fri Nov 10 15:47:42 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Fri, 10 Nov 2006 20:47:42 +0000 (UTC)
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
	<2006111015340116807-jameshcunningham@gmailcom>
Message-ID: <Xns9877A0A5A971Emaxericksongmailcom@80.91.229.5>

>>> color='orange'
>>> if color=='red' or 'blue' or 'green':
	print "Works?"

	
Works?
>>> 



From mail at microcorp.co.za  Tue Nov 14 02:23:56 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 14 Nov 2006 09:23:56 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>	<4558D443.1030802@hobbshouse.org>	<ejakm2$44p$1@sea.gmane.org><4558DBEF.8010409@hobbshouse.org>
	<ejaqdh$q8v$1@sea.gmane.org>
Message-ID: <02da01c707c2$8345fb80$03000080@hendrik>

 "Robert Kern" <robert.kern at gmail.com> wrote:


> Michael Hobbs wrote:
> > True enough. Although, I have to ask how many times you define a new
> > function only to have Python spit a syntax error out at you saying that
> > you forgot a colon. It happens to me all the time. (Usually after an
> > "else") If you'd never notice that the colon was missing if the compiler
> > didn't point it out, is it really that readable? For me, I tend to get
> > annoyed at language "features" that I'm constantly tripping over.
>
> Never.

I confess I find myself in the position of a Yorkshire Youngster - I don't
believe you!

- Hendrik



From lukasz.langa at gmail.com  Sat Nov 18 00:07:41 2006
From: lukasz.langa at gmail.com (=?UTF-8?B?xYF1a2FzeiBMYW5nYQ==?=)
Date: Sat, 18 Nov 2006 06:07:41 +0100
Subject: How can I speed this function up?
In-Reply-To: <3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<3Mu7h.67910$rP1.39757@news-server.bigpond.net.au>
Message-ID: <455E951D.4090209@gmail.com>

   Hi, Chris.
   I made a trivial testing framework for this cute problem and tried a 
couple of modifications. I also added the 10% of non-ELEMENT lines you 
mentioned. First thing, your updated algorithm didn't really get me much 
faster results than the original. I guess that my disk array sort of 
hides the multiple write penalty. But I experimented with various 
algorithms. Here's the code in its entirety: 
http://www.rafb.net/paste/results/ZuW4fK85.html My results (Python 2.4, 
32bit Fedora Core) were:

[ksh at lapoire tmp]# python test.py
Preparing data...
[write_data1] Preparing output file...
[write_data1] Writing...
[write_data1] Done in 10.73 seconds.
[write_data4] Preparing output file...
[write_data4] Writing...
[write_data4] Done in 10.46 seconds.
[write_data_flush] Preparing output file...
[write_data_flush] Writing...
[write_data_flush] Done in 9.09 seconds.
[write_data_per_line] Preparing output file...
[write_data_per_line] Writing...
[write_data_per_line] Done in 9.71 seconds.
[write_data_once] Preparing output file...
[write_data_once] Writing...
[write_data_once] Done in 7.82 seconds.

   I'm pretty sure that your measures will vary (observing your results 
you seem to have a faster CPU but slower disk(s)). But you can just take 
what works best for you. I'm also quite confident that you won't be able 
to catch up C since as you can see Python's data structures are far more 
flexible and thus require more processing overhead.

   Regards,
   ?ukasz



From steve.ingram at tnei.co.uk  Sun Nov 12 15:50:04 2006
From: steve.ingram at tnei.co.uk (Steve Ingram)
Date: Sun, 12 Nov 2006 20:50:04 -0000 (UTC)
Subject: Close program built with py2exe
Message-ID: <2712.80.46.127.179.1163364604.squirrel@www.tnei.co.uk>

Found out what I'd done, and it wasn't py2exe causug the problem. I wasn't
 closing the main dialog properly, I was calling Close() instead of
Destroy(), so the dialog stayed in memory, basically it was still running.

Thanks for your help,

steve

-----Original Message-----
From: Fredrik Lundh [mailto:fredrik at pythonware.com]
Sent: 12 November 2006 12:50
To: python-list at python.org
Subject: Re: Close program built with py2exe

Steve Ingram wrote:

> I've got a problem with a program I've written and want to distribute.
> It uses a wxPython dialog and I've built a distribution version with
py2exe.
> Problem is when I run the .exe under windows I can only stop the
> program completely using the task manager. When I close the dialog and
> check the task manager, there is still a running process. I think this
> is probably the python interpreter that is still running.
>
> Can't find any help anywhere, does anyone know how to get the dialog
> to kill the process properly??

have you checked if any exceptions occur during application shutdown?

it could be that the GUI toolkit manages to remove all windows, but that
something goes wrong at the application level before the GUI gets around
to shut down the message loop.

</F>






From no-spam at no-spam-no-spam.invalid  Thu Nov 16 05:19:03 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 16 Nov 2006 11:19:03 +0100
Subject: split CSV fields
Message-ID: <ejhduq$l5l$1@news.albasani.net>

What is a most simple expression for splitting a CSV line with "-protected fields?

s='"123","a,b,\"c\"",5.640'


From fredrik at pythonware.com  Wed Nov 29 15:15:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 21:15:36 +0100
Subject: utf - string translation
In-Reply-To: <1164829990.146305.92750@l39g2000cwd.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>	<mailman.605.1164221562.32031.python-list@python.org>	<O319h.1989$%_2.110@newsfe19.lga>	<Xns9883C1C005EDFduncanbooth@127.0.0.1>	<mf19h.1992$%_2.1833@newsfe19.lga>	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>	<1164529973.299095.155940@n67g2000cwd.googlegroups.com>	<mailman.832.1164798594.32031.python-list@python.org>
	<1164829990.146305.92750@l39g2000cwd.googlegroups.com>
Message-ID: <ekkpp7$gu$1@sea.gmane.org>

John Machin wrote:

> 3. ... and to check for missing maps. The OP may be working only with
> French text, and may not care about Icelandic and German letters, but
> other readers who stumble on this (and miss past thread(s) on this
> topic) may like something done with \xde (capital thorn),  \xfe (small
> thorn) and \xdf (sharp s aka Eszett).

I did post links to code that does this to this thread, several days ago...

</F>



From alw at gpas.ru  Sun Nov 19 06:27:27 2006
From: alw at gpas.ru (Alexey Wasilyev)
Date: Sun, 19 Nov 2006 14:27:27 +0300
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118192248.GB29614@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
	<20061118192248.GB29614@58sirius016.dc.ukrtel.net>
Message-ID: <697146390.20061119142727@gpas.ru>

????????????, Kirill.

?? ?????? 18 ?????? 2006 ?., 22:22:48:
>> > Could anyone suggest me a simple IDE suitable for teaching Python as a
>> > first programming language to high school students?
>> 
>>    Does it have to be an IDE? Wouldn't it be better to use a simple text
>> editor + command line?
> Preferably.  I believe that using a editor + command line will only make
> things worse because console and GUI have different encodings under
> Windows.  So a student that have written a script in a GUI editor and saved
> it in UTF-8 would see garbage in console.

??????, ??? ? ?? ??????? ????? ??? ???? :)
? ???? ?????????? ??????? ??????????? IDE. ????? ????????? ?
??????????? ???????? ? ide ?? ??? ?????? ???? ?????????? ????????,
?????????? ? ???????? ???????? ??????, ?????????????? ????... ??? ??????? ????? ????????? ??
????? ?????????? ?????????? komodo. ?? ? ??, ????????????
????????????, ?????????, ?? vcs ????? ?????? css ?? svn.
SourceOffSite'? ?? ????? :( ????????, ?????????? ? ??????????? ide ??
?????? ?????? ????? :)


-- 
? ?????????,
 Alexey                          mailto:alw at gpas.ru



From tleeuwenburg at gmail.com  Tue Nov 28 18:07:23 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 28 Nov 2006 15:07:23 -0800
Subject: Wrapping A Shell
In-Reply-To: <mailman.811.1164742722.32031.python-list@python.org>
References: <mailman.811.1164742722.32031.python-list@python.org>
Message-ID: <1164755243.249302.295030@j72g2000cwa.googlegroups.com>


Jeremy Moles wrote:
> I'm not sure if this is really the right place to ask this question, but
> since the implementation is in Python, I figured I'd give it a shot.
>
> I want to "wrap" a shell process using popen inside of python program
> rather than creating a new shell process for each line I process in the
> app. For example, the code might look like:
>
>
> 	std = stdin, stdout, stderr = os.popen3("bash")
>
> 	print >> stdin, "ls"
>
> 	print stdout.readline()
>
> However, it appears my understanding of popen (or perhaps buffered IO)
> is off somewhere, because this certainly doesn't work anything like I
> expect it to (it hangs on stdout.readline).
>
> Obviously the example above is very contrived, but eventually I'll be
> using this in an OpenGL "terminal" widget. Am I approaching this the
> wrong way?

Try flushing the bufffer for stdin.


Cheers,
-T



From fredrik at pythonware.com  Tue Nov 14 07:17:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 13:17:46 +0100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com><455226c0$0$17087$c3e8da3@news.astraweb.com><slrnel6088.tvc.nick@irishsea.home.craig-wood.com><45530513$0$25102$426a74cc@news.free.fr><slrnel6dec.360.nick@irishsea.home.craig-wood.com><45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au><4554AAB4.10002@hobbshouse.org><mailman.2054.1163185546.11739.python-list@python.org><ej5asp$e85$1@news.albasani.net><mailman.2105.1163279202.11739.python-list@python.org><ej5e69$j1q$1@news.albasani.net>
	<ej5g0e$1jp$1@sea.gmane.org><17750.22816.636590.485360@montanaro.dyndns.org><ej6erq$vkh$1@sea.gmane.org>
	<4558B9E3.2040207@hobbshouse.org><mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
Message-ID: <ejcc5b$8et$1@sea.gmane.org>

Antoon Pardon wrote:

> Why not? My impression is that removing redundancy is considered
> a positive thing here in c.p.l.

so why are you still here?

</F> 





From cliff at develix.com  Wed Nov  8 12:22:50 2006
From: cliff at develix.com (Cliff Wells)
Date: Wed, 08 Nov 2006 09:22:50 -0800
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <1162997345.277966.31860@h48g2000cwc.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<454dd84b$0$328$e4fe514c@news.xs4all.nl>
	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>
	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>
	<mailman.1827.1162864080.11739.python-list@python.org>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
Message-ID: <1163006570.3371.18.camel@localhost.localdomain>

On Wed, 2006-11-08 at 06:49 -0800, Beliavsky wrote:
> Cliff Wells wrote:

> > The LA Times had a story that claimed that 64% of U.S. citizens use the
> > word "fuck" and that 74% of us have heard it in public (I'll assume the
> > remainder are your fellow AOL users).  I expect extrapolating these
> > results worldwide wouldn't be far off the mark (the Brits were quite
> > successful at spreading this versatile word).
> 
> If this is supposed to justify using bad language in a public forum, it
> is poorly reasoned. Having heard "f***" does not mean they were not
> annoyed. 
> 100% of people have seen trash on the street, but that does
> not justify littering. 

Poorly reasoned or not, it was clearly poorly read, since the article I
mentioned also claimed that the majority of people also used the word.
Odd, I'd think with your selective reading skills you'd simply be able
to ignore words you don't like.

Regardless, I think the idea that certain words are profanity is fairly
silly.  They are words.  It's the meaning and intent behind them that
can be offensive.  If someone says "fuck off" then I'd expect you to be
offended *since that was the intent of the message* (of course if you
manage to not be offended then that makes you the better man, but
apparently that's rarely strived for).  On the other hand if someone
says "that's fucking great" in a positive way and you are offended by
it, well I'd say that's *your* problem and your best bet is to turn off
your TV, your PC, your radio, stop reading and try to limit interactions
with other people lest you be overwhelmed by how they really speak and
act.

> If a group of people don't mind profanity, there
> is no harm in their swearing to each other. But Usenet is read by a
> wide range of people, and needlessly offending some of them is wrong.

I halfway agree with you.  I tend to limit my profanity in public forums
and when speaking to strangers, etc.  On the other hand, when in public
I also expect to hear that language from others and am not offended by
it.  

And expecting anyone to escape without offense on Usenet is pretty
unrealistic.

> The OP used "f******" just for emphasis. English is a rich language,
> and there are better ways of doing that.

Hm, lots of people disagree with you.  In fact, simply because that word
*does* happen to be less widely used in this group it gave it extra
emphasis and was probably the most effective word he could have used in
this particular instance.  I don't think anyone here will have forgotten
his endorsement anytime soon.

Incidentally, using **** to disguise "profanity" when the intended word
is perfectly understood is pretty silly too.  I strongly suspect you'd
be just as offended if I said "f*** off" as if I'd typed it out.  Once
again, intent and meaning are what matter rather than a particular
sequence of characters.

Regards,
Cliff



From tleeuwenburg at gmail.com  Thu Nov 23 22:53:08 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 23 Nov 2006 19:53:08 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.662.1164330306.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
Message-ID: <1164340388.885058.264750@l12g2000cwl.googlegroups.com>


Ben Finney wrote:
> "tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
>
> > Yes, it's true that you can't resell copies of The Python Papers for
> > personal profits, but you may derive from it, reproduce and
> > propagate it. You're quite right to point it out.
>
> Then please revise the false statement that the publication is "free
> as in beer and freedom", or make it true by releasing the documents
> under a license that does grant conventional free-software freedoms.
>
> --
>  \       "They can not take away our self respect if we do not give it |
>   `\                                      to them."  -- Mahatma Gandhi |
> _o__)                                                                  |
> Ben Finney

I thought I just had. In what way does the statement "Yes, it's true
that you can't resell copies of The Python Papers for personal profits,
but you may derive from it, reproduce and propagate it" not provide
such a revision and clarification? Seriously, let me know what exact
statement you feel needs to be made, and I will endorse it accordingly
if it is accurate.

For my part, I don't see that there are ethically serious restrictions
on the freedom of use of the information contained within The Python
Papers. Call it "mostly free" if you like. There's no such thing as
complete freedom of information anyway, and we have done the best we
can.

It's not software. The GPL is not the only license which preserves the
free use of the information containted within and I don't think there's
any contradiction in what we are doing...

We considered releasing under the GPL, but felt that we wanted to
preserve two things which don't seem to be provided by it:
  * Rights of the author to attribution as may be expected and desired
of an academic publication. The GPL doesn't seem appropriate for
disseminating the work of a single author.
  * Rights of the author to have their words presented
  * Opportunity for the author to commercially license their works to
other vendors. By choosing the Share Alike restriction, we have
encouraged the free dissemination of research information without
affecting its commercial use. It seemed to be the best middle ground
between taking a strong ideological position on either side that would
be bound to put people off side. It preserves some rights for the
author while still allowing a substantial amount of free re-use.
  * Reputation as an unbiased, financially disinterested group. By
distributing under the license we chose, we hoped to establish our
credentials.

Your email indicates a possible concern that we are doing something
untoward -- this was not at all intended, nor is it true.

Cheers,
-T
(Editor-In-Chief)



From martin at v.loewis.de  Fri Nov 17 20:08:37 2006
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sat, 18 Nov 2006 02:08:37 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
Message-ID: <455E5D15.7030207@v.loewis.de>

gabor schrieb:
> depends on the application. in the one where it happened i would just
> display an error message, and tell the admins to check the
> filesystem-encoding.
> 
> (in other ones, where it's not critical to get the correct name, i would
> probably just convert the text to unicode using the "replace" behavior)
> 
> what about using flags similar to how unicode() works? strict, ignore,
> replace and maybe keep-as-bytestring.
> 
> like:
> os.listdir(dirname,'strict')
> 
> i know it's not the most elegant, but it would solve most of the
> use-cases imho (at least my use-cases).

Of course, it's possible to implement this on top of the existing
listdir operation.

def failing_listdir(dirname, mode):
  result = os.listdir(dirname)
  if mode != 'strict': return result
  for r in result:
    if isinstance(r, str):
      raise UnicodeDecodeError
  return result

Regards,
Martin


From __peter__ at web.de  Sun Nov  5 13:23:31 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 05 Nov 2006 19:23:31 +0100
Subject: maybe this is a print odds
References: <1162750262.316632.298600@e3g2000cwe.googlegroups.com>
Message-ID: <eila6p$5gi$03$1@news.t-online.com>

pipehappy wrote:

> I come this code:
> 
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win
> 32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> class He(object):
> ...     def __str__(self):
> ...         return "He"
> ...
>>>> hes = [He(),He(),He()]
>>>> print hes
> [<__main__.He object at 0x00BE92D0>, <__main__.He object at
> 0x00BE9370>, <__main
> __.He object at 0x00BE93B0>]       # I expect output: [He,He,He]
>>>> print hes[0]
> He
>>>>
> 
> Do anyone know trick to overcome this or python has some proposal to
> extend print that can do iterately print? I just want to get the way of
> print which I my guess. Thanks a lot!

Lists print their items via repr(), not str():

>>> class Ho(object):
...     def __str__(self):
...             return "That's a bit early, don't you think?"
...     def __repr__(self):
...             return "Ho"
...
>>> print [Ho()] * 3
[Ho, Ho, Ho]
>>> print Ho()
That's a bit early, don't you think?

Peter


From john106henry at hotmail.com  Sat Nov 25 17:43:26 2006
From: john106henry at hotmail.com (John Henry)
Date: 25 Nov 2006 14:43:26 -0800
Subject: case insensitive dictionary
Message-ID: <1164494606.514366.124810@l39g2000cwd.googlegroups.com>

I believe the standard dictionary should be amened to allow the use of
case insensitive keys - as an option.  I found some work done by others
to do that at:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/283455

but the problem with that approach is that they lowercase the keys
immediately when you create the dictionary and so the true identity of
the key is lost.

Of course, I can subclass it and save a copy of the "real" key but
that's kind of messcy.

In other words:

If I have:

    pets=caselessDict()

    pets["Cat"] = 3
    pets["Dog"] = 2

I would like to see:

   pets["cat"]  prints 3
   pets["DOG"] prints 2

but

   print pets.keys()

should print:

"Cat", "Dog"

not:

"cat", "dog"



From jameshcunningham at gmail.com  Fri Nov 10 15:34:01 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Fri, 10 Nov 2006 15:34:01 -0500
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<4rhku3FriokeU2@mid.individual.net>
	<slrnel92ta.1r8.horpner@FIAD06.norwich.edu>
	<4rjlkqFrlskqU1@mid.individual.net>
	<pan.2006.11.10.17.36.56.825161@gmx.net>
	<4rk5giFrerjfU1@mid.individual.net>
Message-ID: <2006111015340116807-jameshcunningham@gmailcom>

On 2006-11-10 15:24:50 -0500, Bjoern Schliessmann 
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> said:

> Marc 'BlackJack' Rintsch wrote:
> 
>> No it doesn't -- look again at the example given above.  It's
>> legal syntax in Python but doesn't have the semantics implied by
>> the example.
> 
> Sorry, I don't understand -- what is the difference between the
> example as it is and the implied semantics of it?
> 
> Regards,
> 
> 
> Bj?rn

Yes, I'm not sure myself.

In [1]: color = "red"

In [2]: if color == "red" or "blue" or "green":
   ...:     print 'Works.'
   ...:
   ...:
Works.

In [3]: if color == "blue" or "red" or "green":
   ...:     print 'Works.'
   ...:
   ...:
Works.

In [4]: if not color == "blue" or "green":
   ...:     print 'Works.'
   ...:
   ...:
Works.



From python.list at tim.thechases.com  Fri Nov 17 14:14:40 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 17 Nov 2006 13:14:40 -0600
Subject: remove a list from a list
In-Reply-To: <ejl13i$hqv$1@sea.gmane.org>
References: <ejkv1u$ajf$1@sea.gmane.org> <455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org>
Message-ID: <455E0A20.9000509@tim.thechases.com>

> That is a nice solution.
> 
> But, how about modifying the list in place?
> 
> That is, l would become ['c', 'D'].
>
>>  >>> e = ['a', 'b', 'e']
>>  >>> l = ['A', 'a', 'c', 'D', 'E']
>>  >>> s = set(e)
>>  >>> [x for x in l if x.lower() not in s]
>> ['c', 'D']


Well...changing the requirements midstream, eh? ;-)

You can just change that last item to be a reassignment if "l" is 
all you care about:

 >>> l = [x for x in l ...]

Things get a bit hairier if you *must* do it in-place.  You'd 
have to do something like this (untested)

for i in xrange(len(l), 0, -1):
	if l[i-1].lower() in s:
		del l[i-1]


which should do the job.

-tkc





From laurent.pointal at limsi.fr  Tue Nov 14 06:47:22 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 14 Nov 2006 12:47:22 +0100
Subject: graphical class diagram tool?
In-Reply-To: <1163503825.406640.171740@m73g2000cwd.googlegroups.com>
References: <1163503825.406640.171740@m73g2000cwd.googlegroups.com>
Message-ID: <ejcafm$e0t$1@upsn250.cri.u-psud.fr>

nic a ?crit :
> Hi all
>     Some years ago I saw a graphical class diagram generated by
> examining a python program. I *thought* that this was done with Boa
> Constructor, but I may be wrong. I've download a recent version of BC
> and can't find reference to this feature. Can anyone point me at other
> tools to do this?

Maybe pyreverse  :
http://www.logilab.org/view?rql=Any%20X%20WHERE%20X%20eid%202560


I have other links here:
http://www.limsi.fr/Individu/pointal/python.html#liens-metaprog


A+


From bearophileHUGS at lycos.com  Thu Nov 23 02:32:57 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 23:32:57 -0800
Subject: Abelson and Python
In-Reply-To: <1164258788.650158.118150@h54g2000cwb.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164258788.650158.118150@h54g2000cwb.googlegroups.com>
Message-ID: <1164267177.772466.316630@j44g2000cwa.googlegroups.com>

Paddy:
> Is the MIT course syndicated to Universities around America or something?
> (Is your name pronounced Beer-owe-file, or Bear-oh-fi-lee,

I don't know.


> I too have heard about the MIT course changing to Python elsewhere and
> wanted to know why it was talked about so much?

I don't know why others have talked so much about it, I have posted the
links here because those CS courses were very good, and probably
originally they seemed more like science finction. The most important
link I have shown is among the last ones, to the slides of the
lectures, that can probably be used to learn some other CS.

Bye,
bearophile



From Roberto.Bonvallet at cern.ch  Mon Nov 20 07:19:42 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Mon, 20 Nov 2006 12:19:42 +0000 (UTC)
Subject: a few extensions for the itertools
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <ejs6gu$g55$1@cernne03.cern.ch>

Mathias Panzenboeck wrote:
>>> forall(predicate, iterable, default=True) -> bool
>>>      Returns True, when for all elements x in iterable
>>>      predicate(x) is True. When the iterable is empty,
>>>      returns default.
>>>
>>>
>>> forany(predicate, iterable, default=False) -> bool
>>>      Returns True, when for any element x in iterable
>>>      predicate(x) is True. When the iterable is empty,
>>>      returns default.
>> 
>> 
>> I vaguely recall plans for all() and any() builtins -- perhaps for Python
>> 2.5?
>> 
> 
> all() and any() don't get predicate functions as arguments.

all(predicate(x) for x in iterable)
any(predicate(x) for x in iterable)

-- 
Roberto Bonvallet


From fredrik at pythonware.com  Thu Nov 16 06:48:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 12:48:44 +0100
Subject: Secure Python
In-Reply-To: <455c4d07@quokka.wn.com.au>
References: <mailman.219.1163646863.32031.python-list@python.org>	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>	<455c1665@quokka.wn.com.au>	<mailman.228.1163664606.32031.python-list@python.org>
	<455c4d07@quokka.wn.com.au>
Message-ID: <ejhj6u$49a$1@sea.gmane.org>

timmy wrote:

> maybe you should google "linux kernel limit" and you can prevent any 
> user/process maxing out your system

one would have thought that the phrase "apart from OS-specific stuff" 
might have meant that the OP wasn't asking for Linux-specific solutions.

</F>



From dave.opstad at monotypeimaging.com  Thu Nov  9 10:26:15 2006
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Thu, 09 Nov 2006 07:26:15 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
Message-ID: <dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>

Sorry, that should have been:

cdb += struct.pack(">L", skip)[1:]

Dave


From no-spam at no-spam-no-spam.invalid  Sat Nov  4 08:42:17 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sat, 04 Nov 2006 14:42:17 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <7xk62ct5pf.fsf@ruckus.brouhaha.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
Message-ID: <eii5br$f47$1@news.albasani.net>

Paul Rubin wrote:
> robert <no-spam at no-spam-no-spam.invalid> writes:
>>> I don't want to discourage you but what about reference
>>> counting/memory
>>> management for shared objects? Doesn't seem fun for me.
>> in combination with some simple locking (anyway necessary) I don't
>> see a problem in ref-counting.
>> If at least any interpreter branch has a pointer to the (root)
>> object in question the ref-count is >0. ----
>> Question Besides: do concurrent INC/DEC machine OP-commands execute
>> atomically on Multi-Cores as they do in Single-Core threads?
> 
> Generally speaking, no, the inc/dec instructions are not atomic.  You
> can do an atomic increment on the x86 using LOCK XCHG (or maybe LOCK
> INC is possible).  The thing is that the locking protocol that
> guarantees atomicity is very expensive, like 100x as expensive as an
> unlocked instruction on a big multiprocessor.  So yes, of course you
> could accomplish reference counting through locks around the ref
> counts, but performance suffers terribly.  The solution is to get rid
> of the ref counts and manage the entire heap using garbage collection.
> 
> For stuff like dictionary access, there are protocols (again based on
> LOCK XCHG) that don't require locking for lookups.  Only updates
> require locking.  Simon Peyton-Jones has a good paper about how it's
> done in Concurrent Haskell:
> 
>   http://research.microsoft.com/~simonpj/papers/stm/stm.pdf
> 
> This is really cool stuff and has found its way into Perl 6.  I'd like
> to see Python get something like it.

Thats really interesting. Do expect this to remove once the GIL from Python? As dict-accesses (which are also must-be-atoms here) compose a major Python CPU load, the 100x costing instructions would probably put a >30% burden on Pythons overall speed.

A lock-protected possibilty to use multiple well separated Interpreters by tunneling objects will probably still be a most effective solution without speed costs.
The problem of singleton object's refcount (None, "", 1,2,3...), which MvL mentioned, is the main concern as far as I've understood. 
The locking of Python core global resources (files etc.) can be done with litte effort.
The globals of extension modules are not really critical, as in the typical applications the tunnel method is mainly used for limited number crunching and as programmer you are well aware of multi-interpreter-unfit modules (until they final become mature). There could be also a special import method to duplicate extension data as workaround.

The singletons refcount could be fix-reset to MAXINT/2 at refcreation-time (or GC or ..) or so to freeze them quiet for ever.

(Mutable (why?)) exception types could be doubled in same style as normal python modules, or they could be rendered read-only. Thrown Exceptions will not cross the border. ( Think, the fact that "Exception.x=5" is possible is more an artefact than intended )


robert


From XX.XmcX at XX.XmclaveauX.com  Fri Nov  3 16:32:40 2006
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 03 Nov 2006 22:32:40 +0100
Subject: Programming Language that is Spreadsheet/Table Based
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
Message-ID: <mn.1d487d6b6ae99d64.46195@XX.XmclaveauX.com>

Hi!

You can expand VBA/Excel with Python, with Pywin32 for to make a 
dynamic COM server.

-- 
@-salutations

Michel Claveau




From svein at seldal dot com  Wed Nov  8 14:16:44 2006
From: svein at seldal dot com (Svein Seldal)
Date: Wed, 08 Nov 2006 20:16:44 +0100
Subject: Delivering data to python from a c-thread
In-Reply-To: <mailman.1919.1163012125.11739.python-list@python.org>
References: <JYmdnYWSXs0nfczYRVnzvQ@telenor.com>	<mailman.1908.1163004405.11739.python-list@python.org>	<F9Gdnbl3uKqPhc_YRVnzvQ@telenor.com>
	<mailman.1919.1163012125.11739.python-list@python.org>
Message-ID: <f8ydnSVm35iWsM_YRVnzvA@telenor.com>

Steve Holden wrote:

> OK. I was just thinking that, with Python threads, communication using 
> Queue.Queue is thread-safe and will handle the GIL, so that way you only 
> have the problem of how to synchronize your C code when it receives the 
> callback from the Python thread.

The python internal thread-safe problem is under control. I'm using 
twisted, so it already provide me with a thread-synchronization 
mechanism (the reactor.callFromThread() ).

The issue is rather the C sync-ing. I'm kind of new to multithreaded 
(pthreads) programming, so I'm not quite sure what exists of 
functionality and functions. So this is how I think of doing it:

Setup a mailbox or similar where the producing thread will deliver its 
message. This call to the mailbox should block until the consumer thread 
has received the message. My py thread will repeatedly call my 
C-handler. This C handler will wait (forever) for incoming messages from 
the producer. This should work, right?  I mean, this could even be 
implemented with flags/semaphores and let the data be transferred over 
ordinary common global variables.

Francly, I think the best solution would be to be able to call py from 
two independent c-treads!

Regads,
Svein Seldal


From sturlamolden at yahoo.no  Sat Nov 18 15:40:57 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Nov 2006 12:40:57 -0800
Subject: please help me choose a proper gui library.
In-Reply-To: <mailman.425.1163871854.32031.python-list@python.org>
References: <mailman.425.1163871854.32031.python-list@python.org>
Message-ID: <1163882457.430161.140570@h54g2000cwb.googlegroups.com>


krishnakant Mane wrote:

> now My question is which gui toolkit should I choose?

It's a matter of taste. I would recommend PyGTK (yes it runs on
Windows). You can design the GUI in a fly with GLADE, and import it as
an XML resource in Python with one single line of code. It will save
you an awful lot of work; all you have to code is the event handlers.
Additionally you get the GUI design out of you code, which makes
maintenance a lot easier. You can redesign the GUI without changing or
breaking your existing Python code.



From pavlovevidence at gmail.com  Fri Nov 24 07:45:35 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 24 Nov 2006 04:45:35 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.669.1164359437.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
	<mailman.669.1164359437.32031.python-list@python.org>
Message-ID: <1164372335.362554.301780@j44g2000cwa.googlegroups.com>

Shane Hathaway wrote:
> Just avoid the term "free as in freedom", since the Free
> Software Foundation has assigned that phrase a very specific meaning.

Bah.  FSF is not an arbiter of the language.  People whose idea of
"free" differs from FSF's still need to differentiate it from the
monetary sense of the word free.

Carl Banks



From fredrik at pythonware.com  Wed Nov  1 08:46:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 14:46:40 +0100
Subject: Remote Objects via CGI?
In-Reply-To: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>
References: <1162388371.898076.267400@e64g2000cwd.googlegroups.com>
Message-ID: <eia8g0$bt5$1@sea.gmane.org>

kpd wrote:

> Has anyone seen a method of doing this using CGI or FastCGI instead of
> a deamon?   I'm not worried about performance for this application, but
> I do have constraints on long-running processes.
> 
> I do want to stay away from XmlRpc if possible.

because?

</F>



From paul at boddie.org.uk  Fri Nov  3 11:41:13 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Nov 2006 08:41:13 -0800
Subject: Tools for Java/Python scripting
References: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>
	<mailman.1722.1162571941.11739.python-list@python.org>
Message-ID: <1162572073.566483.192510@m73g2000cwd.googlegroups.com>

s... at pobox.com wrote:
> steve> http://wiki.python.org/moin/Java_Scripting
>
> Renamed to "JavaScripting".

You might want to coordinate this amongst yourselves: the original page
is still being edited whilst the new one remains as a snapshot of the
original page at the point of renaming.

Paul



From horpner at yahoo.com  Thu Nov  2 09:20:46 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 2 Nov 2006 15:20:46 +0100
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<1162413609.110488.277850@e64g2000cwd.googlegroups.com>
Message-ID: <slrnekjvo9.h8.horpner@FIAD06.norwich.edu>

On 2006-11-01, Paddy <paddy3118 at netscape.net> wrote:
> Neil Cerutti wrote:
>> The Glk API (which I'm implementing in native Python code)
>> defines 120 or so constants that users must use. The constants
>> already have fairly long names, e.g., gestalt_Version,
>> evtype_Timer, keycode_PageDown.
>>
>> Calls to Glk functions are thus ugly and tedious.
>>
>>     scriptref = glk.fileref_create_by_prompt(
>>             glk.fileusage_Transcript | glk.fileusage_TextMode,
>>             glk.filemode_WriteAppend, 0)
>>
>> Please give me some good style advice for this situation.
>>
>> I know some modules are designed to be used as 'from XXX import
>> *'. Since the Glk API is heavily influenced by its inception in
>> C this might not be a huge problem. All the functions in the API
>> have glk_ prepended, since C has no namespaces. I think it makes
>> sense to stick the glk_'s back on the functions and instruct
>> users to 'from Glk import *', but I know it doesn't conform with
>> Python practice, and Python has plenty of modules that were
>> originally designed in C, but don't insist on polluting the
>> global namespace.
>>
>> Would it better to use strings instead? Some Python builtins use
>> them as a way to avoid creating of global constants.
>>
>>     scriptref = glk.fileref_create_by_prompt('Transcript+TextMode',
>>             'WriteAppend', 0)
>>
>> Parsing the combinable bitfield contants might be slowish,
>> though.
>>
>> Thanks for taking the time to consider my question.
>
> I'd check the C code to first see if I could extract the C
> constant definitions and automatically   convert them into
> Python names vvia a short program. That way, I'd remove any
> transcription errors.

That's an excellent idea. I've moved all the constants to a
seperate file; it should be possible to write a Python script to
generate it from glk.h. If I ultimately decide to use strings
instead of identifiers, the program would generate a big
dictionary declaration instead of the Constants() instances.

> I favour the constants class mentioned by others , but would
> not mess with any of the long constant names as it helps those
> who know the original C, and also helps when users need to rely
> on original C documentation.

I have the luxury of stylistically modifying the C API to suit
Python and Python programmer's needs. I will have to take on the
burden of documenting the Python GLK API.

-- 
Neil Cerutti


From rvernica at gmail.com  Fri Nov 17 13:29:11 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 10:29:11 -0800
Subject: remove a list from a list
Message-ID: <ejkv1u$ajf$1@sea.gmane.org>

Hi,

I have the following problem:

I have a list like
   e = ['a', 'b', 'e']
and another list like
   l = ['A', 'a', 'c', 'D', 'E']
I would like to remove from l all the elements that appear in e 
case-insensitive. That is, the result would be
   r = ['c', 'D']

What is a *nice* way of doing it?

Thanks a lot,
Ray



From paul at boddie.org.uk  Thu Nov 16 18:58:42 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 15:58:42 -0800
Subject: pyj file extension
References: <mailman.250.1163678962.32031.python-list@python.org>
	<4s33qhFt1kjcU1@mid.uni-berlin.de>
Message-ID: <1163721522.786169.100610@m73g2000cwd.googlegroups.com>

Diez B. Roggisch wrote:
>
> http://www.crazy-compilers.com/decompyle/
>
> But only up to python 2.3. No idea if that is sufficient & if there is
> anything newer out there.

Usual service message: sources available from here...

http://packages.debian.org/unstable/source/decompyle

Paul



From markacy at gmail.com  Tue Nov 14 09:27:20 2006
From: markacy at gmail.com (markacy)
Date: 14 Nov 2006 06:27:20 -0800
Subject: matplotlib and zope
Message-ID: <1163514440.091404.219060@e3g2000cwe.googlegroups.com>

Hello All,

  I've been using zope and matplotlib for some time now, and I want to
connect them. I'am using the example code from page:
http://www.scipy.org/Cookbook/Matplotlib/Matplotlib_and_Zope ,
but whenever I try to import matplotlib, and/or pylab packages i get
this error from zope:

Error Type: RuntimeError
Error Value: '/' is not a writable dir; you must set environment
variable HOME to be a writable dir

Have You got any ideas, on what might go wrong?
Is it a problem with matplotlib itself? Have anyone had the same issue?

 I'am using matplotlib 0.87.4, and zope 2.9.5 with python 2.4.3 on
gentoo linux box.

Thanks in advance for any help.

Marek Szczypinski

Here is the traceback:

Traceback (innermost last):
  Module ZPublisher.Publish, line 115, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 41, in call_object
  Module Products.ExternalMethod.ExternalMethod, line 59, in
manage_addExternalMethod
  Module Products.ExternalMethod.ExternalMethod, line 111, in __init__
  Module Products.ExternalMethod.ExternalMethod, line 134, in
manage_edit
  Module Products.ExternalMethod.ExternalMethod, line 141, in
getFunction
  Module App.Extensions, line 148, in getObject
   - __traceback_info__:
('/var/lib/zope/zope-markacy/Extensions/mpl.py', 'mpl')
  Module /var/lib/zope/zope-markacy/Extensions/mpl.py, line 1, in ?
  Module None, line 1011, in ?
  Module None, line 968, in rc_params
  Module None, line 914, in matplotlib_fname
  Module None, line 273, in wrapper
  Module None, line 324, in _get_configdir
RuntimeError: '/' is not a writable dir; you must set environment
variable HOME to be a writable dir



From grahamd at dscpl.com.au  Wed Nov 22 19:29:51 2006
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 22 Nov 2006 16:29:51 -0800
Subject: Python, WSGI, legacy web application
References: <mailman.615.1164238782.32031.python-list@python.org>
Message-ID: <1164241791.372210.103330@b28g2000cwb.googlegroups.com>


Ben Finney wrote:
> Howdy all,
>
> I'm working on a web application that is starting to gain a lot of
> back-end code written in Python. However, all the current interface
> code is written in legacy PHP. I'd like to slowly introduce new
> features as Python WSGI programs.
>
> Is it possible to write a Python WSGI program that talks to a PHP
> program as its "back end"? Where can I find out how to do this,
> preferably with examples?
>
> The ideal here is to keep all the existing code as is, but write
> little or no new PHP code. Instead, iteratively change the interface,
> replacing pieces of the monolithic legacy PHP interface with modular
> WSGI programs over time.

Look at mod_python for Apache. If you use it correctly you can on a
page by page basis as need be, replace the existing PHP pages with
equivalents written using Python. You could do this by programming
right at the level of mod_python, or again, if done right by using WSGI
on top of mod_python. If you need to maintain compatibility of URLs,
you could even do things so that even though URLs use .php, that it
maps to Python code underneath, thus easing any transition.

If you are interested in this path, the mod_python mailing list may be
a good place to go to discuss the mod_python aspects of this. The
mod_python mailing list details are on the mod_python web site at
www.modpython.org.


Graham



From e0427417 at student.tuwien.ac.at  Mon Nov 20 10:41:04 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 20 Nov 2006 16:41:04 +0100
Subject: a few extensions for the itertools
In-Reply-To: <ejs6gu$g55$1@cernne03.cern.ch>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
	<pan.2006.11.19.21.51.17.695877@REMOVE.THIS.cybersource.com.au>
	<45616cf4$0$10578$3b214f66@tunews.univie.ac.at>
	<ejs6gu$g55$1@cernne03.cern.ch>
Message-ID: <4561cc31$0$11610$3b214f66@tunews.univie.ac.at>

Roberto Bonvallet wrote:
> 
> all(predicate(x) for x in iterable)
> any(predicate(x) for x in iterable)
> 

Very true, but 2.4 is still very common and forall(perdicate,iterable) is less to write. ;)
(And haskell has both, to. all == and, forall == all, ...)

Well, but I think you are right. Don't reinvent the wheel, I guess.


	panzi


From bignose+hates-spam at benfinney.id.au  Thu Nov 16 22:18:12 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 17 Nov 2006 14:18:12 +1100
Subject: Printing/writing an integer to a file
References: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.com>
Message-ID: <878xiaep6z.fsf@benfinney.id.au>

PS <mytempmailid at gmail.com> writes:

> Friends,

Please, don't send message bodies to public discussion forums in any
format other than plain text. HTML email in particular has wildly
differing implementations and renderings.

> I am new to python and did search on the web on how to achieve this:
> ( I am trying to append the line numbers to all the lines of a file for now)
> Thanks!!
> =================================================
> import os, sys
> fileName = os.path.join("C:", "temp", "x1.txt")
> fileobject = open(fileName, 'r')
> outputDir = "C://temp//"
> linenumber = 0
> fileName1 = outputDir + " x2.txt"

You've used 'os.path.join' corretly above; you should use that any
time you want to compose a file path.

    output_dir = "C://temp//"
    out_file_name = os.path.join(output_dir, "x2.txt")

> fileobject1 = open(fileName1, 'w')
> while (1):
> ??? L = fileobject.readline()
> ??? if L=="":
> ??????? print "**Done"
> ??????? break

A file object is iterable, returning a line of text each time. This
means you don't need to manually loop and extract each line; you can
write this loop as:

    out_file = open(out_file_name, 'w')
    for in_line in in_file:
        # process the line

> ??? linenumber += 1
> ??? fileobject1.write (ln)

The function call syntax doesn't allow a space between the function
name and the opening parenthesis.

You are referencing 'ln' without ever defining it. Presumably you mean
to use 'linenumber'.

          linenumber += 1
          out_file.write(linenumber)

> ??? fileobject1.write(":: "+ L)
> ???
> fileobject1.close()
> =============================================================

Wrapping all this advice up::

    import os
    import sys

    in_file_name = os.path.join("C:", "temp", "x1.txt")
    in_file = open(in_file_name, 'r')
    out_dir = "C://temp//"
    out_file_name = os.path.join(out_dir, "x2.txt")
    out_file = open(out_file_name, 'w')

    linenumber = 0
    for in_line in in_file:
        linenumber += 1
        out_file.write(linenumber)
        out_file.write(":: " + in_line)

    out_file.close()
    in_file.close()
    print "**Done"

An improvement would be to use string formatting to construct the
output line:

    linenumber = 0
    for in_line in in_file:
        linenumber += 1
        out_line = "%d:: %s" % (linenumber, in_line)
        out_file.write(out_line)

This also means you're one easy step away from padding the line number
to a minimum width::

        out_line = "%06d:: %s" % (linenumber, in_line)

-- 
 \     "I must say that I find television very educational. The minute |
  `\   somebody turns it on, I go to the library and read a book."  -- |
_o__)                                                     Groucho Marx |
Ben Finney



From no-spam at no-spam-no-spam.invalid  Fri Nov 24 10:53:56 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 16:53:56 +0100
Subject: fast listdir & stat
In-Reply-To: <1164382934.355278.154350@45g2000cws.googlegroups.com>
References: <ek70j3$nqp$1@news.albasani.net>
	<1164382934.355278.154350@45g2000cws.googlegroups.com>
Message-ID: <ek74io$vhb$1@news.albasani.net>

wittempj at hotmail.com wrote:
> robert wrote:
>> I want to get the files and sizes and times etc. stats of a dir fast.
>> os.listdir & iterating with os.stat seems not to run at optimal speed for network folders. Is there a faster possibility? (both for Win & *nix ; best platform independent)
>>
> 
> An alternative is to work with os.walk() it returns a generator  - see
> http://docs.python.org/lib/lib.html, and os.path.getsize(),
> os.path.gettmtime() - see http://docs.python.org/lib/module-os.path.html

would be even slower - 2 or 3 (network) calls for each file. os.walk just uses listdir. 

Robert


From timothy at open-networks.net  Thu Nov 16 06:40:11 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 16 Nov 2006 21:40:11 +1000
Subject: Secure Python
In-Reply-To: <pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
Message-ID: <455c4d9b@quokka.wn.com.au>

Steven D'Aprano wrote:
> On Thu, 16 Nov 2006 17:44:37 +1000, timmy wrote:
> 
> 
>>congraulations you have discovered loops and their misuse
> 
> 
> Did you have a point in your utterly inane comment, or did you just want
> to see your name on Usenet?
> 
> In any case, it isn't just "loops" that are dangerous.
> 
> print 2**512**512
> 
> No loop there, but it will operate as a lovely DoS attack if you run it.
> 
> The Original Poster is suggesting running UNTRUSTED code. That means you
> have to assume that it will be actively hostile, but even if it isn't
> deliberately hostile, there will be bugs which the developer can't control.
> 
> He wants to run this untrusted (hostile or buggy or both) code in an
> environment where it can't do bad things. "Bad things" include Denial of
> Service attacks. So, Timmy, let's hear your brilliant scheme for
> preventing DoS attacks when running hostile code in Python.
> 
> 
> 

as posted before, linux kernel limit.

then you and your users can go as crazy as you want and you won't take 
out your system.

maybe you should think a little more before going on the attack like that.


From steve at holdenweb.com  Tue Nov 14 12:08:56 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Nov 2006 17:08:56 +0000
Subject: Decimal() instead of float?
In-Reply-To: <1163511997.4675.88.camel@pepper>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper>
Message-ID: <4559F828.7070704@holdenweb.com>

Michael B. Trausch wrote:
> On Mon, 2006-11-13 at 03:45 -0600, Steve Holden wrote:
>> Michael B. Trausch wrote:
>> > Is there a way to use Decimal() by default in Python instead of float?  
>>
>> No. You'll just have to be explicit.
>>
> 
> That's kinda what I figured.  :-(
> 
> It /would/ be nice to see Decimal() become the default.  I cannot 
> imagine why in an otherwise "human enough" language, math wouldn't be 
> included in that without going out of one's way to do it.  :-)
> 
Speed has a lot to do with it. Have you timed some decimal operations 
against their floating-point counterparts? It might be possible to build 
a version of Python that used decimal instead of floating-point but it 
certainly wouldn't be trivial: consider the use of C language libraries 
that know nothing of Python's decimal representation.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden


From jscrerar at compuserve.com  Fri Nov 24 12:19:41 2006
From: jscrerar at compuserve.com (Jim)
Date: 24 Nov 2006 09:19:41 -0800
Subject: How do I access a main frunction from an import module?
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
	<4sol7hF10ii6eU1@mid.individual.net>
Message-ID: <1164388781.646461.70740@j44g2000cwa.googlegroups.com>


Bjoern Schliessmann wrote:
> Jim wrote:
>
> > I have created an import module.  And would like to access a
> > function from the main script, e.g.,
>
> May I ask why? This style violates "normal" module philosophy.
>
> Regards,
>
>
> Bj?rn
>
> --
> BOFH excuse #307:
>
> emissions from GSM-phones

Application abc is designed as a complete module.  The user is to
script their own functions to work with application abc.
 
Thanks,
JIm



From jstroud at mbi.ucla.edu  Sat Nov  4 06:23:24 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 04 Nov 2006 11:23:24 GMT
Subject: Programming Language that is Spreadsheet/Table Based
In-Reply-To: <1162638585.016404.20270@m7g2000cwm.googlegroups.com>
References: <1162588208.533235.266100@k70g2000cwa.googlegroups.com>
	<k%V2h.4121$9v5.2149@newssvr29.news.prodigy.net>
	<1162626260.236167.157920@m73g2000cwd.googlegroups.com>
	<CAY2h.21661$TV3.1374@newssvr21.news.prodigy.com>
	<1162638585.016404.20270@m7g2000cwm.googlegroups.com>
Message-ID: <MK_2h.1463$r12.237@newssvr12.news.prodigy.com>

Gerard Flanagan wrote:
> What about symmetric 'load' and 'iterrows' methods for the Table class:
> 
>     t2 = Table()
>     t2.load( t1.iterrows("LastName", "Age") )
> 
> def load(self, iterable):
>     '''expecting tuples'''
>     for lname, age in iterable:
>         self.append( lname, age )
> 
> def iterrows(self, *args):
>     '''returns a generator which itself returns tuples
>       filtered by the column names in *args (via
>       operator.itemgetter maybe?)'''
> 
> 
> There might be some value in comparing Microsoft's DataSet API.  IIRC,
> you typically have:
> 
> *UI* - DataView - DataSet - DataAdapter - *DATABASE*
> 
> A DataSet is a collection of DataTables and has a lot of DB/XML
> functionality and so on.  A DataView on the other hand is more
> lightweight and has mainly filtering and sorting functions and is
> designed to be bound to a GUI widget such as a DataGrid.
> 
> You might have something along the lines of:
> 
>    ds = DataSet()
>    # fill ds from datasource
>    dt_customers = ds.tables["customers"]
>    view = DataView( dt_customers )
>    view.rowfilter = "lastname LIKE 'A*' and Age < 60"
> 
> I'm not saying imitate this, but maybe some value in studying the
> OO-bondage approach.


Thank you, this is very good stuff to think about.

James


From johnjsal at NOSPAMgmail.com  Sat Nov  4 15:17:33 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 04 Nov 2006 15:17:33 -0500
Subject: what's the difference between these two methods? (aka,   why
	doesn't one of them work?)
In-Reply-To: <mailman.1700.1162524472.11739.python-list@python.org>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>	<eidlah$v0m$01$1@news.t-online.com>	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>	<1162502076.438629.289560@k70g2000cwa.googlegroups.com>	<mailman.1692.1162502583.11739.python-list@python.org>	<1162502862.141973.324040@h48g2000cwc.googlegroups.com>	<mailman.1693.1162503254.11739.python-list@python.org>	<454ab2e3$0$17722$c3e8da3@news.astraweb.com>
	<mailman.1700.1162524472.11739.python-list@python.org>
Message-ID: <454cf57c$0$17670$c3e8da3@news.astraweb.com>

Steve Holden wrote:

> Don't worry. It's sometimes difficult for the effbot to remember we 
> aren't all as fearsomely intelligent as it is. I think it does a 
> remarkably complete emulation of a human being:
> 
>    http://www.flickr.com/photos/30842681 at N00/152495923/
> 
> For what it's worth it's also amazingly helpful if you can ignore to 
> sometimes acerbic wit.
> 
> regards
>   Steve

Heh heh. Things wouldn't be the same without him...I mean "it".  :)


From Mythmon at gmail.com  Sat Nov 11 14:17:06 2006
From: Mythmon at gmail.com (Mythmon at gmail.com)
Date: 11 Nov 2006 11:17:06 -0800
Subject: Why does this code crash python?
Message-ID: <1163272625.991469.153870@i42g2000cwa.googlegroups.com>

I am trying to make a program that will basically simulate a chess
clock in python. To do this I have two threads running, one that
updates the currently running clock, and one that watches for a
keypress. I am using the effbot Console module, and that is where I get
the events for the keypresses. But when I press space it crashes
shortly after. The program stops, the Console closes, and windows says
that the program pythonw.exe has had an unexpected reason to shut down.
I am using python2.5.

If there is a simpler way to do this ( I tried without threads but had
some problems with the Console module giving me input right and still
letting the timer display count down ) I would like to know about it. I
am not a very good programmer, and don't have much experience with
python

note: A chess clock is two timers that count down from a set time, and
when you start one of the timer the other stops.

Code below:

import time
import Console
from threading import Thread

c = Console.getconsole()

turn = 0

class timer (Thread):
    def run ( self ):
        global turn
        oldTime = [time.time(), time.time()]
        timeLeft = [260, 260]

        go = True
        while go:
            newTime = time.time()
            timeLeft[turn] -= newTime - oldTime[turn]
            oldTime[turn] = newTime
            minutes = [str(int(timeLeft[0]//60)),
str(int(timeLeft[1]//60))]
            seconds = [str(timeLeft[0]%60)[0:5],
str(timeLeft[1]%60)[0:5]]

            if float(seconds[0]) < 10: seconds[0] = '0' +
seconds[0][:-1]
            if float(seconds[1]) < 10: seconds[1] = '0' +
seconds[1][:-1]

            c.text(3,3,minutes[0] + ':' + seconds[0])
            c.text(12,3,minutes[1] + ':' + seconds[1])

            time.sleep(.1)

class eventMonitor (Thread):
    def run ( self ):
        global turn
        go = True
        while go:
            event = c.peek()
            if event != None:
                c.get()
                if event.type == 'KeyPress':
                    if event.keycode == 32:
                        if turn == 1: turn = 0
                        if turn == 0: turn = 1
                    c.text(10,20,'1')

timer().start()
eventMonitor().start()



From ccosse at gmail.com  Mon Nov 13 12:27:55 2006
From: ccosse at gmail.com (ccosse at gmail.com)
Date: 13 Nov 2006 09:27:55 -0800
Subject: Research Master 0.1 (GPL/Python)
Message-ID: <1163438875.744584.52060@m73g2000cwd.googlegroups.com>

ResearchMaster has been designed to simplify management of research
literature. It is a GUI interface to a system of folders and records.
Each record contains notes, meta info and BibTex info about an
associated file.  Instances of the single copy of a record can occur
throughout the folder system, as specified through a membership list.
A single button creates a recursive bibliography of all records
containing BibTex information which are children of the currently
selected parent node. One click launching of files by an associated
application is also supported. A tutorial document is included.

http://www.asymptopia.org



From antroy at gmail.com  Wed Nov 22 04:44:06 2006
From: antroy at gmail.com (Ant)
Date: 22 Nov 2006 01:44:06 -0800
Subject: Pyparsing Question.
Message-ID: <1164188646.047093.182390@f16g2000cwb.googlegroups.com>

I have a home-grown Wiki that I created as an excercise, with it's own
wiki markup (actually just a clone of the Trac wiki markup). The wiki
text parser I wrote works nicely, but makes heavy use of regexes, tags
and stacks to parse the text. As such it is a bit of a mantainability
nightmare - adding new wiki constructs can be a bit painful.

So I thought I'd look into the pyparsing module, but can't find a
simple example of processing random text. For example, I want to parse
the following:

"Some random text and '''some bold text''' and some more random text"

into:

"Some random text and <strong>some bold text</strong> and some more
random text"

I have the following as a starting point:

from pyparsing import *

def parse(text):
    italics = QuotedString(quoteChar="''")

    parser = Optional(italics)

    parsed_text = parser.parseString(text)


print parse("Test this is '''bold''' but this is not.")

So if you could provide a bit of a starting point, I'd be grateful!

Cheers,



From fang.fang2003 at gmail.com  Thu Nov 30 13:13:04 2006
From: fang.fang2003 at gmail.com (Grace Fang)
Date: 30 Nov 2006 10:13:04 -0800
Subject: extremely slow array indexing?
In-Reply-To: <1164908923.363433.43770@l39g2000cwd.googlegroups.com>
References: <1164907021.765969.129280@80g2000cwy.googlegroups.com>
	<1164908923.363433.43770@l39g2000cwd.googlegroups.com>
Message-ID: <1164910384.439600.116900@h54g2000cwb.googlegroups.com>

Hi will,Thanks for your reply. The simplified code is as follows, and
you can run it if you like. It takes 7 seconds to process 1000 rows,
which is tolerable, but I wonder why it takes so long, because I also
did one for loop through all of the same rows without accessing array,
which only takes 1 sec to process 1000 rows.  Isn't vectorized
operation supposed to run very quickly?

from numpy import *
componentcount = 300000
currSum = zeros(componentcount)
row = zeros(componentcount) #current row
rowcount = 50000
for i in range(1,rowcount):
    row[:] = 1
    currSum = currSum + row;

> Array indexing is unlikely to be the culprit. Could it not just be
> slow, because you are processing a lot of data? With numbers those big
> I would expect to have enough time to go make a coffee, then drink it.
>
> If you think it is slower than it could be, post more code for
> optimization advice...
> 
> Will McGugan
> --
> http://www.willmcgugan.com



From spe.stani.be at gmail.com  Thu Nov 30 06:44:42 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 30 Nov 2006 03:44:42 -0800
Subject: SPE refuses.
In-Reply-To: <mailman.878.1164885783.32031.python-list@python.org>
References: <mailman.846.1164826327.32031.python-list@python.org>
	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>
	<mailman.857.1164838885.32031.python-list@python.org>
	<1164842145.465496.135210@h54g2000cwb.googlegroups.com>
	<mailman.875.1164880214.32031.python-list@python.org>
	<1164882842.357607.75440@16g2000cwy.googlegroups.com>
	<mailman.878.1164885783.32031.python-list@python.org>
Message-ID: <1164887082.577409.161650@h54g2000cwb.googlegroups.com>

which version of SPE are you using? You'll need SPE 0.8.3.c for
wxPython 2.7 I've fixed this bug already in the latest version.

http://prdownload.berlios.de/python/SPE-0.8.3.c-wx2.6.1.0-no_setup.zip

Stani

On 30 nov, 12:23, Thomas Ploch <Thomas.Pl... at gmx.net> wrote:
> SPE - Stani's Python Editor schrieb:
>
> > On 30 nov, 10:50, egbert <egbert.bouw... at hccnet.nl> wrote:
> >> On Wed, Nov 29, 2006 at 03:15:45PM -0800, SPE - Stani's Python Editor wrote:> Do you have python-wxversion installed?
>
> >>> $sudo apt-get install python-wxversionThat helped. But why isn't it included in the wxPython download ?
> > I was surprised as well. I filed a bug report at debian MOTU that spe
> > depends as well on python-wxversion, so that it is automatically
> > installed together with spe in the future.
>
> >> Anyway, the first screen looks great. I will explore spe.
> >> Thanks.
> > You're welcome!
>
> > Staniell, when reading these posts about SPE, I wanted to try it as well. I
> am running the newest version of wxpython with python2.4. I installed
> it, all went fine with the setup.py script.
>
> When I tried to open the program, a window appears for about a second,
> displaying a traceback.
>
> So I ran the SPE.py debug tool as you have recommended earlier.
>
> here's the output:
>
> Spe is running in debugging mode with this configuration:
> - platform  : darwin
> - python    : 2.4.4
> - wxPython  : 2.7.1.3.
> - interface : <default>
> - encoding  : mac-roman
>
> Launching application...
> Create: Framework: menu.
> Create: Framework: toolbar.
> Create: Framework: statusbar.
> Traceback (most recent call last):
>   File "SPE.py", line 209, in ?
>     style           = style)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 1278, in __init__
>     wx.App.__init__(self,redirect=not debug)
>   File
> "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/_core.py",
> line 7480, in __init__
>     self._BootstrapApp()
>   File
> "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/_core.py",
> line 7080, in _BootstrapApp
>     return _core_.PyApp__BootstrapApp(*args, **kwargs)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 1297, in OnInit
>     style   = self.style,
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 801, in __init__
>     Parent.__init__(self,app=app,page=page,**options)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 595, in __init__
>     parentFrame     = self,
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 325, in __init__
>     self.__statusBar__()
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/sm/wxp/smdi.py",
> line 417, in __statusBar__
>     self.statusBar = self.app.StatusBar(parent=self,id=wx.ID_ANY)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
> line 727, in __init__
>     self.throbber   = Throbber(self,'throbber_still.gif')
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
> line 733, in __init__
>     GIFAnimationCtrl.__init__(self,statusBar,-1,info.imageFile(fileName))
>   File
> "//Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/wx-2.7.1-mac-unicode/wx/animate.py",
> line 242, in __init__
>     self.LoadFile(filename)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/_spe/Menu.py",
> line 746, in LoadFile
>     if fileName != self._fileName and not self._running:
> AttributeError: 'Throbber' object has no attribute '_fileName'
> 
> Thanks for any help.
> Thomas



From steve at REMOVE.THIS.cybersource.com.au  Fri Nov 24 18:41:04 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 25 Nov 2006 10:41:04 +1100
Subject: Access to variable from external imported module
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.685.1164390261.32031.python-list@python.org>
	<1164393677.496060.174120@f16g2000cwb.googlegroups.com>
	<mailman.690.1164404495.32031.python-list@python.org>
Message-ID: <pan.2006.11.24.23.40.53.414145@REMOVE.THIS.cybersource.com.au>

On Fri, 24 Nov 2006 16:56:58 -0500, jim-on-linux wrote:

> Correct but when writing one must be clear.

[jaw drops]

Given the number of typos your posts include, the mock accent, the
nonsensical sentences, the annoying hard-to-read coding conventions, and
the sheer number of grammatical errors in your sentences, do you have any
idea of the irony of that statement?

No, I imagine you don't.

Oh, and don't flatter yourself that you're the Old Man of Programming,
compared to all the young whipper snappers on this list who, quote,
"wern't even a gleem in their fathers eye". Many of us have been around
quite a while, some of us even remember that there was a computer market
before Bill Gates went dumpster-diving for source-code for a BASIC
interpreter, and even if we weren't, there is nothing to be proud of using
1970s programming style in 2000s programming languages.


-- 
Steven.



From meyer at acm.org  Fri Nov 24 12:03:56 2006
From: meyer at acm.org (Andre Meyer)
Date: Fri, 24 Nov 2006 18:03:56 +0100
Subject: synching with os.walk()
In-Reply-To: <1164385629.462106.106120@j72g2000cwa.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164385629.462106.106120@j72g2000cwa.googlegroups.com>
Message-ID: <7008329d0611240903p6b3449fer494fcb333e9d245d@mail.gmail.com>

That sounds like a good approach.

On 24 Nov 2006 08:27:09 -0800, Paddy <paddy3118 at netscape.net> wrote:
>
>
> Andre Meyer wrote:
>
> > Hi all
> >
> > os.walk() is a nice generator for performing actions on all files in a
> > directory and subdirectories. However, how can one use os.walk() for
> walking
> > through two hierarchies at once? I want to synchronise two directories
> (just
> > backup for now), but cannot see how I can traverse a second one. I do
> this
> > now with os.listdir() recursively, which works fine, but I am afraid
> that
> > recursion can become inefficient for large hierarchies.
> >
> > thanks for your help
> > Andr?
>
> Walk each tree individually gathering file names relative to the head
> of the tree and modification data.
>
> compare the two sets of data to generate:
> 1. A list of what needs to be copied from the original to the copy.
> 2. A list of what needs to be copied from the copy to the original
>
> Do the copying.
>
> |You might want to show the user what needs to be done and give them
> the option of aborting after generating the copy lists.
>
> - Paddy.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From gagsl-py at yahoo.com.ar  Wed Nov  8 16:29:25 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 08 Nov 2006 18:29:25 -0300
Subject: Is there a commas-in-between idiom?
In-Reply-To: <slrnel39n2.9hk.news@datatailors.xs4all.nl>
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
	<slrnel39n2.9hk.news@datatailors.xs4all.nl>
Message-ID: <7.0.1.0.0.20061108181734.05a59ee8@yahoo.com.ar>

At Wednesday 8/11/2006 16:51, Peter van Kampen wrote:

>"""
>A = B = [] # both names will point to the same list
>"""
>
>I've been bitten by this once or twice in the past, but I have always
>wondered what it was useful for? Can anybody enlighten me?

As an optimization, inside a method, you can bind an instance 
attribute and a local name to the same object:

     def some_action(self):
         self.items = items = []
         // following many references to self.items,
         // but using items instead.

Names in the local namespace are resolved at compile time, so using 
items is a lot faster than looking for "items" inside self's 
namespace each time it's used.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From lycka at carmen.se  Wed Nov 29 13:26:17 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 29 Nov 2006 19:26:17 +0100
Subject: OODB vs RDBMS
In-Reply-To: <4se3omFv6reaU1@mid.individual.net>
References: <4se3omFv6reaU1@mid.individual.net>
Message-ID: <ekkjca$bi9$1@wake.carmen.se>

Thomas Guettler wrote:
> Hi,
> 
> most of the time I use ZODB/Durus to store my data. 
> 
> I like it, but I know that it has some weaknesses:
> - only accesible from python
> - I need to code your indexes for fast searching yourself.

There are other features of relational database systems
that I find much more relevant than those, but then I don't
know what your use case is. For high performance, mission
critical, multi-user database systems, where many simultaneous
users actually do fine grained data manipulation, I don't think
there is any competition. Also, I don't know any other solution
that lets you do serious tuning without code changes. Even if the
application is the same, data size and usage patterns might lead
to vastly different performance. Being able to speed up some
operation on the expense of some other operations might be just
the right thing for a certain installation at a certain time.
This can be more or less automatic, depending on your brand and
version of RDBMS.

For a non-critical, single-user system without huge amounts of
data in a structure that fits the relational model, it might not
be worth the effort.

> I think about using a RDBMS for the next project. What I don't like
> about RDBMS: If you need a list of values you need to create a new
> table. Example: If you want to store several email addresses of one
> customer, you need to create a new table.

I think this is a tiny thing when you look at the big picture.
I don't know a lot about the PostgreSQL extensions, but the way
things work in relational database has proven to work very well
for quite some time. Obviously, OODBMS's haven't made any huge
impact, despite two decades of efforts.

The "impedance mismatch" between OO programming and relational
databases is annoying, but it's something we have to (and can)
deal with.

> Since the namespace if tablenames is flat, you soon have so many
> tables, that it is hard to browse them.

The tablename namespace is not flat in SQL. Where did you get this
from? Although not implemented in every RDBMS, the SQL standard has
the concept of a schema, and every table should belong to a schema.
For instance Oracle lacks schemata, but more or less makes up for it
by through the way it implements users. (Tables are owned by users.)

There's just this two level structure though, no abitrary hierarchy.

> Postgres has extensions which allows you to store arrays in a column. Is
> this supported by the python binding? Are there other databases which
> support this?

I don't know about the first question, but regarding the second, none
of the popular ones do as far as I know. PostrgeSQL is a fine RDBMS
though.

By the way, a database is a collection of data, not some software.

> Are there OR-mappers (object relational mappers) which support lists in
> a column?

I think they do, but having a separate class for the email addresses
(if we continue with your example above) has its advantages too. If
the customer has several email addresses (and you feel a desire to
keep track of that) they are probably different in some ways. It's
e.g. likely that you should use one particular address as recipient
when you send mail, not just one at random, or all of them. You might
also realize than not only customers, but also other entities, such
as employees, sub-contractors and authorities have email addresses.
Actually, while you might get more tables due to the first normal
form, your tables might well get leaner, the total amount of columns
smaller, and your over-all datamodel more coherent.

> How is the unicode support of the python bindings to RDBMSs? I don't
> want to convert the results of a query to unicode myself.
> Can you insert unicode strings into a SELECT statement?

As far as I remember, all the bindings I tried returned unicode
objects from varchar and char fields, and always accepted them
as parameters for CHAR/VARCHAR fields.

Remember to always pass parameters properly. I.e. use e.g.
cur.execute("SELECT * FROM T WHERE C=?", col_value) rather than
something like cur.execute("SELECT * FROM T WHERE C="+col_value).
The former will prevent SQL injection attacks, remove the need
to worry about quoting and escaping, and also make performance
better in the major systems.


From cdroulers at hotmail.com  Wed Nov  8 15:01:04 2006
From: cdroulers at hotmail.com (Sefyroth)
Date: 8 Nov 2006 12:01:04 -0800
Subject: Problem getting a file pathname with tkFileDialog
In-Reply-To: <dso924-t7r.ln1@eskimo.tundraware.com>
References: <1163012468.055428.124690@h48g2000cwc.googlegroups.com>
	<dso924-t7r.ln1@eskimo.tundraware.com>
Message-ID: <1163016063.961485.224390@k70g2000cwa.googlegroups.com>

Thanks,

but I get this error when I try this.

UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in
position 12: ordinal not in range(128)

 I had encountered it with the askdirectory method as well. Is there an
easy way to bypass this?

Thanks again


Tim Daneliuk wrote:
> cdroulers at hotmail.com wrote:
> > Hello,
> > I am working on a school project that requires me to get the path of a
> > filename for future treatment.
> > I've tried getting a file with tkFileDialog.askopenfile.
> >
> >
> > ********************************************
> > import tkFileDialog
> > file = tkFileDialog.askopenfile()
> > print file
> > ********************************************
> >
> >
> > It prints the opened files stuff, but I just can not find how to get
> > that path as a string. I've searched around google and the present
> > group, and found no documentation on the file class used with
> > tkFileDialog. Does someone have a solution for that?
> >
> > Thank you
> >
> > Christian
> >
>
> How about:
>
> print file.name
>
>
>
> --
> ----------------------------------------------------------------------------
> Tim Daneliuk     tundra at tundraware.com
> PGP Key:         http://www.tundraware.com/PGP/



From grahamd at dscpl.com.au  Thu Nov  2 18:26:19 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 2 Nov 2006 15:26:19 -0800
Subject: is mod_python borked?
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <1162509979.221261.192440@m7g2000cwm.googlegroups.com>


walterbyrd wrote:
> I am considering python, instead of php, for web-application
> development. I often see mod_python.criticisized as being borked,
> broken, or just plain sucking.
>
> Any truth to any of that?

I replied to you over on the mod_python mailing list when you reposted
the question there, but I'll copy to here my response for the benefit
of others.

In answer to your question of whether mod_python is borked, the answer
is yes and no.

One sees various people complain about mod_python. In some cases their
claims are valid, but in other cases they are wrong and haven't
bothered to work out how it works. Even when their claims are valid,
they often don't understand the problem properly. To use mod_python
properly also means in a lot of cases understanding how Apache works,
which many are too lazy to do. For example, the difference between
SetHandler and AddHandler and what happens when MultiViews is enabled.

One of the biggest problems is that a lot of ISPs still use Apache 1.3
and so only mod_python 2.7.X is available on those platforms. This
version is quite old now and doesn't behave exactly the same as more
recent versions, yet people read the most recent documentation and
complain it doesn't work as they expect.

Even where people are using Apache 2.0 and thus can use newer versions
of mod_python, they sometimes use RedHat enterprise versions of Linux
which are stuck in a time warp with only 3.1.X versions of mod_python
available. Some of the other Linux distributions haven't been much
better until recently and with people refusing to compile from source
code and demanding RPMs, DEBs or other prepackaged releases are only
bringing it on themselves.

Version 3.2.X has been an improvement over older versions.
Significantly it fixed multithreading issues on Windows and with worker
MPM on UNIX. For publisher at least, it addressed some of the module
importer issues, but not all. It has also addressed some major memory
leaks.

So in summary, if you use the most recent version you are obviously
going to have the least problems. Many still use older versions though
and can't or will not upgrade. Even the current version has known
issues and you can get a feel for what is known by going through issues
at:

  http://issues.apache.org/jira/browse/MODPYTHON

In particular the number of separate issues which will be addressed in
3.3 is getting up towards 100. These aren't all bug fixes, with many
being new features and improvements. The most important change will be
the replacement of the module importer. For a lengthy description of
the problems with the module importer see:


http://www.dscpl.com.au/wiki/ModPython/Articles/ModuleImportingIsBroken

So, use an older version of mod_python and the answer to the question
of whether it is borked is mostly yes. Use the current version and
except for module importer issues, the answer is mostly no. With
version 3.3, the answer should hopefully be a strong no.

Graham



From fuzzyman at gmail.com  Tue Nov 28 13:52:34 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 28 Nov 2006 10:52:34 -0800
Subject: SPE (Stani's Python Editor) web site?
In-Reply-To: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
References: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
Message-ID: <1164739954.838343.199960@l12g2000cwl.googlegroups.com>


John DeRosa wrote:
> SPE's site (http://pythonide.stani.be/) has been inaccessible to me
> for at least a day.  Can anyone else get to it?
>
> I looked on Google and didn't see any new locations for SPE.  Has it
> recently moved to somewhere else?  I dimly recall a post by Stani
> wherein he said he might move the site, but I can't find it...
>

He posted a request for free hosting for the project. Looks like maybe
he didn't get it...

Fuzzyman
http://www.voidspace.org.uk/index2.shtml


> John



From gherron at islandtraining.com  Fri Nov  3 11:35:56 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Fri, 03 Nov 2006 08:35:56 -0800
Subject: ANN: SE 2.3. Available now
In-Reply-To: <454B3B49.6070702@vtxmail.ch>
References: <454B3B49.6070702@vtxmail.ch>
Message-ID: <454B6FEC.20709@islandtraining.com>

Frederic Rentsch wrote:
> A few Cheese Shop upload problems have been solved with the help of this 
> creative group. Thank you all!
>
> Version 2.2 beta should be phased out. It has a functional defect, 
> missing matches with a very low statistical probability. Version 2.3 has 
> this fixed.
>
>    Download URL: http://cheeseshop.python.org/pypi/SE/2.3
>   
As a matter of polite netiquette, a message like this really ought to
have a paragraph telling us what SE *is*.    (Unless it's a secret :-))

> A list of possible handling improvements is being made to be 
> incorporated in the next version, One major flaw of the interface design 
> came to light the other day when a user reported a non-functioning 
> Editor Object made with a file name. If the constructor cannot find the 
> file it records the fact in the object's log without making the user 
> aware that his Editor Object is incomplete or altogether devoid of 
> substitutions. His obvious conclusion is that the damn thing isn't 
> working right.
>    Compile errors should certainly be reported at compile time. The next 
> version will send all messages being logged also to stderr by default. 
> The thing to do with the current version, if it appears to malfunction, 
> is to inspect the log and the compiled substitutions.
>
>  >>> Editor = SE.SE ('operators.se')
>  >>> Editor.show_log ()
>
> Fri Nov 03 12:49:17 2006 - Compiler - Ignoring single word 
> 'operators.se'. Not an existing file 'operators.se'.
>
>  >>> Editor = SE.SE ('se/operators.se')   # path was missing
>  >>> Editor.show_log ()
>
> (Log is empty. All is well.)
>
>  >>> Editor.show (show_translators = 1)
>
> (snip)
>
> Single-Byte Targets
>     1: |<|->|LT|
>     2: |>|->|GT|
>
> Multi-Byte Targets
>     3: |&&|->|AND|
>     4: ||||->|OR|
>
> etc...
>
> The display makes definition errors conspicuous. Missing definitions 
> indicate malformed or redefined (overwritten) ones.
>
>
> Frederic
>
>
>   



From ed at leafe.com  Fri Nov 17 09:05:50 2006
From: ed at leafe.com (Ed Leafe)
Date: Fri, 17 Nov 2006 09:05:50 -0500
Subject: ANN: Dabo 0.7 released!
Message-ID: <9E5A562B-3D48-4243-A9C1-E1E20AF5EDD6@leafe.com>

	It's been a while since we've had the chance to take a breath and  
compile a release, but it's here! Dabo 0.7 is now official, and it is  
available for download on our download page: http://dabodev.com/download

	If you're not familiar with Dabo, it is the leading framework for  
building desktop applications in Python. You can get more information  
about Dabo on our website: http://dabodev.com

	There have been a bunch of changes and bugfixes; instead of  
including them here, you can see them at: http://svn.dabodev.com/dabo/ 
tags/dabo-0.7/ChangeLog

	We hope to have the 0.7 releases of the demo programs as well as the  
visual tools available in the next few days. Stay tuned for those  
announcements.

	One important thing to note: Dabo works with wxPython 2.6, but  
several of the changes in the wxPython 2.7 and 2.8 products break our  
code. We will be focusing on making Dabo work with these later  
wxPython versions in the coming weeks, but for now, you need to stick  
with 2.6.

-- Ed Leafe
-- http://leafe.com
-- http://dabodev.com





From mnations at gmail.com  Sat Nov 11 12:23:09 2006
From: mnations at gmail.com (Mudcat)
Date: 11 Nov 2006 09:23:09 -0800
Subject: Tkinter: How do I change the actual width of a widget?
In-Reply-To: <mailman.2090.1163232371.11739.python-list@python.org>
References: <1163201725.520487.176030@i42g2000cwa.googlegroups.com>
	<mailman.2090.1163232371.11739.python-list@python.org>
Message-ID: <1163265789.191532.5720@h48g2000cwc.googlegroups.com>

Fredrik Lundh wrote:

>
> look for "pack_propagate" on this page for one way to do it:
>
>      http://effbot.org/tkinterbook/button.htm
>
> </F>


Thanks!

I had actually seen this, but on the pythonware site where it looks
like this:

f = Frame(master, height=32, width=32)
    f.pack_propagate(0) # don't shrink
    b = Button(f, text="Sure!")
    b.pack(fill=BOTH, expand=1)

I guess somewhere along the way it became necessary to use the pack
function with propagate.As a result, I was having problems getting it
to work and thought I was doing something else wrong.

And I guess I also missed the fact that Tkinter doc updates are being
done on effbot. I just upgraded my python version after a long time,
and I'm finding out all kinds of interesting things.



From JohnRoth1 at jhrothjr.com  Thu Nov 30 09:39:30 2006
From: JohnRoth1 at jhrothjr.com (John Roth)
Date: 30 Nov 2006 06:39:30 -0800
Subject: Python language extension mechanism for Python 3000... Worth for
	PEP?
In-Reply-To: <mailman.879.1164887229.32031.python-list@python.org>
References: <mailman.879.1164887229.32031.python-list@python.org>
Message-ID: <1164897570.163260.318110@n67g2000cwd.googlegroups.com>


Petr Prikryl wrote:
> Do you think that the following could became PEP (pre PEP).
> Please, read it, comment it, reformulate it,...
>
> Abstract
>
>   Introduction of the mechanism for language extensions via
>   modules written using other languages. Extensions of
>   Python could be done via special interpreter extensions.
>   From Python sources, the special modules would look like
>   other modules, with the Python API (the key feature from
>   the Python interpreter's point of view). Inside the
>   special modules, special language features could be
>   implemented and would possibly be interpreted by a
>   different interpreter (the key feature to please those who
>   want to use some special extensions).
>
>   The goal could be summarized as extension of the idea of
>   writing modules in Python or in C languages. Other kind of
>   modules could be introduced. Then Python would work not
>   only as a glue for modules and utilities, but could also
>   be the glue for different interpreters.
>
>
> Motivation
>
>   Note: The idea emerged when looking at the video
>   http://video.google.com/videoplay?docid=-6459339159268485356
>   and when thinking about it. The sequences from it will be
>   referenced like [video 2:10 - 2:30]. I do not want to be
>   the one of the group of the "everybody is the language
>   designer" [video 25:47]. The goal is rather to bypas the
>   problem mentioned in [video 25:35 - 27:50].
>
>   There are doubts whether some features should be added to
>   Python 3000 or whether some features are to be removed.
>   The goal is to get rid of the obsolete features but the
>   contradictory goal is not to break the backward
>   compatibility. [video 7:00 - 7:30 - 8:10 - 8:45]
>
>   There are some group of users of Python with special
>   interests or with some special tastes for programming
>   styles.
>
>   For example, some users like functional programming
>   (lambda, reduce, map,...). They have expressed so
>   eloquently their wishes that the Python 3000 is not to
>   remove lambda. On the other hand, only the (current)
>   simple form of lambda expressions will remain. [video
>   41:38 - 43:34] Possibly, the unpleased "functional" people
>   would be pleased if they could write some modules with
>   more powerful lambda that would be interpreted by some
>   special extension of the Python language interpreter.
>
>   The new, requested special features used only by minority
>   of programmers (but not by the unimportant minority) could
>   be implemented outside the core of the Python interpreter.
>
>
> Rationale
>
>   To keep the (Python) language clean, it is a good idea to
>   simplify the syntax as much as possible -- if it does not
>   lead to the loss of the power.
>
>   Some languages are better for some tasks. There will
>   always be people that want to extend the core of the
>   language to support their wishes. The extension of the
>   language via special kinds of modules would not upset the
>   pure Pythonistas and will please "the pure
>   functional-languages followers", for example.
>
>   There already is something similar available inside the
>   Python interpreter: some modules are implemented in the C
>   language. The key idea is that they offer the same kind of
>   interface that the modules written in Python do.
>
>   In some sense, Python interpreter is not interested in how
>   the results from the function call are obtained (whether
>   the content of the module must be processed by the Python
>   interpreter or whether the binary code will do it). In
>   some sense, the module written in C can be seen as using
>   "no-interpreter extension".
>
>   The idea of the module implementation language could be
>   extended (generalized) from "Python or C" to "Python or C
>   or Python-extension". The "Python extension" would be
>   implemented and maintained separately and would not spoil
>   the development of the core.
>
>   Technically, the goal is to separate the core of the
>   Python language from extensions that will be known in
>   future. In some sense, the mechanism is the adapter to the
>   something else to give it Python interface. The C/C++
>   would not be the only alternative to implement a module
>   used from a Python script.
>
>   If modules can be viewed as prefabricated building blocks
>   for writing the Python programs, the interpreter
>   extensions could be viewed as building blocks for
>   the interpreter functionality.
>
>   As modules, some interpreter extensions could be standard,
>   some could even be considered built-in, some could be
>   from third parties.
>
>   Some interpreter extensions could be used as a testbed for
>   adding new features:
>
>   For example, pure UTF-16 sources could be preprocessed by
>   some "experimental" interpreter extension to the form that
>   could be consumed by the core interpreter. And one day,
>   the UTF-8 or 8-bit with explicitly stated encoding can be
>   transformed to the only modern UTF-16 representation that
>   new sources should use. The designers of the core language
>   may freely decide to change the internals if they provide
>   the adapter via the extension.
>
>   Another "backward-compatibility extension" could check
>   whether some old feature could reliably be replaced by new
>   feature and translate the old source to the new one on the
>   fly.
>
>
>
> Backwards Compatibility
>
>   This would be new feature. It will not break the backward
>   compatibility.
>
>   From another point of view, the mechanism can even improve
>   the backward compatibility of Python 3000 for example by
>   embeding the Python 2.x interpreter inside and recognition
>   of the modules written for Python 2.x language version.
>   The oldness of the legacy module could be recognized by
>   the Python 3000 interpreter and the module could be passed
>   to the extension responsible for interpretation of the old
>   code.

PEP 3099 - Things that will not change in Python 3000 says:

Python will not have programmable syntax.

It seems Guido has made up  his mind.

John Roth



From fivenastydisco at hotmail.com  Mon Nov 13 03:35:31 2006
From: fivenastydisco at hotmail.com (donkeyboy)
Date: 13 Nov 2006 00:35:31 -0800
Subject: Jython compile errors ...
Message-ID: <1163406931.241442.243390@e3g2000cwe.googlegroups.com>

All,

I've tried the jythonc compiler to try and create an applet to see how
it works, but I get a number of Java compile errors that are way above
my knowledge. Does anyone know what any of the following means? I'm
using JDK 1.5.0_09, under Win XP SP2.

Runnnig the file " jython FILENAME" works, so I don't know what's
happening. Any thoughts?

C:\EclipseWorkbench\Jython>jythonc -d --jar leaders.jar jy_leaders.py
processing jy_leaders

Required packages:
  javax.swing
  java.lang
  java.awt
  java.applet
  java.util

Creating adapters:
  java.awt.event.ActionListener used in jy_leaders

Creating .java files:
  jy_leaders module
    MyDrawPanel extends javax.swing.JPanel
    Main extends java.applet.Applet

Compiling .java to .class...
Compiling with args: ['c:\\Program
Files\\Java\\jdk1.5.0_09\\bin\\javac', '-clas
spath',
'C:\\jython\\jython.jar;;.\\jpywork;;C:\\jython\\Tools\\jythonc;C:\\Ecli
pseWorkbench\\Jython\\.;C:\\jython\\Lib;C:\\jython',
'.\\jpywork\\jy_leaders.jav
a']1  .\jpywork\jy_leaders.java:3: <identifier> expected
public class jy_leaders extends java.lang.Object {
             ^
.\jpywork\jy_leaders.java:8: '{' expected
    public static class _PyInner extends PyFunctionTable implements
PyRunnable {

                  ^
.\jpywork\jy_leaders.java:419: ')' expected
            Py.initProxy(this, "jy_leaders", "MyDrawPanel", args, 2
jython_leaders_sandbox.jpy$packages, jy_leaders.jpy$proxyProperties
, "", new String[] {"jy_leaders"});

^
.\jpywork\jy_leaders.java:548: ')' expected
            Py.initProxy(this, "jy_leaders", "Main", args, 2jython_
leaders_sandbox.jpy$packages, jy_leaders.jpy$proxyProperties, "", n
ew String[] {"jy_leaders"});

 ^
.\jpywork\jy_leaders.java:565: ')' expected
        Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
ring[] {"jy_leaders"});
                    ^
.\jpywork\jy_leaders.java:565: ';' expected
        Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
ring[] {"jy_leaders"});
                                                    ^
.\jpywork\jy_leaders.java:565: <identifier> expected
        Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
ring[] {"jy_leaders"});
                                                         ^
.\jpywork\jy_leaders.java:565: '{' expected
        Py.runMain(jy_leaders._PyInner.class, newargs, 2jython_lead
ers_sandbox.jpy$packages, jy_leaders.jpy$mainProperties, "", new St
ring[] {"jy_leaders"});


                                   ^
.\jpywork\jy_leaders.java:569: '}' expected
^
9 errors

ERROR DURING JAVA COMPILATION... EXITING

Any help would be of great assistance -- thanks in advance.



From mail at microcorp.co.za  Thu Nov  9 01:06:46 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 9 Nov 2006 08:06:46 +0200
Subject: [DLC] ChiPy Monthly Meeting, Thursday 7:00 pm.
References: <1162921007.26531.275231865@webmail.messagingengine.com>	<eiqkpa$23c$1@sea.gmane.org><023601c70300$2d1ce460$03000080@hendrik>
	<eis01l$suh$1@sea.gmane.org>
Message-ID: <004a01c703c5$3d73fa40$03000080@hendrik>


"Steve Holden" <steve at holdenweb.com>


> Hendrik van Rooyen wrote:
> >  "Steve Holden" <steve at holdenweb.com> wrote:
> >
> >
> >>I don't suppose there's any chance that someone might be passing
> >>Schaumberg on their way to this meeting? I'm teaching there, and a ride
> >>would avoid me having to rent a car (and hence increase the probability
> >>I'd make it).
> >
> >
> > Where in the whole wide world is Schaumberg - "foam mountain" - is it near
> > Koekenaap?
> >
> It appears to be about twenty miles West and slightly North of the
> meeting venue. Zip code 60173, I believe, if that helps.
>
> regards
>   Steve

That puts you on the North American continent - nowhere near Koekenaap - I am
amazed that you are brave enough to be there, after implying that the locals do
not understand irony...

Anyway - a word of unwanted advice - avoid prominently high buildings, and
beware of low flying aircraft..

- Hendrik



From toreriks at hotmail.com  Thu Nov 23 06:35:43 2006
From: toreriks at hotmail.com (Tor Erik Soenvisen)
Date: Thu, 23 Nov 2006 11:35:43 +0000 (UTC)
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
	<pan.2006.11.23.11.27.54.956445@REMOVE.THIS.cybersource.com.au>
Message-ID: <Xns98848020C9BB8toreriknpolarno@129.242.5.222>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote in
news:pan.2006.11.23.11.27.54.956445 at REMOVE.THIS.cybersource.com.au: 

> On Thu, 23 Nov 2006 10:48:32 +0000, Tor Erik Soenvisen wrote:
> 
>> Hi,
>> 
>> 
>> (len(['']) is 1) == (len(['']) == 1) => True
> 
> You shouldn't rely on this behaviour:
> 
>>>> x = 100000
>>>> len('a' * x) == x
> True
>>>> len('a' * x) is x
> False
> 
> (Your results may vary -- this depends on the implementation.)
> 
> 
> 
>> Is this the case for all numbers? I've tried running the following:
>> 
>> for i in range(10000):
>>          for j in range(10000):
>>           if i != j:
>>                assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
>> (i))
>> 
>> which executes fine. Hence, 0-9999 is okey... 
> 
> This doesn't necessarily hold for all integers -- again, it depends on
> the implementation, the precise version of Python, and other factors.
> Don't rely on "is" giving the same results as "==".
> 
>>>> (1+2+3+4+5)**7 == 15**7
> True
>>>> (1+2+3+4+5)**7 is 15**7
> False
> 
>> But this is a relatively 
>> small range, and sooner or later you probably get two numbers with
>> the same id... Thoughts anyone?
> 
> No, you will never get two objects existing at the same time with the
> same id. You will get two objects that exist at different times with
> the same id, since ids may be reused when the object is deleted.
> 
>> PS: For those of you who don't know: keyword is compares object
>> identities 
> 
> Exactly. There is no guarantee that any specific integer object "1"
> must be the same object as another integer object "1". It may be, but
> it isn't guaranteed.
> 
> I think the only object that is guaranteed to hold for is None. None
> is a singleton, so there is only ever one instance. Hence, you should
> test for None with "obj is None" rather than ==, because some custom
> classes may do silly things with __eq__:
> 
> class Blank(object):
>     """Compares equal to anything false, including None."""
>     def __eq__(self, other):
>         return not other
> 
> 
I've seen code like this:

if type([]) is list:
    	print 'Is list'

which seem to work. And also I've seen "var is None", as you mention.


From joshbloom at gmail.com  Tue Nov 14 13:32:44 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Tue, 14 Nov 2006 11:32:44 -0700
Subject: Looking for a way to stop execution of script, in the script
Message-ID: <d25b6e9a0611141032q537c4017r8d346489dba9759f@mail.gmail.com>

Hi everyone, I'm looking for a way to stop execution of a script from within
the script.

I'm familiar with this idiom:

While 1:
  doFirstThing()
  doSecondThing()
  if something:
    break
  doThirdThing()
  break

But that seems a little kludgy to me with extra breaks involved.
Is there a way to do something like this?

doFirstThing()
doSecondThing()
if something:
    die
doThirdThing()

Thanks for the help,
Josh
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From fredrik at pythonware.com  Fri Nov 17 18:42:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 00:42:14 +0100
Subject: Decimal() instead of float?
In-Reply-To: <ejlgb0$33s$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper>	<ej9epb$e23$2@sea.gmane.org><1163511997.4675.88.camel@pepper>	<4559F828.7070704@holdenweb.com><ejeuqb$ldd$1@sea.gmane.org>	<1163794251.5107.151.camel@pepper><ejl5s5$334$1@sea.gmane.org>	<1163800304.5107.179.camel@pepper>
	<ejlgb0$33s$1@sea.gmane.org>
Message-ID: <ejlhco$5j1$1@sea.gmane.org>

Terry Reedy wrote:

> This is far more accurate than any measured latitude could be.

you're saying that we don't measure geographical positions on an atomic 
scale? ;-)

(it's too late for serious calculations, but I'd guess we're talking 
?ngstr?ms here, right?)

</F>



From antoine at vo.lu  Tue Nov  7 12:38:21 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 07 Nov 2006 18:38:21 +0100
Subject: shutil: permission denied errors on windows
In-Reply-To: <1162858987.931532.61530@h48g2000cwc.googlegroups.com>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
	<1162858987.931532.61530@h48g2000cwc.googlegroups.com>
Message-ID: <a271b$4550c48f$544abc47$5625@news.hispeed.ch>

Thanks for your replies, guys. I found the problem now.

Actually the problem arised just before the code that I had in my 
original post.

Here are the 2 lines that mess things up. It's those that are commented 
out. If not commented, the errors were raised.

Clearly there is an error in the second line. It includes subdirs and s 
instead of files and f. Took me 2 days to finally see it.

for dir, subdirs, files in os.walk(tree_top):

        # subdirs[:] = [s for s in subdirs if 
os.path.join(dir,s).replace('\\', '/') not in excluded]
        # files[:] = [f for f in subdirs if 
os.path.join(dir,s).replace('\\', '/') not in excluded]

         for s in subdirs:
             bak_sub = os.path.join(dir, s).replace(tree_top, backup_dir)
             if not os.path.exists(bak_sub):
                 log('Creating directory %s' % bak_sub)
                 os.mkdir(bak_sub)

         for l in files:
             [code pasted earlier]...



But what still beats me is why my minimal example with folders 'a' and 
'b' didn't work... It was independent of this code...

Anyway, my program works now, and that's for the moment the most 
important thing.

Regards,
antoine

John Henry wrote:
> I use the copy function a lot and never have problem.  I suggest that
> you write a no brainer standalone test code and if it still fails
> there, then you have a problem with your installation.
> 
> Antoine De Groote wrote:
>> Google tells quite some things about it, but none of them are satisfactory.
>>
>> I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13]
>> Permission denied all the time, for the source files. It seems that this
>> is the case for all my files. But what I don't understand is that
>> yesterday it still worked. I didn't change anything on my system though
>> (at least not that I am aware of). I restarted the computer several
>> times to see if that helped, but it didn't. Also I can't find a process
>> that would be using the files...
>>
>> Has anybody experienced this problem before, or have a solution?
>>
>> Kind regards,
>> antoine
>>
>> Here's the code that throws the errors
>>
>> [...]
>> for l in files:
>>              from_file = os.path.join(dir, l)
>>              to_file = from_file.replace(tree_top, backup_dir)
>>              try:
>>                  if not os.path.exists(to_file):
>>                      log('Copying new      %s' % from_file)
>>                      counter_new += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif int(os.path.getmtime(from_file)) >
>> int(os.path.getmtime(to_file)):
>>                      log('Copying modified %s' % from_file)
>>                      counter_mod += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif os.path.getsize(from_file) > os.path.getsize(to_file):
>>                      log('Sizes differ, but not rest: Copying %s' %
>> from_file)
>>                      counter_special += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif os.path.getsize(from_file) < os.path.getsize(to_file):
>>                      log('Orig file smaller than backup file: Copying
>> %s' % from_file)
>>                      counter_special += 1
>>                      shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
>>                      shutil.copy2(from_file, to_file)
>>                  else:
>>                      #log('not treated: %s' % l)
>>                      pass
>>
>>              except (OSError, IOError), e:
>>                  not_accessible += 1
>>                  print e
>> [...]
> 


From anton.vredegoor at gmail.com  Mon Nov 20 09:26:33 2006
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Mon, 20 Nov 2006 15:26:33 +0100
Subject: n-dim permutation matrix/generator?
In-Reply-To: <ejsb3h$uue$1@news.albasani.net>
References: <ejsb3h$uue$1@news.albasani.net>
Message-ID: <ejsdu4$ka3$1@news3.zwoll1.ov.home.nl>

robert wrote:

> for the purpose of flat n-dim iteration a function or generator 
> ndim_permute(*v) should compute or generate a list of tuples like:
> 
> ndim_permute( (0,1,2), (0,1), (0,1), ) ->
> 
> 0 0 0
> 0 0 1
> 0 0 2
> 0 1 0
> 0 1 1
> 0 1 1

hmm ... shouldn't his be (0 1 2) ?

> 1 0 1
> ....
> 
> 
> what is a good solution? Or is there already a total iterator existing 
> somewhere in the stdlib?

I think there are good solutions in the python cookbook at:

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

But it gives a page mentioning 'system difficulties' now, so I can't 
check. Someone else will post the link to their favorite recipe. 
Meanwhile, this gives me a chance to plug some of my experimental code :-)

A.

def ncycle(seq,n):
     while True:
         for x in seq:
             for dummy in xrange(n):
                 yield x

def cross(*args):
     p,R = 1,[]
     for arg in args:
         L = list(arg)
         R.append(ncycle(L,p))
         p *= len(L)
     R.reverse()
     for dummy in xrange(p):
         yield tuple(x.next() for x in R)

def test():
     for x in cross((0,1,2), (0,1), (0,1)):
         print x

if __name__=='__main__':
     test()









From no-spam at no-spam-no-spam.invalid  Fri Nov 24 05:07:56 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 11:07:56 +0100
Subject: socket.error connection refused
In-Reply-To: <1164283758.225074.9810@h54g2000cwb.googlegroups.com>
References: <1164283758.225074.9810@h54g2000cwb.googlegroups.com>
Message-ID: <ek6g9v$sb7$1@news.albasani.net>

Vania wrote:
> Hi, I'm not sure this is the proper forum but I try nevertheless.
> The problem I'am facing is that the socket library always fail to
> connect to an URL. The net effect is that I can not use setuptools.
> I'm using Python2.4 on a windows XPPRO Sp2 machine.
> The firewall is disabled.
> There is no NLTM proxy.
> I connect to the internet through a NAT server (and it works).
> Other than with easy_install I tried to connect to a number of external
> urls
> (all of them running) and even to localhost,
> directly in script using urllib
> and the error is always the same errno:  10061 connection refused.
> Any ideas?


urllib.urlopen can pick up an invalid proxy setting from environ or IE-settings.

routers/NAT servers sometimes need a 2nd tick - all browsers try it 2..4 times before displaying "no connection" - this is (unfortunately) not the default behavior of the "browser" urllib.

if bare

>>> import httplib
>>> h=httplib.HTTPConnection('www.google.com')
>>> h.connect()
>>> h.request('GET','/')
>>> h.getresponse().read()
'<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">\n<TITLE>302 Moved</TITLE></HEAD><BODY>\n<H1>302 Moved</H1>\nThe document has moved\n<A HREF="http://www.google.de/">here</A>.\r\n</BODY></HTML>\r\n'
>>> 

fails on multiple trials, then you have a very strange network setup. maybe multiple/confusing NIC's ...


Robert


From gh at gregor-horvath.com  Tue Nov 21 07:52:29 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 21 Nov 2006 13:52:29 +0100
Subject: Reference class in class creation
In-Reply-To: <4sga7nFsi0j0U1@mid.uni-berlin.de>
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
Message-ID: <a1c52$4562f68e$547078de$28920@news.chello.at>

Diez B. Roggisch schrieb:

> Anything wrong with:
> 
> class Foo(object):
>    pass
> 
> Foo.a = Foo
> 
> ?

Thanks.
The problem with this is that there is also metaclass hacking involved
which relies on "a" 's creation in the class body. In your suggestion
"a" is not present when __new__ of the metaclass is called.

-- 
Servus, Gregor


From rdiaz02 at gmail.com  Sun Nov 12 16:46:25 2006
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Sun, 12 Nov 2006 22:46:25 +0100
Subject: numpy/scipy: correlation
In-Reply-To: <ej7cft$8de$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net>
Message-ID: <624934630611121346u6025983dsc319db258f852cc8@mail.gmail.com>

On 11/12/06, robert <no-spam at no-spam-no-spam.invalid> wrote:
> Robert Kern wrote:
> > robert wrote:

(...)
> One would expect the error range to drop simply with # of points. Yet it depends more complexly on the mean value of the coef and on the distribution at all.
> More interesting realworld cases: For example I see a lower correlation on lots of points - maybe coef=0.05 . Got it - or not?  Thus lower coefs require naturally a coef-err to be useful in practice.
>

(...)

> I remember once I saw somewhere a formula for an error range of the corrcoef. but cannot find it anymore.
>
(...)
>
> Does anybody know how this prob.-value is computed/motivated? Such thing would be very helpful for numpy/scipy too.
>
>

There is a transformation of the correlation coefficient that is
distributed as a t-statistic under the null. This was derived a long
way back, and is the usual, standard, way to test for significance of
(attach a p-value to) correlation coefficients.  I do not recall the
formula from top of my head, but I am sure any google search will find
it. And of course, any decent intro stats textbook will also provide
it. You can look in your nearby library for popular textbooks such as
Snedecor & Cochran, or Sokal & Rohlf, or the wonderful "Beyond Anova"
by Miller, which do have the expression.

Since this is such a common procedure all stats programs do provide
for tests of significance of correlation coefficients. A whole bunch
of them are free, and one is widely used: R (check
http://cran.r-project.org). This is an easy way for you to test the
output of your stats code in Python.

Now, since you can do a significance test, you can invert the
procedure and obtain a confidence interval (of whichever width you
want) for your correlation coefficients. This CI will (almost always)
be assymmetric. (And recall that CI do have a not-obvious
interpretation). CI of correlation coefficients are not as common as
p-values, but this is doable too.

The expression (and "improved versions" of it, I think Sokal & Rohlf
show several) is easy to compute. And I bet obtaining the density of a
t-distribution with k d.f. is also available already for Python. So
this part is definitely doable.


Best,

R.

(...)
> Now think of adding 'boring data':
>
> >>> X=[1.,2,3,4]
> >>> Y=[1.,2,3,5]
> >>> sd.correlation((X,Y))     # my old func
> (1.3, -0.5, 0.982707629824)   # m,o,coef
> >>> numpy.corrcoef((X,Y))
> array([[ 1.        ,  0.98270763],
>        [ 0.98270763,  1.        ]])
> >>> XX=[1.,1,1,1,1,2,3,4]
> >>> YY=[1.,1,1,1,1,2,3,5]
> >>> sd.correlation((XX,YY))
> (1.23684210526, -0.289473684211, 0.988433774639)
> >>>
>
> I'd expect: the little increase of r is ok. But this 'boring data' should not make the error to go down simply ~1/sqrt(N) ...
>
> http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient#Trivia
> says:
>   In MATLAB, corr(X) calculates Pearsons correlation coefficient along with p-value.
http://links.jstor.org/sici?sici=0162-1459(192906)24%3A166%3C170%3AFFPEOC%3E2.0.CO%3B2-Y
> tells:
>
> probable error of r = 0.6745*(1-r**2)/sqrt(N)
>
> A simple function of r and N - quite what I expected above roughly for the N-only dep.. But thus it is not sensitive to above considerations about 'boring' data. With above example it would spit a decrease of this probable coef-err from
>
> 0.0115628571429 to 0.00548453410954 !
>
> And the absolute size of this error measure seems to be too low for just 4 points of data!
>
> The other formula which I remember seeing once was much more sophisticated and used things like sum_xxy etc...
>
>
> Robert
>
>
>
> PS:
>
> my old func is simply hands-on based on
> n,sum_x,sum_y,sum_xy,sum_xx,sum_yy=len(vx),vx.sum(),vy.sum(),(vx*vy).sum(),(vx*vx).sum(),(vy*vy).sum()
> Guess its already fast for large data?
>
>
> Note: numpy.corrcoef strikes on 2 points:
> >>> numpy.corrcoef(([1,2],[1,2]))
> array([[          -1.#IND,           -1.#IND],
>        [          -1.#IND,           -1.#IND]])
> >>> sd.correlation(([1,2],[1,2]))
> (1, 0, 1.0)
> >>>
> >>> numpy.corrcoef(([1,2,3],[1,2,3]))
> array([[ 1.,  1.],
>        [ 1.,  1.]])
> >>> sd.correlation(([1,2,3],[1,2,3]))
> (1, 0, 1.0)
>
>
> PPS:
>
> A compatible scipy binary (0.5.2?) for numpy 1.0 was announced some weeks back. Think currently many users suffer when trying to get started with incompatible most-recent libs of scipy and numpy.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


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


From no-spam at no-spam-no-spam.invalid  Fri Nov 24 07:08:55 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 13:08:55 +0100
Subject: Pimping the 'cgi' module
In-Reply-To: <mailman.670.1164364120.32031.python-list@python.org>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>	<ek50ag$q3l$1@news.albasani.net>
	<mailman.670.1164364120.32031.python-list@python.org>
Message-ID: <ek6ncq$7pp$1@news.albasani.net>

Christoph Haas wrote:
> On Thursday 23 November 2006 21:29, robert wrote:
>> When a LAMP programmer comes to Python, there are so many different
>> confusing things. It starts with a 'non-documented' cgi module - a
>> 'High-Level-Interface', that cannot even iterate over the form items. A
>> name ZOPE in focus which reveals to be a monster system with 2-year
>> learning-curve, ready for running an article editorial system for TOP-10
>> newspaper companies, but unable to make simple things simple. A handful
>> of different Djangos - choose one for each weekday and programmer ...
>> And Ruby made it with this single-known simple URL-to-method-router (And
>> possibly when coming from PHP & Perl one recognizes ::@$_$%??%/&... and
>> the old namespace dirt) If there would have been a good cgi-system and a
>> somewhat comfortable advanced URL-to-OO-router (beyond the socket
>> wrapper HTTPServer) well exposed in the Python standard lib, the numbers
>> would be probably very different today ...
> 
> I can fully second that. Coming from Perl and being used to the CGI module 
> that is de-facto standard and already doing things much better than 
> Python's equivalent my first thought was: "Does Python really expect me to 
> re-invent the wheel to write basic CGIs?" So I started creating 
> cookie-based session handlers, form field handling etc.

That exactly is where Python lost real numbers. All kinds of fancy things are in the standard lib, but not these must-have's in a good collection ..

> The reason of my posting it not only to complain though. My Python skills 
> are average but I would really like to help contribute some code on this 
> topic. I don't know Ruby-on-Rails myself but I have worked with CGIs for 
> ten years both in C (yuk) and Perl (Perl=semi-yuk / Perl-CGI=yum) and 
> think I know what people coming from Perl expect. And I'm not speaking of 
> Zope or Django or huge frameworks. I try to avoid frameworks wherever I 
> can (I want to write Python - not Zope or Django). I rather rely on the 
> standard library unless it's really saving me time and worth learning 
> another language. Are frameworks perhaps even telling that the standard 
> library is still lacking in some way?

well, note, for that they have named it Ruby-On-Rails, so its still the language - leveraged. 
While it is Zope/Django/Ego-on-Python ... ?

So its about the right level of a framework. (even a cgi module is a framework.)

I think i could learn to like this one as basic intuitive idea: http://www.cherrypy.org/

Unless a Guido'ed version of such thing is not _selected_ into the stdlib or at least promoted single-mindedly and prominently by far before high-tech-but-low-number names like Zope and Django, Python will continue to bleed out heavily on numbers vs. Ruby.

First need of course: an update of that cgi "module".

> I'm thinking of features like:
> - cookie handling
> - cookie-session handling (similar to PHP or Perl's CGI::Session; combined
>   with database backends or simple text files)
> - handling of form fields (Perl's CGI class can easily redisplay what
>   has been entered in the fields when they got submitted through a <FORM>)
> - accessing parameters (honestly I haven't yet understood why I need to use
>   .value on FielStorage dictionaries - why isn't it just a plain
>   dictionary?)
> - state keeping (storing the contents of all form fields on disk
>   to retrieve it later)
> - creating form elements easily (option lists for example from
>   dictionaries and lists like in Perl)
> - creating standard HTML elements (or do you remember how DOCTYPE
>   looks without looking it up?)
> - handling of file uploads (which is just a recipe on ActivePython
>   at the moment)
> - controlling HTTP headers (expires, redirections, charset)
> - convenience functions e.g. for getting the client IP address without
>   needing to read ENV['REMOTE_ADDR']

tell it loud

> Well, of course there are modules like 'cgi' or 'cookielib' and others may 

Cookie. (cookielib is for clients.)
But read the doc chapter "Cookie -- HTTP state management"...
What is 'input': "If input is given, it is passed to the load() method. " ...
So first read the "Example", oohhhh .... :-)

I tell you - you will know how to achieve cookie/session handling before you read all source code and the RFC's

So its not much disadvantage to not know about the existence of this module.

> argue that everything is already there. And there is a 'Web.py' already (I 
> assume every CGI programmer has written their own Web.py already). But 

yes - which Web.py :-)   another v0.138 : http://webpy.org/ ?

> can't we come closer to what other scripting languages provide? Something 
> common? Can't a simple form-based CGI just be a matter of a dozen lines? 
> When it comes to CGIs Python loses its elegance for no reason.

No other language could do it in less lines. There is no other excuse than: *********

> I'm ready to invest work and ideas if anyone else is interested. Perhaps 
> some day it makes it into the standard library or at least gives us 
> something between the features of the standard library and huge framework 
> monsters - something people can be pointed at when starting with Python 
> and CGIs. I'll probably do that anyway because my web projects all use 
> their own reinvented wheel and I'm losing the overview. And even Perl has 
> come that route - it started with a cgi-lib.pl which later became 
> the 'CGI' standard module.

I'd vote for that. 

> Is it just a matter of lacking resources or interest? Even if there is no 

python-dev is fully occupied with top-notch inner life. Of course that is the basis.
But key issues in lib&tools were simply forgotten - left to a random community.

> interest I'll probably read "man CGI" and "man CGI::Session" again and 
> start implementing something nifty for ex-perlies like myself. Hmmm, 
> batteries included even for CGI programmers, a man can dream. :)

Go for a start. In order to realize that essential batteries in good quality within time - even after 10 years now - it is necessary, to hook python-dev for even requesting it actively. Just adding to http://wiki.python.org/moin/WebProgramming and http://wiki.python.org/moin/WebFrameworks is not the task. It requires some organization and somewhat a selection process in addition to good (probably existing) code v0.1xxx material. 
I think it would not be overly complex. Both, a new cgi and possibly included snake "rails" (vs "oil")


Robert


From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 19:28:25 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 01:28:25 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.182.1163566134.32031.python-list@python.org>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<mailman.182.1163566134.32031.python-list@python.org>
Message-ID: <455babb2$0$20635$426a74cc@news.free.fr>

Michael Torrie a ?crit :
> On Tue, 2006-11-14 at 18:55 -0800, Luis M. Gonz?lez wrote:
> 
>>>- Python is more readable, and more general purpose
>>
>>Yes, php is only for web.
> 
> 
> Absolutely false. 

 From a purely technical POV, you're of course right. But PHP has been 
hacked (nobody in it's own mind would pretend it has ever been 
'designed') for web programming, and since the language by itself is 
totally and definitively braindead, using it for anything else is either 
  masochism or lack of knowledge of better solutions. Heck, even Perl is 
better for pure admin/scripting tasks.

> Most of my standalone, command-line scripts for
> manipulating my unix users in LDAP are written in PHP,

Yuck.

> although we're
> rewriting them in python.
> 
> Although I can't think of a single app written in php that's not web-
> based (other than standalone scripts I have written), there are up-to-
> date php bindings for GTK: http://gtk.php.net/

As a matter of fact, while PHP *can* be used for GUI and CLI apps, 
you'll have hard time finding non-web PHP-based projects... OTOH, you'll 
find Python everywhere, from sys-admin scripts to full-blown web 
application servers to rich GUI clients. There must be a reason...


From mh at pixar.com  Mon Nov 27 02:55:33 2006
From: mh at pixar.com (Mark Harrison)
Date: Mon, 27 Nov 2006 07:55:33 GMT
Subject: --enable-shared, how do i set the rpath?
Message-ID: <VRwah.14825$6t.1704@newssvr11.news.prodigy.com>

I've built a python with --enable-shared in order to support mod_python,
but now I have to set LD_LIBRARY_PATH to $prefix/lib. 

Worse, it seems mod_python will die on some import statements,
I'm suspecting ones that need to pull in .so's.

Any clues appreciated...
Mark.

-- 
Mark Harrison
Pixar Animation Studios


From xi at gamma.dn.ua  Sat Nov 18 14:22:48 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sat, 18 Nov 2006 21:22:48 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118190822.GB19739@phd.pp.ru>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
Message-ID: <20061118192248.GB29614@58sirius016.dc.ukrtel.net>

On Sat, Nov 18, 2006 at 10:08:22PM +0300, Oleg Broytmann wrote:
> On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
> > Could anyone suggest me a simple IDE suitable for teaching Python as a
> > first programming language to high school students?
> 
>    Does it have to be an IDE? Wouldn't it be better to use a simple text
> editor + command line?

Preferably.  I believe that using a editor + command line will only make
things worse because console and GUI have different encodings under
Windows.  So a student that have written a script in a GUI editor and saved
it in UTF-8 would see garbage in console.


Thanks,
Kirill


From karye2004 at gmail.com  Wed Nov  8 15:04:02 2006
From: karye2004 at gmail.com (karye2004 at gmail.com)
Date: 8 Nov 2006 12:04:02 -0800
Subject: Python c-api and reusing python-objects: works only once
Message-ID: <1163016241.418970.54900@b28g2000cwb.googlegroups.com>

Hi!

I'm trying to access python objects from c++. It works once. Second
time it hangs.
Does someone have any clue or some example code or pointer?

Thanks!
/Karim

Here are some python classes:

--------------------------------------------------------------------------------------------------
import portage

class PortageInterface:
	def __init__(self):
		self.vartree = portage.db[portage.root]["vartree"]
		self.porttree = portage.db[portage.root]["porttree"]

	def installedPackages(self):
		return self.vartree.dbapi.cp_all()

	def installedPackagesVersion(self):
		t = []
		for cpv in self.vartree.dbapi.cpv_all():
			mysplit = portage.catpkgsplit(cpv)
			mypkg = "/".join(mysplit[:3])
			if mysplit[3] != "r0":
				mypkg = mypkg + "-" + mysplit[3]
			t.append( mypkg )
		return t

	def portagePackages(self):
		return self.porttree.dbapi.cp_all()

	def allPortagePackages(self):
		t = []
		t = self.porttree.dbapi.cp_all()
		t += self.vartree.dbapi.cp_all()
		return t

	def allPackagesVersion(self):
		t = []
		for x in self.porttree.dbapi.cp_all():
			t.extend( self.porttree.dbapi.cp_list(x) )
		return t

	def getAllPackageData(self, db, keys):
		rval = {}
		cplist = db.cp_all()
		cplist.sort()
		for cp in cplist:
			for cpv in db.cp_list(cp):
				rval[cpv] = db.aux_get(cpv, keys)
		return rval

	def allPackagesData(self):
		testdata = {}
		testdata = self.getAllPackageData(self.porttree.dbapi,
["DESCRIPTION", "HOMEPAGE", "LICENSE", "KEYWORDS", "IUSE", "SLOT"])
		t = []
		for cpv in testdata.keys():
			mysplit = portage.catpkgsplit(cpv)
			mypkg = "/".join(mysplit[:3])
			if mysplit[3] != "r0":
				mypkg = mypkg + "-" + mysplit[3]
			t.append( mypkg )
			for v in testdata[cpv]:
				t.append( v )
		return t
--------------------------------------------------------------------------------------------------

And the c++ class executed inside a thread:
--------------------------------------------------------------------------------------------------
#include "pythonizer.h"

#ifdef _XOPEN_SOURCE
#undef _XOPEN_SOURCE
#endif

#ifdef _POSIX_C_SOURCE
#undef _POSIX_C_SOURCE
#endif

#include <Python.h>

#include <qstringlist.h>
#include <qfile.h>

#include <kdebug.h>

#define foreach( x ) \
for( QStringList::ConstIterator it = x.begin(), end = x.end(); it !=
end; ++it )

#define LINE_INFO " ( " << k_funcinfo << "Line: " << __LINE__ << " )"
<< endl
#define DEBUG_LINE_INFO kdDebug() << LINE_INFO

Pythonizer::Pythonizer( const char *file, char *pyClass )
	: m_file( file ), m_pyClass( pyClass )
{
	kdDebug() << "Pythonizer::Pythonizer" << endl;
}

Pythonizer::~Pythonizer()
{
	kdDebug() << "Pythonizer::~Pythonizer" << endl;
}

QStringList Pythonizer::getPackages( char *pyModule )
{
	DEBUG_LINE_INFO;

	// Initialize the Python Interpreter
	Py_Initialize();

	PyObject *pName, *pModule, *pDict, *pValue, *pClass, *pInstance;

    // Build the name object
	pName = PyString_FromString( m_file );

	DEBUG_LINE_INFO;
	if ( PyErr_Occurred() ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

    // Load the module object
	pModule = PyImport_Import( pName );

	DEBUG_LINE_INFO;
	if ( PyErr_Occurred() ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

    // pDict is a borrowed reference
	pDict = PyModule_GetDict( pModule );

	DEBUG_LINE_INFO;
	if ( PyErr_Occurred() ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

	// Build the name of a callable class
	pClass = PyDict_GetItemString( pDict, m_pyClass );

	DEBUG_LINE_INFO;
	if ( PyErr_Occurred() ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

    // Create an instance of the class
	if ( PyCallable_Check( pClass ) ) {
		pInstance = PyObject_CallObject( pClass, NULL );

		DEBUG_LINE_INFO;
		if ( PyErr_Occurred() ) {
			PyErr_Print();
			PyErr_Clear();
			return QStringList::QStringList();
		}
	}
	else {
		kdDebug() << "Can not create python class instance." << endl;
		return QStringList::QStringList();
	}

	// Call a method of the class with two parameters
	pValue = PyObject_CallMethod( pInstance, pyModule, NULL );

	if ( PyErr_Occurred() ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

	PyObject *iterator = PyObject_GetIter( pValue );
	if ( iterator == NULL ) {
		PyErr_Print();
		PyErr_Clear();
		return QStringList::QStringList();
	}

	QStringList packageList;
	PyObject *item;
	while ( item = PyIter_Next( iterator ) ) {
		packageList << PyString_AsString( item );

    	/* release reference when done */
		Py_DECREF( item );
	}
	Py_DECREF( iterator );

    // Clean up
	Py_DECREF( pValue );
	Py_DECREF( pInstance );
	Py_DECREF( pClass );
// 	Py_DECREF( pDict );
	Py_DECREF( pModule );
	Py_DECREF( pName );

	PyErr_Clear();

	DEBUG_LINE_INFO;

	// Finish the Python Interpreter
	Py_Finalize();

	return packageList;
}
--------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------
#ifndef PYTHONIZER_H
#define PYTHONIZER_H

#include <qstringlist.h>

class Pythonizer{
public:
	Pythonizer( const char *file, char *pyClass );
    ~Pythonizer();

	QStringList		getPackages( char *pyModule );

private:
	QString			m_file;
	QString			m_pyClass;
};

#endif
--------------------------------------------------------------------------------------------------



From donald.welch at hp.com  Wed Nov 15 12:35:45 2006
From: donald.welch at hp.com (dwelch91)
Date: Wed, 15 Nov 2006 09:35:45 -0800
Subject: Yield
In-Reply-To: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
Message-ID: <455b4f9f$1@usenet01.boi.hp.com>

Mateuszk87 wrote:
> Hi.
> 
> may someone explain "yield" function, please. how does it actually work
> and when do you use it?
> 
> thanks in forward
> 
> mateusz
> 

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


From sturlamolden at yahoo.no  Sun Nov 26 12:43:48 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 26 Nov 2006 09:43:48 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1164518610.895461.252690@45g2000cws.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163720268.611923.3180@e3g2000cwe.googlegroups.com>
	<mailman.361.1163789556.32031.python-list@python.org>
	<1164331082.270046.290720@l39g2000cwd.googlegroups.com>
	<1164504562.834005.197830@l39g2000cwd.googlegroups.com>
	<1164518610.895461.252690@45g2000cws.googlegroups.com>
Message-ID: <1164563028.856938.12050@l12g2000cwl.googlegroups.com>

Phil Schmidt wrote:

> Well, that kind of gets right to my point. Does the "added" effort with
> Python to interface with data acquisition hardware really result in
> less productivity? I am very familiar with Matlab, Labview, and Python,
> and frankly, Python is the most productive and powerful programming
> language of the three. But it's the hardware compatibility thing that
> concerns me with Python.

This is really a question that has no general answer. It depends on the
specific hardware and the solutions available.

Generally, Matlab and Python sucks equally much when it comes to
interfacing with hardware. Both tycan use C extensions (which you may
have to write) or ctypes (Matlab's equivalent is the loadlibrary/callib
functions). If only a C SDK is available, SWIG can autogenerate Python
wrappers  (require some tweking). Matlab's loadlibrary can sometimes
parse C header files, but it is not always successful.

Both Matlab and Python can use COM/ActiveX objects on Windows. In
addition, Matlab can use Java classes, with which Python does not
interface easily. On the other hand, Python can use .NET objects, if
you use Microsoft's IronPython or "Python for .NET" with classic
Python. Last time I checked, Matlab could not use .NET objects, but
that was a year ago.

Most data acquisition hardware are supplied with SDKs for C, and
perhaps COM/ActiveX objects for RAD tools like Visual Basic and Delphi.
Modern hardware is often supplied with .NET SDKs. LabView drivers are
also commonly supplied. If none are supplied by the vendor, there are
often prewritten solutions for Matlab, Python or Java available on the
Internet, but you will have to search for them, or write your own.

Thus, it is not generally true that it is easier to interface hardware
with Matlab than Python. It depens on what SDKs you get.

On the programming side, Python is a general purpose language, Matlab
is designed for working with matrices easily. Array and matrix
computation in Python require NumPy, which has recently been declared
stable. Matlab has been stable for quite a while. Python is
multi-threaded, Matlab is single-threaded. Matlab uses pass-by-value
even for the largest of arrays, Python always pass references.

With Python, you can program with multiple threads; with Matlab, you
have everything in one thread. As Matlab only supports synchronous i/o
out of the box, you cannot do anything else while Matlab's fwrite or
fread functions are 'blocking' (i.e. waiting for data from hardware or
writing to disk). This is Matlab's major disadvantage for data
acquisition applications. Thus to make your data acquisition run
smoothly and efficiently with Matlab, you must resort to writing CMEX
extensions for performing asynchronous I/O or spawn off threads. Have
you ever looked at overlapped i/o in the Windows API? I can guarantee
that it is hundred times more complex than anything a hardware vendor
can throw at you. Alternatively, you can code the i/o in Java, and make
have Matlab call Java for i/o tasks. With Python, this is a non-issue.
You can put blocking i/o in separate threads or use prewritten APIs for
non-blocking i/o. It is obvious which is the better option here.
Generally, non-blocking i/o and multithreading is essential for any
serious data acqusition application, and Matlab does not support any of
these.

Both Matlab and Python is interpreted languages. Matlab has a
rudimentary JIT compiler, whilst classic Python is interpreted only.
Microsoft's IronPython uses the .NET JIT compiler. Jython uses Java's
JIT compiler (run the Server JVM or IBM's JDK for best performance,
don't use the client JVM with hotspot). However, if you use IronPython
or Jython, NumPy is out of the question. Thus, Matlab has perhaps a
slight advantage here.

With Python you can inline C in your Python code (e.g. using SciPy and
Weave), and even inline assembly in the inlined C. Thus you can easily
deal with hotspots in your Python code. You cannot do this easily with
Matlab.

For these reasons, my general view is that Python is better for data
acquisition than Matlab. But using Python for the sake of using Python
is nevertheless silly. The same holds true for Matlab.

A data acquisition program ofte require fast graphics as well. For slow
2D plots, Python and Matlab perform equally well (Python requires
Matplotlib). Matlab can draw 3D graphs, but not quickly. Python require
VTK for this, which may be harder to use. For fast 2D or 3D graphics,
i.e. DirectDraw, Direct3D or OpenGL, Python is the only game in town.
DirectDraw is used by SDL, which in turn is used by PyGame. Direct3D is
available though DirectPython (or COM objects or .NET objects). OpenGL
is available through PyOpenGL, which has recently been redesigned to
use ctypes; previously the build process for PyOpenGL used to be a
nightmare. For GUI, Matlab only has rudementary capabilities. Python
has several high quality GUI libraries (not counting tkinter). You can
create multimedia applications with PyGame, you cannot do this easily
with Matlab. E.g. do you want to play sound while you record?


> It seems the answers are hard to come by on this issue. I sure would be
> willing to give it a try, except that I'm getting paid to get a job
> done, not to tinker around with Python and DAQ hardware. But if
> tinkering around could save my project money on commercial software,
> and still get it done on schedule, it would be a big win. I just don't
> have confidence that it would.

That you will have to figure out your self. The answer is not obvious.
But for GUI, forget about tkinter.



From gagsl-py at yahoo.com.ar  Mon Nov 13 14:25:51 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 16:25:51 -0300
Subject: handling many default values
In-Reply-To: <1163435611.128470.146660@f16g2000cwb.googlegroups.com>
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<pan.2006.11.11.14.04.33.220606@REMOVE.THIS.cybersource.com.au>
	<e0r5h.165$5F2.28@trnddc04>
	<1163435611.128470.146660@f16g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061113162245.03ebc8a0@yahoo.com.ar>

At Monday 13/11/2006 13:33, Michele Simionato wrote:

>Alan Isaac wrote:
> > Also, as an aside, no one objected to using
> >     self.__dict__.update(kwargs)
> > in the __init__ function of the parameter holding class.
>
>It is a common trick, also shown in the Python cookbook, IIRC. If you
>are anal about
>double underscores, you can also use
>
>vars(self).update(kwargs)

Not good - that relies on vars() returning the actual __dict__.
 From <http://docs.python.org/lib/built-in-funcs.html>:
"The returned dictionary should not be modified: the effects on the 
corresponding symbol table are undefined."


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From hardcoded.software at gmail.com  Tue Nov 21 07:21:43 2006
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 21 Nov 2006 04:21:43 -0800
Subject: best bet for using a .NET dll
In-Reply-To: <mailman.533.1164109512.32031.python-list@python.org>
References: <mailman.533.1164109512.32031.python-list@python.org>
Message-ID: <1164111703.111190.276310@h54g2000cwb.googlegroups.com>


Warren Jackson wrote:
> I'd like to make a simple program that uses the Canon digital camera
> SDK (EDSDK 1.3).  Basically I need to take pictures and download them
> to my computer.  They have a fair amount of example code for the .NET
> languages, and don't officially support anything else.
>
> The API uses more than the basic c types (references, etc.) that I'm
> not totally familiar with yet.  Included at the bottom is an example
> of one of the functions.
>
> What is my best bet for writing this in Python? cTypes, IronPython,
> something else?  I haven't worked with either before but am currently
> reading up.  It seams cTypes has a difficult time dealing with
> anything but the 'normal' c types, is this correct?
>
> Would it be easier to just write a program in C# to handle all of the
> fancy types? (ie. make a function that opens and closes session, finds
> camera, takes picture, downloads picture, saves picture - that can
> then be read in python) ?  This isn't a very attractive option to me.
>
> Thanks in advance for any insight.
>
>
>
>
>
>
> 3.1.24 EdsDownload
>
> Description:
> Downloads a file on a remote camera (in the camera memory or on a
> memory card) to the host computer. The downloaded file is sent
> directly to a file stream created in advance.
> When dividing the file being retrieved, call this API repeatedly. Also
> in this case, make the data block size a multiple of 512 (bytes),
> excluding the final block.
>
> Syntax
> EdsError EDSAPI EdsDownload( EdsDirectoryItemRef inDirItemRef,
> EdsUInt32 inReadSize,
> EdsStreamRef outStreamRef )
>
> Parameters
> inDirItemRef
> Designate the file object in the camera to download.
> inReadSize
> Designate the size in bytes to download.
> outStreamRef
> Specifies the destination stream. The stream for downloading is
> created by means of EdsCreateFileStream, EdsCreateMemoryStream, or the
> like.
>
> Return Values
> Returns EDS_ERR_OK if successful. In other cases, see the EDS Error Lists.

There is also "Python for .Net", which is simply a bridge (as opposed
to IronPython, which is a complete python implementation). It works
pretty well.



From stanc at al.com.au  Fri Nov 17 02:53:41 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Nov 2006 18:53:41 +1100
Subject: popen(1-4) as a seperate process
In-Reply-To: <ejjp0u$vel$1@sea.gmane.org>
References: <455D3F18.40902@al.com.au>
	<ejjmm8$q90$1@sea.gmane.org>	<455D5EFE.40803@al.com.au>
	<ejjp0u$vel$1@sea.gmane.org>
Message-ID: <455D6A85.9040603@al.com.au>

Fredrik Lundh wrote:
> Astan Chee wrote:
>
>   
>> Yes, that is true. But everytime I run a os.popen() it executes as a 
>> child process of the current running one. How do I launch as a seperate 
>> process?
>>     
>
> what's your definition of "separate process", and how is that different 
> from a child process?  (all processes created by a process start out as 
> child processes).
>
>   
>> Note that I dont care about whatever happens to the seperate process 
>> itself.
>>     
>
> so why are you using os.popen() if you're not interested in talking to 
> it?  maybe os.system("command&") would be more appropriate ?
>
> </F>
>
>   
My appologies,
What I meant by seperate process is that the spawned process is not the 
child of the current running process or the spawned process does not 
have a parent (if that is possible).
popen not a good idea? Im not sure myself frankyl.
What would be a good method to do this? I've tried your 
os.system("command&") and the spawned process is still the child of the 
current running process (which is not what I want to happen).
Thanks again and sorry for the confusion.



From onurb at xiludom.gro  Mon Nov 13 10:26:12 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Mon, 13 Nov 2006 16:26:12 +0100
Subject: how is python not the same as java?
In-Reply-To: <mailman.57.1163425840.32031.python-list@python.org>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>	<mailman.2014.1163123991.11739.python-list@python.org>	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>	<mailman.2035.1163170200.11739.python-list@python.org>	<45584e10$0$32008$426a74cc@news.free.fr>
	<mailman.57.1163425840.32031.python-list@python.org>
Message-ID: <45588e95$0$4503$426a74cc@news.free.fr>

Jorge Vargas wrote:
> ok then they are the same lets all go back to write java....

No, thanks... I'll keep my snake !-)

And actually, I'm afraid I somewhat misunderstood your previous post - I
took it as meaning "Python has a REPL and you don't have to explicitelly
call the compiler so Python is interpreted". If that was not what you
meant, please consider this a typical case of "monday morning, not
enough coffein yet".

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gagsl-py at yahoo.com.ar  Tue Nov  7 15:30:10 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 17:30:10 -0300
Subject: C wrapper
In-Reply-To: <1162930226.658619.79830@m73g2000cwd.googlegroups.com>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107172556.054dcb58@yahoo.com.ar>

At Tuesday 7/11/2006 17:10, Sheldon wrote:

> > Take a look at the documentation for creating extension modules,
> > especially the following page:
> >
> > http://docs.python.org/ext/methodTable.html
> >
> > "The initialization function must be named initname(), where name is the
> > name of the module, and should be the only non-static item defined in
> > the module file"
> >
> > -Farshid
>
>This function is there and is called init_mymodule() but I have other
>functions that are not static.
>Could this be the cause?

For a module called foo.c the initialization function must be called 
initfoo (*not* init_foo)
And what are those non-static functions used for? The *only* purpose 
of your module should be to provide the Python bindings...


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From haraldarminmassa at gmail.com  Mon Nov 20 11:05:22 2006
From: haraldarminmassa at gmail.com (GHUM)
Date: 20 Nov 2006 08:05:22 -0800
Subject: somebody has created another timbot
Message-ID: <1164038722.444887.130910@f16g2000cwb.googlegroups.com>

Please, be assured, I am as much shocked as the rest of us:


http://www.eigodaigaku.com/en/


yeah, he calls it timbot. SHOCKING!


Harald



From m.yanowitz at kearfott.com  Fri Nov 17 10:43:10 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Fri, 17 Nov 2006 10:43:10 -0500
Subject: String Replace only if whole word?
In-Reply-To: <1163770716.864547.10460@k70g2000cwa.googlegroups.com>
Message-ID: <005401c70a5f$156e9cd0$0d7d12ac@kearfott.com>

>Michael Yanowitz wrote:
>> Hello:
>>
>>   I am hoping someone knows if there is an easier way to do this or
someone
>> already implemented something that does this, rather than reinventing the
>> wheel:
>>   I have been using the string.replace(from_string, to_string,
len(string))
>> to replace names in a file with their IP address.
>>   For example, I have definitions file, that looks something like:
>> 10.1.3.4   LANDING_GEAR
>> 20.11.222.4   ALTIMETER_100
>> 172.18.50.138 SIB
>> 172.18.50.138 LAPTOP
>> 172.18.51.32  WIN2000
>> 127.0.0.1 LOCALHOST
>>
>>   and I have a text file (a Python script) that has these names in the
file.
>> In most cases the string.replace() command works great. But there is one
>> instance which it fails:
>> Suppose I had in the file:
>>  if (LAPTOP_IS_UP()):
>>    It would replace the string with:
>>  if ("172.18.50.138"_IS_UP()):
>>
>>    Is there any easy way to avoid this, only replace if a whole word
>> matches?
>> I probably need something which determines when a word ends, and I will
>> define
>>  a word as containing only 'A'-'Z','a'-'z','0'-'9','_' . As long as the
>> string
>> contains more of the word digits after the match, don't replace?
>>
>> Thanks in advance:
>> Michael Yanowitz
>
>You need regular expressions for this. Use the re module.
>http://docs.python.org/lib/module-re.html
>
>from the docs:
>
>re.sub(pattern, repl, string[, count])
>Return the string obtained by replacing the leftmost non-overlapping
>occurrences of pattern in string by the replacement repl.
>
>Your pattern would be "[^A-Za-z0-9_]word[^A-Za-z0-9_]"
>
>[^xy] is approximately not in ('x', 'y')
>
>--
>Juho Schultz


Thanks.
  This works great except for one thing:

The character after the replacement is deleted, so that if I have
     send_data (LAPTOP, test_string)
    it would replace it with:
     send_data (10.1.3.4 test_string)
  (ignoring that the 10.1.3.4 is not quoted). The comma is missing.

Thanks in advance:
Michael Yanowitz




From bignose+hates-spam at benfinney.id.au  Thu Nov 16 23:16:35 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 17 Nov 2006 15:16:35 +1100
Subject: Printing/writing an integer to a file
References: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.com>
	<mailman.301.1163733509.32031.python-list@python.org>
	<pan.2006.11.17.03.49.43.861871@REMOVEME.cybersource.com.au>
Message-ID: <87zmaqd7x8.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVEME.cybersource.com.au> writes:

> On Fri, 17 Nov 2006 14:18:12 +1100, Ben Finney wrote:
>
> > The function call syntax doesn't allow a space between the
> > function name and the opening parenthesis.
>
> Are you sure?

Are you kidding? Do you think I'd post to this newsgroup if I wasn't
completely sure about what I wrote?

> I thought it was allowed but not recommended because it is
> hard to read.
>
> >>> len ([1, 2, 3])
> 3
>
>
> Seems to work for me.

I hope that answers your question then :-)

-- 
 \            "If you continue running Windows, your system may become |
  `\                 unstable."  -- Microsoft, Windows 95 BSOD message |
_o__)                                                                  |
Ben Finney



From rridge at csclub.uwaterloo.ca  Mon Nov 20 13:10:57 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 20 Nov 2006 10:10:57 -0800
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
	<4561515B.4060106@v.loewis.de>
Message-ID: <1164046257.736569.267090@j44g2000cwa.googlegroups.com>

Martin v. L?wis wrote:
> One approach I had been considering is to always make the decoding
> succeed, by using the private-use-area of Unicode to represent bytes
> that don't decode correctly.

Ross Ridge schrieb:
> That would conflict with private use characters appearing in file
> names.

Martin v. L?wis wrote:
> Not necessarily: they could get escaped.

How?

> AFAICT, you can have that conflict only if the file system encoding
> is UTF-8: otherwise, there is no way to represent them.

They can also appear UTF-16 filenames (obviously) and various Far-East
multi-byte encodings.

> > Personally, I think os.listdir() should return the file names only in
> > Unicode if they're actually stored that way in the underlying file
> > system (eg. NTFS), otherwise return them as byte strings.  I doubt
> > anyone in this thread would like that, though.
>
> So I assume you would not want to allow to pass Unicode strings
> to open(), stat() etc. either, as the _real_ file system API requires
> byte strings there, as well?

No, I just expect that if the underlying file system API does accept a
given byte or Unicode string that I could pass the same string to
open() and stat(), etc.. and have it work.  I have no problem if
additional strings happen to work because Python converts byte strings
to Unicode or vice-versa as the API requires.

Should I assume that since you think that having "os.listdir()" return
Unicode strings when passed a Unicode directory name is a good idea,
that you also think that file object methods (eg. readline) should
return Unicode strings when opened with a Unicode filename?

> Technically, how do you determine whether the underlying file
> system stores file names "in Unicode"?

On Windows you can use GetVolumeInformation(), though it may be more
practical to assume Unicode or byte strings based on the OS.  On Unix
you'd assume byte strings.

> Does OSX use Unicode (it requires path names to be UTF-8)?

HFS+ uses Unicode.  I have no idea how you'd figure out the properties
of a filesystem under OS/X, but then the Python docs suggests this
os.listdir() Unicode feature doesn't work on Macintosh systems anyways.

> After all, each and every encoding is a Unicode encoding - that was a design
> goal of Unicode.

If it were as simple as that, then yes, there wouldn't be a problem.
Unfortunately, as this thread has revealed, os.llistdir() isn't always
able to map byte string filenames into Unicode, either because they
don't use the assumed encoding, don't all use the same encoding or
don't use any standard encoding.  That's the problem here, there's no
encoding associated Unix filenames, they're just byte strings.  Since
Python byte strings also have no encoding associated with them they're
the natural way of representing all valid file names on Unix systems.
On the other hand, under Windows NT/2K/XP and NTFS or VFAT the natural
way to represent all valid file names is Unicode strings.

                                            Ross Ridge



From fredrik at dolda2000.com  Wed Nov 22 18:06:38 2006
From: fredrik at dolda2000.com (Fredrik Tolf)
Date: Thu, 23 Nov 2006 00:06:38 +0100
Subject: KeyboardInterrupt from syscalls
In-Reply-To: <ek25sl$4rl$1@sea.gmane.org>
References: <1164220772.5961.53.camel@pc7.dolda2000.com>
	<ek25sl$4rl$1@sea.gmane.org>
Message-ID: <1164236798.5961.56.camel@pc7.dolda2000.com>

On Wed, 2006-11-22 at 19:45 +0100, Fredrik Lundh wrote:
> Fredrik Tolf wrote:
> 
> > So how does it work? Does my code get to return Py_FALSE, and the
> > interpreter ignores it, seeing that an exception is set? Is a non-local
> > exit performed right over my call stack (in which case my next question
> > would be how to clean up resources being used from my C code)? Or does
> > something completely else happen?
> 
> the signal handler adds an entry to a "pending calls" queue, which is 
> checked by the interpreter at regular intervals.

I see. So if I get that right, that would mean that if I, in my
function, would loop and retry when getting an EINTR instead of
returning, a KeyboardInterrupt from e.g. Ctrl-C would be delayed until
it has other reason to return?

Thanks for your answer!

Fredrik Tolf




From gagsl-py at yahoo.com.ar  Fri Nov 17 20:32:14 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 17 Nov 2006 22:32:14 -0300
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <455E1E59.4030501@probo.com>
References: <mailman.277.1163700699.32031.python-list@python.org>
	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
	<455E1E59.4030501@probo.com>
Message-ID: <7.0.1.0.0.20061117222832.040fd658@yahoo.com.ar>

At Friday 17/11/2006 17:40, Tim Roberts wrote:

> > double wow!  as it is my customer wants me to print to the default
> > printer.
> > can you please help me with the command for rendering the pdf to the
> > printer with acrobat using python?
>
>You'll have to use the registry to find "acrord32", but once you find
>it, you just do:
>     os.system( "\\Program Files\\Adobe\\Acrobat 7.0\\Reader\acrord32.exe
>/p xxx.pdf" )
>The /p switch requests printing.

Or just let Windows do the dirty work of locating Adobe Reader, 
figuring out the parameters and such:

import win32api
win32api.ShellExecute(0, "print", path/to/document.pdf, None, None, 0)


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From skokot at po.opole.pl  Sun Nov 12 08:43:32 2006
From: skokot at po.opole.pl (Seweryn Kokot)
Date: Sun, 12 Nov 2006 14:43:32 +0100
Subject: writing wx code in emacs - how to make easier?
Message-ID: <87wt60ye4b.fsf@poczta.po.opole.pl>

Hello,

I would like to write wx code in emacs. For now I'm using python-mode
but I hope they are stuff which make it easier. I mean some
autocompletion or abbrevs of such things as wx.ALIGN* wx.EVT_* ... 

Any ideas?
regards,
SK



From steve at REMOVEME.cybersource.com.au  Tue Nov 14 02:26:29 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 14 Nov 2006 18:26:29 +1100
Subject: to  setattr or def setProp()
References: <1163485203.560900.286430@b28g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.14.07.26.26.698518@REMOVEME.cybersource.com.au>

On Mon, 13 Nov 2006 22:20:03 -0800, jm.suresh at no.spam.gmail.com wrote:

> I have a class for rectangle and it has two points in its __slots__ .
> However, we can derive a number of properties like width, height,
> centerPoint etc from these two points. Now, I want to be able to set
> and get these properties directly from the instances. I can either def
> __setattr__ , __getattr__  or I can define function for each property
> like setWidth(), setHeight() . Which one would be faster? I would
> prefer doing through __setattr__, __getattr__ because it makes the code
> more readable.
> However, speed is a concern I would have to do these operations in few
> thousand iterations for about 50-100 rectangles.

>>> class Rect(object):
...     def __init__(self, a,b,c,d):
...             # too lazy to use slots, sorry
...             self.a, self.b, self.c, self.d = a, b, c, d
...     def _width(self):
...             return self.c - self.a
...     width = property(_width, None, None, None)
...
>>>
>>> r = Rect(1, 2, 3, 4)
>>> r.width
2

Now let's see how fast it runs.

>>> import timeit
>>> timeit.Timer("r.width", "from __main__ import Rect; r = Rect(1,2,3,4)").timeit()
2.3775210380554199

Now you know how to test how fast code runs, you can write some code to
test.


-- 
Steven D'Aprano 



From john106henry at hotmail.com  Sun Nov 19 21:56:53 2006
From: john106henry at hotmail.com (John Henry)
Date: 19 Nov 2006 18:56:53 -0800
Subject: Looking for a graph (as in network, nodes) package
In-Reply-To: <1163986425.634592.240620@h48g2000cwc.googlegroups.com>
References: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
	<1163986425.634592.240620@h48g2000cwc.googlegroups.com>
Message-ID: <1163991413.681324.158630@j44g2000cwa.googlegroups.com>

Learn something new everyday.

Okay, when I run a test program:

import Graph

graph = Graph("1")


I got:

Traceback (most recent call last):
  File "E:\test\Graph\test_graph.py", line 3, in ?
    graph = Graph("1")
TypeError: 'module' object is not callable


Oh, wait....silly me.   Should have been:

from Graph import Graph

<bonk, bonk, bonk>

Must be a Sunday.

Thanks,



E:\test\Graph>

John Machin wrote:
> John Henry wrote:
> > I am looking for a ready made simple graph package.  I found an
> > extensive one in the piana package but when  I try to use just the
> > graph portion, it fails to load because of the line:
> >
> > class Graph(object):
>
> "fails to load" is insufficient information. Please provide the
> traceback and the actual error message.
>
> What version of Python are you using? That line should be OK from
> Python 2.2 onwards.
>
> >  ...
> >
> > It seems that their Graph is subclassed from "object" but I couldn't
> > find a "object" class anywhere.  So, I abandoned using that one.
> >
>
> object is built-in to Python. It is the uber-class from which new-style
> classes inherit.
> New-style classes were introduced in Python 2.2
>
> class Foo(object): # new-style class
> 
> class Bar: # old-style class



From claird at lairds.us  Thu Nov 16 09:28:48 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 16 Nov 2006 14:28:48 +0000
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
Message-ID: <069u24-t0c.ln1@lairds.us>

In article <1163681949.338244.323390 at k70g2000cwa.googlegroups.com>,
Luis M. Gonz?lez <luismgz at gmail.com> wrote:
>> 			.
>> 			.
>> 			.
>> Perhaps it's timely to clarify the "newer" above:  Guido
>> made Python public in '89-90, and Rasmus showed PHP to
>> others in '94-95.
>
>OK. But since when has python been considered a viable alternative for
>web development?
>As a generalp purpose language, it's older.
>But as a web development language, it's olnly when people started to
>look for the "rails killer" and many python alternatives started to
>come up (although Django has been in development for a long time before
>all this hype).
>I remember well, just a few months ago, there were many alternatives
>(remember "subway"?).
>

I appreciate your clarification.  I can report back that we
certainly move in different circles; I, for example, knew of
people with multi-million-dollar budgets deciding on Python-
based Web technology for *serious* applications in '96.  Ruby
1.0, perhaps you'll recall, was a Christmas gift for 1996.
For this and allied reasons, it didn't occur to me to regard
Ruby as the senior "Web development language" among the two.


From shejo284 at gmail.com  Fri Nov 17 07:17:45 2006
From: shejo284 at gmail.com (Sheldon)
Date: 17 Nov 2006 04:17:45 -0800
Subject: C extensions and memory leakage
In-Reply-To: <mailman.327.1163758680.32031.python-list@python.org>
References: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.08.38.17.567889@gmx.net>
	<1163758039.754781.199940@h54g2000cwb.googlegroups.com>
	<mailman.327.1163758680.32031.python-list@python.org>
Message-ID: <1163765865.702947.122090@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:
> Sheldon wrote:
>
> > I am very new at this C extensions in Python so my term wrapper was
> > probably a misnomer. Perhaps glue is better or the interface that
> > allows the exchange of data between Python and C.
> > Yes, I am using python objects in my C extension.
> > Tell me where I can find out more about this reference counters? Or
> > perhaps you can tell something about it.
>
> http://docs.python.org/ext/refcounts.html
>
> </F>

Ok, I understand that I need to allocate and deallocate memory for my
PyObject:

static PyObject* pack_datastruct_to_pyobject(int Row, int Col, int Cat)
{

  PyObject *outobj_lat=NULL;
  PyObject *outobj_lon=NULL;
  PyObject *outobj_msgzenithangle=NULL;
  PyObject *outobj_valconcen=NULL;
  PyObject *outobj_lightcon=NULL;
  PyObject *outobj_fracofland=NULL;
  PyObject *outobj_bias100=NULL;
  PyObject *outobj_bias75=NULL;
  PyObject *outobj_bias50=NULL;
  PyObject *outobj_bias25=NULL;
  PyObject *outobj_stats=NULL;
  PyObject *outobj_percentage=NULL;


  outobj_lat=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.lat15km,Row/res,Col/res,outobj_lat))
    goto fail;
  outobj_lon=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.lon15km,Row/res,Col/res,outobj_lon))
    goto fail;
  outobj_msgzenithangle=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.msgzenithangle15km,Row/res,Col/res,outobj_msgzenithangle))

    goto fail;
  outobj_valconcen=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.valconcen15km,Row/res,Col/res,outobj_valconcen))

    goto fail;
  outobj_lightcon=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.lightcon15km,Row/res,Col/res,outobj_lightcon))

    goto fail;
  outobj_fracofland=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.fracofland15km,Row/res,Col/res,outobj_fracofland))

    goto fail;
  outobj_bias100=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.bias10015km,Row/res,Col/res,outobj_bias100))

    goto fail;
  outobj_bias75=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.bias7515km,Row/res,Col/res,outobj_bias75))

    goto fail;
  outobj_bias50=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.bias5015km,Row/res,Col/res,outobj_bias50))

    goto fail;
  outobj_bias25=PyTuple_New(Row/res*Col/res);
  if
(!createPythonObject_f_2D(work.bias2515km,Row/res,Col/res,outobj_bias25))

    goto fail;

  outobj_stats=PyTuple_New(Cat);
  if (!createPythonObject_f_1D(work.stats,Cat,outobj_stats))
    goto fail;
  outobj_percentage=PyTuple_New(Cat);
  if (!createPythonObject_f_1D(work.percentage,Cat,outobj_percentage))
    goto fail;

  return Py_BuildValue("(OOOOOOOOOOOO)",
		       outobj_lat,outobj_lon,outobj_msgzenithangle,outobj_valconcen,

outobj_lightcon,outobj_fracofland,outobj_bias100,outobj_bias75,
		       outobj_bias50,outobj_bias25,outobj_stats,outobj_percentage);

 fail:
  return NULL;
}
But just how it is done still eludes me. Can you give some help here?

/Sheldon



From kibleur.christophe at gmail.com  Thu Nov 23 04:24:05 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 23 Nov 2006 01:24:05 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.620.1164259740.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<mailman.620.1164259740.32031.python-list@python.org>
Message-ID: <1164273845.755144.154600@f16g2000cwb.googlegroups.com>

I've recently tried the docutils's reST module with Pygments ( to
highlight Python sources), so you can have LaTeX + HTML + PDF output
(You can see what it renders here :
h**p://kib2.free.fr/geoPyX/geoPyX.html ). It worked fine, but needs a
little work to suit your needs (you'll have to write your own CSS, and
maybe your LaTeX preambule ).

For OpenOffice, a friend wrote a little Python script that colourize a
Python source inside a document. I think It will be possible to write
your own for HTML output, but the ooo API docs aren't well documented
for Python.

Chears,
6Tool9



From mail at microcorp.co.za  Mon Nov 20 00:53:22 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 07:53:22 +0200
Subject: edit text in a file and save it again
References: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>
Message-ID: <01c001c70c6b$bf7ca740$03000080@hendrik>

"cyberco" <cyberco at gmail.com> wrote:


> I must be overlooking something here... I'm trying to edit a line in a
> text file. I thought this was easy with fileinput, but all examples do
> not write the line back to the file but simply 'print' it. I want to
> open the file, edit the line and save it again. Is fileinput the right
> module for that?

Don't know about the fileinput module - haven't used it -
- but to change a line in a file, you normally have to 
re write the whole thing - think of what has to happen if 
your editing makes a line longer than what it was before
 - how is it going to fit back into the existing,
smaller space?

And if the editing leaves the line shorter, what must be done 
with the existing space that is "left over" and unused?

the way to change a line in a file is normally:

1) read and copy the lines before the line that must be changed to 
a temporary file
2) read the line that needs to be changed, change it in memory,
and write it to the temp file.
3) read and copy the rest of the lines to the temp file.
4) close the files
5) delete the original
6) rename the temp to the original name.

hth - Hendrik




From mdsteele at gmail.com  Thu Nov 30 14:22:26 2006
From: mdsteele at gmail.com (mdsteele at gmail.com)
Date: 30 Nov 2006 11:22:26 -0800
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
Message-ID: <1164914546.519186.239680@16g2000cwy.googlegroups.com>

John Henry wrote:
> Can I say something to the effect of:
>
> (a,b,c[0:2],d[0:5])=a_list    # Obviously this won't work

Your best bet is probably:

x = [...some list...]
a,b,c,d = x[:1],x[1:2],x[2:5],x[5:]

> I am asking this because I have a section of code that contains *lots*
> of things like this.  It makes the code very unreadable.

Of course, if you're always slicing up lists the same way (say, into
1,1,3,5 element sections) then you could improve readability by writing
a function that takes the list and returns a tuple of the pieces, such
as:

def slice_list(x):
    return x[:1],x[1:2],x[2:5],x[5:]

a,b,c,d = slice_list(first_list)
e,f,g,h = slice_list(second_list)

-Matt



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Nov 23 08:59:10 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 23 Nov 2006 14:59:10 +0100
Subject: Tkinter, main loop question.
References: <1164248529.501106.255990@e3g2000cwe.googlegroups.com>
Message-ID: <4slnpeF10ij2pU2@mid.individual.net>

Exod wrote:

> Don't know if its possible in this light-weight GUI toolset, but
> can i somehow hook up into the mainloop in it, for example if i
> were to create an internet application, i would need to keep
> recieving data from within it?

That's something where you could try the Twisted framework
(http://twistedmatrix.com). Its event loop integrates with many GUI
toolkits', also Tk's.

Regards,


Bj?rn

-- 
BOFH excuse #394:

Jupiter is aligned with Mars.



From schronos at yahoo.com  Wed Nov  8 10:45:10 2006
From: schronos at yahoo.com (__schronos__)
Date: 8 Nov 2006 07:45:10 -0800
Subject: Change directory permission under windows
Message-ID: <1163000710.228610.112020@m73g2000cwd.googlegroups.com>

Hi.

  I would like to add users with full control access to a directory. I
can do it to a file in the following way:

		info=win32security.DACL_SECURITY_INFORMATION
		sd=win32security.GetFileSecurity(DIR, info)
		acl=sd.GetSecurityDescriptorDacl()
		sidUser=win32security.LookupAccountName(None,USER)[0]
		acl.AddAccessAllowedAce(win32file.FILE_ALL_ACCESS, sidUser)
		sd.SetSecurityDescriptorDacl(1, acl, 0)
		win32security.SetFileSecurity(dir, info, sd)

and it work correctly, but if I try to do the same to a directory only
the "special permission" checkbox is checked and this is not useful to
me because I need a "full control" so that files under the directory
can inheritage the directory rigths.

Can anybody help me

Thank's



From deets at nospam.web.de  Mon Nov 13 11:02:16 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Nov 2006 17:02:16 +0100
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
Message-ID: <4rrj89FspqicU1@mid.uni-berlin.de>

rodmc wrote:

> Hi,
> 
> I have installed Fnorb and everything seems to have gone ok. However I
> keep getting the error message below. This is despite the fact that the
> MS CL c++ preprocessor seems to be in PATH. I can type "cl" and
> although I get nothing back in the DOS window, there is also no error
> message.
> 
> Traceback (most recent call last):
>   File "C:\Python24\Lib\site-packages\Fnorb\script\cpp.py", line 53, in
> -toplevel-
>     raise "No C/C++ pre-processor found in your PATH!"
> No C/C++ pre-processor found in your PATH!
> 
> On seeing what information is returned the variables which are
> searching for the presence of CL in PATH come back with nothing.
> 
> System: Windows XP, Python 2.4, Most recent version of Fnorb 1.3.
> 
> Any pointers are welcome. Thanks in advance.

I used omniorb, and have been very satisfied with it. You might consider
switching.

Diez


From ronrsr at gmail.com  Fri Nov 17 01:24:06 2006
From: ronrsr at gmail.com (ronrsr)
Date: 16 Nov 2006 22:24:06 -0800
Subject: determining the bounds of a tuple returned from a database
In-Reply-To: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>
Message-ID: <1163744646.708954.271010@f16g2000cwb.googlegroups.com>

it looks like the  len() function is the one I want.

for:   len(result) - i get 248,

but for len(result[0]) or len(result[1]) i always get 0.


ronrsr wrote:
> here is my result.
> How do I determine the number of tuples in this array, returned from a
> mysql database?
>
> How do I determine the number of characters or entry in each tuple?
>
> thanks very much for your assistance,
>
> -rsr-
>
>
> (('Agricultural subsidies; Foreign aid',), ('Agriculture; Sustainable
> Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
> Development, Birth Defects; Toxic Chemicals',), ('Antibiotics,
> Animals',), ('Agricultural Subsidies, Global Trade',), ('Agricultural
> Subsidies',), ('Biodiversity',), ('Citizen Activism',), ('Community
> Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture, Cotton',),
> ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
> ('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
> Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
> Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
> ('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
> Childhood Development, Birth Defects',), ('Corporate Reform,
> Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
> (Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
> Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
> ('Democracy, Corporate Personhood, Porter Township (Dem. Book)',),
> ('Disaster Relief',), ('Dwellings, Slums',), ('Economics, Mexico',),
> ('Economy, Local',), ('Education, Protests',), ('Endangered Habitat,
> Rainforest',), ('Endangered Species',), ('Endangered Species,
> Extinction',), ('antibiotics, livestock',), ('Pesticides, Water',),
> ('Environment, Environmentalist',), ('Food, Hunger, Agriculture, Aid,
> World, Development',), ('Agriculture, Cotton Trade',), ('Agriculture,
> Cotton, Africa',), ('Environment, Energy',), ('Fair Trade (Dem.
> Book)',), ('Farmland, Sprawl',), ('Fast Food, Globalization,
> Mapping',), ('depression, mental illness, mood disorders',), ('Economic
> Democracy, Corporate Personhood',), ('Brazil, citizen activism, hope,
> inspiration, labor issues',), ('citizen activism, advice, hope',),
> ('Pharmaceuticals, Medicine, Drugs',), ('Community Investing',),
> ('Environment, Consumer Waste Reduction, Consumer Behavior and
> Taxes',), ('Hunger, US, Poverty',), ('FERTILITY, Women',),
> ('Corporatism, Environment',), ('Economic Democracy, Corporate
> Farming',), ('Economic Democracy, Inspiration',), ('FEAR
> (Fearlessness)',), ('Federal budget, military spending, foreign
> cultural exchange programs',), ('Fish Farming',), ('Fish population,
> commercial fishing industry',), ('GMO, BT Cotton',), ('Food borne
> Illness, Water',), ('Food Charity',), ('Food Charity, Urban Farming',),
> ('Food Consumption, Luxury',), ('Food Cost, international',), ('Food
> Disposal, Waste',), ('Food stamps, eligibility for',), ('Food,
> expenditure on',), ('Foreign Aid',), ('Genetics, Food, Agriculture,
> International',), ('Global Policy, Bush Administration',), ('Global
> Trade, food',), ('Global Trade, free trade, clothing',),
> ('Globalization',), ('GMO, SACTO Protests',), ('GMO, Wheat, trade',),
> ('Happiness and income',), ('Health Care - Spending',), ('Hope',),
> ('Hope, inspirational quote',), ('Human Cloning',), ('Hunger',),
> ('Hunger, income',), ('IMF, Argentina',), ('IMF, failings',),
> ('Inequality',), ('INEQUALITY, GLOBALIZATION, POVERTY',), ('Inequality,
> Globalization, Latin America',), ('Inspiration',), ('Junk Food',),
> ('Junk Food, Soft Drinks',), ('Junk Food ,Children, Education,
> Media',), ('Junk Food, Education, Children, Nutrition',), ('Junk Food,
> Global, Coke',), ('Junk Food, McDonald\x92s',), ('Junk Food,
> McDonald\x92s, Global',), ('Junk Food, Soft Drinks, Water',), ('Junk
> Food, Education, Nutrition, Childhood Illness',), ('Junk food,
> Nutrition, Schools',), ('Labor',), ('Labor Issues, Agriculture,
> Sustainable Agriculture Support',), ('Labor Issues, Employee
> Ownership',), ('Land Reform, Brazil, Infant mortality',),
> ('Livestock',), ('Meat',), ('Meat, Brazil, Soybeans, Deforestation',),
> ('Meat, concentration',), ('Meat, Recalls, Contamination',), ('Meat,
> Recalls',), ('Media',), ('Microloans',), ('Military Spending',),
> ('Nutrition Programs, School Meals, Snapple',), ('Nutrition,
> Finland',), ('Obesity',), ('Obesity, Childhood',), ('Obesity,
> Africa',), ('Organic Food',), ('Obesity, Global',), ('Obesity, related
> illnesses',), ('Obesity, related illnesses, children',), ('Oil',),
> ('Organic Agriculture',), ('Organic Agriculture, Growth',), ('Organic
> Agriculture, Nutrition',), ('Organic Agriculture, Productivity',),
> ('Organic food prices',), ('Community',), ('Corporate Concentration',),
> ('Community Gardens, Urban Gardens',), ('Pollution, Air, CO2
> emissions',), ('Population, Water',), ('Poverty, Aid',), ('Poverty,
> World Bank, Hunger',), ('Organic Produce',), ('Organic Produce,
> Farmer\x92s Markets, CSA Community Initiatives (Dem. Book)',),
> ('Pakistan, Education, Poverty, Terrorism',), ('Pesticides',),
> ('Pollution, US',), ('Population, Women',), ('Poverty, Labor Issues',),
> ('t2',), ('Agriculture, Subsidies, Farming, Ranching, Government,
> Livestock, Cattle',), ('School, Farmers\x92 Fresh Produce Food',),
> ('School, Fast Food, Lunch Programs',), ('School, Fast Food, Lunch
> Programs, Harms',), ('Citizens Groups',), ('Public Health, Bacteria',),
> ('Violence, Impotence',), ('Private Food Aid, Food Stamps',), ('Prison
> Rates, Race',), ('Produce, Nutritional content of produce, Historical
> Perspective',), ('Public Opinion',), ('Slavery',), ('Solar, Renewable
> Energy',), ('Suicide',), ('Sustainable agriculture, Moringa tree',),
> ('Sweatshop Labor',), ('Tax Cuts, George W. Bush',), ('Economic
> Democracy (Dem. Book)',), ('Tobacco',), ('Toxic Chemicals',),
> ('Trade',), ('Trade, Agricultural Raw materials',), ('Trade, Coffee',),
> ('Trade, Cotton',), ('Trade, NAFTA, Mexico',), ('Vegetarianism',),
> ('Veterans\x92 Benefits',), ('Violence',), ('Violence, Media,
> Children',), ('Water',), ('Water, Privatization',), ('Welfare
> Reform',), ('Wind, Renewable Energy',), ('Words',), ('World
> Population',), ('World Bank',), ('Grassroots, Community, Living Wage,
> Poverty',), ('Subsidies',), ('Protest, Action',), ('Nuclear Power
> Plants, Emissions',), ('Media, Fear, Religion, George W. Bush',),
> ('Consciousness, Change',), ('Peace, Security, Oil',), ('Globalization,
> Inequality, Commodity prices',), ('Water, Corporate',), ('Consumerism,
> Developing Nations',), ('Nuclear Power, Wind Power',),
> ('Sustainability, Hope',), ('Ozone, CFCs, Chlorine, Atmosphere',),
> ('Hydrogen, Emissions, Ozone',), ('Water, Pesticides',), ('Iraq,
> Military, Health',), ('Toxic Waste Reduction, Toxic Waste Disposal,
> Environmental Regulation, Recycling Electronics',), ('Shareholder
> Advocacy, Social Responsibility, Community Investing (Dem. Book)',),
> ('Fair Trade',), ('Genetically Modified Food, Africa, USAID, ISAAA',),
> ('Sustainability, Progress',), ('Sustainability, Human Rights,
> Globalization, Corporatization',), ('Agricultural Subsidies,
> Agricultural Policy',), ('Agricultural Subsidies, Farmers',), ('Cotton,
> Rice',), ('Agricultural Subsidies, Farmers, Livestock',),
> ('Agricultural Subsidies, Prices',), ('Food scarcity, Hunger, Urban
> Agriculture',), ('GMO farming, Toxic chemicals',), ('Hunger,
> Children',), ('Hunger, Food Insecurity',), ('Inspiration, Corporatism,
> War',), ('Inspiration, Economic Growth',), ('Land Vacancies, US Land
> Reform',), ('Local agriculture, Local produce, Nutritional content of
> local produce',), ('Local produce, Urban agriculture',), ('Pakistan,
> Religion, Education',), ('Pharmaceuticals',), ('Privatization',),
> ('Public panic, Altruism',), ('QA rewrite: citizen activism,
> corporatism-environment, hope, inspiration',), ('Wal-Mart, Food
> Stamps',), ('Socially Responsible Investment, Banking and Environmental
> Initiatives',), ('Terrorism, Suicide Attacks',), ('Agriculture,
> Corporate v. Family Farming',), ('Depression, Health',), ('Depression,
> Health, Employment, Work, Employee',), ('Self-Interest, Vote,
> Altruism',), ('Animal Feed',), ('Corporate Reform (Dem. Book)',),
> ('Economic Growth',), ('Corporate History, Globalization',),
> ('Agriculture',), ('Environment, Public Opinion (Dem. Book)',),
> ('Illiteracy, poverty',), ('Military, Arms Sales',), ('Agriculture;
> Agricultural imports; Global trade',), ('Africa; Foreign aid; Third
> World debt; Loan forgiveness; Jubilee',), ('Foreign aid; Military aid;
> Development aid; Humanitarian aid',), ('Foreign aid; Development
> assistance',), ('Agricultural Subsidies; Foreign aid; Cotton subsidies;
> Africa',))
> >>>



From p.lavarre at ieee.org  Mon Nov 20 18:03:59 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 20 Nov 2006 15:03:59 -0800
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>
	<mailman.8.1163336252.32031.python-list@python.org>
	<1163579122.362383.203240@k70g2000cwa.googlegroups.com>
	<mailman.187.1163579886.32031.python-list@python.org>
Message-ID: <1164063839.318442.100590@k70g2000cwa.googlegroups.com>

> > This idiom makes sense of ordinary Python literals (such as 010, 0x8,
> > 8.125e+0, and "\x45ight") ...
> ...
> sure, but the os module isn't very far away:

So now I think this is true:

"""
FAQ: How should I calculate what numbers and quoted strings mean?

A:

If you know the type of result you want, then you can choose a
corresponding evaluator, such as:

int('0x100', 0x10)
float('1.23e+4')
binascii.unhexlify('4142')
repr('\xA3')[1:-1].decode('string_escape')
repr(u'\u00A3')[2:-1].decode('unicode_escape')

If you need to allow any of a few types of input, then you can call
these evaluators in order of priority, and catch their exceptions.

If you need to allow any type of literal input, then you can resort to
the "limited" shlex or the "slow and dangerous" eval, or call all the
evaluators, or roll your own lexxer.
"""



From ptmcg at austin.rr._bogus_.com  Thu Nov 30 23:19:43 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 01 Dec 2006 04:19:43 GMT
Subject: Is there a reason not to do this?
References: <rNOSPAMon-A5A72A.11585230112006@news.gha.chartermi.net>
	<4t96ujF134nv7U1@mid.uni-berlin.de>
	<rNOSPAMon-D8A387.17003830112006@news.gha.chartermi.net>
	<1164942311.945476.147100@f1g2000cwa.googlegroups.com>
Message-ID: <z3Obh.10535$Gk5.800@tornado.texas.rr.com>

"Carl Banks" <pavlovevidence at gmail.com> wrote in message 
news:1164942311.945476.147100 at f1g2000cwa.googlegroups.com...
>
> A straightforward, Pythonic way to do it would be to create an
> intermediate representation that understands both the existing class
> interfaces and the RDB stuff, but that could lead to synchronizing
> problems and a big hit in performance.  And it's probably a lot of work
> compared to tacking on methods.  OTOH, it could help with hairiness you
> mention.  (I recently did something similar in one of my projects,
> though the intermediary was transient.)
>
I would second Carl's recommendation that you find some way to persist an 
interim version of these expensive-to-create objects, so you can quickly 
load debuggable instances to accelerate your development process.  With 
luck, you can get by with out-of-the-box marshal/unmarshal using the pickle 
module.  We've done this several times in my office with objects that an 
application creates only after some extensive GUI interaction - it just 
slows down development too much without some quick import of debuggable 
instances.

Even though this seems like a sidetrack, it's a pretty direct shortcut, 
without too much unusual technology or design work.

-- Paul




From grebekel at gmail.com  Thu Nov 23 12:06:37 2006
From: grebekel at gmail.com (grebekel at gmail.com)
Date: 23 Nov 2006 09:06:37 -0800
Subject: select() on WinXP
In-Reply-To: <mailman.650.1164299174.32031.python-list@python.org>
References: <1164296300.268074.250230@j44g2000cwa.googlegroups.com>
	<mailman.646.1164296840.32031.python-list@python.org>
	<1164298634.189031.282560@h54g2000cwb.googlegroups.com>
	<mailman.650.1164299174.32031.python-list@python.org>
Message-ID: <1164301597.083332.252630@j44g2000cwa.googlegroups.com>

I patched the code to:

if self.clients:
    r, w, e = select.select(self.clients, [], self.clients, 5)

It works now, thank you Thomas :)



From Eric_Dexter at msn.com  Wed Nov  8 05:11:23 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 8 Nov 2006 02:11:23 -0800
Subject: E-Commerce Partner Program
In-Reply-To: <1162976937.184245.98750@h48g2000cwc.googlegroups.com>
References: <1162976937.184245.98750@h48g2000cwc.googlegroups.com>
Message-ID: <1162980683.782968.199160@e3g2000cwe.googlegroups.com>

I am willing to barter for the space.  I need csoundgrid2.py to be
callable from inside a program just like it is from the command line.
This has been driving me nuts for a couple of weeks.  The program is
part of csoundroutines beta 8.  and the program is called dex tracker
although knowing how to do it is what Im after a simple test program
will work.

https://sourceforge.net/project/showfiles.php?group_id=156455
http://www.dexrow.com


jlicht at gmail.com wrote:
> Just thought that I'd let you know that PricePlay.com has launched an
> awesome Partner Program for all the E-Commerce developers.  All you
> have to do is sign someone up and get paid.
> 
> http://www.priceplay.com/corporate/partners/incentive/signup.cfm



From nogradi at gmail.com  Wed Nov 15 18:33:12 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 16 Nov 2006 00:33:12 +0100
Subject: Useless thread about some useless statistics
Message-ID: <5f56302b0611151533u1537151fk3dd9abd648c2b377@mail.gmail.com>

I recently came across the program 'sloccount' that attempts to
calculate the time and money that went into writing software.
http://www.dwheeler.com/sloccount/

If ran on the source code of python 2.5 the results are the following:

Total Physical Source Lines of Code (SLOC)               = 689,996
Development Effort Estimate, Person-Years                = 191.35
Estimated Average Number of Developers                  = 48.52
Total Estimated Cost to Develop                               = $ 25,848,213
Please credit this data as "generated using David A. Wheeler's 'SLOCCount'."

I'm wondering if the person-years and estimated average number of
developers numbers are accurate or not - not that it's of any
importance, just wondering. And about the 25 million dollars total
price tag, well, ummmmm :)


From ptmcg at austin.rr._bogus_.com  Sun Nov 19 22:05:51 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 20 Nov 2006 03:05:51 GMT
Subject: Not enough arguments for format string
References: <1163991320.262638.154950@j44g2000cwa.googlegroups.com>
Message-ID: <jY88h.892$Gk5.84@tornado.texas.rr.com>

"ronrsr" <ronrsr at gmail.com> wrote in message 
news:1163991320.262638.154950 at j44g2000cwa.googlegroups.com...
> is the error message I'm getting here, on the long formatted print
> statement. .  I've tried adding arguments, in case I missed one, and it
>
>    print """<tr>
>      <td class="pad">%s
>      </td>
>      <td class="pad">%s
>      </td>
>      <td class="pad">%s
>      </td>
>      <td class="pad" align="center"><form action="update.cgi"
> name="updateform" enctype="application/x-www-form-urlencoded"
> method="GET"><input type="hidden" name="zid" value="%d"><input
> type="submit" value="Edit"></form>
>      </td>
>      </tr>
>      """%row['keywords'],row['quotation'],row['citation'],row['zid']
>    print "done printrow xyzzy"

Another technique is to use named string fields in the interpolation format:

print """<tr>
     <td class="pad">%(keywords)s
     </td>
     <td class="pad">%(quotation)s
     </td>
     <td class="pad">%(citation)s
     </td>
     <td class="pad" align="center"><form action="update.cgi"
name="updateform" enctype="application/x-www-form-urlencoded"
method="GET"><input type="hidden" name="zid" value="%(zid)d"><input
type="submit" value="Edit"></form>
     </td>
     </tr>
     """ % row

This style is a bit easier to follow, and later maintain.

-- Paul 




From ladasky at my-deja.com  Thu Nov  2 16:55:04 2006
From: ladasky at my-deja.com (John Ladasky)
Date: 2 Nov 2006 13:55:04 -0800
Subject: Keyboard interrupts, Idle vs. SciTE
Message-ID: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>

Hi there.

The following minimal code in Python 2.3.4 works under Idle v. 1.0.3,
but not under SciTE v. 1.66:

from time import sleep
try:
    while True:
        sleep(0.25)
        print ".",
except KeyboardInterrupt:
    print "\nKeyboard interrupt received.  Exiting program.\n\n"


Under SciTE, I do not get my "exiting program" message.  Instead, I get
the standard SciTE abort message:


>Process failed to respond; forcing abrupt termination...
>Exit code: 1


I much prefer the SciTE environment to Idle.  Is there any way that I
can rewrite my program to restore the keyboard interrupt function under
SciTE?  Alternately, is there some setting that I can change in SciTE
to accomplish the same effect?

Thanks for your input!


+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Ladasky Home Solar, Inc.:  blowing sunshine up your   |
|       power grid since March 24, 2005.  Fiat lux!       |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Uptime    Downtime    kWh generated     kWh consumed  |
|   584 days  6.5 hours       10953            10982      |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+



From gagsl-py at yahoo.com.ar  Sat Nov 18 03:36:20 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 18 Nov 2006 05:36:20 -0300
Subject: How can I speed this function up?
In-Reply-To: <1163837399.869267.20010@m73g2000cwd.googlegroups.com>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<mailman.403.1163827435.32031.python-list@python.org>
	<1163837399.869267.20010@m73g2000cwd.googlegroups.com>
Message-ID: <7.0.1.0.0.20061118053548.03e0c510@yahoo.com.ar>

At Saturday 18/11/2006 05:09, John Machin wrote:

> > If you can assume that all items have 6 numbers, it appears best to
> > unroll the inner iteration.
>
>Is this meant to be some kind of joke?
>If so, you should have festooned it with smilies.
>If not, please proceed straight to http://www.thedailyWTF.com and
>nominate yourself.

...?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From grebekel at gmail.com  Thu Nov 23 11:17:14 2006
From: grebekel at gmail.com (grebekel at gmail.com)
Date: 23 Nov 2006 08:17:14 -0800
Subject: select() on WinXP
In-Reply-To: <mailman.646.1164296840.32031.python-list@python.org>
References: <1164296300.268074.250230@j44g2000cwa.googlegroups.com>
	<mailman.646.1164296840.32031.python-list@python.org>
Message-ID: <1164298634.189031.282560@h54g2000cwb.googlegroups.com>

I'm using it for sockets, it works on linux but not on Windows. The
actual code is something like (server side):

r, w, e = select.select(self.clients, [], self.clients, 5)

where self.clients is a list of accepted sockets.



From michael at stroeder.com  Thu Nov 23 11:11:03 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 23 Nov 2006 17:11:03 +0100
Subject: ldapsearch example in python-ldap?
In-Reply-To: <mailman.638.1164290722.32031.python-list@python.org>
References: <mailman.638.1164290722.32031.python-list@python.org>
Message-ID: <optg34-7gb.ln1@nb2.stroeder.com>

Nico Grubert wrote:
> 
> on a linux machine I am running this ldapsearch from the command line:
> 
> ldapsearch -x -h myldaphost.mydomain.com \
>   -D "CN=ldapuser,CN=Users,DC=mydomain,DC=com" -w "secret" \
>   -b "CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com"
> 
> How can I do this with python-ldap?

http://python-ldap.sourceforge.net/docs.shtml contains some links to
introductions.

This command above boils down to:

l=ldap.initialize("ldap://myldaphost.mydomain.com")
l.simple_bind_s("CN=ldapuser,CN=Users,DC=mydomain,DC=com","secret")
r = l.search_s(
  "CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com",
  ldap.SCOPE_SUBTREE, # this is the default of ldapsearch
  "(objectClass=*)"
)

But you really should learn more about it by diving into:

http://python-ldap.sourceforge.net/doc/python-ldap/ldap-objects.html

Ciao, Michael.


From shejo284 at gmail.com  Fri Nov 17 05:07:19 2006
From: shejo284 at gmail.com (Sheldon)
Date: 17 Nov 2006 02:07:19 -0800
Subject: C extensions and memory leakage
In-Reply-To: <pan.2006.11.17.08.38.17.567889@gmx.net>
References: <1163749907.941949.201880@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.08.38.17.567889@gmx.net>
Message-ID: <1163758039.754781.199940@h54g2000cwb.googlegroups.com>


Marc 'BlackJack' Rintsch wrote:
> In <1163749907.941949.201880 at h48g2000cwc.googlegroups.com>, Sheldon wrote:
>
> > Now I am wondering if the problem is in Python and the wrapper? Does
> > anybody have any idea or experience with this? I am running on
> > Mandrake10 using python 2.3. I am not exactly sure which C wrapper I am
> > using as I have copied it from another person.
>
> What do you mean by "C wrapper"?  You know that Python uses reference
> counters to manage memory and that you are responsible for these counters
> if you are dealing with Python objects in your C extension?
>
> Ciao,
> 	Marc 'BlackJack' Rintsch

I am very new at this C extensions in Python so my term wrapper was
probably a misnomer. Perhaps glue is better or the interface that
allows the exchange of data between Python and C.
Yes, I am using python objects in my C extension.
Tell me where I can find out more about this reference counters? Or
perhaps you can tell something about it.

/Sheldon



From johnjsal at gmail.com  Thu Nov  2 16:14:36 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 13:14:36 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <1162501702.150119.313860@f16g2000cwb.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
	<eidlah$v0m$01$1@news.t-online.com>
	<1162500604.198685.97710@i42g2000cwa.googlegroups.com>
	<1162501702.150119.313860@f16g2000cwb.googlegroups.com>
Message-ID: <1162502076.438629.289560@k70g2000cwa.googlegroups.com>


JohnJSal wrote:
> JohnJSal wrote:
> > Peter Otten wrote:
> >
> >
> > > ...the above is not a 1-tuple, but an ordinary string. You forgot the
> > > trailing comma:
> > >
> > > ('notes',)
> >
> > Right you are! Now it works! :)
> >
> > Thanks!
>
> Oh great, now I've moved on to another issue. It seems that the list
> appending isn't working right. All that gets added to a list is the
> last value, not everything. Am I doing something wrong with the append
> method?

Ah, got it! I was reinitializing the table_values list in the wrong
place



From fredrik at pythonware.com  Fri Nov  3 11:48:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 03 Nov 2006 17:48:10 +0100
Subject: ANN: SE 2.3. Available now
In-Reply-To: <454B6FEC.20709@islandtraining.com>
References: <454B3B49.6070702@vtxmail.ch> <454B6FEC.20709@islandtraining.com>
Message-ID: <eifrs9$gb0$1@sea.gmane.org>

Gary Herron wrote:

> As a matter of polite netiquette, a message like this really ought to
> have a paragraph telling us what SE *is*.    (Unless it's a secret :-))

nah, if you've spent more than five minutes on c.l.python lately, you'd 
noticed that it's the Solution to Everything (up there with pyparsing, I 
think).

</F>



From jeremy at emperorlinux.com  Tue Nov 28 14:13:25 2006
From: jeremy at emperorlinux.com (Jeremy Moles)
Date: Tue, 28 Nov 2006 14:13:25 -0500
Subject: Wrapping A Shell
Message-ID: <1164741205.2573.11.camel@localhost>

I'm not sure if this is really the right place to ask this question, but
since the implementation is in Python, I figured I'd give it a shot.

I want to "wrap" a shell process using popen inside of python program
rather than creating a new shell process for each line I process in the
app. For example, the code might look like:


	std = stdin, stdout, stderr = os.popen3("bash")

	print >> stdin, "ls"

	print stdout.readline()

However, it appears my understanding of popen (or perhaps buffered IO)
is off somewhere, because this certainly doesn't work anything like I
expect it to (it hangs on stdout.readline).

Obviously the example above is very contrived, but eventually I'll be
using this in an OpenGL "terminal" widget. Am I approaching this the
wrong way?



From steve at REMOVEME.cybersource.com.au  Thu Nov 16 22:49:44 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 17 Nov 2006 14:49:44 +1100
Subject: Printing/writing an integer to a file
References: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.com>
	<mailman.301.1163733509.32031.python-list@python.org>
Message-ID: <pan.2006.11.17.03.49.43.861871@REMOVEME.cybersource.com.au>

On Fri, 17 Nov 2006 14:18:12 +1100, Ben Finney wrote:

> The function call syntax doesn't allow a space between the function
> name and the opening parenthesis.

Are you sure? I thought it was allowed but not recommended because it is
hard to read.

>>> len ([1, 2, 3])
3


Seems to work for me.

And if you think that's bad, check out this:

>>> '+'    .    join   (   [  'a'  ,  'b'  ]  )
'a+b'

How to write legal but unreadable code in Python.

-- 
Steven D'Aprano 



From fredrik at pythonware.com  Thu Nov 23 15:31:04 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 21:31:04 +0100
Subject: Trying to understand Python objects
In-Reply-To: <4565f8f7$0$8460$426a74cc@news.free.fr>
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>	<mailman.564.1164158130.32031.python-list@python.org>	<ek4e6j$hfn$1@panix3.panix.com>
	<4565f8f7$0$8460$426a74cc@news.free.fr>
Message-ID: <ek50ea$ukh$1@sea.gmane.org>

Bruno Desthuilliers wrote:

> Don't see it as a religious point please, but I fail to understand why 
> you seem so in love with old-style classes ? new-style classes are the 
> "official" Python object model since 2.2 (which is a few years ago now), 
> and the last mandatory use of them (exceptions...) disappeared with the 
> 2.5. AFAIK, everything you do with old-style classes can be done with 
> new-style ones. FWIW, old-style classes support is now only for backward 
> compat. So *why* insisting on using them ?

to pick a few reasons: the old-style/new-style distinction is com-
pletely irrelevant for people new to the language, attribute access
is slower for new-style classes (!), they'll be default in 3.0 any-
way...

</F>



From e0427417 at student.tuwien.ac.at  Sat Nov 25 16:13:22 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Sat, 25 Nov 2006 22:13:22 +0100
Subject: my small hashlib - using pythons hash-functions
In-Reply-To: <7x7ixjp7c2.fsf@ruckus.brouhaha.com>
References: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>
	<7x7ixjp7c2.fsf@ruckus.brouhaha.com>
Message-ID: <4568b17a$0$11868$3b214f66@tunews.univie.ac.at>

Paul Rubin wrote:
> Mathias Panzenboeck <e0427417 at student.tuwien.ac.at> writes:
>> So, can this code be considered as derived and do I have to put my
>> code under the GPL? I'd like to publish it under something less
>> restrictive, like a BSD style license. But if GPL is the only way,
>> then GPL it is. :)
> 
> Python is not GPL'd but has its own license.  You can make the derived
> work GPL if you want, but it is not required.  You'll have to check
> its terms to see whether you can specifically use the BSD license.
> Simplest might be to just stay with the Python license.

Yes, right. It's PSF.

But the question is: *IS* this derived work? I mean, it's not copied code.
It's the same hashing-logic, which I learned by watching pythons code.

	-panzi


From Peter.Bienstman at ugent.be  Tue Nov  7 14:13:25 2006
From: Peter.Bienstman at ugent.be (Peter Bienstman)
Date: Tue, 7 Nov 2006 20:13:25 +0100
Subject: os.path.exists and unicode filenames
Message-ID: <200611072013.25305.Peter.Bienstman@ugent.be>

Hi,

I'm trying to add support for unicode file names to my application.

I'm running into problems with e.g. the os.path.exists routine, which 
complains if it gets passed a unicode string:

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/mnemosyne/pyqt_ui/main_dlg.py", line 
149, in fileNew
    if os.path.exists(out):
  File "/usr/lib/python2.4/posixpath.py", line 171, in exists
    st = os.stat(path)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 24-29: 
ordinal not in range(128)

I could try encoding the string in utg-8, but then it wouldn't work under 
Windows.

Is there an elegant cross-platform solution for this?

Thanks!

Peter


From Joshua.R.English at gmail.com  Wed Nov 15 12:24:53 2006
From: Joshua.R.English at gmail.com (Joshua.R.English at gmail.com)
Date: 15 Nov 2006 09:24:53 -0800
Subject: How to pass an argument to a python program open in IDLE?
In-Reply-To: <ZMG6h.110$nx.65@lon04-news-philips>
References: <ZMG6h.110$nx.65@lon04-news-philips>
Message-ID: <1163611493.817940.299130@f16g2000cwb.googlegroups.com>



On Nov 15, 7:56 am, tony... at philips.com wrote:
> Hello,
>
> I have open a Python program in the IDLE, but when I select the "run
> module" under "run" menu, it
> does not allow me to pass an argument to my Python program!
> How do you pass an argument to a Python program under the IDLE? Thanks for
> you help!

I'm using Python on an old Mac with the IDE.  I think my solution would
work.

opt_parser = OptionParser()

def myfunc(argstring):
	(self.options,self.args) =
sub_opt_parser.parse_args(argstring.split())
	f not self.args: self.args = "[default arguments]".split()
	...

if __name__=="__main__":
	myfunc(argstring)


This means editing the file every time.  Since I'm on a Mac, I can also
use:
if __name__=="__main__":
	from EasyDialogs import AskString
	args = AskString('Options and Arguments')

	myfunc(args)

I'm not sure how easy this is to implement on other platforms

Josh English
Joshua.R.English at gmail.com
http://www.spiritone.com/~english



From ironfroggy at gmail.com  Wed Nov 29 21:09:28 2006
From: ironfroggy at gmail.com (Calvin Spealman)
Date: Wed, 29 Nov 2006 21:09:28 -0500
Subject: [help] Is it true to call obj.__str__() while executing "print
	obj"?
In-Reply-To: <20061130011050.228691E4003@bag.python.org>
References: <20061130011050.228691E4003@bag.python.org>
Message-ID: <76fd5acf0611291809n6317e159j4d255dafabbda177@mail.gmail.com>

On 11/29/06, Tommy Zong <tzong at sigma-rt.com> wrote:
>
>
>
>
>
>
> Hi,
>
>
>
> I am learning metaclass by reading "Metaclass programming in Python, Part
> 2". I have a question as following and had tried to search from internet and
> also have read the article "Unifying types and classes in Python 2.2" but
> failed to get satisfied answer. Could you please give me any comments to
> enlighten me? Thank you very much.
>
>
>
> {{{
>
> #
>
> #         inheritance         inheritance
>
> # object -------------> type -------------> Printable(Printable.__str__)
>
> #   |                                           .
>
> #   |                                           .
> instantiation
>
> #   |                                           .
>
> #   |                                           v
>
> #    ----------------------------------------> C(?)
>
> #                                               .
>
> #                                               .
> instantiation
>
> #                                               .
>
> #                                               v
>
> #                                              c(?)
>
> #
>
> >>> class Printable(type):
>
> ...   def __str__(cls):
>
> ...     return "This is class %s" % cls.__name__
>
> ...
>
> >>> class C(object):
>
> ...   __metaclass__ = Printable
>
> ...
>
> >>> print C                                       #
> equivalent to print Printable.__str__(C)
>
> This is class C
>
> >>> c = C()
>
> >>> print c                                       #
> equivalent to print C.__str__(c)
>
> <__main__.C object at 0x1870dacc>
>
>
>
> >>> C.__str__
>
> <slot wrapper '__str__' of 'object' objects>
>
> >>> print C
>
> This is class C
>
> }}}
>
>
>
> The question is why Printable.__str__ is invoked while executing "print C"
> but "C.__str__" shows it is resolved as "objct.__str__"?
>
>
>
> Wish I can get reply from you. Really thanks.
>
>
>
> Best Regards,
>
>
>  Tommy Zong
>  Chengdu Jiehua Technologies Co, Ltd.
>  Tel: 86-28-85148500-654
>  Mail: tzong at sigma-rt.com
>  MSN: metalzong at 163.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>

You are defining a metaclass, a class, and an instance of this class.
You are defining a method in the metaclass. When the name is looked up
on any object, if the object has no attribute of that name (no __str__
in this case) the search moves to its type, and from there to each
type in the MRO (method resolution order). When you follow through the
lookup rules, from object to type to supertypes, you see that none of
the metaclasses for any of the classes in your object's MRO comes into
play. Those are types of the types. They come into play when you
lookup an attribute on the types themselves only, not on the instances
of those types.

That is why you see the bahavior you do. Of course, it wouldnt make
sense for this method to be used with the instances, because they
aren't classes, so the message would be incorrect.

-- 
Read my blog! I depend on your acceptance of my opinion! I am interesting!
http://ironfroggy-code.blogspot.com/


From shearichard at gmail.com  Thu Nov 16 23:58:29 2006
From: shearichard at gmail.com (shearichard at gmail.com)
Date: 16 Nov 2006 20:58:29 -0800
Subject: PIL - "despeckle" image ?
Message-ID: <1163739509.324034.177650@m7g2000cwm.googlegroups.com>

Hi - I have some images which I would like to remove specks from using
the PIL. I would like to be able to say that if a pixel is in a blob of
less than n contiguous pixels then all pixels in that blob should be
removed.

The images are 8 bit images with only 0 and 255 values.

I can think of quite crude ways of doing this but I'm sure there are
some smart ways of doing it - would anyone be able to point me in the
right direction ?

Lastly in case it matters the reason I'm doing this is that the images
are scanned images of sheets of papers on which sample signatures have
been placed. Typically the signatures are much smaller than the sheets
of paper so I would like to 'autocrop' the images to remove the white
space around the signature. At some point in the process the images
having picked up small islands of pixels (dust on scanner or paper ?)
which are nowhere near the signature but which are causing my autocrop
efforts to go awry.

Thanks

Richard.



From mccredie at gmail.com  Thu Nov 16 18:37:48 2006
From: mccredie at gmail.com (Matimus)
Date: 16 Nov 2006 15:37:48 -0800
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <1163720268.611923.3180@e3g2000cwe.googlegroups.com>

 Boris wrote:
 > Hi, is there any alternative software for Matlab? Although Matlab is
 > powerful & popular among mathematical & engineering guys, it still
 > costs too much & not publicly open. So I wonder if there's similar
 > software/lang that is open & with comparable functionality, at least
 > for numerical aspect. Thanks!

There is also Scilab. I've only used it a tiny bit but for the task it
worked well. I do know that it has a somewhat restrictive license. It
is open source, but you aren't allowed to modify and redistribute the
source. I get the feeling that some people avoid Scilab but I'm not
sure why. If anybody knows the reason I'd be happy to hear it.

Scilab website: http://www.scilab.org

-Matt



From mike.klaas at gmail.com  Fri Nov 17 19:12:51 2006
From: mike.klaas at gmail.com (Klaas)
Date: 17 Nov 2006 16:12:51 -0800
Subject: dict.reserve and other tricks
In-Reply-To: <1163749896.776736.201510@h48g2000cwc.googlegroups.com>
References: <1163724294.126102.216870@e3g2000cwe.googlegroups.com>
	<1163742923.680092.264030@j44g2000cwa.googlegroups.com>
	<1163749896.776736.201510@h48g2000cwc.googlegroups.com>
Message-ID: <1163808771.596511.106490@h54g2000cwb.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> Klaas:
>
> > Well, you can reduce the memory usage to virtually nothing by using a
> > generator expression rather than list comprehension.
>
> Are you sure? I don't think so. Can you show a little example?

Sorry, that was boneheaded and wrong.

-Mike



From sjmachin at lexicon.net  Sat Nov 25 20:51:22 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 17:51:22 -0800
Subject: Dynamic function execution
In-Reply-To: <8t1n34-qsv.ln1@lairds.us>
References: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>
	<mailman.718.1164469686.32031.python-list@python.org>
	<8t1n34-qsv.ln1@lairds.us>
Message-ID: <1164505882.743528.247230@l39g2000cwd.googlegroups.com>

Cameron Laird wrote:
> In article <mailman.718.1164469686.32031.python-list at python.org>,
> Fredrik Lundh  <fredrik at pythonware.com> wrote:
> >Andy Wu wrote:
> >
> >> def func(seconds = None, minutes = None, hours = None):
> >>     ...
> >>
> >> In my program I can get a string object('seconds', 'minutes', 'hours')
> >> to specify which parameter to use, the problem is I don't know how to
> >> call the function.
> >>
> >> Say I have a string 'minutes' and a integer 30, now I need to call the
> >> func this way: func(minutes = 30), how do I do this?
> >
> >    func(**{"minutes": 30})
> >
> ></F>
> >
>
> Now I'm confused:  what's the advantage of
>
>   def func(seconds = None, minutes = None, hours = None):
>       print seconds
>       print minutes
>       print hours
>
>   func(**{"minutes": 30})
>
> over
>
>   def func(seconds = None, minutes = None, hours = None):
>       print seconds
>       print minutes
>       print hours
>
>   func(minutes = 30)
>
> ?  Or am I missing the point that a better example of what
> Mr. Wu really wants is
>
>   def func(seconds = None, minutes = None, hours = None):
>       print seconds
>       print minutes
>       print hours
>
>   dimension = "minutes"
>   func(**{dimension: 30})
>
> ?

Hi Cameron,

You're on the right track. A better example would have the last two
lines replaced by:

# Simulate obtaining data
argument_name = "minutes"
argument_value = 30
# Then ...
func(**{argument_name: argument_value})

:-)

Cheers,
John



From robert.kern at gmail.com  Mon Nov 27 05:11:17 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 27 Nov 2006 04:11:17 -0600
Subject: --enable-shared, how do i set the rpath?
In-Reply-To: <VRwah.14825$6t.1704@newssvr11.news.prodigy.com>
References: <VRwah.14825$6t.1704@newssvr11.news.prodigy.com>
Message-ID: <ekedkn$hgg$1@sea.gmane.org>

Mark Harrison wrote:
> I've built a python with --enable-shared in order to support mod_python,
> but now I have to set LD_LIBRARY_PATH to $prefix/lib. 
> 
> Worse, it seems mod_python will die on some import statements,
> I'm suspecting ones that need to pull in .so's.

I find that most of my Apache problems stem from incorrect permissions. Make
sure that the user running the Apache process has "read" and "execute"
permissions for the .so's.

-- 
Robert Kern

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



From paddy3118 at netscape.net  Sun Nov 12 01:28:08 2006
From: paddy3118 at netscape.net (paddy3118 at netscape.net)
Date: 11 Nov 2006 22:28:08 -0800
Subject: Lisp additions to Docstring Wikipedia entry?
Message-ID: <1163312888.122915.117290@h48g2000cwc.googlegroups.com>

Hello,
I have just expanded the Wikipedia stub article on docstrings at
http://en.wikipedia.org/wiki/Docstring.
Unfortunately I do not know about Lisp, but took the time to google and
found a link to the GNU Emacs Lisp entry: documentation at:
http://ftp.gnu.org/gnu/Manuals/elisp-manual-20-2.5/html_chapter/elisp_24.html#SEC361
.

If someone, more knowledgeable about Lisp, and interested in Wikipedia
could flesh out the Lisp part...

Thanks for your time.

- Paddy.



From fredrik at pythonware.com  Thu Nov 16 07:25:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 13:25:00 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
Message-ID: <ejhlar$bob$1@sea.gmane.org>

Chas Emerick wrote:

 > might be represented as:
 >
 > <Element a: head='', text='last'>
 >      <Element b: head='first', text='middle'>

sure, and you could use a text subtype instead that kept track of the 
elements above it, and let the elements be sequences of their siblings 
instead of their children, and perhaps stuff everything in a dictionary. 
  such a construct would also be able to hold the same data, and be very 
hard to use in most normal situations.

> If I'm wrong, just chalk it up to the fact that this is the first  
> time I've ever looked at the Infoset spec, and I'm simply confused.   

the Infoset spec *is* the essence of XML; if you don't realize that an 
XML document is just a serialization of a very simple data model, you're 
bound to be fighting with XML all the time.

but ET doesn't implement the Infoset spec as it is, of course: it uses a 
*simplified* model, carefully optimized for the large percentage of all 
XML formats that simply doesn't use mixed content.  if you're doing 
document-style processing, you sometimes need to add an extra assignment 
or two, but unless you're doing *only* document-style processing, ET's 
API gives you a net win.  (and even if you're doing only document-style 
processing, ET's speed and memory footprint gives you a net win over 
most competing technologies).

</F>



From guettli+usenet at thomas-guettler.de  Thu Nov  2 11:10:19 2006
From: guettli+usenet at thomas-guettler.de (Thomas Guettler)
Date: 2 Nov 2006 16:10:19 GMT
Subject: is mod_python borked?
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <4qujjbForic1U1@individual.net>

walterbyrd wrote:

> I am considering python, instead of php, for web-application
> development. I often see mod_python.criticisized as being borked,
> broken, or just plain sucking.
>
> Any truth to any of that?

Hi,

mod_python is Apache/Python Integration. AFAIK you can't use
it with a different webserver.

I use quixote with plain old CGI. It is fast enough for my stuff. If
there is heavy load, I would try SCGI.

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From mc_anjo at tamu.edu  Fri Nov  3 17:22:51 2006
From: mc_anjo at tamu.edu (Chris Smith)
Date: Fri, 03 Nov 2006 16:22:51 -0600
Subject: numpy help
Message-ID: <eigffp$k58$1@sea.gmane.org>

Howdy,

I'm a college student and for one of we are writing programs to
numerically compute the parameters of antenna arrays. I decided to use
Python to code up my programs. Up to now I haven't had a problem,
however we have a problem set where we are creating a large matrix and
finding it's inverse to solve the problem. To invert the matrix I've
tried using numpy.numarray.linear_algebra.inverse and
numpy.oldnumeric.linear_algebra.inverse which both give me the same
error ( I was hoping they called different routines but I think they
call the same one ).


This is the error message I receive:

Traceback (most recent call last):
    File "C:\Documents and Settings\Chris &
Esther\Desktop\636_hw5_2\elen636_hw5_2.py", line 60, in <module>
      matrix_inverse =
numpy.numarray.linear_algebra.generalized_inverse(matrix)
    File
"C:\Python25\lib\site-packages\numpy\oldnumeric\linear_algebra.py", line
59, in generalized_inverse
      return linalg.pinv(a, rcond)
    File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line
557, in pinv
      u, s, vt = svd(a, 0)
    File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line
485, in svd
      a = _fastCopyAndTranspose(t, a)
    File "C:\Python25\lib\site-packages\numpy\linalg\linalg.py", line
107, in _fastCopyAndTranspose
      cast_arrays = cast_arrays + (_fastCT(a.astype(type)),)
TypeError: can't convert complex to float; use abs(z)



I've tried inverting small complex matrices and it worked fine. Does
anyone know why it won't work for this larger matrix? Any ideas how I
can work around this problem and get the correct inverse matrix?

Chris

P.S. elen636_math.py is my personal library of functions I've create to
solve the problem while elen636_hw5_2.py is the program that I'm
actually running

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From steve at REMOVE.THIS.cybersource.com.au  Wed Nov  8 17:33:11 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 09 Nov 2006 09:33:11 +1100
Subject: assigning values in __init__
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
	<4550daa6$0$26446$c3e8da3@news.astraweb.com>
	<mailman.1865.1162939573.11739.python-list@python.org>
	<4551fe01$0$7047$c3e8da3@news.astraweb.com>
Message-ID: <pan.2006.11.08.22.33.10.951744@REMOVE.THIS.cybersource.com.au>

On Wed, 08 Nov 2006 10:55:57 -0500, John Salerno wrote:

> Ben Finney wrote:
>> John Salerno <johnjsal at NOSPAMgmail.com> writes:
>> 
>>> But I do like Steve's suggestion that it's better to be explicit
>>> about each attribute, instead of just accepting a list of numbers
>>> (but I can't help but feel that for some reason this is better,
>>> because it's more general).
>> 
>> If you pass a *mapping* of the "I-might-want-to-add-more-in-the-future"
>> values, then you get both explicit *and* expandable, without an
>> arbitrary unneeded sequence.
>> 
> 
> Do you mean by using the **kwargs parameter? 

Yes, that's what Ben is talking about. 

> If I do this, doesn't it 
> mean that *anything* could be added though? Misspelled words and 
> completely unrelated attributes as well?

**kwargs flexibility carries a risk. You may consider it worthwhile or not.


> Or does this matter as long as you are handling the processing yourself 
> internally and not allowing users access to the Character class?

Only you can decide whether **kwargs' convenience and flexibility
outweighs its risk.


-- 
Steven.



From mh at pixar.com  Sat Nov 25 23:01:53 2006
From: mh at pixar.com (Mark Harrison)
Date: Sun, 26 Nov 2006 04:01:53 GMT
Subject: who is maintainer of xml-rpc module?
Message-ID: <Rk8ah.15023$Sw1.14@newssvr13.news.prodigy.com>

So, I've made a couple of small but useful additions to
the xml-rpc package.  Is there an assigned maintainer
of the package I should communicate with?

I've got the server side running under apache/mod_python, which
is a bit more industrial strength than the simple xmlrpc server,
and a patch for 64 bit int values.

I'd like to get these into wider circulation if possible...
what's the best way to do this?

Many TIA!
Mark

-- 
Mark Harrison
Pixar Animation Studios


From johnjsal at NOSPAMgmail.com  Thu Nov  9 10:28:53 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 09 Nov 2006 10:28:53 -0500
Subject: How to choose the right GUI toolkit ?
In-Reply-To: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
Message-ID: <4553485f$0$12978$c3e8da3@news.astraweb.com>

Nick Craig-Wood wrote:

>>> So, is there another toolkit I should be looking at?
>>  I highly recommend wxPython.
> 
> I'd second that!
> 
> There is a book also
> 
>   "WxPython in Action"

Oh yeah, how could I forget "The Book"! :) It's great to read straight 
through, and also a fantastic reference, and covers just about all there 
is to know to get very far in wxPython.


From arekm at pld-linux.org  Thu Nov  9 02:04:36 2006
From: arekm at pld-linux.org (Arkadiusz Miskiewicz)
Date: Thu, 9 Nov 2006 08:04:36 +0100
Subject: gathering data about running processes - looking for a library
Message-ID: <200611090804.36311.arekm@pld-linux.org>

Hi,

I'm looking for a library (or utility) written in python that would allow me 
to easily access all possible information about currently running processes 
(under Linux). 

Something like /bin/ps os /bin/pstree providing all information in nice way 
(dictionary).

googling doesn't find anything so I guess no one wrote such library at this 
moment and only option left is to parse /proc data.
-- 
Arkadiusz Mi?kiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/


From rpdooling at gmail.com  Mon Nov  6 16:40:02 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 6 Nov 2006 13:40:02 -0800
Subject: sqlite error?
In-Reply-To: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
References: <454fa4dc$0$6987$c3e8da3@news.astraweb.com>
Message-ID: <1162849202.795175.281090@i42g2000cwa.googlegroups.com>

>> self.connection.execute("INSERT INTO Personal (firstName, lastName)
VALUES ?", t)

John,

I'm no expert, but try

self.connection.execute("INSERT INTO Personal (firstName, lastName)
VALUES ?, ?", t)



From tomas at fancy.org  Mon Nov 20 19:52:51 2006
From: tomas at fancy.org (Tom Plunket)
Date: Mon, 20 Nov 2006 16:52:51 -0800
Subject: Programmatically replacing an API for another module
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<39ednaWIOuxepv_YnZ2dnUVZ_omdnZ2d@comcast.com>
Message-ID: <5ni4m291t9ctfsgisus67a5q6gv7blvsjj@4ax.com>

Larry Bates wrote:

> Whatever points to something in Python is what is called.

Right.

> f=abc
> print f(1,2)
> f=efg
> print f(1,2)

Sure.  I realized after posting that what I really wanted to ask was
how to replace an imported module.  Steve's earlier response is akin
to what I'm looking for, although with far too much work.  ;)

> As long as you implement the full API, you can replace functions
> with others quite easily.  Note: this also works with class methods.

Right, I can replace a function at a time:

import os

def my_join(*args):
   return '/'.join(*args)

os.path.join = my_join

...but I'm wondering if there's a straight-forward way to inject the
local list of functions into another module.

What I ran into after posting is that I don't know how to get the
__dict__ for the module's scope; is it available?  I.e. I can do
'print os.path.__dict__', but 'print __dict__' at module scope results
in a NameError since __dict__ is undefined at that scope.  However, if
I could do 'os.path = local_module' somehow, I'd be getting basically
what I want.  Maybe I could just have a my_os_path.py, and in my test
code import it as os.path, and then the other code would see that
os.path is already loaded and not bother doing so again?  Haven't
tried it, am interested in the answer, but I do have enough to work
with for now...  Replacing a module in this way also ensures that I'm
only calling the parts of the API that I intend to call, which is a
handy side-effect.

> Observation: IMHO it is going to be really hard to keep your functional
> shims up to date as you change your REAL functions/methods.  You also
> are testing different code than you are executing which doesn't make
> the unit tests nearly as valuable.

Depends on what all I'm mocking.  If I'm mocking an expensive service
across the internet that is time consuming to connect to, or even
mocking a well-defined system API call that is similarly time
consuming to call, then I can stub something in that doesn't do
anything but validate the arguments.  Additionally, I can "document"
the caveats and possibly-errant behavior with my mock, and
subsequently get automatic testing that I'm dealing with API bugs
properly.

These aren't functional shims, which would imply that they sit in
between two other bits of interesting code under my control.  They're
functional leaves, which are the end point of the operational chain.
E.g. I queue up all of the commands that I'm sending to the database
and verify that they're what I intended to send, and I accept that the
database will interpret those commands as it should.

Thanks for the feedback, regardless,
-tom!


From zhangry at feng.co.jp  Tue Nov 28 03:53:15 2006
From: zhangry at feng.co.jp (HYRY)
Date: 28 Nov 2006 00:53:15 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <ekSah.4317$_H5.2754@tornado.texas.rr.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekSah.4317$_H5.2754@tornado.texas.rr.com>
Message-ID: <1164703995.791873.9790@j44g2000cwa.googlegroups.com>

I think
oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
oarray[0::2] = larray                                    #2
oarray[1::2] = rarray                                    #3
will be executed at C level, but if I use itertools, the program is
executed at Python level. So the itertools version is actually slower
than the original program.
I tested #1,#2,#3. the speed of #2 and #3 is OK, but #1 is slow.
So my question is : are there some methods to create a huge array
without an initializer?



From richard.charts at gmail.com  Mon Nov  6 13:27:06 2006
From: richard.charts at gmail.com (Richard Charts)
Date: 6 Nov 2006 10:27:06 -0800
Subject: RAW network programming under Windows
In-Reply-To: <1162769348.785276.294790@h48g2000cwc.googlegroups.com>
References: <1162759117.346975.255000@f16g2000cwb.googlegroups.com>
	<1162769348.785276.294790@h48g2000cwc.googlegroups.com>
Message-ID: <1162837626.250890.110810@e3g2000cwe.googlegroups.com>


sturlamolden wrote:
> billie wrote:
>
> > RAW network programming under Windows it's not always possible because
> > of the security limitations that microsoft introduced in the latest
> > Windows versions and that affects WinSocket API.
> > On UNIX systems I'm able to freely send raw packets (for example I'm
> > able to compile IP packets with a src address defined by me) through
> > raw socket API, but if I do the same on a Windows system socket module
> > raises an error.
>
> You can try to install "Windows Services for Unix 3.5" (aka SFU 3.5).
> It transforms your Windows into a certified UNIX (not just a Unix
> clone). SFU 3.5 has a full BSD socket API (derived from OpenBSD), not
> just Winsock. As the POSIX subsystem in SFU 3.5 is not layered on top
> of the Win32 subsystem, but talks directly to the NT kernel,
> restrictions in Winsock should not affect the BSD sockets in SFU 3.5.
> This behaviour is different from e.g. Cygwin, where the "Unix APIs" are
> layered on top of the Win32 subsystem.
>
> In any case, I hope you are aware that spoofing IP packets gives you
> bad karma.

Hey, there are a few uses for spoofing source addresses.
Anyway, I didn't know that SHU replaced ( or added to) the stack.
I'll have to give SFU a try.
Thanks.



From multani at free.fr  Mon Nov 13 15:13:01 2006
From: multani at free.fr (Jonathan Ballet)
Date: Mon, 13 Nov 2006 21:13:01 +0100
Subject: Python memory usage
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>
	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>
	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>
	<mailman.87.1163447251.32031.python-list@python.org>
Message-ID: <20061113211301.7894fc78@localhost.localdomain>

Le Mon, 13 Nov 2006 20:46:58 +0100,
Fredrik Lundh <fredrik at pythonware.com> a ?crit :
> 
> http://effbot.org/pyfaq/why-doesnt-python-release-the-memory-when-i-delete-a-large-object
> 
> </F>
> 

Is it still true with Python 2.5 ?

I mean, [http://evanjones.ca/python-memory.html] should fix this
behaviour, doesn't it ?

	Jonathan


From scbauer at gmail.com  Tue Nov 21 19:22:45 2006
From: scbauer at gmail.com (scbauer at gmail.com)
Date: 21 Nov 2006 16:22:45 -0800
Subject: AVL Balancing
Message-ID: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>

Im working on an AVL tree that consists of balancing the tree everytime
you add an object. Im not quite grasping the concept on how to do this
with python. I have seen a few topics on the web about this, and i
clearly understand how when the balance of an AVL tree get to 2 or -2
you have to do a R, L, LR, or a RL rotation. Could anyone possibly help
me/point me in the right direction as far as checking the balance and
actually balancing the tree? Thanks in advance



From tim.peters at gmail.com  Sun Nov  5 08:27:10 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Sun, 5 Nov 2006 08:27:10 -0500
Subject: Is there a commas-in-between idiom?
In-Reply-To: <eiklvo$5uj$1@hefestos.uned.es>
References: <eiklvo$5uj$1@hefestos.uned.es>
Message-ID: <1f7befae0611050527s42dc12cduca097033313451b3@mail.gmail.com>

]Ernesto Garc?a Garc?a]
> it's very common that I have a list and I want to print it with commas
> in between. How do I do this in an easy manner, whithout having the
> annoying comma in the end?
>
> <code>
>
> list = [1,2,3,4,5,6]
>
> # the easy way
> for element in list:
>    print element, ',',
>
> print
>
>
> # this is what I really want. is there some way better?
> if (len(list) > 0):

More idiomatic as

    if len(list) > 0:

and even more so as plain

    if list:

>    print list[0],
>    for element in list[1:]:
>      print ',', element,

Do you really want a space before and after each inter-element comma?

> </code>

An often-overlooked alternative to playing with ",".join() is:

    print str(list)[1:-1]

That is, ask Python to change the list into a big string, and just
strip the brackets off each end:

>>> alist = ['a, bc', 4, True]
>>> print str(alist)[1:-1]
'a, bc', 4, True

Note the quotes around the string element!  This differs from what
your code snippet above would produce (in addition to differing wrt
spaces around inter-element commas):

    a, bc , 4 , True


From skip at pobox.com  Fri Nov 10 09:06:29 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 10 Nov 2006 08:06:29 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <slrnel915m.1r8.horpner@FIAD06.norwich.edu>
References: <slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<slrnel74ak.18g.horpner@FIAD06.norwich.edu>
	<mailman.1999.1163105404.11739.python-list@python.org>
	<xhW4h.4732$L6.380@newsread3.news.pas.earthlink.net>
	<slrnel915m.1r8.horpner@FIAD06.norwich.edu>
Message-ID: <17748.34661.461883.714483@montanaro.dyndns.org>


    Neil> The colon's main purpose seems to be to allow one-liners:

    Neil> Easy to parse: if a < b: a += 1
    Neil> Hard to parse if a < b a += 1

No, as the note from Tim Peters referenced by Robert Kern pointed out
earlier in this thread, the ABC language designers found that
indentation-based block structure by itself wasn't enough to clue new users
in about the code structure.  Adding the colon at the end of the
if/while/for clause helped.

Skip



From bdesth.quelquechose at free.quelquepart.fr  Sun Nov 19 17:57:28 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Nov 2006 23:57:28 +0100
Subject: basic python questions
In-Reply-To: <4s8u91Fumc9aU1@mid.uni-berlin.de>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<pan.2006.11.18.09.33.16.488148@gmx.net>
	<1163868656.416276.277310@m7g2000cwm.googlegroups.com>
	<4s8u91Fumc9aU1@mid.uni-berlin.de>
Message-ID: <4560dc49$0$10440$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> nateastle at gmail.com schrieb:
> 
>> I have taken the coments and think I have implemented most. My only
> 
> 
> Unfortunately, no.
> 
>> question is how to use the enumerator. Here is what I did, I have tried
>> a couple of things but was unable to figure out how to get the line
>> number.
>>
>> def Xref(filename):
>>     try:
>>         fp = open(filename, "r")
>>     except:
>>         raise "Couldn't read input file \"%s\"" % filename
> 
> 
> You still got that I-catch-all-except in there.
> This will produce subtle bugs when you e.g. misspell a variable name:
> 
> filename = '/tmp/foo'
> try:
>    f = open(fliename, 'r')
> except:
>    raise "can't open filename"
> 
> 
> Please notice the wrong-spelled 'fliename'.
> 
> This OTOH will give you more clues on what really goes wrong:
> 
> 
> 
> filename = '/tmp/foo'
> try:
>    f = open(fliename, 'r')
> except IOError:
>    raise "can't open filename"
> 
> 

And this would be still more informative (and not deprecated...):

filename = '/tmp/foo'
f = open(fliename)

Catching an exception just to raise a less informative one is somewhat 
useless IMHO.


From __peter__ at web.de  Fri Nov 24 02:47:11 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 24 Nov 2006 08:47:11 +0100
Subject: How do I find possible matches using regular expression?
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
	<ek3umo$4m5$03$1@news.t-online.com>
	<1164286433.937425.301490@j44g2000cwa.googlegroups.com>
	<1164339180.444298.49680@m7g2000cwm.googlegroups.com>
Message-ID: <ek680p$ntv$03$1@news.t-online.com>

Andy wrote:

> This works well as a checking strategy, but what I want is a suggesting
> list...

Indeed, I was grossly misreading your question.

Peter


From inq1ltd at verizon.net  Mon Nov 20 00:00:22 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 20 Nov 2006 00:00:22 -0500
Subject: Getting value from Tkinter entry widget: variable scope difficulty
In-Reply-To: <a5ddc$45611064$4275d90a$31958@FUSE.NET>
References: <a5ddc$45611064$4275d90a$31958@FUSE.NET>
Message-ID: <200611200000.23100.inq1ltd@verizon.net>


Kevin, 
if the present value of searchterm is what you 
want, I suggest you make a class


class Kgui:
   def __init__(self) :    # init self  
       self.makeGUI()


   def makeGUI(self):

    ###lots of code to set up toplevel windows

      searchbutton=Button(topframe,
      image=searchglass, command=self.doSomething)
      searchbutton.image=searchglass
      searchbutton.pack(side=LEFT,  expand = NO)
    
  # and all the resrt of the code


   def doSomething(self):

     file = os.popen('systemcommand %s' %
                            searchterm, 'r')

     self.searchterm = searchterm

     print self.searchterm #used inside the class

     Kgui.searchterm = searchterm

     print Kgui.searchterm #used outside the class
    



you can also do;
 Kgui.searchterm = self.searchterm = searchterm

I think this is what you are asking for.

jim-on-linux

http://www.inqvista.com








On Sunday 19 November 2006 21:18, Kevin Walzer 
wrote:
> I'm trying to construct a simple Tkinter GUI
> and I'm having trouble with getting the value
> of an entry widget and passing it onto a
> callback function. But I'm not grokking
> variable scope correctly.
>
> I have two functions. Here are the relevant
> excerpts:
>
> def makeGUI():
>
>    ###lots of code to set up toplevel windows
>
>     searchbutton=Button(topframe,
> image=searchglass, command=doSomething)
> searchbutton.image=searchglass
>     searchbutton.pack(side=LEFT,  expand = NO)
>
>     searchterm=StringVar()
>
>     entryterm=Entry(topframe,
> textvariable=searchterm)
> entryterm.pack(side=RIGHT)
>
>     entrylabel=Label(topframe, text="Search:")
>     entrylabel.pack(side=RIGHT)
>
>
> def doSomething():
>
> 	 file = os.popen('systemcommand %s' %
> searchterm, 'r')
>
> 	print searchterm
>
> ---
>
> What I want to happen is the value of
> searchterm to be passed on to the doSomething()
> call when the searchbutton is pressed. Right
> now it appears the value of "searchterm" is
> local to each function.
>
> In Tcl this would be handled by simply
> assigning the variable "searchterm" to the
> global namespace in each function, i.e. "global
> searchterm." I've looked and can't quite figure
> out how to do this in Python. Any advice is
> appreciated.
>
> --
> Kevin Walzer
> Code by Kevin
> http://www.codebykevin.com


From ajikoe at gmail.com  Wed Nov 15 03:00:36 2006
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 15 Nov 2006 00:00:36 -0800
Subject: reading csv problem
In-Reply-To: <ejec98$mh6$1@enyo.uwa.edu.au>
References: <1163570877.075189.174670@m73g2000cwd.googlegroups.com>
	<ejec98$mh6$1@enyo.uwa.edu.au>
Message-ID: <1163577636.524053.190540@i42g2000cwa.googlegroups.com>

Thank you.


On Nov 15, 1:33 pm, Cameron Walsh <cameron.wa... at gmail.com> wrote:
> aji... at gmail.com wrote:
> > Hello,
>
> > I use csv to take information from file.
> > import csv
> > reader = csv.reader(open('t.csv'))
>
> > for row in reader:
> >     print row # it is perfectly OK
>
> > ---------------------------------------------------------------------
> > But If I use this code I have problem
> > import csv
> > reader = csv.reader(open('t.csv'))
>
> > for row in reader:
> >     print row # it is perfectly OK
> > for row in reader:
> >     print row # it is not printed on the monitor???
>
> > Why does only the first print row work here?
>
> > TIA,
> > ajikoeBecause reader is an iterator and has no means of going back to its
> beginning.
>
> You could make a list out of it:
> lines = list(csv.reader(open('t.csv')))
> for row in lines:
>   print row
> for row in lines:
>   print row
> 
> Hope it helps,
> 
> Cameron.



From sturlamolden at yahoo.no  Sun Nov 12 12:11:15 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Nov 2006 09:11:15 -0800
Subject: numpy/scipy: correlation
In-Reply-To: <ej7hsu$gil$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
Message-ID: <1163351475.742836.311180@h48g2000cwc.googlegroups.com>


First, are you talking about rounding error (due to floating point
arithmetics) or statistical sampling error?

If you are talking about the latter, I suggest you look it up in a
statistics text book. E.g. if x and y are normally distributed, then

t = r * sqrt( (n-2)/(1-r**2) )

has a Student t-distribution with n-2 degrees of freedom. And if you
don't know how to get the p-value from that, you should not be messing
with statistics anyway.



From cemerick at snowtide.com  Sat Nov 18 21:59:01 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Sat, 18 Nov 2006 21:59:01 -0500
Subject: What do I look for in a shared Python host?
In-Reply-To: <e75321bd0611181525k51fd8830pdc9fca7f3d9e690d@mail.gmail.com>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
	<1163877328.071239.191260@f16g2000cwb.googlegroups.com>
	<e75321bd0611181525k51fd8830pdc9fca7f3d9e690d@mail.gmail.com>
Message-ID: <3D2874A8-537D-45AA-960C-F712E1301B60@snowtide.com>

On Nov 18, 2006, at 6:25 PM, dimitri pater wrote:

> Hi,
> is there any reason for you wanting to use a shared host? Just  
> asking..
> Maybe you could use a VPS as this is not too expensive these days.  
> Of course, it would require more work to set things up. But it's  
> not too hard... (eg using apt-get,webmin,some basic Linux skills  
> using the command line)
> regards,
> Dimitri
> (I use a VPS at rimuhostig ($20/month), but there are many, many more)

I would absolutely second rimuhosting.  We have a bunch of VPS' and  
dedicated boxes there, and they've been great.  As Dimitri suggests,  
you can get a $20/mo VPS that would do straightforward web hosting  
without a problem (certainly what you could get out of a shared  
account at most service levels).

- Chas


From dlenski at gmail.com  Thu Nov  9 17:55:41 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 9 Nov 2006 14:55:41 -0800
Subject: Simple question to split
In-Reply-To: <4rhov8Frk45nU1@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
Message-ID: <1163112941.100287.188880@b28g2000cwb.googlegroups.com>

Yep, use regular expressions!  For example, use the regular expression
r',|\s+' to split on either (a) any amount of whitespace or (b) a
single comma.  Try this:

import re
a='1,2,3,4,5 6 7,3,4'
print re.split(r',|\s+*', a)

Matthias Winterland wrote:
> Hi,
>
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a
> single split-call?
> 
> Thx,
> Matthias



From kw at kevin-walzer.com  Thu Nov 16 08:16:26 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Thu, 16 Nov 2006 08:16:26 -0500
Subject: Tkinter & Python 2.5 Problems on MAC OS 10.3.9
In-Reply-To: <mailman.246.1163675475.32031.python-list@python.org>
References: <mailman.246.1163675475.32031.python-list@python.org>
Message-ID: <455C64AA.60705@kevin-walzer.com>

Thomas Ploch wrote:
> Hello folks,
> 
> Since this is my first post on the list, a brief introduction of myself.
> 
> My name is Thomas, I am 26 years old, I am a student of Computational
> Linguistics and I am a python user. :-)
> 
> Now my problem:
> 
> I have Tcl/Tk 8.4.4 installed:
> 
> iPimpG4:~ profipimp$ tclsh
> % info patchlevel
> 8.4.4
> %
> 
> But when I try to import Tkinter
> 
>>>> import Tkinter
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",
> line 38, in <module>
>     import _tkinter # If this fails your Python may not be configured
> for Tk
> ImportError: dlcompat: dyld:
> /Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
> can't open library: /Library/Frameworks/Tk.framework/Versions/8.4/Tk 
> (No such file or directory, errno = 2)
> 
>>>>
> 
> ...this happens.
> 
> Why?
> 
> Tkinter worked perfectly with 2.3 and 2.4...
> 
> Cheers,
> Thomas

Where is your installation of Tcl/Tk? It sounds like Python can't find it.

Were you using the standard MacPython builds previously, or Unix-based
builds from Fink or DarwinPorts?

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


From aafshar at gmail.com  Wed Nov 22 14:01:48 2006
From: aafshar at gmail.com (od)
Date: 22 Nov 2006 11:01:48 -0800
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <45605f00$0$5732$426a74cc@news.free.fr>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
	<20061118190822.GB19739@phd.pp.ru>
	<20061118192248.GB29614@58sirius016.dc.ukrtel.net>
	<mailman.456.1163938028.32031.python-list@python.org>
	<45605f00$0$5732$426a74cc@news.free.fr>
Message-ID: <1164222108.467257.15870@h48g2000cwc.googlegroups.com>


tool69 wrote:

> Sorry, but did someone knows if Pida works under Windows ?
> Thanks.

No, it doesn't really. You can start it up with a bit of hacking, and I
have seen screenshots around, but only with the scintilla-based editor.
We are waiting for SVG support in GTK on windows. Writing a vim-windows
(non-embedded) plugin should be a trivial matter, but then we need some
brave Windows user to do it).

Ali



From trentm at activestate.com  Tue Nov 28 17:15:01 2006
From: trentm at activestate.com (Trent Mick)
Date: Tue, 28 Nov 2006 14:15:01 -0800
Subject: pyxpcom
In-Reply-To: <cg%ah.268$Gf6.11@newsfe21.lga>
References: <QhHah.226$YX1.85@newsfe23.lga>	<mailman.809.1164736366.32031.python-list@python.org>
	<cg%ah.268$Gf6.11@newsfe21.lga>
Message-ID: <456CB4E5.2030402@activestate.com>

> My need is as follows: I have developed an activex component to access a
> smart card on the client side / do some web site logon.
> 
> Are xpcom / pyxpcom advanced/stable enough for such an implementation
> under Linux / Windows ?

You mean to provide the equivalent functionality for Firefox that your activex 
component does for IE? Yes, xpcom and pyxpcom are quite stable, however 
putting together a Firefox extension that gets PyXPCOM itself up and running 
in a client's Firefox install will be quite challenging.

Trent

-- 
Trent Mick
trentm at activestate.com


From srikrishnamohan at gmail.com  Tue Nov 14 06:40:58 2006
From: srikrishnamohan at gmail.com (km)
Date: Tue, 14 Nov 2006 17:10:58 +0530
Subject: __init__.py
In-Reply-To: <ejc8vi$sip$1@sea.gmane.org>
References: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com>
	<ejc8vi$sip$1@sea.gmane.org>
Message-ID: <f4cc03640611140340q22d7f3e6pb9092148fa890347@mail.gmail.com>

Hi,

I have a structure like this :
foo/__init__.py
foo/bar/__init__.py
foo/bar/firstmodule.py
foo/abc/__init__.py
foo/abc/secondmodule.py

now i have some variables (paths to data files) common, to be used in
first module
and second modules respectively.
can i set those variables in foo/__init__.py so that i can access them by
foo.mypath1 in first and second submodule class definitions?  if not
anyother way out ?
regards,
 KM

On 11/14/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>
> km wrote:
>
> > what is the use of __init__.py file in a module dir ?
>
> it tells Python that the directory is a package directory.  if you have
>
>      mydir/foo/__init__.py
>      mydir/foo/module.py
>
> and mydir is on the path, you can do "import foo.module" or "from foo
> import module".  if you remove the __init__.py file, Python will no
> longer look for submodules inside that directory.
>
> > Is it used to initialize variables  that could be shared across sub
> > modules  if set in __init__.py at root dir  of module ?
>
> it's usually empty, or used to export selected portions of the package
> under more convenient names.  given the example above, the contents of
> the __init__ module can be accessed via:
>
>      import foo
>
> </F>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From python-url at phaseit.net  Mon Nov 27 12:04:28 2006
From: python-url at phaseit.net (Paul Boddie)
Date: Mon, 27 Nov 2006 17:04:28 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov 27)
Message-ID: <ekf5qs$4n1$1@lairds.us>

QOTW:  "Given these criteria, my recommendations for a first programming
language would be Python or Scheme." - Peter Norvig (some time ago, but
referenced on comp.lang.lisp this week)
    http://www.norvig.com/21-days.html

"however if you want more visual effect with less hassle, consider learning 
Python instead. with Python you can get some graphical stuff working almost 
out-of-the box, while with Lisp it's matter of luck if particular thing will 
work on your system :)." -- Alex Mizrahi (on comp.lang.lisp)
    http://groups.google.com/group/comp.lang.lisp/msg/7a30146ff97f79b1


    Those in California get to hear what Python's "benevolent dictator" 
    does in his day job:
        http://groups.google.com/group/comp.lang.python.announce/browse_frm/thread/f09ffd3e7200e06f/
    
    ...something which isn't fully explained in the Google Master Plan:
        http://www.larsen-b.com/Article/246.html
    
    And for the sake of intercontinental relevance, our European pick of 
    events has to be the Plat_Forms Web development contest in Germany:
        http://groups.google.com/group/pylons-discuss/browse_frm/thread/2330ada0c8e5605c/
    ... although RuPy also certainly deserves attention:
	http://rupy.wmid.amu.edu.pl/
    
    (November 30th is a big day: it's the Plat_Forms registration deadline
    *and* Guido's talk, as well as the last day of Ingeniweb in Paris, ...)
    
    "Pitivi is written in Python and as such should be an easy project for 
    developers to get started with." Apparently, the non-linear video editor
    in question could really move forward "if more python hackers came onboard
    to help out":
        http://blogs.gnome.org/view/uraeus/2006/11/22/0
        http://www.pitivi.org/
    
    Or if your interest is in audio editing, the Python/GTK/GNOME-based
    Jokosher might welcome your contributions:
        http://www.jokosher.org/contribute

    A fledgling free PDF journal appears.
        http://pythonpapers.org/     
    
    November's installment of the language popularity contest quickly leads
    to an investigation into the coherency of Python's Web programming
    options:
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/02875f58a917c04d
    
    Fundamental questions about the nature of time seem to arise when one is 
    "blazin' some mad chronix":
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/95b64b889bef4c46
    
    Meanwhile, potentially better use of time can sometimes be achieved by 
    compiling inline C code at runtime, using cinpy (C in Python) and the 
    remarkable tcc (Tiny C Compiler):
        http://www.cs.tut.fi/~ask/cinpy/
    
    And for those who want to pretend they're writing Python whilst really
    writing C++, pyplus maintains the illusion:
        http://www.imitationpickles.org/pyplus/
    
    But without resorting to the joys of C++, some of those desirable
    "compile-time" checks can be run on Python source code, too, thanks to
    pylint:
        http://groups.google.com/group/comp.lang.python.announce/browse_frm/thread/36a06d611e9a6363/
    
    Advice about moving from Matlab to Python isn't in short supply this week:
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/a71af37fd9372868/
    
    


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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From walterbyrd at iname.com  Thu Nov  2 16:00:23 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 2 Nov 2006 13:00:23 -0800
Subject: is mod_python borked?
In-Reply-To: <1162481212.495984.101510@m73g2000cwd.googlegroups.com>
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
	<1162481212.495984.101510@m73g2000cwd.googlegroups.com>
Message-ID: <1162501223.324957.243750@h54g2000cwb.googlegroups.com>

Shreekar Patel wrote:

> No, I've been using mod_python for a long time, and I haven't run in to
> any problems. In fact I use python server pages for my web development,
> which is much faster than python cgi scripts.
>


Researching further, it looks to me like mod_python may only work well
on apache 2.X. I noticed that django only works with apache 2.X, and
I'm not sure about turbogears. (btw: it always annoys me when I can't
find the system requirements for a project. Those requirements should
be easy to find. I shouldn't have to google for two hours, and post to
several forums).

If I'm right about mod_python only working well with apache 2.x, then I
think that's a shame, because few web-hosters use apache 2.x.



From Leo.Kislov at gmail.com  Wed Nov 15 08:24:47 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 15 Nov 2006 05:24:47 -0800
Subject: Problem reading with bz2.BZ2File(). Bug?
In-Reply-To: <1163593020.979114.73260@i42g2000cwa.googlegroups.com>
References: <1163591526.029090.321390@i42g2000cwa.googlegroups.com>
	<mailman.191.1163592523.32031.python-list@python.org>
	<1163593020.979114.73260@i42g2000cwa.googlegroups.com>
Message-ID: <1163597087.396826.274580@k70g2000cwa.googlegroups.com>

Clodoaldo Pinto Neto wrote:
> Fredrik Lundh wrote:
> > Clodoaldo Pinto Neto wrote:
> >
> > > The offending file is 5.5 MB. Sorry, i could not reproduce this problem
> > > with a smaller file.
> >
> > but surely you can post the repr() of the last two lines?
>
> This is the output:
>
> $ python bzp.py
> line number: 588317
> '\x07'
> ''

Confirmed on windows with 2.4 and 2.5:

C:\p>\Python24\python.exe bzp.py
line number: 588317
'\x1e'
''

C:\p>\Python25\python.exe bzp.py
line number: 588317
'\x1e'
''

Looks like one byte of garbage is appended at the end of file. Please
file a bug report. As a workaround "rU" mode seems to work fine for
this file.

  -- Leo



From george.sakkis at gmail.com  Tue Nov 21 20:20:34 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 21 Nov 2006 17:20:34 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<0VM8h.17686$B31.14012@newssvr27.news.prodigy.net>
Message-ID: <1164158434.139294.102910@e3g2000cwe.googlegroups.com>

James Stroud wrote:

> walterbyrd wrote:
> > Reading "Think Like a Computer Scientist" I am not sure I understand
> > the way it describes the way objects work with Python.
> >
> > 1) Can attributes can added just anywhere? I create an object called
> > point, then I can add attributes any time, and at any place in the
> > program?
>
> Not all objects behave this way. For example, incidences of the object
> class:
>
> (snipped)
>
> > Then attributes are added at some other time?
>
> Yes. This goes for old (clasobj) and new style classes.
>
> (snipped)
>
>I think this flexibility is part the python philosophy, but I am not a python
> philosopher (nor was I meant to be).

Neither a python tutor, apparently, but strong candidate for the
monthly "most confusing-to-a-newbie reply" award.

George



From mike.klaas at gmail.com  Wed Nov 22 19:02:21 2006
From: mike.klaas at gmail.com (Klaas)
Date: 22 Nov 2006 16:02:21 -0800
Subject: utf - string translation
In-Reply-To: <4564dd7b$0$1349$834e42db@reader.greatnowhere.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
	<1164226304.119425.206380@h54g2000cwb.googlegroups.com>
	<1164232741.215312.322990@k70g2000cwa.googlegroups.com>
	<4564dd7b$0$1349$834e42db@reader.greatnowhere.com>
Message-ID: <1164240141.864918.41640@f16g2000cwb.googlegroups.com>

David H Wild wrote:
> In article <1164232741.215312.322990 at k70g2000cwa.googlegroups.com>,
>    John Machin <sjmachin at lexicon.net> wrote:
> > So why do you want to strip off accents? The history of communication
> > has several examples of significant difference in meaning caused by
> > minute differences in punctuation or accents including one of which you
> > may have heard: a will that could be read (in part) as either "a chacun
> > d'eux million francs" or "a chacun deux million francs" with the
> > remainder to a 3rd party.
>
> The difference there, though, is a punctuation character, not an accent.

It's not too hard to imagine an accentual difference, eg:

Le soldat prot?ge avec le fusil --> the soldier protects with the gun
Le soldat prot?g? avec le fusil --> the soldier who is protected by
the gun (perhaps a cannon)

Contrived example, I realize, but there are scads of such instances.
(Caveat: my french is also very rusty).

-Mike



From python.list at tim.thechases.com  Mon Nov 20 14:31:09 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 20 Nov 2006 13:31:09 -0600
Subject: Help!!!  New to Python and getting an error I can't figure out
In-Reply-To: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <4562027D.6040807@tim.thechases.com>

> I'm learning python and from a book I tried this program: (all the
> indentation is there just doen't appear in this EMail)
> ----------------------------------------------------------
> if __name__ == "__main__":
>  (g = dirGrep("c:\\winnt"))
> 
> When I try to run the program - python grep.py - I get the following error:
> 
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax

I suspect it has to do with the funky (useless? unneeded? 
worthless? broken? borked? crack-smokin'?) parens around the 
non-statement in the subsequent (#29) line.

The error is a little misleading, as there's nothing wrong with 
line #28 per-se, but rather the following line.

-tkc





From ratchetgrid at googlemail.com  Sat Nov 25 09:05:27 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sat, 25 Nov 2006 14:05:27 +0000
Subject: Graph Data Structures
Message-ID: <676224240611250605hc890cc7ia41b81392c198e8a@mail.gmail.com>

Hi All,

Currently I am working on a generic graph library  so I can do various
graph based analysis for various projects I have ideas for. Currently
I am implementing Graph as a wrapper around a dictionary. Currently my
implementation works like this:

        t = Graph()
        n1 = Node("Node1")
        n2 = Node("Test2")
        edge1 = Edge("Test3")
        t += n1                                    { n1:{}}
        t[n1][n2] = edge1                    { n1:{n2:edge1}

However this isnt actually ending up with the structure I want. I want
it to finally end up as ......            { n1:{n2:edge1}, n2:{}}. Is
there anyway I can do this simply????

Also I am looking at having a large graph and was wondering if anyone
knew of anyway I could reduce the memory requirements of this
structure and improve the speed of queries on it. I m thinking writing
a C extension for it....is this a good idea and where would I start?
Or does Python have some kind of transparent memory access module I
can implement.

Many Thanks in advance,

Nathan

PS.....Please find my code below:

class Graph(object):
        def __init__(self, g= { } ):
                self.graph = g
        def __iadd__(self, p):
                if p not in self.graph:
                        self.graph[p] = PathsDict()
                return self
        def __getitem__(self, p):
                try:
                        return self.graph[p]
                except KeyError:
                        raise KeyError( "%s not in graph" %(repr(p)) )
        def __str__(self):
                return str(self.graph)
        def filter(self, filter):
                pass

class PathsDict(object):
        def __init__(self):
                self.paths = { }
        def __setitem__(self, p, val):
                if p not in self.paths:
                        self.paths[p] = val
        def __getitem__(self, p):
                return self.paths[p]
                # catch exception here
        def paths(self):
                for k, v in self.paths:
                        yield (k, v)
        def edges(self):
                return self.paths.values()
        def __str__(self):
                return str(self.paths)
        def __len__(self):
                return len(self.paths)

class Node(object):
        def __init__(self, name):
                self.name = name
        def __str__(self):
                return self.name

class Edge(dict):
        def __init__(self, name, weight = 1):
                self["name"] = name
                self["weight"] = weight
        def __str__(self):
                return self["name"]


From michele.simionato at gmail.com  Mon Nov 13 11:33:31 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 13 Nov 2006 08:33:31 -0800
Subject: handling many default values
In-Reply-To: <e0r5h.165$5F2.28@trnddc04>
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
	<pan.2006.11.11.14.04.33.220606@REMOVE.THIS.cybersource.com.au>
	<e0r5h.165$5F2.28@trnddc04>
Message-ID: <1163435611.128470.146660@f16g2000cwb.googlegroups.com>

Alan Isaac wrote:
> Also, as an aside, no one objected to using
>     self.__dict__.update(kwargs)
> in the __init__ function of the parameter holding class.

It is a common trick, also shown in the Python cookbook, IIRC. If you
are anal about
double underscores, you can also use

vars(self).update(kwargs)

              Michele Simionato



From sjmachin at lexicon.net  Thu Nov 30 22:15:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 19:15:54 -0800
Subject: Open and closing files
In-Reply-To: <mailman.910.1164940276.32031.python-list@python.org>
References: <mailman.910.1164940276.32031.python-list@python.org>
Message-ID: <1164942954.646364.143010@h54g2000cwb.googlegroups.com>


Thomas Ploch wrote:
> Is it defined behaviour that all files get implicitly closed when not
> assigning them?
>
> Like:
>
> def writeFile(fName, foo):
> 	open(fName, 'w').write(process(foo))
>
> compared to:
>
>
> def writeFile(fName, foo):
> 	fileobj = open(fName, 'w')
> 	fileobj.write(process(foo))
> 	fileobj.close()
>
> Which one is the 'official' recommended way?

No such thing as an 'official' way.

Nothing happens until the file object is garbage-collected. GC is
generally not under your control.

Common sense suggests that
(a) when you are reading multiple files, you close each one explicitly
(b) when you are writing a file, you close it explicitly as soon as you
are done with it. That way you can trap any error condition and do
something moderately sensible -- better than getting an error condition
during GC when your Python process is shutting down.

HTH,
John



From lisa.engblom at gmail.com  Mon Nov 27 13:17:57 2006
From: lisa.engblom at gmail.com (lisa.engblom at gmail.com)
Date: 27 Nov 2006 10:17:57 -0800
Subject: python skipping lines?
Message-ID: <1164651477.588728.294490@14g2000cws.googlegroups.com>

Hi,

I've just started programming in python, and have run into an
unexpected problem.  I am using python to pull text data from some csv
files.  I have one file that has the important identifiers (name, etc)
and other files with lots of other data.  I wrote a function that takes
the file name and identifiers as inputs, selects the data I need, and
outputs it to another file.  This function (PullData) seems to work
fine.

In the same .py file, but separate from the function, I entered used
"for line in file" to step through each line in my identifier file and
feed the identifiers into my PullData function.  It works fine for the
first entry in my identifier file, but it will not call the function
again.  It will execute lines before or after the appropriate number of
times given the number of lines in the identifier file.  i just put in
a dummy counter variable to try to figure out why it wasn't working)
... but it always skips the function call after the first line.

Any ideas of what could be the problem?



From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 19:43:05 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 01:43:05 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163605059.270769.293290@m73g2000cwd.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
Message-ID: <455baf21$0$28561$426a74cc@news.free.fr>

walterbyrd a ?crit :
> Luis M. Gonz?lez wrote:
> 
>>the new crop of web frameworks (Django, Turbo Gears, etc...).
>>
>>
>>>- Newer versions of mod_python require Apache 2.0, which few hosters
>>>have
>>
>>You can also get alder versions of mod_python. What's the problem?
> 
> 
> The problem is that the system requirements for django and turbogears
> are sky-high. I think Django requires Apache 2.0 (and maybe mod_python
> 3.x),  and CherryPy (part of turbogears) requires Python 2.4.

Yes. Neither Apache 2.0 nor mod_python 3.x nor Python 2.4 are really 
bleeding edge, you know.

> If you are
> developing for a hosted environment, this can be a big problem. Few
> enough hosters provide python to begin with, then add to that such
> requirements as apache 2.0 - and you left with almost nothing.

You mean there are web hosting companies that are still using Apache 
1.3.x ?

C'mon, let's be serious. I just ordered a dedibox - a small dedicated 
web server - for my personal use. It's only 30 euros a month, you know...


From dave.opstad at monotypeimaging.com  Thu Nov  9 10:23:16 2006
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Thu, 09 Nov 2006 07:23:16 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
Message-ID: <dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>

In article <1163027401.386603.263030 at k70g2000cwa.googlegroups.com>,
 p.lavarre at ieee.org wrote:

> Can Python not express the idea of a three-byte int?
> 
> For instance, in the working example below, can we somehow collapse the
> three calls of struct.pack into one?
> 
> >>> import struct
> >>>
> >>> skip = 0x123456 ; count = 0x80
> >>>
> >>> cdb = ''
> >>> cdb += struct.pack('>B', 0x08)
> >>> cdb += struct.pack('>I', skip)[-3:]
> >>> cdb += struct.pack('>BB', count, 0)

Why not something like this:

skip += struct.pack(">L", skip)[1:]

Dave


From ladasky at my-deja.com  Fri Nov  3 12:02:54 2006
From: ladasky at my-deja.com (John Ladasky)
Date: 3 Nov 2006 09:02:54 -0800
Subject: Keyboard interrupts, Idle vs. SciTE
In-Reply-To: <eifiml$ogp$1@news.albasani.net>
References: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
	<eifiml$ogp$1@news.albasani.net>
Message-ID: <1162573374.023980.285880@m73g2000cwd.googlegroups.com>

Thanks Robert, I just poked around and found a PythonWin web page:

http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/pywin32/html/pythonwin/readme.html

>From other links it appears that SciTE was based on PythonWin, and not
the other way around.  For people coding in other languages besides
Python, switching from SciTE to PythonWin might be a step backward.
But probably not for me.  I'll give it a try.

+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Ladasky Home Solar, Inc.:  blowing sunshine up your   |
|       power grid since March 24, 2005.  Fiat lux!       |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
|   Uptime    Downtime    kWh generated     kWh consumed  |
|   584 days  6.5 hours       10953            10982      |
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+



From jweida at gmail.com  Sat Nov  4 08:22:15 2006
From: jweida at gmail.com (Jerry)
Date: 4 Nov 2006 05:22:15 -0800
Subject: py2exe questions
In-Reply-To: <eii0i8$82i$1@news.albasani.net>
References: <fj2nk25koooob09evqk054h35jrb3ar0or@4ax.com>
	<454BB574.9030607@websafe.com>
	<mailman.1742.1162594159.11739.python-list@python.org>
	<eii0i8$82i$1@news.albasani.net>
Message-ID: <1162646535.744282.95290@m7g2000cwm.googlegroups.com>

The McMillan (sp?) Python Installer has recently been resurrected as
well, though now, it is just called PyInstaller and can be found at
http://pyinstaller.python-hosting.com/

It allows you to create a one file distributable without the need to go
back to Python2.3.

Despite what everyone is saying though, I believe that any and all
solutions will require that the byte-code be extracted to some
directory before being run.  It's not as though you are REALLY
compiling the language to native code.  It's just a bootstrap around
the Python interpreter and your code plus any modules that it needs to
run.

--
Jerry



From paddy3118 at netscape.net  Tue Nov 14 16:57:58 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Nov 2006 13:57:58 -0800
Subject: multi split function taking delimiter list
In-Reply-To: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
Message-ID: <1163541478.391883.227320@e3g2000cwe.googlegroups.com>

martinskou at gmail.com wrote:

> Hi, I'm looking for something like:
>
> multi_split( 'a:=b+c' , [':=','+'] )
>
> returning:
> ['a', ':=', 'b', '+', 'c']
>
> whats the python way to achieve this, preferably without regexp?
>
> Thanks.
>
> Martin

I resisted my urge to use a regexp and came up with this:

>>> from itertools import groupby
>>> s = 'apple=blue+cart'
>>> [''.join(g) for k,g in groupby(s, lambda x: x in '=+')]
['apple', '=', 'blue', '+', 'cart']
>>>

For me, the regexp solution would have been clearer, but I need to
stretch my itertools skills.

- Paddy.



From steve at holdenweb.com  Mon Nov 13 04:36:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:36:13 -0600
Subject: reduce to be removed?
In-Reply-To: <1163298336.778941.138540@m73g2000cwd.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<mailman.2116.1163286891.11739.python-list@python.org>	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>	<mailman.2118.1163289463.11739.python-list@python.org>	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>	<mailman.2122.1163291415.11739.python-list@python.org>	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
Message-ID: <ej9e84$8f2$3@sea.gmane.org>

Dustan wrote:
> Fredrik Lundh wrote:
>> Dustan wrote:
[...]
>> Repeat after me:
>>
>> "Not everything has to be a one-liner."
> 
> Not everything has to be a one-liner. But readability helps.
> 
Indeed. And there is absolutely no conflict between those two statements.

Guido resisted introducing tertiary expressions for as long as he did 
precisely because he realised that some people would use them to produce 
unreadable one-liners instead of readable multi-line expressions of the 
same idea.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From billpaterson2006 at googlemail.com  Tue Nov 14 07:10:26 2006
From: billpaterson2006 at googlemail.com (billpaterson2006 at googlemail.com)
Date: 14 Nov 2006 04:10:26 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <1163505308.880218.310810@b28g2000cwb.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<1163504683.480050.242050@h54g2000cwb.googlegroups.com>
	<1163505308.880218.310810@b28g2000cwb.googlegroups.com>
Message-ID: <1163506226.041478.178830@m7g2000cwm.googlegroups.com>

Thanks Fredrik, Peter and John for your help.

John, I especially enjoyed your line by line assasination of my code,
keep it up.

I'm not a programmer, I dislike programming, I'm bad at it. I just
agreed to do this to help someone out, I didn't even know what python
was 3 days ago.

In case you were wondering about all the crazyness with the -------'s -
it's because I am trying to batch convert 1600 files into new versions
with slightly altered syntax.

It all works for now, hurrah, now it's time to break it again.

Cheerio fellas (for now, I'll be back I'm sure ;-D)



From rrr at ronadam.com  Mon Nov 13 14:22:13 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 13 Nov 2006 13:22:13 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558BEC3.3020003@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>
	<4558BEC3.3020003@hobbshouse.org>
Message-ID: <ejags8$l2u$1@sea.gmane.org>

Michael Hobbs wrote:
> Ron Adam wrote:
>> LOL,  of course it would.  I would expect that too after a suitable amount of 
>> 'brain washing', oops, I mean training and conditioning. ;-)
>>   
> Trust me, my brain is quite filthy and doesn't wash easily. I do 
> appreciate aesthetics, which is why still stay with Python, even after 
> programming in Ruby for several months. I've used Java/C/C++ for years, 
> yet I make no complaint about the lack of static typing in Python. Even 
> so, I'd like to think that I know a good thing when I see it.

I find if I approach things on a learning basis and always presume there are 
things I still don't know.  I then tend to get much more help and support than 
if I approach things on a 'I'm right/your wrong' basis.  Also, if I do turn out 
to have a point a view that is not exactly right, it is then much easier for me 
to take a new position or even the reverse position and move on.

> Not to repeat myself from an earlier post, but any pretense that 
> Python's primary objective is readability went out the window with the 
> invention of such constructs as "__del__", "__repr__", and 
> "super(MyClass, self).__init__()". There are obviously other goals to 
> the language's development that inspired these constructs and override 
> the priority of readability.

No one said (that I know of) that readability is *the primary objective*.  But 
it is a very important guideline.

>> Here's an alternative test.  Write a program to remove all the end of line 
>> colons from pythons library and then write another separate program to put them 
>> back in.  Will it miss any?  will it pass the python test suite?
>>   
> I just may take you up on that. ;-) Not for a few days, though. Not 
> enough time right now.
> 
> - Mike

I believe you will find that exercise much more difficult than it seems, but I 
may be wrong.  Good luck if you try it, and let me know how it goes.

Ron









From icetortoise at gmail.com  Sat Nov 25 10:43:27 2006
From: icetortoise at gmail.com (Andy Wu)
Date: 25 Nov 2006 07:43:27 -0800
Subject: Dynamic function execution
Message-ID: <1164469406.980376.194150@h54g2000cwb.googlegroups.com>

Hi guys,

There's a function I want to use which looks like this:

def func(seconds = None, minutes = None, hours = None):
    ...

In my program I can get a string object('seconds', 'minutes', 'hours')
to specify which parameter to use, the problem is I don't know how to
call the function.

Say I have a string 'minutes' and a integer 30, now I need to call the
func this way: func(minutes = 30), how do I do this?

I'm sure this is a simple question, but I can't google it out since I
don't know how to describe it in a short term.

Thanks,

Andy Wu



From rtw at freenet.co.uk  Sat Nov 25 12:31:09 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sat, 25 Nov 2006 11:31:09 -0600
Subject: How to Restart a thread
References: <1164467660.760671.145440@j44g2000cwa.googlegroups.com>
Message-ID: <Xns9886B2695CE2DrtwfreenetREMOVEcouk@216.196.109.145>

many_years_after wrote in news:1164467660.760671.145440
@j44g2000cwa.googlegroups.com in comp.lang.python:

> class mythread(threading.Thread):
>     def __init__(self, threadname):
>         threading.Thread.__init__(self, name = threadname)
> 
>     def run(self):
>         print 'i am running'
>         print 'i quit run()'
> 
> thread  = mythread('1')
> thread.start()
> print threading.activeCount()  ## 1 , this means the thread is active
> if not thread.isAlive():
>     print 'i am dead,you can restart'   ### OK, this is executed. this
> means the thread is no alive
>     thread.start() #### " thread already started "
> 
> This program presentes that the thread quit the *run()* func and is
> active but not alive.   How to understand this? It is said if the
> thread quit the *run()* func , it's dead.
> how to restart it ?
> 
> Thanks
> 

Form the manual [1] (you must have missed this):

    	start( ) 

    	Start the thread's activity. 
    	This must be called at most once per thread object. 
    	It arranges for the object's run() method to be invoked 
    	in a separate thread of control. 

Note the 2nd line:

    	This must be called at most once per thread object. 

so you simply can't restart a Thread object.

[1] http://docs.python.org/lib/thread-objects.html

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From bearophileHUGS at lycos.com  Tue Nov 21 14:46:46 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Nov 2006 11:46:46 -0800
Subject: How to sort list
In-Reply-To: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
Message-ID: <1164138405.757473.237690@m73g2000cwd.googlegroups.com>

> Emails=['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com',....]
> after sorting I would like to have
> Emails=['a at hotmail.com','b at hotmail.com','a at yahoo.com','c at yahoo.com',....]

This problem isn't easy to solve in the general way, this is a first
try:

emails = ['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com']

print sorted(emails, key=lambda em: em.split("@")[::-1])

Bye,
bearophile



From sjmachin at lexicon.net  Sat Nov 18 04:27:11 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 01:27:11 -0800
Subject: How can I speed this function up?
In-Reply-To: <mailman.407.1163838989.32031.python-list@python.org>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<mailman.403.1163827435.32031.python-list@python.org>
	<1163837399.869267.20010@m73g2000cwd.googlegroups.com>
	<mailman.407.1163838989.32031.python-list@python.org>
Message-ID: <1163842031.559701.82140@b28g2000cwb.googlegroups.com>


Gabriel Genellina wrote:
> At Saturday 18/11/2006 05:09, John Machin wrote:
>
> > > If you can assume that all items have 6 numbers, it appears best to
> > > unroll the inner iteration.
> >
> >Is this meant to be some kind of joke?
> >If so, you should have festooned it with smilies.
> >If not, please proceed straight to http://www.thedailyWTF.com and
> >nominate yourself.
>
> ...?
>

We already have a case where the best response to the OP was like
Paddy's response, *not* to answer the question literally.

Then: "loop unrolling"? "assume" with no comments and no assertions?



From cgseymour at gmail.com  Wed Nov  1 14:08:21 2006
From: cgseymour at gmail.com (Chris Seymour)
Date: 1 Nov 2006 11:08:21 -0800
Subject: MySQLdb windows binaries for Python 2.5??
Message-ID: <1162408100.985370.148650@m7g2000cwm.googlegroups.com>

HI All,
Does such a beast exist?  Have been looking but haven't seen any.  Any
insight would be appreciated.

Thanks.

Chris



From aahz at pythoncraft.com  Fri Nov 24 14:04:53 2006
From: aahz at pythoncraft.com (Aahz)
Date: 24 Nov 2006 11:04:53 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<mailman.564.1164158130.32031.python-list@python.org>
	<ek4e6j$hfn$1@panix3.panix.com>
	<4565f8f7$0$8460$426a74cc@news.free.fr>
Message-ID: <ek7fol$444$1@panix3.panix.com>

In article <4565f8f7$0$8460$426a74cc at news.free.fr>,
Bruno Desthuilliers  <bdesth.quelquechose at free.quelquepart.fr> wrote:
>Aahz a ?crit :
>> In article <mailman.564.1164158130.32031.python-list at python.org>,
>> Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
>>> 
>>>Typically, classes are created as a subclass of another class. The
>>>top-level basic type in Python is 'object', so if your class doesn't
>>>make sense deriving from anything else, derive from 'object'.
>>>
>>>   class Point(object):
>>>       pass
>>>
>>>Defining a class with *no* superclass is not recommended. If you don't
>>>yet understand the difference between the above style (called a
>>>"new-style" class) and the style you presented, you should always
>>>derive from a superclass ('object' or something more specific) until
>>>you encounter a situation where that causes a problem.
>> 
>> Side note: I disagree with the above advice, but it's Thanksgiving and I
>> don't have enough room on the margin for the proof.  I think classic
>> classes are just fine.
>
>Don't see it as a religious point please, but I fail to understand why 
>you seem so in love with old-style classes ? new-style classes are the 
>"official" Python object model since 2.2 (which is a few years ago now), 
>and the last mandatory use of them (exceptions...) disappeared with the 
>2.5. AFAIK, everything you do with old-style classes can be done with 
>new-style ones. FWIW, old-style classes support is now only for backward 
>compat. So *why* insisting on using them ?

There's a big difference between saying "always use old-style classes"
and "classic classes are just fine".  So I'm certainly not "in love with"
or "insisting" on using classic classes.  Mostly what I'm saying is that
I think it's kinda gross and grotesque for newcomers to be told to use

    class Point(object):
        pass

instead of

    class Point:
        pass

You are also wrong about new-style classes being the "official" object
model -- the tutorial doesn't even mention them yet!  I also think that
new-style classes should be avoided in Python 2.2 because of the subtle
differences that were introduced in 2.3 -- and 2.2 is still in active
use.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From IloChab at yahoo.it  Sun Nov  5 11:09:45 2006
From: IloChab at yahoo.it (IloChab)
Date: Sun, 05 Nov 2006 17:09:45 +0100
Subject: Really strange behavior
References: <pan.2006.11.04.12.02.26.532144@yahoo.it>
	<pan.2006.11.04.17.19.35.212022@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2006.11.05.16.09.44.632520@yahoo.it>

Il Sun, 05 Nov 2006 04:19:36 +1100, Steven D'Aprano ha scritto:

> Why don't you add some temporary print statements into your code to try
> to narrow it down?
> 
> 
I did it and I followed the script with the dubugger and what I saw is
that it gets lost in the simulate method of QTReactor instead if executing
QTapplication.
So I thought about some wrong rebinding of 'app' in the multiple functions
call.
I was guessing about some python error that I could not see.

But the fact that neither you can't see anything wrong, let me guess about
some problem with the reactor.

Thank for your time.
Licia


From fredrik at pythonware.com  Mon Nov 13 15:30:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 21:30:35 +0100
Subject: Python memory usage
In-Reply-To: <20061113211301.7894fc78@localhost.localdomain>
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>	<mailman.87.1163447251.32031.python-list@python.org>
	<20061113211301.7894fc78@localhost.localdomain>
Message-ID: <ejaklb$428$1@sea.gmane.org>

Jonathan Ballet wrote:

>> http://effbot.org/pyfaq/why-doesnt-python-release-the-memory-when-i-delete-a-large-object
> 
> Is it still true with Python 2.5 ?
> 
> I mean, [http://evanjones.ca/python-memory.html] should fix this
> behaviour, doesn't it ?

not really -- that change just means that Python's object allocator will 
return memory chunks to the C allocator if the chunks become empty, but 
as the FAQ entry says, there are no guarantees that anything will be 
returned at all.  it all depends on your application's memory allocation 
patterns.

(did you read Evan's presentation material, btw?)

</F>



From dananrg at yahoo.com  Thu Nov  9 11:20:29 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 9 Nov 2006 08:20:29 -0800
Subject: More elegant way to obtain ACLs / permissions for windows
	directories than using "cacls" dos command?
In-Reply-To: <1162993589_43917@sp6iad.superfeed.net>
References: <1162933222.244854.135180@f16g2000cwb.googlegroups.com>
	<1162952479_41619@sp6iad.superfeed.net>
	<1162988020.060319.124030@b28g2000cwb.googlegroups.com>
	<1162988715.639810.125270@f16g2000cwb.googlegroups.com>
	<1162993589_43917@sp6iad.superfeed.net>
Message-ID: <1163089228.962451.11620@k70g2000cwa.googlegroups.com>

> There are some examples of using the security descriptor objects in
> \Lib\site-packages\win32\Demos\security.
> Also, searching the Python-win32 mailing list should turn up some
> more code.

Thanks again Roger.



From steve at holdenweb.com  Mon Nov 13 06:26:57 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 05:26:57 -0600
Subject: reduce to be removed?
In-Reply-To: <ej9fv3$i3l$2@sea.gmane.org>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>	<1163314554.972785.175860@h48g2000cwc.googlegroups.com>	<ej9ekk$e23$1@sea.gmane.org>
	<ej9fv3$i3l$2@sea.gmane.org>
Message-ID: <ej9kno$2fb$1@sea.gmane.org>

Fredrik Lundh wrote:
> Steve Holden wrote:
[...]
>> I suppose it's only a matter of time before someone wants to define 
>> dict.__add__ ...
> 
> that's been proposed quite a few times, and always gets stuck when it's 
> time to define the exact semantics for dealing with collisions.  there 
> are simply too many ways to do it, and all of them are can be trivially 
> and efficiently implemented in terms of copy/update or for-in (or, in 
> quite a few cases, by using sets instead of dicts).
> 
But, as we both know, the fact that something can be trivially 
implemented in Python doesn't stop people asking for it to be added as 
native.

oh-no-indeed-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From tanto.sugiarto at gmail.com  Mon Nov 27 14:13:23 2006
From: tanto.sugiarto at gmail.com (tsjuan)
Date: 27 Nov 2006 11:13:23 -0800
Subject: Passing com object from simple xmlrpc server to client
Message-ID: <1164654803.832525.251850@n67g2000cwd.googlegroups.com>

Hello python users,

I am just learning on how to use xmlrpc and stumbled upon how to pass
com object
from server to client side.

The client side complain about can't marshall the com object. I don't
know what type
of marshall command I should use to pass the object.

Below are my scripts, any help / comments are greatly appreciated:

# Server Side script
# ===============

import win32com.client
import SimpleXMLRPCServer
import pythoncom

class ServerFunctions(object):

   def call_com_object(self):
       pythoncom.CoInitialize()
       return win32com.client.Dispatch('excel.application')

if __name__ == '__main__'
    server =
SimpleXMLRPCServer.SimpleXMLROCServer(('hostname',portnumber))
    server.register_instance(ServerFunctions())


# Client Side Script
# ==============

import xmlrpclib
client = xmlrpclib.Server('http://hostname:portname")
excel_object = client.call_com_object()



Regards,
Tanto Sugiarto



From B.Ogryczak at gmail.com  Wed Nov 29 12:35:17 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 29 Nov 2006 09:35:17 -0800
Subject: How to refer to Python?
In-Reply-To: <mailman.814.1164750520.32031.python-list@python.org>
References: <mailman.814.1164750520.32031.python-list@python.org>
Message-ID: <1164821717.453990.312450@j44g2000cwa.googlegroups.com>


Sebastian Bassi wrote:
> I am writing a paper where I refer to Python. Is there a paper that I
> can refer the reader to? Or just use the Python web page as a
> reference?

I?d refer to "The Python Language Reference Manual", Guido Van Rossum,
Fred L., Jr. Drake
Network Theory Ltd (September 2003), ISBN: 0954161785



From cfriedl at bigpond.net.au  Fri Nov 17 21:40:16 2006
From: cfriedl at bigpond.net.au (Chris)
Date: Sat, 18 Nov 2006 02:40:16 GMT
Subject: How can I speed this function up?
Message-ID: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>

This is just some dummy code to mimic what's being done in the real 
code. The actual code is python which is used as a scripting language in 
a third party app. The data structure returned by the app is more or 
less like the "data" list in the code below. The test for "ELEMENT" is 
necessary ... it just evaluates to true every time in this test code. In 
the real app perhaps 90% of tests will also be true.

So my question is how can I speed up what's happening inside the 
function write_data()? Only allowed to use vanilla python (no psycho or 
other libraries outside of a vanilla python install).

I have a vested interest in showing a colleague that a python app can 
yield results in a time comparable to his C-app, which he feels is mch 
faster. I'd like to know what I can do within the constraints of the 
python language to get the best speed possible. Hope someone can help.

def write_data1(out, data):
     for i in data:
         if i[0] is 'ELEMENT':
             out.write("%s %06d " % (i[0], i[1]))
             for j in i[2]:
                 out.write("%d " % (j))
             out.write("\n")

import timeit

# basic data mimicing data returned from 3rd party app
data = []
for i in range(500000):
     data.append(("ELEMENT", i, (1,2,3,4,5,6)))

# write data out to file
fname = "test2.txt"
out = open(fname,'w')
start= timeit.time.clock()
write_data2(out, data)
out.close()
print timeit.time.clock()-start




From rtw at freenet.co.uk  Mon Nov 20 11:08:00 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Mon, 20 Nov 2006 10:08:00 -0600
Subject: Misleading IOerror when opening a non-existent file for append?
References: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
	<1164037676.537263.53480@f16g2000cwb.googlegroups.com>
Message-ID: <Xns9881A3E1817EArtwfreenetREMOVEcouk@216.196.109.145>

paul.keating at nibc.com  wrote in news:1164037676.537263.53480
@f16g2000cwb.googlegroups.com in comp.lang.python:

> It probably is misleading. But I'd say it's a misleading Linux message
> not a misleading Python message.
> f = file(r'c:\temp\DoesNotExist.txt','a')
> not only does not give a misleading error under Windows, it works.

AFAICT that wasn't quite what the OP was trying to do, more like:

>>> f = file(r'c:\does-not-exist\DoesNotExist.txt','a')

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    f = file(r'c:\does-not-exist\DoesNotExist.txt','a')
IOError: [Errno 2] No such file or directory: 'c:\\does-not-exist
\\DoesNotExist.txt'
>>> 

So at least the error messsage is better.

But I'm confused by the use of '\\' by the OP on *nix this should
be just a character in the filename so in /home/username

file=open("\\no_such_dir\\no_such_file" ,'a')

whould be attempting to append to the (presumably) non-existant
file /home/username/\\no_such_dir\\no_such_file

Perhaps the append mode ('a') doens't create a file on the OP's
linux box, and thus using 'a' for a file name that doesn't exist 
is an "invalid mode".

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From userprogoogle-139 at yahoo.co.uk  Mon Nov 13 10:16:37 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 13 Nov 2006 07:16:37 -0800
Subject: CORBA: Fnorb Problems
Message-ID: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>

Hi,

I have installed Fnorb and everything seems to have gone ok. However I
keep getting the error message below. This is despite the fact that the
MS CL c++ preprocessor seems to be in PATH. I can type "cl" and
although I get nothing back in the DOS window, there is also no error
message.

Traceback (most recent call last):
  File "C:\Python24\Lib\site-packages\Fnorb\script\cpp.py", line 53, in
-toplevel-
    raise "No C/C++ pre-processor found in your PATH!"
No C/C++ pre-processor found in your PATH!

On seeing what information is returned the variables which are
searching for the presence of CL in PATH come back with nothing.

System: Windows XP, Python 2.4, Most recent version of Fnorb 1.3.

Any pointers are welcome. Thanks in advance.


Best,

rod



From pgurumur at gmail.com  Thu Nov  9 01:29:57 2006
From: pgurumur at gmail.com (Prabhu Gurumurthy)
Date: Wed, 08 Nov 2006 22:29:57 -0800
Subject: Question regarding lists and regex
Message-ID: <4552CAE5.7020906@gmail.com>

Here is a simple program, which queries /var/log/daemon on my OpenBSD box and 
gets the list of valid ntp peers.

Questions:
what is the easiest way for me to create lists on the fly, by that I mean like perl

push my @foo, something_from_say_stderr. The reason is as you can ip = [""] 
statement before the for loop, I want to avoid that and use list within the 
second ip loop, where I extract the ip address. Am I confusing?

regex: I presume this is rather a dumb question, anyways here it comes! as you 
can see from my program, pattIp = r\d{1,3}\.... etc, is there any other easy way 
to group the reptitions, instead of typing the same regex 4 times.

TIA
Prabhu
-

amazon: [~/working/programs/python/regex]
ttyp4: [109]$ cat syslog.py
#!/usr/bin/env python
# $Id: syslog.py,v 1.6 2006/11/09 06:24:03 pgurumur Exp $

import getopt, re, os, string, sys, time
(dirname, program) = os.path.split(sys.argv[0])
argc = len(sys.argv)

def usage():
    print program + ": options"
    print "options: "
    print "          --filename | -f [ name of the file ]"
    print "          --help | -h [ prints this help ]"
    sys.exit(1)

if __name__ == "__main__":
    if (argc <= 1):
       usage()
    else:
       try:
          opts, args = getopt.getopt(sys.argv[1:], "f:h", ["help", "filename="])
       except getopt.GetoptError:
          usage()
       else:
          filename = ""
          for optind, optarg in opts:
             if optind in ("-f", "--filename"):
                filename = optarg
             elif optind in ("-h", "--help"):
                usage()

          if len(filename):
             fh = 0
             try:
                fh = open(filename, "r")
             except IOError, (error, message):
                print program + ": cannot open " + filename + ": " + message
                sys.exit(1)

             pattNtp = r'.*ntpd(?=.*now\s+valid)'
             count = 0
             ip = [""]
             pid = 0
             for line in fh.readlines():
                if re.match(pattNtp, line.strip(), re.IGNORECASE):
                   string = line.strip()
                   pattPid = r'\[\d{1,5}\]'
                   pidMatch = re.search(pattPid, string, re.IGNORECASE)
                   if pidMatch is not None:
                      pid = int(re.sub(r'\[|\]', "", pidMatch.group()))

                   pattIp = r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'
                   match = re.search(pattIp, string, re.IGNORECASE)
                   if match is not None:
                      ip.append(match.group())
                      count += 1

             print "NTP program started with pid:", pid
             print "Number of valid peers:", count
             for x in ip:
                if len(x):
                   print x

             fh.close()


From gregpinero at gmail.com  Fri Nov 17 11:56:57 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Fri, 17 Nov 2006 11:56:57 -0500
Subject: Heap Memory
In-Reply-To: <lYd7h.7606$l25.6583@newsread4.news.pas.earthlink.net>
References: <5a00f6240611160520r1056e76er84acf2ac751507d0@mail.gmail.com>
	<312cfe2b0611160915j2e0597f1x71eaa70676593863@mail.gmail.com>
	<ejia35$cfk$1@sea.gmane.org>
	<312cfe2b0611161108h21e86e1bx5917e581f56e35cd@mail.gmail.com>
	<455D3354.7000002@branda.to>
	<mailman.306.1163740659.32031.python-list@python.org>
	<lYd7h.7606$l25.6583@newsread4.news.pas.earthlink.net>
Message-ID: <312cfe2b0611170856l5df92d1dm64621a397aa0e53@mail.gmail.com>

On 11/17/06, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>         The default configuration for WinXP is 2GB shared OS, and 2GB
> process... I believe there is some registry setting that can change that
> to 1GB/3GB.

I did some research and it looks like it does apply to XP
(http://support.microsoft.com/kb/833721#)

However it does say:
A program must be designed to take advantage of the additional memory
address space.

I don't know what that means.  However this blog comment
(http://blogs.msdn.com/oldnewthing/archive/2004/08/05/208908.aspx#209332)
suggests:
Just flipping /3GB isn't enough for most programs. It has the effect
on the kernel, true, but unless your process's executable has the
Large Address Space Aware flag set, Windows won't actually give you
the full 3GB space. Link your executable with /LARGEADDRESSAWARE or
use EDITBIN. ...

Is this something that has to be done when building Python, was it
already done by default,  or can my Python script affect this somehow?
 I'd like to use the /3GB switch if possible.

Finally a side question:
How does Python use memory on a 64 bit OS?  Is there a lot more
available to it by default?

-Greg


From pavlovevidence at gmail.com  Sat Nov 25 10:19:04 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 25 Nov 2006 07:19:04 -0800
Subject: The Python Papers Edition One
In-Reply-To: <7xbqmvn9um.fsf@ruckus.brouhaha.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
	<7xbqmvn9um.fsf@ruckus.brouhaha.com>
Message-ID: <1164467944.050102.21460@j72g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
> > Your email indicates a possible concern that we are doing something
> > untoward -- this was not at all intended, nor is it true.
>
> Although you might not have intended it, I feel it is still true.  You
> are misappropriating terminology ("free as in freedom") from the free
> software movement that means a work is licensed in a way that meets
> some specific criteria, that the license you're using does not meet.

"Free as in freedom" is not terminology; it's a way to differentiate
one of two different senses of the word "free".  "Specific criteria" is
some people's idea of what freedom is, but they're not the last word on
it.


Carl Banks



From Eric_Dexter at msn.com  Wed Nov  8 05:17:35 2006
From: Eric_Dexter at msn.com (Eric_Dexter at msn.com)
Date: 8 Nov 2006 02:17:35 -0800
Subject: E-Commerce Partner Program
In-Reply-To: <1162976937.184245.98750@h48g2000cwc.googlegroups.com>
References: <1162976937.184245.98750@h48g2000cwc.googlegroups.com>
Message-ID: <1162981055.498141.15940@h48g2000cwc.googlegroups.com>


jlicht at gmail.com wrote:
> Just thought that I'd let you know that PricePlay.com has launched an
> awesome Partner Program for all the E-Commerce developers.  All you
> have to do is sign someone up and get paid.
>
> http://www.priceplay.com/corporate/partners/incentive/signup.cfm

To extend and revise my notes that I need it to be callible from inside
a program with two arguments in exchange for addspace or links or
whatever that isn't actual cash.  Offer good to anyone who isn't
running obsene adds.

http://www.dexrow.com



From sturlamolden at yahoo.no  Sun Nov 12 18:41:39 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 12 Nov 2006 15:41:39 -0800
Subject: numpy/scipy: correlation
In-Reply-To: <1163373385.596233.102100@k70g2000cwa.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
Message-ID: <1163374899.442203.257520@e3g2000cwe.googlegroups.com>


While I am at it, lets add the bootstrap estimate of the standard error
as well.




from numpy import mean, std, sum, sqrt, sort, corrcoef, tanh, arctanh
from numpy.random import randint

def bootstrap_correlation(x,y):
   idx = randint(len(x),size=(1000,len(x)))
   bx = x[idx]
   by = y[idx]
   mx = mean(bx,1)
   my = mean(by,1)
   sx = std(bx,1)
   sy = std(by,1)
   r = sort(sum( (bx - mx.repeat(len(x),0).reshape(bx.shape)) *
       (by - my.repeat(len(y),0).reshape(by.shape)), 1)
        / ((len(x)-1)*sx*sy))
   #bootstrap confidence interval (NB! biased)
   conf_interval = (r[25],r[975])
   #bootstrap standard error using Fisher's z-transform  (NB! biased)
   std_err = tanh(std(arctanh(r))*(len(r)/(len(r)-1.0)))
   return (std_err, conf_interval)

Since we are not using bias corrected and accelerated bootstrap, the
standard error are more meaningful, although both estimates are biased.

I said that the boostrap is "distribution free". That is not quite the
case either. The assumed distribution is the provided sample
distribution, i.e. a sum of Dirac delta functions. Often this is not a
very sound assumption, and the bootstrap must then be improved e.g.
using the BCA procedure. That is particularly important for confidence
intervals, but not so much for standard errors. However for a
quick-and-dirty standard error estimate, we can just ignore the small
bias.

Now, if you wonder why I used the standard deviation to obtain the
standard error (without dividing by sqrt(n) ), the answer is that the
standard error is the standard deviation of an estimator. As we have
1000 samples from the correlation's sampling distribution in r, we get
the "standard error of the correlation" by taking the standard
deviation of r. The z-transform is required before we can compute mean
and standard deviations of correlations.



From stugots at qwest.net  Tue Nov 28 12:22:47 2006
From: stugots at qwest.net (John DeRosa)
Date: Tue, 28 Nov 2006 09:22:47 -0800
Subject: SPE (Stani's Python Editor) web site?
Message-ID: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>

SPE's site (http://pythonide.stani.be/) has been inaccessible to me
for at least a day.  Can anyone else get to it?

I looked on Google and didn't see any new locations for SPE.  Has it
recently moved to somewhere else?  I dimly recall a post by Stani
wherein he said he might move the site, but I can't find it...

John


From kent at kentsjohnson.com  Thu Nov 30 11:28:48 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 30 Nov 2006 16:28:48 GMT
Subject: a quickie: range - x
In-Reply-To: <pan.2006.11.30.04.17.10.9008@REMOVE.THIS.cybersource.com.au>
References: <1164858136.495250.180790@14g2000cws.googlegroups.com>
	<pan.2006.11.30.04.17.10.9008@REMOVE.THIS.cybersource.com.au>
Message-ID: <4FDbh.1342$eb5.391@newsreading01.news.tds.net>

Steven D'Aprano wrote:
> On Wed, 29 Nov 2006 19:42:16 -0800, rjtucke wrote:
> 
>> I want an iterable from 0 to N except for element m (<=M).


> x = range(m-1) + range(m+1, N)

Should be range(m) + range(m+1, N)

Kent


From Iacopo.Marmo at gmail.com  Tue Nov 14 17:05:50 2006
From: Iacopo.Marmo at gmail.com (Iacopo.Marmo at gmail.com)
Date: 14 Nov 2006 14:05:50 -0800
Subject: how to create a multicolor "font-string" in pygame??
In-Reply-To: <4rhs32Frkr4qU1@mid.uni-berlin.de>
References: <1163106732.026203.111360@m73g2000cwd.googlegroups.com>
	<4rhptpFrneqhU1@mid.uni-berlin.de>
	<4rhs32Frkr4qU1@mid.uni-berlin.de>
Message-ID: <1163541950.177857.224900@h54g2000cwb.googlegroups.com>

> Of course you can just create an equally dimensioned image for each
> character and each color (cached or not, however you like it), and just
> blit these one after another, offsetting them with the character width.
> 
> Diez

thanks.



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 21:42:18 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 13:42:18 +1100
Subject: explicit self revisited
References: <ej5fuv$a4a$1@online.de>
Message-ID: <pan.2006.11.12.02.42.17.839194@REMOVE.THIS.cybersource.com.au>

On Sat, 11 Nov 2006 22:39:37 +0100, Peter Maas wrote:

[snip]
> let self be represented by the dot, e.g. replace
> 
> class someTest(unittest.TestCase):
>     def setUp(self):
>         self.ly = yList()
>         self.m1 = self.ly[0].message
>         self.m2 = self.ly[1].message
>         self.m3 = self.ly[2].message
 
> by
> 
> class x(unittest.TestCase):
>     def .setUp():
>         .ly = yList()
>         .m1 = .ly[0].message
>         .m2 = .ly[1].message
>         .m3 = .ly[2].message

On the assumption that Peter was sincere, and not trolling, I thought I'd
make a point-by-point response, but then X crashed and took my post with
it. So here's the brief version.

Implicit self will never be used for Python, because it is redundant so
long as there is a need for explicit self, and there is a need for
explicit self because there are a number of basic, dare I say
*fundamental* programming techniques that require an explicit self.

For example, delegation.

class MyClass(Parent):
    def method(self, arg):
        Parent.method(self, arg)
        # what are you going to write? Parent.method(,arg) maybe?

Here's another fundamental technique that implicit self breaks.

class MyList(list):
    def __iadd__(self, other):
        # in-place addition
        other = transform(other) # do something to the argument
        super(MyList, self).__iadd__(other) # call the superclass
        # could be written .__class__.__iadd__(other)
        # BUT be aware the semantics are NOT the same!
        return self  # and return the suitably modified instance

You can't explicitly return the instance unless you have an explicit name
for it. (And if you are thinking of creating more magic syntax that
implicitly returns self, just don't bother.)

Even more fundamentally, any time you need to pass the instance to a
function, you need an explicit self. (Delegation is a special case of this.)

    def __str__(self):
        # I like semicolons and dislike square brackets.
        return ';'.join(self)



-- 
Steven.



From fredrik at pythonware.com  Thu Nov  2 08:27:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 02 Nov 2006 14:27:41 +0100
Subject: best way to check if a file exists?
In-Reply-To: <pan.2006.11.02.13.10.54.293471@REMOVE.THIS.cybersource.com.au>
References: <EQO1h.213$1n3.4609@news.tufts.edu>	<1162383348.925961.231160@h48g2000cwc.googlegroups.com>	<mailman.1597.1162389697.11739.python-list@python.org>	<1162390455.727684.118970@b28g2000cwb.googlegroups.com>	<mailman.1606.1162392331.11739.python-list@python.org>
	<pan.2006.11.02.13.10.54.293471@REMOVE.THIS.cybersource.com.au>
Message-ID: <eicrob$hlc$1@sea.gmane.org>

Steven D'Aprano wrote:

> But there can be a race condition between os.path.exists returning True
> and you trying to open the file, if some other process deletes or renames
> the file in the meantime.

if you'd used a threaded newsreader, you would have seen the code that 
"as follows" was referring to, and you would probably also have noticed 
that people have been pointing out the potential race problems several 
times already.

</F>



From skip.montanaro at gmail.com  Sun Nov 19 12:58:16 2006
From: skip.montanaro at gmail.com (Skip Montanaro)
Date: Sun, 19 Nov 2006 11:58:16 -0600
Subject: decompiler
In-Reply-To: <4sb0kmFurjq2U3@mid.individual.net>
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
	<Xns987F45C03807castleamber@130.133.1.4>
	<1163893594.341657.248720@k70g2000cwa.googlegroups.com>
	<4sb0kmFurjq2U3@mid.individual.net>
Message-ID: <60bb7ceb0611190958s2647840fqe21964092411cb8c@mail.gmail.com>

> You have to know your enemy ;)

We have met the enemy and they are us.
http://www.igopogo.com/we_have_met.htm  ;-)

Skip


From fredrik at pythonware.com  Sun Nov 19 01:58:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 07:58:33 +0100
Subject: MAKE GOOD MONEY BY INTERNET
In-Reply-To: <Xns987F9C3065916castleamber@130.133.1.4>
References: <1163848933.731124.307470@e3g2000cwe.googlegroups.com>	<e%C7h.74$_H5.64@tornado.texas.rr.com>
	<Xns987F9C3065916castleamber@130.133.1.4>
Message-ID: <ejovaq$h6$1@sea.gmane.org>

John Bokma wrote:

> dumbfuck

Is there no way to filter this kind of junk, short of going to a 
moderated list?

</F>



From joshbloom at gmail.com  Mon Nov 20 16:01:23 2006
From: joshbloom at gmail.com (Josh Bloom)
Date: Mon, 20 Nov 2006 14:01:23 -0700
Subject: Help!!! New to Python and getting an error I can't figure out
In-Reply-To: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <d25b6e9a0611201301w2be007c9nba8f7bec91f001ba@mail.gmail.com>

As a first guess what kind of editor are you using to create the .py files?
Maybe MS Word or something that is using smart quotes?

Make sure to use a text editor that doesn't do things like that. Try notepad
and see if that works for you.

-Josh



On 11/20/06, Tom Mountney <mountney at hotmail.com> wrote:
>
> Any help is greatly appreciated!!!
>
> I'm learning python and from a book I tried this program: (all the
> indentation is there just doen't appear in this EMail)
> ----------------------------------------------------------
>
> #file grep.py
> import os
> from os import isfile
>
> class dirGrep:
> def __init__(self, directory):
>   self.files = filter(isfile,
>    [os.path.join(directory, x) for x in os.listdir(directory)])
>
> def findLines(self, pattern, filelist=none):
>   """Accepts pattern, returns lines that contain pattern.
>   Optional 2nd argument is a filelist to search"""
>   if not filelist:
>    filelist = self.files
>   results = []
>   for file in filelist:
>    fo = open(file)
>    results += [x for x in fo.readlines()
>     if x.find(pattern) != -1]
>    fo.close() #explicit close of the file object
>   return results
>
> def findfiles(self, pattern):
>   "Accepts pattern, returns filenames that contain pattern"
>   return[x for x in self.files if x.find(pattern) != -1
>
> #test
> if __name__ == "__main__":
> (g = dirGrep("c:\\winnt"))
> files = g.findFiles(".py")
> print g.findLines("java", files)
>
> When I try to run the program - python grep.py - I get the following
> error:
>
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax
>
> What am I doing wrong?
> Thanks for any help
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From darran at edmstudio.com  Mon Nov 20 13:56:58 2006
From: darran at edmstudio.com (darran)
Date: 20 Nov 2006 10:56:58 -0800
Subject: Finding skilled pythonistas for micro-jobs?
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
	<1163936364.875248.14590@h54g2000cwb.googlegroups.com>
Message-ID: <1164049018.589991.52830@h48g2000cwc.googlegroups.com>

John Machin wrote:
> Clear goals, unit testing as applied to "data wrangling" -- a nonsense.
> Specs are prepared that are only tangentially relevant to the task and
> have obviously not been derived from any inspection of the data.

No specs.  Context and a full suite unit tests.  Pass the test suite
(without,
of course, trying to circumvent the spirit of the tests) and you're
done.  If
the tests don't span the actual dataset, that's my fault, not yours.

Cheers,
Darran.



From anton.vredegoor at gmail.com  Thu Nov 23 18:19:40 2006
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Fri, 24 Nov 2006 00:19:40 +0100
Subject: proof of concept python and tkinter gnugo interface
Message-ID: <ek5a9j$tcm$1@news3.zwoll1.ov.home.nl>

For the last few days I've been doodling with a script that provides a 
graphical interface to gnugo by using its GTP protocol. At the moment 
the script is *very* basic, in fact the only thing it does is to allow 
one to click on a coordinate and place a move there OR press the space 
bar in order to let gnugo generate a move.

However, I feel that this idea has some potential, it could be made to 
undo or redo moves or load sgf-games. But most importantly: It could 
load the list of move suggestions from gnugo, do some computations 
itself in *Python* on that list and then generate a move.

So I thought that it would be best to present this script while it is 
still small and modifications can be done easily. In the end there's 
possibly a lot of potential and I think I'm going to need some help from 
people that are enthousiastic about Python or gnugo.

What I want to accomplish with this post is to get to know whether it 
would be a good idea to make it  a sourceforge project (it would be even 
better if some more experienced sourceforger would do it for me :-) or 
whether I should just go on doodling on this script by myself, gradually 
adapting it to fit my personal interests and come back to you in a few 
years with a more complete script.

Is there any need for such a beast for *more* people than just me to 
work on?

Here's the proof of concept, just copy it to some dir and run the Python 
script:

http://home.hccnet.nl/a.vredegoor/gnugo/

It needs Python 2.5 which you can get at:

http://www.python.org/

Anton


From jorge.vargas at gmail.com  Mon Nov 13 08:50:37 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Mon, 13 Nov 2006 09:50:37 -0400
Subject: how is python not the same as java?
In-Reply-To: <45584e10$0$32008$426a74cc@news.free.fr>
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<mailman.2035.1163170200.11739.python-list@python.org>
	<45584e10$0$32008$426a74cc@news.free.fr>
Message-ID: <32822fe60611130550v775f927ao1091f64cd1ee8b9c@mail.gmail.com>

ok then they are the same lets all go back to write java....


From lupe at localhost.localdomain  Wed Nov  8 07:53:05 2006
From: lupe at localhost.localdomain (Luis P. Mendes)
Date: Wed, 08 Nov 2006 12:53:05 +0000
Subject: psycopg2 faster way to retrieve last x records
References: <pan.2006.11.08.00.30.45.56149@localhost.localdomain>
	<mailman.1869.1162947807.11739.python-list@python.org>
Message-ID: <pan.2006.11.08.12.52.59.449646@localhost.localdomain>

Em Tue, 07 Nov 2006 17:03:17 -0800, Stuart Bishop escreveu:

> 
> The following SQL statement will return the last 200 rows in reverse order:
> 
> SELECT * FROM seconds ORDER BY tempounix DESC LIMIT 200
> 
> This will only send 200 rows from the server to the client (your existing
> approach will send all of the rows). Also, if you have an index on tempounix
> it will be really fast.
> 
> 
> If you really need the results in tempounix order, then:
> 
> SELECT * FROM (
>     SELECT * FROM seconds ORDER BY tempounix DESC LIMIT 200
>     ) AS whatever
> ORDER BY tempounix;

Thank you Stuart, I'll try it.

Luis P. Mendes


From nicolasg at gmail.com  Wed Nov  8 18:31:27 2006
From: nicolasg at gmail.com (NicolasG)
Date: 8 Nov 2006 15:31:27 -0800
Subject: help using smtplib to work ..
In-Reply-To: <455263B5.9080704@websafe.com>
References: <1163024588.884055.12460@i42g2000cwa.googlegroups.com>
	<455263B5.9080704@websafe.com>
Message-ID: <1163028687.814815.270120@i42g2000cwa.googlegroups.com>


> <snip from Gmail SMTP setup instructions>
>
> Under outgoing mail smtp server, use smtp.gmail.com. Since it requires SMTP
> authorization, use your Gmail account as username (e.g. yourname at gmail.com) and
> your Gmail password as password. You can turn TSL on or off.
>
> <end snip>
>
> The email server requires authentication before it can send.
> Normally this can be accomplished either by calling
>
Actually I used alt1.gmail-smtp-in.l.google.com for a server I don't
need authentication. The problem is that for some mail addresses I can
send mail's while for other's I can't . I don't know how to explained
that.....

> server.login(userid, password)
>
> The only alternative is to use an open relay email server that allows
> you to send without authenticating.  Hope info at least points you in
> the right direction.
>
the code bellow worked fine to me :

import smtplib

fromaddr = 'nicolasg at gmail.com'
toaddrs  = 'nicolasg at gmail.com'
subject = 'someting for subject !'

msg = 'This is body of the mail.'

msg = 'From: ' + fromaddr + '\nTo: ' + toaddrs + '\nSubject: ' +
subject + '\n\n' + msg
print "Message length is " + repr(len(msg))

server = smtplib.SMTP('alt1.gmail-smtp-in.l.google.com')
#'smtp.gmail.com')
server.set_debuglevel(1)
server.sendmail(fromaddr, toaddrs, msg)
server.quit()

cheers.



From bernard.chhun at gmail.com  Mon Nov 13 16:36:31 2006
From: bernard.chhun at gmail.com (Bernard)
Date: 13 Nov 2006 13:36:31 -0800
Subject: HTML Parsing and Indexing
In-Reply-To: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
References: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
Message-ID: <1163453791.558594.201050@h48g2000cwc.googlegroups.com>

a combination of urllib, urlib2 and BeautifulSoup should do it.
Read BeautifulSoup's documentation to know how to browse through the
DOM.

mailtogops at gmail.com a ?crit :

> Hi All,
>
>     I am involved in one project which tends to collect news
> information published on selected, known web sites inthe format of
> HTML, RSS, etc and sortlist them and create a bookmark on our website
> for the news content(we will use django for web development). Currently
> this project is under heavy development.
>
> I need a help on HTML parser.
>
> I can download the web pages from target sites. Then I have to start
> doing parsing. Since they all html web pages, they will have different
> styles, tags, it is very hard for me to parse the data. So what we plan
> is to have one or more rules for each website and run based on rule. We
> can even write some small amount of code for each web site  if
> required. But Crawler, Parser and Indexer need to run unattended. I
> don't know how to proceed next..
>
> I saw a couple of python parsers like pyparsing, yappy, yapps, etc but
> they havn't given any example for HTML parsing. Someone recommended
> using "lynx" to convert the page into the text and parse the data. That
> also looks good but still i end of writing a huge chunk of code for
> each web page.
>
> What we need is,
>
> One nice parser which should work on HTML/text file (lynx output) and
> work based on certain rules and return us a result (Am I need magix to
> do this :-( )
> 
> Sorry about my english..
> 
> Thanks & Regards,
> 
> Krish



From kw at kevin-walzer.com  Sun Nov 19 21:18:14 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Sun, 19 Nov 2006 21:18:14 -0500
Subject: Getting value from Tkinter entry widget: variable scope difficulty
Message-ID: <a5ddc$45611064$4275d90a$31958@FUSE.NET>

I'm trying to construct a simple Tkinter GUI and I'm having trouble with
getting the value of an entry widget and passing it onto a callback
function. But I'm not grokking variable scope correctly.

I have two functions. Here are the relevant excerpts:

def makeGUI():

   ###lots of code to set up toplevel windows

    searchbutton=Button(topframe, image=searchglass, command=doSomething)
    searchbutton.image=searchglass
    searchbutton.pack(side=LEFT,  expand = NO)

    searchterm=StringVar()

    entryterm=Entry(topframe, textvariable=searchterm)
    entryterm.pack(side=RIGHT)

    entrylabel=Label(topframe, text="Search:")
    entrylabel.pack(side=RIGHT)


def doSomething():

	 file = os.popen('systemcommand %s' % searchterm, 'r')

	print searchterm

---

What I want to happen is the value of searchterm to be passed on to the
doSomething() call when the searchbutton is pressed. Right now it
appears the value of "searchterm" is local to each function.

In Tcl this would be handled by simply assigning the variable
"searchterm" to the global namespace in each function, i.e. "global
searchterm." I've looked and can't quite figure out how to do this in
Python. Any advice is appreciated.

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


From deets at nospam.web.de  Wed Nov  8 07:09:31 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 08 Nov 2006 13:09:31 +0100
Subject: for x in... x remains global
References: <dfc90$4551c444$544abc47$21060@news.hispeed.ch>
Message-ID: <4rdvnsFqv1sdU1@mid.uni-berlin.de>

Antoine De Groote wrote:

> for x in range(3): pass
> 
> After this statement is executed x is global variable. This seems very
> unnatural to me and caused me 3 three days of debugging because I was
> unintentionally using x further down in my program (typo). I would have
> thought that variables like this are local to the for block.
> 
> Is there a reason this is not the case? Maybe there are PEPs or
> something else about the matter that you can point me to?

It's an somewhat unfortunate fact that loop variables leak to the outer
scope.  List-comps as well, btw.

In 

http://www.python.org/dev/peps/pep-0289/

it says that this will be remedied in Py3K 

"""
List comprehensions also "leak" their loop variable into the surrounding
scope. This will also change in Python 3.0, so that the semantic definition
of a list comprehension in Python 3.0 will be equivalent to list(<generator
expression>). Python 2.4 and beyond should issue a deprecation warning if a
list comprehension's loop variable has the same name as a variable used in
the immediately surrounding scope.
"""

And while I can't make an authorative statement about this, I can imagine
that it won't be fixed anywhere in python2.X, as code like this is
certainly to be found:

for x in some_xes:
    if condition(x):
        break

print x


Diez


From gabor at nekomancer.net  Fri Nov 17 05:30:28 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 11:30:28 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <pan.2006.11.17.09.08.26.255202@gmx.net>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<pan.2006.11.17.09.08.26.255202@gmx.net>
Message-ID: <4cefe$455d8f47$59ad1aca$3993@news.flashnewsgroups.com>

Marc 'BlackJack' Rintsch wrote:
> In <mailman.294.1163721712.32031.python-list at python.org>, Jean-Paul
> Calderone wrote:
> 
>>> How would you propose listdir should behave?
>> Umm, just a wild guess, but how about raising an exception which includes
>> the name of the file which could not be decoded?
> 
> Suppose you have a directory with just some files having a name that can't
> be decoded with the file system encoding.  So `listdir()` fails at this
> point and raises an exception.  How would you get the names then? Even the
> ones that *can* be decoded?  This doesn't look very nice:
> 
> path = u'some path'
> try:
>     files = os.listdir(path)
> except UnicodeError, e:
>     files = os.listdir(path.encode(sys.getfilesystemencoding()))
>     # Decode and filter the list "manually" here.

i agree that it does not look very nice.

but does this look nicer? :)

path = u'some path'
files = os.listdir(path)

def check_and_fix_wrong_filename(file):
	if isinstance(file,unicode):
		return file
	else:
		#somehow convert it to unicode, and return it

files = [check_and_fix_wrong_filename(f) for f in files]

in other words, your opinion is that the proposed solution is not 
optimal, or that the current behavior is fine?

gabor


From brian at sweetapp.com  Thu Nov 23 16:09:48 2006
From: brian at sweetapp.com (Brian Quinlan)
Date: Thu, 23 Nov 2006 22:09:48 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
In-Reply-To: <ek4qtq$6vr$1@sea.gmane.org>
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>	<ek3uqa$8lm$1@sea.gmane.org>	<4565ED24.3050900@sweetapp.com>
	<ek4qtq$6vr$1@sea.gmane.org>
Message-ID: <45660E1C.9050005@sweetapp.com>

Fredrik Lundh wrote:
> Brian Quinlan wrote:
> 
>>> 4) [] and {} always create a new object every time they're evaluated.
>> Not quite. The empty tuple is cached:
>>
>>  >>> a = ()
>>  >>> b = ()
>>  >>> a is b
>> True
> 
> () isn't [] or {}, though.  time to switch to a bigger font? ;-)

Yeah, sorry I'm an idiot. I can't believe that I've been able to program 
successfully for so long when I can't recognize the different between a 
dictionary and a tuple :-)

Cheers,
Brian


From Gerald.Klix at klix.ch  Wed Nov 22 09:53:38 2006
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Wed, 22 Nov 2006 15:53:38 +0100
Subject: What's going on here?
In-Reply-To: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <45646472.8020904@klix.ch>

Perhaps this piece of code might explain the behaviour:


 >>> class C( object ):
...     __slots__ = ()
...
 >>> o = C()
 >>> o.a = 1
Traceback (most recent call last):
   File "<input>", line 1, in ?
AttributeError: 'C' object has no attribute 'a'


object behaves like having an implict __slots__ attribute.


HTH,
Gerald


Dale Strickland-Clark schrieb:
> Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
> [GCC 4.1.0 (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>a = object()
>>>>a
> 
> <object object at 0xb7bbd438>
> 
>>>>a.spam = 1
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'object' object has no attribute 'spam'
> 
>>>>class b(object):
> 
> ...    pass
> ...
> 
>>>>a = b()
>>>>a
> 
> <__main__.b object at 0xb7b4dcac>
> 
>>>>a.spam = 1
>>>>
> 
> 
> What is subclassing adding to the class here? Why can't I assign to
> attributes of an instance of object?



From piet at cs.uu.nl  Tue Nov  7 06:11:51 2006
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 07 Nov 2006 12:11:51 +0100
Subject: why does this unpacking work
References: <Qe9_g.129$1n3.3113@news.tufts.edu>
	<mailman.864.1161373067.11739.python-list@python.org>
Message-ID: <m264drmryg.fsf@ordesa.local>

>>>>> Carsten Haese <carsten at uniqsys.com> (CH) wrote:

>CH> On Fri, 2006-10-20 at 15:14, John Salerno wrote:

>>> What seems to be happening is that 'for x,y in t' is acting like:
>>> 
>>> for x in t:
>>> for y,z in x:
>>> #then it does it correctly

>CH> No, it's actually behaving like

>CH> for x in t:
>CH>   y,z = t
       y,z = x
>CH>   # do something with y and z

-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From phil at riverbankcomputing.co.uk  Sat Nov 18 17:51:46 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 18 Nov 2006 22:51:46 +0000
Subject: please help me choose a proper gui library.
In-Reply-To: <f81479dd0611181022h2ff6f51ejc0ea4f6e9a1634d4@mail.gmail.com>
References: <f81479dd0611180944h6916db1bs47ec2e05b4a2a399@mail.gmail.com>
	<200611181807.33571.phil@riverbankcomputing.co.uk>
	<f81479dd0611181022h2ff6f51ejc0ea4f6e9a1634d4@mail.gmail.com>
Message-ID: <200611182251.46664.phil@riverbankcomputing.co.uk>

On Saturday 18 November 2006 6:22 pm, krishnakant Mane wrote:
> On 18/11/06, Phil Thompson <phil at riverbankcomputing.co.uk> wrote:
> > You have to install Qt first. You only need to install the run-time
> > elements (ie. the DLLs) on the client's machine. Unless your application
> > is licensed under the GPL (and you are using the GPL version of Qt and
> > PyQt) then there are components of Qt that you must not install on the
> > client's machine.
>
> Yes, the software is licensed under gpl.  how do I determine what
> run-time elements I need to install on the clien'ts machine and what
> is supposed to  be skipped?

I've already said what you need. Try it and see if anything else is needed.

> > The only binary installer provided is for the GPL version of PyQt. Qt has
> > separate installers. It's easy enough to use something like NSIS to
> > create your own installer for your application that includes everything
> > that it needs.
>
> that's exactly what I am planning, only need to figure out what all do
> I need to package apart from the application executable.  by the way I
> will be using cx_freze for creating executables.  so I hope I will not
> require to also ship the PYQT modules?
>
> > PyQt fully supports Python 2.5.
>
> but my problem is that I will only be able to use python 2.4, is that
> ok?  the PYQT installer asks "you seam to have a version older than
> python25, would you still like to continue?"  is it safe to do so?  I
> did not find a gpl binary for PYQT that is made for python24.  please
> give the URL if possible.

You will have to compile PyQt yourself for Python 2.4. This is 
straightforward. When you install the GPL version of Qt it will install a 
copy of the MinGW compiler for you.

> > Google for the different ones and try them out.
>
> which is the best editor which I can consider simple, does auto
> indentation and has some kind of auto completion features?  it is ok
> if I don't get a gui designer.

Qt includes a GUI designer.

> > In addition to your application you need to distribute the Qt DLLs (and
> > plugins if you use them), the corresponding PyQt .pyd files and sip.pyd.
> > If you are using the GPL version of Qt then you may also need to consider
> > the MinGW DLLs. Finally you need to consider if you need to distribute
> > Python itself.
> >
> > You might like to look at tools like PyInstaller for creating single
> > executables.
>
> this is all confusing for me right now.  can you please give me any
> links possible for having a binary qt installer that will also install
> dlls required by PYQT?
> and how will I be able to determine what dll files and what other
> components I will need to ship with my installer?
> thanks.

Take it one step at a time and test your installation on a clean system.

Phil


From steve at holdenweb.com  Fri Nov 10 15:15:15 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Nov 2006 14:15:15 -0600
Subject: SyntaxError: Invalid Syntax.
In-Reply-To: <1163179827.707089.48920@m73g2000cwd.googlegroups.com>
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com>	<1163178336.281812.140580@f16g2000cwb.googlegroups.com>	<1163178581.231837.18120@h48g2000cwc.googlegroups.com>	<ej2ce8$vsc$1@cernne03.cern.ch>	<1163179622.691812.96170@h48g2000cwc.googlegroups.com>
	<1163179827.707089.48920@m73g2000cwd.googlegroups.com>
Message-ID: <ej2mia$mjh$1@sea.gmane.org>

ronrsr wrote:
> the syntax error comes in the main program, in any line that follows
> the import statement.
> 
in which case, don't you think it might be the "import" statement that's 
causing the problem. What is stopping you from showing us the whole 
source? Or at least the import statement as well as the statement that 
causes the syntax error to be reported. Maybe your module has an odd 
name like "from", for example.

We aren't psychic, you know (though some on this list come close).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From richardjones at optushome.com.au  Wed Nov  1 05:09:37 2006
From: richardjones at optushome.com.au (Richard Jones)
Date: Wed, 01 Nov 2006 21:09:37 +1100
Subject: 3d programming without opengl
References: <mailman.1526.1162280594.11739.python-list@python.org>	<12kf7gishr60ta3@corp.supernews.com>	<mailman.1566.1162322123.11739.python-list@python.org>
	<4547cc58$0$11970$afc38c87@news.optusnet.com.au>
	<mailman.1583.1162362305.11739.python-list@python.org>
Message-ID: <45487261$0$11970$afc38c87@news.optusnet.com.au>

Fredrik Lundh wrote:
> Richard Jones wrote:
>>> Pure Python doesn't necessarily imply "no graphics drawing code written
>>> in some other language", though.  You can get pretty far by using a 2D
>>> library for simple 3D rendering.
>> 
>> Someone wrote a 3D demo for the pygame.draw challenge*. It worked but
>> unfortunately he didn't end up finishing and submitting it. It had severe
>> performance limitations :)
> 
> someone just posted this to reddit:
> 
>      http://www.uselesspickles.com/triangles/demo.html
> 
> which I'd say qualifies as simple 3D with pretty decent performance
> given what it does and what platform it runs on...

OK, that's a pretty cool demo :)

My definition of "severe" would involve a slow-down if you tried to render
several of those relatively simple objects :)

On my Althon64 3500+ system running in Konqueror or Mozilla I can get four
windows viewing that page before performance really starts to drag.

I should convince Alex to dig up that old code - I always was curious to see
it. Hmm.


    Richard



From ronrsr at gmail.com  Tue Nov 28 02:23:57 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 23:23:57 -0800
Subject: splitting a long string into a list
In-Reply-To: <mailman.788.1164693655.32031.python-list@python.org>
References: <1164692082.272978.66720@14g2000cws.googlegroups.com>
	<mailman.788.1164693655.32031.python-list@python.org>
Message-ID: <1164698637.721659.169240@n67g2000cwd.googlegroups.com>

still having a heckuva time with this.

here's where it stand - the split function doesn't seem to work the way
i expect it to.


longkw1,type(longkw):   Agricultural subsidies; Foreign
aid;Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
<type 'list'> 1

longkw.replace(',',';')

Agricultural subsidies; Foreign aid;Agriculture; Sustainable
Agriculture - Support; Organic Agriculture; Pesticides, US, Childhood
Development


 kw = longkw.split("; ,")    #kw is now a list of len 1

kw,typekw= ['Agricultural subsidies; Foreign aid;Agriculture;
Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
Childhood Development, Birth Defects; Toxic Chemicals;Antibiotics,
Animals;Agricultural Subsidies


what I would like is to break the string into a list of the delimited
words, but have had no luck doing that - I thought split wuld do that,
but it doens't.

bests,

-rsr-


Robert Kern wrote:
> ronrsr wrote:
> > I have a single long string - I'd like to split it into a list of
> > unique keywords. Sadly, the database wasn't designed to do this, so I
> > must do this in Python - I'm having some trouble using the .split()
> > function, it doesn't seem to do what I want it to - any ideas?
>
> Did you follow the recommendations given to you the last time you asked this
> question? What did you try? What results do you want to get?
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco



From xi at gamma.dn.ua  Sun Nov 19 09:17:57 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Sun, 19 Nov 2006 16:17:57 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <1163935652.536330.240090@b28g2000cwb.googlegroups.com>
References: <mailman.430.1163877551.32031.python-list@python.org>
	<1163935652.536330.240090@b28g2000cwb.googlegroups.com>
Message-ID: <20061119141757.GB12399@58sirius016.dc.ukrtel.net>

On Sun, Nov 19, 2006 at 03:27:32AM -0800, Leo Kislov wrote:
> IDLE on Windows works fine for your example in interactive console:
> 
> >>> name = raw_input("What's your name? ")

Have you tried to use cyrillic characters in a Python string in
interactive console? When I do it, I get the "Unsupported characters in
input" error. For instance,

>>> print "??????"  # That's "Hi" in Russian.
Unsupported characters in input

>>>

> And another question: are you aware of the fact that recommended way to
> handle non-ascii characters is to use unicode type? Most of IDEs should
> work fine with unicode. 

Usually using unicode type gives you much more headache than benefits
unless you are careful enough to never mix unicode and str objects.

Anyway, I just want the interactive console of an IDE to behave like a
real Python console under a UTF-8 terminal (with sys.stdout.encoding ==
'utf-8').


Thanks,
Kirill


From edgomez at consultant.com  Mon Nov 27 15:32:08 2006
From: edgomez at consultant.com (Edwin Gomez)
Date: Mon, 27 Nov 2006 15:32:08 -0500
Subject: Python-list Digest, Vol 38, Issue 390
Message-ID: <20061127203212.0118A83986@ws1-2a.us4.outblaze.com>

Regarding Topic number 3: 3. Calling a thread asynchronously with a callback (Edwin Gomez):
Thanks Bjorn for you quick answer and by the way, that works.  Diez, in answer to your question regarding async callbacks in C#; C# runs in a multi threaded apartments.  Many times we'll setup listener objects in a dictionary and each member is responsible for monitoring and manipulating it's own data.  In the case where data is shared, then of course, we use a locking machanism.
> ----- Original Message -----
> From: python-list-request at python.org
> To: python-list at python.org
> Subject: Python-list Digest, Vol 38, Issue 390
> Date: Mon, 27 Nov 2006 19:45:03 +0100
> 
> 
> Send Python-list mailing list submissions to
> 	python-list at python.org
> 
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://mail.python.org/mailman/listinfo/python-list
> or, via email, send a message with subject or body 'help' to
> 	python-list-request at python.org
> 
> You can reach the person managing the list at
> 	python-list-owner at python.org
> 
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Python-list digest..."
> 
> Today's Topics:
> 
>     1. Re: Several entries on Tile and TableList at the Tkinter wiki
>        (jim-on-linux)
>     2. shtoom complicated install (Croteam)
>     3. Calling a thread asynchronously with a callback (Edwin Gomez)
>     4. Re: Active State and Komodo... (Trent Mick)
>     5. Re: working with files and directories (halex2000)
>     6. Re: Calling a thread asynchronously with a callback
>        (Diez B. Roggisch)
>     7. Re: Calling a thread asynchronously with a callback
>        (Bjoern Schliessmann)
>     8. python skipping lines? (lisa.engblom at gmail.com)
>     9. can't get cgi values (ronrsr)
>    10. Re: can't get cgi values (Fredrik Lundh)
>    11. Re: can't get cgi values (Paul McGuire)
> 
> From: jim-on-linux <inq1ltd at verizon.net>
> To: python-list at python.org
> Cc: Kevin Walzer <kw at codebykevin.com>
> Subject: Re: Several entries on Tile and TableList at the Tkinter wiki
> Date: Mon, 27 Nov 2006 12:29:58 -0500
> 
> 
> Thanks for posting this entry,
> 
> The fact that a wiki or help site doesn't get a
> lot of traffic is not an necessarily an indicator
> of it's usfulness.  It indicates to me that the
> product, in this case Tkinter, may be easy to use
> and understand, after working with it a little, A
> lot of help may not be necessary.
> 
> A good example is the py2exe help site.
> At one time not to long ago there might be 8 to 12
> post per day, or more. Today by my unscientific
> count method, I don't think there are more than 3
> to 4 post per week.  Yet, py2exe and Tkinter is
> almost as valuable as Python. If we couldn't
> build programs for Windows, where would a python
> programmes's money come from?
> 
> Thanks again,
> 
> jim-on-linux
> http://www.inqvista.com
> 
> 
> 
> On Sunday 26 November 2006 15:50, Kevin Walzer
> wrote:
> > I'm not sure how often members of this list
> > visit the Tkinter wiki at
> > http://tkinter.unpythonic.net/wiki/FrontPage; this wiki seems to 
> > have less traffic in general
> > than the Tcl/Tk wiki at http://wiki.tcl.tk.
> > Given that, I hope it's not out of line for me
> > to call attention to several pages that I've
> > posted about integrating Tile
> > (http://tktable.sourceforge.net/tile) and
> > TableList (http://www.nemethi.de,
> > http://wiki.tcl.tk/5527) into Tkinter
> > applications. I've noted a serious lack of
> > resources/documentation about these two
> > powerful Tk components. In addition to some
> > documentation, screenshots, and sample
> > applications, I've posted updated versions of
> > the original TableList and Tile wrappers by
> > Martin Franklin.
> >
> > I should take this moment to thank Mr. Franklin
> > for his work on these wrappers; whatever I
> > added to them was pretty minimal compared to
> > the heavy lifting he did. He originally posted
> > them on the Internet last year, but the site
> > that hosted them has gone dark. Anyway, Mr.
> > Franklin, if you are reading this, thank you
> > for your hard work; it has been enormously
> > helpful. I hope my own efforts extend your work
> > and make it even more useful for other Tkinter
> > developers.
> >
> > Here are the links:
> >
> > http://tkinter.unpythonic.net/wiki/UsingTile
> > http://tkinter.unpythonic.net/wiki/TileWrapper
> > http://tkinter.unpythonic.net/wiki/TableListWra
> > pper
> > http://tkinter.unpythonic.net/wiki/TableListTil
> > eWrapper
> > http://tkinter.unpythonic.net/wiki/PyLocateTile
> > http://tkinter.unpythonic.net/wiki/PyLocate
> >
> > Hope these prove useful to others, as starting
> > points for your own work if nothing else.
> > Corrections and improvements are of course
> > invited; it's a wiki!
> >
> >
> > --
> > Kevin Walzer
> > Code by Kevin
> > http://www.codebykevin.com
> 
> From: Croteam <vedran at v-programs.com>
> To: python-list at python.org
> Subject: shtoom complicated install
> Date: 27 Nov 2006 09:35:55 -0800
> 
> 
> Hello,
> 
> I have install problem about shtoom.How to I Install shtoom
> correct,when I install shtoom
> with setup.py (shtoom package setup file), it just make some directory
> (shtoom-0.2) and
> 3 python files with them.But just tell me this,when I was manual make
> folder by name "shtoom" (as write in shtoom package setup file) and in
> that folder put folders: app,audio,multicast,ui ,now I must
> "insert" python files from shtoom package into that folders but I don't
> know where  I must put
> every file?? In what folder.
> 
> 
> 
>                           I will appreciate any help
> 
>                           Regards,Vedran
> 
> From: Edwin Gomez <edgomez at consultant.com>
> To: python-list at python.org
> Subject: Calling a thread asynchronously with a callback
> Date: Mon, 27 Nov 2006 12:44:46 -0500
> 
> 
> I'm a C# developer and I'm new to Python.  I would like to know if 
> the concept of Asynchronous call-backs exists in Python.  Basically 
> what I mean is that I dispatch a thread and when the thread 
> completes it invokes a method from the calling thread.  Sort event 
> driven concept with threads.
> 
> 
> Thanks.
> 
> Ed Gomez
> 
> From: Trent Mick <trentm at activestate.com>
> To: Steve Thompson <sthompson at creativewebnet.com>
> Cc: python-list at python.org
> Subject: Re: Active State and Komodo...
> Date: Mon, 27 Nov 2006 09:48:45 -0800
> 
> 
> Steve Thompson wrote:
> > Hello all,
> >
> > I was wondering the differnced there were betwee Active State's python and
> > the open source version of python.
> 
> Here is the best answer to that:
> http://groups.google.com/group/comp.lang.python/tree/browse_frm/thread/e8291fcb1418e80/16f39060f654402f?rnum=1&hl=en&q=ActivePython+trent&_done=%2Fgroup%2Fcomp.lang.python%2Fbrowse_frm%2Fthread%2Fe8291fcb1418e80%2F98c87a6a5dc8f3c0%3Ftvc%3D1%26q%3DActivePython+trent%26hl%3Den%26#doc_b6f732ab2c8434ef
> http://tinyurl.com/y7r47q
> 
> 
> > Would I have to unistall my opend souce
> > python?
> 
> No. As BartlebyScrivener wrote you shouldn't do that. You can 
> easily install ActivePython side-by-side with another Python 
> install on Linux.
> 
> 
>  > Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
> > unler SuSE Linux v. 10.i?
> >
> > Addionally, is the eric IDE (version 3) an acceptible IDE or are there
> > more easy and more productive IDE's for perl?
> 
> *I* like Komodo, but then I am biased because I am one of its developers. :)
> I presume you meant Python instead of Perl there, but if not, 
> Komodo does support Perl as well as Python (and PHP, JavaScript, 
> Ruby, Tcl and XSLT too).
> 
> This is a pretty good review of Python IDEs (although note that 
> most, if not all, of the IDEs reviewed there will have advanced a 
> few versions).
> 
> http://spyced.blogspot.com/2005/09/review-of-6-python-ides.html
> 
> 
> Komodo 4 is currently under public beta (Komodo 4 beta 1 is out now 
> and beta 2 should be released later this week). Try it out:
> 
> http://www.activestate.com/products/komodo/beta.plex#features
> 
> 
> Cheers,
> Trent
> 
> -- Trent Mick
> trentm at activestate.com
> 
> From: halex2000 <powernews at libero.it>
> To: python-list at python.org
> Subject: Re: working with files and directories
> Date: Mon, 27 Nov 2006 18:01:20 GMT
> 
> 
> 
> "Duncan Booth" <duncan.booth at invalid.invalid> ha scritto nel messaggio
> news:Xns98888B8FD9B32duncanbooth at 127.0.0.1...
> > "halex2000" <powernews at libero.it> wrote:
> >> "Thomas Ploch" <Thomas.Ploch at gmx.net> ha scritto nel messaggio
> >> news:mailman.766.1164631069.32031.python-list at python.org...
> >>> Have you actually even tried to find some "documentation"?
> >>> Have you placed a google search "python directories rename files"?
> >>> Thomas
> >>
> >> Actually I did it on the documentation file provided with the windows
> >> distribution. I took a look at 11 ("File and Directory Access") but
> >> the listed functions doesn't appear to be what I need. 14.1.4 should
> >> do the job, but was not as intuitive to find as the previous one.
> >>
> > Do you know about the search tab in windows help? Searching for "rename
> > files", or indeed a search identical to the one suggested for Google will
> > both find 14.1.4 as the top hit.
> 
> I'm aware of it, thank you. I usually don't use to ask for infos that I
> could easily find myself in a few seconds, but I had not the time at the
> moment to even start a search (of course, If I knew it would have been so
> quick, I would have done it myself). I was just under the impression that I
> was looking in the wrong place.
> 
> From: Diez B. Roggisch <deets at nospam.web.de>
> To: python-list at python.org
> Subject: Re: Calling a thread asynchronously with a callback
> Date: Mon, 27 Nov 2006 19:07:34 +0100
> 
> 
> Edwin Gomez wrote:
> 
> > I'm a C# developer and I'm new to Python.  I would like to know if the
> > concept of Asynchronous call-backs exists in Python.  Basically what I
> > mean is that I dispatch a thread and when the thread completes it invokes
> > a method from the calling thread.  Sort event driven concept with threads.
> 
> Counter question: does such a thing exist in C#, and if, is it bound to some
> existing event loop?
> 
> I'm really curious, because having code being interrupted at any time by a
> asynchronous callback strikes me as dangerous. But then maybe I'm just a
> whimp :)
> 
> Diez
> 
> From: Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>
> To: python-list at python.org
> Subject: Re: Calling a thread asynchronously with a callback
> Date: Mon, 27 Nov 2006 19:11:56 +0100
> 
> 
> Edwin Gomez wrote:
> 
> > I'm a C# developer and I'm new to Python.  I would like to know if
> > the concept of Asynchronous call-backs exists in Python.
> 
> Sure. Either with this:
> 
> http://twistedmatrix.com/projects/core/documentation/howto/async.html
> 
> Or manually using select().
> 
> > Basically what I mean is that I dispatch a thread and when the
> > thread completes it invokes a method from the calling thread. 
> > Sort event driven concept with threads.
> 
> What you describe here isn't the only way to do asynchronous
> callbacks. See above for a simpler way.
> 
> Regards,
> 
> 
> Bj?rn
> 
> --
> BOFH excuse #233:
> 
> TCP/IP UDP alarm threshold is set too low.
> 
> From: lisa.engblom at gmail.com
> To: python-list at python.org
> Subject: python skipping lines?
> Date: 27 Nov 2006 10:17:57 -0800
> 
> 
> Hi,
> 
> I've just started programming in python, and have run into an
> unexpected problem.  I am using python to pull text data from some csv
> files.  I have one file that has the important identifiers (name, etc)
> and other files with lots of other data.  I wrote a function that takes
> the file name and identifiers as inputs, selects the data I need, and
> outputs it to another file.  This function (PullData) seems to work
> fine.
> 
> In the same .py file, but separate from the function, I entered used
> "for line in file" to step through each line in my identifier file and
> feed the identifiers into my PullData function.  It works fine for the
> first entry in my identifier file, but it will not call the function
> again.  It will execute lines before or after the appropriate number of
> times given the number of lines in the identifier file.  i just put in
> a dummy counter variable to try to figure out why it wasn't working)
> ... but it always skips the function call after the first line.
> 
> Any ideas of what could be the problem?
> 
> From: ronrsr <ronrsr at gmail.com>
> To: python-list at python.org
> Subject: can't get cgi values
> Date: 27 Nov 2006 10:28:54 -0800
> 
> 
> I'm having trouble extracting cgi parameters in my code - this is a web
> application, so I only know the line that's causing the problem.
> 
> here's the info I know:
> 
> form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
> MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
> 'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
> April 2002\\r\\n       \\r\\n       \r\n       '),
> MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
> small number of agri-businesses, many of them large corps. Yet these
> subsidies are 6 times what rich countries provide in foreign aid to a
> developing world that includes 5 billion people.\\r\\n       \r\n
> '), MiniFieldStorage('updatebutton', 'Update')])
> form.has_key("citation") = True
> 
> 
> 
>       fileHandle.write("here aer the haskeys");
>       fileHandle.write( str(form.has_key("citation")))
>      /* returns TRUE */
> 
>       temp = str(form("citation").value)
>           /* python stops here,
> 
>              form("citation appears to be undefined */
> 
> 
> 
>       print (str(form("citation").value))
>    /* this doesn't work, either */
> 
> 
> 
> 
>       if form.has_key("keywords"):                                  /*
> neither does this */
>           keywords = str(form["keywords"].value)
>       else:
>            keywords = "k"
> 
> 
> 
> 
> 
> 
> any ideas on what the problem is?
> 
> thank you so much.
> 
> -rsr-
> 
> From: Fredrik Lundh <fredrik at pythonware.com>
> To: python-list at python.org
> Subject: Re: can't get cgi values
> Date: Mon, 27 Nov 2006 19:40:36 +0100
> 
> 
> ronrsr wrote:
> 
> > I'm having trouble extracting cgi parameters in my code - this is a web
> > application, so I only know the line that's causing the problem.
> 
> seen this:
> 
>      http://docs.python.org/lib/module-cgitb.html
> 
> ?
> 
> >      temp = str(form("citation").value)
> 
> did you perhaps mean form["citation"] ?
> 
> </F>
> 
> From: Paul McGuire <ptmcg at austin.rr._bogus_.com>
> To: python-list at python.org
> Subject: Re: can't get cgi values
> Date: Mon, 27 Nov 2006 18:41:23 GMT
> 
> 
> form("citation").value
> 
> Is form some form of dict?  If so, then this should be something like:
> 
> form["citation"]
> 
> If not, then maybe value is a function, requiring ()'s to actually invoke
> it.
> 
> -- Paul
> 
> --
> http://mail.python.org/mailman/listinfo/python-list

>



From nyamatongwe+thunder at gmail.com  Thu Nov  2 17:53:23 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Thu, 02 Nov 2006 22:53:23 GMT
Subject: Keyboard interrupts, Idle vs. SciTE
In-Reply-To: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
References: <1162504504.220386.127570@h54g2000cwb.googlegroups.com>
Message-ID: <DFu2h.57701$rP1.32384@news-server.bigpond.net.au>

John Ladasky:

> Under SciTE, I do not get my "exiting program" message.  Instead, I get
> the standard SciTE abort message:
> 
> 
>> Process failed to respond; forcing abrupt termination...
>> Exit code: 1
> 
> 
> I much prefer the SciTE environment to Idle.  Is there any way that I
> can rewrite my program to restore the keyboard interrupt function under
> SciTE?  Alternately, is there some setting that I can change in SciTE
> to accomplish the same effect?

    This is on Windows - its generally a good idea to say which platform 
you are using. SciTE runs Python as an external process and tries to 
interrupt by writing a Ctrl+Z to the input of the running process which 
works for many interactive programs. If that fails, it calls 
TerminateProcess and displays the message you see.

    There is some dead code to call 
GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT... in scite/src/SciTEWin.cxx 
that you could try to enable and rebuild SciTE.

    Idle may be running the code in-process but even if it is running it 
out of process in debugging mode, it still has much more knowledge of 
the execution environment. SciTE uses the same code for running Python 
as for running grep or javac.

    Neil


From elicriffield at gmail.com  Mon Nov 13 18:16:45 2006
From: elicriffield at gmail.com (Eli Criffield)
Date: 13 Nov 2006 15:16:45 -0800
Subject: tab compleation input
In-Reply-To: <mailman.96.1163450419.32031.python-list@python.org>
References: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>
	<1163441927.046482.218330@e3g2000cwe.googlegroups.com>
	<1163446215.993860.325430@h48g2000cwc.googlegroups.com>
	<mailman.96.1163450419.32031.python-list@python.org>
Message-ID: <1163459805.860905.160310@b28g2000cwb.googlegroups.com>


#Thanks for the link from Fredrik Lundh

#from http://effbot.org/librarybook/readline.htm
#You do it like this,

class Completer:
    def __init__(self, words):
        self.words = words
        self.prefix = None
    def complete(self, prefix, index):
        if prefix != self.prefix:
            self.matching_words = [
                w for w in self.words if w.startswith(prefix)
                ]
            self.prefix = prefix
        try:
            return self.matching_words[index]
        except IndexError:
            return None

import readline

# a set of more or less interesting words
validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]

completer = Completer(validanswers)

readline.parse_and_bind("tab: complete")
readline.set_completer(completer.complete)

# try it out!
while 1:
    answer = raw_input("Answer the Question: ")
    if answer not in validanswers:
       print "Wrong!"
    else:
       print "Your answer is",answer



Fredrik Lundh wrote:
> Eli Criffield wrote:
>
> > Not sure what your trying to do, but it doesn't work. :)
> > valid doesn't exsist
>
> it's assigned to by the for-in loop, and is only used inside it.
>
> > Either way, it doesn't take the tab tell after you hit enter, Not
> > really what i was getting at. What i want is like a bash shell prompt.
>
> you can use the "readline" module with a custom completer class.  see
> the second example on this page:
> 
>      http://effbot.org/librarybook/readline.htm
> 
> </F>



From fredrik at pythonware.com  Fri Nov 17 14:39:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 20:39:54 +0100
Subject: remove a list from a list
In-Reply-To: <ejl22m$l60$1@sea.gmane.org>
References: <ejkv1u$ajf$1@sea.gmane.org> <ejl22m$l60$1@sea.gmane.org>
Message-ID: <ejl36a$odd$2@sea.gmane.org>

Fredrik Lundh wrote:

>> What is a *nice* way of doing it?
> 
> r = [i for i in e if i not in l]

and swap l and e, add a few calls to lower, and start using better 
variable names in the future.

</F>



From bj_666 at gmx.net  Sat Nov 25 06:14:28 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 25 Nov 2006 12:14:28 +0100
Subject: Invoking Python from Cygwin problem.
References: <1164385876.755749.139020@l39g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.25.11.14.25.36805@gmx.net>

In <1164385876.755749.139020 at l39g2000cwd.googlegroups.com>, Ant wrote:

> ----------------------------------------------------------------------------------
> #!/usr/bin/python
> print "Testing",
> 
> Running the bash script, I get the following output:
> 
> OKt var: Testing
> Test var2: Test2 OK
> 
> Does anyone have any idea why the script would mess up the first echo?
> Are there some kind of control characters being appended to the python
> output in Windows? Looks like a CR character, but why?

It's a feature.  The `sys.stdout` object remembers if the last ``print``
ended in a comma (see the `sys.stdout.softspace` attribute) and when the
interpreter executes its shutdown code and that `softspace` attribute is
set, an extra '\n' is printed.

Ciao,
	Marc 'BlackJack' Rintsch


From http  Wed Nov 22 23:35:30 2006
From: http (Paul Rubin)
Date: 22 Nov 2006 20:35:30 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
Message-ID: <7xodqyn5kd.fsf@ruckus.brouhaha.com>

"tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
> Some of you may have noticed the launch of the Python Journal a while
> back. Due to artistic differences, the journal has now been re-launched
> as The Python Papers. It is available under a Creative Commons License,
> something we felt was appropriate given its nature. Many here commented
> that this was important to them, and it is important to us also.

But it looks like it's a noncommercial-use-only license, making it
impermissible to re-use the article contents in, say, expanding the
Python documentation.

    2.) Is it free?
    A) Yes, as in beer and as in freedom. Creative Commons 2.5
    Noncommercial, attribution, share-alike.

Free as in beer, certainly yes.  However, the noncommercial
restriction prevents it from being free as in freedom, according to
the folks who first drew the distinction:

http://www.gnu.org/philosophy/free-sw.html

    You may have paid money to get copies of free software, or you may
    have obtained copies at no charge. But regardless of how you got your
    copies, you always have the freedom to copy and change the software,
    even to sell copies.

    Free software does not mean non-commercial. A free program must be
    available for commercial use, commercial development, and commercial
    distribution. Commercial development of free software is no longer
    unusual; such free commercial software is very important.


From sjmachin at lexicon.net  Fri Nov 24 15:52:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 12:52:59 -0800
Subject: Active State and Komodo...
In-Reply-To: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
Message-ID: <1164401579.895042.47000@l39g2000cwd.googlegroups.com>


Steve Thompson wrote:
> Hello all,
>
> I was wondering the differnced there were betwee Active State's python and
> the open source version of python. Would I have to unistall my opend souce
> python? Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
> unler SuSE Linux v. 10.i?
>
> Addionally, is the eric IDE (version 3) an acceptible IDE or are there
> more easy and more productive IDE's for perl?
>
> I'm urining Gnome v. 12.2.2 and Eric v 3.8.1

I'm not sure which to recommend: a spelling checker or a catheter :-)



From mcdurr at gmail.com  Wed Nov  1 19:04:59 2006
From: mcdurr at gmail.com (mcdurr at gmail.com)
Date: 1 Nov 2006 16:04:59 -0800
Subject: Computing FFT with Python NumPy 1.0
Message-ID: <1162425898.984234.151740@i42g2000cwa.googlegroups.com>

I recently installed Python 2.5 on Windows and also installed numpy
1.0.  I'd like to compute an FFT on an array of numbers but I can't
seem to access the FFT function.  I'm fairly new to Python (obviously)
and I can't seem to find documentation to match my distribution of
numpy and I can't figure out how to access the FFT function.

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.

IDLE 1.2
>>> from numpy import *
>>> a=array((1,2,3,2,1,2,3,2,1))
>>> fft(a)

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    fft(a)
TypeError: 'module' object is not callable
>>> 

Help appreciated thanks.



From fredrik at pythonware.com  Mon Nov 27 07:36:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Nov 2006 13:36:45 +0100
Subject: working with files and directories
References: <7IAah.58105$uv5.416763@twister1.libero.it>
Message-ID: <ekem4t$fmt$1@sea.gmane.org>

"halex2000" wrote:

> Hi all, I'm new with Python, and I thought to use it to automatically rename some files in a 
> directory, but I don't know where should I search the functions: to get all the files of a 
> directory, to rename the files and so on.

see

    http://effbot.org/pyfaq/how-do-i-delete-a-file-and-other-file-questions.htm
    http://docs.python.org/tut/node12.html

and the relevant modules in the library reference.

</F> 





From spedrosa at gmail.com  Tue Nov 14 15:59:24 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 14 Nov 2006 12:59:24 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <1163466041.196606.254700@i42g2000cwa.googlegroups.com>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163315927.963179.114030@m73g2000cwd.googlegroups.com>
	<1163353941.3497.45.camel@localhost.localdomain>
	<4558BE80.9010909@hobbshouse.org>
	<mailman.104.1163454913.32031.python-list@python.org>
	<1163466041.196606.254700@i42g2000cwa.googlegroups.com>
Message-ID: <1163537964.142102.327540@m7g2000cwm.googlegroups.com>


Carl Banks escreveu:

> Steve Holden wrote:
> > In fact most Python doesn't use such constructs, though I'll admit the
> > occasional __init__ is more or less inevitable once you start using the
> > object-oriented features more than casually.
>
> Occasional?  I don't know about you, but I use __init__ in 99% of the
> classes I define.  :)  I don't think __special_symbols__ are manifestly
> unsuitable for newbies--they're just special.
>
> I was curious how much I used these symbols.  For my current largish
> project:
>
>     306 __init__
>      68 __future__
>      44 __dict__
>       3 __name__
>       3 __main__
>       3 __import__
>       3 __builtin__
>       2 __str__
>       2 __file__
>       1 __setitem__
>       1 __setattr__
>       1 __repr__
>       1 __or__
>       1 __ne__
>       1 __int__
>       1 __getitem__
>       1 __getattribute__
>       1 __eq__
>       1 __call__
>       1 __add__
>
> Excepting my use of __dict__, not a whole lot advanced usage there, and
> I am NOT the kind of person who's afraid to do advanced things when
> it's useful.  Much of the advanced stuff, including __dict__, is for
> debugging.  (I have a lot of classes that acquire resources that I must
> explicity release, so I clear the __dict__ to catch any post-release
> accesses, which could cause subtle failures otherwise.)
>
>
> Carl Banks

Well, I *hate* underscores with a passion. So it is kinda frustrating
that I *have* to say "__init__". The fact that the coding conventions
for Python suggest things such as methods_called_this_or_that do not
help. Everything else seems fine, since if there's voodoo involved, it
had best be sticking out from the text in big, bloody, blinking, red
letters.

I know, there's noone preventing me from doing otherwise (except for
that blasted __init__). I'd like to follow the pack here, tho.


Stephen



From sjmachin at lexicon.net  Wed Nov 22 19:29:53 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 16:29:53 -0800
Subject: AVL Balancing
References: <1164154965.338691.327010@j44g2000cwa.googlegroups.com>
	<1164158188.787394.25990@b28g2000cwb.googlegroups.com>
	<1164240291.176865.82670@l39g2000cwd.googlegroups.com>
Message-ID: <1164241793.818026.51740@h54g2000cwb.googlegroups.com>

scbauer wrote:
> John Machin wrote:
> > scba... at gmail.com wrote:
> > > Im working on an AVL tree
> >
> > Is this homework?
> Yes, this is homework.

It was a rhetorical question :-)
>
> >
> > > that consists of balancing the tree everytime
> > > you add an object.
> >
> > That's a peculiar kind of AVL tree. Normally it is *not* necessary to
> > balance the tree every time a node is added -- it's done only if a
> > constraint is breached.
>
> You're right the AVL Tree shouldnt be updated everytime.
>
> >
> > > Im not quite grasping the concept on how to do this
> > > with python.
> >
> > Could you do it in any other language?
> No, this is an Advanced Algorithms class  have to use python

I meant: do you have the ability ("can") (not the permission ("may"))
to do it in another language.

>
> >
> > > I have seen a few topics on the web about this, and i
> > > clearly understand how when the balance of an AVL tree get to 2 or -2
> > > you have to do a R, L, LR, or a RL rotation. Could anyone possibly help
> > > me/point me in the right direction as far as checking the balance and
> > > actually balancing the tree? Thanks in advance
> >
> class AVLTree:
>     """Holds operations of tree"""
>     def __init__(self):
>
>         self.__root = None
>         self.__stack=[]
>         stack = self.__stack
>
>    def addNode(self, data):
>         """ Add node for tree"""
>         return Node(data)
>
>     def insert(self, data):
>         if self.__root == None:
>             self.__root = Node(data)
>         else:
>             current = self.__root
>             done = False
>             while not done:
>                 if data < current.get_data():
>                     if current.left == None:
>                         current.left = Node(data)
>                         stack.append(current)
>
>                         done = True
>                     else:
>                         current = current.left
>                 else:
>                     if current.right == None:
>                         current.right = Node(data)
>                         stack.append(current)
>
>                         done = True
>                     else:
>                         current = current.right
>

and where's the definition of your Node class?

> > Perhaps if you could show us what you have done already -- I'd be
> > expecting a class to represent a node, and maybe another to represent
> > the root of the tree -- and give us an idea of your Python proficency
> > level (so that we can tailor the advice accordingly), we could help
> > you.
>
> Basically what im trying to do is use a stack to keep track of the
> items in the AVL tree so that rotations will go smoothly. Having
> problems with the stack getting initialized and actually storing the
> data there. So that i can reference the elements stack[-3].left =
> stack[-2].right and so on for balancing.

... and avoiding trouble when there are fewer than 3 elements in the
stack.

I presume that you a righteous dude, and are avoiding the temptation to
google for "AVL tree Python".

So, I'll give you just one hint:

Being righteous, you may wish to examine the ancient scriptures: find
volume 3 of the gospel according to Saint Donald Knuth; therein lies a
description (in arcane notation) of how to insert into a "balanced
tree" without using a stack. If a dumb cluck like me could translate
that into C (with no gotos) and get it to work, a smart lad should have
no trouble translating it into Python.

HTH,
John



From cousinstanley at hotmail.com  Thu Nov 23 18:42:05 2006
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Thu, 23 Nov 2006 17:42:05 -0600
Subject: SQLite3__Python2.3-SQLite__Problem
Message-ID: <1164325325_8617@sp6iad.superfeed.net>


  It's been almost 2 years since I've done anything 
  with Python and SQLite and I'm having some problems
  that I don't recall from my last usage ....

  It seems that SQLite3 data bases created at the command line 
  and those created using the sqlite module from within Python
  are no longer compatible with each other using the setup that 
  I now have ....

  I thought I remembered that the data bases created either way
  were always 100% transparent with each other and that I could
  use an SQLite3 data base either from the command line or from
  within Python without any problems at all ....

  I did a fair amount of Google-izing looking for related problems
  but didn't have much success .... 
  
  I did find one entry in the Debian Bug Tracking System
  that had some discussions about SQLite3 & Python-SQLite versioning
  but the original errors mentioned didn't seem to be of the same nature
  as what i'm seeing here .... 
  
  ===========================================================  
  
  Operating System .... Debian GNU/Linux Sarge 

    python2.3 ........... Installed :  2.3.5-3sarge2
    
    python2.3-sqlite .... Installed :  1.0.1-2
    
    sqlite3 ............. Installed :  3.2.1-1
    
    libsqlite3-0 ........ Installed :  3.2.1-1

  
  Date            SQLite3 Data Base       Created Via
  ==========      =================       ===========
  
  2005-02-20 .... abook_00.sql3 ......... sqlite3 command line
  2006-11-23 .... abook_01.sql3 ......... python module
  
  SQLite3 data bases created via the command line
  and those created using the python2.3-sqlite package
  version 1.0.1-2 from within a Python program 
  are  not  compatible with each other .... 
  
  If I create an SQLite3 data base from the command line
  and populate it with data, then I cannot use that db
  from Python .... 
  
  If I create an SQLite3 data base from within Python
  and populate it with data, then I cannot use that db
  from the command line .... 
  
  The following console sessions illustrate the problem ....
  
  ===========================================================
  
  # Using an SQLite3 data base created at the command line
  
  $ sqlite3 abook_00.sql3
  SQLite version 3.2.1
  Enter ".help" for instructions
  sqlite>
  sqlite> .schema
  CREATE TABLE addr( nid int ,
    atype int ,
    aid int ,
    address varchar( 128 ) );
  CREATE TABLE names( nid int,
    name varchar( 32 ) );
  sqlite>
  sqlite> .mode column
  sqlite> .width 16 32
  sqlite>
  sqlite> select names.name , addr.address
     ...> from   names , addr
     ...> where  names.nid = addr.nid ;
  Bugs Bunny        Rabbit Hole 0
  Donald Duck       Duck Pond 1
  Goofy             G Hut 2
  Mickey Mouse      Mouse Hole 3
  Sylvester         Cat House 4
  sqlite>

  
  ===========================================================
  
  # Try to query that data base from within Python
  
  $ python abook_select.py abook_00.sql3
  Traceback (most recent call last):
  File "abook_select.py", line 18, in ?
    dbc      = sqlite.connect( db = path_db )
  File "/usr/lib/python2.3/site-packages/sqlite/__init__.py", line 61, in connect
    return Connection(*args, **kwargs)
  File "/usr/lib/python2.3/site-packages/sqlite/main.py", line 445, in __init__
    self.db = _sqlite.connect(database, mode)
  _sqlite.DatabaseError: file is encrypted or is not a database
  
  
  ===========================================================  
  
  # Try the same query on a Python-created data base 
  
  $ python abook_select.py abook_01.sql3

    abook_select.py

        Name ............ Address

        Donald Duck  .... Duck Pond 1
        Bugs Bunny   .... Rabbit Hole 0
        Mickey Mouse .... Mouse Hole 3
        Goofy        .... G Hut 2
        Sylvester    .... Cat House 4

        
  ===========================================================
  
  # Try to use the Python-created data base from the command line
  
  $ sqlite3 abook_01.sql3
  SQLite version 3.2.1
  Enter ".help" for instructions
  sqlite>
  sqlite> .schema
  Error: file is encrypted or is not a database
  sqlite>

 
-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
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From fredrik at pythonware.com  Wed Nov  1 09:26:57 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 15:26:57 +0100
Subject: report progress from C function
In-Reply-To: <20061101141548.90357.qmail@web88313.mail.re4.yahoo.com>
References: <eia9nq$gq8$1@sea.gmane.org>
	<20061101141548.90357.qmail@web88313.mail.re4.yahoo.com>
Message-ID: <eiaarg$l24$2@sea.gmane.org>

Michael S wrote:

> What if it doesn't do exactly what you need to? How do
> you debug through that code?

same way as you'd hunt for bugs in the Python-to-bytecode compiler, or 
your C compiler.

</F>



From noah.rawlins at comcast.net  Tue Nov 21 19:48:23 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Tue, 21 Nov 2006 19:48:23 -0500
Subject: Parsing/Splitting Line
In-Reply-To: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
Message-ID: <kc-dnXWhCOXEA_7YnZ2dnUVZ_hmdnZ2d@comcast.com>

acatejr at gmail.com wrote:
> I have a text file and each line is a list of values.  The values are
> not delimited, but every four characters is a value.  How do I get
> python to split this kind of data?  Thanks.
> 

I'm a nut for regular expressions and obfuscation...

import re
def splitline(line, size=4):
     return re.findall(r'.{%d}' % size, line)

 >>> splitline("helloiamsuperman")
['hell', 'oiam', 'supe', 'rman']


or if you care about remainders...

import re
def splitline(line, size=4):
     return re.findall(r'.{%d}|.+$' % size, line)

 >>> splitline("helloiamsupermansd")
['hell', 'oiam', 'supe', 'rman', 'sd']


noah


From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Tue Nov 21 19:37:27 2006
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Tue, 21 Nov 2006 19:37:27 -0500
Subject: How to sort list
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
Message-ID: <Michael.J.Fromberger-486BFF.19372621112006@localhost>

In article <1164136547.137154.126740 at m73g2000cwd.googlegroups.com>,
 "Lad" <python at hope.cz> wrote:

> I have a list of emails and I would like to sorted that list by domains
> E.g.
> If the list is
> 
> Emails=['a at hotmail.com','a at yahoo.com','b at hotmail.com','c at yahoo.com',....]
> 
> after sorting I would like to have
> Emails=['a at hotmail.com','b at hotmail.com','a at yahoo.com','c at yahoo.com',....]
> 
> What is the best/easiest way?

One reasonable option is to use the .sort() method of a list:

  Emails.sort(key = lambda s: list(reversed(s.split('@'))))

The "key" parameter specifies how to obtain a sort key from each element 
in the source list.

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From tomas at fancy.org  Wed Nov 29 15:17:46 2006
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 29 Nov 2006 12:17:46 -0800
Subject: type(foo) == function ?
Message-ID: <f7qrm293cbnt3nsci49ofmornu4um8irs7@4ax.com>

I'd like to figure out if a given parameter is a function or not.

E.g.

>>> type(1)
<type 'int'>
>>> type(1) == int
True

implies:

>>> def foo():
...   pass
...
>>> type(foo)
<type 'function'>
>>> type(foo) == function
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'function' is not defined

Is there a way I can know if 'foo' is a function?

thanks,
-tom!


From cjw at sympatico.ca  Thu Nov 23 19:02:34 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 23 Nov 2006 19:02:34 -0500
Subject: [ANN] pylint 0.12.2 / astng 0.16.3
In-Reply-To: <20061123154535.GB21319@crater.logilab.fr>
References: <20061123154535.GB21319@crater.logilab.fr>
Message-ID: <ek5cr0$359$1@sea.gmane.org>

Sylvain Th?nault wrote:
> Hi there !
> 
> I'm pleased to announce new bugs fix releases of pylint and astng. Most
> bug discussed more or less recently on the python-projects mailing list
> should be fixed by those releases, and astng inference capability has
> been enhanced for some construction, so upgrade is recommended.
> 
> Visit the respective projects'page of our fresh new .org site to get the
> latest source distribution :o)
> http://www.logilab.org/project/name/pylint
> http://www.logilab.org/project/name/logilab-astng
> 
> Enjoy !
I've had difficulty establishing an ftp connection either with FireFTP 
or WS_FTP.  I get a message 331 Password required.

Could you clarify please?

Colin W.



From vedran at v-programs.com  Wed Nov 29 06:09:44 2006
From: vedran at v-programs.com (Croteam)
Date: 29 Nov 2006 03:09:44 -0800
Subject: shtoom or yate client source code
Message-ID: <1164798584.493809.121110@j44g2000cwa.googlegroups.com>

Hello,

Can somebody give me (if is that possible) source code of shtoom or
yate client

( e.g. yate.exe or shtoom.exe client source code)


and, Do you know any python voip module except shtoom and yate,if you
know please tell me.


                                 I will appreciate any help!!


                                 Regards,Vedran



From uche.ogbuji at gmail.com  Sat Nov 18 02:38:25 2006
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: 17 Nov 2006 23:38:25 -0800
Subject: lxml/ElementTree and .tail
In-Reply-To: <mailman.251.1163679925.32031.python-list@python.org>
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
	<mailman.251.1163679925.32031.python-list@python.org>
Message-ID: <1163835505.102190.140060@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> Chas Emerick wrote:
> > If I'm wrong, just chalk it up to the fact that this is the first
> > time I've ever looked at the Infoset spec, and I'm simply confused.
>
> the Infoset spec *is* the essence of XML; if you don't realize that an
> XML document is just a serialization of a very simple data model, you're
> bound to be fighting with XML all the time.

I certainly have never liked the aspects of the ElementTree API under
present discussion.  But that's not as important as the fact that I
think the above statement is misleading.  There has always been a
battle in XML between the people who think the serialization is
preeminent, and those who believe some data model is preeminent, but
the reality is that XML 1.0 (an 1.1) is a spec *defined* by its
serialization.  Infoset is a secondary and optional spec.  In fact, I
think it's clear that Infoset is not even the preeminent *data model*
of the XML world.  That distinction goes to the XPath data model, which
is quite different from the Infoset.

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From fredrik at pythonware.com  Tue Nov 14 06:31:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 12:31:23 +0100
Subject: Seeking assistance - string processing.
In-Reply-To: <1163503056.295402.11410@m7g2000cwm.googlegroups.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>	<mailman.125.1163500986.32031.python-list@python.org>	<1163501742.957889.57410@m73g2000cwd.googlegroups.com>	<ejc81g$32g$00$1@news.t-online.com>
	<1163503056.295402.11410@m7g2000cwm.googlegroups.com>
Message-ID: <ejc9e9$u7n$1@sea.gmane.org>

billpaterson2006 at googlemail.com wrote:

> But I'm still having a spot of bother with the === addition
> 
> it would seem that if there is no whitespace after the ===test
> then the new === gets added to the next line
> 
> e.g file contains:
> 
> ===test (and then no whitesapace/carriage returns or anything)
> 
> and the result is:
> 
> ===test
> ===

that's probably because it *does* contain a newline.  try printing the 
line with

    print repr(line)

before and after you make the change, to see what's going on.

> I tried fidding aruond trying to make it add whitespace but it didnt
> work. 

peter's complete example contains one way to solve that:

     if line.startswith("==="):
         line = line.rstrip() + "===\n"

 > What do you think I should do?

reading the chapter on strings in your favourite Python tutorial once 
again might help, I think.  python have plenty of powerful tools for 
string processing, and most of them are quite easy to learn and use; a 
quick read of the tutorial and a little more trial and error before 
posting should be all you need.

</F>



From duncan.booth at invalid.invalid  Tue Nov 21 08:14:17 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Nov 2006 13:14:17 GMT
Subject: Reference class in class creation
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
	<a1c52$4562f68e$547078de$28920@news.chello.at>
Message-ID: <Xns988284E97F275duncanbooth@127.0.0.1>

Gregor Horvath <gh at gregor-horvath.com> wrote:

> Diez B. Roggisch schrieb:
> 
>> Anything wrong with:
>> 
>> class Foo(object):
>>    pass
>> 
>> Foo.a = Foo
>> 
>> ?
> 
> Thanks.
> The problem with this is that there is also metaclass hacking involved
> which relies on "a" 's creation in the class body. In your suggestion
> "a" is not present when __new__ of the metaclass is called.
> 
The class doesn't exist until the metaclass has created it, so you can't 
expect to have any references to it.

You've told us that what you are trying to do doesn't work, but you haven't 
said why you want to do it. What is the problem you are really trying to 
solve?


From rrs at researchut.com  Tue Nov 28 04:45:28 2006
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Tue, 28 Nov 2006 15:15:28 +0530
Subject: screen output problem
In-Reply-To: <76fd5acf0611252337v2522a518jf8f92d241906d84@mail.gmail.com>
References: <1164497246.626735.254050@h54g2000cwb.googlegroups.com>
	<76fd5acf0611252337v2522a518jf8f92d241906d84@mail.gmail.com>
Message-ID: <200611281515.33327.rrs@researchut.com>

On Sunday 26 November 2006 13:07, Calvin Spealman wrote:
> Take a look at this:
> http://cheeseshop.python.org/pypi/progressbar

Hi,

Sorry for being a little late in replying.

The progressbar implementation is excellent but it has the same problems that 
the current progressbar implementation I use, has.

In the above mentioned progressbar implementation also, the progressbar status 
is overwritten if you're using multiple threads.

If your application is threaded, and multiple threads are downloading multiple 
files, you get a progressbar which is overwritten by all the 3 threads.

I had brought this issue some time back too.
Dennis Lee Bieber had a solution which looked better but not very much. His 
implementation had os.system(clear/cls) being called (to update the progress) 
which made the screen flicker if your network latency was low (especially in 
cases where the data is indirectly being downloaded from a Proxy or a product 
like NetApp's Netcache).

If there's a way to print multiple lines of text withouth the newline ("\n") 
character, we can then use carriage return ("\r") and implement a proper 
progressbar with a bar for each separate progress action.

Thanks,
Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is 
research."
"The great are those who achieve the impossible, the petty are those who 
cannot - rrs"
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From luismgz at gmail.com  Wed Nov 29 11:51:49 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 29 Nov 2006 08:51:49 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <1164817535.636391.294310@n67g2000cwd.googlegroups.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<12mragv4f1jhfb4@corp.supernews.com>
	<1164817535.636391.294310@n67g2000cwd.googlegroups.com>
Message-ID: <1164819109.332130.120540@l12g2000cwl.googlegroups.com>


Leandro Ardissone wrote:
> great, thanks
>
> And how I can compare this "<type 'str'>" output ?
> I want to decide what to do if the var is an string and what to do if
> not..
>
> Tried with:
> if type(artistList) == "<type 'list'>":
>
> and
> if type(artistList) == "list":
>
> but nothing..


You shouldn't enclose "list" inside quotes.
This is the correct way:

if type(artistList) == list:
    do something...

or as someone suggested:

if isinstance(l, list):
	do something...


hope this helps.
Luis



From fredrik at pythonware.com  Tue Nov 14 09:07:38 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 15:07:38 +0100
Subject: __init__.py
References: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com><ejc8vi$sip$1@sea.gmane.org><f4cc03640611140340q22d7f3e6pb9092148fa890347@mail.gmail.com><ejcco4$ahb$1@sea.gmane.org>
	<f4cc03640611140507n59840fd4q9d46abb2d95e51f@mail.gmail.com>
Message-ID: <ejcija$v5$1@sea.gmane.org>

"km" wrote:

> wow ! i tried it and it works like charm!
> could access  variables  declared at root module dir  in submodules.
> also i would like to know if i can have an abstract class declared in
> __init__.py  with common variables ?

you don't really need our permission to try things out, you know ;-)

</F> 





From massi_srb at msn.com  Wed Nov  8 04:09:41 2006
From: massi_srb at msn.com (Massi)
Date: 8 Nov 2006 01:09:41 -0800
Subject: Cactching Stdout
Message-ID: <1162976981.747479.226680@m7g2000cwm.googlegroups.com>

Hi everyone! I'm writing a python script which uses a C-written dll. I
call the functions in the dll using ctypes, but I don't know how to
catch the output of the "printf" which the C functions use. In fact I
don't even know if it is possible! I've heard something about PIPE and
popen...is this what I need? How can I use them? It is very important
for me that I could take the output in real-time.
Thanks for the help!
Massi



From e.frerich at nord-com.net  Mon Nov 13 12:07:26 2006
From: e.frerich at nord-com.net (Egon Frerich)
Date: Mon, 13 Nov 2006 18:07:26 +0100
Subject: Python development time is faster.
In-Reply-To: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <4558A64E.90700@nord-com.net>

Chris Brat schrieb:
> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
>
> Does anyone have any comments on that statement from personal
> experience?
> How is this comparison measured?
>
>
> Thanks
> Chris
>
>   
Have a lookl at
http://wwwipd.ira.uka.de/EIR/otherwork/index.html


From aboudouvas at panafonet.gr  Wed Nov 22 09:43:29 2006
From: aboudouvas at panafonet.gr (king kikapu)
Date: 22 Nov 2006 06:43:29 -0800
Subject: Python visual IDE
In-Reply-To: <1164205868.349589.217040@k70g2000cwa.googlegroups.com>
References: <1164188410.516169.171150@f16g2000cwb.googlegroups.com>
	<1164205868.349589.217040@k70g2000cwa.googlegroups.com>
Message-ID: <1164206609.276356.165670@m73g2000cwd.googlegroups.com>


I have already downloaded and seen the trial of Komodo Professional.
Indeed it has a simple Gui Builder but one can only use TKinter on it.
No wxWidgets support and far from truly RAD, but it is the only
"integrated"
GUI builder in these IDEs...


On Nov 22, 4:31 pm, "Steve" <s... at ferg.org> wrote:
> I haven't used it but Komodo (Professional version) says it has:
>
> ActiveState GUI Builder (Komodo Professional only)
>
> Enhance your applications with GUI dialogs: Simple, Tk-based dialog
> builder with seamless round-trip integration, for Perl, Python, Ruby,
> and Tcl.



From Thomas.Ploch at gmx.net  Thu Nov 30 13:02:06 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 19:02:06 +0100
Subject: failure building python 2.5 on mac os x 10.3.9
In-Reply-To: <ekn503$1q1$1@lnx107.hrz.tu-darmstadt.de>
References: <mailman.462.1163947820.32031.python-list@python.org>
	<ekn503$1q1$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <456F1C9E.5040605@gmx.net>

Markus Rosenstihl schrieb:
> On 2006-11-19 15:50:14 +0100, Thomas Ploch <Thomas.Ploch at gmx.net> said:
> 
>> Hello,
>>
>> I followed the instructions in the Mac/README file.
>>
>> I ran ./configure --enable-framework
>>
>> But when I try to build from source with gcc 4.0.2, following happens:
>>
>>
>> [snip]
>> libtool: can't locate file for: -lSystemStubs
>> libtool: file: -lSystemStubs is not an object file (not allowed in a
>> library)
>> make: *** [Python.framework/Versions/2.5/Python] Error 1
>>
>> What does that mean?
>>
>> Thanks,
>> Thomas
> 
> I had the same problem (why do you have gcc-4.0.2?).
> 
> -lSystemStubs is in Tiger
> 
> 
> First of all, try to install the 10.4 SDK as it will keep you away of a 
> lot of linking problems and such stuff. (yes, it will install on 10.3.9 
> and since then i had no compile problems, i found this as an answer in 
> a post in the apple discussions)
> 
> Then try to compile it again after you have deleted the python source 
> tree (or "make clean").
> If that is still not working you have to edit the Makefile from Python 
> and remove the -lSystemStubs
> (i think both ways work, but i am not sure)
> 
> Make sure you have either a patched readline 5.1 or better a readline 
> 5.2. Otherwise you will get segmentation faults when you are using 
> ipython.
> 
> 
> If it is still not working,
> Good luck!
> 
> 

Thank you,
has been quite a while since I asked, almost forgot about that one.  :-)

I have been using static python for a while, because I couldn't get
around the problem. But after a while I needed the dynamic linker for
some extensions so I thought about what it could be.

I ran into the Mac OS 10.3.9 Python (the shipped one) Bug, and
remembered not having fixed it with the fixmacpython.py (or whatever
it's called) script. So I tried building python framework again, and
whoohoo, it worked. I dunno if it was that or that I updated libtool,
gettext and all that stuff, but hey, I have to admint, I don't care
anymore.  :-)

But it's nice to know that the Tiger Dev Tools run on Panther as well.

Thomas




From Jeff.Demel at JavelinDirect.com  Tue Nov 14 10:22:11 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Tue, 14 Nov 2006 09:22:11 -0600
Subject: Noob | datetime question
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFB6@DMSP-MSG-EVS01.mail.pvt>

I'm having trouble finding exactly what I need by googling, so thought
I'd try to get a quick answer from the group.  This seems like something
that should be dead simple.

I need to generate a string value of a date in the format YYYYMMDD that
is 97 days in the future.  The datetime module is brand new to me, and
I'm not sure how to do this.  Can someone help me out here?

TIA

-Jeff
This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From nslater at gmail.com  Sat Nov 25 11:13:58 2006
From: nslater at gmail.com (Noah Slater)
Date: 25 Nov 2006 08:13:58 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164156093.359433.315790@e3g2000cwe.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
Message-ID: <1164471238.033790.243890@14g2000cws.googlegroups.com>


On Nov 22, 12:41 am, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
wrote:
> Thanks for the comments. PDF is, to some extent, a requirement. To
> preserve the entire journal as a single "entity" with a reasonably high
> production quality, there seems to be no way around it. I could not
> find a sufficiently simple way to do multi-format publishing with an
> attractive layout and good typesetting.

Which is more important to the Python comunity...

Good typesetting or good, searchable, copyable, usable information?



From steve at holdenweb.com  Mon Nov 13 04:29:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:29:35 -0600
Subject: explicit self revisited
In-Reply-To: <1163288444.893136.42030@h54g2000cwb.googlegroups.com>
References: <ej5fuv$a4a$1@online.de><ej5i3k$6l3$1@sea.gmane.org>	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
Message-ID: <ej9drm$8f2$2@sea.gmane.org>

Doug wrote:
[...]
> The explicit self is there simply because OOP was tacked onto python as
> an afterthought.

No, it was added in such a way that Python would be useful as a 
procedural as well as an OO language.

I don't know what's got into me.

can't-normally-say-boo-to-a-goose-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From mike at hobbshouse.org  Mon Nov 13 13:16:00 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 12:16:00 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <slrnelbab6.dc5.apardon@rcpc42.vub.ac.be>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<ej2gp9$1qc$1@sea.gmane.org>	<mailman.2055.1163186198.11739.python-list@python.org>	<pan.2006.11.11.02.06.05.727087@REMOVE.THIS.cybersource.com.au>
	<slrnelbab6.dc5.apardon@rcpc42.vub.ac.be>
Message-ID: <4558B660.50408@hobbshouse.org>

Antoon Pardon wrote:
> On 2006-11-11, Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>   
>> On Fri, 10 Nov 2006 13:16:32 -0600, Michael Hobbs wrote:
>>
>>     
>>> Yeah, okay, I didn't read through the details of the PEP. I picked a bad 
>>> example to illustrate a point that is still true. The FAQ also tries to 
>>> argue that it's a Good Thing that join() is a string method, not a list 
>>> method. It also tries to argue that there's a good reason that lists are 
>>> different than tuples. I don't think it would surprising that many 
>>> Python developers don't really buy those arguments either.
>>>       
>> Well, as far as I'm concerned, you've just blown your credibility
>> completely out the water now. 
>>
>> Yes, I'm aware that there are many Python programmers who don't get join()
>> or lists/tuples, but I'm constantly surprised by that fact. At the risk of
>> starting another argument, to my mind that's like discovering that there
>> are professional butchers who don't think that using a sharp knife is a
>> good idea.
>>     
>
> Well I would think that if you would find out that many professional
> butchers would think so, you might consider the idea has some merrit.
>   

As they say, insanity is nothing more than having a minority opinion. As 
more people take the opposite side, who's left being the crazy one? ;-)

- Mike



From vasudevram at gmail.com  Fri Nov 24 05:15:26 2006
From: vasudevram at gmail.com (vasudevram)
Date: 24 Nov 2006 02:15:26 -0800
Subject: Python work in UK
In-Reply-To: <4565f638$0$2447$db0fefd9@news.zen.co.uk>
References: <4565f638$0$2447$db0fefd9@news.zen.co.uk>
Message-ID: <1164363325.971011.322330@f16g2000cwb.googlegroups.com>


Hi,

A few suggestions, you may have tried them already:

Search for UK Python jobs on major job sites like Monster, Dice, etc.
Some (like Monster) have country-specific sites, I think. I know
Monster has an India-specific site, it probably also has one for the
UK.

Have you considered the option of being a freelancer and working via
Net job sites like eLance, Guru.com, oDesk?

Also check out the Python job board at
http://www.python.org/community/jobs/

HTH
Vasudev
-----------------------------------------------------------
Site: http://www.dancingbison.com
Blogs:
http://jugad.livejournal.com
http://dancingbison.blogspot.com
Open source project:
http://www.dancingbison.com/products.html
-----------------------------------------------------------

Will McGugan wrote:
> Hi,
>
> I'd love to work in Python, for the sake of my blood pressure, but there
> doesnt seem to be that many jobs that look for Python as the main skill.
> I use Python at work from time to time, and occasionaly get to spend
> several days on a Python project but the majority of the time I use C++.
> How can I make that leap to working with Python? There doesn't seem to
> be many UK positions on the jobs section of Python.org or the usual jobs
> sites. Any recommended jobs sites or tips? (I have googled)
>
> In the off chance that a potential empolyer is reading this, I'm looking
> for something in web development, applications, graphics or other
> interesting field. Here is a copy of my CV.
>
> http://www.willmcgugan.com/cvwillmcgugan.pdf
> 
> Regards,
> 
> Will McGugan
> -- 
> http://www.willmcgugan.com



From sjmachin at lexicon.net  Mon Nov  6 18:47:21 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 15:47:21 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <mailman.1825.1162856290.11739.python-list@python.org>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<mailman.1818.1162845307.11739.python-list@python.org>
	<1162846564.782883.259110@h54g2000cwb.googlegroups.com>
	<454fa3c9$0$13767$4fafbaef@reader3.news.tin.it>
	<1162854476.903789.5550@b28g2000cwb.googlegroups.com>
	<eiogps$c1d$1@sea.gmane.org>
	<mailman.1825.1162856290.11739.python-list@python.org>
Message-ID: <1162856841.319591.73530@f16g2000cwb.googlegroups.com>


Gabriel Genellina wrote:
> At Monday 6/11/2006 20:34, Robert Kern wrote:
>
> >John Machin wrote:
> > > Indeed yourself. Have you ever considered reading posts in
> > > chronological order, or reading all posts in a thread?
> >
> >That presumes that messages arrive in chronological order and
> >transmissions are
> >instantaneous. Neither are true.
>
> Sometimes I even got the replies *before* the original post comes.

What is in question is the likelihood that message B can appear before
message A, when both emanate from the same source, and B was sent about
7 minutes after A.



From guettli.usenet at thomas-guettler.de  Fri Nov 24 10:36:48 2006
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 24 Nov 2006 15:36:48 GMT
Subject: Pimping the 'cgi' module
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<mailman.670.1164364120.32031.python-list@python.org>
	<ek6ncq$7pp$1@news.albasani.net>
	<mailman.674.1164373472.32031.python-list@python.org>
Message-ID: <4sohsgFvqh5uU1@mid.individual.net>

Christoph Haas wrote:
...
> Oh, yeah. I just joined the Web SIG and found out that WSGI
> seems the way
> to go.
...

I don't want a standard, i want *one* implementation. In the
Java world, there are a lot of standards and N*standards 
implementations. In the end you have the opposite of what
a standard should give you: Bad interopability.

One implemantation (which is in the standard library) would
be the right coice. But what could I do? (I am not a python
core developer)? I could only create a new web framework.
And that's why there are so many.

I hope Guido (or someone else who can do this) will decide to choose one
soon. 


 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From jln at iafrica.com  Fri Nov 24 00:33:18 2006
From: jln at iafrica.com (Jacques Naude)
Date: Fri, 24 Nov 2006 07:33:18 +0200
Subject: The Python Papers Edition One
In-Reply-To: <1164285328.330478.95620@l12g2000cwl.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164285328.330478.95620@l12g2000cwl.googlegroups.com>
Message-ID: <ek606n$578$1@ctb-nnrp2.saix.net>

kilnhead wrote:
> I for one like the pdf format. Nothing irks me more than help files in
> multipage HTML. I want a document I can easily download and save.
> Thanks for your efforts.
> 
> 
> tleeuwenburg at gmail.com wrote:
>> Greetings all,
>>
>> Some of you may have noticed the launch of the Python Journal a while
>> back. Due to artistic differences, the journal has now been re-launched
>> as The Python Papers. It is available under a Creative Commons License,
>> something we felt was appropriate given its nature. Many here commented
>> that this was important to them, and it is important to us also.
>>
>> For a fuller description of what we hope the journal to be, I re-create
>> my inaugural blog posting at the end of this email, or it can be found
>> online here: http://pythonpapers.cgpublisher.com/diary
>>
>> Some of you had a number of specific points to raise, which I can now
>> answer properly since launching under our own banner.
>>
>> 1.) It takes too many clicks to download.
>> A) We know, but it's like that to save our server. We will be
>> publishing to a number of online archives, back-issues may be
>> back-linkable from those.
>>
>> 2.) Is it free?
>> A) Yes, as in beer and as in freedom. Creative Commons 2.5
>> Noncommercial, attribution, share-alike.
>>
>> 3.) Can I have an HTML version?
>> A) No, we like it pretty.
>>
>> 4.) Why not try (insert favourite thing here)
>> A) We will. Thanks for the fish.
>>
>> " Volume 1, Edition 1 makes history
>>
>> Welcome to The Python Papers. This journal, small though it is,
>> represents the careful efforts of a small group of Python enthusiasts
>> who are keen to form a better community in which developers may work.
>>
>> As Editor-In-Chief, my role is manifold, but my goals are to improve
>> the level of connectedness of Python developers, and in so doing
>> improve my own developer experience.
>>
>> The entire editorial board has put time into making this publication
>> something which will hopefully lead to a buildup of momentum, fuelled
>> by the enthusiastic involvement of others who find Python as exciting
>> as we do.
>>
>> The current issue contains one academic, peer-reviewed article, one
>> industry article, and a list of events coming up in Melbourne,
>> Australia. We would like to expand this list significantly. We offer
>> our services in organising, collating and reviewing submitted content
>> such that Python developers around the world may participate in the
>> creation of something bigger than all of us, for the benefit of all of
>> us. It may be a small journal, a little thing really, but all are
>> welcome, and we look forward to getting to know our readers through the
>> written word.
>>
>> Please download the first edition, and consider both what it is and
>> what it might be.
>>
>> For those of you looking to publish an academic paper as a part of
>> coursework or for interest's sake alone, we can offer a formal review
>> process which will meet those guidelines while preserving the goals of
>> freedom of information and community spirit.
>>
>> Those who are using Python in their work may like to consider using the
>> journal as a means of expressing successes or frustrations with either
>> the language itself or specific applications. We may be able to offer
>> code reviews and style guides, and would be happy to hear about and
>> help propagate news of what is happening so that everyone can take an
>> interest.
>>
>> For those who would like a reliable source of information, The Python
>> Papers presents a unique and current view into the state of Python at
>> large.
>>
>> To all of you, welcome!
>> Cheers,
>> -Tennessee (Editor-In-Chief)"
> 
As do I. Also, it seems quite in line with how the academic world 
approaches their publications.

Looks damn good!


From no-spam at no-spam-no-spam.invalid  Mon Nov 27 13:51:22 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Mon, 27 Nov 2006 19:51:22 +0100
Subject: can't get cgi values
In-Reply-To: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
References: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>
Message-ID: <ekfc3b$pe1$1@news.albasani.net>

ronrsr wrote:
> I'm having trouble extracting cgi parameters in my code - this is a web
> application, so I only know the line that's causing the problem.

if exceptions try "import cgitb; cgitb.enable()" to get a traces directly in HTML for testing; otherwise read the server log (logs of httpd etc.) for traces

> 
> here's the info I know:
> 
> form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
> MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
> 'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
> April 2002\\r\\n       \\r\\n       \r\n       '),
> MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
> small number of agri-businesses, many of them large corps. Yet these
> subsidies are 6 times what rich countries provide in foreign aid to a
> developing world that includes 5 billion people.\\r\\n       \r\n
> '), MiniFieldStorage('updatebutton', 'Update')])
> form.has_key("citation") = True
> 
> 
> 
>      fileHandle.write("here aer the haskeys");
>      fileHandle.write( str(form.has_key("citation")))
>     /* returns TRUE */
> 
>      temp = str(form("citation").value)
>          /* python stops here,
> 
>             form("citation appears to be undefined */
> 
> 
> 
>      print (str(form("citation").value))
>   /* this doesn't work, either */
> 


try "form['citation']"

why the Python cgi module and the documentation is a horror, read: <ek6ncq$7pp$1 at news.albasani.net>


Robert

> 
> 
>      if form.has_key("keywords"):                                  /*
> neither does this */
>          keywords = str(form["keywords"].value)
>      else:
>           keywords = "k"
> 
>   
> 
> 
> 
> 
> any ideas on what the problem is? 
> 
> thank you so much. 
> 
> -rsr-
> 


From nick at craig-wood.com  Wed Nov 15 09:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 15 Nov 2006 08:30:04 -0600
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>
	<12lj35aqa9drd8a@corp.supernews.com>
	<slrnelj996.paq.nick@irishsea.home.craig-wood.com>
	<12llun7ipasjs16@corp.supernews.com>
Message-ID: <slrnelm6gq.qml.nick@irishsea.home.craig-wood.com>

Adrian Casey <adrian.casey at internode.on.net> wrote:
>  I'm running Kubuntu 06-06 with python 2.4.3 and the above code runs forever
>  at 100% cpu utilization.

Interesting... I wonder if that is a fixed bug.

On Debian/etch with python-pexpect 2.1-1 I get

    Python 2.4.4c0 (#2, Jul 30 2006, 15:43:58) 
    [GCC 4.1.2 20060715 (prerelease) (Debian 4.1.1-9)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import os, pexpect, threading
    >>> def runyes():
    ...     print "Running yes command..."
    ...     pexpect.run('yes', timeout=5)
    ... 
    >>> t = threading.Thread(target=runyes)
    >>> t.start()
    >>> Running yes command...
    t.join()
    >>> 
   

Wheras on Ubuntu/dapper with python-pexpect 0.999-5ubuntu2 I get

    Python 2.4.3 (#2, Apr 27 2006, 14:43:58) 
    [GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import os, pexpect, threading
    >>> def runyes():
    ...     print "Running yes command..."
    ...     pexpect.run('yes', timeout=5)
    ... 
    >>> t = threading.Thread(target=runyes)
    >>> t.start()
    >>> Running yes command...
    t.join()
    [never returns]

I'd guess at differences between the pexpect versions.  You could try
the pexpect from debian/testing easily enough I expect.

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


From fredrik at pythonware.com  Wed Nov 29 01:58:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 07:58:50 +0100
Subject: Python program that validates an url against w3c markup validator
In-Reply-To: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
Message-ID: <ekjb38$t66$1@sea.gmane.org>

yaru22 wrote:

> I'd like to create a program that validates bunch of urls against the
> w3c markup validator (http://validator.w3.org/) and store the result in
> a file.
> 
> Since I don't know network programming, I have no idea how to start
> coding this program.
> 
> I was looking at the python library and thought urllib or urllib2 may
> be used to make this program work.
> 
> But I don't know how to send my urls to the w3c validator and get the
> result.

this should get you going, I think:

 >>> import urllib
 >>> uri = "http://www.python.org"
 >>> f = urllib.urlopen("http://validator.w3.org/check?uri=" + uri)
 >>> print f.headers
Date: Wed, 29 Nov 2006 06:52:33 GMT
Server: Apache/2.0.54 (Debian GNU/Linux) mod_perl/1.999.21 Perl/v5.8.4
Content-Language: en
X-W3C-Validator-Recursion: 1
X-W3C-Validator-Status: Valid
X-W3C-Validator-Errors: 0
Connection: close
Content-Type: text/html; charset=utf-8
 >>> print f.headers["x-w3c-validator-status")
Valid

 >>> uri = "http://www.cnn.com"
 >>> f = urllib.urlopen("http://validator.w3.org/check?uri=" + uri)
 >>> print f.headers["x-w3c-validator-status"]
Invalid
 >>> print f.headers["x-w3c-validator-errors"]
39

</F>



From cjames at callone.net  Tue Nov 21 09:00:03 2006
From: cjames at callone.net (c james)
Date: Tue, 21 Nov 2006 08:00:03 -0600
Subject: Why is class decorator on method loosing self?
Message-ID: <ejv0p4$gqp$2@sea.gmane.org>

I want to use the LRU decorator posted at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498110
on a class method.  However, it complains about missing arguments. The 
missing argument is `self`.  I could use @classmethod but what I really 
need is an instance method.  I don't see how and was hoping someone else 
might know the way.

Here is an example with taking that recipe as lru.py

import lru

class Foo(object):
     def banner(self):
         print "Testing method"

     @memoize(3)
     def min_max(self, sequence):
         self.banner()
         return min(sequence), max(sequence)

foo = Foo()
print foo.min_max([9,7,5,3,1])


Traceback (most recent call last):
...
   File "lru.py", line 48, in __call__
     value = self.func(*args, **kwargs)
TypeError: min_max() takes exactly 2 arguments (1 given)



From vyzasatya at gmail.com  Fri Nov 10 14:50:23 2006
From: vyzasatya at gmail.com (Vyz)
Date: 10 Nov 2006 11:50:23 -0800
Subject: PDF to text script
Message-ID: <1163188222.330683.9160@e3g2000cwe.googlegroups.com>

I am looking for a PDF to text script. I am working with multibyte
language PDFs on Windows Xp. I need to batch convert them to text and
feed into an encoding converter program

Thanks for any help in this regard



From nulla.epistola at web.de  Mon Nov 20 08:51:35 2006
From: nulla.epistola at web.de (Hertha Steck)
Date: Mon, 20 Nov 2006 14:51:35 +0100
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
	<pan.2006.11.19.16.59.35.983108@web.de>
	<1163975565.887782.93050@h48g2000cwc.googlegroups.com>
Message-ID: <pan.2006.11.20.13.51.29.845474@web.de>

Am Sun, 19 Nov 2006 14:32:45 -0800 schrieb John (Z R) L:

> Thanks for the replies so far. I do exactly what that website says, and
> on the old computer (Windows 98), I click run module and nothing
> happens. No text gets displayed on my IDLE. It contained that firewall
> message at the top.
> 
> Back on the new computer, I deleted all of my .py files and I could go
> back to the Python IDLE (GUI) again.
> 

First of all: did you try to run the script using PythonWin and did you
run it in a command window? What happened? What error messages did you
get, if any?

The script itself doesn't contain any errors. And in my IDLE it behaves
perfectly well.

And please, if you answer, keep the text you are answering. This is no web
forum where you can see several postings at once.



From cvanarsdall at mvista.com  Tue Nov  7 16:36:16 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Tue, 07 Nov 2006 13:36:16 -0800
Subject: Pyro stability
In-Reply-To: <1162895554.549926.49280@k70g2000cwa.googlegroups.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<454dd84b$0$328$e4fe514c@news.xs4all.nl>	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>	<mailman.1827.1162864080.11739.python-list@python.org>	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<1162895554.549926.49280@k70g2000cwa.googlegroups.com>
Message-ID: <4550FC50.5040204@mvista.com>

Paul Boddie wrote:
> Beliavsky wrote:
>   
>> Carl J. Van Arsdall wrote:
>>     
>
> [Enthusiasm for Pyro, not for those with sensitivity to rude words]
>
>   
>> You should watch your language in a forum with thousands of readers.
>>     
I think you should find better things to complain about and not worry 
about language usage so much.

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From no-spam at no-spam-no-spam.invalid  Thu Nov 16 04:40:18 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 16 Nov 2006 10:40:18 +0100
Subject: Data structure for ordered sequence
In-Reply-To: <1163416085.099968.185390@b28g2000cwb.googlegroups.com>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
	<mailman.50.1163412604.32031.python-list@python.org>
	<1163416085.099968.185390@b28g2000cwb.googlegroups.com>
Message-ID: <ejhbm4$i30$1@news.albasani.net>

jm.suresh at no.spam.gmail.com wrote:
> Fredrik Lundh wrote:
>> jm.suresh at no.spam.gmail.com wrote:
>>
>>>  I am looking for a data structure to hold rectangles in a 2d space.
>>> Please point me to any module which does these operations:
>>>  Insert a rectangle into a particular co-ordinate.
>>>  Get the rectangle/s right/left/above/below side to a particular
>>> rectangle.
>>>  Get all the rectangles within a box
>>>  Delete a particular rectangle.
>> how many rectangles do you plan to store in this structure?
>>
>> </F>
> 
> Around 150 max
> 

And seeking/change frequency? fix dimensions? Probably for a GUI/mouse thing. 
=>Not worth worring about a 2D-tree structure. A Python list ? :-) Insert/change coordinates at no costs and seek the list with a 3-liner and you are quite fast :-)  Any sophisticated tree fumbling will cost more.
Or at max use a 1D-btree thing or so for x0,x1 or a fix 16x16 array ..

-robert


From ronrsr at gmail.com  Mon Nov 27 13:28:54 2006
From: ronrsr at gmail.com (ronrsr)
Date: 27 Nov 2006 10:28:54 -0800
Subject: can't get cgi values
Message-ID: <1164652134.826957.80980@h54g2000cwb.googlegroups.com>

I'm having trouble extracting cgi parameters in my code - this is a web
application, so I only know the line that's causing the problem.

here's the info I know:

form = FieldStorage(None, None, [MiniFieldStorage('zid', '17'),
MiniFieldStorage('keywords', 'aAUA'), MiniFieldStorage('keywords',
'aBOS'), MiniFieldStorage('citation', '<i>The Earth Times Monthly</i>,
April 2002\\r\\n       \\r\\n       \r\n       '),
MiniFieldStorage('quotation', 'Farm support goes mainly to a relatively
small number of agri-businesses, many of them large corps. Yet these
subsidies are 6 times what rich countries provide in foreign aid to a
developing world that includes 5 billion people.\\r\\n       \r\n
'), MiniFieldStorage('updatebutton', 'Update')])
form.has_key("citation") = True



     fileHandle.write("here aer the haskeys");
     fileHandle.write( str(form.has_key("citation")))
    /* returns TRUE */

     temp = str(form("citation").value)
         /* python stops here,

            form("citation appears to be undefined */



     print (str(form("citation").value))
  /* this doesn't work, either */




     if form.has_key("keywords"):                                  /*
neither does this */
         keywords = str(form["keywords"].value)
     else:
          keywords = "k"

  




any ideas on what the problem is? 

thank you so much. 

-rsr-



From steve at holdenweb.com  Thu Nov  2 12:59:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 17:59:48 +0000
Subject: creating new objects with references to them
In-Reply-To: <1162486298.863881.261790@h54g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>
	<1162486298.863881.261790@h54g2000cwb.googlegroups.com>
Message-ID: <eidbkf$i72$2@sea.gmane.org>

JohnJSal wrote:
> JohnJSal wrote:
> 
> 
>>Hope that makes sense. It seems like such a common task.
> 
> 
> Ok, I'm thinking about the suggestion to make a list, but I'm still
> confused. Even with a list, how do I access each instance. Would I have
> to do it by index? I assume I'd do something like this:
> 
> self.records = []    # list for storing instances
> 
> Then when "New Record" is clicked:
> 
> def OnNewRecord(self, event):
>     self.records.append(Researchers())
> 
> But now what? There is still no reference to that instance? The only
> thing I can think of is that each record will be a tab in a wxPython
> notebook control, and each tab can be referenced by index. So whichever
> tab I'm on, I can use that index to get that particular instance in the
> list.
> 
> But this solution seems too tied to my particular implementation. How
> would you normally access these instances in the list?
> 
> Let's say there are three objects in the list. Someone fills out the
> text fields for the second one and clicks "Save". I know how to read
> all the information in the fields, but how do I then associate it with
> that second instance?
> 
> (Or I wonder if I really even need to, since upon saving, the
> information gets stored in the database immediately. Maybe I don't even
> need a Researcher class at all.)
> 
How about having a list of tuples: (record, window). Each window has to 
"know" which item it's editing.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From p.lavarre at ieee.org  Thu Nov  9 18:16:42 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 15:16:42 -0800
Subject: pack a three byte int
In-Reply-To: <1163092047.577688.140400@m73g2000cwd.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
Message-ID: <1163114202.636000.234900@m73g2000cwd.googlegroups.com>

> Not as concisely as a one-byte struct code

Help, what do you mean?

> you presumably... read... the manual ...

Did I reread the wrong parts?  I see I could define a ctypes.Structure
since 2.5, but that would be neither concise, nor since 2.3.

> when 24-bit machines become ... popular

Indeed the struct's defined recently, ~1980, were contorted to make
them easy to say in C, which makes them easy to say in Python, e.g.:

X28Read10 = 0x28
cdb = struct.pack('>BBIBHB', X28Read10, 0, skip, 0, count, 0)

But when talking the 1960's lingo I find I am actually resorting to
horrors like:

X12Inquiry = 0x12
xxs = [0] * 6
xxs[0] = X12Inquiry
xxs[4] = allocationLength
rq = ''.join([chr(xx) for xx in xxs])

Surely this is wrong?  A failure on my part to think in Python?



From kloro2006 at gmail.com  Tue Nov  7 18:44:09 2006
From: kloro2006 at gmail.com (tom arnall)
Date: Tue, 07 Nov 2006 15:44:09 -0800
Subject: object data member dumper?
References: <4550cddd$0$12104$88260bb3@free.teranews.com>
	<4550f442$0$20337$426a34cc@news.free.fr>
	<mailman.1864.1162938322.11739.python-list@python.org>
Message-ID: <45510cc9$0$12164$88260bb3@free.teranews.com>

Steve Holden wrote:

> Bruno Desthuilliers wrote:
>> tom arnall a ?crit :
>> 
>>>does anyone know of a utility to do a recursive dump of object data
>>>members?
>>>
>> 
>> 
>> What are "object data members" ? (hint: in Python, everything is an
>> object - even functions and methods).
>> 
>> What is your real use case ?
> 
> Basically it sounds like the OP wants to see the attribute values for an
> object (and those objects' attribute values, ...). Presumably the
> recursive descent could be stopped at the built-in types.

Yes, exactly. But what is 'OP'?

> 
> I'm not familiar with any such thing. 

I'm amazed that there is no way to easily look at the fundamental data
structures of a python program. I'm new to python - is there something I
don't know about the territory in this regard?

>The code of the standard library's
> pprint module might be a good place to start 

I played around with this but it seems more targetted to looking at python
objects as opposed to user-defined.

>(and the suggested
> functionality might make a nice addition if we could work out exactly
> what the requirement was).

I would be glad if people would comment on my example as a step in this
direction.

tom arnall
north spit, ca
usa


-- 
Posted via a free Usenet account from http://www.teranews.com



From shejo284 at gmail.com  Fri Nov 17 09:14:30 2006
From: shejo284 at gmail.com (Sheldon)
Date: 17 Nov 2006 06:14:30 -0800
Subject: function for allocating memory for string array
Message-ID: <1163772870.781423.161550@k70g2000cwa.googlegroups.com>

Hi,

Can someone tell me how to remove the conflicts here ?

#include <stdlib>
static char*** Memory2DStr(int R, int C);
static void MemoryFreeStr(int C, char*** array);

void main() {
unsigned char ***arr_scenes=NULL;
int R = 15;
int C = 15;

arr_scenes = Memory2DStr(nscenes,2);
MemoryFreeStr(2,arr_scenes);
}
static
char*** Memory2DStr(int R, int C) {
  char*** array;
  int i;
  array = calloc(C,sizeof(char **));
  if(array == NULL) {
    fprintf(stderr, "Failed to allocate memory\n");
    exit(EXIT_FAILURE);
  }
  for (i = 0; i < C; i++) {
    array[i] = calloc(R,sizeof(char*));
    if(array == NULL) { // Memory for the Col
      fprintf(stderr, "Failed to allocate memory\n");
      exit(EXIT_FAILURE);
    }
  }
  return array;
}
static
void MemoryFreeStr(int Col, char*** array) {
  int i;
  for (i = 0; i < 15; i++) {
    free((*array)[i]);
  }
  free(*array);
}


Thanks,
Sheldon



From no-spam at no-spam-no-spam.invalid  Wed Nov 22 15:41:39 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 22 Nov 2006 21:41:39 +0100
Subject: X class missing in Python :-) - Re: What's going on here?
In-Reply-To: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <ek2cm5$h2$1@news.albasani.net>

Dale Strickland-Clark wrote:
> Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
> [GCC 4.1.0 (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> a = object()
>>>> a
> <object object at 0xb7bbd438>
>>>> a.spam = 1
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'object' object has no attribute 'spam'
>>>> class b(object):
> ...    pass
> ...
>>>> a = b()
>>>> a
> <__main__.b object at 0xb7b4dcac>
>>>> a.spam = 1
>>>>
> 
> What is subclassing adding to the class here? Why can't I assign to
> attributes of an instance of object?


Python sooooo dynamic, but it lacks a (builtin) X-class ready for ad-hoc usage just like dict() :-)
I have in almost every app/toolcore-module this one:

------

class X(object):
    def __init__(self,_d={},**kwargs):
        kwargs.update(_d)
        self.__dict__=kwargs
class Y(X):
    def __repr__(self):
        return '<Y:%s>'%self.__dict__

------

x=X(spam=1)

Maybe X should be renamed to __builtin__.Object ...


Robert


From tleeuwenburg at gmail.com  Thu Nov 30 23:23:50 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 30 Nov 2006 20:23:50 -0800
Subject: v2.3, 2.4, and 2.5's GUI is slow for me
In-Reply-To: <mailman.907.1164934903.32031.python-list@python.org>
References: <7630074.post@talk.nabble.com>
	<mailman.907.1164934903.32031.python-list@python.org>
Message-ID: <1164947030.816016.145720@n67g2000cwd.googlegroups.com>

It's not slow for me. It's not like Python's inherently slow.

Try turning off your virus scanner (temporarily and while not doing
anything dangerous, of course).

Cheers,
-T


g4rlik wrote:
> No one can help?  This is seriously bugging me to no end.
>
> g4rlik wrote:
> >
> > I've been asking all over the place, namely different forums.  I even
> > e-mailed help at python.org about my problem, but they couldn't assist me too
> > much.
> >
> > My problem is..the GUI for versions 2.3, 2.4, and 2.5 of Python run very
> > sluggishly.  When I type in them or move them around my desktop, it's very
> > slow.  I have figured out that this is because of the subprocesses
> > running.
> >
> > To cope with this problem, I created an idle.txt file, and added this to
> > the first line of it:
> >
> > c:\python25\python c:\python25\Lib\idlelib\idle.py -n
> >
> > After that I saved the extension to .bat and now when I run that file, the
> > Python GUI opens without any subprocesses running and I have no problem.
> > However, I'd still really like to know how I could fix this problem even
> > more.  I honestly don't understand why the GUI is so sluggish for me.  The
> > GUIs for Python version 2.2 and below run fine for me.  My system specs
> > are as follows:
> >
> > Windows XP Home Edition
> > AMD Athlon XP 2800
> > nVidia 6800GT
> > 1 gig of RAM
> >
> > If anyone else could help, that would be great.
> >
> >
> > ***EDIT***
> >
> > When starting up Python's v2.5 GUI, I noticed this message.
> >
> > "Personal firewall software may warn about the connection IDLE
> >     makes to its subprocess using this computer's internal loopback
> >     interface.  This connection is not visible on any external
> >     interface and no data is sent to or received from the Internet."
> >
> > Maybe a firewall is interfering somehow?  I'm behind a hardware firewall
> > with my Linksys router.
> >
>
> --
> View this message in context: http://www.nabble.com/v2.3%2C-2.4%2C-and-2.5%27s-GUI-is-slow-for-me-tf2735011.html#a7631564
> Sent from the Python - python-list mailing list archive at Nabble.com.



From no-spam at no-spam-no-spam.invalid  Wed Nov 29 09:52:09 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 29 Nov 2006 15:52:09 +0100
Subject: Detecting recursion loops
Message-ID: <ekk6qu$po0$1@news.albasani.net>

My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?

Robert


From vinjvinj at gmail.com  Thu Nov 16 13:07:23 2006
From: vinjvinj at gmail.com (vj)
Date: 16 Nov 2006 10:07:23 -0800
Subject: Has anyone generated Open Office Calc XML files from python
In-Reply-To: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
References: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>
Message-ID: <1163700443.697061.47130@e3g2000cwe.googlegroups.com>

I just found something in perl:

http://tools.openoffice.org/profiling/pod/LogFile/XML.html

Will try and reverse engineer this, unless something like this exists
in python. 

VJ



From gagsl-py at yahoo.com.ar  Sat Nov 18 18:03:10 2006
From: gagsl-py at yahoo.com.ar (gagsl-py at yahoo.com.ar)
Date: 18 Nov 2006 15:03:10 -0800
Subject: Overwrite only one function with property()
In-Reply-To: <mailman.441.1163887594.32031.python-list@python.org>
References: <mailman.441.1163887594.32031.python-list@python.org>
Message-ID: <1163890990.319336.320620@j44g2000cwa.googlegroups.com>

On 18 nov, 19:06, "Kai Kuehne" <kai.kue... at gmail.com> wrote:

> It is possible to overwrite only one function with the property-function?
>
> x = property(getx, setx, delx, 'doc')
>
> I just want to overwrite setx, but when I set the others to None,
> I can't read and del the member. Any ideas or is this not possible?

Do you want to override the setter of an existing property, in a
derived class?



From humitos at gmail.com  Tue Nov 21 10:31:13 2006
From: humitos at gmail.com (Manuel Kaufmann)
Date: Tue, 21 Nov 2006 12:31:13 -0300
Subject: move up a level
In-Reply-To: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
References: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
Message-ID: <200611211231.13882.humitos@gmail.com>

El Martes, 21 de Noviembre de 2006 03:07, rplobue at yahoo.com escribi?:
> alright, noob question: i want to open a file in a directory above the
> current one i'm in.  I'm trying to use myfile =
> open('../thefileiwant.txt', 'r')  but the ../ doesn't work.  How do i
> do it?

Hello, I proved your doubt in my PC and it works fine. This is the example:

Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.getcwd()
'/home/manuel/descargas'
>>> file = open('../proof.py')
>>> print file.read()
import sys
if __name__ == '__main__':
        print 'manuel'

>>>

-- 
Kaufmann Manuel


From rupole at hotmail.com  Fri Nov 10 06:06:32 2006
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 10 Nov 2006 06:06:32 -0500
Subject: win32com/python different behavour.
References: <1163064938.384105.145290@m73g2000cwd.googlegroups.com>
Message-ID: <1163157007_3631@sp6iad.superfeed.net>

bli wrote:
>I have been developing an application driving a device through COM. I
> used win32com (brilliant )
> and was at a fairly advanced stage being able to access the functions
> of the device and access/ retrieve its data.
> A week or two ago I did some overdue upgrading to all the components of
> the application.win32com, python to 2.4.4 and wxpy to latest.
> Then the problem began (I think!).
> My app still accesses the device and some functions still perform as
> expected. Howeve some important data retrieval functions now behave
> very differently.
> Initially a tuple was returned, which was made into a list. This tuple
> returned (true,'1234xyz'), the first element was the success or failure
> of the operation, the second the required data.
> Now all these functions return only the boolean, True or False.
> I cannot seem to produce the tuple that initially worked extremely
> well.
>
> eg. initially
>
> xx.GetMACAddr(param1,param2)  <-- params as per 'intellisense' would
> return
> (True,'123xyz')
>
> now
> xx.GetMACAddr(param1,param2)  returns
> True    (type boolean)
>
> I have exhausted my relative inexperience on this one.
> Any Ideas  BTW VB extracts the data just fine , so I dont think that
> the Device or firmware is at fault here.
> Python has been great so far, I trust this problem is an oversight on
> my part.
>
> Thanks in keen anticipation for any ideas to get over this one!!
>
> I am in the middle of returning to Python 2.4.3 just to be sure that
> this is not the issue.

Try running makepy on the object's typelib.  It may have been done
for your previous version of python.  Occasionally this can cause a
change in the number of return values if the library is doing something
non-standard.

          Roger




From bugracakir at gmail.com  Sun Nov 12 13:10:16 2006
From: bugracakir at gmail.com (Bugra Cakir)
Date: Sun, 12 Nov 2006 20:10:16 +0200
Subject: MemoryError
Message-ID: <5a00f6240611121010i63c16d95tf9fc743edcb58ebf@mail.gmail.com>

Hi,

Within a Python program how can we avoid getting "MemoryError" problem ?
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From mike at hobbshouse.org  Mon Nov 13 17:25:06 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 16:25:06 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejaqdh$q8v$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>	<4558D443.1030802@hobbshouse.org>	<ejakm2$44p$1@sea.gmane.org>	<4558DBEF.8010409@hobbshouse.org>
	<ejaqdh$q8v$1@sea.gmane.org>
Message-ID: <4558F0C2.4060004@hobbshouse.org>

Robert Kern wrote:
> Michael Hobbs wrote:
>   
>> True enough. Although, I have to ask how many times you define a new 
>> function only to have Python spit a syntax error out at you saying that 
>> you forgot a colon. It happens to me all the time. (Usually after an 
>> "else") If you'd never notice that the colon was missing if the compiler 
>> didn't point it out, is it really that readable? For me, I tend to get 
>> annoyed at language "features" that I'm constantly tripping over.
>>     
>
> Never.
>   

Now I see where we disagree. Also gaging from everyone else's reaction, 
I must have some strange no-colon circuitry wired into my brain.

I guess that's it then,
- Mike




From Leo.Kislov at gmail.com  Tue Nov 28 06:09:18 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 28 Nov 2006 03:09:18 -0800
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<1164704315.847955.81950@45g2000cws.googlegroups.com>
Message-ID: <1164711636.748199.172710@h54g2000cwb.googlegroups.com>

HYRY wrote:
> Peter Otten wrote:
> > HYRY wrote:
> >
> > > I want to join two mono wave file to a stereo wave file by only using
> > > the default python module.
> > > Here is my program, but it is much slower than the C version, so how
> > > can I increase the speed?
> > > I think the problem is at line #1, #2, #3.
> >
> > > oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
> >
> > ITEMSIZE = 2
> > size = ITEMSIZE*(len(larray) + len(rarray))
> > oarray = array.array("h")
> > oarray.fromstring("\0" * size)
> >
> > may be a bit faster.
> >
> > Peter
>
> Thank you very much, that is just what I want.

Even faster: oarray = larray + rarray

C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
=array('h'); a.fromstring('\0'*(2*N))"
100 loops, best of 3: 9.57 msec per loop

C:\Python25>python -m timeit -s"from array import array; N = 10**6; b =
array('h', [0])*(N/2); c = b[:]" "a = b + c"
100 loops, best of 3: 5.7 msec per loop

  -- Leo



From comechao at gmail.com  Thu Nov 16 07:45:53 2006
From: comechao at gmail.com (comechao)
Date: 16 Nov 2006 04:45:53 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <1163681153.467930.27350@m73g2000cwd.googlegroups.com>

I'm using python couse its clean, fast, fast to develop, easy, beauty,
an alternative. Java its a "mainstream" lang, GPL or not... i think

*sorry for my (pooooor) english

walterbyrd escreveu:

> Some think it will.
>
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
> 
> IMO: it won't make much difference. But I don't really know.



From theller at ctypes.org  Wed Nov 29 03:05:29 2006
From: theller at ctypes.org (Thomas Heller)
Date: Wed, 29 Nov 2006 09:05:29 +0100
Subject: Reading text labels from a Win32 window
In-Reply-To: <1164747712.627907.279640@14g2000cws.googlegroups.com>
References: <1164737556.265751.38680@l12g2000cwl.googlegroups.com>
	<1164747712.627907.279640@14g2000cws.googlegroups.com>
Message-ID: <ekjf07$6n3$1@sea.gmane.org>

jUrner at arcor.de schrieb:
> geskerrett at hotmail.com schrieb:
> 
>> Does anyone know of a way to read text labels from a Win32 application.
>> I am familiar with using pywin32 and the SendMessage function to
>> capture text from Buttons,text boxex, comboboxes, etc, however, the
>> text I am would like to capture doesn't appear to be in a control.
> 
> 
> This article tells the whole story
> 
> "The secret life of GetWindowText"
> http://blogs.msdn.com/oldnewthing/archive/2003/08/21/54675.aspx

Appended is a script that is a fairly straight-forward conversion of the
code in the above article to Python.  Needs ctypes and comtypes.

Python 2.5 already includes ctypes; comtypes can be installed
with 'easy_install comtypes'.

Thomas
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From rtw at freenet.co.uk  Wed Nov  1 12:17:09 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Wed, 01 Nov 2006 11:17:09 -0600
Subject: Style for modules with lots of constants
References: <slrnekhbru.1as.horpner@FIAD06.norwich.edu>
	<XU32h.436$lx6.417@tornado.texas.rr.com>
Message-ID: <Xns986EAF9E3447DrtwfreenetREMOVEcouk@216.196.109.145>

Paul McGuire wrote in news:XU32h.436$lx6.417 at tornado.texas.rr.com in
comp.lang.python: 

> 
> class Constants(object)
>     pass
> 
> (I guess value immutability could probably be implemented using clever
> implementations of __setattr__ and such, but is it really worth the 
> bother?).
> 
> Then I defined the context for my LEFT and RIGHT constants, which are
> being created to specify operator associativity, and then my constant
> fields as attributes of that object:
> 
> opAssoc = Constants(object)
> opAssoc.RIGHT = 0
> opAssoc.LEFT = 1
> 

This is nice, but you can cut down on some of the cruft:

class Constants( object ):
  pass
  
Constants.RIGHT = 0
Constants.LEFT = 1

## client code ...
print Constants.LEFT

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From mccredie at gmail.com  Wed Nov  8 14:16:10 2006
From: mccredie at gmail.com (Matimus)
Date: 8 Nov 2006 11:16:10 -0800
Subject: Exception Handling in TCPServer (was;
	Problem exiting application in Windows Console.)
In-Reply-To: <1163007018.221972.93580@b28g2000cwb.googlegroups.com>
References: <1162987854.490880.46820@h54g2000cwb.googlegroups.com>
	<1163001245.707034.310900@f16g2000cwb.googlegroups.com>
	<1163007018.221972.93580@b28g2000cwb.googlegroups.com>
Message-ID: <1163013370.106292.124880@f16g2000cwb.googlegroups.com>

> This seems a really nasty hack though - any ideas for a cleaner way to
> do it?

You could overload handle_request instead. I think that makes more
sense anyway because you don't want to handle a SystemExit exception as
an error, you want to exit. Of course this only deals with catching the
exception, there may be a better method of shutting down and exiting
the server (other than sys.exit that is).

class HelpServer(HTTPServer):
    def handle_request(self):
        try:
            request, client_address = self.get_request()
        except socket.error:
            return
        if self.verify_request(request, client_address):
            try:
                self.process_request(request, client_address)
            except SystemExit:
                raise SystemExit
            except:
                self.handle_error(request, client_address)
                self.close_request(request)



From vinjvinj at gmail.com  Thu Nov 16 12:03:06 2006
From: vinjvinj at gmail.com (vj)
Date: 16 Nov 2006 09:03:06 -0800
Subject: Has anyone generated Open Office Calc XML  files from python
Message-ID: <1163696586.682642.118450@m7g2000cwm.googlegroups.com>

I have a program which generates xml files for excel but these files
are not recognized by open office calc. I looked at the OO uno library,
but it seems like an over kill.

In my experience, for simpler documents, it is much faster to directly
write to underlying XML format. Has anyone done this? Any idea on the
XML format used by Open Office Calc?

VJ



From rampeters at gmail.com  Thu Nov 30 19:41:31 2006
From: rampeters at gmail.com (johnny)
Date: 30 Nov 2006 16:41:31 -0800
Subject: Multiple FTP download using Muliti thread
Message-ID: <1164933691.138083.128210@l12g2000cwl.googlegroups.com>

I have taken a look at the code that dose one download at time, in
multi threaded manner:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/465531

What I wanted to do is, make it download multiple files at the same
time.  I am new to python and have gone over "Dive In To Python"
yesterday.  Can some give a idea what I need to do.  Once I understand
the big picture, then I can piece together.



From sjmachin at lexicon.net  Tue Nov 21 14:39:15 2006
From: sjmachin at lexicon.net (John Machin)
Date: 21 Nov 2006 11:39:15 -0800
Subject: Parsing/Splitting Line
In-Reply-To: <mailman.540.1164122237.32031.python-list@python.org>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
	<mailman.540.1164122237.32031.python-list@python.org>
Message-ID: <1164137955.242874.282270@h48g2000cwc.googlegroups.com>

Manuel Kaufmann wrote:
> El Martes, 21 de Noviembre de 2006 02:59, acatejr at gmail.com escribi?:
> > I have a text file and each line is a list of values.  The values are
> > not delimited, but every four characters is a value.  How do I get
> > python to split this kind of data?  Thanks.
>
> You can define a function very easy to make it. For example you can do:
>
> # split-line in 'n' characters
> import sys
>
> def splitLine(line, n):
>     """split line in 'n' characters"""
>     x = 0
>     y = 0
>     while line >= n:

The intent appears to be that "line" refers to a str object, while "n"
refers to an int object. Comparison of such disparate objects is
guaranteed to produce a reproducible (but not necessarily meaningful)
result.

For example:

| >>> '' > 2
| True

You need to reconsider what you really want to have happen when there
is a trailing short slice. Possibilities are:

(a) silently ignore it -- what I guess your intent was, but the least
attractive IMO
(b) raise an exception -- overkill IMO
(c) just tack it on the end (which is what your code is currently doing
*accidentally*) -- and mention this in the docs and let the caller do
what they want with it.

>     	y = x + n
>         if line[x:y] == '':
>             break
>         yield line[x:y]
>         x += n
>
> if __name__ == '__main__':
>     # i get the line-split from the command line
>     # but you can get it from a file
>     for x in splitLine(sys.argv[1], int(sys.argv[2])):
>         print x
>

HTH,
John



From li.yun.bin at gmail.com  Sat Nov 25 10:15:35 2006
From: li.yun.bin at gmail.com (YunBin Lee)
Date: 25 Nov 2006 07:15:35 -0800
Subject: Return float problem.
Message-ID: <1164467735.644775.289030@m7g2000cwm.googlegroups.com>

Hi, all.
I have a problem of float return error in python c binding module.
Below is my c sources, compile commands and result of program.

========== wrap.c =========
#include <Python.h>

PyObject *wrap_fact(PyObject *self, PyObject *args)
{
double n=0.0,result=0.0;
    if (!PyArg_ParseTuple (args,"d:fact",&n))
        return NULL;
    result = fact(n);
    result = fact(result);
    return Py_BuildValue("d",result);
}

PyObject *wrap_test(PyObject *self, PyObject *args)
{
double value = 0.124;
    return Py_BuildValue ("d", value);
}

static PyMethodDef exampleMethods[] =
{
    {"fact", wrap_fact, METH_VARARGS, "Simple return a float"},
    {"test", wrap_test, METH_VARARGS, "Test"},
    {NULL,NULL}
};

void initexample()
{
    PyObject *m;
    m = Py_InitModule ("example", exampleMethods);
}
========== end wrap.c =========

========== example.c =========
#include <stdio.h>

double fact(double n)
{
    printf ("n=%f\n",n);
    return n;
}

int main(int argc,char *argv[])
{
    printf ("%f\n",fact(0.1234));
}
========== end example.c =========

complied with commands:
lyb at ubuntu:~$ gcc -fpic -c -I. -I.. -I/usr/include/python2.4/ example.c
wrap.c
lyb at ubuntu:~$ gcc -shared -o example.so example.o wrap.o

then i used the example.so with command:
lyb at ubuntu:~$ python -c "import example; print example.fact(0.444)"
n=0.444000
n=-103079215.000000 <-- Why not is 0.444?
-1140850688.0 <--- Why not is 0.444?



From hollowspook at gmail.com  Sun Nov 26 05:38:52 2006
From: hollowspook at gmail.com (hollowspook)
Date: 26 Nov 2006 02:38:52 -0800
Subject: problem about list indexing
In-Reply-To: <1164533754.269071.149590@n67g2000cwd.googlegroups.com>
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
	<1164533754.269071.149590@n67g2000cwd.googlegroups.com>
Message-ID: <1164537532.420669.323520@45g2000cws.googlegroups.com>

Thanks, John

how about indexing 1-7, 10
[range(1:8),10] will generate [[1, 2, 3, 4, 5, 6, 7], 10], instead of
[1, 2, 3, 4, 5, 6, 7, 10]


"John Machin ???
"
> hollowspook wrote:
> > Hi, there
> >
> > a = range(100)
> >
> > if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7],
> > a[11], a[56], a[90]].
> > Is there any other way?
> >
>
> I presume a = range(100) is just an indication that a is a list -- the
> literal answer to your question as asked is simply [7, 11, 56, 90]
>
> In the general case that a is *any* list (or anything else that
> supports the index protocol, e.g. a string, a tuple, an array.array
> instance, or some instance of a so-written class), you can use a "list
> comprehension". Example:
>
> | >>> a = 'qwertyuiopasdfghjklzxcvbnm'
> | >>> [a[x] for x in [25, 0, 13, 1]]
> | ['m', 'q', 'f', 'w']
>
> Do try and find "list comprehension" in the manual and in your book or
> tutorial. It's useful for much more than the above.
> 
> HTH,
> John



From PrikrylP at skil.cz  Thu Nov 30 06:18:52 2006
From: PrikrylP at skil.cz (Petr Prikryl)
Date: Thu, 30 Nov 2006 12:18:52 +0100
Subject: Python language extension mechanism for Python 3000... Worth for PEP?
Message-ID: <E8AE1CAFC84D634A9CCC887B8AAB15EC0EA54D@skil01.skil.mistni>


Do you think that the following could became PEP (pre PEP).
Please, read it, comment it, reformulate it,... 

Abstract 

  Introduction of the mechanism for language extensions via
  modules written using other languages. Extensions of
  Python could be done via special interpreter extensions.
  From Python sources, the special modules would look like
  other modules, with the Python API (the key feature from
  the Python interpreter's point of view). Inside the
  special modules, special language features could be
  implemented and would possibly be interpreted by a
  different interpreter (the key feature to please those who
  want to use some special extensions).

  The goal could be summarized as extension of the idea of
  writing modules in Python or in C languages. Other kind of
  modules could be introduced. Then Python would work not
  only as a glue for modules and utilities, but could also
  be the glue for different interpreters.
  
  
Motivation 

  Note: The idea emerged when looking at the video 
  http://video.google.com/videoplay?docid=-6459339159268485356
  and when thinking about it. The sequences from it will be 
  referenced like [video 2:10 - 2:30]. I do not want to be
  the one of the group of the "everybody is the language
  designer" [video 25:47]. The goal is rather to bypas the
  problem mentioned in [video 25:35 - 27:50].

  There are doubts whether some features should be added to
  Python 3000 or whether some features are to be removed.
  The goal is to get rid of the obsolete features but the
  contradictory goal is not to break the backward
  compatibility. [video 7:00 - 7:30 - 8:10 - 8:45]
  
  There are some group of users of Python with special
  interests or with some special tastes for programming
  styles. 
  
  For example, some users like functional programming
  (lambda, reduce, map,...). They have expressed so
  eloquently their wishes that the Python 3000 is not to
  remove lambda. On the other hand, only the (current)
  simple form of lambda expressions will remain. [video
  41:38 - 43:34] Possibly, the unpleased "functional" people
  would be pleased if they could write some modules with
  more powerful lambda that would be interpreted by some
  special extension of the Python language interpreter.
  
  The new, requested special features used only by minority
  of programmers (but not by the unimportant minority) could
  be implemented outside the core of the Python interpreter.
  
  
Rationale 

  To keep the (Python) language clean, it is a good idea to
  simplify the syntax as much as possible -- if it does not
  lead to the loss of the power. 
  
  Some languages are better for some tasks. There will
  always be people that want to extend the core of the
  language to support their wishes. The extension of the
  language via special kinds of modules would not upset the
  pure Pythonistas and will please "the pure
  functional-languages followers", for example.
  
  There already is something similar available inside the
  Python interpreter: some modules are implemented in the C
  language. The key idea is that they offer the same kind of
  interface that the modules written in Python do.
  
  In some sense, Python interpreter is not interested in how
  the results from the function call are obtained (whether
  the content of the module must be processed by the Python
  interpreter or whether the binary code will do it). In
  some sense, the module written in C can be seen as using
  "no-interpreter extension".
  
  The idea of the module implementation language could be 
  extended (generalized) from "Python or C" to "Python or C
  or Python-extension". The "Python extension" would be
  implemented and maintained separately and would not spoil
  the development of the core.
  
  Technically, the goal is to separate the core of the
  Python language from extensions that will be known in
  future. In some sense, the mechanism is the adapter to the
  something else to give it Python interface. The C/C++
  would not be the only alternative to implement a module
  used from a Python script.
  
  If modules can be viewed as prefabricated building blocks
  for writing the Python programs, the interpreter
  extensions could be viewed as building blocks for
  the interpreter functionality.
  
  As modules, some interpreter extensions could be standard,
  some could even be considered built-in, some could be
  from third parties. 
  
  Some interpreter extensions could be used as a testbed for
  adding new features: 
  
  For example, pure UTF-16 sources could be preprocessed by
  some "experimental" interpreter extension to the form that
  could be consumed by the core interpreter. And one day,
  the UTF-8 or 8-bit with explicitly stated encoding can be
  transformed to the only modern UTF-16 representation that
  new sources should use. The designers of the core language
  may freely decide to change the internals if they provide
  the adapter via the extension.  
  
  Another "backward-compatibility extension" could check
  whether some old feature could reliably be replaced by new
  feature and translate the old source to the new one on the
  fly.

  
  
Backwards Compatibility

  This would be new feature. It will not break the backward
  compatibility. 
  
  From another point of view, the mechanism can even improve
  the backward compatibility of Python 3000 for example by
  embeding the Python 2.x interpreter inside and recognition
  of the modules written for Python 2.x language version.
  The oldness of the legacy module could be recognized by
  the Python 3000 interpreter and the module could be passed
  to the extension responsible for interpretation of the old
  code.

  


From bla at bla.com  Thu Nov 30 09:48:53 2006
From: bla at bla.com (Vincent Delporte)
Date: Thu, 30 Nov 2006 15:48:53 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>
	<pan.2006.11.28.09.15.45.744752@gmx.net>
	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>
	<7nqtm25fq8vk4jlu577n974hgei3ese3g7@4ax.com>
Message-ID: <hnrtm25a9s72a6bacjocreq4md14sr4qar@4ax.com>

On Thu, 30 Nov 2006 15:38:11 +0100, Vincent Delporte <bla at bla.com>
wrote:
>Here's my Python rewrite:
>http://codecomplete.free.fr/asterisk/python_cid.txt

More information. Here's what Asterisk says when I call in:

*CLI>

    -- Executing LookupCIDName("SIP/fxo-0844e458", "") in new stack

    -- Changed Caller*ID name to Work

    -- Executing AGI("SIP/fxo-0844e458",
"ncid.python.agi|087077XXXX|Bureau Freebox") in new stack

    -- Launched AGI Script /var/lib/asterisk/agi-bin/ncid.python.agi
Failed to execute '/var/lib/asterisk/agi-bin/ncid.python.agi': Exec
format error

    -- AGI Script ncid.python.agi completed, returning 0

FWIW, I wrote the original in a Windows text editor, and copy-pasted
the script in Asterisk by sshing into the server. CRLF vs. CR issue?
Something else?

Thanks.


From niels.ellegaard at gmail.com  Mon Nov 27 23:32:03 2006
From: niels.ellegaard at gmail.com (Niels L Ellegaard)
Date: 27 Nov 2006 20:32:03 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1163791069.178490.198740@j44g2000cwa.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
	<1163791069.178490.198740@j44g2000cwa.googlegroups.com>
Message-ID: <1164688323.313420.295260@h54g2000cwb.googlegroups.com>

Filip Wasilewski wrote:
> As far as the speed comparison is concerned I totally agree that NumPy
> can easily outperform Matlab in most cases. Of course one can use
> compiled low-level extensions to speed up specific computations in
> Matlab, but it's a lot easier and/or cheaper to find very good tools
> for Python.

These benchmarks are interesting. Perhaps someone could elaborate: When
is python faster than Matlab and when is it slower? As far as I
understand, recent versions of Matlab include a jit, but cpython does
not (unless you use psyco). Can python do faster do-loops than matlab?
Does the matrix backend of python perform faster than a the matrix
backend of Matlab? What is going on?

                                                Thanks in advance

                                                              Niels

BTW: I feel obliged to provide a small link to your upcoming wavelet
code for scipy. It looks promising:
http://wavelets.scipy.org/moin/



From stevech1097 at yahoo.com.au  Mon Nov 20 07:29:01 2006
From: stevech1097 at yahoo.com.au (Steve Chaplin)
Date: Mon, 20 Nov 2006 20:29:01 +0800
Subject: How to create a writeable buffer?
Message-ID: <45619f78$1@quokka.wn.com.au>

I'm trying to create an object (as a C extension) to support the buffer 
interface and was getting "TypeError: buffer is read-only" errors. So I 
had a look at the array object and it has the same problem:

$ python
 >>> import array
 >>> a=array.array('c', ['a', 'b', 'c'])
 >>> a
array('c', 'abc')
 >>> a[0]
'a'
 >>> a[0]='d'
 >>> a
array('c', 'dbc')
 >>> buf=buffer(a)
 >>> buf[0]
'd'
 >>> buf[0]='e'
TypeError: buffer is read-only

The array is a mutable (writable) object, and the array implements the 
buffer interface and provides a 'getwritebuf' method.
(Python-2.4.4/Modules/arraymodule.c has an array_buffer_getwritebuf())
so why does it give "TypeError: buffer is read-only"?

Steve


From sittner at lkb.ens.fr  Mon Nov  6 17:15:07 2006
From: sittner at lkb.ens.fr (sittner at lkb.ens.fr)
Date: Mon, 6 Nov 2006 23:15:07 +0100 (CET)
Subject: you can erase me last message - a mistake....
Message-ID: <52471.81.67.23.46.1162851307.squirrel@mailgate.phys.ens.fr>

you can erase the message about python sound modules, my mistake.
thanks,
g



From kw at kevin-walzer.com  Mon Nov 20 21:19:46 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Mon, 20 Nov 2006 21:19:46 -0500
Subject: Tile: anyone using it in Tkinter apps?
Message-ID: <8af47$45626248$4275d90a$14809@FUSE.NET>

Is anyone using Tile in their Tkinter applications?

Tile provides native theming for Windows XP and Mac OS X, and provides
an improved Tk look-and-feel on Unix/Linux.

For info on Tile: http://tktable.sourceforge.net/tile

It's in the process of going into the Tk core, so it will be available
with Tk 8.5 with no additional libraries required.

Just curious to see how other Python developers are using it (or if they
are). I'm moving to Python/Tkinter from Tcl/Tk, and I'm an enthusiastic
user of Tile with Tcl.

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


From JKPeck at gmail.com  Mon Nov 13 12:51:50 2006
From: JKPeck at gmail.com (JKPeck)
Date: 13 Nov 2006 09:51:50 -0800
Subject: Character Encodings and display of strings
In-Reply-To: <4rrjibFspqicU3@mid.uni-berlin.de>
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
	<mailman.62.1163428860.32031.python-list@python.org>
	<1163429791.517778.46220@f16g2000cwb.googlegroups.com>
	<4rrjibFspqicU3@mid.uni-berlin.de>
Message-ID: <1163440310.722375.156930@m7g2000cwm.googlegroups.com>

It seemed to me that this sentence

For many types, this function makes an attempt to return a string that
would yield an object with the same value when passed to eval().

might mean that the encoding setting of the source file might influence
how repr represented the contents of the string.  Nothing to do with
Unicode.  If a source file could have a declared encoding of, say,
cp932 via the # coding comment, I thought there was a chance that eval
would respond to that, too.


Diez B. Roggisch wrote:
> JKPeck wrote:
>
> > Thanks for the quick answer.  I thought repr was involved here, but
> > when I use repr explicitly I get a notation where the backslashes are
> > escaped.  I also though that with the encoding explictily declared in
> > the source, that repr would take that into account and use the
> > character form, but obviously it doesn't.
>
> The encoding in the source has nothing to do with that. How should an
> encoding (and possibly a gazillion different ones in gazillion other
> sourcefiles of yours) influence the list repr code?
>
> The encoding in the source-file is solely used to correctly parse unicode
> literals, as these need a specific encoding to be generated from the
> byte-string they are in the sourcecode.
> 
> Diez



From vincent.arnoux at rfo.atmel.com  Tue Nov 28 05:23:56 2006
From: vincent.arnoux at rfo.atmel.com (Vincent Arnoux)
Date: Tue, 28 Nov 2006 11:23:56 +0100
Subject: Reading GDSII layouts
Message-ID: <200611281123.56505.vincent.arnoux@rfo.atmel.com>

Hello,
I am looking for a library for reading GDSII layout files structures (hierarchy, cells names, ...).
I found IPKISS (http://www.photonics.intec.ugent.be/research/facilities/design/ipkiss/default.htm),
but it looks to be a generator and not a reader.

Thank you,
Vincent




From phil at riverbankcomputing.co.uk  Wed Nov 22 08:14:02 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Wed, 22 Nov 2006 13:14:02 +0000
Subject: PyQt app in seperate thread
In-Reply-To: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
Message-ID: <200611221314.02794.phil@riverbankcomputing.co.uk>

On Wednesday 22 November 2006 12:37 pm, anders wrote:
> I am writing a plugin for a piece of software in python, and I want to
> start up a PyQt GUI in the plugin, without stalling the main thread
> while the gui is running (later i will want to pass messages between
> the main thread and the gui thread).
>
> I'm new to pyqt, so I'm probably doing something very silly, but for
> the moment I'm just trying to get the first pyqt tutorial example
> running in a seperate thread:
>
> ----8<--------
>
> import sys
> from PyQt4 import QtGui
> from PyQt4 import QtCore
>
> class MyThread( QtCore.QThread ):
> 	def __init__( self ):
> 		QtCore.QThread.__init__( self )
>
> 	def run( self ):
> 		app = QtGui.QApplication( sys.argv )
> 		hello = QtGui.QPushButton( 'Hello world!' )
> 		hello.resize( 500, 500 )
> 		hello.show()
> 		app.exec_()
> 		QtCore.QThread.terminate(  )
>
>
>
> mt = MyThread()
> mt.start()
> print 'Main thread continuing...'
> mt.wait()
> print 'GUI thread finished.'
>
> ----8<--------
>
> The app starts up (with a warning WARNING: QApplication was not created
> in the main() thread. ). I get a window, but no button, and clicking on
> the close button does nothing and I have to force the program to quit.
>
> There's got to be a way to get this working, right? Can anyone help me
> along the right path?

Read http://doc.trolltech.com/4.2/threads.html

In particular the bit that says that exec_() must be called from the main 
thread and not from a QThread.

Phil


From erikwickstrom at gmail.com  Tue Nov 14 09:05:01 2006
From: erikwickstrom at gmail.com (erikcw)
Date: 14 Nov 2006 06:05:01 -0800
Subject: Programmatically finding "significant" data points
Message-ID: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>

Hi all,

I have a collection of ordered numerical data in a list.  The numbers
when plotted on a line chart make a low-high-low-high-high-low (random)
pattern.  I need an algorithm to extract the "significant" high and low
points from this data.

Here is some sample data:
data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
0.10]

In this data, some of the significant points include:
data[0]
data[2]
data[4]
data[6]
data[8]
data[9]
data[13]
data[14]
....

How do I sort through this data and pull out these points of
significance?

Thanks for your help!

Erik



From mirandacascade at yahoo.com  Mon Nov 20 14:18:40 2006
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 20 Nov 2006 11:18:40 -0800
Subject: SOAP example (getting stock price) - verifying endpoint url
Message-ID: <1164050320.538688.194810@j44g2000cwa.googlegroups.com>

Operating system: Win XP

Is it possible that the endpoint url of:

"http://66.28.98.121:9090/soap"

that is provided for the SOAP example of calling GetQuote has changed
or is no longer in use?  If it has changed, what is the new endpoint
url?

The reasons I ask are that I observed 3 different timeout symptoms:

1) When running the testquote application from ElementSOAP (which uses
that endpoint url), received the following:

Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\Python24\Lib\site-packages\elementsoap\testquote.py", line
16, in ?
    print "MSFT", q.getQuote("MSFT")
  File "C:\Python24\Lib\site-packages\elementsoap\testquote.py", line
12, in getQuote
    response = self.call(action, request)
  File "C:\Python24\lib\site-packages\elementsoap\ElementSOAP.py", line
213, in call
    parser=namespace_parse
  File "C:\Python24\lib\site-packages\elementsoap\HTTPClient.py", line
164, in do_request
    h.endheaders()
  File "C:\Python24\lib\httplib.py", line 794, in endheaders
    self._send_output()
  File "C:\Python24\lib\httplib.py", line 675, in _send_output
    self.send(msg)
  File "C:\Python24\lib\httplib.py", line 642, in send
    self.connect()
  File "C:\Python24\lib\httplib.py", line 626, in connect
    raise socket.error, msg
error: (10060, 'Operation timed out')

2) When I copy/paste the endpoint url into a browser (Firefox), I
receive a "the connection has timed out" message in the browser.

3) Attempted a ping from the command prompt:

C:\>ping 66.28.98.121

Pinging 66.28.98.121 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 66.28.98.121:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

Thank you.



From sjmachin at lexicon.net  Tue Nov 14 01:30:53 2006
From: sjmachin at lexicon.net (John Machin)
Date: 13 Nov 2006 22:30:53 -0800
Subject: A question on Encoding and Decoding.
References: <1163443052.228761.318200@h54g2000cwb.googlegroups.com>
Message-ID: <1163485853.267685.284940@h54g2000cwb.googlegroups.com>

kath wrote:
> Hi all,
>
> Platform:            winxp
> Version:             Python 2.3
>
> I have a task of reading files in a folder and creating an one excel
> file with sheets, one sheet per file, with sheet named as filename. I
> am facing problem in handling special characters. I am using XLRD and
> XLW package to read/write  from/to file.

The name of the first package is "xlrd", *NOT* "XLRD".

By "XLW"; do you mean python2xlw? If so, why don't you upgrade to
Python 2.4 or 2.5 so that you can use  pyExcelerator (which is the most
modern and least unmaintained of the pure-Python Excel-writing
gadgets)? If you can't upgrade, consider using pyXLWriter instead.

Note that python2xlw is *NOT* intended to be a general-purpose Excel
file writer. From the top of its XLW.py:
'''Simple XLW file maker.
Can create data sheets and Scatter Charts from the data sheets.
Data sheet is defined as a list of rows.
The first row contains labels, subsequent rows are numeric.
Charts are defined by adding XY series.
Series are defined as zero-based indeces to the dataSheet, XColumn, and
YColumn.
The entire column will be plotted.'''

Are you sure that the description "The first row contains labels,
subsequent rows are numeric." fits your data?

At this stage, sentient beings who are looking for a general-purpose
Excel writer and who are not skeptics would probably turn away. Kinda
makes you believe it won't handle *any* kind of string (either str or
Unicode) at rowx == 76. Game over. "77 Sunset Row" :-)

It turns out that what happens (quite independently of row number) is:
Ints and reals are spat out as Excel NUMBER records.
For *any* other Python type, it attempts (without benefit of try/accept
or any other prophylactic) to write str(value)[:254] to an Excel LABEL
record.
Apart from silent truncation of data, this will cause:
* unicode data that contains non-ASCII characters to produce a
UnicodeDecodeError
* a long item e.g. 1234567890L to appear as an Excel text type with
value"1234567890", not an Excel number type wirth value 1234567890.0

Oh, and if you forgot to call the XLW.XLW.addChart method, it kindly
remedies your deficiency by supplying one. What if you consciously
don't want any ferschlugginer charts?

Unfortunately, outside the Redmond Pale, knowledge of charts in .XLW
files is scant. Given such a file:
* Gnumeric 1.6.something (Windows version) crashes
* OpenOffice.org's Calc 2.0.something (Windows version) thinks silently
for a second or two, then leaves you with an empty worksheet, and no
charts, and no message.
* xlrd grumbles that it was expecting a worksheet, and gives up -- I'll
fix this; it'll expect a chart as a possibility, and ignore it (as with
XLS files).

> But facing problem in handling
> special characters. I am getting encode error.

Have you read any of these:
(a) The notes on Unicode in the xlrd documentation?
(b) The Unicode howto (http://www.amk.ca/python/howto/unicode)
?

>
> UnicodeDecodeError 'ascii' codec can't encode character u'\xdf' in
> position 19: ordinal not in range(128)
> row:  76
>
> the cell value at rowx = 76, colx = 0  is
> 'Activest-Aktien-Gro?britannien'

:-)
Gross Brits? Must be talking about the "Barmy Army" :-)
:-)

>
> I used Latin-1 encoding,

If, as it seems, you think you've found out what the problem is, fixed
it, and continued on, why bother telling us?

> but after the file is created I get an error
> 'Unable to read the file'.

*WHAT* program is producing this error message? Under what
circumstances?

>
> When I get the exception I want to format the string so that I can use
> it to write to a file and also query database.

Never mind what you want; what you *need* is to encode your data with
the appropriate encoding, so that you *don't* get the exception. Then
it should be a good old legacy str instance, suitable for writing
anywhere within reason. You can query your database with str and/or
unicode data, depending on how it is stored and whether the database
interface converts on the fly -- read the database-specific docs and/or
ask a specific question.

>
> Can anybody guide how to solve this problem. what encoding I should
> use, and after wring to file I should the same special character.

My parser barfed on that last clause:
ParseFailure: After "wring", expected "neck"
:-)

The encoding that you should use is one that encompasses all your data.
If latin1 doesn't hack it, switch to pyExcelerator (as already
recommended); it will write the latest (only 9 years old) version of
Excel files which are recorded in utf_16_le.

What makes you think that the encoding problem (which you appear to
have fixed (at least temporarily)) is anything at all to do with the
mystery program saying 'Unable to read the file"? Have you tried a test
input file which has *only* ASCII text in it?

>
> Also python IDLE is able to output the same character corretly when I
> say print and why not I?

I have to go out now, so I'll leave something for someone else to
answer.

>
>
> Any suggestions would be greatly appreciated.
>

If it all becomes too hard, try sending me (1) a two-sheet input test
file for your app (2) the corresponding error-message-causing output
file and (3) your code, and I'll have a look at it.

Cheers,
John



From ardsrk at gmail.com  Mon Nov  6 04:33:36 2006
From: ardsrk at gmail.com (ArdPy)
Date: 6 Nov 2006 01:33:36 -0800
Subject: Learning Python
In-Reply-To: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
References: <1162803632.788766.147590@e3g2000cwe.googlegroups.com>
Message-ID: <1162805615.944184.138050@h48g2000cwc.googlegroups.com>


kaushal wrote:
> Hi
>
> How do i start Learning Python,is there any reference material which I
> can refer since I dont have
> any programming experience
>
> Thanks and Regards
>
> Kaushal

Hi kaushal,

Look into http://diveintopython.org. Dive into python is a really
readable ebook...enjoy



From steve at holdenweb.com  Thu Nov 16 09:08:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Nov 2006 14:08:43 +0000
Subject: Python v PHP: fair comparison?
In-Reply-To: <2006111607574875249-jameshcunningham@gmailcom>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>	<455baf21$0$28561$426a74cc@news.free.fr>	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>	<2006111523045616807-jameshcunningham@gmailcom>	<mailman.243.1163673962.32031.python-list@python.org>
	<2006111607574875249-jameshcunningham@gmailcom>
Message-ID: <ejhrav$170$2@sea.gmane.org>

James Cunningham wrote:
> On 2006-11-16 05:46:45 -0500, Steve Holden <steve at holdenweb.com> said:
> 
>> James Cunningham wrote:
>>> On 2006-11-15 20:59:26 -0500, "walterbyrd" <walterbyrd at iname.com> said:
>>>
>>>> Bruno Desthuilliers wrote:
>>>>> walterbyrd a ?crit :
>>>>> You mean there are web hosting companies that are still using Apache
>>>>> 1.3.x ?
>>>>>
>>>> Practically all web-hosters still use Apache 1.3.x. Certainly all of
>>>> the lower priced hosters.
>>> Not true. Dreamhost, at least, uses Apache 2.
>> So you thin a single counter-example disproves an assertion that begins 
>> with "practically all"?
> 
> Nope. It disproves your assertion that "certainly all of the lower 
> priced hosters" use Apache 1.3.
> 
> "Certainly all".
> 
> "Certainly" "all".
> 
Certainly. But not my assertion.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From allenjo5 at mail.northgrum.com  Fri Nov 24 12:03:41 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 24 Nov 2006 09:03:41 -0800
Subject: Python popenX() slowness on AIX?
References: <1164059636.171319.121310@j44g2000cwa.googlegroups.com>
	<gmB8h.46111$39.18831@southeast.rr.com>
	<1164117707.309823.237640@j44g2000cwa.googlegroups.com>
	<1164119554.955532.236180@b28g2000cwb.googlegroups.com>
	<1164124553.907183.261220@m7g2000cwm.googlegroups.com>
	<1164142934.364814.191210@m73g2000cwd.googlegroups.com>
	<20061122000251.56e894dd.hoendech@ecc.lu>
Message-ID: <1164387821.375946.191430@m7g2000cwm.googlegroups.com>

Stefaan A Eeckels wrote:
> On 21 Nov 2006 13:02:14 -0800
> allenjo5 at mail.northgrum.com wrote:
>
> > The fact that it does this in Python code instead of C is the main
> > cause of the slowness.  So, unless Python is changed to do this in C,
> > it's always going to be slow on AIX :-(
>
> I guess that the reason it's slow is that there are many descriptors to
> try and close. Reducing them using ulimit -n could improve the speed.
>
> AIX has a fcntl command to close all open file descriptors from a
> descriptor onwards:
>
> fcntl(3, F_CLOSEM);
>
> This of course should be used instead of the loop:
>
> import sys
> import fcntl
>
> __all__ = ["popen2", "popen3", "popen4"]
>
> ...
>
>     def _run_child(self, cmd):
>         if isinstance(cmd, basestring):
>             cmd = ['/bin/sh', '-c', cmd]
>         try:
>             os.fcntl(3, 10, 0)
>         except OSError:
>             pass
>         try:
>             os.execvp(cmd[0], cmd)
>         finally:
>             os._exit(1)
>
> 10 happens to be the value of F_CLOSEM (from /usr/include/fcntl.h).
> I've currently no access to an AIX system with Python, but it could be
> worth trying.

Yes, very much worth it.  F_CLOSEM is _so_ much better than the loop,
even in C.   Using your brilliant suggestion, I now have a simple patch
to the python source that implements it for any OS that happens to have
the fcntl F_CLOSEM option.   It is below in its entirety.  I believe I
got the try: stuff correct, but since I'm new to Python, I'd appreciate
any comments.

I have another patch to implement my os.rclose(x,y) method, which would
improve the speed of popenX() for the OSes that don't have F_CLOSEM, by
doing the close() loop in C instead of Python,  but I don't know if it
would be as likely to be accepted as this probably would be.

Now, where do I send my proposed patch for consideration?

John.

--- ./Modules/fcntlmodule.c.orig	Thu Jun  3 08:47:26 2004
+++ ./Modules/fcntlmodule.c	Fri Nov 24 11:18:23 2006
@@ -545,6 +545,11 @@
         if (ins(d, "DN_MULTISHOT", (long)DN_MULTISHOT)) return -1;
 #endif

+/* For systems like AIX that have F_CLOSEM to close multiple fds */
+#ifdef F_CLOSEM
+        if (ins(d, "F_CLOSEM", (long)F_CLOSEM)) return -1;
+#endif
+
 #ifdef HAVE_STROPTS_H
 	/* Unix 98 guarantees that these are in stropts.h. */
 	INS(I_PUSH);
--- ./Lib/popen2.py.orig	Thu Feb 10 08:46:14 2005
+++ ./Lib/popen2.py	Fri Nov 24 11:37:15 2006
@@ -8,6 +8,7 @@

 import os
 import sys
+import fcntl

 __all__ = ["popen2", "popen3", "popen4"]

@@ -65,11 +66,18 @@
     def _run_child(self, cmd):
         if isinstance(cmd, basestring):
             cmd = ['/bin/sh', '-c', cmd]
-        for i in range(3, MAXFD):
-            try:
-                os.close(i)
-            except OSError:
-                pass
+	try:
+	    if fcntl.F_CLOSEM:
+		try:
+		    fcntl.fcntl(3, fcntl.F_CLOSEM, 0)
+		except OSError:
+		    pass
+	except AttributeError:
+	    for i in range(3, MAXFD):
+		try:
+		    os.close(i)
+		except OSError:
+		    pass
         try:
             os.execvp(cmd[0], cmd)
         finally:



From antoine at vo.lu  Tue Nov  7 05:07:37 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Tue, 07 Nov 2006 11:07:37 +0100
Subject: shutil: permission denied errors on windows
In-Reply-To: <1162858987.931532.61530@h48g2000cwc.googlegroups.com>
References: <31b03$454f63b6$544abc47$26270@news.hispeed.ch>
	<1162858987.931532.61530@h48g2000cwc.googlegroups.com>
Message-ID: <af162$45505aea$544abc47$10376@news.hispeed.ch>

Yes it's strange, I never had the problem before, either. It seems now 
to be only the case for folders. A very simple

shutil.copy('a', 'b')

already fails with the error message.

I reinstalled Python, but that didn't change anything...

Regards,
antoine

John Henry wrote:
> I use the copy function a lot and never have problem.  I suggest that
> you write a no brainer standalone test code and if it still fails
> there, then you have a problem with your installation.
> 
> Antoine De Groote wrote:
>> Google tells quite some things about it, but none of them are satisfactory.
>>
>> I'm on Windows, and shutil operations (e.g. move, copy) throw [Errno 13]
>> Permission denied all the time, for the source files. It seems that this
>> is the case for all my files. But what I don't understand is that
>> yesterday it still worked. I didn't change anything on my system though
>> (at least not that I am aware of). I restarted the computer several
>> times to see if that helped, but it didn't. Also I can't find a process
>> that would be using the files...
>>
>> Has anybody experienced this problem before, or have a solution?
>>
>> Kind regards,
>> antoine
>>
>> Here's the code that throws the errors
>>
>> [...]
>> for l in files:
>>              from_file = os.path.join(dir, l)
>>              to_file = from_file.replace(tree_top, backup_dir)
>>              try:
>>                  if not os.path.exists(to_file):
>>                      log('Copying new      %s' % from_file)
>>                      counter_new += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif int(os.path.getmtime(from_file)) >
>> int(os.path.getmtime(to_file)):
>>                      log('Copying modified %s' % from_file)
>>                      counter_mod += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif os.path.getsize(from_file) > os.path.getsize(to_file):
>>                      log('Sizes differ, but not rest: Copying %s' %
>> from_file)
>>                      counter_special += 1
>>                      shutil.copy2(from_file, to_file)
>>                  elif os.path.getsize(from_file) < os.path.getsize(to_file):
>>                      log('Orig file smaller than backup file: Copying
>> %s' % from_file)
>>                      counter_special += 1
>>                      shutil.copy2(to_file, backup_dir+'DIFF_SIZE')
>>                      shutil.copy2(from_file, to_file)
>>                  else:
>>                      #log('not treated: %s' % l)
>>                      pass
>>
>>              except (OSError, IOError), e:
>>                  not_accessible += 1
>>                  print e
>> [...]
> 


From matthewperpick at gmail.com  Wed Nov 15 12:01:04 2006
From: matthewperpick at gmail.com (matthewperpick)
Date: 15 Nov 2006 09:01:04 -0800
Subject: using converters, adapters in sqlite3
Message-ID: <1163610064.752327.188120@h48g2000cwc.googlegroups.com>

hello,

i want to make use of sqlite3's "adapter" and "converter" capabilities
but my classes are more complex than the point examples in the python
documentation (http://docs.python.org/lib/node347.html), because they
include foreign keys to othe rtables.

I don't want to concatenate those with the class' other data in one
column because then I lose the ability to filter data by FK in my
select queries.

so .. I was hoping someone could show me how to write converters &
adapters that will allow me to each attribute in its own column.

Thanks very much,

Matt



From fredrik at pythonware.com  Tue Nov 28 06:39:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 12:39:43 +0100
Subject: SAX2 Download
In-Reply-To: <1164713027.460945.252580@n67g2000cwd.googlegroups.com>
References: <1164713027.460945.252580@n67g2000cwd.googlegroups.com>
Message-ID: <ekh75u$5am$1@sea.gmane.org>

Mike P wrote:

> Does anyone know where i can download acopy of the SAX2 module?

the built-in xml.sax module implements the SAX 2 protocol, if that's 
what you're looking for:

     http://docs.python.org/lib/module-xml.sax.html

</F>



From bytter at gmail.com  Wed Nov 29 14:35:52 2006
From: bytter at gmail.com (Bytter)
Date: 29 Nov 2006 11:35:52 -0800
Subject: libboost, python, and dijkstra shortest path
In-Reply-To: <1164822664.826189.28760@80g2000cwy.googlegroups.com>
References: <1164822664.826189.28760@80g2000cwy.googlegroups.com>
Message-ID: <1164828952.285225.193680@j72g2000cwa.googlegroups.com>

Ok, found the solution here: http://www.osl.iu.edu/~dgregor/bgl-python/

But still cannot make anything that works... Anyone who has experience
in this area can help me with the following code:

import boost as bgl

graph = bgl.Graph()
a = graph.add_vertex()
b = graph.add_vertex()
e = graph.add_edge(a, b)

weights = graph.edge_property_map('integer')
weights[e] = 5
graph.edge_properties['weight'] = weights

boost.dijkstra_shortest_paths(graph, a)


On Nov 29, 5:51 pm, "Bytter" <byt... at gmail.com> wrote:
> Hi everyone,
>
> I need to implement a very quick (performance-wise) Dijkstra shortest
> path in python, and found that libboost already has such thing. Problem
> is: I cannot find the installation package for my Python 2.4 under
> windows. Can someone please provide me instructions for installing
> libboost for python?
>
> In alternative, if someone can point out to a fast Dijkstra shortest
> path in python (the network is over 1 million vertexes), I would
> appreciate.
> 
> Thanks in advance,
> 
> Hugo Ferreira



From paul at boddie.org.uk  Thu Nov 16 08:39:57 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 05:39:57 -0800
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<455c54c4$1@quokka.wn.com.au>
	<ejhmu9$3pq$1@kohl.informatik.uni-bremen.de>
Message-ID: <1163684397.700298.303410@m7g2000cwm.googlegroups.com>

Stephan Kuhagen wrote:
>
> Sounds very likely, but does not solve the problem. With resource management
> on the OS level you can indeed set some important limits for untrusted
> scripts, but there are at least two drawbacks, which come to my mind (and
> maybe more, that I'm not aware of): 1. OS level can always only implement
> the lowest common denominator of all OS resource managements to be platform
> independent, which is a strong requirement, IMO.

I think I understand what you intend to say here: that some kind of
Python sandbox relying on operating system facilities can only depend
on facilities implemented in all of the most interesting operating
systems (which I once referred to as "the big three", accompanied by
howls of protest/derision). Yet just as people like to say that
choosing a language is all about "choosing the right tool for the job",
shouldn't the choice of operating system be significant as well? If
you're running a "Try Python" Web site, as some people were doing a few
months ago, isn't it important to choose the right operating system as
part of the right complete environment, instead of having the
theoretical possibility of running it on something like RISC OS, yet
having someone take your site down within seconds anyway? I don't know
whether it's the same people who like to promote "how well Python plays
with everything else" who also demand totally cross-platform solutions
("if it doesn't work on Windows, we won't do it"), but if so, I'd be
interested in how they manage to reconcile these views.

[...]

> A good sandbox seems to be a real adventure with few survivors, as can be seen in the
> JavaScript-world.

Certainly, there are interesting directions to be taken with safe
execution at the language and runtime levels, but as technologies like
Java (in particular) have shown, it's possible for a project or a
company to find itself focusing heavily on such strategies at the cost
of readily available, mature technologies which might be good enough.
The emergence of virtualisation as a commodity technology would suggest
that sandboxing language runtimes isn't as fashionable as it was ten
years ago.

Paul



From pavlovevidence at gmail.com  Wed Nov  1 06:30:50 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 1 Nov 2006 03:30:50 -0800
Subject: Where do nested functions live?
In-Reply-To: <mailman.1390.1162022770.11739.python-list@python.org>
References: <pan.2006.10.28.07.56.22.854398@REMOVE.THIS.cybersource.com.au>
	<mailman.1390.1162022770.11739.python-list@python.org>
Message-ID: <1162380650.448023.201430@e64g2000cwd.googlegroups.com>


Ben Finney wrote:
> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:
>
> > I defined a nested function:
> >
> > def foo():
> >     def bar():
> >         return "bar"
> >     return "foo " + bar()
> >
> > which works. Knowing how Python loves namespaces, I thought I could
> > do this:
> >
> > >>> foo.bar()
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > AttributeError: 'function' object has no attribute 'bar'
> >
> > but it doesn't work as I expected.
>
> Functions don't get attributes automatically added to them the way
> class do. The main exception is the '__doc__' attribute, referring to
> the doc string value.
>
> > where do nested functions live?
>
> They live inside the scope of the function. Inaccessible from outside,

Not so fast. You can get at the nested function by peeking inside code
objects (all bets off for Pythons other than CPython).

import new
def extract_nested_function(func,name):
    codetype = type(func.func_code)
    for obj in func.func_code.co_consts:
        if isinstance(obj,codetype):
            if obj.co_name == name:
                return new.function(obj,func.func_globals)
    raise ValueError("function with name %s not found in %r"
        % (name,func))


Not exactly something I'd recommend for ordinary usage, but it can be
done.


Carl Banks



From fredrik at pythonware.com  Tue Nov 14 11:27:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 17:27:23 +0100
Subject: another newbie question
In-Reply-To: <4559E234.7060309@iop.kcl.ac.uk>
References: <4559E234.7060309@iop.kcl.ac.uk>
Message-ID: <ejcqpa$34m$1@sea.gmane.org>

Mary Jane Boholst wrote:

> I am trying to upload a file to a database using a (cgi) form and am
> having trouble doing this. I think that I need some way of escaping the
> file contents or making it so that mysql/python (not sure which) will
> ignore the files actual contents and store it in the db regardless of
> what is actually in the file.

http://effbot.org/pyfaq/how-do-i-escape-sql-values-when-using-the-db-api

</F>



From hg at nospam.com  Sat Nov 18 11:09:26 2006
From: hg at nospam.com (hg)
Date: Sat, 18 Nov 2006 10:09:26 -0600
Subject: Free Decompiler
In-Reply-To: <1163864826.030264.306370@m73g2000cwd.googlegroups.com>
References: <1163864826.030264.306370@m73g2000cwd.googlegroups.com>
Message-ID: <HfG7h.2506$rn1.1025@newsfe19.lga>

jim wrote:
> where can I find a free decompile that I can run in windows xp
> 

Hey Jim, where can you find a free "decompile" that you can run in
windows xp ?

hg


From fredrik at pythonware.com  Fri Nov 10 14:51:27 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 10 Nov 2006 20:51:27 +0100
Subject: SyntaxError: Invalid Syntax.
References: <1163178099.156160.29280@k70g2000cwa.googlegroups.com><1163178336.281812.140580@f16g2000cwb.googlegroups.com><1163178581.231837.18120@h48g2000cwc.googlegroups.com><ej2ce8$vsc$1@cernne03.cern.ch>
	<1163179622.691812.96170@h48g2000cwc.googlegroups.com>
Message-ID: <ej2l80$hof$1@sea.gmane.org>

"ronrsr" <ronrsr at gmail.com> wrote:

> the exact code that is triggering the error message is:
>
> zc = zsql.connect()

individual statements don't "trigger" syntax errors; they're compiler 
errors, and only
appear when do something that causes code to be compiled.

> exact error message:  SyntaxError:  Invalid Syntax

a complete syntax error usually includes a traceback:

Traceback (most recent call last):
  File "program.py", line 1, in <module>
    import module
  File "module.py", line 25
    if 1
       ^
SyntaxError: invalid syntax

what does the traceback look like in your case?

</F> 





From skip at pobox.com  Fri Nov  3 11:38:50 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 3 Nov 2006 10:38:50 -0600
Subject: Tools for Java/Python scripting
In-Reply-To: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>
References: <1162569614.650081.166270@h48g2000cwc.googlegroups.com>
Message-ID: <17739.28826.871772.921250@montanaro.dyndns.org>


    steve> http://wiki.python.org/moin/Java_Scripting

Renamed to "JavaScripting".

Skip


From carsten at uniqsys.com  Fri Nov 17 17:00:29 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Nov 2006 17:00:29 -0500
Subject: Decimal() instead of float?
In-Reply-To: <1163800304.5107.179.camel@pepper>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper> <4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org> <1163794251.5107.151.camel@pepper>
	<ejl5s5$334$1@sea.gmane.org>  <1163800304.5107.179.camel@pepper>
Message-ID: <1163800829.3358.36.camel@dot.uniqsys.com>

On Fri, 2006-11-17 at 16:51 -0500, Michael B. Trausch wrote:
> [...]
> Let's say that I want to work with the latitude 33.6907570.  In
> Python, that number can not be stored exactly without the aid of
> decimal.Decimal().
> 
> >>> 33.6907570
> 33.690756999999998

You say that like it's Python's fault. Can this number be stored
*exactly* in C?

-Carsten




From gagsl-py at yahoo.com.ar  Mon Nov 13 17:19:59 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 19:19:59 -0300
Subject: Python app links in windows
In-Reply-To: <000001c7076d$5de84000$9f0bf70a@lasp.colorado.edu>
References: <4558DBEF.8010409@hobbshouse.org>
	<000001c7076d$5de84000$9f0bf70a@lasp.colorado.edu>
Message-ID: <7.0.1.0.0.20061113191323.03e99b88@yahoo.com.ar>

At Monday 13/11/2006 18:47, Bryce Bolton wrote:

>My question is:  How do the contents of the link file get passed to the
>python application assocated with .PAL files?  Are the file contents passed
>as an ARGV array?  There must be more to this because when I open a file
>like some_doc.XLS, the entire contents of that file get passed to Excel, but
>I don't know how.

When you register your application to handle .PAL files, you specify 
the command line to be used; usually it is "executable" "%1"
So, your application receives the file name (not its contents!) as an 
argument; see sys.argv[]


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From codecraig at gmail.com  Mon Nov 20 10:34:08 2006
From: codecraig at gmail.com (abcd)
Date: 20 Nov 2006 07:34:08 -0800
Subject: pysqlite -- anyone have the windows installer for Python 2.4?
In-Reply-To: <1164033134.866114.182320@h54g2000cwb.googlegroups.com>
References: <1164033134.866114.182320@h54g2000cwb.googlegroups.com>
Message-ID: <1164036848.158157.279340@j44g2000cwa.googlegroups.com>

nevermind I found the pyd and pyc i needed.

thanks anyway



From writeson at charter.net  Sat Nov  4 21:41:03 2006
From: writeson at charter.net (writeson)
Date: 4 Nov 2006 18:41:03 -0800
Subject: Pyro stability
Message-ID: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>

Hi all,

At work I'm considering proposing a solution for our distributed
processing system (a web based shopping cart that feeds an actual
printing production line) based on Pyro. I've done some minor
experiments with this and Pyro looks interesting and like a good
implementation of what I want. I've got a couple of questions though:

1)  Has anyone had any experience with Pyro, and if so, have you had
any stability, or memory use issues running Pyro servers or nameservers
on the various participating computers? (We have a mixed environment of
Linux and Windows, but will be heading to an all Linux (RedHat)
environment soon.

2)  One of the guys I work with is more inclined to set up XMLRPC
communication between the processes, and he is also leery of running
daemon processes. His solution is to have essentially Python CGI code
that responds to the various XMLRPC requests. Does anyone have any
opinions on this? I know what mine are already. :)

3)  I've considered using CORBA, which is more powerful, and certainly
faster, but it's complexity to set up compared to the rather simple
work I'm trying to do seems prohibative. Does anyone have any thoughts
on this?

Thanks in advance,
Doug



From beliavsky at aol.com  Wed Nov 22 08:38:38 2006
From: beliavsky at aol.com (Beliavsky)
Date: 22 Nov 2006 05:38:38 -0800
Subject: Quadratic Optimization Problem
References: <1164152033.306124.126290@e3g2000cwe.googlegroups.com>
	<45640704$0$5711$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <1164202718.522744.71060@e3g2000cwe.googlegroups.com>

Stefan Behnel wrote:
> amitsoni.1984 at gmail.com wrote:
> > I need to do a quadratic optimization problem in python where the
> > constraints are quadratic and objective function is linear.
> >
> > What are the possible choices to do this.
>
> Too bad these homework assignments get trickier every time, isn't it?

I think this sarcasm is unjustified. It is not obvious to me that this
is a homework assignment.

The problem where constraints are linear and the objective function is
linear (quadratic) is known as linear (quadratic) programming, and
there are specialized codes for these problems. I don't know of
software in any language for the particular problem of a linear
objective function with quadratic constraints, so I would use a general
algorithm for nonlinearly constrained optimization. Maybe CVXOPT
http://www.ee.ucla.edu/~vandenbe/cvxopt/ will work for the OP -- I have
not tried it.

The site http://www.solver.com/probconic.htm calls the problem "conic
optimization".

A good newsgroup to ask about optimization algorithms is
sci.math.num-analysis.



From martinskou at gmail.com  Tue Nov 14 14:56:40 2006
From: martinskou at gmail.com (martinskou at gmail.com)
Date: 14 Nov 2006 11:56:40 -0800
Subject: multi split function taking delimiter list
Message-ID: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>

Hi, I'm looking for something like:

multi_split( 'a:=b+c' , [':=','+'] )

returning:
['a', ':=', 'b', '+', 'c']

whats the python way to achieve this, preferably without regexp?

Thanks.

Martin



From ptmcg at austin.rr._bogus_.com  Thu Nov 30 14:34:04 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 30 Nov 2006 19:34:04 GMT
Subject: Is there an easier way to express this list slicing?
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
Message-ID: <MmGbh.10434$Gk5.6762@tornado.texas.rr.com>

"John Henry" <john106henry at hotmail.com> wrote in message 
news:1164913125.509492.54060 at 79g2000cws.googlegroups.com...
> If I have a list of say, 10 elements and I need to slice it into
> irregular size list, I would have to create a bunch of temporary
> variables and then regroup them afterwords, like:
>
> # Just for illustration. Alist can be any existing 10 element list
> a_list=("",)*10
> (a,b,c1,c2,c3,d1,d2,d3,d4,d5)=a_list
> alist=(a,)
> blist=(b,)
> clist=(c1,c2,c3)
> dlist=(d2,d3,d4,d5)
>
> That obviously work but do I *really* have to do that?
>
> BTW: I know you can do:
> alist=a_list[0]
> blist=a_list[1]
> clist=a_list[2:5]
> dlist=a_list[5:]
>
> but I don't see that it's any better.

The slicing notation is about the best general solution.

If you are doing this a lot, you should write some sort of "break up the 
list function".  Here's one that takes a list of list lengths to break the 
list into.

-- Paul


def splitUp(src,lens):
    ret = []
    cur = 0
    for var,length in varmap:
        if length is not None:
            ret.append( a_list[cur:cur+length] )
            cur += length
        else:
            ret.append( a_list[cur:] )
    return ret


origlist = list("ABCDEFGHIJ")
alist, blist, clist, dlist = splitUp( origlist, (1,1,3,None) )
print alist, blist, clist, dlist

Prints
['A'] ['B'] ['C', 'D', 'E'] ['F', 'G', 'H', 'I', 'J']




From apardon at forel.vub.ac.be  Wed Nov 15 02:46:34 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Nov 2006 07:46:34 GMT
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
	<mailman.0.1163325764.32031.python-list@python.org>
	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>
	<1163378573.018479.261660@b28g2000cwb.googlegroups.com>
	<1163559479.415682.138010@k70g2000cwa.googlegroups.com>
	<mailman.179.1163560927.32031.python-list@python.org>
Message-ID: <slrnellheq.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-15, Robert Kern <robert.kern at gmail.com> wrote:
> Dustan wrote:
>
>> 2. While I haven't taken a good look at NumPy, my intuition tells me it
>> won't work with complex data types, which wouldn't work for me at all.
>> 
>> Am I correct on that second one?
>
> No. numpy can make arrays of Python objects in addition to arrays of double,
> unsigned int, etc.

Does numpy still gain you much if you have arrays of Python objects?

-- 
Antoon Pardon


From fredrik at pythonware.com  Wed Nov  1 08:55:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 14:55:40 +0100
Subject: report progress from C function
In-Reply-To: <20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>
References: <1162336313.895048.202440@k70g2000cwa.googlegroups.com>
	<20061101135354.39489.qmail@web88312.mail.re4.yahoo.com>
Message-ID: <eia90r$d4d$1@sea.gmane.org>

Michael S wrote:

> I downloaded Pyrex and ran it through their own
> example. The code looks quite messy, and I even saw a
> few "goto"s. 

looked at the assembler output from your C compiler lately?

</F>



From jeff at taupro.com  Mon Nov 27 04:43:53 2006
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 27 Nov 2006 03:43:53 -0600
Subject: Announcing: Keynote Speakers for PyCon 2007
Message-ID: <456AB359.4080106@taupro.com>

The PyCon organizers would like to announce the slate of keynote speakers who 
have accepted our invitation to speak at PyCon 2007!

PyCon 2007 is taking place in Addison (Dallas), Texas on Feb 23-25 2007.

For photos, biographies and more, check out:

   http://us.pycon.org/TX2007/Keynotes


Ivan Krsti? (speaking Friday AM)
Topic: "The Python machine: Python and One Laptop per Child"

Adele Goldberg (speaking Saturday AM)
Topic: TBD (probably something related to Zope 3 and Education)

Guido van Rossum (speaking Saturday Lunch)
Topic: "Python 3000"

Robert M. Lefkowitz ("r0ml") (speaking Sunday AM)
Topic: "The Importance of Programming Literacy"

-Jeff
Co-Chair PyCon 2007


From arkanes at gmail.com  Tue Nov 21 18:25:44 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Nov 2006 17:25:44 -0600
Subject: Is time.time() < time.time() always true?
In-Reply-To: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
Message-ID: <4866bea60611211525p1b67c948r3948abe2b8f2b3b7@mail.gmail.com>

On 21 Nov 2006 15:10:25 -0800, flamesrock <flamesrock at gmail.com> wrote:
> So, I was blazin' some mad chronix, as they say, and got on to thinking
> about Python.
>
> The question was, is the statement:
>
> time.time() < time.time()
>
> always true? Seems it should be false, since the statement itself
> occurs at one time instant.. but of course we know that python doesn't
> execute code that way.. So my question is, why doesn't Python work this
> way?
>

This would only be false if the time between the 2 calls was less than
the precision of the OS call that time.time uses.


From fredrik at pythonware.com  Fri Nov 24 13:14:03 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 24 Nov 2006 19:14:03 +0100
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164388781.646461.70740@j44g2000cwa.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>	<4sol7hF10ii6eU1@mid.individual.net>
	<1164388781.646461.70740@j44g2000cwa.googlegroups.com>
Message-ID: <ek7cpc$u8a$1@sea.gmane.org>

Jim wrote:

> Application abc is designed as a complete module.  The user is to
> script their own functions to work with application abc.

so use execfile() with a prepared namespace:

     namespace = { ...stuff to export to the module ... }
     execfile("directory/module.py", namespace)

</F>



From shea at null.net  Mon Nov  6 12:23:25 2006
From: shea at null.net (Shea Martin)
Date: Mon, 06 Nov 2006 17:23:25 GMT
Subject: missing collections module
Message-ID: <hcK3h.15398$cz.249447@ursa-nb00s0.nbnet.nb.ca>

I am getting this error in a python script:

   File "/usr/sfw/lib/python2.3/site-packages/BTL/cache.py", line 12, in ?
     from collections import deque
ImportError: No module named collections

Where can I download the python collection module?  I am no python 
programmer, but I can build/install python packages if I know where to 
get them.

Thanks,

~S


From fredrik at pythonware.com  Thu Nov 23 03:11:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 09:11:19 +0100
Subject: Abelson and Python
In-Reply-To: <1164246961.951287.132170@j44g2000cwa.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164246961.951287.132170@j44g2000cwa.googlegroups.com>
Message-ID: <ek3l38$19m$4@sea.gmane.org>

markscottwright wrote:

 > If it were that easy, the PyPy guys would be done by now.

if the PyPy guys had focused on writing a Python interpreter in Python, 
they'd been done by now.

</F>



From bearophileHUGS at lycos.com  Thu Nov 30 18:49:14 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Nov 2006 15:49:14 -0800
Subject: best way to align words?
In-Reply-To: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
Message-ID: <1164930554.608614.280060@l12g2000cwl.googlegroups.com>

Robert R.:
> i would like to write a piece of code to help me to align some sequence
> of words and suggest me the ordered common subwords of them [...]
> a trouble i have if when having many different strings my results tend
> to be nothing while i still would like to have one of the, or maybe,
> all the best matches.

This is my first solution try, surely there are faster, shorter, better
solutions...


from collections import defaultdict
from itertools import chain
from graph import Graph
# http://sourceforge.net/projects/pynetwork/

def commonOrdered(*strings):
    lists = [[w for w in string.lower().split() if w.isalpha()] for
string in strings]

    freqs = defaultdict(int)
    for w in chain(*lists):
        freqs[w] += 1

    g = Graph()
    for words in lists:
        g.addPath(words)

    len_strings = len(strings)
    return [w for w in g.toposort() if freqs[w]==len_strings]


s0 = "this is an example of a thing i would like to have"
s1 = "another example of something else i would like to have"
s2 = 'and this is another " example " but of something ; now i would
still like to have'

print commonOrdered(s0, s1, s2)

It creates a graph with the paths of words, then sorts the graph
topologically, then takes only the words of the sorting that are
present in all the original strings.
With a bit of work the code can be used if it contains words like
"example" instead of " example ".
An xtoposort method too can be added to the Graph class...

Bye,
bearophile



From sjmachin at lexicon.net  Sun Nov  5 17:40:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 5 Nov 2006 14:40:54 -0800
Subject: Awesome Python Information
In-Reply-To: <DSs3h.5716$lx6.4779@tornado.texas.rr.com>
References: <1162753631.297470.315570@m7g2000cwm.googlegroups.com>
	<DSs3h.5716$lx6.4779@tornado.texas.rr.com>
Message-ID: <1162766454.527138.272980@k70g2000cwa.googlegroups.com>


Paul McGuire wrote:
> "Brandon" <Lion623 at mail.com> wrote in message
> news:1162753631.297470.315570 at m7g2000cwm.googlegroups.com...
> > Check out: www.ChezBrandon.com
> >
> By which he means, "do NOT waste your time checking out this ridiculous
> website with absolutely no Python whatever anywhere."
> (This is the idiot who claims he saved the Congress from some Mossad poison
> gas attack, or whatever.)
>
> -- Paul

Nothing to do with Python?

1. Mossad is an agency of the state of Israel.
2. Some Israelis have long curly hair and wear big black hats.
3. Guy Fawkes and his co-conspirators in the alleged attempt to blow up
the House of Lords in 1606 had long curly hair and wore big black hats.
4. Fawkes signed his name 'Guido".

Q.E.D.



From grante at visi.com  Wed Nov 29 14:59:39 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Nov 2006 19:59:39 -0000
Subject: pickle and infinity
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
	<mailman.844.1164823762.32031.python-list@python.org>
	<1164824790.211227.305300@14g2000cws.googlegroups.com>
Message-ID: <12mrplbrrn4il70@corp.supernews.com>

On 2006-11-29, Bart Ogryczak <B.Ogryczak at gmail.com> wrote:
>
> Fredrik Lundh wrote:
>> Bart Ogryczak wrote:
>>
>> > I?ve got this problem with pickle, it seems it doesn?t handle
>> > correctly infinite values (nor does Python return overflow/underflow
>> > error).
>>
>> Python 2.X relies on the C library to serialize floats, and, as you've
>> noticed, some C libraries can produce values that they themselves cannot
>> read.
>
> Actually I?d be very happy, if Python would throw FloatPointExeption,
> rather then allow infinite values.

I'd be very unhappy.  I use both NaNs and infinities in many
programs, so it needs to be selectable should that feature be
added.

> Haven?t got idea how to do it. fpectl would do the trick, but
> it?s not present nither on Solaris, nor on Windows platform.
> And I?d need it on both.

In my experience anything than needs to be portable and
involves NaN, inf, or denormals is rather painful.

-- 
Grant Edwards                   grante             Yow!  I wish I was a
                                  at               sex-starved manicurist
                               visi.com            found dead in the Bronx!!


From utabintarbo at gmail.com  Thu Nov 30 13:16:15 2006
From: utabintarbo at gmail.com (utabintarbo)
Date: 30 Nov 2006 10:16:15 -0800
Subject: Threading
In-Reply-To: <mailman.884.1164901063.32031.python-list@python.org>
References: <mailman.884.1164901063.32031.python-list@python.org>
Message-ID: <1164910575.826439.289130@l12g2000cwl.googlegroups.com>


Gheorghe Postelnicu wrote:
>...
> However, my question regards killing the actual children threads -
> they are spending lots of time in system calls, so I cannot insert
> some while loop in a derived Thread class.
>
> Any suggestions would be apreciated.
>
Have the threads look for a semaphore file. If it exists, they delete
it and die.

Just an idea....HTH



From nospam at domain.tld  Thu Nov 16 06:59:31 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 16 Nov 2006 12:59:31 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
Message-ID: <ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>

timmy <"timothy at open-networks.net"> wrote:

This sub-thread starts to become a flame-war, isn't it? Calm down, both of
you... No need to fight, when only some ideas for a technical question are
requested.

> as posted before, linux kernel limit.
> 
> then you and your users can go as crazy as you want and you won't take
> out your system.

The problem with linux kernel limits are, that they won't work really good
on MacOSX and Windows... OTOH the idea is the right one, but the effect can
be achieved inside of Python. Since Python does byte compile the code and
the interpreter evaluates each byte code token in one evaluation step. The
interpreter could be extended for such usecases to count and limit the
number of evaluation steps allowed for untrusted script or methods in
untrusted script as well as to limit the recursion depth or memory to be
allocated. All those limits are managed by the interpreter for script code
and hence can be limited for untrusted code by the interpreter. This also
does not really make DoS impossible (what about C extensions? - maybe
restricting "import"?). - As I said before in this thread, making a sandbox
really secure is a hard job, and may need some serious changes in the
Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
to have.

Regards
Stephan



From mail at microcorp.co.za  Mon Nov 20 09:56:50 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 16:56:50 +0200
Subject: rpncalc-2.5 RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com><mailman.491.1164004338.32031.python-list@python.org>
	<1164009539.310173.248620@m7g2000cwm.googlegroups.com>
Message-ID: <000201c70d24$b19eb320$03000080@hendrik>

"John Machin" <sjmachin at lexicon.net> WROTE:

> Hendrik van Rooyen wrote:
> > "Raymond L. Buvel" <levub137 at wi.rr.com> wrote:
> >
> >
> > > The rpncalc package adds an interactive Reverse Polish Notation (RPN)
> >
> > Can anyone remember who the Pole was and how his name is spelled?
> >
> > (no fair googling)
> 
> Remember who: yes
> Remember spelling: you must be joking; however I do remember that the
> name is given in Knuth TAOCP vol 3 as a test case for the soundex
> algorithm.
> 
> name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
> :-)
> 
> The first letter is LATIN CAPITAL LETTER L WITH STROKE.

Thanks - I find it disgusting that I am completely unable to remember this - 

If his name had been Smith or Jones it would be no problem,
but just because there are a few too many consonants for me 
to handle, it is as if there is a total black hole...

- Hendrik




From laurent.pointal at limsi.fr  Thu Nov 30 08:56:00 2006
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 30 Nov 2006 14:56:00 +0100
Subject: PythonTidy
In-Reply-To: <ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
	<ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
Message-ID: <ekmo6g$9c4$1@upsn250.cri.u-psud.fr>

Laurent Pointal a ?crit :

> See http://www.python.org/dev/peps/pep-0263/

Aye, sorry for my missreading...

[seem I hurt the emacs guy]



From phil at riverbankcomputing.co.uk  Sun Nov  5 08:36:58 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 5 Nov 2006 13:36:58 +0000
Subject: ANN: PyQt v4.1 Released
Message-ID: <200611051336.58334.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of PyQt v4.1
available from http://www.riverbankcomputing.co.uk/pyqt/.

The highlights of this release include:

- support for Qt v4.2 including QGraphicsView and related classes, the undo
  framework, widget stylesheets, and integration with GNOME (both visually and
  the event loop)
- the addition of the QtTest module for automated GUI testing
- the addition of the QAxContainer module for Windows for integrating ActiveX
  controls.

PyQt is a comprehensive set of Qt bindings for the Python programming language 
and supports the same platforms as Qt (Windows, Linux and MacOS/X).  Like Qt, 
PyQt is available under the GPL and a commercial license.

See http://www.riverbankcomputing.com/Docs/PyQt4/html/classes.html for the 
class documentation.

PyQt v4 supports Qt v4 (http://www.trolltech.com/products/qt/index.html).  
PyQt v3 is still available to support earlier versions of Qt.

PyQt v4 is implemented as a set of 10 extension modules containing 
approximately 400 classes and 6,000 functions and methods.

    QtCore
    The non-GUI infrastructure including event loops, threads, i18n, Unicode,
    signals and slots, user and application settings.

    QtGui
    A rich collection of GUI widgets.

    QtNetwork
    A set of classes to support TCP and UDP socket programming and higher
    level protocols (eg. HTTP).

    QtOpenGL
    A set of classes that allows PyOpenGL to render onto Qt widgets.

    QtSql
    A set of classes that implement SQL data models and interfaces to industry
    standard databases.  Includes an implementation of SQLite.

    QtSvg
    A set of classes to render SVG files onto Qt widgets.

    QtTest
    A set of classes to automate unit testing of PyQt applications and GUIs.

    QtXML
    A set of classes that implement DOM and SAX parsers.

    QtAssistant
    A set of classes that enables the Qt Assistant online help browser to be
    integrated with an application.

    QAxContainer
    A set of classes for Windows that allows the integration of ActiveX
    controls and COM objects.

A Windows installer is provided for the GPL version of PyQt to be used with 
the GPL version of Qt v4 (http://www.trolltech.com/download/qt/windows.html). 
It enabes a complete PyQt environment to be installed on Windows without the 
need for a C++ compiler.

PyQt includes the pyuic utility which generates Python code to implement user 
interfaces created with Qt Designer in the same way that the uic utility 
generates C++ code.  It is also able to load Designer XML files dynamically.

Phil


From boggom at comcast.net  Mon Nov 20 14:17:41 2006
From: boggom at comcast.net (boggom at comcast.net)
Date: 20 Nov 2006 11:17:41 -0800
Subject: Looking for a graph (as in network, nodes) package
In-Reply-To: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
References: <1163985754.768937.132890@h54g2000cwb.googlegroups.com>
Message-ID: <1164050261.317752.247330@k70g2000cwa.googlegroups.com>

John,  networkx at networkx.lanl.gov


John Henry wrote:
> I am looking for a ready made simple graph package.



From stefan.behnel-n05pAM at web.de  Mon Nov 13 12:34:36 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 13 Nov 2006 18:34:36 +0100
Subject: jython's future (was: Python development time is faster.)
In-Reply-To: <4rrjenFspqicU2@mid.uni-berlin.de>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>
	<4rrjenFspqicU2@mid.uni-berlin.de>
Message-ID: <4558ACAC.1030001@web.de>

Diez B. Roggisch wrote
> I wouldn't consider jython abandonware. It is under active development, and
> I'm using a 2.2 alpha successful for quite a while now - which usually
> serves my needs.
> 
> The problem is/was that new-style classes were a major hurdle to take, and
> this now seems to be conquered. So lets hope (or contribute code....:P)
> that jython will see a 2.4 version ASAP.

The jython project currently deploys a pretty cathedral-ish development style,
pretty much hidden from broader audiences. FWIW, it seems to be stuck in
trying to get out a 2.2 compliant release first, then to provide a 2.3
compliant version (at least, there's a branch for it). Guess it's a question
of human resources, but personally, I wouldn't care too much about
compatibility and just let people go and implement whatever feature they want
to be in on the way towards something as close to 2.5 (or maybe 2.4, why not)
as possible. Honestly, how many important Python modules do still run on 2.2?
Most switched to at least 2.3 quite a while ago.

After all, it's the compatible *software* that makes the difference, not the
platform. It's easier to say: "hey, this feature is lacking to make my program
run" than: "let's see, what else is there in that outdated specification to
implement?". And it's a lot more encouraging, too.

Just my little rant on this one ...

Stefan


From gagsl-py at yahoo.com.ar  Sun Nov 19 22:22:16 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 00:22:16 -0300
Subject: a few extensions for the itertools
In-Reply-To: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
References: <4560bfb0$0$10578$3b214f66@tunews.univie.ac.at>
Message-ID: <7.0.1.0.0.20061120001703.03dc8e50@yahoo.com.ar>

At Sunday 19/11/2006 17:35, Mathias Panzenboeck wrote:

>I wrote a few functions which IMHO are missing in python(s itertools).
>
>You can download them here:
>http://sourceforge.net/project/showfiles.php?group_id=165721&package_id=212104
>
>isum(iterable, start=0) -> value
>         Returns the sum of the elements of a iterable
>         plus the value of parameter 'start'.  When the
>         iterable is empty, returns start.

Isn't the same as the builtin sum?

>iproduct(iterable, start=0) -> value

As others said, start should be 1

>fcain(funct,*functs) -> function(...,***)
>         fcain(f1,f2,...,fn)(*args,*kwargs) equals 
> f1(f2(...fn(*args,*kwargs)))

I don't understand it, nor even the signature. Perhaps it tries to be 
"fchain", function composition? But what has it to do with iterables?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From bignose+hates-spam at benfinney.id.au  Sun Nov 12 18:47:30 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 13 Nov 2006 10:47:30 +1100
Subject: Random image text generation?
References: <17751.32120.390405.253158@montanaro.dyndns.org>
Message-ID: <8764dki5wt.fsf@benfinney.id.au>

skip at pobox.com writes:

> Is there a module out there that will generate an image with a random text
> string such as the confirmation images you see on various websites?

The W3C recommends more-accessible alternatives to vision-based CAPTCHAs:

    <URL:http://www.w3.org/TR/turingtest/>

-- 
 \       "A free society is one where it is safe to be unpopular."  -- |
  `\                                             Adlai Ewing Stevenson |
_o__)                                                                  |
Ben Finney



From nslater at gmail.com  Sun Nov 26 19:16:34 2006
From: nslater at gmail.com (Noah Slater)
Date: 26 Nov 2006 16:16:34 -0800
Subject: The Python Papers Edition One
In-Reply-To: <mailman.722.1164489213.32031.python-list@python.org>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164471238.033790.243890@14g2000cws.googlegroups.com>
	<mailman.722.1164489213.32031.python-list@python.org>
Message-ID: <1164586594.649105.282020@h54g2000cwb.googlegroups.com>

I do not think this thread is an embarrassment to the community. I
think it speaks volumes about people's commitment to free software.

While we can applaud such contributions it is no excuse to waiver on
one's ethics and principles.

Regardless of content, or even format, if the Python Papers are not
free as per the FSF's definition they are encumbered.

I am hoping that the author/publishers will reconsider the choice of
licencing.

As an aside, I keep seeing people refer to the CC licences as if they
were all comparable with each other.

This is incorrect. Each licence is very different and saying something
is licenced with a CC licence says absolutely nothing.

http://www.fsf.org/blogs/rms/entry-20050920.html
http://www.linuxp2p.com/forums/viewtopic.php?p=10771



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 24 11:36:33 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 24 Nov 2006 17:36:33 +0100
Subject: NFS server
References: <1164373253.607159.26260@j44g2000cwa.googlegroups.com>
Message-ID: <4solchF10ii6eU2@mid.individual.net>

srj wrote:

> i wish to develop an NFS server usin python from scratch( some
> wise guy told me i'ts easy!).

That wise guy must be very wise, or stupid 8)

> can i get any kinda tutorial for this??
> 
> any suggestions on how 2 begin?

- Read RFCs about NFS
- Read the Python tutorial
- If you want it even easier, read the Twisted tutorial additionally

Regards,


Bj?rn

-- 
BOFH excuse #279:

The static electricity routing is acting up...



From jhefferon at smcvt.edu  Thu Nov 16 08:48:12 2006
From: jhefferon at smcvt.edu (Jim)
Date: 16 Nov 2006 05:48:12 -0800
Subject: deciding what is a dir (folder) in a zip file
Message-ID: <1163684892.073310.195950@k70g2000cwa.googlegroups.com>

Hello,

I'm trying to read .zip files and drop from the listing those files
that are directories.  I'm using the zipfile module.

Does anyone know how I can I tell which files in the .zip are
directories?  I have looked around the net for the information but I
cannot make it out: the pkzip specification hints that it is in the
"external file attribute" but also hints that it is dependent on the
platform on which the .zip was made (I get .zips from lots of
platforms).  The info-zip mailing list is unfortunately swamped by
spam, so I can't ask there.  Googling has increased my suspicion that
it is not just a matter of seeing if the file name ends in '/' and that
the relevant external file attribute seems to have different values for
people from different platforms, so just experimenting on my platform
doesn't seem to be a safe solution.

(I could os.system("unzip "+fn) and search the disk for directories but
I'd rather not, for reasons I won't list.)

I'd be grateful for any help,
Jim



From sjmachin at lexicon.net  Mon Nov 20 19:12:29 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 16:12:29 -0800
Subject: trying to create a dictionary in python,
	using variables as a value
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
	<1164016765.497299.193830@b28g2000cwb.googlegroups.com>
	<mailman.501.1164017706.32031.python-list@python.org>
Message-ID: <1164067949.132528.93990@h54g2000cwb.googlegroups.com>

Fredrik Lundh wrote:
> John Machin wrote:
>
> > On this one what? It would help very much if you showed the one
> > statement that is getting the syntax error.
>
> on which statement does he *not* get a syntax error?
>

A clarification:

The first statement *contains* two syntax errors. There are various
others sprinkled throughout what he has seemingly typed in with
presumably explanatory intent.

Even if that were in fact his source file, he would only *get* one
Syntax Error *message*. Python evidently has inherited its error
handling from Dijkstra's first Algol 60 compiler, which according to
legend, had a similar modus operandi.

HTH,
John



From mail at microcorp.co.za  Sun Nov 19 02:25:05 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 19 Nov 2006 09:25:05 +0200
Subject: basic python questions
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com><18C7h.72$_H5.25@tornado.texas.rr.com>
	<1163862527.042015.63400@k70g2000cwa.googlegroups.com>
Message-ID: <00aa01c70bab$d6234fa0$03000080@hendrik>

<nateastle at gmail.com> wrote:


> I am currently going to school at Utah Valley State College, the course
> that I am taking is analysis of programming languages. It's an upper
> division course but our teacher wanted to teach us python as part of

what does "upper division" mean in this context ?  I am unfamiliar with the
term.

- Hendrik





From fredrik at pythonware.com  Mon Nov 20 14:29:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 20:29:43 +0100
Subject: SOAP example (getting stock price) - verifying endpoint url
In-Reply-To: <1164050320.538688.194810@j44g2000cwa.googlegroups.com>
References: <1164050320.538688.194810@j44g2000cwa.googlegroups.com>
Message-ID: <ejsvn8$h9r$1@sea.gmane.org>

mirandacascade at yahoo.com wrote:

> Is it possible that the endpoint url of:
> 
> "http://66.28.98.121:9090/soap"
> 
> that is provided for the SOAP example of calling GetQuote has changed
> or is no longer in use?  If it has changed, what is the new endpoint
> url?

the script describes the service as "delayed stock quote demo" from 
"www.xmethods.net", which shouldn't be too hard to locate on the net.

...

their site now lists the endpoint as:

     http://64.124.140.30:9090/soap

why they insist on using numerical host addresses is more than I can tell...

</F>



From st911 at rock.com  Thu Nov 30 11:48:00 2006
From: st911 at rock.com (st911 at rock.com)
Date: 30 Nov 2006 08:48:00 -0800
Subject: *** DONT HESITATE TO SUE THE OFFICIAL BASTARDS IN THE GOVERNMENT,
	FEDERAL, STATE OR CITY ***
Message-ID: <1164905280.276407.10870@80g2000cwy.googlegroups.com>

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

He and his family later sued the U.S. government for damages.

"We lived in 1984," Mayfield told reporters Wednesday. "I'm talking
about the George Orwell, frightening brave new world in which Big
Brother is constantly watching you." (Watch Mayfield discuss the case
Video)

"I, myself, have dark memories of stifling paranoia, of being
monitored, followed, watched, tracked," he said, choking back emotion.

"I've been surveilled, followed, targeted primarily because I've been
an outspoken critic of this administration and doing my job to defend
others who can't defend themselves, to give them their day in court,
and mostly for being a Muslim."

The government refused, he said, to tell him where they put their
cameras and surveillance devices, leaving his family wondering if their
private conversations and intimate moments were on display.

"The days and weeks and months following my arrest were some of the
hardest and darkest that myself and my family have ever had to endure,"
he said.

"And all because of this government's ill-conceived war on terror. ...
What I really want is for this not to happen to anyone else."

Wednesday's settlement includes not only a $2 million payment and an
apology, but also an agreement by the government to destroy
communications intercepts conducted by the FBI against Mayfield's home
and office during the investigation.

The written apology reads:

"The United States of America apologizes to Mr. Brandon Mayfield and
his family for the suffering caused by the FBI's misidentification of
Mr. Mayfield's fingerprint and the resulting investigation of Mr.
Mayfield, including his arrest as a material witness in connection with
the 2004 Madrid train bombings and the execution of search warrants and
other court orders in the Mayfield family home and in Mr. Mayfield's
law office."

A Justice Department statement released Wednesday said Mayfield was not
targeted because of his Muslim faith and that the FBI had taken steps
to improve its fingerprint identification process "to ensure that what
happened to Mr. Mayfield does not happen again."

"Mr. Mayfield and his family felt it was in their best interest to get
on with their lives," said Mayfield's attorney, Elden Rosenthal.

"No amount of money can compensate Mr. Mayfield for being held as a
prisoner and being told he faced the death penalty [for the Madrid
bombings]."

Mayfield said his suit was not about money.

"It's about regaining our civil rights, our freedom and most important,
our privacy," he said.

He and his attorneys said the settlement will allow him to continue the
portion of his lawsuit challenging the constitutionality of the Patriot
Act.

Mayfield contends that his home was searched under provisions of the
Patriot Act.

====================================================================

Criminal, Rogue and RACIST elements have penetrated all the branches of
USA and world governments. We know that on 911 FBI bastards ran all
over in the neighborhood of Pentagon trying to  confiscate EVIDENCE of
the 911 crime that no Boeing Passenger Airliner hit Pentagon. They have
stil not released the evidence. 911 was inside job.

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, Mossad, PENTAGON AND THE WHITE HOUSE. Dont
forget that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

FBI is the BEST of the criminal branches ... THERE ARE MORE EVIL AND
BIGGER ROGUES IN CIA, NSA, PENTAGON AND THE WHITE HOUSE. Dont forget
that BASTARD, NIXON and JOHNSON who sank USS LIBERTY and KILLED
AMERICANS with the help of ISRAEL ...

THE ONLY ONLY REASON FBI DID THIS IS BECAUSE THEIR CRIME WAS
UNCONCEALABLE. UNDER THE PRETEXT OF SELF-DEFENSE, MANY OF THESE AGENCY
OFFICIALS HAVE COVERED THEIR CRIMES AND DESTROYED EVIDENCE OF THEIR
CRIMES.

FBI COVERED UP A CHILD PEDOPHILIA RING THAT WAS LINED TO REAGAN AND
HERBERT WALKER BUSH. There is a VIDEO on google of the investigation.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Nov 24 11:33:53 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 24 Nov 2006 17:33:53 +0100
Subject: How do I access a main frunction from an import module?
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <4sol7hF10ii6eU1@mid.individual.net>

Jim wrote:

> I have created an import module.  And would like to access a
> function from the main script, e.g.,

May I ask why? This style violates "normal" module philosophy.

Regards,


Bj?rn

-- 
BOFH excuse #307:

emissions from GSM-phones



From Roberto.Bonvallet at cern.ch  Wed Nov 29 11:24:03 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 29 Nov 2006 16:24:03 +0000 (UTC)
Subject: Overloading "if object" unary operator
References: <1164817022.500511.295260@80g2000cwy.googlegroups.com>
Message-ID: <ekkc73$6e3$1@cernne03.cern.ch>

Sarcastic Zombie wrote:
> For example, in the code:
> 
> a = A(56)
> if a:
>    print "Hoo hah!"
> 
> how can I insure that the if will come back true and fire off the print
> if and only if self.id is defined? I want to do this in an overloaded,
> generic way, if possible; I know that I could test for a.id.

Define a method called __nonzero__ that returns True or False.

-- 
Roberto Bonvallet


From no-spam at no-spam-no-spam.invalid  Fri Nov 24 04:23:54 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Fri, 24 Nov 2006 10:23:54 +0100
Subject: Access to variable from external imported module
In-Reply-To: <1164325016.139659.271500@l12g2000cwl.googlegroups.com>
References: <1164316786.875306.276460@h54g2000cwb.googlegroups.com>
	<mailman.656.1164317994.32031.python-list@python.org>
	<1164319761.451409.196660@j44g2000cwa.googlegroups.com>
	<ek57lv$5cd$1@news.albasani.net>
	<1164325016.139659.271500@l12g2000cwl.googlegroups.com>
Message-ID: <ek6dnc$of4$1@news.albasani.net>

GinTon wrote:
> Thanks Robert, the best solution is get all local variables, else is
> impossible access to them.

For test purposes/ex post inspection you could also uncomment the line in:

def f(a=1):
    b=2
    c=3
    #globals().update(locals())
    return a+b
--

then it is more easy and you can get it like:

module.c


You can also create a total stack trace dynamically with this trick function:

def mktb():
    try: raise UserWarning
    except: return sys.exc_info()[2]

def f(a=1):
    b=2
    c=3
    global ftb;ftb=mktb()
    return a+b
----

and then fully inspect the total situation in the func (and all down the call history) ex post at any time with

>>> f()
>>> pdb.post_mortem(module.ftb)               # then do once 'up' in pdb/pywin.debugger...
>>> pywin.debugger.post_mortem(module.ftb)


Which other programming language can do things like this? 
( Unfortunately (legacy) Python has no possibility to (re-)continue execution from exceptions/traces other than by simple generators )

Robert



> robert ha escrito:
>> GinTon wrote:
>>> I would to access to values that are created locally in that method
>> after the method has executed? usually the return value?
>> or you want to get all local variables, then make a func/method
>>
>> def f(a=1):
>>     b=2
>>     c=3
>>     return locals()  #X/Object(locals())
>>
>> --------
>>
>> d=module.f()
>> print d['c']         # d.c
> 


From sjmachin at lexicon.net  Fri Nov 17 16:45:30 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 13:45:30 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <pan.2006.11.17.08.19.21.505181@REMOVEME.cybersource.com.au>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
	<1163746781.666937.63970@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.08.19.21.505181@REMOVEME.cybersource.com.au>
Message-ID: <1163799930.833461.305810@k70g2000cwa.googlegroups.com>



On Nov 17, 7:19 pm, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
[snip]

> You want to see "HIDEDCT1" match closer to "HIDESCT1" than "HIDEDST1":
>
> HIDEDCT1 -- John's "best match" target string
> HIDEDST1 -- difflib's "best match" target string
> HIDESCT1 -- source string
>
> John's best match matches in seven of eight positions, compared to six
> of eight for the difflib best match. Disregarding order, both have seven
> matching characters. That's a pretty slim difference between the two:
>
> >>> "".join(difflib.Differ().compare("HIDEDCT1", "HIDESCT1"))
'  H  I  D  E- D+ S  C  T  1'
>>> "".join(difflib.Differ().compare("HIDEDST1", "HIDESCT1"))
'  H  I  D  E- D  S+ C  T  1'
>
> I honestly don't know how to interpret those results :(

Take 1, firing from the hip:

The formatting of that output is suboptimal. Better would be:
'  H  I  D  E -D +S  C  T  1'
interpreted as "delete D, insert S"
'  H  I  D  E -D  S +C  T  1'
interpreted as "delete D, insert C"

After reflection that the author of difflib is known not to be so
silly, take 2:

| >>> list(difflib.Differ().compare("HIDEDCT1", "HIDESCT1"))
['  H', '  I', '  D', '  E', '- D', '+ S', '  C', '  T', '  1']

And the docs shed some light on what is going on:

| >>> help(difflib.Differ().compare)
Help on method compare in module difflib:

compare(self, a, b) method of difflib.Differ instance
    Compare two sequences of lines; generate the resulting delta.

    Each sequence must contain individual single-line strings ending
with
    newlines. Such sequences can be obtained from the `readlines()`
method
    of file-like objects.  The delta generated also consists of
newline-
    terminated strings, ready to be printed as-is via the writeline()
    method of a file-like object.

    Example:

    >>> print
''.join(Differ().compare('one\ntwo\nthree\n'.splitlines(1),
    ...
'ore\ntree\nemu\n'.splitlines(1))),
    - one
    ?  ^
    + ore
    ?  ^
    - two
    - three
    ?  -
    + tree
    + emu

HTH,
John



From john at castleamber.com  Sun Nov 19 12:34:08 2006
From: john at castleamber.com (John Bokma)
Date: 19 Nov 2006 17:34:08 GMT
Subject: decompiler
References: <1163822905.706713.216940@e3g2000cwe.googlegroups.com>
	<Xns987F45C03807castleamber@130.133.1.4>
	<1163893594.341657.248720@k70g2000cwa.googlegroups.com>
	<4sb0kmFurjq2U3@mid.individual.net>
Message-ID: <Xns988075AF43403castleamber@130.133.1.4>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:

> Fuzzyman wrote:
> 
>> That's terrible. You read comp.lang.perl.misc *as well* ?
>> 
>> ;-)
> 
> You have to know your enemy ;)

LOL :-)

I am a Perl programmer who wants to keep up his Perl skills, and to study 
Python.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From sjmachin at lexicon.net  Fri Nov 24 14:09:31 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 11:09:31 -0800
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164392786.339330.161940@h54g2000cwb.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
	<1164390207.777502.24220@h54g2000cwb.googlegroups.com>
	<1164392786.339330.161940@h54g2000cwb.googlegroups.com>
Message-ID: <1164395371.149987.40130@l39g2000cwd.googlegroups.com>


Jim wrote:
> John Machin wrote:
> > Jim wrote:
> > > Hi,
> > >
> > > I have created an import module.  And would like to access a function
> > > from the main script, e.g.,
> > >
> > > file abc.py:
> > > ###################
> > > def a():
> > >     m()
> > >     return None
> > > ####################
> > >
> > > file main.py:
> > > #####################
> > > from abc import *
> > > def m():
> > >     print 'something'
> > >     return None
> > >
> > > a()
> > > ######################
> > >
> > > python25.exe main.py
> > >
> >
> > Although there are literally correct answers to your question, the best
> > answer is "Don't do that. You would be creating circular references
> > between modules, and run the risk of emulating the mythical ooloo bird
> > by disappearing up your own fundamental orifice". Some possible
> > practical solutions:
> >
> > 1. Put the m function in a 3rd file/module. Then any other module which
> > needs it can import/call.
> >
> > 2. If you think that's not a good idea, then put it in abc.py (it's not
> > used in main.py in your example).
> >
> > 3. Maybe this will suit what you are really trying to do:
> >
> >  file abc.py:
> >  ###################
> >  def a(argfunc): # <<<<<=====
> >      argfunc() # <<<<<=====
> >  ####################
> >
> >  file main.py:
> >  #####################
> >  from abc import *
> >  def m():
> >      print 'something'
> >
> >  a(m) # <<<<<=====
> >  ######################
> >
> > 4. If you think *that's* not a good idea, then you might like to
> > explain at a higher level what you are *really* trying to achieve :-)
> > E.g. "Function m is one of n functions in main.py of which abc.py
> > may/must call 0, 1, or many because blah blah blah ..."
> >
> > BTW, "return None" at the very end of a function is redundant. The
> > Python compiler generates "return None" automagically (implicitly!?)
> > instead of letting you fall off the end of the world. Which book or
> > tutorial are you using?
> >
> > BTW #2: "python25.exe main.py" ?? If you are on Windows, have Python
> > 2.4 as your default setup, and are trialling 2.5: you may like to ask
> > (in a new thread) about more convenient ways of doing it. Otherwise you
> > might like to tell what you are up to (in a new thread) so that your
> > problem can be diagnosed correctly and cured :-)
> >
> > HTH,
> > John
>
> BTW#1: I have most of the python books from O'Reilly.  I'm sure that
> some of them say that its a good idea to use 'return None'.

Instead of "return None", consider using "return for refund" ;-)

> However,
> most their examples do not us it.  Anyway I find that its useful when
> reading my own scripts.
>
> BTW#2: I do not have Python 2.4 installed anymore.  Therefore, it is
> not a trialling problem.

Looks like it *was* a trialling problem, with weird residual effects.
The point was that it's a very strange practice to (a) name the
executable "python25.exe" [standard installation would produce
C:\Python25\python.exe] (b) want/need to use ".exe" when invoking it.

>
> I thought that it would be NICE to keep the application and the user's
> script separate from each other, being that python is so flexible.

Most other people think that that's a very nice idea too; there was
just no clue in your original posting about what you were really trying
to do.

> However, there seems to be no end to the problems that occur by doing
> this.  So I will abandon this exercise, since it appears not to be a
> very good programming practise.

So what about my suggestion 3? I got the impression from your reply to
Bjoern that it was a good fit for your case. The functions are in what
we now know to be the user's script, and the app calls them. What
problems?

Cheers,
John



From john106henry at hotmail.com  Sun Nov 19 11:10:17 2006
From: john106henry at hotmail.com (John Henry)
Date: 19 Nov 2006 08:10:17 -0800
Subject: Why isn't SPLIT splitting my strings
In-Reply-To: <1163932286.420652.100100@f16g2000cwb.googlegroups.com>
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
	<1163932286.420652.100100@f16g2000cwb.googlegroups.com>
Message-ID: <1163952617.270591.279730@j44g2000cwa.googlegroups.com>

Meaning:

import re

newString= re.split('[; ()\[\]", result)



Nick Vatamaniuc wrote:
> The regular string split does not take a _class_ of characters as the
> separator, it only takes one separator. Your example suggests that you
> expect that _any_ of the characters "; ()[]" could be a separator.
> If you want to use a regular expression as a list of separators, then
> you need to use the split function from the regular expression module
> (re):
> http://docs.python.org/lib/node46.html
>
> Hope this helps,
> Nick V.
>
>
> ronrsr wrote:
> > I'm trying to break up the result tuple into keyword phrases.  The
> > keyword phrases are separated by a ;  -- the split function is not
> > working the way I believe it should be. Can anyone see what I"m doing
> > wrong?
> >
> > bests,
> >
> > -rsr-
> >
> >
> >
> >  print "newstring =", str(result[i][0])
> >         print "just split", str(result[i][0]).split('; ()[]"')
> >         zd.append(str(result[i][0]).split('; ()[]"'))
> >
> >
> > result= (('Agricultural subsidies; Foreign aid',), ('Agriculture;
> > Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
> > Childhood Development, Birth Defects; Toxic Chemicals',),
> > ('Antibiotics, Animals',), ('Agricultural Subsidies, Global Trade',),
> > ('Agricultural Subsidies',), ('Biodiversity',), ('Citizen Activism',),
> > ('Community Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture,
> > Cotton',), ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
> > ('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
> > Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
> > Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
> > ('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
> > Childhood Development, Birth Defects',), ('Corporate Reform,
> > Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
> > (Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
> > Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
> > ('Democracy, Corporate
> >
> >
> >
> > partial results:
> >
> > string a =  Agricultural subsidies; Foreign aid
> > newstring = Agricultural subsidies; Foreign aid
> > just split ['Agricultural subsidies; Foreign aid']
> > newstring = Agriculture; Sustainable Agriculture - Support; Organic
> > Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> > Toxic Chemicals
> > just split ['Agriculture; Sustainable Agriculture - Support; Organic
> > Agriculture; Pesticides, US, Childhood Development, Birth Defects;
> > Toxic Chemicals']
> > newstring = Antibiotics, Animals
> > just split ['Antibiotics, Animals']



From tomas at fancy.org  Wed Nov 22 14:23:15 2006
From: tomas at fancy.org (Tom Plunket)
Date: Wed, 22 Nov 2006 11:23:15 -0800
Subject: Programmatically replacing an API for another module
References: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>
	<4562de7f$0$21252$426a34cc@news.free.fr>
	<rc57m29qq8m1uebvrkc9g7bcn9li38agdv@4ax.com>
	<20061122183547.GA3929@kateandchris.net>
	<mailman.601.1164220743.32031.python-list@python.org>
Message-ID: <rr89m2l2bir2htbat2er710vo92jmrhlg1@4ax.com>

Chris Lambacher wrote:

> > > I'm just a bit loathe to download and install more stuff when
> > > something simpler appears to be near-at-hand.  ...especially
> > > considering the page describing this module doesn't offer any download
> > > links!  http://python-mock.sourceforge.net/
> 
> Oh yeah, and the download link for python-mock is:
> http://sourceforge.net/project/showfiles.php?group_id=138804

Heh, yeah I'm sure that's what I got when I went to sf.net and typed
in the project name, then submitted a bug for the homepage that it
doesn't offer any links to find the download.  ;)

-tom!


From tjreedy at udel.edu  Thu Nov 16 17:53:58 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 16 Nov 2006 17:53:58 -0500
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
Message-ID: <ejiq64$gem$1@sea.gmane.org>


"gabor" <gabor at nekomancer.net> wrote in message 
news:edfc7$455cd28b$59ad1aca$8718 at news.flashnewsgroups.com...
> so if the to-unicode-conversion fails, it falls back to the original
> byte-string. i went and have read the patch-discussion.
>
> and now i'm not sure what to do.
> i know that:
>
> 1. the documentation is completely wrong. it does not always return
> unicode filenames

Unless someone says otherwise, report the discrepancy between doc and code 
as a bug on the SF tracker.  I have no idea of what the resolution should 
be ;-).

tjr





From sjmachin at lexicon.net  Thu Nov  2 00:28:32 2006
From: sjmachin at lexicon.net (John Machin)
Date: 1 Nov 2006 21:28:32 -0800
Subject: Regular Expression for a string
In-Reply-To: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
References: <1162440285.962155.325540@f16g2000cwb.googlegroups.com>
Message-ID: <1162445312.608506.177340@m7g2000cwm.googlegroups.com>


Teja wrote:
> HI all,
>
> I need to write a regular experssion for a string which satisfies the
> following a criteria :
>
> 1) it should start with an alphabet
> 2) it can contain alphabets/digits/_ from second character
> 3) it can contain "[a-z]" or "[0-9]" at the end. but this is optional

Based on the examples you give later, you don't mean "optional" (0 or 1
occurrences), you mean 0 or more occurrences.
Assuming "alphabet" means "English alphabetic":

r"[a-zA-Z][a-zA-Z0-9_]*(\[[a-z0-9]\])*"

HTH,
John



From fredrik at pythonware.com  Sat Nov 25 16:30:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 22:30:47 +0100
Subject: Simple threading
In-Reply-To: <12mgkd6e5cp5l16@corp.supernews.com>
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>	<mailman.704.1164434215.32031.python-list@python.org>
	<12mgkd6e5cp5l16@corp.supernews.com>
Message-ID: <ekacm8$807$2@sea.gmane.org>

Grant Edwards wrote:

> That depends on the type of the global and how they're used.
> Re-binding a name is always an atomic operation.  Modifying
> many mutable objects is atomic.

footnote: for more on this topic, see this FAQ entry:

http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-thread-safe.htm

and this recent python-dev thread that discusses that entry:

http://mail.python.org/pipermail/python-dev/2006-November/thread.html#69981

</F>



From sjmachin at lexicon.net  Thu Nov 16 02:39:37 2006
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 16 Nov 2006 18:39:37 +1100
Subject: Yield
In-Reply-To: <1163659530.752607.120880@m73g2000cwd.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
Message-ID: <455c15ca$1@news.eftel.com>

On 16/11/2006 5:45 PM, olive wrote:
> dwelch91 a ?crit :
>> http://docs.python.org/ref/yield.html
> 
> This is a perfect example that demonstrate how the actual python is bad
> and most of the time useless (at least for me).

I think that you left the word "documentation" out after "python" :-)

> 
> We really need mor example !
> 
> I would like to thanks Fredrik for his contribution to improve that.

Call me crazy, but after an admittedly quick read, the version on the 
wiki seems to be about word for word with on the docs.python.org version.

Could you please tell us how you think the wiki version is an improvement?

Cheers,
John


From maarten at remove_this_ws.tn.tudelft.nl  Fri Nov 17 19:15:48 2006
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Sat, 18 Nov 2006 01:15:48 +0100
Subject: About alternatives to Matlab
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
	<1163711343.870829.110030@h48g2000cwc.googlegroups.com>
Message-ID: <b6916$455e507c$82a1bcd4$12478@news2.tudelft.nl>

sturlamolden wrote:

> Sorry Mathworks, I have used your product for years, but you cannot
> compete with NumPy.

Funny. I went exactly the other way. Had a full OO postprocessing library
for Python/Scipy/HDF etc which worked brilliantly. Then changed to a 64 bit
machine and spent three days trying to install all the additional libraries
that I had become dependent on over the year. In the end, I gave up
completely frustrated (something to do with a Fortran compiler in
combination with SciPy or something). Then I tried MATLAB  and was
completely delighted that there was a program with all MY batteries
included :-).

BTW, I have the impression that MATLAB and SciPy have about the same
performance.

Cheers, Maarten
-- 
===================================================================
Maarten van Reeuwijk                    dept. of Multiscale Physics
Phd student                             Faculty of Applied Sciences
maarten.vanreeuwijk.net              Delft University of Technology


From bignose+hates-spam at benfinney.id.au  Mon Nov 13 15:31:07 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 14 Nov 2006 07:31:07 +1100
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
Message-ID: <87k61zgkc4.fsf@benfinney.id.au>

Michael Hobbs <mike at hobbshouse.org> writes:

> To be clear, this is the actual thrust of my argument. It seems
> redundant to have *both* line continuations and colons in compound
> statements.

Why are you trying to remove redundancy? The language is designed for
communication between people (programmers) primarily. Redundancy is
often the best way to be explicit and readable.

-- 
 \     "I was in the first submarine. Instead of a periscope, they had |
  `\            a kaleidoscope. 'We're surrounded.'"  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From nospam at domain.tld  Thu Nov 16 09:20:44 2006
From: nospam at domain.tld (Stephan Kuhagen)
Date: Thu, 16 Nov 2006 15:20:44 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<455c54c4$1@quokka.wn.com.au>
	<ejhmu9$3pq$1@kohl.informatik.uni-bremen.de>
	<1163684397.700298.303410@m7g2000cwm.googlegroups.com>
Message-ID: <ejhs3t$57j$1@kohl.informatik.uni-bremen.de>

Paul Boddie wrote:

>> implement the lowest common denominator of all OS resource managements to
>> be platform independent, which is a strong requirement, IMO.
> 
> I think I understand what you intend to say here: that some kind of
> Python sandbox relying on operating system facilities can only depend
> on facilities implemented in all of the most interesting operating
> systems (which I once referred to as "the big three", accompanied by
> howls of protest/derision

Oberon, Plan 9 and AmigaOS...? ;-)

> ). Yet just as people like to say that 
> choosing a language is all about "choosing the right tool for the job",
> shouldn't the choice of operating system be significant as well?

Yes, it should. But it isn't most times, I think. Often you have the
situation to run a certain app e.g. on a OS that you can't simply exchange
to your needs, for example the game server you mentioned, if this should
run on an external host which is not maintained by you. 

Personally I would always prefer an OS independent solution, because it
makes you more flexible. Some OS may be a good choice at a given time, but
after you app has grown up, you may come to the decision to change the OS
for some reason, but can't because you app depends on some of its specific
features. Especially for apps written in a scripting language I would try
to avoid that.

> If 
> you're running a "Try Python" Web site, as some people were doing a few
> months ago, isn't it important to choose the right operating system as
> part of the right complete environment, instead of having the
> theoretical possibility of running it on something like RISC OS, yet
> having someone take your site down within seconds anyway? I don't know
> whether it's the same people who like to promote "how well Python plays
> with everything else" who also demand totally cross-platform solutions
> ("if it doesn't work on Windows, we won't do it"), but if so, I'd be
> interested in how they manage to reconcile these views.

I'm afraid, we can't have a perfect world... But as I stated in another
posting before, I think it is possible, to get a secure execution
environment in a platform independent manner. The Tcl people did it and
since I made myself already very unpopular at c.l.tcl by requesting some of
Pythons goods for Tcl, I can do the same here by requesting some of Tcls
good inventions for Python... ;-)

> The emergence of virtualisation as a commodity technology would suggest
> that sandboxing language runtimes isn't as fashionable as it was ten
> years ago.

Virtual environments are a good choice for some of the tasks that were done
with sandboxes in the past. But I'm afraid, that they are too huge for many
problems. Imagine running an instance of a virtual machine on a mobile
phone, or needing to execute some hundreds of them in parallel on a game
server (or CGI) which itself runs on a virtual host at your webhoster, and
of course none of them should be able to kill it's neighbours, so all of
them need their own VM... phiu, that would need a really big iron. So the
the idea of VMs _is_ a good one for certain situations, but the need for
secure execution environments inside an interpreter remains.

Regards
Stephan
 




From fredrik at pythonware.com  Thu Nov 30 13:58:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 30 Nov 2006 19:58:28 +0100
Subject: Tkinter
In-Reply-To: <1164912236.741499.276670@l39g2000cwd.googlegroups.com>
References: <1164908779.941142.242400@80g2000cwy.googlegroups.com>
	<1164912236.741499.276670@l39g2000cwd.googlegroups.com>
Message-ID: <ekn9kj$r4i$1@sea.gmane.org>

Boneh wrote:
>> The module is not found on the system, althouhg I can use python2.4. i
>> am using fedoralinux5
> 
> ????????????????????????????????????

I see lots of question marks, but I don't see a question.  are you 
asking why a module you haven't installed isn't installed?  have you 
tried installing it?

</F>



From ccurvey at gmail.com  Wed Nov 29 16:47:42 2006
From: ccurvey at gmail.com (Chris Curvey)
Date: 29 Nov 2006 13:47:42 -0800
Subject: ensuring valid latin-1
Message-ID: <1164836862.381040.298030@l12g2000cwl.googlegroups.com>

Hey all,

I'm trying to write something that will "fail fast" if one of my users
gives me non-latin-1 characters.  So I tried this:

>>> testString = "\x80"
>>> foo = unicode(testString, "latin-1")
>>> foo
u'\x80'

I would have thought that that should have raised an error, because
\x80 is not a valid character in latin-1 (according to what I can
find).  Is this the expected behavior, or am I missing something?

I'm on Windows, but I have explicitly set the character set to be
latin-1 in sitecustomize.py

>>> import sys
>>> sys.getdefaultencoding()
'latin-1'



From claird at lairds.us  Mon Nov 27 11:25:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 27 Nov 2006 16:25:03 +0000
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<069u24-t0c.ln1@lairds.us>
Message-ID: <v3gr34-h3m.ln1@lairds.us>

In article <069u24-t0c.ln1 at lairds.us>, I reported:
			.
			.
			.
>I appreciate your clarification.  I can report back that we
>certainly move in different circles; I, for example, knew of
>people with multi-million-dollar budgets deciding on Python-
>based Web technology for *serious* applications in '96.  Ruby
			.
			.
			.
Was Python really *such* big business so long ago?  Without put-
ting myself out to look through my notes, and make sure of what I
have permission to disclose, I can point, for instance, to <URL:
http://www.opticality.com/Press/Opticality/LinuxMagazine/view >:
"By October 1998, Pedhazur had invested $750,000" in Digital Cre-
ations, the company behind Python-based Web framework Zope (modulo
a few name changes).  That's not the only case.  So, yes, I repeat:
Python-based Web business well beyond the scale of "parts we found
in a dumpster" has been going on for a decade.

I'm ready to grant Ruby on Rails has impacted cultural awareness
in a way Python doesn't yet touch.  I'm not a good judge of such 
matters.


From johnjsal at NOSPAMgmail.com  Tue Nov 14 16:55:28 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Nov 2006 16:55:28 -0500
Subject: mark lutz interview?
Message-ID: <455a3b24$0$32421$c3e8da3@news.astraweb.com>

Does anyone know where I might find the Mark Lutz interview from 
TechTalk? Their website still doesn't have it yet. I didn't know if it 
was available elsewhere.

Thanks.


From jiang.haiyun at gmail.com  Wed Nov  8 09:32:31 2006
From: jiang.haiyun at gmail.com (jiang.haiyun at gmail.com)
Date: 8 Nov 2006 06:32:31 -0800
Subject: Character encoding
In-Reply-To: <pwd4h.4227$ig4.3956@newsread2.news.pas.earthlink.net>
References: <1162928072.047884.163420@i42g2000cwa.googlegroups.com>
	<pwd4h.4227$ig4.3956@newsread2.news.pas.earthlink.net>
Message-ID: <1162996351.850060.293420@h48g2000cwc.googlegroups.com>


Dennis Lee Bieber wrote:
> On 7 Nov 2006 11:34:32 -0800, "mp" <mailpitches at email.com> declaimed the
> following in comp.lang.python:
>
> > I have html document titles with characters like &gt;, &nbsp;, and
> > &#135. How do I sddecode a string with these values in Python?
> >
>
> 	Wouldn't HTMLParser be suited for such activity?
> --
> 	Wulfraed	Dennis Lee Bieber		KD6MOG
> 	wlfraed at ix.netcom.com		wulfraed at bestiaria.com
> 		HTTP://wlfraed.home.netcom.com/
> 	(Bestiaria Support Staff:		web-asst at bestiaria.com)
> 		HTTP://www.bestiaria.com/

Use htmlentitydefs and SGMLParser to re-generate it .



From sjmachin at lexicon.net  Sun Nov 26 03:15:34 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 00:15:34 -0800
Subject: search versus match in re module
References: <mailman.617.1164256248.32031.python-list@python.org>
	<1164291336.523872.131610@h54g2000cwb.googlegroups.com>
	<4565BC89.9060901@mac.com>
	<7.0.1.0.0.20061124234209.03442fe0@yahoo.com.ar>
	<4567B532.4030906@mac.com>
	<7.0.1.0.0.20061125034101.01f7acb0@yahoo.com.ar>
	<mailman.719.1164470313.32031.python-list@python.org>
	<tv1ah.3127$ql2.930@newsread3.news.pas.earthlink.net>
	<mailman.729.1164515380.32031.python-list@python.org>
Message-ID: <1164528934.695210.220500@j44g2000cwa.googlegroups.com>

wo_shi_big_stomach wrote:

> Thanks for the great tip about fileinput.input(), and thanks to all who
> answered my query. I've pasted the working code below.
>
[snip]
> 	# check first line only
> 	elif fileinput.isfirstline():
> 		if not re.search('^From ',line):

This "works", and in this case you are doing it on only the first line
in each file, but for future reference:

1. Read the re docs section about when to use search and when to use
match; the "^" anchor in your pattern means that search and match give
the same result here.

However the time they take to do it can differ quite a bit :-0

C:\junk>\python25\python -mtimeit -s"import re;text='x'*100"
"re.match('^From ',
text)"
100000 loops, best of 3: 4.39 usec per loop

C:\junk>\python25\python -mtimeit -s"import re;text='x'*1000"
"re.match('^From '
,text)"
100000 loops, best of 3: 4.41 usec per loop

C:\junk>\python25\python -mtimeit -s"import re;text='x'*10000"
"re.match('^From
',text)"
100000 loops, best of 3: 4.4 usec per loop

C:\junk>\python25\python -mtimeit -s"import re;text='x'*100"
"re.search('^From '
,text)"
100000 loops, best of 3: 6.54 usec per loop

C:\junk>\python25\python -mtimeit -s"import re;text='x'*1000"
"re.search('^From
',text)"
10000 loops, best of 3: 26 usec per loop

C:\junk>\python25\python -mtimeit -s"import re;text='x'*10000"
"re.search('^From
 ',text)"
1000 loops, best of 3: 219 usec per loop

Aside: I noticed this years ago but assumed that the simple
optimisation of search was not done as a penalty on people who didn't
RTFM, and so didn't report it :-)

2. Then realise that your test is equivalent to

if not line.startswith('^From '):

which is much easier to understand without the benefit of comments, and
(bonus!) is also much faster than re.match:

C:\junk>\python25\python -mtimeit -s"text='x'*100"
"text.startswith('^From ')"
1000000 loops, best of 3: 0.584 usec per loop

C:\junk>\python25\python -mtimeit -s"text='x'*1000"
"text.startswith('^From ')"
1000000 loops, best of 3: 0.583 usec per loop

C:\junk>\python25\python -mtimeit -s"text='x'*10000"
"text.startswith('^From ')"

1000000 loops, best of 3: 0.612 usec per loop

HTH,
John



From fredrik at pythonware.com  Thu Nov 23 05:16:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 11:16:46 +0100
Subject: How do I find possible matches using regular expression?
In-Reply-To: <1164276138.816724.253400@l12g2000cwl.googlegroups.com>
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>	<yDd9h.2553$Gk5.410@tornado.texas.rr.com>
	<1164276138.816724.253400@l12g2000cwl.googlegroups.com>
Message-ID: <ek3sef$sh$1@sea.gmane.org>

Andy wrote:

> The problem is the input will be much more complex than the example, it
> could be something like "30 minutes later" where any string starting
> with a number is a possible match.

so if I type "1", are you going to suggest all possible numbers
that start with that digit?  doesn't strike me as very practical.

maybe you could post a more detailed example, where you clearly
explain what a pattern is and how it is defined, what prediction
means, and what you want to happen as new input arrives, so we
don't have to guess?

</F>



From pavlovevidence at gmail.com  Tue Nov 28 10:31:26 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 28 Nov 2006 07:31:26 -0800
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <Xns9888CD96B985AOKB@199.45.49.11>
References: <200611261804.54669.mgiann@beta-cae.gr>
	<200611271133.48359.mgiann@beta-cae.gr>
	<ekecd9$e8c$1@sea.gmane.org>
	<mailman.768.1164637881.32031.python-list@python.org>
	<Xns988896361B9C5duncanbooth@127.0.0.1>
	<Xns9888724C01B78OKB@199.45.49.11>
	<mailman.779.1164656450.32031.python-list@python.org>
	<Xns9888CD96B985AOKB@199.45.49.11>
Message-ID: <1164727886.491487.176840@j72g2000cwa.googlegroups.com>

OKB (not okblacke) wrote:
> Carsten Haese wrote:
>
> > You can change the behavior of a list's sort method by overriding
> > sort. You can't change the behavior of sort by overriding
> > __getitem__ and __setitem__, because sort does not call __getitem__
> > or __setitem__.
>
>     	Why doesn't it?

Because the concerns of thousands of legitimate programmers who want
good performance out of their sorts outweigh the concerns of the one or
two hax0r d00ds who think it would be cool to hook into sort internals.


live-long-and-prosper-ly yr's,


Carl Banks



From DustanGroups at gmail.com  Sat Nov 11 17:10:12 2006
From: DustanGroups at gmail.com (Dustan)
Date: 11 Nov 2006 14:10:12 -0800
Subject: reduce to be removed?
Message-ID: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>

According to the following page on Wikipedia:
http://en.wikipedia.org/wiki/Python_%28programming_language%29#Future_development
reduce is going to be removed in python 3.0. It talks of an
accumulation loop; I have no idea what that's supposed to mean. So,

===============================
>>> x =\
[[1,2,3],
 [4,5,6],
 [7,8,9]]
>>> reduce(lambda a,b:a+b,  x,  [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]
===============================

What's an accumulation loop, and how would I convert this code so it's
compatible with the future 3.0 (preferably in a short sweet expression
that I can embed in a list comprehension)?



From rw at smsnet.pl  Mon Nov 20 06:22:08 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: 20 Nov 2006 03:22:08 -0800
Subject: rpncalc-2.5 RPN Calculator for Python
In-Reply-To: <1164010575.812704.120600@f16g2000cwb.googlegroups.com>
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>
	<mailman.491.1164004338.32031.python-list@python.org>
	<1164009539.310173.248620@m7g2000cwm.googlegroups.com>
	<1164010575.812704.120600@f16g2000cwb.googlegroups.com>
Message-ID: <1164021728.545537.170920@m7g2000cwm.googlegroups.com>


Ant wrote:
> > name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
>
> Lukershavik IIRC. At least that's how I was told it was pronounced (I
> had to say the damn name many times in presentations whilst using his
> algebras to model three-valued logic. Don't know if there were many
> Poles there to criticise mind ;-) )

I wasn't there but you certainly deserved the criticism. ;-)
"Lukershavik" sounds horrible. I'm Polish so I know what I'm saying.
But don't worry, I know it's difficult. :)
Closer would be I think:

Woo  as in wood
cu     as in cup
sh    as in ship
e      as in bed
vi       as in victim
tch    as in catch

Woocushevitch

-- 
HTH,
Rob



From frank at niessink.com  Tue Nov 14 15:31:22 2006
From: frank at niessink.com (Frank Niessink)
Date: Tue, 14 Nov 2006 21:31:22 +0100
Subject: wxpython - wxtoolbar font size
In-Reply-To: <1163519398.369070.165890@i42g2000cwa.googlegroups.com>
References: <1163519398.369070.165890@i42g2000cwa.googlegroups.com>
Message-ID: <455A279A.2090404@niessink.com>

Ghido:
> Hi all i want to set wx.toolbar font size and i use this code:
> 
> self.tb1 = wx.ToolBar(self, -1, style=wx.TB_HORIZONTAL|
>                                     wx.TB_TEXT)
> self.tb1.SetFont(wx.Font(9, wx.DEFAULT, wx.NORMAL,0))
> self.SetToolBar(self.tb1)
> 
> but i obtain nothing. Is possibile? where i wrong?
> I use wxpython 2.6.3 on ubuntu edgy

You need to call self.tb1.Realize(). BTW, you probably want to add some 
tools to the toolbar too. See attachment.

Cheers, Frank
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From duncan.booth at invalid.invalid  Tue Nov  7 09:02:30 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 7 Nov 2006 14:02:30 GMT
Subject: __init__ function problem
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
Message-ID: <Xns98748ED809AE9duncanbooth@127.0.0.1>

"kelin,zzf818 at gmail.com" <zzf818 at gmail.com> wrote:

> Today I read the following sentences, but I can not understand what
> does the __init__ method of a class do?
> __init__ is called immediately after an instance of the class is
> created. It would be tempting but incorrect to call this the
> constructor of the class. It's tempting, because it looks like a
> constructor (by convention, __init__ is the first method defined for
> the class), acts like one (it's the first piece of code executed in a
> newly created instance of the class), and even sounds like one ("init"
> certainly suggests a constructor???ish nature). Incorrect, because the
> object has already been constructed by the time __init__ is called, and
> you already have a valid reference to the new instance of the class.
> But __init__ is the closest thing you're going to get to a constructor
> in Python, and it fills much the same role.

I don't know where you read that, but it is wrong (or at least out of 
date). The closest thing you are going to get to a constructor in Python is 
actually the constructor '__new__'. Mostly though you don't need to worry 
about __new__ in Python.

> 
> It says the __init__ is called immediately after an instance of the
> class is created. What dose "immediately" mean?

It means that when you call:

x = SomeClass()

the interpreter first calls the constructor SomeClass.__new__, and then 
immediately calls the initialiser SomeClass.__init__ on the newly created 
object, and after that it returns the newly created object.

A constructor creates an object and returns it, an initialiser initialises 
an existing object and does not return anything.

The constructor has the power to control how the memory for the object is 
allocated (e.g. in Python it could return an already existing object 
instead of creating a new one, but in that case the initialiser will be 
called again on the existing object).

The initialiser usually sets up the attributes on a newly created object, 
but for immutable objects (e.g. tuple) the attributes must be set by the 
constructor.


From maxm at mxm.dk  Fri Nov 24 08:19:23 2006
From: maxm at mxm.dk (Max M)
Date: Fri, 24 Nov 2006 14:19:23 +0100
Subject: Email headers and non-ASCII characters
In-Reply-To: <mailman.673.1164368571.32031.python-list@python.org>
References: <mailman.639.1164291163.32031.python-list@python.org>	<4565bed2$0$13950$edfadb0f@dread15.news.tele.dk>
	<mailman.673.1164368571.32031.python-list@python.org>
Message-ID: <4566F15B.9060002@mxm.dk>

Christoph Haas skrev:
> On Thursday 23 November 2006 16:31, Max M wrote:
>> Christoph Haas skrev:
>>> Hello, everyone...
>>>
>>> I'm trying to send an email to people with non-ASCII characters in
>>> their names. A recpient's address may look like:
>>>
>>> "J?rg N?rgens" <joerg at nowhere>
>>>
>>> My example code:
>>>
>>> =================================
>>> def sendmail(sender, recipient, body, subject):
>>>    message = MIMEText(body)
>>>    message['Subject'] = Header(subject, 'iso-8859-1')
>>>    message['From'] = Header(sender, 'iso-8859-1')
>>>    message['To'] = Header(recipient, 'iso-8859-1')
>>>
>>>    s = smtplib.SMTP()
>>>    s.connect()
>>>    s.sendmail(sender, recipient, message.as_string())
>>>    s.close()
>>> =================================
>>>
>>> However the Header() method encodes the whole expression in
>>> ISO-8859-1:
>>>
>>> =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?=
>>>
>>> However I had expected something like:
>>>
>>> "=?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?=" <joerg at nowhere>
>>>
>>> Of course my mail transfer agent is not happy with the first string
>> Why offcourse?
> 
> Because my MTA doesn't care about MIME. It just transports the email. And 
> it expects an email address in <...> but doesn't decode =?iso...? strings.
> 
>> But it seems that you are passing the Header object a 
>> utf-8 encoded string, not a latin-1 encoded.
>> You are telling the header the encoding. Not asking it to encode.
> 
> Uhm, okay. Let's see:
> 
> u'"J?rg N?rgens" <joerg at nowhere>'.encode('latin-1')
> 
> => '"J\xc3\xb6rg N\xc3\xb8rgens" <joerg at nowhere>'
> 
> So far so good. Now run Header() on it:
> 
> => '=?utf-8?b?IkrDtnJnIE7DuHJnZW5zIiA8am9lcmdAbm93aGVyZT4=?='
> 
> Still nothing like <...> in it and my MTA is unhappy again. What am I 
> missing? Doesn't anyone know how mail clients handle that encoding?


 >>> address = u'"J?rg N?rgens" <joerg at nowhere>'.encode('latin-1')
 >>> address
'"J\xf6rg N\xf8rgens" <joerg at nowhere>'
 >>> from email.Header import Header
 >>> hdr = str(Header(address, 'latin-1'))
 >>> hdr
'=?iso-8859-1?q?=22J=F6rg_N=F8rgens=22_=3Cjoerg=40nowhere=3E?='

Is this not correct?

At least roundtripping works:

 >>> from email.Header import decode_header
 >>> encoded, coding = decode_header(hdr)[0]
 >>> encoded, coding
('"J\xf6rg N\xf8rgens" <joerg at nowhere>', 'iso-8859-1')
 >>> encoded.decode(coding)
u'"J\xf6rg N\xf8rgens" <joerg at nowhere>'

And parsing the address works too.

 >>> from email.Utils import parseaddr
 >>> parseaddr(encoded.decode(coding))
(u'J\xf6rg N\xf8rgens', u'joerg at nowhere')
 >>>

-- 

hilsen/regards Max M, Denmark

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


From rb.online at gmail.com  Mon Nov 27 06:36:53 2006
From: rb.online at gmail.com (rb.online at gmail.com)
Date: 27 Nov 2006 03:36:53 -0800
Subject: silent error in email module
Message-ID: <1164627413.117792.226930@l39g2000cwd.googlegroups.com>

Hi all,

I rencently had trouble finding a bug in an email processing script
because of an error that pass silently in the email module.
The get_payload() method in the email.message module always return
something when the decode argument is set to True.
This behaviour is well documented, but is their a reason to catch the
decoding errors ?
Why not let them pop-up to the calling code ?
Do you think it's worth submitting a RFE ?

renaud



From gagsl-py at yahoo.com.ar  Tue Nov 14 18:49:40 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 14 Nov 2006 20:49:40 -0300
Subject: __cmp__ between dissimilar objects
In-Reply-To: <1163543278.649502.191640@k70g2000cwa.googlegroups.com>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<mailman.112.1163471381.32031.python-list@python.org>
	<1163522471.707278.178600@e3g2000cwe.googlegroups.com>
	<mailman.168.1163532902.32031.python-list@python.org>
	<1163543278.649502.191640@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061114204451.052b7b60@yahoo.com.ar>

At Tuesday 14/11/2006 19:27, insyte at gmail.com wrote:

> > >Can you point me to a description of this algorithm?  It doesn't seem
> > >to be described in the documentation for the rich comparison or __cmp__
> > >methods...
> >
> > PEP 207
> > http://www.python.org/dev/peps/pep-0207/
>
>So since I implemented __cmp__ instead of the rich comparison
>operators, Python first tried to reverse the comparison.  This gave
>datetime the opportunity to throw TypeError *before* the interpreter
>failed over to trying __cmp__.
>
>Is that correct?

Exactly. And if datetime were not so special in its implementation, a 
NotImplementedError (instead of TypeError) would have let your code a 
chance of being executed.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From gabor at nekomancer.net  Sun Nov 19 18:59:41 2006
From: gabor at nekomancer.net (gabor)
Date: Mon, 20 Nov 2006 00:59:41 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <4560EEA0.50900@v.loewis.de>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<6d301$4560e775$59ad1aca$15362@news.flashnewsgroups.com>
	<4560EEA0.50900@v.loewis.de>
Message-ID: <4cc63$4560efe9$59ad1aca$18678@news.flashnewsgroups.com>

Martin v. L?wis wrote:
> gabor schrieb:
>>> I may have missed something, but did you present a solution that would
>>> make the case above work?
>> if we use the same decoding flags as binary-string.decode(),
>> then we could do:
>>
>> [os.path.join(path,n) for n in os.listdir(path,'ignore')]
> 
> That wouldn't work. The characters in the file name that didn't
> decode would be dropped, so the resulting file names would be
> invalid. Trying to do os.stat() on such a file name would raise
> an exception that the file doesn't exist.
> 
>> [os.path.join(path,n) for n in os.listdir(path,'replace')]
> 
> Likewise. The characters would get replaced with REPLACEMENT
> CHARACTER; passing that to os.stat would give an encoding
> error.
> 
>> it's not an elegant solution, but it would solve i think most of the
>> problems.
> 
> No, it wouldn't. This idea is as bad or worse than just dropping
> these file names from the directory listing.

i think that depends on the point of view.
if you need to do something later with the content of files, then you're 
right.

but if all you need is to display them for example...

> 
>>> One approach I had been considering is to always make the decoding
>>> succeed, by using the private-use-area of Unicode to represent bytes
>>> that don't decode correctly.
>>>
>> hmm..an interesting idea..
>>
>> and what happens with such texts, when they are encoded into let's say
>> utf-8? are the in-private-use-area characters ignored?
> 
> UTF-8 supports encoding of all Unicode characters, including the PUA
> blocks.
> 
> py> u"\ue020".encode("utf-8")
> '\xee\x80\xa0'

so basically you'd like to be able to "round-trip"?

so that:

listdir returns an array of filenames, the un-representable bytes will 
be represented in the PUA.

all the other file-handling functions (stat, open, etc..) recognize such 
strings, and handle them correctly.

?

gabor


From sanxiyn at gmail.com  Mon Nov 20 06:26:33 2006
From: sanxiyn at gmail.com (Sanghyeon Seo)
Date: Mon, 20 Nov 2006 20:26:33 +0900
Subject: [ANN] IronPython Community Edition r4
Message-ID: <5b0248170611200326n40124dd9h90f6a3a7b0b3ad06@mail.gmail.com>

This is the fourth release of IronPython Community Edition (IPCE).

You can download it from SourceForge.
http://sourceforge.net/projects/fepy

FePy project aims to provide enhancements and add-ons for IronPython.
Visit the project's homepage for more informations.
http://fepy.sourceforge.net/

Changes in this release follow. Some changes are credited. Uncredited
changes are from me.

Regular expression

_sre.py from PyPy, a pure Python implementation of Python's regular
expression, is included and enabled by default, overriding
IronPython's implementation based on System.Text.RegularExpression.
You can comment out "install_sre_py()" line from site.py to disable
this.

Library

Block encryption algorithms wrappers compatible with pycrypto are added.
New array module based on codes from PyPy, but using .NET array as storage.
pyexpat module is enhanced to run SOAPpy.
pyexpat module handls multiple calls to Parse(). (Fredrik Lundh)
hashlib module accepts arrays as arguments.
ctypes module includes correct c_float and c_double.
ctypes module handles functions taking variable argument list (like printf).
site module initializes support for .pth files and site-packages
directory. (Mark Rees)
Missing built-in codec error handling callbacks are taken from PyPy
and registered. Namely, ignore, xmlcharrefreplace, backslashreplace.
(Christopher Baus)
_fileobject class is taken from CPython and included in socket module.
(Christopher Baus)

WSGI

WSGI gateway is rewritten to use wsgiref library and is a lot more
compatible as a result. (Mark Rees)
C# side of WSGI avoids creating new IronPython engine every request. (Mark Rees)
C# side of WSGI gains various options configurable from web.config,
including whether to reload IronPython engine every request.
(Christopher Baus)

Bundles

url2path modules are now included from Python Standard Library. (Liyu Liu)
wsgiref package is included from CPython 2.5, as needed by new WSGI gateway.
pycrypto and paramiko are included. (paramiko doesn't work yet,
although it imports.)

Patches

You can read the summary of applied patches here.
http://fepy.sourceforge.net/patches.html

New in this release:
patch-ironpython-base64-slash
patch-ironpython-file-canseek
patch-ironpython-re-lastgroup
patch-ironpython-unicodeerror-object
patch-stdlib-logging-getframe

-- 
Seo Sanghyeon


From thomas.weholt at gmail.com  Tue Nov 28 10:04:26 2006
From: thomas.weholt at gmail.com (Thomas W)
Date: 28 Nov 2006 07:04:26 -0800
Subject: Dynamic/runtime code introspection/compilation
In-Reply-To: <1164720704.552472.288980@45g2000cws.googlegroups.com>
References: <1164717323.358146.65410@l39g2000cwd.googlegroups.com>
	<1164720704.552472.288980@45g2000cws.googlegroups.com>
Message-ID: <1164726266.619380.94270@h54g2000cwb.googlegroups.com>

Great !!! That works like charm.

Thanks alot.

Thomas


Leo Kislov wrote:

> Thomas W wrote:
> > Maybe a stupid subject, but this is what I want to do :
> >
> > I got some python code stored in a string:
> >
> > somecode = """
> >
> > from somemodule import ISomeInterface
> >
> > class Foo(ISomeInterface):
> >     param1 = ...
> >     param2 = ....
> >
> > """
> >
> > and I want to compile that code so that I can use the Foo-class and
> > check what class it extends, in this case ISomeInterface etc. I've
> > tried eval, codeop etc. but it doesn't work. Something like this would
> > be nice :
> >
> > from somemodule import ISomeInteface
> >
> > d = compile(sourcecode)
> >
> > myfoo = d.Foo()
> >
> > print ISomeInterface in myfoo.__bases__
> >
> > Any hints?
>
> Here is hello world program for plugins:
>
> import sys
>
> somecode = """
> class Foo:
>    param1 = "Hello, world!"
> """
>
> plugin = type(sys)('unknown_plugin') # Create new empty module
> exec somecode in plugin.__dict__
> 
> print plugin.Foo.param1
> 
>   -- Leo



From billpaterson2006 at googlemail.com  Tue Nov 14 06:17:36 2006
From: billpaterson2006 at googlemail.com (billpaterson2006 at googlemail.com)
Date: 14 Nov 2006 03:17:36 -0800
Subject: Seeking assistance - string processing.
In-Reply-To: <ejc81g$32g$00$1@news.t-online.com>
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<mailman.125.1163500986.32031.python-list@python.org>
	<1163501742.957889.57410@m73g2000cwd.googlegroups.com>
	<ejc81g$32g$00$1@news.t-online.com>
Message-ID: <1163503056.295402.11410@m7g2000cwm.googlegroups.com>

Cheers for the reply.

But I'm still having a spot of bother with the === addition

it would seem that if there is no whitespace after the ===test
then the new === gets added to the next line

e.g file contains:

===test (and then no whitesapace/carriage returns or anything)

and the result is:

===test
===

I tried fidding aruond trying to make it add whitespace but it didnt
work. 

What do you think I should do? 

Cheers



From multani at free.fr  Mon Nov 13 16:19:37 2006
From: multani at free.fr (Jonathan Ballet)
Date: Mon, 13 Nov 2006 22:19:37 +0100
Subject: Python memory usage
References: <1162964551.328495.211090@f16g2000cwb.googlegroups.com>
	<1162966901.337252.45720@m7g2000cwm.googlegroups.com>
	<1162967080.689144.320940@f16g2000cwb.googlegroups.com>
	<1163104700.515953.4210@b28g2000cwb.googlegroups.com>
	<1163446161.594913.269050@b28g2000cwb.googlegroups.com>
	<mailman.87.1163447251.32031.python-list@python.org>
	<20061113211301.7894fc78@localhost.localdomain>
	<mailman.93.1163449857.32031.python-list@python.org>
Message-ID: <20061113221937.0f11fb0c@localhost.localdomain>

Le Mon, 13 Nov 2006 21:30:35 +0100,
Fredrik Lundh <fredrik at pythonware.com> a ?crit :

> Jonathan Ballet wrote:
> 
> >> http://effbot.org/pyfaq/why-doesnt-python-release-the-memory-when-i-delete-a-large-object
> > 
> > Is it still true with Python 2.5 ?
> > 
> > I mean, [http://evanjones.ca/python-memory.html] should fix this
> > behaviour, doesn't it ?
> 
> not really -- that change just means that Python's object allocator
> will return memory chunks to the C allocator if the chunks become
> empty, but as the FAQ entry says, there are no guarantees that
> anything will be returned at all.  it all depends on your
> application's memory allocation patterns.

Ah ok, I thought memory was much "directly freed" to system (but I
misread the faq).

Is there any documents on good application's memory allocation
patterns ?


> (did you read Evan's presentation material, btw?)

I re-read it (thx for mentioning it), but schemas on pages 7, 8 and 9
are not very clear to me.

(snip some questions, since I find answers will writing them).

Where are stored pools which are not completely free ? (not in
'usedpools' nor in 'freepools' objects) (ah, this is the
partially_allocated_arenas I guess :) )
Are 'usedpools' and 'freepools' arenas ?

Smalls objects are stored in free blocks, so a block has a length of 256
bytes I guess. Can its size change (smaller, maybe larger) ?


So, if I am correct :
    - I create a new 'small' object -> Python allocates a new arena, and
stores my object in a free block in one of the pool of this arena
    - this arena is stored in the partially_allocated_arenas list
(Python 2.5)
    - allocating more objects fills all the blocks of every pools of the
arena -> all pools are going one by one into 'usedpools' object
    - del-eting every created object in my Python program free every
blocks of every pools of the arena (with a lot of chance :) ), and pools
are going into the 'freepools' object
    - if all pools from an arena are freed, the arena is freed
    - else, the arena stay allocated, in order to be re-used


Thanks,
	Jonathan


From john106henry at hotmail.com  Fri Nov 17 13:45:36 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 10:45:36 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <1163755106.033233.147900@e3g2000cwe.googlegroups.com>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<1163755106.033233.147900@e3g2000cwe.googlegroups.com>
Message-ID: <1163789136.640162.306360@f16g2000cwb.googlegroups.com>

Learn something new everyday.  I always wondered how spell checkers are
done.  Thanks.

John Machin wrote:
> John Henry wrote:
> > I am just wondering what's with get_close_matches() in difflib.  What's
> > the magic?   How fuzzy do I need to get in order to get a match?
>
> Are you desperate to understand the inner workings of difflib, or do
> you want merely to do some fuzzy matching of strings using a well-known
> somewhat-more-understandable zillions-of-implementations metric?
>
> If the latter, google "Levenshtein distance" for the metric, and
> "Python Levenshtein" -- first hit  for me is an implementation in a
> Python C-extension. If you don't have the ability to compile a C
> extension, or don't need the speed, there should be a few pure-Python
> versions around; I'm specifically aware of one by Magnus Lie Hetland.
> It's less than a screenful of code; good idea to grab it anyway for
> educational purposes -- a quite Pythonic implementation of the
> traditional algorithm.
> 
> HTH,
> John



From timr at probo.com  Fri Nov  3 01:55:54 2006
From: timr at probo.com (Tim Roberts)
Date: Fri, 03 Nov 2006 06:55:54 GMT
Subject: is mod_python borked?
References: <1162480110.992783.267620@e3g2000cwe.googlegroups.com>
Message-ID: <0splk2d7g136j22mcari3a09b7l3cte1rf@4ax.com>

"walterbyrd" <walterbyrd at iname.com> wrote:
>
>I am considering python, instead of php, for web-application
>development. I often see mod_python.criticisized as being borked,
>broken, or just plain sucking.
>
>Any truth to any of that?

mod_python is most definitely NOT the only way of using Python to create a
web site.  CGI by itself is quite practical, unless you are anticipating
100s of hits per minute.  Even if it isn't, something like CherryPy used
through a proxy gives you the benefit of a long-running process with the
convenience of Apache.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From seymour.morris at gmail.com  Sun Nov 19 11:31:53 2006
From: seymour.morris at gmail.com (Seymour)
Date: 19 Nov 2006 08:31:53 -0800
Subject: Reloading after from adder import * ????
In-Reply-To: <1163914443.703646.64080@k70g2000cwa.googlegroups.com>
References: <1163901449.418534.251060@b28g2000cwb.googlegroups.com>
	<1163914443.703646.64080@k70g2000cwa.googlegroups.com>
Message-ID: <1163953912.965436.8880@m73g2000cwd.googlegroups.com>

John,
Thanks for the reply.  Just as a little further background, I am using
Windows XP and Komodo and just trying to learn about classes - how they
work, what they are used for, etc.  I have been studying "Learning
Python (2nd Ed)" by Mark Lutz and Davis Ascher and have been typing in
some of the exercises from Chapt 23, Advanced Class Topics (I tend to
learn better by re-typing them in).  What I posted was only a partial
snippet of the full solution for the Inheritance code solution given on
page 558 of the book, but really was not relevant to my question -
sorry.  I just made some typos and was wondering if there was an easier
way to clear the Python namespace at the interactive prompt rather than
shutting Komodo down and restarting (really brute force).  I finally
figured out the four step solution that I posted but was still
wondering if there was yet an easier way.

FYI, below is the full solution to the Inheritance class exercise in
the book.  Python is a hobby for me and I am not sure  how of if I will
ever use this stuff, but would like to understand it better.  That
said, if you have any follow up study source recommendations, I would
be interested.
Seymour

class Adder:
    def add(self, x, y):
        print 'not implemented!'
    def __init__(self, start=[]):
        self.data = start
    def __add__(self, other):                # Or in subclasses?
        return self.add(self.data, other)    # Or return type?

class ListAdder(Adder):
    def add(self, x, y):
        return x + y

class DictAdder(Adder):
    def add(self, x, y):
        new = {}
        for k in x.keys(): new[k] = x[k]
        for k in y.keys(): new[k] = y[k]
        return new






John Machin wrote:
> Seymour wrote:
> > I created a module with the DictAdder subclass as follows:
> >
> > class DictAdder(Adder):
> >     def add(self, x, y):
> >         new={}
> >         for k in x.keys(): new[k]=x[k]
> >         for k in y.keys(): new[k]=y[k]
> >         return new
> >
> > At the interactive prompt I then said: from Adder import *
> >
> > After defining an instance of DictAdder as x=DictAdder() and trying to
> > add two dictionaries, I notice a typo in DictAdder.  If I then go back
> > and make a change to the DictAdder subclass I have to go through many
> > steps to add two dictionaries (get the revision into active memory):
> > 1. import Adder
> > 2. Reload(Adder)
> > 3. from Adder import *
> > 4. x=DictAdder()
> >
> > Question: Is there an easier and quicker way to get DictAdder into
> > active memory?????
>
> This is one of the occasions where semicolons can come in handy in
> Python:
>
> import adder; reload(adder); from adder import *
>
> Then depending on your OS and what add-on line editing kit (if any) you
> are using, it should only a very small number of keystrokes to retrieve
> that and execute it.
>
> If you meant "is there a single command?", the answer is no, not AFAIK.
>
> Having said that, you seem to have a strange idea about what classes
> are for -- "self" is not used; having such a class "method" seems
> pointless. All you need to do what you are doing  is a simple function,
> whose body can be simply expressed in terms of dict methods:
>
> def funnyfunc(x, y):
>     """This is called a docstring; try to say what the func is doing
> for you"""
>     new = x.copy()
>     new.update(y)
>     return new
>
> Of course that is probably not what you *want* to be doing; but you
> might need to divulge what the Adder class is doing to get more help.
>
> Hints: unlike some other languages,
>
> (1) You don't need to have 1 module file per class; for several small
> related classes (e.g. a main class and a handful of subclasses) it
> makes a lot of sense to put it all in one module.
>
> (2) To do most simple things, you don't even need to write a class at
> all. For example, you can write a few hundred lines of clear
> intelligible Python with very little must-recite-this-spell overhead to
> do quite complicated data manipulations using only (a) built-in
> functions (b) the methods of built-in types like strings, lists and
> dictionaries (c) functions and classes in built-in modules (d) ditto
> 3rd-party modules. In Python classes usually are things that map onto
> something in the real world or at least your model of that; you write
> them when you need to; classes are not artificial hoops you must jump
> through to do the equivalent of:
>    print 2 + 2
> You may end up using classes to emulate some other programming
> constructs, but not yet.
> Eventually you can write those 3rd party modules which are chock-full
> of classes and other goodies, using them as a guide.
> 
> OK, relax, rant over :-)
> 
> HTH,
> John



From sjmachin at lexicon.net  Mon Nov  6 18:01:06 2006
From: sjmachin at lexicon.net (John Machin)
Date: 6 Nov 2006 15:01:06 -0800
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162853677.881233.76940@m7g2000cwm.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
	<1162846153.137536.116970@b28g2000cwb.googlegroups.com>
	<1162853677.881233.76940@m7g2000cwm.googlegroups.com>
Message-ID: <1162854065.932910.99240@k70g2000cwa.googlegroups.com>


Thomas W wrote:
> Ok, I've cleaned up my code abit and it seems as if I've
> encoded/decoded myself into a corner ;-). My understanding of unicode
> has room for improvement, that's for sure. I got some pointers and
> initial code-cleanup seem to have removed some of the strange results I
> got, which several of you also pointed out.
>
> Anyway, thanks for all your replies. I think I can get this thing up
> and running with a bit more code tinkering. And I'll read up on some
> unicode-docs as well. :-) Thanks again.

I strongly suggest that you read the docs *FIRST*, and don't "tinker"
at all.

HTH,
John



From bj_666 at gmx.net  Fri Nov 17 12:20:22 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 17 Nov 2006 18:20:22 +0100
Subject: Python v PHP for web, and restarting Apache?
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.17.17.20.22.793651@gmx.net>

In <1163783247.077263.8590 at j44g2000cwa.googlegroups.com>, walterbyrd
wrote:

> I am not trying to suggest anything here. I'm just asking.

Asking what?  Asking something usually involves a question.  ;-)

Ciao,
	Marc 'BlackJack' Rintsch


From onurb at xiludom.gro  Tue Nov 21 08:21:14 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 21 Nov 2006 14:21:14 +0100
Subject: Reference class in class creation
In-Reply-To: <a1b59$4562eff8$547078de$21737@news.chello.at>
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
Message-ID: <4562fd4b$0$513$426a74cc@news.free.fr>

Gregor Horvath wrote:
> Hi,
> 
> I want to reference a class itself in its body:
> 
> class SomeElement(object):
> 	def __init__(self, mycontainer):
> 		self.mycontainer=mycontainer	
> 	
> class SomeContainer(object):
> 	a = SomeElement(SomeContainer)

Are you sure you want to
1/ create SomeElement as a *class* attribute (that is, an attribute
shared by all instances of SomeContainer) and
2/ pass the SomeContainer *class* to the initializer of SomeElement ?

Well, anyway:

> 
> Unfortunatly this does not work since the name SomeContainer is not
> definied at class creation time of SomeContainer:

indeed.

> 
> How to do this?
> 
> Unfortunatly the obvious:
> 
> class SomeContainer(object):
> 	def __init__(self):
> 		self.a = SomeElement(SomeContainer)

You do understand that declaring 'a' as an attribute of self creates an
instance attribute, while your above snippet creates 'a' as a class
attribute, do you ?

> is not possible because of other constraints.

Care to elaborate ?

FWIW, there are technical answers to your question (look for descriptors
and/or metaclasses)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From nogradi at gmail.com  Thu Nov  9 13:06:52 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 9 Nov 2006 19:06:52 +0100
Subject: Lists of lists and tuples, and finding things within them
In-Reply-To: <1163079978.5053.32.camel@pepper>
References: <1163079978.5053.32.camel@pepper>
Message-ID: <5f56302b0611091006k6326d724t66b654250a8b77e8@mail.gmail.com>

> I have a program that keeps some of its data in a list of tuples.
> Sometimes, I want to be able to find that data out of the list.  Here is
> the list in question:
>
> [('password01', 'unk'), ('host', 'dragonstone.org'), ('port', '1234'),
> ('character01', 'Thessalus')]
>
> For a regular list, I could do something like x.index('host') and find
> the index of it, but I don't know how to do this for a tuple where the
> data item isn't known in advance.  For example, I want to get the "host"
> entry from the list above; but I can only retrieve it if I know what it
> contains (e.g., x.index(('host', 'dragonstone.org'))).
>
> Is there a better way to do this than a construct similar the following?
>
> for key, value in x:
>     if key == 'host':
>         print value
>

If I were you I would use a dictionary for such a thing:

mydict = dict( password01='unk', host='dragonstone.org', port='1234',
character01='Thessalus' )

And then you would look up host by:

mydict[ 'host' ]

HTH,
Daniel


From lowz06 at gmail.com  Mon Nov 20 15:11:32 2006
From: lowz06 at gmail.com (John (Z R) L)
Date: 20 Nov 2006 12:11:32 -0800
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
In-Reply-To: <pan.2006.11.20.13.51.29.845474@web.de>
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
	<pan.2006.11.19.16.59.35.983108@web.de>
	<1163975565.887782.93050@h48g2000cwc.googlegroups.com>
	<pan.2006.11.20.13.51.29.845474@web.de>
Message-ID: <1164053491.979593.51210@j44g2000cwa.googlegroups.com>

> First of all: did you try to run the script using PythonWin and did you
> run it in a command window? What happened? What error messages did you
> get, if any?
>
> The script itself doesn't contain any errors. And in my IDLE it behaves
> perfectly well.
>
> And please, if you answer, keep the text you are answering. This is no web
> forum where you can see several postings at once.

The script is running perfectly fine now for some strange reason?? But
previously it wasn't.

I always type my script in a new Window of the IDLE interface, and when
I do "Run Module", the output appears in the main Python Shell (IDLE).

When I tried to run the script, "1,2,4" would appear, but the new
prompt (>>>) DOESN'T appear. So when I want to run other modules that I
made, Python Shell will say something like "Can't run script, in the
middle of another module process.".

So I have to exit the Python Shell, and then it says "You are currently
running a module, kill it?". I click "Yes", but when I reenter the
program, "1,2,4" suddenly appear on the output, then the program
immediately exits within half a second.

I solve this by deleting the .py and .pyc file which it keeps on
displaying, and the Python IDLE gets reset.

I don't have to delete stuff anymore because the scripts are running
fine now. But I'm worried that this error will happen again
(randomly?!), and I'll be in for more inconvenience...



From email at christoph-haas.de  Thu Nov 23 09:12:33 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Thu, 23 Nov 2006 15:12:33 +0100
Subject: Email headers and non-ASCII characters
Message-ID: <200611231512.33779.email@christoph-haas.de>

Hello, everyone...

I'm trying to send an email to people with non-ASCII characters in their 
names. A recpient's address may look like:

"J?rg N?rgens" <joerg at nowhere>

My example code:

=================================
def sendmail(sender, recipient, body, subject):
   message = MIMEText(body)
   message['Subject'] = Header(subject, 'iso-8859-1')
   message['From'] = Header(sender, 'iso-8859-1')
   message['To'] = Header(recipient, 'iso-8859-1')

   s = smtplib.SMTP()
   s.connect()
   s.sendmail(sender, recipient, message.as_string())
   s.close()
=================================

However the Header() method encodes the whole expression in ISO-8859-1:

=?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?=

However I had expected something like:

"=?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?=" <joerg at nowhere>

Of course my mail transfer agent is not happy with the first string 
although I see that Header() is just doing its job. I'm looking for a way 
though to encode just the non-ASCII parts like any mail client does. Does 
anyone have a recipe on how to do that? Or is there a method in 
the "email" module of the standard library that does what I need? Or 
should I split by regular expression to extract the email address 
beforehand? Or a list comprehension to just look for non-ASCII character 
and Header() them? Sounds dirty.

Hints welcome.

Regards
 Christoph


From rvernica at gmail.com  Fri Nov 17 15:00:46 2006
From: rvernica at gmail.com (Rares Vernica)
Date: Fri, 17 Nov 2006 12:00:46 -0800
Subject: remove a list from a list
In-Reply-To: <455E100D.8030100@tim.thechases.com>
References: <ejkv1u$ajf$1@sea.gmane.org>	<455E0046.1090005@tim.thechases.com>	<ejl13i$hqv$1@sea.gmane.org>	<455E0A20.9000509@tim.thechases.com>	<ejl2re$ns3$1@sea.gmane.org>
	<455E100D.8030100@tim.thechases.com>
Message-ID: <ejl4de$to5$1@sea.gmane.org>

Sorry for not being clear from the beginning and for not using clear 
variable names.

Problem context:

import os
dirs_exclude = set(('a', 'b', 'e'))
for root, dirs, files in os.walk('python/Lib/email'):
     # Task:
     # delete from "dirs" the directory names from "dirs_exclude"
     # case-insensitive

The solution so far is:

for i in xrange(len(dirs), 0, -1):
   if dirs[i-1].lower() in dirs_exclude:
     del dirs[i-1]

I am looking for a nicer solution.

Thanks a lot,
Ray

Tim Chase wrote:
>> Yeah, I ended up doing a similar kind of loop. That is pretty messy.
>>
>> Is there any other way?
> 
> I've already provided 2 (or 3 depending on how one counts) 
> solutions, each of which solve an interpretation of your original 
> problem, neither of which involve more than 3 lines of fairly 
> clean code.  Perhaps a little more context regarding what you 
> *want* to do would help.  However, I suspect that answer is 
> "there is no *cleaner* way to do it".
> 
> Unless you're modifying an existing list that is referenced 
> elsewhere, the reassignment (l = [x for x in l ...]) solution 
> should work just fine.  Thus, unless you have a situation akin to:
> 
> 	g = l
> 	l = [x for x in l if x.lower() not in s]
> 	assert(thing_from_s not in g)
> 
> then just reassign "l".  If not, use the loop.  It's that easy 
> and clean.  Don't try to opaquify it by collapsing it further. 
> Perhaps, if your loop is messy, use my clean loop suggestion.
> 
> -tkc
> 
> 
> 



From kibleur.christophe at gmail.com  Thu Nov  9 17:01:26 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 9 Nov 2006 14:01:26 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <1163106737.776663.18800@h54g2000cwb.googlegroups.com>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
	<1162817233.695765.22780@b28g2000cwb.googlegroups.com>
	<1162831146.195927.296110@e3g2000cwe.googlegroups.com>
	<1163086763.536524.37710@h48g2000cwc.googlegroups.com>
	<1163088412.025310.185250@m7g2000cwm.googlegroups.com>
	<1163106737.776663.18800@h54g2000cwb.googlegroups.com>
Message-ID: <1163109685.982156.272530@e3g2000cwe.googlegroups.com>

Sorry,
I just tried with other lexers, but I'm having some errors (names not
defined errors) with those ones :
1.lexer = QsciLexerRuby()
2.lexer = QsciLexerTeX()
Are they implemented ?



From fredrik at pythonware.com  Mon Nov 20 14:21:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Nov 2006 20:21:55 +0100
Subject: Help!!!  New to Python and getting an error I can't figure out
In-Reply-To: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
References: <W6idnfi5a6HhZvzYnZ2dnUVZ_rOdnZ2d@comcast.com>
Message-ID: <ejsv8k$fk1$1@sea.gmane.org>

Tom Mountney wrote:

> if __name__ == "__main__":
>  (g = dirGrep("c:\\winnt"))
>  files = g.findFiles(".py")
>  print g.findLines("java", files)
> 
> When I try to run the program - python grep.py - I get the following error:
> 
> C:\> python grep.py
>   File "grep.py", line 28
>     if __name__ == '__main__':
>                                              ^
> SyntaxError: invalid syntax

on my machine, I get

C:\> python grep.py
   File "grep.py", line 29
     (g = dirGrep("c:\\winnt"))
        ^
SyntaxError: invalid syntax

which at least points to the right line.  the error here is that you 
cannot put parentheses around an assignment in Python; grouping parens 
can only be used in expressions, and assignment isn't an expression in 
Python.

</F>



From m.yanowitz at kearfott.com  Fri Nov 17 07:54:05 2006
From: m.yanowitz at kearfott.com (Michael Yanowitz)
Date: Fri, 17 Nov 2006 07:54:05 -0500
Subject: String Replace only if whole word?
Message-ID: <004a01c70a47$7691a240$0d7d12ac@kearfott.com>

Hello:

  I am hoping someone knows if there is an easier way to do this or someone
already implemented something that does this, rather than reinventing the
wheel:
  I have been using the string.replace(from_string, to_string, len(string))
to replace names in a file with their IP address.
  For example, I have definitions file, that looks something like:
10.1.3.4   LANDING_GEAR
20.11.222.4   ALTIMETER_100
172.18.50.138 SIB
172.18.50.138 LAPTOP
172.18.51.32  WIN2000
127.0.0.1 LOCALHOST

  and I have a text file (a Python script) that has these names in the file.
In most cases the string.replace() command works great. But there is one
instance which it fails:
Suppose I had in the file:
 if (LAPTOP_IS_UP()):
   It would replace the string with:
 if ("172.18.50.138"_IS_UP()):

   Is there any easy way to avoid this, only replace if a whole word
matches?
I probably need something which determines when a word ends, and I will
define
 a word as containing only 'A'-'Z','a'-'z','0'-'9','_' . As long as the
string
contains more of the word digits after the match, don't replace?

Thanks in advance:
Michael Yanowitz




From luismgz at gmail.com  Wed Nov 15 16:16:53 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 15 Nov 2006 13:16:53 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163605059.270769.293290@m73g2000cwd.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
Message-ID: <1163625413.429778.256420@f16g2000cwb.googlegroups.com>


walterbyrd ha escrito:

> Luis M. Gonz?lez wrote:
> > the new crop of web frameworks (Django, Turbo Gears, etc...).
> >
> > > - Newer versions of mod_python require Apache 2.0, which few hosters
> > > have
> >
> > You can also get alder versions of mod_python. What's the problem?
>
> The problem is that the system requirements for django and turbogears
> are sky-high. I think Django requires Apache 2.0 (and maybe mod_python
> 3.x), and CherryPy (part of turbogears) requires Python 2.4. If you are
> developing for a hosted environment, this can be a big problem. Few
> enough hosters provide python to begin with, then add to that such
> requirements as apache 2.0 - and you left with almost nothing.

You are right.
Although this is not a problem to me, because I just use bare-bones
mod_python, with no framework on top of it.
Not many people know that mod_python comes with its own built-in
handlers suitable for different programming styles, such as PSP
(similar to php) or publisher (M-V-C style).

Luis



From kw at kevin-walzer.com  Mon Nov 13 16:23:21 2006
From: kw at kevin-walzer.com (Kevin Walzer)
Date: Mon, 13 Nov 2006 16:23:21 -0500
Subject: ANN: Martin Franklin's Tile/Tablelist Tkinter wrappers now at
	SourceForge
Message-ID: <4558E249.6050109@kevin-walzer.com>

I have posted Martin Franklin's Tkinter wrappers for the TableList
package (http://www.nemethi.de/) and the Tile theming extension
(http://tktable.sourceforge.net/tile/) at SourceForge.

Mr. Franklin previously hosted these wrappers at the URL's below:

http://mfranklin.is-a-geek.org/docs/TableList/index.html
http://mfranklin.is-a-geek.org/docs/Tile/index.html

Mr. Franklin had previously announced the wrappers on these lists:

http://mail.python.org/pipermail/tkinter-discuss/2005-January/000302.html
http://mail.python.org/pipermail/tkinter-discuss/2005-March/000365.html

His licensing terms were not explicit, but my reading of the threads
indicates he intended the wrappers to be freely reusable.

I had downloaded the extensions several months ago, intending to try
them out. Since then  Mr. Franklin's site seems to have gone offline,
and the extensions are not available elsewhere. Because they are the
best-available Tkinter wrappers for these two powerful Tk extensions, I
have made them available at a SF site I maintain for various Tk
extensions. The download link is below:

https://sourceforge.net/project/showfiles.php?group_id=165637&package_id=211496&release_id=463359

At present I have only posted the extensions themselves. The only
documentation is that provided by Mr. Franklin in his source code. After
I spend more time using these extensions in an application I am
developing, I will probably update the package with additional
documentation.

If I have misstepped by making these extensions available at SF, I
invite Mr. Franklin to contact me on- or off-list.

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


From icetortoise at gmail.com  Thu Nov 23 03:58:28 2006
From: icetortoise at gmail.com (Andy)
Date: 23 Nov 2006 00:58:28 -0800
Subject: How do I find possible matches using regular expression?
Message-ID: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>

Hi there,

I'm trying to do some predicting work over user input, here's my
question:

for pattern r'match me', the string 'no' will definitely fail to match,
but 'ma' still has a chance if user keep on inputting characters after
'ma', so how do I mark 'ma' as a possible match string?

Thanks a lot,

Andy



From tim.hochberg at ieee.org  Sat Nov 18 12:41:39 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Sat, 18 Nov 2006 10:41:39 -0700
Subject: numpy: frequencies
In-Reply-To: <1163860300.030311.100110@j44g2000cwa.googlegroups.com>
References: <ejn3dh$b7n$1@news.albasani.net>
	<1163860300.030311.100110@j44g2000cwa.googlegroups.com>
Message-ID: <ejngkl$l9c$1@sea.gmane.org>

Filip Wasilewski wrote:
> robert wrote:
>> I have an integer array with values limited to range(a,b) like:
>>
>> ia=array([1,2,3,3,3,4,...2,0,1])
>>
>> and want to speedly count the frequencies of the integers into get a density matrix.
>> Is this possible without looping?
> 
> See numpy.bincount (for integers >= 0) if you mean 'without writing
> looping code in Python' or please specify your question.
> 
>> Question 2: is it possible to compute a "moving maximum" without python looping
>>
>> ia=array([4,2,1,5,3,2,2,0,1,1])
>> -> mvmax(ia,3) ->
>>          [4,4,4,5,5,5,3,2,2,1])
> 
> I haven't seen a ready solution but this can be easily converted into
> Pyrex/C looping.

I don't know a way to avoid looping entirely, but there are ways that 
you can loop over the width of the window (in this case 3) rather than 
over the entire array. Since the window width is generally small 
compared to the array, this will probably be fast enough. The tricky 
part is to get the value right at the edges, since what you do there 
depends on what boundary conditions you apply.

The general idea is this:

result = ia[n-1:]
for i in range(n-1):
     numpy.maximum(result, ia[i:-n+i], result)

This punts on dealing with the ends (and I haven't tested this version), 
but should give you the idea.

-tim



From durumdara at gmail.com  Fri Nov 10 03:38:52 2006
From: durumdara at gmail.com (durumdara)
Date: Fri, 10 Nov 2006 09:38:52 +0100
Subject: Localized (international) informations on WXP
Message-ID: <45543A9C.9080208@gmail.com>

Hi !

WXP, Py2.4.3.

I want to get localized informations like month names, format 
parameters, etc.

But nl_langinfo is not exists.

Have the Python a way to get these informations in uniformed way (like 
php) to avoid multiplatform problems ?

Thanks for help:
dd



From noone at nowhere.com  Tue Nov 14 08:32:43 2006
From: noone at nowhere.com (Josh)
Date: Tue, 14 Nov 2006 08:32:43 -0500
Subject: sqlite3 views, if not exists clause
Message-ID: <4559c572$0$560$b45e6eb0@senator-bedfellow.mit.edu>

Hi,
I'm running into a problem when trying to create a view in my sqlite 
database in python. I think its a bug in the sqlite3 api that comes with 
python 2.5.

This works as expected:
  conn = sqlite3.connect(':memory:')
  conn.execute("create table foo (a int,b int)")
  conn.execute('create view bar as select * from foo')

This fails as expected:
  conn = sqlite3.connect(':memory:')
  conn.execute("create table foo (a int,b int)")
  conn.execute('create view bar as select * from foo')
  conn.execute('create view bar as select * from foo')
with exception "sqlite3.OperationalError: table bar already exists".
Weird that it fails with TABLE bar already exists, but this is the message 
that sqlite actually returns so it is not python's fault.

THIS DOES NOT WORK, but it should!
  conn = sqlite3.connect(':memory:')
  conn.execute("create table foo (a int,b int)")
  conn.execute('create view if not exists bar as select * from foo')
it fails with exception "sqlite3.OperationalError: near "not": syntax error"

Can anyone confirm, or pass this on to the appropriate person?
Thanks!
Josh





From E.Doxtator at gmail.com  Wed Nov 15 19:01:41 2006
From: E.Doxtator at gmail.com (E.Doxtator at gmail.com)
Date: 15 Nov 2006 16:01:41 -0800
Subject: pyRTF and Footers
In-Reply-To: <mailman.214.1163634758.32031.python-list@python.org>
References: <1163632090.351315.19480@h48g2000cwc.googlegroups.com>
	<mailman.214.1163634758.32031.python-list@python.org>
Message-ID: <1163635301.052084.93340@b28g2000cwb.googlegroups.com>


Gabriel Genellina wrote:
> At Wednesday 15/11/2006 20:08, E.Doxtator at gmail.com wrote:
>
> >I've been using the pyRTF module to generate some documents that I need
> >for work.  In general, the module is good, and pretty simple to use.
> >However, I am running into a problem with footers that doesn't quite
> >make sense to me.
>
> First, I don't use pyRTF. The app sketch and code snippet you have
> posted look reasonable.

Thanks :)

> At least using Word, you can configure a page footer for each section
> in the document, so I think it should be posible.

I edited the document in Word without problems.  I put in several
different footers into my generated RTF document.

> If you don't get the output you want, it may be a bug in the module,
=:-O

> you are using it in the wrong way,

This is a possibility.  I took a look at the raw RTF text, and the
multiple footers are in the text.  I'm going to have to edit the
document with word and compare it to the original to see what the
difference is, I guess.

>...the feature is unsupported, etc.

Say it ain't so!

> but most likely not a bug in Python itself.
=:-O

> So a better place to ask  would be... well, it appears there is no better place except asking
> the author directly :)

Anyone got his number?

> (BTW, thanks for pointing me towards pyRTF - it may be useful, so
> I'll give it a try...)

It's very useful.  I can see several applications in my job where I can
use this module.

Thanks

-Doc



From tleeuwenburg at gmail.com  Wed Nov 29 00:27:43 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 28 Nov 2006 21:27:43 -0800
Subject: 6 Pick Bet Grouping
In-Reply-To: <1164777870.480711.28130@l12g2000cwl.googlegroups.com>
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
	<1164777870.480711.28130@l12g2000cwl.googlegroups.com>
Message-ID: <1164778063.164978.117930@j72g2000cwa.googlegroups.com>

It seems straightforward:

1 / X / X ...
and
4 / X / X ...

becomes 1 + 4 / X / X

If there were a 6 / X / X it would become 1 + 4 + 6 / X / X

I think this means that all possible combinations for any particular
amount may be grouped together in a single ticket.

Cheers,
-T



From blye at telkomsa.net  Thu Nov  9 04:35:38 2006
From: blye at telkomsa.net (bli)
Date: 9 Nov 2006 01:35:38 -0800
Subject: win32com/python different behavour.
Message-ID: <1163064938.384105.145290@m73g2000cwd.googlegroups.com>

I have been developing an application driving a device through COM. I
used win32com (brilliant )
and was at a fairly advanced stage being able to access the functions
of the device and access/ retrieve its data.
A week or two ago I did some overdue upgrading to all the components of
the application.win32com, python to 2.4.4 and wxpy to latest.
Then the problem began (I think!).
My app still accesses the device and some functions still perform as
expected. Howeve some important data retrieval functions now behave
very differently.
Initially a tuple was returned, which was made into a list. This tuple
returned (true,'1234xyz'), the first element was the success or failure
of the operation, the second the required data.
Now all these functions return only the boolean, True or False.
I cannot seem to produce the tuple that initially worked extremely
well.

eg. initially

xx.GetMACAddr(param1,param2)  <-- params as per 'intellisense' would
return
(True,'123xyz')

now
xx.GetMACAddr(param1,param2)  returns
True    (type boolean)

I have exhausted my relative inexperience on this one.
Any Ideas  BTW VB extracts the data just fine , so I dont think that
the Device or firmware is at fault here.
Python has been great so far, I trust this problem is an oversight on
my part.

Thanks in keen anticipation for any ideas to get over this one!!

I am in the middle of returning to Python 2.4.3 just to be sure that
this is not the issue.



From NikitaTheSpider at gmail.com  Wed Nov 29 15:52:02 2006
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Wed, 29 Nov 2006 20:52:02 GMT
Subject: Python program that validates an url against w3c markup validator
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
Message-ID: <NikitaTheSpider-1B6672.15520129112006@news-rdr-02-ge0-1.southeast.rr.com>

In article <1164778181.910135.53070 at j44g2000cwa.googlegroups.com>,
 "yaru22" <yaru22 at gmail.com> wrote:

> I'd like to create a program that validates bunch of urls against the
> w3c markup validator (http://validator.w3.org/) and store the result in
> a file.
> 
> Since I don't know network programming, I have no idea how to start
> coding this program.
> 
> I was looking at the python library and thought urllib or urllib2 may
> be used to make this program work.
> 
> But I don't know how to send my urls to the w3c validator and get the
> result.
> 
> Can anyone help me with this? or at least give me a hint?
> 
> Thank you so much.

This article might be of help:
http://www.standards-schmandards.com/2005/massvalidate

"Periodically you may want to make sure your entire website validates. 
This can be a hassle if your site is big. In this article we introduce a 
few python scripts which will help us do mass validation from a list of 
links. We will also modify the W3C validator to work the way we want."

You might also be interested in my validating spider (see my sig) which 
will validate an entire site for you but that won't teach you a thing 
about Python programming.  ;)

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


From richie at entrian.com  Thu Nov 30 08:50:29 2006
From: richie at entrian.com (Richie Hindle)
Date: Thu, 30 Nov 2006 13:50:29 +0000
Subject: PythonTidy
In-Reply-To: <ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
	<ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
Message-ID: <17otm214our9h90b3rh0aj86ljvv29a15o@4ax.com>


[Roberto]
> # vim: set fileencoding=utf-8 :
> ...
> # -*- coding: utf-8 -*-
> ...
> About changing the encoding declaration from vim-style to emacs-style:
> I'll take it as an insult :)

[Laurent]
> This is not "emacs-style", this is Python normalized source encoding
> directive for correct interpretation of u"..." strings by Python
> interpreter.

So is "# vim: set fileencoding=utf-8".  Anything matching
"coding[:=]\s*([-\w.]+)" on the first or second line counts.

> See http://www.python.org/dev/peps/pep-0263/

Yes, you should.  8-)

-- 
Richie Hindle
richie at entrian.com


From alan.franzoni.xyz at gmail.com.invalid  Sun Nov 19 06:33:39 2006
From: alan.franzoni.xyz at gmail.com.invalid (Alan Franzoni)
Date: Sun, 19 Nov 2006 12:33:39 +0100
Subject: A python IDE for teaching that supports cyrillic i/o
References: <mailman.430.1163877551.32031.python-list@python.org>
Message-ID: <i53421v27yla$.rrj9sefsk84d.dlg@40tude.net>

Kirill Simonov  si ? divertito a scrivere:

> Unfortunately, most IDEs I tried failed miserably in this respect.  My
> test was simple: I've run the code
>     name = raw_input("What's your name? ")  # written in Russian
>     print "Hello, %s!" % name               # in Russian as well
> both from the shell and as a standalone script. This either caused a
> UnicodeError or just printed invalid characters.

I highly dislike asking stupid questions, and this might be stupid
indeed... but did you write

# -*- coding: iso-8859-5 -*-

or

# -*- coding: koi8_r -*-

(they both seem suited to the Russian language, but I don't know the
difference)

as the first line in your .py file?

Personally, I use Eclipse+Pydev (a bit steep to learn at the beginning, and
quite memory and cpu hogging since it's a java-based ide; don't use it on
old/slow computers with less than 512MB RAM, and don't use version < 3.2
either) and it uses that very line to recognize the actual character set
employed. You may check with other encodings as well.

http://docs.python.org/lib/standard-encodings.html

It does work on Windows indeed.

UPDATE:
I tried with Eclipse+Pydev, and using koi8_r I seems to be able to simply
copy&paste a piece of the ixbt.com homepage in the editor I can save and
use it correctly.


-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From DustanGroups at gmail.com  Sat Nov 25 18:03:44 2006
From: DustanGroups at gmail.com (Dustan)
Date: 25 Nov 2006 15:03:44 -0800
Subject: a -very- case sensitive search
In-Reply-To: <1164490795.866046.133230@45g2000cws.googlegroups.com>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
Message-ID: <1164495824.540112.117410@l12g2000cwl.googlegroups.com>


Ola K wrote:
> Hi,
> I am pretty new to Python and I want to make a script that will search
> for the following options:
> 1) words made of uppercase characters -only- (like "YES")
> 2) words made of lowercase character -only- (like "yes")
> 3) and words with only the first letter capitalized (like "Yes")
> * and I need to do all these considering the fact that not all letters
> are indeed English letters.
>
> I went through different documention section but couldn't find a right
> condition, function or method for it.
> Suggestions will be very much appriciated...
> --Ola

I'm not sure exactly what you mean by "considering the fact that not
all letters are indeed English letters"; you could mean you don't care
about the non-english characters, or you could mean you don't want any
non-english characters at all (so the function should return False in
that case). If the case is the former, there's a simple test for each:

>>> word = 'hi'
>>> word.upper() == word # evaluates to True if the word is all caps
False
>>> word.lower() == word # evaluates to True if the word is all lowercase
True
>>> word.title() == word # evaluates to True if the word is in a title format
False
>>>



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 25 10:07:00 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Nov 2006 02:07:00 +1100
Subject: Graph Data Structures
References: <mailman.714.1164463530.32031.python-list@python.org>
Message-ID: <pan.2006.11.25.15.07.00.219750@REMOVE.THIS.cybersource.com.au>

On Sat, 25 Nov 2006 14:05:27 +0000, Nathan Harmston wrote:

> Hi All,
> 
> Currently I am working on a generic graph library  so I can do various
> graph based analysis for various projects I have ideas for. Currently
> I am implementing Graph as a wrapper around a dictionary. Currently my
> implementation works like this:

[snip]

http://www.python.org/doc/essays/graphs.html

http://mail.python.org/pipermail/python-list/2002-April/137593.html


Hope this helps.


-- 
Steven.



From martin at v.loewis.de  Tue Nov  7 15:55:10 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Nov 2006 21:55:10 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162928970.223276.72600@h48g2000cwc.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
Message-ID: <4550F2AE.1010205@v.loewis.de>

Ross Ridge schrieb:
> Martin v. L?wis wrote:
>> How would you propose to fix file_repr to prevent such
>> a race condition?
> 
> The race condition you describe is different from the one Joe Seigh
> described.  It's caused because without GIL access to the file object
> is no longer thread safe, not because reference counting isn't thread
> safe.

Joe's claim (quoting him) was: "Atomic increment and decrement
instructions are not by themselves sufficient to make reference
counting safe."

Rephrasing this in Python terms is "if the GIL is dropped and
incref/decref are made atomic, the reference counting is not
automatically thread-safe". This is what my example demonstrates:
Drop the GIL, and assume an atomic inc/dec, and it won't be
thread-safe.

It's not that the file object becomes thread-unsafe. Instead,
access to the f_name property won't work anymore (as would
access to any other PyObject* field).

You still didn't say what you would suggest to make it thread-safe
again; most likely, you proposal would be to add locking. If I
understand Joe's approach correctly, he has a solution that does
not involve locking (although I don't understand how it works).

Regards,
Martin


From sjmachin at lexicon.net  Wed Nov 22 05:03:00 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 02:03:00 -0800
Subject: file backup in windows
In-Reply-To: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
Message-ID: <1164189780.801077.178010@b28g2000cwb.googlegroups.com>

k.i.n.g. wrote:
> Hi ALL,
>
> I am a newbee programmer and started of with python recently. I am
> trying write a script which backups outlook (.pst ) files everytime I
> shutdown my system. I have writtern following code after some findings
> on net. My .pst file path is as follows
>
> " c:\documents and settings\060577\Local Settings\Application
> Data\Microsoft\Outlook "
> where 060577 represents username. I want my script to identigy the user
> logged in and go to the resp outlook folder or should be able to read
> outlook store directory path from registry and the copy the files to
> the desired path.
>
> ---------------------------------------------------
> how can i make the following code work, I have probelm with filepath
> declaration.
> ---------------------------------------------------
> import os, shutil
> filepath = ' C:\\Documents and Settings\\060577\\Local
> Settings\\Application Data\\Microsoft\\Outlook\\* '
> backup = ' D:\\temp\\outlook '

Aside: having a space at the beginning and/or end of the filename has
no good effect and may cause problems, so don't do it.

> os.system ("xcopy /s %s %s" % (filepath, backup))
> -----------------------------------------

It's always a good idea *before* you write an os.system call on *any*
operating system to try a few sample commands at the command line. You
would find in this case that the problem exists there too -- it has
nothing to do with Python. The problem is that the first argument
*contains* spaces, but the Windows command processor splits the command
line on spaces, so it thinks the first argument is  'C:\\Documents'. On
both the command line and in your script, you will need to wrap quotes
around each argument that does/could contain spaces.

[untested]
os.system ('xcopy /s "%s" "%s"' % (filepath, backup))

Hint: you should find it easier using raw strings for Windows
filenames:
    backup = r'D:\temp\outlook'

HTH,
John



From robert.kern at gmail.com  Mon Nov 13 17:08:38 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 13 Nov 2006 16:08:38 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558DBEF.8010409@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>	<ej2pa2$vpq$1@sea.gmane.org>	<4554ECBF.7040603@hobbshouse.org>	<ej35ue$52k$1@sea.gmane.org>	<4558BEC3.3020003@hobbshouse.org>	<ejags8$l2u$1@sea.gmane.org>	<4558D443.1030802@hobbshouse.org>	<ejakm2$44p$1@sea.gmane.org>
	<4558DBEF.8010409@hobbshouse.org>
Message-ID: <ejaqdh$q8v$1@sea.gmane.org>

Michael Hobbs wrote:
> True enough. Although, I have to ask how many times you define a new 
> function only to have Python spit a syntax error out at you saying that 
> you forgot a colon. It happens to me all the time. (Usually after an 
> "else") If you'd never notice that the colon was missing if the compiler 
> didn't point it out, is it really that readable? For me, I tend to get 
> annoyed at language "features" that I'm constantly tripping over.

Never.

-- 
Robert Kern

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



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 25 00:59:48 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 25 Nov 2006 16:59:48 +1100
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<16651e80611242126u55685813u7d77f299c738963e@mail.gmail.com>
	<mailman.703.1164432447.32031.python-list@python.org>
Message-ID: <pan.2006.11.25.05.59.48.69507@REMOVE.THIS.cybersource.com.au>

On Sat, 25 Nov 2006 00:27:24 -0500, Jerry Hill wrote:

> On 11/25/06, Jerry Hill <malaclypse2 at gmail.com> wrote:
>> On 23 Nov 2006 15:09:11 -0800, tleeuwenburg at gmail.com
>> <tleeuwenburg at gmail.com> wrote:
>> > Yes, it's true that you can't resell copies of The Python Papers for
>> > personal profits, but you may derive from it, reproduce and propagate
>> > it. You're quite right to point it out.
>>
>> My problem with this is that I can't use anything in your publication
>> when working on commercial software.  If I were to derive code from
>> something in the Python Papers, my understanding is that I would be
>> obligated to release it under a Creative Commons license.  In fact,
>> even if all I do is read an article and then incorporate concepts from
>> it in my code, my understanding is that I may be creating a derivative
>> work.

And how do you think this is different from any other publication? That
Python Papers is under a CC licence is a red-herring. 


>> Since the code that I write for work belongs to my employer, and may
>> someday be sold, I need to be careful about the licensing issues. They
>> might not be very happy with me if I wrote software for them that
>> ended up being encumbered with a license they didn't like.

Again, how is this different from any other publication? Unless you only
read public domain publications, anything you read is copyrighted, and
your arguments apply just as much -- perhaps more so -- depending on the
licence of that publication.


-- 
Steven.



From theller at ctypes.org  Thu Nov 30 15:50:25 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 30 Nov 2006 21:50:25 +0100
Subject: PythonTidy
In-Reply-To: <20061130024509.GA8961@loki>
References: <20061130024509.GA8961@loki>
Message-ID: <ekng6f$irr$1@sea.gmane.org>

Chuck Rhode schrieb:
> I couldn't find a routine to clean up, regularize, and reformat Python
> code, so I wrote one:
> 
>   http://www.lacusveris.com/PythonTidy/PythonTidy.python
> 
> Now, I'm looking for beta-testers.  Compensation is a bit on the low
> side.  In fact it's limited to the satisfaction of helping out.
> Thanks.
> 
This looks very good, to me.  The two things that bother me
at the moment are how the comments are formatted (dunno if that can be
customized or changed easily), and it would be good if the script took
command line args instead of working as a filter only.

Thanks,
Thomas



From horpner at yahoo.com  Fri Nov 10 08:17:35 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 10 Nov 2006 14:17:35 +0100
Subject: comparing Unicode and string
References: <1161005167.295259.290800@m7g2000cwm.googlegroups.com>
	<1161281095.174018.223790@f16g2000cwb.googlegroups.com>
	<mailman.830.1161338118.11739.python-list@python.org>
	<1161595714.342067.51350@e3g2000cwe.googlegroups.com>
	<pan.2006.10.23.10.15.24.383843@gmx.net>
	<1163120577.369133.279080@h48g2000cwc.googlegroups.com>
Message-ID: <slrnel8v1a.1r8.horpner@FIAD06.norwich.edu>

On 2006-11-10, luc.saffre at gmail.com <luc.saffre at gmail.com> wrote:
> Marc 'BlackJack' Rintsch wrote:
>> Why?  Python strings are *byte strings* and bytes have values in the range
>> 0..255.  Why would you restrict them to ASCII only?
>
> Because getting an exception when comparing a string with a unicode
> string is irritating.
>
> But I don't insist on my PEP. The example just shows just
> another pitfall with Unicode and why I'll advise to any
> beginner: Never write text constants that contain non-ascii
> chars as simple strings, always make them Unicode strings by
> prepending the "u".

That doesn't do any good if you aren't writing them in unicode
code points, though.

-- 
Neil Cerutti
To succeed in the world it is not enough to be stupid, you must also
be well-mannered. --Voltaire


From harry.g.george at boeing.com  Mon Nov 13 09:49:54 2006
From: harry.g.george at boeing.com (Harry George)
Date: Mon, 13 Nov 2006 14:49:54 GMT
Subject: Python development time is faster.
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
Message-ID: <xqxodrbs8od.fsf@cola3.ca.boeing.com>

"Chris Brat" <chrisBrat at gmail.com> writes:

> I've seen a few posts, columns and articles which state that one of the
> advantages of Python is that code can be developed x times faster than
> languages such as <<Insert popular language name here>>.
> 
> Does anyone have any comments on that statement from personal
> experience?
> How is this comparison measured?
> 
> 
> Thanks
> Chris
> 

Personal experience takes two forms.

1. Broad experience with languages, such that doing a single project
   in a new language gives a sense of the relative power and
   ease-of-use.  Everyone I know who is a strong Python supporter took
   that route.  There was an Ahh-Ha experience part way into the first
   project.  This includes folks who could charitably be called
   curmudgeons, and people who are truely fluent in, say, C++ or Lisp.

   For these people the main success factor is that "it just works".
   You spend time on new functionality, or experimenting with
   alternative algorithms, not on debugging.  Of course, we work in a
   regression-test-driven world, so we don't pile up a lot of untested
   code and then hope for the best.  Python facilitates that
   test-early-test-often approach with its modularity and fast
   edit-run cycle.

2. Write the same thing in 2 or more languages.  Due to machine
   migrations and project redirections I have done that with
   perl-and-python, java-and-python, modula3-and-python,
   lisp-and-python.  In all cases, python was the second language, so
   there is some learning curve to be adjusted for (i.e., I understood
   the semantics better).  However, since I've done some
   perl-and-perl, and lisp-and-lisp, I can maybe make that adjustment.

   The result was that python was relatively faster-to-develop.  I
   can't give a specific speedup factor, but I sure can say Python is
   now my default language.  The success factors were:

   a) Once you get the hang of the language (a weekend?), you can
   write without reference to the manuals.  Or if you do reference, it
   is a quick lookup.  No struggling to figure out how to code
   something.  Or to decypher what a line of code actually does.

   b) The project doesn't bog down as you add features.  The language
   can accomodate new paradigms, patterns, or major functionality.  If
   you do need to refactor, that is easy too.  

   c) Peer code reviews are easy -- both you and the reviewers can
   understand the code's intent at a glance.


-- 
Harry George
PLM Engineering Architecture


From fredrik at pythonware.com  Wed Nov 22 10:49:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 16:49:45 +0100
Subject: file backup in windows
References: <1164186831.851341.25760@m73g2000cwd.googlegroups.com>
	<mn.b3e37d6b39064fe7.46195@XX.XmclaveauX.com>
Message-ID: <ek1rip$t3f$1@sea.gmane.org>

"MC" wrote:

> " are your friend.

to be precise, list2cmdline is your friend.  see discussion and examples here:

http://effbot.org/pyfaq/why-can-t-raw-strings-r-strings-end-with-a-backslash.htm

</F> 





From hg at nospam.com  Wed Nov 29 13:02:59 2006
From: hg at nospam.com (hg)
Date: Wed, 29 Nov 2006 12:02:59 -0600
Subject: pyxpcom
In-Reply-To: <mailman.841.1164819170.32031.python-list@python.org>
References: <QhHah.226$YX1.85@newsfe23.lga>	<mailman.809.1164736366.32031.python-list@python.org>	<cg%ah.268$Gf6.11@newsfe21.lga>	<mailman.816.1164752199.32031.python-list@python.org>	<sbgbh.3034$YX1.1371@newsfe23.lga>
	<mailman.841.1164819170.32031.python-list@python.org>
Message-ID: <V3kbh.798$631.478@newsfe22.lga>

Trent Mick wrote:
> hg wrote:
>> Trent Mick wrote:
>>>> My need is as follows: I have developed an activex component to
>>>> access a
>>>> smart card on the client side / do some web site logon.
>>>>
>>>> Are xpcom / pyxpcom advanced/stable enough for such an implementation
>>>> under Linux / Windows ?
>>> You mean to provide the equivalent functionality for Firefox that your
>>> activex component does for IE? Yes, xpcom and pyxpcom are quite stable,
>>> however putting together a Firefox extension that gets PyXPCOM itself up
>>> and running in a client's Firefox install will be quite challenging.
>>>
>>> Trent
>>>
>> Exactly ... are you saying I need to distribute Firefox compiled
>> differently in order to achieve that ?
> 
> No. But you'll have to get comfortable building your own Firefox and
> then building the PyXPCOM extension and then packaging the built PyXPCOM
> bits that a normal Firefox install does not have already into a Firefox
> extension. This would also mean packaging up parts of a Python build and
> possible needing to have a custom Python build to (1) get shared library
> loading to work correct and (2) ensure there isn't crosstalk between the
> python that PyXPCOM uses and possibly other Python installations on the
> target machine.
> 
>> This is less a python issue clearly if that is the case: would I have
>> the same issues to resolve if I were to write the module in C++ ?
> 
> A little, yes: I believe you'd need a Firefox build in a development
> tree to build a vanilla C++ XPCOM component. However, I am not sure of
> that.
> 
> Mostly, no: You wouldn't need to worry about all the PyXPCOM/Python
> build/install issues.
> 
> 
> Trent
> 
Thanks Trent,

I'll do some testing and bug Mark in the process I'm sure  :-)

Regards,

Philippe


From __peter__ at web.de  Mon Nov 27 03:32:19 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 27 Nov 2006 09:32:19 +0100
Subject: Pending: A Mixin class for testing
References: <456a1929$1@nntp0.pdx.net>
Message-ID: <eke7p9$2qv$02$1@news.t-online.com>

Scott David Daniels wrote:

> Here is a Mix-in class I just built for testing.
> It is quite simple, but illustrates how Mixins
> can be used.
> 
>      class Pending(object):
>          _pending = iter(())
>          def __new__(class_, *args, **kwargs):
>              try:
>                  return class_._pending.next()
>              except StopIteration:
>                  return super(Pending, class_).__new__(class_,
>                                                 *args, **kwargs)
> 
> Now for the use:
> 
>      class Float(Pending, float): pass
> 
>      Float._pending = iter(range(4,7))
> 
>      print [Float(x*(x+1)//2) for x in range(6)]
> 
> Possibly by using itertools functions such as chain as in:
>      Klass._pending = itertools.chain(generate_some(), Klass._pending)
> you can inject fixed values to simplify testing.

If you're willing to allow for issubclass() to fail you can do without a
mixin:

from itertools import chain, repeat

def preload(class_, iterable):
    items = chain(
        (lambda *args, **kw: item for item in iterable), repeat(class_))
    return lambda *args, **kw: items.next()(*args, **kw)

float = preload(float, "ABC")
print [float(x) for x in range(6)]
issubclass(float, float) # TypeError

Argh :-)

Peter


From mnations at gmail.com  Sun Nov  5 12:22:06 2006
From: mnations at gmail.com (Mudcat)
Date: 5 Nov 2006 09:22:06 -0800
Subject: python GUIs comparison (want)
In-Reply-To: <7xy7qql7i7.fsf@ruckus.brouhaha.com>
References: <1161666459.401958.267280@i42g2000cwa.googlegroups.com>
	<453E3370.9060008@kevin-walzer.com>
	<1162657420.655675.185930@e3g2000cwe.googlegroups.com>
	<454d73ab@quokka.wn.com.au>
	<1162708081.974808.283370@i42g2000cwa.googlegroups.com>
	<7xy7qql7i7.fsf@ruckus.brouhaha.com>
Message-ID: <1162747326.717224.236010@i42g2000cwa.googlegroups.com>


Paul Rubin wrote:

>
> No that would suck.  Best to try to stay as close as possible to the
> native widgets on whatever the underlying platform is.  If you want
> to depart from the native UI, then start from scratch and write a whole
> new window system with a complete app suite etc.

Ok. But other than thinking it would suck, you're basically repeating
my point about starting from scratch with a whole new suite of widgets.


I think there are situations where having an app that looks completely
different is a big bonus. Having developed apps for both engineers and
non-technical people alike, sometimes the non-techs are much more
impressed by the look/feel than what it actually does.

Sometimes you want a tool that blends in. Sometimes you want one that
stands out, especially when you're competing against other tools where
they all kind of look the same.



From sjmachin at lexicon.net  Sun Nov 26 04:35:54 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 01:35:54 -0800
Subject: problem about list indexing
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
Message-ID: <1164533754.269071.149590@n67g2000cwd.googlegroups.com>

hollowspook wrote:
> Hi, there
>
> a = range(100)
>
> if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7],
> a[11], a[56], a[90]].
> Is there any other way?
>

I presume a = range(100) is just an indication that a is a list -- the
literal answer to your question as asked is simply [7, 11, 56, 90]

In the general case that a is *any* list (or anything else that
supports the index protocol, e.g. a string, a tuple, an array.array
instance, or some instance of a so-written class), you can use a "list
comprehension". Example:

| >>> a = 'qwertyuiopasdfghjklzxcvbnm'
| >>> [a[x] for x in [25, 0, 13, 1]]
| ['m', 'q', 'f', 'w']

Do try and find "list comprehension" in the manual and in your book or
tutorial. It's useful for much more than the above.

HTH,
John



From belred at gmail.com  Sat Nov 11 21:19:59 2006
From: belred at gmail.com (Bryan)
Date: Sat, 11 Nov 2006 18:19:59 -0800
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<mailman.2014.1163123991.11739.python-list@python.org>
	<1163124577.908610.122310@e3g2000cwe.googlegroups.com>
	<32822fe60611100649o6c567e09xd78fdfb65486ff6f@mail.gmail.com>
Message-ID: <ej608m$4kj$1@sea.gmane.org>

Jorge Vargas wrote:


> 
> the pyc files are just a "catching" system for the common python
> developer, as for the java developer the .class files are executable
> code. In python noone runs the pyc files, the interpreter takes care
> of this for you.
> 

this is an incorrect statement.  we (the company i work for) only ship the
pyc files, and our customers _only_ run the pyc files.  and our embedded
python contains no .py files.  from our perspective,  java .class files and
python .pyc files are treated exactly the same.  and there is very little
difference between jar files containing .class files and zip files
containing .pyc files.


bryan



From adrian.casey at internode.on.net  Wed Nov 15 06:32:53 2006
From: adrian.casey at internode.on.net (Adrian Casey)
Date: Wed, 15 Nov 2006 21:02:53 +0930
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>
	<12lj35aqa9drd8a@corp.supernews.com>
	<slrnelj996.paq.nick@irishsea.home.craig-wood.com>
Message-ID: <12llun7ipasjs16@corp.supernews.com>

Nick Craig-Wood wrote:

> Adrian Casey <adrian.casey at internode.on.net> wrote:
>> > Adrian Casey <adrian.casey at internode.on.net> wrote:
>> > import os, pexpect, threading
>> > 
>> > def runyes():
>> >         print "Running yes command..."
>> >         pexpect.run('yes', timeout=5)
>> > 
>> > t = threading.Thread(target=runyes)
>> > t.start()
>> > t.join()
>> > 
>>  The timeout parameter will not work in this case.  If you run the sample
>>  code above, it will run forever.
> 
> The above runs just fine for me, stopping after 5 seconds.  Did you
> try it?
> 
>>  The 'yes' command presents a class of command which can not be
>>  easily be handled by pexpect.
> 
> Worked for me under Debian/testing.
> 
>> As far as I know, mixing threads and signals is OK provided the
>> parent creates the alarm.
> 
> There are so many pitfalls here that I advise you not to try.  From
> the linuxthreads FAQ
> 
>   J.3: How shall I go about mixing signals and threads in my program?
> 
>   The less you mix them, the better. Notice that all pthread_*
>   functions are not async-signal safe, meaning that you should not
>   call them from signal handlers. This recommendation is not to be
>   taken lightly: your program can deadlock if you call a pthread_*
>   function from a signal handler!
> 
>   The only sensible things you can do from a signal handler is set a
>   global flag, or call sem_post on a semaphore, to record the delivery
>   of the signal. The remainder of the program can then either poll the
>   global flag, or use sem_wait() and sem_trywait() on the semaphore.
> 
>   Another option is to do nothing in the signal handler, and dedicate
>   one thread (preferably the initial thread) to wait synchronously for
>   signals, using sigwait(), and send messages to the other threads
>   accordingly.
> 
> Note also that the signal can be delivered to any thread which
> complicates things.
> 
I'm running Kubuntu 06-06 with python 2.4.3 and the above code runs forever
at 100% cpu utilization.  I shall look into semaphores. However, that means
another thread whose sole purpose is to watch the semaphore.

Thanks for you help.

Cheers.
Adrian.


From cyberco at gmail.com  Sun Nov 19 18:07:03 2006
From: cyberco at gmail.com (cyberco)
Date: 19 Nov 2006 15:07:03 -0800
Subject: edit text in a file and save it again
Message-ID: <1163977623.066968.108060@h54g2000cwb.googlegroups.com>

I must be overlooking something here... I'm trying to edit a line in a
text file. I thought this was easy with fileinput, but all examples do
not write the line back to the file but simply 'print' it. I want to
open the file, edit the line and save it again. Is fileinput the right
module for that?



From bearophileHUGS at lycos.com  Wed Nov 22 19:20:47 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 16:20:47 -0800
Subject: Abelson and Python
In-Reply-To: <1164240649.628193.65300@f16g2000cwb.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164240649.628193.65300@f16g2000cwb.googlegroups.com>
Message-ID: <1164241247.453138.296580@m73g2000cwd.googlegroups.com>

mensanator at aol.com:
> No surprise to anyone who's ever tried to use MIT Scheme.

Be careful, such assertions are often flamebait.

I am using DrPython (I think they were using it at MIT too lately), and
it is very very good IDE, it produces executables on the fly, it has a
visual debugger with some nice graphical things, it manages graphics,
and it has something that I have never seen in Python: it manages a
hierarchy of simpler Scheme languages, useful to learn for students.
Probably something similar may be useful to learn Python too (such
stripped down Python versions can forbid things like  def foo(x=[]):
...). I am appreciating Scheme a bit because of such very good editor
that makes things possible for newbies of the language too.

Bye,
bearophile



From joncle at googlemail.com  Thu Nov  9 10:50:53 2006
From: joncle at googlemail.com (Jon Clements)
Date: 9 Nov 2006 07:50:53 -0800
Subject: extract text from a string
In-Reply-To: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>
References: <1163087125.176931.296440@h54g2000cwb.googlegroups.com>
Message-ID: <1163087453.530685.107840@b28g2000cwb.googlegroups.com>


boris.smir... at gmail.com wrote:

> Hallo all,
>
> I have tried for a couple of hours to solve my problem with re but I
> have no success.
>
> I have a string containing: "+abc_cde.fgh_jkl\n" and what I need to
> become is "abc_cde.fgh_jkl".  Could anybody be so kind and write me a
> code of how to extract this text from that string?

Perhaps if you described what the actual *criteria* is for the
translation; for instance, "I need to keep only letters, numbers and
punctuation characters" etc... Going by your example, it's tempting to
suggest the best method would be string_name[1:-1] and that you don't
need a regex.

Jon.



From chrisBrat at gmail.com  Thu Nov 16 04:44:15 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 16 Nov 2006 01:44:15 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <455c2773$1@news.unimelb.edu.au>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<455c2773$1@news.unimelb.edu.au>
Message-ID: <1163670255.439406.258480@h48g2000cwc.googlegroups.com>


> I do have a wild vision that we can import java libraries (as jar files) into CPython.

Isnt this being achieved by Jython (python code using Java libraries),
and in future by the Java scripting framework added into Java 6 ?



From tomas at fancy.org  Mon Nov 20 17:47:17 2006
From: tomas at fancy.org (Tom Plunket)
Date: Mon, 20 Nov 2006 14:47:17 -0800
Subject: Programmatically replacing an API for another module
Message-ID: <agb4m25v0o0silbl788qc6jqvk2kran4lv@4ax.com>

I've got a bunch of code that runs under a bunch of unit tests.  It'd
be really handy if when testing I could supply replacement
functionality to verify that the right things get called without those
things actually getting called, since frequently those calls take a
long time to execute and do things that, well, I don't really want to
do.

E.g. imagine you've got a routine which takes a filespec, generates a
list of files, and copies those files from one location to another. (I
realize that this example could be multiple functions that should be
tested independently, but please bear with me.)  You don't actually
want to do the file copy, but you want to make sure that the file copy
API is appropriately called.

Using win32com, I might then use win32file.CopyFile, but from testing
code I'd like to replace that with a different call, a test function
that I supply.  Ideally I could replace the whole module, after
importing the module under test, I could do something like 'win32com =
__dict__', and assuming I had a CopyFile function defined in the test
module, it'd hook right in.  However, I'm suspicious that this
wouldn't actually override the win32com seen by the other module that
will actually do the execution (and I don't yet understand Python's
execution model sufficiently).

At present, ModuleTest.py does 'from Module import *' and then makes
calls on Module without the "Module." decoration.  Since typically a
file named SomeClass.py will only define the SomeClass class, this is
more of a convenience than anything.  If this is a barrier to
replacing APIs, though, well, I can change it.

Any insight is helpful, thanks.


-tom!


From proteusguy at gmail.com  Wed Nov  8 07:13:33 2006
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: 8 Nov 2006 04:13:33 -0800
Subject: Python/Django Lead Developer Needed in NYC
Message-ID: <1162988012.999926.55610@h54g2000cwb.googlegroups.com>

    I hope job ads are ok in this group. It looks like my efforts to
make python our base service oriented architecture technology and
Django as the core web framework is coming through. I now need to hire
a New York based developer to be the tech lead for much of this effort.
I can't reveal the company name yet but you've heard of us and this is
a high profile effort.

   If you'd like to apply for the spot, you need to be able to
demonstrate strong python skills and actual usage of Django to build
real systems. This is core infrastructure work so awareness of role
based capabilty authorizations, talking to disparate
services/applications on various platforms (windows & linux), and
general management of complex interconnected systems is going to be
key. Nothing we do will be stand alone.

   We're definitely an Agile shop and are trying to move even further
in that regard. Experience here is a plus as well. You'll need to be
able to work within and extend our new architecture and be able to
clearly specify requirements to other developers. Your team will exist
in New York as well as Bangkok (yes there will be some opportunity to
travel to BKK later) so co-ordinating across time zones means you have
to know what you're talking about and be able to make yourself
understood. Its an issue of delegation and coaching as much as pure
technical ability.

   Please send me your resume, cv, and salary requirements. I will make
sure that all qualified candidates get a response. Thanx for your
consideration,

   -- Ben

PS: I also have python/django positions in Bangkok but you must be a
Thai national and we pay competitive Thai salaries here.



From insyte at gmail.com  Wed Nov 15 17:30:01 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 15 Nov 2006 14:30:01 -0800
Subject: wrapping existing instance in new interface
Message-ID: <1163629801.712734.142370@h54g2000cwb.googlegroups.com>

I am writing a class that subclasses datetime.datetime in order to add
a few specialized methods.  So far the __init__ looks like this:

class myDateTime(datetime.datetime):
    def __init__(self, time, *args, **kwargs):
        if isinstance(time, str):
            timeTuple, tzOffset = self.magicMethod(timeStr)
            datetime.__init__(self, tzinfo=GenericTZ(tzoffset),
**timeTuple)

I would also like to pass in instances of datetime.datetime and have my
class wrap it in the new interface.  Something like this:

mdt = myDateTime(datetime.datetime.now())

I suppose I could do something like this:

    elif isinstance(time, datetime.datetime):
        timetuple = time.timetuple()
        tzoffset = time.utcoffset()
        datetime.__init__(self, tzinfo=GenericTZ(tzoffset),
**timetuple)

However, that feels rather... awkward.  Is there a better/cleaner way?
Perhaps a way to directly wrap my new interface around the passed-in
datetime.datetime instance?

Thanks...

-Ben



From bmichel at gmail.com  Wed Nov 22 10:42:45 2006
From: bmichel at gmail.com (bmichel at gmail.com)
Date: 22 Nov 2006 07:42:45 -0800
Subject: XML Validation in Python using XSV
In-Reply-To: <45646B59.4020908@web.de>
References: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>
	<45644E9A.3030209@web.de>
	<1164202262.974495.289490@f16g2000cwb.googlegroups.com>
	<45645F93.7050907@web.de>
	<1164207925.488546.265120@h54g2000cwb.googlegroups.com>
	<45646B59.4020908@web.de>
Message-ID: <1164210165.311363.203920@k70g2000cwa.googlegroups.com>

This works for me.
You were very helpful, thank you!

Michel

Stefan Behnel wrote:
> bmichel at gmail.com wrote:
> > Stefan Behnel wrote:
> >>> bmichel at gmail.com wrote:
> >>> Stefan Behnel wrote:
> >>>> BTW: any reason you need to use XSV? There are some other libraries out there
> >>>> that can validate XML based on XML Schema and RelaxNG, e.g. lxml. They are
> >>>> much more powerful than XSV.
> >>> No particular reason for XSV
> >>> I just want to validate XML files against an XML schema through Python.
> >>> If you can suggest any other package for debian, I'll be glad to try
> >>> it.
> >> Well, as I said:
> >>
> >> http://packages.debian.org/unstable/python/python-lxml
> >> http://codespeak.net/lxml/
> >>
> >> Just try "apg-get install python-lxml".
> >
> > I've read a bit about lxml, didn't found anything related to validating
> > XML schema...
> >
> > Maybe you can give more details on how to install lxml and use it in
> > Python to validate XML files against an XML Schema
> > I'm going to ask the server administrator to install lxml, so I can't
> > play around a lot with the system trying stuff.
> >
> > It would be nice if you can tell me:
> > - What files to download, where to download them from
> > - How to install it and configure it
> > - How to import the functions in Python
>
> Being able to read can simplify a lot of things these days.
>
> See above to find out how to install lxml on Debian. See the page mentioned
> above to find out how to use lxml. I mean this page:
>
> http://codespeak.net/lxml/
>
> in particular this section:
>
> http://codespeak.net/lxml/#documentation
>
> or simply search that page for things like "XML Schema" or "API documentation".
> 
> Hope that gets you on the right track,
> Stefan



From eurleif at ecritters.biz  Sun Nov 12 18:58:20 2006
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 12 Nov 2006 18:58:20 -0500
Subject: Random image text generation?
In-Reply-To: <mailman.29.1163374250.32031.python-list@python.org>
References: <mailman.21.1163361663.32031.python-list@python.org>	<DaL5h.287$Ib3.250761@news.siol.net>	<mailman.23.1163365020.32031.python-list@python.org>	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>	<4557a186$0$5806$4d3efbfe@news.sover.net>
	<mailman.29.1163374250.32031.python-list@python.org>
Message-ID: <4557b426$0$5794$4d3efbfe@news.sover.net>

Ben Finney wrote:
> Leif K-Brooks <eurleif at ecritters.biz> writes:
> 
>> Steven D'Aprano wrote:
>>> For a text only solution, consider putting up a natural language
>>> question 
>> That wouldn't work as a true CAPTCHA (Completely Automated *Public*
>> Turing test to tell Computers and Humans Apart), since making the
>> list of questions and answers public would defeat its purpose.
> 
> The "Public" part of a CAPTCHA is the algorithm. The data consumed and
> produced by the algorithm don't need to be publicly correlated -- and
> indeed shouldn't be, for exactly the reason you state.

When the CAPTCHA is based entirely on a fixed list of questions and 
answers, I think it's reasonable to treat that list as part of the 
algorithm, since the CAPTCHA couldn't function without it. Similarly, I 
think most people would consider an image-based CAPTCHA for which the 
algorithm but not the fonts were available to be non-public


From mail at microcorp.co.za  Sun Nov 12 06:25:54 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 12 Nov 2006 13:25:54 +0200
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com><455226c0$0$17087$c3e8da3@news.astraweb.com><slrnel6088.tvc.nick@irishsea.home.craig-wood.com><45530513$0$25102$426a74cc@news.free.fr><slrnel6dec.360.nick@irishsea.home.craig-wood.com><mailman.1983.1163089419.11739.python-list@python.org><1163089657.164900.112820@f16g2000cwb.googlegroups.com><mailman.1984.1163090531.11739.python-list@python.org><4rhku3FriokeU2@mid.individual.net><slrnel92ta.1r8.horpner@FIAD06.norwich.edu><4rjlkqFrlskqU1@mid.individual.net><pan.2006.11.10.17.36.56.825161@gmx.net><ej2nrk$qea$2@sea.gmane.org><mailman.2083.1163227355.11739.python-list@python.org>
	<1163295018.712907.20310@m73g2000cwd.googlegroups.com>
Message-ID: <00a501c7064f$747ed280$03000080@hendrik>

"Dan Lenski" <dlenski at gmail.com> wrote:


> Hendrik van Rooyen wrote:
> > "Fredrik Lundh" <fredrik at pythonware.com> wrote:
> >
> > 8<---------------------------------------------------
> > >  >>> color = "blue"
> > >  >>> if color == "red" or "green" or "yellow":
> > > ...     print color, "is red or green or yellow"
> > > ...
> > > blue is red or green or yellow
> >
> > *grin* - this can be construed as a weakness in Python -
> >
> > Even COBOL compilers in the sixties would "add in" the implied
> > "if color = " after each 'or', instead of bloody - mindedly thinking:
> 
> How the heck could this be considered a weakness in Python?  I *like*
> the fact that Python does not do anything "automagical" and rewrite
> expressions, thinking it's smarter than the programmer.  That's one
> reason I got sick of Perl.
> 
> There are plenty of cases where I might want to use an expression like
> "color == red or foo or bar" with the semantics it actually implies in
> Python.  Making an exception for literal strings specifically seems
> reallly dubious given the fact that Python already has an easy way to
> do what you want with the "color in (red, green, blue)" construct.
> This supposedly lacking feature would only be desired by people who
> have been brain-damaged by programming languages like BASIC and
> COBOL... or newbies who haven't programmed enough to really "get"
> Boolean logic.  </rant>
> 
> Dan

I am amazed by the reaction my grin and weakness comment has drawn - 
it looks as if both you and the effbot did not bother to read and try to 
understand the rest of that post, which gave an example of why the python
way is in fact good...

I apologise if my example is meaningless to people whose brains have not been
damaged by experience yet.

- Hendrik





From robert.kern at gmail.com  Sun Nov 26 04:29:36 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 26 Nov 2006 03:29:36 -0600
Subject: Generator question
In-Reply-To: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>
References: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>
Message-ID: <ekbmqg$lip$1@sea.gmane.org>

Timothy Wu wrote:
> Hi,
> 
> Using generator recursively is not doing what I expect:
> 
> def test_gen(x):
>     yield x
>     x = x - 1
>     if x != 0:
>         test_gen(x)

The only thing that the last line does is *create* a new generator object. You
need to actually iterate over it and yield its values. E.g.


In [2]: def test_gen(x):
   ...:     yield x
   ...:     x -= 1
   ...:     if x != 0:
   ...:         for y in test_gen(x):
   ...:             yield y
   ...:
   ...:

In [3]: list(test_gen(3))
Out[3]: [3, 2, 1]


-- 
Robert Kern

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



From nmarais at sun.ac.za  Thu Nov 16 08:48:27 2006
From: nmarais at sun.ac.za (Neilen Marais)
Date: Thu, 16 Nov 2006 15:48:27 +0200
Subject: fast kd-tree or octree implementations for python
Message-ID: <pan.2006.11.16.13.37.25.144794@sun.ac.za>

Hi.

I'm doing a FEM (Finite Elements) code in python. It uses a tetrahedral
mesh to represent the geometry. For post-processing one specifies a list
of 3D coordinates to calculate field values at, which requires the tet
that contains a given point. Right now I'm brute-forcing it checking each
tet for each point, which is very slow on large meshes since the number of
points you are looking for also tend to increase with mesh size.

It seems a kd-tree or octree data-structure will allow me to do lookups in
O(logN) time at the cost of building the data structure in O(N*logN) time.
I am looking for preferably a fast kd-tree implementation with a
GPL-compatible license that is already wrapped for Python, but I'd be
willing to make my own wrappers if needed.

So far I've found CGAL - <http://www.cgal.org> and 
GTS -- The GNU Triangulated Surface Library - <http://gts.sourceforge.net/> .

CGAL has python wrappers but the tree code is under the QPL license (not
GPL compat) while GTS doesn't come with ready-made python wrappers. What
are other good choices?

Thanks
Neilen

-- 
you know its kind of tragic 
we live in the new world
but we've lost the magic
-- Battery 9 (www.battery9.co.za)



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Nov 23 08:54:36 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 23 Nov 2006 14:54:36 +0100
Subject: socket.error connection refused
References: <B58381932.818.38963.1@mxextra>
	<mailman.635.1164284752.32031.python-list@python.org>
	<1164285165.811809.175040@j72g2000cwa.googlegroups.com>
Message-ID: <4slngrF10ij2pU1@mid.individual.net>

Vania wrote:

> IOError: [Errno socket error] (10061, 'Connection refused')

What does "telnet www.google.com 80" in some cmd.exe window say? The
same?

Regards,


Bj?rn

-- 
BOFH excuse #36:

dynamic software linking table corrupted



From gagsl-py at yahoo.com.ar  Mon Nov 20 19:29:22 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 20 Nov 2006 21:29:22 -0300
Subject: Python development time is faster.
In-Reply-To: <1A4BF05172023E468CB6E867923BC90402B6E37D@accmail2.sunbelt. org>
References: <1A4BF05172023E468CB6E867923BC90402B6E37D@accmail2.sunbelt.org>
Message-ID: <7.0.1.0.0.20061120211449.040edc58@yahoo.com.ar>

At Monday 20/11/2006 13:04, Sells, Fred wrote:

>My design goals are for a method to be <10 lines of code and a class
>definition to fit on one printed page (ok, 10pt font ;). I don't always
>achieve these goals, but more often than not.
>
>In order to achieve these goals, I seldom comment and rely on long function
>names and clear variable names.  Perhaps that's a bad thing, but I've found
>that the comments were always obsolete when I picked up someone else's code,
>then they just got in the way.

Docstrings are A Good Thing (TM).
I usually never write silly comments like this:
savedState = state # store the current state
but I always write an explanation when something is not done on the 
"obvious way" or following "common practice" - to prevent the "smart 
guy next door" (myself inclusive) from modifying it later just to 
discover it won't work that other way.
And loop invariants are good comments sometimes.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From tleeuwenburg at gmail.com  Mon Nov 27 18:14:29 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 27 Nov 2006 15:14:29 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164629026.797862.321550@l12g2000cwl.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7a9c25c20611222040q139ad3fera14a7afba6f60343@mail.gmail.com>
	<43c8685c0611222128r541a6fddtc4f2aa2d2e90f021@mail.gmail.com>
	<ek8v7f$lp8$1@sea.gmane.org>
	<mailman.746.1164579677.32031.python-list@python.org>
	<1164629026.797862.321550@l12g2000cwl.googlegroups.com>
Message-ID: <1164669269.439986.239340@45g2000cws.googlegroups.com>


Alan J. Salmoni wrote:
> I heartily agree. pdf format has never been much of a problem for me.
> Now that you have an ISSN, has it been submitted to Google Scholar or
> other academic indexes?
>
> http://scholar.google.com/intl/en/scholar/about.html for Google Scholar
> http://citeseer.ist.psu.edu/submitDocument.html for Citeseer
>
> These are two I can think of but there must be more. Any suggestions?
>
> I think that this is great work guys - I'll see if I can take some time
> to submit some of the code I developed a few years ago.
>
> All the best!
>
> Alan

We haven't hit Google Scholar yet, but we are publishing to other
online archives.

I'm in the middle of finding a semi-permanent location with a good URL
for keeping archives, and once that is done, we can get them indexed in
Google Search and Google Scholar.

Unfortunately, the domain name is currently a redirect which prevents
the indexing from working properly. We need a better home, but we are
working on it. We should have this by the next edition.

Thanks for the props.

Cheers,
-T
(Editor-In-Chief)



From meyer at acm.org  Fri Nov 24 10:57:02 2006
From: meyer at acm.org (Andre Meyer)
Date: Fri, 24 Nov 2006 16:57:02 +0100
Subject: synching with os.walk()
Message-ID: <7008329d0611240757i5ed323cn7dab41abad5f6d0a@mail.gmail.com>

Hi all

os.walk() is a nice generator for performing actions on all files in a
directory and subdirectories. However, how can one use os.walk() for walking
through two hierarchies at once? I want to synchronise two directories (just
backup for now), but cannot see how I can traverse a second one. I do this
now with os.listdir() recursively, which works fine, but I am afraid that
recursion can become inefficient for large hierarchies.

thanks for your help
Andr?
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From mike at hobbshouse.org  Mon Nov 13 13:23:55 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 12:23:55 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ej5asp$e85$1@news.albasani.net>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
Message-ID: <4558B83B.8080707@hobbshouse.org>

Georg Brandl wrote:
> Ron Adam wrote:
>   
>> Michael Hobbs wrote:
>>
>>     
>>> The same problem that is solved by not having to type parens around the 
>>> 'if' conditional, a la C and its derivatives. That is, it's unnecessary 
>>> typing to no good advantage, IMHO. I was coding in Ruby for several 
>>> months and got very comfortable with just typing the if conditional and 
>>> hitting return, without any extra syntax. When I came back to Python, I 
>>> found that I felt annoyed every time I typed the colon, since it 
>>> obviously isn't required. The FAQ says that the colon increases 
>>> readability, but I'm skeptical. The indentation seems to provide more 
>>> than enough of a visual clue as to where the if conditional ends.
>>>       
>> I'm not sure why '\'s are required to do multi-line before the colon.
>>     
>
> Special cases aren't special enough to break the rules.
>
> Georg
>   

Eh? So multi-line strings are special enough to create a new syntax, 
like, say, triple-quoted strings? Very long expressions aren't special 
enough to create a special backslash token to continue the expression on 
the next line? Multiple short expressions aren't special enough to 
create a special semi-colon token to combine them on a single line?

Programming language design is nothing more than deciding the best way 
to deal with special cases. That even includes Lisp.

- Mike



From p.lavarre at ieee.org  Thu Nov  9 20:24:15 2006
From: p.lavarre at ieee.org (p.lavarre at ieee.org)
Date: 9 Nov 2006 17:24:15 -0800
Subject: pack a three byte int
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
Message-ID: <1163121855.884088.12970@h48g2000cwc.googlegroups.com>

Perhaps Python can't concisely say three-byte int ...

But Python can say six-nybble hex:

>>> import binascii
>>> cdb = binascii.unhexlify('%02X%06X%02X%02X' % (0x08, 0x12345, 0x80, 0))
>>> binascii.hexlify(cdb)
'080123458000'
>>>

Thanks again for patiently helping me find this.  A shortcut is:

http://docs.python.org/lib/genindex.html
search: hex



From john106henry at hotmail.com  Fri Nov 17 01:59:41 2006
From: john106henry at hotmail.com (John Henry)
Date: 16 Nov 2006 22:59:41 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
Message-ID: <1163746781.666937.63970@h48g2000cwc.googlegroups.com>

I encountered a case where I am trying to match "HIDESST1" and
"HIDESCT1" against ["HIDEDST1", "HIDEDCT1", "HIDEDCT2", "HIDEDCT3"]

Well, they both hit "HIDEDST1" as the first match which is not exactly
the result I was looking for.  I don't understand why "HIDESCT1" would
not hit "HIDEDCT1" as a first choice.

Steven D'Aprano wrote:
> On Thu, 16 Nov 2006 20:19:50 -0800, John Henry wrote:
>
> > I did try them and I am impressed.  It helped me found a lot of useful
> > info.   I just want to get a feel as to what constitutes a "match".
>
> The source code has lots of comments, but they don't explain the basic
> algorithm (at least not in the difflib.py supplied with Python 2.3).
>
> There is no single diff algorithm, but I believe that the basic idea is to
> look for insertions and/or deletions of strings. If you want more
> detail, google "diff". Once you have a list of differences, the closest
> match is the search string with the fewest differences.
>
> As for getting a feel of what constitutes a match, I really can't make any
> better suggestion than just try lots of examples with the interactive
> Python shell.
> 
> 
> 
> -- 
> Steven D'Aprano



From carsten at uniqsys.com  Sun Nov 12 12:12:53 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Sun, 12 Nov 2006 12:12:53 -0500
Subject: Fredrik Lundh [was "Re: explicit self revisited"]
In-Reply-To: <1163315672.921664.306460@e3g2000cwe.googlegroups.com>
References: <ej5fuv$a4a$1@online.de>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2119.1163289905.11739.python-list@python.org>
	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>
Message-ID: <1163351573.3497.26.camel@localhost.localdomain>

On Sat, 2006-11-11 at 23:14 -0800, Doug wrote:
> Fredrik Lundh wrote:
> > Doug wrote:
> >>
> >> Fredrik Lundh wrote:
> >>> Fredrik Lundh wrote:
> >>> > cannot all you clueless trolls who cannot think of a single useful thing
> >>> > to contribute to Python start your own newsgroup?
> >>
> >>> and before anyone complains; please note that they're working through
> >>
> >>>      http://www.effbot.org/pyfaq/design-index.htm
> >>
> >> That site is a bunch of FUD -
> >> The explicit self is there simply because OOP was tacked onto python as
> >> an afterthought.
> >> Why not just be honest about it.  It's too late to change Python's
> >> syntax.  It just means a little extra typing.  If it really bothers
> >> someone, use "s" instead of "self" or else use Ruby.
> >
> > the official FAQ is a bunch of FUD?  are you sure you know what FUD means?
> >
> > </F>
> 
> You idiot. Putting the word "official" in front of something doesn't
> mean it can't be FUD.

Fredrik doesn't have to prove that the official FAQ isn't FUD. You,
Doug, have to prove that it is, because you accused it of being FUD. 

By your logic, I can prove that you are a piece of cheddar cheese. I
will simply assert that you are a piece of cheddar cheese. You might
respond by making a surprisingly lucid (for a piece of cheddar) argument
that you are a sentient being. To this I will respond "You idiot,
proving that you are a sentient being doesn't mean you can't be a piece
of cheddar." QED.

Since you are too lazy to post the wikipedia link, please allow me:
http://en.wikipedia.org/wiki/Fear%2C_uncertainty_and_doubt

According to that definition, FUD is "a sales or marketing strategy of
disseminating negative (and vague) information on a competitor's
product."

Even if the FAQ could, by a stretch of the imagination, be considered a
sales or marketing strategy, you'd be hard-pressed to find evidence of
it disseminating negative information on a competitor's product. Hence,
it's not FUD.

-Carsten




From sjmachin at lexicon.net  Tue Nov 28 06:53:06 2006
From: sjmachin at lexicon.net (John Machin)
Date: 28 Nov 2006 03:53:06 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <ekh10m$9sh$00$2@news.t-online.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
	<ekh10m$9sh$00$2@news.t-online.com>
Message-ID: <1164714786.086910.288450@45g2000cws.googlegroups.com>


Peter Otten wrote:
> Peter Otten wrote:
>
> > Leo Kislov wrote:
> >
> >>
> >> Peter Otten wrote:
> >>> Peter Otten wrote:
> >>>
> >>> > HYRY wrote:
> >>> >
> >>> >> I want to join two mono wave file to a stereo wave file by only using
> >>> >> the default python module.
> >>> >> Here is my program, but it is much slower than the C version, so how
> >>> >> can I increase the speed?
> >>> >> I think the problem is at line #1, #2, #3.
> >>> >
> >>> >> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
> >>> >
> >>> > ITEMSIZE = 2
> >>> > size = ITEMSIZE*(len(larray) + len(rarray))
> >>> > oarray = array.array("h")
> >>> > oarray.fromstring("\0" * size)
> >>> >
> >>> > may be a bit faster.
> >>>
> >>> Confirmed:
> >>>
> >>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
> >>> array("h"); a.fromstring("\0"*(2*N))'
> >>> 100 loops, best of 3: 9.68 msec per loop
> >>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
> >>> array("h",
> >>> [0]*N);'
> >>> 10 loops, best of 3: 199 msec per loop
> >>
> >> Funny thing is that using huge temporary string is faster that
> >> multiplying small array:
> >>
> >> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
> >> =array('h'); a.fromstring('\0'*(2*N))"
> >> 100 loops, best of 3: 9.57 msec per loop
> >>
> >> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
> >> = array('h','\0\0'); a*N"
> >> 10 loops, best of 3: 28.4 msec per loop
> >>
> >> Perhaps if array multiplication was as smart as string multiplication
> >> then array multiplication version would be the fastest.
>
> Oops, I have to work on my reading skills. You're right, of course...
>
> > That will not suffice:
> >
> > $ python2.5 -m timeit -s'from array import array; from itertools import
> > repeat; N = 10**6; init = [0]*N' 'array("h", init)'
> > 10 loops, best of 3: 130 msec per loop
> >
> > $ python2.5 -m timeit -s'from array import array; from itertools import
> > repeat; N = 10**6; init = "\n"*(2*N)' 'array("h").fromstring(init)'
> > 100 loops, best of 3: 5 msec per loop
> >
> > A big chunk of the time is probably consumed by "casting" the list items.
> > Perhaps an array.fill(value, repeat) method would be useful.
>
> ... and that could be spelled array.__mul__ as you suggest.
>

I'm extremely agnostic about the spelling :-) IOW I'd be very glad of
any way [pure Python; e.g. maintaining my own version of the array
module doesn't qualify] to simply and rapidly create an array.array
instance with typecode t and number of elements n with each element
initialised to value v (default to be the zero appropriate to the
typecode).

Cheers,
John



From martinskou at gmail.com  Wed Nov 22 08:36:14 2006
From: martinskou at gmail.com (martinskou at gmail.com)
Date: 22 Nov 2006 05:36:14 -0800
Subject: Method argument names
Message-ID: <1164202574.147454.80620@j44g2000cwa.googlegroups.com>

Hi

Having a method:

def method(self,x,y):

is it possible to discover, from outside the method, that the methods
arguments are ['self', 'x', 'y']?

Thanks.

/Martin



From steve at holdenweb.com  Tue Nov  7 17:19:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Nov 2006 17:19:16 -0500
Subject: Pyro stability
In-Reply-To: <4550FC50.5040204@mvista.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>	<454dd84b$0$328$e4fe514c@news.xs4all.nl>	<1162783631.291535.221530@f16g2000cwb.googlegroups.com>	<454fdbc5$0$335$e4fe514c@news.xs4all.nl>	<mailman.1827.1162864080.11739.python-list@python.org>	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>	<1162895554.549926.49280@k70g2000cwa.googlegroups.com>
	<4550FC50.5040204@mvista.com>
Message-ID: <eir0ms$gle$1@sea.gmane.org>

Carl J. Van Arsdall wrote:
> Paul Boddie wrote:
> 
>>Beliavsky wrote:
>>  
>>
>>>Carl J. Van Arsdall wrote:
>>>    
>>
>>[Enthusiasm for Pyro, not for those with sensitivity to rude words]
>>
>>  
>>
>>>You should watch your language in a forum with thousands of readers.
>>>    
> 
> I think you should find better things to complain about and not worry 
> about language usage so much.
> 
It didn't seem like an unreasonable request to me, though I concede that 
you aren't (yet :-) known throughout Usenet for your profanity.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From insyte at gmail.com  Thu Nov 16 05:52:52 2006
From: insyte at gmail.com (insyte at gmail.com)
Date: 16 Nov 2006 02:52:52 -0800
Subject: More puzzling behavior while subclassing datetime
In-Reply-To: <ejh7pa$7ih$00$1@news.t-online.com>
References: <1163659104.321150.322650@e3g2000cwe.googlegroups.com>
	<ejh7pa$7ih$00$1@news.t-online.com>
Message-ID: <1163674371.964033.116540@h54g2000cwb.googlegroups.com>

> Yes. Consider:
>
> >>> def today(time=None, *args):
> ...     print "time = ", time, "args = ", args
> ...
> >>> today(2006, 11, 16)
> time =  2006 args =  (11, 16)
>
> To fix the issue you'll probably have to remove the time=None parameter from
> GeneralizedTime.__new__() and instead extract it from args or kwargs.

D'oh.  That *should* have been obvious.

I am now no longer allowed to program after midnight.

Thanks!

-Ben



From srikrishnamohan at gmail.com  Tue Nov 14 06:16:55 2006
From: srikrishnamohan at gmail.com (km)
Date: Tue, 14 Nov 2006 16:46:55 +0530
Subject: __init__.py
Message-ID: <f4cc03640611140316u4f8b5bf9reca25f5853ce8008@mail.gmail.com>

Hi all,

what is the use of __init__.py file in a module dir ?

Is it used to initialize variables  that could be shared across sub modules
if set in __init__.py at root dir  of module ?

regards,
KM
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From fumanchu at amor.org  Thu Nov 30 12:28:23 2006
From: fumanchu at amor.org (fumanchu)
Date: 30 Nov 2006 09:28:23 -0800
Subject: Threading
In-Reply-To: <mailman.884.1164901063.32031.python-list@python.org>
References: <mailman.884.1164901063.32031.python-list@python.org>
Message-ID: <1164907702.960054.79440@16g2000cwy.googlegroups.com>

Gheorghe Postelnicu wrote:
> I found a recipe on ASPN on how to intercept keyboard interrupts and
> that is useful if I need to brutally kill the launching process.
>
> However, my question regards killing the actual children threads -
> they are spending lots of time in system calls, so I cannot insert
> some while loop in a derived Thread class.

kill -9?


Bob



From seandavi at gmail.com  Wed Nov 29 10:43:44 2006
From: seandavi at gmail.com (SeanDavis12)
Date: 29 Nov 2006 07:43:44 -0800
Subject: How to detect what type a variable is?
In-Reply-To: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
Message-ID: <1164815024.188857.17920@h54g2000cwb.googlegroups.com>


Leandro Ardissone wrote:
> Hi,
>
> I want to know what type is a variable.
> For example, I get the contents of an xml but some content is a list or
> a string, and I need to know what type it is.

type(variable)

Sean



From tleeuwenburg at gmail.com  Thu Nov 23 18:09:11 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 23 Nov 2006 15:09:11 -0800
Subject: The Python Papers Edition One
In-Reply-To: <7xodqyn5kd.fsf@ruckus.brouhaha.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
Message-ID: <1164323350.988946.209350@l12g2000cwl.googlegroups.com>

Yes, it's true that you can't resell copies of The Python Papers for
personal profits, but you may derive from it, reproduce and propagate
it. You're quite right to point it out.

Licenses are too complicated. I don't believe a license exists which
meets the demands of all clients, however should I be wrong on this
count, nothing prevents us from using it in future editions.

Also, copyright is always held by the original authors, so the works
may be relicensed if necessary. We are still working on the copyright
agreement with future authors, however at this stage all we are asking
from them is the same license which covers the journal.

I'm not a true expert in this area, although I'm of course vaguely
aware of the GPL and CC. When choosing a license, the editorial board
was interested in finding something that could be easily assimilated by
authors, and that reflected a general encouragement of the
dissemination of information.

The point about not being able to be re-used by e.g., the Python
documentation website, is a bit of a thorn in my side as I had hoped
that we had chosen something which would allow the information to flow
through the community.

Perhaps people could comment on the following proposition -- if an
organisation is Not for Profit, its dealings are therefore
Noncommercial?

Cheers,
-T
(Editor-In-Chief)



From lukasz.langa at gmail.com  Fri Nov 17 10:48:18 2006
From: lukasz.langa at gmail.com (=?UTF-8?B?xYF1a2FzeiBMYW5nYQ==?=)
Date: Fri, 17 Nov 2006 16:48:18 +0100
Subject: Question about unreasonable slowness
In-Reply-To: <1163773005.201111.175020@f16g2000cwb.googlegroups.com>
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>	<455ce05a$0$5794$4d3efbfe@news.sover.net>
	<1163773005.201111.175020@f16g2000cwb.googlegroups.com>
Message-ID: <455DD9C2.4050701@gmail.com>

allenjo5 at mail.northgrum.com:
> Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
> shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
> python 2.4.3.   So, that's better, but still unreasonably slow.  And to
> answer another's question, I'm using the ksh builtin 'time' command to
> time the overall script.
>
> BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
> This naively translated pure shell version of my python test script
> completes in .1 secs:
>
> i=1
> while ((i<20))
> do ((i+=1))
>    print next
>    print "$shellIn" | /bin/sh -c ':' |
>            while read line
>            do print $line
>            done
> done
>
> Has anyone tried this on a true unix box (AIX, HPUX, Solaris, Linux)?
> It seems to be functioning differently (and faster) on Windows and OS X
>  (though I guess at its heard, OS X is essentially unix).
>
> John.
>   

Linux 2.6.17-1.2142_FC4smp #1 SMP Tue Jul 11 22:57:02 EDT 2006 i686 i686 
i386 GNU/Linux

# <code>

import os
import timeit

def test():
   for i in xrange(20):
       (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")
       print 'next'
       for line in shellOut:
           print line

print timeit.Timer("test()", "from __main__ import test\nimport 
os").timeit(1)

# </code>


This returns in 0.4 seconds. If I time it to do 50 tests, it returns 
after 20.2 - 20.5 seconds. Even if I substitute the for i in xrange() 
construct to your sh-like while statement. And all that through a 
network, with print statements intact. Guess your true Unix box has some 
features unavailable on Fedora Core or MacOS X ;-)

Regards,
?ukasz Langa




From sjmachin at lexicon.net  Wed Nov 22 14:49:22 2006
From: sjmachin at lexicon.net (John Machin)
Date: 22 Nov 2006 11:49:22 -0800
Subject: utf - string translation
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
Message-ID: <1164224962.711265.198090@h48g2000cwc.googlegroups.com>

hg wrote:
> Duncan Booth wrote:
> > hg <hg at nospam.com> wrote:
> >
> >>> or in other words, put this at the top of your file (where "utf-8" is
> >>> whatever your editor/system is using):
> >>>
> >>>    # -*- coding: utf-8 -*-
> >>>
> >>> and use
> >>>
> >>>    u'<text>'
> >>>
> >>> for all non-ASCII literals.
> >>>
> >>> </F>
> >>>
> >> Hi,
> >>
> >> The problem is that:
> >>
> >> # -*- coding: utf-8 -*-
> >> import string
> >> print len('a')
> >> print len('?')
> >>
> >> returns 1 then 2
> >
> > And if you do what was suggested and write:
> >
> > # -*- coding: utf-8 -*-
> > import string
> > print len(u'a')
> > print len(u'?')
> >
> > then you get:
> >
> > 1
> > 1

Some general comments:

1. There has been at least one thread on the subject of ripping accents
off Latin1 characters in the last 3 or 4 months. Try Google.

2. About your earlier problem, when len(thing1) != len(thing2):
In that and similar situations, it can be *very* useful to use this
technique:
    print repr(thing1), type(thing1)
    print repr(thing2), type(thing2)
Go back now and try it out!

> OK,
>
> How would you handle the string.maketrans then ?
>

I suggest that you first read the documentation on the str and unicode
"translate" methods.
You can obtain this quickly at the interactive prompt by doing
    help(''.translate)
and
    help(u''.translate)
respectively.

Next steps:

Is your *real* data (not the examples you were hard-coding earlier)
encoded (latin1, utf8) in str objects or is it in unicode objects?
After reading previous posts my head is spinning & I'm not going to
guess; you determine it  yourself.

[pseudocode -- blend of Pythonic & Knuthian styles]
if latin1: (A) you can use string.maketrans and str.translate
immediately.

elif unicode: (B) either (1) encode to latin1; goto (A) or (2) use
unicode.translate with do-it-yourself mapping

elif utf8: decode to unicode; goto (B)

else: ???

HTH,
John



From bronger at physik.rwth-aachen.de  Tue Nov  7 03:13:38 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Tue, 07 Nov 2006 09:13:38 +0100
Subject: PIL: match for ImageMagick's display -ping
Message-ID: <87d57zoerx.fsf@wilson.homeunix.com>

Hall?chen!

I have to extract the dimensions of many bitmap files.  An old Bash
script did it with ImageMagick's "display -ping ...".  "-ping" means
that it extracts the image dimensions efficiently.  I suspect it
simply doesn't read the image itself.

Now the Bash script has been transformed into Python+PIL.  Is there
a way to get the dimensions equally efficient here, or does the PIL
even do this optimisation implicitly since I never access the image
bitmap itself? ceter

Thank you!

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus
                                                    ICQ 264-296-646
                   (See http://ime.webhop.org for Jabber, MSN, etc.)


From fredrik at pythonware.com  Thu Nov 16 05:15:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 11:15:25 +0100
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejhcdm$3pv$1@wake.carmen.se>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>	<mailman.2063.1163190929.11739.python-list@python.org>	<4558b437$0$32430$c3e8da3@news.astraweb.com>
	<ejhcdm$3pv$1@wake.carmen.se>
Message-ID: <ejhdnt$hq6$1@sea.gmane.org>

Magnus Lycka wrote:

> Which is the better writing style for text intended for human readers?
> 
> I have some things to say:
>      Seagulls belong in the sky.
>      Colon fits in the text.
> 
> I have some things to say
> {
>      Seagulls belong in the text.
>      Colon fits in the belly.
> }

have anyone counted the number of colons used in this way by the OP,
in his first few posts ?  (if there isn't a name for the law that
states that the number for a "let's remove the colons" proposal is 
always greater than zero, someone should come up with one...)

</F>



From flamesrock at gmail.com  Tue Nov 21 18:10:25 2006
From: flamesrock at gmail.com (flamesrock)
Date: 21 Nov 2006 15:10:25 -0800
Subject: Is time.time() < time.time() always true?
Message-ID: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>

So, I was blazin' some mad chronix, as they say, and got on to thinking
about Python.

The question was, is the statement:

time.time() < time.time()

always true? Seems it should be false, since the statement itself
occurs at one time instant.. but of course we know that python doesn't
execute code that way.. So my question is, why doesn't Python work this
way?


(PS, I wasn't smoking anything, its a figure of speech :) )



From steve at rueb.com  Wed Nov 29 16:54:49 2006
From: steve at rueb.com (Steve Bergman)
Date: 29 Nov 2006 13:54:49 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
Message-ID: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>

Just wanted to report a delightful little surprise while experimenting
with psyco.
The program below performs astonoshingly well with psyco.

It finds all the prime numbers < 10,000,000

Processor is AMD64 4000+ running 32 bit.

Non psyco'd python version takes 94 seconds.

psyco'd version takes 9.6 seconds.

But here is the kicker.  The very same algorithm written up in C and
compiled with gcc -O3, takes 4.5 seconds.  Python is runng half as fast
as optimized C in this test!

Made my day, and I wanted to share my discovery.

BTW, can this code be made any more efficient?


============

#!/usr/bin/python -OO
import math
import sys
import psyco

psyco.full()

def primes():
    primes=[3]
    for x in xrange(5,10000000,2):
        maxfact = int(math.sqrt(x))
        flag=True
        for y in primes:
            if y > maxfact:
                break
            if x%y == 0:
                flag=False
                break
        if flag == True:
            primes.append(x)
primes()



From walterbyrd at iname.com  Wed Nov 15 10:37:39 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 07:37:39 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163559359.010787.185840@m73g2000cwd.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
Message-ID: <1163605059.270769.293290@m73g2000cwd.googlegroups.com>

Luis M. Gonz?lez wrote:
> the new crop of web frameworks (Django, Turbo Gears, etc...).
>
> > - Newer versions of mod_python require Apache 2.0, which few hosters
> > have
>
> You can also get alder versions of mod_python. What's the problem?

The problem is that the system requirements for django and turbogears
are sky-high. I think Django requires Apache 2.0 (and maybe mod_python
3.x), and CherryPy (part of turbogears) requires Python 2.4. If you are
developing for a hosted environment, this can be a big problem. Few
enough hosters provide python to begin with, then add to that such
requirements as apache 2.0 - and you left with almost nothing.



From sjdevnull at yahoo.com  Thu Nov 16 17:21:29 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 16 Nov 2006 14:21:29 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163681949.338244.323390@k70g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
Message-ID: <1163715688.959899.65990@h48g2000cwc.googlegroups.com>

Luis M. Gonz?lez wrote:
> Cameron Laird ha escrito:
> > Perhaps it's timely to clarify the "newer" above:  Guido
> > made Python public in '89-90, and Rasmus showed PHP to
> > others in '94-95.
>
> OK. But since when has python been considered a viable alternative for
> web development?
> As a generalp purpose language, it's older.
> But as a web development language, it's olnly when people started to
> look for the "rails killer" and many python alternatives started to
> come up (although Django has been in development for a long time before
> all this hype).

Huh?  I've been doing paid python web work since 2000.  I'm fairly sure
that Yahoo! groups predates that by a while, and I know that
mod_python/httpdapy goes back at least to 1998 (and Python CGI predates
that significantly).



From tactics40 at gmail.com  Sun Nov 26 15:28:53 2006
From: tactics40 at gmail.com (tac-tics)
Date: 26 Nov 2006 12:28:53 -0800
Subject: pdb question
Message-ID: <1164572933.131055.43940@14g2000cws.googlegroups.com>

In the Python debugger (pdb), how do you designate breakpoints at the
start of methods?
I've tried:
break methodName
break class.methodName
break object.methodName

but none of these seem to work. What is the trick?



From Leo.Kislov at gmail.com  Mon Nov 13 15:04:21 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 13 Nov 2006 12:04:21 -0800
Subject: Character Encodings and display of strings
References: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>
	<mailman.62.1163428860.32031.python-list@python.org>
	<1163429791.517778.46220@f16g2000cwb.googlegroups.com>
	<4rrjibFspqicU3@mid.uni-berlin.de>
	<1163440310.722375.156930@m7g2000cwm.googlegroups.com>
Message-ID: <1163448261.866172.321670@e3g2000cwe.googlegroups.com>


JKPeck wrote:
> It seemed to me that this sentence
>
> For many types, this function makes an attempt to return a string that
> would yield an object with the same value when passed to eval().
>
> might mean that the encoding setting of the source file might influence
> how repr represented the contents of the string.  Nothing to do with
> Unicode.  If a source file could have a declared encoding of, say,
> cp932 via the # coding comment, I thought there was a chance that eval
> would respond to that, too.

Not a chance :) Encoding is a property of an input/output object
(console, web page, plain text file, MS Word file, etc...). All
input/output object have specific rules determining their encoding,
there is absolutely no connection between encoding of the source file
and any other input/output object.

repr escapes bytes 128..255 because it doesn't know where you're going
to output its result so repr uses the safest encoding: ascii.

  -- Leo



From fuzzyman at gmail.com  Sat Nov  4 10:21:27 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 4 Nov 2006 07:21:27 -0800
Subject: PySchool - Online Python Web Framework Workshop.
In-Reply-To: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
References: <1162593399.583357.199570@e3g2000cwe.googlegroups.com>
Message-ID: <1162653687.090926.282290@e3g2000cwe.googlegroups.com>


RobJ wrote:
> Hi! My Name is Rob Johnson and I am a graduate student at The Richard
> Stockton College of NJ. To make a long story short, I'm working on my
> Masters project in the MAIT program (Masters of Arts in Instructional
> Technology). I have written a proposal to put together a free on-line
> Python web framework workshop. The workshop will be geared to help
> people new to Python web frameworks. I am asking for the community's
> assistance to help me get this project off the ground. As part of my
> project, I am conducting a survey for people who are interested in
> learning more about python web frameworks.  The survey is located at
> http://killersurvey.com/answer_survey.php?id=479. I have also started a
> blog about this experience in order to let people know what I'm doing
> (http://pyschool.blogspot.com/). If you have a few minutes, please take
> a couple of minutes to take the quick survey. The survey is anonymous
> and the information will be used for statistics for my project. Also,
> any constructive feedback or suggestions that you can give me would be
> gladly appreciated.
>

This is a good idea. Good luck.

I hope you make the results of the survey public.

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml
> Thanks
> 
> Rob J



From anthra.norell at vtxmail.ch  Fri Nov  3 07:51:21 2006
From: anthra.norell at vtxmail.ch (Frederic Rentsch)
Date: Fri, 03 Nov 2006 13:51:21 +0100
Subject: ANN: SE 2.3. Available now
Message-ID: <454B3B49.6070702@vtxmail.ch>

A few Cheese Shop upload problems have been solved with the help of this 
creative group. Thank you all!

Version 2.2 beta should be phased out. It has a functional defect, 
missing matches with a very low statistical probability. Version 2.3 has 
this fixed.

   Download URL: http://cheeseshop.python.org/pypi/SE/2.3

A list of possible handling improvements is being made to be 
incorporated in the next version, One major flaw of the interface design 
came to light the other day when a user reported a non-functioning 
Editor Object made with a file name. If the constructor cannot find the 
file it records the fact in the object's log without making the user 
aware that his Editor Object is incomplete or altogether devoid of 
substitutions. His obvious conclusion is that the damn thing isn't 
working right.
   Compile errors should certainly be reported at compile time. The next 
version will send all messages being logged also to stderr by default. 
The thing to do with the current version, if it appears to malfunction, 
is to inspect the log and the compiled substitutions.

 >>> Editor = SE.SE ('operators.se')
 >>> Editor.show_log ()

Fri Nov 03 12:49:17 2006 - Compiler - Ignoring single word 
'operators.se'. Not an existing file 'operators.se'.

 >>> Editor = SE.SE ('se/operators.se')   # path was missing
 >>> Editor.show_log ()

(Log is empty. All is well.)

 >>> Editor.show (show_translators = 1)

(snip)

Single-Byte Targets
    1: |<|->|LT|
    2: |>|->|GT|

Multi-Byte Targets
    3: |&&|->|AND|
    4: ||||->|OR|

etc...

The display makes definition errors conspicuous. Missing definitions 
indicate malformed or redefined (overwritten) ones.


Frederic




From fredrik at pythonware.com  Sun Nov 12 13:14:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Nov 2006 19:14:06 +0100
Subject: MemoryError
In-Reply-To: <5a00f6240611121010i63c16d95tf9fc743edcb58ebf@mail.gmail.com>
References: <5a00f6240611121010i63c16d95tf9fc743edcb58ebf@mail.gmail.com>
Message-ID: <ej7o9i$457$1@sea.gmane.org>

Bugra Cakir wrote:

> Within a Python program how can we avoid getting "MemoryError" problem ?

since you still haven't told us what your program is doing, and where in 
the program you're getting the error, it's a bit hard to tell.

</F>



From steve at REMOVE.THIS.cybersource.com.au  Tue Nov  7 09:39:05 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 08 Nov 2006 01:39:05 +1100
Subject: __init__ function problem
References: <1162905967.354604.38230@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.07.14.39.04.730211@REMOVE.THIS.cybersource.com.au>

On Tue, 07 Nov 2006 05:26:07 -0800, kelin,zzf818 at gmail.com wrote:

> Hi,
> 
> Today I read the following sentences, but I can not understand what
> does the __init__ method of a class do?

Play around with this class and see if it helps:


class MagicStr(str):
	"""Subclass of str with leading and trailing asterisks."""
	def __new__(cls, value=''):
		print "Calling subclass constructor __new__ ..."
		# Construct a MagicStr object.
		obj = super(MagicStr, cls).__new__(cls, '***' + value + '***')
		print "  - inspecting constructor argument:"
		print "    value, id, type:", value, id(value), type(value)
		print "  - inspecting constructor result:"
		print "    value, id, type:", obj, id(obj), type(obj)
                # Create the instance, and call its __init__ method.
		return obj 
	def __init__(self, value):
		print "Calling subclass __init__ ..."
		print "  - inspecting __init__ argument:"
		print "    value, id, type:", value, id(value), type(value)
		print "Done."


Notice that when __new__ is called, the instance doesn't exist yet, only
the class, so the first argument for __new__ is the class, not the
instance.



> __init__ is called immediately after an instance of the class is
> created. It would be tempting but incorrect to call this the
> constructor of the class. It's tempting, because it looks like a
> constructor (by convention, __init__ is the first method defined for
> the class), acts like one (it's the first piece of code executed in a
> newly created instance of the class), 

That's not quite true. For new-style classes __new__ is called before
__init__, as you can see from the MagicStr class above.


> and even sounds like one ("init"
> certainly suggests a constructor-ish nature). Incorrect, because the
> object has already been constructed by the time __init__ is called, and
> you already have a valid reference to the new instance of the class.
> But __init__ is the closest thing you're going to get to a constructor
> in Python, and it fills much the same role.

This is true for old-style classes.
 
> It says the __init__ is called immediately after an instance of the
> class is created. What dose "immediately" mean?

Once the __new__ method creates the instance and returns, before anything
else happens, the instance's __init__ method is called.



-- 
Steven.



From levub137 at wi.rr.com  Sun Nov 19 12:43:29 2006
From: levub137 at wi.rr.com (Raymond L. Buvel)
Date: Sun, 19 Nov 2006 17:43:29 GMT
Subject: [ANN] clnum-1.4 Class Library For Numbers Python Binding
Message-ID: <5J08h.18973$fh.2998@tornado.rdc-kc.rr.com>

The clnum package adds rational numbers and arbitrary precision floating
point numbers in real and complex form to Python. Also provides
arbitrary precision floating point replacements for the functions in the
math and cmath standard library modules.

Home page: http://calcrpnpy.sourceforge.net/clnum.html

Changes in 1.4

* Fixed anomaly where an exact zero was converted using default
precision in multiply and divide routines.

* Added function to approximate a number as a rational with the size of
the numerator and denominator constrained.


From duncan.booth at invalid.invalid  Sun Nov 19 05:35:33 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Nov 2006 10:35:33 GMT
Subject: Why isn't SPLIT splitting my strings
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
Message-ID: <Xns98806BBFABE66duncanbooth@127.0.0.1>

"ronrsr" <ronrsr at gmail.com> wrote:

> I'm trying to break up the result tuple into keyword phrases.  The
> keyword phrases are separated by a ;  -- the split function is not
> working the way I believe it should be. Can anyone see what I"m doing
> wrong?

I think your example boils down to:

>>> help(str.split)
Help on method_descriptor:

split(...)
    S.split([sep [,maxsplit]]) -> list of strings
    
    Return a list of the words in the string S, using sep as the
    delimiter string.  If maxsplit is given, at most maxsplit
    splits are done. If sep is not specified or is None, any
    whitespace string is a separator.

>>> s = 'Antibiotics, Animals'
>>> s.split('; ()[]"')
['Antibiotics, Animals']

This is what I expect. The separator string '; ()[]"' does not occur 
anywhere in the input string, so there is nowhere to split it.

If you want to split on multiple single characters, then either use 
re.split and filter out the separators, or use string.translate or 
str.replace to replace all of the separators with the same character and 
split on that. e.g.

>>> def mysplit(s):
	s = s.replace(' ', ';')
	s = s.replace('(', ';')
	s = s.replace(')', ';')
	s = s.replace('[', ';')
	s = s.replace(']', ';')
	s = s.replace('"', ';')
	return s.split(';')

>>> mysplit(s)
['Antibiotics,', 'Animals']

which still looks a bit weird as output, but you never actually said what 
output you wanted.


From bj_666 at gmx.net  Fri Nov 17 07:11:58 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 17 Nov 2006 13:11:58 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
References: <mailman.294.1163721712.32031.python-list@python.org>
	<pan.2006.11.17.09.08.26.255202@gmx.net>
	<4cefe$455d8f47$59ad1aca$3993@news.flashnewsgroups.com>
Message-ID: <pan.2006.11.17.12.11.56.982511@gmx.net>

In <4cefe$455d8f47$59ad1aca$3993 at news.flashnewsgroups.com>, gabor wrote:

> Marc 'BlackJack' Rintsch wrote:
>> In <mailman.294.1163721712.32031.python-list at python.org>, Jean-Paul
>> Calderone wrote:
>> 
>>>> How would you propose listdir should behave?
>>> Umm, just a wild guess, but how about raising an exception which includes
>>> the name of the file which could not be decoded?
>> 
>> Suppose you have a directory with just some files having a name that can't
>> be decoded with the file system encoding.  So `listdir()` fails at this
>> point and raises an exception.  How would you get the names then? Even the
>> ones that *can* be decoded?  This doesn't look very nice:
>> 
>> path = u'some path'
>> try:
>>     files = os.listdir(path)
>> except UnicodeError, e:
>>     files = os.listdir(path.encode(sys.getfilesystemencoding()))
>>     # Decode and filter the list "manually" here.
> 
> i agree that it does not look very nice.
> 
> but does this look nicer? :)
> 
> path = u'some path'
> files = os.listdir(path)
> 
> def check_and_fix_wrong_filename(file):
> 	if isinstance(file,unicode):
> 		return file
> 	else:
> 		#somehow convert it to unicode, and return it
> 
> files = [check_and_fix_wrong_filename(f) for f in files]

I think this is very "special" code as you can't use the fixed names to
open the files anymore unless you guess the encoding correctly.  I think
it's a bit fragile.  Wouldn't it be a better solution to convert the
`path` to the file system encoding for getting the file names.  This way
you can use all the names to process the files.

> in other words, your opinion is that the proposed solution is not 
> optimal, or that the current behavior is fine?

I think the current behavior is okay but should be documented.

Maybe I just didn't had enough use cases yet that needed the names as
unicode objects and from my linux file systems experience file names are
just byte strings with two limitations: no slashes and no zero bytes.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From http  Sat Nov 18 19:39:47 2006
From: http (Paul Rubin)
Date: 18 Nov 2006 16:39:47 -0800
Subject: Finding skilled pythonistas for micro-jobs?
References: <1163895209.986877.13820@f16g2000cwb.googlegroups.com>
Message-ID: <7x64dc8e24.fsf@ruckus.brouhaha.com>

"darran" <darran at edmstudio.com> writes:
> Any suggestions then for locating skilled Python/C++ programmers for
> these small (micro) jobs?  

I've taken a number of these and always regretted it.  They've been
far more hassle than they're worth.  But maybe that's just me.


From pavlovevidence at gmail.com  Tue Nov 21 09:04:40 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 21 Nov 2006 06:04:40 -0800
Subject: Load objects using __import__
In-Reply-To: <1164114886.356071.14990@k70g2000cwa.googlegroups.com>
References: <1164114886.356071.14990@k70g2000cwa.googlegroups.com>
Message-ID: <1164117880.843179.24210@h54g2000cwb.googlegroups.com>


MindClass wrote:
> But when I load the object I get
>     SyntaxError: invalid syntax
>
>     c1 = <module 'project.I18n.models' from
> '/home/lala/django/project/I18n/models.pyc'>.Country(name="Afghanistan")

It looks like you're running generated code somewhere, but passing the
module itself rather than the name of the module to the code generator
by mistake.  Perhaps you're execing some code that you pass the module
name to?  Something like this?

exec 'c1 = %s.Country(name="Afgahanstan")' % module_name

You seem to be erroneously using the module itself, not the module
name.

That's about all I can help without more information.


P.S. if you are doing that, consider using getattr instead of exec.

c1 = getattr(module,Country)(name="Afgansitan")


Carl Banks



From steve at holdenweb.com  Thu Nov  2 11:33:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Nov 2006 16:33:51 +0000
Subject: creating new objects with references to them
In-Reply-To: <1162483976.152660.121200@f16g2000cwb.googlegroups.com>
References: <1162480549.786082.290980@b28g2000cwb.googlegroups.com>	<1162482760.424782.244760@h48g2000cwc.googlegroups.com>
	<1162483976.152660.121200@f16g2000cwb.googlegroups.com>
Message-ID: <eid6ja$uep$1@sea.gmane.org>

JohnJSal wrote:
> Ant wrote:
> 
> 
>>It all depends on what UI you are using (Web frontend? GUI such as
>>Tkinter?) and what your use case is.
> 
> 
> Making it myself with wxPython.
> 
> 
>>What is it exactly that you want to do? Create a bunch of Researcher
>>objects and then save them in a single hit? Create a list of
>>Researchers and then choose which to save to the db? Populate a list of
>>researchers from the db, and have the option of editing or adding new
>>ones? Should the new Researcher objects be committed to the db as soon
>>as they are saved?
> 
> 
> There are two options: save current record and save all records, both
> of which put the info in the DB immediately.
> 
> 
> 
>>Anyway, a simple list of Researchers should suffice for any of these
>>purposes, and assuming you want to commit them all in one hit, you have
>>a list of objects ready to iterate over.
> 
> 
> Ok, so in making a list does this mean that I won't have a name for
> each instance? I just have to iterate over the list when I need them?
> I'm not sure how I would do this if the user chooses just to save a
> single record and not all of them.
> 
Suppose you have a function dBWrite(r), where r is (some representation 
of) a record you want to write into the database.

Further suppose you currently have 10 records, stored in a list rec, 
with indices 0 through 9.

To write record 7 only you could use

     dbWrite(rec[7])
     conn.commit() # assuming dbWrite uses connection conn
     del rec[7]
     # you'd also want to kill the window containing this record

To write them all you might try

     for r in rec:
         dbWrite(r)
     conn.commit()
     rec = []
     # Close all record windows

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From tiedon_jano at hotmail.com  Tue Nov 28 09:08:00 2006
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 28 Nov 2006 14:08:00 GMT
Subject: Libgmail
In-Reply-To: <1164706353.955200.128330@l39g2000cwd.googlegroups.com>
References: <1164703460.303062.58620@80g2000cwy.googlegroups.com>
	<kaTah.74$TE1.10@read3.inet.fi>
	<1164706353.955200.128330@l39g2000cwd.googlegroups.com>
Message-ID: <4pXah.187$TE1.91@read3.inet.fi>

linuxfreak wrote:
> Funny enough I find the same "Google" in my browser too. and if my
> memory serves me correct I did the same search which you allude to. It
> is only after series of exhaustive searches rummaging through websites
> with incomplete (or non existent ) docs  that i posed the question
> here.... :) thanks for the suggestion anyway....

The page I suggested to you
	 http://libgmail.sourceforge.net/
has a Downloads link and there you can find a docs file which contains 
demo code (9 programs) and the libgmail API documentation.

Unfortunately I don't have a Gmail account, so I'm not able to try the 
programs out but I think they do some of the things you are targeting.

HTH,
Jussi


From antroy at gmail.com  Fri Nov 24 11:31:16 2006
From: antroy at gmail.com (Ant)
Date: 24 Nov 2006 08:31:16 -0800
Subject: Invoking Python from Cygwin problem.
Message-ID: <1164385876.755749.139020@l39g2000cwd.googlegroups.com>

Hi all,

Using cygwin and Python 2.5, I have the following scripts, one bash
script and the other a python script:
-------------------------------------------------------------------------------
#!/bin/bash

TEST_VAR=`./test.py`
TEST_VAR2=Test2

echo "Test var: $TEST_VAR OK"
echo "Test var2: $TEST_VAR2 OK"

----------------------------------------------------------------------------------
#!/usr/bin/python
print "Testing",

Running the bash script, I get the following output:

OKt var: Testing
Test var2: Test2 OK

Does anyone have any idea why the script would mess up the first echo?
Are there some kind of control characters being appended to the python
output in Windows? Looks like a CR character, but why?

Cheers,



From fdu.xiaojf at gmail.com  Fri Nov 17 09:04:45 2006
From: fdu.xiaojf at gmail.com (fdu.xiaojf at gmail.com)
Date: Fri, 17 Nov 2006 22:04:45 +0800
Subject: Which one is better for me , SIP or SWIG ?
Message-ID: <455DC17D.2090600@gmail.com>

Hi all,

I am going to generate a python wrapper of a C library, and I am 
wondering which one is a better tool for me, SIP or SWIG ?

SWIG supports many scripting languages such as python, ruby, and perl, 
while SIP is specific to python, so I think maybe SIP is more suitable 
to generate better wrappers(sorry for my ignorance if I am wrong at this 
point) with python.

But it seems that SIP is mainly used for pyQT and hasn't gained general 
acceptance with python community.

Could someone give me a better comparison of SIP and SWIG ?

My concerns:
 
  1. I just want an python wrapper for C/C++ code. The support of other 
scripting languages is not important.

  2. Easy to learn and easy to use.

Any comments will be greatly appreciated.



Regards,

xiaojf




From researchbase at gmail.com  Fri Nov 17 06:14:33 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Fri, 17 Nov 2006 16:44:33 +0530
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
References: <mailman.277.1163700699.32031.python-list@python.org>
	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
Message-ID: <f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>

On 17/11/06, Tim Roberts <timr at probo.com> wrote:
> Making the PDF is easy.  Go get ReportLab from www.reportlab.org.  I
> consider it the best Python PDF solution.
wow! you solved my major problem before I even asked it.  seams that
python programmers also have dynamic mind reading capability *smile*.
> Printing is more complicated, because you actually need something that can
> RENDER the PDF.  The most common such renderer is the Acrobat Reader, and
> you can actually call the Acrobat Reader from a command line with a
> parameter that tells it to print the file automatically.  The only
> disadvantage is that using that method will only print to the "default"
> printer.
double wow!  as it is my customer wants me to print to the default printer.
can you please help me with the command for rendering the pdf to the
printer with acrobat using python?
that essentially solves my most important problem.
else I was thinking to create an excel spreadsheet as a last alternative.
out of my curocity, I want to know if there are libraries that can
create excel spreadsheets?

I also wanted to know if there is a common dialog for listing out
printers under windows?
so in future if I make this software in GUI, I can at list help the
user select the printer from the list.
thanks,
Krishnakant.


From nateastle at gmail.com  Sat Nov 18 00:54:31 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 17 Nov 2006 21:54:31 -0800
Subject: basic python questions
Message-ID: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>

I have a simple assignment for school but am unsure where to go. The
assignment is to read in a text file, split out the words and say which
line each word appears in alphabetical order. I have the basic outline
of the program done which is:

def Xref(filename):
    try:
        fp = open(filename, "r")
        lines = fp.readlines()
        fp.close()
    except:
        raise "Couldn't read input file \"%s\"" % filename
    dict = {}
    for line_num in xrange(len(lines)):
        if lines[line_num] == "":  continue
        words = lines[line_num].split()
        for word in words:
            if not dict.has_key(word):
                dict[word] = []
            if line_num+1 not in dict[word]:
                dict[word].append(line_num+1)
    return dict

My question is, how do I easily parse out punction marks and how do I
sort the list and if there anything else that I am doing wrong in this
code it would be much help.



From vatamane at gmail.com  Wed Nov  8 01:43:38 2006
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 7 Nov 2006 22:43:38 -0800
Subject: Finding Nonzero Elements in a Sparse Matrix
References: <1162937813.360645.3040@h54g2000cwb.googlegroups.com>
	<1162939218.006857.100300@h54g2000cwb.googlegroups.com>
	<1162940151.208051.125810@k70g2000cwa.googlegroups.com>
Message-ID: <1162968218.656922.291890@h54g2000cwb.googlegroups.com>

de Lenn,

Sorry I assumed the nonzero would work for sparse matrices as well.

BUT! --  If the sparse matrix used is the default scipy's
sparse.lil_matrix,  you just need to print out the representation
because the lil_matrix is implemented as a _sequence of non-zero
elements_  i.e. just what you need.

In other words it is kind of silly to provide a nonzero for lil_matrix
because it has _only_ non-zero elements.

Well, here is the example:
------------------------------------
>>> from scipy import *
>>> A=sparse.lil_matrix((3,3))
>>> A[1,2]=10
>>> A[2,0]=-10
>>> print A
  (1, 2)        10
  (2, 0)        -10
>>>
------------------------------------

The only way it could be helpful is if you get a lil_matrix returned as
an object from some code and you need to list all the elements...

Hope this helps,
Nick Vatamaniuc


deLenn wrote:
> Thanks for the reply.
>
> 'nonzero' deos not seem to work with sparse matrices. here is an
> example:
>
>
> from scipy import *
> A = sparse.lil_matrix((3,3))
> A[1,2] = 10
> A[2,0] = -10
>
> nonzero(A)
> >>> ()
>
>
> (I tried it with an ordinary matrix, and it works fine)
>
> Cheers.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Nick Vatamaniuc wrote:
> > The function you might want is nonzero() or flatnonzero()
> >
> > >>> from numpy import *
> >
> > >>> a=array([ [1,2],[0,4] ])
> >
> > >>> a
> > array([[1, 2],
> >            [0, 4]])
> >
> > >>> flatnonzero(a)
> > array([0, 1, 3])
> >
> > nonzero() will return the a sequence of index arrays of non zero
> > elements
> > flatnonzero()  returns the non-zero elements of the flattened version
> > of the array.
> >
> > Cheers,
> > Nick Vatamaniuc
> >
> >
> >
> > deLenn wrote:
> > > Hi,
> > >
> > > Does scipy have an equivalent to Matlab's 'find' function, to list the
> > > indices of all nonzero elements in a sparse matrix?
> > > 
> > > Cheers.



From bbands at gmail.com  Thu Nov 30 13:56:10 2006
From: bbands at gmail.com (BBands)
Date: 30 Nov 2006 10:56:10 -0800
Subject: DDE (eSignal)
Message-ID: <1164912970.711046.214060@80g2000cwy.googlegroups.com>

I have a Python ap that needs current stock prices, which I want to get
from eSignal's DDE server. Following the win32all example:

import win32ui
import dde
server = dde.CreateServer()
server.Create("eSignalDDE")
conversation = dde.CreateConversation(server)
conversation.ConnectTo("WINROS", "Last")
last = conversation.Request("$spx")
print last

Which almost works. The return in PythonWin is the correct price as a
string with some extra chartacters appended.

'1402.670000000000\x00\x12\x00*\x00\x00\x004\xfb\x12\x00\xfd\x1a\xd9w4\xc1\x00'

Any thoughts on this?

TIA,

    jab



From kbk at shore.net  Thu Nov 16 23:38:56 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 16 Nov 2006 23:38:56 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200611170438.kAH4cu59022987@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  416 open (-14) /  3463 closed (+16) /  3879 total ( +2)
Bugs    :  930 open ( +8) /  6333 closed (+17) /  7263 total (+25)
RFE     :  244 open ( -1) /   244 closed ( +3) /   488 total ( +2)

New / Reopened Patches
______________________

tkSimpleDialog freezes when apply raises exception  (2006-11-11)
       http://python.org/sf/1594554  opened by  Hirokazu Yamamoto

Iterating closed StringIO.StringIO  (2005-11-18)
       http://python.org/sf/1359365  reopened by  doerwalter

Cross compiling patches for MINGW  (2006-11-16)
       http://python.org/sf/1597850  opened by  Han-Wen Nienhuys

Patches Closed
______________

`in` for classic object causes segfault  (2006-11-07)
       http://python.org/sf/1591996  closed by  loewis

askyesnocancel helper for tkMessageBox  (2005-11-08)
       http://python.org/sf/1351744  closed by  loewis

PyErr_CheckSignals returns -1 on error, not 1  (2006-11-07)
       http://python.org/sf/1592072  closed by  gbrandl

make pty.fork() allocate a controlling tty  (2003-11-08)
       http://python.org/sf/838546  closed by  loewis

Add missing elide argument to Text.search  (2006-11-07)
       http://python.org/sf/1592250  closed by  loewis

mailbox: use fsync() to ensure data is really on disk  (2006-06-29)
       http://python.org/sf/1514544  closed by  akuchling

mailbox (Maildir): avoid losing messages on name clash  (2006-06-29)
       http://python.org/sf/1514543  closed by  akuchling

Fix struct.pack on 64-bit archs (broken on 2.*)  (2004-10-02)
       http://python.org/sf/1038854  closed by  loewis

Cross building python for mingw32  (2003-11-13)
       http://python.org/sf/841454  closed by  loewis

httplib: allowing stream-type body part in requests  (2004-11-12)
       http://python.org/sf/1065257  closed by  loewis

support whence argument for GzipFile.seek (bug #1316069)  (2005-11-12)
       http://python.org/sf/1355023  closed by  loewis

fix for 1067728: Better handling of float arguments to seek  (2004-11-17)
       http://python.org/sf/1067760  closed by  loewis

ftplib transfer problem with certain servers  (2005-11-17)
       http://python.org/sf/1359217  closed by  loewis

bdist_rpm still can't handle dashes in versions  (2005-11-18)
       http://python.org/sf/1360200  closed by  loewis

Fix the vc8 solution files  (2006-08-19)
       http://python.org/sf/1542946  closed by  krisvale

Practical ctypes example  (2006-09-15)
       http://python.org/sf/1559219  closed by  theller

New / Reopened Bugs
___________________

Unfortunate naming of variable in heapq example  (2006-11-08)
CLOSED http://python.org/sf/1592533  opened by  Martin Thorsen Ranang

gettext has problems with .mo files that use non-ASCII chars  (2006-11-08)
CLOSED http://python.org/sf/1592627  opened by  Russell Phillips

replace groups doesn't work in this special case  (2006-11-06)
       http://python.org/sf/1591319  reopened by  tomek74

readline problem on ia64-unknown-linux-gnu  (2006-11-08)
       http://python.org/sf/1593035  opened by  Kate Minola

No IDLE in Windows  (2006-11-09)
CLOSED http://python.org/sf/1593384  opened by  A_V_I

No IDLE in Windows  (2006-11-09)
CLOSED http://python.org/sf/1593407  opened by  A_V_I

No IDLE in Windows  (2006-11-09)
CLOSED http://python.org/sf/1593442  opened by  A_V_I

site-packages isn't created before install_egg_info  (2006-09-28)
CLOSED http://python.org/sf/1566719  reopened by  loewis

Modules/unicodedata.c contains C++-style comment  (2006-11-09)
CLOSED http://python.org/sf/1593525  opened by  Mike Kent

No IDLE in Windows  (2006-11-09)
CLOSED http://python.org/sf/1593634  opened by  A_V_I

poor urllib error handling  (2006-11-09)
       http://python.org/sf/1593751  opened by  Guido van Rossum

small problem with description  (2006-11-09)
CLOSED http://python.org/sf/1593829  opened by  Atlas

Word should be changed on page 3.6.1  (2006-11-11)
CLOSED http://python.org/sf/1594742  opened by  jikanter

Make docu for dict.update more clear  (2006-11-11)
CLOSED http://python.org/sf/1594758  opened by  Christoph Zwerschke

make install fails, various modules do not work  (2006-11-11)
CLOSED http://python.org/sf/1594809  opened by  Evan

doctest simple usage recipe is misleading  (2006-11-12)
       http://python.org/sf/1594966  opened by  Ken Rimey

smtplib.SMTP.sendmail() does not provide transparency  (2006-11-12)
CLOSED http://python.org/sf/1595045  opened by  Avi Kivity

texinfo library documentation fails to build  (2006-11-12)
       http://python.org/sf/1595164  opened by  Mark Diekhans

User-agent header added by an opener is "frozen"  (2006-11-13)
       http://python.org/sf/1595365  opened by  Bj?rn Steinbrink

parser module bug for nested try...except statements  (2006-11-13)
CLOSED http://python.org/sf/1595594  opened by  Kay Schluehr

SocketServer allow_reuse_address checked in constructor  (2006-11-13)
       http://python.org/sf/1595742  opened by  Peter Parente

read() in windows stops on chr(26)  (2006-11-13)
       http://python.org/sf/1595822  opened by  reson5

KeyError at exit after 'import threading' in other thread  (2006-11-14)
       http://python.org/sf/1596321  opened by  Christian Walther

HTTP headers  (2006-11-15)
       http://python.org/sf/1597000  opened by  Hugo Leisink

Reading with bz2.BZ2File() returns one garbage character  (2006-11-15)
       http://python.org/sf/1597011  opened by  Clodoaldo Pinto Neto

Can't exclude words before capture group  (2006-11-15)
CLOSED http://python.org/sf/1597014  opened by  Cees Timmerman

sqlite timestamp converter bug (floating point)  (2006-11-15)
       http://python.org/sf/1597404  opened by  Michael Salib

"Report website bug" -> Forbidden :(  (2006-11-16)
CLOSED http://python.org/sf/1597570  opened by  Jens Diemer

Modules/readline.c fails to compile on AIX 4.2  (2006-11-16)
       http://python.org/sf/1597798  opened by  Mike Kent

atexit.register does not return the registered function.   (2006-11-16)
CLOSED http://python.org/sf/1597824  opened by  Pierre Rouleau

Python/ast.c:541: seq_for_testlist: Assertion fails  (2006-11-16)
CLOSED http://python.org/sf/1597930  opened by  Darrell Schiebel

Top-level exception handler writes to stdout unsafely  (2006-11-16)
       http://python.org/sf/1598083  opened by  Jp Calderone

Bugs Closed
___________

Unfortunate naming of variable in heapq example  (2006-11-08)
       http://python.org/sf/1592533  closed by  gbrandl

gettext has problems with .mo files that use non-ASCII chars  (2006-11-08)
       http://python.org/sf/1592627  closed by  avantman42

problem building python in vs8express  (2006-11-06)
       http://python.org/sf/1591122  closed by  loewis

No IDLE in Windows  (2006-11-09)
       http://python.org/sf/1593384  closed by  loewis

No IDLE in Windows  (2006-11-09)
       http://python.org/sf/1593407  deleted by  akuchling

mailbox.Maildir.get_folder() loses factory information  (2006-10-03)
       http://python.org/sf/1569790  closed by  akuchling

No IDLE in Windows  (2006-11-09)
       http://python.org/sf/1593442  deleted by  gbrandl

site-packages isn't created before install_egg_info  (2006-09-28)
       http://python.org/sf/1566719  closed by  pje

Modules/unicodedata.c contains C++-style comment  (2006-11-09)
       http://python.org/sf/1593525  closed by  doerwalter

No IDLE in Windows  (2006-11-09)
       http://python.org/sf/1593634  deleted by  gbrandl

small problem with description  (2006-11-09)
       http://python.org/sf/1593829  deleted by  bauersj

Word should be changed on page 3.6.1  (2006-11-11)
       http://python.org/sf/1594742  closed by  gbrandl

Make docu for dict.update more clear  (2006-11-11)
       http://python.org/sf/1594758  closed by  gbrandl

make install fails, various modules do not work  (2006-11-11)
       http://python.org/sf/1594809  closed by  loewis

gzip.GzipFile.seek missing second argument  (2005-10-07)
       http://python.org/sf/1316069  closed by  loewis

smtplib.SMTP.sendmail() does not provide transparency  (2006-11-12)
       http://python.org/sf/1595045  deleted by  avik

parser module bug for nested try...except statements  (2006-11-13)
       http://python.org/sf/1595594  closed by  gbrandl

Can't exclude words before capture group  (2006-11-15)
       http://python.org/sf/1597014  closed by  gbrandl

"Report website bug" -> Forbidden :(  (2006-11-16)
       http://python.org/sf/1597570  closed by  gbrandl

atexit.register does not return the registered function.   (2006-11-16)
       http://python.org/sf/1597824  closed by  gbrandl

quoted printable parse the sequence '= ' incorrectly  (2006-10-31)
       http://python.org/sf/1588217  closed by  gbrandl

Python/ast.c:541: seq_for_testlist: Assertion fails  (2006-11-16)
       http://python.org/sf/1597930  closed by  gbrandl

New / Reopened RFE
__________________

"".translate() docs should mention string.maketrans()  (2006-11-08)
       http://python.org/sf/1592899  opened by  Ori Avtalion

base64 doc Python 2.3 <-> 2.4  (2006-11-16)
CLOSED http://python.org/sf/1597576  opened by  Jens Diemer

RFE Closed
__________

wsgi.org link in wsgiref  (2006-08-18)
       http://python.org/sf/1542920  closed by  akuchling

Move gmtime function from calendar to time module  (2003-03-05)
       http://python.org/sf/697985  closed by  akuchling

base64 doc Python 2.3 <-> 2.4  (2006-11-16)
       http://python.org/sf/1597576  closed by  gbrandl



From gh at gregor-horvath.com  Tue Nov 21 07:24:23 2006
From: gh at gregor-horvath.com (Gregor Horvath)
Date: Tue, 21 Nov 2006 13:24:23 +0100
Subject: Reference class in class creation
Message-ID: <a1b59$4562eff8$547078de$21737@news.chello.at>

Hi,

I want to reference a class itself in its body:

class SomeElement(object):
	def __init__(self, mycontainer):
		self.mycontainer=mycontainer	
	
class SomeContainer(object):
	a = SomeElement(SomeContainer)


Unfortunatly this does not work since the name SomeContainer is not
definied at class creation time of SomeContainer:

/tmp/python-9309vMe.py in SomeContainer()
      4 	
      5 class SomeContainer(object):
----> 6 	a = SomeElement(SomeContainer)
      7
      8

NameError: name 'SomeContainer' is not defined


How to do this?

Unfortunatly the obvious:

class SomeContainer(object):
	def __init__(self):
		self.a = SomeElement(SomeContainer)

is not possible because of other constraints.

-- 
 Servus, Gregor



From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 18:36:17 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 00:36:17 +0100
Subject: another newbie question
In-Reply-To: <mailman.155.1163518906.32031.python-list@python.org>
References: <mailman.155.1163518906.32031.python-list@python.org>
Message-ID: <455b9f7a$0$18812$426a74cc@news.free.fr>

Mary Jane Boholst a ?crit :
> Hello everyone,
> I have a question that google couldnt answer for me and thought that the
> brains on here might be able to help.
> I am trying to upload a file to a database

What do you mean "upload a file to a database" ? I know how to uplaod a 
file (from a web form to a server), I know how to either store metadata 
about a file in a database, I know how to write code that will parse a 
file content to store it into a database, but I have hard time 
understanding exactly what you're trying to do.


From miles.chris at gmail.com  Wed Nov 15 10:35:52 2006
From: miles.chris at gmail.com (Chris Miles)
Date: Wed, 15 Nov 2006 15:35:52 +0000
Subject: Python speed on Solaris 10
In-Reply-To: <1163568612.716692.31250@m7g2000cwm.googlegroups.com>
References: <mailman.154.1163518812.32031.python-list@python.org>
	<1163568612.716692.31250@m7g2000cwm.googlegroups.com>
Message-ID: <ejfc4o$6lk$1@sea.gmane.org>

Since my post I have compiled Python 2.4.3 with Sun Studio 11 with 
"-fast" option (on Solaris 10) which has produced the fastest version of 
Python I've been able to test on this hardware, including the CentOS 
Linux version (which I'm pleased about).

I haven't looked into more optimal gcc build options yet, so that may 
produce a faster build, but I am probably satisfied with what Sun Studio 
has given me for now.

Cheers,
Chris

casevh at comcast.net wrote:

> I noticed that speed difference, too. After running ./configure, I
> edited the resulting Makefile to pass "-march=athlon-mp" to the C
> compiler. ./configure seems to ignore CFLAGS, for example, so I just
> edited Makefile to suit my environment. You should set the values
> appropriate for you system, of course.
> 
> I've also compiled Python using the Sun Studio compiler. Some tests
> were faster, some tests were slower.

-- 
http://chrismiles.info/



From Roka100 at gmail.com  Mon Nov 20 01:24:16 2006
From: Roka100 at gmail.com (Jia Lu)
Date: 19 Nov 2006 22:24:16 -0800
Subject: An error installing MoinWiki
Message-ID: <1164003856.545942.169750@k70g2000cwa.googlegroups.com>

Hi all
 I tried to install moinmoinWiki. But after installing with the guide,
I got the error when I access the test page
"http://localhost/moinWiki?action=test".
...
...
testBasicPackageThings
(MoinMoin._tests.test_packages.UnsafePackageTestcase) ... ERROR
...
...
======================================================================
ERROR: testBasicPackageThings
(MoinMoin._tests.test_packages.UnsafePackageTestcase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File
"/usr/lib/python2.4/site-packages/MoinMoin/_tests/test_packages.py",
line 54, in setUp
    raise TestSkipped('This test needs to be run using the test wiki.')
TestSkipped: This test needs to be run using the test wiki.

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

Does anyone know how to solve it ?
Thanx



From WESTPAC851 at aol.com  Tue Nov 28 16:33:03 2006
From: WESTPAC851 at aol.com (WESTPAC851 at aol.com)
Date: Tue, 28 Nov 2006 16:33:03 EST
Subject: wanna stop by my homemade glory hole?
Message-ID: <cd5.2e248ec.329e050f@aol.com>

have you used the cubby hole before?
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From deets at nospam.web.de  Mon Nov 27 13:07:34 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Nov 2006 19:07:34 +0100
Subject: Calling a thread asynchronously with a callback
References: <mailman.774.1164649819.32031.python-list@python.org>
Message-ID: <4t0nr6F110supU1@mid.uni-berlin.de>

Edwin Gomez wrote:

> I'm a C# developer and I'm new to Python.  I would like to know if the
> concept of Asynchronous call-backs exists in Python.  Basically what I
> mean is that I dispatch a thread and when the thread completes it invokes
> a method from the calling thread.  Sort event driven concept with threads.

Counter question: does such a thing exist in C#, and if, is it bound to some
existing event loop? 

I'm really curious, because having code being interrupted at any time by a
asynchronous callback strikes me as dangerous. But then maybe I'm just a
whimp :)

Diez


From robert.kern at gmail.com  Mon Nov  6 15:29:58 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 06 Nov 2006 14:29:58 -0600
Subject: Unicode/ascii encoding nightmare
In-Reply-To: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
References: <1162842650.780517.180360@b28g2000cwb.googlegroups.com>
Message-ID: <eio60e$5pp$1@sea.gmane.org>

Thomas W wrote:
> I'm getting really annoyed with python in regards to
> unicode/ascii-encoding problems.
> 
> The string below is the encoding of the norwegian word "f?dselsdag".
> 
>>>> s = 'f\xc3\x83\xc2\xb8dselsdag'
> 
> I stored the string as "f?dselsdag" but somewhere in my code it got
> translated into the mess above and I cannot get the original string
> back. It cannot be printed in the console or written a plain text-file.
> I've tried to convert it using
> 
>>>> s.encode('iso-8859-1')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)
> 
>>>> s.encode('utf-8')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1:
> ordinal not in range(128)
> 
> And nothing helps. I cannot remember hacing these problems in earlier
> versions of python and it's really annoying, even if it's my own fault
> somehow, handling of normal characters like this shouldn't cause this
> much hassle. Searching google for "codec can't decode byte" and
> UnicodeDecodeError etc. produces a bunch of hits so it's obvious I'm
> not alone.

You would want .decode() (which converts a byte string into a Unicode string),
not .encode() (which converts a Unicode string into a byte string). You get
UnicodeDecodeErrors even though you are trying to .encode() because whenever
Python is expecting a Unicode string but gets a byte string, it tries to decode
the byte string as 7-bit ASCII. If that fails, then it raises a UnicodeDecodeError.

However, I don't know of an encoding that takes u"f?dselsdag" to
'f\xc3\x83\xc2\xb8dselsdag'.

-- 
Robert Kern

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



From george.sakkis at gmail.com  Sun Nov 12 19:42:53 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 12 Nov 2006 16:42:53 -0800
Subject: reduce to be removed?
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>
	<mailman.2111.1163283905.11739.python-list@python.org>
	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<mailman.2116.1163286891.11739.python-list@python.org>
	<1163288885.884417.218270@f16g2000cwb.googlegroups.com>
	<mailman.2118.1163289463.11739.python-list@python.org>
	<1163290526.013063.245130@m7g2000cwm.googlegroups.com>
	<mailman.2122.1163291415.11739.python-list@python.org>
	<1163295752.701124.322620@h54g2000cwb.googlegroups.com>
	<mailman.2127.1163297289.11739.python-list@python.org>
	<1163298336.778941.138540@m73g2000cwd.googlegroups.com>
	<mailman.0.1163325764.32031.python-list@python.org>
	<1163347835.815187.216180@e3g2000cwe.googlegroups.com>
Message-ID: <1163378573.018479.261660@b28g2000cwb.googlegroups.com>

Dustan wrote:

> Alright, I can see I'm a bit outvoted here. I tried your suggestions
> and it worked fine.
>
> I'll also try to consider in the future that part of the problem might
> be lack of information conveyed on my part.

If you insist on one-liners, it can be done without sum(), though it
probably doesn't buy you much in readability:

from itertools import chain
[list(chain(*row)) for row in foo]

By the way, if this was not a toy example and you're doing serious work
with n-dimensional arrays, make yourself a favor and install NumPy;
it's usually both faster and more elegant for array manipulations than
pure python.

George



From alain.marcel at svd-info.fr  Mon Nov 13 07:46:37 2006
From: alain.marcel at svd-info.fr (alain.marcel at svd-info.fr)
Date: 13 Nov 2006 04:46:37 -0800
Subject: logging
In-Reply-To: <4rqukpFshgdkU1@mid.uni-berlin.de>
References: <1163404240.288572.38420@i42g2000cwa.googlegroups.com>
	<4rqukpFshgdkU1@mid.uni-berlin.de>
Message-ID: <1163421996.988808.205220@b28g2000cwb.googlegroups.com>


Diez B. Roggisch wote:
> alain.marcel at svd-info.fr wrote:
>
> > Hi all !
> > How to remove a logger ?
> > There si no logging.removeLogger(name) method.
> > I've a lot of objects that create loging.
> > When objects are destroyed, associated logger are not. This create
> > memory leak...
>
> Instead of removing unused loggers, reuse them. Calling getLogger with an
> already known name will not create a new one, but instead return the
> already existing one.
>
> Diez

Hi

That's a good idea but object name change (necessity).
The only issue seems to have a pool of loggers and select one into it.
I have to encapsulate logging library...
Thanks a lot.

Any ideas ?



From steve at holdenweb.com  Wed Nov  8 17:35:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Nov 2006 16:35:34 -0600
Subject: is this the right way to do subclasses?
In-Reply-To: <45524da8$0$32427$c3e8da3@news.astraweb.com>
References: <45522074$0$17101$c3e8da3@news.astraweb.com>	<eitajt$bsk$03$1@news.t-online.com>	<45523133$0$14421$c3e8da3@news.astraweb.com>	<eith0g$t7e$02$1@news.t-online.com>	<45524d03$0$32427$c3e8da3@news.astraweb.com>
	<45524da8$0$32427$c3e8da3@news.astraweb.com>
Message-ID: <eitm1d$hlq$1@sea.gmane.org>

John Salerno wrote:
> John Salerno wrote:
>> Peter Otten wrote:
>>
>>> Try it: Fighter(...) will implicitly call Character.__init__(...).
>> Ok, I'm confused! :) I thought you had to explicity call a base class's 
>> __init__ method? How is it doing this?
> 
> Wait, I just might be an idiot. Is it not even necessary for me to call 
> Character's __init__ method? Fighter will inherit it automatically and 
> call it when a Fighter object is created, right?
> 
By Jove, he's got it!

> If that's the case, then I don't know what I was thinking! I guess I was 
> thinking more along the lines of how in wxPython, when you subclass a 
> Frame, you have to call Frame.__init__, but maybe that's only because 
> you then do your own stuff in a custom __init__ class, which would have 
> otherwise overridden the Frame.__init__.
> 
> In this case, I need Character.__init__ and nothing else, right? Now 
> your other method is making sense to me too! :)

Nice one.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From robert.kern at gmail.com  Thu Nov  9 17:59:12 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 09 Nov 2006 16:59:12 -0600
Subject: Simple question to split
In-Reply-To: <4rhov8Frk45nU1@mid.uni-berlin.de>
References: <4rhov8Frk45nU1@mid.uni-berlin.de>
Message-ID: <ej0bs9$8oe$1@sea.gmane.org>

Matthias Winterland wrote:
> Hi,
> 
> I have a simple question. When I read in a string like:
> a='1,2,3,4,5 6 7,3,4', can I get the list l=[1,2,3,4,5,6,7,3,4] with a 
> single split-call?

You can't get what you want with a single method call. You can do it with a
single call to .split() if you preprocess the string first:

  a.replace(',', ' ').split()

-- 
Robert Kern

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



From srikrishnamohan at gmail.com  Thu Nov  9 15:17:07 2006
From: srikrishnamohan at gmail.com (km)
Date: Fri, 10 Nov 2006 01:47:07 +0530
Subject: cross connecting
Message-ID: <f4cc03640611091217o77d966f6y2e8082bae09a2590@mail.gmail.com>

HI all,

I have a c executable in machine A which cannot execute on B.
I am on machine B and i need python program to connect to A via telnet  and
run the program with arguments passed from program on B  and at the end
fetch back  results to machine B.
i would like to know , which set of modules are suitable for this sort of a
work ?

regards,
KM
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From craigtw.online at gmail.com  Sun Nov 26 17:18:42 2006
From: craigtw.online at gmail.com (Craig)
Date: 26 Nov 2006 14:18:42 -0800
Subject: Generating header information using ElementTree
In-Reply-To: <mailman.744.1164575372.32031.python-list@python.org>
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
Message-ID: <1164579522.671325.36260@14g2000cws.googlegroups.com>

Fredrik Lundh wrote:

> Craig wrote:
>
> > I'm only new to Python so please bear with me.  I using ElementTree to
> > generate an XML file that will reference a DTD and an XSL file.  The
> > header information I want at the start of the file is as follows:
> >
> > <?xml version="1.0"?>
> > <?xml-stylesheet type="text/xsl" href="test.xsl"?>
> > <!DOCTYPE BobActivityLog SYSTEM "test.dtd">
> >
> > How do you add this header information to the tree
>
> to the file, you mean?  use print.
>
> </F>

Thanks for the quick response.  Here is the code I am using to manually
write to the file is:

    outFile = open("record.xml", 'w')
    outFile.write = ("<?xml version=\"1.0\"?>\n")
    outFile.write = ("<?xml-stylesheet type=\"text/xsl\"
href=\"test.xsl\"?>\n")
    outFile.write = ("<!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n")
    outFile.close()

When I run the code I get the following error message:

Traceback (most recent call last):
  File "bob-xml.py", line 189, in <module>
    main()
  File "bob-xml.py", line 173, in main
    outFile.write = ("<?xml version=\"1.0\"?>\n")
AttributeError: 'file' object attribute 'write' is read-only

What am I doing wrong here?  If anyone could help that would be
appreciated.  Thanks again.


Craig



From sjmachin at lexicon.net  Thu Nov  9 20:56:03 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 17:56:03 -0800
Subject: Excel file read/write?
In-Reply-To: <1163119339.334965.264850@i42g2000cwa.googlegroups.com>
References: <1163119339.334965.264850@i42g2000cwa.googlegroups.com>
Message-ID: <1163123763.386857.255540@m7g2000cwm.googlegroups.com>


Podi wrote:
> As far as I know, there is pyXLWriter for writing and xlrd for reading.

Most folk would seem to be using pyExcelerator rather than pyXLWriter.
It is much more up to date, it just hasn't been worked on for a year,
whereas pyXLWriter is obsolete (doesn't write latest Excel file format)
and is deliberately/officially in Norwegian Blue Parrot emulation mode.

> Is there such thing so that one can open an Excel file into memory and
> read/update any sheet/cell on the fly. One analogy to this is the
> ConfigParser module.

There is no pure Python platform-independent facility that requires no
other software to be installed. Your choices are:

1. Python COM interface (part of
http://sourceforge.net/projects/pywin32/) with lots of users (and hence
readily available help in this newsgroup), examples, etc -- but
requires (a) Windows OS (b) Microsoft Excel

2. OpenOffice.org has a built-in Python -- 2.n where n is a small
number :-( and almost impenetrable documentation -- Sybren Stuvel has
published some examples: http://www.stuvel.eu/ooo-python
but my guess is that all the users of the OOo interface could fit in a
taxi.

3. Gnumeric is rumoured to have a similar scripting facility.



From tim at tdw.net  Thu Nov 23 06:24:59 2006
From: tim at tdw.net (Tim Williams)
Date: Thu, 23 Nov 2006 11:24:59 +0000
Subject: "10, 20, 30" to [10, 20, 30]
In-Reply-To: <R58378704.87.45136.1@mxextra>
References: <R58378704.87.45136.1@mxextra>
Message-ID: <9afea2ac0611230324m445e8d26g8e4f2f9d5d6bab5b@mail.gmail.com>

On 23 Nov 2006 03:13:10 -0800, Daniel Austria <futurebase at gmx.at> wrote:
> Sorry,
>
> how can i convert a string like "10, 20, 30" to a list [10, 20, 30]
>
> what i can do is:
>
> s = "10, 20, 30"
> tmp = '[' + s + ']'
> l = eval(tmp)
>
> but in my opinion this is not a nice solution
>

Not nice, especially if you can't control what is in s :)

A simple solution if you know s will always contain string
representations of integers is:

>>> s = "10, 20, 30"
>>> [int(x) for x in s.split(',')]
[10, 20, 30]
>>>

Otherwise a good starting point might be:

>>> for i in s.split(','):

HTH :)


From pf_moore at yahoo.co.uk  Tue Nov 21 17:51:10 2006
From: pf_moore at yahoo.co.uk (Paul Moore)
Date: Tue, 21 Nov 2006 22:51:10 +0000
Subject: Subprocess module - communicate(data) dealing with errors
Message-ID: <ud57gct29.fsf@yahoo.co.uk>

I've just hit an annoying corner case in the subprocess module. I'm
trying to run a process, pass it some input and capture output and
error data:

    cmd = ['tr', 'a-z', 'A-Z']
    p = Popen(cmd, stdin=PIPE, stout=PIPE, stderr=PIPE)
    out, err = p.communicate("Hello, world!")

This works really well, *except* if cmd has an error (for example, add
an extra argument). In that case, the subprocess finishes before the
communicate() call, and so the communicate() call fails with an
IOError writing to the subprocess' stdin handle.

The trouble is, as far as I can tell, this is a race condition - I can
check (with poll()) if the command has terminated before I try
communicate(), but there's still a chance it terminates between the
poll and the communicate.

I'd really like to make this as near to foolproof as I can - this is
to go into a server process, and tracebacks aren't really suitable
output... :-) Can anyone suggest a way I can code defensively round
this?

In case it matters, I'm running on Windows - I don't know enough about
POSIX to say if the same issue occurs there.

Thanks for any suggestions,
Paul.
-- 
Most conversations are simply monologues delivered in the presence of
witnesses. -- Margaret Millar


From davigoli at gmail.com  Wed Nov 22 00:17:59 2006
From: davigoli at gmail.com (David Golightly)
Date: 21 Nov 2006 21:17:59 -0800
Subject: filling forms automatically generated using javascript
In-Reply-To: <1164170329.515873.311900@h48g2000cwc.googlegroups.com>
References: <1164170329.515873.311900@h48g2000cwc.googlegroups.com>
Message-ID: <1164172679.184812.176670@m7g2000cwm.googlegroups.com>


John wrote:
> Is there an automatic way of filling forms that have been generated
> using javascript?
> I tried to use python+mechanize but am having trouble with javascript
> forms.
>

Yes, it depends on what you're trying to do of course, but usually you
just set the input element's "value" property.  (The exception here is
<input type="file">, where the value property is read-only for security
reasons.)  This can be done even without javascript; just set the value
attribute in the HTML code if you want default values.  It shouldn't
matter what your backend language is.

> This is the way the form is created:
>
> <script
> src="/WebResource.axd?d=uz45jgd0NVyzsVJV_sZDrjxBvvX2yHd3hs2IGgfXLN3pPD65PTl8Gec4qFJa35leX_j-S-HQNzQg1sDk82eQYafpf0w9zI7HaoMUnMjb9ihQ96Tf0qvT-Air__85j5db0&amp;t=632972974720000000"
> type="text/javascript"></script>

We really can't do anything with that.  The url is useless because it's
not absolute, so we can't look at your code.  Please post a working
link if you want help.

Thanks,

David



From researchbase at gmail.com  Thu Nov 16 13:11:36 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 16 Nov 2006 23:41:36 +0530
Subject: how to print pdf with python on a inkjet printer.
Message-ID: <f81479dd0611161011s2be68b1el32abeb4073ef603c@mail.gmail.com>

hello all.
I am developing an ncurses based python application that will require
to create pdf reports for printing.
I am not using py--qt or wx python.
it is a consol based ui application and I need to make a pdf report
and also send it to a lazer or ink jet printer.
is it possible to do so with python?
or is it that I will have to use the wxpython library asuming that
there is a print dialog which can open up the list of printers?
if wx python and gui is the only way then it is ok but I will like to
keep this application on the ncurses side.

thanks.
Krishnakant.


From gagsl-py at yahoo.com.ar  Tue Nov 14 14:34:56 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 14 Nov 2006 16:34:56 -0300
Subject: __cmp__ between dissimilar objects
In-Reply-To: <1163522471.707278.178600@e3g2000cwe.googlegroups.com>
References: <1163464397.679361.215050@m7g2000cwm.googlegroups.com>
	<mailman.112.1163471381.32031.python-list@python.org>
	<1163522471.707278.178600@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061114163435.01d584b8@yahoo.com.ar>

At Tuesday 14/11/2006 13:41, insyte at gmail.com wrote:

> > When the rich comparison methods raise NotImplementedError, the
> > comparison logic inside the interpreter tries reversing the operands.
>
>Can you point me to a description of this algorithm?  It doesn't seem
>to be described in the documentation for the rich comparison or __cmp__
>methods...

PEP 207
http://www.python.org/dev/peps/pep-0207/


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From __peter__ at web.de  Thu Nov 16 05:39:57 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Nov 2006 11:39:57 +0100
Subject: split CSV fields
References: <ejhduq$l5l$1@news.albasani.net>
Message-ID: <ejhf54$2jc$03$1@news.t-online.com>

robert wrote:

> What is a most simple expression for splitting a CSV line with "-protected
> fields?
> 
> s='"123","a,b,\"c\"",5.640'

>>> import csv
>>> class mydialect(csv.excel):
...     escapechar = "\\"
...
>>> csv.reader(['"123","a,b,\\"c\\"",5.640'], dialect=mydialect).next()
['123', 'a,b,"c"', '5.640']

Peter



From e0427417 at student.tuwien.ac.at  Sun Nov 26 18:25:52 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Mon, 27 Nov 2006 00:25:52 +0100
Subject: Generator question
In-Reply-To: <mailman.734.1164533418.32031.python-list@python.org>
References: <ebf8d36c0611260117m2d9b5b33j8af7fc4636bf9834@mail.gmail.com>
	<mailman.734.1164533418.32031.python-list@python.org>
Message-ID: <456a2204$0$11868$3b214f66@tunews.univie.ac.at>

Robert Kern wrote:
> Timothy Wu wrote:
>> Hi,
>>
>> Using generator recursively is not doing what I expect:
>>
>> def test_gen(x):
>>     yield x
>>     x = x - 1
>>     if x != 0:
>>         test_gen(x)
> 
> The only thing that the last line does is *create* a new generator object. You
> need to actually iterate over it and yield its values. E.g.
> 
> 
> In [2]: def test_gen(x):
>    ...:     yield x
>    ...:     x -= 1
>    ...:     if x != 0:
>    ...:         for y in test_gen(x):
>    ...:             yield y
>    ...:
>    ...:
> 
> In [3]: list(test_gen(3))
> Out[3]: [3, 2, 1]
> 
> 

why not this?

def test_gen(x):
	for y in xrange(x,0,-1):
		yield y

or even better/shorter:

test_gen = lambda x: xrange(x,0,-1)


From fredrik at pythonware.com  Sun Nov 19 05:35:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 11:35:26 +0100
Subject: Why isn't SPLIT splitting my strings
In-Reply-To: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
References: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>
Message-ID: <ejpc1d$qio$1@sea.gmane.org>

ronrsr wrote:

> I'm trying to break up the result tuple into keyword phrases.  The
> keyword phrases are separated by a ;  -- the split function is not
> working the way I believe it should be. 

 >>> help(str.split)

split(...)
     S.split([sep [,maxsplit]]) -> list of strings

     Return a list of the words in the string S, using sep as the
     delimiter string.

note that it says *delimiter string*, not *list of characters that I 
want it to split on*.

</F>



From no-spam at no-spam-no-spam.com  Thu Nov  2 13:32:54 2006
From: no-spam at no-spam-no-spam.com (robert)
Date: Thu, 02 Nov 2006 19:32:54 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
Message-ID: <eiddl5$qpn$1@news.albasani.net>

I'd like to use multiple CPU cores for selected time consuming Python computations (incl. numpy/scipy) in a frictionless manner.

Interprocess communication is tedious and out of question, so I thought about simply using a more Python interpreter instances (Py_NewInterpreter) with extra GIL in the same process.
I expect to be able to directly push around Python Object-Trees between the 2 (or more) interpreters by doing some careful locking.

Any hope to come through? If possible, what are the main dangers? Is there an example / guideline around for that task? - using ctypes or so.

Or is there even a ready made Python module which makes it easy to setup and deal with extra Interpreter instances? 
If not, would it be an idea to create such thing in the Python std libs to make Python multi-processor-ready. I guess Python will always have a GIL - otherwise it would loose lots of comfort in threaded programming


robert


From gagsl-py at yahoo.com.ar  Thu Nov 16 20:59:54 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 16 Nov 2006 22:59:54 -0300
Subject: Writing to Registry
In-Reply-To: <kKKdnZ2xUaRSmcDYnZ2dnUVZ_oOdnZ2d@adelphia.com>
References: <Lf-dnZpDM_0uZcHYnZ2dnUVZ_oKdnZ2d@adelphia.com>
	<mailman.295.1163723213.32031.python-list@python.org>
	<kKKdnZ2xUaRSmcDYnZ2dnUVZ_oOdnZ2d@adelphia.com>
Message-ID: <7.0.1.0.0.20061116225853.03fcf890@yahoo.com.ar>

At Thursday 16/11/2006 21:39, Samantha wrote:

> > http://docs.python.org/lib/module--winreg.html#l2h-5827
>Thanks for the link.

Notice that surely you already have the full Python documentation, it 
comes with the standard distribution.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From moonbee5555555555 at yahoo.com  Thu Nov 30 16:00:47 2006
From: moonbee5555555555 at yahoo.com (Boneh)
Date: 30 Nov 2006 13:00:47 -0800
Subject: How can I change the icon
Message-ID: <1164920447.562855.159040@h54g2000cwb.googlegroups.com>

Is it possible to change the icon "Tk" of the windows popped up ?



From ratchetgrid at googlemail.com  Sat Nov 25 17:30:49 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sat, 25 Nov 2006 22:30:49 +0000
Subject: Graph Data Structures
In-Reply-To: <1164483939.464327.143450@f16g2000cwb.googlegroups.com>
References: <mailman.714.1164463530.32031.python-list@python.org>
	<1164465588.399198.173830@f16g2000cwb.googlegroups.com>
	<1164483939.464327.143450@f16g2000cwb.googlegroups.com>
Message-ID: <676224240611251430s6b938db2jd7ee59abd5eef0e8@mail.gmail.com>

> > https://networkx.lanl.gov/

This was working for me earlier, I managed to get everything from
there earlier. It seems a very good package. It seems theres more out
there than what I had thought, which unfortunately makes it harder for
me to decide what to use (pynetwork and bgl look useful aswell). I m
going to do some testing on it later and see what happens with it.
Thanks a lot for your help.

Has anyone got an idea how I could split the contents of a node and
its representation (to save memory in my graph). ie.... the nodes
contain the start and end coordinates and id and the actual
representation contains the string. I was going to have :

class Node(object):
    pass

class Section(Node):
    pass

class Item(object):
   pass

Where section contains a slice of the Item which im interested. I m
just not sure how I can access the contents of item without storing
it. ---> If u get what I mean???

Many Thanks in advance

Nathan


From jibalamy at free.fr  Sun Nov 26 13:34:56 2006
From: jibalamy at free.fr (Jiba)
Date: Sun, 26 Nov 2006 19:34:56 +0100
Subject: acessing to the raw data of an email message
Message-ID: <20061126193456.2bb5d97a@autremonde>

Hi,

I'm using the email Python package for parsing mail and checking GPG signature.

The Message object doesn't store the raw message data. Message.as_string "rebuild" the whole message, for example it may gives:

Content-Disposition: attachment; filename=text.txt

whereas the original message was containing:

Content-Disposition: attachment;
 filename=text.txt

From the RFC point of view, both are equivalent. However, when checking the signature using GPG, there are not the same for GPG, and thus the check fails.

Does anyone have an idea ? I think it would be nice to let the parser add the raw message data in the Message object.

Thanks,
Jiba


From ptmcg at austin.rr._bogus_.com  Wed Nov 22 16:42:26 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 22 Nov 2006 21:42:26 GMT
Subject: PyParsing and Headaches
References: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
Message-ID: <6v39h.2422$Gk5.2255@tornado.texas.rr.com>

"Bytter" <bytter at gmail.com> wrote in message 
news:1164223072.219676.157790 at j44g2000cwa.googlegroups.com...
> Hi,
>
> I'm trying to construct a parser, but I'm stuck with some basic
> stuff... For example, I want to match the following:
>
> letter = "A"..."Z" | "a"..."z"
> literal = letter+
> include_bool := "+" | "-"
> term = [include_bool] literal
>
> So I defined this as:
>
> literal = Word(alphas)
> include_bool = Optional(oneOf("+ -"))
> term = include_bool + literal
>
> The problem is that:
>
> term.parseString("+a") -> (['+', 'a'], {}) # OK
> term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
> recognize any token since I didn't said the SPACE was allowed between
> include_bool and literal.
>

As Chris pointed out in his post, the most direct way to fix this is to use 
Combine.  Note that Combine does two things: it requires the expressions to 
be adjacent, and it combines the results into a single token.  For instance, 
when defining the expression for a real number, something like:

realnum = Optional(oneOf("+ -")) + Word(nums) + "." + Word(nums)

Pyparsing would parse "3.14159" into the separate tokens ['', '3', '.', 
'14159'].  For this grammar, pyparsing would also accept "2. 23" as ['', 
'2', '.', '23'], even though there is a space between the decimal point and 
"23".  But by wrapping it inside Combine, as in:

realnum = Combine(Optional(oneOf("+ -")) + Word(nums) + "." + Word(nums))

we accomplish two things: pyparsing only matches if all the elements are 
adjacent, with no whitespace or comments; and the matched token is returned 
as ['3.14159'].  (Yes, I left off scientific notation, but it is an 
extension of the same issue.)

Pyparsing in general does implicit whitespace skipping; it is part of the 
zen of pyparsing, and distinguishes it from conventional regexps (although I 
think there is a new '?' switch for re's that puts '\s*'s between re terms 
for you).  This is to simplify the grammar definition, so that it doesn't 
need to be littered with "optional whitespace or comments could go here" 
expressions; instead, whitespace and comments (or "ignorables" in pyparsing 
terminology) are parsed over before every grammar expression.  I instituted 
this out of recoil from a previous project, in which a co-developer 
implemented a boolean parser by first tokenizing by whitespace, then parsing 
out the tokens.  Unfortunately, this meant that "color=='blue' && 
size=='medium'" would not parse successfully, instead requiring "color == 
'blue' && size == 'medium'".  It doesn't seem like much, but our support 
guys got many calls asking why the boolean clauses weren't matching.  I 
decided that when I wrote a parser, "y=m*x+b" would be just as parseable as 
"y = m * x + b".  For that matter, you'd be surprised where whitespace and 
comments sneak in to people's source code: spaces after left parentheses and 
comments after semicolons, for example, are easily forgotten when spec'ing 
out the syntax for a C "for" statement; whitespace inside HTML tags is 
another unanticipated surprise.

So looking at your grammar, you say you don't want to have this be a 
successful parse:
    term.parseString("+ a") -> (['+', 'a'], {})

because, "It shouldn't recognize any token since I didn't said the SPACE was 
allowed between include_bool and literal."  In fact, pyparsing allows spaces 
by default, that's why the given parse succeeds.  I would turn this question 
around, and ask you in terms of your grammar - what SHOULD be allowed 
between include_bool and literal?  If spaces are not a problem, then your 
grammar as-is is sufficient.  If spaces are absolutely verboten, then there 
are 2 or 3 different techniques in pyparsing to disable the 
whitespace-skipping behavior, depending on whether you want all whitespace 
skipping disabled, just for literals of a certain type, or just for literals 
when following a leading include_bool sign.

Thanks for giving pyparsing a try; if you want further help, you can post 
here, or on the pyparsing wiki - the discussion threads on the Home page are 
a pretty good support and message log.

-- Paul




From bytter at gmail.com  Thu Nov 23 10:30:48 2006
From: bytter at gmail.com (Bytter)
Date: 23 Nov 2006 07:30:48 -0800
Subject: PyParsing and Headaches
In-Reply-To: <1164283023.996975.292750@f16g2000cwb.googlegroups.com>
References: <1164223072.219676.157790@j44g2000cwa.googlegroups.com>
	<mailman.608.1164225033.32031.python-list@python.org>
	<1164283023.996975.292750@f16g2000cwb.googlegroups.com>
Message-ID: <1164295848.442041.89560@k70g2000cwa.googlegroups.com>

Heya there,

Ok, found the solution. I just needed to use leaveWhiteSpace() in the
places I want pyparsing to take into consideration the spaces.
Thx for the help.

Cheers!

Hugo Ferreira

On Nov 23, 11:57 am, "Bytter" <byt... at gmail.com> wrote:
> (This message has already been sent to the mailing-list, but I don't
> have sure this is arriving well since it doesn't come up in the usenet,
> so I'm posting it through here now.)
>
> Chris,
>
> Thanks for your quick answer. That changes a lot of stuff, and now I'm
> able to do my parsing as I intended to.
>
> Still, there's a remaining problem. By using Combine(), everything is
> interpreted as a single token. Though what I need is that
> 'include_bool' and 'literal' be parsed as separated tokens, though
> without a space in the middle...
>
> Paul,
>
> Thanks for your detailed explanation. One of the things I think is
> missing from the documentation (or that I couldn't find easy) is the
> kind of explanation you give about 'The Way of PyParsing'. For example,
> It took me a while to understand that I could easily implement simple
> recursions using OneOrMany(Group()). Or maybe things were out there and
> I didn't searched enough...
>
> Still, fwiw, congratulations for the library. PyParsing allowed me to
> do in just a couple of hours, including learning about it's API (minus
> this little inconvenient) what would have taken me a couple of days
> with, for example,  ANTLR (in fact, I've already put aside ANTLR more
> than once in the past for a built-from-scratch parser).
>
> Cheers,
>
> Hugo Ferreira
>
> On Nov 22, 7:50 pm, Chris Lambacher <c... at kateandchris.net> wrote:
>
> > On Wed, Nov 22, 2006 at 11:17:52AM -0800, Bytter wrote:
> > > Hi,
>
> > > I'm trying to construct a parser, but I'm stuck with some basic
> > > stuff... For example, I want to match the following:
>
> > > letter = "A"..."Z" | "a"..."z"
> > > literal = letter+
> > > include_bool := "+" | "-"
> > > term = [include_bool] literal
>
> > > So I defined this as:
>
> > > literal = Word(alphas)
> > > include_bool = Optional(oneOf("+ -"))
> > > term = include_bool + literal+ here means that you allow a space.  You need to explicitly override this.
> > Try:
>
> > term = Combine(include_bool + literal)
>
> > > The problem is that:
>
> > > term.parseString("+a") -> (['+', 'a'], {}) # OK
> > > term.parseString("+ a") -> (['+', 'a'], {}) # KO. It shouldn't
> > > recognize any token since I didn't said the SPACE was allowed between
> > > include_bool and literal.
>
> > > Can anyone give me an hand here?
>
> > > Cheers!
>
> > > Hugo Ferreira
>
> > > BTW, the following is the complete grammar I'm trying to implement with
> > > pyparsing:
>
> > > ## L ::= expr | expr L
> > > ## expr ::= term | binary_expr
> > > ## binary_expr ::= term " " binary_op " " term
> > > ## binary_op ::= "*" | "OR" | "AND"
> > > ## include_bool ::= "+" | "-"
> > > ## term ::= ([include_bool] [modifier ":"] (literal | range)) | ("~"
> > > literal)
> > > ## modifier ::= (letter | "_")+
> > > ## literal ::= word | quoted_words
> > > ## quoted_words ::= '"' word (" " word)* '"'
> > > ## word ::= (letter | digit | "_")+
> > > ## number ::= digit+
> > > ## range ::= number (".." | "...") number
> > > ## letter ::= "A"..."Z" | "a"..."z"
> > > ## digit ::= "0"..."9"
>
> > > And this is where I got so far:
>
> > > word = Word(nums + alphas + "_")
> > > binary_op = oneOf("* and or", caseless=True).setResultsName("operator")
> > > include_bool = oneOf("+ -")
> > > literal = (word | quotedString).setResultsName("literal")
> > > modifier = Word(alphas + "_")
> > > rng = Word(nums) + (Literal("..") | Literal("...")) + Word(nums)
> > > term = ((Optional(include_bool) + Optional(modifier + ":") + (literal |
> > > rng)) | ("~" + literal)).setResultsName("Term")
> > > binary_expr = (term + binary_op + term).setResultsName("binary")
> > > expr = (binary_expr | term).setResultsName("Expr")
> > > L = OneOrMore(expr)
>
> > > --
> > > GPG Fingerprint: B0D7 1249 447D F5BB 22C5  5B9B 078C 2615 504B 7B85
> 
> > > --
> > >http://mail.python.org/mailman/listinfo/python-list



From garylinux at gmail.com  Wed Nov 22 20:09:27 2006
From: garylinux at gmail.com (garylinux at gmail.com)
Date: 22 Nov 2006 17:09:27 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164156093.359433.315790@e3g2000cwe.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
Message-ID: <1164244166.988532.261370@l39g2000cwd.googlegroups.com>

Tell us about it again when it is available as html. We will be glad to
read it. I am sorry but I almost never find a pdf worth the bother of
clicking on it.
Sorry



From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 25 18:16:02 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Nov 2006 10:16:02 +1100
Subject: a -very- case sensitive search
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
Message-ID: <pan.2006.11.25.23.16.02.49327@REMOVE.THIS.cybersource.com.au>

On Sat, 25 Nov 2006 13:39:55 -0800, Ola K wrote:

> Hi,
> I am pretty new to Python and I want to make a script that will search
> for the following options:
> 1) words made of uppercase characters -only- (like "YES")
> 2) words made of lowercase character -only- (like "yes")
> 3) and words with only the first letter capitalized (like "Yes")
> * and I need to do all these considering the fact that not all letters
> are indeed English letters.
> 
> I went through different documention section but couldn't find a right
> condition, function or method for it.

At the command prompt:


>>> dir('')
# result edited for clarity
[ ... 'isalnum', 'isalpha', 'isdigit', 'islower',
'isspace', 'istitle', 'isupper',  ... ]

Then do this:

>>> help(''.islower)

and read the text it provides. Then experiment on the command line:

>>> 'abcd1234'.islower()
True
>>> 'aBcd1234'.islower()
False

Then come back to us if they aren't suitable, and tell us WHY they aren't
suitable.


-- 
Steven.



From pavlovevidence at gmail.com  Thu Nov 30 09:25:40 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 30 Nov 2006 06:25:40 -0800
Subject: More elegant to get a name: o.__class__.__name__
In-Reply-To: <z7mdnTF4I_wfefPYnZ2dnUVZ_rCdnZ2d@comcast.com>
References: <z7mdnTF4I_wfefPYnZ2dnUVZ_rCdnZ2d@comcast.com>
Message-ID: <1164896740.696013.5390@j72g2000cwa.googlegroups.com>


alf wrote:
> Hi,
> is there a more elegant way to get o.__class__.__name__. For instance I
> would imagine name(o).

def name_of_type(o):
    return o.__class__.__name__

name_of_type(o)


Carl Banks

P.S. name(o) suggests it's the name of the object, not the type
P.P.S. you could use type(o).__name__ but it doesn't work for old-style
classes



From sylvain.thenault at logilab.fr  Thu Nov 23 10:45:35 2006
From: sylvain.thenault at logilab.fr (Sylvain =?iso-8859-1?Q?Th=E9nault?=)
Date: Thu, 23 Nov 2006 16:45:35 +0100
Subject: [ANN] pylint 0.12.2 / astng 0.16.3
Message-ID: <20061123154535.GB21319@crater.logilab.fr>

Hi there !

I'm pleased to announce new bugs fix releases of pylint and astng. Most
bug discussed more or less recently on the python-projects mailing list
should be fixed by those releases, and astng inference capability has
been enhanced for some construction, so upgrade is recommended.

Visit the respective projects'page of our fresh new .org site to get the
latest source distribution :o)
http://www.logilab.org/project/name/pylint
http://www.logilab.org/project/name/logilab-astng

Enjoy !
-- 
Sylvain Th?nault                               LOGILAB, Paris (France)
Formations Python, Zope, Plone, Debian:  http://www.logilab.fr/formations
D?veloppement logiciel sur mesure:       http://www.logilab.fr/services
Python et calcul scientifique:           http://www.logilab.fr/science



From dlenski at gmail.com  Mon Nov 13 17:33:10 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 13 Nov 2006 14:33:10 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.92.1163449609.32031.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>
	<mailman.1984.1163090531.11739.python-list@python.org>
	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
	<4558b437$0$32430$c3e8da3@news.astraweb.com>
	<mailman.92.1163449609.32031.python-list@python.org>
Message-ID: <1163457190.758583.76570@h48g2000cwc.googlegroups.com>

Ben Finney wrote:
> Readability doesn't vary directly or inversely with the number of
> characters, even though it is affected when they change.

Good point!  Perl has more characters than Python, and I find they make
it harder to read because they are distracting.

Brainf*** (http://en.wikipedia.org/wiki/Brainf***) only has 8 possible
characters, and it's hard to read because you can't easily recognize
repeating patterns or features.

I think this is something that typographers have been studying for
hundreds of years, how changing the shape of characters, page layout,
and typographical conventions affect the ability to easily read and
comprehend text.  I know that in college I hated one physics textbook
which used monospaced fonts... it was well-written but just hurt my
eyes to browse through.

Dan



From scott.daniels at acm.org  Sat Nov 25 21:03:37 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 25 Nov 2006 18:03:37 -0800
Subject: Local variables persist in functions?
In-Reply-To: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
References: <1164355869.607182.278200@l12g2000cwl.googlegroups.com>
Message-ID: <4568ec90$1@nntp0.pdx.net>

120psi at gmail.com wrote:
> I'm a bit baffled.  Here is a bit of fairly straightforward code:
> 
> def _chunkify( l, chunkSize, _curList = list() ): ... 
> _chunkify simply breaks a sequence into a sequence of smaller lists of
> size <= chunkSize.  The first call works fine, but if I call it
> multiple times, weirdness happens.
> 
> Considering the default value of _curList, these statements should be
> identical.  Any pointers?  Did I miss something in the python reference
> manual?  (running 2.4.3, fyi)

You've already got the real answer.  How about considering iterators,
since I presume you are chunking to help some kind of processing.:

     def chunky(src, size):
         '''Produce a (possibly long source) in size-chunks or less.'''
         assert size > 0
         for start in range(0, len(src), size):
             yield src[start : start + size]

     def chunkify(alist, size, _curList=None):
         if _curList is None:
             return list(chunky(alist, size))
         _curList.extend(list(chunky(alist, size)))
         return _curList

I suspect most often you can use chunky directly:
     for chunk in chunky(somedata, size):
         ...

     for size in range(1, 30):
         print size, list(chunky('abcdefghijklmnopqrstuvwxyz', size))


--Scott David Daniels
scott.daniels at acm.org


From bearophileHUGS at lycos.com  Wed Nov 22 19:45:38 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 16:45:38 -0800
Subject: Abelson and Python
In-Reply-To: <1164242138.749183.144160@k70g2000cwa.googlegroups.com>
References: <1164239517.067445.179320@e3g2000cwe.googlegroups.com>
	<1164240649.628193.65300@f16g2000cwb.googlegroups.com>
	<1164241247.453138.296580@m73g2000cwd.googlegroups.com>
	<1164242138.749183.144160@k70g2000cwa.googlegroups.com>
Message-ID: <1164242738.395574.94350@h54g2000cwb.googlegroups.com>

mensanator at aol.com:
> Haven't heard of that one, although I've got DrScheme.

Right, sorry, I meant that one :-)


> I find that hierarchy extremely annoying. I don't see the need for it.
> I never use OOP in Python yet there's no need for me to have a
> stripped down version, I just don't use it.

But Python too contains some things that can bite a newbie of the
language. (BTW, in some situations I too have had to access to the full
Scheme language, so you may be partially right).


> But those are implementation details, which you can't avoid.
> A bad implementation spoils a language even if the language itself
> is fabulous.

And a good implementation like DrScheme makes the Scheme language
usable too :-)

Bye,
bearophile



From jordan.taylor2 at gmail.com  Tue Nov 14 14:20:54 2006
From: jordan.taylor2 at gmail.com (Jordan)
Date: 14 Nov 2006 11:20:54 -0800
Subject: Python development time is faster.
In-Reply-To: <mailman.119.1163491857.32031.python-list@python.org>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<mailman.119.1163491857.32031.python-list@python.org>
Message-ID: <1163532054.236735.326240@h48g2000cwc.googlegroups.com>

Just a little something I realized after writing the same program in
C++ and python (a simple chat client and server, with one on one and
chat room capabilities).  I used wxwidgets and wxpython respectively
for the GUIs, and they weren't extremely elaborate, just some basic
functionality, a few frames, a few buttons, added a few sound
options... nothing huge ;D   However, making the gui for python took me
less than a fourth of the time it took to make the equivalent (the C++
one was actually a bit worse, there were some things that were
implemented in wxpython that just didn't want to work in wxwidgets).
I'm not saying that coding in python is going to let you develop things
4 times faster, but there are some obvious advantages that I think
greatly increase development rate. Just making the framework for the
C++ gui was very time consuming.  Added to this is that python doesn't
require linking and specifying libraries and all the other things that
tend to go wrong on the first attempt at compiling something. You also
don't have to specify void, int, char etc for functions, and of course,
there's no pointers.  :D     Best thing you can do is probably just to
download python and tinker with it, maybe try making some python
equivalents to whatever you've made in other languages.

Cheers
-Jordan

Hendrik van Rooyen wrote:
> "Chris Brat" <chrisBrat at gmail.com> wrote:
>
>
> > I've seen a few posts, columns and articles which state that one of the
> > advantages of Python is that code can be developed x times faster than
> > languages such as <<Insert popular language name here>>.
> >
> > Does anyone have any comments on that statement from personal
> > experience?
> > How is this comparison measured?
>
> I don't think it can be, objectively - comparing two teams,  one using language
> "a", and the other python, to do  a task, is simply comparing the skill levels
> of the two teams - and using the same team to do the same task in two different
> languages is also misleading, because of the experience gained in the first
> iteration.
>
> Python is actually astonishing - it seems to "fit the brain" of a large number
> of people - it is very easy to get started with, and is rich enough to keep
> surprising you - even after considerable time hacking around with it.
> It can do OO, but you can also write procedures in it, and you can even mix the
> two in the same module, and most of the time it "just works" - and when it
> doesn't, it is normally very easy to teach yourself what you are doing wrong by
> playing at the interactive interpreter prompt.  This makes for productivity, as
> you can write quite complex things in a day or so, from scratch, such as:
>
> A single pass "assembler" for a virtual machine with 33 instructions - from
> nothing to running, fully debugged, in two days.
>
> A simple sliding window protocol - coded up from nothing in four days - mostly
> spent staring into space, imagining problems, instead of coding... so the
> "design" time is included... but its not working yet, as I have to write the
> other side in assembler on a very small machine, which would normally have taken
> me almost a month, but that will now probably take about two weeks, as I have
> the Python code to translate...
>
> And I am not a guru on this group, and I have just idly mucked around with
> Python for about a year in real time, not doing it full time, or making any real
> effort to study the language formally beyond lurking here - there are other
> people here on this group who, I am sure, could beat the hell out of these
> times, both for the design and the coding.
>
> So to sum up my personal perspective - it is very worth while to know a little
> python, even if you just use it as a prototyping language - it gets you going
> rapidly...
> 
> - Hendrik



From sjmachin at lexicon.net  Mon Nov 20 05:23:38 2006
From: sjmachin at lexicon.net (John Machin)
Date: 20 Nov 2006 02:23:38 -0800
Subject: fileinput.input('test.txt') => ERROR: input() already active
In-Reply-To: <1164016727.678036.225640@e3g2000cwe.googlegroups.com>
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>
	<ejrqnb$5o3$02$1@news.t-online.com>
	<1164016727.678036.225640@e3g2000cwe.googlegroups.com>
Message-ID: <1164018218.422003.286870@h54g2000cwb.googlegroups.com>

cyberco wrote:
> Ah, thanks!
> Another related question I have: The following piece edits in place,
> but ads whitelines between all lines of a Windows text file. Why?
>
> ===========================
> fi = fileinput.input('test.txt', inplace=1)
> for l in fi:

Please don't use lowercase "L" as a variable name; it is too easily
confused with the digit 1 in some fonts. Use meaningful names.
>     print l.replace('a', 'b')
> ===========================
fi = fileinput.input('test.txt', inplace=1)
for line in fi:
    print line.replace('a', 'b')

It's nothing to do with whether the file is a "Windows text file" or
not. The reason is that line already has a "\n" i.e. newline character
at the end. The print statement adds another.
Either:
(1) change
    print blahblah
to
    print blahblah, # comma suppresses the added newline
or
(2) put
    import sys
up the front and change
    print blahblah
to 
    sys.stdout.write(blahblah)

HTH,
John



From fredrik at pythonware.com  Wed Nov  1 08:31:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 01 Nov 2006 14:31:51 +0100
Subject: Why can't you assign to a list in a loop without enumerate?
In-Reply-To: <4qrln8Fo2ollU1@individual.net>
References: <1162320362.257426.121370@e3g2000cwe.googlegroups.com>	<mailman.1563.1162321248.11739.python-list@python.org>
	<4qrln8Fo2ollU1@individual.net>
Message-ID: <eia7k7$7nl$1@sea.gmane.org>

Bjoern Schliessmann wrote:

>> what's wrong with using enumerate?  or a list comprehension?  or
>> some other of the many different ways you can use to build a list
>> from a set of values?
> 
> Shouldn't there be one -- and preferably only one -- obvious way to
> do it? 8)
 >
> Python Cookbook says "enumerate()", is this still correct with 2.5?

define "it".

</F>



From hg at nospam.com  Thu Nov 23 10:30:53 2006
From: hg at nospam.com (hg)
Date: Thu, 23 Nov 2006 09:30:53 -0600
Subject: Simple threading
In-Reply-To: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
Message-ID: <4565BEAD.7080206@nospam.com>

jrpfinch wrote:
> I'm just getting started on threading and was wondering why the
> following code does not work (i know globals is bad style - I'll
> eliminate them eventually).  All I get is a blank cursor flashing.
> 
> Many thanks
> 
> Jon
> 
> import threading
> import sys
> import time
> global g_datum
> global g_rawfile
> global g_rawtext
> global g_overs
> global g_currentover
> global g_secondspertick
> 
> 
> g_secondspertick=5
> g_datum=time.time()
> g_currenttick=1
> g_rawfile=open('inputashes.txt','r')
> g_rawtext=g_rawfile.read()
> g_overs=g_rawtext.split('<P>')
> g_currentover=0
> 
> 
> class ImapThread(threading.Thread):
>     def run(self):
>         global g_currenttick
>         if time.time() > (g_datum + (g_secondspertick *
> g_currenttick)):
>             print "Ticked %s" % g_currenttick
>             g_currenttick=g_currenttick+1
>             print g_currenttick
>             sys.stdout.flush()
>     time.sleep(0.01)
> 
> def main():
>     ImapThread().start()
>     while 1:
>         pass
> 
> if __name__ == "__main__":
>     main()
> 
Run gets called only once: you need to put your logic in a "while True"
or something equivalent/define some escape clause.

Right now you just get into the implicit "else" and get out.

hg

import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick


g_secondspertick=5
g_datum=time.time()
g_currenttick=1
#g_rawfile=open('inputashes.txt','r')
#g_rawtext=g_rawfile.read()
#g_overs=g_rawtext.split('<P>')
g_currentover=0


class ImapThread(threading.Thread):
    def run(self):
        while True:
            global g_currenttick
            if time.time() > (g_datum + (g_secondspertick *
g_currenttick)):
                print "Ticked %s" % g_currenttick
                g_currenttick=g_currenttick+1
                print g_currenttick
                sys.stdout.flush()
            else:
                print 'HERE'
        time.sleep(0.01)

def main():
    ImapThread().start()
    while 1:
        pass

if __name__ == "__main__":
    main()



From martin at v.loewis.de  Sun Nov 26 04:09:34 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 26 Nov 2006 10:09:34 +0100
Subject: who is maintainer of xml-rpc module?
In-Reply-To: <Rk8ah.15023$Sw1.14@newssvr13.news.prodigy.com>
References: <Rk8ah.15023$Sw1.14@newssvr13.news.prodigy.com>
Message-ID: <456959CE.3000206@v.loewis.de>

Mark Harrison schrieb:
> So, I've made a couple of small but useful additions to
> the xml-rpc package.  Is there an assigned maintainer
> of the package I should communicate with?

The author of the module is Fredrik Lundh; you can try to
contact him. If you want to contribute your changes to
the Python project, you should follow the procedure at

http://www.python.org/dev/patches/

Consider filling out a contribution form also in this
case:

http://www.python.org/psf/contrib/

> I'd like to get these into wider circulation if possible...
> what's the best way to do this?

Depends on how the source is structured. If it is a separate
set of modules, you should package them as a distutils package,
and upload them to the cheeseshop (cheeseshop.python.org).
If they are just patches to the existing modules, you can still
upload them to the cheeseshop.

In either case, you can then send an announcement to
comp.lang.python.announce that you made them available.

Regards,
Martin


From mgiann at beta-cae.gr  Sun Nov 26 11:04:54 2006
From: mgiann at beta-cae.gr (Michalis Giannakidis)
Date: Sun, 26 Nov 2006 18:04:54 +0200
Subject: Inheritance from builtin list and override of methods.
Message-ID: <200611261804.54669.mgiann@beta-cae.gr>

Dear all

I tried to override methods of build in Python types, so as to change their 
behavior.
I tried to override list.__getitem__ list.__setitem__ and some others alike
The test case is:

#!/usr/bin/env python
class L(list):
        def __getitem__(self, i):
                print 'G', i
                return list.__getitem__(self, i)
        def __setitem__(self, i, y):
                print 'S:', i, y
                return list.__setitem__(self, i, y)
        def __setslice__(self, i, j, y):
                print 'SL:', i, j, y
                return list.__setslice__(self, i, j, y)
        def __iter__(self, x):
                print 'iter:', x
                return list.__iter__(self, x)

l = L()
l.append(3) # this does not call my __setitem__
l.append(2)
l.append(1)
l[2] = 6 # this calls my __setitem__
l.sort(key=lambda x: x )
print l

I expected that the call to l.sort() would call my versions of the list 
methods (iter, setitem etc ) but it didn't. Also the call to l.append didn't 
call my setitem but the assignment l[2] = 6 did! I expected my versions of 
iter, setitem, getitem to be called with the typical impementation of sorting 
from C in mind. 

Could someone please explain the reasoning/behabiour of these?

Python Version:
Python 2.4.2 (#1, May 26 2006, 14:35:35) 
[GCC 3.3.6 (Gentoo 3.3.6, ssp-3.3.6-1.0, pie-8.7.8)] on linux2

Thank you very much in advance.

Michalis

-- 
Michalis Giannakidis


From goofy666 at scarlet.be  Sat Nov 25 17:01:54 2006
From: goofy666 at scarlet.be (Goofy666)
Date: Sat, 25 Nov 2006 23:01:54 +0100
Subject: a -very- case sensitive search
In-Reply-To: <1164490795.866046.133230@45g2000cws.googlegroups.com>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
Message-ID: <QMidneJeC7fWIPXYnZ2dnUVZ8sqdnZ2d@scarlet.biz>

Hi

 > * and I need to do all these considering the fact that not all letters
 > are indeed English letters.

You mean letters from the English alphabet (derived from the Latin/Roman 
alphabet, fyi)? I'm sorry for the nitpicking, but 'English letters' 
sounds a bit too 'ackward' to me.

 > I went through different documention section but couldn't find a right
 > condition, function or method for it.
 > Suggestions will be very much appriciated...

I'm still (trying to) learn(ing) it myself, but you can try looking into 
using regular expressions. There's a standard module for it (re), see 
the PyLib Reference for details; http://docs.python.org/lib/module-re.html.

--Laurens

Ola K wrote:
> Hi,
> I am pretty new to Python and I want to make a script that will search
> for the following options:
> 1) words made of uppercase characters -only- (like "YES")
> 2) words made of lowercase character -only- (like "yes")
> 3) and words with only the first letter capitalized (like "Yes")
> * and I need to do all these considering the fact that not all letters
> are indeed English letters.
> 
> I went through different documention section but couldn't find a right
> condition, function or method for it.
> Suggestions will be very much appriciated...
> --Ola
> 


From matthew at agrip.org.uk  Sun Nov 26 06:32:04 2006
From: matthew at agrip.org.uk (Matthew Tylee Atkinson)
Date: Sun, 26 Nov 2006 11:32:04 +0000 (UTC)
Subject: Oops!
Message-ID: <ekbtvk$753$2@news.freedom2surf.net>

Apologies for any repeated posts, my 'net connection died unexpectedly!

-- 
Matthew Tylee Atkinson <matthew at agrip.org.uk>


From vincent.arnoux at rfo.atmel.com  Wed Nov 29 11:23:48 2006
From: vincent.arnoux at rfo.atmel.com (Vincent Arnoux)
Date: Wed, 29 Nov 2006 17:23:48 +0100
Subject: Reading GDSII layouts
In-Reply-To: <1164732963.158392.35670@14g2000cws.googlegroups.com>
References: <mailman.796.1164712312.32031.python-list@python.org>
	<1164732963.158392.35670@14g2000cws.googlegroups.com>
Message-ID: <200611291723.49468.vincent.arnoux@rfo.atmel.com>

Le mardi 28 novembre 2006 17:56, Paddy a ?crit?:
>> The link you gave states this near the top:
>   IPKISS is a python-based library for the generation of GDSII layouts,
> including hierarchy.
>   It has grown out of the GDS_KEY library, but it is more flexible and
> object oriented. Contrary
>   to GDS_KEY,  **it can read and edit existing GDSII files**.
>
> And at the bottom of the page:
>   * Import of existing GDSII files into a layout (import.py)
>
> It looks to be a reader?!
>
> - Paddy.

Yes, you are right, but I am actually looking for a library that would display 
only cell references, and not load the entire design (what will be too time 
consuning with Python). And this doesn't look to be present in IPKiss.

Vincent




From tuglyraisin at aol.com  Wed Nov 15 11:22:02 2006
From: tuglyraisin at aol.com (Andrew Burton)
Date: Wed, 15 Nov 2006 10:22:02 -0600
Subject: Python-2.5.exe?
Message-ID: <v8H6h.15$895.11@newsfe04.lga>

What Python is best for installing to a USB Drive?  I've actually got 
2.5 on a drive, but I forget which installation package I used.  It 
seems to me that it was an EXE file, but I cannot seem to find one of 
those today.

Can the Python-2.5.msi installation files from python.org be installed 
so as not to touch the registry, to make them portable?

-- 
Andrew Burton
tuglyraisin at aol.com
http://utilitarian.us - A Guide to Esoteric Technology in Paragon City
http://jarodrussell.livejournal.com/ - Take a guess. ;)


From cginboston at hotmail.com  Tue Nov  7 16:25:36 2006
From: cginboston at hotmail.com (Chaz Ginger)
Date: Tue, 07 Nov 2006 21:25:36 GMT
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <v_WdnZltc-QUa83YnZ2dnUVZ_tednZ2d@comcast.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<v_WdnZltc-QUa83YnZ2dnUVZ_tednZ2d@comcast.com>
Message-ID: <4550FA2E.1070404@hotmail.com>

Joe Seigh wrote:
> Martin v. L?wis wrote:
>> You still didn't say what you would suggest to make it thread-safe
>> again; most likely, you proposal would be to add locking. If I
>> understand Joe's approach correctly, he has a solution that does
>> not involve locking (although I don't understand how it works).
>>
> Sun had applied for a patent on it.  You can go to the
> uspto search page here http://www.uspto.gov/patft/index.html
> and look for
> 
> 20060218561 Code preparation technique employing lock-free pointer
> operations
> 20060037026 Lightweight reference counting using single-target
> synchronization
> 
> Click on the images link on the patent application where the illustrations
> are which show the concepts probably better than the text.
> 
> The first one above is actually a continuation patent on three different
> techniques.  One using double wide compare and swap, one using ROP (Repeat
> Offender Problem), a form of PDR, and one using DCAS (compare and swap
> of two separate locations) which only exists on MC68020 and MC68030
> processors.
> 
Check out the work in the '80s from the NYU Ultra project. They did a
great deal of work on using atomic incr/decr for all sorts of algorithms
 to get around locking on parallel processors.

Chaz.


From robert.kern at gmail.com  Fri Nov 17 13:42:11 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 12:42:11 -0600
Subject: What python modules are available?
In-Reply-To: <1163767023.599564.260920@m7g2000cwm.googlegroups.com>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>	<mailman.334.1163766357.32031.python-list@python.org>
	<1163767023.599564.260920@m7g2000cwm.googlegroups.com>
Message-ID: <ejkvqh$d4i$2@sea.gmane.org>

Why Tea wrote:
> All I need is something to provide me with array features. I can't
> remember why I chose to use numarray a while ago...

You will probably want numpy these days. numarray is being phased out.

  http://numpy.scipy.org/

-- 
Robert Kern

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



From daigno at gmail.com  Tue Nov 28 20:39:03 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Tue, 28 Nov 2006 20:39:03 -0500
Subject: why would anyone use python when java is there?
Message-ID: <456CE4B7.6050402@gmail.com>

 > wtf

a reasonable question...

But before I run circle yelling "the trolls are here, the trolls are 
here"  I got one for you...

why would anyone use java when python is there??

;-)

.^_^.

Eric :D,



From python-url at phaseit.net  Mon Nov 13 10:46:52 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 13 Nov 2006 15:46:52 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov 13)
Message-ID: <eja41c$4pa$1@lairds.us>

QOTW:  "It is humbling to see how simple yet powerfull python`s view on
things is...." - ??ric Daigneault 
    http://groups.google.com/group/comp.lang.python/msg/bbd842715bb5b6eb

"[I]f a machine is expected to be infallible, it cannot also be
intelligent." - Alan Turing, 20 February 1947, lecture to London
Mathematical Socity on ACE <URL: http://en.wikipedia.org/wiki/ACE_(computer) >


    Stefan Schukat illustrates an instructive use of COM in a multi-threaded
    context which manages a MATLAB instance:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/c13315f002ab025/

    Someone should capture the scattered but valuable observations of this
    report on Windows-hosted extending into a more enduring document:
	http://groups.google.com/group/comp.lang.python/browse_frm/thread/36c13e238e6e3bb4

    Paul Boddie provides references on concurrency in Python:
	http://groups.google.com/group/comp.lang.python/msg/4a507814e704b782

    Microsoft publicizes IronPython's ASP.Net capabilities:
	http://www.infoworld.com/archives/emailPrint.jsp?R=printThis&A=/article/06/11/07/HNvsiron_1.html
	http://www.eweek.com/article2/0,1895,2053498,00.asp?kc=EWWHNEMNL110906EOAD
    The latest release of eric3 supports QScintilla autocompletion,
    and more:
        http://www.die-offenbachs.de/detlev/eric.html

    Is a "parameter-holding class" reasonable?  Probably so, at
    least on occasion:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/64d84ae1de8bd74/

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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From hg at nospam.com  Fri Nov 24 16:32:11 2006
From: hg at nospam.com (hg)
Date: Fri, 24 Nov 2006 15:32:11 -0600
Subject: Active State and Komodo...
In-Reply-To: <1164401579.895042.47000@l39g2000cwd.googlegroups.com>
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
	<1164401579.895042.47000@l39g2000cwd.googlegroups.com>
Message-ID: <qCJ9h.13403$pM.3994@newsfe13.lga>

John Machin wrote:
> Steve Thompson wrote:
>> Hello all,
>>
>> I was wondering the differnced there were betwee Active State's python and
>> the open source version of python. Would I have to unistall my opend souce
>> python? Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
>> unler SuSE Linux v. 10.i?
>>
>> Addionally, is the eric IDE (version 3) an acceptible IDE or are there
>> more easy and more productive IDE's for perl?
>>
>> I'm urining Gnome v. 12.2.2 and Eric v 3.8.1
> 
> I'm not sure which to recommend: a spelling checker or a catheter :-)
> 

You _are_ bad !



From mike.klaas at gmail.com  Wed Nov 29 00:56:40 2006
From: mike.klaas at gmail.com (Klaas)
Date: 28 Nov 2006 21:56:40 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <1164750155.735437.37680@n67g2000cwd.googlegroups.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
	<mailman.801.1164715357.32031.python-list@python.org>
	<1164739788.335821.239100@n67g2000cwd.googlegroups.com>
	<1164741116.583861.278220@l12g2000cwl.googlegroups.com>
	<1164750155.735437.37680@n67g2000cwd.googlegroups.com>
Message-ID: <1164779800.685756.66420@l39g2000cwd.googlegroups.com>


Klaas wrote:
> Klaas wrote:
>
> > In fact, you can make it about 4x faster by balancing:
> >
> > [klaas at worbo ~]$ python -m timeit -s "from array import array"
> > "array('c','\0'*200)*500"
> > 10000 loops, best of 3: 32.4 usec per loop
>
> This is an unclean minimally-tested patch which achieves reasonable
> performance (about 10x faster than unpatched python):

<snip>

Never mind, that patch is bogus.  A updated patch is here:
http://sourceforge.net/tracker/index.php?func=detail&aid=1605020&group_id=5470&atid=305470

-Mike



From walterbyrd at iname.com  Thu Nov 16 12:46:05 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 16 Nov 2006 09:46:05 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <2006111607574875249-jameshcunningham@gmailcom>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<1163605059.270769.293290@m73g2000cwd.googlegroups.com>
	<455baf21$0$28561$426a74cc@news.free.fr>
	<1163642366.698784.130390@i42g2000cwa.googlegroups.com>
	<2006111523045616807-jameshcunningham@gmailcom>
	<mailman.243.1163673962.32031.python-list@python.org>
	<2006111607574875249-jameshcunningham@gmailcom>
Message-ID: <1163699165.847310.285630@e3g2000cwe.googlegroups.com>


James Cunningham wrote:

> Nope. It disproves your assertion that "certainly all of the lower
> priced hosters" use Apache 1.3.

Okay, where can I get Python and Apache 2.X for $10 a year?



From carsten at uniqsys.com  Fri Nov 17 11:03:22 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Nov 2006 11:03:22 -0500
Subject: String Replace only if whole word?
In-Reply-To: <005401c70a5f$156e9cd0$0d7d12ac@kearfott.com>
References: <005401c70a5f$156e9cd0$0d7d12ac@kearfott.com>
Message-ID: <1163779402.3358.9.camel@dot.uniqsys.com>

On Fri, 2006-11-17 at 10:43 -0500, Michael Yanowitz wrote:
> >Your pattern would be "[^A-Za-z0-9_]word[^A-Za-z0-9_]"
> >
> >--
> >Juho Schultz
> 
> 
> Thanks.
>   This works great except for one thing:
> 
> The character after the replacement is deleted, so that if I have
>      send_data (LAPTOP, test_string)
>     it would replace it with:
>      send_data (10.1.3.4 test_string)
>   (ignoring that the 10.1.3.4 is not quoted). The comma is missing.

If you actually wanted to use string replacement, you'd need a pattern
with look-behind and look-ahead assertions along the lines of
"(?<![A-Za-z0-9_])word(?![A-Za-z0-9_])".

Then again, I don't think string replacement is the right tool for the
job. You're saying that the file you are operating on in this fashion is
a Python script. Why don't you just place something like
LAPTOP="10.1.3.4" at the top of that file, or have the script read this
information from a configuration file?

-Carsten




From cyberco at gmail.com  Sun Nov 19 07:23:58 2006
From: cyberco at gmail.com (cyberco)
Date: 19 Nov 2006 04:23:58 -0800
Subject: ElementTree: namespace declaration in each element?
Message-ID: <1163939038.754792.48730@e3g2000cwe.googlegroups.com>

The (excellent) ElementLibrary ads namespaces to each element when
writing the tree back to a file.
Say I do:

tree = ET.parse('playlist.xml')
<snip: adding/removing elements>
tree.write(outFile)

with the following XML:

=============
<playlist version="1" xmlns="http://xspf.org/ns/0/">
    <trackList>
        <track>
            <title>Kick off!</title>
        </track>
    </trackList>
</playlist>
=============

Writing the tree out after adding/removing elements results in:

=============
<ns0:playlist version="1" xmlns:ns0="http://xspf.org/ns/0/">
    <ns0:trackList>
        <ns0:track
            <ns0:title>Kick off!</ns0:title>
        </ns0:track>
    </ns0:trackList>
</ns0:playlist>

=============

Unfortunately the client that needs to consume this XML can't handle
the 'ns0:' part of each tag. Is there a way to output XML similar to
the input?



From mail at microcorp.co.za  Mon Nov 20 00:20:13 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 07:20:13 +0200
Subject: [ANN] rpncalc-2.5  RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com>
Message-ID: <01bf01c70c6b$bec405a0$03000080@hendrik>

"Raymond L. Buvel" <levub137 at wi.rr.com> wrote:


> The rpncalc package adds an interactive Reverse Polish Notation (RPN)

Can anyone remember who the Pole was and how his name is spelled? 

(no fair googling)

- Hendrik



From jm.suresh at gmail.com  Tue Nov 28 07:02:23 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 28 Nov 2006 04:02:23 -0800
Subject: Modifying every alternate element of a sequence
In-Reply-To: <1164713164.043283.161370@l39g2000cwd.googlegroups.com>
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
	<1164713164.043283.161370@l39g2000cwd.googlegroups.com>
Message-ID: <1164715343.290824.239550@14g2000cws.googlegroups.com>

Wow, I was in fact searching for this syntax in the python tutorial. It
is missing there.
 Is there a reference page which documents all possible list
comprehensions.
--
Suresh
Leo Kislov wrote:
> jm.suresh at no.spam.gmail.com wrote:
> > I have a list of numbers and I want to build another list with every
> > second element multiplied by -1.
> >
> > input = [1,2,3,4,5,6]
> > wanted = [1,-2,3,-4,5,-6]
> >
> > I can implement it like this:
> >
> > input = range(3,12)
> > wanted = []
> > for (i,v) in enumerate(input):
> >     if i%2 == 0:
> >         wanted.append(v)
> >     else:
> >         wanted.append(-v)
> >
> > But is there any other better way to do this.
>
> Use slices:
>
> input[1::2] = [-item for item in input[1::2]]
>
> If you don't want to do it in-place, just make a copy:
>
> wanted = input[:]
> wanted[1::2] = [-item for item in wanted[1::2]]
> 
>   -- Leo



From bignose+hates-spam at benfinney.id.au  Thu Nov 23 20:04:31 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 24 Nov 2006 12:04:31 +1100
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
Message-ID: <87zmahu02o.fsf@benfinney.id.au>

"tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:

> Yes, it's true that you can't resell copies of The Python Papers for
> personal profits, but you may derive from it, reproduce and
> propagate it. You're quite right to point it out.

Then please revise the false statement that the publication is "free
as in beer and freedom", or make it true by releasing the documents
under a license that does grant conventional free-software freedoms.

-- 
 \       "They can not take away our self respect if we do not give it |
  `\                                      to them."  -- Mahatma Gandhi |
_o__)                                                                  |
Ben Finney



From steven.bethard at gmail.com  Wed Nov 22 17:45:21 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 22 Nov 2006 15:45:21 -0700
Subject: Global object
In-Reply-To: <1164233669.952808.148210@j44g2000cwa.googlegroups.com>
References: <1164233669.952808.148210@j44g2000cwa.googlegroups.com>
Message-ID: <naOdnTr5sOOcTvnYnZ2dnUVZ_s-dnZ2d@comcast.com>

Ghido wrote:
> Hi all, i need to save in an object some variable for use in  other
> parts of my software. it's possibile without create an istance of this
> class in every file? if yes how? 

Create a module, say, ``config``.  Then to save your object, you use 
something like::

     import config
     config.value = value_to_save

Now if you want to access it from other parts of your program, simply 
write::

     import config
     do_something_with(config.value)



STeVe


From jorge.vargas at gmail.com  Sat Nov  4 08:55:21 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Sat, 4 Nov 2006 13:55:21 +0000
Subject: Forum written in Python?
In-Reply-To: <Xns986FB78516025mosornet@161.53.160.64>
References: <Xns986FB78516025mosornet@161.53.160.64>
Message-ID: <32822fe60611040555s4722c4d2nb452a23976e90e6b@mail.gmail.com>

On 11/2/06, Karlo Lozovina <_karlo_ at _mosor.net_> wrote:
> Are there any forum or bulletin board systems written entirely in Python?
> I got sick of PhpBB, mostly because I can't tweak and fiddle with the
> code, since I really don't like PHP and don't know it that well.
>
> I thought of writting my own simple forum software, but if there are
> existing projects out there, I wouldn't mind contributing. So far I found
> out about Pocoo, but it seems to immature right now, I was looking for
> something comparable to PhpBB or IPB?
>
why not contribute to Pocoo?

>
> --
>  _______                                        Karlo Lozovina - Mosor
> |   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
> |       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
> |__|_|__||_____|_____|
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From theller at ctypes.org  Thu Nov 30 14:21:33 2006
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 30 Nov 2006 20:21:33 +0100
Subject: DDE (eSignal)
In-Reply-To: <1164912970.711046.214060@80g2000cwy.googlegroups.com>
References: <1164912970.711046.214060@80g2000cwy.googlegroups.com>
Message-ID: <eknavt$vm5$1@sea.gmane.org>

BBands schrieb:
> I have a Python ap that needs current stock prices, which I want to get
> from eSignal's DDE server. Following the win32all example:
> 
> import win32ui
> import dde
> server = dde.CreateServer()
> server.Create("eSignalDDE")
> conversation = dde.CreateConversation(server)
> conversation.ConnectTo("WINROS", "Last")
> last = conversation.Request("$spx")
> print last
> 
> Which almost works. The return in PythonWin is the correct price as a
> string with some extra chartacters appended.
> 
> '1402.670000000000\x00\x12\x00*\x00\x00\x004\xfb\x12\x00\xfd\x1a\xd9w4\xc1\x00'
> 
> Any thoughts on this?
> 
> TIA,
> 
>     jab
> 

Looks like a bug, either in the dde module or the dde server.
But it's easy to find a workaround:

>>> '1402.670000000000\x00\x12\x00*\x00\x00\x004\xfb\x12\x00\xfd\x1a\xd9w4\xc1\x00'.split("\0")[0]
'1402.670000000000'
>>>

Thomas



From __peter__ at web.de  Thu Nov 23 05:55:46 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 23 Nov 2006 11:55:46 +0100
Subject: How do I find possible matches using regular expression?
References: <1164272307.978986.158810@l39g2000cwd.googlegroups.com>
Message-ID: <ek3umo$4m5$03$1@news.t-online.com>

Andy wrote:

> I'm trying to do some predicting work over user input, here's my
> question:
> 
> for pattern r'match me', the string 'no' will definitely fail to match,
> but 'ma' still has a chance if user keep on inputting characters after
> 'ma', so how do I mark 'ma' as a possible match string?

The following may or may not work in the real world:

import re

def parts(regex, flags=0):
    candidates = []
    for stop in reversed(range(1, len(regex)+1)):
        partial = regex[:stop]
        try:
            r = re.compile(partial + "$", flags)
        except re.error:
            pass
        else:
            candidates.append(r)
    candidates.reverse()
    return candidates

if __name__ == "__main__":
    candidates = parts(r"[a-z]+\s*=\s*\d+", re.IGNORECASE)
    def check(*args):
        s = var.get()
        for c in candidates:
            m = c.match(s)
            if m:
                entry.configure(foreground="#008000")
                break
        else:
            entry.configure(foreground="red")


    import Tkinter as tk
    root = tk.Tk()
    var = tk.StringVar()
    var.trace_variable("w", check)
    entry = tk.Entry(textvariable=var)
    entry.pack()
    root.mainloop()

The example lets you write an assignment of a numerical value, e. g

meaning = 42

and colours the text in green or red for legal/illegal entries.

Peter


From sjmachin at lexicon.net  Thu Nov 16 06:23:50 2006
From: sjmachin at lexicon.net (John Machin)
Date: 16 Nov 2006 03:23:50 -0800
Subject: split CSV fields
In-Reply-To: <1163675506.590469.251910@h48g2000cwc.googlegroups.com>
References: <ejhduq$l5l$1@news.albasani.net>
	<mailman.238.1163673019.32031.python-list@python.org>
	<1163674830.440318.246920@f16g2000cwb.googlegroups.com>
	<1163675506.590469.251910@h48g2000cwc.googlegroups.com>
Message-ID: <1163676230.105303.39550@m73g2000cwd.googlegroups.com>


John Machin wrote:
> John Machin wrote:
> > Fredrik Lundh wrote:
> > > robert wrote:
> > >
> > > > What is a most simple expression for splitting a CSV line
> > >  > with "-protected fields?
> > > >
> > > > s='"123","a,b,\"c\"",5.640'
> > >
> > > import csv
> > >
> > > the preferred way is to read the file using that module.  if you insist
> > > on processing a single line, you can do
> > >
> > >      cols = list(csv.reader([string]))
> > >
> > > </F>
> >
> > Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> > (Intel)] on win32
> > | >>> import csv
> > | >>> s='"123","a,b,\"c\"",5.640'
> > | >>> cols = list(csv.reader([s]))
> > | >>> cols
> > [['123', 'a,b,c""', '5.640']]
> > # maybe we need a bit more:
> > | >>> cols = list(csv.reader([s]))[0]
> > | >>> cols
> > ['123', 'a,b,c""', '5.640']
> >
> > I'd guess that the OP is expecting 'a,b,"c"' for the second field.
> >
> > Twiddling with the knobs doesn't appear to help:
> >
> > | >>> list(csv.reader([s], escapechar='\\'))[0]
> > ['123', 'a,b,c""', '5.640']
> > | >>> list(csv.reader([s], escapechar='\\', doublequote=False))[0]
> > ['123', 'a,b,c""', '5.640']
> >
> > Looks like a bug to me; AFAICT from the docs, the last attempt should
> > have worked.
>
> Given Peter Otten's post, looks like
> (1) there's a bug in the "fmtparam" mechanism -- it's ignoring the
> escapechar in my first twiddle, which should give the same result as
> Peter's.
> (2)
> | >>> csv.excel.doublequote
> True
> According to my reading of the docs:
> """
> doublequote
> Controls how instances of quotechar appearing inside a field should be
> themselves be quoted. When True, the character is doubled. When False,
> the escapechar is used as a prefix to the quotechar. It defaults to
> True.
> """
> Peter's example should not have worked.

Doh. The OP's string was a raw string. I need some sleep.
Scrap bug #1!

| >>> s=r'"123","a,b,\"c\"",5.640'
| >>> list(csv.reader([s]))[0]
['123', 'a,b,\\c\\""', '5.640']
# What's that???
| >>> list(csv.reader([s], escapechar='\\'))[0]
['123', 'a,b,"c"', '5.640']
| >>> list(csv.reader([s], escapechar='\\', doublequote=False))[0]
['123', 'a,b,"c"', '5.640']

And there's still the problem with doublequote ....

Goodnight ...



From fredrik at pythonware.com  Sun Nov 19 12:00:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 18:00:07 +0100
Subject: Reloading after from adder import * ????
In-Reply-To: <1163953912.965436.8880@m73g2000cwd.googlegroups.com>
References: <1163901449.418534.251060@b28g2000cwb.googlegroups.com>	<1163914443.703646.64080@k70g2000cwa.googlegroups.com>
	<1163953912.965436.8880@m73g2000cwd.googlegroups.com>
Message-ID: <ejq2iq$s4g$1@sea.gmane.org>

Seymour wrote:

 > I just made some typos and was wondering if there was an easier
> way to clear the Python namespace at the interactive prompt rather than
> shutting Komodo down and restarting (really brute force).

most IDE's have a "reset interactive mode" command (it's ctrl-F6 in 
IDLE, for example).

another approach is to put the code in a script file, and run that file. 
  scripts always run in a clean namespace.

yet another approach is to stop using wildcard import ("from import *"). 
  if you refer to the things in Adder via the Adder namespace, you can 
just do

     reload(Adder)

to fetch the new version.

("from import *" is generally considered a "only use if you know what 
you're doing" construct in Python, so if it causes trouble for you, you 
shouldn't have used it in the first place, per definition ;-)

</F>



From email at christoph-haas.de  Fri Nov 24 06:42:43 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Fri, 24 Nov 2006 12:42:43 +0100
Subject: Email headers and non-ASCII characters
In-Reply-To: <4565bed2$0$13950$edfadb0f@dread15.news.tele.dk>
References: <mailman.639.1164291163.32031.python-list@python.org>
	<4565bed2$0$13950$edfadb0f@dread15.news.tele.dk>
Message-ID: <200611241242.43414.email@christoph-haas.de>

On Thursday 23 November 2006 16:31, Max M wrote:
> Christoph Haas skrev:
> > Hello, everyone...
> >
> > I'm trying to send an email to people with non-ASCII characters in
> > their names. A recpient's address may look like:
> >
> > "J?rg N?rgens" <joerg at nowhere>
> >
> > My example code:
> >
> > =================================
> > def sendmail(sender, recipient, body, subject):
> >    message = MIMEText(body)
> >    message['Subject'] = Header(subject, 'iso-8859-1')
> >    message['From'] = Header(sender, 'iso-8859-1')
> >    message['To'] = Header(recipient, 'iso-8859-1')
> >
> >    s = smtplib.SMTP()
> >    s.connect()
> >    s.sendmail(sender, recipient, message.as_string())
> >    s.close()
> > =================================
> >
> > However the Header() method encodes the whole expression in
> > ISO-8859-1:
> >
> > =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?=
> >
> > However I had expected something like:
> >
> > "=?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?=" <joerg at nowhere>
> >
> > Of course my mail transfer agent is not happy with the first string
>
> Why offcourse?

Because my MTA doesn't care about MIME. It just transports the email. And 
it expects an email address in <...> but doesn't decode =?iso...? strings.

> But it seems that you are passing the Header object a 
> utf-8 encoded string, not a latin-1 encoded.
> You are telling the header the encoding. Not asking it to encode.

Uhm, okay. Let's see:

u'"J?rg N?rgens" <joerg at nowhere>'.encode('latin-1')

=> '"J\xc3\xb6rg N\xc3\xb8rgens" <joerg at nowhere>'

So far so good. Now run Header() on it:

=> '=?utf-8?b?IkrDtnJnIE7DuHJnZW5zIiA8am9lcmdAbm93aGVyZT4=?='

Still nothing like <...> in it and my MTA is unhappy again. What am I 
missing? Doesn't anyone know how mail clients handle that encoding?

Desperately,
 Christoph


From stefan.behnel-n05pAM at web.de  Tue Nov 21 12:34:45 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 21 Nov 2006 18:34:45 +0100
Subject: Spyce system requirements?
In-Reply-To: <1164127246.887153.98820@m7g2000cwm.googlegroups.com>
References: <1164127246.887153.98820@m7g2000cwm.googlegroups.com>
Message-ID: <456338B5.9000705@web.de>

walterbyrd wrote:
> Does anybody know? What versionof Apache is required? If used with
> mod_python, what version of mod_python? Why version of Python is
> required?

I don't think it has any requirements in that regard. Just try it. You can
even use it to generate static web pages.

Stefan


From apardon at forel.vub.ac.be  Tue Nov 28 06:36:55 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 28 Nov 2006 11:36:55 GMT
Subject: Modifying every alternate element of a sequence
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <slrnemo7qn.al8.apardon@rcpc42.vub.ac.be>

On 2006-11-28, jm.suresh at no.spam.gmail.com <jm.suresh at gmail.com> wrote:
> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
>
> input = [1,2,3,4,5,6]
> wanted = [1,-2,3,-4,5,-6]
>
> I can implement it like this:
>
> input = range(3,12)
> wanted = []
> for (i,v) in enumerate(input):
>     if i%2 == 0:
>         wanted.append(v)
>     else:
>         wanted.append(-v)
>
> But is there any other better way to do this.

Wether this is better, I'll leave that for others to decide. But this
is a possibility:

wanted = [ (1 - 2*(i%2)) * item for i, item in enumerate(input)]

-- 
Antoon Pardon


From aisaac at american.edu  Sun Nov 12 06:49:12 2006
From: aisaac at american.edu (Alan G Isaac)
Date: Sun, 12 Nov 2006 11:49:12 GMT
Subject: Fredrik Lundh [was "Re: explicit self revisited"]
References: <ej5fuv$a4a$1@online.de>
	<mailman.2110.1163283825.11739.python-list@python.org>
	<1163288444.893136.42030@h54g2000cwb.googlegroups.com>
	<mailman.2119.1163289905.11739.python-list@python.org>
	<1163315672.921664.306460@e3g2000cwe.googlegroups.com>
Message-ID: <op.tiwi37blgsh0hn@casc64043305.myhome.westell.com>

On Sun, 12 Nov 2006 02:14:32 -0500, Doug <aj108778 at gmail.com> wrote:
> I was going to link to
> a definition of FUD to show I really meant to use that term.

Oooh.
If you had just mentioned your dyslogia,
it would have saved us all some time.
Thanks!
Alan


From B.Ogryczak at gmail.com  Wed Nov 29 12:27:03 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 29 Nov 2006 09:27:03 -0800
Subject: pickle and infinity
In-Reply-To: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
Message-ID: <1164821223.799371.71730@14g2000cws.googlegroups.com>

To make things more interesting -- Solaris version:

>>> x = 1e310
>>> x
Infinity
>>> import pickle
>>> pickle.dumps(x)
'FInfinity\n.'
>>> pickle.loads(_)
Infinity
>>> pickle.dumps(x,1)
[...]
SystemError: frexp() result out of range



From fredrik at pythonware.com  Tue Nov 14 09:14:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Nov 2006 15:14:50 +0100
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejcj0q$2l8$1@sea.gmane.org>

"erikcw" wrote:

> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.
>
> Here is some sample data:
> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> 0.10]

silly solution:

for i in range(1, len(data)-1):
    if data[i-1] < data[i] > data[i+1] or data[i-1] > data[i] < data[i+1]:
        print i

(the above doesn't handle the "edges", but that's easy to fix)

</F> 





From tjreedy at udel.edu  Tue Nov 14 14:41:18 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 14 Nov 2006 14:41:18 -0500
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com><455226c0$0$17087$c3e8da3@news.astraweb.com><slrnel6088.tvc.nick@irishsea.home.craig-wood.com><45530513$0$25102$426a74cc@news.free.fr><slrnel6dec.360.nick@irishsea.home.craig-wood.com><45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au><4554AAB4.10002@hobbshouse.org>
	<ej2igj$826$1@sea.gmane.org><4554D416.70408@hobbshouse.org>
	<ej2pa2$vpq$1@sea.gmane.org><4554ECBF.7040603@hobbshouse.org>
	<ej35ue$52k$1@sea.gmane.org><4558BEC3.3020003@hobbshouse.org>
	<ejags8$l2u$1@sea.gmane.org><4558D443.1030802@hobbshouse.org>
	<ejakm2$44p$1@sea.gmane.org><4558DBEF.8010409@hobbshouse.org>
	<ejaqdh$q8v$1@sea.gmane.org><02da01c707c2$8345fb80$03000080@hendrik><ejcsb8$979$1@sea.gmane.org>
	<17753.63965.96495.419227@montanaro.dyndns.org>
Message-ID: <ejd655$ffv$1@sea.gmane.org>


<skip at pobox.com> wrote in message 
news:17753.63965.96495.419227 at montanaro.dyndns.org...
>    >> I confess I find myself in the position of a Yorkshire Youngster - 
> I
>    >> don't believe you!
>
>    Robert> Okay, not often enough or annoyingly enough for me to remember
>    Robert> having done so.  Perhaps seven years ago when I started using
>    Robert> Python, but not any time recent.
>
> If your editor knows about Python's block structure (as Emacs's 
> python-mode
> does), when you forget the colon it's immediately obvious because the 
> next
> line doesn't autoindent properly.

The same is true of the editor in IDLE. 





From Leo.Kislov at gmail.com  Wed Nov 29 07:33:10 2006
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 29 Nov 2006 04:33:10 -0800
Subject: Problem with imaplib (weird result if mailbox contains a %)
In-Reply-To: <slrnemqfhg.al8.apardon@rcpc42.vub.ac.be>
References: <slrnemoe7t.al8.apardon@rcpc42.vub.ac.be>
	<1164727244.400677.36150@l12g2000cwl.googlegroups.com>
	<slrnemqfhg.al8.apardon@rcpc42.vub.ac.be>
Message-ID: <1164803590.454993.141050@j72g2000cwa.googlegroups.com>

Antoon Pardon wrote:
> On 2006-11-28, Leo Kislov <Leo.Kislov at gmail.com> wrote:
> >
> > Antoon Pardon wrote:
> >> This little program gives IMO a strange result.
> >>
> >> import imaplib
> >>
> >> user = "cpapen"
> >>
> >> cyr = imaplib.IMAP4("imap.vub.ac.be")
> >> cyr.login("cyrus", "cOn-A1r")
> >> rc, lst = cyr.list('""', "user/%s/*" % user)
> >> for el in lst:
> >>   print "%r" % (el,)
> >>
> >> And the result is:
> >>
> >> '(\\HasNoChildren) "/" "user/cpapen/Out"'
> >> '(\\HasNoChildren) "/" "user/cpapen/Punten"'
> >> '(\\HasNoChildren) "/" "user/cpapen/Spam"'
> >> '(\\HasNoChildren) "/" "user/cpapen/agoog to be"'
> >> '(\\HasNoChildren) "/" "user/cpapen/artistiek &- kunst"'
> >> '(\\HasNoChildren) "/" "user/cpapen/copains et copinnes =x="'
> >> '(\\HasNoChildren) "/" "user/cpapen/cp &- writing"'
> >> '(\\HasNoChildren) "/" "user/cpapen/examen"'
> >> '(\\HasNoChildren) "/" "user/cpapen/important info (pass)"'
> >> '(\\HasNoChildren) "/" "user/cpapen/lesmateriaal"'
> >> '(\\HasNoChildren) "/" "user/cpapen/love &- flesh for fantasy"'
> >> '(\\HasNoChildren) "/" "user/cpapen/media"'
> >> '(\\HasNoChildren) "/" "user/cpapen/music &- beats"'
> >> ('(\\HasNoChildren) "/" {25}', 'user/cpapen/newsletters %')
> >> ''
> >> '(\\HasNoChildren) "/" "user/cpapen/organisatie &- structuur"'
> >> '(\\HasNoChildren) "/" "user/cpapen/sociale wetenschappen"'
> >> '(\\HasNoChildren) "/" "user/cpapen/the closest ones to me [x]"'
> >> '(\\HasNoChildren) "/" "user/cpapen/vubrations"'
> >> '(\\HasNoChildren) "/" "user/cpapen/wm2addressbook"'
> >> '(\\HasNoChildren) "/" "user/cpapen/wm2prefs"'
> >> '(\\HasNoChildren) "/" "user/cpapen/wm2signature"'
> >>
> >>
> >> What I have a problem with is the 14th and 15th line.
> >> All other entries are strings but the 14th is a tuple.
> >> and the 15th is an empty string. As far as I can tell
> >> every time a "%" is in the mailbox name I get this kind of
> >> result.
> >>
> >> I'm using python 2.3.3 and the imap sytem is Cyrus.
> >>
> >> Can someone explain what is going one?
> >>
> >> Is this a bug?
> >
> > Empty string seems to be a bug. But tuple is by design, read the docs
> > and imap rfc. The protocol is convoluted in the first place, and so is
> > python interface.
>
> Are there more docs than at http://www.python.org/doc/. I don't find
> those very helpfull in explaining this.
>
> I also took a look at rfc 2060 and to be honest I don't find anything
> there to explain this difference. I only took a closer look at section
> 7.2.2. So maybe I should look somewehere else but after reading section
> 7.2.2. I don't understand why the list method returned a tuple for this
> mailbox instead of the following string:
>
>    '(\\HasNoChildren) "/" "user/cpapen/newsletters %"'

This is described in section 4.3. imaplib is too close to the protocol.
It should interpret response for each command separately. For example
list method could return list of tuples like:

("\\HasNoChildren", "/", "user/cpapen/newsletters %")

Without this abstraction level in imaplib you have to build it
yourself.

> >
> >> If it is, is it fixed in later versions?
> >
> > Why don't you try to pull imaplib.py from later versions? I don't think
> > it changed that much so it should be compatible with python 2.3
>
> I could take my hands on a 2.4 version and the result was the same.

I was talking only about empty string response. Is it still there?
Anyway, this issue requires investigation. That could also be a bug in
the server.

  -- Leo



From paul at boddie.org.uk  Thu Nov 16 05:47:06 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 02:47:06 -0800
Subject: lxml/ElementTree and .tail
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<mailman.235.1163672112.32031.python-list@python.org>
Message-ID: <1163674026.032623.151600@e3g2000cwe.googlegroups.com>

Fredrik Lundh wrote:
>
> It's not very difficult, really; especially if you, as Stefan said,
> think in infoset terms rather "a sequence of little piggies" terms.

Are piggies part of the infoset too? Does the Piggie class represent a
piggie from the infoset plus a stretch of the road to the market? ;-)

Paul



From luismgz at gmail.com  Thu Nov 16 12:20:32 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 16 Nov 2006 09:20:32 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <mailman.253.1163682538.32031.python-list@python.org>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<mailman.253.1163682538.32031.python-list@python.org>
Message-ID: <1163697632.352189.110920@h54g2000cwb.googlegroups.com>


Fredrik Lundh ha escrito:

> Luis M. Gonz?lez wrote:
>
> > But as a web development language, it's olnly when people started to
> > look for the "rails killer" and many python alternatives started to
> > come up (although Django has been in development for a long time before
> > all this hype).
>
> nah, people have built web stuff on Python for as long as we've had a web.
>
> </F>


I know, but would you consider a python cgi application a good
competence against php?



From bignose+hates-spam at benfinney.id.au  Thu Nov  9 23:09:57 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 10 Nov 2006 15:09:57 +1100
Subject: how is python not the same as java?
References: <1163119480.524214.186540@e3g2000cwe.googlegroups.com>
	<ej0se4$jt9$1@sea.gmane.org>
Message-ID: <87k624j622.fsf@benfinney.id.au>

Steve Holden <steve at holdenweb.com> writes:

> Java is horrible, Oython is not.

Is that the predecessor to Python, the one that could only be
expressed in vowel noises?

-- 
 \            "Beware of and eschew pompous prolixity."  -- Charles A. |
  `\                                                         Beardsley |
_o__)                                                                  |
Ben Finney



From mirandacascade at yahoo.com  Mon Nov 20 12:26:38 2006
From: mirandacascade at yahoo.com (mirandacascade at yahoo.com)
Date: 20 Nov 2006 09:26:38 -0800
Subject: ElementSOAP and <soap:Header>
In-Reply-To: <mailman.496.1164008567.32031.python-list@python.org>
References: <1164007864.239490.20810@k70g2000cwa.googlegroups.com>
	<mailman.496.1164008567.32031.python-list@python.org>
Message-ID: <1164043598.088253.29790@m73g2000cwd.googlegroups.com>


Fredrik Lundh wrote:

> make sure you have the 0.5 release

May I confirm the following recommendations/dependencies:
1) if one wants to use ElementSOAP to create a message that includes
<soap:Header>, it is recommended that one use the 0.5 release of
ElementSOAP
2) if one wants to use the 0.5 release of ElementSOAP, one should be
using Python 2.5

Thank you.



From paul at boddie.org.uk  Thu Nov 16 19:37:40 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 16:37:40 -0800
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au> <4s38t9Ftln2aU1@mid.uni-berlin.de>
	<1163689149.613418.40020@b28g2000cwb.googlegroups.com>
	<455cfea5$1@quokka.wn.com.au>
Message-ID: <1163723860.233529.17400@m7g2000cwm.googlegroups.com>

timmy wrote:
> Paul Boddie wrote:
> > Diez B. Roggisch wrote:

[Re-adding material...]

> >>At least to me - and I presume pretty much everybody except you in this
> >>thread - this means that he is interested in executing arbitrary pieces of
> >>python code inside the interpreter, which comes from e.g. players who
> >>customize their in-game behavior of their avatars.

Here is where the issue of sandboxing is indirectly introduced into the
discussion.

> >>Now how exactly does linux (or any other resource limiting technique on any
> >>OS) help here - killing the whole game server surely isn't a desirable
> >>solution when one player goes berserk, might it be intentionally or not.
>
> > And this is where the hot topics collide: people want performant
> > multitasking with lots of shared state (the global interpreter lock
> > controversy) together with sandboxing so that the individual threads
> > can't access most of that shared state (the restricted execution
> > controversy).
>
> i'm not talking about sandboxing, that's a whole different kettle of
> fish. i'm talking about resource managment options you can set in for
> instance, the linux kernel.

Yes, I know. I was merely covering related concepts of relevance
introduced earlier in the discussion (see above). In any case, if you
only have control over resource limits on execution contexts at the
operating system process level, yet your server architecture is
entirely based on a single process with many (micro)threads, then
you've got to consider the problem of restricting their
behaviour/consumption using the facilities available to you, most
likely by considering other server architectures. This, I argue, is
perfectly reasonable in order to solve both issues being discussed
using operating system facilities.

> you can limit the cpu and memory a process uses while still allowing it
> the same access it would have outside of a sandbox. that way if any
> clever monkeys try to dos you they merely consume their alloted quota.

Indeed.

Paul



From fredrik at pythonware.com  Wed Nov 15 03:37:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 09:37:48 +0100
Subject: FAQ: How do I calculate what quoted strings and numbers mean?
In-Reply-To: <1163579122.362383.203240@k70g2000cwa.googlegroups.com>
References: <1163168083.054745.32170@f16g2000cwb.googlegroups.com>	<mailman.8.1163336252.32031.python-list@python.org>
	<1163579122.362383.203240@k70g2000cwa.googlegroups.com>
Message-ID: <ejejkr$e3a$1@sea.gmane.org>

p.lavarre at ieee.org wrote:

> I was happy enough when I saw an improvement like:
> 
>>>> import os
>>>> result = eval("os.system('pwd')")
> .../Desktop
>>>> result = eval("os.system('pwd')", {"whatever": {}})
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<string>", line 1, in <module>
> NameError: name 'os' is not defined

sure, but the os module isn't very far away:

 >>> result = eval("__import__('os').system('pwd')", {"whatever": {}})
/home/fredrik

</F>



From skip at pobox.com  Tue Nov 14 12:16:13 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 14 Nov 2006 11:16:13 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <ejcsb8$979$1@sea.gmane.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2igj$826$1@sea.gmane.org>
	<4554D416.70408@hobbshouse.org> <ej2pa2$vpq$1@sea.gmane.org>
	<4554ECBF.7040603@hobbshouse.org> <ej35ue$52k$1@sea.gmane.org>
	<4558BEC3.3020003@hobbshouse.org> <ejags8$l2u$1@sea.gmane.org>
	<4558D443.1030802@hobbshouse.org> <ejakm2$44p$1@sea.gmane.org>
	<4558DBEF.8010409@hobbshouse.org> <ejaqdh$q8v$1@sea.gmane.org>
	<02da01c707c2$8345fb80$03000080@hendrik>
	<ejcsb8$979$1@sea.gmane.org>
Message-ID: <17753.63965.96495.419227@montanaro.dyndns.org>

    >>> Michael Hobbs wrote:
    >>>> True enough. Although, I have to ask how many times you define a new
    >>>> function only to have Python spit a syntax error out at you saying that
    >>>> you forgot a colon. It happens to me all the time.
    >> 
    >> I confess I find myself in the position of a Yorkshire Youngster - I
    >> don't believe you!

    Robert> Okay, not often enough or annoyingly enough for me to remember
    Robert> having done so.  Perhaps seven years ago when I started using
    Robert> Python, but not any time recent.

If your editor knows about Python's block structure (as Emacs's python-mode
does), when you forget the colon it's immediately obvious because the next
line doesn't autoindent properly.

Skip


From bignose+hates-spam at benfinney.id.au  Sun Nov 26 19:59:57 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 27 Nov 2006 11:59:57 +1100
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164471238.033790.243890@14g2000cws.googlegroups.com>
	<mailman.722.1164489213.32031.python-list@python.org>
	<1164586594.649105.282020@h54g2000cwb.googlegroups.com>
Message-ID: <87wt5hsnzm.fsf@benfinney.id.au>

"Noah Slater" <nslater at gmail.com> writes:

> I do not think this thread is an embarrassment to the community. I
> think it speaks volumes about people's commitment to free software.
>
> While we can applaud such contributions it is no excuse to waiver on
> one's ethics and principles.

Yes, this was also my motivation for discussing it here.

> Regardless of content, or even format, if the Python Papers are not
> free as per the FSF's definition they are encumbered.
>
> I am hoping that the author/publishers will reconsider the choice of
> licencing.

I also hope that a free license can be chosen. In the meantime though,
I'm very happy that (as announced in a new thread) the existing
license terms are no longer being falsely described as free.

-- 
 \        "If you ever drop your keys into a river of molten lava, let |
  `\              'em go, because, man, they're gone."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From bj_666 at gmx.net  Sat Nov  4 08:50:51 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 04 Nov 2006 14:50:51 +0100
Subject: WSDL?
References: <454ba334$0$12110$88260bb3@free.teranews.com>
	<mailman.1762.1162647487.11739.python-list@python.org>
Message-ID: <pan.2006.11.04.13.50.50.713078@gmx.net>

In <mailman.1762.1162647487.11739.python-list at python.org>, Jorge Vargas
wrote:

> and please please don't go to corba we need to kill that.

Have you real reasons or is this a religious thing?  As I see it Corba is
much better supported by Python libs than SOAP is.

Ciao,
	Marc 'BlackJack' Rintsch


From gabor at nekomancer.net  Sat Nov 18 04:16:11 2006
From: gabor at nekomancer.net (gabor)
Date: Sat, 18 Nov 2006 10:16:11 +0100
Subject: What do I look for in a shared Python host?
In-Reply-To: <ejm91v$2j4$1@newsreader2.utanet.at>
References: <1163815003.733525.6380@b28g2000cwb.googlegroups.com>
	<ejm91v$2j4$1@newsreader2.utanet.at>
Message-ID: <b2ffa$455ecf57$59ad1aca$21696@news.flashnewsgroups.com>

Gregor Horvath wrote:
> walterbyrd schrieb:
>> What other "gotchas" would I look for?
>>
> 
> Maybe this is helpfull for you:
> 
> http://docs.turbogears.org/1.0/Hosting
> 
and this:

http://code.djangoproject.com/wiki/DjangoFriendlyWebHosts

gabor


From aj108778 at gmail.com  Sun Nov 12 02:18:48 2006
From: aj108778 at gmail.com (Doug)
Date: 11 Nov 2006 23:18:48 -0800
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.1983.1163089419.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<mailman.1983.1163089419.11739.python-list@python.org>
Message-ID: <1163315927.963179.114030@m73g2000cwd.googlegroups.com>


Michael Hobbs wrote:
> Can anyone find a flaw with this change in syntax?
>
> Instead of dividing a compound statement with a colon, why not divide it
> on a newline? For example, the colon could be dropped from this statement:
>     if self.hungry:
>         self.eat()
> to
>     if self.hungry
>         self.eat()
>
> Python is already sensitive to whitespace and the newline anyway, so why
> not put it to good use? For example, Python rejects this statement
> because of the newline present:
>     if self.hungry or
>       self.depressed:
>         self.eat()
> You need to use the backslash to continue the expression on the next line:
>     if self.hungry or \
>       self.depressed:
>         self.eat()
> The colon that divides the statement therefore seems redundant. The
> colon could continue to be used for single-line statements:
>     if self.hungry: self.eat()
>
> I think the colon could be omitted from every type of compound
> statement: 'if', 'for', 'def', 'class', whatever. Am I missing anything?
>
> Thanks,
> - Mike

It is a very good idea as the colon is technically redundant (not
necessary for parsing, aside from one liners) and actually hurts
readability (and writeability).  The "evidence" people cite for the
advantage of using a colon is research done by users of the ABC
language, python's predecessor.  They forget that A) that was like 20
years ago, B) the language was designed for children, and C) the
keywords in ABC are IN ALL CAPS LIKE THIS (hurting readability and
writeability) and thus adding a colon obviously helps restore some
readability for users in that case but not in python's.

However, python is far too old to accept any fundamental changes to
syntax at this point.



From paul at boddie.org.uk  Thu Nov 16 08:19:20 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Nov 2006 05:19:20 -0800
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
Message-ID: <1163683160.312575.250620@b28g2000cwb.googlegroups.com>

Luis M. Gonz?lez wrote:
>
> OK. But since when has python been considered a viable alternative for
> web development?

Since the Bobo era (ca. 1997), but quite possibly before. Sure, you had
to build your own mega-framework back then, but that's what a lot of
people were doing anyway.

> As a generalp purpose language, it's older.
> But as a web development language, it's olnly when people started to
> look for the "rails killer" and many python alternatives started to
> come up (although Django has been in development for a long time before
> all this hype).

I remember maintaining a long list of Web frameworks a few *years* ago.
It's true that most of them didn't resemble the slick marketed package
that you see with something like TurboGears, but you might be surprised
how much you got with Webware back in 2001:

http://www.webwareforpython.org/Docs/RelNotes-0.5.html

> I remember well, just a few months ago, there were many alternatives
> (remember "subway"?).

Some people would like you to believe that they pioneered the
mega-framework, amongst other things. Freely available documentation
undermines such claims if you know where to look (and actually choose
to do so).

Paul



From dannycolligan at gmail.com  Tue Nov 21 11:48:53 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 21 Nov 2006 08:48:53 -0800
Subject: Vim scripts for editing Python?
In-Reply-To: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
Message-ID: <1164127733.241526.126200@m7g2000cwm.googlegroups.com>


Rainy wrote:
> Hi, did anyone make a good set of scripts for editing Python in Vim? I
> know there is one on vim.org but it isn't very advanced. thx..

Here's what google has to say about it:
http://www.google.com/search?hl=en&q=site%3Ahttp%3A%2F%2Fwww.vim.org%2Ftips%2F+python&btnG=Google+Search
http://www.google.com/search?hl=en&lr=&safe=off&q=site%3Ahttp%3A%2F%2Fwww.vim.org%2Fscripts%2F+python&btnG=Search

Danny



From grahamjfeeley at optusnet.com.au  Sun Nov 19 04:11:35 2006
From: grahamjfeeley at optusnet.com.au (Graham Feeley)
Date: Sun, 19 Nov 2006 19:11:35 +1000
Subject: WebScraping
References: <454d0fb1$0$11970$afc38c87@news.optusnet.com.au>
Message-ID: <45601fca$0$5106$afc38c87@news.optusnet.com.au>

Well I would like to publicly thank Bernard Chhun for actually writing this 
script and "pretting " it up for me.
He is truly a talented guy.
He used Beautifull Soup and Regex which i am still coming to terms trying to 
understand them any way Thanks again Bernard.
Regards
graham

"Graham Feeley" <grahamjfeeley at optusnet.com.au> wrote in message 
news:454d0fb1$0$11970$afc38c87 at news.optusnet.com.au...
> Can someone steer me to scripts / modules etc on webscraping please???
> Ultimately I would like someone to write a script for me.
> However i am still searching for documentation on this subject
> Thanks Graham
>
>
> 




From dlenski at gmail.com  Mon Nov 13 17:26:40 2006
From: dlenski at gmail.com (Dan Lenski)
Date: 13 Nov 2006 14:26:40 -0800
Subject: Is python for me?
In-Reply-To: <mailman.78.1163442868.32031.python-list@python.org>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<1163441697.231672.163480@k70g2000cwa.googlegroups.com>
	<mailman.78.1163442868.32031.python-list@python.org>
Message-ID: <1163456800.148818.181940@m7g2000cwm.googlegroups.com>


Carsten Haese wrote:
> On Mon, 2006-11-13 at 10:14 -0800, Dan Lenski wrote:
> > lennart wrote:
> > > So i ask myself is python the language I'm looking for?
> >
> > Yep!  Python is very much a jack-of-all-trades language.
>
> I'll run the risk of being nitpicky, but the full phrase is "Jack of all
> trades, master of none," which doesn't do Python justice. Python is a
> master of all trades!

Indeed!  That's why I left out the "master of none" prt :-)  For me,
Python is "jack of all trades, master of everything I've thrown at it
so far."

Dan



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov 23 06:27:55 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 23 Nov 2006 22:27:55 +1100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <pan.2006.11.23.11.27.54.956445@REMOVE.THIS.cybersource.com.au>

On Thu, 23 Nov 2006 10:48:32 +0000, Tor Erik Soenvisen wrote:

> Hi,
> 
> 
> (len(['']) is 1) == (len(['']) == 1) => True

You shouldn't rely on this behaviour:

>>> x = 100000
>>> len('a' * x) == x
True
>>> len('a' * x) is x
False

(Your results may vary -- this depends on the implementation.)



> Is this the case for all numbers? I've tried running the following:
> 
> for i in range(10000):
>     	for j in range(10000):
> 		if i != j:
> 			assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
> (i))
> 
> which executes fine. Hence, 0-9999 is okey... 

This doesn't necessarily hold for all integers -- again, it depends on the
implementation, the precise version of Python, and other factors. Don't
rely on "is" giving the same results as "==".

>>> (1+2+3+4+5)**7 == 15**7
True
>>> (1+2+3+4+5)**7 is 15**7
False

> But this is a relatively 
> small range, and sooner or later you probably get two numbers with the same 
> id... Thoughts anyone?

No, you will never get two objects existing at the same time with the same
id. You will get two objects that exist at different times with the same
id, since ids may be reused when the object is deleted.

> PS: For those of you who don't know: keyword is compares object identities

Exactly. There is no guarantee that any specific integer object "1" must
be the same object as another integer object "1". It may be, but it isn't
guaranteed.

I think the only object that is guaranteed to hold for is None. None is a
singleton, so there is only ever one instance. Hence, you should test for
None with "obj is None" rather than ==, because some custom classes may do
silly things with __eq__:

class Blank(object):
    """Compares equal to anything false, including None."""
    def __eq__(self, other):
        return not other



-- 
Steven.



From dima at trit.invalid  Tue Nov 21 05:55:46 2006
From: dima at trit.invalid (Dima Dorfman)
Date: Tue, 21 Nov 2006 10:55:46 -0000
Subject: FreeBSD + Python + Oracle
References: <mailman.531.1164092848.32031.python-list@python.org>
Message-ID: <slrnem5mpi.1qjl.dima@charade.trit.org>

On 2006-11-21, Vyacheslav Sotnikov <bsdforfree at rambler.ru> wrote:
> is anybody has any success in taking this components live together? I
> need to access remote Oracle 9i from freebsd 6.2 machine using python
> 2.4.4. Thanks in advance for answer.

Yes, I've done this before. You'll have to run Python on FreeBSD but
using the Linux ABI ("Linuxulator" or "Linux emulation"). It's a bit
of a pain to set up, but it works well after that.

The basic procedure is:

  - Load the linux module and install the linux-base and -devtools ports

  - Install the Linux Oracle client and get it working enough that you
    can run sqlplus

  - Compile Python for the Linux ABI (you'll have to install all the
    appropriate linux libraries if you need extension modules like
    gzip, readline, etc.)

  - Compile the Oracle extension modules. I've successfully used
    DCOracle2 and cx_Oracle in this scenario.

That should be it, but it's been a while since I had to do it and I
might've missed some steps.

All of the above is okay if you want to run FreeBSD because you like
FreeBSD; it doesn't help if you want to do it because you need to use
some library that's only available for FreeBSD. In that case, you can
probably manage some kind of IPC between Linux-Python-on-FreeBSD and
FreeBSD-Python-on-FreeBSD.


From bdesth.quelquechose at free.quelquepart.fr  Wed Nov 15 19:47:59 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Nov 2006 01:47:59 +0100
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <Xns987CACBEFEFDCcastleamber@130.133.1.4>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
Message-ID: <455bb047$0$28561$426a74cc@news.free.fr>

John Bokma a ?crit :
> Harry George <harry.g.george at boeing.com> wrote:
>  
> 
>>Short answer: People use Python instead of Java because people (at
>>least intelligent people) tend to avoid pain.
> 
> 
> Intelligent people don't suffer from fanboy sentiments. They just pick a 
> language that works best for them.
> 
Which is *exactly* what Harry said...


From scott.daniels at acm.org  Wed Nov 22 09:47:54 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 22 Nov 2006 06:47:54 -0800
Subject: What's going on here?
In-Reply-To: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
References: <B0Z8h.19007$Jl6.10800@fe19.usenetserver.com>
Message-ID: <456459ca$1@nntp0.pdx.net>

Dale Strickland-Clark wrote:
> Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
>>>> a = object()
>>>> a.spam = 1
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'object' object has no attribute 'spam'
>>>> class B(object): pass
>>>> a = B()
>>>> a.spam = 1
>>>>
> 
> What is subclassing adding to the class here? Why can't I assign to
> attributes of an instance of object?

object itself doesn't have a __dict__ slot, so that very small objects
(such as points) can be built without that overhead.

--Scott David Daniels
scott.daniels at acm.org


From mail at microcorp.co.za  Fri Nov 17 03:06:21 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 17 Nov 2006 10:06:21 +0200
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <035501c70a1f$4557e2c0$03000080@hendrik>

"Stephan Kuhagen" <nospam at domain.tld> wrote:


> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. All those limits are managed by the interpreter for script code
> and hence can be limited for untrusted code by the interpreter. This also
> does not really make DoS impossible (what about C extensions? - maybe
> restricting "import"?). - As I said before in this thread, making a sandbox
> really secure is a hard job, and may need some serious changes in the
> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
> to have.

I seem to recall previous discussion on this group about a thing called the
bastion module,
and that it was deprecated.  Not sure if it has any relevance.

- Hendrik




From __peter__ at web.de  Sun Nov 19 09:25:20 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 19 Nov 2006 15:25:20 +0100
Subject: tempfile.NamedTemporaryFile wont work
References: <456049ca$0$4692$426a74cc@news.free.fr>
	<pan.2006.11.19.13.49.28.701463@REMOVE.THIS.cybersource.com.au>
Message-ID: <ejppfj$bb4$01$1@news.t-online.com>

Steven D'Aprano wrote:

> On Sun, 19 Nov 2006 13:11:13 +0100, Imbaud Pierre wrote:
> 
>> On suse 9.3, tempfile.NamedTemporaryFile() doesnt work as expected.
> [snip]
> 
>> Symptom: the file does not always exist, after the call to
>> NamedTemporaryFile(). Or at least its not seen by the strings command,
>> or by os.path.exists.
>> 
>> I guess the bug is pretty much os dependent, or even filesystem
>> dependent (Im on reiserfs). Maybe the os is buggy, maybe, somehow, the
>> python interface. Or did I miss something?
>> Shame, I didnt even try to check for a python bug tracker.
> 
> I can verify this problem occurs on Fedora Core 5 too:
> 
> import os
> import sys
> import tempfile
> import subprocess
> def test(n):
> chunk = ': +++ abcd +++'
> for i in xrange(n):
> tf = tempfile.NamedTemporaryFile()
> tfName = tf.name
> tf.seek(0)
> tf.write(str(i) + chunk)
>                 tf.flush()
> if not os.path.exists(tfName):
> print 'pre-check: %s not there' % tfName
> subprocess.Popen(['strings', tfName])
> if not os.path.exists(tfName):
> print 'post-check: %s not there' % tfName
> 
> 
> And here is a typical run, with the boring bits removed for ease of
> reading:
> 
>>>> test(30)
> 0: +++ abcd +++
> 1: +++ abcd +++
>     [ more of the same ]
> 14: +++ abcd +++
> strings: '/tmp/tmpOALbx9': No such file
> 16: +++ abcd +++
> 17: +++ abcd +++
> 18: +++ abcd +++
>     [ more of the same ]
> 27: +++ abcd +++
> strings: /tmp/tmpdc52Nz: No such file or directory
> 29: +++ abcd +++
> 
> 
> Curiouser and curiouser... not only does os.path.exist always report the
> temp file as existing (at least in my tests), even when strings can't find
> it, but strings returns different error messages.
> 
> Is it possible this is a bug in strings?

What /you/ are seeing is not a bug, I think. Popen() is asynchronous,
therefore you may enter the second iteration -- which implicitly closes the
temporary file -- before strings actually tries to access it. Use call()
and everything should be fine.

Peter



From dickinsm at gmail.com  Wed Nov 29 19:31:30 2006
From: dickinsm at gmail.com (dickinsm at gmail.com)
Date: 29 Nov 2006 16:31:30 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164844778.623531.275300@h54g2000cwb.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<1164843185.361082.146740@16g2000cwy.googlegroups.com>
	<1164844778.623531.275300@h54g2000cwb.googlegroups.com>
Message-ID: <1164846690.746084.174820@80g2000cwy.googlegroups.com>



On Nov 29, 6:59 pm, "Steve Bergman" <s... at rueb.com> wrote:
> dicki... at gmail.com wrote:
> > > BTW, can this code be made any more efficient?
>
> > I'm not sure, but the following code takes around 6 seconds on my
> > 1.2Ghz iBook. How does it run on your machine?
>
> Hmm.  Come to think of it, my algorithm isn't the sieve.

Right.  I guess the point of the sieve is that you don't have to spend
any time
finding that a given odd integer is not divisible by a given prime;
all the
multiplies are done up front, so you save all the operations
corresponding to
the case when x % y != 0 in your code.  Or something.

> Anyway, this is indeed fast as long as you have enough memory to handle
> it for the range supplied.

The sieve can be segmented, so that the intermediate space requirement
for
computing the primes up to n is O(sqrt(n)).  (Of course you'll still
need
O(n/log n) space to store the eventual list of primes.)    Then there
are all sorts
of bells and whistles (not to mention wheels) that you can add to
improve the
running time, most of which would considerably complicate the code.

The book by Crandall and Pomerance (Primes: A Computational
Perspective)
goes into plenty of detail on all of this.

Mark Dickinson



From roy at panix.com  Tue Nov 14 09:55:11 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 14 Nov 2006 09:55:11 -0500
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <roy-DA148C.09551114112006@reader2.panix.com>

"erikcw" <erikwickstrom at gmail.com> wrote:
> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.

I think you want a control chart.  A good place to start might be 
http://en.wikipedia.org/wiki/Control_chart.  Even if you don't actually 
graph the data, understanding the math behind control charts might help you 
with your analysis.

Wow.  I think this is the first time I'm actually used something I learned 
by sitting though those stupid Six Sigma training classes :-)


From onurb at xiludom.gro  Tue Nov 14 05:12:01 2006
From: onurb at xiludom.gro (Bruno Desthuilliers)
Date: Tue, 14 Nov 2006 11:12:01 +0100
Subject: to  setattr or def setProp()
In-Reply-To: <1163485203.560900.286430@b28g2000cwb.googlegroups.com>
References: <1163485203.560900.286430@b28g2000cwb.googlegroups.com>
Message-ID: <45599673$0$11686$426a74cc@news.free.fr>

jm.suresh at no.spam.gmail.com wrote:
> I have a class for rectangle and it has two points in its __slots__ .
> However, we can derive a number of properties like width, height,
> centerPoint etc from these two points. Now, I want to be able to set
> and get these properties directly from the instances. I can either def
> __setattr__ , __getattr__ 

But this won't help with introspection...

> or I can define function for each property
> like setWidth(), setHeight() . Which one would be faster?

You mean faster performances or faster to implement ?

> I would
> prefer doing through __setattr__, __getattr__ because it makes the code
> more readable.

You mean the client code ?

> However, speed is a concern I would have to do these operations in few
> thousand iterations for about 50-100 rectangles.
> 

The canonical solution is to use either properties or custom
descriptors[1]. Custom descriptors should be a bit faster than
properties (since you save a couple function calls), but I have not done
any benchmark... It should also be a bit faster than __getattr__, which
is only used as a fallback when all other lookup rules have failed (here
again, don't take me on words and do some benchmarking). As a last
point, descriptors show up as class and instance attributes, which helps
with introspection.


class Height(object):
  def __get__(self, instance, cls):
    if instance is None: return self
    return instance.bottomright.y - instance.topleft.y

 def __set__(self, instance, value):
    instance.bottomright.y = instance.topleft.y + value

class Width(object):
  def __get__(self, instance, cls):
    if instance is None: return self
    return instance.bottomright.x - instance.topleft.x

 def __set__(self, instance, value):
    instance.bottomright.x = instance.topleft.x + value

class Rectangle(object):
   def __init__(self):
     self.topleft = Point(10, 10)
     self.bottomright = Point(20, 30)

   height = Height()
   width = Width()

r = Rectangle()
r.with = 40

(not tested)

[1] :
 * http://docs.python.org/ref/descriptors.html
 * http://users.rcn.com/python/download/Descriptor.htm


My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From peter.maas at utilog.de  Mon Nov 13 17:03:55 2006
From: peter.maas at utilog.de (Peter Maas)
Date: Mon, 13 Nov 2006 23:03:55 +0100
Subject: explicit self revisited
In-Reply-To: <pan.2006.11.12.02.42.17.839194@REMOVE.THIS.cybersource.com.au>
References: <ej5fuv$a4a$1@online.de>
	<pan.2006.11.12.02.42.17.839194@REMOVE.THIS.cybersource.com.au>
Message-ID: <ejaq4b$56h$1@online.de>

Steven D'Aprano schrieb:
> Implicit self will never be used for Python, because it is redundant so
> long as there is a need for explicit self, and there is a need for
> explicit self because there are a number of basic, dare I say
> *fundamental* programming techniques that require an explicit self.
> 
> For example, delegation.
> 
> class MyClass(Parent):
>     def method(self, arg):
>         Parent.method(self, arg)
>         # what are you going to write? Parent.method(,arg) maybe?

The idea is: let self (or self.) be represented by the dot alone,
therefore:

Parent.method(., arg) # :)

> Here's another fundamental technique that implicit self breaks.
> 
> class MyList(list):
>     def __iadd__(self, other):
>         # in-place addition
>         other = transform(other) # do something to the argument
>         super(MyList, self).__iadd__(other) # call the superclass
>         # could be written .__class__.__iadd__(other)
>         # BUT be aware the semantics are NOT the same!
>         return self  # and return the suitably modified instance

return .

> You can't explicitly return the instance unless you have an explicit name
> for it. (And if you are thinking of creating more magic syntax that
> implicitly returns self, just don't bother.)

No magic. Just a dot. But perhaps a dot is too tiny. We could take JUST_ME
or ME_AND_BOBBY_MCGEE instead, of course as a reserved keyword followed by a
dot ;)

Thanks for your hints, Steven.

--
Regards/Gruesse,

Peter Maas, Aachen
E-mail 'cGV0ZXIubWFhc0B1dGlsb2cuZGU=\n'.decode('base64')


From gabrielg_laburando at yahoo.com.ar  Mon Nov 13 00:15:51 2006
From: gabrielg_laburando at yahoo.com.ar (Gabriel G)
Date: Mon, 13 Nov 2006 02:15:51 -0300
Subject: how do i map this?
In-Reply-To: <1163393708.532194.250580@k70g2000cwa.googlegroups.com>
References: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
	<mailman.34.1163391109.32031.python-list@python.org>
	<1163393708.532194.250580@k70g2000cwa.googlegroups.com>
Message-ID: <7.0.1.0.0.20061113021016.01d6d570@yahoo.com.ar>

At Monday 13/11/2006 01:55, John Machin wrote:

>Ben Finney wrote:
> > "ronrsr" <ronrsr at gmail.com> writes:
> >
> > > #row is a dictionary with keys: zid, keywords, citation, quotation
> > > def print_row(row):
> > >    print """<tr>
> > >       [...]
> > >       """
> >
> > You're printing a string, and never using that 'row' parameter.
>
>If that is so, why is he getting that message "TypeError: format
>requires a mapping"?

Apparently the posted code doesn't match the actual code. If that 
print_row() matched the stack trace, should say % row at the end.
Perhaps there is another function print_row?
Or you cut something from the end?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From daigno at gmail.com  Thu Nov 16 16:46:05 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Thu, 16 Nov 2006 16:46:05 -0500
Subject: Question about unreasonable slowness
Message-ID: <455CDC1D.8010800@gmail.com>

[ Warning: I'm new to Python.  Don't know it at all really yet, but had
to examine some 3rd party code because of performance problems with it.
]

Here's a code snippet:

i = 0
while (i < 20):
  i = i + 1
  (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")  # for testing, the
spawned shell does nothing
  print 'next'
#  for line in shellOut:
#       print line

On my system (AIX 5.1 if it matters, with Python 2.4.3), this simple
loop spawning 20 subshells takes .75 sec.  Ok, that's reasonable.  Now,
if I uncomment the two commented lines, which loop over the empty
shellOut array, the progam now takes 11 secs.   That slowdown seems
very hard to believe.  Why should it slow down so much?

John.
---
Tried it on my comp (battered up winXP laptop on it's last breath) with the following change...

  (shellIn, shellOut) = os.popen4("cmd ")

and the performance with or without the inserted for loop is roughly equivalent albeit a /bit/ slower with  the for loop is  but I would need timers really make it stand out (under 1 second difference).

All in all, rough estimation is that both take more or less 4 seconds to complete which is what I would expect knowing my system...

Anyways, is what I got...

Hope it helps somehow

?ric :D.




From larry.bates at websafe.com  Tue Nov 28 12:34:19 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Nov 2006 11:34:19 -0600
Subject: SPE (Stani's Python Editor) web site?
In-Reply-To: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
References: <nqrom21b0pip66t88do4l4kcqi3fcq3i17@4ax.com>
Message-ID: <456C731B.50803@websafe.com>

John DeRosa wrote:
> SPE's site (http://pythonide.stani.be/) has been inaccessible to me
> for at least a day.  Can anyone else get to it?
> 
> I looked on Google and didn't see any new locations for SPE.  Has it
> recently moved to somewhere else?  I dimly recall a post by Stani
> wherein he said he might move the site, but I can't find it...
> 
> John

DNS resolves to 205.234.199.58, but homepage never loads and I get
a Proxy Error in browser.

FYI, Larry


From pierre at saiph.com  Sun Nov 19 07:11:13 2006
From: pierre at saiph.com (Imbaud Pierre)
Date: Sun, 19 Nov 2006 13:11:13 +0100
Subject: tempfile.NamedTemporaryFile wont work
Message-ID: <456049ca$0$4692$426a74cc@news.free.fr>

On suse 9.3, tempfile.NamedTemporaryFile() doesnt work as expected.
(I found a permanent workaround, so I dont ask for help)
I expected to write to a file, and access it thru a shell command.
This code, in a loop:
             tf = tempfile.NamedTemporaryFile()
             tfName = tf.name
             #tf.seek(0)                  # rewind the file
             tf.write(chunk); tf.flush()
             print >> sys.stderr, '%s: %s' % (tfName, ['no', 
'yes'][os.path.exists(tfName)])
             subprocess.Popen(['strings', tfName])

Symptom: the file does not always exist, after the call to
NamedTemporaryFile(). Or at least its not seen by the strings command,
or by os.path.exists.

I guess the bug is pretty much os dependent, or even filesystem
dependent (Im on reiserfs). Maybe the os is buggy, maybe, somehow, the
python interface. Or did I miss something?
Shame, I didnt even try to check for a python bug tracker.


From aahz at pythoncraft.com  Sat Nov 25 11:19:56 2006
From: aahz at pythoncraft.com (Aahz)
Date: 25 Nov 2006 08:19:56 -0800
Subject: Simple threading
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
	<mailman.704.1164434215.32031.python-list@python.org>
	<12mgkd6e5cp5l16@corp.supernews.com>
Message-ID: <ek9qfc$mai$1@panix3.panix.com>

In article <12mgkd6e5cp5l16 at corp.supernews.com>,
Grant Edwards  <grante at visi.com> wrote:
>
>Re-binding a name is always an atomic operation.  Modifying
>many mutable objects is atomic.

You know this, but just to make clear: rebinding attributes of an object
(which are also sometimes called names) is not necessarily an atomic
operation.  Moreover, only a plain rebinding operation is atomic;
augmented assignment is frequently not atomic.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From timothy at open-networks.net  Thu Nov 16 06:37:42 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 16 Nov 2006 21:37:42 +1000
Subject: Secure Python
In-Reply-To: <mailman.228.1163664606.32031.python-list@python.org>
References: <mailman.219.1163646863.32031.python-list@python.org>	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>	<455c1665@quokka.wn.com.au>
	<mailman.228.1163664606.32031.python-list@python.org>
Message-ID: <455c4d07@quokka.wn.com.au>

Fredrik Lundh wrote:
> timmy wrote:
> 
>> congraulations you have discovered loops and their misuse
> 
> 
> if you don't know what the phrase "denial of service attack" means, you 
> can always google for it.
> 
> </F>
> 
maybe you should google "linux kernel limit" and you can prevent any 
user/process maxing out your system


From aahz at pythoncraft.com  Tue Nov 28 20:09:39 2006
From: aahz at pythoncraft.com (Aahz)
Date: 28 Nov 2006 17:09:39 -0800
Subject: why would anyone use python when java is there?
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
Message-ID: <ekimkj$7k8$1@panix3.panix.com>

In article <1164762232.220759.57160 at h54g2000cwb.googlegroups.com>,
gavino <bootiack at yahoo.com> wrote:
>
>wtf

Because programming in Python makes me feel happy and contented, while
programming in Java just makes me want to scream in agony.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Usenet is not a democracy.  It is a weird cross between an anarchy and a
dictatorship.


From e0427417 at student.tuwien.ac.at  Tue Nov 21 16:58:22 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Tue, 21 Nov 2006 22:58:22 +0100
Subject: Is there a list comprehension for this?
In-Reply-To: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
Message-ID: <45637619$0$12642$3b214f66@tunews.univie.ac.at>

liam_herron wrote:
> Given:
> dw = [ 1, -1.1, +1.2 ]
> 
> Suppose I want to create a list 'w' that is defined as
> 
> w[0] = dw[0],
> w[1] = w[0] + dw[1],
> w[2] = w[1] + dw[2]
> 
> Is there a list comprehension or map expression to do it in one or 2
> lines.
> 


Is this a function where you just want to know a w[n]?

then:

def w(n):
	return sum((1 + i * 0.1) * (i % 2 and 1 or -1) for i in xrange(n))


otherwise:

n, w, x = 3, [], 0

for y in ((1 + i * 0.1) * (i % 2 and 1 or -1) for i in xrange(n)):
	x += y
	w.append(x)


From kibleur.christophe at gmail.com  Mon Nov  6 07:47:13 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 6 Nov 2006 04:47:13 -0800
Subject: ANN: PyQt v4.1 Released
In-Reply-To: <mailman.1792.1162765383.11739.python-list@python.org>
References: <mailman.1783.1162733817.11739.python-list@python.org>
	<1162749608.733730.321970@k70g2000cwa.googlegroups.com>
	<mailman.1792.1162765383.11739.python-list@python.org>
Message-ID: <1162817233.695765.22780@b28g2000cwb.googlegroups.com>

Hi Phil,
I followed the docs to build qscintilla2, all is going well with no
errors, but when I launched the PyQt Syntax Highlighter Example,
nothing is highlighted but the first line of text, whereas the C++
sample works well in the demo.
Any hints ?
Thanks.



From steve at REMOVE.THIS.cybersource.com.au  Mon Nov  6 05:43:13 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 06 Nov 2006 21:43:13 +1100
Subject: simple way to un-nest (flatten?) list
References: <9Ws3h.47668$r61.11004@text.news.blueyonder.co.uk>
Message-ID: <pan.2006.11.06.10.43.12.77229@REMOVE.THIS.cybersource.com.au>

On Sun, 05 Nov 2006 21:43:33 +0000, djc wrote:

> There is I am sure an easy way to do this, but I seem to be brain dead 
> tonight. So:
> 
> I have a table such that I can do
> 
>   [line for line  in table if line[7]=='JDOC']
> and
>   [line for line  in table if line[7]=='Aslib']
> and
>   [line for line  in table if line[7]=='ASLIB']
> etc
> 
> I also have a dictionary
>   r=  {'a':('ASLIB','Aslib'),'j':('JDOC', 'jdoc')}
> so I can extract values
> r.values()
> [('ASLIB', 'Aslib'), ('JDOC', 'jdoc')]
> 
> I would like to do
> 
> [line for line  in table if line[7] in ('JDOC','jdoc','Aslib','ASLIB')]

What is the purpose of the "if line[7]" bit?



> so how should I get from
> {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
> to
> ('Aslib','ASLIB','JDOC','jdoc')


Assuming you don't care what order the strings are in:

r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
result = sum(r.values(), ())

If you do care about the order:

r = {'a':('ASLIB','Aslib'),'j':('JDOC','jdoc')}
keys = r.keys()
keys.sort()
result = []
for key in keys:
    result.extend(r[key])
result = tuple(result)


-- 
Steven.



From steve at holdenweb.com  Mon Nov 13 04:42:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 03:42:53 -0600
Subject: reduce to be removed?
In-Reply-To: <1163314554.972785.175860@h48g2000cwc.googlegroups.com>
References: <1163283012.372607.185510@m73g2000cwd.googlegroups.com>	<mailman.2111.1163283905.11739.python-list@python.org>	<1163285443.536672.289940@m73g2000cwd.googlegroups.com>
	<1163314554.972785.175860@h48g2000cwc.googlegroups.com>
Message-ID: <ej9ekk$e23$1@sea.gmane.org>

Paddy wrote:
> Dustan wrote:
> 
>> Anyway, I figured out a way to get the builtin
>> function 'sum' to work as I need:
>> sum([[1,2,3],[4,5,6],[7,8,9]],  [])
>>
> 
> Hah!
> No-one expects sum to be used on anything but numbers.
> 
> Except lists as above.
> 
> No-one expects sum to be used on anything but numbers, and maybe lists
> too.
> 
> ;-)
[voice mumbles:] "What about tuples"

Right, tuples too. But apart from tuples and lists, nobody expects sum 
to be used on anything but numbers.

In actual fact when Alex Martelli introduced sum() he intended it to be 
polymorphic over all the container types including strings. The check to 
exclude the string case was added when it was determined that it was 
terribly inefficient to concatenate strings that way. the same may well 
apply to other sequences.

I suppose it's only a matter of time before someone wants to define 
dict.__add__ ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From robert.kern at gmail.com  Fri Nov 17 13:57:31 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Nov 2006 12:57:31 -0600
Subject: What python modules are available?
In-Reply-To: <f4cc03640611171050i791c8496sa6c7712161e7f4c1@mail.gmail.com>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>	<mailman.334.1163766357.32031.python-list@python.org>	<1163767023.599564.260920@m7g2000cwm.googlegroups.com>	<ejkvqh$d4i$2@sea.gmane.org>
	<f4cc03640611171050i791c8496sa6c7712161e7f4c1@mail.gmail.com>
Message-ID: <ejl0n9$go1$1@sea.gmane.org>

km wrote:
> Hi all,
> 
> Thats ridiculous! why is that the numpy implementation documentation is
> put on sale  and not available freely  to everyone?

  http://www.tramy.us/FAQ.html

In brief, because otherwise there wouldn't be any complete documentation. With
all due respect to the Numeric manual's authors, it was never complete and
occasionally inaccurate over its lifetime. Time is not free.

On the other hand, if you are willing to put your time where your demanding
mouth is, the community would appreciate your efforts in expanding the freely
available documentation:

  http://www.scipy.org/Documentation

-- 
Robert Kern

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



From mytempmailid at gmail.com  Thu Nov 16 20:33:59 2006
From: mytempmailid at gmail.com (PS)
Date: Thu, 16 Nov 2006 17:33:59 -0800
Subject: Printing/writing an integer to a file
Message-ID: <220f22820611161733w7db0d3a0mb53d888cd704dbc4@mail.gmail.com>

Friends,

I am new to python and did search on the web on how to achieve this:
( I am trying to append the line numbers to all the lines of a file for now)

Thanks!!

=================================================
import os, sys

fileName = os.path.join("C:", "temp", "x1.txt")
fileobject = open(fileName, 'r')
outputDir = "C://temp//"
linenumber = 0
fileName1 = outputDir + "x2.txt"
fileobject1 = open(fileName1, 'w')
while (1):
    L = fileobject.readline()
    if L=="":
        print "**Done"
        break
    linenumber += 1
    fileobject1.write(ln)
    fileobject1.write(":: "+ L)

fileobject1.close()
=============================================================

-- 
Regards,
Prem
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From fang.fang2003 at gmail.com  Thu Nov 30 12:17:01 2006
From: fang.fang2003 at gmail.com (Grace Fang)
Date: 30 Nov 2006 09:17:01 -0800
Subject: extremely slow array indexing?
Message-ID: <1164907021.765969.129280@80g2000cwy.googlegroups.com>

Hi,

I am writing code to sort the columns according to the sum of each
column. The dataset is huge (50k rows x 300k cols), so i need to read
line by line and do the summation to avoid the out-of-memory problem.
But I don't know why it runs very slow, and part of the code is as
follows. I suspect it's because of array index, but not sure. Can
anyone
point out what needs to be modified to make it run fast? thanks in
advance!

...
from numpy import *
...

       currSum = zeros(self.componentcount)
       currRow = zeros(self.componentcount)
       for featureDict in self.featureDictList:
           currRow[:] = 0
           for components in self.componentdict1:
               if featureDict.has_key(components):
                   col = self.componentdict1[components]
                   value = featureDict[components]
                   currRow[col]=value;
           currSum = currSum + row;
...



From nick at craig-wood.com  Fri Nov 17 11:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 17 Nov 2006 10:30:04 -0600
Subject: pyserial port connection problem
References: <1163764748.744393.130660@m7g2000cwm.googlegroups.com>
Message-ID: <slrnelrmc8.l3j.nick@irishsea.home.craig-wood.com>

Jon <jspeis at gmail.com> wrote:
>  I wrote some code to read in info from a port using pyserial. the code
>  reads info sent by a box that is connected to my computer by an
>  rs232-to usb adapter. When I was writing the code and testing it on my
>  computer it worked fine.
>  I ran py2exe on the program (which uses wxpython for its gui) and sent
>  the output from the py2exe to another computer. now when I try to run
>  it on this other computer it fails to open the port. it gives the error
>  that it cannot createfile. the code I'm using to connect is the same as
>  it is when it worked on my computer.
>  I do notice that pyserial sees this port on the other computer as
>  \\\\.\\COM14 - while windows device manager displays it as COM14.

That is a bit too many backslashes... You can only directly open COM1
to COM9 under windows.  If you have >= 10 COM ports you need to use
the \\.\COM14 syntax.  It looks like your backslashes have been
doubled somewhere along the line, though this maybe be a printing
artifact.

Are you passing the port name into pyserial or allowing the user to
choose it, or just getting pyserial to choose the n-th port?

Also are you running as adminstrator?  You may need admin rights to
open a serial port under windows (I'm not sure).

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


From rtw at freenet.co.uk  Sun Nov  5 14:48:57 2006
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sun, 05 Nov 2006 13:48:57 -0600
Subject: How to get/read Hard disk label / drive label
References: <1162752076.121514.313750@h48g2000cwc.googlegroups.com>
Message-ID: <Xns9872C99CA5F47rtwfreenetREMOVEcouk@216.196.109.145>

Praveen wrote in news:1162752076.121514.313750
@h48g2000cwc.googlegroups.com in comp.lang.python:

> I want to read individual disk label
> 
> for Hard disk (C: drive, D: drive disk label)
> and
> CD-ROM disk label
> 
> Please provide some pointer to the code or document.
> 

You could use:

<url: 
http://aspn.activestate.com/ASPN/docs/ActivePython/2.2/PyWin32/win32api__
GetVolumeInformation_meth.html>

which will require:

http://sourceforge.net/projects/pywin32/

Or you can use this:

http://windowssdk.msdn.microsoft.com/en-us/library/ms685899.aspx

with this:

http://docs.python.org/dev/lib/module-ctypes.html

which is built in to python 2.5

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From shansen at advpubtech.com  Thu Nov 23 18:25:35 2006
From: shansen at advpubtech.com (Stephen Hansen)
Date: Thu, 23 Nov 2006 15:25:35 -0800
Subject: The Python Papers Edition One
In-Reply-To: <1164323350.988946.209350@l12g2000cwl.googlegroups.com>
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
Message-ID: <7a9c25c20611231525r1033ab38ydc70a9f893bac1c@mail.gmail.com>

> Perhaps people could comment on the following proposition -- if an
> organisation is Not for Profit, its dealings are therefore
> Noncommercial?


I think the problem is Python has historically been so very free-- It has
always been *extremely* Business-Friendly, and totally lacks ... ah, the
moral opposition to how a closed-source business wants to run their own
lives. :)

Consider this: my company is makes a product written mostly in Python. It's
commercial and closed-source. If content from the papers ended up in the
python documentation website, it might just end up in the Python docs
themselves....

And I distribute python for commercial purposes :) As do a lot of people...
therefore, everything in the python distribution-- code, docs, etc-- has to
be able to be distributed for commercial purposes.

I am SO not a lawyer. But remember, the Python-developers and Python.org are
not the only people who "distribute" Python and what's in it... I do too.
Others do too. So nothing can end up in Python that I can't freely
distribute.

That's not to say they couldn't link to your content and not-include it in
any downloads or anything. Then it'd be available to anyone on-the-website
and such.

Also it's not saying you SHOULD change your license. I don't know if a
journal and its articles would be the kind of thing that WOULD make it into
core-Python-documentation in general... It's articles-- possibly interesting
and useful ones, but docs tend to be more referency... and if it would make
it into the docs? You can always relicense anything you hold :)

--Ix
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From allenjo5 at mail.northgrum.com  Tue Nov 21 15:22:06 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 21 Nov 2006 12:22:06 -0800
Subject: Question about unreasonable slowness
In-Reply-To: <1164126305.682178.207780@j44g2000cwa.googlegroups.com>
References: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>
	<455ce05a$0$5794$4d3efbfe@news.sover.net>
	<1163773005.201111.175020@f16g2000cwb.googlegroups.com>
	<mailman.347.1163778501.32031.python-list@python.org>
	<1163795956.923263.200590@e3g2000cwe.googlegroups.com>
	<Tsydnegq7KP-tv_YnZ2dnUVZ_rGdnZ2d@99main.com>
	<1164126305.682178.207780@j44g2000cwa.googlegroups.com>
Message-ID: <1164140526.333378.168260@j44g2000cwa.googlegroups.com>


allenjo5 at mail.northgrum.com wrote:
> James Antill wrote:
> > On Fri, 17 Nov 2006 12:39:16 -0800, allenjo5 wrote:
> >
> > >> allenjo5 at mail.northgrum.com:
> > >> > Ok, I built Python 2.5 (same AIX 5.1 machine).  With the "for line in
> > >> > shellOut" loop in, it now takes "only" 7 secs instead of the 11 secs in
> > >> > python 2.4.3.   So, that's better, but still unreasonably slow.  And to
> > >> > answer another's question, I'm using the ksh builtin 'time' command to
> > >> > time the overall script.
> > >> >
> > >> > BTW, I don't think the AIX /bin/sh (actually ksh) is inherently slow.
> > >> > This naively translated pure shell version of my python test script
> > >> > completes in .1 secs:
> > >> >
> > >> > i=1
> > >> > while ((i<20))
> > >> > do ((i+=1))
> > >> >    print next
> > >> >    print "$shellIn" | /bin/sh -c ':' |
> > >> >            while read line
> > >> >            do print $line
> > >> >            done
> > >> > done
> > >>
> > > Yeah, apparently this is an AIX specific issue - perhaps the python
> > > implementation of popen4() needs to do something special for AIX?
> >
> >  This seems likely a more general issue, rather than just a python issue
> > (although the huge speed up from moving to 2.5.x). A
> > couple of things I'd try:
>
> With help from c.u.aix, I've discovered the problem.  Python (in
> popen2.py) is attempting to close filedescriptors 3 through 32767
> before running the /bin/sh.   This is because os.sysconf('SC_OPEN_MAX')
> is returning 32767.   So far, it looks like SC_OPEN_MAX is being set
> correctly to 4 in posixmodule.c, and indeed, os.sysconf_names seems to
> also have SC_OPEN_MAX set to 4:
>
> python -c 'import os;  print os.sysconf_names'
>
> ...
> 'SC_XOPEN_XCU_VERSION': 109, 'SC_OPEN_MAX': 4, 'SC_PRIORITIZED_IO': 91,
> ...
>
> In fact, none of the values that sysconf_names has set for the various
> constants are being returned by os.sysconf().  For example, the 2
> others I just listed:
>
> $ ./python -c 'import os; print os.sysconf("SC_XOPEN_XCU_VERSION")'
> 4
>
> $ ./python -c 'import os; print os.sysconf("SC_PRIORITIZED_IO")'
> -1
>
> This makes no sense to me... unless there is some memory alignment or
> endian issue going on here?

More info: clearly I had no idea what I was talking about :-)

The numbers associated with the names returned by os.sysconf_names are
the indices to an array that the C sysconf() function uses to return
the value of the name.   So, the fact that os.sysconf("SC_OPEN_MAX")
was returning 32767 on AIX is correct.   However, the slowness this
causes is still an issue.   This is because python is closing all these
file descriptors in python code, not C code - specifically, in
popen2.py:

try:
    MAXFD = os.sysconf('SC_OPEN_MAX')
except (AttributeError, ValueError):
    MAXFD = 256

...

    def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        for i in range(3, MAXFD):
            try:
                os.close(i)
            except OSError:
                pass
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1)


Any chance the "for i in range(3, MAXFD):" loop could be done in C
instead?  Even having, say, an os.rclose(x,y) low level function to
close all file descriptors in range [x,y] would be great.

John.



From struggle at mail.nankai.edu.cn  Mon Nov 20 03:07:11 2006
From: struggle at mail.nankai.edu.cn (Bo Yang)
Date: Mon, 20 Nov 2006 16:07:11 +0800
Subject: How to do multivolume zip in python?
Message-ID: <ejrpr3$ulf$1@news.cn99.com>

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

Hi
  Is there any python module to do with
multivolume zip?
  And with perl I can use CPAN to search
almost all modules, How can I find a module
in python efficiently?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFYWIv7tZp58UCwyMRAj0mAJ9PdMq3Y1VMcCX2FR6DmHipqR+8/gCfeaSD
mhPNFwd5zmO1DLoP4l6cJfY=
=IE69
-----END PGP SIGNATURE-----


From baitelli at cepel.br  Tue Nov 21 14:47:43 2006
From: baitelli at cepel.br (baitelli)
Date: Tue, 21 Nov 2006 19:47:43 -0000
Subject: pwinauto to remote automate a GUI ?
Message-ID: <LMEAJIHHELFLLHCEONBGKEBHCNAA.baitelli@cepel.br>

Hi!

pywinauto is a set of python modules to automate the Microsoft Windows GUI.
With the lines below we start and atomates the apllication Notepad:
 
from pywinauto import application
app = application.Application()
app.start('C:\Notepad.exe')
 ... pywinauto automation code

Question: Is it possible to start and automate a remote GUI using Python?

baitelli,r.

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From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 18 18:21:10 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 19 Nov 2006 10:21:10 +1100
Subject: decompiler
References: <1163864577.987875.64990@m7g2000cwm.googlegroups.com>
Message-ID: <pan.2006.11.18.23.21.10.234727@REMOVE.THIS.cybersource.com.au>

On Sat, 18 Nov 2006 07:42:58 -0800, jim wrote:

> where can I find a free decompile that I can run in windows xp

Here:

http://catb.org/esr/faqs/smart-questions.html



-- 
Steven.



From gagsl-py at yahoo.com.ar  Mon Nov 13 21:36:36 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 23:36:36 -0300
Subject: Unpacking sequences and keywords in one function call
In-Reply-To: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
References: <1163466377.919531.113560@h54g2000cwb.googlegroups.com>
Message-ID: <7.0.1.0.0.20061113233121.039dcc38@yahoo.com.ar>

At Monday 13/11/2006 22:06, ram wrote:


>Stupid question #983098403:
>
>I can't seem to pass an unpacked sequence and keyword arguments to a
>function at the same time. What am I doing wrong?
>
>def f(*args, **kw):
>     for a in args:
>         print 'arg:', a
>     for (k,v) in kw.iteritems():
>         print k, '=', v
>
> >>> f(1,2)
>arg: 1
>arg: 2
>
> >>> f(*[1,2])
>arg: 1
>arg: 2
>
> >>> f(1,2, a=1)
>arg: 1
>arg: 2
>a = 1
>
> >>> f(*[1,2], a=1)
>     File "<stdin>", line 1
>       f(*[1,2], a=1)
>                   ^
>     SyntaxError: invalid syntax

Reverse the order:

f(a=1, *[1,2])


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From kinch1967 at gmail.com  Tue Nov 28 21:55:57 2006
From: kinch1967 at gmail.com (bullockbefriending bard)
Date: 28 Nov 2006 18:55:57 -0800
Subject: 6 Pick Bet Grouping
Message-ID: <1164768957.528355.210070@16g2000cwy.googlegroups.com>

(I apologise in advance for posting something slightly OT, but plead in
mitigation that I'm trying to re-write an old, suboptimal VB6 (erk)
brute-force attack in a shiny, elegant, pythonic manner. I would really
appreciate some ideas about an appropriate algorithmic approach to this
+ pointers to any relevant implementations in Python. Along the way,
I'm also trying to get Python into my organisation through the back
door - so a further plea for tolerance in posting this here! :))

A single 6 Pick bet looks like this:
RACE1    RACE2    RACE3    RACE4    RACE5   RACE6
runner1 / runner 2 / runner 3 / runner4 / runner5 / runner6  - $amount

e.g. we might have:

5 / 3 / 11 / 7 / 1 / 9  - $50  (5 to come 1st or 2nd in Race1, 3 to
come first or 2nd in Race 2, etc.)
7 / 3 / 11 / 7 / 1 / 9  - $50
5 / 3 / 11 / 14 / 1 / 9  - $50
7 / 3 / 11 / 14 / 1 / 9  - $50

The totalizator system allows us to merge or group these four bets as
follows:

5 + 7 / 3 / 11 / 7 + 14 / 1 / 9 - $50  ($200 total)

This method of expressing multiple bets in one line is advantageous
because we may have many thousands of combinations we wish to bet and
only a limited amount of time in which to bet them.

There are up to 14 horses in each race, so 7,529,536 possible 6 Pick
bets. In practice, one might wish to bet (say)15,000 combinations out
of these 7.5 million. However, it would be very nice to be able to
*optimally* merge (as shown above) these 15,000 combinations so that
they might fit on (say)  2,000 betting tickets instead of trying to
write out 15,000 single tickets.

To keep things simple, let's assume that all single bets are for the
same amount. (In practice, however, this is not so.)

Now, it's certainly possible to go about this via brute force
iteration, but I would really appreciate it if anyone with a CS
background could point me toward a smarter plan of attack. I have
perused Skiena's Algorithm Handbook and various websites and can't seem
to find an analogous problem. I'm hoping this is just my ignorance and
that my brief exposition rings a bell for someone here.



From mike at hobbshouse.org  Mon Nov 13 12:20:12 2006
From: mike at hobbshouse.org (Michael Hobbs)
Date: Mon, 13 Nov 2006 11:20:12 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <pan.2006.11.11.01.09.34.138815@REMOVE.THIS.cybersource.com.au>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>
	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>
	<ej2igj$826$1@sea.gmane.org>	<4554D416.70408@hobbshouse.org>
	<ej2pa2$vpq$1@sea.gmane.org>	<mailman.2070.1163193541.11739.python-list@python.org>
	<pan.2006.11.11.01.09.34.138815@REMOVE.THIS.cybersource.com.au>
Message-ID: <4558A94C.9040002@hobbshouse.org>

Steven D'Aprano wrote:
> On Fri, 10 Nov 2006 15:18:55 -0600, Michael Hobbs wrote:
>
>   
>> Ron Adam wrote:
>>     
>>> It is also an outline form that frequently used in written languages.  Something 
>>> python tries to do, is to be readable as if it were written in plain language 
>>> where it is practical to do so.  So the colon/outline form makes a certain sense 
>>> in that case as well.
>>>   
>>>       
>> That is perhaps the most convincing argument that I've heard so far. 
>> Indeed, I often find myself writing out colons when writing pseudo-code 
>> out on paper. The reason, however, is usually because my indents don't 
>> quite line up as perfectly on paper as they do in an editor. The colons 
>> provide a form of backup separation for when my columns start to get 
>> sloppy. (Natural language is actually filled with such redundancies in 
>> order to compensate for sloppy handwriting.)
>>     
>
> Er, natural language pre-dates handwriting by many tens or hundreds of
> thousands of years. The redundancy of natural language has many reasons,
> but compensating for sloppy handwriting is not one of them.  
I was using the term "natural language" in a wider sense, as in spoken 
languages, unspoken languages (sign languages), and writing systems. As 
far redundancies in writing systems go, it has been estimated that there 
is ~50% redundancy in the characters alone. That is, you can usually 
determine what a character is even when half of its strokes are removed. 
That's not even considering other redundancies such as using a phonetic 
alphabet vs. ideographs, or writing the vowels between consonants, which 
only started with the Greek alphabet.

>> This backup function 
>> obviously isn't needed when a computer is taking care of the layout.
>>     
>
> That word you use, "obviously", I don't think it means what you think it
> means. There's nothing obvious about your conclusion to me.
>
> while (this really long expression
>     (which extends over multiple lines
>     and contains many statements)
>     some of which (like this one) contain
>     nested bracketed terms such as (this
>     expression here) but like all good 
>     things) it eventually ends
>     and we can get to the business
>     of executing the while-block
>
> Compare that to the version with a colon:
>
> while (this really long expression
>     (which extends over multiple lines
>     and contains many statements)
>     some of which (like this one) contain
>     nested bracketed terms such as (this
>     expression here) but like all good 
>     things) it eventually ends:
>     and we can get to the business
>     of executing the while-block
>
>
> Arguably, the parser might not find the first version any more difficult
> than the second, but I know which one I'd rather read.  
I'd rather read neither. Both of them are obviously illegible. As the 
saying goes, you can write FORTRAN code in any language. That is, no 
language, no matter what its parsing rules, can prevent you from writing 
illegible code if you're determined to do so. To me, the second example 
is no more legible simply because it contains a colon somewhere. Proper 
style would dictate that you make some form of obvious break when 
writing a multi-line conditional, no matter which language you're using. 
Some possibilities:

while (this really long expression
    (which extends over multiple lines
    and contains many statements)
    some of which (like this one) contain
    nested bracketed terms such as (this
    expression here) but like all good 
    things) it eventually ends:

    and we can get to the business
    of executing the while-block


or

while (this really long expression
    (which extends over multiple lines
    and contains many statements)
    some of which (like this one) contain
    nested bracketed terms such as (this
    expression here) but like all good 
    things) it eventually ends:
        and we can get to the business
        of executing the while-block


or

while (this really long expression
    (which extends over multiple lines
    and contains many statements)
    some of which (like this one) contain
    nested bracketed terms such as (this
    expression here) but like all good 
    things) it eventually ends:
    #### BODY ####
    and we can get to the business
    of executing the while-block


>> My final argument against the colons is to simply try programming in 
>> Ruby for a while and then come back to Python. I think you'll find that 
>> programming without the colons just simply feels more "natural".
>>     
>
> And maybe you're even correct. But one major reason of using the colon is
> to make it easier for _inexperienced_ programmers. Your suggestion that
> programming in Ruby for a while should be a prerequisite for making Python
> easy to read is an interesting one, but not one that many people will
> agree with. *wink*  
Is Python a cult, where it's considered dangerous to experience the 
outside world out of fear that it may corrupt your mind and make you 
question all sorts of long-standing edicts?

If you're concerned about coddling inexperienced programmers, maybe you 
should join Java cult. I hear that it is much more "safe" ;-)

- Mike



From gagsl-py at yahoo.com.ar  Tue Nov  7 17:09:32 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 07 Nov 2006 19:09:32 -0300
Subject: C wrapper
In-Reply-To: <1162932189.315088.58420@m7g2000cwm.googlegroups.com>
References: <1162928252.643092.23350@h48g2000cwc.googlegroups.com>
	<dG54h.6600$736.3574@newsfe16.phx>
	<1162930226.658619.79830@m73g2000cwd.googlegroups.com>
	<mailman.1851.1162931420.11739.python-list@python.org>
	<1162932189.315088.58420@m7g2000cwm.googlegroups.com>
Message-ID: <7.0.1.0.0.20061107184948.03f3de38@yahoo.com.ar>

At Tuesday 7/11/2006 17:43, Sheldon wrote:

> > And what are those non-static functions used for? The *only* purpose
> > of your module should be to provide the Python bindings...
>
>I wrote the C module to do some number crunching. Now I just need to
>"connect" it to my python program. Should the initmsgpps_functions() be
>the only function in the file? Then how do I "connect" my C module to
>my Python program?

Read again the docs but have in mind that you are *extending* the 
interpreter with a new module - disregard the references to 
*embedding* Python (even if they appear in a section about 
extending!). I can see your confusion reading 
http://docs.python.org/ext/methodTable.html

That is, you *don't* write a main() function, and you *don't* invoke 
Py_Initialize; just write your initXXX() function.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From ananyablr at gmail.com  Tue Nov 21 05:07:36 2006
From: ananyablr at gmail.com (comp.lang.python)
Date: 21 Nov 2006 02:07:36 -0800
Subject: how to call user defined TCL procedures from python script?
Message-ID: <1164103655.930495.306850@h48g2000cwc.googlegroups.com>

Hi,
 I am using some TCL driver APIs and user define TCL function to
control a traffic generator. The APIs are the traffic generator's
specific and in built to the driver library.

The issue is calling API and user define TCL functions from python
script.
I am looking for the way to include user define TCL lib to python
script and call those user define functions from python script.
thanks & regards
ananya



From nyamatongwe+thunder at gmail.com  Wed Nov  1 17:01:35 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Wed, 01 Nov 2006 22:01:35 GMT
Subject: uninstall and Windows file associations
In-Reply-To: <1162414083.490714.313860@e3g2000cwe.googlegroups.com>
References: <1162414083.490714.313860@e3g2000cwe.googlegroups.com>
Message-ID: <3P82h.57160$rP1.14468@news-server.bigpond.net.au>

Roger Miller:

> When I installed Python 2.5 (on Windows XP) I left 2.4 in place "just
> in case". Today I decided to remove it. However after doing so (from
> the control panel) I found that Windows no longer knows about the
> Python file types and associations. Is this behavior expected, 

    This is pretty much inevitable on Windows as there is no generic 
support to handle this sort of situation. Python could attempt to do its 
own special case handling (with a registered list of Python 
installations and an arbitration/repair phase in the uninstaller) but it 
would be a lot of work and quite fragile.

    Just reinstall your preferred version. You may want to check which 
extensions have been installed into Python so that they can also be 
reinstalled if needed.

    Neil


From desale at india.com  Wed Nov 22 23:52:18 2006
From: desale at india.com (sandip desale)
Date: Thu, 23 Nov 2006 12:52:18 +0800
Subject: Porting Tkinter application to JYthon
Message-ID: <20061123045218.BFAF8CA0A4@ws5-11.us4.outblaze.com>

Dear All,

We have a Tcl/Tk application written using Python 2.2. Using this application we want to call some customizable Java APIs. I tried porting Tcl/Tk application to Jython but not able to do the same as TKinter library is not available with JYthon. 

Can you please help me in porting Tkinter application to Jython? Also kindly let me know how to do the same.


Thanks & Regards,
Sandip Desale


-- 

Search for products and services at: 
http://search.mail.com


From fredrik at pythonware.com  Fri Nov 17 02:08:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 08:08:33 +0100
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163715688.959899.65990@h48g2000cwc.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>	<unvs24-8fi.ln1@lairds.us>	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<1163715688.959899.65990@h48g2000cwc.googlegroups.com>
Message-ID: <ejjn5g$r6g$1@sea.gmane.org>

sjdevnull at yahoo.com wrote:

> Huh?  I've been doing paid python web work since 2000.  I'm fairly sure
> that Yahoo! groups predates that by a while

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

</F>



From anton.vredegoor at gmail.com  Fri Nov 24 09:44:45 2006
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Fri, 24 Nov 2006 15:44:45 +0100
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <ek70g4$d56$1@news6.zwoll1.ov.home.nl>

Jim wrote:

> I have created an import module.  And would like to access a function
> from the main script, e.g.,
> 
> file abc.py:
> ###################
> def a():
>     m()
>     return None
> ####################
> 
> file main.py:
> #####################
> from abc import *
> def m():
>     print 'something'
>     return None
> 
> a()

import sys
def a():
     sys.modules['__main__'].m()
     return None

Anton

'now why would anyone want to do *that* ?'




From pavlovevidence at gmail.com  Mon Nov 27 10:21:17 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 27 Nov 2006 07:21:17 -0800
Subject: Inheritance from builtin list and override of methods.
References: <200611261804.54669.mgiann@beta-cae.gr>
	<mailman.740.1164559979.32031.python-list@python.org>
Message-ID: <1164640877.138870.206320@14g2000cws.googlegroups.com>

Fredrik Lundh wrote:
> Michalis Giannakidis wrote:
>
> > Could someone please explain the reasoning/behabiour of these?
>
> in general, methods on C objects are implemented in terms of operations
> on the internal data structures, not in terms of a subset of the methods
> already provided by the object.

True, and it's also true for many Python classes.  Here's a very silly
example:

class Cons(object):
    def __init__(self,car,cdr):
        self.car = car
        self.cdr = cdr
    def __getitem__(self,key):
        if key == "car":
            return self.car
        if key == "cdr":
            return self.cdr
        raise KeyError(key)
    def __getitem__(self,key,value):
        if key == "car":
            self.car = value
        if key == "cdr":
            self.cdr = value
        raise KeyError(key)
    def swap(self):
        self.car,self.cdr = self.cdr,self.car

So hooking into __getitem__ and __setitem__ won't let you inpect the
swap operation.  It's much the same with lists: they bypass __getitem__
and __setitem__ and go directly to their internal.

OTOH, I've written a few C types that deliberately go though slower
Python methods to allow overriding.  But that has to be deliberate (for
the most part); as Frederick said, most C classes don't do that.


Carl Banks



From noah.rawlins at comcast.net  Sun Nov 19 19:59:45 2006
From: noah.rawlins at comcast.net (Noah Rawlins)
Date: Sun, 19 Nov 2006 19:59:45 -0500
Subject: re.match -- not greedy?
In-Reply-To: <1163981503.295521.7180@m7g2000cwm.googlegroups.com>
References: <mailman.476.1163979600.32031.python-list@python.org>
	<1163981503.295521.7180@m7g2000cwm.googlegroups.com>
Message-ID: <UZSdnaYSRdGdY_3YnZ2dnUVZ_o6dnZ2d@comcast.com>

Carl Banks wrote:
> EXI-Andrews, Jack wrote:
>> the '*' and '+' don't seem to be greedy.. they will consume less in
>> order to match a string:
>>
>>>>> import re;re.match('(a+)(ab)','aaab').groups()
>> ('aa', 'ab')
>>
>> this is the sort of behaviour i'd expect from
>>    '(a+?)(ab)'
>>
>> a+ should greedily consume a's at the expense of the string not matching
> 
> It's called backtracking.  If a match fails, the regexp engine
> recursively unwinds some of the greedy matching and tries again.
> 
>> in real life, i am trying to match #defines:
>>
>>>>> re.match( '#define ([A-Za-z0-9_]+)([^(])', '#define
>> abc(d)').groups()
>> ('ab', 'c')
>>
>> i want this example to fail because the first character after a string
>> of letters is a '('
>> i want to match only #defines without parameters.
> 
> Probably the easiest thing to do is to attempt to match zero or one
> opening parentheses, and bail out if it did end up matching the
> parenthesis.
> 
> m = re.match(r"#define ([A-Za-z0-9_]+)(\(?)","#define abc(d)")
> if m and m.groups(2) != "(":
>     ...
> 
> (BTW, it's good practice to use a raw strings for the regular
> expressions as I did.)
> 

Another way that seems clearer to me is to use negative lookahead 
assertions.

 >>>defPatt = re.compile(r'#define\s+(\w+)\b(?!\()')
 >>> defPatt.match("#define abc(x)")
 >>> defPatt.match("#define foo_BarBaz")
<_sre.SRE_Match object at 0xb7dd5820>
 >>> defPatt.match("#define foo_BarBaz").groups()
('foo_BarBaz',)

In general '\w' is the same as [A-Za-z0-9_]

There are other considerations too... I don't know if

#define abc (x)

But the main thing here is the use of '\b' to require there to be a word 
boundary at the end your match and a (?!\() to require that the match is 
not followed by a '('

see http://docs.python.org/lib/re-syntax.html

noah


>> so what's the definition of greedy?
> 
> It means match as much you can *while getting a match*.
> 
> Just remember regexp parsing is not a one way street: if it hits a dead
> end, it'll go back and try another path.  In fact, greediness usually
> doesn't affect *whether* a regexp matches; it only affects the
> groupings.  I'm suddenly curious if there are any cases at all where
> greediness changes whether it finds a match.
> 
>> (pls copy me on responses)
> 
> Ah, too bad you won't see it then....
> 
> 
> Carl Banks
> 


From nogradi at gmail.com  Wed Nov 22 09:20:53 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 22 Nov 2006 15:20:53 +0100
Subject: text file parsing (awk -> python)
In-Reply-To: <ek1hbd$bac$01$1@news.t-online.com>
References: <mailman.582.1164195481.32031.python-list@python.org>
	<ek1hbd$bac$01$1@news.t-online.com>
Message-ID: <5f56302b0611220620o77583ac3xb740ac3ce59d09a5@mail.gmail.com>

> > I have an awk program that parses a text file which I would like to
> > rewrite in python. The text file has multi-line records separated by
> > empty lines and each single-line field has two subfields:
> >
> > node 10
> > x -1
> > y 1
> >
> > node 11
> > x -2
> > y 1
> >
> > node 12
> > x -3
> > y 1
> >
> > and this I would like to parse into a list of dictionaries like so:
> >
> > mydict[0] = { 'node':10, 'x':-1, 'y':1 }
> > mydict[1] = { 'node':11, 'x':-2, 'y':1 }
> > mydict[2] = { 'node':12, 'x':-3', 'y':1 }
> >
> > But the names of the fields (node, x, y) keeps changing from file to
> > file, even their number is not fixed, sometimes it is (node, x, y, z).
> >
> > What would be the simples way to do this?
>
> data = """node 10
> x -1
> y 1
>
> node 11
> x -2
> y 1
>
> node 12
> x -3
> y 1
> """
>
> def open(filename):
>     from cStringIO import StringIO
>     return StringIO(data)
>
> converters = dict(
>     x=int,
>     y=int
> )
>
> def name_value(line):
>     name, value = line.split(None, 1)
>     return name, converters.get(name, str.rstrip)(value)
>
> if __name__ == "__main__":
>     from itertools import groupby
>     records = []
>
>     for empty, record in groupby(open("records.txt"), key=str.isspace):
>         if not empty:
>             records.append(dict(name_value(line) for line in record))
>
>     import pprint
>     pprint.pprint(records)


Thanks very much, that's exactly what I had in mind.

Thanks again,
Daniel


From john at castleamber.com  Thu Nov 16 12:30:29 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 17:30:29 GMT
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<1163559359.010787.185840@m73g2000cwd.googlegroups.com>
	<unvs24-8fi.ln1@lairds.us>
	<1163681949.338244.323390@k70g2000cwa.googlegroups.com>
	<mailman.253.1163682538.32031.python-list@python.org>
	<1163697632.352189.110920@h54g2000cwb.googlegroups.com>
Message-ID: <Xns987D75107703castleamber@130.133.1.4>

"Luis M. Gonz?lez" <luismgz at gmail.com> wrote:

> 
> Fredrik Lundh ha escrito:
> 
>> Luis M. Gonz?lez wrote:
>>
>> > But as a web development language, it's olnly when people started
>> > to look for the "rails killer" and many python alternatives started
>> > to come up (although Django has been in development for a long time
>> > before all this hype).
>>
>> nah, people have built web stuff on Python for as long as we've had a
>> web. 
>>
>> </F>
> 
> I know, but would you consider a python cgi application a good
> competence against php?

php running as cgi you mean.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From greg.kujawa at gmail.com  Wed Nov 29 14:45:18 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 29 Nov 2006 11:45:18 -0800
Subject: why would anyone use python when java is there?
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164818505.696250.264070@h54g2000cwb.googlegroups.com>
Message-ID: <1164829518.865155.60720@l39g2000cwd.googlegroups.com>

He trolls other groups as well. Smalltalk for example -->
http://groups.google.com/group/comp.lang.smalltalk/browse_thread/thread/1c83e576be824633/927227555661a2cd?lnk=gst&q=gavino&rnum=1#927227555661a2cd.
There are at least a dozen recent posts where he asks some obvious
trollling line of questioning...

Adam Jones wrote:
> gregarican wrote:
> > gavino wrote:
> > > wtf
> >
> > You have to be trolling I would think.
>
> Yeah, gavino has been trolling comp.lang.lisp for quite some time. For
> the life of me I can't understand why he would troll comp.lang.python
> when comp.lang.lisp is there.
> 
> -Adam



From srikrishnamohan at gmail.com  Wed Nov 15 17:04:58 2006
From: srikrishnamohan at gmail.com (km)
Date: Thu, 16 Nov 2006 03:34:58 +0530
Subject: java python GPL
Message-ID: <f4cc03640611151404k6dfe1a34nea7aa47fba2988db@mail.gmail.com>

Hi all,

what does Java released under GPL mean to python ?
could it hamper python development on the long run?

regards,
KM
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From pieterswart at comcast.net  Sat Nov 25 23:49:55 2006
From: pieterswart at comcast.net (Pieter Swart)
Date: 25 Nov 2006 20:49:55 -0800
Subject: Graph Data Structures
In-Reply-To: <mailman.714.1164463530.32031.python-list@python.org>
References: <mailman.714.1164463530.32031.python-list@python.org>
Message-ID: <1164516595.141919.29580@h54g2000cwb.googlegroups.com>

Nathan Harmston wrote:

> Currently I am working on a generic graph library  so I can do various
> graph based analysis for various projects I have ideas for. Currently
> I am implementing Graph as a wrapper around a dictionary. Currently my
> implementation works like this:
>
>         t = Graph()
>         n1 = Node("Node1")
>         n2 = Node("Test2")
>         edge1 = Edge("Test3")
>         t += n1                                    { n1:{}}
>         t[n1][n2] = edge1                    { n1:{n2:edge1}
>
> However this isnt actually ending up with the structure I want. I want
> it to finally end up as ......            { n1:{n2:edge1}, n2:{}}. Is
> there anyway I can do this simply????

Nathan

By now you probably discovered that the networkx package can handle
this.
If I have this right, you want to create a digraph with
a directed edge from "Node1" to "Node2" and this edge
has the string "Test3" attached to it. In networkx, this is exacty what
the  XDiGraph class was designed to do. Here DiGraph means
directed graph and the X means you are allowed to add (any)
data to the edge,for example:

>>> import networkx as nx
>>> t = nx.XDiGraph()
>>> t.add_edge( "Node1", "Node2", "Test3")


> Also I am looking at having a large graph and was wondering if anyone
> knew of anyway I could reduce the memory requirements of this
> structure and improve the speed of queries on it. I m thinking writing
> a C extension for it....is this a good idea and where would I start?
> Or does Python have some kind of transparent memory access module I
> can implement.
>

Networkx was designed so that you can hook your own
C extension in. However, making it ispeed or memory efficient
is quite application dependent. I am still not clear as to exactly what

class of algorithms you want to implement via a string-interval
representation, and whether you demand exact alignment or whether
missing/incorrect data etc. is allowed as part of the alignment
problem.

HTH
Pieter Swart



From python-ml at nn7.de  Fri Nov 24 05:11:06 2006
From: python-ml at nn7.de (Soeren Sonnenburg)
Date: Fri, 24 Nov 2006 10:11:06 +0000 (UTC)
Subject: bz2.readline() slow ?
Message-ID: <ek6gfq$hn6$1@fortknox.intranet.wo.rk>

Dear all,

I am a bit puzzled, as

-----snip-----
import bz2
f=bz2.BZ2File('data/data.bz2');

while f.readline():
        pass
-----snip-----

takes twice the time (10 seconds) to read/decode a bz2 file
compared to

-----snip-----
import bz2
f=bz2.BZ2File('data/data.bz2');
x=f.readlines()
-----snip-----

(5 seconds). This is even more strange as the help(bz2) says:

     |  readlines(...)
     |      readlines([size]) -> list
     |      
     |      Call readline() repeatedly and return a list of lines read.
     |      The optional size argument, if given, is an approximate bound on the
     |      total number of bytes in the lines returned.

This happens on python2.3 - python2.5 and it does not help to specify a
maximum line size.

Any ideas ?
Soeren


From http  Thu Nov 16 05:44:30 2006
From: http (Paul Rubin)
Date: 16 Nov 2006 02:44:30 -0800
Subject: Decimal() instead of float?
References: <1163294604.4675.4.camel@pepper>
	<mailman.2125.1163295096.11739.python-list@python.org>
	<pan.2006.11.12.02.08.31.428995@REMOVE.THIS.cybersource.com.au>
	<1163322853.760315.51040@k70g2000cwa.googlegroups.com>
	<455b82a0$0$7054$c3e8da3@news.astraweb.com>
	<ejg2h0$rpg$1@sea.gmane.org>
	<mailman.240.1163673388.32031.python-list@python.org>
Message-ID: <7xhcwzy8kx.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> Unfortunately some applications are getting such large tables that a
> 32-bit field is insufficient to enumerate all existing and deleted
> rows. Then you have to start keeping tables of unused primary keys.

Please tell me that's not from some Kafka nightmare.  They don't use
64-bit ints?


From jcoleman at franciscan.edu  Thu Nov  2 16:29:57 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 2 Nov 2006 13:29:57 -0800
Subject: Python in sci/tech applications
In-Reply-To: <mailman.1690.1162501294.11739.python-list@python.org>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
	<1162489638.013433.102180@h48g2000cwc.googlegroups.com>
	<mailman.1677.1162490601.11739.python-list@python.org>
	<1162491753.605134.162700@i42g2000cwa.googlegroups.com>
	<eideec$tk8$1@sea.gmane.org> <eidlpc$qfi$1@sea.gmane.org>
	<mailman.1690.1162501294.11739.python-list@python.org>
Message-ID: <1162502997.175322.171730@e3g2000cwe.googlegroups.com>

Maybe I don't know what I'm looking for, but I downloaded Enthought a
few days ago and don't seem to find MinGW on my system. There are 2
relatively small (totalling about 13 kb IIRC) *python* files deeply
buried in the distribution with mingw in their filename but nothing
like a gcc compiler. I've mostly used visual studio or code warrior for
C compiling, so again - maybe I don't know what I am looking for.

-John Coleman

p.s. Pretty cool sig line - the older I get, the more enigmatic the
world seems. I appreciate all of the effort that Enthought puts into
their distribution.

Robert Kern wrote:
> Steve Holden wrote:
> > Robert Kern wrote:
> >> bearophileHUGS at lycos.com wrote:
> >>
> >>> Robert Kern:
> >>>
> >>>> We distribute mingw set up to do this with our "Enthought
> >>>> Edition" Python distribution.
> >>>> http://code.enthought.com/enthon/
> >>> Sorry, maybe I'm blind but I don't see MinGW listed in that page...
> >>> Maybe it's included but not listed...
> >>
> >> It's there.
> >>
> > Well I tend to believe you, but Firefox is calling you a liar: a search
> > fails at "min".
>
> Sorry, by "it's there" I meant "it is actually included in the distribution
> regardless of any omissions on the web page."
>
> > Do you anticipate a 2.5-based release any time soon?
>
> We'll start working on it soon, at least.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Eco



From ptmcg at austin.rr._bogus_.com  Mon Nov 20 05:26:02 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 20 Nov 2006 10:26:02 GMT
Subject: trying to create a dictionary in python,
	using variables as a value
References: <1164008459.159792.48600@k70g2000cwa.googlegroups.com>
Message-ID: <_of8h.984$Gk5.315@tornado.texas.rr.com>


"ronrsr" <ronrsr at gmail.com> wrote in message 
news:1164008459.159792.48600 at k70g2000cwa.googlegroups.com...
> but I keep getting syntax errors on this one -
>
>
>
> adict = {'zid': result[0][0], 'keywords': result{0][1],
> 'quotations':result[0][2],'citations':result[0]{3]};
>

Probably because it has some syntax errors in it.  Look carefully at your 
"[" characters, you have typed some of them as "{".

-- Paul




From stefan.behnel-n05pAM at web.de  Thu Nov 16 08:47:47 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 16 Nov 2006 14:47:47 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <mailman.256.1163683769.32031.python-list@python.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<ejhlar$bob$1@sea.gmane.org>	<DC6E4BF7-C3F6-449C-9E2B-0668CE5749A9@snowtide.com>	<ejho32$lim$1@sea.gmane.org>
	<mailman.256.1163683769.32031.python-list@python.org>
Message-ID: <455C6C03.5080802@web.de>

Chas Emerick wrote:
> the delta between Elements and DOM-style elements leads to other issues.
> There's no doubt that the needed helpers are simple, but all things being
> equal, not having to carry them around anywhere we're doing DOM
> manipulations is a big plus.
> 
> Because we're far from doing anything that is regular or one-off in nature.
> We're systematizing the extraction of data from functionally unstructured
> content, and it's flatly necessary to normalize the XHTML into something
> that can be easily consumed by the processes we've built that can do that
> content->data extraction/conversion from plain text, XML, PDF, and now
> XHTML.
> 
> Remember, corner cases. :-)

Hmm, then I really don't get why you didn't just write a customised XHTML API
on top of lxml's custom Element classes feature. Hiding XML language specific
behaviour directly in the Element classes really helps in getting your code
clean, especially in larger code bases.

Stefan


From fredrik at pythonware.com  Thu Nov 23 09:17:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 15:17:45 +0100
Subject: "10, 20, 30" to [10, 20, 30]
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com><G58379679.47.1334.1@mxextra>
	<9afea2ac0611230335r7c987fcdw9918ef55746afe96@mail.gmail.com>
Message-ID: <ek4ai9$gce$1@sea.gmane.org>

Tim Williams wrote:

>> It is a dangerous solution if your data is coming from an untrusted source.
>>
>> >>> s = "10, 20, 30"
>> >>> L = [x.strip() for x in s.split(',')]
>> >>> L
>> ['10', '20', '30']
>> >>> L = [int(x) for x in L]
>> >>> L
>> [10, 20, 30]
>>
>> Or, as a one liner:  [int(x.strip()) for x in s.split(',')]
>
> You don't need the strip()
>
>>>> int('    10     ')
> 10
>>>>

and the use of a list comprehension is pretty silly to, given that you want
to apply the same *function* to all items, and don't really need to look
it up for every item:

    map(int,  s.split(','))

</F> 





From luismgz at gmail.com  Tue Nov 14 21:55:59 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 14 Nov 2006 18:55:59 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
Message-ID: <1163559359.010787.185840@m73g2000cwd.googlegroups.com>



> - Python is more readable, and more general purpose

Yes, php is only for web.
On the other hand, Python is a general purpose language and it can be
used for nearly anything you may want to do.

> - PHP has awful backward compatibility

Yes. And it's also an ugly language to work with.

> - PHP has a lower barrier to entry

I don't think it is any easier than python. Not even to begin with.

> - Most inexpensive web-hosters support PHP, but not Python

Sad but true.

> - PHP has far more pre-writen scripts available

For web projects, perhaps.
But I'm sure you can do everything better with python, especially with
the new crop of web frameworks (Django, Turbo Gears, etc...).

> - Newer versions of mod_python require Apache 2.0, which few hosters
> have

You can also get alder versions of mod_python. What's the problem?

> - There is more demand for PHP developers, than Python developers

So you want to be a web developer?
Then look no further. Learn python and go kick php developers asses in
the market place.
There are thousands of php developers out there. Do you want to be just
one more?
I'd rather learn something newer, and much more powerful.
And once you get a job, you will do everything better and faster than
the others, your quality will stand up from the rest and so your
reputation.
Then there will be more demand for "your skills".



From fred at adventistcare.org  Wed Nov 29 14:34:14 2006
From: fred at adventistcare.org (Sells, Fred)
Date: Wed, 29 Nov 2006 14:34:14 -0500
Subject: Python work in UK
Message-ID: <1A4BF05172023E468CB6E867923BC90402B6E39E@accmail2.sunbelt.org>

The technical director of Cabletron used to write applications in Python,
then give the working product/code to the development group to convert.
Perhaps you could build stuff in Python and outsource the conversion to
India?

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of Steven Wayne
Sent: Friday, November 24, 2006 10:42 AM
To: python-list at python.org
Subject: Re: Python work in UK


On Thu, 23 Nov 2006 19:28:26 +0000, Will McGugan
	<will at willNOmcguganSPAM.com> wrote:
> Hi,
>
> I'd love to work in Python, for the sake of my blood pressure, but there 
> doesnt seem to be that many jobs that look for Python as the main skill. 
> I use Python at work from time to time, and occasionaly get to spend 
> several days on a Python project but the majority of the time I use C++. 
> How can I make that leap to working with Python? There doesn't seem to 
> be many UK positions on the jobs section of Python.org or the usual jobs 
> sites. Any recommended jobs sites or tips? (I have googled)
>
> In the off chance that a potential empolyer is reading this, I'm looking 
> for something in web development, applications, graphics or other 
> interesting field. Here is a copy of my CV.
>
> http://www.willmcgugan.com/cvwillmcgugan.pdf
>
> Regards,
>
> Will McGugan

www.riverhall.co.uk are looking.

Steven
-- 
 .''`.
: :'  :
`. `'`
  `-
-- 
http://mail.python.org/mailman/listinfo/python-list


From jameshcunningham at gmail.com  Wed Nov 15 11:22:56 2006
From: jameshcunningham at gmail.com (James Cunningham)
Date: Wed, 15 Nov 2006 11:22:56 -0500
Subject: Python v PHP: fair comparison?
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<mailman.196.1163605636.32031.python-list@python.org>
Message-ID: <2006111511225616807-jameshcunningham@gmailcom>



On 2006-11-15 10:47:07 -0500, "Demel, Jeff" 
<Jeff.Demel at JavelinDirect.com> said:

> [...]
> That's true, but I was lucky enough to find webfaction.com for python
> hosting, including Django.  Good prices and they know Python.  I think
> they used to be python-hosting.com or something.
> 
> -Jeff

Dirt-cheap Dreamhost also offers Python with Django (as well as Ruby 
with Rails), though I haven't used those capabilities so I can't judge 
how good the environment is. I suspect it isn't that great. The people 
at Dreamhost are great; the service itself is - at best! - unreliable.

Best,
James



From phoolimin at gmail.com  Mon Nov 20 05:42:30 2006
From: phoolimin at gmail.com (phoolimin at gmail.com)
Date: 20 Nov 2006 02:42:30 -0800
Subject: Dao language 1.0 beta is release!
Message-ID: <1164019350.888749.34390@e3g2000cwe.googlegroups.com>

Hello,

After a few months' effort, I have finished the implementation of Dao
Virtual Machine(DVM), and released it as 1.0-beta. The DVM is
implemented as a very efficient virtual register machine. This version
has implemented all the features I have planned. Most importantly, the
implementation has been switched from C++ to standard C. As a
consequence, the binary code of DVM is much smaller than before (as
executable 250KB, as dynamic linking library 300KB, linux/gcc4). The
efficiency has also been improved as well. The structure of DVM has
been changed slightly, such that the embedding and extending of DVM
becomes more convinient. In fact, now the mechanism to call internal
functions is exactly the same as the mechanism to call extended
functions. To allow DVM being more freely used, GLPL (GNU Lesser
General Public Licence) has been adopted since this release. The DVM
can be compiled and run in both windows and linux, but so far, it is
tested mainly under linux. As before, the documentation of Dao is not
well prepared yet; and there are only a few extended modules available
for using. These two things will be the prioritized work in the near
future.

links:
website: http://www.xdao.org
documentations: http://www.xdao.org/daoweb.dao?page=document

=========================
Changed or new features
=========================

-----
Multiple lines comment: <<<...>>> is changed to #{...#}, which can be
used anywhere in the scripts.

-----
Built-in functions have been organized into some basic libraries:
stdlib, stdio, math, reflect, coroutine, thread etc. So now Built-in
function xyz(...) should be used abc.xyz(...), where "abc" is the
proper library. For convinience and efficiency, one may also do:
xyz = abc.xyz;
xyz(...);

-----
More methods are added for basic data types;

-----
Bit operations |, &, ^, ~, <<, >>;

-----
Typed variables, assignment between variable of different types will
issure an error:

a : 1; # a is a number; not compiled virtual instruction;
a := 1; # a is a number; compiled into assignment instruction;

The right side of : or := must be a const. This kind of syntax is for
consistence with syntax for specifying typed parameters in function
definition;

-----
Similarly class may have typed instance variables. Moreover, "my a :=
1" will also specify the default value for the variable;

-----
Class instance creation by enumeration:
class MyNumber
    my value := 0;
end

num1 = MyNumber{ 123 };

num2 = MyNumber {
    value @= 456; # may specify the name of variables to be
initialized.
};

Be cautious when enumerating class members without speficying names
to create class instances for derived classes.

-----
Creating multi-dimensional array:

changed from
list = { 2, 3 } : 100;
array = [ 2, 3 ] : 100; # 2 X 3 matrix
to
list = 100 <@> { 2, 3 };
array = 100 <@> [ 2, 3 ];

operator <@> can be called arrange operator. A<@>B, arrange A or copies
of A into a list or array of shape B. If B is a list, this operator
will create a new list which has shape specified by B, and contains A
or copies of A as elements. If B is a numeric array, this operator will
create a numeric array with shape B; if A is also a numberic array, the
resulting array will contain multiple subarrays that are equal to A.

This new operator is introduce because the previous using colon for
multiple purpose is confusing.

-----
Support coroutines similar to Lua coroutines;

-----
Previous built-in functions sort(),apply(),noapply() have become
methods of list
or numeric array with some changing in syntax:

before:
sort( list, @0 < @1, n );
now:
list.sort( @{ @0 < @1 }, n );
before?
apply( array[ 1:5, : ], @0 + @1 * @2 );
now:
array.apply( @{ @0 + @1 * @2 }, { 1:5, : } );

Expressions that are used as parameters should be put inside @{ }. The
advantage for this is,
simpler parsing; and moreover, they can be passed to C extending
functions.

===================
Extending modules:
===================
New modules available:
- DaoCGI: CGI web programming;
- DaoFastCGI: FastCGI web programming;allow DVM to run as FastCGI
server;
- DaoSqlite: binding to Sqlite3 database; lighttpd +sqlite +dao could
be a good option
             for some websites, since each of them is designed to be
light and efficient.
- DaoOpenGL: 3D graphics; support upto DaoOpenGL1.1?including GLU;
- DaoSDL: binding to Single DirectMedia Layer, partially finished;
- DaoCamellia: binding to camellia image processing library;

The previous modules DaoMySQL, DaoBLAS and DaoPython are not yet
upgraded accordingly for this release.

Have fun!

Limin Fu
phoolimin[AT]gmail[DOT]com



From spe.stani.be at gmail.com  Wed Nov 29 18:15:45 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 29 Nov 2006 15:15:45 -0800
Subject: SPE refuses.
In-Reply-To: <mailman.857.1164838885.32031.python-list@python.org>
References: <mailman.846.1164826327.32031.python-list@python.org>
	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>
	<mailman.857.1164838885.32031.python-list@python.org>
Message-ID: <1164842145.465496.135210@h54g2000cwb.googlegroups.com>

Do you have python-wxversion installed?

$sudo apt-get install python-wxversion

Stani

On 29 nov, 23:21, egbert <egbert.bouw... at hccnet.nl> wrote:
> On Wed, Nov 29, 2006 at 11:31:27AM -0800, SPE - Stani's Python Editor wrote:> If wxPython is rightly installed, which means that "import wx" works
> > fine and "wx.VERSION" gives the right version, you can ignore the
> > wxPython warning.In a Python shell the commands 'import wx' and 'wx.VERSION' give:
>     (2,6,3,2,'')
>
> > Please cd do your site-packages directory and do "python SPE.py
> > --debug" and see the error message.In gnome-terminal  /usr/lib/python2.4/site-packages/_spe
> the command: 'python SPE.py --debug' produces the same error:
>     You need to install at least wxPython v2.5.4.1 to run SPE.
>     Get it fromhttp://www.python.org
>
> Well, I got it from the debian repositories.
>
> e.
> --
> Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
> ========================================================================



From fredrik at pythonware.com  Sat Nov 25 09:32:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 25 Nov 2006 15:32:18 +0100
Subject: Importing module of data dicts and constants
In-Reply-To: <676224240611250619s764cb644kb254536e3f7aca2e@mail.gmail.com>
References: <676224240611250619s764cb644kb254536e3f7aca2e@mail.gmail.com>
Message-ID: <ek9k5j$6p4$1@sea.gmane.org>

Nathan Harmston wrote:

  > I ve got a single module which I m using to contain a lot of
> dictionaries, constants, general information, which are used by
> various other modules. However I can't seem to access them:
> 
> in data.py
> _SEQTYPE_DNA = 0
> _SEQTYPE_RNA = 1
> _SEQTYPE_PROT = 2
> _seqType = { "DNA":_SEQTYPE_DNA, "RNA":_SEQTYPE_RNA, "PROTEIN":_SEQTYPE_PROT }

why do they all start with an underscore?

> but in test.py

> from data import *

as clearly stated in the documentation, "from import *" consider names 
that start with an underscore to be private.

also see:

     http://effbot.org/pyref/reserved-identifier-classes.htm

> I think I m doing something incredibly wrong/stupid here....

well, you're only supposed to be using "from import *" if you know
what you're doing, so if you need to ask, you've obviously broken
the rules ;-)

</F>



From john106henry at hotmail.com  Thu Nov 30 15:17:50 2006
From: john106henry at hotmail.com (John Henry)
Date: 30 Nov 2006 12:17:50 -0800
Subject: Is there an easier way to express this list slicing?
In-Reply-To: <mailman.896.1164917235.32031.python-list@python.org>
References: <1164913125.509492.54060@79g2000cws.googlegroups.com>
	<mailman.896.1164917235.32031.python-list@python.org>
Message-ID: <1164917869.978435.63370@f1g2000cwa.googlegroups.com>


Thomas Ploch wrote:
<snip>
>
> I had a little bit of fun while writing this:
>
> itemList = (a,b,c1,c2,c3,d1,d2,d3,d4,d5) and
> itemList2 = (a1,a2,a3,b,c,d1,d2,d3,d4,d5) the next time.
>

Huh?  What's a,b,....d5?

> def getSlices(aCount, bCount, cCount, dCount, items):
>     a,b,c,d = (items[0:aCount],
>                 items[aCount:aCount+bCount],
>                 items[aCount+bCount:aCount+bCount+cCount],
> 		item[aCount+bCount+cCount:aCount+bCount+cCount+dCount])

You meant "items" here, right?

>     return list(a),list(b),list(c),list(d)
>
> >>>a,b,c,d = getSlices(1,1,3,5,itemList)
> >>>print a,b,c,d
> ['a'] ['b'] ['c1', 'c2', 'c3'] ['d1', 'd2', 'd3', 'd4', 'd5']
>
> >>>a,b,c,d = getSlices(3,1,1,0,itemList2)
> >>>print a,b,c,d
> ['a1', 'a2', 'a3'] ['b'] ['c'] []
> 
> %-)
> 
> Thomas



From fredrik at pythonware.com  Wed Nov 15 11:36:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 17:36:48 +0100
Subject: Python-2.5.exe?
In-Reply-To: <v8H6h.15$895.11@newsfe04.lga>
References: <v8H6h.15$895.11@newsfe04.lga>
Message-ID: <ejffmv$k7t$1@sea.gmane.org>

Andrew Burton wrote:

> What Python is best for installing to a USB Drive?  I've actually got 
> 2.5 on a drive, but I forget which installation package I used.  It 
> seems to me that it was an EXE file, but I cannot seem to find one of 
> those today.
> 
> Can the Python-2.5.msi installation files from python.org be installed 
> so as not to touch the registry, to make them portable?

python doesn't depend on the registry settings for normal use, so
you can simply install python as usual, copy python25.dll from 
c:\windows\system32 to c:\python25, and then copy (or move) the
entire c:\python25 tree to your USB drive.

</F>



From bearophileHUGS at lycos.com  Thu Nov  2 12:47:18 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Nov 2006 09:47:18 -0800
Subject: Python in sci/tech applications
In-Reply-To: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
References: <1162479244.031672.209580@e3g2000cwe.googlegroups.com>
Message-ID: <1162489638.013433.102180@h48g2000cwc.googlegroups.com>

mattf:
> 3) -There's a problem with development under Windows.

It's possibile to compile Python with MinGW, and to create extensions
with it. So some site can host a single zip file that contains both
MinGW and Python compiled with it, all ready and set. A person not much
expert can then create compiled small extensions in a short time
without too much complexities. (Or maybe the D language can be packed
into that, instead of MinGW, to do similar things. D can be a good
language used with Python) But then probably PIL, scipy, etc have to be
compiled again for such alternative official or semi-official Python
distribution.

Bye,
bearophile



From no-spam at no-spam-no-spam.invalid  Sun Nov 12 11:25:00 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Sun, 12 Nov 2006 17:25:00 +0100
Subject: numpy/scipy: correlation
In-Reply-To: <ej7cft$8de$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net>
Message-ID: <ej7hsu$gil$1@news.albasani.net>

robert wrote:
> Robert Kern wrote:
> http://links.jstor.org/sici?sici=0162-1459(192906)24%3A166%3C170%3AFFPEOC%3E2.0.CO%3B2-Y 
> 
> tells: 
> probable error of r = 0.6745*(1-r**2)/sqrt(N)
> 
> A simple function of r and N - quite what I expected above roughly for 
> the N-only dep.. But thus it is not sensitive to above considerations 
> about 'boring' data. With above example it would spit a decrease of this 
> probable coef-err from
> 0.0115628571429 to 0.00548453410954 !

This 1929 formula for estimating the error of correlation coefficient seems to make some sense for r=0 . 
I do monte carlo on correlating random series:

>>> X=numpy.random.random(10000)
>>> l=[]
>>> for i in range(200): 
... 	Z=numpy.random.random(10000)
... 	l.append( sd.correlation((X,Z))[2] )   #collect coef's
... 
>>> mean(l)
0.000327657082234
>>> std(l)
0.0109120766158          # thats how the coef jitters
>>> std(l)/sqrt(len(l))
0.000771600337185
>>> len(l)
200

# now
# 0.6745*(1-r**2)/sqrt(N) = 0.0067440015079
# vs M.C.                   0.0109120766158 ? 0.000771600337185


but the fancy factor of 0.6745 is significantly just fancy for r=0.

then for a higher (0.5) correlation:

>>> l=[]
>>> for i in range(200): 
... 	Z=numpy.random.random(10000)+array(range(10000))/10000.0
... 	l.append( sd.correlation((X+array(range(10000))/10000.0,Z))[2] )
... 
>>> mean(l)
0.498905642552
>>> std(l)
0.00546979583163
>>> std(l)/sqrt(len(l))
0.000386772972425

#now:
# 0.6745*(1-r**2)/sqrt(N) = 0.00512173224849)
# vs M.C.                   0.00546979583163 ? 0.000386772972425

=> there the 0.6745 factor and (1-r**2) seem to get the main effect ! There is something in it.

--

Now adding boring data:

>>> boring=ones(10001)*0.5
>>> X=numpy.random.random(10000)
>>> l=[]
>>> for i in range(200): 
... 	Z=concatenate((numpy.random.random(10000)+array(range(10000))/10000.0,boring))
... 	l.append( sd.correlation((concatenate((X+array(range(10000))/10000.0,boring)),Z))[2] )
... 	
>>> mean(l)
0.712753628489             # r
>>> std(l)
0.00316163649888           # r_err
>>> std(l)/sqrt(len(l))
0.0002235614608

# now:
# 0.6745*(1-r**2)/sqrt(N) = 0.00234459971461       #N=20000
# vs M.C. streuung          0.00316163649888 ? 0.0002235614608

=> the boring data has an effect on coef-err which is significantly not reflected by the formula 0.6745*(1-r**2)/sqrt(N) 

=> I'll use this formula to get a downside error estimate for the correlation coefficient:

------------------------------------------
|  r_err_down ~= 1.0 * (1-r**2)/sqrt(N)  |
------------------------------------------

(until I find a better one respecting the actual distribution of data)

Would be interesting what MATLAB & Octave say ...


-robert


From bj_666 at gmx.net  Sat Nov 18 16:07:00 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 18 Nov 2006 22:07:00 +0100
Subject: print with variable justification (with *)
References: <1163883589.401180.271190@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.18.21.07.00.175065@gmx.net>

In <1163883589.401180.271190 at m73g2000cwd.googlegroups.com>, Why Tea wrote:

> print format % values
> An optional minimum width of the conversion, specified using one or
> more digits or an asterisk (*), which means that the width is taken
> from the next item in values
> 
> That's from one of O'reilly's books. But there is no example and I
> couldn't get it to work by trials and errors. Does anyone have a
> working example?

In [50]: '%*s' % (5, 'spam')
Out[50]: ' spam'

In [51]: '%*s' % (10, 'spam')
Out[51]: '      spam'

In [52]: '%*s' % (15, 'spam')
Out[52]: '           spam'

Ciao,
	Marc 'BlackJack' Rintsch


From will at willNOmcguganSPAM.com  Wed Nov 29 17:29:09 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Wed, 29 Nov 2006 22:29:09 +0000
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
Message-ID: <456e09b7$0$1505$db0fefd9@news.zen.co.uk>

Steve Bergman wrote:
> Just wanted to report a delightful little surprise while experimenting
> with psyco.
> The program below performs astonoshingly well with psyco.
> 
> It finds all the prime numbers < 10,000,000

Actualy, it doesn't. You forgot 1 and 2.


Will McGugan
-- 
blog: http://www.willmcgugan.com


From richie at entrian.com  Thu Nov 30 06:23:40 2006
From: richie at entrian.com (Richie Hindle)
Date: Thu, 30 Nov 2006 11:23:40 +0000
Subject: why would anyone use python when java is there?
In-Reply-To: <1164818505.696250.264070@h54g2000cwb.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164818505.696250.264070@h54g2000cwb.googlegroups.com>
Message-ID: <knftm215cu05lq8ukq5lneubuuj51d0dnh@4ax.com>


[Adam]
> For the life of me I can't understand why he would troll
> comp.lang.python when comp.lang.lisp is there.

+1 QOTW!

-- 
Richie Hindle
richie at entrian.com


From sjmachin at lexicon.net  Sun Nov 26 06:46:06 2006
From: sjmachin at lexicon.net (John Machin)
Date: 26 Nov 2006 03:46:06 -0800
Subject: a -very- case sensitive search
In-Reply-To: <HDeah.2979$_H5.535@tornado.texas.rr.com>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<HDeah.2979$_H5.535@tornado.texas.rr.com>
Message-ID: <1164541566.246893.279680@l12g2000cwl.googlegroups.com>


Paul McGuire wrote:
> "Ola K" <olakh at walla.co.il> wrote in message
> news:1164490795.866046.133230 at 45g2000cws.googlegroups.com...
> > Hi,
> > I am pretty new to Python and I want to make a script that will search
> > for the following options:
> > 1) words made of uppercase characters -only- (like "YES")
> > 2) words made of lowercase character -only- (like "yes")
> > 3) and words with only the first letter capitalized (like "Yes")
> > * and I need to do all these considering the fact that not all letters
> > are indeed English letters.
> >
> > I went through different documention section but couldn't find a right
> > condition, function or method for it.
> > Suggestions will be very much appriciated...
> > --Ola
> >
> Ola,
>
> You may be new to Python, but are you new to regular expressions too?  I am
> no wiz at them, but here is a script that takes a stab at what you are
> trying to do. (For more regular expression info, see
> http://www.amk.ca/python/howto/regex/.)
>
> The script has these steps:
> - create strings containing all unicode chars that are considered "lower"
> and "upper", using the unicode.is* methods
> - use these strings to construct 3 regular expressions (or "re"s), one for
> words of all lowercase letters, one for words of all uppercase letters, and
> one for words that start with an uppercase letter followed by at least one
> lowercase letter.
> - use each re to search the string u"YES yes Yes", and print the found
> matches
>
> I've used unicode strings throughout, so this should be applicable to your
> text consisting of letters beyond the basic Latin set (since Outlook Express
> is trying to install Israeli fonts when reading your post, I assume these
> are the characters you are trying to handle).

I'd guessed the OP was in Israel from his e-mail address. If that's
what Outlook Express is doing, then that's conclusive proof :-)

An aside to the OP: Pardon my ignorance, but does Hebrew have upper and
lower case?

> You may have to do some setup
> of your locale for proper handling of unicode.isupper, etc.,

Whatever gave you that impression?

> but I hope this
> gives you a jump start on your problem.
>
> -- Paul
>
>
> import sys
> import re
>
> uppers = u"".join( unichr(i) for i in range(sys.maxunicode)
>                     if unichr(i).isupper() )
> lowers = u"".join( unichr(i) for i in range(sys.maxunicode)
>                     if unichr(i).islower() )

Just in case the OP is running a 32-bit unicode implementation, you
might want to make that xrange, not range :-)

>
> allUpperRe = ur"\b[%s]+\b" % uppers
> allLowerRe = ur"\b[%s]+\b" % lowers
> capWordRe = ur"\b[%s][%s]+\b" % (uppers,lowers)
>
> regexes = [
>     (allUpperRe, "all upper"),
>     (allLowerRe, "all lower"),
>     (capWordRe, "title case"),
>     ]
> for reString,label in regexes:
>     reg = re.compile(reString)
>     result = reg.findall(u" YES  yes Yes ")
>     print label,":",result
>
> Prints:
> all upper : [u'YES']
> all lower : [u'yes']
> title case : [u'Yes']

Cheers,
John



From martin at v.loewis.de  Thu Nov 16 18:31:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 17 Nov 2006 00:31:06 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<455CED78.1060604@v.loewis.de>
	<bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>
Message-ID: <455CF4BA.1050608@v.loewis.de>

gabor schrieb:
>> All this code will typically work just fine with the current behavior,
>> so people typically don't see any problem.
>>
> 
> i am sorry, but it will not work. actually this is exactly what i did,
> and it did not work. it dies in the os.path.join call, where file_name
> is converted into unicode. and python uses 'ascii' as the charset in
> such cases. but, because listdir already failed to decode the file_name
> with the filesystem-encoding, it usually also fails when tried with
> 'ascii'.

Ah, right. So yes, it will typically fail immediately - just as you
wanted it to do, anyway; the advantage with this failure is that you
can also find out what specific file name is causing the problem
(whereas when listdir failed completely, you could not easily find
 out the cause of the failure).

How would you propose listdir should behave?

Regards,
Martin


From wojciech_mula at poczta.null.onet.pl.invalid  Tue Nov 14 10:08:53 2006
From: wojciech_mula at poczta.null.onet.pl.invalid (Wojciech =?iso-8859-2?Q?Mu=B3a?=)
Date: Tue, 14 Nov 2006 15:08:53 +0000 (UTC)
Subject: Tkinter: Strange behavior using place() and changing cursors
References: <1163467464.043668.44630@e3g2000cwe.googlegroups.com>
Message-ID: <slrneljmv7.1kp.wojciech_mula@cat.tac>

Mudcat wrote:
> [...]

You have to set cursor once, Tk change it automatically:

> 	def buildFrame(self):
> 		self.f = Frame(self.master, height=32, width=32, relief=RIDGE,
> borderwidth=2)
> 		self.f.place(relx=.5,rely=.5)
 		#self.f.bind( '<Enter>', self.enterFrame )
 		#self.f.bind( '<Leave>', self.leaveFrame )
 		self.f.configure(cursor = 'sb_h_double_arrow')


From bblais at bryant.edu  Fri Nov  3 11:24:05 2006
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 03 Nov 2006 11:24:05 -0500
Subject: setting up wxPython on a Mac
Message-ID: <454B6D25.9030002@bryant.edu>

Hello,

I have a wxPython program that I would like to give to a friend of mine who has a 
Mac.  Is there a resource out there that can tell me what steps I need to follow to 
do this?  Under windows, I would just install Enthought, and it would work without 
any modifications.  I don't know Macs all that well, but is there something similar?

Thanks,


			Brian Blais

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

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From gslindstrom at gmail.com  Thu Nov 23 13:14:58 2006
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Thu, 23 Nov 2006 12:14:58 -0600
Subject: Python business software?
Message-ID: <a9f39a410611231014xbe1b185lc9e7b55fca4c1a60@mail.gmail.com>

Hello-

My wife runs a sewing/embroidery business and has asked me to write a system
to help her with her client database, inventory, and accounts
receivable/payable.  I've looked into using either PythonCard or Dabo (I
like both packages) but thought I ask the list if there is anything like
this out there already.  Tasks such as tracking clients are fairly routine
in business, so maybe there's something close that I could hack in order to
add details specific to our business.  We only have one computer right now,
so we don't *need* a web-based system but we plan on growing so it would be
an option.

Thanks for you help,
--greg
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From robert.kern at gmail.com  Thu Nov 30 13:50:50 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 30 Nov 2006 12:50:50 -0600
Subject: extremely slow array indexing?
In-Reply-To: <1164911616.009985.210320@h54g2000cwb.googlegroups.com>
References: <1164907021.765969.129280@80g2000cwy.googlegroups.com>	<1164908923.363433.43770@l39g2000cwd.googlegroups.com>
	<1164911616.009985.210320@h54g2000cwb.googlegroups.com>
Message-ID: <ekn96u$ps2$1@sea.gmane.org>

John Machin wrote:
> Hi Grace,
> What Will McGugan said, plus:
> 1. Post *much* more of your code e.g. all relevant parts :-)

Note that Grace has also posted this to numpy-discussion and with prompting
provided the following snippet as a distillation of the key slow part:


from numpy import *

componentcount = 300000
currSum = zeros(componentcount)
row = zeros(componentcount) #current row
rowcount = 50000
for i in range(1,rowcount):
    row[:] = 1
    currSum = currSum + row;


As it is, the OP gets through 1000 rows every 7 seconds or so on their machine,
and I get about the same on mine.

Changing the last line to "currSum += row" gets a 3x speedup. Dropping the
"row[:] = 1" line as it's a really just a time-consuming no-op in the example
and probably not an accurate reflection of what's going on in the real code gets
you another 2x speedup.

-- 
Robert Kern

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



From rw at smsnet.pl  Tue Nov 28 09:48:14 2006
From: rw at smsnet.pl (Rob Wolfe)
Date: 28 Nov 2006 06:48:14 -0800
Subject: Question about import and sys.path
In-Reply-To: <1164700262.370760.129210@l12g2000cwl.googlegroups.com>
References: <1164700262.370760.129210@l12g2000cwl.googlegroups.com>
Message-ID: <1164725294.490337.224430@l12g2000cwl.googlegroups.com>


Frank Millman wrote:
> Hi all
>
> I am writing a business/accounting application. Once a user has logged
> in they are presented with a menu. Each menu option has a description
> and an associated file name and program name. The file name is the name
> of a .py file (impName) and the program name is the name of a class in
> that file which I instantiate to run the program (progName).
>
> When a menu option is selected, I execute the program like this -
>         imp = __import__(impName)
>         app = getattr(imp,progName)()
>
> All the .py files are stored in one directory, which I add to sys.path
> at the beginning of the session. It all seems to work fine.
>
> Now my program directory is getting cluttered, so I want to split it
> into sub-directories, one per company (it is a multi-company system). I
> can do that, and each of the subdirectories can be added to sys.path,
> so it should work as at present.
>
> However, I want the ability to have duplicate program names stored in
> different subdirectories. At the time of selecting the menu option I
> know which company is active, so I know which directory I want to run
> the program from, but there does not seem to be a way to tell 'import'
> to import from a particular directory.

I suggest to use module `imp`.
For example:

I assume paths like this:

app/
     importer.py
     company1/
         prog1.py


the module in the company1 subdirectory:

# prog1
class SomeClass(object):
    def test(self):
        return "%s: %s" % (__file__, self.__class__.__name__)

and the module with your menu could look like this:

# importer.py

def get_class(classname, impname, company):
    fp, pathname, description = imp.find_module(impname, [company])
    m = imp.load_module(impname, fp, pathname, description)
    return getattr(m, classname)

obj = get_class("SomeClass", "prog1", "company1")()
print obj.test()

-- 
HTH,
Rob



From flynnguy at gmail.com  Fri Nov 24 11:07:30 2006
From: flynnguy at gmail.com (flynnguy at gmail.com)
Date: 24 Nov 2006 08:07:30 -0800
Subject: pexpect problems
Message-ID: <1164384450.074731.267330@45g2000cws.googlegroups.com>

I am trying to essentially fork a rsync process from my python script
and I am having some issues with the forking part. My program basically
checks to see if I need to transfer a file and if it does, it calls the
transferItem() function below:

def transferItem(filelist):
    hostname, passwd, transdir, filepath =  filelist
    command = "nice -n +19 %s --partial --bwlimit=\"%d\" \"%s\" %s:%s"
% (COMMAND_TO_CHECK, BANDWIDTH_LIMIT, filepath, hostname, transdir)
    p = pexpect.spawn(command)
    try:
        ret = p.expect(["(yes/no)", "Password:"])
        if ret == 0:
            p.sendline("yes")
            p.expect("Password:")
        p.sendline(passwd)
        p.expect(pexpect.EOF, timeout=999)
    except:
        print 'problem transferring file'

Now this seems to partially work (it transfers the file) but I have a
few issues I'm hoping someone can help me with. First there is the
timeout issue. Without the timeout=999 parameter, the default timeout
is 30 seconds. I'd rather not have any timeout because the files I need
to transfer can be quite large and may take several days in some cases.
I tried p.close(wait=False) but that creates a defunct process and
doesn't seem to transfer any of the file. I can also say p.interact()
which won't timeout on me but it also doesn't fork into the background.


I thought the best solution would be to use the p.interact() and fork
the process but I can't seem to get that working. Anyone have any ideas
or suggestions that might help me?

Also just as a background in case it helps, I am currently writing a
pickled object (List of list) to a file using a web frontend (using
django) and then I have a monitor script which first checks if it
should transfer a file (based on how many transfers are currently
running) and then opens the pickled object and pop's off the first item
and sends that as input to the above function which I'm hoping will
start the rsync and then keep on chugging. I'd really appreciate any
help anyone could offer.
-Chris



From michael at doubleserver.com  Fri Nov 24 19:33:47 2006
From: michael at doubleserver.com (J. Michael Caine)
Date: Fri, 24 Nov 2006 16:33:47 -0800
Subject: namespace curiosity
Message-ID: <200611241633.48043.michael@doubleserver.com>

I just noticed something that may well have an obvious explanation (apologies 
in advance if so).

Little demo illustrates:

>>> def x(y = {1:1}):
...     y[1] = y[1] + 1
...     print y[1]
...
>>> x()
2
>>> x()
3

and so on; y continues to be updated rather than reset each call to x().  
dir() suggests that y did _not_ somehow get into the global namespace, nor do 
I see anything else that explains the behavior obviously.  This only occurs 
with dicts (or rather, possibly with any object that is merely updated within 
x(), rather than reassigned within x()... I haven't tested).

I've been pythoning for a little while now, but haven't participated in this 
usenet; you're welcome to consider me a newbie and be gentle with any 
explanation of my oversight or whatever.  The nature of this problem made it 
difficult for me to investigate - to see if anyone else has reported or 
explained it.

TIA.


From daigno at gmail.com  Tue Nov 21 15:19:11 2006
From: daigno at gmail.com (=?ISO-8859-1?Q?=C9ric_Daigneault?=)
Date: Tue, 21 Nov 2006 15:19:11 -0500
Subject: Reference class in class creation
Message-ID: <45635F3F.5090701@gmail.com>

oops...

Change :
class SomeContainer(object):
    a = SomeElement(self)


for
class SomeContainer(object):
    pass

container = SomeContainer()

element = SomeElement(container)

would certainly make more sense...

Eric :D.


From python at contrado.com.au  Wed Nov 29 05:23:54 2006
From: python at contrado.com.au (Graeme Matthew)
Date: Wed, 29 Nov 2006 21:23:54 +1100
Subject: Asyncore Medusa Example
Message-ID: <456D5FBA.2010909@contrado.com.au>

Hi all


does anyone know where you can find examples of how to write a native 
python webserver, I have looked at medusa and asyncore but there are no 
real examples and the doco is very light


any help is appreciated


regards


graeme


From __peter__ at web.de  Tue Nov 14 06:07:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 12:07:51 +0100
Subject: Seeking assistance - string processing.
References: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>
	<mailman.125.1163500986.32031.python-list@python.org>
	<1163501742.957889.57410@m73g2000cwd.googlegroups.com>
Message-ID: <ejc81g$32g$00$1@news.t-online.com>

billpaterson2006 at googlemail.com wrote:

> Thanks so much, a really elegant solution indeed.
> 
> I have another question actually which I'm praying you can help me
> with:
> 
> with regards to the .jpg conversion to .jpg]] and .gif -> .gif]]
> 
> this works, but only when .jpg/.gif is on it's own line.
> 
> i.e:
> 
> .jpg
> 
> will get converted to:
> 
> .jpg]]
> 
> but
> 
> Image:test.jpg
> 
> gets converted to:
> 
> [[Image:test.jpg
> 
> rather than
> 
> [[Image:test.jpg]]
> 
> ------------------
> 
> Hope you can help again!  Cheers

It does not do the right thing in all cases, but maybe you can get away with

for line in lines:
    if line.startswith("==="):
        line = line.rstrip() + "===\n"
    line = line.replace("--------------------","----")
    line = line.replace("img:","[[Image:")
    line = line.replace(".jpg",".jpg]]")
    line = line.replace(".gif",".gif]]")
    output_lines.append(line)

Peter



From bearophileHUGS at lycos.com  Wed Nov 22 13:02:20 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Nov 2006 10:02:20 -0800
Subject: text file parsing (awk -> python)
In-Reply-To: <ek1hbd$bac$01$1@news.t-online.com>
References: <mailman.582.1164195481.32031.python-list@python.org>
	<ek1hbd$bac$01$1@news.t-online.com>
Message-ID: <1164218540.617987.72130@b28g2000cwb.googlegroups.com>

Peter Otten, your solution is very nice, it uses groupby splitting on
empty lines, so it doesn't need to read the whole files into memory.

But Daniel Nogradi says:
> But the names of the fields (node, x, y) keeps changing from file to
> file, even their number is not fixed, sometimes it is (node, x, y, z).

Your version with the converters dict fails to convert the number of
node, z fields, etc. (generally using such converters dict is an
elegant solution, it allows to define string, float, etc fields):

> converters = dict(
>     x=int,
>     y=int
> )


I have created a version with a RE, but it's probably too much rigid,
it doesn't handle files with the z field, etc:

data = """node 10
y 1
x -1

node 11
x -2
y 1
z 5

node 12
x -3
y 1
z 6"""

import re
unpack = re.compile(r"(\D+)   \s+  ([-+]?  \d+) \s+" * 3, re.VERBOSE)

result = []
for obj in unpack.finditer(data):
    block = obj.groups()
    d = dict((block[i], int(block[i+1])) for i in xrange(0, 6, 2))
    result.append(d)

print result


So I have just modified and simplified your quite nice solution (I have
removed the pprint, but it's the same):

def open(filename):
    from cStringIO import StringIO
    return StringIO(data)

from itertools import groupby

records = []
for empty, record in groupby(open("records.txt"), key=str.isspace):
    if not empty:
        pairs = ([k, int(v)] for k,v in map(str.split, record))
        records.append(dict(pairs))

print records

Bye,
bearophile



From steve at REMOVE.THIS.cybersource.com.au  Sun Nov 19 08:49:29 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 20 Nov 2006 00:49:29 +1100
Subject: tempfile.NamedTemporaryFile wont work
References: <456049ca$0$4692$426a74cc@news.free.fr>
Message-ID: <pan.2006.11.19.13.49.28.701463@REMOVE.THIS.cybersource.com.au>

On Sun, 19 Nov 2006 13:11:13 +0100, Imbaud Pierre wrote:

> On suse 9.3, tempfile.NamedTemporaryFile() doesnt work as expected.
[snip]

> Symptom: the file does not always exist, after the call to
> NamedTemporaryFile(). Or at least its not seen by the strings command,
> or by os.path.exists.
> 
> I guess the bug is pretty much os dependent, or even filesystem
> dependent (Im on reiserfs). Maybe the os is buggy, maybe, somehow, the
> python interface. Or did I miss something?
> Shame, I didnt even try to check for a python bug tracker.

I can verify this problem occurs on Fedora Core 5 too:

import os
import sys
import tempfile
import subprocess
def test(n):
	chunk = ': +++ abcd +++'
	for i in xrange(n):
		tf = tempfile.NamedTemporaryFile()
		tfName = tf.name
		tf.seek(0)
		tf.write(str(i) + chunk)
                tf.flush()
		if not os.path.exists(tfName):
			print 'pre-check: %s not there' % tfName
		subprocess.Popen(['strings', tfName])
		if not os.path.exists(tfName):
			print 'post-check: %s not there' % tfName


And here is a typical run, with the boring bits removed for ease of
reading:

>>> test(30)
0: +++ abcd +++
1: +++ abcd +++
    [ more of the same ]
14: +++ abcd +++
strings: '/tmp/tmpOALbx9': No such file
16: +++ abcd +++
17: +++ abcd +++
18: +++ abcd +++
    [ more of the same ]
27: +++ abcd +++
strings: /tmp/tmpdc52Nz: No such file or directory
29: +++ abcd +++


Curiouser and curiouser... not only does os.path.exist always report the
temp file as existing (at least in my tests), even when strings can't find
it, but strings returns different error messages.

Is it possible this is a bug in strings?


-- 
Steven.



From ak at silmarill.org  Tue Nov 21 00:17:41 2006
From: ak at silmarill.org (Rainy)
Date: 20 Nov 2006 21:17:41 -0800
Subject: Vim scripts for editing Python?
Message-ID: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>

Hi, did anyone make a good set of scripts for editing Python in Vim? I
know there is one on vim.org but it isn't very advanced. thx..



From steve at REMOVEME.cybersource.com.au  Thu Nov 16 03:45:18 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 16 Nov 2006 19:45:18 +1100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
Message-ID: <pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>

On Thu, 16 Nov 2006 17:44:37 +1000, timmy wrote:

> congraulations you have discovered loops and their misuse

Did you have a point in your utterly inane comment, or did you just want
to see your name on Usenet?

In any case, it isn't just "loops" that are dangerous.

print 2**512**512

No loop there, but it will operate as a lovely DoS attack if you run it.

The Original Poster is suggesting running UNTRUSTED code. That means you
have to assume that it will be actively hostile, but even if it isn't
deliberately hostile, there will be bugs which the developer can't control.

He wants to run this untrusted (hostile or buggy or both) code in an
environment where it can't do bad things. "Bad things" include Denial of
Service attacks. So, Timmy, let's hear your brilliant scheme for
preventing DoS attacks when running hostile code in Python.



-- 
Steven D'Aprano 



From gheorghe.postelnicu at gmail.com  Mon Nov 27 15:17:08 2006
From: gheorghe.postelnicu at gmail.com (Gheorghe Postelnicu)
Date: Mon, 27 Nov 2006 15:17:08 -0500
Subject: Several entries on Tile and TableList at the Tkinter wiki
Message-ID: <8094b1b60611271217i6ef19cb0reb26ab7478e96e46@mail.gmail.com>

Hi,

Thanks for pointing out this resource. I have indeed used Tkinter in a
couple of applications, but I knew nothing about this wiki. This is
very helpful.

Thanks,
-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School


From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 11 09:04:33 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 12 Nov 2006 01:04:33 +1100
Subject: handling many default values
References: <op.tis8o8jvgsh0hn@casc64043305.myhome.westell.com>
Message-ID: <pan.2006.11.11.14.04.33.220606@REMOVE.THIS.cybersource.com.au>

On Fri, 10 Nov 2006 17:11:24 +0000, Alan G Isaac wrote:

> My class MyClass reuses many default parameters
> with a small number of changes in each instance.

Let me see that I understand. Are you doing something like this?

# Class takes a lot of arguments
a = MyClass(0, 1, 2, 3, 4, 5, ..., 99)
# and instances vary only by one or two of those args
b = MyClass(0, 2, 2, 3, 4, 5, ..., 99)
c = MyClass(0, 3, 2, 3, 4, 5, ..., 99)
d = MyClass(0, 4, 2, 3, 4, 5, ..., 99)
e = MyClass(0, 5, 2, 3, 4, 5, ..., 99)
...
z = MyClass(0, 26, 2, 3, 4, 5, ..., 99)

If that's the case, I'd seriously rethink your class design. It is hard to
advise a better design without knowing more about the class, but I'd be
surprised if you can't use subclassing to reduce the number of parameters
needed. E.g.:

class MyClass(object):
    def __init__(self, arg0):
        self.arg0 = arg0
        # now fill in arguments 1 through 99 with sensible values

class MyClass2(MyClass):
    def __init__(self, arg1):
        """Just like MyClass, but arg0 has a fixed value and arg1 varies"""
        super(MyClass, self).__init__("fixed value")
        self.arg1 = arg1

and so on for as many subclasses that you need.

In the same way, perhaps you can group those arguments. E.g. instead of
this:


class WordProcessingDoc(object):
    def __init__(self, page_width, page_height, left_margin, 
    right_margin, top_margin, bottom_margin, font_face, 
    font_size, font_style, line_size, justification): # and many more
        # and many, many more arguments
        pass


Create some classes, and pass instances of them to the main class:

class CharStyle(object):
    def __init__(self, font_face, font_size, font_style):
        pass
class PageStyle(object):
    def __init__(self, width, height, left, right, top, bottom):
        pass

class WordProcessingDoc(object):
    def __init__(self, pagestyle, charstyle, paragraphstyle):
        pass



> For various reasons I decided to put all the
> parameters in a separate Params class, instances
> of which reset the default values based on keyword
> arguments, like this:
> 
> class Params:
>      def __init__(self,**kwargs):
>          #set lots of default values
>          ...
>          #set the deviations from defaults
>          self.__dict__.update(kwargs)
> 
> Is this a reasonable approach overall?
> (Including the last line.)

(1) If there really is no alternative to a class with many arguments; 
(2) and instances can vary those arguments unpredictably;

then this approach seems reasonable to me. But I really suggest you
rethink your class design.



-- 
Steven.



From bedouglas at earthlink.net  Wed Nov 15 20:11:51 2006
From: bedouglas at earthlink.net (bruce)
Date: Wed, 15 Nov 2006 17:11:51 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <455bad51$0$26230$426a74cc@news.free.fr>
Message-ID: <1a6e01c7091c$34212470$0301a8c0@tmesa.com>

interesting ongoing thread...

i've seen a number of these over the years.. my language is better than your
language!!

i'm sure this question on the php list would have findings/results that are
essentially opposite of what is being discussed here!



-----Original Message-----
From: python-list-bounces+bedouglas=earthlink.net at python.org
[mailto:python-list-bounces+bedouglas=earthlink.net at python.org]On Behalf
Of Bruno Desthuilliers
Sent: Wednesday, November 15, 2006 4:35 PM
To: python-list at python.org
Subject: Re: Python v PHP: fair comparison?


walterbyrd a ?crit :
> Michael Torrie wrote:
>
>
>>Absolutely false.  Most of my standalone, command-line scripts for
>>manipulating my unix users in LDAP are written in PHP, although we're
>>rewriting them in python.
>>
>
>
> I would say that you are one of very few who use PHP for sys-admin
> tasks - and even you have switched to Python. In general, it does not
> seem to me that PHP has caught on as a sys-admin language.
>
> However, as sys-admin scripting langanges go, I would also say that
> Python is far less popular than butt-ugly Perl. Again - just based on
> what I've seen.

Perl is a scripting language. By 'design'. It's meant to be a better
sh+sed+awk. Python is a general purpose programming language meant to
fill the gap between shell scripts and C programs. So Perl is obviously
a better scripting language than Python. The problem is that Q&D
sys-admin scripts tend to become full-blown apps - and then, Perl starts
to suck.
--
http://mail.python.org/mailman/listinfo/python-list



From sturlamolden at yahoo.no  Thu Nov 16 16:09:03 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 16 Nov 2006 13:09:03 -0800
Subject: About alternatives to Matlab
In-Reply-To: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
References: <1161613941.550194.204870@e3g2000cwe.googlegroups.com>
Message-ID: <1163711343.870829.110030@h48g2000cwc.googlegroups.com>

Boris wrote:
> Hi, is there any alternative software for Matlab? Although Matlab is
> powerful & popular among mathematical & engineering guys, it still
> costs too much & not publicly open. So I wonder if there's similar
> software/lang that is open & with comparable functionality, at least
> for numerical aspect. Thanks!

I have used Matlab for years, and has recently changed to Python. In
addition one needs NumPy and Matplotlib, and perhaps SciPy. Other
useful packages are PyGTK for GUI, PyGame for multimedia, PyOpenGL for
3D graphics, Mpi4Py for parallel computation, etc. You will find python
packages for nearly any conceivable task. Unlike Matlab, Python is a
general purpose programming language, and a distant cousin of Lisp. The
Python language is fare more expressive and productive than Matlab, yet
even more easy to use.

The NumPy package is the core requirement for numerical work in Python.
It is quite different form Matlab, but I think it is more powerful.
Particularly, arrays are passed by reference (not by value), and
indexing creates view matrices.

To compare Matlab with NumPy we can e.g. use the D4 discrete wavelet
transform. I have here coded it in Matlab and Python/NumPy using Tim
Swelden's lifting scheme.

First the Matlab version (D4_Transform.m):

function x = D4_Transform(x)
   % D4 Wavelet transform in Matlab
   % (C) Sturla Molden
   C1 =  1.7320508075688772;
   C2 =  0.4330127018922193;
   C3 = -0.066987298107780702;
   C4 =  0.51763809020504137;
   C5 =  1.9318516525781364;
   s1 = zeros(ceil(size(x)/2));
   d1 = zeros(ceil(size(x)/2));
   d2 = zeros(ceil(size(x)/2));
   odd = x(2:2:end);
   even = x(1:2:end-1);
   d1(:) = odd - C2*even;
   s1(1) = even(1) + C2*d1(1) + C3*d1(end);
   s1(2:end) = even(2:end) + C2*d1(2:end) + C3*d1(1:end-1);
   d2(1) = d1(1) + s1(end);
   d2(2:end) = d1(2:end) + s1(1:end-1);
   x(1:2:end-1) = C4*s1;
   x(2:2:end) = C5*d2;
   if (length(x) >2)
      x(1:2:end-1) = D4_Transform(x(1:2:end-1));
   end


Then the Python version (D4.py):

import numpy
import time

def D4_Transform(x, s1=None, d1=None, d2=None):
   """
   D4 Wavelet transform in NumPy
   (C) Sturla Molden
   """
   C1 = 1.7320508075688772
   C2 = 0.4330127018922193
   C3 = -0.066987298107780702
   C4 = 0.51763809020504137
   C5 = 1.9318516525781364
   if d1 == None:
      d1 = numpy.zeros(x.size/2)
      s1 = numpy.zeros(x.size/2)
      d2 = numpy.zeros(x.size/2)
   odd = x[1::2]
   even = x[:-1:2]
   d1[:] = odd[:] - C1*even[:]
   s1[0] = even[0] + C2*d1[0] + C3*d1[-1]
   s1[1:] = even[1:] + C2*d1[1:] + C3*d1[:-1]
   d2[0] = d1[0] + s1[-1]
   d2[1:] = d1[1:] + s1[:-1]
   even[:] = C4 * s1[:]
   odd[:] = C5 * d2[:]
   if x.size > 2:

D4_Transform(even,s1[0:even.size/2],d1[0:even.size/2],d2[0:even.size/2])

if __name__ == "__main__":
   x = numpy.random.rand(2**23)
   t0 = time.clock()
   D4_Transform(x)
   t = time.clock()
   print "Elapsed time is %.6f seconds" % (t-t0)


Now let's do benchmark on my laptop (1.73 GHz Pentium M, 0.99 GB RAM).
I have stopped paying for Matlab maintenance (for reasons that will be
obvious), so I only have R14 Service Pack 2 for comparison.

First we try Matlab (R14 Service Pack 2):

>> x = rand(2^23,1);
>> tic; D4_Transform(x); toc
Elapsed time is 27.145438 seconds.


Then we Python 2.4.4 with NumPy 1.0:

C:\develop\python\D4>python D4.py
Elapsed time is 3.364887 seconds

That is quite astonishing.

If anyone wonders why I think Travis Oliphant and the NumPy team should
be knighted, then this is the answer. The Mathworks' product only
achieved 100% * 3/27 = 11% the speed of Python/NumPy, and is infinitely
more expensive.

Does anyone wonder why I am not paying for Matlab maintenance anymore?

Sorry Mathworks, I have used your product for years, but you cannot
compete with NumPy.


Cheers,
Sturla Molden



From george.sakkis at gmail.com  Sat Nov 18 17:27:03 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Nov 2006 14:27:03 -0800
Subject: Overwrite only one function with property()
References: <mailman.441.1163887594.32031.python-list@python.org>
Message-ID: <1163888823.172705.109520@h54g2000cwb.googlegroups.com>

Kai Kuehne wrote:

> Hi list!
> It is possible to overwrite only one function with the property-function?
>
> x = property(getx, setx, delx, 'doc')
>
> I just want to overwrite setx, but when I set the others to None,
> I can't read and del the member. Any ideas or is this not possible?

There are no default functions for getx, setx, delx; you have to
specify what you expect to happen when you write a.p, a.p = v and del
a.p, respectively. What would, for example, be the default getx that
you don't want to overwrite ?

George



From Thomas.Ploch at gmx.net  Thu Nov 30 17:35:36 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Thu, 30 Nov 2006 23:35:36 +0100
Subject: best way to align words?
In-Reply-To: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
References: <1164925391.696612.64860@80g2000cwy.googlegroups.com>
Message-ID: <456F5CB8.6060508@gmx.net>

Robert R. schrieb:
> Hello,
> 
> i would like to write a piece of code to help me to align some sequence
> of words and suggest me the ordered common subwords of them
> 
> s0 = "this is an example of a thing i would like to have".split()
> s1 = "another example of something else i would like to have".split()
> s2 = 'and this is another " example " but of something ; now i would
> still like to have'.split()
> ...
> alist = (s0, s1, s2)
> 
> result should be : ('example', 'of', 'i', 'would', 'like', 'to', 'have'
> 
> but i do not know how should i start, may be have you a helpful
> suggestion?
> a trouble i have if when having many different strings my results tend
> to be nothing while i still would like to have one of the, or maybe,
> all the best matches.
> 
> best.
> 

As far as I can see, you want to have the words, that all three lists
have in common, right?

s0 = "this is an example of a thing i would like to have".split()
s1 = "another example of something else i would like to have".split()
s2 = 'and this is another " example " but of something ; now i would
still like to have'.split()

def findCommons(s0, s1, s2):
	res = []
	for word in s0:
		if word in s1 and word in s2:
			res.append(word)
	return res

 >>>print findCommons(s0,s1,s2)
 ['example', 'of', 'i', 'would', 'like', 'to', 'have']


From ajones1 at gmail.com  Wed Nov 29 11:41:45 2006
From: ajones1 at gmail.com (Adam Jones)
Date: 29 Nov 2006 08:41:45 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164764454.043697.125730@j72g2000cwa.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
Message-ID: <1164818505.696250.264070@h54g2000cwb.googlegroups.com>


gregarican wrote:
> gavino wrote:
> > wtf
>
> You have to be trolling I would think.

Yeah, gavino has been trolling comp.lang.lisp for quite some time. For
the life of me I can't understand why he would troll comp.lang.python
when comp.lang.lisp is there.

-Adam



From writetosrj at gmail.com  Fri Nov 24 08:00:53 2006
From: writetosrj at gmail.com (srj)
Date: 24 Nov 2006 05:00:53 -0800
Subject: NFS server
Message-ID: <1164373253.607159.26260@j44g2000cwa.googlegroups.com>

i wish to develop an NFS server usin python from scratch( some wise guy
told me i'ts easy!).
can i get any kinda tutorial for this??

any suggestions on how 2 begin?



From fredrik at pythonware.com  Thu Nov 23 08:28:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 23 Nov 2006 14:28:45 +0100
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222><pan.2006.11.23.11.27.54.956445@REMOVE.THIS.cybersource.com.au>
	<Xns98848020C9BB8toreriknpolarno@129.242.5.222>
Message-ID: <ek47md$6fs$1@sea.gmane.org>

Tor Erik Soenvisen wrote:

> I've seen code like this:
>
> if type([]) is list:
>    print 'Is list'
>
> which seem to work. And also I've seen "var is None", as you mention.

None is guaranteed to be a singleton:

    http://effbot.org/pyref/type-none.htm

Why "is" works for type objects should be pretty obvious, of course.

</F> 





From e0427417 at student.tuwien.ac.at  Sat Nov 25 14:57:24 2006
From: e0427417 at student.tuwien.ac.at (Mathias Panzenboeck)
Date: Sat, 25 Nov 2006 20:57:24 +0100
Subject: my small hashlib - using pythons hash-functions
Message-ID: <45689fae$0$11868$3b214f66@tunews.univie.ac.at>

Hi.

I wrote a small hashlib for C. Because I'm new to hashes I looked at pythons implementation and 
reused *some* of the code... or more the mathematical "hash-function", not really the code.

In particular I looked at pythons hash and lookup functions, so I came up with this (see the code 
underneath).

So, can this code be considered as derived and do I have to put my code under the GPL? I'd like to 
publish it under something less restrictive, like a BSD style license. But if GPL is the only way, 
then GPL it is. :)

	-panzi


#define PERTURB_SHIFT 5

static ENTRY_T * lookup(CONTAINER_T * table, hash_const_str_t key,
  int (*loop_cond)(ENTRY_T * ptr, hash_const_str_t key)) {
	register ENTRY_T *   entries = table->entries;
	register hash_size_t size    = table->size;
	register hash_size_t pos     = hash(key) % size;
	register hash_size_t perturb = pos;
	
	register ENTRY_T * ptr = entries + pos;

	while(loop_cond(ptr,key)) {
		pos       = ((pos << 2) + pos + perturb + 1) % size;
		perturb >>= PERTURB_SHIFT;
				
		ptr = entries + pos;
		
#ifdef HASH_COUNT_COLLISIONS
		++ table->collisions;
#endif
	}
	
	return ptr;
}

hash_t hash(register hash_const_str_t str) {
/* python 2.5's hash function: */
	register hash_size_t len;
	register hash_t      h;
	
	assert(str);
	
	len = strlen(str);
	h   = *str << 7;
	
	while (*str)
		h = (1000003 * h) ^ *str ++;
	h ^= len;
	
	return h;
}


From fredrik at pythonware.com  Sun Nov 12 18:08:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Nov 2006 00:08:25 +0100
Subject: Random image text generation?
In-Reply-To: <17751.42143.36842.842728@montanaro.dyndns.org>
References: <mailman.21.1163361663.32031.python-list@python.org>	<DaL5h.287$Ib3.250761@news.siol.net>	<mailman.23.1163365020.32031.python-list@python.org>	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
	<17751.42143.36842.842728@montanaro.dyndns.org>
Message-ID: <ej89h7$mup$1@sea.gmane.org>

skip at pobox.com wrote:

> Another possibility is to run the submissions through SpamBayes and silently
> direct any which score as "unsure" or "spam" to me for review.  Users
> wouldn't even need to know their submissions were being scrutinized.

there's also:

     http://akismet.com/

python interface here:

     http://kemayo.wordpress.com/2005/12/02/akismet-py/

</F>



From timr at probo.com  Fri Nov 17 15:40:57 2006
From: timr at probo.com (Tim Roberts)
Date: Fri, 17 Nov 2006 12:40:57 -0800
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
References: <mailman.277.1163700699.32031.python-list@python.org>	
	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
Message-ID: <455E1E59.4030501@probo.com>

krishnakant Mane wrote:
>>  
> double wow!  as it is my customer wants me to print to the default
> printer.
> can you please help me with the command for rendering the pdf to the
> printer with acrobat using python?

You'll have to use the registry to find "acrord32", but once you find
it, you just do:
    os.system( "\\Program Files\\Adobe\\Acrobat 7.0\\Reader\acrord32.exe
/p xxx.pdf" )
The /p switch requests printing.


> that essentially solves my most important problem.
> else I was thinking to create an excel spreadsheet as a last alternative.
> out of my curocity, I want to know if there are libraries that can
> create excel spreadsheets?

There are several ways.  One way is to just bring up Excel itself and
send it commands via COM.  Several times, I've written my data as a
comma-separated file (which Excel understands), then brought up Excel as
a COM component, loaded the file, then used Excel commands to format the
columns.

There are also a couple of Python modules which purport to be able to
read and write .xls files directly.  There's xlrd, but there's a newer
one whose name escapes me.  I thought it was a pun, like "xlerator," but
that's not right.


> I also wanted to know if there is a common dialog for listing out
> printers under windows?
> so in future if I make this software in GUI, I can at list help the
> user select the printer from the list.

Yes, there is a standard "print" dialog for Windows that shows you the
familiar dialog, with the list of printers and all of the options.  In
wxPython, I believe it is called wx.PrintDialog. 

In Pywin32, win32print.EnumPrinters can give you the list of available
printers.

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.



From walterbyrd at iname.com  Wed Nov 15 10:52:23 2006
From: walterbyrd at iname.com (walterbyrd)
Date: 15 Nov 2006 07:52:23 -0800
Subject: Python v PHP: fair comparison?
In-Reply-To: <4run7sFskcrrU1@mid.individual.net>
References: <1163533126.857007.206300@i42g2000cwa.googlegroups.com>
	<4run7sFskcrrU1@mid.individual.net>
Message-ID: <1163605942.995212.34630@m73g2000cwd.googlegroups.com>


Bjoern Schliessmann wrote:
> walterbyrd wrote:
>
> > - PHP has a lower barrier to entry
>
> Which kind of barrier do you mean -- syntax, availability, ...?
>

Putting php into a web-site is as easy as throwing some php code into a
my html file, and maybe giving the file a php extension. I can get php
hosting for $10 a year easy.

This may not be what you want for a major developement project, but the
barrier to entry is very low.



From fredrik at pythonware.com  Sat Nov 18 12:34:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 18 Nov 2006 18:34:30 +0100
Subject: Python v PHP for web, and restarting Apache?
In-Reply-To: <1163868294.131526.308080@e3g2000cwe.googlegroups.com>
References: <1163783247.077263.8590@j44g2000cwa.googlegroups.com>	<1163810800.915170.48580@e3g2000cwe.googlegroups.com>
	<1163868294.131526.308080@e3g2000cwe.googlegroups.com>
Message-ID: <ejng75$k0b$1@sea.gmane.org>

walterbyrd wrote:

>> Python is much better suited to writing and mainting large web
>> applications though.
> 
> I have to ask: why is that?

modularity, modularity, and modularity.

</F>



From skip at pobox.com  Mon Nov 13 17:16:35 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 13 Nov 2006 16:16:35 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558D443.1030802@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org> <ej2igj$826$1@sea.gmane.org>
	<4554D416.70408@hobbshouse.org> <ej2pa2$vpq$1@sea.gmane.org>
	<4554ECBF.7040603@hobbshouse.org> <ej35ue$52k$1@sea.gmane.org>
	<4558BEC3.3020003@hobbshouse.org> <ejags8$l2u$1@sea.gmane.org>
	<4558D443.1030802@hobbshouse.org>
Message-ID: <17752.61123.582522.727445@montanaro.dyndns.org>


    Mike> But so far, the only response that I've received is that there's
    Mike> that ABC study somewhere and that settles that.

In the absence of a later study that refutes the ABC work, I think it's best
left alone.

Skip


From pavlovevidence at gmail.com  Sun Nov 19 19:11:43 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 19 Nov 2006 16:11:43 -0800
Subject: re.match -- not greedy?
References: <mailman.476.1163979600.32031.python-list@python.org>
Message-ID: <1163981503.295521.7180@m7g2000cwm.googlegroups.com>

EXI-Andrews, Jack wrote:
> the '*' and '+' don't seem to be greedy.. they will consume less in
> order to match a string:
>
> >>> import re;re.match('(a+)(ab)','aaab').groups()
> ('aa', 'ab')
>
> this is the sort of behaviour i'd expect from
>    '(a+?)(ab)'
>
> a+ should greedily consume a's at the expense of the string not matching

It's called backtracking.  If a match fails, the regexp engine
recursively unwinds some of the greedy matching and tries again.

> in real life, i am trying to match #defines:
>
> >>> re.match( '#define ([A-Za-z0-9_]+)([^(])', '#define
> abc(d)').groups()
> ('ab', 'c')
>
> i want this example to fail because the first character after a string
> of letters is a '('
> i want to match only #defines without parameters.

Probably the easiest thing to do is to attempt to match zero or one
opening parentheses, and bail out if it did end up matching the
parenthesis.

m = re.match(r"#define ([A-Za-z0-9_]+)(\(?)","#define abc(d)")
if m and m.groups(2) != "(":
    ...

(BTW, it's good practice to use a raw strings for the regular
expressions as I did.)

> so what's the definition of greedy?

It means match as much you can *while getting a match*.

Just remember regexp parsing is not a one way street: if it hits a dead
end, it'll go back and try another path.  In fact, greediness usually
doesn't affect *whether* a regexp matches; it only affects the
groupings.  I'm suddenly curious if there are any cases at all where
greediness changes whether it finds a match.

> (pls copy me on responses)

Ah, too bad you won't see it then....


Carl Banks



From rpdooling at gmail.com  Sun Nov 19 09:15:38 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 19 Nov 2006 06:15:38 -0800
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
In-Reply-To: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
Message-ID: <1163945738.624543.37730@k70g2000cwa.googlegroups.com>

John (Z R) L wrote:

> But after clicking "run module"

Being new is never problem, but do learn to provide concise, complete
descriptions of exactly what happened and what you were doing at the
time.

Are you in IDLE? Or are you in PythonWin?  OR did you make a script
file and try to run it by double clicking on it?

Sounds like you were creating a script file, then tried to run it?
Search this list at Google Groups comp.lang.python for "keep DOS box
open."

http://tinyurl.com/wh7fy

> Another problem I have is firewall. On my old computer (Windows 98)
> when using Python GUI, it can't run modules because of some firewall.

Please enter the exact error message you get. It's probably some
officious Windows security glitch, but nobody can help you until you
provide the messages you get.

Windows 98? Linux would run twice as fast on any machine old enough to
run Windows 98, and your Python would work better, too. 

Good luck,

rd



From rridge at csclub.uwaterloo.ca  Sun Nov  5 06:06:33 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 5 Nov 2006 03:06:33 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<454bd36c$0$2364$9b622d9e@news.freenet.de>
	<eii1ur$a60$1@news.albasani.net>
	<454ca6b4$0$151$9b622d9e@news.freenet.de>
	<7xpsc33zmh.fsf@ruckus.brouhaha.com>
	<454d587d$0$4361$9b622d9e@news.freenet.de>
	<7x7iyafg85.fsf@ruckus.brouhaha.com>
Message-ID: <1162724793.506671.35730@i42g2000cwa.googlegroups.com>

Paul Rubin wrote:
> I dunno about x86 hardware signals but these instructions do
> read-modify-write operaitons.  That means there has to be enough
> interlocking to prevent two cpu's from updating the same memory
> location simultaneously, which means the CPU's have to communicate.
> See <http://en.wikipedia.org/wiki/MESI_protocol> (I think this is
> how the current x86's do it):

The MESI protocol is used to ensure all read and write operations are
cache coherent, not just locked read-modify-write operations.  Whether
the LOCK prefix is used or not in an instruction normally isn't
externally visable.  From IA-32 Intel? Architecture Software
Developer's Manual Volume 3A: System Programming Guide, Part 1:

    For the Pentium 4, Intel Xeon, and P6 family processors,
    if the area of memory being locked during a LOCK operation
    is cached in the processor that is performing the LOCK operation
    as write-back memory and is completely contained in a cache line,
    the processor may not assert the LOCK# signal on the bus. Instead,
    it will modify the memory location internally and allow it's
    cache coherency mechanism to insure that the operation is carried
    out atomically. This operation is called "cache locking."
    The cache coherency mechanism automatically prevents two or
    more processors that have cached the same area of memory from
    simultaneously modifying data in that area.

The cost of mantaining cache coherency for a locked increment
instruction should be no different than that of an unlocked increment
instruction.

                                             Ross Ridge



From stanc at al.com.au  Fri Nov 17 03:40:49 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Nov 2006 19:40:49 +1100
Subject: popen(1-4) as a seperate process
In-Reply-To: <Xqe7h.7651$L6.5930@newsread3.news.pas.earthlink.net>
References: <455D3F18.40902@al.com.au>	<ejjmm8$q90$1@sea.gmane.org>	<455D5EFE.40803@al.com.au>	<ejjp0u$vel$1@sea.gmane.org>	<mailman.316.1163750026.32031.python-list@python.org>
	<Xqe7h.7651$L6.5930@newsread3.news.pas.earthlink.net>
Message-ID: <455D7591.1070607@al.com.au>



Dennis Lee Bieber wrote:
> On Fri, 17 Nov 2006 18:53:41 +1100, Astan Chee <stanc at al.com.au>
> declaimed the following in comp.lang.python:
>
>
>   
>> What would be a good method to do this? I've tried your 
>> os.system("command&") and the spawned process is still the child of the 
>> current running process (which is not what I want to happen).
>> Thanks again and sorry for the confusion.
>>     
>
> 	The & trailer is UNIX/LINUX specific for detaching a process. There
> may be other commands needed for Windows. Especially as, I think, the &
> syntax can create processes that remain running even if the user logs
> off... Something Windows doesn't really support.
>
> 	Windows os.startfile(...) MIGHT do what you want
>   
Yes I know & works in unix/linux; I thought it worked in windows also.
But thanks, os.startfile() worked perfectly.
Cheers


From john at castleamber.com  Wed Nov 15 22:08:55 2006
From: john at castleamber.com (John Bokma)
Date: 16 Nov 2006 03:08:55 GMT
Subject: Will GPL Java eat into Python marketshare?
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<xqxy7qcz78l.fsf@cola3.ca.boeing.com>
	<Xns987CACBEFEFDCcastleamber@130.133.1.4>
	<455bb047$0$28561$426a74cc@news.free.fr>
Message-ID: <Xns987CD72233D97castleamber@130.133.1.4>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:

> John Bokma a ?crit :
>> Harry George <harry.g.george at boeing.com> wrote:
>>  
>> 
>>>Short answer: People use Python instead of Java because people (at
>>>least intelligent people) tend to avoid pain.
>> 
>> 
>> Intelligent people don't suffer from fanboy sentiments. They just
>> pick a language that works best for them.
>> 
> Which is *exactly* what Harry said...

No, there is a very clear difference if one is willing to see it.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From ddvlad at gmail.com  Tue Nov 14 16:00:35 2006
From: ddvlad at gmail.com (Vlad Dogaru)
Date: 14 Nov 2006 13:00:35 -0800
Subject: BaseHTTPServer - getting POST parameters
Message-ID: <1163538035.160424.3470@e3g2000cwe.googlegroups.com>

Hello,

After experimenting for a while, I am still not able to find where the
POST data is in the BaseHTTPRequestHandler class. I am trying to write
a very simple HTTP server for a project of mine and I need to get the
POST data. Certainly I am missing something, as it is a comon task.

Thanks in advance, 
Vlad



From george.sakkis at gmail.com  Mon Nov 13 10:51:58 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 13 Nov 2006 07:51:58 -0800
Subject: Python development time is faster.
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>
Message-ID: <1163433118.770742.262140@e3g2000cwe.googlegroups.com>

Steven Bethard wrote:

> A simple example from document indexing.  Using Java Lucene to index
> some documents, you'd write code something like::
>
>      Analyzer analyzer = new StandardAnalyzer()
>      IndexWriter writer = new IndexWriter(store_dir, analyzer, true)
>      for (Value value: values) {
>          Document document = Document()
>          Field title = new Field("title", value.title,
>                                  Field.Store.YES,
>                                  Field.Index.TOKENIZED)
>          Field text = new Field("text", value.text,
>                                 Field.Store.YES,
>                                 Field.Index.TOKENIZED)
>          document.add(title)
>          document.add(text)
>      }
>
> Why is this code so verbose?  Because the Lucene Java APIs don't like
> useful defaults. So for example, even though StandardAnalyzer is
> supposedly *Standard*, there's no IndexWriter constructor that includes
> it automatically. Similarly, if you create a Field with a string name
> and value (as above), you must specify both a Field.Store and a
> Field.Index - there's no way to let them default to something reasonable.
>
> Compare this to Python code. Unfortunately, PyLucene wraps the Lucene
> APIs pretty directly, but I've wrapped PyLucene with my own wrapper that
> adds useful defaults (and takes advantages of things like Python's
> **kwargs).  Here's what the same code looks like with my Python wrapper
> to Lucene::
>
>      writer = IndexWriter(store_dir)
>      for value in values:
>          document = Document(title=value.title, text=value.text)out two
>          writer.addDocument(document)
>      writer.close()
>
> Gee, and I wonder why it took me so much longer to write things in Java. ;-)

Oh, the memories... I went down the same road about two years ago,
though I didn't know about PyLucene at the time and wrapped in jython
the parts of Lucene I used... never bothered to deal with java's
verbosity after that. It's a pity that jython resembles abandon-ware
these days, when jRuby showed up pretty recently and is gaining in
penetration with the java crowd. It will be a non-trivial loss for
python if it is left behind in the JVM world (at least if the latter is
not swallowed by the .NET dark forces, which doesn't seem to happen any
time soon ;-).

George



From no at spam.com  Wed Nov  1 16:21:20 2006
From: no at spam.com (Farshid Lashkari)
Date: Wed, 01 Nov 2006 13:21:20 -0800
Subject: Hooking file open
In-Reply-To: <WV72h.85330$CA.46947@fe10.usenetserver.com>
References: <QI62h.828$Hc2.442@newsfe11.phx>
	<WV72h.85330$CA.46947@fe10.usenetserver.com>
Message-ID: <ob82h.830$Hc2.366@newsfe11.phx>

Dale Strickland-Clark wrote:
> You might consider trapping calls to file() too, which is an alias for
> open().

Thanks, I didn't know about that.

> Also, I think I'd do my logging before calling the real function. It depends
> how you want to deal with exceptions. 

I placed the logging after the call to the real function so that files 
that don't exist will not be logged. However, I'm already checking for 
file existence during the post process of the script running, so I guess 
it doesn't really make too much of a difference.

Thanks for the help.

-Farshid


From johnjsal at NOSPAMgmail.com  Tue Nov 14 10:41:53 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Nov 2006 10:41:53 -0500
Subject: refactoring so that multiple changes can be made with one variable?
Message-ID: <4559e396$0$32430$c3e8da3@news.astraweb.com>

My code is below. For now I'm focusing on the lines where health (and 
armor) are increased in each character class. Let's say I decided to 
change the amount of increase in the future. As it is now, I'd have to 
go to each character class and change the number so that each is still 
in a good relation to the other (right now: 3, 2, 1; later: perhaps 4, 
3, 2, 1, if I added a new class -- i.e., change Fighter from 3 to 4, 
Thief from 2 to 3, in other words increase them all by 1). So instead of 
changing each one, is there a simple, clean way of just changing a 
single number so that this change is reflected in all classes? Hope that 
makes sense.



class Character(object):
     def __init__(self, name, strength, dexterity, intelligence):
         self.name = name
         self.health = 10
         self.armor = self.attack = self.defense = self.magic_attack = \
             self.magic_defense = 0
         self.strength = strength
         self.dexterity = dexterity
         self.intelligence = intelligence
         self.adjust_attributes()

     def adjust_attributes(self):
         pass


class Fighter(Character):
     def adjust_attributes(self):
         self.health += 3
         self.armor += 3
         self.attack += 2
         self.defense += 2
         self.strength += 1


class Thief(Character):
     def adjust_attributes(self):
         self.health += 2
         self.armor += 2
         self.attack += 1
         self.defense += 1
         self.magic_defense += 1
         self.dexterity += 1


class Mage(Character):
     def adjust_attributes(self):
         self.health += 1
         self.armor += 1
         self.magic_attack += 2
         self.magic_defense += 2
         self.intelligence += 1


From spe.stani.be at gmail.com  Thu Nov 30 05:34:02 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 30 Nov 2006 02:34:02 -0800
Subject: SPE refuses.
In-Reply-To: <mailman.875.1164880214.32031.python-list@python.org>
References: <mailman.846.1164826327.32031.python-list@python.org>
	<1164828687.755193.4900@l39g2000cwd.googlegroups.com>
	<mailman.857.1164838885.32031.python-list@python.org>
	<1164842145.465496.135210@h54g2000cwb.googlegroups.com>
	<mailman.875.1164880214.32031.python-list@python.org>
Message-ID: <1164882842.357607.75440@16g2000cwy.googlegroups.com>

On 30 nov, 10:50, egbert <egbert.bouw... at hccnet.nl> wrote:
> On Wed, Nov 29, 2006 at 03:15:45PM -0800, SPE - Stani's Python Editor wrote:> Do you have python-wxversion installed?
>
> > $sudo apt-get install python-wxversionThat helped. But why isn't it included in the wxPython download ?
I was surprised as well. I filed a bug report at debian MOTU that spe
depends as well on python-wxversion, so that it is automatically
installed together with spe in the future.

> Anyway, the first screen looks great. I will explore spe.
> Thanks.
You're welcome!

Stani



From environ314 at gmail.com  Wed Nov 22 15:11:44 2006
From: environ314 at gmail.com (Dan)
Date: 22 Nov 2006 12:11:44 -0800
Subject: utf - string translation
In-Reply-To: <1164224962.711265.198090@h48g2000cwc.googlegroups.com>
References: <yR09h.1987$%_2.506@newsfe19.lga>
	<mailman.605.1164221562.32031.python-list@python.org>
	<O319h.1989$%_2.110@newsfe19.lga>
	<Xns9883C1C005EDFduncanbooth@127.0.0.1>
	<mf19h.1992$%_2.1833@newsfe19.lga>
	<1164224962.711265.198090@h48g2000cwc.googlegroups.com>
Message-ID: <1164226304.119425.206380@h54g2000cwb.googlegroups.com>

Thank you for your answers.

In fact, I'm getting start with Python.

I was looking for transform a text through elementary cryptographic
processes (Vigen?re).
The initial text is in a file, and my system is under UTF-8 by default
(Ubuntu)



From steve at holdenweb.com  Mon Nov  6 14:28:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Nov 2006 14:28:59 -0500
Subject: forwarding *arg parameter
In-Reply-To: <%oG3h.107$8a7.65@read3.inet.fi>
References: <6pn3h.125$7b6.98@read3.inet.fi>	<pan.2006.11.05.17.22.45.574488@REMOVE.THIS.cybersource.com.au>	<aop3h.180$7b6.55@read3.inet.fi>
	<2Fp3h.195$7b6.100@read3.inet.fi>	<eilc3m$301a$1@ulysses.news.tiscali.de>	<y2r3h.244$7b6.238@read3.inet.fi>	<pan.2006.11.06.11.00.27.698988@REMOVE.THIS.cybersource.com.au>
	<%oG3h.107$8a7.65@read3.inet.fi>
Message-ID: <eio2bi$lqt$1@sea.gmane.org>

Tuomas wrote:
> Steven D'Aprano wrote:
> 
>>On Sun, 05 Nov 2006 19:35:58 +0000, Tuomas wrote:
>>
>>
>>
>>>Thanks. My solution became:
>>>
>>>
>>>>>>def flattern(arg):
>>>
>>>...     result = []
>>>...     for item in arg:
>>>...         if isinstance(item, (list, tuple)):
>>>...             result.extend(flattern(item))
>>>...         else:
>>>...             result.append(item)
>>>...     return tuple(result)
>>>...
>>>
>>>>>>def g(*arg):
>>>
>>>...     arg = flattern(arg)
>>>...     return arg
>>>...
>>>
>>>>>>def f(*arg):
>>>
>>>...     return g(arg)
>>>...
>>>
>>>>>>f('foo', 'bar')
>>>
>>>('foo', 'bar')
>>
>>
>>
>>That's the most complicated do-nothing function I've ever seen. Here is a
>>shorter version:
>>
>>def shortf(*args):
>>    return args
>>
>>
>>
>>
>>>>>f('foo', 'bar')
>>
>>('foo', 'bar')
>>
>>
>>>>>shortf('foo', 'bar')
>>
>>('foo', 'bar')
>>
>>
>>
>>>>>f(1,2,3,4)
>>
>>(1, 2, 3, 4)
>>
>>
>>>>>shortf(1,2,3,4)
>>
>>(1, 2, 3, 4)
>>
>>
>>
>>>>>f({}, None, 1, -1.2, "hello world")
>>
>>({}, None, 1, -1.2, 'hello world')
>>
>>
>>>>>shortf({}, None, 1, -1.2, "hello world")
>>
>>({}, None, 1, -1.2, 'hello world')
>>
>>Actually, they aren't *quite* identical: your function rips lists apart,
>>which is probably not a good idea.
>>
>>
>>
>>>>>f("foo", [1,2,3], None) # three arguments turns into five
>>
>>('foo', 1, 2, 3, None)
>>
>>
>>>>>shortf("foo", [1,2,3], None) # three arguments stays three
>>
>>('foo', [1, 2, 3], None)
>>
>>
>>
>>I still don't understand why you are doing this. Can we have an example of
>>why you think you need to do this?
> 
> 
> If i redefine the function g the difference comes visible:
> 
>   >>> def g(*arg):
> ....     if with_flattern: arg=flattern(arg)
> ....     return arg
> 
>  >>> with_flattern=False
>  >>> f('foo', 'bar')
> (('foo', 'bar'),)
>  >>> with_flattern=True
>  >>> f('foo', 'bar')
> 
> If you read the whole chain you find out what we were talking of.
> 
> TV

Suppose you did actually want to do this you have chosen about the worst 
possible way: the use of global variables to condition function 
execution is a sure way to get into trouble. Consider if somebody else 
want to use your function: they also have to set a global in their 
program to avoid your function raising an exception.

Fortunately Python has just the thing to make such horrors unnecessary: 
the default argument value. Try something like this (untested):

def g(flattening=True, *arg):
     if flattening:
	arg = flatten(arg)
     return arg

Obviously you could use either True or False for the default value. In 
the case above the function flattens by default. You could also, if you 
wished, have f() take the flattening argument, and always pass it to g().

Nothing very sophisticated here, just something to help you flex your 
growing Python and programming muscles.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From prouleau001 at gmail.com  Thu Nov 16 11:03:48 2006
From: prouleau001 at gmail.com (prouleau001 at gmail.com)
Date: 16 Nov 2006 08:03:48 -0800
Subject: atexit.register does not return the registered function. IMHO,
	it should.
Message-ID: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>

Hi all!

Since that the decorator syntax is upon us, I think it would be good if
atexit.register() was returning the function passed as argument.  This
simple change to the library would solve a problem with the use of
atexit.register as a decorator (and I can't think of any use case where
this change would break any code).

I describe the problem in the following text.

Problem using atexit.register as a decorator
============================================

In his April 2005 article titled `Python 2.4 Decorators: Reducing code
duplication and consolidating knowledge`_ , Phillip Eby describes how
you can use `atexit.register()`_ from the standard Python library. He
shows how to use the decorator syntax to register a function that will
execute at program termination. Here is how it goes::

  @atexit.register
  def goodbye():
      print "Goodbye, terminating..."


However, there is one fundamental problem with this: atexit.register()
returns None. Since the above code corresponds to::


  def goodbye():
      print "Goodbye, terminating..."
  goodbye = atexit.register(goodbye)

the code registers goodbye but right after it binds goodbye to None!
You can see this in the following session::

    >>> import atexit
    >>> @atexit.register
    ... def goodbye():
    ...   print "Goodbye, terminating..."
    ...
    >>> goodbye()
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    TypeError: 'NoneType' object is not callable
    >>>
    >>> goodbye
    >>> type(goodbye)
    <type 'NoneType'>
    >>>

There is two solutions to this problem:

  1. Use another function to register and decorate.
  2. Change atexit.register() in the Python library so that
     it returns the function it registers.

Solution 1 can be implemented right away::

  def atexit_register(fct):
      atexit.register(fct)
      return fct

  @atexit_register
  def goodbye2():
      print "Goodbye 2!!"

and it works: it registers the function for execution at termination
but leaves goodbye2 callable::

  >>> def atexit_register(fct):
  ...   atexit.register(fct)
  ...   return fct
  ...
  >>> @atexit_register
  ... def goodbye2():
  ...   print "Goodbye 2!!"
  ...
  >>> goodbye2()
  Goodbye 2!!
  >>> goodbye2
  <function goodbye2 at 0x009DD930>
  >>>

.. References

.. _atexit.register():
http://www.python.org/doc/current/lib/module-atexit.html
.. _Python 2.4 Decorators\: Reducing code duplication and consolidating
knowledge:  http://www.ddj.com/184406073



From greenbergj at NOSPAMwit.edu  Mon Nov 27 13:50:53 2006
From: greenbergj at NOSPAMwit.edu (Jordan Greenberg)
Date: Mon, 27 Nov 2006 13:50:53 -0500
Subject: python skipping lines?
In-Reply-To: <1164651477.588728.294490@14g2000cws.googlegroups.com>
References: <1164651477.588728.294490@14g2000cws.googlegroups.com>
Message-ID: <456B338D.4050408@NOSPAMwit.edu>

lisa.engblom at gmail.com wrote:
> Hi,
<SNIP>
> Any ideas of what could be the problem?
> 

Hard to say without seeing your code.

Jordan Greenberg

-- 
Posted via a free Usenet account from http://www.teranews.com



From tgrav at mac.com  Thu Nov 16 15:35:00 2006
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 16 Nov 2006 15:35:00 -0500
Subject: pyfits problem
Message-ID: <4509DD3E-5112-409C-B0E0-07649E6DC12B@mac.com>

I am trying to load in a fits-image and get this error

wiyn05dec/n1 -> display -i obj062.fits
Traceback (most recent call last):
   File "/Users/tgrav/Work/Astronomy/MyCode/Python/Redspit/ 
display.py", line 48, in ?
     main()
   File "/Users/tgrav/Work/Astronomy/MyCode/Python/Redspit/ 
display.py", line 30, in main
     im  = pyfits.getdata(options.infname)
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/site-packages/pyfits/NP_pyfits.py", line 4645, in getdata
     _data = hdu.data
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/site-packages/pyfits/NP_pyfits.py", line 2058, in __getattr__
     self.data = np.array(raw_data, type=np.Float32)
AttributeError: 'module' object has no attribute 'Float32'

I am using numpy 1.0rc3 and ActivePython 2.4.3 Build 11.
Anyone know what is going on?

Cheers
    Tommy


From ronrsr at gmail.com  Sun Nov 19 05:14:45 2006
From: ronrsr at gmail.com (ronrsr)
Date: 19 Nov 2006 02:14:45 -0800
Subject: Why isn't SPLIT splitting my strings
Message-ID: <1163931285.390782.130500@h54g2000cwb.googlegroups.com>

I'm trying to break up the result tuple into keyword phrases.  The
keyword phrases are separated by a ;  -- the split function is not
working the way I believe it should be. Can anyone see what I"m doing
wrong?

bests,

-rsr-



 print "newstring =", str(result[i][0])
        print "just split", str(result[i][0]).split('; ()[]"')
        zd.append(str(result[i][0]).split('; ()[]"'))


result= (('Agricultural subsidies; Foreign aid',), ('Agriculture;
Sustainable Agriculture - Support; Organic Agriculture; Pesticides, US,
Childhood Development, Birth Defects; Toxic Chemicals',),
('Antibiotics, Animals',), ('Agricultural Subsidies, Global Trade',),
('Agricultural Subsidies',), ('Biodiversity',), ('Citizen Activism',),
('Community Gardens',), ('Cooperatives',), ('Dieting',), ('Agriculture,
Cotton',), ('Agriculture, Global Trade',), ('Pesticides, Monsanto',),
('Agriculture, Seed',), ('Coffee, Hunger',), ('Pollution, Water,
Feedlots',), ('Food Prices',), ('Agriculture, Workers',), ('Animal
Feed, Corn, Pesticides',), ('Aquaculture',), ('Chemical Warfare',),
('Compost',), ('Debt',), ('Consumerism',), ('Fear',), ('Pesticides, US,
Childhood Development, Birth Defects',), ('Corporate Reform,
Personhood (Dem. Book)',), ('Corporate Reform,  Personhood, Farming
(Dem. Book)',), ('Crime Rates, Legislation, Education',), ('Debt,
Credit Cards',), ('Democracy',), ('Population, World',), ('Income',),
('Democracy, Corporate



partial results:

string a =  Agricultural subsidies; Foreign aid
newstring = Agricultural subsidies; Foreign aid
just split ['Agricultural subsidies; Foreign aid']
newstring = Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals
just split ['Agriculture; Sustainable Agriculture - Support; Organic
Agriculture; Pesticides, US, Childhood Development, Birth Defects;
Toxic Chemicals']
newstring = Antibiotics, Animals
just split ['Antibiotics, Animals']



From fredrik at pythonware.com  Fri Nov 17 12:39:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 18:39:29 +0100
Subject: Slicing / subsetting list in arbitrary fashion
In-Reply-To: <455DEA24.1060906@lind-beil.net>
References: <455DEA24.1060906@lind-beil.net>
Message-ID: <ejks4g$vdf$1@sea.gmane.org>

Gregg Lind wrote:

> One difficulty I am having with using Python for scientific computing is 
> that I cannot figure out good ways to get arbitrary (unpatterned?) slices.

> In Python, solutions I have found for these tasks are:
> 
> [vals[ii]  for ii in wanted]    # task 1
> 
> [a[1]  for  in zip(Truths,vals) if  a[0] ]      # task 2

array objects have "take" and "put" methods; see e.g. (random google link):

     http://stsdas.stsci.edu/numarray/Doc/node33.html

</F>



From nateastle at gmail.com  Sat Nov 18 10:08:47 2006
From: nateastle at gmail.com (nateastle at gmail.com)
Date: 18 Nov 2006 07:08:47 -0800
Subject: basic python questions
In-Reply-To: <18C7h.72$_H5.25@tornado.texas.rr.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
	<18C7h.72$_H5.25@tornado.texas.rr.com>
Message-ID: <1163862527.042015.63400@k70g2000cwa.googlegroups.com>

I am currently going to school at Utah Valley State College, the course
that I am taking is analysis of programming languages. It's an upper
division course but our teacher wanted to teach us python as part of
the course, he spent about 2 - 3 weeks on python which has been good. I
currently work with .net and it is fun to see what other languages have
and what sytax they use.

Paul McGuire wrote:
> <nateastle at gmail.com> wrote in message
> news:1163829271.660193.70450 at j44g2000cwa.googlegroups.com...
> >I have a simple assignment for school but am unsure where to go. The
> > assignment is to read in a text file, split out the words and say which
> > line each word appears in alphabetical order. I have the basic outline
> > of the program done which is:
> >
>
> And in general, this is one of the best "can anyone help me with my
> homework?" posts I've ever seen.
> A. You told us up front that it was your homework.
> B. You made an honest stab at the solution before posting, and posted the
> actual code.
> C. You ended with some specific questions on things that didn't work or that
> you wanted to improve.
>
> Your current program looks like at least A- material.  Add use of sorted and
> enumerate, and handle that exception a little better, and you're getting
> into A+ territory.
>
> Out of curiosity, what school are you attending that is teaching Python, and
> under what course of study?
> 
> -- Paul



From sjmachin at lexicon.net  Mon Nov 13 00:37:59 2006
From: sjmachin at lexicon.net (John Machin)
Date: 12 Nov 2006 21:37:59 -0800
Subject: how do i map this?
In-Reply-To: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
References: <1163387481.135930.167580@m7g2000cwm.googlegroups.com>
Message-ID: <1163396278.936455.48200@h54g2000cwb.googlegroups.com>

ronrsr wrote:
> I think I am passing the wrong argument to the Print_row routine:

Well, yes,  that is what the error message is telling you.
It is also what Fredrik Lundh told you only a couple of hours ago.
He also told you what to do to fix it, at a high level.
Below is my attempt to explain at a lower level.
If you don't understand, please *reply* to my message; *don't* start a
new topic as though it were a totally fresh problem.

Now read on ...

>
>
>
> Traceback (most recent call last):
>   File "index.py", line 91, in ?
>     zhtml.print_row(record)
>   File "/usr/www/users/homebase/realprogress/zingers/zhtml.py", line
> 154, in pri
> nt_row
>     print """<tr>
> TypeError: format requires a mapping
> homebase at upsilon%
>
>
>
> routine from zhtml.py:
>
> #row is a dictionary with keys: zid, keywords, citation, quotation
> def print_row(row):
>    print """<tr>
>       <td class="pad">%(keywords)s
>       </td>
>       <td class="pad">%(quotation)s
>       </td>
>       <td class="pad">%(citation)s
>       </td>
>       <td class="pad" align="center"><form action="update.py"
> name="updateform" enctype="application/x-www-form-urlencoded"
> method="GET"><input type="hidden" name="zid" value="%(zid)d"><input
> type="submit" value="Edit"></form>
>       </td>
>       </tr>
>       """

This cannot be the code that was executed -- it would need to be
followed by
    % row
for it to produce the error message that you received.

>
>
> code from index.py:
>
>
> cursor.execute(querystring);
> # get the resultset as a tuple
> result = cursor.fetchall()
> # iterate through resultset
> for record in result:
>       print record[0] , "-->", record[1]

"record" looks like a tuple, not a dictionary.

>
> #zq = zc.query(querystring).dictresult()
>
> #HTML
>
> import zhtml
> zhtml.print_start_html()
> zhtml.print_header("Frankie's Zingers")
>
> if form.has_key("printview"):
>    print ("xxxxthenxxxxxx")
>    zhtml.printp_start_table()
>    zhtml.printp_title_row()
>    for record in result:
>       zhtml.printp_row(record[row])
> else:
> #   print ("xxxxxelsexxxxx",record[1]);
>    zhtml.print_top_controls(k=k,c=c,q=q)
>    zhtml.print_start_table()
>    zhtml.print_title_row()
>    zhtml.print_search_row(k=k,c=c,q=q)
>    for record in result:
>
>
>       print(record);

print is a statement, not a function; you meant
    print record
Instead of that, do this
    print type(record)
    print repr(record)

You will find that "record" is a tuple, not a dictionary
Without changing the code in the zhtml module, you need to make a
dictionary, for example (untested):

adict = {}
for key, inx in zip("zid keywords citation quotation".split(), (0, 1,
2, 3)):
    adict[key] = record[inx]
zhtml.print_row(adict)
where (0, 1, 2, 3) are the positions of the 4 fields in record --
change the numbers as necessary to match reality.

Alternatively (sketch):

(1) unpack the tuple e.g.
 zid, keywords, citation, quotation = record
# Add names for any other fields that exist.
# Change the order as necessary to match reality.
(2) call a changed zhtml routine:
zhtml.print_row(zid, keywords, citation, quotation)
(3) re-jig the zhtml.print_row routine
 def print_row(zid, keywords, citation, quotation):
    print """<tr>
       <td class="pad">%s
       </td>
       <td class="pad">%s
etc etc
    """ % (keywords, quotation, citation, zid)

>       zhtml.print_row(record)
> 
> zhtml.print_end_table()
> zhtml.print_end_html()

HTH,
John



From fredrik at pythonware.com  Thu Nov 16 06:22:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Nov 2006 12:22:29 +0100
Subject: split CSV fields
In-Reply-To: <1163675506.590469.251910@h48g2000cwc.googlegroups.com>
References: <ejhduq$l5l$1@news.albasani.net>	<mailman.238.1163673019.32031.python-list@python.org>	<1163674830.440318.246920@f16g2000cwb.googlegroups.com>
	<1163675506.590469.251910@h48g2000cwc.googlegroups.com>
Message-ID: <ejhhlk$ua4$1@sea.gmane.org>

John Machin wrote:

> Given Peter Otten's post, looks like
> (1) there's a bug in the "fmtparam" mechanism -- it's ignoring the
> escapechar in my first twiddle, which should give the same result as
> Peter's.
> (2)
> | >>> csv.excel.doublequote
> True
> According to my reading of the docs:
> """
> doublequote
> Controls how instances of quotechar appearing inside a field should be
> themselves be quoted. When True, the character is doubled. When False,
> the escapechar is used as a prefix to the quotechar. It defaults to
> True. 
> """
> Peter's example should not have worked.

the documentation also mentions a "quoting" parameter that "controls 
when quotes should be generated by the writer and recognised by the 
reader.".  not sure how that changes things.

anyway, it's either unclear documentation or a bug in the code.  better 
submit a bug report so someone can fix one of them.

</F>



From jorge.vargas at gmail.com  Fri Nov 10 09:52:25 2006
From: jorge.vargas at gmail.com (Jorge Vargas)
Date: Fri, 10 Nov 2006 10:52:25 -0400
Subject: manual eggs downloads?
In-Reply-To: <xqxpsbvjsmk.fsf@cola3.ca.boeing.com>
References: <xqxpsbvjsmk.fsf@cola3.ca.boeing.com>
Message-ID: <32822fe60611100652u63430d6cm4c9f405b1a28e10d@mail.gmail.com>

On 11/10/06, Harry George <harry.g.george at boeing.com> wrote:
> "eggs" are wonderful for no-hassle get-all-the-dependencies.  However,
> they can trigger hands-off downloads from various sites.  This is Bad
> News for corporate environments in which every download is carefully
> pre-approved.
>
> A tarball with a subdirectory of "third_party" packages is ok.  A web
> page simple listing the third party sites and the recommended
> downloads is ok.  Automatically downloading is not ok.
>
> Is there some way in the eggs mechanism to just get a list of the
> proposed downloads, and let the user take the actions manually?
>
that is not implemented yet, also you may want to take this to the
distutils-sig list.

what you can do is read the egg's setup.py for it's dependencies, but
this can turn into something like red hat's dep hell.

> --
> Harry George
> PLM Engineering Architecture
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steve at holdenweb.com  Mon Nov  6 21:19:20 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Nov 2006 21:19:20 -0500
Subject: assigning values in __init__
In-Reply-To: <454faf57$0$12993$c3e8da3@news.astraweb.com>
References: <454faf57$0$12993$c3e8da3@news.astraweb.com>
Message-ID: <eioqcu$2j7$1@sea.gmane.org>

John Salerno wrote:
> Let's say I'm making a game and I have this base class:
> 
> class Character(object):
> 
>      def __init__(self, name, stats):
>          self.name = name
>          self.strength = stats[0]
>          self.dexterity = stats[1]
>          self.intelligence = stats[2]
>          self.luck = stats[3]
> 
> Is this a good way to assign the values to the different attributes? 
> Should 'stats' be a list/tuple (like this), or should I do *stats instead?
> 
> I'm trying to think ahead to when I might want to add new attributes, 
> and I want to make sure this doesn't get crazy with individual 
> parameters instead of just the one list.
> 
> Or maybe there's some way to loop through two lists (the stats and the 
> attributes) and assign them that way? I was thinking of a nested for 
> statement but that didn't seem to work.

If your program deals with 4-element tuples then although you *could* 
use *stats in your calls to pass each element of the tuple as a single 
argument, that's not really necessary. A way to write the 
initializations you want without using indexing is:

class Character(object):

      def __init__(self, name, stats):
          self.name = name
          self.strength, self.dexterity, \
          self.intelligence, self.luck = stats

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From bj_666 at gmx.net  Mon Nov  6 05:11:41 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 06 Nov 2006 11:11:41 +0100
Subject: Python Distilled
References: <1162790565.418382.237050@m73g2000cwd.googlegroups.com>
Message-ID: <pan.2006.11.06.10.11.35.335058@gmx.net>

In <1162790565.418382.237050 at m73g2000cwd.googlegroups.com>, Simon Wittber
wrote:

> I'd also like to remove any deprecated or stuff which is left in for
> backwards functionality (eg Classic classes).

Classic classes are still needed for exceptions:

>>> class E(object):
...    pass
...
>>> raise E
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: exceptions must be classes, instances, or strings (deprecated),
not type

Ciao,
	Marc 'BlackJack' Rintsch


From mike.klaas at gmail.com  Tue Nov 28 16:42:35 2006
From: mike.klaas at gmail.com (Klaas)
Date: 28 Nov 2006 13:42:35 -0800
Subject: How to increase the speed of this program?
In-Reply-To: <1164741116.583861.278220@l12g2000cwl.googlegroups.com>
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
	<ekh10m$9sh$00$2@news.t-online.com>
	<1164714786.086910.288450@45g2000cws.googlegroups.com>
	<mailman.801.1164715357.32031.python-list@python.org>
	<1164739788.335821.239100@n67g2000cwd.googlegroups.com>
	<1164741116.583861.278220@l12g2000cwl.googlegroups.com>
Message-ID: <1164750155.735437.37680@n67g2000cwd.googlegroups.com>


Klaas wrote:

> In fact, you can make it about 4x faster by balancing:
>
> [klaas at worbo ~]$ python -m timeit -s "from array import array"
> "array('c','\0'*200)*500"
> 10000 loops, best of 3: 32.4 usec per loop

This is an unclean minimally-tested patch which achieves reasonable
performance (about 10x faster than unpatched python):

$ ./python -m timeit -s "from array import array" "array('c',
'\0')*100000"
10000 loops, best of 3: 71.6 usec per loop

You have my permission to use this code if you want to submit a patch
to sourceforge (it needs, proper benchmarking, testing, and tidying).

-Mike

Index: Modules/arraymodule.c
===================================================================
--- Modules/arraymodule.c       (revision 52849)
+++ Modules/arraymodule.c       (working copy)
@@ -680,10 +680,29 @@
                return NULL;
        p = np->ob_item;
        nbytes = a->ob_size * a->ob_descr->itemsize;
-       for (i = 0; i < n; i++) {
-               memcpy(p, a->ob_item, nbytes);
-               p += nbytes;
-       }
+
+        if (n) {
+          Py_ssize_t chunk_size = nbytes;
+          Py_ssize_t copied = 0;
+          char *src = np->ob_item;
+
+          /* copy first element */
+          memcpy(p, a->ob_item, nbytes);
+          copied += nbytes;
+
+          /* copy exponentially-increasing chunks */
+          while(chunk_size < (size - copied)) {
+            memcpy(p + copied, src, chunk_size);
+            copied += chunk_size;
+            if(chunk_size < size/10)
+              chunk_size *= 2;
+          }
+          /* copy remainder */
+          while (copied < size) {
+            memcpy(p + copied, src, nbytes);
+            copied += nbytes;
+          }          
+        }
        return (PyObject *) np;
 }



From sthompson at creativewebnet.com  Fri Nov 24 10:48:15 2006
From: sthompson at creativewebnet.com (Steve Thompson)
Date: Fri, 24 Nov 2006 10:48:15 -0500
Subject: Active State and Komodo...
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
Message-ID: <pan.2006.11.24.15.48.05.346309@creativewebnet.com>

On Fri, 24 Nov 2006 06:35:21 -0500, Steve Thompson wrote:

> Hello all,
> 
> I was wondering the differnced there were betwee Active State's python and
> the open source version of python. Would I have to unistall my opend souce
> python? Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
> unler SuSE Linux v. 10.i?
> 
> Addionally, is the eric IDE (version 3) an acceptible IDE or are there
> more easy and more productive IDE's for perl?
> 
> I'm urining Gnome v. 12.2.2 and Eric v 3.8.1
> 
> Thanks Steve

Sorry, it was too early in the morning when I wrote this. The last 2
paragraphs should read "Addionally, is the eric IDE (version 3) an acceptible IDE or are there
more easy and more productive IDE's for python?".

"I'm using Gnome v. 12.2.2 and Eric v 3.8.1"

Thanks again,

Steve


From duncan.booth at invalid.invalid  Sun Nov 12 04:55:53 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Nov 2006 09:55:53 GMT
Subject: explicit self revisited
References: <ej5fuv$a4a$1@online.de>
	<Bot5h.5910$ig4.165@newsread2.news.pas.earthlink.net>
	<mailman.2123.1163292947.11739.python-list@python.org>
	<bGA5h.5743$L6.3061@newsread3.news.pas.earthlink.net>
Message-ID: <Xns9879650578544duncanbooth@127.0.0.1>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> On Sun, 12 Nov 2006 01:55:35 +0100, Fredrik Lundh
><fredrik at pythonware.com> declaimed the following in comp.lang.python:
> 
> 
>> 
>> ah, good point.  I've updated the FAQ.
>>
>      Ah, but do we dare update the Wikipedia link to include Python as a
> language capable of COMEFROM? <G>

Somebody definitely should. The current wikipedia article contains an 
example in a hypothetical dialect of BASIC ('because an actual example in 
INTERCAL would be too difficult to read'). Somebody should enhance the 
article with the equivalent example in Python which is both easy to read 
and can actually be run:

from goto import goto, comefrom, label

comefrom .repeat
name = raw_input('what is your name? ')
if name:
    print "Hello",name
    label .repeat

print "Goodbye!"



From elicriffield at gmail.com  Mon Nov 13 11:11:28 2006
From: elicriffield at gmail.com (Eli Criffield)
Date: 13 Nov 2006 08:11:28 -0800
Subject: tab compleation input
Message-ID: <1163434288.421441.48320@f16g2000cwb.googlegroups.com>


Here is what i want to do. I have a question in my program, and i want
to do tab completion for the valid answers.

Say i have :
--snip--
validanswers = [ 'yes', 'no', 'maybe', 'tuesday', 'never' ]

#and i ask

sys.stdout.write("Answer the Question: ")
answer = sys.stdin.readline().rstrip()
if answer not in valid answers:
  print "Wrong!"
--snip--

But what i want is when i enter the answer i can hit tab and it'll
complete one of the validanswers
I know i can do tab complete with readline and 'raw_input('> ')' but
that's only to execute python commands right?

Eli



From wiggly at wiggly.org  Tue Nov 14 09:20:07 2006
From: wiggly at wiggly.org (Nigel Rantor)
Date: Tue, 14 Nov 2006 14:20:07 +0000
Subject: modules and generated code
Message-ID: <4559D097.5090609@wiggly.org>


Hi all,

Python newbie here with what I hope is a blindingly obvious question 
that I simply can't find the answer for in the documentation.

So, if I have a tool that generates python code for me (in my case, 
CORBA stubs/skels) in a particular package is there a way of placing my 
own code under the same package hierarchy without all the code living in 
the same directory structure.

Ideally I would like something like the following:

package_dir/
	top_level_package/
		generated_code_package/
		implementation_code_package/

but have two distinct directories that hold them so that I can simply 
delete the generated code and regenerate it without worrying that 
anything got left behind.

So, I want something like:

generated_package_dir/
	top_level_package/
		generated_code_package/

implementation_package_dir/
	top_level_package/
		implementation_code_package/

Whilst I can create this structure, and add 'generated_package_dir' and 
'implementation_package_dir' to PYTHONPATH the fact that both 
directories contain 'top_level_package' seems to be causing clashes, 
perhaps because there are multiple __init__.py files for 
'top_level_package'?

I know that this is possible in Java, Perl and C++ so I am finding it 
hard to believe I can't do the same in Python, I just think I'm too new 
to know how.

I have spent most of this morning searching through all the docs I can 
find, searching on USENET and the web to no avail.

Any help or pointers greatly appreciated.

Regards,

   n


From kibleur.christophe at gmail.com  Thu Nov 23 04:36:56 2006
From: kibleur.christophe at gmail.com (Tool69)
Date: 23 Nov 2006 01:36:56 -0800
Subject: Finding the carret position in a regular expression
Message-ID: <1164274616.881372.276400@l39g2000cwd.googlegroups.com>

Hi,
supposed I've got the following text :

mytext = "for <myvar> in <somelist>:"

with the following simple pattern : pattern = "<[a-z]+>"

I use re.findall(pattern, mytext) wich returns :
['<myvar>','<somelist>']

Now, I want my prog to return the positions of the returned list
elements, ie :
<myvar> was found at position 5 in mytext
<somelist> was found at position 16 in mytext

How can I implement this ? Sorry if it's trivial, that's the first time
I use regular expressions.
Thanks,
6Tool9



From mpeters42 at gmail.com  Sat Nov 18 12:58:06 2006
From: mpeters42 at gmail.com (Mark Peters)
Date: 18 Nov 2006 09:58:06 -0800
Subject: basic python questions
In-Reply-To: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
References: <1163829271.660193.70450@j44g2000cwa.googlegroups.com>
Message-ID: <1163872686.136760.311450@h54g2000cwb.googlegroups.com>

nateastle at gmail.com wrote:

>     dict = {}

As a general rule you should avoid variable names which shadow built in
types (list, dict, etc.).  This can cause unexpected behavior later on.

Also, variable names should be more descriptive of their contents.

Try word_dict or some such variant



From mailtogops at gmail.com  Mon Nov 13 14:12:09 2006
From: mailtogops at gmail.com (mailtogops at gmail.com)
Date: 13 Nov 2006 11:12:09 -0800
Subject: HTML Parsing and Indexing
Message-ID: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>

Hi All,

    I am involved in one project which tends to collect news
information published on selected, known web sites inthe format of
HTML, RSS, etc and sortlist them and create a bookmark on our website
for the news content(we will use django for web development). Currently
this project is under heavy development.

I need a help on HTML parser.

I can download the web pages from target sites. Then I have to start
doing parsing. Since they all html web pages, they will have different
styles, tags, it is very hard for me to parse the data. So what we plan
is to have one or more rules for each website and run based on rule. We
can even write some small amount of code for each web site  if
required. But Crawler, Parser and Indexer need to run unattended. I
don't know how to proceed next..

I saw a couple of python parsers like pyparsing, yappy, yapps, etc but
they havn't given any example for HTML parsing. Someone recommended
using "lynx" to convert the page into the text and parse the data. That
also looks good but still i end of writing a huge chunk of code for
each web page.

What we need is,

One nice parser which should work on HTML/text file (lynx output) and
work based on certain rules and return us a result (Am I need magix to
do this :-( )

Sorry about my english..

Thanks & Regards,

Krish



From jm.suresh at gmail.com  Mon Nov 13 06:08:05 2006
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 13 Nov 2006 03:08:05 -0800
Subject: Data structure for ordered sequence
In-Reply-To: <mailman.50.1163412604.32031.python-list@python.org>
References: <1163410449.081226.49270@i42g2000cwa.googlegroups.com>
	<mailman.50.1163412604.32031.python-list@python.org>
Message-ID: <1163416085.099968.185390@b28g2000cwb.googlegroups.com>


Fredrik Lundh wrote:
> jm.suresh at no.spam.gmail.com wrote:
>
> >  I am looking for a data structure to hold rectangles in a 2d space.
> > Please point me to any module which does these operations:
> >  Insert a rectangle into a particular co-ordinate.
> >  Get the rectangle/s right/left/above/below side to a particular
> > rectangle.
> >  Get all the rectangles within a box
> >  Delete a particular rectangle.
>
> how many rectangles do you plan to store in this structure?
> 
> </F>

Around 150 max

Thanks for the response.
--
Suresh



From martin at v.loewis.de  Mon Nov 20 01:55:23 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 20 Nov 2006 07:55:23 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <1163992410.229236.60830@e3g2000cwe.googlegroups.com>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
	<3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>
	<4560E3AE.5030307@v.loewis.de>
	<1163992410.229236.60830@e3g2000cwe.googlegroups.com>
Message-ID: <4561515B.4060106@v.loewis.de>

Ross Ridge schrieb:
> Martin v. L?wis wrote:
>> One approach I had been considering is to always make the decoding
>> succeed, by using the private-use-area of Unicode to represent bytes
>> that don't decode correctly.
> 
> That would conflict with private use characters appearing in file
> names.

Not necessarily: they could get escaped.

AFAICT, you can have that conflict only if the file system encoding
is UTF-8: otherwise, there is no way to represent them.

> Personally, I think os.listdir() should return the file names only in
> Unicode if they're actually stored that way in the underlying file
> system (eg. NTFS), otherwise return them as byte strings.  I doubt
> anyone in this thread would like that, though.

So I assume you would not want to allow to pass Unicode strings
to open(), stat() etc. either, as the _real_ file system API requires
byte strings there, as well?

People would indeed see that as a step backwards. If you don't want
Unicode strings returned from listdir, don't pass Unicode string
as the directory name.

Technically, how do you determine whether the underlying file
system stores file names "in Unicode"? Does OSX use Unicode
(it requires path names to be UTF-8)? After all, each and
every encoding is a Unicode encoding - that was a design
goal of Unicode.

Regards,
Martin


From nick-news at net4u.hr  Fri Nov 24 13:50:12 2006
From: nick-news at net4u.hr (Nikola Skoric)
Date: Fri, 24 Nov 2006 19:50:12 +0100
Subject: cron job times out
Message-ID: <MPG.1fd15d27ae7577319896d8@news.t-com.hr>

Hello,

I have a few lines of code retrieving a web page and saving some 
variables from it to a log. And everything works nice from command line. 
but, when I make a cron job, I get an error:

Your "cron" job on fly
cd $HOME/bin/ ; python newartlog.py ; cd

produced the following output:

Traceback (most recent call last):
  File "newartlog.py", line 11, in ?
    response = urllib2.urlopen(req)
  File "/usr/local/lib/python2.4/urllib2.py", line 130, in urlopen
    return _opener.open(url, data)
  File "/usr/local/lib/python2.4/urllib2.py", line 358, in open
    response = self._open(req, data)
  File "/usr/local/lib/python2.4/urllib2.py", line 376, in _open
    '_open', req)
  File "/usr/local/lib/python2.4/urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "/usr/local/lib/python2.4/urllib2.py", line 1021, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/local/lib/python2.4/urllib2.py", line 996, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error (145, 'Connection timed out')>

It seems that the connection timed out. But, every time I execute the 
script from the command line, everything goes fine. And every time he 
cron job triggers, it times out. How come?

-- 
"Now the storm has passed over me
I'm left to drift on a dead calm sea
And watch her forever through the cracks in the beams
Nailed across the doorways of the bedrooms of my dreams" 


From rrr at ronadam.com  Mon Nov 13 15:38:08 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 13 Nov 2006 14:38:08 -0600
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <4558B9E3.2040207@hobbshouse.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<45535475.9090207@hobbshouse.org>	<87ac30kwdn.fsf@benfinney.id.au>	<4554AAB4.10002@hobbshouse.org>	<mailman.2054.1163185546.11739.python-list@python.org>	<ej5asp$e85$1@news.albasani.net>	<mailman.2105.1163279202.11739.python-list@python.org>	<ej5e69$j1q$1@news.albasani.net>	<ej5g0e$1jp$1@sea.gmane.org>	<17750.22816.636590.485360@montanaro.dyndns.org>	<ej6erq$vkh$1@sea.gmane.org>
	<4558B9E3.2040207@hobbshouse.org>
Message-ID: <ejalaj$6kf$1@sea.gmane.org>

Michael Hobbs wrote:
> Ron Adam wrote:
>> skip at pobox.com wrote:
>>   
>>>     >>>>> I'm not sure why '\'s are required to do multi-line before the colon.
>>>     >>>> Special cases aren't special enough to break the rules.
>>>     >>>> 
>>>     >>>> Georg
>>>     >>> A bit of a circular answer.
>>>     >>> 
>>>     >>> Why the rule? -> So not to break the rule?
>>>     >> 
>>>     >> You proposed to allow leaving off line continuation '\' only in the
>>>     >> "if", "for" and "while" headers. This is a special case in my eyes.
>>>
>>>     Ron> I wasn't that specific and it was related to Michael's suggestion
>>>     Ron> the colon wasn't needed. If the need for '\' was dropped in
>>>     Ron> multi-line block headers, then the colon would be required for an
>>>     Ron> obvious reason.
>>>
>>> But \ is used to continue all sorts of statements/expressions, e.g.:
>>>
>>>     x = a + \
>>>           b
>>>
>>> not just conditionals.
>>>
>>> Skip
>>>     
>> Of course, and your point is?
>>
>> How about if it be ok to continue to use '\' in headers, but it also be ok to 
>> not to?  That would be the backward compatible way to change it.
>>
>> This doesn't answer the question I was asking, are there any situation where it 
>> would cause problems?  And if so, that reason would be a good and explicit 
>> reason for not making such a change
> 
> To be clear, this is the actual thrust of my argument. It seems 
> redundant to have *both* line continuations and colons in compound 
> statements. I've been arguing for the removal of colons, though to be 
> honest, I'd be content with the opposite approach as well.
> 
> - Mike

Well, maybe you should consider working on that instead.  I think you will get 
much less resistance.


Consider the following points:

* There are not (that I know of) any true multiple line block headers in python 
but only long block headers with continued lines.

* It's probably more beneficial to simplify the more complex cases of multiple 
continued lines, than it is to simplify the already simple cases of non 
continued block headers.

* The block header can be identified in all cases by the initiating keyword and 
the terminating colon. (colons in lambda and dicts need to be identified first)

* The block header can not always be clearly identified strictly based on 
indenting as indenting in a block header spanning several lines is completely 
optional and may vary quite a bit depending on the programmers preferences.

* Line continuations are *already* currently optional in other situations.

 >>> a = (1,
... 1,
... 3,
... 4,
... 5)
 >>> a
(1, 1, 3, 4, 5)

 >>> b = (6, \
... 7, \
... 8, \
... 9)
 >>> b
(6, 7, 8, 9)


* Making line continuations optional requires no changes to the existing library.

* Removing colons would require changing block headers for all existing programs 
and pythons library unless you made the ending colon optional.  But that 
probably would create more confusion and hurt readability more than it improves it.


So giving these points, and any others you can think of, which do you suppose 
has a better chance of being implemented?

It also needs to be pointed out that the line continuations are a strong visual 
indication that a line is continued and not just a aid to the compiler.  So 
there will be resistance to changing that also.  (Over and above the general 
resistance to change most people have.)

Cheers,
    Ron




From skip at pobox.com  Sun Nov 12 17:47:59 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 12 Nov 2006 16:47:59 -0600
Subject: Random image text generation?
In-Reply-To: <pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
	<mailman.23.1163365020.32031.python-list@python.org>
	<pan.2006.11.12.22.33.05.621033@REMOVE.THIS.cybersource.com.au>
Message-ID: <17751.42143.36842.842728@montanaro.dyndns.org>


    Steven> Keep in mind two serious problems with captchas:

    Steven> - they're impossible for the blind or people using text-only
    Steven>   browsers to see -- even mere colour blindness can make some
    Steven>   captchas impossible to solve;

    Steven> - sometimes they're too difficult for even those with perfect
    Steven>   vision to decipher.

Sure, but I'm more concerned in the immediate term with people not
submitting random crap advertising cheap drugs into my concert database.
(I've been running the Musi-Cal concert database for nearly 12 years.  This
is the first time I've ever had to consider resorting to something like
this, and it really pisses me off that I have to.)  I can deal with visual
impairment in other ways (like asking users who can't respond to the captcha
by simply emailing their concert data directly to me).

    Steven> Instead of displaying an obfuscated image of a nonsense word,
    ...

Thanks for the suggestions.  I'll keep them in mind.

Another possibility is to run the submissions through SpamBayes and silently
direct any which score as "unsure" or "spam" to me for review.  Users
wouldn't even need to know their submissions were being scrutinized.

Skip


From saleem.a.ansari at gmail.com  Sun Nov 26 11:46:50 2006
From: saleem.a.ansari at gmail.com (parser)
Date: 26 Nov 2006 08:46:50 -0800
Subject: ANN: RuPy Ruby & Python Conference 2007
In-Reply-To: <1164558164.421675.302290@14g2000cws.googlegroups.com>
References: <1164558164.421675.302290@14g2000cws.googlegroups.com>
Message-ID: <1164559610.340858.170920@l12g2000cwl.googlegroups.com>

This is a really great news for both Ruby and Python lovers!!


Katarzyna Bylec wrote:
> Hello,
>
> we would like to invite you to one of the biggest Ruby and Python
> events in
> central-eastern Europe next year. RuPy Conference dedicated to Ruby and
> Python programming languages will take place in April 14-15, 2007 in
> Poznan,
> Poland and the idea behind it is to put together experts with young
> programmers and to support a good communication channel for East-West
> exchange of prospective ideas.
>
> If you think you have something interesting to present or some ideas to
>
> share with other enthusiasts, we would be more then happy to welcome
> you as
> a Speaker. Proposals of lectures (i.e. title and short abstract) can be
> submitted to rupy-talks at wmid.amu.edu.pl . <rupy-talks at wmid.amu.edu.pl>
>
> Speakers' registration includes attendance at lecture sessions on both
> days
> of the Conference, all refreshments during the coffee breaks and
> Conference
> lunches. For each participant Organizers guarantee free accommodation
> and
> full board during the Conference. As a Speaker you will also be
> entitled to
> partial reimbursement for the travel expenses.You are also more than
> welcome
> to participate in all extra events including guided sightseeing,
> conference
> Banquet and other entertainments provided by Organizers.
>
> All information can be found on RuPy website:
> http://rupy.wmid.amu.edu.pl
> 
> Looking forward to seeing you in Poland,
> RuPy Committee



From tdgrmsn at gmail.com  Wed Nov 22 21:30:20 2006
From: tdgrmsn at gmail.com (ToddG)
Date: 22 Nov 2006 18:30:20 -0800
Subject: Python, WSGI, legacy web application
In-Reply-To: <1164241791.372210.103330@b28g2000cwb.googlegroups.com>
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
Message-ID: <1164249020.575863.28770@l12g2000cwl.googlegroups.com>

> Ben Finney wrote:
> >
> > Is it possible to write a Python WSGI program that talks to a PHP
> > program as its "back end"? Where can I find out how to do this,
> > preferably with examples?

Perhaps:

http://pythonpaste.org/wphp/
http://blog.ianbicking.org/2006-wphp.html



From gilbert3b2g at msn.com  Wed Nov 15 23:20:25 2006
From: gilbert3b2g at msn.com (gilbert3b2g at msn.com)
Date: 15 Nov 2006 20:20:25 -0800
Subject: Press button to load data
Message-ID: <1163650825.563379.38550@b28g2000cwb.googlegroups.com>

I'm new to Python, and programming in general.
What I'm trying to do here is to load a list of accounts from a file on
my harddrive into a string of Buttons in Tkinter, and when I press one
of the Buttons, which has one of my account name, it will load that
account into a new window. But I don't understand how to code the
proccess that would tell the program what account is selected. Any help
with this would be very appreciated. Thanks in advance.

from Tkinter import *
import shelve
from tkMessageBox import showerror

shelvename = shelve.open('class-shelve2')
cat = (' Name ', ' Account # ', ' Amount Due ', ' Date Due ')

def NameFields(top):
    name1 = Label(None, text=cat[0], relief=RIDGE, width=20, fg='blue',
bg='white', font=('bold',15))
    name2 = Label(None, text=cat[1], relief=RIDGE, width=15, fg='blue',
bg='white', font=('bold',15))
    name3 = Label(None, text=cat[2], relief=RIDGE, width=15, fg='blue',
bg='white', font=('bold',15))
    name4 = Label(None, text=cat[3], relief=RIDGE, width=15, fg='blue',
bg='white', font=('bold',15))
    name1.grid(row=0, column=0, sticky=NSEW)
    name2.grid(row=0, column=1, sticky=NSEW)
    name3.grid(row=0, column=2, sticky=NSEW)
    name4.grid(row=0, column=3, sticky=NSEW)
    top.columnconfigure(0, weight=1)
    top.columnconfigure(1, weight=1)
    top.columnconfigure(2, weight=1)
    top.columnconfigure(3, weight=1)


def DisplayBills(top):
    c=0
    for bill in shelvename:
        bill1 = Button(None, text= shelvename[bill].name,
font=('bold',10), command=fetchRecord)
        bill2 = Label(None, text= shelvename[bill].account,
relief=RIDGE, font=('bold',10))
        bill3 = Label(None, text= shelvename[bill].paymentDue,
relief=RIDGE, font=('bold',10), fg='red')
        bill4 = Label(None, text= shelvename[bill].dateDue,
relief=RIDGE, font=('bold',10))
        bill1.grid(row=c, column=0, sticky=NSEW)
        bill2.grid(row=c,column=1, sticky=NSEW)
        bill3.grid(row=c,column=2, sticky=NSEW)
        bill4.grid(row=c,column=3, sticky=NSEW)
        c = c + 1

def fetchRecord():
       
top = Tk()

DisplayBills(top), NameFields(top)

mainloop()



From Roberto.Bonvallet at cern.ch  Wed Nov 29 10:35:37 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Wed, 29 Nov 2006 15:35:37 +0000 (UTC)
Subject: trouble writing results to files
References: <1164812827.653386.323320@80g2000cwy.googlegroups.com>
	<ekk8kh$4lo$2@cernne03.cern.ch>
	<slrnemra5e.po.horpner@FIAD06.norwich.edu>
Message-ID: <ekk9c9$59i$1@cernne03.cern.ch>

Neil Cerutti wrote:
> On 2006-11-29, Roberto Bonvallet <Roberto.Bonvallet at cern.ch> wrote:
>> BTW, iterating over range(len(a)) is an anti-pattern in Python.
> 
> Unless you're modifying elements of a, surely?

enumerate is your friend :)

    for n, item in enumerate(a):
	if f(item):
	    a[n] = whatever

-- 
Roberto Bonvallet


From B.Ogryczak at gmail.com  Wed Nov 29 13:26:30 2006
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 29 Nov 2006 10:26:30 -0800
Subject: pickle and infinity
In-Reply-To: <mailman.844.1164823762.32031.python-list@python.org>
References: <1164820161.480995.180500@l12g2000cwl.googlegroups.com>
	<mailman.844.1164823762.32031.python-list@python.org>
Message-ID: <1164824790.211227.305300@14g2000cws.googlegroups.com>


Fredrik Lundh wrote:
> Bart Ogryczak wrote:
>
> > I?ve got this problem with pickle, it seems it doesn?t handle
> > correctly infinite values (nor does Python return overflow/underflow
> > error).
>
> Python 2.X relies on the C library to serialize floats, and, as you've
> noticed, some C libraries can produce values that they themselves cannot
> read.

Actually I?d be very happy, if Python would throw FloatPointExeption,
rather then allow infinite values. Haven?t got idea how to do it.
fpectl would do the trick, but it?s not present nither on Solaris, nor
on Windows platform. And I?d need it on both.



From apardon at forel.vub.ac.be  Fri Nov 17 10:21:33 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 17 Nov 2006 15:21:33 GMT
Subject: How fuzzy is get_close_matches() in difflib?
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
	<1163746781.666937.63970@h48g2000cwc.googlegroups.com>
Message-ID: <slrnelrkrt.7ok.apardon@rcpc42.vub.ac.be>

On 2006-11-17, John Henry <john106henry at hotmail.com> wrote:
> I encountered a case where I am trying to match "HIDESST1" and
> "HIDESCT1" against ["HIDEDST1", "HIDEDCT1", "HIDEDCT2", "HIDEDCT3"]
>
> Well, they both hit "HIDEDST1" as the first match which is not exactly
> the result I was looking for.  I don't understand why "HIDESCT1" would
> not hit "HIDEDCT1" as a first choice.

    H I D E D S T 1     H I D E D C T 1

 H  .                   .
 I    .                   .
 D      .                   .
 E        .                   .
 S            .             
 C                                .
 T              .                   .
 1                .                   .

As far as I can see the distance of HIDEDCT1 to HIDESCT1 is
the same as the distance of HIDEDCT1 to HIDEDST1. In both
cases you have to remove one character from the target as well
as one character from the candidate in order to get the
same substring.

-- 
Antoon Pardon


From ptmcg at austin.rr._bogus_.com  Sun Nov 26 06:54:49 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 26 Nov 2006 11:54:49 GMT
Subject: a -very- case sensitive search
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<HDeah.2979$_H5.535@tornado.texas.rr.com>
	<1164541566.246893.279680@l12g2000cwl.googlegroups.com>
Message-ID: <dgfah.2980$_H5.2805@tornado.texas.rr.com>


"John Machin" <sjmachin at lexicon.net> wrote in message 
news:1164541566.246893.279680 at l12g2000cwl.googlegroups.com...
>
John -

Thanks for the updates.  Comments below...

-- Paul

> Paul McGuire wrote:
>
>> You may have to do some setup
>> of your locale for proper handling of unicode.isupper, etc.,
>
> Whatever gave you that impression?
>

Nothing. Just my own ignorance of unicode and i18n.  This post really is 
just string mechanics and re's - I wasn't sure I had all the underlying 
unicode stuff right.

>> uppers = u"".join( unichr(i) for i in range(sys.maxunicode)
>>                     if unichr(i).isupper() )
>> lowers = u"".join( unichr(i) for i in range(sys.maxunicode)
>>                     if unichr(i).islower() )
>
> Just in case the OP is running a 32-bit unicode implementation, you
> might want to make that xrange, not range :-)
>

Good tip.  I rarely use xrange, it seems like such a language wart.  Isn't 
"range" going to become what "xrange" is in Py3k?





From johnjsal at gmail.com  Thu Nov  2 15:29:17 2006
From: johnjsal at gmail.com (JohnJSal)
Date: 2 Nov 2006 12:29:17 -0800
Subject: what's the difference between these two methods? (aka,
	why doesn't one of them work?)
In-Reply-To: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
References: <1162499293.080529.5480@m73g2000cwd.googlegroups.com>
Message-ID: <1162499357.481355.293910@b28g2000cwb.googlegroups.com>


JohnJSal wrote:
> Can someone explain to me why the first version of this method works,
> but the second one doesn't?

Sorry, it's the first one that doesn't work. The second one does.



From bj_666 at gmx.net  Thu Nov 30 08:47:48 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 30 Nov 2006 14:47:48 +0100
Subject: PythonTidy
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
	<ekmmu4$8ii$1@upsn250.cri.u-psud.fr>
Message-ID: <pan.2006.11.30.13.47.47.378102@gmx.net>

In <ekmmu4$8ii$1 at upsn250.cri.u-psud.fr>, Laurent Pointal wrote:

> Roberto Bonvallet a ?crit :
>> # vim: set fileencoding=utf-8 :
> ...
>> # -*- coding: utf-8 -*-
> ...
>> About changing the shebang line:  I'll take it as a bug.
>> About changing the encoding declaration from vim-style to emacs-style:
>> I'll take it as an insult :)
> 
> This is not "emacs-style", this is Python normalized source encoding
> directive for correct interpretation of u"..." strings by Python
> interpreter.
> 
> See http://www.python.org/dev/peps/pep-0263/

Where does it say it has to be emacs-style?  It just uses that style as
example as far as I can see.  The real definition is a regexp:

  coding[:=]\s*([-\w.]+)

So the vim-style is fine.  No need to replace it.

Ciao,
	Marc 'BlackJack' Rintsch


From ndbecker2 at gmail.com  Sun Nov 12 07:01:24 2006
From: ndbecker2 at gmail.com (Neal Becker)
Date: Sun, 12 Nov 2006 07:01:24 -0500
Subject: Find interface associated with default route?
References: <ej6vr6$17a$1@sea.gmane.org> <ej705n$2n9$1@sea.gmane.org>
Message-ID: <ej72eg$7hr$1@sea.gmane.org>

Fredrik Lundh wrote:

> Neal Becker wrote:
> 
>> Any thoughts on howto find the interface associated with the default
>> route (this is on linux)?
> 
> are you sure you sent this to the right newsgroup ?
> 
> is this what you want ?
> 
>  >>> import os
>  >>> for line in os.popen("/sbin/route"):
> ...     line = line.split()
> ...     if line[0] == "default":
> ...             print line[-1]
> ...
> eth0
> 

Well, I was hoping for something more 'elegant' - meaning relying on library
calls rather than calling programs.  Obviously, /sbin/route has some
library calls to obtain this info, and maybe python has a wrapper for it.

Yes, this is the right group - I want a python solution.



From martin at v.loewis.de  Wed Nov  8 00:10:14 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Nov 2006 06:10:14 +0100
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL
 ?
In-Reply-To: <1162939715.915139.146890@b28g2000cwb.googlegroups.com>
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
	<1162928970.223276.72600@h48g2000cwc.googlegroups.com>
	<4550F2AE.1010205@v.loewis.de>
	<1162939715.915139.146890@b28g2000cwb.googlegroups.com>
Message-ID: <455166B6.6040009@v.loewis.de>

Ross Ridge schrieb:
> So give an example where reference counting is unsafe.

Nobody claimed that, in that thread. Instead, the claim was
"Atomic increment and decrement instructions are not by themselves
sufficient to make reference counting safe."

I did give an example, in <4550cc64$0$3462$9b622d9e at news.freenet.de>.
Even though f_name is reference-counted, it might happen that you get a
dangling pointer. More specifically, even if file_repr *incremented* the
reference counter for f_name, it might still be a dangling pointer.

To quote Joe again:

# Basically there's a race condition where an object containing the
# refcount can be deleted between the time you load a pointer to
# the object and the time you increment what used to be a refcount
# and is possibly something else but definitely undefined.

I don't understand why you can't see that this statement is factually
correct.

Regards,
Martin


From jonas.esp at googlemail.com  Thu Nov 23 18:41:13 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 23 Nov 2006 15:41:13 -0800
Subject: sys.stderr.write and sys.exit
In-Reply-To: <mailman.657.1164321569.32031.python-list@python.org>
References: <1164278785.075748.220690@j44g2000cwa.googlegroups.com>
	<mailman.657.1164321569.32031.python-list@python.org>
Message-ID: <1164325273.510305.121230@m7g2000cwm.googlegroups.com>

Thanks Ben Finney. So it's understood very well.

Ben Finney ha escrito:

> "GinTon" <jonas.esp at googlemail.com> writes:
>
> > Is the same use
>>    >>> sys.stderr.write('error message'); sys.exit(1)
> > than
>>    >>> sys.exit('error message') ?
>
> Code that wants to catch SystemExit will get a different exception
> object in each case::
>
>     >>> import sys
>     >>> from StringIO import StringIO
>     >>> sys.stderr = StringIO()
>
>     >>> try:
>     ...     sys.stderr.write('error message')
>     ...     sys.exit(1)
>     ... except SystemExit, e:
>     ...     print "stderr contains:", sys.stderr.getvalue()
>     ...     print "e.code is:", e.code
>     ...
>     stderr contains: error message
>     e.code is: 1
>
>     >>> try:
>     ...     sys.exit('error message')
>     ... except SystemExit, e:
>     ...     print "stderr contains:", sys.stderr.getvalue()
>     ...     print "e.code is:", e.code
>     ...
>     stderr contains: error message
>     e.code is: error message
>
> I quite often catch SystemExit in unit tests, or other code that is
> inspecting a program module.



From fredrik at pythonware.com  Fri Nov 17 07:25:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 13:25:33 +0100
Subject: What python modules are available?
In-Reply-To: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
References: <1163765733.745577.116670@m73g2000cwd.googlegroups.com>
Message-ID: <ejk9ns$m45$1@sea.gmane.org>

Why Tea wrote:

> How do I find out what python modules are installed on a Solaris
> platform?

ask the person who did the installation?  or run this script:

http://svn.effbot.python-hosting.com/pydotorg/listmodules/listmodules.py

> I tried to import numarray, but python couldn't find it.

numarray isn't a standard module; see the library reference for a list 
of modules that you can expect to be available on most platforms (but 
make sure you check the page for the modules you're interested in, to 
see if they're platform-specific or otherwise optional)

</F>



From tony.ha at philips.com  Wed Nov 15 10:56:41 2006
From: tony.ha at philips.com (tony.ha at philips.com)
Date: Wed, 15 Nov 2006 15:56:41 GMT
Subject: How to pass an argument to a python program open in IDLE?
Message-ID: <ZMG6h.110$nx.65@lon04-news-philips>

Hello,

I have open a Python program in the IDLE, but when I select the "run 
module" under "run" menu, it
does not allow me to pass an argument to my Python program! 
How do you pass an argument to a Python program under the IDLE? Thanks for 
you help!


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From userprogoogle-139 at yahoo.co.uk  Mon Nov 13 11:15:28 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 13 Nov 2006 08:15:28 -0800
Subject: CORBA: Fnorb Problems
References: <1163430997.532317.206850@b28g2000cwb.googlegroups.com>
	<4rrj89FspqicU1@mid.uni-berlin.de>
Message-ID: <1163434528.147036.63610@f16g2000cwb.googlegroups.com>

>
> I used omniorb, and have been very satisfied with it. You might consider
> switching.
>
> Diez

Thanks, I have just downloaded that plus omniORBpy as well. I have the
binary version of omniORB but need to build omniORBpy, from what I can
see the build process is aimed at GCC and not VC++. Anyway I will try
to figure it out.

Best,

rod



From steve at REMOVE.THIS.cybersource.com.au  Thu Nov  9 08:33:10 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 10 Nov 2006 00:33:10 +1100
Subject: substring search without using built in utils
References: <BAY129-F498DEF70959525FACCC2DB5F00@phx.gbl>
	<mailman.1954.1163038984.11739.python-list@python.org>
	<45530805$0$10013$426a74cc@news.free.fr>
	<1163071862.056378.13870@f16g2000cwb.googlegroups.com>
Message-ID: <pan.2006.11.09.13.33.09.874729@REMOVE.THIS.cybersource.com.au>

On Thu, 09 Nov 2006 03:31:02 -0800, John Machin wrote:

> 
> Bruno Desthuilliers wrote:
>> Gabriel Genellina wrote:
>> > At Wednesday 8/11/2006 22:29, zeal elite wrote:
>> >
>> >> I am looking for substring search python program without using the
>> >> built in funtions like find, or 'in'.
>> >
>> > The only reasonable usage for such a constraint would be a school
>> > assignment so: don't cheat and do your homework!
>> >
>>
>> OTHO, looking for existing solutions to a same or similar problem and
>> studying them is usually considerer good practice in real-life
>> programming jobs !-)
>>
> 
> Looking at an existing solution for substring search that was coded in
> Python, instead of using the built-in functionality would IMHO be
> considered extremely bad practice in a real-life programming job.

Sure. But what if the data type in question wasn't a string, but a list?


Given a source list, find the offset of a target sub-list within the
source list, in other words, find for lists.

i.e. search(source, target) returns n if source[n:n+len(target)] == target
for any sequence type.

Yes, I know I'm changing the constraints of the problem. Now for a real
challenge, change the search from a one-dimensional data structure to two.

(The solution is left as an exercise for the class.)

-- 
Steve.



From bn.sharath at gmail.com  Fri Nov 17 02:22:23 2006
From: bn.sharath at gmail.com (sharath B N)
Date: Fri, 17 Nov 2006 12:52:23 +0530
Subject: problem with defining a global class instance
Message-ID: <f01c4d9e0611162322o7d65b544q626b4a70c9186b23@mail.gmail.com>

hi,
i am sort of newbie to python. I am trying to do a super Market
simulation with OOP in python. I have problems with using a class
instance as global...
def generate (... ,....,...)

" in this function i define the global variables "
global  stock,stockManager, manager etc.


class Manager
...
...
...
def  create_stockManager(..)
""" this is a method in class manager"""
stockManager = StockManager( name)
stockManager.create_Stock(..)


now this gives an attribute error sayin .... stockManager has no
attribute create_Stock

if i create the StockManager instance in the generate func
itself...then this problem doesnt come....but i need it this way for
the program to make sense..
can somebody help me
thnks
Sharath


From kay.schluehr at gmx.net  Tue Nov 21 09:22:35 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 21 Nov 2006 06:22:35 -0800
Subject: Reference class in class creation
References: <a1b59$4562eff8$547078de$21737@news.chello.at>
	<4sga7nFsi0j0U1@mid.uni-berlin.de>
	<a1c52$4562f68e$547078de$28920@news.chello.at>
	<Xns988284E97F275duncanbooth@127.0.0.1>
	<7ebdb$456303ba$547078de$26211@news.chello.at>
Message-ID: <1164118954.982140.225980@m7g2000cwm.googlegroups.com>

Is there a reason why don't you drop the metaclass and perform the
validation step after the class has been created using a generic
function?

class Tour(MotourController):
    pass

Tour.sqlobjectclass = model.Tour
Tour.widget_edit = TourEdit(controller=Tour, name = "tourheader", ...)

Tour = validate(Tour)



From sjmachin at lexicon.net  Thu Nov  9 18:44:00 2006
From: sjmachin at lexicon.net (John Machin)
Date: 9 Nov 2006 15:44:00 -0800
Subject: pack a three byte int
In-Reply-To: <1163114202.636000.234900@m73g2000cwd.googlegroups.com>
References: <1163027401.386603.263030@k70g2000cwa.googlegroups.com>
	<dave.opstad-DDDD4D.07231609112006@reader0903.news.uu.net>
	<dave.opstad-89CBE8.07261509112006@reader0903.news.uu.net>
	<1163092047.577688.140400@m73g2000cwd.googlegroups.com>
	<1163114202.636000.234900@m73g2000cwd.googlegroups.com>
Message-ID: <1163115840.190634.5800@m73g2000cwd.googlegroups.com>

p.lavarre at ieee.org wrote:
> > Not as concisely as a one-byte struct code
>
> Help, what do you mean?

Help, what did you mean by the question?

"struct" == "Python struct module"

Struct module has (concise) codes B, H, I, Q for unsigned integers of
lengths 1, 2, 4, 8, but does *not* have a code for 3-byte integers.

>
> > you presumably... read... the manual ...
>
> Did I reread the wrong parts?  I see I could define a ctypes.Structure
> since 2.5, but that would be neither concise, nor since 2.3.

Looks like you ignored the first word in the sentence ("Not").

>
> > when 24-bit machines become ... popular
>
> Indeed the struct's defined recently, ~1980, were contorted to make
> them easy to say in C, which makes them easy to say in Python, e.g.:
>
> X28Read10 = 0x28
> cdb = struct.pack('>BBIBHB', X28Read10, 0, skip, 0, count, 0)
>
> But when talking the 1960's lingo I find I am actually resorting to
> horrors like:
>
> X12Inquiry = 0x12
> xxs = [0] * 6
> xxs[0] = X12Inquiry
> xxs[4] = allocationLength
> rq = ''.join([chr(xx) for xx in xxs])
>
> Surely this is wrong?  A failure on my part to think in Python?

It looks wrong (and a few other adjectives), irrespective of what
problem it is trying to solve. Looks like little-endian 4-byte integer
followed by 2-byte integer ... what's wrong with struct.pack("<IH",
X12Inquiry, allocationLength) ????

Your original question asked about bigendian 3-byte integers; have you
read the suggested solution that I posted? Does it do what you asked
(one pack call instead of three)????



From maxime_phan at hotmail.com  Mon Nov 20 23:14:23 2006
From: maxime_phan at hotmail.com (maxime_phan at hotmail.com)
Date: 20 Nov 2006 20:14:23 -0800
Subject: sending image pil 1.1.5 by network
In-Reply-To: <mailman.509.1164041418.32031.python-list@python.org>
References: <1164039347.784574.294770@h54g2000cwb.googlegroups.com>
	<mailman.509.1164041418.32031.python-list@python.org>
Message-ID: <1164082463.650146.315230@k70g2000cwa.googlegroups.com>

it works with base64 thanks alot!!!, I know it's not very good
solution, but it's for a multiplayer checkers game with webcam, and I
already use enet everywhere
Fredrik Lundh a ?crit :

> maxime_phan at hotmail.com wrote:
>
> > Hello everyone, I'm trying to make a webcam software with python, pil
> > library and enet (networking)
> > Now I have in the client my pil image get from webcam, ready to be send
> > by network.
> >
> > I do that:
> >
> > self.peer.send(0, image.tostring(), enet.FLAG_RELIABLE)
> >
> > and I have this error:
> > TypeError: argument 2 must be string without null bytes, not str
> >
> > does someone know what kind of convertion I should do to make it work?
>
> "self.peer", whatever that is, doesn't seem to support transfer
> of binary data.  better talk to the vendor.
>
> (you could in theory use base64 encoding or some other text-only
> representation of binary data, but that doesn't seem like a very
> practical solution for a webcam application.)
> 
> </F>



From gagsl-py at yahoo.com.ar  Wed Nov 29 05:45:42 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 29 Nov 2006 07:45:42 -0300
Subject: Asyncore Medusa Example
In-Reply-To: <456D5FBA.2010909@contrado.com.au>
References: <456D5FBA.2010909@contrado.com.au>
Message-ID: <7.0.1.0.0.20061129074123.053c09c0@yahoo.com.ar>

At Wednesday 29/11/2006 07:23, Graeme Matthew wrote:

>does anyone know where you can find examples of how to write a native
>python webserver, I have looked at medusa and asyncore but there are no
>real examples and the doco is very light

The Python standard library already comes with a native HTTP server. 
And you have menctioned Medusa, and there is also Twisted and... try 
google to find more examples.
Do you want to write *another* one?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From sjmachin at lexicon.net  Tue Nov 21 14:23:12 2006
From: sjmachin at lexicon.net (John Machin)
Date: 21 Nov 2006 11:23:12 -0800
Subject: Parsing/Splitting Line
In-Reply-To: <slrnem5u8l.1b4.horpner@FIAD06.norwich.edu>
References: <1164088789.316244.124340@b28g2000cwb.googlegroups.com>
	<slrnem5u8l.1b4.horpner@FIAD06.norwich.edu>
Message-ID: <1164136992.636009.251950@k70g2000cwa.googlegroups.com>


Neil Cerutti wrote:
> On 2006-11-21, acatejr at gmail.com <acatejr at gmail.com> wrote:
> > I have a text file and each line is a list of values.  The
> > values are not delimited, but every four characters is a value.
> > How do I get python to split this kind of data?  Thanks.
>
> Check out _Text Processing in Python_, Chapter 2, "PROBLEM:
> Column statistics for delimited or flat-record files".
> URL:http://gnosis.cx/TPiP/

Hmmmm ... the elementary notion "do line[start:end] in a loop" is well
buried, just behind this:

                  # Adjust offsets to Python zero-based indexing,
                  # and also add final position after the line
                  num_positions = len(self.column_positions)
                  offsets = [(pos-1) for pos in self.column_positions]
                  offsets.append(len(line))

Folk who are burdened with real-world flat files (example: several
hundred thousand lines each of 996 bytes wide) might want to consider
moving the set-up of "offsets" out of the once-per line splitter()
method to the __init__() method :-)

Cheers,
John



From noone at nowhere.com  Sun Nov  5 14:26:38 2006
From: noone at nowhere.com (avidfan)
Date: Sun, 05 Nov 2006 13:26:38 -0600
Subject: question about loading variables from a file...
Message-ID: <mcesk2tbcsm5aa4skvm2itsmvregemogo7@4ax.com>

Can someone offer some advice as to how the best way to approach this
might be?

I am trying to write a generic python script to build out some
applications, so the python script will be generic enough to work for
all of them, but it needs to 'source' a file that contains app and
environment specific variables.

I have used WLST, which provides the loadProperties() method for
reading values for weblogic domains, but I'm trying to find the best
way to do the same sort of thing in python...

thanks for any advice.



From orsenthil at gmail.com  Mon Nov 13 08:07:38 2006
From: orsenthil at gmail.com (Phoe6)
Date: 13 Nov 2006 05:07:38 -0800
Subject: httplib.InvalidURL: nonnumeric port: For characters in the
	proxypassword in URL
In-Reply-To: <mailman.52.1163419946.32031.python-list@python.org>
References: <1163408210.915911.327430@k70g2000cwa.googlegroups.com>
	<1163419232.632721.192360@i42g2000cwa.googlegroups.com>
	<mailman.52.1163419946.32031.python-list@python.org>
Message-ID: <1163423258.919153.281260@b28g2000cwb.googlegroups.com>

Fredrik Lundh wrote:

Hi Fredrik,
               I apologize if I offended you or have shown any
impatience. I shall try again:

> oh, please.  urllib.quote is a *function*; there's no way that calling that function
> from code written for urllib2 will affect anything.
>
> but you can access urllib.quote from the urllib2 namespace too.  it's actually the
> very same function:
>
> >>> urllib.quote
> <function quote at 0x00F430F0>
> >>> urllib2.quote
> <function quote at 0x00F430F0>
>
> (urllib2 imports lots of stuff from urllib)

I dont know, it does not for me.

>>> urladd = "http://example.net:80 at username:|\/|pr0c"
>>> print urladd
http://example.net:80 at username:|\/|pr0c
>>>import urllib2
>>> url = urllib2.quote(urladd)
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
AttributeError: 'module' object has no attribute 'quote'
>>> import urllib
>>> url = urllib.quote(urladd)
>>> print url
http%3A//example.net%3A80%40username%3A%7C%5C/%7Cpr0c
>>>

> > I dont want to import urllib, with the urllib2 itself wanted to work
> > around this piece of code.
>
> not wanting to solve a problem is a pretty lousy problem-solving strategy, really.

Sorry. :-) I shall take your advice and try to get to bottom of this
issue.
- To the piece of code, I import urllib
- use urllib.quote() to covert the proxy url to a quoted one.
and try again, I get an error:

<error>
Traceback (most recent call last):
  File "C:\Python24\forge\ngwallp\ngwall.py", line 38, in ?
    data = urllib2.urlopen(site)
  File "C:\Python24\lib\urllib2.py", line 130, in urlopen
http://lava.nationalgeographic.com/cgi-bin/pod/wallpaper.cgi?day=13&month=11&year=06
    return _opener.open(url, data)
  File "C:\Python24\lib\urllib2.py", line 358, in open
    response = self._open(req, data)
  File "C:\Python24\lib\urllib2.py", line 376, in _open
    '_open', req)
  File "C:\Python24\lib\urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "C:\Python24\lib\urllib2.py", line 573, in <lambda>
    lambda r, proxy=url, type=type, meth=self.proxy_open: \
  File "C:\Python24\lib\urllib2.py", line 580, in proxy_open
    if '@' in host:
TypeError: iterable argument required
</error>

This is where, I gave up and wrote the previous email as not to mess up
urllib with urllib2.
The piece of code, was working properly till I changed my proxy
password to something containng '|\/|'.
- Before shooting a mail to the grooups, i kindda encoded password to
valid url characters ( %7C%5C/%7C) and tried. But this did not work.
So, I dont think this is urllib.quote() issue. I am looking for a way
as how to use the ProxyHandler with authentication in different way
than I have used below.

proxy_url_add = r'http://' + proxy_user + ':' + proxy_password + '@' +
PROXY_IP
proxy_url = urllib.quote(proxy_url_add)

proxy_support = urllib2.ProxyHandler({"http":proxy_url})
opener = urllib2.build_opener(proxy_support,urllib2.HTTPHandler)
urllib2.install_opener(opener)

Thanks for your response.
Regards,
Senthil



From sjmachin at lexicon.net  Sat Nov 25 21:03:13 2006
From: sjmachin at lexicon.net (John Machin)
Date: 25 Nov 2006 18:03:13 -0800
Subject: a -very- case sensitive search
In-Reply-To: <1164496061.281428.126670@l12g2000cwl.googlegroups.com>
References: <1164490795.866046.133230@45g2000cws.googlegroups.com>
	<1164495824.540112.117410@l12g2000cwl.googlegroups.com>
	<1164496061.281428.126670@l12g2000cwl.googlegroups.com>
Message-ID: <1164506593.625847.162830@14g2000cws.googlegroups.com>


Dustan wrote:

>
> If you're using google groups, it for some reason thought my example
> code was 'quoted text', which it certainly isn't, seeing as it's not
> found anywhere prior to my message.

Sigh. And if we're NOT using Google Groups, it still thinks so ...

The reason is that your "example code" was in fact a screen-dump of a
Python interactive session, in which lines are preceded by ">>>" which
Google Groups simplistically thinks is quoted text from a previous
message.

HTH,
John



From steve at ferg.org  Fri Nov 24 13:30:16 2006
From: steve at ferg.org (Steve)
Date: 24 Nov 2006 10:30:16 -0800
Subject: How do I access a main frunction from an import module?
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <1164393016.664066.237570@l39g2000cwd.googlegroups.com>

This is an interesting question.  It almost looks like a case of
event-driven programming, where main is the plug-in and abc is the
framework.
http://eventdrivenpgm.sourceforge.net/

So how about something like this:

################## abc.py ####################

#------------------------------------------------------------
# an "abstract" function.
# It should be over-ridden in the calling program
#------------------------------------------------------------
def m():
	raise AssertionError("You should have over-ridden abstract function
m()")

def a():
    m()
    return None


########### main.py ####################
import abc  # "instantiate" the framework

# define our our "concrete" function m
def m():
    print 'something'
    return None

#-----------------------------------------------
# override the "abstract" function abc.m()
# with our own "concrete" function m().
# Comment out this line and see what happens.
#-----------------------------------------------
abc.m = m

# invoke the a() function in the abc framework
abc.a()

#################################################



From tom at t0mb.net  Sat Nov 18 08:58:51 2006
From: tom at t0mb.net (tom)
Date: Sat, 18 Nov 2006 13:58:51 +0000
Subject: Having trouble converting popen2 to subprocess
In-Reply-To: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>
References: <en3ul21jr5f41a4v1taq67951c845t518v@4ax.com>
Message-ID: <455F119B.2060805@t0mb.net>

Daniel Klein wrote:
> Here's a c routine that prints a single line :
>
> #include <stdio.h>
> main()
> {
>   printf ("Hello World!\n");
> }
>
> And now the Python program (called 'po.py') that uses 'popen2' :
>
> import popen2
> (fin, fout) = popen2.popen2(r'c:\home\hw.exe', -1, 't')
> print fin.readline()
> fin.close()
> fout.close()
>
> When this is run it properly outputs the one line from the c routine :
>
> C:\>python c:\python\po.py
> Hello World!
>
> Now here is my attempt to use the 'subprocess' module :
>
> from subprocess import *
> p = Popen(r'c:\home\hw.exe', bufsize=-1, stdin=PIPE, stdout=PIPE,
> universal_newlines=True)
> fin = p.stdin
> print fin.readline()
> fin.close()
>
> When this is run, I get no output :
>
> C:\>python c:\python\sp.py
>
>
> C:\>
>
> As you can see, I get no exception.
>
> I've tried various combinations of the Popen arguments with no joy.
>
> The platform is Windows XP Pro, so I did not try things like
> 'close_fds'.
>
> What am I missing ?
>
> Daniel Klein
>   
subprocess will actually execute as a subprocess, so you have to wait 
for the command to finish before you look at the stdout.  Advantages of 
this being that you can interfere with stdin/out whilst the program is 
running.  I believe .wait will be what you want, although i haven't look 
at the docstring, so double check.


From nnorwitz at gmail.com  Sat Nov 18 17:46:26 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 18 Nov 2006 14:46:26 -0800
Subject: How can I speed this function up?
In-Reply-To: <ejmvrl$bfb$02$1@news.t-online.com>
References: <kou7h.67901$rP1.39303@news-server.bigpond.net.au>
	<ejmvrl$bfb$02$1@news.t-online.com>
Message-ID: <1163889985.991519.160250@h54g2000cwb.googlegroups.com>

Peter Otten wrote:
>
> # Norvitz/Lundh
> def writelines_data(out, data, map=map, str=str):
>       SPACE_JOIN = ' '.join
>       out.writelines(
>          "ELEMENT %06d %s\n" % (i1, SPACE_JOIN(map(str, i2)))
>                for i0, i1, i2 in data if i0 == 'ELEMENT'
>          )
>
> def print_data(out, data):
>     for name, index, items in data:
>         if name == "ELEMENT":
>             print >> out, "ELEMENT %06d" % index,
>             for item in items:
>                 print >> out, item,
>             print >> out
>
> Output on my machine:
>
> $ python2.5 writedata.py
> write_data 10.3382301331
> writelines_data 5.4960360527
> print_data 3.50765490532

Interesting.  I timed with python2.4 and get this:

write_data 12.3158090115
writelines_data 5.02135300636
print_data 5.01881980896

A second run yielded:

write_data 11.5980260372
writelines_data 4.8575668335
print_data 4.84622001648

I'm surprised by your numbers a bit because I would expect string ops
to be faster in 2.5 than in 2.4 thanks to /F.  I don't remember other
changes that would cause such an improvement for print between 2.4 and
2.5.  (2.3 shows print doing a bit better than the times above.)

It could be that the variability is high due to lots of I/O or even
different builds.  I'm on Linux.

> Moral: don't forget about good old print. It does have an opcode(*) of its
> own, after all.

Using print really should be faster as less objects are created.

> (*) or two

or 5 :-)

$ grep 'case PRINT_' Python/ceval.c
                case PRINT_EXPR:
                case PRINT_ITEM_TO:
                case PRINT_ITEM:
                case PRINT_NEWLINE_TO:
                case PRINT_NEWLINE:

n



From rpdooling at gmail.com  Fri Nov 24 10:09:36 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 24 Nov 2006 07:09:36 -0800
Subject: Active State and Komodo...
In-Reply-To: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
Message-ID: <1164380976.218515.107780@m7g2000cwm.googlegroups.com>

Steve Thompson wrote:
>
> I was wondering the differnced there were betwee Active State's python and
> the open source version of python.

The biggest difference at the moment is that ActiveState is still using
Python 2.4.3 in their distribution. They should be coming out with 2.5
soon.

Sounds like you are running Suse?  So you already have some version of
Python, right? You can search this group at comp.lang.python on Google
Groups--try "python versions linux"--or something like that--but the
issue you need to watch out for is running two different versions on
Linux.

Long and short, you don't want to uninstall the version of Python that
came with your Suse, because other programs on your machine probably
use that particular version. It's easy to install an ADDITIONAL
distribution of Python and run it separately, but again. Search the
list
for how to do that, and how to run them separately once you do.

I'm just moving to Linux myself, so can't provide the expertise. Unless
there is some killer feature of 2.5 you need, I would just use the
Python that came with your Suse.

rd



From inq1ltd at verizon.net  Wed Nov 29 23:55:51 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 29 Nov 2006 23:55:51 -0500
Subject: odict the Ordered Diction 0.2.2
In-Reply-To: <1164811281.405346.227240@l12g2000cwl.googlegroups.com>
References: <1164811281.405346.227240@l12g2000cwl.googlegroups.com>
Message-ID: <200611292355.51786.inq1ltd@verizon.net>

Thanks for the post,
Its become a part time job keeping up with 
updates.

jim-on-linux

http://www.inqvista.com



On Wednesday 29 November 2006 09:41, Fuzzyman 
wrote:
> After a break of almost a year there has been
> an update to `odict the Ordered Dictionary
> <http://www.voidspace.org.uk/python/odict.html>
>`_.
>
> The latest version is 0.2.2, with changes
> implemented by Nicola Larosa.
>
> Despite over 700 downloads since May (plus 1300
> as part of `pythonutils
> <http://www.voidspace.org.uk/python/pythonutils
>.html>`_) there have been no bug reports, only
> improvements [#]_. {sm;:-)}
>
> * `Quick Download
> <http://www.voidspace.org.uk/cgi-bin/voidspace/
>downman.py?file=odict.py>`_
>
> What is odict?
> ==========
>
> **odict** is a pure Python implementation of an
> ordered dictionary. It keeps keys in insertion
> order and allows you to change the order.
> Methods (including iteration) that would return
> members in an arbitrary order are now ordered.
>
> There is also the `SequenceOrderedDict
> <http://www.voidspace.org.uk/python/odict.html#
>sequenceordereddict>`_ that behaves like a
> sequence as well as a dictionary. It allows
> slicing and the keys, values and items methods
> are special sequence objects (which are also
> callable and so behave as methods too).
>
> What's New ?
> ==========
>
> Code
> -------
>
> Removed the TODO and CHANGELOG sections in the
> tail docstring (they are in the docs anyway).
>
> Disabled warnings during tests.
>
> Explicitly disabled tests execution on Python
> v.2.2 . In addition to the slicing tests, other
> ones are failing.
>
> Removed code duplication between the
> ``__init__`` and the ``update`` methods.
>
> Misc. cleanup.
>
> Also, based on code from `Tim Wegener`_:
>
> - added the ``rename`` method;
> - removed a ``has_key`` usage in the
> ``__setitem__`` method.
>
>
> Documentation
> ----------------------
>
> Moved the ISSUES chapter from code's tail
> docstring to here.
>
> Moved up the `Creating an Ordered Dictionary
> <http://www.voidspace.org.uk/python/odict.html#
>creating-an-ordered-dictionary>`_ chapter.
>
> Added prompts to the code examples and removed
> the superfluous print statements (sometimes
> they were there, sometimes they were not).
>
> Misc. cleanup.
>
> .. [#] So either no-one is using it, or it's
> really good...


From timothy at open-networks.net  Thu Nov 16 07:10:43 2006
From: timothy at open-networks.net (timmy)
Date: Thu, 16 Nov 2006 22:10:43 +1000
Subject: Secure Python
In-Reply-To: <ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au>
	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
Message-ID: <455c54c4$1@quokka.wn.com.au>

Stephan Kuhagen wrote:
> timmy <"timothy at open-networks.net"> wrote:
> 
> This sub-thread starts to become a flame-war, isn't it? Calm down, both of
> you... No need to fight, when only some ideas for a technical question are
> requested.

i'm not fighting, sometimes i can be a little terse for that i aplogise.

> 
> 
>>as posted before, linux kernel limit.
>>
>>then you and your users can go as crazy as you want and you won't take
>>out your system.
> 
> 
> The problem with linux kernel limits are, that they won't work really good
> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
> be achieved inside of Python. Since Python does byte compile the code and
> the interpreter evaluates each byte code token in one evaluation step. The
> interpreter could be extended for such usecases to count and limit the
> number of evaluation steps allowed for untrusted script or methods in
> untrusted script as well as to limit the recursion depth or memory to be
> allocated. 

idunno sounds like a lot of trouble to engineer a solution that has 
already got a solution. all win NT systems have resource managment and i 
imagine OS X would as well??

> 
> Regards
> Stephan
> 


From beliavsky at aol.com  Thu Nov 16 13:05:24 2006
From: beliavsky at aol.com (Beliavsky)
Date: 16 Nov 2006 10:05:24 -0800
Subject: accessing fortran modules from python
References: <1163696370.036741.274000@b28g2000cwb.googlegroups.com>
Message-ID: <1163700324.197503.35450@f16g2000cwb.googlegroups.com>


sam wrote:
> hello all,
>
> i am currently in the process of planning a piece of software to model
> polymerisation kinetics, and intend to use python for all the
> high-level stuff. the number-crunching is something i would prefer to
> do in fortran (which i have never used, but will learn), but i have no
> experience of accessing non-python code from python.

I strongly recommend learning Fortran 95, rather than Fortran 77

> i am also fairly new to programming period, and am therefore tackling a fairly serious
> issue reletive to my experience.
>
> how easy is it to get fortran modules running from python?

G95 is a good, free Fortran 95 compiler -- I use it heavily, on
Windows. A discussion of "How to interface with Python programs" using
numpy is at http://www.g95.org/howto.html#python .

There is a numpy group http://groups.google.com/group/Numpy-discussion
with a recent thread "accessing FORTRAN from Python". There is also a
g95 group http://groups.google.com/group/gg95 .

> if c is easier to use in this respect, i could go in that direction instead.

easier to interface with Python, but not easier for writing numerical
code IMO, especially if you need multidimensional arrays.

<snip>

> PS if numpy is adequate for this, i would be quite happy to use it. i
> got the impression it was more for matrix algebra. i will be
> programming a monte carlo simulation, which will need to perform a lot
> (a lot!) of simple operations over and over...

Fortran 95 has some of the advantages of numpy -- you perform
operations on whole arrays and array sections. It would probably be
considerably faster for code with loops.



From antroy at gmail.com  Thu Nov 23 10:36:36 2006
From: antroy at gmail.com (Ant)
Date: 23 Nov 2006 07:36:36 -0800
Subject: Pyparsing Question.
In-Reply-To: <4h_8h.1571$_H5.1426@tornado.texas.rr.com>
References: <1164188646.047093.182390@f16g2000cwb.googlegroups.com>
	<4h_8h.1571$_H5.1426@tornado.texas.rr.com>
Message-ID: <1164296196.242689.207090@j72g2000cwa.googlegroups.com>


> Welcome to pyparsing!  The simplest way to implement a markup processor in
> pyparsing is to define the grammar of the markup, attach a parse action to
> each markup type to convert the original markup to the actual results, and
> then use transformString to run through the input and do the conversion.
> This discussion topic has some examples:
> http://pyparsing.wikispaces.com/message/view/home/31853.

Thanks for the pointers - I had a look through the examples on the
pyparsing website, but none seemed to show a simple example of this
kind of thing. The discussion topic you noted above is exactly the sort
of thing I was after!

Cheers,



From __peter__ at web.de  Tue Nov 14 09:21:37 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 15:21:37 +0100
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejcjcq$kph$01$1@news.t-online.com>

erikcw wrote:

> Hi all,
> 
> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.
> 
> Here is some sample data:
> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> 0.10]
> 
> In this data, some of the significant points include:
> data[0]
> data[2]
> data[4]
> data[6]
> data[8]
> data[9]
> data[13]
> data[14]
> ....
> 
> How do I sort through this data and pull out these points of
> significance?

I think you are looking for "extrema":

def w3(items):
    items = iter(items)
    view = None, items.next(), items.next()
    for item in items:
        view = view[1:] + (item,)
        yield view

for i, (a, b, c) in enumerate(w3(data)):
    if a > b < c:
        print i+1, "min", b
    elif a < b > c:
        print i+1, "max", b
    else:
        print i+1, "---", b

Peter


From scheols at gmail.com  Thu Nov 30 00:02:15 2006
From: scheols at gmail.com (Scheol Service)
Date: Wed, 29 Nov 2006 23:02:15 -0600
Subject: Python Question About Compiling.
In-Reply-To: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
References: <5b0fce7a0611292057p4d429226v9d3416ac9712e2@mail.gmail.com>
Message-ID: <5b0fce7a0611292102g4a345b49h2a6e9c1f51ab4003@mail.gmail.com>

---------- Forwarded message ----------
From: Scheol Service <scheols at gmail.com>
Date: Nov 29, 2006 10:57 PM
Subject: Python Question About Compiling.
To: mailto:python-list at python.org


Im just unsure on how to compile python code into .exe executionable
files.  Is there a simple way to do this?


From horpner at yahoo.com  Fri Nov 17 16:03:43 2006
From: horpner at yahoo.com (Neil Cerutti)
Date: 17 Nov 2006 22:03:43 +0100
Subject: remove a list from a list
References: <ejkv1u$ajf$1@sea.gmane.org> <455E0046.1090005@tim.thechases.com>
	<ejl13i$hqv$1@sea.gmane.org> <455E0A20.9000509@tim.thechases.com>
	<ejl2re$ns3$1@sea.gmane.org> <455E100D.8030100@tim.thechases.com>
	<mailman.374.1163793666.32031.python-list@python.org>
Message-ID: <slrnels90n.16o.horpner@FIAD06.norwich.edu>

On 2006-11-17, Rares Vernica <rvernica at gmail.com> wrote:
> Sorry for not being clear from the beginning and for not using
> clear variable names.
>
> Problem context:
>
> import os
> dirs_exclude = set(('a', 'b', 'e'))
> for root, dirs, files in os.walk('python/Lib/email'):
>      # Task:
>      # delete from "dirs" the directory names from "dirs_exclude"
>      # case-insensitive
>
> The solution so far is:
>
> for i in xrange(len(dirs), 0, -1):
>    if dirs[i-1].lower() in dirs_exclude:
>      del dirs[i-1]
>
> I am looking for a nicer solution.

I'd probably just skip over those dirs as I came them instead of
troubling about mutating the list. Unless the list is needed in
more than one place.

-- 
Neil Cerutti


From sjmachin at lexicon.net  Thu Nov 30 20:33:47 2006
From: sjmachin at lexicon.net (John Machin)
Date: 30 Nov 2006 17:33:47 -0800
Subject: String formatters with variable argument length
References: <mailman.905.1164931966.32031.python-list@python.org>
	<1164932769.210948.289560@f1g2000cwa.googlegroups.com>
	<mailman.906.1164934260.32031.python-list@python.org>
Message-ID: <1164936827.570682.325260@j72g2000cwa.googlegroups.com>

Fredrik Tolf wrote:
> On Thu, 2006-11-30 at 16:26 -0800, John Machin wrote:
> > Fredrik Tolf wrote:
> [...]
> > > The thing is, I want to get format strings from the user, and I don't
> > > want to require the user to consume all the arguments. docs.python.org
> > > doesn't seem to have any clues on how to achieve this, and I can't think
> > > of what to google for.
> >
> > Three approaches spring to mind. In descending order of my preference:
> >
> > (a) don't do that
>
> It would be a possibility, since all current uses actually do have the
> right number of parameters. I would just like to keep the option
> available.
>
> > (b) parse the format string, counting the number of args required. If
> > the user has supplied more, throw them away.
>
> I was thinking of that, but it just seems far too ugly.

what's ugly about this:
[untested]:

def count_format_args(s):
    pending = False
    count = 0
    for c in s:
        if c == "%":
            # doubled % chars aren't counted
            pending = not pending
        elif pending:
            count += 1
            pending = False
    return count

output = format % arglist[:count_format_args(format)]


>
> > (c) wrap your execution of format_string % args in a try/except
> > bracket. If you get a TypeError with that message [not guaranteed to
> > remain constant in the future], throw away the last arg and go around
> > again.
>
> That might be a good possibility. Thanks for the idea! I do consider it
> quite a bit ugly, but that often happens when languages try to police
> programmers... :P
>
> > As a matter of curiosity, why don't you want the user to consume all
> > the arguments? Don't they get even a teensy-weensy warning message? Are
> > you writing a Perl interpreter in Python?
>
> Well basically, I'm rewriting a autodownloader for a file-sharing
> network in Python (previously written as a bash script, using the printf
> command), and I have a number of files scattered over my hard drive
> specifying search expressions, into which a potentially optional episode
> number can be inserted using sprintf-like arguments (using
> fsexpr="`printf "$sexpr" "$curep"`" in bash). I would like to keep it as
> a printf parameter, in order to be able to write e.g. %02i, and I would
> like to keep it optional, for downloading non-episoded stuff.
>
> I couldn't help noticing that the named variant of the % operator (using
> a dict, that is) doesn't require all its arguments to be consumed. Using
> that would require me to rewrite *all* the existing files, though.

So offer the named variant as an option for new users or new uses by
old users.

Cheers,
John



From jackdied at jackdied.com  Mon Nov 27 15:21:42 2006
From: jackdied at jackdied.com (Jack Diederich)
Date: Mon, 27 Nov 2006 15:21:42 -0500
Subject: bz2.readline() slow ?
In-Reply-To: <ek6gfq$hn6$1@fortknox.intranet.wo.rk>
References: <ek6gfq$hn6$1@fortknox.intranet.wo.rk>
Message-ID: <20061127202141.GC5353@performancedrivers.com>

On Fri, Nov 24, 2006 at 10:11:06AM +0000, Soeren Sonnenburg wrote:
> Dear all,
> 
> I am a bit puzzled, as
> 
> -----snip-----
> import bz2
> f=bz2.BZ2File('data/data.bz2');
> 
> while f.readline():
>         pass
> -----snip-----
> 
> takes twice the time (10 seconds) to read/decode a bz2 file
> compared to
> 
> -----snip-----
> import bz2
> f=bz2.BZ2File('data/data.bz2');
> x=f.readlines()
> -----snip-----
> 
> (5 seconds). This is even more strange as the help(bz2) says:
> 
>      |  readlines(...)
>      |      readlines([size]) -> list
>      |      
>      |      Call readline() repeatedly and return a list of lines read.
>      |      The optional size argument, if given, is an approximate bound on the
>      |      total number of bytes in the lines returned.
> 
> This happens on python2.3 - python2.5 and it does not help to specify a
> maximum line size.
> 
> Any ideas ?

The bz2 module is implemented in C so calling "f.readline()" repeatedly
has extra Python => C call overhead that "f.readlines()" doesn't have
because it stays in a tight C loop the whole time.

-Jack


From rridge at csclub.uwaterloo.ca  Tue Nov  7 14:49:30 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 7 Nov 2006 11:49:30 -0800
Subject: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?
References: <eiddl5$qpn$1@news.albasani.net>
	<1162553923.574732.305190@i42g2000cwa.googlegroups.com>
	<eifhf3$mmh$1@news.albasani.net>
	<7xk62ct5pf.fsf@ruckus.brouhaha.com>
	<G-qdnTcpFdoSD83YnZ2dnUVZ_vSdnZ2d@comcast.com>
	<1162913881.953664.254960@m73g2000cwd.googlegroups.com>
	<psCdnVprtNSQIc3YnZ2dnUVZ_tmdnZ2d@comcast.com>
	<1162922230.992249.52430@f16g2000cwb.googlegroups.com>
	<4550cc64$0$3462$9b622d9e@news.freenet.de>
Message-ID: <1162928970.223276.72600@h48g2000cwc.googlegroups.com>


Martin v. L?wis wrote:
> How would you propose to fix file_repr to prevent such
> a race condition?

The race condition you describe is different from the one Joe Seigh
described.  It's caused because without GIL access to the file object
is no longer thread safe, not because reference counting isn't thread
safe.

                          Ross Ridge



From gabor at nekomancer.net  Thu Nov 16 18:09:56 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 00:09:56 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <455CED78.1060604@v.loewis.de>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
	<455CED78.1060604@v.loewis.de>
Message-ID: <bdbfa$455cefc0$59ad1aca$18122@news.flashnewsgroups.com>

Martin v. L?wis wrote:
> gabor schrieb:
> 
>> or am i using os.listdir the "wrong way"? how do other people deal with
>> this?
> 
> You didn't say why the behavior causes a problem for you -  you only
> explained what the behavior is.
> 
> Most people use os.listdir in a way like this:
> 
> for name in os.listdir(path):
>   full = os.path.join(path, name)
>   attrib = os.stat(full)
>   if some-condition:
>     f = open(full)
>   ...
> 
> All this code will typically work just fine with the current behavior,
> so people typically don't see any problem.
> 

i am sorry, but it will not work. actually this is exactly what i did,
and it did not work. it dies in the os.path.join call, where file_name 
is converted into unicode. and python uses 'ascii' as the charset in 
such cases. but, because listdir already failed to decode the file_name 
with the filesystem-encoding, it usually also fails when tried with 'ascii'.

example:

 >>> dir_name = u'something'
 >>> unicode_file_name = u'\u732b.txt' # the japanese cat-symbol
 >>> bytestring_file_name = unicode_file_name.encode('utf-8')
 >>>
 >>>
 >>> import os.path
 >>>
 >>> os.path.join(dir_name,unicode_file_name)
u'something/\u732b.txt'
 >>>
 >>>
 >>> os.path.join(dir_name,bytestring_file_name)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/lib/python2.4/posixpath.py", line 65, in join
     path += '/' + b
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe7 in position 1: 
ordinal not in range(128)
 >>>


gabor


From gagsl-py at yahoo.com.ar  Mon Nov 13 14:08:41 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 13 Nov 2006 16:08:41 -0300
Subject: Find how to embed the BitTorrent in my program
In-Reply-To: <455887AA.9080802@gmail.com>
References: <455887AA.9080802@gmail.com>
Message-ID: <7.0.1.0.0.20061113160812.03eb0b88@yahoo.com.ar>

At Monday 13/11/2006 11:56, ?? ?????? wrote:

>Is there any module can easy embed the BitTorrent(both tracker and
>client) in myself's program .
>Or where can find the documents for reuse official BitTorrent .

Tried downloading the source?


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From CRhode at LacusVeris.com  Thu Nov 30 09:37:54 2006
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Thu, 30 Nov 2006 08:37:54 -0600
Subject: PythonTidy
In-Reply-To: <ekmltj$36d$1@cernne03.cern.ch>
References: <mailman.865.1164854694.32031.python-list@python.org>
	<ekmltj$36d$1@cernne03.cern.ch>
Message-ID: <20061130143754.GD3322@loki>

Roberto Bonvallet wrote this on Thu, Nov 30, 2006 at 01:21:55PM +0000.  My reply is below.

> About changing the shebang line: I'll take it as a bug.

> About changing the encoding declaration from vim-style to
> emacs-style: I'll take it as an insult :)

Ooh! <wounded>

> Both are comments, and should be left that way.  Besides, there is no
> officially preferred way for each of them.  BTW, in a recent thread on
> this newsgroup, most people said they preferred #!/usr/bin/env python over
> #!/usb/bin/python for the shebang line. See http://tinyurl.com/yngmfr .

Thanks for the link.  I was unaware of the /usr/bin/env technique and
the controversy surrounding it.

Thanks, too, for trying *PythonTidy*.

As you have no doubt perceived, *PythonTidy* is *not* "table driven."
It is a script after all.  I decided before writing it that I didn't
really need to externalize all the options; nevertheless, most are
declared near the beginning where they sit just begging for end-user
involvement.  See: CODING_SPEC and SHEBANG.  *PythonTidy* is all about
consistency, consistency, and consistency.  You can use it to
standardize shebangs and coding across a whole library of Python
scripts.

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 25? ? Wind NW 13 mph


From soring at gmail.com  Wed Nov 22 18:04:33 2006
From: soring at gmail.com (soring at gmail.com)
Date: 22 Nov 2006 15:04:33 -0800
Subject: Accessing feed history in an RSS Reader
References: <1164226615.555781.169150@m73g2000cwd.googlegroups.com>
Message-ID: <1164236673.236541.21600@e3g2000cwe.googlegroups.com>

I'm pretty sure that GoogleReader keeps its own archive on their
servers to provide historical feed items - so you'd have to implement
your own archiving on your server to get the same functionality (unless
GoogleReader publishes any API you could use for this purpose).

In the general case, given any XYZ company that publishes RSS for their
web content, they of course don't have any obligation to keep archives
of their past RSS feeds.

Sorin

Mark S. wrote:
> Anyone know how to access feed history (items not contained in the
> current .xml file), so that an RSS Reader could display historical
> postings?  Google Reader is able to do this.  I'm interested in
> implementing kind of feature in Python.  I've done quite a bit of
> searching to no avail.  Any ideas?



From no-spam at no-spam-no-spam.invalid  Thu Nov 16 15:47:45 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Thu, 16 Nov 2006 21:47:45 +0100
Subject: numpy/scipy: error of correlation coefficient (clumpy data)
In-Reply-To: <1163691740.158339.135610@m73g2000cwd.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
	<ejf6a7$fno$1@news.albasani.net>
	<1163640918.373134.285490@m7g2000cwm.googlegroups.com>
	<ejhaak$g97$1@news.albasani.net>
	<1163691740.158339.135610@m73g2000cwd.googlegroups.com>
Message-ID: <ejiipi$foh$1@news.albasani.net>

sturlamolden wrote:
> robert wrote:
> 
>> Think of such example: A drunken (x,y) 2D walker is supposed to walk along a diagonal, but he makes frequent and unpredictable pauses/slow motion. You get x,y coordinates in 1 per second. His speed and time pattern at all do not matter - you just want to know how well he keeps his track.
> 
> 
> In which case you have time series data, i.e. regular samples from p(t)
> = [ x(t), y(t) ]. Time series have some sort of autocorrelation in the
> samples as well, which must be taken into account. Even tough you could
> weight each point by the drunkard's speed, a correlation or linear
> regression would still not make any sense here, as such analyses are
> based on the assumption of no autocorrelation in the samples or the
> residuals. Correlation has no meaning if y[t] is correlated with
> y[t+1], and regression has no meaning if the residual e[t] is
> correlated with the residual e[t+1].
> 
> A state space model could e.g. be applicable. You could estimate the
> path of the drunkard using a Kalman filter to compute a Taylor series
> expansion p(t) = p0 + v*t + 0.5*a*t**2 + ... for the path at each step
> p(t). When you have estimates for the state parameters s, v, and a, you
> can compute some sort of measure for the drunkard's deviation from his
> ideal path.
> 
> However, if you don't have time series data, you should not treat your
> data as such.
> 
> If you don't know how your data is generated, there is no way to deal
> with them correctly. If the samples are time series they must be
> threated as such, if they are not they should not. If the samples are
> i.i.d. each point count equally much, if they are not they do not. If
> you have a clumped data due to time series or lack of i.i.d., you must
> deal with that. However, data can be i.i.d. and clumped, if the
> underlying distribution is clumped. In order to determine the cause,
> you must consider how your data are generated and how your data are
> sampled. You need meta-information about your data to determine this.
> Matlab or Octave will help you with this, and it is certainly not a
> weakness of NumPy as you implied in your original post. There is no way
> to put magic into any numerical computation. Statistics always require
> formulation of specific assumptions about the data. If you cannot think
> clearly about your data, then that is the problem you must solve.

yes, in the example of the drunkard time-series its possible to go to better model - yet even there it is very expensive (in relation to the stats-improvement) to worry too much about the best model for such guy :-).

In the field of datamining with many datatracks and typically digging first for multiple but smaller correlations - without a practical bottom-up modell, I think one falls regularly back to a certain basic case - maybe the most basic model for data at all: that basic modell is possibly that of a "hunter" which waits mostly, but only acts, if rare goodies are in front of him. 
Again in the most basic case, when having 2D x,y data in front of you without a relyable time-path or so, you see this: a density distribution of points. There is possibly a linear correlation on the highest scale - which you are interested in - but the points show also inhomgenity/clumping, and this rises the question of influence on r_err. What now? One sees clearly that its nonsense to make just plain average stats.
I think this case is a most basic default for data - even compared to the common textbook-i.i.d. case.  In fact, one can recognize such kind of stats, which  repects mere (inhomogous) data-density itself, as (kind of simple/indepent) auto-bayesian stats vs. dumb averaging. 

I think one can almost always do this "bayesian density weighter/filter" as better option compared to mere average stats in that case of x,y correlation when there is obvioulsy interesting correlation but where you are too lazy..to..principally unable to itch out a modell on physics level. The latter requirement is in fact what any averaging stats cries for at any price - but how often can you do it in real world applications ... 

( In reality there is anyway no way to eliminate auto-correlation in the composition of data. Everything and everybody lies :-) )

Thats where a top-down (model-free) bayesian stats approach will pay off: In the previous extreme example of criminal data duplication - I'm sure - it will totally neutralize the attack without question. In the drunkard time-series example it will tell me very reliably how well this guy will keep track - without need for a complex model. In the case of good i.i.d. data distribution it will tell me the same as simple stats. Just good news ...

Thus I can possibly say it so now: I have the problem for guessing linear correlation (coefficient with error) on x,y data with respect to the (most general assupmtion) "bayesian" background of inhomogenous data distribution. 
Therefore I'm seeking a (fast/efficient/approx.) formula for r/r_err. I guess the formula for r does not change (much) compared to that for simple averaging stats, but the formula for r_err will.

Maybe its easy with some existing means of numpy/scipy already. Maybe not. I'm far from finding the (efficient) math myself, but I know what I want - and can see if a formula really does it.


Robert


From ak at silmarill.org  Fri Nov  3 00:20:43 2006
From: ak at silmarill.org (Rainy)
Date: 2 Nov 2006 21:20:43 -0800
Subject: a newbi problem: can't find complete python curses library
In-Reply-To: <mailman.1701.1162530265.11739.python-list@python.org>
References: <mailman.1701.1162530265.11739.python-list@python.org>
Message-ID: <1162531243.194489.99510@b28g2000cwb.googlegroups.com>


krishnakant Mane wrote:
> hello,
> I am a new member to this list.
> I am Krishnakant from India, Mumbai.
> I have been coding in python for quite some time and now I am at the
> intermediate level of programming as far as python is concerned.
> I am going to develop a accounting software that can work on the
> console and accessed through ssh from other terminals.
> I will like to use the curses or ncurses library for the menus and the
> input forms with add, save, delete, update and cancel buttens.
> I also need to create drop down menus with a top level menu bar.
> I read a few articles about python wrapping curses but can't find some
> thing very comprehencive.
> my question is,
> does python possess a complete wrapper to ncurses and its related
> libraries like menu, panel and form?
> if yes then where can I find documentation?
> I read the python documentation and could manage to find out the
> window object but nothing on menus and panels and forms.
> thanks and regards.
> Please help,
> Krishnakant.

How about this short intro?

www.ibm.com/developerworks/linux/library/l-python6.html

It looks like it's got something about menus. Google returns many hits
for 'python curses', you might want to go through the first few pages
of results if you haven't yet.



From will at willNOmcguganSPAM.com  Thu Nov 23 14:44:38 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Thu, 23 Nov 2006 19:44:38 +0000
Subject: Python 2.5 idle and print command How do I suppress a line feed?
In-Reply-To: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>
References: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>
Message-ID: <4565fa04$0$1386$da0feed9@news.zen.co.uk>

notejam wrote:
> Hi,
> I am having a problem with print statements always cause a line feed.
> I need to print a line of text, then the next print statement will
> start printing where the last one stopped rather than drop down a line.
> 
> In basic we can do this with print "texst";   followed by next command
> print "text2"
> So how do I do that in python?
> 

Or if you want to get rid of the space...

import sys
sys.stdout.write("texst")
sys.stdout.write("text2")

-- 
--
work: http://www.kelpiesoft.com
blog: http://www.willmcgugan.com


From paul at boddie.org.uk  Fri Nov 24 06:32:44 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Nov 2006 03:32:44 -0800
Subject: Pimping the 'cgi' module (was: Re: python gaining popularity
	according to a study)
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<ek50ag$q3l$1@news.albasani.net>
	<mailman.670.1164364120.32031.python-list@python.org>
Message-ID: <1164367964.527037.260690@45g2000cws.googlegroups.com>

Christoph Haas wrote:
> On Thursday 23 November 2006 21:29, robert wrote:
> > When a LAMP programmer comes to Python, there are so many different
> > confusing things. It starts with a 'non-documented' cgi module - a
> > 'High-Level-Interface', that cannot even iterate over the form items. A
> > name ZOPE in focus which reveals to be a monster system with 2-year
> > learning-curve, ready for running an article editorial system for TOP-10
> > newspaper companies, but unable to make simple things simple.

Zope was simultaneously one of the best things to happen in Python Web
programming, but also one of the worst, mostly because people saw the
power of the solution, correctly realised that it could do a lot of
things they would otherwise have to do themselves, but then got locked
into an approach which wasn't suitable for every kind of application.
It was like having a handful of fairly promising parties ruined by the
opening night of an expensive nightclub where the first two drinks were
free.

> > A handful of different Djangos - choose one for each weekday and programmer ...

The handful of Djangos isn't necessarily a problem, but there is this
"all or nothing" mentality in writing and promoting Web frameworks. Or
rather, an "all or lots of little pieces" mentality. One is left either
with a room full of tiny Lego bricks to put together, or one actually
has to be the python and swallow a large solution whole, hoping that it
all tastes good - even the nasty parts.

> > And Ruby made it with this single-known simple URL-to-method-router (And
> > possibly when coming from PHP & Perl one recognizes ::@$_$%??%/&... and
> > the old namespace dirt) If there would have been a good cgi-system and a
> > somewhat comfortable advanced URL-to-OO-router (beyond the socket
> > wrapper HTTPServer) well exposed in the Python standard lib, the numbers
> > would be probably very different today ...

There was probably a window of opportunity to include the old Bobo
dispatcher (or perhaps the "Poor Man's Zope" stuff) in the standard
library, but rigid dispatchers of that style arguably aren't sufficient
any more, even though they can be regarded almost as the original
"URL-to-OO router". If you look now, there are a number of
dispatchers/routers that work in a more-or-less independent way from
frameworks, however.

> I can fully second that. Coming from Perl and being used to the CGI module
> that is de-facto standard and already doing things much better than
> Python's equivalent my first thought was: "Does Python really expect me to
> re-invent the wheel to write basic CGIs?" So I started creating
> cookie-based session handlers, form field handling etc.

The standard library expects you to do that, yes, since many of the
Web-related modules were written in the infancy of the Web and have
only been conservatively updated since. I remember when the cookie
handling went in, and it was a big but overdue event back then.

> I rather rely on the standard library unless it's really saving me time and worth learning
> another language. Are frameworks perhaps even telling that the standard
> library is still lacking in some way?

I believe so, and I'm not alone with that opinion.

> I'm thinking of features like:

[List of HTTP-related, persistence-related and templating-related
things]

> I'm ready to invest work and ideas if anyone else is interested.

Take a look at this page for some other work with similar goals:

http://wiki.python.org/moin/WebStandardisation

> Perhaps some day it makes it into the standard library or at least gives us
> something between the features of the standard library and huge framework
> monsters - something people can be pointed at when starting with Python
> and CGIs. I'll probably do that anyway because my web projects all use
> their own reinvented wheel and I'm losing the overview. And even Perl has
> come that route - it started with a cgi-lib.pl which later became
> the 'CGI' standard module.

Some people will argue that you just want a big framework (implying
that they know what you want better than you do), whilst others will
talk about lots of reusable middleware. I don't disagree with the
component-based solution mindset, but the bricks really have to be
bigger, and there needs to be a picture on the box showing what the
finished model looks like, along with some clear instructions on
getting started.

> Is it just a matter of lacking resources or interest? Even if there is no
> interest I'll probably read "man CGI" and "man CGI::Session" again and
> start implementing something nifty for ex-perlies like myself. Hmmm,
> batteries included even for CGI programmers, a man can dream. :)

I am aware of at least one person who seems dissatisfied with the
current level of standardisation and who wants something a bit more
obvious for those who don't want to take the "30 second Wiki" route.
Perhaps they could openly publish their ideas or proposals and we could
establish some kind of unofficial standard around those things. I'd
certainly be interested in moving things forward in that regard.

Paul



From ogbash at gmail.com  Thu Nov 30 11:58:56 2006
From: ogbash at gmail.com (ogbash at gmail.com)
Date: 30 Nov 2006 08:58:56 -0800
Subject: Why are slice indices the way they are in python?
In-Reply-To: <1164860915.349821.309920@14g2000cws.googlegroups.com>
References: <1164860915.349821.309920@14g2000cws.googlegroups.com>
Message-ID: <1164905936.794174.299200@l12g2000cwl.googlegroups.com>


> Why?  It doesn't seem intuitive to me.  To me, it makes it harder, not
> easier, to work with slices than if indexing started at 1 and  the
> above expression got you the 2nd throught the 5th character.

Zero-based indices and excluding last index often works nicer, it is
not the rule, but all my experience says that.

a[i:i] is very handy to have in many algorithms, so you don't have to
exclude this case explicitly.
Index starting at 1 or including N often adds +-1 expressions to the
code. I think that http://en.wikipedia.org/wiki/Modular_arithmetic
makes it more intuitive.

And if talking about dates, then I suggest NEVER use 2006-12-31
23:59:59 in data, always 2007-01-01 00:00:00 instead. If customer wants
to see former on the screen just substruct 1 millisecond from the data
and round it to what is needed. It makes all arithmetics, finding
period collapses, time differences, etc much more painless. You
sometimes don't even know if your database supports seconds,
milliseconds, microseconds and what your operating system and
programming language support. So if you are using inclusive end date
you may find yourself in trouble very soon.

Again, its not intuitive for ordinary people, but math people and
programmers often find 0-based and exlusive ends are nicer to work
with, at least me :)

> Another thing that I've been puzzling over is the pow() function.
>
> pow(x,y) gives x**y.  Fine.
>
> But pow(x,y,z) gives (x**y) % c
>
> I'm curious to know what the pressing reason for such a feature was.
This makes cryptography code 100 times faster.

Oleg



From arkanes at gmail.com  Thu Nov 30 16:34:14 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 30 Nov 2006 15:34:14 -0600
Subject: Beautiful Soup Question: Filtering Images based on their width
	and height attributes
In-Reply-To: <1164919424.990637.98000@h54g2000cwb.googlegroups.com>
References: <1164919424.990637.98000@h54g2000cwb.googlegroups.com>
Message-ID: <4866bea60611301334u6fc24f51jc202c491e5024048@mail.gmail.com>

On 30 Nov 2006 12:43:45 -0800, PicURLPy <fbuchinger at gmail.com> wrote:
> Hello,
>
> I want to extract some image links from different html pages, in
> particular i want extract those image tags which height values are
> greater than 200. Is there an elegant way in BeautifulSoup to do this?
>

Most image tags "in the wild" don't have height attributes, you have
to download the image to see what size it is.

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


From stefan.behnel-n05pAM at web.de  Tue Nov 14 02:50:57 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Tue, 14 Nov 2006 08:50:57 +0100
Subject: HTML Parsing and Indexing
In-Reply-To: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
References: <1163445129.232987.110300@e3g2000cwe.googlegroups.com>
Message-ID: <45597561.4030507@web.de>

mailtogops at gmail.com wrote:
>     I am involved in one project which tends to collect news
> information published on selected, known web sites inthe format of
> HTML, RSS, etc and sortlist them and create a bookmark on our website
> for the news content(we will use django for web development). Currently
> this project is under heavy development.
> 
> I need a help on HTML parser.

lxml includes an HTML parser which can parse straight from URLs.

http://codespeak.net/lxml/
http://cheeseshop.python.org/pypi/lxml

Stefan


From skip at pobox.com  Wed Nov  8 15:56:08 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Nov 2006 14:56:08 -0600
Subject: profanity on comp.lang.python (was Re: Pyro stability)
In-Reply-To: <45522C3E.3050705@mvista.com>
References: <1162694463.711859.200930@h48g2000cwc.googlegroups.com>
	<1162866001.849724.245510@b28g2000cwb.googlegroups.com>
	<mailman.1861.1162937772.11739.python-list@python.org>
	<1162997345.277966.31860@h48g2000cwc.googlegroups.com>
	<eistaq$m7u$1@panix3.panix.com>
	<1163011320.632781.53370@m7g2000cwm.googlegroups.com>
	<45522C3E.3050705@mvista.com>
Message-ID: <17746.17512.702626.550949@montanaro.dyndns.org>


    Carl> You are comparing interviews to usenet.  I somehow see a
    Carl> disconnect.  I don't think many people are going to go to a
    Carl> potential employer and say "hey fuck face, how the fuck are ya?"
    ...
    Carl> Although you mentioned impressing people etc, is it really
    Carl> important to impress people here by watching your P's and Q's?
    Carl> What impresses me here is someone's command of the language, I
    Carl> could really give a rats ass how they choose to disseminate their
    Carl> expertise.

If recent news reports are to be believed (*) it would appear that companies
are starting to check out prospective employees online.  Granted, most of
the stuff I've seen or heard relates to use of social networking sites like
Facebook and MySpace, but I'm sure savvy employers looking for programming
expertise would know to check out Usenet newsgroups and/or relevant mailing
lists.  Anything you post is fair game though.  Also, "command of the
language" can extend to the spoken/written word.

Skip

(*) http://www.nytimes.com/2006/06/11/us/11recruit.html?ei=5090&en=ddfbe1e3b386090b&ex=1307678400


From Jeff.Demel at JavelinDirect.com  Wed Nov 15 10:47:07 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Wed, 15 Nov 2006 09:47:07 -0600
Subject: Python v PHP: fair comparison?
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFC5@DMSP-MSG-EVS01.mail.pvt>

-----Original Message-----
Behalf Of walterbyrd

The problem is that the system requirements for django and turbogears
are sky-high. I think Django requires Apache 2.0 (and maybe mod_python
3.x), and CherryPy (part of turbogears) requires Python 2.4. If you are
developing for a hosted environment, this can be a big problem. Few
enough hosters provide python to begin with, then add to that such
requirements as apache 2.0 - and you left with almost nothing.
--------------------------


That's true, but I was lucky enough to find webfaction.com for python
hosting, including Django.  Good prices and they know Python.  I think
they used to be python-hosting.com or something.

-Jeff
 

This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From tiedon_jano at hotmail.com  Tue Nov 28 04:19:12 2006
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 28 Nov 2006 09:19:12 GMT
Subject: Libgmail
In-Reply-To: <1164703460.303062.58620@80g2000cwy.googlegroups.com>
References: <1164703460.303062.58620@80g2000cwy.googlegroups.com>
Message-ID: <kaTah.74$TE1.10@read3.inet.fi>

linuxfreak wrote:
> hi guys,
> 
> just starting out on python and libgmail... any documentation for
> libgmail outthere... basically what i want to do is develop an
> application to use gmail like and ftp server... should be able to
> upload files and download them as well.... 
> 
> thanks
> 

My browser has this amazing thing called Google installed. It's a kind 
of search facility with which I can search through Internet to find 
information.

By searching for libgmail it gives me about 158000 places to read 
through but if I were you I'd start at the top which is
	libgmail.sourceforge.net

HTH,
Jussi


From ratchetgrid at googlemail.com  Sat Nov 25 09:19:29 2006
From: ratchetgrid at googlemail.com (Nathan Harmston)
Date: Sat, 25 Nov 2006 14:19:29 +0000
Subject: Importing module of data dicts and constants
Message-ID: <676224240611250619s764cb644kb254536e3f7aca2e@mail.gmail.com>

Hi All,

I ve got a single module which I m using to contain a lot of
dictionaries, constants, general information, which are used by
various other modules. However I can't seem to access them:

in data.py
_SEQTYPE_DNA = 0
_SEQTYPE_RNA = 1
_SEQTYPE_PROT = 2
_seqType = { "DNA":_SEQTYPE_DNA, "RNA":_SEQTYPE_RNA, "PROTEIN":_SEQTYPE_PROT }

but in test.py
from data import *

class Test(object):
        def __init__(self, type):
                  self.type = _seqType[type]
        def test(self):
                 return self.type

t = Test("DNA")
print t.test()

File "test.py", line 24, in __init__
    self.type = _seqType[type]
NameError: global name '_seqType' is not defined

I think I m doing something incredibly wrong/stupid here....
Can anyone help?

Many Thanks

Nathan

PS. I was wondering if the use of a data module to store constants and
dictionaries is good design??? or not?


From bituman at enerla.net  Thu Nov 16 06:53:26 2006
From: bituman at enerla.net (bituman)
Date: Thu, 16 Nov 2006 12:53:26 +0100
Subject: pyj file extension
Message-ID: <455C5136.9000303@enerla.net>

I have two questions for the list:
- what extension is pyj ?
- is there a good python debugger that can inspect precompiled python files?

Thank you :)



From kdotsky at gmail.com  Tue Nov 28 16:44:01 2006
From: kdotsky at gmail.com (kdotsky)
Date: 28 Nov 2006 13:44:01 -0800
Subject: urllib2 spinning CPU on read
References: <1164531283.213844.243990@l39g2000cwd.googlegroups.com>
	<87odqse5bk.fsf@pobox.com>
Message-ID: <1164750241.199679.45610@n67g2000cwd.googlegroups.com>


> I didn't try looking at your example, but I think it's likely a bug
> both in that site's HTTP server and in httplib.  If it's the same one
> I saw, it's already reported, but nobody fixed it yet.
>
> http://python.org/sf/1411097
>
>
> John

Thanks.  I tried the example in the link you gave, and it appears to be
the same behavior.

Do you have any suggestions on how I could avoid this in the meantime?



From Thomas.Ploch at gmx.net  Fri Nov 24 11:48:05 2006
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Fri, 24 Nov 2006 17:48:05 +0100
Subject: synching with os.walk()
In-Reply-To: <1164384728.336225.59840@l39g2000cwd.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164384728.336225.59840@l39g2000cwd.googlegroups.com>
Message-ID: <45672245.7060609@gmx.net>


>> os.walk() is a nice generator for performing actions on all files in a
>> directory and subdirectories. However, how can one use os.walk() for walking
>> through two hierarchies at once? I want to synchronise two directories (just
>> backup for now), but cannot see how I can traverse a second one. I do this
>> now with os.listdir() recursively, which works fine, but I am afraid that
>> recursion can become inefficient for large hierarchies.
> 
> I've run into wanting to work with parallel directory structures
> before, and what I generally do is something like:
> 
> for root, dirs, files in os.walk( dir1 ):
>   dir2_root = dir2 + root[len(dir1):]
>   for f in files:
>     dir1_path = os.path.join( root, f )
>     dir2_path = os.path.join( dir2_root, f )
> 

Wouldn't it be better to implement tree traversing into a class, then
you can traverse two directory trees at once and can do funny things
with it?

Thomas



From nick at craig-wood.com  Tue Nov 14 06:30:06 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 14 Nov 2006 05:30:06 -0600
Subject: Using signal.alarm to terminate a thread
References: <12lgk7h55lu0vb4@corp.supernews.com>
	<slrnelgoub.tfa.nick@irishsea.home.craig-wood.com>
	<12lj35aqa9drd8a@corp.supernews.com>
Message-ID: <slrnelj996.paq.nick@irishsea.home.craig-wood.com>

Adrian Casey <adrian.casey at internode.on.net> wrote:
> > Adrian Casey <adrian.casey at internode.on.net> wrote:
> > import os, pexpect, threading
> > 
> > def runyes():
> >         print "Running yes command..."
> >         pexpect.run('yes', timeout=5)
> > 
> > t = threading.Thread(target=runyes)
> > t.start()
> > t.join()
> > 
>  The timeout parameter will not work in this case.  If you run the sample
>  code above, it will run forever.

The above runs just fine for me, stopping after 5 seconds.  Did you
try it?

>  The 'yes' command presents a class of command which can not be
>  easily be handled by pexpect.

Worked for me under Debian/testing.

> As far as I know, mixing threads and signals is OK provided the
> parent creates the alarm.

There are so many pitfalls here that I advise you not to try.  From
the linuxthreads FAQ

  J.3: How shall I go about mixing signals and threads in my program?

  The less you mix them, the better. Notice that all pthread_*
  functions are not async-signal safe, meaning that you should not
  call them from signal handlers. This recommendation is not to be
  taken lightly: your program can deadlock if you call a pthread_*
  function from a signal handler!

  The only sensible things you can do from a signal handler is set a
  global flag, or call sem_post on a semaphore, to record the delivery
  of the signal. The remainder of the program can then either poll the
  global flag, or use sem_wait() and sem_trywait() on the semaphore.

  Another option is to do nothing in the signal handler, and dedicate
  one thread (preferably the initial thread) to wait synchronously for
  signals, using sigwait(), and send messages to the other threads
  accordingly.

Note also that the signal can be delivered to any thread which
complicates things.

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


From webraviteja at gmail.com  Tue Nov 28 00:24:32 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 27 Nov 2006 21:24:32 -0800
Subject: Python script and C++
In-Reply-To: <456b83c7$1@clarion.carno.net.au>
References: <456b83c7$1@clarion.carno.net.au>
Message-ID: <1164691472.172783.151290@n67g2000cwd.googlegroups.com>

Thuan Seah Tan wrote:
> Hi all,
>
>     I am new to python  and currently I am working on a traffic simulation
> which I plan to define the various agents using scripting. It's kind of like
> scripting for non-playable character in games. I am thinking of using python
> for this but I am concerned with running time. Is scripting a lot slower
> compared to direct implementation in C++? Does compiling the script help in
> any way?

Python is perfectly suitable for this use. Python was in use in video
games in this way when computers were a lot slower. I doubt that you
will need to bother compiling the script or see any observable
enhancement if you do.

One example I can remember is Kingdom Under Fire (2001).



From dandolls at yahoo.co.in  Mon Nov 20 15:41:18 2006
From: dandolls at yahoo.co.in (amit saha)
Date: Tue, 21 Nov 2006 02:11:18 +0530
Subject: GUI Design using BOA Constructor
Message-ID: <1164055278.6643.1.camel@localhost>

Hi list!

I was designing a GUI App using BOA Constructor. I have designed the
User Interface.However I cannot figure out how do i add the event
handling code to the buttons and other controls

Please help.

-- 
                               Amit Saha
                           *A proud Ubuntero*
                      amitsaha.in.googlepages.com

                      ,--(_)         |              | 
                  _/ ;-._\    |  | |,-. |  |,--. -+- |  | 
                 (_)(   ) )   |  | |  | |  ||  |  |  |  | 
                   \ ;-'_/    `--' `--' `--''  '  `- `--' 
                              -hrr- `--(_) 

Send instant messages to your online friends http://in.messenger.yahoo.com 


From xi at gamma.dn.ua  Mon Nov 20 06:29:44 2006
From: xi at gamma.dn.ua (Kirill Simonov)
Date: Mon, 20 Nov 2006 13:29:44 +0200
Subject: A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <1163976873.100140.172880@j44g2000cwa.googlegroups.com>
References: <mailman.430.1163877551.32031.python-list@python.org>
	<1163935652.536330.240090@b28g2000cwb.googlegroups.com>
	<mailman.460.1163945882.32031.python-list@python.org>
	<1163976873.100140.172880@j44g2000cwa.googlegroups.com>
Message-ID: <20061120112944.GA23576@58sirius016.dc.ukrtel.net>

On Sun, Nov 19, 2006 at 02:54:33PM -0800, Leo Kislov wrote:
> Kirill Simonov wrote:
> > On Sun, Nov 19, 2006 at 03:27:32AM -0800, Leo Kislov wrote:
> > > IDLE on Windows works fine for your example in interactive console:
> > >
> > > >>> name = raw_input("What's your name? ")
> >
> > Have you tried to use cyrillic characters in a Python string in
> > interactive console? When I do it, I get the "Unsupported characters in
> > input" error. For instance,
> >
> > >>> print "??????"  # That's "Hi" in Russian.
> > Unsupported characters in input
> 
> That works for me in Win XP English, with Russian locale and Russian
> language for non-unicode programs. Didn't you say you want to avoid
> unicode? If so, you need to set proper locale and language for
> non-unicode programs.

Thanks. After I set Russian language for non-unicode programs, the
`print "??????"` expression started to work correctly.

On the other hand,
    >>> print u"??????"
doesn't display "??????". The output looks like a CP1251-encoded string
was displayed using the latin1 character set.

It seems that the interactive interpreter in IDLE uses the CP1251
codepage.

> > Anyway, I just want the interactive console of an IDE to behave like a
> > real Python console under a UTF-8 terminal (with sys.stdout.encoding ==
> > 'utf-8').
> 
> Do you realize that utf-8 locale makes len() function and slicing of
> byte strings look strange for high school students?
> 
> hi = u"??????".encode("utf-8")
> r = u"?".encode("utf-8")
> print len(hi)        # prints 12
> print hi[1] == r   # prints False
> for char in hi:
>     print char      # prints garbage
 
No, it slipped off my mind...

> As I see you have several options:
> 1. Set Russian locale and Russian language for non-unicode programs on
> Windows.

I guess I will go this route.  Looks that IDLE works reasonable well in
CP1251 locale.


Thanks,
Kirill


From inq1ltd at verizon.net  Mon Nov  6 11:07:30 2006
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 06 Nov 2006 11:07:30 -0500
Subject: how do I pass values between classes?
In-Reply-To: <1162796443.570347.91760@e3g2000cwe.googlegroups.com>
References: <1162592180.494470.257040@h54g2000cwb.googlegroups.com>
	<454C9ECF.5020806@websafe.com>
	<1162796443.570347.91760@e3g2000cwe.googlegroups.com>
Message-ID: <200611061107.31106.inq1ltd@verizon.net>


Kath,
You can use this class to pass values around 
without concern for conflicts since it has no 
values of its own.


class Kvariable:
      def setVariable(self, variable):
          self.output = variable

      def showVariable(self):
          print self.output     
      
x = Kvariable()
y = Kvariable()

x.setVariable("James_01")
y.setVariable("Kath_01")

x.showVariable()
y.showVariable()


x.setVariable('3.14159')
y.setVariable("python.org")

x.showVariable()
y.showVariable()

jim-on-linux

http://www.inqvista.com














On Monday 06 November 2006 02:00, kath wrote:
> hi, Larry Bates .... thanks for the reply...
>
> > You might consider doing it the same way wx
> > passes things around. When you instantiate
> > the subclass pass the parent class' instance
> > as first argument to __init__ method.
>
> Yes thats absolutely right..
>
> > That way the subclass can
> > easily pass values back to the parent by
> > using that pointer.
>
> Could you please explain me this.. more
> clearly. I think it is much close to the
> solution.
>
>
> Thank you.
> regards, sudhir


From fredrik at pythonware.com  Wed Nov 22 02:37:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 08:37:43 +0100
Subject: Caution newbie question: python window to stay open ?
In-Reply-To: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
References: <1164165632.072406.111580@f16g2000cwb.googlegroups.com>
Message-ID: <ek0uo7$ppb$1@sea.gmane.org>

mkengel wrote:

> Problem: Python window closes immediately after executing a *.py file
> (e.g. containing a "print..." command.
> What do I have to do to keep it open to see the results ?

Simple scripts that print to a console, or read from it, works best if 
you run them from a standard Command Prompt window.

If you just click on a Python script in the explorer, Windows will 
create a temporary command window, and remove it when the program is 
done.  This is standard Windows behaviour; to get around this in a 
general way, you need to write GUI-oriented Python programs (using e.g. 
Tkinter or wxPython), and run them using the "pythonw.exe" runtime.

For simpler scripts, you can also add

     raw_input("Press return to close this window...")

to the end of the script.

For tips on running Python programs from the command prompt, this page 
might also be helpful:

   http://effbot.org/pyfaq/how-do-i-run-a-python-program-under-windows

</F>



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Nov 29 00:38:51 2006
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 29 Nov 2006 06:38:51 +0100
Subject: Python program that validates an url against w3c markup validator
References: <1164778181.910135.53070@j44g2000cwa.googlegroups.com>
Message-ID: <4t4knbF1280olU1@mid.individual.net>

yaru22 wrote:

> I was looking at the python library and thought urllib or urllib2
> may be used to make this program work.
> 
> But I don't know how to send my urls to the w3c validator and get
> the result.

Another great alternative is using the Twisted framework:

<http://twistedmatrix.com/projects/core/documentation/howto/
index.html>
<http://twistedmatrix.com/documents/current/api/
twisted.web2.client.http.HTTPClientProtocol.html>

Once you get familiar with the style of Twisted code, it's quite
easy to many write clients and servers because most protocols are
already implemented and must only be adapted to your needs.

Regards,


Bj?rn

-- 
BOFH excuse #40:

not enough memory, go get system upgrade



From nobody at nowhere.org  Mon Nov 27 20:10:57 2006
From: nobody at nowhere.org (Nobody)
Date: Tue, 28 Nov 2006 03:10:57 +0200
Subject: MIME encoding change in Python 2.4.3 (or 2.4.2? 2.4.1?) - problem
	and solution
Message-ID: <456B8CA1.30401@nowhere.org>

I have an application that processes MIME messages. It reads a message from a file,
looks for a text/html and text/plain parts in it, performs some processing on these
parts, and outputs the new message.

Ever since I recently upgraded my Python to 2.4.3, the output messages started to
come out garbled, as a block of junk characters.

I traced the problem back to a few lines that were removed from the email package:
The new Python no longer encodes the payload when converting the MIME message to a
string.

Since my program must work on several computers, each having a different version of
Python, I had to find a way to make it work correctly no matter if msg.as_string()
encodes the payload or not.

Here is a piece of code that demonstrates how to work around this problem:

.................. code start ................
import email
import email.MIMEText
import email.Charset

def do_some_processing(s):
    """Return the input text or HTML string after processing it in some way."""
    # For the sake of this example, we only do some trivial processing.
    return s.replace('foo','bar')

msg = email.message_from_string(file('input_mime_msg','r').read())
utf8 = email.Charset.Charset('UTF-8')
for part in msg.walk():
    if part.is_multipart():
        continue
    if part.get_content_type() in ('text/plain','text/html'):
        s = part.get_payload(None, True) # True means decode the payload, which is normally base64-encoded.
        # s is now a sting containing just the text or html of the part, not encoded in any way.

        s = do_some_processing(s)

        # Starting with Python 2.4.3 or so, msg.as_string() no longer encodes the payload
        # according to the charset, so we have to do it ourselves here.
        # The trick is to create a message-part with 'x' as payload and see if it got
        # encoded or not.
        should_encode = (email.MIMEText.MIMEText('x', 'html', 'UTF-8').get_payload() != 'x')
        if should_encode:
            s = utf8.body_encode(s)

        part.set_payload(s, utf8)
        # The next two lines may be necessary if the original input message uses a different encoding
        # encoding than the one used in the email package. In that case we have to replace the
        # Content-Transfer-Encoding header to indicate the new encoding.
        del part['Content-Transfer-Encoding']
        part['Content-Transfer-Encoding'] = utf8.get_body_encoding()

file('output_mime_msg','w').write(msg.as_string())
.................. code end ................

Hope this helps someone out there.
(Permission is hereby granted for anybody to use this piece of code for any purpose whatsoever)


From chrisBrat at gmail.com  Mon Nov 13 09:19:51 2006
From: chrisBrat at gmail.com (Chris Brat)
Date: 13 Nov 2006 06:19:51 -0800
Subject: Python development time is faster.
In-Reply-To: <mailman.58.1163426222.32031.python-list@python.org>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>
	<mailman.58.1163426222.32031.python-list@python.org>
Message-ID: <1163427591.207857.162050@e3g2000cwe.googlegroups.com>

I work full time with Java, but downloaded python about a year ago and
started playing.

I've used it quite a few times in my working environment.



From fredrik at pythonware.com  Tue Nov 28 10:22:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 16:22:30 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <200611281631.38692.mgiann@beta-cae.gr>
References: <200611261804.54669.mgiann@beta-cae.gr>	<mailman.779.1164656450.32031.python-list@python.org>	<Xns9888CD96B985AOKB@199.45.49.11>
	<200611281631.38692.mgiann@beta-cae.gr>
Message-ID: <ekhk7l$lan$1@sea.gmane.org>

Michalis Giannakidis wrote:

> I perfectly understand that this adds significant penalty to the execution of 
> code. But in the way things are, I have to know ( or guess ?) how its 
> function has been implemented.

and that's different from how object orientation usually works in 
exactly what way?

</F>



From bj_666 at gmx.net  Tue Nov 28 06:47:32 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 28 Nov 2006 12:47:32 +0100
Subject: os.walk return hex excapes
References: <mailman.798.1164713355.32031.python-list@python.org>
Message-ID: <pan.2006.11.28.11.47.31.633078@gmx.net>

In <mailman.798.1164713355.32031.python-list at python.org>, Alex S wrote:

> os.walk return hex excape sequence inside a files name, and when i try
> to feed it back to os.remove i get 
> 
> OSError: [Errno 22] Invalid argument:
> 'C:\\Temp\\?p?\xbfS\xbf\xac?G\xaba ACDSee \xbb?a??n a???\xac\xb5\xbfn.exe'

There is no hex escape in that file name, just in the representation you
get in the error message.  The `repr()` form of a string contains just
ASCII, everything outside printable ASCII characters is printed as hex
escape so you can see what the string actually contains without being
interpreted by the shell, IDE or wherever the string is displayed.

How does the real file name look like?

Ciao,
	Marc 'BlackJack' Rintsch



From mail at microcorp.co.za  Tue Nov 21 11:01:22 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 21 Nov 2006 18:01:22 +0200
Subject: rpncalc-2.5 RPN Calculator for Python
References: <BP08h.11171$gl5.2165@tornado.rdc-kc.rr.com><1164009539.310173.248620@m7g2000cwm.googlegroups.com><mailman.524.1164083771.32031.python-list@python.org>
	<1164090836.703397.45350@k70g2000cwa.googlegroups.com>
Message-ID: <000201c70dfe$ebe42440$03000080@hendrik>

"John Machin" <sjmachin at lexicon.net> wrote:
> Hendrik van Rooyen wrote:
> > "John Machin" <sjmachin at lexicon.net> WROTE:
> >
> > > Hendrik van Rooyen wrote:
> > > > "Raymond L. Buvel" <levub137 at wi.rr.com> wrote:
> > > >
> > > >
> > > > > The rpncalc package adds an interactive Reverse Polish Notation (RPN)
> > > >
> > > > Can anyone remember who the Pole was and how his name is spelled?
> > > >
> > > > (no fair googling)
> > >
> > > Remember who: yes
> > > Remember spelling: you must be joking; however I do remember that the
> > > name is given in Knuth TAOCP vol 3 as a test case for the soundex
> > > algorithm.
> > >
> > > name = u"\u0141ukasiewicz" # Python syntax so we're not completely OT
> > > :-)
> > >
> > > The first letter is LATIN CAPITAL LETTER L WITH STROKE.
> >
> > Thanks - I find it disgusting that I am completely unable to remember this -
> >
> > If his name had been Smith or Jones it would be no problem,
> > but just because there are a few too many consonants for me
> > to handle, it is as if there is a total black hole...
> >
> >
>
> A *few* too many? By my count it's 6 consonants compared with 5 in "van
> Rooyen".

That makes it even more disgusting  - that I should go "tilt" so easily...

but this is way off topic now...

- Hendrik



From fredrik at pythonware.com  Wed Nov 22 02:28:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 08:28:55 +0100
Subject: re.match -- not greedy?
In-Reply-To: <750FA239330A7E4CA15D456F37DFF8AE02500B0C@XCH-AU-01.au.nos.boeing.com>
References: <750FA239330A7E4CA15D456F37DFF8AE02500B0C@XCH-AU-01.au.nos.boeing.com>
Message-ID: <ek0u7n$of8$1@sea.gmane.org>

EXI-Andrews, Jack wrote:

 > > that's a misunderstanding of what a regular expression is, though:
 > > conceptually, a RE describes a set of strings, and the RE engine is
 > > designed to answer the question "does this string belong to this
 > > set".

 > if that's so, what is the point of +? and *?   (?)

to influence which string to pick from the set, when a target string can 
match multiple members.

> seems to me it's a bit more pragmatic than pure set membership

your assertion was that a RE should *fail* if you used greedy matching. 
  that's not how RE's work.

</F>



From billpaterson2006 at googlemail.com  Tue Nov 14 05:32:06 2006
From: billpaterson2006 at googlemail.com (billpaterson2006 at googlemail.com)
Date: 14 Nov 2006 02:32:06 -0800
Subject: Seeking assistance - string processing.
Message-ID: <1163500326.492067.234080@k70g2000cwa.googlegroups.com>

I've been working on some code to search for specific textstrings and
act upon them insome way. I've got the conversion sorted however there
is 1 problem remaining.

I am trying to work out how to make it find a string like this "==="
and when it has found it, I want it to add "===" to the end of the
line.

For example.

The text file contains this:

===Heading

and I am trying to make it be processed and outputted as a .dat file
with the contents

===Heading===

Here's the code I have got so far.

import string
import glob
import os

mydir = os.getcwd()
newdir = mydir#+"\\Test\\";

for filename in glob.glob1(newdir,"*.txt"):
    #print "This is an input file: " + filename
    fileloc = newdir+"\\"+filename
    #print fileloc

    outputname = filename
    outputfile = string.replace(outputname,'.txt','.dat')
    #print filename
    #print a

    print "This is an input file: " + filename + ".  Output file:
"+outputfile

    #temp = newdir + "\\" + outputfile
    #print temp


    fpi = open(fileloc);
    fpo = open(outputfile,"w+");

    output_lines = []
    lines = fpi.readlines()

    for line in lines:
        if line.rfind("--------------------") is not -1:
            new = line.replace("--------------------","----")
        elif line.rfind("img:") is not -1:
            new = line.replace("img:","[[Image:")
        elif line.rfind(".jpg") is not -1:
            new = line.replace(".jpg",".jpg]]")
        elif line.rfind(".gif") is not -1:
            new = line.replace(".gif",".gif]]")
        else:
            output_lines.append(line);
            continue
        output_lines.append(new);

for line in output_lines:
    fpo.write(line)

fpi.close()
fpo.flush()
fpo.close()


I hope this gets formatted correctly :-p

Cheers, hope you can help.



From sturlamolden at yahoo.no  Wed Nov 15 20:35:18 2006
From: sturlamolden at yahoo.no (sturlamolden)
Date: 15 Nov 2006 17:35:18 -0800
Subject: numpy/scipy: error of correlation coefficient (clumpy data)
In-Reply-To: <ejf6a7$fno$1@news.albasani.net>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
	<ejf6a7$fno$1@news.albasani.net>
Message-ID: <1163640918.373134.285490@m7g2000cwm.googlegroups.com>


robert wrote:

> here the bootstrap test will as well tell us, that the confidence intervall narrows down by a factor ~sqrt(10) - just the same as if there would be 10-fold more of well distributed "new" data. Thus this kind of error estimation has no reasonable basis for data which is not very good.


The confidence intervals narrows when the amount of independent data
increases. If you don't understand why, then you lack a basic
understanding of statistics. Particularly, it is a fundamental
assumption in most statistical models that the data samples are
"IDENTICALLY AND INDEPENDENTLY DISTRIBUTED", often abbreviated "i.i.d."
And it certainly is assumed in this case. If you tell the computer (or
model) that you have i.i.d. data, it will assume it is i.i.d. data,
even when its not. The fundamental law of computer science also applies
to statistics: shit in = shit out. If you nevertheless provide data
that are not i.i.d., like you just did, you will simply obtain invalid
results.

The confidence interval concerns uncertainty about the value of a
population parameter, not about the spread of your data sample. If you
collect more INDEPENDENT data, you know more about the population from
which the data was sampled. The confidence interval has the property
that it will contain the unknown "true correlation" 95% of the times it
is generated. Thus if you two samples WITH INDEPENDENT DATA from the
same population, one small and one large, the large sample will
generate a narrower confidence interval. Computer intensive methods
like bootstrapping and asymptotic approximations derived analytically
will behave similarly in this respect. However, if you are dumb enough
to just provide duplications of your data, the computer is dumb enough
to accept that they are obtained statistically independently. In
statistical jargon this is called "pseudo-sampling", and is one of the
most common fallacies among uneducated practitioners.

Statistical software doesn't prevent the practitioner from shooting
himself in the leg; it actually makes it a lot easier. Anyone can paste
data from Excel into SPSS and hit "ANOVA" in the menu. Whether the
output makes any sense is a whole other story. One can duplicate each
sample three or four times, and SPSS would be ignorant of that fact. It
cannot guess that you are providing it with crappy data, and prevent
you from screwing up your analysis. The same goes for NumPy code. The
statistical formulas you type in Python have certain assumptions, and
when they are violated the output is of no value. The more severe the
violation, the less valuable is the output.

> The interesting task is probably this: to check for linear correlation but "weight clumping of data" somehow for the error estimation.

If you have a pathological data sample, then you need to specify your
knowledge in greater detail. Can you e.g. formulate a reasonable
stochastic model for your data, fit the model parameters using the
data, and then derive the correlation analytically?

I am beginning to think your problem is ill defined because you lack a
basic understanding of maths and statistics. For example, it seems you
were confusing numerical error (rounding and truncation error) with
statistical sampling error, you don't understand why standard errors
decrease with sample size, you are testing with pathological data, you
don't understand the difference between independent data and data
duplications, etc. You really need to pick up a statistics textbook and
do some reading, that's my advice.



From johnjsal at NOSPAMgmail.com  Wed Nov 15 16:11:00 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 15 Nov 2006 16:11:00 -0500
Subject: Python-2.5.exe?
In-Reply-To: <mailman.198.1163608644.32031.python-list@python.org>
References: <v8H6h.15$895.11@newsfe04.lga>
	<mailman.198.1163608644.32031.python-list@python.org>
Message-ID: <455b824d$0$7054$c3e8da3@news.astraweb.com>

Fredrik Lundh wrote:

> python doesn't depend on the registry settings for normal use, so
> you can simply install python as usual, copy python25.dll from 
> c:\windows\system32 to c:\python25, and then copy (or move) the
> entire c:\python25 tree to your USB drive.

Is it safe to assume that if you do this, Python first looks in 
C:\Python25 for the dll file, before trying to find the non-existent (on 
the USB drive) C:\Windows\System32?

Thanks.


From apardon at forel.vub.ac.be  Tue Nov 21 09:03:04 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Nov 2006 14:03:04 GMT
Subject: Misleading IOerror when opening a non-existent file for append?
References: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
	<1164037676.537263.53480@f16g2000cwb.googlegroups.com>
	<Xns9881A3E1817EArtwfreenetREMOVEcouk@216.196.109.145>
	<1164109830.629768.51130@k70g2000cwa.googlegroups.com>
Message-ID: <slrnem61on.ruo.apardon@rcpc42.vub.ac.be>

On 2006-11-21, jkn <jkn_gg at nicorp.f9.co.uk> wrote:
> Hi there
>     Thanks for the comments. I see that I actually confused myself a
> bit with my posting. It's been a while and I mistook the use of '/' as
> a platform-independent directory delimiter with the use of '\\'.
>
> I also thought that I was seeing something similar on Windows and
> Linux. This may not be the case ;-o.
>
> So, to try again. It looks as it the attempt to open a non-existent
> file (for instance, because the parent folder does not exist) gives an
> odd error on Linux but not on Windows.
>
> On Windows:
>
>> >>> f = file(r'c:\does-not-exist\DoesNotExist.txt','a')
>>
>> Traceback (most recent call last):
>>   File "<pyshell#0>", line 1, in <module>
>>     f = file(r'c:\does-not-exist\DoesNotExist.txt','a')
>> IOError: [Errno 2] No such file or directory: 'c:\\does-not-exist
>> \\DoesNotExist.txt'
>> >>>
>
> (replacing the '\' with '/' gives the same message, which is what I was
> trying to convey)
>
> On Linux, you get the 'Bad mode' error.
>
>     Strange?!

Not on my box (Python 2.4.4c0):

>>> open("nodir/nofile", "a")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: [Errno 2] No such file or directory: 'nodir/nofile'

-- 
Antoon Pardon


From dakman at gmail.com  Thu Nov 16 13:22:57 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 16 Nov 2006 10:22:57 -0800
Subject: Is python for me?
In-Reply-To: <455b395e$0$3184$426a34cc@news.free.fr>
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
	<1163530584.269684.214520@h48g2000cwc.googlegroups.com>
	<455b395e$0$3184$426a34cc@news.free.fr>
Message-ID: <1163701377.322969.109090@h48g2000cwc.googlegroups.com>

Yes of course python can handle of these things, but have you actually
compared them to something written in C? Even if the app was converted
into bytecode, it's still not as fast as an executable, that's all I am
saying.
Bruno Desthuilliers wrote:
> dakman at gmail.com wrote:
> > By large I mean an application with intensive operations, such as a
> > fancy GUI maybe a couple of threads, accessing a database, etc.
> >
>
> Threads are handled by the OS. GUI are (usually) handled by a
> lower-level lib like GTK or such. DB access mostly rely on the
> particular RDBMS. So we're left with the application code itself - the
> glue between all these componants. There's usually nothing really
> "intensive" here, and I wouldn't bet using C++ instead of Python would
> make a huge difference here - wrt/ perceived performances at least.
>
> My 2 cents...
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"



From sthompson at creativewebnet.com  Fri Nov 24 06:35:21 2006
From: sthompson at creativewebnet.com (Steve Thompson)
Date: Fri, 24 Nov 2006 06:35:21 -0500
Subject: Active State and Komodo...
Message-ID: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>

Hello all,

I was wondering the differnced there were betwee Active State's python and
the open source version of python. Would I have to unistall my opend souce
python? Additonally, how does Active State's Komodo IDE vs. the eric3 IDE
unler SuSE Linux v. 10.i?

Addionally, is the eric IDE (version 3) an acceptible IDE or are there
more easy and more productive IDE's for perl?

I'm urining Gnome v. 12.2.2 and Eric v 3.8.1

Thanks Steve


From grante at visi.com  Wed Nov 29 12:00:51 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 29 Nov 2006 17:00:51 -0000
Subject: How to detect what type a variable is?
References: <1164814586.113454.144090@l12g2000cwl.googlegroups.com>
	<1164818738.403393.112900@j44g2000cwa.googlegroups.com>
Message-ID: <12mrf63pm47umef@corp.supernews.com>

On 2006-11-29, eduardo.padoan at gmail.com <eduardo.padoan at gmail.com> wrote:
>
> Leandro Ardissone wrote:
>> Hi,
>>
>> I want to know what type is a variable.
>> For example, I get the contents of an xml but some content is a list or
>> a string, and I need to know what type it is.
>
> You should try to treat it as a list, catch the exceptions raise when
> it is a string (problably ValueError, TypeError ou Attribute error,
> depends on what are you doing),

As you said, it depends on what he's doing.  The problem is
that strings act a lot like lists, and if he's using the subset
of list characteristics that are implimented by strings, there
won't _be_ an exception -- just wrong results.

In the past, I've almost alwasy had to look before I leap when
dealing with both strings and lists.

-- 
Grant Edwards                   grante             Yow!  How's it going in
                                  at               those MODULAR LOVE UNITS??
                               visi.com            


From timothy at open-networks.net  Thu Nov 16 19:11:38 2006
From: timothy at open-networks.net (timmy)
Date: Fri, 17 Nov 2006 10:11:38 +1000
Subject: Secure Python
In-Reply-To: <4s38t9Ftln2aU1@mid.uni-berlin.de>
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au> <4s38t9Ftln2aU1@mid.uni-berlin.de>
Message-ID: <455cfdb8$1@quokka.wn.com.au>

Diez B. Roggisch wrote:
>>as posted before, linux kernel limit.
>>
>>then you and your users can go as crazy as you want and you won't take
>>out your system.
>>
>>maybe you should think a little more before going on the attack like that.
> 
> 
> You should maybe read a little bit more when making bold statements about
> the feasibility of a sandboxed _PYTHON_. The OP wrote:
> 

there is nothing preventing you putting limits on the resources each 
process uses, on just about any modern day OS

> At least to me - and I presume pretty much everybody except you in this
> thread - 

Oh no i understand perfectly what he wants, i merely suggest a simple OS 
based solution.

this means that he is interested in executing arbitrary pieces of
> python code inside the interpreter, which comes from e.g. players who
> customize their in-game behavior of their avatars. 
> 
> Now how exactly does linux (or any other resource limiting technique on any
> OS) help here - killing the whole game server surely isn't a desirable
> solution when one player goes berserk, might it be intentionally or not.

resource managment does not kill anything it merely prevents one process 
running away and consuming the whole server. this is EXACTLY what he is 
afraid of.
if he intends on running arbitrary code then i suggest he spawns each 
one as a seperate thread with a spefic name and merely set limits on all 
  processes named X. that way he can run any whacky code he wants safely 
inside those processes without fear of any one of them crashing the 
server. I know it can be done under any of the nix's, I'm not sure how 
to do so under windows, but it could probably be done.

> 

> It is a recurring and pretty much understandable request on c.l.py to be
> able to do so - sometimes it arises in the disguise of killable threads.
> But unfortunately the solution doesn't seem to be as simple as one would
> wish.

i can understand people wanting an application based cross platform 
solution to this, but i'm yet to see anything practicle hence i suggest 
and OS based solution.

> 
> Diez


From researchbase at gmail.com  Fri Nov 17 14:20:29 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Sat, 18 Nov 2006 00:50:29 +0530
Subject: how to print pdf with python on a inkjet printer.
In-Reply-To: <ejk7j8$f5t$1@sea.gmane.org>
References: <mailman.277.1163700699.32031.python-list@python.org>
	<h4oql2ts1vtse5ulcg1vmqqm5glg6o5f4p@4ax.com>
	<f81479dd0611170314x4a9bd8d3ldab6f295b31533a5@mail.gmail.com>
	<ejk7j8$f5t$1@sea.gmane.org>
Message-ID: <f81479dd0611171120t7ab9cc06x8d1b7a3eaa3c5161@mail.gmail.com>

On 17/11/06, Fredrik Lundh <fredrik at pythonware.com> wrote:

>      http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
>
> or possibly:
>
>      http://www.planetpdf.com/forumarchive/49365.asp
I can't figure out where is the win32api module in my system.
I think I need to download it.
I tried to search but did not find it.
what is the url for this module and does it also have documentation.
thanking you.
Krishnakant.


From steve at REMOVE.THIS.cybersource.com.au  Thu Nov 23 06:34:18 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 23 Nov 2006 22:34:18 +1100
Subject: "10, 20, 30" to [10, 20, 30]
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
Message-ID: <pan.2006.11.23.11.34.17.343085@REMOVE.THIS.cybersource.com.au>

On Thu, 23 Nov 2006 03:13:10 -0800, Daniel Austria wrote:

> Sorry,
> 
> how can i convert a string like "10, 20, 30" to a list [10, 20, 30]
> 
> what i can do is:
> 
> s = "10, 20, 30"
> tmp = '[' + s + ']'
> l = eval(tmp)
> 
> but in my opinion this is not a nice solution


It is a dangerous solution if your data is coming from an untrusted source.

>>> s = "10, 20, 30"
>>> L = [x.strip() for x in s.split(',')]
>>> L
['10', '20', '30']
>>> L = [int(x) for x in L]
>>> L
[10, 20, 30]

Or, as a one liner:  [int(x.strip()) for x in s.split(',')]


-- 
Steven.



From kinch1967 at gmail.com  Wed Nov 29 01:47:51 2006
From: kinch1967 at gmail.com (bullockbefriending bard)
Date: 28 Nov 2006 22:47:51 -0800
Subject: 6 Pick Bet Grouping
In-Reply-To: <1164772251.325678.45990@l39g2000cwd.googlegroups.com>
References: <1164768957.528355.210070@16g2000cwy.googlegroups.com>
	<1164772251.325678.45990@l39g2000cwd.googlegroups.com>
Message-ID: <1164782871.330950.272460@j44g2000cwa.googlegroups.com>

Sorry, I perhaps didn't frame my initial post very well. I hope my
reply to your other post below has answered these questions.



From fd0man at gmail.com  Fri Nov 17 16:51:44 2006
From: fd0man at gmail.com (Michael B. Trausch)
Date: Fri, 17 Nov 2006 16:51:44 -0500
Subject: Decimal() instead of float?
In-Reply-To: <ejl5s5$334$1@sea.gmane.org>
References: <1163294604.4675.4.camel@pepper> <ej9epb$e23$2@sea.gmane.org>
	<1163511997.4675.88.camel@pepper> <4559F828.7070704@holdenweb.com>
	<ejeuqb$ldd$1@sea.gmane.org> <1163794251.5107.151.camel@pepper>
	<ejl5s5$334$1@sea.gmane.org>
Message-ID: <1163800304.5107.179.camel@pepper>

On Fri, 2006-11-17 at 21:25 +0100, Fredrik Lundh wrote:

> > Some of the lat/long pairs that I have used seem to come out fine, but 
> > some do not.  Because the mathmatics used with them involve complex 
> > equations when determining distance and the like, any error gets 
> > massively compounded before a final result is evident.
> 
> sorry, but I don't think you have the slightest idea what you're doing, 
> really.
> 


Sure, I do.  Let's say that I want to work with the latitude 33.6907570.
In Python, that number can not be stored exactly without the aid of
decimal.Decimal().

>>> 33.6907570
33.690756999999998
>>> 

As you can see, it loses accuracy after the 6th decimal place.  That's
not good enough:  I have 8 numbers that need to be exact, and I am only
getting six.  That error will propagate throughout any multiplication or
division problem.  The error compounds itself:

>>> x = 33.6907570
>>> x
33.690756999999998
>>> x*2
67.381513999999996
>>>

Now, observe what happens when you compute it exactly:

>>> from decimal import *
>>> xx = Decimal('33.6907570')
>>> xx
Decimal("33.6907570")
>>> xx*2
Decimal("67.3815140")

Now, observe what happens when you compare the differences
pre-multiplication and post-multiplication:

>>> x = Decimal('33.6907570')
>>> y = Decimal('33.690756999999998')
>>> x - y
Decimal("2E-15")
>>> x = Decimal('67.3815140')
>>> y = Decimal('67.381513999999996')
>>> x - y
Decimal("4E-15")
>>> 

The discrepancy has carried over and been compounded?and this was a
simple multiplication, not something more advanced.

Now, while 4e-15 is a relatively small difference, it is a difference
that will continue to grow due to the inexact nature of the numbers.
This is proof enough that when exact precision is needed, the regular
floating point numbers should not be used.  *I* need exact numbers?plain
and simple.  Those are the requirements for the project I am working on,
and thus I must adhere to them?and they are non-negotiable, which is why
I had opened this thread to begin with.  I wanted to know if there was a
way to simply switch the default mechanism, that's all.  Quite simply,
we're talking about a project where the requirements are absolutely zero
tolerance for error?and it is clearly evident that Python cannot use a
float to store a simple latitude number without causing some error in
the precision.  And it doesn't take a genius to realize that when you
introduce an error?even a minuscule one?into a long sequence of
equations, and those equations involve multiplication and division, the
error becomes compounded and unpredictable.

An example:

>>> 1.1
1.1000000000000001
>>> 1.1+0.1
1.2000000000000002
>>> 1.2
1.2
>>> 1.1*100000
110000.00000000001
>>> 

This does not make any sense at all.  Why is 1.1 == 1.1 and some change,
and 1.1 + 0.1 is off, but 1.2 is not off on its own?  Or, for that
matter, why doesn't the default float type recognize that 1.1*100000 =
110000 without any more floating point?  It is a whole number.

Perhaps you should not make assumptions; I am sure that you have heard
what they do at some point before.  While *some* of the error doesn't
propagate as expected (which is actually a problem in itself?equations
no longer make sense if they are not mathematically balanced!) some
does.  It is unpredictable and can't be tolerated when the numbers must
come out exactly.

    ? Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
   Jabber IM: fd0man at livejournal.com

Demand Freedom!  Use open and free protocols, standards, and software!
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From email at christoph-haas.de  Fri Nov 24 08:04:23 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Fri, 24 Nov 2006 14:04:23 +0100
Subject: Pimping the 'cgi' module
In-Reply-To: <ek6ncq$7pp$1@news.albasani.net>
References: <1164306918.845529.95820@f16g2000cwb.googlegroups.com>
	<mailman.670.1164364120.32031.python-list@python.org>
	<ek6ncq$7pp$1@news.albasani.net>
Message-ID: <200611241404.23599.email@christoph-haas.de>

On Friday 24 November 2006 13:08, robert wrote:
> well, note, for that they have named it Ruby-On-Rails, so its still the
> language - leveraged. While it is Zope/Django/Ego-on-Python ... ?

If by that you mean that neither Zope nor Django are exactly pythonic I 
think I concur.

> Unless a Guido'ed version of such thing is not _selected_ into the
> stdlib or at least promoted single-mindedly and prominently by far
> before high-tech-but-low-number names like Zope and Django, Python will
> continue to bleed out heavily on numbers vs. Ruby.

Guido seems to have been confused about the rank growth of web based 
frameworks himself. So it's even less likely one of them gets included as 
part of the standard library in finite time.

> First need of course: an update of that cgi "module".

Oh, yeah. I just joined the Web SIG and found out that WSGI seems the way 
to go. At a first look it seems horrible if you just want to provide a CGI 
module. But there must be some reason for its existence. :) Looking 
further through http://wiki.python.org/moin/WebFrameworks my head starts 
to spin. Somehow I sadly feel I would just add another incomplete 
framework to that pile.

I'm especially unsure whether it's good or bad to create another "I'm sick 
of the standard library"-style module. I've just become a bit less 
confident to actually contribute something useful there. Overwhelming.

> python-dev is fully occupied with top-notch inner life. Of course that
> is the basis. But key issues in lib&tools were simply forgotten - left
> to a random community.

Which doesn't match the "batteries included" fuss at all. Of course the 
basis has to be good, too. And there are so many paradigms today that no 
core-python developer can really be expected to provide good standard 
modules for everyone.

> Go for a start. In order to realize that essential batteries in good
> quality within time - even after 10 years now - it is necessary, to hook
> python-dev for even requesting it actively. Just adding to
> http://wiki.python.org/moin/WebProgramming and
> http://wiki.python.org/moin/WebFrameworks is not the task. It requires
> some organization and somewhat a selection process in addition to good
> (probably existing) code v0.1xxx material. I think it would not be
> overly complex. Both, a new cgi and possibly included snake "rails" (vs
> "oil")

Oil is deprecated anyway. :) I'll see if I can find my way into the SIG. 
And - yes - adding another framework will surely not help us out of the 
divergence. The more frameworks there are the more people seem to feel 
urged to say "heck, it will be easier to write my own framework than 
evaluate all 30 packages on that page".

 Christoph


From will at willNOmcguganSPAM.com  Thu Nov 23 14:41:13 2006
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Thu, 23 Nov 2006 19:41:13 +0000
Subject: Python 2.5 idle and print command How do I suppress a line feed?
In-Reply-To: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>
References: <1164310576.767673.297470@h54g2000cwb.googlegroups.com>
Message-ID: <4565f93d$0$1493$db0fefd9@news.zen.co.uk>

notejam wrote:
> Hi,
> I am having a problem with print statements always cause a line feed.
> I need to print a line of text, then the next print statement will
> start printing where the last one stopped rather than drop down a line.
> 
> In basic we can do this with print "texst";   followed by next command
> print "text2"
> So how do I do that in python?
> 

Thusly...

print "texst",
print "text2"

--
work: http://www.kelpiesoft.com
blog: http://www.willmcgugan.com


From bearophileHUGS at lycos.com  Thu Nov 30 03:20:06 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Nov 2006 00:20:06 -0800
Subject: Remarkable results with psyco and sieve of Eratosthenes
In-Reply-To: <1164849303.053474.97990@j72g2000cwa.googlegroups.com>
References: <1164837289.295731.178070@h54g2000cwb.googlegroups.com>
	<456e08ba$0$1505$db0fefd9@news.zen.co.uk>
	<1164849303.053474.97990@j72g2000cwa.googlegroups.com>
Message-ID: <1164874805.870343.21980@j72g2000cwa.googlegroups.com>

George Sakkis:
> You can also save an attribute lookup for append; just add
> append = primes.append
> outside of the loop and replace primes.append(x) with append(x)
> That should cut down a few fractions of second.

We were talking about Psyco, and I think with Psyco (just released for
Py 2.5, BTW) such tricks are less useful.

Bye,
bearophile



From jstroud at mbi.ucla.edu  Tue Nov 14 19:03:34 2006
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 15 Nov 2006 00:03:34 GMT
Subject: refactoring so that multiple changes can be made with one
	variable?
In-Reply-To: <4559e396$0$32430$c3e8da3@news.astraweb.com>
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <qPs6h.10450$yl4.9413@newssvr12.news.prodigy.com>

John Salerno wrote:
> My code is below. For now I'm focusing on the lines where health (and 
> armor) are increased in each character class. Let's say I decided to 
> change the amount of increase in the future. As it is now, I'd have to 
> go to each character class and change the number so that each is still 
> in a good relation to the other (right now: 3, 2, 1; later: perhaps 4, 
> 3, 2, 1, if I added a new class -- i.e., change Fighter from 3 to 4, 
> Thief from 2 to 3, in other words increase them all by 1). So instead of 
> changing each one, is there a simple, clean way of just changing a 
> single number so that this change is reflected in all classes? Hope that 
> makes sense.
> 
> 
> 
> class Character(object):
>     def __init__(self, name, strength, dexterity, intelligence):
>         self.name = name
>         self.health = 10
>         self.armor = self.attack = self.defense = self.magic_attack = \
>             self.magic_defense = 0
>         self.strength = strength
>         self.dexterity = dexterity
>         self.intelligence = intelligence
>         self.adjust_attributes()
> 
>     def adjust_attributes(self):
>         pass
> 
> 
> class Fighter(Character):
>     def adjust_attributes(self):
>         self.health += 3
>         self.armor += 3
>         self.attack += 2
>         self.defense += 2
>         self.strength += 1
> 
> 
> class Thief(Character):
>     def adjust_attributes(self):
>         self.health += 2
>         self.armor += 2
>         self.attack += 1
>         self.defense += 1
>         self.magic_defense += 1
>         self.dexterity += 1
> 
> 
> class Mage(Character):
>     def adjust_attributes(self):
>         self.health += 1
>         self.armor += 1
>         self.magic_attack += 2
>         self.magic_defense += 2
>         self.intelligence += 1

The place to do this seems to be in the Character class.

class Character(object):
     _health_base_inc = 1
     _armor_base_inc = 1
     # etc
     def __init__(self, name, strength, dexterity, intelligence):
         self.name = name
         self.health = 10
         self.armor = self.attack = self.defense = self.magic_attack = \
             self.magic_defense = 0
         self.strength = strength
         self.dexterity = dexterity
         self.intelligence = intelligence
         self.adjust_attributes()

     def adjust_attributes(self):
         pass

class Mage(Character):
     # for symmetry with Character
     _health_char_inc = 1
     _armor_char_inc = 1
     # etc
     def adjust_attributes(self):
       self.health += self._health_char_inc + self_health_base_inc
       self.armor += self._armor_char_inc + self._armor_base_inc
       # etc

James

-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From martin at v.loewis.de  Thu Nov 16 18:00:08 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 17 Nov 2006 00:00:08 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
References: <edfc7$455cd28b$59ad1aca$8718@news.flashnewsgroups.com>
Message-ID: <455CED78.1060604@v.loewis.de>

gabor schrieb:
> so basically i'd like to ask here: am i reading something incorrectly?

You are reading it correctly. This is how it behaves.

> or am i using os.listdir the "wrong way"? how do other people deal with
> this?

You didn't say why the behavior causes a problem for you -  you only
explained what the behavior is.

Most people use os.listdir in a way like this:

for name in os.listdir(path):
  full = os.path.join(path, name)
  attrib = os.stat(full)
  if some-condition:
    f = open(full)
  ...

All this code will typically work just fine with the current behavior,
so people typically don't see any problem.

Regards,
Martin


From Andreas.Ames at comergo.com  Mon Nov 13 13:25:03 2006
From: Andreas.Ames at comergo.com (Ames Andreas)
Date: Mon, 13 Nov 2006 19:25:03 +0100
Subject: Singleton Class Exception
Message-ID: <552B6B925278EF478EA8887D7F9E5AC301816443@tndefr-ws00024.tenovis.corp.lan>

> -----Original Message-----
> From: python-list-bounces+andreas.ames=comergo.com at python.org 
> [mailto:python-list-bounces+andreas.ames=comergo.com at python.or
> g] On Behalf Of Dan Lenski
> Sent: Monday, November 13, 2006 7:05 PM
> Subject: Re: Singleton Class Exception
> 
> dischdennis wrote:
> > the line "raise Singleton.__single" invokes in my class the 
> following
> > error:
> >
> > exceptions must be classes, instances, or strings (deprecated), not
> > PurchaseRequisitionController
> 
> Denis,
> Jason's explanation is correct!  You are trying to use the Singleton

I don't think so.  The op wrote that he uses 2.4.3.  So I guess, the 
problem is, that PurchaseRequisitionController inherits (directly or 
not) from 'object'.  Although new style classes are allowed as 
exceptions in 2.5, an additional requirement is, that the exception 
must inherit from BaseException (or must not be a new style class 
instance at all, as before).


cheers,

aa

-- 
Andreas Ames | Programmer | Comergo GmbH |
Voice:  +49 69 7505 3213 | ames AT avaya DOT com


From andre.burgaud at gmail.com  Thu Nov 23 09:03:31 2006
From: andre.burgaud at gmail.com (Andre Burgaud)
Date: Thu, 23 Nov 2006 08:03:31 -0600
Subject: Porting Tkinter application to JYthon
In-Reply-To: <1164289006.543874.307110@l12g2000cwl.googlegroups.com>
References: <mailman.619.1164257988.32031.python-list@python.org>
	<1164289006.543874.307110@l12g2000cwl.googlegroups.com>
Message-ID: <158731350611230603v41382941j65adef0550391aa3@mail.gmail.com>

Hi Sandip,

JPype could be a solution to implement the second option mentioned by Tim:
http://jpype.sourceforge.net/

Thanks,

Andre
http://www.burgaud.com/




On 23 Nov 2006 05:36:46 -0800, Tim N. van der Leeuw <tnleeuw at gmail.com>
wrote:
>
> Hi,
>
> sandip desale wrote:
> > Dear All,
> >
> > We have a Tcl/Tk application written using Python 2.2. Using this
> application we want to call some customizable Java APIs. I tried porting
> Tcl/Tk application to Jython but not able to do the same as TKinter library
> is not available with JYthon.
> >
> > Can you please help me in porting Tkinter application to Jython? Also
> kindly let me know how to do the same.
>
> Not having Tkinter in Jython, you can either rewrite your app to be a
> Java Swing app, or you can embed the Java JVM into the Python
> interpreter as an importable library. I believe some projects exist to
> enable the latter, although I don't know of a URL.
>
> Cheers,
>
> --Tim
> >
> >
> > Thanks & Regards,
> > Sandip Desale
> >
> >
> > --
> >
> > Search for products and services at:
> > http://search.mail.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From klaus at seistrup.dk  Wed Nov 22 08:18:53 2006
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Wed, 22 Nov 2006 13:18:53 +0000 (UTC)
Subject: How to sort list
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
	<ejvjno$549$2@minji.szn.dk>
	<mailman.579.1164186923.32031.python-list@python.org>
Message-ID: <ek1int$aos$1@minji.szn.dk>

Fredrik Lundh wrote:

> note that DSU is built into Python these days:
>
>      L.sort(key=transform)

Sweet, thanks for the hint.

Cheers,

-- 
Klaus Alexander Seistrup
http://klaus.seistrup.dk/


From cyberco at gmail.com  Mon Nov 20 04:58:47 2006
From: cyberco at gmail.com (cyberco)
Date: 20 Nov 2006 01:58:47 -0800
Subject: fileinput.input('test.txt') => ERROR: input() already active
In-Reply-To: <ejrqnb$5o3$02$1@news.t-online.com>
References: <1164011174.630226.91580@j44g2000cwa.googlegroups.com>
	<ejrqnb$5o3$02$1@news.t-online.com>
Message-ID: <1164016727.678036.225640@e3g2000cwe.googlegroups.com>

Ah, thanks!
Another related question I have: The following piece edits in place,
but ads whitelines between all lines of a Windows text file. Why?

===========================
fi = fileinput.input('test.txt', inplace=1)
for l in fi:
    print l.replace('a', 'b')
===========================



From sjmachin at lexicon.net  Fri Nov 24 15:47:18 2006
From: sjmachin at lexicon.net (John Machin)
Date: 24 Nov 2006 12:47:18 -0800
Subject: SQLite3__Python2.3-SQLite__Problem
In-Reply-To: <1164325325_8617@sp6iad.superfeed.net>
References: <1164325325_8617@sp6iad.superfeed.net>
Message-ID: <1164401238.582515.226860@45g2000cws.googlegroups.com>

Cousin Stanley wrote:
> It's been almost 2 years since I've done anything
>   with Python and SQLite and I'm having some problems
>   that I don't recall from my last usage ....
>
>   It seems that SQLite3 data bases created at the command line
>   and those created using the sqlite module from within Python
>   are no longer compatible with each other using the setup that
>   I now have ....
>
>   I thought I remembered that the data bases created either way
>   were always 100% transparent with each other and that I could
>   use an SQLite3 data base either from the command line or from
>   within Python without any problems at all ....

My guess is that 2 years ago you were using sqlite 2, not 3.

>
>   I did a fair amount of Google-izing looking for related problems
>   but didn't have much success ....
>

In that case your googler is absolutely rooted and should be replaced
immediately.

With mine, google("file is encrypted or is not a database") produces as
first hit (would you believe!?)
http://wiki.rubyonrails.org/rails/pages/HowtoUseSQLite
which contains the text:

"""
Q: SQLite::Exceptions::\DatabaseException file is encrypted or is not a
database.

A: It seems that sqlite databases created with version 2 do not work
with sqlite version 3 and vice versa.
"""

IOW sqlite is a candidate for nomination to the "We Could Have Given A
Much More Helpful Error Message" Hall of Illfame :-)

Alternatively, you could get it straight from the the horse's mouth, at
http://www.sqlite.org/version3.html

"""The format used by SQLite database files has been completely
revised. The old version 2.1 format and the new 3.0 format are
incompatible with one another. Version 2.8 of SQLite will not read a
version 3.0 database files and version 3.0 of SQLite will not read a
version 2.8 database file."""

According to http://www.sqlite.org/oldnews.html, the first non-beta
version of 3.0 was released in September 2004. You appear to have a 3.2
version of the sqlite3 command-line utility. So far, so good. However,
I would be very suspicious of an sqlite that came with Python 2.3 --
it's probably sqlite version 2.something

>From your 2nd message:

> I'm now off to look for a version of PySQLite2
> that is built for Debian Sarge and Python 2.3
> to see if that might help to rectify the problem ....

Sounds like a good idea. Change it to read "that has been built
*recently*" and it sounds like an even better idea :-)

On Windows, with Python 2.4 (just like your trial):

| >>> from pysqlite2 import dbapi2 as DB
| >>> DB.version # version of pysqlite2
| '2.3.2'
| >>> DB.sqlite_version # This is the one that matters!
| '3.3.6'

Try extracting sqlite_version from your Linux setup.

Aside: with Python 2.5:
| >>> import sys; sys.version
| '2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]'
| >>> import sqlite3; sqlite3.sqlite_version
| '3.3.4' # time warp?

As you are discovering with Debian, one of the downsides of having
3rd-party goodies bundled in instead of downloading and installing them
yourself is that thay can become frozen in time -- not quite as bad as
the ruins of Pompeii; although Python 2.3 is getting close :-)

HTH,
John



From dandolls at yahoo.co.in  Fri Nov 24 15:16:50 2006
From: dandolls at yahoo.co.in (amit saha)
Date: Sat, 25 Nov 2006 01:46:50 +0530 (IST)
Subject: Python on your mobile phone
Message-ID: <20061124201650.48035.qmail@web7613.mail.in.yahoo.com>


Hi list!
The most exciting thing that i am doing offlate has been this. I am programming on my mobile using my new favourite language, Python.
Though this thing might not be new to many of you, but then i am a late
starter. And i was completely ignorant of this before partly because i
did not have the "proper" phone and also i never thought of Python so seriously as i do now.
This article will serve a dual purpose. Those of you ignorant of Python will start appreciating this simple,elegant and powerful language and also make you start doing more with your mobile phone.

For me, it is something which will keep me busy everywhere now,
during journeys, during boring class hours,during power cuts and every
single second which used to be wasted earlier.



Access the full text here.


http://geocities.com/amit_saha_works/python/python-s60.html

 

Amit Saha

*A Proud Ubuntero*

http://amitsaha.in.googlepages.com








  

  









		
__________________________________________________________
Yahoo! India Answers: Share what you know. Learn something new
http://in.answers.yahoo.com/


From python-url at phaseit.net  Mon Nov 20 18:22:51 2006
From: python-url at phaseit.net (Paul Boddie)
Date: Mon, 20 Nov 2006 23:22:51 +0000 (UTC)
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Nov 20)
Message-ID: <ejtdcb$v1d$1@lairds.us>

QOTW: "I think you've got the wrong intuition about the balance between the 
amount of bandwidth and the amount of computation a given numer [sic] of 
dollars would buy.  You've hundreds of CPU cycles available per bit 
transmitted; space enough to stick in even Python." - Thomas Womack
    (on comp.lang.lisp, earlier this year, so it's not a true QOTW)
    http://groups.google.com/group/comp.lang.lisp/msg/453239d7b8e0ef72

"I'm a recent, belated convert from Perl.  I work in a physics lab and
have been using Python to automate a lot of measurement equipment lately. 
It works fabulously for this purpose." - Dan Lenski


    On the subject of Python and large volumes of data, it would seem
    that maps and data visualisation are a natural combination for the
    pydap treatment:
        http://taoetc.org/27

    "MIT to try Python ...":
	http://www.amk.ca/diary/2006/11/mit_to_try_python_for_introduc.html
    
    A treatment of many different domains can be found in the itools
    package (and the 21 subpackages of the 0.14.5 release!):
        http://groups.google.com/group/comp.lang.python.announce/browse_frm/thread/4f0480456bfac121/
        http://www.ikaaro.org/itools
    
    Problems with Python 2.5 portability? Or, more precisely, with
    extension modules not working with the new release?
        http://mail.python.org/pipermail/python-dev/2006-November/069967.html

    BaseHTTPRequestHandler accesses POST data through rfile:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/c928f2ab0f5c1e63/

    pyparsing and itertools:  wise coders ready to move past RE know 'em both:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/85646f5cbd7e0718/
    
    Is comparing Python and PHP a "fair comparison"? The debate focuses
    on many things that make languages popular for Web applications:
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/4156e7f6d5a90c84/
    
    The big news outside the Python community last week was the surprising 
    GPL-licensing of many of Sun's Java technologies. So, will GPL-licensed
    Java eat into Python's market share?
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/e52bf7ac89325485/
    
    All these comparisons whet the appetite for some real advocacy,
    coordinated by the Python Software Foundation's own man:
        http://groups.google.com/group/comp.lang.python.announce/browse_frm/thread/c71513d3fbed25ef/
    
    Advocacy applies at all levels, of course, backed up by
    comparisons, tests, benchmarks... In the Web opinions shootout
    it's TurboGears vs. Django:
        http://groups.google.com/group/turbogears/browse_frm/thread/a37037677b067872
    
    And Django vs. Rails:
        http://groups.google.com/group/django-users/msg/328151a262c00eb0
    
    The conflict (good natured, of course) extends to literature as
    the TurboGears book hits the shelves:
        http://groups.google.com/group/turbogears/msg/318bfff14bcf0ef3
    
    Whilst the Django book - still a work in progress - is readable in its 
    evolving form:
        http://www.djangobook.com
    
    Decide between the Web programming options yourself, but without
    really installing anything. Be prepared for quite a choice, as
    noted by a Django lead developer on the TurboGears discussion group!
        http://www.vmware.com/vmtn/appliances/directory/289
    
    And even if you're a disinterested observer, the battle of these big 
    frameworks still provides benefits to those just looking for decent Web 
    hosting (and bringing us full circle to that PHP vs. Python discussion):
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/17718e04ab4a6e25/
    
    Secure Python: is running untrusted code a good idea, and is it
    Python or the operating system who can offer the most help?
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/fb27c42ee21afcaf/
    
    And what about "untrusted" contributors to your blog's comments.
    There's SpamBayes for e-mail, but can one filter blog comments in
    the same way?
        http://www.larsen-b.com/Article/244.html
    
    As people continually note, as CPython motors onward with many
    new features, Jython struggles to keep up. Could the biggest
    motivational force behind its revival really be the principal
    developer of JRuby?
        http://headius.blogspot.com/2006/11/jython-alive-and-well-and-looking-for.html
    
    But don't start to think that old releases of Python don't see
    any action. Here, Python 1.5.2 makes an appearance on Telit's
    GSM/GPRS telecoms/networking modules:
        http://www.telit.co.it/modules.asp?lang=1


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

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

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

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

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

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

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

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

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

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

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

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

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

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

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

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

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

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

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


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

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


-- The Python-URL! Team--

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


From __peter__ at web.de  Tue Nov 28 04:55:15 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 28 Nov 2006 10:55:15 +0100
Subject: How to increase the speed of this program?
References: <1164699156.682944.97410@j44g2000cwa.googlegroups.com>
	<ekgt97$31p$00$2@news.t-online.com>
	<ekgto0$khn$02$1@news.t-online.com>
	<1164706548.778583.267730@n67g2000cwd.googlegroups.com>
	<ekh0nm$9sh$00$1@news.t-online.com>
Message-ID: <ekh10m$9sh$00$2@news.t-online.com>

Peter Otten wrote:

> Leo Kislov wrote:
> 
>> 
>> Peter Otten wrote:
>>> Peter Otten wrote:
>>>
>>> > HYRY wrote:
>>> >
>>> >> I want to join two mono wave file to a stereo wave file by only using
>>> >> the default python module.
>>> >> Here is my program, but it is much slower than the C version, so how
>>> >> can I increase the speed?
>>> >> I think the problem is at line #1, #2, #3.
>>> >
>>> >> oarray = array.array("h", [0]*(len(larray)+len(rarray))) #1
>>> >
>>> > ITEMSIZE = 2
>>> > size = ITEMSIZE*(len(larray) + len(rarray))
>>> > oarray = array.array("h")
>>> > oarray.fromstring("\0" * size)
>>> >
>>> > may be a bit faster.
>>>
>>> Confirmed:
>>>
>>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
>>> array("h"); a.fromstring("\0"*(2*N))'
>>> 100 loops, best of 3: 9.68 msec per loop
>>> $ python2.5 -m timeit -s'from array import array; N = 10**6' 'a =
>>> array("h",
>>> [0]*N);'
>>> 10 loops, best of 3: 199 msec per loop
>> 
>> Funny thing is that using huge temporary string is faster that
>> multiplying small array:
>> 
>> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
>> =array('h'); a.fromstring('\0'*(2*N))"
>> 100 loops, best of 3: 9.57 msec per loop
>> 
>> C:\Python25>python -m timeit -s"from array import array; N = 10**6" "a
>> = array('h','\0\0'); a*N"
>> 10 loops, best of 3: 28.4 msec per loop
>> 
>> Perhaps if array multiplication was as smart as string multiplication
>> then array multiplication version would be the fastest.

Oops, I have to work on my reading skills. You're right, of course...

> That will not suffice:
> 
> $ python2.5 -m timeit -s'from array import array; from itertools import
> repeat; N = 10**6; init = [0]*N' 'array("h", init)'
> 10 loops, best of 3: 130 msec per loop
> 
> $ python2.5 -m timeit -s'from array import array; from itertools import
> repeat; N = 10**6; init = "\n"*(2*N)' 'array("h").fromstring(init)'
> 100 loops, best of 3: 5 msec per loop
> 
> A big chunk of the time is probably consumed by "casting" the list items.
> Perhaps an array.fill(value, repeat) method would be useful.

... and that could be spelled array.__mul__ as you suggest.

Peter



From Jeff.Demel at JavelinDirect.com  Tue Nov 21 16:10:32 2006
From: Jeff.Demel at JavelinDirect.com (Demel, Jeff)
Date: Tue, 21 Nov 2006 15:10:32 -0600
Subject: Psycopg2 | collapse row to string
Message-ID: <136ED738BD4F1545B97E4AC06FF6370734BFFC@DMSP-MSG-EVS01.mail.pvt>

I'm pulling some records from a database using psycopg2, then looping
through the rows to do some data checking and then writing the results
to a file if they pass some integrity checks.

Simple enough, but...

Is there an easy want to create a delimited string from this, for
example:

for row in rows:
    if checksomething == 100:
        newline = row[].combine("delimiter of some kind")
        resultfile.write(newline)

Obviously, the "row[].combine(delimeter)" is what I'm hoping exists.

TIA

-Jeff

This email is intended only for the individual or entity to which it is addressed.  This email may contain information that is privileged, confidential or otherwise protected from disclosure. Dissemination, distribution or copying of this e-mail or any attachments by anyone other than the intended recipient, or an employee or agent responsible for delivering the message to the intended recipient, is prohibited. If you are not the intended recipient of this message or the employee or agent responsible for delivery of this email to the intended recipient, please notify the sender by replying to this message and then delete it from your system.  Any use, dissemination, distribution, or reproduction of this message by unintended recipients is strictly prohibited and may be unlawful.


From vedran at v-programs.com  Thu Nov 30 12:35:18 2006
From: vedran at v-programs.com (Croteam)
Date: 30 Nov 2006 09:35:18 -0800
Subject: shtoom making PC2Phone calls
Message-ID: <1164908118.401178.201670@80g2000cwy.googlegroups.com>

Hello,

Can somebody give me shtoom examples or source code for making PC2Phone
calls and pc to pc
calls. (if you give me source code,please give me full url to that
source or send me to email:
   vedran at v-programs.com)

                           Thanks,I will really appreciate that



From steve at rueb.com  Thu Nov 30 10:38:21 2006
From: steve at rueb.com (Steve Bergman)
Date: 30 Nov 2006 07:38:21 -0800
Subject: why would anyone use python when java is there?
In-Reply-To: <1164874749.914101.32410@16g2000cwy.googlegroups.com>
References: <1164762232.220759.57160@h54g2000cwb.googlegroups.com>
	<1164764454.043697.125730@j72g2000cwa.googlegroups.com>
	<1164874749.914101.32410@16g2000cwy.googlegroups.com>
Message-ID: <1164901101.117456.89080@n67g2000cwd.googlegroups.com>

Bruce Eckel states the case pretty well in this interview:

http://www.artima.com/intv/aboutme.html

Bruce is the author of "Thinking In Java" and other excellent books,
but has migrated from the Java camp. (I'm excited to see him getting at
least a bit involved in TurboGears.  He has a lot to offer any project
in which he takes an interest.)

I find his opinions particularly relevant.

I've tried doing the Java thing, mainly because of the hype surrounding
it... and the marketability.  But I never got very far because I just
disliked the language. (Personal opinion.  But hey, this *is*
comp.lang.python!)



From timr at probo.com  Thu Nov 23 16:57:12 2006
From: timr at probo.com (Tim Roberts)
Date: Thu, 23 Nov 2006 21:57:12 GMT
Subject: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
References: <Xns9884782092A96toreriknpolarno@129.242.5.222>
Message-ID: <446cm2pusjhvnkr7515qeoh2p44aasdgjl@4ax.com>

Tor Erik Soenvisen <toreriks at hotmail.com> wrote:
>
>(len(['']) is 1) == (len(['']) == 1) => True
>
>Is this the case for all numbers? I've tried running the following:
>
>for i in range(10000):
>    	for j in range(10000):
>		if i != j:
>			assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
>(i))
>
>which executes fine. Hence, 0-9999 is okey... But this is a relatively 
>small range, and sooner or later you probably get two numbers with the same 
>id... Thoughts anyone?

It has been my experience that virtually every use of the "is" operator
(except "is None") is wrong.

Now, I fully understand that there are perfectly valid uses for "is", and
the standard library contains a few, but for the non-guru casual Python
programmer, I think it is safe to say "never use 'is'".
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From no-spam at no-spam-no-spam.invalid  Tue Nov 28 05:51:34 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Tue, 28 Nov 2006 11:51:34 +0100
Subject: HTML Table-of-Content Extraction Script
Message-ID: <ekh4bn$782$1@news.albasani.net>

I'm looking for a function which extracts a table of contents of HTML file(s) from <Hx....><a name=...></a>...</Hx> and possibly auto-creates the ancors.
Maybe something already exists?


Robert


From aahz at pythoncraft.com  Thu Nov 23 10:21:27 2006
From: aahz at pythoncraft.com (Aahz)
Date: 23 Nov 2006 07:21:27 -0800
Subject: Trying to understand Python objects
References: <1164150237.709846.38790@e3g2000cwe.googlegroups.com>
	<45643a6f$0$7761$426a74cc@news.free.fr>
	<1164206156.302934.183510@b28g2000cwb.googlegroups.com>
Message-ID: <ek4e9n$htt$1@panix3.panix.com>

In article <1164206156.302934.183510 at b28g2000cwb.googlegroups.com>,
walterbyrd <walterbyrd at iname.com> wrote:
>
>Is there some book, or other reference, that explains of this? I was
>thinking about "Python for Dummies." The "Think like a Computer
>Scientist" book, and "Dive into Python" book don't seem to explain
>Python's object model clearly enough for me.

Speaking as the co-author of _Python for Dummies_, we certainly tried to
make much of this clear, but I haven't seen any reviews yet (partly our
fault for not getting out review copies).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 1993


From steve at REMOVEME.cybersource.com.au  Wed Nov 15 02:57:39 2006
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 15 Nov 2006 18:57:39 +1100
Subject: refactoring so that multiple changes can be made with one
	variable?
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
Message-ID: <pan.2006.11.15.07.57.38.519433@REMOVEME.cybersource.com.au>

On Tue, 14 Nov 2006 10:41:53 -0500, John Salerno wrote:

> My code is below. For now I'm focusing on the lines where health (and 
> armor) are increased in each character class. Let's say I decided to 
> change the amount of increase in the future. As it is now, I'd have to 
> go to each character class and change the number so that each is still 
> in a good relation to the other (right now: 3, 2, 1; later: perhaps 4, 
> 3, 2, 1, if I added a new class -- i.e., change Fighter from 3 to 4, 
> Thief from 2 to 3, in other words increase them all by 1). So instead of 
> changing each one, is there a simple, clean way of just changing a 
> single number so that this change is reflected in all classes? Hope that 
> makes sense.

Cutting your code down to the minimum that exhibits the behaviour you want:

class Character(object):
    def __init__(self, name, strength, dexterity, intelligence):
        self.name = name
        self.health = 10
        # and so on...
        self.adjust_attributes()
    def adjust_attributes(self):
        pass


class Fighter(Character):
    def adjust_attributes(self):
        self.health += 3

class Thief(Character):
    def adjust_attributes(self):
        self.health += 2

etc.

Sounds like you want some sort of factory function that returns a class:

# WARNING: untested
def make_character_class(name, adjustments):
    class klass(Character):
        _adjustments = {}
        def adjust_attributes(self):
            for key, value in self._adjustments.items():
                x = getattr(self, key)
                setattr(self, key, x + item)
 
    setattr(klass, klass.__name__, name)
    setattr(klass, klass._adjustments, adjustments)
    return klass


And now you use it like this:

Fighter = make_character_class('Fighter', {'health': 3})
Thief = make_character_class('Thief', {'health': 2})

Now you can easily change the adjustments, all in just a few lines.

Here's another idea:

character_adjustments = { 'Fighter': {'health': 3}, 
    'Thief': {'health': 2}, 
    'Mage': {'intelligence': 3, 'strength': -1}
    }

and change the make_character_class factory function above to only take a
single argument, name. Now if you decide you want to *programmatically*
adjust the adjustments, you can do this:

# still untested...
for key in character_adjustments:
    for attribute, value in key.items():
        # adjust the values to make up for my poor choices
        character_adjustments[key][attribute] = value + 1

(but of course you must do this BEFORE creating your character classes!)


And last but most certainly not least, you can separate the adjustment
values into (say) an INI file, read them in at run-time and pass those
values to the factory function above. Then write another function which
walks through the INI file, adjusting the values in place as needed. This
is obviously going to take the most work, so I strongly suggest you don't
go down this path unless you really have to.


-- 
Steven D'Aprano 



From bbands at gmail.com  Thu Nov 30 14:58:24 2006
From: bbands at gmail.com (BBands)
Date: 30 Nov 2006 11:58:24 -0800
Subject: DDE (eSignal)
In-Reply-To: <mailman.894.1164914521.32031.python-list@python.org>
References: <1164912970.711046.214060@80g2000cwy.googlegroups.com>
	<mailman.894.1164914521.32031.python-list@python.org>
Message-ID: <1164916703.978005.63070@l12g2000cwl.googlegroups.com>

Thomas Heller wrote:
> Looks like a bug, either in the dde module or the dde server.
> But it's easy to find a workaround:
>
'1402.670000000000\x00\x12\x00*\x00\x00\x004\xfb\x12\x00\xfd\x1a\xd9w4\xc1\x00'.split("\0")[0]
> '1402.670000000000'

float(last.split("\0")[0]) works for me.

Thanks for that!

    jab



From robin at alldunn.com  Wed Nov  8 02:59:14 2006
From: robin at alldunn.com (Robin Dunn)
Date: Tue, 07 Nov 2006 23:59:14 -0800
Subject: ANN: wxPython 2.7.2.0
Message-ID: <45518E52.4010306@alldunn.com>

Announcing
----------

The 2.7.2.0 release of wxPython is now available for download at
http://wxpython.org/download.php.  This is expected to be the last
stepping stone in the path to the next stable release series,
2.8.x. We're pushing full speed ahead in order to get 2.8.0 included
with OSX 10.5, and so far we are very close to being on schedule. This
release has some house-keeping style changes, as well as some
user-contributed patches and also the usual crop of bug fixes.  Source
and binaries are available for both Python 2.4 and 2.5 for Windows and
Mac, as well some pacakges for varous Linux distributions.  A summary
of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform.


Changes in 2.7.2.0
------------------

Patch [ 1583183 ] Fixes printing/print preview inconsistencies

Add events API to wxHtmlWindow (patch #1504493 by Francesco Montorsi)

Added wxTB_RIGHT style for right-aligned toolbars (Igor Korot)

Added New Zealand NZST and NZDT timezone support to wx.DateTime.

wx.Window.GetAdjustedBestSize is deprecated.  In every conceivable
scenario GetEffectiveMinSize is probably what you want to use instead.

wx.Image: Gained support for TGA image file format.

wx.aui: The classes in the wx.aui module have been renamed to be more
consistent with each other, and make it easier to recognize in the
docs and etc. that they belong together.

     FrameManager -->       AuiManager
     FrameManagerEvent -->  AuiManagerEvent
     PaneInfo -->           AuiPaneInfo
     FloatingPane -->       AuiFloatingPane
     DockArt -->            AuiDockArt
     TabArt -->             AuiTabArt
     AuiMultiNotebook -->   AuiNotebook
     AuiNotebookEvent -->   AuiNotebookEvent

wx.lib.customtreectrl: A patch from Frame Niessink which adds an
additional style (TR_AUTO_CHECK_PARENT) that (un)checks a parent when
all children are (un)checked.

wx.animate.AnimationCtrl fixed to display inactive bitmap at start
(patch 1590192)

Patch from Dj Gilcrease adding the FNB_HIDE_ON_SINGLE_TAB style flag
for wx.lib.flatnotebook.

wx.Window.GetBestFittingSize has been renamed to GetEffectiveMinSize.
SetBestFittingSize has been renamed to SetInitialSize, since it is
most often used only to set the initial (and minimal) size of a
widget.

The QuickTime backend for wx.media.MediaCtrl on MS Windows works
again.  Just pass szBackend=wx.media.MEDIABACKEND_QUICKTIME to the
constructor to use it instead of the default ActiveMovie backend,
(assuming the quicktime DLLs are available on the system.)

-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From mauriceling at acm.org  Wed Nov 15 17:41:19 2006
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 15 Nov 2006 22:41:19 GMT
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
Message-ID: <455b978c$1@news.unimelb.edu.au>

walterbyrd wrote:
> Some think it will.
> 
> Up untill now, Java has never been standard across different versions
> of Linux and Unix. Some think that is one reason that some developers
> have avoided Java in favor of Python. Now that Java has been GPL'd that
> might change.
> 
> IMO: it won't make much difference. But I don't really know.
> 

I'm hoping for a more optimistic outcome that this may open a 
possibility for tigher interoperability between java programs and python 
programs. That is, run java class files or java codes natively on python 
VM. Is this still a blue sky dream?

maurice


From arkanes at gmail.com  Mon Nov 27 13:53:24 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 27 Nov 2006 12:53:24 -0600
Subject: super() and type()
Message-ID: <4866bea60611271053s2875daaen5292c94cdd0ef04e@mail.gmail.com>

I see super documented, and in use, as below (from the Python documentation)

class C(B):
    def meth(self, arg):
        super(C, self).meth(arg)

I'd like to not write C all the time, so is there any problem with writing:

class C(B):
    def meth(self, arg):
        super(type(self), self).meth(arg)


This seems to work in practice but I don't see it used anywhere and
I'm worried what I might be missing.

This was especially brought to my attention because pylint flags the
second usage as invalid, and I'm not sure if it should be considered a
false positive or not.


From no-spam at no-spam-no-spam.invalid  Wed Nov 15 08:56:18 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 15 Nov 2006 14:56:18 +0100
Subject: numpy/scipy: error of correlation coefficient (clumpy data)
In-Reply-To: <1163373385.596233.102100@k70g2000cwa.googlegroups.com>
References: <ej4akj$vbe$1@news.albasani.net>
	<mailman.2114.1163286261.11739.python-list@python.org>
	<ej7cft$8de$1@news.albasani.net> <ej7hsu$gil$1@news.albasani.net>
	<1163351475.742836.311180@h48g2000cwc.googlegroups.com>
	<ej7plg$sa7$1@news.albasani.net>
	<1163373385.596233.102100@k70g2000cwa.googlegroups.com>
Message-ID: <ejf6a7$fno$1@news.albasani.net>

sturlamolden wrote:
> robert wrote:
> 
>>> t = r * sqrt( (n-2)/(1-r**2) )
> 
>> yet too lazy/practical for digging these things from there. You obviously got it - out of that, what would be a final estimate for an error range of r (n big) ?
>> that same "const. * (1-r**2)/sqrt(n)" which I found in that other document ?
> 
> I gave you th formula. Solve for r and you get the confidence interval.
> You will need to use the inverse cumulative Student t distribution.
> 
> Another quick-and-dirty solution is to use bootstrapping.
> 
> from numpy import mean, std, sum, sqrt, sort
> from numpy.random import randint
> 
> def bootstrap_correlation(x,y):
>    idx = randint(len(x),size=(1000,len(x)))
>    bx = x[idx] # reasmples x with replacement
>    by = y[idx] # resamples y with replacement
>    mx = mean(bx,1)
>    my = mean(by,1)
>    sx = std(bx,1)
>    sy = std(by,1)
>    r = sort(sum( (bx - mx.repeat(len(x),0).reshape(bx.shape)) *
>       (by - my.repeat(len(y),0).reshape(by.shape)), 1) /
> ((len(x)-1)*sx*sy))
>    #bootstrap confidence interval (NB! biased)
>    return (r[25],r[975])
> 
> 
>> My main concern is, how to respect the fact, that the (x,y) points may not distribute well along the regression line.
> 
> The bootstrap is "non-parametric" in the sense that it is distribution
> free.
 

thanks for the bootstrap tester. It confirms mainly the "r_stderr = (1-r**2)/sqrt(n)" formula. The assymetry of r (-1..+1) is less a problem.
Yet my main problem, how to respect clumpy distribution in the data points, is still the same.
In practice think of a situation where data out of an experiment has an unkown damping/filter (or whatever unkown data clumper) on it, thus lots of redundancy in effect. 
An extreme example is to just duplicate data:

>>> x ,y =[0.,0,0,0,1]*10 ,[0.,1,1,1,1]*10
>>> xx,yy=[0.,0,0,0,1]*100,[0.,1,1,1,1]*100
>>> correlation(x,y)
(0.25, 0.132582521472, 0.25, 0.75)
>>> correlation(xx,yy)
(0.25, 0.0419262745781, 0.25, 0.75)
>>> bootstrap_correlation(array(x),array(y))
(0.148447544378, 0.375391432338)
>>> bootstrap_correlation(array(xx),array(yy))
(0.215668822617, 0.285633303438)
>>> 

here the bootstrap test will as well tell us, that the confidence intervall narrows down by a factor ~sqrt(10) - just the same as if there would be 10-fold more of well distributed "new" data. Thus this kind of error estimation has no reasonable basis for data which is not very good.

The interesting task is probably this: to check for linear correlation but "weight clumping of data" somehow for the error estimation.
So far I can only think of kind of geometric density approach...

Or is there a commonly known straight forward approach/formula for this problem?
In this formula which I can remember weakly somehow - I think there were other basic sum terms like sum_xxy, sum_xyy,.. in it (which are not needed for the formula for r itself )


Robert


From cemerick at snowtide.com  Sat Nov 18 12:40:05 2006
From: cemerick at snowtide.com (Chas Emerick)
Date: Sat, 18 Nov 2006 12:40:05 -0500
Subject: lxml/ElementTree and .tail
In-Reply-To: <ejncck$9eg$1@sea.gmane.org>
References: <mailman.208.1163621095.32031.python-list@python.org>	<455C1887.6060602@web.de>	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>	<ejhdgm$gve$1@sea.gmane.org>	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>	<mailman.251.1163679925.32031.python-list@python.org>	<1163835505.102190.140060@b28g2000cwb.googlegroups.com>	<ejmm4d$guk$1@sea.gmane.org>
	<894503B9-B571-42E3-9FA0-B0C67D333A3D@snowtide.com>
	<ejncck$9eg$1@sea.gmane.org>
Message-ID: <E7DA9C0B-283D-408D-92EC-A05E747E945E@snowtide.com>


On Nov 18, 2006, at 11:29 AM, Fredrik Lundh wrote:

> Chas Emerick wrote:
>
>>> and keep patting our-
>>> selves on the back, while the rest of the world is busy routing  
>>> around
>>> us, switching to well-understood XML subsets or other serialization
>>> formats, simpler and more flexible data models, simpler API:s, and
>>> more robust code.  and Python ;-)
>>
>> That's flatly unrealistic.  If you'll remember, I'm not one of "those
>> people" that are specification-driven -- I hadn't even *heard* of
>> Infoset until earlier this week!
>
> The rant wasn't directed at you or anyone special, but I don't really
> think you got the point of it either.  Which is a bit strange, because
> it sounded like you *were* working on extracting information from  
> messy
> documents, so the "it's about the data, dammit" way of thinking
> shouldn't be news to you.

No, it's not any kind of news at all, and I'm very sympathetic to  
your specific perspective (and have advocated it in other contexts  
and circumstances, where appropriate).  And yes, we are in fact  
ensuring that we get from the HTML/XHTML/text/PDF/etc serialization  
we have to consume to a uniform, normalized, and "clean" data model  
in as few steps as possible.  However, in those few steps, we have to  
recognize the functional reality of how each data representation is  
used out in the world in order to translate it into a uniform model  
for our own purposes.  In concrete terms, that means that an end tag  
in an XHTML serialization means that that element is closed, done,  
finit.  Any other representation of that serialization doesn't  
correspond properly with the intent of that HTML document's author.

> And the routing around is not unrealistic, it's is a *fact*; JSON and
> POX are killing the full XML/Schema/SOAP stack for communication,  
> XHTML
> is pretty much dead as a wire format, people are apologizing in public
> for their use of SOAP, AJAX is quickly turning into AJAJ, few people
> care about the more obscure details of the XML 1.0 standard (when did
> you last see a conditional section? or even a DTD?), dealing with huge
> XML data sets is still extremely hard compared to just uploading the
> darn thing to a database and doing the crunching in SQL, and nobody  
> uses
> XML 1.1 for anything.
>
> Practicality beats purity, and the Internet routes around damage,  
> every
> single time.

I agree 100% -- but I would have thought that that's a point I would  
have made.  The model that ET uses seems like a "purified"  
representation of a mixed-content serialization, exactly because it  
is geared to an ideal rather than the practical realities of mixed  
content and expectations thereof.

For what it's worth, our current effort is directed towards providing  
significant stores/feeds of XML/PDF/HTML/text/etc in something that  
can be dropped into a RDBMS.  Perhaps that's the source of the  
impedance between us: you view Infoset as a functional replacement  
for serialization-dependent XML, whereas we are focussed on what  
could be broadly described as a translation from one to the other.

>> overwhelming majority of the developers out there care for nothing
>> but the serialization, simply because that's how one plays nicely
>> with others.
>
> The problem is if you only stare at the serialization, your code  
> *won't*
> play nicely with others.  At the serialization level, it's easy to  
> think
> that CDATA sections are different from other text, that character
> references are different from ordinary characters, that you should
> somehow be able to distinguish between <tag></tag> and <tag/>, that
> namespace prefixes are more important than the namespace URI, that an
> &nbsp; in an XHTML-style stream is different from a U+00A0  
> character in
> memory, and so on.  In my experience, serialization-only thinking (at
> the receiving end) is the single most common cause for  
> interoperability
> problems when it comes to general XML interchange.

I agree with all of that.  I would again refer to the pervasive view  
of what end tags mean -- that's what I was primarily referring to  
with the term 'serialization'.

> (By the way, did ET fail to *read* your XML documents?  I thought your
> complaint was that it didn't put the things it read in a place  
> where you
> expected them to be, and that you didn't have time to learn how to  
> deal
> with that because you had more important things to do, at the time?)

No, it doesn't put things in the right places, so I consider that a  
failure of the model.  I don't see why I should have spent time  
learning how to deal with that when another very comprehensive  
library is available that does meet expectations.  *shrug*

Further, the fact that ET/lxml works the way that it does makes me  
think that there may be some other landmines in the underlying model  
that we might not have discovered until some days, weeks, etc., had  
passed, so there's a much greater comfort level in working with a  
library that explicitly supports the model that we expect (and was  
assumed when the HTML [now XHTML] documents in question were authored).

- Chas


From carsten at uniqsys.com  Thu Nov 16 11:18:14 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 16 Nov 2006 11:18:14 -0500
Subject: Yield
In-Reply-To: <1163691173.737911.130410@i42g2000cwa.googlegroups.com>
References: <1163610839.649860.263850@f16g2000cwb.googlegroups.com>
	<455b4f9f$1@usenet01.boi.hp.com>
	<1163659530.752607.120880@m73g2000cwd.googlegroups.com>
	<455c15ca$1@news.eftel.com>
	<mailman.227.1163664079.32031.python-list@python.org>
	<455c1ddf@news.eftel.com>
	<1163691173.737911.130410@i42g2000cwa.googlegroups.com>
Message-ID: <1163693894.3380.14.camel@dot.uniqsys.com>

On Thu, 2006-11-16 at 07:32 -0800, Danny Colligan wrote:
> Carsten mentioned that generators are more memory-efficient to use when
> dealing with large numbers of objects. Is this the main advantage of
> using generators?  Also, in what other novel ways are generators used
> that are clearly superior to alternatives?

The memory efficiency is definitely a major advantage. Generators allow
you to efficiently produce, manipulate, and consume sequences of
arbitrary length. The length of the sequence could even be potentially
infinite, which is impossible to handle when you're working with actual
lists.

The memory efficiency aside, it's more elegant to write something like
this:

    def squares(n):
      for i in range(n):
        yield i**2

than something like this:

    def squares(n):
      result = []
      for i in range(n):
        result.append(i**2)
      return result

-Carsten




From michael at stroeder.com  Thu Nov 16 08:50:04 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Thu, 16 Nov 2006 14:50:04 +0100
Subject: python-ldap and Python 2.5
In-Reply-To: <4555132f$0$3586$9b622d9e@news.freenet.de> 
References: <mailman.2071.1163195374.11739.python-list@python.org>
	<4555132f$0$3586$9b622d9e@news.freenet.de> 
Message-ID: <ct6u24-95t.ln1@nb2.stroeder.com>

Michael Str?der wrote:
> 
> But this seems to help (tested on my local system):
> http://sourceforge.net/tracker/index.php?func=detail&aid=1575329&group_id=2072&atid=102072

Released python-ldap 2.2.1 yesterday which contains this fix.

Ciao, Michael.


From researchbase at gmail.com  Thu Nov 16 13:14:23 2006
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 16 Nov 2006 23:44:23 +0530
Subject: python and accessibility issues.
Message-ID: <f81479dd0611161014k2cd08ccbjd3432fcc3f288f42@mail.gmail.com>

this question is streight forward, short and sweet.
I am developing some applications and being blind myself, expect that
including me, all other blind people must be able to use it.
so my question is,
is wx python complying with Microsoft Active Accessibility or MSAA for short?
I will use wx python or any other gui library that is having support
for MSAA built in.
thanking all.
Krishnakant.


From fredrik at pythonware.com  Wed Nov 15 16:31:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 22:31:26 +0100
Subject: Python-2.5.exe?
In-Reply-To: <455b824d$0$7054$c3e8da3@news.astraweb.com>
References: <v8H6h.15$895.11@newsfe04.lga>	<mailman.198.1163608644.32031.python-list@python.org>
	<455b824d$0$7054$c3e8da3@news.astraweb.com>
Message-ID: <ejg0v6$mfn$1@sea.gmane.org>

John Salerno wrote:

>> python doesn't depend on the registry settings for normal use, so
>> you can simply install python as usual, copy python25.dll from 
>> c:\windows\system32 to c:\python25, and then copy (or move) the
>> entire c:\python25 tree to your USB drive.
> 
> Is it safe to assume that if you do this, Python first looks in 
> C:\Python25 for the dll file, before trying to find the non-existent (on 
> the USB drive) C:\Windows\System32?

Python looks for a DLL in the same directory as the EXE before it looks 
anywhere else (this is standard Windows behaviour).

</F>



From python.list at tim.thechases.com  Tue Nov 28 06:18:18 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Tue, 28 Nov 2006 05:18:18 -0600
Subject: Modifying every alternate element of a sequence
In-Reply-To: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
References: <1164710289.544394.101170@h54g2000cwb.googlegroups.com>
Message-ID: <456C1AFA.7010304@tim.thechases.com>

> I have a list of numbers and I want to build another list with every
> second element multiplied by -1.
> 
> input = [1,2,3,4,5,6]
> wanted = [1,-2,3,-4,5,-6]
> 
> I can implement it like this:
> 
> input = range(3,12)
> wanted = []
> for (i,v) in enumerate(input):
>     if i%2 == 0:
>         wanted.append(v)
>     else:
>         wanted.append(-v)

 >>> input = range(3,12)
 >>> [i%2==0 and v or -v for (i,v) in enumerate(input)]
[3, -4, 5, -6, 7, -8, 9, -10, 11]

 > But is there any other better way to do this.

I'm not sure densely packing it into a list comprehension is 
necessarily a *better* way, just a more compact way.

To make more sense of it, you might create a helper function that 
does your comparison work:

	def inv_if(v, test):
		if test:
			return v
		else:
			return -v

	[inv_if(v, i%2==0) for (i,v) in enumerate(input)]


Or you could even do something like

	def inv_alternating(t):
		i, v = t
		if i%2==0:
			return v
		else:
			return -v

	[inv_alternating(t) for t in enumerate(input)]

Either compacts it for the actual call within a list 
comprehension, but it is cleaner to read what's going on.

-tkc







From antoine at vo.lu  Wed Nov  8 06:49:23 2006
From: antoine at vo.lu (Antoine De Groote)
Date: Wed, 08 Nov 2006 12:49:23 +0100
Subject: for x in... x remains global
Message-ID: <dfc90$4551c444$544abc47$21060@news.hispeed.ch>

for x in range(3): pass

After this statement is executed x is global variable. This seems very 
unnatural to me and caused me 3 three days of debugging because I was 
unintentionally using x further down in my program (typo). I would have 
thought that variables like this are local to the for block.

Is there a reason this is not the case? Maybe there are PEPs or 
something else about the matter that you can point me to?

Regards,
antoine


From spedrosa at gmail.com  Mon Nov 13 15:27:42 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 13 Nov 2006 12:27:42 -0800
Subject: Is python for me?
References: <1163437873.721254.31070@b28g2000cwb.googlegroups.com>
	<mbmm24-48f.ln1@lairds.us>
	<1163441468.081643.189600@f16g2000cwb.googlegroups.com>
	<1163448523.712403.232970@i42g2000cwa.googlegroups.com>
Message-ID: <1163449662.186813.52000@k70g2000cwa.googlegroups.com>


Not to be picky, but any slowness in software is rarely because of code
size. Rather, it is the data size and algorithms that play the major
role. Only after you got the first two right is that you should worry
about implementation speed.

That said, you are correct. Only if you intend to do *heavy* processing
of the returned data, your major bottleneck should be the database.

*If* you find Python to be slow(for some specific operation, never for
a whole application), you could always rewrite that section using
another language (C/C++ come to mind), or call external libraries to do
the heavy-lifting. The easy integration between Python and C (compared
to a couple other popular platforms) is what drove me to Python.

Make it work first. Then optimize. And Python helps both.


Stephen

lennart escreveu:

> dakman at gmail.com schreef:
>
> > As stated above python is capable of all those things, however on
> > larger applications like that it can tend to slow down a bit. And the
> > executables do need a little bit of work, because it's bassicly a dll
> > and a library of all your .pyc files. However python is still a great
> > language and I would recomend it. And most of these things will
> > probably be fixed in Python 3000!
> >>
> >> <<snip>>
> > > Python very quickly.
>
> Can you define 'large'? Is that large in code, or large in database? I
> don't know which database is supported. If its a external db, like
> MySql, the query is performed through the software of MySql, am I
> right? If I'm correct, the 'slowness' comes from the amount of code in
> python itself, not from the database.



From tleeuwenburg at gmail.com  Sun Nov 26 17:51:10 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 26 Nov 2006 14:51:10 -0800
Subject: The Python Papers License Discussion
Message-ID: <1164581470.701666.158880@45g2000cws.googlegroups.com>

Thank you all who have commented on the licensing issues surrounding
The Python Papers.

For the time being, the board and I have decided to continue using the
Creative Commons Noncommercial, Attribution and Share-Alike license as
the standard license for articles contained in The Python Papers.
However, a number of reasonable concerns have been raised by
individuals on this forum, the most important I consider to be:
  * Incompatibility with the Python license, preventing content in The
Python Papers from being fed back and redistributed, e.g., with the
Python documentation
  * Possible confusion arising from the slogan "free as in freedom"

On that basis, I would like to make two announcements:

  1) Authors submitting to The Python Papers will be permitted to
choose from a number of licenses for redistributing their work. (note
-- their copyright agreement with The Python Papers is *separate* from
the copyright agreement they choose to attach for general use). This
will allow authors to choose greater freedoms to the re-use of their
works if they wish.
  2) The Python Papers will no longer use the slogin "free as in
freedom" but will adopt the Creative Commons slogan "some rights
reserved" in future communications, to the extent possible under human
fallibility :)

Those who have made comments here might wish to submit them for
publication if they would like them to be heard by The Python Papers
general readership. This may be done by emailing
submissions at pythonpapers.org. We may not publish all submitted
comments, and reserve the right to publish them under the license
adopted by The Python Papers generally.



From bj_666 at gmx.net  Sun Nov 26 07:24:21 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 26 Nov 2006 13:24:21 +0100
Subject: Persistent Threads & Synchronisation
References: <ekbtta$753$1@news.freedom2surf.net>
Message-ID: <pan.2006.11.26.12.24.20.464034@gmx.net>

In <ekbtta$753$1 at news.freedom2surf.net>, Matthew Tylee Atkinson wrote:

> They way I want it to work is this:  The downloading thread, when
> spawned, stays alive for the duration of the program.  Occasionally the
> main program will call a function in it to download the data and save it
> as files on disk.  Then, these files are loaded by the main thread.
> When this has happened, the main thread calls another function in the
> download thread to delete the temporary files.  The same thing happens
> next time a download is needed, when the user is looking at some other
> content.
> 
> My problem is this: the downloading thread only seems to execute code
> in a separate thread as long as the run() function (called by the
> start() function) is running.  This is as per the documentation, of
> course.  I am performing the download in the run() function, but the
> file cleanup is still done with a separate call.  This actually does
> work, after the download is over, and run() has terminated, but I
> believe it isn't happening in a separate thread anymore (as previously I
> made a mistake and called run() directly, instead of start() and it
> blocked the main program).

There seems to be a misunderstanding of threads.  You don't call functions
in a thread from the main program.  If you call a function from the main
thread then the function is executed in the main thread.  That's true for
any call on `Thread` objects except for `start()` which really starts
executing the `run()` method in a separate thread.

The easiest way for safe communication with threads is a `Queue` like
the one in the `Queue` module.  If you want a download thread that
is running alongside the main program all the time then write a while loop
that gets "commands" via a queue.  Something like:

    def run(self):
        while True:
            command = self.queue.get()
            if command == 'exit':
                break
            # ...

    def exit(self):
        self.queue.put('exit')

    # ...

Of course the `command` objects can be more complex than strings to hold
arguments for the worker thread.

> I did wonder about using a Condition, but that seems to be more suited
> for synchronising between threads, which isn't really the issue here
> (and thus it seems like overkill for solving the problem of replacing
> that loop with something more efficient, though could be a possibility,
> I suppose).

But that problem *is* about thread synchronization.

Ciao,
	Marc 'BlackJack' Rintsch


From robert.kern at gmail.com  Tue Nov 21 17:41:03 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Nov 2006 16:41:03 -0600
Subject: Is there a list comprehension for this?
In-Reply-To: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
References: <1164143944.874745.19470@f16g2000cwb.googlegroups.com>
Message-ID: <ejvvaf$b56$1@sea.gmane.org>

liam_herron wrote:
> Given:
> dw = [ 1, -1.1, +1.2 ]
> 
> Suppose I want to create a list 'w' that is defined as
> 
> w[0] = dw[0],
> w[1] = w[0] + dw[1],
> w[2] = w[1] + dw[2]
> 
> Is there a list comprehension or map expression to do it in one or 2
> lines.

One way is to use numpy (numpy.scipy.org):


In [40]: from numpy import cumsum

In [41]: dw = [1, -1.1, +1.2]

In [42]: cumsum(dw)
Out[42]: array([ 1. , -0.1,  1.1])


If you're doing a lot of numerical computing, you'll probably want a number of
other things that numpy provides.

-- 
Robert Kern

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



From deets at nospam.web.de  Thu Nov 16 11:29:46 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Nov 2006 17:29:46 +0100
Subject: Secure Python
References: <mailman.219.1163646863.32031.python-list@python.org>
	<pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au>
	<455c1665@quokka.wn.com.au>
	<pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au>
	<455c4d9b@quokka.wn.com.au> <4s38t9Ftln2aU1@mid.uni-berlin.de>
	<1163689149.613418.40020@b28g2000cwb.googlegroups.com>
Message-ID: <4s3hvqFtih71U1@mid.uni-berlin.de>

> A significant issue is the architecture of the server itself. Is a
> per-process solution acceptable or must everything happen in the same
> process with lots of threads (or microthreads)? Of course, there are
> games using lots of microthreads, although I'm not sure whether they
> also use lots of processes, too, and it has been asserted that having
> lots of operating system threads or processes is just too resource
> intensive, but I think it's especially worth considering the nature of
> the platform you're using and what it offers.

AFAIK most engines today are only single-threaded. A big grief for all those
dual-core owners out there.

And having thousands of players is common - spawning a process for each of
them certainly too resource-consuming. 

AFAIK stackless python was initially financially supported by a
game-company. So I guess that shows us pretty much what games (at least)
are after: low-profile in-process threads, fine-grained controllable.

Diez


From fredrik at pythonware.com  Tue Nov 21 01:50:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Nov 2006 07:50:39 +0100
Subject: move up a level
In-Reply-To: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
References: <1164089267.967125.190860@m73g2000cwd.googlegroups.com>
Message-ID: <eju7k0$2r0$1@sea.gmane.org>

rplobue at yahoo.com wrote:

> alright, noob question: i want to open a file in a directory above the
> current one i'm in.  I'm trying to use myfile =
> open('../thefileiwant.txt', 'r')  but the ../ doesn't work.

that's how it's usually done.  what does "doesn't work" mean in this case?

</F>



From g.brandl-nospam at gmx.net  Thu Nov 16 12:17:48 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 16 Nov 2006 18:17:48 +0100
Subject: atexit.register does not return the registered function. IMHO,
	it should.
In-Reply-To: <mailman.267.1163693346.32031.python-list@python.org>
References: <1163693028.543926.163320@f16g2000cwb.googlegroups.com>
	<mailman.267.1163693346.32031.python-list@python.org>
Message-ID: <eji6fs$t29$1@news.albasani.net>

Skip Montanaro schrieb:
>> Since that the decorator syntax is upon us, I think it would be good if
>> atexit.register() was returning the function passed as argument.  This
>> simple change to the library would solve a problem with the use of
>> atexit.register as a decorator (and I can't think of any use case where
>> this change would break any code).
> ...
> 
> Can you submit a bug report to the SourceForge bug tracker?  I'll take
> care of the problem when I have access to the subversion repository.

Sorry, didn't read this thread before the bug report, which is why I
already handled this one ;)

cheers,
Georg


From blah at blahdeblah  Thu Nov 30 02:58:48 2006
From: blah at blahdeblah (bill ramsay)
Date: Thu, 30 Nov 2006 20:58:48 +1300
Subject: detecting that a SQL db is running
Message-ID: <783tm2dmb6brnptr91hsfnc1t38u1utbi8@4ax.com>

Hi

I wonder if anyone can help me with a problem that I have with MSDE
SQL db.  [I am changing to SQL server soon].

I have an app that runs on a server that communicates with remote
devices using email, this and other similar servers then sends
XML/SOAP messages to a master application.

I am in the process of intercepting these XML messages and forwarding
them on to a service managment platform for notification alerts etc.
This app reads a SQL db to get some additional information which is
also included in the XML message.

 the problem is that the app on the comms server  is an aggregate of
modules, that has a tendency to lock up,  the server still runs,  but
it causes the SQL server to stop.  This is being worked on by the
developers, i expect that it will take some time to resolve.  

using ASR we just reboot the server when this happens.

Using simple SQL statements,  i am able to detect when SQL is up and
running,  and to detect when it has stopped.

Is there a simple way to detect if the SQL server has actually
started?

i had a look at investigating the registry,  but to be honest,  from
the various recipes that i have seen,  i haven't a clue what I am
looking at,

any advice?

any information shall be gratefully received 

kind regards

Bill



From hardcoded.software at gmail.com  Mon Nov 20 07:15:14 2006
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 20 Nov 2006 04:15:14 -0800
Subject: to ask an container instance to suicide
In-Reply-To: <1164015742.696913.283050@m73g2000cwd.googlegroups.com>
References: <1164015742.696913.283050@m73g2000cwd.googlegroups.com>
Message-ID: <1164024914.819226.14840@m7g2000cwm.googlegroups.com>

jm.suresh at no.spam.gmail.com wrote:
> Hi,
>  I have containers to hold geometrical objects. The members in these
> containers can again be containers them self. Now, In the program I
> would be moving objects from one container to another. In this process,
> If the number of members in one of the containers becomes just one, I
> want to delete that container and have only its only member in place of
> it in the parent container.
>  I have implemented setting and getting the container members using
> property().
>
> Right now, I am planning to do this this way:
>  Maintain a reference to parent container in each container.
>  When the condition is detected, do self.parent.deleteObject(self) .
>
> def deleteObject(self,memberId):
>    index = self._members.index(memberId)
>    self._members[index] = memberId._members[0]
>    del memberId
>
> Will this work. Or is there any other simple way to do this?
> --
> Suresh

I don't understand what you want to achieve, but there are 2 things I
can say: "del memberId" is useless, it is deleted anyway when memberId
goes out of scope. Because you have a 2-way reference, have one of them
(the parent reference would be better) a weakref. Else, you'll be
leaking memory.



From ndbecker2 at gmail.com  Sun Nov 12 08:24:48 2006
From: ndbecker2 at gmail.com (Neal Becker)
Date: Sun, 12 Nov 2006 08:24:48 -0500
Subject: Find interface associated with default route?
References: <ej6vr6$17a$1@sea.gmane.org> <ej705n$2n9$1@sea.gmane.org>
	<ej72eg$7hr$1@sea.gmane.org>
Message-ID: <ej77as$kjb$1@sea.gmane.org>

Neal Becker wrote:

> Fredrik Lundh wrote:
> 
>> Neal Becker wrote:
>> 
>>> Any thoughts on howto find the interface associated with the default
>>> route (this is on linux)?
>> 
>> are you sure you sent this to the right newsgroup ?
>> 
>> is this what you want ?
>> 
>>  >>> import os
>>  >>> for line in os.popen("/sbin/route"):
>> ...     line = line.split()
>> ...     if line[0] == "default":
>> ...             print line[-1]
>> ...
>> eth0
>> 
> 
> Well, I was hoping for something more 'elegant' - meaning relying on
> library
> calls rather than calling programs.  Obviously, /sbin/route has some
> library calls to obtain this info, and maybe python has a wrapper for it.
> 
> Yes, this is the right group - I want a python solution.
> 

A quick strace reveals that 'route' just reads /proc/net/route, so:

def get_default_if():
    f = open ('/proc/net/route', 'r')
    for line in f:
        words = string.split (line)
        dest = words[1]
        try:
            if (int (dest) == 0):
                interf = words[0]
                break
        except ValueError:
            pass
    return interf




From g.brandl-nospam at gmx.net  Wed Nov  8 15:24:36 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 08 Nov 2006 21:24:36 +0100
Subject: Is there a commas-in-between idiom?
In-Reply-To: <slrnel39n2.9hk.news@datatailors.xs4all.nl>
References: <eiklvo$5uj$1@hefestos.uned.es>
	<mailman.1809.1162822572.11739.python-list@python.org>
	<slrnel39n2.9hk.news@datatailors.xs4all.nl>
Message-ID: <eitee4$dut$1@news.albasani.net>

Peter van Kampen schrieb:
> On 2006-11-06, Fredrik Lundh <fredrik at pythonware.com> wrote:
>> I've collected a bunch of list pydioms and other notes here:
>>
>>     http://effbot.org/zone/python-list.htm
> 
> """
> A = B = [] # both names will point to the same list
> """
> 
> I've been bitten by this once or twice in the past, but I have always
> wondered what it was useful for? Can anybody enlighten me?

Do you never have a situation where you want to assign the same value
to two variables?

Or are you objecting to the fact that both names point to the same object?
It couldn't be otherwise. Consider:

X = []
A = B = X

What should this do? Copy "X" and assign one copy to A, one to B?

Georg


From bmichel at gmail.com  Wed Nov 22 08:00:32 2006
From: bmichel at gmail.com (bmichel at gmail.com)
Date: 22 Nov 2006 05:00:32 -0800
Subject: XML Validation in Python using XSV
Message-ID: <1164200431.878328.175100@f16g2000cwb.googlegroups.com>

I'd like to use XSV for validating an XML file in Python.
I am working on Linux Debian platform.
I'm not sure how to install XSV and how to configure it. My goal is to
be able to import the XSV library in Python and be able to use it's
functions.

XSV v2.10 for Debian available here:
ftp://ftp.cogsci.ed.ac.uk/pub/XSV/XSV_2.10-1_all.deb

How do i do that?



From sjmachin at lexicon.net  Fri Nov 17 05:53:01 2006
From: sjmachin at lexicon.net (John Machin)
Date: 17 Nov 2006 02:53:01 -0800
Subject: Bitwise operators. Differences from javascript and PHP.
In-Reply-To: <mailman.328.1163759929.32031.python-list@python.org>
References: <1163756475.924108.202060@h48g2000cwc.googlegroups.com>
	<1163758737.890309.21950@e3g2000cwe.googlegroups.com>
	<mailman.328.1163759929.32031.python-list@python.org>
Message-ID: <1163760781.357871.78220@k70g2000cwa.googlegroups.com>



On Nov 17, 9:38 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> John Machin wrote:
> >http://theopensourcery.com/phplogic.htm
>
> > "In effect the bitwise operations [words "can be" omitted, I presume]"can only be", more likely.

Yes, probably.

>
> > safely applied to integer variables - their effect on booleans,
> > float/double or string variables can be predicted but are not really
> > useful" ???sounds like we're in
>
>  >>> v = float(4653896912)
>  >>> from string import pack, unpack

from struct, more likely?

>  >>> o = unpack("i", pack("d", v)[:4])[0]
>  >>> (-o>>(13-3))|-2<<(32-13-1)
> -212992
>
> territory.
>

Sounds like you could be correct. However it's possible that you have
aided and abetted the OP to perpetrate a nonsense :-)

Cheers,
John



From martin.witte at gmail.com  Fri Nov 17 02:51:08 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 16 Nov 2006 23:51:08 -0800
Subject: problem with defining a global class instance
In-Reply-To: <mailman.313.1163748145.32031.python-list@python.org>
References: <mailman.313.1163748145.32031.python-list@python.org>
Message-ID: <1163749868.058194.71000@b28g2000cwb.googlegroups.com>


sharath B N wrote:
> hi,
> i am sort of newbie to python. I am trying to do a super Market
> simulation with OOP in python. I have problems with using a class
> instance as global...
> def generate (... ,....,...)
>
> " in this function i define the global variables "
> global  stock,stockManager, manager etc.
>
>
> class Manager
> ...
> ...
> ...
> def  create_stockManager(..)
> """ this is a method in class manager"""
> stockManager = StockManager( name)
> stockManager.create_Stock(..)
>
>
> now this gives an attribute error sayin .... stockManager has no
> attribute create_Stock
>
> if i create the StockManager instance in the generate func
> itself...then this problem doesnt come....but i need it this way for
> the program to make sense..
> can somebody help me
> thnks
> Sharath

Python uses the concept of namespaces, the keyword 'global' binds a
local variable to the global namespace, take as example:

# this amount is in the global namespace
amount = 98

def get_amount_local():
    # this amount is local in this function
    amount = 23
    return amount

def get_amount_global():
    # this global is taken from the gloabl namespace
    global amount
    return amount

print get_amount_local() # so this will print 23
print get_amount_global() # so this will print 98

see  http://docs.python.org/ref/assignment.html



From Fredrik.Kant at tradetech.se  Thu Nov 23 12:44:37 2006
From: Fredrik.Kant at tradetech.se (Kant, Fredrik)
Date: Thu, 23 Nov 2006 17:44:37 -0000
Subject: javadoc equivalent?
Message-ID: <89ECB4622A5FC84ABC9BFBD2F0488DC438F91C@stockholm.ttg.local>

Hi!

I saw this question, have you tried the standard python module pydoc
(you find it under Lib in the standard installation)?

 

Fredrik Kant

Phone: +46 (8) 4100 9795
Mobile: +46 (733) 38 50 42
Email: fredrik.kant at tradetech.se <mailto:fredrik.kant at tradetech.se>  

TradeTech
Sturegatan 46
SE-114 36 Stockholm, SWEDEN
www.tradetech.se <http://www.tradetech.se/>  

    
Confidentiality Notice
The content of this e-mail message is intended only for the confidential
use of the person(s) to whom it is addressed above. If the reader of
this message is not the designated person to whom it is addressed, you
are hereby notified that you have received this communication in error
and that reading it, copying it, or in any way disseminating its content
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From pavlovevidence at gmail.com  Fri Nov 24 09:39:54 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 24 Nov 2006 06:39:54 -0800
Subject: How do I access a main frunction from an import module?
In-Reply-To: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
References: <1164377547.562483.152770@l12g2000cwl.googlegroups.com>
Message-ID: <1164379194.770281.315460@j72g2000cwa.googlegroups.com>


Jim wrote:
> I have created an import module.  And would like to access a function
> from the main script, e.g.,
>
> file abc.py:
> ###################
> def a():
>     m()
>     return None
> ####################
>
> file main.py:
> #####################
> from abc import *
> def m():
>     print 'something'
>     return None
>
> a()
> ######################


You can do it with "from __main__ import m" atop abc.py (the module
invoked at the command line is always called __main__).

However, I *highly* suggest you put m in another file.  Importing
variables from __main__ would make your program incompatible with many
useful tools.  For example, if you invoke the Python profiler on your
code, like this:

    python -m profile main.py

it will break your code, because __main__ no longer refers to main.py
but to profile.py (from the Python library).  Importing from __main__
adversely affects tools such as PyChecker and PyLint.

The exception to this would be if abc.py is specifically designed as a
utility for interactive use; then it would be ok and useful.


Carl Banks



From tleeuwenburg at gmail.com  Thu Nov 30 23:14:43 2006
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 30 Nov 2006 20:14:43 -0800
Subject: Open and closing files
In-Reply-To: <1164942954.646364.143010@h54g2000cwb.googlegroups.com>
References: <mailman.910.1164940276.32031.python-list@python.org>
	<1164942954.646364.143010@h54g2000cwb.googlegroups.com>
Message-ID: <1164946483.219843.47740@f1g2000cwa.googlegroups.com>


John Machin wrote:
> Thomas Ploch wrote:
> > Is it defined behaviour that all files get implicitly closed when not
> > assigning them?
> >
> > Like:
> >
> > def writeFile(fName, foo):
> > 	open(fName, 'w').write(process(foo))
> >
> > compared to:
> >
> >
> > def writeFile(fName, foo):
> > 	fileobj = open(fName, 'w')
> > 	fileobj.write(process(foo))
> > 	fileobj.close()
> >
> > Which one is the 'official' recommended way?
>
> No such thing as an 'official' way.
>
> Nothing happens until the file object is garbage-collected. GC is
> generally not under your control.
>
> Common sense suggests that
> (a) when you are reading multiple files, you close each one explicitly
> (b) when you are writing a file, you close it explicitly as soon as you
> are done with it. That way you can trap any error condition and do
> something moderately sensible -- better than getting an error condition
> during GC when your Python process is shutting down.
>
> HTH,
> John

Not to mention you can get bitten on the ass by a few characters
sitting in a buffer someplace when you expect your file to have been
fully written.

Close the thing.

Cheers,
-T



From dannycolligan at gmail.com  Tue Nov 21 12:48:56 2006
From: dannycolligan at gmail.com (Danny Colligan)
Date: 21 Nov 2006 09:48:56 -0800
Subject: Vim scripts for editing Python?
In-Reply-To: <1164127733.241526.126200@m7g2000cwm.googlegroups.com>
References: <1164086261.774376.125490@j44g2000cwa.googlegroups.com>
	<1164127733.241526.126200@m7g2000cwm.googlegroups.com>
Message-ID: <1164131336.302547.222060@k70g2000cwa.googlegroups.com>



On Nov 21, 11:48 am, "Danny Colligan" <dannycolli... at gmail.com> wrote:
> Rainy wrote:
> > Hi, did anyone make a good set of scripts for editing Python in Vim? I
> > know there is one on vim.org but it isn't very advanced. thx..Here's what google has to say about it:http://www.google.com/search?hl=en&q=site%3Ahttp%3A%2F%2Fwww.vim.org%...http://www.google.com/search?hl=en&lr=&safe=off&q=site%3Ahttp%3A%2F%2...
>
> Danny

Almost forgot... if you do some searching around on comp.editors for
vim and python:

http://groups-beta.google.com/group/comp.editors/search?group=comp.editors&q=vim+python&qt_g=Search+this+group

You'll find some helpful threads such as this one:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/7678e4269a806476/c65a6a9ed84e0eb2?lnk=gst&q=python&rnum=5#c65a6a9ed84e0eb2

Danny



From pavlovevidence at gmail.com  Mon Nov 13 19:22:03 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Nov 2006 16:22:03 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
In-Reply-To: <1163430016.542861.130100@b28g2000cwb.googlegroups.com>
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<mailman.38.1163402844.32031.python-list@python.org>
	<1163408380.747399.18750@h54g2000cwb.googlegroups.com>
	<1163417909.768399.199650@h54g2000cwb.googlegroups.com>
	<1163430016.542861.130100@b28g2000cwb.googlegroups.com>
Message-ID: <1163463723.056150.184690@m7g2000cwm.googlegroups.com>


George Sakkis wrote:
> Carl Banks wrote:
> > George Sakkis wrote:
> > > If by 'respond to "+"' is implied that you can get a "TypeError:
> > > iterable argument required", as you get now for attempting "x in y" for
> > > non-iterable y, why not ?
> >
> > Bad idea on many, many levels.  Don't go there.
>
> Do you also find the way "in" works today a bad idea ?

Augh.  I don't like it much, but (assuming that there are good use
cases for testing containment in iterables that don't define
__contains__) it seems to be the best way to accomplish it for
iterables in general.  However, "in" isn't even comparable to "add"
here.

First of all, unlike "add", the nature of "in" more of less requires
that the second operand is some kind of collection, so surprises are
kept to a minimum.  Second, testing containment is just a bit more
important, and thus deserving of a special case, than chaining
iterables.

The problem is taking a very general, already highly overloaded
operator +, and adding a special case to the interpreter for one of the
least common uses.  It's just a bad idea.


> > 3. While not breaking backwards compatibility in the strictest sense,
> > the adverse effect on incorrect code shouldn't be brushed aside.  It
> > would be a bad thing if this incorrect code:
> >
> > a = ["hello"]
> > b = "world"
> > a+b
> >
> > suddenly started failing silently instead of raising an exception.
>
> That's a good example for why I prefer an iterator rather than an
> iterable algebra; the latter is too implicit as "a + b" doesn't call
> only __add__,  but __iter__ as well. On the other hand, with a concrete
> iterator type "iter(a) + iter(b)" is not any more error-prone than
> 'int(3) + int("2")' or 'str(3) + str("2")'.
>
> What's the objection to an *iterator* base type and the algebra it
> introduces explicitly ?

Well, it still makes it more work to implement iterator protocol, which
is enough reason to make me -1 on it.  Anyways, I don't think it's very
useful to have it for iterators because most people write functions for
iterables.  You'd have to write "iter(a)+iter(b)" to chain two
iterables, which pretty much undoes the main convenience of the +
operator (i.e., brevity).  But it isn't dangerous.


Carl Banks



From mail at microcorp.co.za  Mon Nov 20 01:12:15 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 20 Nov 2006 08:12:15 +0200
Subject: Getting value from Tkinter entry widget: variable scope difficulty
References: <a5ddc$45611064$4275d90a$31958@FUSE.NET>
Message-ID: <01c101c70c6b$c06f44a0$03000080@hendrik>

"Kevin Walzer" <kw at kevin-walzer.com>

> I'm trying to construct a simple Tkinter GUI and I'm having trouble with
> getting the value of an entry widget and passing it onto a callback
> function. But I'm not grokking variable scope correctly.
>
> I have two functions. Here are the relevant excerpts:
>
> def makeGUI():
>
>    ###lots of code to set up toplevel windows
>
>     searchbutton=Button(topframe, image=searchglass, command=doSomething)
>     searchbutton.image=searchglass
>     searchbutton.pack(side=LEFT,  expand = NO)
>
>     searchterm=StringVar()

this will make a new local variable - if you want to assign to the global one,
you need to add a global statement before doing this, in this makeGUI function.
- you can read the global here if you have defined searchterm in an outer scope,
but the assign will make a new local one.

>
>     entryterm=Entry(topframe, textvariable=searchterm)
>     entryterm.pack(side=RIGHT)
>
>     entrylabel=Label(topframe, text="Search:")
>     entrylabel.pack(side=RIGHT)
>
>
> def doSomething():
>
> file = os.popen('systemcommand %s' % searchterm, 'r')

here searchterm seems to be a command line variable.
look in the help for sys.argv how to access command line variables

- not that you need to, but its good to know...   :-)

had makeGUI been a class instead of a function, you could have
written makeGUI.searchterm here, without mucking around with globals....

>
> print searchterm
>
> ---
>
> What I want to happen is the value of searchterm to be passed on to the
> doSomething() call when the searchbutton is pressed. Right now it
> appears the value of "searchterm" is local to each function.
>

True

> In Tcl this would be handled by simply assigning the variable
> "searchterm" to the global namespace in each function, i.e. "global
> searchterm." I've looked and can't quite figure out how to do this in
> Python. Any advice is appreciated.

global searchterm             # - in outer scope

global searchterm             # - in inner scope before assign


HTH - Hendrik




From rpdooling at gmail.com  Fri Nov 24 11:47:16 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 24 Nov 2006 08:47:16 -0800
Subject: Active State and Komodo...
References: <pan.2006.11.24.11.35.20.615402@creativewebnet.com>
	<pan.2006.11.24.15.48.05.346309@creativewebnet.com>
Message-ID: <1164386836.507478.100330@f16g2000cwb.googlegroups.com>

Steve Thompson wrote:
> On Fri, 24 Nov 2006 06:35:21 -0500, Steve Thompson wrote:
>
> > Addionally, is the eric IDE (version 3) an acceptible IDE or are there
> > more easy and more productive IDE's for perl?

Perl? You're on a Python list?  Anyway, the subject of IDEs comes up
every other day. If you want comparisons or discussion of Eric and
Python, search the group for "Eric IDE"

http://groups.google.com/group/comp.lang.python/search?q=eric+ide&start=0&scoring=d&

If the link breaks, use:

http://tinyurl.com/yxy8vv

I use vim 7.0 and Komodo myself. Both are cross platform. You'll see
hundreds of different opinions here.

rd

"A couple of months in the laboratory can save a couple of hours in the
library."



From guettli.usenet at thomas-guettler.de  Tue Nov 28 10:21:49 2006
From: guettli.usenet at thomas-guettler.de (Thomas Guettler)
Date: 28 Nov 2006 15:21:49 GMT
Subject: HTML Table-of-Content Extraction Script
References: <ekh4bn$782$1@news.albasani.net>
Message-ID: <4t32gdF118i0hU1@mid.individual.net>

robert wrote:

> I'm looking for a function which extracts a table of contents of HTML file(s) from <Hx....><a name=...></a>...</Hx> and possibly auto-creates the ancors.
> Maybe something already exists?

You can try mine:
http://www.thomas-guettler.de/scripts/number-html-headings.py.txt

-- 
Thomas G?ttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From meyer at acm.org  Fri Nov 24 12:05:30 2006
From: meyer at acm.org (Andre Meyer)
Date: Fri, 24 Nov 2006 18:05:30 +0100
Subject: synching with os.walk()
In-Reply-To: <1164386233.446742.67640@f16g2000cwb.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164385629.462106.106120@j72g2000cwa.googlegroups.com>
	<1164386233.446742.67640@f16g2000cwb.googlegroups.com>
Message-ID: <7008329d0611240905n597c4140kb063d15ab424f8ad@mail.gmail.com>

What I forgot to mention is that I want this to run unmodified from both
Windows and Linux (and Mac). Otherwise, there are enough options to choose
from, besides developing it myself, I guess.

On 24 Nov 2006 08:37:13 -0800, Paddy <paddy3118 at netscape.net> wrote:
>
>
> Paddy wrote:
>
> > Andre Meyer wrote:
> >
> > > Hi all
> > >
> > > os.walk() is a nice generator for performing actions on all files in a
> > > directory and subdirectories. However, how can one use os.walk() for
> walking
> > > through two hierarchies at once? I want to synchronise two directories
> (just
> > > backup for now), but cannot see how I can traverse a second one. I do
> this
> > > now with os.listdir() recursively, which works fine, but I am afraid
> that
> > > recursion can become inefficient for large hierarchies.
> > >
> > > thanks for your help
> > > Andr?
> >
> > Walk each tree individually gathering file names relative to the head
> > of the tree and modification data.
> >
> > compare the two sets of data to generate:
> >  1. A list of what needs to be copied from the original to the copy.
> >  2. A list of what needs to be copied from the copy to the original
> >
> > Do the copying.
> >
> > |You might want to show the user what needs to be done and give them
> > the option of aborting after generating the copy lists.
> >
> > - Paddy.
> P.S. If you are on a Unix type system you can use tar to do the copying
> as you can easily compress the data if it needs to go over a sow link,
> and tar will take care of creating any needed directories in the
> destination if you create new directories as well as new files.
> - Paddy.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Dr. Andre P. Meyer                        http://python.openspace.nl/meyer
TNO Defence, Security and Safety          http://www.tno.nl/
Delft Cooperation on Intelligent Systems  http://www.decis.nl/

Ah, this is obviously some strange usage of the word 'safe' that I wasn't
previously aware of. - Douglas Adams
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From bla at bla.com  Thu Nov 30 10:45:34 2006
From: bla at bla.com (Vincent Delporte)
Date: Thu, 30 Nov 2006 16:45:34 +0100
Subject: "fork and exit" needed?
References: <8osmm21skionildtnme1j0nvqbla6oqk72@4ax.com>	<pan.2006.11.28.09.15.45.744752@gmx.net>	<slrnemo29a.v6i.nick@irishsea.home.craig-wood.com>	<7nqtm25fq8vk4jlu577n974hgei3ese3g7@4ax.com>
	<hnrtm25a9s72a6bacjocreq4md14sr4qar@4ax.com>
	<mailman.883.1164900311.32031.python-list@python.org>
Message-ID: <q2vtm2pkgq7i96epas2u0k6blmfo3pk6gp@4ax.com>

On Thu, 30 Nov 2006 10:18:24 -0500, "Mike C. Fletcher"
<mcfletch at vrplumber.com> wrote:
>which is how Linux knows what interpreter to use for the script.

Thanks. That's what I found out after a bit more research. I didn't
pay attention to this because it's not needed to run under Windows,
and I was focusing on the fork() and stdout thing.


From anderslanglands at gmail.com  Wed Nov 22 09:43:55 2006
From: anderslanglands at gmail.com (anders)
Date: 22 Nov 2006 06:43:55 -0800
Subject: PyQt app in seperate thread
In-Reply-To: <mailman.590.1164205630.32031.python-list@python.org>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
Message-ID: <1164206635.601219.36860@j44g2000cwa.googlegroups.com>


Phil Thompson wrote:
> On Wednesday 22 November 2006 2:06 pm, anders wrote:
> > Phil Thompson wrote:
> > > On Wednesday 22 November 2006 12:37 pm, anders wrote:
> > > > I am writing a plugin for a piece of software in python, and I want to
> > > > start up a PyQt GUI in the plugin, without stalling the main thread
> > > > while the gui is running (later i will want to pass messages between
> > > > the main thread and the gui thread).
> > > >
> > > > I'm new to pyqt, so I'm probably doing something very silly, but for
> > > > the moment I'm just trying to get the first pyqt tutorial example
> > > > running in a seperate thread:
> > > >
> > > > ----8<--------
> > > >
> > > > import sys
> > > > from PyQt4 import QtGui
> > > > from PyQt4 import QtCore
> > > >
> > > > class MyThread( QtCore.QThread ):
> > > > 	def __init__( self ):
> > > > 		QtCore.QThread.__init__( self )
> > > >
> > > > 	def run( self ):
> > > > 		app = QtGui.QApplication( sys.argv )
> > > > 		hello = QtGui.QPushButton( 'Hello world!' )
> > > > 		hello.resize( 500, 500 )
> > > > 		hello.show()
> > > > 		app.exec_()
> > > > 		QtCore.QThread.terminate(  )
> > > >
> > > >
> > > >
> > > > mt = MyThread()
> > > > mt.start()
> > > > print 'Main thread continuing...'
> > > > mt.wait()
> > > > print 'GUI thread finished.'
> > > >
> > > > ----8<--------
> > > >
> > > > The app starts up (with a warning WARNING: QApplication was not created
> > > > in the main() thread. ). I get a window, but no button, and clicking on
> > > > the close button does nothing and I have to force the program to quit.
> > > >
> > > > There's got to be a way to get this working, right? Can anyone help me
> > > > along the right path?
> > >
> > > Read http://doc.trolltech.com/4.2/threads.html
> > >
> > > In particular the bit that says that exec_() must be called from the main
> > > thread and not from a QThread.
> > >
> > > Phil
> >
> > OK so that's all good... so how do I go about doing what I want then?
> > Can I set up a window in the second thread and start its event loop
> > without running the event loop in the core app?
>
> No. Read the second sentence of the paragraph I referred to. Also read the
> section "QObject Reentrancy".
>
> Phil

OK I see that now. Thanks for pointing that out. So basically, I can't
do what I want at all. That's a bit of a pain. Is there no way of
tricking Qt into thinking I'm running it in the main thread?

A



From cbarbez at gmail.com  Sun Nov 12 08:07:03 2006
From: cbarbez at gmail.com (DarkPearl)
Date: 12 Nov 2006 05:07:03 -0800
Subject: service windows avec py2exe
References: <1163157344.987173.259940@i42g2000cwa.googlegroups.com>
	<mailman.2072.1163197099.11739.python-list@python.org>
	<1163242265.307783.122230@f16g2000cwb.googlegroups.com>
Message-ID: <1163336823.477761.68070@m7g2000cwm.googlegroups.com>

 ok,

It's this line who crash the service :

self.WMIService
=win32com.client.GetObject(r"winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")


why this function goes when it is not a service?

with IDLE -> ok
with py2exe executable (no windows service) -> ok
with py2exe service option true (windows service) -> CRASH....



From geskerrett at hotmail.com  Tue Nov 28 13:12:36 2006
From: geskerrett at hotmail.com (geskerrett at hotmail.com)
Date: 28 Nov 2006 10:12:36 -0800
Subject: Reading text labels from a Win32 window
Message-ID: <1164737556.265751.38680@l12g2000cwl.googlegroups.com>

Does anyone know of a way to read text labels from a Win32 application.
I am familiar with using pywin32 and the SendMessage function to
capture text from Buttons,text boxex, comboboxes, etc, however, the
text I am would like to capture doesn't appear to be in a control.



From jweida at gmail.com  Mon Nov  6 14:11:19 2006
From: jweida at gmail.com (Jerry)
Date: 6 Nov 2006 11:11:19 -0800
Subject: adding python scripting to my application
In-Reply-To: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
References: <1162794251.047389.297800@e3g2000cwe.googlegroups.com>
Message-ID: <1162840279.875373.301550@f16g2000cwb.googlegroups.com>

I am not a Python guru by any means, but I believe that when an
application says that you can "script" their application with Python,
it means that you can actually write Python code to interact with the
application.  Embedding may be the same thing.  Extending (as I read
it) involves writing portions of your program in Python and have do the
logic portions.

If you would like to allow users to write small scripts that interact
with your program and control it (a la VBScript or AppleScript), then I
believe embedding Python in your program is what you want.

If you would like Python to run various parts of your program in order
to make some portions easier to write/manage/whatever, then you want to
"extend" your program using Python.

The key difference being that you aren't providing a way for someone
else to interact with your program using Python if you are extending.

Again, I am not a guru and a read through the docs on python.org would
probably be the best place to get sound technical advice on these
subjects.

--
Jerry



From fredrik at pythonware.com  Wed Nov 15 04:13:48 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Nov 2006 10:13:48 +0100
Subject: Difference
In-Reply-To: <1163579012.18671.10.camel@localhost>
References: <1163579012.18671.10.camel@localhost>
Message-ID: <ejeloc$m2u$2@sea.gmane.org>

Hodren Naidoo wrote:

> Can someone plz tell me the differences between redirect and traverse in
> python metadata?

it's not clear what you mean by "redirect", "traverse" or "python 
metadata", so that's not very likely.

</F>



From spedrosa at gmail.com  Thu Nov 16 16:07:39 2006
From: spedrosa at gmail.com (Stephen Eilert)
Date: 16 Nov 2006 13:07:39 -0800
Subject: Will GPL Java eat into Python marketshare?
In-Reply-To: <455cc9ae$1@news.unimelb.edu.au>
References: <1163624095.187124.88670@e3g2000cwe.googlegroups.com>
	<455b978c$1@news.unimelb.edu.au>
	<_jT6h.7906$ig4.2956@newsread2.news.pas.earthlink.net>
	<xqx3b8jgxx6.fsf@cola3.ca.boeing.com>
	<455cc9ae$1@news.unimelb.edu.au>
Message-ID: <1163711259.597170.116020@e3g2000cwe.googlegroups.com>


Maurice LING escreveu:

> >
> > I once wrote a partial JVM in Modula-3 (strictly a researchware
> > effort), so I can imagine it being done technically.  But why?
> >
> > The big problem with Java-and-Python is not the VMs underneath.  It is
> > the fact that Java has layers upon layers upon layers of idiosyncratic
> > libraries and idioms.  When you write bindings to that world (even if
> > the bindings are generated automagically), you have to *think* in
> > those same layers.  The Python-oriented developer suddenly has to use
> > a dozen imports in order to do things already done better in
> > Pythonesque libraries.
> >
>
> The main use I can see is to be able to incorporate Java applications
> into Python. For example, I am using Cytoscape (www.cytoscape.org) which
> is in Java. I do hope that I can control Cytoscape from Python and
> manipulate its objects from Python.
>
> Say given cytoscape.jar, I'll like to be able to do this:
>
>  >>> from cytoscape javaimport cytoscape
>  >>> c = cytoscape()
>
> And the tighest way I see that this can be done is for Python VM to
> execute Java bytecodes like Python bytecodes. That is, Python VM
> executes Java bytecodes directly and not through object mapping which I
> think is that JPyPe is doing.
>
> I must say that this is part of even a fluffier dream that one day, I
> can take any applications and play around with it in Python. Currently,
> my collaborators wrote in Perl and Java, so it is not easy for me to use
> their work in my work.
>
> ML

What is wrong with the other way around and Jython?

Just curious.


Stephen



From bearophileHUGS at lycos.com  Sun Nov 26 05:47:30 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Nov 2006 02:47:30 -0800
Subject: problem about list indexing
In-Reply-To: <1164537532.420669.323520@45g2000cws.googlegroups.com>
References: <1164529513.862598.221550@h54g2000cwb.googlegroups.com>
	<1164533754.269071.149590@n67g2000cwd.googlegroups.com>
	<1164537532.420669.323520@45g2000cws.googlegroups.com>
Message-ID: <1164538050.587119.190790@n67g2000cwd.googlegroups.com>

hollowspook:
> how about indexing 1-7, 10
> [range(1:8),10] will generate [[1, 2, 3, 4, 5, 6, 7], 10], instead of
> [1, 2, 3, 4, 5, 6, 7, 10]

(Note that range(1:8) is a syntax error).

You can join and extend lists as you like:

>>> range(1, 8) + [10]
[1, 2, 3, 4, 5, 6, 7, 10]

See also the list.append and list.extend methods too.

Bye,
bearophile



From deets at nospam.web.de  Sun Nov 19 09:32:13 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 19 Nov 2006 15:32:13 +0100
Subject: lxml/ElementTree and .tail
In-Reply-To: <1163945474.011407.218600@m7g2000cwm.googlegroups.com>
References: <mailman.208.1163621095.32031.python-list@python.org>
	<455C1887.6060602@web.de>
	<1163671192.876928.35960@f16g2000cwb.googlegroups.com>
	<ejhdgm$gve$1@sea.gmane.org>
	<761846B7-E374-41FE-8804-CBB3D42FD4D2@snowtide.com>
	<mailman.251.1163679925.32031.python-list@python.org>
	<mailman.408.1163844581.32031.python-list@python.org>
	<mailman.412.1163853827.32031.python-list@python.org>
	<0wD7h.77$_H5.56@tornado.texas.rr.com>
	<1163945474.011407.218600@m7g2000cwm.googlegroups.com>
Message-ID: <4sb87dFv0rtkU1@mid.uni-berlin.de>

> You'll be surprised at how many XMLers agree that Web services are a
> pretty inept reinvention of CORBA.  I was pretty much slain by this
> take:
> 
> http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple

Thanks for that! Sums up nicely my experiences, and gave me a good chuckle!

While I liked the idea of AXIS reflecting my java code in the first 
place (as long as interoperability only meant "I can test my own code"), 
it sucked soooo hard when trying to make it work with anything else 
(including python of course).

And I don't know why I've complained about this style of inverse 
interface generation on so many other occasions (e.g. COM interfaces in 
VStudio, JBuilder GUI design and so on), but could never quite put the 
finger on what disturbed me on SOAP.

Probably because looking at a WSDL it immediately made me shrink away 
from that mess and hope that there must be _some_ merciful deity that 
will produce that crap for me, so that I never asked myself  the right 
questions....

Diez


From paddy3118 at netscape.net  Wed Nov 15 02:10:07 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Nov 2006 23:10:07 -0800
Subject: refactoring so that multiple changes can be made with one
	variable?
In-Reply-To: <455a3a7f$0$32421$c3e8da3@news.astraweb.com>
References: <4559e396$0$32430$c3e8da3@news.astraweb.com>
	<1163522075.704650.40850@i42g2000cwa.googlegroups.com>
	<455a3a7f$0$32421$c3e8da3@news.astraweb.com>
Message-ID: <1163574607.417931.139260@e3g2000cwe.googlegroups.com>


John Salerno wrote:

> Paddy wrote:
>
> > You could keep a handle on all object instances created then go through
> > the objects making appropriate changes, e.g:
> >
> >
> > class Character(object):
> >      instances = []
> >      def __init__(self, name, strength, dexterity, intelligence):
> >           instances.append(self)
> >           # as before ...
> >      def mod_instances(self):
> >           for inst in instances:
> >                inst.some_property += 1     # or whatever
> > # (Untested)
>
> But doesn't this require that the change be predetermined so you can
> code it into the method?
>
> I don't necessarily need a programmatic way to do this, just a simple
> way to go back to the code and edit a single thing, instead of having to
> update all the numbers.

I just put in a simple version of mod_instances. mod_instances could
take a function as an argument the napply the function to all
instances, e.g:

def mod_func1(inst):
  inst.abc += inst.xyz  # or whatever

class Character(object):
      instances = []
      def __init__(self, name, strength, dexterity, intelligence):
           instances.append(self)
           # as before ...
      def mod_instances(self, mod_func):
           for inst in instances:
                mod_func(inst)

You can define different mod_func, like mod_func1 to make whatever
changes to the instances.



From johnzenger at gmail.com  Wed Nov 29 22:53:24 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 29 Nov 2006 19:53:24 -0800
Subject: a quickie: range - x
In-Reply-To: <1164858136.495250.180790@14g2000cws.googlegroups.com>
References: <1164858136.495250.180790@14g2000cws.googlegroups.com>
Message-ID: <1164858804.368067.274270@16g2000cwy.googlegroups.com>

(x for x in xrange(N+1) if x != m)

rjtucke wrote:
> I want an iterable from 0 to N except for element m (<=M).
> I could write
> x = range(N)
> x.remove(m)
> but I want it in one expression.
> 
> Thanks,
> Ross



From john106henry at hotmail.com  Fri Nov 17 14:00:39 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 11:00:39 -0800
Subject: How fuzzy is get_close_matches() in difflib?
In-Reply-To: <pan.2006.11.17.08.19.21.505181@REMOVEME.cybersource.com.au>
References: <1163724049.225348.118020@h54g2000cwb.googlegroups.com>
	<pan.2006.11.17.02.06.04.361949@REMOVEME.cybersource.com.au>
	<1163737190.118975.227740@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.05.09.22.451010@REMOVEME.cybersource.com.au>
	<1163746781.666937.63970@h48g2000cwc.googlegroups.com>
	<pan.2006.11.17.08.19.21.505181@REMOVEME.cybersource.com.au>
Message-ID: <1163790039.738976.294330@m7g2000cwm.googlegroups.com>

Steven D'Aprano wrote:

<snip>

>
> >>> s = difflib.SequenceMatcher(None, "HIDEDCT1", "HIDESCT1")
> >>> t = difflib.SequenceMatcher(None, "HIDEDST1", "HIDESCT1")
> >>>
> >>> for block in s.get_matching_blocks():
> ...     print "a[%d] and b[%d] match for %d elements" % block
> ...
> a[0] and b[0] match for 4 elements
> a[5] and b[5] match for 3 elements
> a[8] and b[8] match for 0 elements
> >>>
> >>> for block in t.get_matching_blocks():
> ...     print "a[%d] and b[%d] match for %d elements" % block
> ...
> a[0] and b[0] match for 4 elements
> a[5] and b[4] match for 1 elements
> a[6] and b[6] match for 2 elements
> a[8] and b[8] match for 0 elements
> >>>
>
> I think what you are seeing is an artifact of the precise details of the
> pattern matcher. Feel free to subclass the SequenceMatcher or Differ
> classes to get the results you expect :-)
>

Looks like for this particular case, looking at number of matched
groups worked better.



From john106henry at hotmail.com  Fri Nov 17 16:22:19 2006
From: john106henry at hotmail.com (John Henry)
Date: 17 Nov 2006 13:22:19 -0800
Subject: remove a list from a list
In-Reply-To: <1163792916.095832.259010@m73g2000cwd.googlegroups.com>
References: <ejkv1u$ajf$1@sea.gmane.org><455E0A20.9000509@tim.thechases.com>
	<mailman.369.1163792062.32031.python-list@python.org>
	<1163792832.404528.187950@k70g2000cwa.googlegroups.com>
	<1163792916.095832.259010@m73g2000cwd.googlegroups.com>
Message-ID: <1163798539.346514.221000@h54g2000cwb.googlegroups.com>

OK, if you don't care the resulting order, do it like:

class Convert2Dict:
    def __init__(self, data):
	self._data={}
	for x in data:
	    self._data[x.upper()]=x
    def get(self, key):
	return self._data[key.upper()]

a = ["a", "B"]
b = ["c", "a", "A", "D", "b"]
b_dict = Convert2Dict(b)

b = [b_dict.get(x) for x in list( set([x.upper() for x in b]) -
set([x.upper() for x in a]) ) ]


John Henry wrote:
> Scratch that.  b becomes all upper...
>
> John Henry wrote:
> > from sets import Set as set   # Python 2.3
> >
> > b = list( set([i.upper() for i in b) - set([i.upper() for i in a] ) )
> >
> >
> > Rares Vernica wrote:
> > > Yeah, I ended up doing a similar kind of loop. That is pretty messy.
> > >
> > > Is there any other way?
> > >
> > > Thanks,
> > > Ray
> > >
> > > Tim Chase wrote:
> > > >> That is a nice solution.
> > > >>
> > > >> But, how about modifying the list in place?
> > > >>
> > > >> That is, l would become ['c', 'D'].
> > > >>
> > > >>>  >>> e = ['a', 'b', 'e']
> > > >>>  >>> l = ['A', 'a', 'c', 'D', 'E']
> > > >>>  >>> s = set(e)
> > > >>>  >>> [x for x in l if x.lower() not in s]
> > > >>> ['c', 'D']
> > > >
> > > >
> > > > Well...changing the requirements midstream, eh? ;-)
> > > >
> > > > You can just change that last item to be a reassignment if "l" is
> > > > all you care about:
> > > >
> > > >  >>> l = [x for x in l ...]
> > > >
> > > > Things get a bit hairier if you *must* do it in-place.  You'd
> > > > have to do something like this (untested)
> > > >
> > > > for i in xrange(len(l), 0, -1):
> > > > 	if l[i-1].lower() in s:
> > > > 		del l[i-1]
> > > >
> > > >
> > > > which should do the job.
> > > > 
> > > > -tkc
> > > > 
> > > > 
> > > >



From __peter__ at web.de  Tue Nov 14 11:17:04 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 17:17:04 +0100
Subject: modules and generated code
References: <mailman.146.1163514956.32031.python-list@python.org>
	<ejckue$ns2$01$1@news.t-online.com>
	<mailman.150.1163517249.32031.python-list@python.org>
Message-ID: <ejcq59$920$00$1@news.t-online.com>

Nigel Rantor wrote:

> Peter Otten wrote:
>> Nigel Rantor wrote:

>>> So, if I have a tool that generates python code for me (in my case,
>>> CORBA stubs/skels) in a particular package is there a way of placing my
>>> own code under the same package hierarchy without all the code living in
>>> the same directory structure.

>> http://docs.python.org/lib/module-pkgutil.html

> Yep, looks like that should work, but it doesn't. :-/
> 
> Do you have any idea whether other __init__.py scripts from the same
> logical module will still be run in this case?

I don't think it will.

> The generated code uses its init script to pull in other code.

You could invoke it explicitly via 

execfile("/path/to/generated/package/__init__.py") 

in the static package/__init__.py.

Peter


From fredrik at pythonware.com  Fri Nov 17 03:33:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Nov 2006 09:33:37 +0100
Subject: determining the bounds of a tuple returned from a database
In-Reply-To: <1163746899.262327.72100@h48g2000cwc.googlegroups.com>
References: <1163743636.125450.98410@b28g2000cwb.googlegroups.com>	<1163744646.708954.271010@f16g2000cwb.googlegroups.com>	<mailman.308.1163746322.32031.python-list@python.org>
	<1163746899.262327.72100@h48g2000cwc.googlegroups.com>
Message-ID: <ejjs5a$96s$1@sea.gmane.org>

ronrsr wrote:

> very sorry, that was my error - len(result[0]) and len(result[1]) both
> return 1 --
> 
> i think I'm misunderstanding what len() does - to me they appear to
> have 2 or 3 elements, or at least be composed of a string of some
> length.

from python's perspective, the data structure you're looking at looks
like

    tuple of
        tuple of
             one string
        tuple of
             one string
        tuple of
             one string
    etc

so len(result) is the number of tuples, and len(result[index]) is the 
number of strings in the inner tuples (=1).  to get at an individual 
string, do

    s = result[index][0]

to look inside the string, you need to apply the appropriate string 
operations to extract the data, or split it up in some suitable way. 
there's no way Python can figure out how a string appears to you; from 
Python's perspective, it's just a bunch of characters.

</F>



From __peter__ at web.de  Tue Nov 14 04:21:32 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Nov 2006 10:21:32 +0100
Subject: deleteing item from a copy of a list
References: <455984b5@quokka.wn.com.au>
Message-ID: <ejc1q5$hk8$01$1@news.t-online.com>

timmy <"timothy at open-networks.net"> wrote:

> i make a copy of a list, and delete an item from it and it deletes it 
> from the orginal as well, what the hell is going on?!?!?!
> 
> #create the staff copy of the roster
> ????????Roster2 = []
> ????????for ShiftLine in Roster:
> ????????????????#delete phone number from staff copy
> ????????????????Roster2.append(ShiftLine)
> ????????????????del Roster2[len(Roster2)-1][1]
> 
> Roster2 should have nothing to do with Roster, right??? doing a print of 
> both lists confirms that the phone number has been removed from both

You seem to have a list of lists and are making a new outer list. The lists
inside that outer list are not copied. You can copy them by calling
list(item) or copy.copy(item):

>>> roster = [
...     ["Tim", "12345", "some more"],
...     ["Jack", "54321", "whatever"],
... ]
>>> roster2 = []
>>> for item in roster:
...     item = list(item)
...     del item[1]
...     roster2.append(item)
...
>>> roster
[['Tim', '12345', 'some more'], ['Jack', '54321', 'whatever']]
>>> roster2
[['Tim', 'some more'], ['Jack', 'whatever']]

Peter


From grahamd at dscpl.com.au  Thu Nov 23 16:49:08 2006
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 23 Nov 2006 13:49:08 -0800
Subject: WSGI with mod_python (was: Python, WSGI, legacy web application)
References: <mailman.615.1164238782.32031.python-list@python.org>
	<1164241791.372210.103330@b28g2000cwb.googlegroups.com>
	<mailman.622.1164260110.32031.python-list@python.org>
	<1164285174.400852.237700@j44g2000cwa.googlegroups.com>
	<1164286028.588780.281510@j44g2000cwa.googlegroups.com>
Message-ID: <1164318548.185492.25940@f16g2000cwb.googlegroups.com>

Paul Boddie wrote:
> Rob De Almeida wrote:
> > Ben Finney wrote:
> > > I was under the impression that WSGI in mod_python was a rather kludgy
> > > way to do WSGI, but I don't know what the alternatives are. CGI?
> > > Python http server (e.g. CherryPy)? Something else?
> >
> > You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee.
>
> I think the motivation behind suggesting an Apache solution was that
> you'd be able to migrate the PHP resources you already have running in
> Apache (I assume, since PHP can run in other places these days) to
> mod_python whilst staying within the Apache environment, rather than
> having to maintain a number of different environments at the same time.
> In other words, you'd write your replacement resources using WSGI (or
> whatever) on mod_python (for performance), CGI (for relative
> simplicity), or some other connection technology, and then it'd just be
> a matter of changing the various directives and having Apache figure it
> out.

Correct.

As example, imagine you have written a mod_python handler which itself
interprets how to map a URL to something to implement the URL. This
might map to a WSGI application or to some system of basic mod_python
handlers.

Within the .htaccess file of the directory where all your PHP files
live you could then write:

  PythonHandler myphppagereplacementhandler | .php

At this point nothing will happen, but then one could do the following:

  <Files index.php>
  SetHandler mod_python
  </Files>

For the one page called 'index.php' the mod_python handler would be
called instead of PHP. As a Python equivalent for each PHP page is
written, just need to trigger the mod_python handler to be used by
using the Files directive.

One could also have different handlers for each page and use Apache to
make the selection if wanted to:

  <Files index.php>
  SetHandler mod_python
  PythonHandler myphppagereplacementshandler::index
  </Files>

Now I am sure that some will say it looks messy, but as far as trying
to do a progressive replacement of pages and maintain URLs, it is
probably the quickest way. It should be said that any progressive
migration like this is likely to be a bit messy.

Don't like this, then another way using Apache might be to use
mod_rewrite to remap URLs to new URLs which use Python code. Using
mod_rewrite can be a pain though. Yet another way may be to use
mod_proxy to selectively forward URLs through to a separate back end
web server if you are Apache phobic and want to use a web server
written in pure Python.

Overall, Apache/mod_python has a lot to offer, but from what I have
seen most Python web frameworks simply uses it as a jumping off point
and not much else.

Graham



From justsayyes at charter.net  Sun Nov 19 05:28:11 2006
From: justsayyes at charter.net (JFletcher)
Date: Sun, 19 Nov 2006 02:28:11 -0800
Subject: need help?
Message-ID: <001b01c70bc5$6a6d4f80$6400a8c0@genesis>

Get Python help at TheScripts [dot] com


From allenjo5 at mail.northgrum.com  Thu Nov 16 15:45:18 2006
From: allenjo5 at mail.northgrum.com (allenjo5 at mail.northgrum.com)
Date: 16 Nov 2006 12:45:18 -0800
Subject: Question about unreasonable slowness
Message-ID: <1163709918.739398.194880@b28g2000cwb.googlegroups.com>

[ Warning: I'm new to Python.  Don't know it at all really yet, but had
to examine some 3rd party code because of performance problems with it.
]

Here's a code snippet:

i = 0
while (i < 20):
  i = i + 1
  (shellIn, shellOut) = os.popen4("/bin/sh -c ':'")  # for testing, the
spawned shell does nothing
  print 'next'
#  for line in shellOut:
#       print line

On my system (AIX 5.1 if it matters, with Python 2.4.3), this simple
loop spawning 20 subshells takes .75 sec.  Ok, that's reasonable.  Now,
if I uncomment the two commented lines, which loop over the empty
shellOut array, the progam now takes 11 secs.   That slowdown seems
very hard to believe.  Why should it slow down so much?

John.



From fredrik at pythonware.com  Wed Nov 22 04:13:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 10:13:50 +0100
Subject: How to sort list
In-Reply-To: <ejvjno$549$2@minji.szn.dk>
References: <1164136547.137154.126740@m73g2000cwd.googlegroups.com>
	<ejvjno$549$2@minji.szn.dk>
Message-ID: <ek14ce$aal$1@sea.gmane.org>

Klaus Alexander Seistrup wrote:

> Decorate-sort-undecorate?
> 
> #v+
> 
> array = []
> 
> for addr in Emails:
>   (user, domain) = addr.split('@')
>   array.append((domain, user, addr))
> # end for
> 
> array.sort()
> 
> SortedEmails = [addr for (user, domain, addr) in array]
> 
> #v-

note that DSU is built into Python these days:

     L.sort(key=transform)

so you could use e.g.

     Emails.sort(key=lambda s: s.partition("@")[::-1])

also see:

     http://preview.tinyurl.com/yc3qak
     http://effbot.org/zone/python-list.htm#sorting

</F>



From msherman77 at yahoo.com  Tue Nov 21 14:01:27 2006
From: msherman77 at yahoo.com (Michael S)
Date: Tue, 21 Nov 2006 14:01:27 -0500 (EST)
Subject: How good is CORBA?
In-Reply-To: <6559fb300611211036l306e99d6ibd354dcd285b243@mail.gmail.com>
Message-ID: <20061121190127.83586.qmail@web88305.mail.re4.yahoo.com>

I learned CORBA many years ago. If I am not mistaken
it had two main principles/purposes. One being
language neutrality and the other one to make
client/server type of programming easier (replacing
Remote Procedure Call??).
If you are using Python only, language neutrality
doesn't really help. You said you're writing web-based
applications, and you didn't specify whether you had
client/server interaction, so I don't know whether you
need it or not.
For code reuse (if that's the issue) you could use
subclassing and/or putting stuff into modules.

Hope I made some sense.
Michael



--- Sai Krishna M <saikrishbe at gmail.com> wrote:

> Hi everybody,
> 
> i have been developing web based applications using
> python+cheetah.
> 
> The numbers are increasing. The applications have
> many common parts of
> code. Though these applications are separate from
> each other they are
> run in the same server.
> 
> I heard about CORBA... but also heard that it has
> some flaws...like
> the programming being very complicated.
> Also heard that CORBA is no more used these days...
> 
> Can someone suggest me a better option or is corba
> fine?
> 
> Thanks,
> Sai
> -- 
> I love Freedom
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From michele.simionato at gmail.com  Tue Nov 21 04:14:18 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 21 Nov 2006 01:14:18 -0800
Subject: class method vs static method
In-Reply-To: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
References: <1164098781.577358.90850@j44g2000cwa.googlegroups.com>
Message-ID: <1164100457.993501.141540@h48g2000cwc.googlegroups.com>


Chris Brat wrote:
> Hi,
>
> I've done some reading up but I cant get my head around how/why class
> methods can be used as apposed to static methods.
>
> Can anyone give an example of where they have used class methods?
>
> Thanks,
> Chris

Class methods are typically used as factories:

class MyClass(object):
   @classmethod
   def myfactory(cls):
      self = cls()
      initialize(self)
      return self

With different factories you can obtain instances of the same classes
initialized in different ways. This is probably better than writing a
lot of subclasses
with different __init__s. This is my typical use case, but I am sure
others will post
many other examples of application. 

         Michele Simionato



From flamesrock at gmail.com  Mon Nov 20 02:16:51 2006
From: flamesrock at gmail.com (flamesrock)
Date: 19 Nov 2006 23:16:51 -0800
Subject: secure multiplayer using python?
Message-ID: <1164007011.110028.284350@f16g2000cwb.googlegroups.com>

How would YOU implement the system described below?

-many client program instances connect to a central file+db server
-all files on server (this directory) read-only by default to all
users, AND public
-client mirrors files on central server
-each client can 'claim' files on the server, which they have rw access
to
-over time intervals the client program checks to see if claimed files
on the client machine has been modified, and if so uploads to the
server, overwriting the old

I've heard terms like openssl and pgp thrown around, but how would I
implement these in python..?

Currently I am handing out ftp user/pass to each client program (hidden
from user) which they use for access, but if they mess around with the
code, it would be easy to snag this info, then log in and just delete
the entire file repository. I would like to keep the ftp
implementation, but make it so that users cannot get this information..
but obviously that is impossible.

What would you do? What is the most secure way?
This will probably be re-written from scratch, so go wild!!

-Thanks,
flamesrock



From pavlovevidence at gmail.com  Mon Nov 13 05:59:57 2006
From: pavlovevidence at gmail.com (Carl Banks)
Date: 13 Nov 2006 02:59:57 -0800
Subject: Python 3000 idea -- + on iterables -> itertools.chain
References: <slrnelfg32.6d3.jtr@ofb.net>
	<mailman.33.1163380668.32031.python-list@python.org>
	<1163385266.824914.265490@b28g2000cwb.googlegroups.com>
	<ej993b$tt7$1@news.albasani.net>
Message-ID: <1163415597.022620.153310@b28g2000cwb.googlegroups.com>

Georg Brandl wrote:
> What has a better chance of success in my eyes is an extension to yield
> all items from an iterable without using an explicit for loop: instead of
>
> for item in iterable:
>      yield item
>
> you could write
>
> yield from iterable
>
> or
>
> yield *iterable

Since this is nothing but an alternate way to spell a very specific
(and not-too-common) for loop, I expect this has zero chance of
success.


Carl Banks



From gabor at nekomancer.net  Sun Nov 19 15:06:51 2006
From: gabor at nekomancer.net (gabor)
Date: Sun, 19 Nov 2006 21:06:51 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <455E5D15.7030207@v.loewis.de>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
	<3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>
	<455E5D15.7030207@v.loewis.de>
Message-ID: <3e540$4560b958$59ad1aca$32456@news.flashnewsgroups.com>

Martin v. L?wis wrote:
> gabor schrieb:
>> depends on the application. in the one where it happened i would just
>> display an error message, and tell the admins to check the
>> filesystem-encoding.
>>
>> (in other ones, where it's not critical to get the correct name, i would
>> probably just convert the text to unicode using the "replace" behavior)
>>
>> what about using flags similar to how unicode() works? strict, ignore,
>> replace and maybe keep-as-bytestring.
>>
>> like:
>> os.listdir(dirname,'strict')
>>
>> i know it's not the most elegant, but it would solve most of the
>> use-cases imho (at least my use-cases).
> 
> Of course, it's possible to implement this on top of the existing
> listdir operation.
> 
> def failing_listdir(dirname, mode):
>   result = os.listdir(dirname)
>   if mode != 'strict': return result
>   for r in result:
>     if isinstance(r, str):
>       raise UnicodeDecodeError
>   return result
> 

yes, sure... but then.. it's possible to implement it also on top of an 
raise-when-error version :)

so, what do you think, how should this issue be solved?

currently i see 2 ways:

1. simply fix the documentation, and state that if the file-name cannot 
be decoded into unicode, then it's returned as byte-string. but that 
also means, that the typical usage of:

[os.path.join(path,n) for n in os.listdir(path)]

will not work.

2. add support for some unicode-decoding flags, like i wrote before

3. some solution.

?

gaobr


From phd at phd.pp.ru  Sat Nov 18 14:08:22 2006
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Sat, 18 Nov 2006 22:08:22 +0300
Subject: [Zopyrus] A python IDE for teaching that supports cyrillic i/o
In-Reply-To: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
References: <20061118190104.GA29614@58sirius016.dc.ukrtel.net>
Message-ID: <20061118190822.GB19739@phd.pp.ru>

On Sat, Nov 18, 2006 at 09:01:04PM +0200, Kirill Simonov wrote:
> Could anyone suggest me a simple IDE suitable for teaching Python as a
> first programming language to high school students?

   Does it have to be an IDE? Wouldn't it be better to use a simple text
editor + command line?

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From tnleeuw at gmail.com  Thu Nov 23 08:36:46 2006
From: tnleeuw at gmail.com (Tim N. van der Leeuw)
Date: 23 Nov 2006 05:36:46 -0800
Subject: Porting Tkinter application to JYthon
In-Reply-To: <mailman.619.1164257988.32031.python-list@python.org>
References: <mailman.619.1164257988.32031.python-list@python.org>
Message-ID: <1164289006.543874.307110@l12g2000cwl.googlegroups.com>

Hi,

sandip desale wrote:
> Dear All,
>
> We have a Tcl/Tk application written using Python 2.2. Using this application we want to call some customizable Java APIs. I tried porting Tcl/Tk application to Jython but not able to do the same as TKinter library is not available with JYthon.
>
> Can you please help me in porting Tkinter application to Jython? Also kindly let me know how to do the same.

Not having Tkinter in Jython, you can either rewrite your app to be a
Java Swing app, or you can embed the Java JVM into the Python
interpreter as an importable library. I believe some projects exist to
enable the latter, although I don't know of a URL.

Cheers,

--Tim
>
>
> Thanks & Regards,
> Sandip Desale
>
>
> --
> 
> Search for products and services at: 
> http://search.mail.com



From skip at pobox.com  Sun Nov 12 15:56:49 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 12 Nov 2006 14:56:49 -0600
Subject: Random image text generation?
In-Reply-To: <DaL5h.287$Ib3.250761@news.siol.net>
References: <mailman.21.1163361663.32031.python-list@python.org>
	<DaL5h.287$Ib3.250761@news.siol.net>
Message-ID: <17751.35473.578283.979433@montanaro.dyndns.org>


    >> Is there a module out there that will generate an image with a random
    >> text string such as the confirmation images you see on various
    >> websites?

    Mitja> They're called captcha images or captchas for short.  Googling
    Mitja> for "python captcha" returns several hits; see what you like...

Thanks.  I'd never heard that term before.  Assuming I can get PIL installed
with freetype support on my Mac the ASPN recipe looks like it will do the
trick.

Skip



From apardon at forel.vub.ac.be  Fri Nov 24 05:15:58 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 24 Nov 2006 10:15:58 GMT
Subject: locking bsddb objects
Message-ID: <slrnemdhiu.lqo.apardon@rcpc42.vub.ac.be>

This is a little project using python 2.3.5, I want to use one of
the bsddb objects, but I also need to protect against concurrent
access and modification. IMO this would be something for
fcntl.flock or fcntl.lockf. However the bsddb objects don't provide
a fileno method.

So how do I protect against concurrent access and modification?

-- 
Antoon Pardon


From jonas.esp at googlemail.com  Thu Nov 23 05:46:25 2006
From: jonas.esp at googlemail.com (GinTon)
Date: 23 Nov 2006 02:46:25 -0800
Subject: sys.stderr.write and sys.exit
Message-ID: <1164278785.075748.220690@j44g2000cwa.googlegroups.com>

Is the same use _sys.stderr.write('error message'); sys.exit(1)_  than
_sys.exit('error message')_ ?

Note: help(sys.exit)
If the status is omitted or None, it defaults to zero (i.e., success).
If the status is numeric, it will be used as the system exit status.
If it is another kind of object, it will be printed and the system exit
status will be one (i.e., failure).



From fredrik at pythonware.com  Sun Nov 19 15:18:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Nov 2006 21:18:19 +0100
Subject: ElementTree: namespace declaration in each element?
In-Reply-To: <1163966482.662827.99010@k70g2000cwa.googlegroups.com>
References: <1163939038.754792.48730@e3g2000cwe.googlegroups.com>	<mailman.458.1163940906.32031.python-list@python.org>
	<1163966482.662827.99010@k70g2000cwa.googlegroups.com>
Message-ID: <ejqe6f$v8n$1@sea.gmane.org>

cyberco wrote:

> OK, that's what I was already doing. Thanks.
> Will the standard serializer in 1.3 support default namespaces?

that's the plan.  I've been working on a more modular XML writer, which 
will make it easier to tweak the output in various ways, without having 
to write everything from scratch.

</F>



From filipwasilewski at gmail.com  Sat Nov 18 09:31:40 2006
From: filipwasilewski at gmail.com (Filip Wasilewski)
Date: 18 Nov 2006 06:31:40 -0800
Subject: numpy: frequencies
References: <ejn3dh$b7n$1@news.albasani.net>
Message-ID: <1163860300.030311.100110@j44g2000cwa.googlegroups.com>

robert wrote:
> I have an integer array with values limited to range(a,b) like:
>
> ia=array([1,2,3,3,3,4,...2,0,1])
>
> and want to speedly count the frequencies of the integers into get a density matrix.
> Is this possible without looping?

See numpy.bincount (for integers >= 0) if you mean 'without writing
looping code in Python' or please specify your question.

> Question 2: is it possible to compute a "moving maximum" without python looping
>
> ia=array([4,2,1,5,3,2,2,0,1,1])
> -> mvmax(ia,3) ->
>          [4,4,4,5,5,5,3,2,2,1])

I haven't seen a ready solution but this can be easily converted into
Pyrex/C looping.

cheers,
fw



From jonas.esp at googlemail.com  Tue Nov 21 09:25:45 2006
From: jonas.esp at googlemail.com (MindClass)
Date: 21 Nov 2006 06:25:45 -0800
Subject: Load objects using __import__
In-Reply-To: <1164117880.843179.24210@h54g2000cwb.googlegroups.com>
References: <1164114886.356071.14990@k70g2000cwa.googlegroups.com>
	<1164117880.843179.24210@h54g2000cwb.googlegroups.com>
Message-ID: <1164119145.452650.315340@f16g2000cwb.googlegroups.com>

Indeed before reading your message I solved it doing:

model_name = Country
mod = eval('i18n_module.%s' % model_name)
c1 = mod(name="Afghanistan")
exec c1

but I'll use getattr as you say. Thanks

Carl Banks ha escrito:

> MindClass wrote:
> > But when I load the object I get
> >     SyntaxError: invalid syntax
> >
> >     c1 = <module 'project.I18n.models' from
> > '/home/lala/django/project/I18n/models.pyc'>.Country(name="Afghanistan")
>
> It looks like you're running generated code somewhere, but passing the
> module itself rather than the name of the module to the code generator
> by mistake.  Perhaps you're execing some code that you pass the module
> name to?  Something like this?
>
> exec 'c1 = %s.Country(name="Afgahanstan")' % module_name
>
> You seem to be erroneously using the module itself, not the module
> name.
>
> That's about all I can help without more information.
>
>
> P.S. if you are doing that, consider using getattr instead of exec.
> 
> c1 = getattr(module,Country)(name="Afgansitan")
> 
> 
> Carl Banks



From steve at holdenweb.com  Fri Nov 17 10:08:35 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Nov 2006 15:08:35 +0000
Subject: Secure Python
In-Reply-To: <001501c70a50$440b4840$03000080@hendrik>
References: <mailman.219.1163646863.32031.python-list@python.org><pan.2006.11.16.04.23.10.208731@REMOVEME.cybersource.com.au><455c1665@quokka.wn.com.au><pan.2006.11.16.08.45.16.958572@REMOVEME.cybersource.com.au><455c4d9b@quokka.wn.com.au>	<ejhjr4$2vg$1@kohl.informatik.uni-bremen.de>
	<001501c70a50$440b4840$03000080@hendrik>
Message-ID: <ejkj7c$out$1@sea.gmane.org>

Hendrik van Rooyen wrote:
> "Stephan Kuhagen" <nospam at domain.tld> wrote:
> 
> 
>> The problem with linux kernel limits are, that they won't work really good
>> on MacOSX and Windows... OTOH the idea is the right one, but the effect can
>> be achieved inside of Python. Since Python does byte compile the code and
>> the interpreter evaluates each byte code token in one evaluation step. The
>> interpreter could be extended for such usecases to count and limit the
>> number of evaluation steps allowed for untrusted script or methods in
>> untrusted script as well as to limit the recursion depth or memory to be
>> allocated. All those limits are managed by the interpreter for script code
>> and hence can be limited for untrusted code by the interpreter. This also
>> does not really make DoS impossible (what about C extensions? - maybe
>> restricting "import"?). - As I said before in this thread, making a sandbox
>> really secure is a hard job, and may need some serious changes in the
>> Python interpreter, but AFAIK from Tcl, it is possible - and would be nice
>> to have.
> 
> I seem to recall previous discussion on this group about a thing called the
> bastion module,
> and that it was deprecated.  Not sure if it has any relevance.
> 
Anyone with an interest in secure Python should take a look at what 
Brett Cannon is doing in his postgraduate work. There have been some 
discussions on the python-dev list.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden



From amitsoni.1984 at gmail.com  Fri Nov 24 17:08:18 2006
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 24 Nov 2006 14:08:18 -0800
Subject: Installing CVXOPT
Message-ID: <1164406098.224855.157120@f16g2000cwb.googlegroups.com>

hi,

how can I install and start using CVXOPT. I have python 2.5 version
installed. what else do i need to download and install for CVXOPT.

thanks
amit



From gagsl-py at yahoo.com.ar  Sat Nov 25 00:56:47 2006
From: gagsl-py at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 25 Nov 2006 02:56:47 -0300
Subject: Simple threading
In-Reply-To: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
References: <1164295697.757788.26710@e3g2000cwe.googlegroups.com>
Message-ID: <7.0.1.0.0.20061125024927.01cf0690@yahoo.com.ar>

At Thursday 23/11/2006 12:28, jrpfinch wrote:

>I'm just getting started on threading and was wondering why the
>following code does not work (i know globals is bad style - I'll
>eliminate them eventually).  All I get is a blank cursor flashing.

You've got your example already working.
Globals are bad style, but worse, threads and globals don't mix very 
well: you need some sort of syncronization for accessing globals 
(specially for writing them).

>class ImapThread(threading.Thread):
>     def run(self):
>         global g_currenttick
>         if time.time() > (g_datum + (g_secondspertick *
>g_currenttick)):
>             print "Ticked %s" % g_currenttick
>             g_currenttick=g_currenttick+1
>             print g_currenttick

Having more than one thread, g_currenttick could have been modified 
*after* you read its value and *before* you write it back, so you 
lose the count.


-- 
Gabriel Genellina
Softlab SRL 

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ?gratis! 
?Abr? tu cuenta ya! - http://correo.yahoo.com.ar


From fredrik at pythonware.com  Tue Nov 28 10:48:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Nov 2006 16:48:16 +0100
Subject: Inheritance from builtin list and override of methods.
In-Reply-To: <1164727886.491487.176840@j72g2000cwa.googlegroups.com>
References: <200611261804.54669.mgiann@beta-cae.gr>	<200611271133.48359.mgiann@beta-cae.gr>	<ekecd9$e8c$1@sea.gmane.org>	<mailman.768.1164637881.32031.python-list@python.org>	<Xns988896361B9C5duncanbooth@127.0.0.1>	<Xns9888724C01B78OKB@199.45.49.11>	<mailman.779.1164656450.32031.python-list@python.org>	<Xns9888CD96B985AOKB@199.45.49.11>
	<1164727886.491487.176840@j72g2000cwa.googlegroups.com>
Message-ID: <ekhlnv$rjp$1@sea.gmane.org>

Carl Banks wrote:

> Because the concerns of thousands of legitimate programmers who want
> good performance out of their sorts outweigh the concerns of the one or
> two hax0r d00ds who think it would be cool to hook into sort internals.

... and haven't yet realized that using sorted() and converting back 
from the resulting list will outperform *any* solution they can come
up with themselves.

</F>



From korvus at gmail.com  Thu Nov 16 21:21:51 2006
From: korvus at gmail.com (Jeff  Poole)
Date: 16 Nov 2006 18:21:51 -0800
Subject: cPickle problems
In-Reply-To: <mailman.297.1163728684.32031.python-list@python.org>
References: <1163722893.992949.295350@b28g2000cwb.googlegroups.com>
	<1163723175.530850.185990@m73g2000cwd.googlegroups.com>
	<1163724509.572724.199720@f16g2000cwb.googlegroups.com>
	<mailman.297.1163728684.32031.python-list@python.org>
Message-ID: <1163730111.641857.142850@k70g2000cwa.googlegroups.com>

Good idea.  Well, I did that, and I found out that the object causing
problems is a ParseResults object (a class from PyParsing) and that the
__getstate__ member is in fact an empty string ('').  I'm not sure
where this leaves me...  The PyParsing code clearly never creates such
a member and my code never creates it.  In fact, searching all the code
involved (not including what is in /usr/lib/python2.4 ), shows no use
of __getstate__ at all (or even the string "getstate").

Ok, I figured it out.  ParseResults has the following member:

    def __getattr__( self, name ):
        if name not in self.__slots__:
            if self.__tokdict.has_key( name ):
                if name not in self.__accumNames:
                    return self.__tokdict[name][-1][0]
                else:
                    return ParseResults([ v[0] for v in
self.__tokdict[name] ])
            else:
                return ""
        return None

So when something tries to retrieve .__getstate__, it returns an empty
string.  If I tell it to raise an AttributeException instead, then I
get this message:

TypeError: a class that defines __slots__ without defining __getstate__
cannot be pickled

I think I need to talk to the author of PyParsing about this one...
Thanks for your help!


Jeff


> Someway, self.__getstate__ is a string, not a method...
> Since it fails inside a python module, you could print some debug
> information to see what happens, like repr(self), type(self), repr(getstate)...
>
>
>
> --
> Gabriel Genellina
> Softlab SRL
>
> __________________________________________________
> Correo Yahoo!
> Espacio para todos tus mensajes, antivirus y antispam ?gratis!
> ?Abr? tu cuenta ya! - http://correo.yahoo.com.ar



From steve at holdenweb.com  Mon Nov 13 15:27:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Nov 2006 14:27:22 -0600
Subject: jython's future
In-Reply-To: <4558BB29.4020002@gmail.com>
References: <1163425734.640509.99420@m73g2000cwd.googlegroups.com>	<QZmdnXy99YfNEMXYnZ2dnUVZ_uudnZ2d@comcast.com>	<1163433118.770742.262140@e3g2000cwe.googlegroups.com>	<4rrjenFspqicU2@mid.uni-berlin.de>	<4558ACAC.1030001@web.de>	<1163440390.3434.45.camel@dot.uniqsys.com>
	<ejac9n$21u$1@sea.gmane.org> <4558BB29.4020002@gmail.com>
Message-ID: <4558D52A.3090109@holdenweb.com>

?ukasz Langa wrote:
> Steve Holden:
>> I think you will find that most of Fredrik Lundh's stuff will work on 
>> 1.5.2. He sets a fine example to us all.
>>   
> 
> 1.5.2? Come on, it's 7 years old. Back then PHP was still at 3.0, Java 
> was at 1.2 (and compiling Hello World took over 5 minutes), Google was 
> nothing more than a search engine (still Beta at the time!).
> 
> What do we have all these cool new language features for if it's 
> considered bad behaviour to actually use them?
> 
> OK, I see the point in being compatible with Python 2.1 (well, maybe 2.2 
> with new-style classes and __descriptors__), just like it's still useful 
> to be Java 1.4 compatible and PHP 4 compatible.
> 
> But Python 1.5.2? From the official site: "*Do yourself a favor* and get 
> a more recent version!" ;-) It doesn't even have string methods. Today 
> Python 1.5.2 is being implemented on one-chip GSM modules ( 
> http://www.telit.co.it/product.asp?productId=96 ). And yes, it actually 
> works quite well there :-)
> 
And thanks to Fredrik there's a chance you'll be able to use PIL there.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb       http://holdenweb.blogspot.com
Recent Ramblings     http://del.icio.us/steve.holden


From Roberto.Bonvallet at cern.ch  Tue Nov 14 09:38:37 2006
From: Roberto.Bonvallet at cern.ch (Roberto Bonvallet)
Date: Tue, 14 Nov 2006 14:38:37 +0000 (UTC)
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
Message-ID: <ejckdd$e60$1@cernne03.cern.ch>

erikcw wrote:
> I have a collection of ordered numerical data in a list.  The numbers
> when plotted on a line chart make a low-high-low-high-high-low (random)
> pattern.  I need an algorithm to extract the "significant" high and low
> points from this data.

In calculus, you identify high and low points by looking where the
derivative changes its sign.  When working with discrete samples, you can
look at the sign changes in finite differences:

>>> data = [...]
>>> diff = [data[i + 1] - data[i] for i in range(len(data))]
>>> map(str, diff)
['0.4', '0.1', '-0.2', '-0.01', '0.11', '0.5', '-0.2', '-0.2', '0.6',
'-0.1', '0.2', '0.1', '0.1', '-0.45', '0.15', '-0.3', '-0.2', '0.1',
'-0.4', '0.05', '-0.1', '-0.25']

The high points are those where diff changes from + to -, and the low
points are those where diff changes from - to +.

HTH,
-- 
Roberto Bonvallet


From JKPeck at gmail.com  Mon Nov 13 09:23:23 2006
From: JKPeck at gmail.com (JKPeck)
Date: 13 Nov 2006 06:23:23 -0800
Subject: Character Encodings and display of strings
Message-ID: <1163427803.150232.221030@f16g2000cwb.googlegroups.com>

I am trying to understand why, with nonwestern strings, I sometimes get
a hex display and sometimes get the string printed as characters.

With my Python locale set to Japanese and with or without a # coding of
cp932 (this is Windows) at the top of the file, I read a list of
Japanese strings into a list, say, catlis.

With this code
for item in catlis:
	print item
print catlis
print " ".join(catlis)

the first print (print item) displays Japanese text as characters..
The second print (print catlis) displays a list with the double byte
characters in hex notation.
The third print (print " ".join(catlis)) prints a combined string of
Japanese characters properly.

According to the print documentation,
"If an object is not a string, it is first converted to a string using
the rules for string conversions"

but the result is different with a list of strings.

The hex display looks like this:
['id', '\x90\xab\x95\xca', '\x90\xb6\x94N\x8c\x8e\x93\xfa',
'\x8fA\x8aw\x94N\x90\x94', '\x90E\x8e\xed', '\x8b\x8b\x97^',
'\x8f\x89\x94C\x8b\x8b', '\x8d\xdd\x90\xd0\x8c\x8e\x90\x94',
'\x90E\x96\xb1\x8co\x97\xf0', '\x90l\x8e\xed']

and correctly shows the hex values of the Japanese characters.

Why are these different?

TIA,
Jon Peck



From rupole at hotmail.com  Tue Nov 28 07:47:48 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 28 Nov 2006 07:47:48 -0500
Subject: Accessing file metadata on windows XP
References: <1164704134.100569.101270@j72g2000cwa.googlegroups.com>
Message-ID: <1164718278_34797@sp6iad.superfeed.net>


<wileyregister22 at gmail.com> wrote in message news:1164704134.100569.101270 at j72g2000cwa.googlegroups.com...
> When rightclicking a, for example, pdf file on windows, one normally
> gets a screen with three or four tags.  Clicking on one of the summary
> tag one can get some info like "title", "Author", "category", "keyword"
> etc..
>
> My question is how can I programmatically read and change these data
> with python.  I know I should use Hammond's win32  extension, somehow
> involving the pythoncom, storagecon of win32com etc..  Unfortunately,
> so far I cannot get anything useful.  Instead of trying blindly, would
> somebody please points me to the correct direction.  A little snippet
> would help.  I am particular interested in pdf files.
>

See \win32com\test\testStorage.py for an example of using
the storage interfaces to read and write document summary
info.

         Roger




----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From no-spam at no-spam-no-spam.invalid  Wed Nov 29 13:19:07 2006
From: no-spam at no-spam-no-spam.invalid (robert)
Date: Wed, 29 Nov 2006 19:19:07 +0100
Subject: Detecting recursion loops
In-Reply-To: <1164813771.171053.93190@j44g2000cwa.googlegroups.com>
References: <ekk6qu$po0$1@news.albasani.net>
	<1164813771.171053.93190@j44g2000cwa.googlegroups.com>
Message-ID: <ekkius$im2$1@news.albasani.net>

Rob Wolfe wrote:
> robert wrote:
>> My code does recursion loops through a couple of functions. Due to problematic I/O input this leads sometimes to "endless" recursions and after expensive I/O to the Python recursion exception.
>> What would be a good method to detect recursion loops and stop it by user-Exception (after N passes or some complex criteria) without passing a recursion counter parameter through all the funcs?
> 
> What about `sys.setrecursionlimit`?
> 
> http://docs.python.org/lib/module-sys.html

That is a low level barrier. I just want to limit a certain recursion call chain.
 



From lowz06 at gmail.com  Sun Nov 19 17:32:45 2006
From: lowz06 at gmail.com (John (Z R) L)
Date: 19 Nov 2006 14:32:45 -0800
Subject: How do I stop Python IDLE (GUI) from immediately exiting when I
	enter it?
In-Reply-To: <pan.2006.11.19.16.59.35.983108@web.de>
References: <1163921048.878108.145810@j44g2000cwa.googlegroups.com>
	<pan.2006.11.19.16.59.35.983108@web.de>
Message-ID: <1163975565.887782.93050@h48g2000cwc.googlegroups.com>

Thanks for the replies so far. I do exactly what that website says, and
on the old computer (Windows 98), I click run module and nothing
happens. No text gets displayed on my IDLE. It contained that firewall
message at the top.

Back on the new computer, I deleted all of my .py files and I could go
back to the Python IDLE (GUI) again.

But my problem is with that when I run this module:
"a = 1
print a
a = a + 1
print a
a = a * 2
print a"  ,

the "1
2
4"
appears on the screen, but the program doesn't end. You don't get a new
">>>" like when you finish running all the other modules. So when I
want to run other modules, it says:
 "The Python Shell Window is already executing a command; please wait
until it is finished."

Note that all of my modules don't need any "end" at the last line, nor
do I need "raw_input" to end the program.

How do I make it so this module ends without using the word "end"
because it would exit the entire IDLE Shell?



From craigtw.online at gmail.com  Sun Nov 26 18:17:58 2006
From: craigtw.online at gmail.com (Craig)
Date: 26 Nov 2006 15:17:58 -0800
Subject: Generating header information using ElementTree
References: <1164574832.936947.69420@h54g2000cwb.googlegroups.com>
	<mailman.744.1164575372.32031.python-list@python.org>
	<1164579522.671325.36260@14g2000cws.googlegroups.com>
	<4suidqF10rlh1U1@mid.uni-berlin.de>
Message-ID: <1164583078.233238.227010@45g2000cws.googlegroups.com>

Diez B. Roggisch wrote:

> Craig schrieb:
> > Fredrik Lundh wrote:
> >
> >> Craig wrote:
> >>
> >>> I'm only new to Python so please bear with me.  I using ElementTree to
> >>> generate an XML file that will reference a DTD and an XSL file.  The
> >>> header information I want at the start of the file is as follows:
> >>>
> >>> <?xml version="1.0"?>
> >>> <?xml-stylesheet type="text/xsl" href="test.xsl"?>
> >>> <!DOCTYPE BobActivityLog SYSTEM "test.dtd">
> >>>
> >>> How do you add this header information to the tree
> >> to the file, you mean?  use print.
> >>
> >> </F>
> >
> > Thanks for the quick response.  Here is the code I am using to manually
> > write to the file is:
> >
> >     outFile = open("record.xml", 'w')
> >     outFile.write = ("<?xml version=\"1.0\"?>\n")
> >     outFile.write = ("<?xml-stylesheet type=\"text/xsl\"
> > href=\"test.xsl\"?>\n")
> >     outFile.write = ("<!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n")
> >     outFile.close()
> >
> > When I run the code I get the following error message:
> >
> > Traceback (most recent call last):
> >   File "bob-xml.py", line 189, in <module>
> >     main()
> >   File "bob-xml.py", line 173, in main
> >     outFile.write = ("<?xml version=\"1.0\"?>\n")
> > AttributeError: 'file' object attribute 'write' is read-only
> >
> > What am I doing wrong here?  If anyone could help that would be
> > appreciated.  Thanks again.
>
> write is a method, not a property.
>
> outFile.write("whatever")
>
> is the way to go...
>
> Diez

Great.  Got that sorted.  The problem I have now is that some of the
XML data is not copied across to the file when I have the text
information included.  The number of characters that is lost is equal
to the number of characters that is in the block of text I entered
before.  The code I am using is:

def WriteXMLRecord ( record, XMLFileBaseName, root):
RecordName = SubElement(root, "Log")
    #iterate through all the fields in the record
    for key in record:
        # write the key and its data
        test = SubElement(RecordName, key)
        test.text = str(record[key])
    tree = ElementTree(root)
    tree.write(XMLFileBaseName)

def main():
    outFile = open("record.xml", 'w')
    outFile.write("""<?xml version=\"1.0\"?>
<?xml-stylesheet type=\"text/xsl\" href=\"test.xsl\"?>
<!DOCTYPE BobActivityLog SYSTEM \"test.dtd\">\n\n""")

    root = Element("Log")
    WriteXMLRecord(data1, "record.xml", root)
    WriteXMLRecord(data2, "record.xml", root)
    WriteXMLRecord(data3, "record.xml", root)
    outFile.close()

Any help would be appreciated.  Thanks and good luck.


Craig



From shuanyu at gmail.com  Thu Nov 16 02:59:53 2006
From: shuanyu at gmail.com (many_years_after)
Date: 15 Nov 2006 23:59:53 -0800
Subject: How to make a python file to a DLL?
Message-ID: <1163663993.261179.146630@m7g2000cwm.googlegroups.com>

Any solution?

Thanks.



From arkanes at gmail.com  Wed Nov 22 09:49:28 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 22 Nov 2006 08:49:28 -0600
Subject: PyQt app in seperate thread
In-Reply-To: <1164206635.601219.36860@j44g2000cwa.googlegroups.com>
References: <1164199026.728638.180000@j44g2000cwa.googlegroups.com>
	<mailman.588.1164201252.32031.python-list@python.org>
	<1164204404.675906.59020@b28g2000cwb.googlegroups.com>
	<mailman.590.1164205630.32031.python-list@python.org>
	<1164206635.601219.36860@j44g2000cwa.googlegroups.com>
Message-ID: <4866bea60611220649t3a34d02as5f5a578d85420e07@mail.gmail.com>

On 22 Nov 2006 06:43:55 -0800, anders <anderslanglands at gmail.com> wrote:
>
> Phil Thompson wrote:
> > On Wednesday 22 November 2006 2:06 pm, anders wrote:
> > > Phil Thompson wrote:
> > > > On Wednesday 22 November 2006 12:37 pm, anders wrote:
> > > > > I am writing a plugin for a piece of software in python, and I want to
> > > > > start up a PyQt GUI in the plugin, without stalling the main thread
> > > > > while the gui is running (later i will want to pass messages between
> > > > > the main thread and the gui thread).
> > > > >
> > > > > I'm new to pyqt, so I'm probably doing something very silly, but for
> > > > > the moment I'm just trying to get the first pyqt tutorial example
> > > > > running in a seperate thread:
> > > > >
> > > > > ----8<--------
> > > > >
> > > > > import sys
> > > > > from PyQt4 import QtGui
> > > > > from PyQt4 import QtCore
> > > > >
> > > > > class MyThread( QtCore.QThread ):
> > > > >         def __init__( self ):
> > > > >                 QtCore.QThread.__init__( self )
> > > > >
> > > > >         def run( self ):
> > > > >                 app = QtGui.QApplication( sys.argv )
> > > > >                 hello = QtGui.QPushButton( 'Hello world!' )
> > > > >                 hello.resize( 500, 500 )
> > > > >                 hello.show()
> > > > >                 app.exec_()
> > > > >                 QtCore.QThread.terminate(  )
> > > > >
> > > > >
> > > > >
> > > > > mt = MyThread()
> > > > > mt.start()
> > > > > print 'Main thread continuing...'
> > > > > mt.wait()
> > > > > print 'GUI thread finished.'
> > > > >
> > > > > ----8<--------
> > > > >
> > > > > The app starts up (with a warning WARNING: QApplication was not created
> > > > > in the main() thread. ). I get a window, but no button, and clicking on
> > > > > the close button does nothing and I have to force the program to quit.
> > > > >
> > > > > There's got to be a way to get this working, right? Can anyone help me
> > > > > along the right path?
> > > >
> > > > Read http://doc.trolltech.com/4.2/threads.html
> > > >
> > > > In particular the bit that says that exec_() must be called from the main
> > > > thread and not from a QThread.
> > > >
> > > > Phil
> > >
> > > OK so that's all good... so how do I go about doing what I want then?
> > > Can I set up a window in the second thread and start its event loop
> > > without running the event loop in the core app?
> >
> > No. Read the second sentence of the paragraph I referred to. Also read the
> > section "QObject Reentrancy".
> >
> > Phil
>
> OK I see that now. Thanks for pointing that out. So basically, I can't
> do what I want at all. That's a bit of a pain. Is there no way of
> tricking Qt into thinking I'm running it in the main thread?
>

It's possible with hackery from C++ but I seriously doubt you can do
it from PyQt.


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


From sjmachin at lexicon.net  Sat Nov 18 17:49:31 2006
From: sjmachin at lexicon.net (John Machin)
Date: 18 Nov 2006 14:49:31 -0800
Subject: syntax error in sum(). Please explicate.
In-Reply-To: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
References: <jack-226B1E.14234318112006@newsclstr02.news.prodigy.com>
Message-ID: <1163890171.877239.167310@h54g2000cwb.googlegroups.com>


Michael Press wrote:
> I have not written python codes nor run any. I saw this
> code posted and decided to try it. It fails. I read the
> tutorial and the entry for the built in function sum,
> but still do not see the problem. The code was cut and
> paste.

I doubt it -- "none" should be "None"

 Please help. Thanks.
>
> _________________________BEGIN_CODE_________________________
> #!/usr/bin/python
>
> ps = [none, 2,3,5,7,11,13,17,19,23,29]
>
> def phi(x, a):
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>
> def pi(n):
>     from math import sqrt
>     if n <= 1:
>         return 0
>     a = pi(int(sqrt(n)))
>     return phi(n, a) + a - 1
> __________________________END_CODE__________________________
>
> Here is the result of running it:
>
>   File "/Users/mdp/source/prime_counter_python", line 6
>     return x - sum(phi(x // ps[i+1], i) for i in range(a))
>                                           ^
> SyntaxError: invalid syntax
>
> Here are some lines from python -v:
>
> Python 2.3 (#1, Sep 13 2003, 00:49:11)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
> Type "help", "copyright", "credits" or "license" for more information

New syntax. Python 2.3 is *two* versions behind the current production
version. Either (a) run it on Python 2.4 or 2.5 or (b) enclose the
argument to sum in square brackets i.e.

sum([blah blah blah]) instead of sum(blah blah blah)

Cheers,
John



From fredrik at pythonware.com  Wed Nov 22 02:42:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Nov 2006 08:42:23 +0100
Subject: Misleading IOerror when opening a non-existent file for append?
In-Reply-To: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
References: <1164037095.148334.157670@e3g2000cwe.googlegroups.com>
Message-ID: <ek0v0v$qh3$1@sea.gmane.org>

jkn wrote:

> This 'invalid mode: a' error message seems weird to me. Is this a bug
> or am I missimg something?

It depends on the underlying implementation of fopen(), which, on some 
platforms, doesn't set the right error code for bad mode strings. 
Python uses some simple heuristics to try to get around this (earlier 
versions could give "error: no error" for this case), but they're not 
always able to do the right thing.

</F>



From http  Sat Nov 25 05:29:41 2006
From: http (Paul Rubin)
Date: 25 Nov 2006 02:29:41 -0800
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<7xodqyn5kd.fsf@ruckus.brouhaha.com>
	<1164323350.988946.209350@l12g2000cwl.googlegroups.com>
	<mailman.662.1164330306.32031.python-list@python.org>
	<1164340388.885058.264750@l12g2000cwl.googlegroups.com>
Message-ID: <7x7ixjn7je.fsf@ruckus.brouhaha.com>

"tleeuwenburg at gmail.com" <tleeuwenburg at gmail.com> writes:
> I thought I just had. In what way does the statement "Yes, it's true
> that you can't resell copies of The Python Papers for personal profits,
> but you may derive from it, reproduce and propagate it" not provide
> such a revision and clarification? Seriously, let me know what exact
> statement you feel needs to be made, and I will endorse it accordingly
> if it is accurate.

You should not use the phrase "free as in freedom".  "Free as in beer"
is more accurate for the NC licenses.  

> For my part, I don't see that there are ethically serious restrictions
> on the freedom of use of the information contained within The Python
> Papers.

There is a big rant against the CC-NC licenses on Kuro5hin:

http://www.kuro5hin.org/story/2005/9/11/16331/0655

> Call it "mostly free" if you like. 

That is reasonable and if you're going to stick with the NC license,
it would be cool if you also were to descibe TPP as "mostly free", or
maybe "gratis" (as opposed to "libre") in your descriptions.  "Gratis"
is sometimes translated "free as in beer", in contrast with "free
as in speech" or "free as in freedom".

> There's no such thing as complete
> freedom of information anyway, and we have done the best we can.

Well, others including the Wikimedia projects (which use GFDL) and the
PLoS journals (www.plos.org) (which use CC-BY) go further than you do,
so "we have done the best we can" sounds like an apology that "the
best you can" wasn't up to the level that those other, much more
significant projects have managed to do.  Should you expect a response
other than "oh well, nice try"?

One of my desires as a free software user, for example, is to be able
to buy a new computer with a complete suite of software preinstalled
on the hard disk, including all the needed apps, development tools,
and documentation and source code for everything, and the freedom to
propagate it all in the same way.  All the GNU/Linux stuff and all the
Python.org stuff, plus more general reference works like Wikipedia,
educational materials like Wikibooks, and scientific journals like
PLOS, are licensed in ways that would permit including it with such a
computer.  It even includes some entertainment media like various
music downloads from Jamendo and the non-NC CC movies.  But your
journal would have to be omitted.

> We considered releasing under the GPL, but felt that we wanted to
> preserve two things which don't seem to be provided by it:
>   * Rights of the author to attribution as may be expected and desired
> of an academic publication. The GPL doesn't seem appropriate for
> disseminating the work of a single author.
>   * Rights of the author to have their words presented

I would have suggested the GNU Free Documentation License (GFDL) that
Wikipedia uses, but that's just me.

>   * Opportunity for the author to commercially license their works to
> other vendors. By choosing the Share Alike restriction, we have
> encouraged the free dissemination of research information without
> affecting its commercial use. 

Right, the effect on commercial use comes from the NC restriction,
not the SA restriction.

>   * Rights of the author to have their words presented

I'm not sure what you're getting at but if you mean no modified
versions, you need -ND for that.  

> It seemed to be the best middle ground between taking a strong
> ideological position on either side that would be bound to put
> people off side. It preserves some rights for the author while still
> allowing a substantial amount of free re-use.  

"Middle grounds" often combine the disadvantages of both "endpoints".
And failing to take a strong position can leave you in a weak one.

> * Reputation as an
> unbiased, financially disinterested group. 

The NC licenses withhold some rights for exclusive use by the initial
publisher, releasing only a subset to users.  That is usually not a
sign of disinterest.  For example, Cory Doctorow's novels are
published under NC licenses, which he says is working for him as a
marketing tool.  But he has a clear and undisguised financial interest
in choosing the NC license.

> By distributing under the
> license we chose, we hoped to establish our credentials.

Well, it seems to me that you're putting out yet another non-libre
publication, it's nice that it's gratis but I don't think it helps
establish credentials with FOSS users and the confusion so far may
actually be hurting.

> Your email indicates a possible concern that we are doing something
> untoward -- this was not at all intended, nor is it true.

As mentioned in another post, I feel that you're (perhaps
unintentionally) trying to attach to your publication the good
associations created by the licensing practices of the FOSS movement,
while not actually following those practices.  "Untoward" might be a
slightly overstrong term, however, you are creating confusion and
maybe suffering from it yourself.  

Here is the issue: people who write FOSS code and documentation often
make sacrifices (of their free time, or of potential revenue) in order
to do so.  They are aware of those sacrifices and make them anyway.
So it's a bit grating to those of us who work on FOSS projects (or
even just admire them) when someone comes along and tries (even
unintentionally) to attach to themselves the recognition comes from
those sacrifices, without actually making the same sacrifices.  That
may explain the reaction you're getting.


From martin.laloux at gmail.com  Thu Nov 16 07:26:49 2006
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: 16 Nov 2006 04:26:49 -0800
Subject: Tkinter & Python 2.5 Problems on MAC OS 10.3.9
In-Reply-To: <mailman.246.1163675475.32031.python-list@python.org>
References: <mailman.246.1163675475.32031.python-list@python.org>
Message-ID: <1163680008.909233.195910@h48g2000cwc.googlegroups.com>

which distribution of python you use ?

I use the one of
http://pythonmac.org/packages/py25-fat/index.html

withoutproblem



From news1 at bayerf.de  Sat Nov 25 09:53:30 2006
From: news1 at bayerf.de (Fred Bayer)
Date: Sat, 25 Nov 2006 15:53:30 +0100
Subject: Ruby/Python/REXX as a MUCK scripting language
In-Reply-To: <2006112418112116807-zobeid@techiecom>
References: <2006112418112116807-zobeid@techiecom>
Message-ID: <4sr3neF111j0gU1@mid.individual.net>


Tony Belding wrote:
> I'm interested in using an off-the-shelf interpreted language as a 
> user-accessible scripting language for a MUCK.  I'm just not sure if I 
> can find one that does everything I need.  The MUCK must be able to call 
> the interpreter and execute scripts with it, but the interpreter must 
> also be able to call functions in the MUCK code.  And then there's the 
> security issue that really worries me. . .  I have to be able to limit 
> what the interpreter can execute.  I can't have my users running scripts 
> that access the console, access the filesystem or sockets directly, or 
> call libraries or other binaries outside the MUCK.
> 
> Is this practical?  I'm thinking of Ruby or Python for this, if they can 
> meet the requirements.
> 

Don't forget Lua: www.lua.org
It fulfills your requirements and is easily embedable.



From ronrsr at gmail.com  Mon Nov 13 14:51:51 2006
From: ronrsr at gmail.com (ronrsr)
Date: 13 Nov 2006 11:51:51 -0800
Subject: Printing database output in tabular form
In-Reply-To: <mailman.88.1163447419.32031.python-list@python.org>
References: <1163446803.990020.112810@i42g2000cwa.googlegroups.com>
	<mailman.88.1163447419.32031.python-list@python.org>
Message-ID: <1163447511.497564.40740@b28g2000cwb.googlegroups.com>



On Nov 13, 2:48 pm, Fredrik Lundh <fred... at pythonware.com> wrote:
> ronrsr wrote:
> > when I try to print a web table containing output from a database, I am
> > getting more info than I want- -
>
> > I would like this to print w'o the array('c',arrays instead of strings?  what database is this, and how is that
> column defined ?
>
> </F>


It is a MySQL database - those columns are defined as BLOBs

bests, 

-rsr-



From paddy3118 at netscape.net  Wed Nov 15 09:20:27 2006
From: paddy3118 at netscape.net (Paddy)
Date: 15 Nov 2006 06:20:27 -0800
Subject: multi split function taking delimiter list
In-Reply-To: <1163573899.153057.242510@f16g2000cwb.googlegroups.com>
References: <1163534200.476392.303680@m73g2000cwd.googlegroups.com>
	<1163541478.391883.227320@e3g2000cwe.googlegroups.com>
	<1163573899.153057.242510@f16g2000cwb.googlegroups.com>
Message-ID: <1163600427.874213.41340@b28g2000cwb.googlegroups.com>


Paddy wrote:

> Paddy wrote:
>
> > martinskou at gmail.com wrote:
> >
> > > Hi, I'm looking for something like:
> > >
> > > multi_split( 'a:=b+c' , [':=','+'] )
> > >
> > > returning:
> > > ['a', ':=', 'b', '+', 'c']
> > >
> > > whats the python way to achieve this, preferably without regexp?
> > >
> > > Thanks.
> > >
> > > Martin
> >
> > I resisted my urge to use a regexp and came up with this:
> >
> > >>> from itertools import groupby
> > >>> s = 'apple=blue+cart'
> > >>> [''.join(g) for k,g in groupby(s, lambda x: x in '=+')]
> > ['apple', '=', 'blue', '+', 'cart']
> > >>>
> >
> > For me, the regexp solution would have been clearer, but I need to
> > stretch my itertools skills.
> >
> > - Paddy.
> Arghhh!
> No colon!
> Forget the above please.
>
> - Pad.

With colon:

>>> from itertools import groupby
>>> s = 'apple:=blue+cart'
>>> [''.join(g) for k,g in groupby(s,lambda x: x in ':=+')]
['apple', ':=', 'blue', '+', 'cart']
>>> 

- Pad.



From tech at axetic.com  Thu Nov 23 06:23:29 2006
From: tech at axetic.com (Tech)
Date: Thu, 23 Nov 2006 12:23:29 +0100
Subject: "10, 20, 30" to [10, 20, 30]
In-Reply-To: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
References: <1164280390.745628.167770@k70g2000cwa.googlegroups.com>
Message-ID: <456584ac$0$5085$ba4acef3@news.orange.fr>

Daniel Austria a ?crit :
> Sorry,
> 
> how can i convert a string like "10, 20, 30" to a list [10, 20, 30]
> 
> what i can do is:
> 
> s = "10, 20, 30"
> tmp = '[' + s + ']'
> l = eval(tmp)
> 
> but in my opinion this is not a nice solution
> 
> 
> daniel
> 

If you're sure that there's only ints
l = [int(item) for item in s.split(', ')]

Yannick


From fredrik at pythonware.com  Wed Nov 29 11:35:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 29 Nov 2006 17:35:05 +0100
Subject: Overloading "if object" unary operator
In-Reply-To: <1164817022.500511.295260@80g2000cwy.googlegroups.com>
References: <1164817022.500511.295260@80g2000cwy.googlegroups.com>
Message-ID: <ekkcrp$euo$2@sea.gmane.org>

Sarcastic Zombie wrote:

> If I have a class
> 
> class A:
>     __init__(id)
>         self.id = id
> 
> is there any way to overload the 'if' unary usage to detect if a
> variable has a value?

http://effbot.org/pyref/__nonzero__

</F>



From gabor at nekomancer.net  Fri Nov 17 05:43:09 2006
From: gabor at nekomancer.net (gabor)
Date: Fri, 17 Nov 2006 11:43:09 +0100
Subject: os.lisdir, gets unicode, returns unicode... USUALLY?!?!?
In-Reply-To: <455d507d$0$18480$9b622d9e@news.freenet.de>
References: <mailman.294.1163721712.32031.python-list@python.org>
	<18c54$455d019b$59ad1aca$24364@news.flashnewsgroups.com>
	<455d507d$0$18480$9b622d9e@news.freenet.de>
Message-ID: <3188c$455d923f$59ad1aca$4742@news.flashnewsgroups.com>

Martin v. L?wis wrote:
> gabor schrieb:
>> i also recommend this approach.
>>
>> also, raising an exception goes well with the principle of the least
>> surprise imho.
> 
> Are you saying you wouldn't have been surprised if that had been
> the behavior? 


yes, i would not have been surprised. because it's kind-of expected when 
dealing with input, that malformed input raises an unicode-exception.
and i would also expect, that if os.listdir completed without raising an 
exception, then the returned data is correct.

> How would you deal with that exception in your code?

depends on the application. in the one where it happened i would just 
display an error message, and tell the admins to check the 
filesystem-encoding.

(in other ones, where it's not critical to get the correct name, i would 
probably just convert the text to unicode using the "replace" behavior)

what about using flags similar to how unicode() works? strict, ignore, 
replace and maybe keep-as-bytestring.

like:
os.listdir(dirname,'strict')

i know it's not the most elegant, but it would solve most of the 
use-cases imho (at least my use-cases).

gabor


From mauriceling at acm.org  Wed Nov 15 18:39:13 2006
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 15 Nov 2006 23:39:13 GMT
Subject: Python deployment options.
In-Reply-To: <q83924-6tv.ln1@lairds.us>
References: <1162982262.010438.99260@f16g2000cwb.googlegroups.com>
	<1162985073.163257.110180@m73g2000cwd.googlegroups.com>
	<1162986129.233443.268730@h54g2000cwb.googlegroups.com>
	<1162990156.204577.198720@h48g2000cwc.googlegroups.com>
	<q83924-6tv.ln1@lairds.us>
Message-ID: <455ba51e$1@news.unimelb.edu.au>

Cameron Laird wrote:

> In article <1162990156.204577.198720 at h48g2000cwc.googlegroups.com>,
> Richard Charts <richard.charts at gmail.com> wrote:
> 			.
> 			.
> 			.
> 
>>Well on a Win machine, probably.
>>Almost every Linux machine you come across will have (most likely a
>>fairly recent build of) python.  For Macs, I'm not so sure but it's
>>probably closer to Linux than Win.
>>
> 
> 
> Recent releases of Mac OS build in Python.

Python has been part of Mac OSX since OSX 10.2 (maybe even earlier but 
10.2 is the earliest I've used).

ML


From bignose+hates-spam at benfinney.id.au  Wed Nov 29 17:59:00 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 30 Nov 2006 09:59:00 +1100
Subject: Detecting recursion loops
References: <ekk6qu$po0$1@news.albasani.net>
	<1164815293.529674.109850@l39g2000cwd.googlegroups.com>
	<ekkj14$im2$2@news.albasani.net>
Message-ID: <87hcwhrhaj.fsf@benfinney.id.au>

robert <no-spam at no-spam-no-spam.invalid> writes:

> Carl Banks wrote:
> > 2. Consider whether you're unwittingly trying to cover up a bug.
> > ISTM no matter how problematic the input is, you should at least
> > be able to make progress on it.  Are you getting this error
> > because, say, you're not incrementing a counter somewhere, and
> > thus recalling a function with the same arguments again?
>
> the "bug" comes in from the I/O input.

If a program doesn't gracefully deal with bad input, that's a bug in
the program. You should be designing your input handler so that it
will do something helpful (even if that's to stop immediately with an
informative error message) in the event of bad input, rather than
allowing that bad data to send your program into an endless loop.

-- 
 \         "People's Front To Reunite Gondwanaland: Stop the Laurasian |
  `\           Separatist Movement!"  -- wiredog, http://kuro5hin.org/ |
_o__)                                                                  |
Ben Finney



From rald86 at yahoo.fr  Thu Nov 30 17:23:11 2006
From: rald86 at yahoo.fr (Robert R.)
Date: 30 Nov 2006 14:23:11 -0800
Subject: best way to align words?
Message-ID: <1164925391.696612.64860@80g2000cwy.googlegroups.com>

Hello,

i would like to write a piece of code to help me to align some sequence
of words and suggest me the ordered common subwords of them

s0 = "this is an example of a thing i would like to have".split()
s1 = "another example of something else i would like to have".split()
s2 = 'and this is another " example " but of something ; now i would
still like to have'.split()
...
alist = (s0, s1, s2)

result should be : ('example', 'of', 'i', 'would', 'like', 'to', 'have'

but i do not know how should i start, may be have you a helpful
suggestion?
a trouble i have if when having many different strings my results tend
to be nothing while i still would like to have one of the, or maybe,
all the best matches.

best.



From paddy3118 at netscape.net  Fri Nov 24 11:37:13 2006
From: paddy3118 at netscape.net (Paddy)
Date: 24 Nov 2006 08:37:13 -0800
Subject: synching with os.walk()
In-Reply-To: <1164385629.462106.106120@j72g2000cwa.googlegroups.com>
References: <mailman.679.1164383825.32031.python-list@python.org>
	<1164385629.462106.106120@j72g2000cwa.googlegroups.com>
Message-ID: <1164386233.446742.67640@f16g2000cwb.googlegroups.com>


Paddy wrote:

> Andre Meyer wrote:
>
> > Hi all
> >
> > os.walk() is a nice generator for performing actions on all files in a
> > directory and subdirectories. However, how can one use os.walk() for walking
> > through two hierarchies at once? I want to synchronise two directories (just
> > backup for now), but cannot see how I can traverse a second one. I do this
> > now with os.listdir() recursively, which works fine, but I am afraid that
> > recursion can become inefficient for large hierarchies.
> >
> > thanks for your help
> > Andr?
>
> Walk each tree individually gathering file names relative to the head
> of the tree and modification data.
>
> compare the two sets of data to generate:
>  1. A list of what needs to be copied from the original to the copy.
>  2. A list of what needs to be copied from the copy to the original
>
> Do the copying.
>
> |You might want to show the user what needs to be done and give them
> the option of aborting after generating the copy lists.
>
> - Paddy.
P.S. If you are on a Unix type system you can use tar to do the copying
as you can easily compress the data if it needs to go over a sow link,
and tar will take care of creating any needed directories in the
destination if you create new directories as well as new files.
- Paddy.



From mail at microcorp.co.za  Fri Nov 24 01:51:32 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 24 Nov 2006 08:51:32 +0200
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com><mailman.572.1164180524.32031.python-list@python.org>
	<fc5cm25l3gucqd70gtbfk9adqnoaq859e7@4ax.com>
Message-ID: <001601c70f9d$9040dac0$03000080@hendrik>

"Tim Roberts" <timr at probo.com> wrote:


> "Hendrik van Rooyen" <mail at microcorp.co.za> wrote:
> 
> >"flamesrock" <flamesrock at gmail.com> wrote:
> >
> >8<----------------------------------
> >
> >> .... since the statement itself
> >> occurs at one time instant..
> >
> >nothing, but nothing, can occur at one time instant....
> 
> Well, as long as we're being pedantic, surely that should read "only one
> thing can occur at any time instant..."

No its worse than that - what I mean is that everything takes finite time...

:-)  Hendrik




From martin.witte at gmail.com  Thu Nov 16 03:27:09 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 16 Nov 2006 00:27:09 -0800
Subject: More puzzling behavior while subclassing datetime
In-Reply-To: <1163659104.321150.322650@e3g2000cwe.googlegroups.com>
References: <1163659104.321150.322650@e3g2000cwe.googlegroups.com>
Message-ID: <1163665629.726810.228120@m7g2000cwm.googlegroups.com>


insyte at gmail.com wrote:
> With assistance from Gabriel and Frederik (and a few old threads in
> c.l.p.) I've been making headway on my specialized datetime class.  Now
> I'm puzzled by behavior I didn't expect while attempting to use some of
> the alternate datetime constructors.  Specifically, it appears if I
> call GeneralizedTime.now() it calls the __new__ method of my class but
> treats keyword arguments as if they were positional.
>
> My class:
>
> class GeneralizedTime(datetime):
>     def __new__(cls, time=None, *args, **kwargs):
datetime.datetime() takes these arguments: year, month, day[, hour[,
minute[, second[, microsecond[, tzinfo]]]]]), see
http://docs.python.org/lib/datetime-datetime.html
>         print time, args, kwargs
>         if isinstance(time, str):
>             timeValues, tzOffset = cls.stringToTimeTuple(time)
>             return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
> **timeValues)
>         elif isinstance(time, datetime):
>             timeValues = time.timetuple()[:6]
time.timetuple() does not exist, see
http://docs.python.org/lib/module-time.html, time is represented as a
tuple. checkout time.mktime() on how to convert to a tuple to a time
>             tzOffset = time.utcoffset()
>             return datetime.__new__(cls, tzinfo=GenericTZ(tzOffset),
> *timeValues)
>         elif time is None:
>             print "Still gotta figure out now to do this one..."
>         else:
>             raise Invalidtime(time)
>     @staticmethod
>     def stringToTimeTuple(timeString):
>          ... regex that parses timeString ...
>
> >>> GeneralizedTime.today()
> 2006 (11, 16, 0, 35, 18, 747275, None) {}
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "gentime.py", line 106, in __new__
>      raise InvalidTime(time)
> gentime.InvalidTime: 2006
>
> So it appears the time tuple is being passed to
> GeneralizedTime.__new__, but the first value is being assigned to the
> "time" argument.
>
> Is this a side effect of how datetime is implemented?  Or am I doing
> something screwy?
>
> Thanks!
>
> -Ben

A very cutback part of your code gets the basics working:
from datetime import datetime
class Invalidtime(Exception):
    pass

class GeneralizedTime(datetime):
    def __new__(cls, *args, **kwargs):
        if isinstance(args, tuple):
            return datetime.__new__(cls, *args)
        else:
            raise Invalidtime(args)

t = GeneralizedTime.today()
print t.year
print t.month
print t.day
print t.hour
print t.minute
print t.second
print t.microsecond
print t.tzinfo



From apardon at forel.vub.ac.be  Wed Nov 15 03:22:46 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Nov 2006 08:22:46 GMT
Subject: Py3K idea: why not drop the colon?
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>
	<455226c0$0$17087$c3e8da3@news.astraweb.com>
	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>
	<45530513$0$25102$426a74cc@news.free.fr>
	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>
	<45535475.9090207@hobbshouse.org> <87ac30kwdn.fsf@benfinney.id.au>
	<4554AAB4.10002@hobbshouse.org>
	<mailman.2054.1163185546.11739.python-list@python.org>
	<ej5asp$e85$1@news.albasani.net>
	<mailman.2105.1163279202.11739.python-list@python.org>
	<ej5e69$j1q$1@news.albasani.net> <ej5g0e$1jp$1@sea.gmane.org>
	<17750.22816.636590.485360@montanaro.dyndns.org>
	<ej6erq$vkh$1@sea.gmane.org> <4558B9E3.2040207@hobbshouse.org>
	<mailman.95.1163450121.32031.python-list@python.org>
	<slrneljc00.r7i.apardon@rcpc42.vub.ac.be>
	<pan.2006.11.15.07.12.31.716203@REMOVEME.cybersource.com.au>
Message-ID: <slrnelljim.r7i.apardon@rcpc42.vub.ac.be>

On 2006-11-15, Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:
> On Tue, 14 Nov 2006 12:01:05 +0000, Antoon Pardon wrote:
>
>> On 2006-11-13, Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
>>> Michael Hobbs <mike at hobbshouse.org> writes:
>>>
>>>> To be clear, this is the actual thrust of my argument. It seems
>>>> redundant to have *both* line continuations and colons in compound
>>>> statements.
>>>
>>> Why are you trying to remove redundancy?
>> 
>> Why not? My impression is that removing redundancy is considered
>> a positive thing here in c.p.l.
>
> Redundancy in *what*?

Redundancy in whatever proposal the opponent doesn't like.

> Redundancy is not something to be valued for its own sake. It is only
> valuable when it actually gains you something.

In the same way it is not something to be eliminated for its own
sake. But if someone doesn't like a particulare proposal and
the proposal happens to introduce some redundancy then there is
a reasonable chance the proposal will be dismissed by simply
observing that it introduces redundancy.

> The question is not "is the colon redundant?" but "is the colon useful
> despite, or even because, its redundancy?". There are two schools of
> thought:
>
> (1) Yes, it is useful, *because* of its redundancy -- it helps the human
> reader parse and comprehend the source code.
> Evidence given: usability studies by the ABC project.

I wonder, did this project also studied the readability of:

  if a == b then

> (2) No, it is not useful, because the computer parser doesn't need it.
> Evidence given: "it seems to me" repeated loudly until our ears bleed.

A pity that no such study seems to exists concerning code that uses
only indentation to mark structure and code that uses indentation
and some kind of delimiter for showing the boundaries of (sub)
structures. Because the evidence for end markers not being usefull
seems to fall in the same category as (2) here above.

-- 
Antoon Pardon


From siona at chiark.greenend.org.uk  Thu Nov 16 11:14:46 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 16 Nov 2006 16:14:46 +0000 (GMT)
Subject: ini files and plugins
References: <455c7d58$0$21668$426a74cc@news.free.fr>
Message-ID: <2lj*DoYvr@news.chiark.greenend.org.uk>

tool69  <kib2 at free.fr> wrote:
>I've made a basic LaTeX file editor in wxPython, but now I wanted to add 
>it some features :
                                        ^^^^^^^^
>1 -  create a sort of ini file where I can put the user configuration 
>that will load itself on the application startup ;

wx.Config? (If it absolutely has to be a .ini file on Windows,
not the registry, you can force that if you want.)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From ptmcg at austin.rr._bogus_.com  Sun Nov 19 16:29:59 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Sun, 19 Nov 2006 21:29:59 GMT
Subject: Programmatically finding "significant" data points
References: <1163513101.580610.151420@b28g2000cwb.googlegroups.com>
	<ejpf2r$p8g$1@news.albasani.net>
Message-ID: <r148h.600$Gk5.492@tornado.texas.rr.com>

... dang touchy keyboard!

> Here is some sample data:
> data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
> 1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
> 0.10]
>
> In this data, some of the significant points include:
> data[0]
> data[2]
> data[4]
> data[6]
> data[8]
> data[9]
> data[13]
> data[14]

Using the first derivative, and looking for sign changes, finds many of the 
values you marked as "significant".

-- Paul


data = [0.10, 0.50, 0.60, 0.40, 0.39, 0.50, 1.00, 0.80, 0.60, 1.20,
1.10, 1.30, 1.40, 1.50, 1.05, 1.20, 0.90, 0.70, 0.80, 0.40, 0.45, 0.35,
0.10]

delta = lambda (x1,x2) : x2-x1
dy_dx =[0]+map(delta,zip(data,data[1:]))
d2y_dx2 = [0]+map(delta,zip(dy_dx,dy_dx[1:]))

sgnChange = lambda (x1,x2) : x1*x2<0
sigs = map(sgnChange,zip(dy_dx,dy_dx[1:]))
print [i for i,v in enumerate(sigs) if v]
[2, 4, 6, 8, 9, 10, 13, 14, 15, 17, 18, 19, 20] 




From steve at REMOVE.THIS.cybersource.com.au  Sat Nov 25 16:28:19 2006
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 26 Nov 2006 08:28:19 +1100
Subject: The Python Papers Edition One
References: <1164080670.604928.113480@m73g2000cwd.googlegroups.com>
	<1164106267.882164.124670@h48g2000cwc.googlegroups.com>
	<1164156093.359433.315790@e3g2000cwe.googlegroups.com>
	<1164471238.033790.243890@14g2000cws.googlegroups.com>
Message-ID: <pan.2006.11.25.21.28.19.244651@REMOVE.THIS.cybersource.com.au>

On Sat, 25 Nov 2006 08:13:58 -0800, Noah Slater wrote:

> 
> On Nov 22, 12:41 am, "tleeuwenb... at gmail.com" <tleeuwenb... at gmail.com>
> wrote:
>> Thanks for the comments. PDF is, to some extent, a requirement. To
>> preserve the entire journal as a single "entity" with a reasonably high
>> production quality, there seems to be no way around it. I could not
>> find a sufficiently simple way to do multi-format publishing with an
>> attractive layout and good typesetting.
> 
> Which is more important to the Python comunity...
> 
> Good typesetting or good, searchable, copyable, usable information?

Such a sweeping generalization, as if "the Python community" only wanted
one thing.

In any case:

(1) Whether the Python Papers is "good" depends on what content it
includes, not the file format it is published in.

(2) Google can index PDF files. If the Python Papers aren't reachable by
Google's spiders, well, I consider that the Kiss of Death for them.

(3) Code in the Python Papers are certainly legally copyable, and if your
PDF viewer doesn't let you copy text from PDFs, use another PDF viewer:

[quote from page 4 of the Python Papers]
def process(self):
  '''
      Processes the payment into the financial system
  '''
  self._recordPayment()
  self._despatchOrder()
  self._sendConfirmation()
  self._concludePayment()
def _recordPayment():
  '''
      Make a permanent record of the payment in the database
  '''
  pass

Works fine for me, although I would question the choice of TWO spaces for
indents.

(4) The Python Papers are certainly legally usable, for non-commercial
use. For commercial use, you have at least two legal options:

- treat the work the same as you would any piece of code with an
unacceptable licence, and develop your own NON-derivative version. It's
only copyrighted, not patented: you are still allowed to write your own
independent version. Merely having read a work doesn't necessarily
contaminate whatever you write next.

- contact the author of the work and ask for a commercial licence. You may
have to pay a licence fee, or perhaps not.

Instead of bitching and moaning about it, how about you submit your own
work to the Python Papers under a dual licence? It can be both CC
Non-commercial, and GPL (or whatever licence you like).

I assume the purpose of the Non-commercial licence is to prevent somebody
taking up the Python Papers in full and charging for it. (Personally, I
think that is a very low risk -- who cares if somebody tries to charge
for it? They can't compete with the gratis version being given away for
nothing.) Dual licences for the contributed articles will still protect
the over-all integrity of the magazine from being sold for profit, while
still allowing coders to duplicate useful code and use it in whatever they
choose.

That way, the Python Papers themselves continue to be free as in beer, and
individual articles can, according to their authors wishes, be *at least*
gratis and possibly free as in speech as well.



-- 
Steven.



From johnjsal at NOSPAMgmail.com  Mon Nov 13 13:07:28 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Nov 2006 13:07:28 -0500
Subject: Py3K idea: why not drop the colon?
In-Reply-To: <mailman.2063.1163190929.11739.python-list@python.org>
References: <1163011098.177396.39360@m7g2000cwm.googlegroups.com>	<455226c0$0$17087$c3e8da3@news.astraweb.com>	<slrnel6088.tvc.nick@irishsea.home.craig-wood.com>	<45530513$0$25102$426a74cc@news.free.fr>	<slrnel6dec.360.nick@irishsea.home.craig-wood.com>	<mailman.1983.1163089419.11739.python-list@python.org>	<1163089657.164900.112820@f16g2000cwb.googlegroups.com>	<mailman.1984.1163090531.11739.python-list@python.org>	<45538b0d$0$26485$c3e8da3@news.astraweb.com>
	<mailman.2063.1163190929.11739.python-list@python.org>
Message-ID: <4558b437$0$32430$c3e8da3@news.astraweb.com>

Fredrik Lundh wrote:
> John Salerno wrote:
> 
>>> Anyway, the FAQ answer seems to be a weak argument to me.
>>
>> I agree. I was expecting something more technical to justify the 
>> colon, not just that it looks better.
> 
> yeah, the whole idea of treating programming languages as an interface 
> between people and computers is really lame.  no wonder nobody's using 
> Python for anything.
> 
> </F>
> 

personally, i don't mind the colon and see no need to lose it, but if we 
are talking in the realm of aesthetics, it actually seems like it would 
be cleaner if it weren't there...sure, at first everyone who is used to 
it might feel like something is missing, or the line is "hanging" open, 
but overall the less characters, the better, right? isn't that why the 
braces are gone?


From mail at microcorp.co.za  Wed Nov 22 01:56:48 2006
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 22 Nov 2006 08:56:48 +0200
Subject: Is time.time() < time.time() always true?
References: <1164150625.377064.112550@j44g2000cwa.googlegroups.com>
Message-ID: <015d01c70e05$f7564540$03000080@hendrik>

"flamesrock" <flamesrock at gmail.com> wrote:

8<----------------------------------

> .... since the statement itself
> occurs at one time instant..

nothing, but nothing, can occur at one time instant....

- Hendrik